feat: simulador GPS con cron job y pub/sub Redis

2026-05-23 01:06:04 -06:00
parent 1667e4fb66
commit d1bfc9fbac
280 changed files with 30733 additions and 11 deletions
--- a/backend/env
+++ b/backend/env
@@ -0,0 +1,20 @@
 PORT=3000
 DB_HOST=localhost
 DB_PORT=5433
 DB_NAME=recoleccion_db
 DB_USER=recoleccion
 DB_PASSWORD=recoleccion123
 REDIS_HOST=localhost
 REDIS_PORT=6380
 JWT_SECRET=hackathon_celaya_2026_secret_key
 JWT_EXPIRES_IN=7d
 # Simulador GPS
 # TIME_MULTIPLIER: cuántos segundos simulados por segundo real
 # 1   = tiempo real | 60 = demo (1 min real = 1 hora simulada)
 TIME_MULTIPLIER=60
 # CRON_SCHEDULE: cada cuánto corre el simulador
 # '*/1 * * * *'   = cada 1 minuto (recomendado)
 # '*/30 * * * * *' = cada 30 segundos (más responsivo en demo)
 CRON_SCHEDULE=*/1 * * * *
--- a/backend/node_modules/.package-lock.json
+++ b/backend/node_modules/.package-lock.json
@@ -4,6 +4,12 @@
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
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      "resolved": "https://registry.npmjs.org/@ioredis/commands/-/commands-1.5.1.tgz",
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@@ -238,6 +244,15 @@
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      }
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    "node_modules/cluster-key-slot": {
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@@ -321,6 +336,15 @@
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@@ -782,6 +806,53 @@
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      "license": "MIT",
      "dependencies": {
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        "cluster-key-slot": "^1.1.0",
        "debug": "^4.3.4",
        "denque": "^2.1.0",
        "lodash.defaults": "^4.2.0",
        "lodash.isarguments": "^3.1.0",
        "redis-errors": "^1.2.0",
        "redis-parser": "^3.0.0",
        "standard-as-callback": "^2.1.0"
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    "node_modules/ioredis/node_modules/ms": {
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@@ -886,12 +957,24 @@
        "safe-buffer": "^5.0.1"
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      "license": "MIT"
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      "license": "MIT"
    },
    "node_modules/lodash.isarguments": {
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      "license": "MIT"
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@@ -1028,6 +1111,15 @@
        "node": ">= 0.6"
      }
    },
    "node_modules/node-cron": {
      "version": "4.2.1",
      "resolved": "https://registry.npmjs.org/node-cron/-/node-cron-4.2.1.tgz",
      "integrity": "sha512-lgimEHPE/QDgFlywTd8yTR61ptugX3Qer29efeyWw2rv259HtGBNn1vZVmp8lB9uo9wC0t/AT4iGqXxia+CJFg==",
      "license": "ISC",
      "engines": {
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      }
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      "version": "3.1.14",
      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.14.tgz",
@@ -1362,6 +1454,27 @@
        "node": ">=8.10.0"
      }
    },
    "node_modules/redis-errors": {
      "version": "1.2.0",
      "resolved": "https://registry.npmjs.org/redis-errors/-/redis-errors-1.2.0.tgz",
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      "license": "MIT",
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    },
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      "license": "MIT",
      "dependencies": {
        "redis-errors": "^1.0.0"
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@@ -1545,6 +1658,12 @@
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--- a/backend/node_modules/@ioredis/commands/LICENSE
+++ b/backend/node_modules/@ioredis/commands/LICENSE
@@ -0,0 +1,23 @@
 The MIT License (MIT)
 Copyright (c) 2022 Zihua Li
 Copyright (c) 2015 NodeRedis
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
--- a/backend/node_modules/@ioredis/commands/README.md
+++ b/backend/node_modules/@ioredis/commands/README.md
@@ -0,0 +1,43 @@
 # Redis Commands
 This module exports all the commands that Redis supports.
 ## Install
 ```shell
 $ npm install @ioredis/commands
 ```
 ## Usage
 ```js
 const commands = require('@ioredis/commands');
 ```
 `.list` is an array contains all the lowercased commands:
 ```js
 commands.list.forEach((command) => {
  console.log(command);
 });
 ```
 `.exists()` is used to check if the command exists:
 ```js
 commands.exists('set') // true
 commands.exists('other-command') // false
 ```
 `.hasFlag()` is used to check if the command has the flag:
 ```js
 commands.hasFlag('set', 'readonly') // false
 ```
 `.getKeyIndexes()` is used to get the indexes of keys in the command arguments:
 ```js
 commands.getKeyIndexes('set', ['key', 'value']) // [0]
 commands.getKeyIndexes('mget', ['key1', 'key2']) // [0, 1]
 ```
--- a/backend/node_modules/@ioredis/commands/built/commands.json
+++ b/backend/node_modules/@ioredis/commands/built/commands.json
--- a/backend/node_modules/@ioredis/commands/built/index.d.ts
+++ b/backend/node_modules/@ioredis/commands/built/index.d.ts
@@ -0,0 +1,34 @@
 /// <reference types="node" />
 /**
 * Redis command list
 *
 * All commands are lowercased.
 */
 export declare const list: string[];
 /**
 * Check if the command exists
 */
 export declare function exists(commandName: string, options?: {
    caseInsensitive?: boolean;
 }): boolean;
 /**
 * Check if the command has the flag
 *
 * Some of possible flags: readonly, noscript, loading
 */
 export declare function hasFlag(commandName: string, flag: string, options?: {
    nameCaseInsensitive?: boolean;
 }): boolean;
 /**
 * Get indexes of keys in the command arguments
 *
 * @example
 * ```javascript
 * getKeyIndexes('set', ['key', 'value']) // [0]
 * getKeyIndexes('mget', ['key1', 'key2']) // [0, 1]
 * ```
 */
 export declare function getKeyIndexes(commandName: string, args: (string | Buffer | number)[], options?: {
    parseExternalKey?: boolean;
    nameCaseInsensitive?: boolean;
 }): number[];
--- a/backend/node_modules/@ioredis/commands/built/index.js
+++ b/backend/node_modules/@ioredis/commands/built/index.js
@@ -0,0 +1,217 @@
 "use strict";
 var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.getKeyIndexes = exports.hasFlag = exports.exists = exports.list = void 0;
 const commands_json_1 = __importDefault(require("./commands.json"));
 /**
 * Redis command list
 *
 * All commands are lowercased.
 */
 exports.list = Object.keys(commands_json_1.default);
 const flags = {};
 exports.list.forEach((commandName) => {
    flags[commandName] = commands_json_1.default[commandName].flags.reduce(function (flags, flag) {
        flags[flag] = true;
        return flags;
    }, {});
 });
 /**
 * Check if the command exists
 */
 function exists(commandName, options) {
    commandName = (options === null || options === void 0 ? void 0 : options.caseInsensitive)
        ? String(commandName).toLowerCase()
        : commandName;
    return Boolean(commands_json_1.default[commandName]);
 }
 exports.exists = exists;
 /**
 * Check if the command has the flag
 *
 * Some of possible flags: readonly, noscript, loading
 */
 function hasFlag(commandName, flag, options) {
    commandName = (options === null || options === void 0 ? void 0 : options.nameCaseInsensitive)
        ? String(commandName).toLowerCase()
        : commandName;
    if (!flags[commandName]) {
        throw new Error("Unknown command " + commandName);
    }
    return Boolean(flags[commandName][flag]);
 }
 exports.hasFlag = hasFlag;
 /**
 * Get indexes of keys in the command arguments
 *
 * @example
 * ```javascript
 * getKeyIndexes('set', ['key', 'value']) // [0]
 * getKeyIndexes('mget', ['key1', 'key2']) // [0, 1]
 * ```
 */
 function getKeyIndexes(commandName, args, options) {
    commandName = (options === null || options === void 0 ? void 0 : options.nameCaseInsensitive)
        ? String(commandName).toLowerCase()
        : commandName;
    const command = commands_json_1.default[commandName];
    if (!command) {
        throw new Error("Unknown command " + commandName);
    }
    if (!Array.isArray(args)) {
        throw new Error("Expect args to be an array");
    }
    const keys = [];
    const parseExternalKey = Boolean(options && options.parseExternalKey);
    const takeDynamicKeys = (args, startIndex) => {
        const keys = [];
        const keyStop = Number(args[startIndex]);
        for (let i = 0; i < keyStop; i++) {
            keys.push(i + startIndex + 1);
        }
        return keys;
    };
    const takeKeyAfterToken = (args, startIndex, token) => {
        for (let i = startIndex; i < args.length - 1; i += 1) {
            if (String(args[i]).toLowerCase() === token.toLowerCase()) {
                return i + 1;
            }
        }
        return null;
    };
    switch (commandName) {
        case "zunionstore":
        case "zinterstore":
        case "zdiffstore":
            keys.push(0, ...takeDynamicKeys(args, 1));
            break;
        case "eval":
        case "evalsha":
        case "eval_ro":
        case "evalsha_ro":
        case "fcall":
        case "fcall_ro":
        case "blmpop":
        case "bzmpop":
            keys.push(...takeDynamicKeys(args, 1));
            break;
        case "sintercard":
        case "lmpop":
        case "zunion":
        case "zinter":
        case "zmpop":
        case "zintercard":
        case "zdiff": {
            keys.push(...takeDynamicKeys(args, 0));
            break;
        }
        case "georadius": {
            keys.push(0);
            const storeKey = takeKeyAfterToken(args, 5, "STORE");
            if (storeKey)
                keys.push(storeKey);
            const distKey = takeKeyAfterToken(args, 5, "STOREDIST");
            if (distKey)
                keys.push(distKey);
            break;
        }
        case "georadiusbymember": {
            keys.push(0);
            const storeKey = takeKeyAfterToken(args, 4, "STORE");
            if (storeKey)
                keys.push(storeKey);
            const distKey = takeKeyAfterToken(args, 4, "STOREDIST");
            if (distKey)
                keys.push(distKey);
            break;
        }
        case "sort":
        case "sort_ro":
            keys.push(0);
            for (let i = 1; i < args.length - 1; i++) {
                let arg = args[i];
                if (typeof arg !== "string") {
                    continue;
                }
                const directive = arg.toUpperCase();
                if (directive === "GET") {
                    i += 1;
                    arg = args[i];
                    if (arg !== "#") {
                        if (parseExternalKey) {
                            keys.push([i, getExternalKeyNameLength(arg)]);
                        }
                        else {
                            keys.push(i);
                        }
                    }
                }
                else if (directive === "BY") {
                    i += 1;
                    if (parseExternalKey) {
                        keys.push([i, getExternalKeyNameLength(args[i])]);
                    }
                    else {
                        keys.push(i);
                    }
                }
                else if (directive === "STORE") {
                    i += 1;
                    keys.push(i);
                }
            }
            break;
        case "migrate":
            if (args[2] === "") {
                for (let i = 5; i < args.length - 1; i++) {
                    const arg = args[i];
                    if (typeof arg === "string" && arg.toUpperCase() === "KEYS") {
                        for (let j = i + 1; j < args.length; j++) {
                            keys.push(j);
                        }
                        break;
                    }
                }
            }
            else {
                keys.push(2);
            }
            break;
        case "xreadgroup":
        case "xread":
            // Keys are 1st half of the args after STREAMS argument.
            for (let i = commandName === "xread" ? 0 : 3; i < args.length - 1; i++) {
                if (String(args[i]).toUpperCase() === "STREAMS") {
                    for (let j = i + 1; j <= i + (args.length - 1 - i) / 2; j++) {
                        keys.push(j);
                    }
                    break;
                }
            }
            break;
        default:
            // Step has to be at least one in this case, otherwise the command does
            // not contain a key.
            if (command.step > 0) {
                const keyStart = command.keyStart - 1;
                const keyStop = command.keyStop > 0
                    ? command.keyStop
                    : args.length + command.keyStop + 1;
                for (let i = keyStart; i < keyStop; i += command.step) {
                    keys.push(i);
                }
            }
            break;
    }
    return keys;
 }
 exports.getKeyIndexes = getKeyIndexes;
 function getExternalKeyNameLength(key) {
    if (typeof key !== "string") {
        key = String(key);
    }
    const hashPos = key.indexOf("->");
    return hashPos === -1 ? key.length : hashPos;
 }
--- a/backend/node_modules/@ioredis/commands/package.json
+++ b/backend/node_modules/@ioredis/commands/package.json
@@ -0,0 +1,52 @@
 {
  "name": "@ioredis/commands",
  "version": "1.5.1",
  "description": "Redis commands",
  "main": "built/index.js",
  "files": [
    "built/",
    "commands.json"
  ],
  "scripts": {
    "pretest": "npm run lint",
    "test": "mocha",
    "build": "rm -rf built && tsc",
    "gen": "node tools/build",
    "lint": "standard --fix --verbose | snazzy",
    "release": "release-it"
  },
  "publishConfig": {
    "access": "public",
    "registry": "https://registry.npmjs.org/"
  },
  "repository": {
    "type": "git",
    "url": "https://github.com/ioredis/commands.git"
  },
  "keywords": [
    "redis",
    "commands",
    "prefix"
  ],
  "author": "Zihua Li <i@zihua.li> (http://zihua.li)",
  "license": "MIT",
  "bugs": {
    "url": "https://github.com/ioredis/commands/issues"
  },
  "homepage": "https://github.com/ioredis/commands",
  "devDependencies": {
    "@release-it/conventional-changelog": "^4.2.0",
    "@semantic-release/changelog": "^6.0.1",
    "@semantic-release/commit-analyzer": "^9.0.2",
    "@semantic-release/git": "^10.0.1",
    "chai": "^4.3.6",
    "ioredis": "^5.0.6",
    "mocha": "^9.2.1",
    "release-it": "^14.12.5",
    "safe-stable-stringify": "^2.3.1",
    "semantic-release": "^19.0.2",
    "snazzy": "^9.0.0",
    "standard": "^16.0.4",
    "typescript": "^4.6.2"
  }
 }
--- a/backend/node_modules/cluster-key-slot/.eslintrc
+++ b/backend/node_modules/cluster-key-slot/.eslintrc
@@ -0,0 +1,16 @@
 {
  "extends": "airbnb-base/legacy",
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    "no-param-reassign": 0,
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  "globals": {}
 }
--- a/backend/node_modules/cluster-key-slot/LICENSE
+++ b/backend/node_modules/cluster-key-slot/LICENSE
@@ -0,0 +1,13 @@
 Copyright (c) 2018 Mike Diarmid (Salakar) <mike.diarmid@gmail.com>
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this library except in compliance with the License.
 You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
--- a/backend/node_modules/cluster-key-slot/README.md
+++ b/backend/node_modules/cluster-key-slot/README.md
@@ -0,0 +1,61 @@
 [![Coverage Status](https://coveralls.io/repos/github/Salakar/cluster-key-slot/badge.svg?branch=master)](https://coveralls.io/github/Salakar/cluster-key-slot?branch=master)
 ![Downloads](https://img.shields.io/npm/dt/cluster-key-slot.svg)
 [![npm version](https://img.shields.io/npm/v/cluster-key-slot.svg)](https://www.npmjs.com/package/cluster-key-slot)
 [![dependencies](https://img.shields.io/david/Salakar/cluster-key-slot.svg)](https://david-dm.org/Salakar/cluster-key-slot)
 [![License](https://img.shields.io/npm/l/cluster-key-slot.svg)](/LICENSE)
 <a href="https://twitter.com/mikediarmid"><img src="https://img.shields.io/twitter/follow/mikediarmid.svg?style=social&label=Follow" alt="Follow on Twitter"></a>
 # Redis Key Slot Calculator
 A high performance redis cluster key slot calculator for node redis clients e.g. [node_redis](https://github.com/NodeRedis/node_redis), [ioredis](https://github.com/luin/ioredis) and [redis-clustr](https://github.com/gosquared/redis-clustr/).
 This also handles key tags such as `somekey{actualTag}`.
 ## Install
 Install with [NPM](https://npmjs.org/):
 ```
 npm install cluster-key-slot --save
 ```
 ## Usage
 ```js
 const calculateSlot = require('cluster-key-slot');
 const calculateMultipleSlots = require('cluster-key-slot').generateMulti;
 // ...
 // a single slot number
 const slot = calculateSlot('test:key:{butOnlyThis}redis');
 // Buffer is also supported
 const anotherSlot = calculateSlot(Buffer.from([0x7b, 0x7d, 0x2a]));
 // multiple keys - multi returns a single key slot number, returns -1 if any
 // of the keys does not match the base slot number (base is defaulted to first keys slot)
 // This is useful to quickly determine a singe slot for multi keys operations.
 const slotForRedisMulti = calculateMultipleSlots([
  'test:key:{butOnlyThis}redis',
  'something:key45:{butOnlyThis}hello',
  'example:key46:{butOnlyThis}foobar',
 ]);
 ```
 ## Benchmarks
 `OLD` in these benchmarks refers to the `ioredis` crc calc and many of the other calculators that use `Buffer`.
 ```text
 node -v                                                                                                                                                                                                ✔  16.38G RAM  10:29:07
 v10.15.3
 NEW tags x 721,445 ops/sec ±0.44% (90 runs sampled)
 OLD tags x 566,777 ops/sec ±0.97% (96 runs sampled)
 NEW without tags x 2,054,845 ops/sec ±1.77% (92 runs sampled)
 OLD without tags x 865,839 ops/sec ±0.43% (96 runs sampled)
 NEW without tags singular x 6,354,097 ops/sec ±1.25% (94 runs sampled)
 OLD without tags singular x 4,012,250 ops/sec ±0.96% (94 runs sampled)
 NEW tags (Buffer) x 552,346 ops/sec ±1.35% (92 runs sampled)
 ```
--- a/backend/node_modules/cluster-key-slot/index.d.ts
+++ b/backend/node_modules/cluster-key-slot/index.d.ts
@@ -0,0 +1,10 @@
 declare module 'cluster-key-slot' {
  // Convert a string or Buffer into a redis slot hash.
  function calculate(value: string | Buffer): number;
  // Convert an array of multiple strings or Buffers into a redis slot hash.
  // Returns -1 if one of the keys is not for the same slot as the others
  export function generateMulti(values: Array<string | Buffer>): number;
  export = calculate;
 }
--- a/backend/node_modules/cluster-key-slot/lib/index.js
+++ b/backend/node_modules/cluster-key-slot/lib/index.js
@@ -0,0 +1,166 @@
 /*
 * Copyright 2001-2010 Georges Menie (www.menie.org)
 * Copyright 2010 Salvatore Sanfilippo (adapted to Redis coding style)
 * Copyright 2015 Zihua Li (http://zihua.li) (ported to JavaScript)
 * Copyright 2016 Mike Diarmid (http://github.com/salakar) (re-write for performance, ~700% perf inc)
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the University of California, Berkeley nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 /* CRC16 implementation according to CCITT standards.
 *
 * Note by @antirez: this is actually the XMODEM CRC 16 algorithm, using the
 * following parameters:
 *
 * Name                       : "XMODEM", also known as "ZMODEM", "CRC-16/ACORN"
 * Width                      : 16 bit
 * Poly                       : 1021 (That is actually x^16 + x^12 + x^5 + 1)
 * Initialization             : 0000
 * Reflect Input byte         : False
 * Reflect Output CRC         : False
 * Xor constant to output CRC : 0000
 * Output for "123456789"     : 31C3
 */
 var lookup = [
  0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
  0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
  0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
  0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
  0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
  0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
  0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
  0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
  0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
  0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
  0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
  0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
  0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
  0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
  0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
  0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
  0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
  0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
  0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
  0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
  0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
  0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
  0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
  0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
  0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
  0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
  0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
  0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
  0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
  0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
  0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
  0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
 ];
 /**
 * Convert a string to a UTF8 array - faster than via buffer
 * @param str
 * @returns {Array}
 */
 var toUTF8Array = function toUTF8Array(str) {
  var char;
  var i = 0;
  var p = 0;
  var utf8 = [];
  var len = str.length;
  for (; i < len; i++) {
    char = str.charCodeAt(i);
    if (char < 128) {
      utf8[p++] = char;
    } else if (char < 2048) {
      utf8[p++] = (char >> 6) | 192;
      utf8[p++] = (char & 63) | 128;
    } else if (
        ((char & 0xFC00) === 0xD800) && (i + 1) < str.length &&
        ((str.charCodeAt(i + 1) & 0xFC00) === 0xDC00)) {
      char = 0x10000 + ((char & 0x03FF) << 10) + (str.charCodeAt(++i) & 0x03FF);
      utf8[p++] = (char >> 18) | 240;
      utf8[p++] = ((char >> 12) & 63) | 128;
      utf8[p++] = ((char >> 6) & 63) | 128;
      utf8[p++] = (char & 63) | 128;
    } else {
      utf8[p++] = (char >> 12) | 224;
      utf8[p++] = ((char >> 6) & 63) | 128;
      utf8[p++] = (char & 63) | 128;
    }
  }
  return utf8;
 };
 /**
 * Convert a string into a redis slot hash.
 * @param str
 * @returns {number}
 */
 var generate = module.exports = function generate(str) {
  var char;
  var i = 0;
  var start = -1;
  var result = 0;
  var resultHash = 0;
  var utf8 = typeof str === 'string' ? toUTF8Array(str) : str;
  var len = utf8.length;
  while (i < len) {
    char = utf8[i++];
    if (start === -1) {
      if (char === 0x7B) {
        start = i;
      }
    } else if (char !== 0x7D) {
      resultHash = lookup[(char ^ (resultHash >> 8)) & 0xFF] ^ (resultHash << 8);
    } else if (i - 1 !== start) {
      return resultHash & 0x3FFF;
    }
    result = lookup[(char ^ (result >> 8)) & 0xFF] ^ (result << 8);
  }
  return result & 0x3FFF;
 };
 /**
 * Convert an array of multiple strings into a redis slot hash.
 * Returns -1 if one of the keys is not for the same slot as the others
 * @param keys
 * @returns {number}
 */
 module.exports.generateMulti = function generateMulti(keys) {
  var i = 1;
  var len = keys.length;
  var base = generate(keys[0]);
  while (i < len) {
    if (generate(keys[i++]) !== base) return -1;
  }
  return base;
 };
--- a/backend/node_modules/cluster-key-slot/package.json
+++ b/backend/node_modules/cluster-key-slot/package.json
@@ -0,0 +1,56 @@
 {
  "name": "cluster-key-slot",
  "version": "1.1.2",
  "description": "Generates CRC hashes for strings - for use by node redis clients to determine key slots.",
  "main": "lib/index.js",
  "types": "index.d.ts",
  "scripts": {
    "benchmark": "node ./benchmark",
    "posttest": "eslint ./lib && npm run coveralls",
    "coveralls": "cat ./coverage/lcov.info | coveralls",
    "test": "node ./node_modules/istanbul/lib/cli.js cover --preserve-comments ./node_modules/mocha/bin/_mocha -- -R spec",
    "coverage:check": "node ./node_modules/istanbul/lib/cli.js check-coverage --branch 100 --statement 100"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/Salakar/cluster-key-slot.git"
  },
  "keywords": [
    "redis",
    "hash",
    "crc",
    "slot",
    "calc",
    "javascript",
    "node",
    "node_redis",
    "ioredis"
  ],
  "engines": {
    "node": ">=0.10.0"
  },
  "devDependencies": {
    "benchmark": "^2.1.0",
    "codeclimate-test-reporter": "^0.3.1",
    "coveralls": "^2.11.9",
    "eslint": "^3.5.0",
    "eslint-config-airbnb-base": "^7.1.0",
    "eslint-plugin-import": "^1.8.0",
    "istanbul": "^0.4.0",
    "mocha": "^3.0.2"
  },
  "author": {
    "name": "Mike Diarmid",
    "email": "mike.diarmid@gmail.com",
    "url": "http://github.com/Salakar/"
  },
  "license": "Apache-2.0",
  "bugs": {
    "url": "https://github.com/Salakar/cluster-key-slot/issues"
  },
  "homepage": "https://github.com/Salakar/cluster-key-slot#readme",
  "directories": {
    "test": "test",
    "lib": "lib"
  }
 }
--- a/backend/node_modules/denque/CHANGELOG.md
+++ b/backend/node_modules/denque/CHANGELOG.md
@@ -0,0 +1,29 @@
 ## 2.1.0
 - fix: issue where `clear()` is still keeping references to the elements (#47)
 - refactor: performance optimizations for growth and array copy (#43)
 - refactor: performance optimizations for toArray and fromArray (#46)
 - test: add additional benchmarks for queue growth and `toArray` (#45)
 ## 2.0.1
 - fix(types): incorrect return type on `size()`
 ## 2.0.0
 - fix!: `push` & `unshift` now accept `undefined` values to match behaviour of `Array` (fixes #25) (#35)
   - This is only a **BREAKING** change if you are currently expecting `push(undefined)` and `unshift(undefined)` to do
     nothing - the new behaviour now correctly adds undefined values to the queue.
   - **Note**: behaviour of `push()` & `unshift()` (no arguments) remains unchanged (nothing gets added to the queue).
   - **Note**: If you need to differentiate between `undefined` values in the queue and the return value of `pop()` then
     check the queue `.length` before popping.
 - fix: incorrect methods in types definition file
 ## 1.5.1
 - perf: minor performance tweak when growing queue size (#29)
 ## 1.5.0
 - feat: adds capacity option for circular buffers (#27)
--- a/backend/node_modules/denque/LICENSE
+++ b/backend/node_modules/denque/LICENSE
@@ -0,0 +1,201 @@
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--- a/backend/node_modules/denque/README.md
+++ b/backend/node_modules/denque/README.md
@@ -0,0 +1,77 @@
 <p align="center">
  <h1 align="center">Denque</h1>
 </p>
 <p align="center">
  <a href="https://www.npmjs.com/package/denque"><img src="https://img.shields.io/npm/dm/denque.svg?style=flat-square" alt="NPM downloads"></a>
  <a href="https://www.npmjs.com/package/denque"><img src="https://img.shields.io/npm/v/denque.svg?style=flat-square" alt="NPM version"></a>
  <a href="https://github.com/invertase/denque/actions/workflows/testing.yam"><img src="https://github.com/invertase/denque/actions/workflows/testing.yaml/badge.svg" alt="Tests status"></a>
  <a href="https://codecov.io/gh/invertase/denque"><img src="https://codecov.io/gh/invertase/denque/branch/master/graph/badge.svg?token=rn91iI4bSe" alt="Coverage"></a>
  <a href="/LICENSE"><img src="https://img.shields.io/npm/l/denque.svg?style=flat-square" alt="License"></a>
  <a href="https://twitter.com/invertaseio"><img src="https://img.shields.io/twitter/follow/invertaseio.svg?style=social&label=Follow" alt="Follow on Twitter"></a>
 </p>
 Denque is a well tested, extremely fast and lightweight [double-ended queue](http://en.wikipedia.org/wiki/Double-ended_queue)
 implementation with zero dependencies and includes TypeScript types.
 Double-ended queues can also be used as a:
 - [Stack](http://en.wikipedia.org/wiki/Stack_\(abstract_data_type\))
 - [Queue](http://en.wikipedia.org/wiki/Queue_\(data_structure\))
 This implementation is currently the fastest available, even faster than `double-ended-queue`, see the [benchmarks](https://docs.page/invertase/denque/benchmarks).
 Every queue operation is done at a constant `O(1)` - including random access from `.peekAt(index)`.
 **Works on all node versions >= v0.10**
 ## Quick Start
 Install the package:
 ```bash
 npm install denque
 ```
 Create and consume a queue:
 ```js
 const Denque = require("denque");
 const denque = new Denque([1,2,3,4]);
 denque.shift(); // 1
 denque.pop(); // 4
 ```
 See the [API reference documentation](https://docs.page/invertase/denque/api) for more examples.
 ---
 ## Who's using it?
 - [Kafka Node.js client](https://www.npmjs.com/package/kafka-node)
 - [MariaDB Node.js client](https://www.npmjs.com/package/mariadb)
 - [MongoDB Node.js client](https://www.npmjs.com/package/mongodb)
 - [MySQL Node.js client](https://www.npmjs.com/package/mysql2)
 - [Redis Node.js clients](https://www.npmjs.com/package/redis)
 ... and [many more](https://www.npmjs.com/browse/depended/denque).
 ---
 ## License
 - See [LICENSE](/LICENSE)
 ---
 <p align="center">
  <a href="https://invertase.io/?utm_source=readme&utm_medium=footer&utm_campaign=denque">
    <img width="75px" src="https://static.invertase.io/assets/invertase/invertase-rounded-avatar.png">
  </a>
  <p align="center">
    Built and maintained by <a href="https://invertase.io/?utm_source=readme&utm_medium=footer&utm_campaign=denque">Invertase</a>.
  </p>
 </p>
--- a/backend/node_modules/denque/index.d.ts
+++ b/backend/node_modules/denque/index.d.ts
@@ -0,0 +1,47 @@
 declare class Denque<T = any> {
  length: number;
  constructor();
  constructor(array: T[]);
  constructor(array: T[], options: IDenqueOptions);
  push(item: T): number;
  unshift(item: T): number;
  pop(): T | undefined;
  shift(): T | undefined;
  peekBack(): T | undefined;
  peekFront(): T | undefined;
  peekAt(index: number): T | undefined;
  get(index: number): T | undefined;
  remove(index: number, count: number): T[];
  removeOne(index: number): T | undefined;
  splice(index: number, count: number, ...item: T[]): T[] | undefined;
  isEmpty(): boolean;
  clear(): void;
  size(): number;
  toString(): string;
  toArray(): T[];
 }
 interface IDenqueOptions {
  capacity?: number
 }
 export = Denque;
--- a/backend/node_modules/denque/index.js
+++ b/backend/node_modules/denque/index.js
@@ -0,0 +1,481 @@
 'use strict';
 /**
 * Custom implementation of a double ended queue.
 */
 function Denque(array, options) {
  var options = options || {};
  this._capacity = options.capacity;
  this._head = 0;
  this._tail = 0;
  if (Array.isArray(array)) {
    this._fromArray(array);
  } else {
    this._capacityMask = 0x3;
    this._list = new Array(4);
  }
 }
 /**
 * --------------
 *  PUBLIC API
 * -------------
 */
 /**
 * Returns the item at the specified index from the list.
 * 0 is the first element, 1 is the second, and so on...
 * Elements at negative values are that many from the end: -1 is one before the end
 * (the last element), -2 is two before the end (one before last), etc.
 * @param index
 * @returns {*}
 */
 Denque.prototype.peekAt = function peekAt(index) {
  var i = index;
  // expect a number or return undefined
  if ((i !== (i | 0))) {
    return void 0;
  }
  var len = this.size();
  if (i >= len || i < -len) return undefined;
  if (i < 0) i += len;
  i = (this._head + i) & this._capacityMask;
  return this._list[i];
 };
 /**
 * Alias for peekAt()
 * @param i
 * @returns {*}
 */
 Denque.prototype.get = function get(i) {
  return this.peekAt(i);
 };
 /**
 * Returns the first item in the list without removing it.
 * @returns {*}
 */
 Denque.prototype.peek = function peek() {
  if (this._head === this._tail) return undefined;
  return this._list[this._head];
 };
 /**
 * Alias for peek()
 * @returns {*}
 */
 Denque.prototype.peekFront = function peekFront() {
  return this.peek();
 };
 /**
 * Returns the item that is at the back of the queue without removing it.
 * Uses peekAt(-1)
 */
 Denque.prototype.peekBack = function peekBack() {
  return this.peekAt(-1);
 };
 /**
 * Returns the current length of the queue
 * @return {Number}
 */
 Object.defineProperty(Denque.prototype, 'length', {
  get: function length() {
    return this.size();
  }
 });
 /**
 * Return the number of items on the list, or 0 if empty.
 * @returns {number}
 */
 Denque.prototype.size = function size() {
  if (this._head === this._tail) return 0;
  if (this._head < this._tail) return this._tail - this._head;
  else return this._capacityMask + 1 - (this._head - this._tail);
 };
 /**
 * Add an item at the beginning of the list.
 * @param item
 */
 Denque.prototype.unshift = function unshift(item) {
  if (arguments.length === 0) return this.size();
  var len = this._list.length;
  this._head = (this._head - 1 + len) & this._capacityMask;
  this._list[this._head] = item;
  if (this._tail === this._head) this._growArray();
  if (this._capacity && this.size() > this._capacity) this.pop();
  if (this._head < this._tail) return this._tail - this._head;
  else return this._capacityMask + 1 - (this._head - this._tail);
 };
 /**
 * Remove and return the first item on the list,
 * Returns undefined if the list is empty.
 * @returns {*}
 */
 Denque.prototype.shift = function shift() {
  var head = this._head;
  if (head === this._tail) return undefined;
  var item = this._list[head];
  this._list[head] = undefined;
  this._head = (head + 1) & this._capacityMask;
  if (head < 2 && this._tail > 10000 && this._tail <= this._list.length >>> 2) this._shrinkArray();
  return item;
 };
 /**
 * Add an item to the bottom of the list.
 * @param item
 */
 Denque.prototype.push = function push(item) {
  if (arguments.length === 0) return this.size();
  var tail = this._tail;
  this._list[tail] = item;
  this._tail = (tail + 1) & this._capacityMask;
  if (this._tail === this._head) {
    this._growArray();
  }
  if (this._capacity && this.size() > this._capacity) {
    this.shift();
  }
  if (this._head < this._tail) return this._tail - this._head;
  else return this._capacityMask + 1 - (this._head - this._tail);
 };
 /**
 * Remove and return the last item on the list.
 * Returns undefined if the list is empty.
 * @returns {*}
 */
 Denque.prototype.pop = function pop() {
  var tail = this._tail;
  if (tail === this._head) return undefined;
  var len = this._list.length;
  this._tail = (tail - 1 + len) & this._capacityMask;
  var item = this._list[this._tail];
  this._list[this._tail] = undefined;
  if (this._head < 2 && tail > 10000 && tail <= len >>> 2) this._shrinkArray();
  return item;
 };
 /**
 * Remove and return the item at the specified index from the list.
 * Returns undefined if the list is empty.
 * @param index
 * @returns {*}
 */
 Denque.prototype.removeOne = function removeOne(index) {
  var i = index;
  // expect a number or return undefined
  if ((i !== (i | 0))) {
    return void 0;
  }
  if (this._head === this._tail) return void 0;
  var size = this.size();
  var len = this._list.length;
  if (i >= size || i < -size) return void 0;
  if (i < 0) i += size;
  i = (this._head + i) & this._capacityMask;
  var item = this._list[i];
  var k;
  if (index < size / 2) {
    for (k = index; k > 0; k--) {
      this._list[i] = this._list[i = (i - 1 + len) & this._capacityMask];
    }
    this._list[i] = void 0;
    this._head = (this._head + 1 + len) & this._capacityMask;
  } else {
    for (k = size - 1 - index; k > 0; k--) {
      this._list[i] = this._list[i = (i + 1 + len) & this._capacityMask];
    }
    this._list[i] = void 0;
    this._tail = (this._tail - 1 + len) & this._capacityMask;
  }
  return item;
 };
 /**
 * Remove number of items from the specified index from the list.
 * Returns array of removed items.
 * Returns undefined if the list is empty.
 * @param index
 * @param count
 * @returns {array}
 */
 Denque.prototype.remove = function remove(index, count) {
  var i = index;
  var removed;
  var del_count = count;
  // expect a number or return undefined
  if ((i !== (i | 0))) {
    return void 0;
  }
  if (this._head === this._tail) return void 0;
  var size = this.size();
  var len = this._list.length;
  if (i >= size || i < -size || count < 1) return void 0;
  if (i < 0) i += size;
  if (count === 1 || !count) {
    removed = new Array(1);
    removed[0] = this.removeOne(i);
    return removed;
  }
  if (i === 0 && i + count >= size) {
    removed = this.toArray();
    this.clear();
    return removed;
  }
  if (i + count > size) count = size - i;
  var k;
  removed = new Array(count);
  for (k = 0; k < count; k++) {
    removed[k] = this._list[(this._head + i + k) & this._capacityMask];
  }
  i = (this._head + i) & this._capacityMask;
  if (index + count === size) {
    this._tail = (this._tail - count + len) & this._capacityMask;
    for (k = count; k > 0; k--) {
      this._list[i = (i + 1 + len) & this._capacityMask] = void 0;
    }
    return removed;
  }
  if (index === 0) {
    this._head = (this._head + count + len) & this._capacityMask;
    for (k = count - 1; k > 0; k--) {
      this._list[i = (i + 1 + len) & this._capacityMask] = void 0;
    }
    return removed;
  }
  if (i < size / 2) {
    this._head = (this._head + index + count + len) & this._capacityMask;
    for (k = index; k > 0; k--) {
      this.unshift(this._list[i = (i - 1 + len) & this._capacityMask]);
    }
    i = (this._head - 1 + len) & this._capacityMask;
    while (del_count > 0) {
      this._list[i = (i - 1 + len) & this._capacityMask] = void 0;
      del_count--;
    }
    if (index < 0) this._tail = i;
  } else {
    this._tail = i;
    i = (i + count + len) & this._capacityMask;
    for (k = size - (count + index); k > 0; k--) {
      this.push(this._list[i++]);
    }
    i = this._tail;
    while (del_count > 0) {
      this._list[i = (i + 1 + len) & this._capacityMask] = void 0;
      del_count--;
    }
  }
  if (this._head < 2 && this._tail > 10000 && this._tail <= len >>> 2) this._shrinkArray();
  return removed;
 };
 /**
 * Native splice implementation.
 * Remove number of items from the specified index from the list and/or add new elements.
 * Returns array of removed items or empty array if count == 0.
 * Returns undefined if the list is empty.
 *
 * @param index
 * @param count
 * @param {...*} [elements]
 * @returns {array}
 */
 Denque.prototype.splice = function splice(index, count) {
  var i = index;
  // expect a number or return undefined
  if ((i !== (i | 0))) {
    return void 0;
  }
  var size = this.size();
  if (i < 0) i += size;
  if (i > size) return void 0;
  if (arguments.length > 2) {
    var k;
    var temp;
    var removed;
    var arg_len = arguments.length;
    var len = this._list.length;
    var arguments_index = 2;
    if (!size || i < size / 2) {
      temp = new Array(i);
      for (k = 0; k < i; k++) {
        temp[k] = this._list[(this._head + k) & this._capacityMask];
      }
      if (count === 0) {
        removed = [];
        if (i > 0) {
          this._head = (this._head + i + len) & this._capacityMask;
        }
      } else {
        removed = this.remove(i, count);
        this._head = (this._head + i + len) & this._capacityMask;
      }
      while (arg_len > arguments_index) {
        this.unshift(arguments[--arg_len]);
      }
      for (k = i; k > 0; k--) {
        this.unshift(temp[k - 1]);
      }
    } else {
      temp = new Array(size - (i + count));
      var leng = temp.length;
      for (k = 0; k < leng; k++) {
        temp[k] = this._list[(this._head + i + count + k) & this._capacityMask];
      }
      if (count === 0) {
        removed = [];
        if (i != size) {
          this._tail = (this._head + i + len) & this._capacityMask;
        }
      } else {
        removed = this.remove(i, count);
        this._tail = (this._tail - leng + len) & this._capacityMask;
      }
      while (arguments_index < arg_len) {
        this.push(arguments[arguments_index++]);
      }
      for (k = 0; k < leng; k++) {
        this.push(temp[k]);
      }
    }
    return removed;
  } else {
    return this.remove(i, count);
  }
 };
 /**
 * Soft clear - does not reset capacity.
 */
 Denque.prototype.clear = function clear() {
  this._list = new Array(this._list.length);
  this._head = 0;
  this._tail = 0;
 };
 /**
 * Returns true or false whether the list is empty.
 * @returns {boolean}
 */
 Denque.prototype.isEmpty = function isEmpty() {
  return this._head === this._tail;
 };
 /**
 * Returns an array of all queue items.
 * @returns {Array}
 */
 Denque.prototype.toArray = function toArray() {
  return this._copyArray(false);
 };
 /**
 * -------------
 *   INTERNALS
 * -------------
 */
 /**
 * Fills the queue with items from an array
 * For use in the constructor
 * @param array
 * @private
 */
 Denque.prototype._fromArray = function _fromArray(array) {
  var length = array.length;
  var capacity = this._nextPowerOf2(length);
  this._list = new Array(capacity);
  this._capacityMask = capacity - 1;
  this._tail = length;
  for (var i = 0; i < length; i++) this._list[i] = array[i];
 };
 /**
 *
 * @param fullCopy
 * @param size Initialize the array with a specific size. Will default to the current list size
 * @returns {Array}
 * @private
 */
 Denque.prototype._copyArray = function _copyArray(fullCopy, size) {
  var src = this._list;
  var capacity = src.length;
  var length = this.length;
  size = size | length;
  // No prealloc requested and the buffer is contiguous
  if (size == length && this._head < this._tail) {
    // Simply do a fast slice copy
    return this._list.slice(this._head, this._tail);
  }
  var dest = new Array(size);
  var k = 0;
  var i;
  if (fullCopy || this._head > this._tail) {
    for (i = this._head; i < capacity; i++) dest[k++] = src[i];
    for (i = 0; i < this._tail; i++) dest[k++] = src[i];
  } else {
    for (i = this._head; i < this._tail; i++) dest[k++] = src[i];
  }
  return dest;
 }
 /**
 * Grows the internal list array.
 * @private
 */
 Denque.prototype._growArray = function _growArray() {
  if (this._head != 0) {
    // double array size and copy existing data, head to end, then beginning to tail.
    var newList = this._copyArray(true, this._list.length << 1);
    this._tail = this._list.length;
    this._head = 0;
    this._list = newList;
  } else {
    this._tail = this._list.length;
    this._list.length <<= 1;
  }
  this._capacityMask = (this._capacityMask << 1) | 1;
 };
 /**
 * Shrinks the internal list array.
 * @private
 */
 Denque.prototype._shrinkArray = function _shrinkArray() {
  this._list.length >>>= 1;
  this._capacityMask >>>= 1;
 };
 /**
 * Find the next power of 2, at least 4
 * @private
 * @param {number} num 
 * @returns {number}
 */
 Denque.prototype._nextPowerOf2 = function _nextPowerOf2(num) {
  var log2 = Math.log(num) / Math.log(2);
  var nextPow2 = 1 << (log2 + 1);
  return Math.max(nextPow2, 4);
 }
 module.exports = Denque;
--- a/backend/node_modules/denque/package.json
+++ b/backend/node_modules/denque/package.json
@@ -0,0 +1,58 @@
 {
  "name": "denque",
  "version": "2.1.0",
  "description": "The fastest javascript implementation of a double-ended queue. Used by the official Redis, MongoDB, MariaDB & MySQL libraries for Node.js and many other libraries. Maintains compatability with deque.",
  "main": "index.js",
  "engines": {
    "node": ">=0.10"
  },
  "keywords": [
    "data-structure",
    "data-structures",
    "queue",
    "double",
    "end",
    "ended",
    "deque",
    "denque",
    "double-ended-queue"
  ],
  "scripts": {
    "test": "istanbul cover --report lcov _mocha && npm run typescript",
    "coveralls": "cat ./coverage/lcov.info | coveralls",
    "typescript": "tsc --project ./test/type/tsconfig.json",
    "benchmark_thousand": "node benchmark/thousand",
    "benchmark_2mil": "node benchmark/two_million",
    "benchmark_splice": "node benchmark/splice",
    "benchmark_remove": "node benchmark/remove",
    "benchmark_removeOne": "node benchmark/removeOne",
    "benchmark_growth": "node benchmark/growth",
    "benchmark_toArray": "node benchmark/toArray",
    "benchmark_fromArray": "node benchmark/fromArray"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/invertase/denque.git"
  },
  "license": "Apache-2.0",
  "author": {
    "name": "Invertase",
    "email": "oss@invertase.io",
    "url": "http://github.com/invertase/"
  },
  "contributors": [
    "Mike Diarmid (Salakar) <mike@invertase.io>"
  ],
  "bugs": {
    "url": "https://github.com/invertase/denque/issues"
  },
  "homepage": "https://docs.page/invertase/denque",
  "devDependencies": {
    "benchmark": "^2.1.4",
    "codecov": "^3.8.3",
    "double-ended-queue": "^2.1.0-0",
    "istanbul": "^0.4.5",
    "mocha": "^3.5.3",
    "typescript": "^3.4.1"
  }
 }
--- a/backend/node_modules/ioredis/LICENSE
+++ b/backend/node_modules/ioredis/LICENSE
@@ -0,0 +1,21 @@
 The MIT License (MIT)
 Copyright (c) 2015-2022 Zihua Li
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
--- a/backend/node_modules/ioredis/README.md
+++ b/backend/node_modules/ioredis/README.md
--- a/backend/node_modules/ioredis/built/Command.d.ts
+++ b/backend/node_modules/ioredis/built/Command.d.ts
@@ -0,0 +1,165 @@
 /// <reference types="node" />
 import { Callback, Respondable, CommandParameter } from "./types";
 export declare type ArgumentType = string | Buffer | number | (string | Buffer | number | any[])[];
 interface CommandOptions {
    /**
     * Set the encoding of the reply, by default buffer will be returned.
     */
    replyEncoding?: BufferEncoding | null;
    errorStack?: Error;
    keyPrefix?: string;
    /**
     * Force the command to be readOnly so it will also execute on slaves
     */
    readOnly?: boolean;
 }
 declare type ArgumentTransformer = (args: any[]) => any[];
 declare type ReplyTransformer = (reply: any) => any;
 export interface CommandNameFlags {
    VALID_IN_SUBSCRIBER_MODE: [
        "subscribe",
        "psubscribe",
        "unsubscribe",
        "punsubscribe",
        "ssubscribe",
        "sunsubscribe",
        "ping",
        "quit"
    ];
    VALID_IN_MONITOR_MODE: ["monitor", "auth"];
    ENTER_SUBSCRIBER_MODE: ["subscribe", "psubscribe", "ssubscribe"];
    EXIT_SUBSCRIBER_MODE: ["unsubscribe", "punsubscribe", "sunsubscribe"];
    WILL_DISCONNECT: ["quit"];
    HANDSHAKE_COMMANDS: ["auth", "select", "client", "readonly", "info"];
    IGNORE_RECONNECT_ON_ERROR: ["client"];
    BLOCKING_COMMANDS: [
        "blpop",
        "brpop",
        "brpoplpush",
        "blmove",
        "bzpopmin",
        "bzpopmax",
        "bzmpop",
        "blmpop",
        "xread",
        "xreadgroup"
    ];
    LAST_ARG_TIMEOUT_COMMANDS: [
        "blpop",
        "brpop",
        "brpoplpush",
        "blmove",
        "bzpopmin",
        "bzpopmax"
    ];
    FIRST_ARG_TIMEOUT_COMMANDS: ["bzmpop", "blmpop"];
    BLOCK_OPTION_COMMANDS: ["xread", "xreadgroup"];
 }
 /**
 * Command instance
 *
 * It's rare that you need to create a Command instance yourself.
 *
 * ```js
 * var infoCommand = new Command('info', null, function (err, result) {
 *   console.log('result', result);
 * });
 *
 * redis.sendCommand(infoCommand);
 *
 * // When no callback provided, Command instance will have a `promise` property,
 * // which will resolve/reject with the result of the command.
 * var getCommand = new Command('get', ['foo']);
 * getCommand.promise.then(function (result) {
 *   console.log('result', result);
 * });
 * ```
 */
 export default class Command implements Respondable {
    name: string;
    static FLAGS: {
        [key in keyof CommandNameFlags]: CommandNameFlags[key];
    };
    private static flagMap?;
    private static _transformer;
    /**
     * Check whether the command has the flag
     */
    static checkFlag<T extends keyof CommandNameFlags>(flagName: T, commandName: string): commandName is CommandNameFlags[T][number];
    static setArgumentTransformer(name: string, func: ArgumentTransformer): void;
    static setReplyTransformer(name: string, func: ReplyTransformer): void;
    private static getFlagMap;
    ignore?: boolean;
    isReadOnly?: boolean;
    args: CommandParameter[];
    inTransaction: boolean;
    pipelineIndex?: number;
    isResolved: boolean;
    reject: (err: Error) => void;
    resolve: (result: any) => void;
    promise: Promise<any>;
    private replyEncoding;
    private errorStack;
    private bufferMode;
    private callback;
    private transformed;
    private _commandTimeoutTimer?;
    private _blockingTimeoutTimer?;
    private _blockingDeadline?;
    private slot?;
    private keys?;
    /**
     * Creates an instance of Command.
     * @param name Command name
     * @param args An array of command arguments
     * @param options
     * @param callback The callback that handles the response.
     * If omit, the response will be handled via Promise
     */
    constructor(name: string, args?: Array<ArgumentType>, options?: CommandOptions, callback?: Callback);
    getSlot(): number;
    getKeys(): Array<string | Buffer>;
    /**
     * Convert command to writable buffer or string
     */
    toWritable(_socket: object): string | Buffer;
    stringifyArguments(): void;
    /**
     * Convert buffer/buffer[] to string/string[],
     * and apply reply transformer.
     */
    transformReply(result: Buffer | Buffer[]): string | string[] | Buffer | Buffer[];
    /**
     * Set the wait time before terminating the attempt to execute a command
     * and generating an error.
     */
    setTimeout(ms: number): void;
    /**
     * Set a timeout for blocking commands.
     * When the timeout expires, the command resolves with null (matching Redis behavior).
     * This handles the case of undetectable network failures (e.g., docker network disconnect)
     * where the TCP connection becomes a zombie and no close event fires.
     */
    setBlockingTimeout(ms: number): void;
    /**
     * Extract the blocking timeout from the command arguments.
     *
     * @returns The timeout in seconds, null for indefinite blocking (timeout of 0),
     *          or undefined if this is not a blocking command
     */
    extractBlockingTimeout(): number | null | undefined;
    /**
     * Clear the command and blocking timers
     */
    private _clearTimers;
    private initPromise;
    /**
     * Iterate through the command arguments that are considered keys.
     */
    private _iterateKeys;
    /**
     * Convert the value from buffer to the target encoding.
     */
    private _convertValue;
 }
 export {};
--- a/backend/node_modules/ioredis/built/Command.js
+++ b/backend/node_modules/ioredis/built/Command.js
@@ -0,0 +1,449 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const commands_1 = require("@ioredis/commands");
 const calculateSlot = require("cluster-key-slot");
 const standard_as_callback_1 = require("standard-as-callback");
 const utils_1 = require("./utils");
 const argumentParsers_1 = require("./utils/argumentParsers");
 /**
 * Command instance
 *
 * It's rare that you need to create a Command instance yourself.
 *
 * ```js
 * var infoCommand = new Command('info', null, function (err, result) {
 *   console.log('result', result);
 * });
 *
 * redis.sendCommand(infoCommand);
 *
 * // When no callback provided, Command instance will have a `promise` property,
 * // which will resolve/reject with the result of the command.
 * var getCommand = new Command('get', ['foo']);
 * getCommand.promise.then(function (result) {
 *   console.log('result', result);
 * });
 * ```
 */
 class Command {
    /**
     * Creates an instance of Command.
     * @param name Command name
     * @param args An array of command arguments
     * @param options
     * @param callback The callback that handles the response.
     * If omit, the response will be handled via Promise
     */
    constructor(name, args = [], options = {}, callback) {
        this.name = name;
        this.inTransaction = false;
        this.isResolved = false;
        this.transformed = false;
        this.replyEncoding = options.replyEncoding;
        this.errorStack = options.errorStack;
        this.args = args.flat();
        this.callback = callback;
        this.initPromise();
        if (options.keyPrefix) {
            // @ts-expect-error
            const isBufferKeyPrefix = options.keyPrefix instanceof Buffer;
            // @ts-expect-error
            let keyPrefixBuffer = isBufferKeyPrefix
                ? options.keyPrefix
                : null;
            this._iterateKeys((key) => {
                if (key instanceof Buffer) {
                    if (keyPrefixBuffer === null) {
                        keyPrefixBuffer = Buffer.from(options.keyPrefix);
                    }
                    return Buffer.concat([keyPrefixBuffer, key]);
                }
                else if (isBufferKeyPrefix) {
                    // @ts-expect-error
                    return Buffer.concat([options.keyPrefix, Buffer.from(String(key))]);
                }
                return options.keyPrefix + key;
            });
        }
        if (options.readOnly) {
            this.isReadOnly = true;
        }
    }
    /**
     * Check whether the command has the flag
     */
    static checkFlag(flagName, commandName) {
        commandName = commandName.toLowerCase();
        return !!this.getFlagMap()[flagName][commandName];
    }
    static setArgumentTransformer(name, func) {
        this._transformer.argument[name] = func;
    }
    static setReplyTransformer(name, func) {
        this._transformer.reply[name] = func;
    }
    static getFlagMap() {
        if (!this.flagMap) {
            this.flagMap = Object.keys(Command.FLAGS).reduce((map, flagName) => {
                map[flagName] = {};
                Command.FLAGS[flagName].forEach((commandName) => {
                    map[flagName][commandName] = true;
                });
                return map;
            }, {});
        }
        return this.flagMap;
    }
    getSlot() {
        if (typeof this.slot === "undefined") {
            const key = this.getKeys()[0];
            this.slot = key == null ? null : calculateSlot(key);
        }
        return this.slot;
    }
    getKeys() {
        return this._iterateKeys();
    }
    /**
     * Convert command to writable buffer or string
     */
    toWritable(_socket) {
        let result;
        const commandStr = "*" +
            (this.args.length + 1) +
            "\r\n$" +
            Buffer.byteLength(this.name) +
            "\r\n" +
            this.name +
            "\r\n";
        if (this.bufferMode) {
            const buffers = new MixedBuffers();
            buffers.push(commandStr);
            for (let i = 0; i < this.args.length; ++i) {
                const arg = this.args[i];
                if (arg instanceof Buffer) {
                    if (arg.length === 0) {
                        buffers.push("$0\r\n\r\n");
                    }
                    else {
                        buffers.push("$" + arg.length + "\r\n");
                        buffers.push(arg);
                        buffers.push("\r\n");
                    }
                }
                else {
                    buffers.push("$" +
                        Buffer.byteLength(arg) +
                        "\r\n" +
                        arg +
                        "\r\n");
                }
            }
            result = buffers.toBuffer();
        }
        else {
            result = commandStr;
            for (let i = 0; i < this.args.length; ++i) {
                const arg = this.args[i];
                result +=
                    "$" +
                        Buffer.byteLength(arg) +
                        "\r\n" +
                        arg +
                        "\r\n";
            }
        }
        return result;
    }
    stringifyArguments() {
        for (let i = 0; i < this.args.length; ++i) {
            const arg = this.args[i];
            if (typeof arg === "string") {
                // buffers and strings don't need any transformation
            }
            else if (arg instanceof Buffer) {
                this.bufferMode = true;
            }
            else {
                this.args[i] = (0, utils_1.toArg)(arg);
            }
        }
    }
    /**
     * Convert buffer/buffer[] to string/string[],
     * and apply reply transformer.
     */
    transformReply(result) {
        if (this.replyEncoding) {
            result = (0, utils_1.convertBufferToString)(result, this.replyEncoding);
        }
        const transformer = Command._transformer.reply[this.name];
        if (transformer) {
            result = transformer(result);
        }
        return result;
    }
    /**
     * Set the wait time before terminating the attempt to execute a command
     * and generating an error.
     */
    setTimeout(ms) {
        if (!this._commandTimeoutTimer) {
            this._commandTimeoutTimer = setTimeout(() => {
                if (!this.isResolved) {
                    this.reject(new Error("Command timed out"));
                }
            }, ms);
        }
    }
    /**
     * Set a timeout for blocking commands.
     * When the timeout expires, the command resolves with null (matching Redis behavior).
     * This handles the case of undetectable network failures (e.g., docker network disconnect)
     * where the TCP connection becomes a zombie and no close event fires.
     */
    setBlockingTimeout(ms) {
        if (ms <= 0) {
            return;
        }
        // Clear existing timer if any (can happen when command moves from offline to command queue)
        if (this._blockingTimeoutTimer) {
            clearTimeout(this._blockingTimeoutTimer);
            this._blockingTimeoutTimer = undefined;
        }
        const now = Date.now();
        // First call: establish absolute deadline
        if (this._blockingDeadline === undefined) {
            this._blockingDeadline = now + ms;
        }
        // Check if we've already exceeded the deadline
        const remaining = this._blockingDeadline - now;
        if (remaining <= 0) {
            // Resolve with null to indicate timeout (same as Redis behavior)
            this.resolve(null);
            return;
        }
        this._blockingTimeoutTimer = setTimeout(() => {
            if (this.isResolved) {
                this._blockingTimeoutTimer = undefined;
                return;
            }
            this._blockingTimeoutTimer = undefined;
            // Timeout expired - resolve with null (same as Redis behavior when blocking command times out)
            this.resolve(null);
        }, remaining);
    }
    /**
     * Extract the blocking timeout from the command arguments.
     *
     * @returns The timeout in seconds, null for indefinite blocking (timeout of 0),
     *          or undefined if this is not a blocking command
     */
    extractBlockingTimeout() {
        const args = this.args;
        if (!args || args.length === 0) {
            return undefined;
        }
        const name = this.name.toLowerCase();
        if (Command.checkFlag("LAST_ARG_TIMEOUT_COMMANDS", name)) {
            return (0, argumentParsers_1.parseSecondsArgument)(args[args.length - 1]);
        }
        if (Command.checkFlag("FIRST_ARG_TIMEOUT_COMMANDS", name)) {
            return (0, argumentParsers_1.parseSecondsArgument)(args[0]);
        }
        if (Command.checkFlag("BLOCK_OPTION_COMMANDS", name)) {
            return (0, argumentParsers_1.parseBlockOption)(args);
        }
        return undefined;
    }
    /**
     * Clear the command and blocking timers
     */
    _clearTimers() {
        const existingTimer = this._commandTimeoutTimer;
        if (existingTimer) {
            clearTimeout(existingTimer);
            delete this._commandTimeoutTimer;
        }
        const blockingTimer = this._blockingTimeoutTimer;
        if (blockingTimer) {
            clearTimeout(blockingTimer);
            delete this._blockingTimeoutTimer;
        }
    }
    initPromise() {
        const promise = new Promise((resolve, reject) => {
            if (!this.transformed) {
                this.transformed = true;
                const transformer = Command._transformer.argument[this.name];
                if (transformer) {
                    this.args = transformer(this.args);
                }
                this.stringifyArguments();
            }
            this.resolve = this._convertValue(resolve);
            this.reject = (err) => {
                this._clearTimers();
                if (this.errorStack) {
                    reject((0, utils_1.optimizeErrorStack)(err, this.errorStack.stack, __dirname));
                }
                else {
                    reject(err);
                }
            };
        });
        this.promise = (0, standard_as_callback_1.default)(promise, this.callback);
    }
    /**
     * Iterate through the command arguments that are considered keys.
     */
    _iterateKeys(transform = (key) => key) {
        if (typeof this.keys === "undefined") {
            this.keys = [];
            if ((0, commands_1.exists)(this.name, { caseInsensitive: true })) {
                // @ts-expect-error
                const keyIndexes = (0, commands_1.getKeyIndexes)(this.name, this.args, {
                    nameCaseInsensitive: true,
                });
                for (const index of keyIndexes) {
                    this.args[index] = transform(this.args[index]);
                    this.keys.push(this.args[index]);
                }
            }
        }
        return this.keys;
    }
    /**
     * Convert the value from buffer to the target encoding.
     */
    _convertValue(resolve) {
        return (value) => {
            try {
                this._clearTimers();
                resolve(this.transformReply(value));
                this.isResolved = true;
            }
            catch (err) {
                this.reject(err);
            }
            return this.promise;
        };
    }
 }
 exports.default = Command;
 Command.FLAGS = {
    VALID_IN_SUBSCRIBER_MODE: [
        "subscribe",
        "psubscribe",
        "unsubscribe",
        "punsubscribe",
        "ssubscribe",
        "sunsubscribe",
        "ping",
        "quit",
    ],
    VALID_IN_MONITOR_MODE: ["monitor", "auth"],
    ENTER_SUBSCRIBER_MODE: ["subscribe", "psubscribe", "ssubscribe"],
    EXIT_SUBSCRIBER_MODE: ["unsubscribe", "punsubscribe", "sunsubscribe"],
    WILL_DISCONNECT: ["quit"],
    HANDSHAKE_COMMANDS: ["auth", "select", "client", "readonly", "info"],
    IGNORE_RECONNECT_ON_ERROR: ["client"],
    BLOCKING_COMMANDS: [
        "blpop",
        "brpop",
        "brpoplpush",
        "blmove",
        "bzpopmin",
        "bzpopmax",
        "bzmpop",
        "blmpop",
        "xread",
        "xreadgroup",
    ],
    LAST_ARG_TIMEOUT_COMMANDS: [
        "blpop",
        "brpop",
        "brpoplpush",
        "blmove",
        "bzpopmin",
        "bzpopmax",
    ],
    FIRST_ARG_TIMEOUT_COMMANDS: ["bzmpop", "blmpop"],
    BLOCK_OPTION_COMMANDS: ["xread", "xreadgroup"],
 };
 Command._transformer = {
    argument: {},
    reply: {},
 };
 const msetArgumentTransformer = function (args) {
    if (args.length === 1) {
        if (args[0] instanceof Map) {
            return (0, utils_1.convertMapToArray)(args[0]);
        }
        if (typeof args[0] === "object" && args[0] !== null) {
            return (0, utils_1.convertObjectToArray)(args[0]);
        }
    }
    return args;
 };
 const hsetArgumentTransformer = function (args) {
    if (args.length === 2) {
        if (args[1] instanceof Map) {
            return [args[0]].concat((0, utils_1.convertMapToArray)(args[1]));
        }
        if (typeof args[1] === "object" && args[1] !== null) {
            return [args[0]].concat((0, utils_1.convertObjectToArray)(args[1]));
        }
    }
    return args;
 };
 Command.setArgumentTransformer("mset", msetArgumentTransformer);
 Command.setArgumentTransformer("msetnx", msetArgumentTransformer);
 Command.setArgumentTransformer("hset", hsetArgumentTransformer);
 Command.setArgumentTransformer("hmset", hsetArgumentTransformer);
 Command.setReplyTransformer("hgetall", function (result) {
    if (Array.isArray(result)) {
        const obj = {};
        for (let i = 0; i < result.length; i += 2) {
            const key = result[i];
            const value = result[i + 1];
            if (key in obj) {
                // can only be truthy if the property is special somehow, like '__proto__' or 'constructor'
                // https://github.com/luin/ioredis/issues/1267
                Object.defineProperty(obj, key, {
                    value,
                    configurable: true,
                    enumerable: true,
                    writable: true,
                });
            }
            else {
                obj[key] = value;
            }
        }
        return obj;
    }
    return result;
 });
 class MixedBuffers {
    constructor() {
        this.length = 0;
        this.items = [];
    }
    push(x) {
        this.length += Buffer.byteLength(x);
        this.items.push(x);
    }
    toBuffer() {
        const result = Buffer.allocUnsafe(this.length);
        let offset = 0;
        for (const item of this.items) {
            const length = Buffer.byteLength(item);
            Buffer.isBuffer(item)
                ? item.copy(result, offset)
                : result.write(item, offset, length);
            offset += length;
        }
        return result;
    }
 }
--- a/backend/node_modules/ioredis/built/DataHandler.d.ts
+++ b/backend/node_modules/ioredis/built/DataHandler.d.ts
@@ -0,0 +1,37 @@
 /// <reference types="node" />
 import { NetStream, CommandItem } from "./types";
 import Deque = require("denque");
 import { EventEmitter } from "events";
 import SubscriptionSet from "./SubscriptionSet";
 export interface Condition {
    select: number;
    auth?: string | [string, string];
    subscriber: false | SubscriptionSet;
 }
 export declare type FlushQueueOptions = {
    offlineQueue?: boolean;
    commandQueue?: boolean;
 };
 export interface DataHandledable extends EventEmitter {
    stream: NetStream;
    status: string;
    condition: Condition | null;
    commandQueue: Deque<CommandItem>;
    disconnect(reconnect: boolean): void;
    recoverFromFatalError(commandError: Error, err: Error, options: FlushQueueOptions): void;
    handleReconnection(err: Error, item: CommandItem): void;
 }
 interface ParserOptions {
    stringNumbers: boolean;
 }
 export default class DataHandler {
    private redis;
    constructor(redis: DataHandledable, parserOptions: ParserOptions);
    private returnFatalError;
    private returnError;
    private returnReply;
    private handleSubscriberReply;
    private handleMonitorReply;
    private shiftCommand;
 }
 export {};
--- a/backend/node_modules/ioredis/built/DataHandler.js
+++ b/backend/node_modules/ioredis/built/DataHandler.js
@@ -0,0 +1,224 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const Command_1 = require("./Command");
 const utils_1 = require("./utils");
 const RedisParser = require("redis-parser");
 const SubscriptionSet_1 = require("./SubscriptionSet");
 const debug = (0, utils_1.Debug)("dataHandler");
 class DataHandler {
    constructor(redis, parserOptions) {
        this.redis = redis;
        const parser = new RedisParser({
            stringNumbers: parserOptions.stringNumbers,
            returnBuffers: true,
            returnError: (err) => {
                this.returnError(err);
            },
            returnFatalError: (err) => {
                this.returnFatalError(err);
            },
            returnReply: (reply) => {
                this.returnReply(reply);
            },
        });
        // prependListener ensures the parser receives and processes data before socket timeout checks are performed
        redis.stream.prependListener("data", (data) => {
            parser.execute(data);
        });
        // prependListener() doesn't enable flowing mode automatically - we need to resume the stream manually
        redis.stream.resume();
    }
    returnFatalError(err) {
        err.message += ". Please report this.";
        this.redis.recoverFromFatalError(err, err, { offlineQueue: false });
    }
    returnError(err) {
        const item = this.shiftCommand(err);
        if (!item) {
            return;
        }
        err.command = {
            name: item.command.name,
            args: item.command.args,
        };
        if (item.command.name == "ssubscribe" && err.message.includes("MOVED")) {
            this.redis.emit("moved");
            return;
        }
        this.redis.handleReconnection(err, item);
    }
    returnReply(reply) {
        if (this.handleMonitorReply(reply)) {
            return;
        }
        if (this.handleSubscriberReply(reply)) {
            return;
        }
        const item = this.shiftCommand(reply);
        if (!item) {
            return;
        }
        if (Command_1.default.checkFlag("ENTER_SUBSCRIBER_MODE", item.command.name)) {
            this.redis.condition.subscriber = new SubscriptionSet_1.default();
            this.redis.condition.subscriber.add(item.command.name, reply[1].toString());
            if (!fillSubCommand(item.command, reply[2])) {
                this.redis.commandQueue.unshift(item);
            }
        }
        else if (Command_1.default.checkFlag("EXIT_SUBSCRIBER_MODE", item.command.name)) {
            if (!fillUnsubCommand(item.command, reply[2])) {
                this.redis.commandQueue.unshift(item);
            }
        }
        else {
            item.command.resolve(reply);
        }
    }
    handleSubscriberReply(reply) {
        if (!this.redis.condition.subscriber) {
            return false;
        }
        const replyType = Array.isArray(reply) ? reply[0].toString() : null;
        debug('receive reply "%s" in subscriber mode', replyType);
        switch (replyType) {
            case "message":
                if (this.redis.listeners("message").length > 0) {
                    // Check if there're listeners to avoid unnecessary `toString()`.
                    this.redis.emit("message", reply[1].toString(), reply[2] ? reply[2].toString() : "");
                }
                this.redis.emit("messageBuffer", reply[1], reply[2]);
                break;
            case "pmessage": {
                const pattern = reply[1].toString();
                if (this.redis.listeners("pmessage").length > 0) {
                    this.redis.emit("pmessage", pattern, reply[2].toString(), reply[3].toString());
                }
                this.redis.emit("pmessageBuffer", pattern, reply[2], reply[3]);
                break;
            }
            case "smessage": {
                if (this.redis.listeners("smessage").length > 0) {
                    this.redis.emit("smessage", reply[1].toString(), reply[2] ? reply[2].toString() : "");
                }
                this.redis.emit("smessageBuffer", reply[1], reply[2]);
                break;
            }
            case "ssubscribe":
            case "subscribe":
            case "psubscribe": {
                const channel = reply[1].toString();
                this.redis.condition.subscriber.add(replyType, channel);
                const item = this.shiftCommand(reply);
                if (!item) {
                    return;
                }
                if (!fillSubCommand(item.command, reply[2])) {
                    this.redis.commandQueue.unshift(item);
                }
                break;
            }
            case "sunsubscribe":
            case "unsubscribe":
            case "punsubscribe": {
                const channel = reply[1] ? reply[1].toString() : null;
                if (channel) {
                    this.redis.condition.subscriber.del(replyType, channel);
                }
                const count = reply[2];
                if (Number(count) === 0) {
                    this.redis.condition.subscriber = false;
                }
                const item = this.shiftCommand(reply);
                if (!item) {
                    return;
                }
                if (!fillUnsubCommand(item.command, count)) {
                    this.redis.commandQueue.unshift(item);
                }
                break;
            }
            default: {
                const item = this.shiftCommand(reply);
                if (!item) {
                    return;
                }
                item.command.resolve(reply);
            }
        }
        return true;
    }
    handleMonitorReply(reply) {
        if (this.redis.status !== "monitoring") {
            return false;
        }
        const replyStr = reply.toString();
        if (replyStr === "OK") {
            // Valid commands in the monitoring mode are AUTH and MONITOR,
            // both of which always reply with 'OK'.
            // So if we got an 'OK', we can make certain that
            // the reply is made to AUTH & MONITOR.
            return false;
        }
        // Since commands sent in the monitoring mode will trigger an exception,
        // any replies we received in the monitoring mode should consider to be
        // realtime monitor data instead of result of commands.
        const len = replyStr.indexOf(" ");
        const timestamp = replyStr.slice(0, len);
        const argIndex = replyStr.indexOf('"');
        const args = replyStr
            .slice(argIndex + 1, -1)
            .split('" "')
            .map((elem) => elem.replace(/\\"/g, '"'));
        const dbAndSource = replyStr.slice(len + 2, argIndex - 2).split(" ");
        this.redis.emit("monitor", timestamp, args, dbAndSource[1], dbAndSource[0]);
        return true;
    }
    shiftCommand(reply) {
        const item = this.redis.commandQueue.shift();
        if (!item) {
            const message = "Command queue state error. If you can reproduce this, please report it.";
            const error = new Error(message +
                (reply instanceof Error
                    ? ` Last error: ${reply.message}`
                    : ` Last reply: ${reply.toString()}`));
            this.redis.emit("error", error);
            return null;
        }
        return item;
    }
 }
 exports.default = DataHandler;
 const remainingRepliesMap = new WeakMap();
 function fillSubCommand(command, count) {
    let remainingReplies = remainingRepliesMap.has(command)
        ? remainingRepliesMap.get(command)
        : command.args.length;
    remainingReplies -= 1;
    if (remainingReplies <= 0) {
        command.resolve(count);
        remainingRepliesMap.delete(command);
        return true;
    }
    remainingRepliesMap.set(command, remainingReplies);
    return false;
 }
 function fillUnsubCommand(command, count) {
    let remainingReplies = remainingRepliesMap.has(command)
        ? remainingRepliesMap.get(command)
        : command.args.length;
    if (remainingReplies === 0) {
        if (Number(count) === 0) {
            remainingRepliesMap.delete(command);
            command.resolve(count);
            return true;
        }
        return false;
    }
    remainingReplies -= 1;
    if (remainingReplies <= 0) {
        command.resolve(count);
        return true;
    }
    remainingRepliesMap.set(command, remainingReplies);
    return false;
 }
--- a/backend/node_modules/ioredis/built/Pipeline.d.ts
+++ b/backend/node_modules/ioredis/built/Pipeline.d.ts
@@ -0,0 +1,31 @@
 import Redis from "./Redis";
 import Cluster from "./cluster";
 import Command from "./Command";
 import Commander from "./utils/Commander";
 declare class Pipeline extends Commander<{
    type: "pipeline";
 }> {
    redis: Redis | Cluster;
    isCluster: boolean;
    isPipeline: boolean;
    leftRedirections: {
        value?: number;
    };
    promise: Promise<unknown>;
    resolve: (result: unknown) => void;
    reject: (error: Error) => void;
    private replyPending;
    private _queue;
    private _result;
    private _transactions;
    private _shaToScript;
    private preferKey;
    constructor(redis: Redis | Cluster);
    fillResult(value: unknown[], position: number): void;
    sendCommand(command: Command): unknown;
    addBatch(commands: any): this;
 }
 export default Pipeline;
 interface Pipeline {
    length: number;
 }
--- a/backend/node_modules/ioredis/built/Pipeline.js
+++ b/backend/node_modules/ioredis/built/Pipeline.js
@@ -0,0 +1,342 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const calculateSlot = require("cluster-key-slot");
 const commands_1 = require("@ioredis/commands");
 const standard_as_callback_1 = require("standard-as-callback");
 const util_1 = require("util");
 const Command_1 = require("./Command");
 const utils_1 = require("./utils");
 const Commander_1 = require("./utils/Commander");
 /*
  This function derives from the cluster-key-slot implementation.
  Instead of checking that all keys have the same slot, it checks that all slots are served by the same set of nodes.
  If this is satisfied, it returns the first key's slot.
 */
 function generateMultiWithNodes(redis, keys) {
    const slot = calculateSlot(keys[0]);
    const target = redis._groupsBySlot[slot];
    for (let i = 1; i < keys.length; i++) {
        if (redis._groupsBySlot[calculateSlot(keys[i])] !== target) {
            return -1;
        }
    }
    return slot;
 }
 class Pipeline extends Commander_1.default {
    constructor(redis) {
        super();
        this.redis = redis;
        this.isPipeline = true;
        this.replyPending = 0;
        this._queue = [];
        this._result = [];
        this._transactions = 0;
        this._shaToScript = {};
        this.isCluster =
            this.redis.constructor.name === "Cluster" || this.redis.isCluster;
        this.options = redis.options;
        Object.keys(redis.scriptsSet).forEach((name) => {
            const script = redis.scriptsSet[name];
            this._shaToScript[script.sha] = script;
            this[name] = redis[name];
            this[name + "Buffer"] = redis[name + "Buffer"];
        });
        redis.addedBuiltinSet.forEach((name) => {
            this[name] = redis[name];
            this[name + "Buffer"] = redis[name + "Buffer"];
        });
        this.promise = new Promise((resolve, reject) => {
            this.resolve = resolve;
            this.reject = reject;
        });
        const _this = this;
        Object.defineProperty(this, "length", {
            get: function () {
                return _this._queue.length;
            },
        });
    }
    fillResult(value, position) {
        if (this._queue[position].name === "exec" && Array.isArray(value[1])) {
            const execLength = value[1].length;
            for (let i = 0; i < execLength; i++) {
                if (value[1][i] instanceof Error) {
                    continue;
                }
                const cmd = this._queue[position - (execLength - i)];
                try {
                    value[1][i] = cmd.transformReply(value[1][i]);
                }
                catch (err) {
                    value[1][i] = err;
                }
            }
        }
        this._result[position] = value;
        if (--this.replyPending) {
            return;
        }
        if (this.isCluster) {
            let retriable = true;
            let commonError;
            for (let i = 0; i < this._result.length; ++i) {
                const error = this._result[i][0];
                const command = this._queue[i];
                if (error) {
                    if (command.name === "exec" &&
                        error.message ===
                            "EXECABORT Transaction discarded because of previous errors.") {
                        continue;
                    }
                    if (!commonError) {
                        commonError = {
                            name: error.name,
                            message: error.message,
                        };
                    }
                    else if (commonError.name !== error.name ||
                        commonError.message !== error.message) {
                        retriable = false;
                        break;
                    }
                }
                else if (!command.inTransaction) {
                    const isReadOnly = (0, commands_1.exists)(command.name, { caseInsensitive: true }) &&
                        (0, commands_1.hasFlag)(command.name, "readonly", { nameCaseInsensitive: true });
                    if (!isReadOnly) {
                        retriable = false;
                        break;
                    }
                }
            }
            if (commonError && retriable) {
                const _this = this;
                const errv = commonError.message.split(" ");
                const queue = this._queue;
                let inTransaction = false;
                this._queue = [];
                for (let i = 0; i < queue.length; ++i) {
                    if (errv[0] === "ASK" &&
                        !inTransaction &&
                        queue[i].name !== "asking" &&
                        (!queue[i - 1] || queue[i - 1].name !== "asking")) {
                        const asking = new Command_1.default("asking");
                        asking.ignore = true;
                        this.sendCommand(asking);
                    }
                    queue[i].initPromise();
                    this.sendCommand(queue[i]);
                    inTransaction = queue[i].inTransaction;
                }
                let matched = true;
                if (typeof this.leftRedirections === "undefined") {
                    this.leftRedirections = {};
                }
                const exec = function () {
                    _this.exec();
                };
                const cluster = this.redis;
                cluster.handleError(commonError, this.leftRedirections, {
                    moved: function (_slot, key) {
                        _this.preferKey = key;
                        if (cluster.slots[errv[1]]) {
                            if (cluster.slots[errv[1]][0] !== key) {
                                cluster.slots[errv[1]] = [key];
                            }
                        }
                        else {
                            cluster.slots[errv[1]] = [key];
                        }
                        cluster._groupsBySlot[errv[1]] =
                            cluster._groupsIds[cluster.slots[errv[1]].join(";")];
                        cluster.refreshSlotsCache();
                        _this.exec();
                    },
                    ask: function (_slot, key) {
                        _this.preferKey = key;
                        _this.exec();
                    },
                    tryagain: exec,
                    clusterDown: exec,
                    connectionClosed: exec,
                    maxRedirections: () => {
                        matched = false;
                    },
                    defaults: () => {
                        matched = false;
                    },
                });
                if (matched) {
                    return;
                }
            }
        }
        let ignoredCount = 0;
        for (let i = 0; i < this._queue.length - ignoredCount; ++i) {
            if (this._queue[i + ignoredCount].ignore) {
                ignoredCount += 1;
            }
            this._result[i] = this._result[i + ignoredCount];
        }
        this.resolve(this._result.slice(0, this._result.length - ignoredCount));
    }
    sendCommand(command) {
        if (this._transactions > 0) {
            command.inTransaction = true;
        }
        const position = this._queue.length;
        command.pipelineIndex = position;
        command.promise
            .then((result) => {
            this.fillResult([null, result], position);
        })
            .catch((error) => {
            this.fillResult([error], position);
        });
        this._queue.push(command);
        return this;
    }
    addBatch(commands) {
        let command, commandName, args;
        for (let i = 0; i < commands.length; ++i) {
            command = commands[i];
            commandName = command[0];
            args = command.slice(1);
            this[commandName].apply(this, args);
        }
        return this;
    }
 }
 exports.default = Pipeline;
 // @ts-expect-error
 const multi = Pipeline.prototype.multi;
 // @ts-expect-error
 Pipeline.prototype.multi = function () {
    this._transactions += 1;
    return multi.apply(this, arguments);
 };
 // @ts-expect-error
 const execBuffer = Pipeline.prototype.execBuffer;
 // @ts-expect-error
 Pipeline.prototype.execBuffer = (0, util_1.deprecate)(function () {
    if (this._transactions > 0) {
        this._transactions -= 1;
    }
    return execBuffer.apply(this, arguments);
 }, "Pipeline#execBuffer: Use Pipeline#exec instead");
 // NOTE: To avoid an unhandled promise rejection, this will unconditionally always return this.promise,
 // which always has the rejection handled by standard-as-callback
 // adding the provided rejection callback.
 //
 // If a different promise instance were returned, that promise would cause its own unhandled promise rejection
 // errors, even if that promise unconditionally resolved to **the resolved value of** this.promise.
 Pipeline.prototype.exec = function (callback) {
    // Wait for the cluster to be connected, since we need nodes information before continuing
    if (this.isCluster && !this.redis.slots.length) {
        if (this.redis.status === "wait")
            this.redis.connect().catch(utils_1.noop);
        if (callback && !this.nodeifiedPromise) {
            this.nodeifiedPromise = true;
            (0, standard_as_callback_1.default)(this.promise, callback);
        }
        this.redis.delayUntilReady((err) => {
            if (err) {
                this.reject(err);
                return;
            }
            this.exec(callback);
        });
        return this.promise;
    }
    if (this._transactions > 0) {
        this._transactions -= 1;
        return execBuffer.apply(this, arguments);
    }
    if (!this.nodeifiedPromise) {
        this.nodeifiedPromise = true;
        (0, standard_as_callback_1.default)(this.promise, callback);
    }
    if (!this._queue.length) {
        this.resolve([]);
    }
    let pipelineSlot;
    if (this.isCluster) {
        // List of the first key for each command
        const sampleKeys = [];
        for (let i = 0; i < this._queue.length; i++) {
            const keys = this._queue[i].getKeys();
            if (keys.length) {
                sampleKeys.push(keys[0]);
            }
            // For each command, check that the keys belong to the same slot
            if (keys.length && calculateSlot.generateMulti(keys) < 0) {
                this.reject(new Error("All the keys in a pipeline command should belong to the same slot"));
                return this.promise;
            }
        }
        if (sampleKeys.length) {
            pipelineSlot = generateMultiWithNodes(this.redis, sampleKeys);
            if (pipelineSlot < 0) {
                this.reject(new Error("All keys in the pipeline should belong to the same slots allocation group"));
                return this.promise;
            }
        }
        else {
            // Send the pipeline to a random node
            pipelineSlot = (Math.random() * 16384) | 0;
        }
    }
    const _this = this;
    execPipeline();
    return this.promise;
    function execPipeline() {
        let writePending = (_this.replyPending = _this._queue.length);
        let node;
        if (_this.isCluster) {
            node = {
                slot: pipelineSlot,
                redis: _this.redis.connectionPool.nodes.all[_this.preferKey],
            };
        }
        let data = "";
        let buffers;
        const stream = {
            isPipeline: true,
            destination: _this.isCluster ? node : { redis: _this.redis },
            write(writable) {
                if (typeof writable !== "string") {
                    if (!buffers) {
                        buffers = [];
                    }
                    if (data) {
                        buffers.push(Buffer.from(data, "utf8"));
                        data = "";
                    }
                    buffers.push(writable);
                }
                else {
                    data += writable;
                }
                if (!--writePending) {
                    if (buffers) {
                        if (data) {
                            buffers.push(Buffer.from(data, "utf8"));
                        }
                        stream.destination.redis.stream.write(Buffer.concat(buffers));
                    }
                    else {
                        stream.destination.redis.stream.write(data);
                    }
                    // Reset writePending for resending
                    writePending = _this._queue.length;
                    data = "";
                    buffers = undefined;
                }
            },
        };
        for (let i = 0; i < _this._queue.length; ++i) {
            _this.redis.sendCommand(_this._queue[i], stream, node);
        }
        return _this.promise;
    }
 };
--- a/backend/node_modules/ioredis/built/Redis.d.ts
+++ b/backend/node_modules/ioredis/built/Redis.d.ts
@@ -0,0 +1,232 @@
 /// <reference types="node" />
 import { EventEmitter } from "events";
 import Cluster from "./cluster";
 import Command from "./Command";
 import { DataHandledable, FlushQueueOptions, Condition } from "./DataHandler";
 import { RedisOptions } from "./redis/RedisOptions";
 import ScanStream from "./ScanStream";
 import { Transaction } from "./transaction";
 import { Callback, CommandItem, NetStream, ScanStreamOptions, WriteableStream } from "./types";
 import Commander from "./utils/Commander";
 import Deque = require("denque");
 declare type RedisStatus = "wait" | "reconnecting" | "connecting" | "connect" | "ready" | "close" | "end";
 /**
 * This is the major component of ioredis.
 * Use it to connect to a standalone Redis server or Sentinels.
 *
 * ```typescript
 * const redis = new Redis(); // Default port is 6379
 * async function main() {
 *   redis.set("foo", "bar");
 *   redis.get("foo", (err, result) => {
 *     // `result` should be "bar"
 *     console.log(err, result);
 *   });
 *   // Or use Promise
 *   const result = await redis.get("foo");
 * }
 * ```
 */
 declare class Redis extends Commander implements DataHandledable {
    static Cluster: typeof Cluster;
    static Command: typeof Command;
    /**
     * Default options
     */
    private static defaultOptions;
    /**
     * Create a Redis instance.
     * This is the same as `new Redis()` but is included for compatibility with node-redis.
     */
    static createClient(...args: ConstructorParameters<typeof Redis>): Redis;
    options: RedisOptions;
    status: RedisStatus;
    /**
     * @ignore
     */
    stream: NetStream;
    /**
     * @ignore
     */
    isCluster: boolean;
    /**
     * @ignore
     */
    condition: Condition | null;
    /**
     * @ignore
     */
    commandQueue: Deque<CommandItem>;
    private connector;
    private reconnectTimeout;
    private offlineQueue;
    private connectionEpoch;
    private retryAttempts;
    private manuallyClosing;
    private socketTimeoutTimer;
    private _autoPipelines;
    private _runningAutoPipelines;
    constructor(port: number, host: string, options: RedisOptions);
    constructor(path: string, options: RedisOptions);
    constructor(port: number, options: RedisOptions);
    constructor(port: number, host: string);
    constructor(options: RedisOptions);
    constructor(port: number);
    constructor(path: string);
    constructor();
    get autoPipelineQueueSize(): number;
    /**
     * Create a connection to Redis.
     * This method will be invoked automatically when creating a new Redis instance
     * unless `lazyConnect: true` is passed.
     *
     * When calling this method manually, a Promise is returned, which will
     * be resolved when the connection status is ready. The promise can reject
     * if the connection fails, times out, or if Redis is already connecting/connected.
     */
    connect(callback?: Callback<void>): Promise<void>;
    /**
     * Disconnect from Redis.
     *
     * This method closes the connection immediately,
     * and may lose some pending replies that haven't written to client.
     * If you want to wait for the pending replies, use Redis#quit instead.
     */
    disconnect(reconnect?: boolean): void;
    /**
     * Disconnect from Redis.
     *
     * @deprecated
     */
    end(): void;
    /**
     * Create a new instance with the same options as the current one.
     *
     * @example
     * ```js
     * var redis = new Redis(6380);
     * var anotherRedis = redis.duplicate();
     * ```
     */
    duplicate(override?: Partial<RedisOptions>): Redis;
    /**
     * Mode of the connection.
     *
     * One of `"normal"`, `"subscriber"`, or `"monitor"`. When the connection is
     * not in `"normal"` mode, certain commands are not allowed.
     */
    get mode(): "normal" | "subscriber" | "monitor";
    /**
     * Listen for all requests received by the server in real time.
     *
     * This command will create a new connection to Redis and send a
     * MONITOR command via the new connection in order to avoid disturbing
     * the current connection.
     *
     * @param callback The callback function. If omit, a promise will be returned.
     * @example
     * ```js
     * var redis = new Redis();
     * redis.monitor(function (err, monitor) {
     *   // Entering monitoring mode.
     *   monitor.on('monitor', function (time, args, source, database) {
     *     console.log(time + ": " + util.inspect(args));
     *   });
     * });
     *
     * // supports promise as well as other commands
     * redis.monitor().then(function (monitor) {
     *   monitor.on('monitor', function (time, args, source, database) {
     *     console.log(time + ": " + util.inspect(args));
     *   });
     * });
     * ```
     */
    monitor(callback?: Callback<Redis>): Promise<Redis>;
    /**
     * Send a command to Redis
     *
     * This method is used internally and in most cases you should not
     * use it directly. If you need to send a command that is not supported
     * by the library, you can use the `call` method:
     *
     * ```js
     * const redis = new Redis();
     *
     * redis.call('set', 'foo', 'bar');
     * // or
     * redis.call(['set', 'foo', 'bar']);
     * ```
     *
     * @ignore
     */
    sendCommand(command: Command, stream?: WriteableStream): unknown;
    private getBlockingTimeoutInMs;
    private getConfiguredBlockingTimeout;
    private setSocketTimeout;
    scanStream(options?: ScanStreamOptions): ScanStream;
    scanBufferStream(options?: ScanStreamOptions): ScanStream;
    sscanStream(key: string, options?: ScanStreamOptions): ScanStream;
    sscanBufferStream(key: string, options?: ScanStreamOptions): ScanStream;
    hscanStream(key: string, options?: ScanStreamOptions): ScanStream;
    hscanBufferStream(key: string, options?: ScanStreamOptions): ScanStream;
    zscanStream(key: string, options?: ScanStreamOptions): ScanStream;
    zscanBufferStream(key: string, options?: ScanStreamOptions): ScanStream;
    /**
     * Emit only when there's at least one listener.
     *
     * @ignore
     */
    silentEmit(eventName: string, arg?: unknown): boolean;
    /**
     * @ignore
     */
    recoverFromFatalError(_commandError: Error, err: Error, options: FlushQueueOptions): void;
    /**
     * @ignore
     */
    handleReconnection(err: Error, item: CommandItem): void;
    /**
     * Get description of the connection. Used for debugging.
     */
    private _getDescription;
    private resetCommandQueue;
    private resetOfflineQueue;
    private parseOptions;
    /**
     * Change instance's status
     */
    private setStatus;
    private createScanStream;
    /**
     * Flush offline queue and command queue with error.
     *
     * @param error The error object to send to the commands
     * @param options options
     */
    private flushQueue;
    /**
     * Check whether Redis has finished loading the persistent data and is able to
     * process commands.
     */
    private _readyCheck;
 }
 interface Redis extends EventEmitter {
    on(event: "message", cb: (channel: string, message: string) => void): this;
    once(event: "message", cb: (channel: string, message: string) => void): this;
    on(event: "messageBuffer", cb: (channel: Buffer, message: Buffer) => void): this;
    once(event: "messageBuffer", cb: (channel: Buffer, message: Buffer) => void): this;
    on(event: "pmessage", cb: (pattern: string, channel: string, message: string) => void): this;
    once(event: "pmessage", cb: (pattern: string, channel: string, message: string) => void): this;
    on(event: "pmessageBuffer", cb: (pattern: string, channel: Buffer, message: Buffer) => void): this;
    once(event: "pmessageBuffer", cb: (pattern: string, channel: Buffer, message: Buffer) => void): this;
    on(event: "error", cb: (error: Error) => void): this;
    once(event: "error", cb: (error: Error) => void): this;
    on(event: RedisStatus, cb: () => void): this;
    once(event: RedisStatus, cb: () => void): this;
    on(event: string | symbol, listener: (...args: any[]) => void): this;
    once(event: string | symbol, listener: (...args: any[]) => void): this;
 }
 interface Redis extends Transaction {
 }
 export default Redis;
--- a/backend/node_modules/ioredis/built/Redis.js
+++ b/backend/node_modules/ioredis/built/Redis.js
@@ -0,0 +1,745 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const commands_1 = require("@ioredis/commands");
 const events_1 = require("events");
 const standard_as_callback_1 = require("standard-as-callback");
 const cluster_1 = require("./cluster");
 const Command_1 = require("./Command");
 const connectors_1 = require("./connectors");
 const SentinelConnector_1 = require("./connectors/SentinelConnector");
 const eventHandler = require("./redis/event_handler");
 const RedisOptions_1 = require("./redis/RedisOptions");
 const ScanStream_1 = require("./ScanStream");
 const transaction_1 = require("./transaction");
 const utils_1 = require("./utils");
 const applyMixin_1 = require("./utils/applyMixin");
 const Commander_1 = require("./utils/Commander");
 const lodash_1 = require("./utils/lodash");
 const Deque = require("denque");
 const debug = (0, utils_1.Debug)("redis");
 /**
 * This is the major component of ioredis.
 * Use it to connect to a standalone Redis server or Sentinels.
 *
 * ```typescript
 * const redis = new Redis(); // Default port is 6379
 * async function main() {
 *   redis.set("foo", "bar");
 *   redis.get("foo", (err, result) => {
 *     // `result` should be "bar"
 *     console.log(err, result);
 *   });
 *   // Or use Promise
 *   const result = await redis.get("foo");
 * }
 * ```
 */
 class Redis extends Commander_1.default {
    constructor(arg1, arg2, arg3) {
        super();
        this.status = "wait";
        /**
         * @ignore
         */
        this.isCluster = false;
        this.reconnectTimeout = null;
        this.connectionEpoch = 0;
        this.retryAttempts = 0;
        this.manuallyClosing = false;
        // Prepare autopipelines structures
        this._autoPipelines = new Map();
        this._runningAutoPipelines = new Set();
        this.parseOptions(arg1, arg2, arg3);
        events_1.EventEmitter.call(this);
        this.resetCommandQueue();
        this.resetOfflineQueue();
        if (this.options.Connector) {
            this.connector = new this.options.Connector(this.options);
        }
        else if (this.options.sentinels) {
            const sentinelConnector = new SentinelConnector_1.default(this.options);
            sentinelConnector.emitter = this;
            this.connector = sentinelConnector;
        }
        else {
            this.connector = new connectors_1.StandaloneConnector(this.options);
        }
        if (this.options.scripts) {
            Object.entries(this.options.scripts).forEach(([name, definition]) => {
                this.defineCommand(name, definition);
            });
        }
        // end(or wait) -> connecting -> connect -> ready -> end
        if (this.options.lazyConnect) {
            this.setStatus("wait");
        }
        else {
            this.connect().catch(lodash_1.noop);
        }
    }
    /**
     * Create a Redis instance.
     * This is the same as `new Redis()` but is included for compatibility with node-redis.
     */
    static createClient(...args) {
        return new Redis(...args);
    }
    get autoPipelineQueueSize() {
        let queued = 0;
        for (const pipeline of this._autoPipelines.values()) {
            queued += pipeline.length;
        }
        return queued;
    }
    /**
     * Create a connection to Redis.
     * This method will be invoked automatically when creating a new Redis instance
     * unless `lazyConnect: true` is passed.
     *
     * When calling this method manually, a Promise is returned, which will
     * be resolved when the connection status is ready. The promise can reject
     * if the connection fails, times out, or if Redis is already connecting/connected.
     */
    connect(callback) {
        const promise = new Promise((resolve, reject) => {
            if (this.status === "connecting" ||
                this.status === "connect" ||
                this.status === "ready") {
                reject(new Error("Redis is already connecting/connected"));
                return;
            }
            this.connectionEpoch += 1;
            this.setStatus("connecting");
            const { options } = this;
            this.condition = {
                select: options.db,
                auth: options.username
                    ? [options.username, options.password]
                    : options.password,
                subscriber: false,
            };
            const _this = this;
            (0, standard_as_callback_1.default)(this.connector.connect(function (type, err) {
                _this.silentEmit(type, err);
            }), function (err, stream) {
                if (err) {
                    _this.flushQueue(err);
                    _this.silentEmit("error", err);
                    reject(err);
                    _this.setStatus("end");
                    return;
                }
                let CONNECT_EVENT = options.tls ? "secureConnect" : "connect";
                if ("sentinels" in options &&
                    options.sentinels &&
                    !options.enableTLSForSentinelMode) {
                    CONNECT_EVENT = "connect";
                }
                _this.stream = stream;
                if (options.noDelay) {
                    stream.setNoDelay(true);
                }
                // Node ignores setKeepAlive before connect, therefore we wait for the event:
                // https://github.com/nodejs/node/issues/31663
                if (typeof options.keepAlive === "number") {
                    if (stream.connecting) {
                        stream.once(CONNECT_EVENT, () => {
                            stream.setKeepAlive(true, options.keepAlive);
                        });
                    }
                    else {
                        stream.setKeepAlive(true, options.keepAlive);
                    }
                }
                if (stream.connecting) {
                    stream.once(CONNECT_EVENT, eventHandler.connectHandler(_this));
                    if (options.connectTimeout) {
                        /*
                         * Typically, Socket#setTimeout(0) will clear the timer
                         * set before. However, in some platforms (Electron 3.x~4.x),
                         * the timer will not be cleared. So we introduce a variable here.
                         *
                         * See https://github.com/electron/electron/issues/14915
                         */
                        let connectTimeoutCleared = false;
                        stream.setTimeout(options.connectTimeout, function () {
                            if (connectTimeoutCleared) {
                                return;
                            }
                            stream.setTimeout(0);
                            stream.destroy();
                            const err = new Error("connect ETIMEDOUT");
                            // @ts-expect-error
                            err.errorno = "ETIMEDOUT";
                            // @ts-expect-error
                            err.code = "ETIMEDOUT";
                            // @ts-expect-error
                            err.syscall = "connect";
                            eventHandler.errorHandler(_this)(err);
                        });
                        stream.once(CONNECT_EVENT, function () {
                            connectTimeoutCleared = true;
                            stream.setTimeout(0);
                        });
                    }
                }
                else if (stream.destroyed) {
                    const firstError = _this.connector.firstError;
                    if (firstError) {
                        process.nextTick(() => {
                            eventHandler.errorHandler(_this)(firstError);
                        });
                    }
                    process.nextTick(eventHandler.closeHandler(_this));
                }
                else {
                    process.nextTick(eventHandler.connectHandler(_this));
                }
                if (!stream.destroyed) {
                    stream.once("error", eventHandler.errorHandler(_this));
                    stream.once("close", eventHandler.closeHandler(_this));
                }
                const connectionReadyHandler = function () {
                    _this.removeListener("close", connectionCloseHandler);
                    resolve();
                };
                var connectionCloseHandler = function () {
                    _this.removeListener("ready", connectionReadyHandler);
                    reject(new Error(utils_1.CONNECTION_CLOSED_ERROR_MSG));
                };
                _this.once("ready", connectionReadyHandler);
                _this.once("close", connectionCloseHandler);
            });
        });
        return (0, standard_as_callback_1.default)(promise, callback);
    }
    /**
     * Disconnect from Redis.
     *
     * This method closes the connection immediately,
     * and may lose some pending replies that haven't written to client.
     * If you want to wait for the pending replies, use Redis#quit instead.
     */
    disconnect(reconnect = false) {
        if (!reconnect) {
            this.manuallyClosing = true;
        }
        if (this.reconnectTimeout && !reconnect) {
            clearTimeout(this.reconnectTimeout);
            this.reconnectTimeout = null;
        }
        if (this.status === "wait") {
            eventHandler.closeHandler(this)();
        }
        else {
            this.connector.disconnect();
        }
    }
    /**
     * Disconnect from Redis.
     *
     * @deprecated
     */
    end() {
        this.disconnect();
    }
    /**
     * Create a new instance with the same options as the current one.
     *
     * @example
     * ```js
     * var redis = new Redis(6380);
     * var anotherRedis = redis.duplicate();
     * ```
     */
    duplicate(override) {
        return new Redis({ ...this.options, ...override });
    }
    /**
     * Mode of the connection.
     *
     * One of `"normal"`, `"subscriber"`, or `"monitor"`. When the connection is
     * not in `"normal"` mode, certain commands are not allowed.
     */
    get mode() {
        var _a;
        return this.options.monitor
            ? "monitor"
            : ((_a = this.condition) === null || _a === void 0 ? void 0 : _a.subscriber)
                ? "subscriber"
                : "normal";
    }
    /**
     * Listen for all requests received by the server in real time.
     *
     * This command will create a new connection to Redis and send a
     * MONITOR command via the new connection in order to avoid disturbing
     * the current connection.
     *
     * @param callback The callback function. If omit, a promise will be returned.
     * @example
     * ```js
     * var redis = new Redis();
     * redis.monitor(function (err, monitor) {
     *   // Entering monitoring mode.
     *   monitor.on('monitor', function (time, args, source, database) {
     *     console.log(time + ": " + util.inspect(args));
     *   });
     * });
     *
     * // supports promise as well as other commands
     * redis.monitor().then(function (monitor) {
     *   monitor.on('monitor', function (time, args, source, database) {
     *     console.log(time + ": " + util.inspect(args));
     *   });
     * });
     * ```
     */
    monitor(callback) {
        const monitorInstance = this.duplicate({
            monitor: true,
            lazyConnect: false,
        });
        return (0, standard_as_callback_1.default)(new Promise(function (resolve, reject) {
            monitorInstance.once("error", reject);
            monitorInstance.once("monitoring", function () {
                resolve(monitorInstance);
            });
        }), callback);
    }
    /**
     * Send a command to Redis
     *
     * This method is used internally and in most cases you should not
     * use it directly. If you need to send a command that is not supported
     * by the library, you can use the `call` method:
     *
     * ```js
     * const redis = new Redis();
     *
     * redis.call('set', 'foo', 'bar');
     * // or
     * redis.call(['set', 'foo', 'bar']);
     * ```
     *
     * @ignore
     */
    sendCommand(command, stream) {
        var _a, _b;
        if (this.status === "wait") {
            this.connect().catch(lodash_1.noop);
        }
        if (this.status === "end") {
            command.reject(new Error(utils_1.CONNECTION_CLOSED_ERROR_MSG));
            return command.promise;
        }
        if (((_a = this.condition) === null || _a === void 0 ? void 0 : _a.subscriber) &&
            !Command_1.default.checkFlag("VALID_IN_SUBSCRIBER_MODE", command.name)) {
            command.reject(new Error("Connection in subscriber mode, only subscriber commands may be used"));
            return command.promise;
        }
        if (typeof this.options.commandTimeout === "number") {
            command.setTimeout(this.options.commandTimeout);
        }
        const blockingTimeout = this.getBlockingTimeoutInMs(command);
        let writable = this.status === "ready" ||
            (!stream &&
                this.status === "connect" &&
                (0, commands_1.exists)(command.name, { caseInsensitive: true }) &&
                ((0, commands_1.hasFlag)(command.name, "loading", { nameCaseInsensitive: true }) ||
                    Command_1.default.checkFlag("HANDSHAKE_COMMANDS", command.name)));
        if (!this.stream) {
            writable = false;
        }
        else if (!this.stream.writable) {
            writable = false;
            // @ts-expect-error
        }
        else if (this.stream._writableState && this.stream._writableState.ended) {
            // TODO: We should be able to remove this as the PR has already been merged.
            // https://github.com/iojs/io.js/pull/1217
            writable = false;
        }
        if (!writable) {
            if (!this.options.enableOfflineQueue) {
                command.reject(new Error("Stream isn't writeable and enableOfflineQueue options is false"));
                return command.promise;
            }
            if (command.name === "quit" && this.offlineQueue.length === 0) {
                this.disconnect();
                command.resolve(Buffer.from("OK"));
                return command.promise;
            }
            // @ts-expect-error
            if (debug.enabled) {
                debug("queue command[%s]: %d -> %s(%o)", this._getDescription(), this.condition.select, command.name, command.args);
            }
            this.offlineQueue.push({
                command: command,
                stream: stream,
                select: this.condition.select,
            });
            // For blocking commands in the offline queue, arm a client-side timeout
            // only when blockingTimeout is configured. Without this option, queued
            // blocking commands may wait indefinitely on a dead connection.
            if (Command_1.default.checkFlag("BLOCKING_COMMANDS", command.name)) {
                const offlineTimeout = this.getConfiguredBlockingTimeout();
                if (offlineTimeout !== undefined) {
                    command.setBlockingTimeout(offlineTimeout);
                }
            }
        }
        else {
            // @ts-expect-error
            if (debug.enabled) {
                debug("write command[%s]: %d -> %s(%o)", this._getDescription(), (_b = this.condition) === null || _b === void 0 ? void 0 : _b.select, command.name, command.args);
            }
            if (stream) {
                if ("isPipeline" in stream && stream.isPipeline) {
                    stream.write(command.toWritable(stream.destination.redis.stream));
                }
                else {
                    stream.write(command.toWritable(stream));
                }
            }
            else {
                this.stream.write(command.toWritable(this.stream));
            }
            this.commandQueue.push({
                command: command,
                stream: stream,
                select: this.condition.select,
            });
            if (blockingTimeout !== undefined) {
                command.setBlockingTimeout(blockingTimeout);
            }
            if (Command_1.default.checkFlag("WILL_DISCONNECT", command.name)) {
                this.manuallyClosing = true;
            }
            if (this.options.socketTimeout !== undefined && this.socketTimeoutTimer === undefined) {
                this.setSocketTimeout();
            }
        }
        if (command.name === "select" && (0, utils_1.isInt)(command.args[0])) {
            const db = parseInt(command.args[0], 10);
            if (this.condition.select !== db) {
                this.condition.select = db;
                this.emit("select", db);
                debug("switch to db [%d]", this.condition.select);
            }
        }
        return command.promise;
    }
    getBlockingTimeoutInMs(command) {
        var _a;
        if (!Command_1.default.checkFlag("BLOCKING_COMMANDS", command.name)) {
            return undefined;
        }
        // Feature is opt-in: only enabled when blockingTimeout is set to a positive number
        const configuredTimeout = this.getConfiguredBlockingTimeout();
        if (configuredTimeout === undefined) {
            return undefined;
        }
        const timeout = command.extractBlockingTimeout();
        if (typeof timeout === "number") {
            if (timeout > 0) {
                // Finite timeout from command args - add grace period
                return timeout + ((_a = this.options.blockingTimeoutGrace) !== null && _a !== void 0 ? _a : RedisOptions_1.DEFAULT_REDIS_OPTIONS.blockingTimeoutGrace);
            }
            // Command has timeout=0 (block forever), use blockingTimeout option as safety net
            return configuredTimeout;
        }
        if (timeout === null) {
            // No BLOCK option found (e.g., XREAD without BLOCK), use blockingTimeout as safety net
            return configuredTimeout;
        }
        return undefined;
    }
    getConfiguredBlockingTimeout() {
        if (typeof this.options.blockingTimeout === "number" &&
            this.options.blockingTimeout > 0) {
            return this.options.blockingTimeout;
        }
        return undefined;
    }
    setSocketTimeout() {
        this.socketTimeoutTimer = setTimeout(() => {
            this.stream.destroy(new Error(`Socket timeout. Expecting data, but didn't receive any in ${this.options.socketTimeout}ms.`));
            this.socketTimeoutTimer = undefined;
        }, this.options.socketTimeout);
        // this handler must run after the "data" handler in "DataHandler"
        // so that `this.commandQueue.length` will be updated
        this.stream.once("data", () => {
            clearTimeout(this.socketTimeoutTimer);
            this.socketTimeoutTimer = undefined;
            if (this.commandQueue.length === 0)
                return;
            this.setSocketTimeout();
        });
    }
    scanStream(options) {
        return this.createScanStream("scan", { options });
    }
    scanBufferStream(options) {
        return this.createScanStream("scanBuffer", { options });
    }
    sscanStream(key, options) {
        return this.createScanStream("sscan", { key, options });
    }
    sscanBufferStream(key, options) {
        return this.createScanStream("sscanBuffer", { key, options });
    }
    hscanStream(key, options) {
        return this.createScanStream("hscan", { key, options });
    }
    hscanBufferStream(key, options) {
        return this.createScanStream("hscanBuffer", { key, options });
    }
    zscanStream(key, options) {
        return this.createScanStream("zscan", { key, options });
    }
    zscanBufferStream(key, options) {
        return this.createScanStream("zscanBuffer", { key, options });
    }
    /**
     * Emit only when there's at least one listener.
     *
     * @ignore
     */
    silentEmit(eventName, arg) {
        let error;
        if (eventName === "error") {
            error = arg;
            if (this.status === "end") {
                return;
            }
            if (this.manuallyClosing) {
                // ignore connection related errors when manually disconnecting
                if (error instanceof Error &&
                    (error.message === utils_1.CONNECTION_CLOSED_ERROR_MSG ||
                        // @ts-expect-error
                        error.syscall === "connect" ||
                        // @ts-expect-error
                        error.syscall === "read")) {
                    return;
                }
            }
        }
        if (this.listeners(eventName).length > 0) {
            return this.emit.apply(this, arguments);
        }
        if (error && error instanceof Error) {
            console.error("[ioredis] Unhandled error event:", error.stack);
        }
        return false;
    }
    /**
     * @ignore
     */
    recoverFromFatalError(_commandError, err, options) {
        this.flushQueue(err, options);
        this.silentEmit("error", err);
        this.disconnect(true);
    }
    /**
     * @ignore
     */
    handleReconnection(err, item) {
        var _a;
        let needReconnect = false;
        if (this.options.reconnectOnError &&
            !Command_1.default.checkFlag("IGNORE_RECONNECT_ON_ERROR", item.command.name)) {
            needReconnect = this.options.reconnectOnError(err);
        }
        switch (needReconnect) {
            case 1:
            case true:
                if (this.status !== "reconnecting") {
                    this.disconnect(true);
                }
                item.command.reject(err);
                break;
            case 2:
                if (this.status !== "reconnecting") {
                    this.disconnect(true);
                }
                if (((_a = this.condition) === null || _a === void 0 ? void 0 : _a.select) !== item.select &&
                    item.command.name !== "select") {
                    this.select(item.select);
                }
                // TODO
                // @ts-expect-error
                this.sendCommand(item.command);
                break;
            default:
                item.command.reject(err);
        }
    }
    /**
     * Get description of the connection. Used for debugging.
     */
    _getDescription() {
        let description;
        if ("path" in this.options && this.options.path) {
            description = this.options.path;
        }
        else if (this.stream &&
            this.stream.remoteAddress &&
            this.stream.remotePort) {
            description = this.stream.remoteAddress + ":" + this.stream.remotePort;
        }
        else if ("host" in this.options && this.options.host) {
            description = this.options.host + ":" + this.options.port;
        }
        else {
            // Unexpected
            description = "";
        }
        if (this.options.connectionName) {
            description += ` (${this.options.connectionName})`;
        }
        return description;
    }
    resetCommandQueue() {
        this.commandQueue = new Deque();
    }
    resetOfflineQueue() {
        this.offlineQueue = new Deque();
    }
    parseOptions(...args) {
        const options = {};
        let isTls = false;
        for (let i = 0; i < args.length; ++i) {
            const arg = args[i];
            if (arg === null || typeof arg === "undefined") {
                continue;
            }
            if (typeof arg === "object") {
                (0, lodash_1.defaults)(options, arg);
            }
            else if (typeof arg === "string") {
                (0, lodash_1.defaults)(options, (0, utils_1.parseURL)(arg));
                if (arg.startsWith("rediss://")) {
                    isTls = true;
                }
            }
            else if (typeof arg === "number") {
                options.port = arg;
            }
            else {
                throw new Error("Invalid argument " + arg);
            }
        }
        if (isTls) {
            (0, lodash_1.defaults)(options, { tls: true });
        }
        (0, lodash_1.defaults)(options, Redis.defaultOptions);
        if (typeof options.port === "string") {
            options.port = parseInt(options.port, 10);
        }
        if (typeof options.db === "string") {
            options.db = parseInt(options.db, 10);
        }
        // @ts-expect-error
        this.options = (0, utils_1.resolveTLSProfile)(options);
    }
    /**
     * Change instance's status
     */
    setStatus(status, arg) {
        // @ts-expect-error
        if (debug.enabled) {
            debug("status[%s]: %s -> %s", this._getDescription(), this.status || "[empty]", status);
        }
        this.status = status;
        process.nextTick(this.emit.bind(this, status, arg));
    }
    createScanStream(command, { key, options = {} }) {
        return new ScanStream_1.default({
            objectMode: true,
            key: key,
            redis: this,
            command: command,
            ...options,
        });
    }
    /**
     * Flush offline queue and command queue with error.
     *
     * @param error The error object to send to the commands
     * @param options options
     */
    flushQueue(error, options) {
        options = (0, lodash_1.defaults)({}, options, {
            offlineQueue: true,
            commandQueue: true,
        });
        let item;
        if (options.offlineQueue) {
            while ((item = this.offlineQueue.shift())) {
                item.command.reject(error);
            }
        }
        if (options.commandQueue) {
            if (this.commandQueue.length > 0) {
                if (this.stream) {
                    this.stream.removeAllListeners("data");
                }
                while ((item = this.commandQueue.shift())) {
                    item.command.reject(error);
                }
            }
        }
    }
    /**
     * Check whether Redis has finished loading the persistent data and is able to
     * process commands.
     */
    _readyCheck(callback) {
        const _this = this;
        this.info(function (err, res) {
            if (err) {
                if (err.message && err.message.includes("NOPERM")) {
                    console.warn(`Skipping the ready check because INFO command fails: "${err.message}". You can disable ready check with "enableReadyCheck". More: https://github.com/luin/ioredis/wiki/Disable-ready-check.`);
                    return callback(null, {});
                }
                return callback(err);
            }
            if (typeof res !== "string") {
                return callback(null, res);
            }
            const info = {};
            const lines = res.split("\r\n");
            for (let i = 0; i < lines.length; ++i) {
                const [fieldName, ...fieldValueParts] = lines[i].split(":");
                const fieldValue = fieldValueParts.join(":");
                if (fieldValue) {
                    info[fieldName] = fieldValue;
                }
            }
            if (!info.loading || info.loading === "0") {
                callback(null, info);
            }
            else {
                const loadingEtaMs = (info.loading_eta_seconds || 1) * 1000;
                const retryTime = _this.options.maxLoadingRetryTime &&
                    _this.options.maxLoadingRetryTime < loadingEtaMs
                    ? _this.options.maxLoadingRetryTime
                    : loadingEtaMs;
                debug("Redis server still loading, trying again in " + retryTime + "ms");
                setTimeout(function () {
                    _this._readyCheck(callback);
                }, retryTime);
            }
        }).catch(lodash_1.noop);
    }
 }
 Redis.Cluster = cluster_1.default;
 Redis.Command = Command_1.default;
 /**
 * Default options
 */
 Redis.defaultOptions = RedisOptions_1.DEFAULT_REDIS_OPTIONS;
 (0, applyMixin_1.default)(Redis, events_1.EventEmitter);
 (0, transaction_1.addTransactionSupport)(Redis.prototype);
 exports.default = Redis;
--- a/backend/node_modules/ioredis/built/ScanStream.d.ts
+++ b/backend/node_modules/ioredis/built/ScanStream.d.ts
@@ -0,0 +1,23 @@
 /// <reference types="node" />
 import { Readable, ReadableOptions } from "stream";
 interface Options extends ReadableOptions {
    key?: string;
    match?: string;
    type?: string;
    command: string;
    redis: any;
    count?: string | number;
    noValues?: boolean;
 }
 /**
 * Convenient class to convert the process of scanning keys to a readable stream.
 */
 export default class ScanStream extends Readable {
    private opt;
    private _redisCursor;
    private _redisDrained;
    constructor(opt: Options);
    _read(): void;
    close(): void;
 }
 export {};
--- a/backend/node_modules/ioredis/built/ScanStream.js
+++ b/backend/node_modules/ioredis/built/ScanStream.js
@@ -0,0 +1,51 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const stream_1 = require("stream");
 /**
 * Convenient class to convert the process of scanning keys to a readable stream.
 */
 class ScanStream extends stream_1.Readable {
    constructor(opt) {
        super(opt);
        this.opt = opt;
        this._redisCursor = "0";
        this._redisDrained = false;
    }
    _read() {
        if (this._redisDrained) {
            this.push(null);
            return;
        }
        const args = [this._redisCursor];
        if (this.opt.key) {
            args.unshift(this.opt.key);
        }
        if (this.opt.match) {
            args.push("MATCH", this.opt.match);
        }
        if (this.opt.type) {
            args.push("TYPE", this.opt.type);
        }
        if (this.opt.count) {
            args.push("COUNT", String(this.opt.count));
        }
        if (this.opt.noValues) {
            args.push("NOVALUES");
        }
        this.opt.redis[this.opt.command](args, (err, res) => {
            if (err) {
                this.emit("error", err);
                return;
            }
            this._redisCursor = res[0] instanceof Buffer ? res[0].toString() : res[0];
            if (this._redisCursor === "0") {
                this._redisDrained = true;
            }
            this.push(res[1]);
        });
    }
    close() {
        this._redisDrained = true;
    }
 }
 exports.default = ScanStream;
--- a/backend/node_modules/ioredis/built/Script.d.ts
+++ b/backend/node_modules/ioredis/built/Script.d.ts
@@ -0,0 +1,11 @@
 import { Callback } from "./types";
 export default class Script {
    private lua;
    private numberOfKeys;
    private keyPrefix;
    private readOnly;
    private sha;
    private Command;
    constructor(lua: string, numberOfKeys?: number | null, keyPrefix?: string, readOnly?: boolean);
    execute(container: any, args: any[], options: any, callback?: Callback): any;
 }
--- a/backend/node_modules/ioredis/built/Script.js
+++ b/backend/node_modules/ioredis/built/Script.js
@@ -0,0 +1,62 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const crypto_1 = require("crypto");
 const Command_1 = require("./Command");
 const standard_as_callback_1 = require("standard-as-callback");
 class Script {
    constructor(lua, numberOfKeys = null, keyPrefix = "", readOnly = false) {
        this.lua = lua;
        this.numberOfKeys = numberOfKeys;
        this.keyPrefix = keyPrefix;
        this.readOnly = readOnly;
        this.sha = (0, crypto_1.createHash)("sha1").update(lua).digest("hex");
        const sha = this.sha;
        const socketHasScriptLoaded = new WeakSet();
        this.Command = class CustomScriptCommand extends Command_1.default {
            toWritable(socket) {
                const origReject = this.reject;
                this.reject = (err) => {
                    if (err.message.indexOf("NOSCRIPT") !== -1) {
                        socketHasScriptLoaded.delete(socket);
                    }
                    origReject.call(this, err);
                };
                if (!socketHasScriptLoaded.has(socket)) {
                    socketHasScriptLoaded.add(socket);
                    this.name = "eval";
                    this.args[0] = lua;
                }
                else if (this.name === "eval") {
                    this.name = "evalsha";
                    this.args[0] = sha;
                }
                return super.toWritable(socket);
            }
        };
    }
    execute(container, args, options, callback) {
        if (typeof this.numberOfKeys === "number") {
            args.unshift(this.numberOfKeys);
        }
        if (this.keyPrefix) {
            options.keyPrefix = this.keyPrefix;
        }
        if (this.readOnly) {
            options.readOnly = true;
        }
        const evalsha = new this.Command("evalsha", [this.sha, ...args], options);
        evalsha.promise = evalsha.promise.catch((err) => {
            if (err.message.indexOf("NOSCRIPT") === -1) {
                throw err;
            }
            // Resend the same custom evalsha command that gets transformed
            // to an eval in case it's not loaded yet on the connection.
            const resend = new this.Command("evalsha", [this.sha, ...args], options);
            const client = container.isPipeline ? container.redis : container;
            return client.sendCommand(resend);
        });
        (0, standard_as_callback_1.default)(evalsha.promise, callback);
        return container.sendCommand(evalsha);
    }
 }
 exports.default = Script;
--- a/backend/node_modules/ioredis/built/SubscriptionSet.d.ts
+++ b/backend/node_modules/ioredis/built/SubscriptionSet.d.ts
@@ -0,0 +1,14 @@
 import { CommandNameFlags } from "./Command";
 declare type AddSet = CommandNameFlags["ENTER_SUBSCRIBER_MODE"][number];
 declare type DelSet = CommandNameFlags["EXIT_SUBSCRIBER_MODE"][number];
 /**
 * Tiny class to simplify dealing with subscription set
 */
 export default class SubscriptionSet {
    private set;
    add(set: AddSet, channel: string): void;
    del(set: DelSet, channel: string): void;
    channels(set: AddSet | DelSet): string[];
    isEmpty(): boolean;
 }
 export {};
--- a/backend/node_modules/ioredis/built/SubscriptionSet.js
+++ b/backend/node_modules/ioredis/built/SubscriptionSet.js
@@ -0,0 +1,41 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 /**
 * Tiny class to simplify dealing with subscription set
 */
 class SubscriptionSet {
    constructor() {
        this.set = {
            subscribe: {},
            psubscribe: {},
            ssubscribe: {},
        };
    }
    add(set, channel) {
        this.set[mapSet(set)][channel] = true;
    }
    del(set, channel) {
        delete this.set[mapSet(set)][channel];
    }
    channels(set) {
        return Object.keys(this.set[mapSet(set)]);
    }
    isEmpty() {
        return (this.channels("subscribe").length === 0 &&
            this.channels("psubscribe").length === 0 &&
            this.channels("ssubscribe").length === 0);
    }
 }
 exports.default = SubscriptionSet;
 function mapSet(set) {
    if (set === "unsubscribe") {
        return "subscribe";
    }
    if (set === "punsubscribe") {
        return "psubscribe";
    }
    if (set === "sunsubscribe") {
        return "ssubscribe";
    }
    return set;
 }
--- a/backend/node_modules/ioredis/built/autoPipelining.d.ts
+++ b/backend/node_modules/ioredis/built/autoPipelining.d.ts
@@ -0,0 +1,8 @@
 /// <reference types="node" />
 import { ArgumentType } from "./Command";
 export declare const kExec: unique symbol;
 export declare const kCallbacks: unique symbol;
 export declare const notAllowedAutoPipelineCommands: string[];
 export declare function shouldUseAutoPipelining(client: any, functionName: string, commandName: string): boolean;
 export declare function getFirstValueInFlattenedArray(args: ArgumentType[]): string | Buffer | number | null | undefined;
 export declare function executeWithAutoPipelining(client: any, functionName: string, commandName: string, args: ArgumentType[], callback: any): Promise<unknown>;
--- a/backend/node_modules/ioredis/built/autoPipelining.js
+++ b/backend/node_modules/ioredis/built/autoPipelining.js
@@ -0,0 +1,167 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.executeWithAutoPipelining = exports.getFirstValueInFlattenedArray = exports.shouldUseAutoPipelining = exports.notAllowedAutoPipelineCommands = exports.kCallbacks = exports.kExec = void 0;
 const lodash_1 = require("./utils/lodash");
 const calculateSlot = require("cluster-key-slot");
 const standard_as_callback_1 = require("standard-as-callback");
 const commands_1 = require("@ioredis/commands");
 exports.kExec = Symbol("exec");
 exports.kCallbacks = Symbol("callbacks");
 exports.notAllowedAutoPipelineCommands = [
    "auth",
    "info",
    "script",
    "quit",
    "cluster",
    "pipeline",
    "multi",
    "subscribe",
    "psubscribe",
    "unsubscribe",
    "unpsubscribe",
    "select",
    "client",
 ];
 function executeAutoPipeline(client, slotKey) {
    /*
      If a pipeline is already executing, keep queueing up commands
      since ioredis won't serve two pipelines at the same time
    */
    if (client._runningAutoPipelines.has(slotKey)) {
        return;
    }
    if (!client._autoPipelines.has(slotKey)) {
        /*
          Rare edge case. Somehow, something has deleted this running autopipeline in an immediate
          call to executeAutoPipeline.
          Maybe the callback in the pipeline.exec is sometimes called in the same tick,
          e.g. if redis is disconnected?
        */
        return;
    }
    client._runningAutoPipelines.add(slotKey);
    // Get the pipeline and immediately delete it so that new commands are queued on a new pipeline
    const pipeline = client._autoPipelines.get(slotKey);
    client._autoPipelines.delete(slotKey);
    const callbacks = pipeline[exports.kCallbacks];
    // Stop keeping a reference to callbacks immediately after the callbacks stop being used.
    // This allows the GC to reclaim objects referenced by callbacks, especially with 16384 slots
    // in Redis.Cluster
    pipeline[exports.kCallbacks] = null;
    // Perform the call
    pipeline.exec(function (err, results) {
        client._runningAutoPipelines.delete(slotKey);
        /*
          Invoke all callback in nextTick so the stack is cleared
          and callbacks can throw errors without affecting other callbacks.
        */
        if (err) {
            for (let i = 0; i < callbacks.length; i++) {
                process.nextTick(callbacks[i], err);
            }
        }
        else {
            for (let i = 0; i < callbacks.length; i++) {
                process.nextTick(callbacks[i], ...results[i]);
            }
        }
        // If there is another pipeline on the same node, immediately execute it without waiting for nextTick
        if (client._autoPipelines.has(slotKey)) {
            executeAutoPipeline(client, slotKey);
        }
    });
 }
 function shouldUseAutoPipelining(client, functionName, commandName) {
    return (functionName &&
        client.options.enableAutoPipelining &&
        !client.isPipeline &&
        !exports.notAllowedAutoPipelineCommands.includes(commandName) &&
        !client.options.autoPipeliningIgnoredCommands.includes(commandName));
 }
 exports.shouldUseAutoPipelining = shouldUseAutoPipelining;
 function getFirstValueInFlattenedArray(args) {
    for (let i = 0; i < args.length; i++) {
        const arg = args[i];
        if (typeof arg === "string") {
            return arg;
        }
        else if (Array.isArray(arg) || (0, lodash_1.isArguments)(arg)) {
            if (arg.length === 0) {
                continue;
            }
            return arg[0];
        }
        const flattened = [arg].flat();
        if (flattened.length > 0) {
            return flattened[0];
        }
    }
    return undefined;
 }
 exports.getFirstValueInFlattenedArray = getFirstValueInFlattenedArray;
 function executeWithAutoPipelining(client, functionName, commandName, args, callback) {
    // On cluster mode let's wait for slots to be available
    if (client.isCluster && !client.slots.length) {
        if (client.status === "wait")
            client.connect().catch(lodash_1.noop);
        return (0, standard_as_callback_1.default)(new Promise(function (resolve, reject) {
            client.delayUntilReady((err) => {
                if (err) {
                    reject(err);
                    return;
                }
                executeWithAutoPipelining(client, functionName, commandName, args, null).then(resolve, reject);
            });
        }), callback);
    }
    // If we have slot information, we can improve routing by grouping slots served by the same subset of nodes
    // Note that the first value in args may be a (possibly empty) array.
    // ioredis will only flatten one level of the array, in the Command constructor.
    const prefix = client.options.keyPrefix || "";
    let slotKey = client.isCluster
        ? client.slots[calculateSlot(`${prefix}${getFirstValueInFlattenedArray(args)}`)].join(",")
        : "main";
    // When scaleReads is enabled, separate read and write commands into different pipelines
    // so they can be routed to replicas and masters respectively
    if (client.isCluster && client.options.scaleReads !== "master") {
        const isReadOnly = (0, commands_1.exists)(commandName) && (0, commands_1.hasFlag)(commandName, "readonly");
        slotKey += isReadOnly ? ":read" : ":write";
    }
    if (!client._autoPipelines.has(slotKey)) {
        const pipeline = client.pipeline();
        pipeline[exports.kExec] = false;
        pipeline[exports.kCallbacks] = [];
        client._autoPipelines.set(slotKey, pipeline);
    }
    const pipeline = client._autoPipelines.get(slotKey);
    /*
      Mark the pipeline as scheduled.
      The symbol will make sure that the pipeline is only scheduled once per tick.
      New commands are appended to an already scheduled pipeline.
    */
    if (!pipeline[exports.kExec]) {
        pipeline[exports.kExec] = true;
        /*
          Deferring with setImmediate so we have a chance to capture multiple
          commands that can be scheduled by I/O events already in the event loop queue.
        */
        setImmediate(executeAutoPipeline, client, slotKey);
    }
    // Create the promise which will execute the command in the pipeline.
    const autoPipelinePromise = new Promise(function (resolve, reject) {
        pipeline[exports.kCallbacks].push(function (err, value) {
            if (err) {
                reject(err);
                return;
            }
            resolve(value);
        });
        if (functionName === "call") {
            args.unshift(commandName);
        }
        pipeline[functionName](...args);
    });
    return (0, standard_as_callback_1.default)(autoPipelinePromise, callback);
 }
 exports.executeWithAutoPipelining = executeWithAutoPipelining;
--- a/backend/node_modules/ioredis/built/cluster/ClusterOptions.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/ClusterOptions.d.ts
@@ -0,0 +1,172 @@
 /// <reference types="node" />
 import { SrvRecord } from "dns";
 import { RedisOptions } from "../redis/RedisOptions";
 import { CommanderOptions } from "../utils/Commander";
 import { NodeRole } from "./util";
 export declare type DNSResolveSrvFunction = (hostname: string, callback: (err: NodeJS.ErrnoException | null | undefined, records?: SrvRecord[]) => void) => void;
 export declare type DNSLookupFunction = (hostname: string, callback: (err: NodeJS.ErrnoException | null | undefined, address: string, family?: number) => void) => void;
 export declare type NatMapFunction = (key: string) => {
    host: string;
    port: number;
 } | null;
 export declare type NatMap = {
    [key: string]: {
        host: string;
        port: number;
    };
 } | NatMapFunction;
 /**
 * Options for Cluster constructor
 */
 export interface ClusterOptions extends CommanderOptions {
    /**
     * See "Quick Start" section.
     *
     * @default (times) => Math.min(100 + times * 2, 2000)
     */
    clusterRetryStrategy?: ((times: number, reason?: Error) => number | void | null) | undefined;
    /**
     * See Redis class.
     *
     * @default true
     */
    enableOfflineQueue?: boolean | undefined;
    /**
     * When enabled, ioredis only emits "ready" event when `CLUSTER INFO`
     * command reporting the cluster is ready for handling commands.
     *
     * @default true
     */
    enableReadyCheck?: boolean | undefined;
    /**
     * Scale reads to the node with the specified role.
     *
     * @default "master"
     */
    scaleReads?: NodeRole | Function | undefined;
    /**
     * When a MOVED or ASK error is received, client will redirect the
     * command to another node.
     * This option limits the max redirections allowed to send a command.
     *
     * @default 16
     */
    maxRedirections?: number | undefined;
    /**
     * When an error is received when sending a command (e.g.
     * "Connection is closed." when the target Redis node is down), client will retry
     * if `retryDelayOnFailover` is valid delay time (in ms).
     *
     * @default 100
     */
    retryDelayOnFailover?: number | undefined;
    /**
     * When a CLUSTERDOWN error is received, client will retry
     * if `retryDelayOnClusterDown` is valid delay time (in ms).
     *
     * @default 100
     */
    retryDelayOnClusterDown?: number | undefined;
    /**
     * When a TRYAGAIN error is received, client will retry
     * if `retryDelayOnTryAgain` is valid delay time (in ms).
     *
     * @default 100
     */
    retryDelayOnTryAgain?: number | undefined;
    /**
     * By default, this value is 0, which means when a `MOVED` error is received,
     * the client will resend the command instantly to the node returned together with
     * the `MOVED` error. However, sometimes it takes time for a cluster to become
     * state stabilized after a failover, so adding a delay before resending can
     * prevent a ping pong effect.
     *
     * @default 0
     */
    retryDelayOnMoved?: number | undefined;
    /**
     * The milliseconds before a timeout occurs while refreshing
     * slots from the cluster.
     *
     * @default 1000
     */
    slotsRefreshTimeout?: number | undefined;
    /**
     * The milliseconds between every automatic slots refresh.
     *
     * @default 5000
     */
    slotsRefreshInterval?: number | undefined;
    /**
     * Use sharded subscribers instead of a single subscriber.
     *
     * If sharded subscribers are used, then one additional subscriber connection per master node
     * is established. If you don't plan to use SPUBLISH/SSUBSCRIBE, then this should be disabled.
     *
     * @default false
     */
    shardedSubscribers?: boolean | undefined;
    /**
     * Passed to the constructor of `Redis`
     *
     * @default null
     */
    redisOptions?: Omit<RedisOptions, "port" | "host" | "path" | "sentinels" | "retryStrategy" | "enableOfflineQueue" | "readOnly"> | undefined;
    /**
     * By default, When a new Cluster instance is created,
     * it will connect to the Redis cluster automatically.
     * If you want to keep the instance disconnected until the first command is called,
     * set this option to `true`.
     *
     * @default false
     */
    lazyConnect?: boolean | undefined;
    /**
     * Discover nodes using SRV records
     *
     * @default false
     */
    useSRVRecords?: boolean | undefined;
    /**
     * SRV records will be resolved via this function.
     *
     * You may provide a custom `resolveSrv` function when you want to customize
     * the cache behavior of the default function.
     *
     * @default require('dns').resolveSrv
     */
    resolveSrv?: DNSResolveSrvFunction | undefined;
    /**
     * Hostnames will be resolved to IP addresses via this function.
     * This is needed when the addresses of startup nodes are hostnames instead
     * of IPs.
     *
     * You may provide a custom `lookup` function when you want to customize
     * the cache behavior of the default function.
     *
     * @default require('dns').lookup
     */
    dnsLookup?: DNSLookupFunction | undefined;
    natMap?: NatMap | undefined;
    /**
     * See Redis class.
     *
     * @default false
     */
    enableAutoPipelining?: boolean | undefined;
    /**
     * See Redis class.
     *
     * @default []
     */
    autoPipeliningIgnoredCommands?: string[] | undefined;
    /**
     * Custom LUA commands
     */
    scripts?: Record<string, {
        lua: string;
        numberOfKeys?: number;
        readOnly?: boolean;
    }> | undefined;
 }
 export declare const DEFAULT_CLUSTER_OPTIONS: ClusterOptions;
--- a/backend/node_modules/ioredis/built/cluster/ClusterOptions.js
+++ b/backend/node_modules/ioredis/built/cluster/ClusterOptions.js
@@ -0,0 +1,22 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.DEFAULT_CLUSTER_OPTIONS = void 0;
 const dns_1 = require("dns");
 exports.DEFAULT_CLUSTER_OPTIONS = {
    clusterRetryStrategy: (times) => Math.min(100 + times * 2, 2000),
    enableOfflineQueue: true,
    enableReadyCheck: true,
    scaleReads: "master",
    maxRedirections: 16,
    retryDelayOnMoved: 0,
    retryDelayOnFailover: 100,
    retryDelayOnClusterDown: 100,
    retryDelayOnTryAgain: 100,
    slotsRefreshTimeout: 1000,
    useSRVRecords: false,
    resolveSrv: dns_1.resolveSrv,
    dnsLookup: dns_1.lookup,
    enableAutoPipelining: false,
    autoPipeliningIgnoredCommands: [],
    shardedSubscribers: false,
 };
--- a/backend/node_modules/ioredis/built/cluster/ClusterSubscriber.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/ClusterSubscriber.d.ts
@@ -0,0 +1,29 @@
 /// <reference types="node" />
 import { EventEmitter } from "events";
 import ConnectionPool from "./ConnectionPool";
 export default class ClusterSubscriber {
    private connectionPool;
    private emitter;
    private isSharded;
    private started;
    private subscriber;
    private lastActiveSubscriber;
    private slotRange;
    constructor(connectionPool: ConnectionPool, emitter: EventEmitter, isSharded?: boolean);
    getInstance(): any;
    /**
     * Associate this subscriber to a specific slot range.
     *
     * Returns the range or an empty array if the slot range couldn't be associated.
     *
     * BTW: This is more for debugging and testing purposes.
     *
     * @param range
     */
    associateSlotRange(range: number[]): number[];
    start(): void;
    stop(): void;
    isStarted(): boolean;
    private onSubscriberEnd;
    private selectSubscriber;
 }
--- a/backend/node_modules/ioredis/built/cluster/ClusterSubscriber.js
+++ b/backend/node_modules/ioredis/built/cluster/ClusterSubscriber.js
@@ -0,0 +1,223 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const util_1 = require("./util");
 const utils_1 = require("../utils");
 const Redis_1 = require("../Redis");
 const debug = (0, utils_1.Debug)("cluster:subscriber");
 class ClusterSubscriber {
    constructor(connectionPool, emitter, isSharded = false) {
        this.connectionPool = connectionPool;
        this.emitter = emitter;
        this.isSharded = isSharded;
        this.started = false;
        //There is only one connection for the entire pool
        this.subscriber = null;
        //The slot range for which this subscriber is responsible
        this.slotRange = [];
        this.onSubscriberEnd = () => {
            if (!this.started) {
                debug("subscriber has disconnected, but ClusterSubscriber is not started, so not reconnecting.");
                return;
            }
            // If the subscriber closes whilst it's still the active connection,
            // we might as well try to connecting to a new node if possible to
            // minimise the number of missed publishes.
            debug("subscriber has disconnected, selecting a new one...");
            this.selectSubscriber();
        };
        // If the current node we're using as the subscriber disappears
        // from the node pool for some reason, we will select a new one
        // to connect to.
        // Note that this event is only triggered if the connection to
        // the node has been used; cluster subscriptions are setup with
        // lazyConnect = true. It's possible for the subscriber node to
        // disappear without this method being called!
        // See https://github.com/luin/ioredis/pull/1589
        this.connectionPool.on("-node", (_, key) => {
            if (!this.started || !this.subscriber) {
                return;
            }
            if ((0, util_1.getNodeKey)(this.subscriber.options) === key) {
                debug("subscriber has left, selecting a new one...");
                this.selectSubscriber();
            }
        });
        this.connectionPool.on("+node", () => {
            if (!this.started || this.subscriber) {
                return;
            }
            debug("a new node is discovered and there is no subscriber, selecting a new one...");
            this.selectSubscriber();
        });
    }
    getInstance() {
        return this.subscriber;
    }
    /**
     * Associate this subscriber to a specific slot range.
     *
     * Returns the range or an empty array if the slot range couldn't be associated.
     *
     * BTW: This is more for debugging and testing purposes.
     *
     * @param range
     */
    associateSlotRange(range) {
        if (this.isSharded) {
            this.slotRange = range;
        }
        return this.slotRange;
    }
    start() {
        this.started = true;
        this.selectSubscriber();
        debug("started");
    }
    stop() {
        this.started = false;
        if (this.subscriber) {
            this.subscriber.disconnect();
            this.subscriber = null;
        }
    }
    isStarted() {
        return this.started;
    }
    selectSubscriber() {
        const lastActiveSubscriber = this.lastActiveSubscriber;
        // Disconnect the previous subscriber even if there
        // will not be a new one.
        if (lastActiveSubscriber) {
            lastActiveSubscriber.off("end", this.onSubscriberEnd);
            lastActiveSubscriber.disconnect();
        }
        if (this.subscriber) {
            this.subscriber.off("end", this.onSubscriberEnd);
            this.subscriber.disconnect();
        }
        const sampleNode = (0, utils_1.sample)(this.connectionPool.getNodes());
        if (!sampleNode) {
            debug("selecting subscriber failed since there is no node discovered in the cluster yet");
            this.subscriber = null;
            return;
        }
        const { options } = sampleNode;
        debug("selected a subscriber %s:%s", options.host, options.port);
        /*
         * Create a specialized Redis connection for the subscription.
         * Note that auto reconnection is enabled here.
         *
         * `enableReadyCheck` is also enabled because although subscription is allowed
         * while redis is loading data from the disk, we can check if the password
         * provided for the subscriber is correct, and if not, the current subscriber
         * will be disconnected and a new subscriber will be selected.
         */
        let connectionPrefix = "subscriber";
        if (this.isSharded)
            connectionPrefix = "ssubscriber";
        this.subscriber = new Redis_1.default({
            port: options.port,
            host: options.host,
            username: options.username,
            password: options.password,
            enableReadyCheck: true,
            connectionName: (0, util_1.getConnectionName)(connectionPrefix, options.connectionName),
            lazyConnect: true,
            tls: options.tls,
            // Don't try to reconnect the subscriber connection. If the connection fails
            // we will get an end event (handled below), at which point we'll pick a new
            // node from the pool and try to connect to that as the subscriber connection.
            retryStrategy: null,
        });
        // Ignore the errors since they're handled in the connection pool.
        this.subscriber.on("error", utils_1.noop);
        this.subscriber.on("moved", () => {
            this.emitter.emit("forceRefresh");
        });
        // The node we lost connection to may not come back up in a
        // reasonable amount of time (e.g. a slave that's taken down
        // for maintainence), we could potentially miss many published
        // messages so we should reconnect as quickly as possible, to
        // a different node if needed.
        this.subscriber.once("end", this.onSubscriberEnd);
        // Re-subscribe previous channels
        const previousChannels = { subscribe: [], psubscribe: [], ssubscribe: [] };
        if (lastActiveSubscriber) {
            const condition = lastActiveSubscriber.condition || lastActiveSubscriber.prevCondition;
            if (condition && condition.subscriber) {
                previousChannels.subscribe = condition.subscriber.channels("subscribe");
                previousChannels.psubscribe =
                    condition.subscriber.channels("psubscribe");
                previousChannels.ssubscribe =
                    condition.subscriber.channels("ssubscribe");
            }
        }
        if (previousChannels.subscribe.length ||
            previousChannels.psubscribe.length ||
            previousChannels.ssubscribe.length) {
            let pending = 0;
            for (const type of ["subscribe", "psubscribe", "ssubscribe"]) {
                const channels = previousChannels[type];
                if (channels.length == 0) {
                    continue;
                }
                debug("%s %d channels", type, channels.length);
                if (type === "ssubscribe") {
                    for (const channel of channels) {
                        pending += 1;
                        this.subscriber[type](channel)
                            .then(() => {
                            if (!--pending) {
                                this.lastActiveSubscriber = this.subscriber;
                            }
                        })
                            .catch(() => {
                            // TODO: should probably disconnect the subscriber and try again.
                            debug("failed to ssubscribe to channel: %s", channel);
                        });
                    }
                }
                else {
                    pending += 1;
                    this.subscriber[type](channels)
                        .then(() => {
                        if (!--pending) {
                            this.lastActiveSubscriber = this.subscriber;
                        }
                    })
                        .catch(() => {
                        // TODO: should probably disconnect the subscriber and try again.
                        debug("failed to %s %d channels", type, channels.length);
                    });
                }
            }
        }
        else {
            this.lastActiveSubscriber = this.subscriber;
        }
        for (const event of [
            "message",
            "messageBuffer",
        ]) {
            this.subscriber.on(event, (arg1, arg2) => {
                this.emitter.emit(event, arg1, arg2);
            });
        }
        for (const event of ["pmessage", "pmessageBuffer"]) {
            this.subscriber.on(event, (arg1, arg2, arg3) => {
                this.emitter.emit(event, arg1, arg2, arg3);
            });
        }
        if (this.isSharded == true) {
            for (const event of [
                "smessage",
                "smessageBuffer",
            ]) {
                this.subscriber.on(event, (arg1, arg2) => {
                    this.emitter.emit(event, arg1, arg2);
                });
            }
        }
    }
 }
 exports.default = ClusterSubscriber;
--- a/backend/node_modules/ioredis/built/cluster/ClusterSubscriberGroup.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/ClusterSubscriberGroup.d.ts
@@ -0,0 +1,108 @@
 /// <reference types="node" />
 import * as EventEmitter from "events";
 import ShardedSubscriber from "./ShardedSubscriber";
 import { ClusterOptions } from "./ClusterOptions";
 /**
 * Redis distinguishes between "normal" and sharded PubSub. When using the normal PubSub feature,
 * exactly one subscriber exists per cluster instance because the Redis cluster bus forwards
 * messages between shards. Sharded PubSub removes this limitation by making each shard
 * responsible for its own messages.
 *
 * This class coordinates one ShardedSubscriber per master node in the cluster, providing
 * sharded PubSub support while keeping the public API backward compatible.
 */
 export default class ClusterSubscriberGroup {
    private readonly subscriberGroupEmitter;
    private readonly options;
    private shardedSubscribers;
    private clusterSlots;
    private subscriberToSlotsIndex;
    private channels;
    private failedAttemptsByNode;
    private isResetting;
    private pendingReset;
    private static readonly MAX_RETRY_ATTEMPTS;
    private static readonly MAX_BACKOFF_MS;
    private static readonly BASE_BACKOFF_MS;
    /**
     * Register callbacks
     *
     * @param cluster
     */
    constructor(subscriberGroupEmitter: EventEmitter, options: ClusterOptions);
    /**
     * Get the responsible subscriber.
     *
     * @param slot
     */
    getResponsibleSubscriber(slot: number): ShardedSubscriber | undefined;
    /**
     * Adds a channel for which this subscriber group is responsible
     *
     * @param channels
     */
    addChannels(channels: (string | Buffer)[]): number;
    /**
     * Removes channels for which the subscriber group is responsible by optionally unsubscribing
     * @param channels
     */
    removeChannels(channels: (string | Buffer)[]): number;
    /**
     * Disconnect all subscribers and clear some of the internal state.
     */
    stop(): void;
    /**
     * Start all not yet started subscribers
     */
    start(): Promise<any[]>;
    /**
     * Resets the subscriber group by disconnecting all subscribers that are no longer needed and connecting new ones.
     */
    reset(clusterSlots: string[][], clusterNodes: any[]): Promise<void>;
    /**
     * Refreshes the subscriber-related slot ranges
     *
     * Returns false if no refresh was needed
     *
     * @param targetSlots
     */
    private _refreshSlots;
    /**
     * Resubscribes to the previous channels
     *
     * @private
     */
    private _resubscribe;
    /**
     * Deep equality of the cluster slots objects
     *
     * @param other
     * @private
     */
    private _slotsAreEqual;
    /**
     * Checks if any subscribers are in an unhealthy state.
     *
     * A subscriber is considered unhealthy if:
     * - It exists but is not started (failed/disconnected)
     * - It's missing entirely for a node that should have one
     *
     * @returns true if any subscribers need to be recreated
     */
    private hasUnhealthySubscribers;
    /**
     * Handles failed subscriber connections by emitting an event to refresh the slots cache
     * after a backoff period.
     *
     * @param error
     * @param nodeKey
     */
    private handleSubscriberConnectFailed;
    /**
     * Handles successful subscriber connections by resetting the failed attempts counter.
     *
     * @param nodeKey
     */
    private handleSubscriberConnectSucceeded;
    private shouldStartSubscriber;
 }
--- a/backend/node_modules/ioredis/built/cluster/ClusterSubscriberGroup.js
+++ b/backend/node_modules/ioredis/built/cluster/ClusterSubscriberGroup.js
@@ -0,0 +1,373 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const utils_1 = require("../utils");
 const util_1 = require("./util");
 const calculateSlot = require("cluster-key-slot");
 const ShardedSubscriber_1 = require("./ShardedSubscriber");
 const debug = (0, utils_1.Debug)("cluster:subscriberGroup");
 /**
 * Redis distinguishes between "normal" and sharded PubSub. When using the normal PubSub feature,
 * exactly one subscriber exists per cluster instance because the Redis cluster bus forwards
 * messages between shards. Sharded PubSub removes this limitation by making each shard
 * responsible for its own messages.
 *
 * This class coordinates one ShardedSubscriber per master node in the cluster, providing
 * sharded PubSub support while keeping the public API backward compatible.
 */
 class ClusterSubscriberGroup {
    /**
     * Register callbacks
     *
     * @param cluster
     */
    constructor(subscriberGroupEmitter, options) {
        this.subscriberGroupEmitter = subscriberGroupEmitter;
        this.options = options;
        this.shardedSubscribers = new Map();
        this.clusterSlots = [];
        // Simple [min, max] slot ranges aren't enough because you can migrate single slots
        this.subscriberToSlotsIndex = new Map();
        this.channels = new Map();
        this.failedAttemptsByNode = new Map();
        // Only latest pending reset kept; throttled by refreshSlotsCache's isRefreshing + backoff delay
        this.isResetting = false;
        this.pendingReset = null;
        /**
         * Handles failed subscriber connections by emitting an event to refresh the slots cache
         * after a backoff period.
         *
         * @param error
         * @param nodeKey
         */
        this.handleSubscriberConnectFailed = (error, nodeKey) => {
            const currentAttempts = this.failedAttemptsByNode.get(nodeKey) || 0;
            const failedAttempts = currentAttempts + 1;
            this.failedAttemptsByNode.set(nodeKey, failedAttempts);
            const attempts = Math.min(failedAttempts, ClusterSubscriberGroup.MAX_RETRY_ATTEMPTS);
            const backoff = Math.min(ClusterSubscriberGroup.BASE_BACKOFF_MS * 2 ** attempts, ClusterSubscriberGroup.MAX_BACKOFF_MS);
            const jitter = Math.floor((Math.random() - 0.5) * (backoff * 0.5));
            const delay = Math.max(0, backoff + jitter);
            debug("Failed to connect subscriber for %s. Refreshing slots in %dms", nodeKey, delay);
            this.subscriberGroupEmitter.emit("subscriberConnectFailed", {
                delay,
                error,
            });
        };
        /**
         * Handles successful subscriber connections by resetting the failed attempts counter.
         *
         * @param nodeKey
         */
        this.handleSubscriberConnectSucceeded = (nodeKey) => {
            this.failedAttemptsByNode.delete(nodeKey);
        };
    }
    /**
     * Get the responsible subscriber.
     *
     * @param slot
     */
    getResponsibleSubscriber(slot) {
        const nodeKey = this.clusterSlots[slot][0];
        const sub = this.shardedSubscribers.get(nodeKey);
        if (sub && sub.subscriberStatus === "idle") {
            sub
                .start()
                .then(() => {
                this.handleSubscriberConnectSucceeded(sub.getNodeKey());
            })
                .catch((err) => {
                this.handleSubscriberConnectFailed(err, sub.getNodeKey());
            });
        }
        return sub;
    }
    /**
     * Adds a channel for which this subscriber group is responsible
     *
     * @param channels
     */
    addChannels(channels) {
        const slot = calculateSlot(channels[0]);
        // Check if the all channels belong to the same slot and otherwise reject the operation
        for (const c of channels) {
            if (calculateSlot(c) !== slot) {
                return -1;
            }
        }
        const currChannels = this.channels.get(slot);
        if (!currChannels) {
            this.channels.set(slot, channels);
        }
        else {
            this.channels.set(slot, currChannels.concat(channels));
        }
        return Array.from(this.channels.values()).reduce((sum, array) => sum + array.length, 0);
    }
    /**
     * Removes channels for which the subscriber group is responsible by optionally unsubscribing
     * @param channels
     */
    removeChannels(channels) {
        const slot = calculateSlot(channels[0]);
        // Check if the all channels belong to the same slot and otherwise reject the operation
        for (const c of channels) {
            if (calculateSlot(c) !== slot) {
                return -1;
            }
        }
        const slotChannels = this.channels.get(slot);
        if (slotChannels) {
            const updatedChannels = slotChannels.filter((c) => !channels.includes(c));
            this.channels.set(slot, updatedChannels);
        }
        return Array.from(this.channels.values()).reduce((sum, array) => sum + array.length, 0);
    }
    /**
     * Disconnect all subscribers and clear some of the internal state.
     */
    stop() {
        for (const s of this.shardedSubscribers.values()) {
            s.stop();
        }
        // Clear subscriber instances and pending operations.
        // Channels are preserved for resubscription on reconnect.
        this.pendingReset = null;
        this.shardedSubscribers.clear();
        this.subscriberToSlotsIndex.clear();
    }
    /**
     * Start all not yet started subscribers
     */
    start() {
        const startPromises = [];
        for (const s of this.shardedSubscribers.values()) {
            if (this.shouldStartSubscriber(s)) {
                startPromises.push(s
                    .start()
                    .then(() => {
                    this.handleSubscriberConnectSucceeded(s.getNodeKey());
                })
                    .catch((err) => {
                    this.handleSubscriberConnectFailed(err, s.getNodeKey());
                }));
                this.subscriberGroupEmitter.emit("+subscriber");
            }
        }
        return Promise.all(startPromises);
    }
    /**
     * Resets the subscriber group by disconnecting all subscribers that are no longer needed and connecting new ones.
     */
    async reset(clusterSlots, clusterNodes) {
        if (this.isResetting) {
            this.pendingReset = { slots: clusterSlots, nodes: clusterNodes };
            return;
        }
        this.isResetting = true;
        try {
            const hasTopologyChanged = this._refreshSlots(clusterSlots);
            const hasFailedSubscribers = this.hasUnhealthySubscribers();
            if (!hasTopologyChanged && !hasFailedSubscribers) {
                debug("No topology change detected or failed subscribers. Skipping reset.");
                return;
            }
            // For each of the sharded subscribers
            for (const [nodeKey, shardedSubscriber] of this.shardedSubscribers) {
                if (
                // If the subscriber is still responsible for a slot range and is healthy then keep it
                this.subscriberToSlotsIndex.has(nodeKey) &&
                    shardedSubscriber.isHealthy()) {
                    debug("Skipping deleting subscriber for %s", nodeKey);
                    continue;
                }
                debug("Removing subscriber for %s", nodeKey);
                // Otherwise stop the subscriber and remove it
                shardedSubscriber.stop();
                this.shardedSubscribers.delete(nodeKey);
                this.subscriberGroupEmitter.emit("-subscriber");
            }
            const startPromises = [];
            // For each node in slots cache
            for (const [nodeKey, _] of this.subscriberToSlotsIndex) {
                const existingSubscriber = this.shardedSubscribers.get(nodeKey);
                // If we already have a subscriber for this node, only ensure it is healthy
                // when it now owns slots with active channel subscriptions.
                if (existingSubscriber && existingSubscriber.isHealthy()) {
                    debug("Skipping creating new subscriber for %s", nodeKey);
                    if (!existingSubscriber.isStarted() &&
                        this.shouldStartSubscriber(existingSubscriber)) {
                        startPromises.push(existingSubscriber
                            .start()
                            .then(() => {
                            this.handleSubscriberConnectSucceeded(nodeKey);
                        })
                            .catch((error) => {
                            this.handleSubscriberConnectFailed(error, nodeKey);
                        }));
                    }
                    continue;
                }
                // If we have an existing subscriber but it is not healthy, stop it
                if (existingSubscriber && !existingSubscriber.isHealthy()) {
                    debug("Replacing subscriber for %s", nodeKey);
                    existingSubscriber.stop();
                    this.shardedSubscribers.delete(nodeKey);
                    this.subscriberGroupEmitter.emit("-subscriber");
                }
                debug("Creating new subscriber for %s", nodeKey);
                // Otherwise create a new subscriber
                const redis = clusterNodes.find((node) => {
                    return (0, util_1.getNodeKey)(node.options) === nodeKey;
                });
                if (!redis) {
                    debug("Failed to find node for key %s", nodeKey);
                    continue;
                }
                const sub = new ShardedSubscriber_1.default(this.subscriberGroupEmitter, redis.options, this.options.redisOptions);
                this.shardedSubscribers.set(nodeKey, sub);
                if (this.shouldStartSubscriber(sub)) {
                    startPromises.push(sub
                        .start()
                        .then(() => {
                        this.handleSubscriberConnectSucceeded(nodeKey);
                    })
                        .catch((error) => {
                        this.handleSubscriberConnectFailed(error, nodeKey);
                    }));
                }
                this.subscriberGroupEmitter.emit("+subscriber");
            }
            // It's vital to await the start promises before resubscribing
            // Otherwise we might try to resubscribe to a subscriber that is not yet connected
            // This can cause a race condition
            await Promise.all(startPromises);
            this._resubscribe();
            this.subscriberGroupEmitter.emit("subscribersReady");
        }
        finally {
            this.isResetting = false;
            if (this.pendingReset) {
                const { slots, nodes } = this.pendingReset;
                this.pendingReset = null;
                await this.reset(slots, nodes);
            }
        }
    }
    /**
     * Refreshes the subscriber-related slot ranges
     *
     * Returns false if no refresh was needed
     *
     * @param targetSlots
     */
    _refreshSlots(targetSlots) {
        //If there was an actual change, then reassign the slot ranges
        // Also rebuild if subscriberToSlotsIndex is empty (e.g., after stop() was called)
        if (this._slotsAreEqual(targetSlots) && this.subscriberToSlotsIndex.size > 0) {
            debug("Nothing to refresh because the new cluster map is equal to the previous one.");
            return false;
        }
        debug("Refreshing the slots of the subscriber group.");
        //Rebuild the slots index
        this.subscriberToSlotsIndex = new Map();
        for (let slot = 0; slot < targetSlots.length; slot++) {
            const node = targetSlots[slot][0];
            if (!this.subscriberToSlotsIndex.has(node)) {
                this.subscriberToSlotsIndex.set(node, []);
            }
            this.subscriberToSlotsIndex.get(node).push(Number(slot));
        }
        //Update the cached slots map
        this.clusterSlots = JSON.parse(JSON.stringify(targetSlots));
        return true;
    }
    /**
     * Resubscribes to the previous channels
     *
     * @private
     */
    _resubscribe() {
        if (this.shardedSubscribers) {
            this.shardedSubscribers.forEach((s, nodeKey) => {
                const subscriberSlots = this.subscriberToSlotsIndex.get(nodeKey);
                if (subscriberSlots) {
                    //Resubscribe on the underlying connection
                    subscriberSlots.forEach((ss) => {
                        //Might return null if being disconnected
                        const redis = s.getInstance();
                        const channels = this.channels.get(ss);
                        if (channels && channels.length > 0) {
                            if (!redis || redis.status === "end") {
                                return;
                            }
                            if (redis.status === "ready") {
                                redis.ssubscribe(...channels).catch((err) => {
                                    // TODO: Should we emit an error event here?
                                    debug("Failed to ssubscribe on node %s: %s", nodeKey, err);
                                });
                            }
                            else {
                                redis.once("ready", () => {
                                    redis.ssubscribe(...channels).catch((err) => {
                                        // TODO: Should we emit an error event here?
                                        debug("Failed to ssubscribe on node %s: %s", nodeKey, err);
                                    });
                                });
                            }
                        }
                    });
                }
            });
        }
    }
    /**
     * Deep equality of the cluster slots objects
     *
     * @param other
     * @private
     */
    _slotsAreEqual(other) {
        if (this.clusterSlots === undefined) {
            return false;
        }
        else {
            return JSON.stringify(this.clusterSlots) === JSON.stringify(other);
        }
    }
    /**
     * Checks if any subscribers are in an unhealthy state.
     *
     * A subscriber is considered unhealthy if:
     * - It exists but is not started (failed/disconnected)
     * - It's missing entirely for a node that should have one
     *
     * @returns true if any subscribers need to be recreated
     */
    hasUnhealthySubscribers() {
        const hasFailedSubscribers = Array.from(this.shardedSubscribers.values()).some((sub) => !sub.isHealthy());
        const hasMissingSubscribers = Array.from(this.subscriberToSlotsIndex.keys()).some((nodeKey) => !this.shardedSubscribers.has(nodeKey));
        return hasFailedSubscribers || hasMissingSubscribers;
    }
    shouldStartSubscriber(sub) {
        if (sub.isStarted()) {
            return false;
        }
        if (!sub.isLazyConnect()) {
            return true;
        }
        const subscriberSlots = this.subscriberToSlotsIndex.get(sub.getNodeKey());
        if (!subscriberSlots) {
            return false;
        }
        return subscriberSlots.some((slot) => {
            const channels = this.channels.get(slot);
            return Boolean(channels && channels.length > 0);
        });
    }
 }
 exports.default = ClusterSubscriberGroup;
 // Retry strategy
 ClusterSubscriberGroup.MAX_RETRY_ATTEMPTS = 10;
 ClusterSubscriberGroup.MAX_BACKOFF_MS = 2000;
 ClusterSubscriberGroup.BASE_BACKOFF_MS = 100;
--- a/backend/node_modules/ioredis/built/cluster/ConnectionPool.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/ConnectionPool.d.ts
@@ -0,0 +1,37 @@
 /// <reference types="node" />
 import { EventEmitter } from "events";
 import { RedisOptions, NodeKey, NodeRole } from "./util";
 import Redis from "../Redis";
 export default class ConnectionPool extends EventEmitter {
    private redisOptions;
    private nodes;
    private specifiedOptions;
    constructor(redisOptions: any);
    getNodes(role?: NodeRole): Redis[];
    getInstanceByKey(key: NodeKey): Redis;
    getSampleInstance(role: NodeRole): Redis;
    /**
     * Add a master node to the pool
     * @param node
     */
    addMasterNode(node: RedisOptions): boolean;
    /**
     * Creates a Redis connection instance from the node options
     * @param node
     * @param readOnly
     */
    createRedisFromOptions(node: RedisOptions, readOnly: boolean): Redis;
    /**
     * Find or create a connection to the node
     */
    findOrCreate(node: RedisOptions, readOnly?: boolean): Redis;
    /**
     * Reset the pool with a set of nodes.
     * The old node will be removed.
     */
    reset(nodes: RedisOptions[]): void;
    /**
     * Remove a node from the pool.
     */
    private removeNode;
 }
--- a/backend/node_modules/ioredis/built/cluster/ConnectionPool.js
+++ b/backend/node_modules/ioredis/built/cluster/ConnectionPool.js
@@ -0,0 +1,154 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const events_1 = require("events");
 const utils_1 = require("../utils");
 const util_1 = require("./util");
 const Redis_1 = require("../Redis");
 const debug = (0, utils_1.Debug)("cluster:connectionPool");
 class ConnectionPool extends events_1.EventEmitter {
    constructor(redisOptions) {
        super();
        this.redisOptions = redisOptions;
        // master + slave = all
        this.nodes = {
            all: {},
            master: {},
            slave: {},
        };
        this.specifiedOptions = {};
    }
    getNodes(role = "all") {
        const nodes = this.nodes[role];
        return Object.keys(nodes).map((key) => nodes[key]);
    }
    getInstanceByKey(key) {
        return this.nodes.all[key];
    }
    getSampleInstance(role) {
        const keys = Object.keys(this.nodes[role]);
        const sampleKey = (0, utils_1.sample)(keys);
        return this.nodes[role][sampleKey];
    }
    /**
     * Add a master node to the pool
     * @param node
     */
    addMasterNode(node) {
        const key = (0, util_1.getNodeKey)(node.options);
        const redis = this.createRedisFromOptions(node, node.options.readOnly);
        //Master nodes aren't read-only
        if (!node.options.readOnly) {
            this.nodes.all[key] = redis;
            this.nodes.master[key] = redis;
            return true;
        }
        return false;
    }
    /**
     * Creates a Redis connection instance from the node options
     * @param node
     * @param readOnly
     */
    createRedisFromOptions(node, readOnly) {
        const redis = new Redis_1.default((0, utils_1.defaults)({
            // Never try to reconnect when a node is lose,
            // instead, waiting for a `MOVED` error and
            // fetch the slots again.
            retryStrategy: null,
            // Offline queue should be enabled so that
            // we don't need to wait for the `ready` event
            // before sending commands to the node.
            enableOfflineQueue: true,
            readOnly: readOnly,
        }, node, this.redisOptions, { lazyConnect: true }));
        return redis;
    }
    /**
     * Find or create a connection to the node
     */
    findOrCreate(node, readOnly = false) {
        const key = (0, util_1.getNodeKey)(node);
        readOnly = Boolean(readOnly);
        if (this.specifiedOptions[key]) {
            Object.assign(node, this.specifiedOptions[key]);
        }
        else {
            this.specifiedOptions[key] = node;
        }
        let redis;
        if (this.nodes.all[key]) {
            redis = this.nodes.all[key];
            if (redis.options.readOnly !== readOnly) {
                redis.options.readOnly = readOnly;
                debug("Change role of %s to %s", key, readOnly ? "slave" : "master");
                redis[readOnly ? "readonly" : "readwrite"]().catch(utils_1.noop);
                if (readOnly) {
                    delete this.nodes.master[key];
                    this.nodes.slave[key] = redis;
                }
                else {
                    delete this.nodes.slave[key];
                    this.nodes.master[key] = redis;
                }
            }
        }
        else {
            debug("Connecting to %s as %s", key, readOnly ? "slave" : "master");
            redis = this.createRedisFromOptions(node, readOnly);
            this.nodes.all[key] = redis;
            this.nodes[readOnly ? "slave" : "master"][key] = redis;
            redis.once("end", () => {
                this.removeNode(key);
                this.emit("-node", redis, key);
                if (!Object.keys(this.nodes.all).length) {
                    this.emit("drain");
                }
            });
            this.emit("+node", redis, key);
            redis.on("error", function (error) {
                this.emit("nodeError", error, key);
            });
        }
        return redis;
    }
    /**
     * Reset the pool with a set of nodes.
     * The old node will be removed.
     */
    reset(nodes) {
        debug("Reset with %O", nodes);
        const newNodes = {};
        nodes.forEach((node) => {
            const key = (0, util_1.getNodeKey)(node);
            // Don't override the existing (master) node
            // when the current one is slave.
            if (!(node.readOnly && newNodes[key])) {
                newNodes[key] = node;
            }
        });
        Object.keys(this.nodes.all).forEach((key) => {
            if (!newNodes[key]) {
                debug("Disconnect %s because the node does not hold any slot", key);
                this.nodes.all[key].disconnect();
                this.removeNode(key);
            }
        });
        Object.keys(newNodes).forEach((key) => {
            const node = newNodes[key];
            this.findOrCreate(node, node.readOnly);
        });
    }
    /**
     * Remove a node from the pool.
     */
    removeNode(key) {
        const { nodes } = this;
        if (nodes.all[key]) {
            debug("Remove %s from the pool", key);
            delete nodes.all[key];
        }
        delete nodes.master[key];
        delete nodes.slave[key];
    }
 }
 exports.default = ConnectionPool;
--- a/backend/node_modules/ioredis/built/cluster/DelayQueue.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/DelayQueue.d.ts
@@ -0,0 +1,20 @@
 export interface DelayQueueOptions {
    callback?: Function;
    timeout: number;
 }
 /**
 * Queue that runs items after specified duration
 */
 export default class DelayQueue {
    private queues;
    private timeouts;
    /**
     * Add a new item to the queue
     *
     * @param bucket bucket name
     * @param item function that will run later
     * @param options
     */
    push(bucket: string, item: Function, options: DelayQueueOptions): void;
    private execute;
 }
--- a/backend/node_modules/ioredis/built/cluster/DelayQueue.js
+++ b/backend/node_modules/ioredis/built/cluster/DelayQueue.js
@@ -0,0 +1,53 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const utils_1 = require("../utils");
 const Deque = require("denque");
 const debug = (0, utils_1.Debug)("delayqueue");
 /**
 * Queue that runs items after specified duration
 */
 class DelayQueue {
    constructor() {
        this.queues = {};
        this.timeouts = {};
    }
    /**
     * Add a new item to the queue
     *
     * @param bucket bucket name
     * @param item function that will run later
     * @param options
     */
    push(bucket, item, options) {
        const callback = options.callback || process.nextTick;
        if (!this.queues[bucket]) {
            this.queues[bucket] = new Deque();
        }
        const queue = this.queues[bucket];
        queue.push(item);
        if (!this.timeouts[bucket]) {
            this.timeouts[bucket] = setTimeout(() => {
                callback(() => {
                    this.timeouts[bucket] = null;
                    this.execute(bucket);
                });
            }, options.timeout);
        }
    }
    execute(bucket) {
        const queue = this.queues[bucket];
        if (!queue) {
            return;
        }
        const { length } = queue;
        if (!length) {
            return;
        }
        debug("send %d commands in %s queue", length, bucket);
        this.queues[bucket] = null;
        while (queue.length > 0) {
            queue.shift()();
        }
    }
 }
 exports.default = DelayQueue;
--- a/backend/node_modules/ioredis/built/cluster/ShardedSubscriber.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/ShardedSubscriber.d.ts
@@ -0,0 +1,36 @@
 /// <reference types="node" />
 import EventEmitter = require("events");
 import { RedisOptions } from "./util";
 import Redis from "../Redis";
 import { ClusterOptions } from "./ClusterOptions";
 declare const SubscriberStatus: {
    readonly IDLE: "idle";
    readonly STARTING: "starting";
    readonly CONNECTED: "connected";
    readonly STOPPING: "stopping";
    readonly ENDED: "ended";
 };
 declare type SubscriberStatus = typeof SubscriberStatus[keyof typeof SubscriberStatus];
 export default class ShardedSubscriber {
    private readonly emitter;
    private readonly nodeKey;
    private status;
    private instance;
    private connectPromise;
    private lazyConnect;
    private readonly messageListeners;
    constructor(emitter: EventEmitter, options: RedisOptions, redisOptions?: ClusterOptions["redisOptions"]);
    start(): Promise<void>;
    stop(): void;
    isStarted(): boolean;
    get subscriberStatus(): SubscriberStatus;
    isHealthy(): boolean;
    getInstance(): Redis | null;
    getNodeKey(): string;
    isLazyConnect(): boolean;
    private onEnd;
    private onError;
    private onMoved;
    private updateStatus;
 }
 export {};
--- a/backend/node_modules/ioredis/built/cluster/ShardedSubscriber.js
+++ b/backend/node_modules/ioredis/built/cluster/ShardedSubscriber.js
@@ -0,0 +1,147 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const util_1 = require("./util");
 const utils_1 = require("../utils");
 const Redis_1 = require("../Redis");
 const debug = (0, utils_1.Debug)("cluster:subscriberGroup:shardedSubscriber");
 const SubscriberStatus = {
    IDLE: "idle",
    STARTING: "starting",
    CONNECTED: "connected",
    STOPPING: "stopping",
    ENDED: "ended",
 };
 const ALLOWED_STATUS_UPDATES = {
    [SubscriberStatus.IDLE]: [
        SubscriberStatus.STARTING,
        SubscriberStatus.STOPPING,
        SubscriberStatus.ENDED,
    ],
    [SubscriberStatus.STARTING]: [
        SubscriberStatus.CONNECTED,
        SubscriberStatus.STOPPING,
        SubscriberStatus.ENDED,
    ],
    [SubscriberStatus.CONNECTED]: [
        SubscriberStatus.STOPPING,
        SubscriberStatus.ENDED,
    ],
    [SubscriberStatus.STOPPING]: [SubscriberStatus.ENDED],
    [SubscriberStatus.ENDED]: [],
 };
 class ShardedSubscriber {
    constructor(emitter, options, redisOptions) {
        var _a;
        this.emitter = emitter;
        this.status = SubscriberStatus.IDLE;
        this.instance = null;
        this.connectPromise = null;
        // Store listener references for cleanup
        this.messageListeners = new Map();
        this.onEnd = () => {
            this.updateStatus(SubscriberStatus.ENDED);
            this.emitter.emit("-node", this.instance, this.nodeKey);
        };
        this.onError = (error) => {
            this.emitter.emit("nodeError", error, this.nodeKey);
        };
        this.onMoved = () => {
            this.emitter.emit("moved");
        };
        this.instance = new Redis_1.default((0, utils_1.defaults)({
            enableReadyCheck: false,
            enableOfflineQueue: true,
            connectionName: (0, util_1.getConnectionName)("ssubscriber", options.connectionName),
            /**
             * Disable auto reconnection for subscribers.
             * The ClusterSubscriberGroup will handle the reconnection.
             */
            retryStrategy: null,
            lazyConnect: true,
        }, options, redisOptions));
        this.lazyConnect = (_a = redisOptions === null || redisOptions === void 0 ? void 0 : redisOptions.lazyConnect) !== null && _a !== void 0 ? _a : true;
        this.nodeKey = (0, util_1.getNodeKey)(options);
        // Register listeners
        this.instance.on("end", this.onEnd);
        this.instance.on("error", this.onError);
        this.instance.on("moved", this.onMoved);
        for (const event of ["smessage", "smessageBuffer"]) {
            const listener = (...args) => {
                this.emitter.emit(event, ...args);
            };
            this.messageListeners.set(event, listener);
            this.instance.on(event, listener);
        }
    }
    async start() {
        if (this.connectPromise) {
            return this.connectPromise;
        }
        if (this.status === SubscriberStatus.STARTING ||
            this.status === SubscriberStatus.CONNECTED) {
            return;
        }
        if (this.status === SubscriberStatus.ENDED || !this.instance) {
            throw new Error(`Sharded subscriber ${this.nodeKey} cannot be restarted once ended.`);
        }
        this.updateStatus(SubscriberStatus.STARTING);
        this.connectPromise = this.instance.connect();
        try {
            await this.connectPromise;
            this.updateStatus(SubscriberStatus.CONNECTED);
        }
        catch (err) {
            this.updateStatus(SubscriberStatus.ENDED);
            throw err;
        }
        finally {
            this.connectPromise = null;
        }
    }
    stop() {
        this.updateStatus(SubscriberStatus.STOPPING);
        if (this.instance) {
            this.instance.disconnect();
            this.instance.removeAllListeners();
            this.messageListeners.clear();
            this.instance = null;
        }
        this.updateStatus(SubscriberStatus.ENDED);
        debug("stopped %s", this.nodeKey);
    }
    isStarted() {
        return [
            SubscriberStatus.CONNECTED,
            SubscriberStatus.STARTING,
        ].includes(this.status);
    }
    get subscriberStatus() {
        return this.status;
    }
    isHealthy() {
        return ((this.status === SubscriberStatus.IDLE ||
            this.status === SubscriberStatus.CONNECTED ||
            this.status === SubscriberStatus.STARTING) &&
            this.instance !== null);
    }
    getInstance() {
        return this.instance;
    }
    getNodeKey() {
        return this.nodeKey;
    }
    isLazyConnect() {
        return this.lazyConnect;
    }
    updateStatus(nextStatus) {
        if (this.status === nextStatus) {
            return;
        }
        if (!ALLOWED_STATUS_UPDATES[this.status].includes(nextStatus)) {
            debug("Invalid status transition for %s: %s -> %s", this.nodeKey, this.status, nextStatus);
            return;
        }
        this.status = nextStatus;
    }
 }
 exports.default = ShardedSubscriber;
--- a/backend/node_modules/ioredis/built/cluster/index.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/index.d.ts
@@ -0,0 +1,163 @@
 /// <reference types="node" />
 import { EventEmitter } from "events";
 import Command from "../Command";
 import Redis from "../Redis";
 import ScanStream from "../ScanStream";
 import { Transaction } from "../transaction";
 import { Callback, ScanStreamOptions, WriteableStream } from "../types";
 import Commander from "../utils/Commander";
 import { ClusterOptions } from "./ClusterOptions";
 import { NodeKey, NodeRole } from "./util";
 export declare type ClusterNode = string | number | {
    host?: string | undefined;
    port?: number | undefined;
 };
 declare type ClusterStatus = "end" | "close" | "wait" | "connecting" | "connect" | "ready" | "reconnecting" | "disconnecting";
 /**
 * Client for the official Redis Cluster
 */
 declare class Cluster extends Commander {
    options: ClusterOptions;
    slots: NodeKey[][];
    status: ClusterStatus;
    /**
     * @ignore
     */
    _groupsIds: {
        [key: string]: number;
    };
    /**
     * @ignore
     */
    _groupsBySlot: number[];
    /**
     * @ignore
     */
    isCluster: boolean;
    private startupNodes;
    private connectionPool;
    private manuallyClosing;
    private retryAttempts;
    private delayQueue;
    private offlineQueue;
    private subscriber;
    private shardedSubscribers;
    private slotsTimer;
    private reconnectTimeout;
    private isRefreshing;
    private _refreshSlotsCacheCallbacks;
    private _autoPipelines;
    private _runningAutoPipelines;
    private _readyDelayedCallbacks;
    private subscriberGroupEmitter;
    /**
     * Every time Cluster#connect() is called, this value will be
     * auto-incrementing. The purpose of this value is used for
     * discarding previous connect attampts when creating a new
     * connection.
     */
    private connectionEpoch;
    /**
     * Creates an instance of Cluster.
     */
    constructor(startupNodes: ClusterNode[], options?: ClusterOptions);
    /**
     * Connect to a cluster
     */
    connect(): Promise<void>;
    /**
     * Disconnect from every node in the cluster.
     */
    disconnect(reconnect?: boolean): void;
    /**
     * Quit the cluster gracefully.
     */
    quit(callback?: Callback<"OK">): Promise<"OK">;
    /**
     * Create a new instance with the same startup nodes and options as the current one.
     *
     * @example
     * ```js
     * var cluster = new Redis.Cluster([{ host: "127.0.0.1", port: "30001" }]);
     * var anotherCluster = cluster.duplicate();
     * ```
     */
    duplicate(overrideStartupNodes?: any[], overrideOptions?: {}): Cluster;
    /**
     * Get nodes with the specified role
     */
    nodes(role?: NodeRole): Redis[];
    /**
     * This is needed in order not to install a listener for each auto pipeline
     *
     * @ignore
     */
    delayUntilReady(callback: Callback): void;
    /**
     * Get the number of commands queued in automatic pipelines.
     *
     * This is not available (and returns 0) until the cluster is connected and slots information have been received.
     */
    get autoPipelineQueueSize(): number;
    /**
     * Refresh the slot cache
     *
     * @ignore
     */
    refreshSlotsCache(callback?: Callback<void>): void;
    /**
     * @ignore
     */
    sendCommand(command: Command, stream?: WriteableStream, node?: any): unknown;
    sscanStream(key: string, options?: ScanStreamOptions): ScanStream;
    sscanBufferStream(key: string, options?: ScanStreamOptions): ScanStream;
    hscanStream(key: string, options?: ScanStreamOptions): ScanStream;
    hscanBufferStream(key: string, options?: ScanStreamOptions): ScanStream;
    zscanStream(key: string, options?: ScanStreamOptions): ScanStream;
    zscanBufferStream(key: string, options?: ScanStreamOptions): ScanStream;
    /**
     * @ignore
     */
    handleError(error: Error, ttl: {
        value?: any;
    }, handlers: any): void;
    private resetOfflineQueue;
    private clearNodesRefreshInterval;
    private resetNodesRefreshInterval;
    /**
     * Change cluster instance's status
     */
    private setStatus;
    /**
     * Called when closed to check whether a reconnection should be made
     */
    private handleCloseEvent;
    /**
     * Flush offline queue with error.
     */
    private flushQueue;
    private executeOfflineCommands;
    private natMapper;
    private getInfoFromNode;
    private invokeReadyDelayedCallbacks;
    /**
     * Check whether Cluster is able to process commands
     */
    private readyCheck;
    private resolveSrv;
    private dnsLookup;
    /**
     * Normalize startup nodes, and resolving hostnames to IPs.
     *
     * This process happens every time when #connect() is called since
     * #startupNodes and DNS records may chanage.
     */
    private resolveStartupNodeHostnames;
    private createScanStream;
    private createShardedSubscriberGroup;
 }
 interface Cluster extends EventEmitter {
 }
 interface Cluster extends Transaction {
 }
 export default Cluster;
--- a/backend/node_modules/ioredis/built/cluster/index.js
+++ b/backend/node_modules/ioredis/built/cluster/index.js
@@ -0,0 +1,937 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const commands_1 = require("@ioredis/commands");
 const events_1 = require("events");
 const redis_errors_1 = require("redis-errors");
 const standard_as_callback_1 = require("standard-as-callback");
 const Command_1 = require("../Command");
 const ClusterAllFailedError_1 = require("../errors/ClusterAllFailedError");
 const Redis_1 = require("../Redis");
 const ScanStream_1 = require("../ScanStream");
 const transaction_1 = require("../transaction");
 const utils_1 = require("../utils");
 const applyMixin_1 = require("../utils/applyMixin");
 const Commander_1 = require("../utils/Commander");
 const ClusterOptions_1 = require("./ClusterOptions");
 const ClusterSubscriber_1 = require("./ClusterSubscriber");
 const ConnectionPool_1 = require("./ConnectionPool");
 const DelayQueue_1 = require("./DelayQueue");
 const util_1 = require("./util");
 const Deque = require("denque");
 const ClusterSubscriberGroup_1 = require("./ClusterSubscriberGroup");
 const debug = (0, utils_1.Debug)("cluster");
 const REJECT_OVERWRITTEN_COMMANDS = new WeakSet();
 /**
 * Client for the official Redis Cluster
 */
 class Cluster extends Commander_1.default {
    /**
     * Creates an instance of Cluster.
     */
    //TODO: Add an option that enables or disables sharded PubSub
    constructor(startupNodes, options = {}) {
        super();
        this.slots = [];
        /**
         * @ignore
         */
        this._groupsIds = {};
        /**
         * @ignore
         */
        this._groupsBySlot = Array(16384);
        /**
         * @ignore
         */
        this.isCluster = true;
        this.retryAttempts = 0;
        this.delayQueue = new DelayQueue_1.default();
        this.offlineQueue = new Deque();
        this.isRefreshing = false;
        this._refreshSlotsCacheCallbacks = [];
        this._autoPipelines = new Map();
        this._runningAutoPipelines = new Set();
        this._readyDelayedCallbacks = [];
        /**
         * Every time Cluster#connect() is called, this value will be
         * auto-incrementing. The purpose of this value is used for
         * discarding previous connect attampts when creating a new
         * connection.
         */
        this.connectionEpoch = 0;
        events_1.EventEmitter.call(this);
        this.startupNodes = startupNodes;
        this.options = (0, utils_1.defaults)({}, options, ClusterOptions_1.DEFAULT_CLUSTER_OPTIONS, this.options);
        if (this.options.shardedSubscribers) {
            this.createShardedSubscriberGroup();
        }
        if (this.options.redisOptions &&
            this.options.redisOptions.keyPrefix &&
            !this.options.keyPrefix) {
            this.options.keyPrefix = this.options.redisOptions.keyPrefix;
        }
        // validate options
        if (typeof this.options.scaleReads !== "function" &&
            ["all", "master", "slave"].indexOf(this.options.scaleReads) === -1) {
            throw new Error('Invalid option scaleReads "' +
                this.options.scaleReads +
                '". Expected "all", "master", "slave" or a custom function');
        }
        this.connectionPool = new ConnectionPool_1.default(this.options.redisOptions);
        this.connectionPool.on("-node", (redis, key) => {
            this.emit("-node", redis);
        });
        this.connectionPool.on("+node", (redis) => {
            this.emit("+node", redis);
        });
        this.connectionPool.on("drain", () => {
            this.setStatus("close");
        });
        this.connectionPool.on("nodeError", (error, key) => {
            this.emit("node error", error, key);
        });
        this.subscriber = new ClusterSubscriber_1.default(this.connectionPool, this);
        if (this.options.scripts) {
            Object.entries(this.options.scripts).forEach(([name, definition]) => {
                this.defineCommand(name, definition);
            });
        }
        if (this.options.lazyConnect) {
            this.setStatus("wait");
        }
        else {
            this.connect().catch((err) => {
                debug("connecting failed: %s", err);
            });
        }
    }
    /**
     * Connect to a cluster
     */
    connect() {
        return new Promise((resolve, reject) => {
            if (this.status === "connecting" ||
                this.status === "connect" ||
                this.status === "ready") {
                reject(new Error("Redis is already connecting/connected"));
                return;
            }
            const epoch = ++this.connectionEpoch;
            this.setStatus("connecting");
            this.resolveStartupNodeHostnames()
                .then((nodes) => {
                if (this.connectionEpoch !== epoch) {
                    debug("discard connecting after resolving startup nodes because epoch not match: %d != %d", epoch, this.connectionEpoch);
                    reject(new redis_errors_1.RedisError("Connection is discarded because a new connection is made"));
                    return;
                }
                if (this.status !== "connecting") {
                    debug("discard connecting after resolving startup nodes because the status changed to %s", this.status);
                    reject(new redis_errors_1.RedisError("Connection is aborted"));
                    return;
                }
                this.connectionPool.reset(nodes);
                if (this.options.shardedSubscribers) {
                    this.shardedSubscribers
                        .reset(this.slots, this.connectionPool.getNodes("all"))
                        .catch((err) => {
                        // TODO should we emit an error event here?
                        debug("Error while starting subscribers: %s", err);
                    });
                }
                const readyHandler = () => {
                    this.setStatus("ready");
                    this.retryAttempts = 0;
                    this.executeOfflineCommands();
                    this.resetNodesRefreshInterval();
                    resolve();
                };
                let closeListener = undefined;
                const refreshListener = () => {
                    this.invokeReadyDelayedCallbacks(undefined);
                    this.removeListener("close", closeListener);
                    this.manuallyClosing = false;
                    this.setStatus("connect");
                    if (this.options.enableReadyCheck) {
                        this.readyCheck((err, fail) => {
                            if (err || fail) {
                                debug("Ready check failed (%s). Reconnecting...", err || fail);
                                if (this.status === "connect") {
                                    this.disconnect(true);
                                }
                            }
                            else {
                                readyHandler();
                            }
                        });
                    }
                    else {
                        readyHandler();
                    }
                };
                closeListener = () => {
                    const error = new Error("None of startup nodes is available");
                    this.removeListener("refresh", refreshListener);
                    this.invokeReadyDelayedCallbacks(error);
                    reject(error);
                };
                this.once("refresh", refreshListener);
                this.once("close", closeListener);
                this.once("close", this.handleCloseEvent.bind(this));
                this.refreshSlotsCache((err) => {
                    if (err && err.message === ClusterAllFailedError_1.default.defaultMessage) {
                        Redis_1.default.prototype.silentEmit.call(this, "error", err);
                        this.connectionPool.reset([]);
                    }
                });
                this.subscriber.start();
                if (this.options.shardedSubscribers) {
                    this.shardedSubscribers.start().catch((err) => {
                        // TODO should we emit an error event here?
                        debug("Error while starting subscribers: %s", err);
                    });
                }
            })
                .catch((err) => {
                this.setStatus("close");
                this.handleCloseEvent(err);
                this.invokeReadyDelayedCallbacks(err);
                reject(err);
            });
        });
    }
    /**
     * Disconnect from every node in the cluster.
     */
    disconnect(reconnect = false) {
        const status = this.status;
        this.setStatus("disconnecting");
        if (!reconnect) {
            this.manuallyClosing = true;
        }
        if (this.reconnectTimeout && !reconnect) {
            clearTimeout(this.reconnectTimeout);
            this.reconnectTimeout = null;
            debug("Canceled reconnecting attempts");
        }
        this.clearNodesRefreshInterval();
        this.subscriber.stop();
        if (this.options.shardedSubscribers) {
            this.shardedSubscribers.stop();
        }
        if (status === "wait") {
            this.setStatus("close");
            this.handleCloseEvent();
        }
        else {
            this.connectionPool.reset([]);
        }
    }
    /**
     * Quit the cluster gracefully.
     */
    quit(callback) {
        const status = this.status;
        this.setStatus("disconnecting");
        this.manuallyClosing = true;
        if (this.reconnectTimeout) {
            clearTimeout(this.reconnectTimeout);
            this.reconnectTimeout = null;
        }
        this.clearNodesRefreshInterval();
        this.subscriber.stop();
        if (this.options.shardedSubscribers) {
            this.shardedSubscribers.stop();
        }
        if (status === "wait") {
            const ret = (0, standard_as_callback_1.default)(Promise.resolve("OK"), callback);
            // use setImmediate to make sure "close" event
            // being emitted after quit() is returned
            setImmediate(function () {
                this.setStatus("close");
                this.handleCloseEvent();
            }.bind(this));
            return ret;
        }
        return (0, standard_as_callback_1.default)(Promise.all(this.nodes().map((node) => node.quit().catch((err) => {
            // Ignore the error caused by disconnecting since
            // we're disconnecting...
            if (err.message === utils_1.CONNECTION_CLOSED_ERROR_MSG) {
                return "OK";
            }
            throw err;
        }))).then(() => "OK"), callback);
    }
    /**
     * Create a new instance with the same startup nodes and options as the current one.
     *
     * @example
     * ```js
     * var cluster = new Redis.Cluster([{ host: "127.0.0.1", port: "30001" }]);
     * var anotherCluster = cluster.duplicate();
     * ```
     */
    duplicate(overrideStartupNodes = [], overrideOptions = {}) {
        const startupNodes = overrideStartupNodes.length > 0
            ? overrideStartupNodes
            : this.startupNodes.slice(0);
        const options = Object.assign({}, this.options, overrideOptions);
        return new Cluster(startupNodes, options);
    }
    /**
     * Get nodes with the specified role
     */
    nodes(role = "all") {
        if (role !== "all" && role !== "master" && role !== "slave") {
            throw new Error('Invalid role "' + role + '". Expected "all", "master" or "slave"');
        }
        return this.connectionPool.getNodes(role);
    }
    /**
     * This is needed in order not to install a listener for each auto pipeline
     *
     * @ignore
     */
    delayUntilReady(callback) {
        this._readyDelayedCallbacks.push(callback);
    }
    /**
     * Get the number of commands queued in automatic pipelines.
     *
     * This is not available (and returns 0) until the cluster is connected and slots information have been received.
     */
    get autoPipelineQueueSize() {
        let queued = 0;
        for (const pipeline of this._autoPipelines.values()) {
            queued += pipeline.length;
        }
        return queued;
    }
    /**
     * Refresh the slot cache
     *
     * @ignore
     */
    refreshSlotsCache(callback) {
        if (callback) {
            this._refreshSlotsCacheCallbacks.push(callback);
        }
        if (this.isRefreshing) {
            return;
        }
        this.isRefreshing = true;
        const _this = this;
        const wrapper = (error) => {
            this.isRefreshing = false;
            for (const callback of this._refreshSlotsCacheCallbacks) {
                callback(error);
            }
            this._refreshSlotsCacheCallbacks = [];
        };
        const nodes = (0, utils_1.shuffle)(this.connectionPool.getNodes());
        let lastNodeError = null;
        function tryNode(index) {
            if (index === nodes.length) {
                const error = new ClusterAllFailedError_1.default(ClusterAllFailedError_1.default.defaultMessage, lastNodeError);
                return wrapper(error);
            }
            const node = nodes[index];
            const key = `${node.options.host}:${node.options.port}`;
            debug("getting slot cache from %s", key);
            _this.getInfoFromNode(node, function (err) {
                switch (_this.status) {
                    case "close":
                    case "end":
                        return wrapper(new Error("Cluster is disconnected."));
                    case "disconnecting":
                        return wrapper(new Error("Cluster is disconnecting."));
                }
                if (err) {
                    _this.emit("node error", err, key);
                    lastNodeError = err;
                    tryNode(index + 1);
                }
                else {
                    _this.emit("refresh");
                    wrapper();
                }
            });
        }
        tryNode(0);
    }
    /**
     * @ignore
     */
    sendCommand(command, stream, node) {
        if (this.status === "wait") {
            this.connect().catch(utils_1.noop);
        }
        if (this.status === "end") {
            command.reject(new Error(utils_1.CONNECTION_CLOSED_ERROR_MSG));
            return command.promise;
        }
        let to = this.options.scaleReads;
        if (to !== "master") {
            const isCommandReadOnly = command.isReadOnly ||
                ((0, commands_1.exists)(command.name) && (0, commands_1.hasFlag)(command.name, "readonly"));
            if (!isCommandReadOnly) {
                to = "master";
            }
        }
        let targetSlot = node ? node.slot : command.getSlot();
        const ttl = {};
        const _this = this;
        if (!node && !REJECT_OVERWRITTEN_COMMANDS.has(command)) {
            REJECT_OVERWRITTEN_COMMANDS.add(command);
            const reject = command.reject;
            command.reject = function (err) {
                const partialTry = tryConnection.bind(null, true);
                _this.handleError(err, ttl, {
                    moved: function (slot, key) {
                        debug("command %s is moved to %s", command.name, key);
                        targetSlot = Number(slot);
                        if (_this.slots[slot]) {
                            _this.slots[slot][0] = key;
                        }
                        else {
                            _this.slots[slot] = [key];
                        }
                        _this._groupsBySlot[slot] =
                            _this._groupsIds[_this.slots[slot].join(";")];
                        _this.connectionPool.findOrCreate(_this.natMapper(key));
                        tryConnection();
                        debug("refreshing slot caches... (triggered by MOVED error)");
                        _this.refreshSlotsCache();
                    },
                    ask: function (slot, key) {
                        debug("command %s is required to ask %s:%s", command.name, key);
                        const mapped = _this.natMapper(key);
                        _this.connectionPool.findOrCreate(mapped);
                        tryConnection(false, `${mapped.host}:${mapped.port}`);
                    },
                    tryagain: partialTry,
                    clusterDown: partialTry,
                    connectionClosed: partialTry,
                    maxRedirections: function (redirectionError) {
                        reject.call(command, redirectionError);
                    },
                    defaults: function () {
                        reject.call(command, err);
                    },
                });
            };
        }
        tryConnection();
        function tryConnection(random, asking) {
            if (_this.status === "end") {
                command.reject(new redis_errors_1.AbortError("Cluster is ended."));
                return;
            }
            let redis;
            if (_this.status === "ready" || command.name === "cluster") {
                if (node && node.redis) {
                    redis = node.redis;
                }
                else if (Command_1.default.checkFlag("ENTER_SUBSCRIBER_MODE", command.name) ||
                    Command_1.default.checkFlag("EXIT_SUBSCRIBER_MODE", command.name)) {
                    if (_this.options.shardedSubscribers &&
                        (command.name == "ssubscribe" || command.name == "sunsubscribe")) {
                        const sub = _this.shardedSubscribers.getResponsibleSubscriber(targetSlot);
                        if (!sub) {
                            command.reject(new redis_errors_1.AbortError(`No sharded subscriber for slot: ${targetSlot}`));
                            return;
                        }
                        let status = -1;
                        if (command.name == "ssubscribe") {
                            status = _this.shardedSubscribers.addChannels(command.getKeys());
                        }
                        if (command.name == "sunsubscribe") {
                            status = _this.shardedSubscribers.removeChannels(command.getKeys());
                        }
                        if (status !== -1) {
                            redis = sub.getInstance();
                        }
                        else {
                            command.reject(new redis_errors_1.AbortError("Possible CROSSSLOT error: All channels must hash to the same slot"));
                        }
                    }
                    else {
                        redis = _this.subscriber.getInstance();
                    }
                    if (!redis) {
                        command.reject(new redis_errors_1.AbortError("No subscriber for the cluster"));
                        return;
                    }
                }
                else {
                    if (!random) {
                        if (typeof targetSlot === "number" && _this.slots[targetSlot]) {
                            const nodeKeys = _this.slots[targetSlot];
                            if (typeof to === "function") {
                                const nodes = nodeKeys.map(function (key) {
                                    return _this.connectionPool.getInstanceByKey(key);
                                });
                                redis = to(nodes, command);
                                if (Array.isArray(redis)) {
                                    redis = (0, utils_1.sample)(redis);
                                }
                                if (!redis) {
                                    redis = nodes[0];
                                }
                            }
                            else {
                                let key;
                                if (to === "all") {
                                    key = (0, utils_1.sample)(nodeKeys);
                                }
                                else if (to === "slave" && nodeKeys.length > 1) {
                                    key = (0, utils_1.sample)(nodeKeys, 1);
                                }
                                else {
                                    key = nodeKeys[0];
                                }
                                redis = _this.connectionPool.getInstanceByKey(key);
                            }
                        }
                        if (asking) {
                            redis = _this.connectionPool.getInstanceByKey(asking);
                            redis.asking();
                        }
                    }
                    if (!redis) {
                        redis =
                            (typeof to === "function"
                                ? null
                                : _this.connectionPool.getSampleInstance(to)) ||
                                _this.connectionPool.getSampleInstance("all");
                    }
                }
                if (node && !node.redis) {
                    node.redis = redis;
                }
            }
            if (redis) {
                redis.sendCommand(command, stream);
            }
            else if (_this.options.enableOfflineQueue) {
                _this.offlineQueue.push({
                    command: command,
                    stream: stream,
                    node: node,
                });
            }
            else {
                command.reject(new Error("Cluster isn't ready and enableOfflineQueue options is false"));
            }
        }
        return command.promise;
    }
    sscanStream(key, options) {
        return this.createScanStream("sscan", { key, options });
    }
    sscanBufferStream(key, options) {
        return this.createScanStream("sscanBuffer", { key, options });
    }
    hscanStream(key, options) {
        return this.createScanStream("hscan", { key, options });
    }
    hscanBufferStream(key, options) {
        return this.createScanStream("hscanBuffer", { key, options });
    }
    zscanStream(key, options) {
        return this.createScanStream("zscan", { key, options });
    }
    zscanBufferStream(key, options) {
        return this.createScanStream("zscanBuffer", { key, options });
    }
    /**
     * @ignore
     */
    handleError(error, ttl, handlers) {
        if (typeof ttl.value === "undefined") {
            ttl.value = this.options.maxRedirections;
        }
        else {
            ttl.value -= 1;
        }
        if (ttl.value <= 0) {
            handlers.maxRedirections(new Error("Too many Cluster redirections. Last error: " + error));
            return;
        }
        const errv = error.message.split(" ");
        if (errv[0] === "MOVED") {
            const timeout = this.options.retryDelayOnMoved;
            if (timeout && typeof timeout === "number") {
                this.delayQueue.push("moved", handlers.moved.bind(null, errv[1], errv[2]), { timeout });
            }
            else {
                handlers.moved(errv[1], errv[2]);
            }
        }
        else if (errv[0] === "ASK") {
            handlers.ask(errv[1], errv[2]);
        }
        else if (errv[0] === "TRYAGAIN") {
            this.delayQueue.push("tryagain", handlers.tryagain, {
                timeout: this.options.retryDelayOnTryAgain,
            });
        }
        else if (errv[0] === "CLUSTERDOWN" &&
            this.options.retryDelayOnClusterDown > 0) {
            this.delayQueue.push("clusterdown", handlers.connectionClosed, {
                timeout: this.options.retryDelayOnClusterDown,
                callback: this.refreshSlotsCache.bind(this),
            });
        }
        else if (error.message === utils_1.CONNECTION_CLOSED_ERROR_MSG &&
            this.options.retryDelayOnFailover > 0 &&
            this.status === "ready") {
            this.delayQueue.push("failover", handlers.connectionClosed, {
                timeout: this.options.retryDelayOnFailover,
                callback: this.refreshSlotsCache.bind(this),
            });
        }
        else {
            handlers.defaults();
        }
    }
    resetOfflineQueue() {
        this.offlineQueue = new Deque();
    }
    clearNodesRefreshInterval() {
        if (this.slotsTimer) {
            clearTimeout(this.slotsTimer);
            this.slotsTimer = null;
        }
    }
    resetNodesRefreshInterval() {
        if (this.slotsTimer || !this.options.slotsRefreshInterval) {
            return;
        }
        const nextRound = () => {
            this.slotsTimer = setTimeout(() => {
                debug('refreshing slot caches... (triggered by "slotsRefreshInterval" option)');
                this.refreshSlotsCache(() => {
                    nextRound();
                });
            }, this.options.slotsRefreshInterval);
        };
        nextRound();
    }
    /**
     * Change cluster instance's status
     */
    setStatus(status) {
        debug("status: %s -> %s", this.status || "[empty]", status);
        this.status = status;
        process.nextTick(() => {
            this.emit(status);
        });
    }
    /**
     * Called when closed to check whether a reconnection should be made
     */
    handleCloseEvent(reason) {
        var _a;
        if (reason) {
            debug("closed because %s", reason);
        }
        let retryDelay;
        if (!this.manuallyClosing &&
            typeof this.options.clusterRetryStrategy === "function") {
            retryDelay = this.options.clusterRetryStrategy.call(this, ++this.retryAttempts, reason);
        }
        if (typeof retryDelay === "number") {
            this.setStatus("reconnecting");
            this.reconnectTimeout = setTimeout(() => {
                this.reconnectTimeout = null;
                debug("Cluster is disconnected. Retrying after %dms", retryDelay);
                this.connect().catch(function (err) {
                    debug("Got error %s when reconnecting. Ignoring...", err);
                });
            }, retryDelay);
        }
        else {
            if (this.options.shardedSubscribers) {
                (_a = this.subscriberGroupEmitter) === null || _a === void 0 ? void 0 : _a.removeAllListeners();
            }
            this.setStatus("end");
            this.flushQueue(new Error("None of startup nodes is available"));
        }
    }
    /**
     * Flush offline queue with error.
     */
    flushQueue(error) {
        let item;
        while ((item = this.offlineQueue.shift())) {
            item.command.reject(error);
        }
    }
    executeOfflineCommands() {
        if (this.offlineQueue.length) {
            debug("send %d commands in offline queue", this.offlineQueue.length);
            const offlineQueue = this.offlineQueue;
            this.resetOfflineQueue();
            let item;
            while ((item = offlineQueue.shift())) {
                this.sendCommand(item.command, item.stream, item.node);
            }
        }
    }
    natMapper(nodeKey) {
        const key = typeof nodeKey === "string"
            ? nodeKey
            : `${nodeKey.host}:${nodeKey.port}`;
        let mapped = null;
        if (this.options.natMap && typeof this.options.natMap === "function") {
            mapped = this.options.natMap(key);
        }
        else if (this.options.natMap && typeof this.options.natMap === "object") {
            mapped = this.options.natMap[key];
        }
        if (mapped) {
            debug("NAT mapping %s -> %O", key, mapped);
            return Object.assign({}, mapped);
        }
        return typeof nodeKey === "string"
            ? (0, util_1.nodeKeyToRedisOptions)(nodeKey)
            : nodeKey;
    }
    getInfoFromNode(redis, callback) {
        if (!redis) {
            return callback(new Error("Node is disconnected"));
        }
        // Use a duplication of the connection to avoid
        // timeouts when the connection is in the blocking
        // mode (e.g. waiting for BLPOP).
        const duplicatedConnection = redis.duplicate({
            enableOfflineQueue: true,
            enableReadyCheck: false,
            retryStrategy: null,
            connectionName: (0, util_1.getConnectionName)("refresher", this.options.redisOptions && this.options.redisOptions.connectionName),
        });
        // Ignore error events since we will handle
        // exceptions for the CLUSTER SLOTS command.
        duplicatedConnection.on("error", utils_1.noop);
        duplicatedConnection.cluster("SLOTS", (0, utils_1.timeout)((err, result) => {
            duplicatedConnection.disconnect();
            if (err) {
                debug("error encountered running CLUSTER.SLOTS: %s", err);
                return callback(err);
            }
            if (this.status === "disconnecting" ||
                this.status === "close" ||
                this.status === "end") {
                debug("ignore CLUSTER.SLOTS results (count: %d) since cluster status is %s", result.length, this.status);
                callback();
                return;
            }
            const nodes = [];
            debug("cluster slots result count: %d", result.length);
            for (let i = 0; i < result.length; ++i) {
                const items = result[i];
                const slotRangeStart = items[0];
                const slotRangeEnd = items[1];
                const keys = [];
                for (let j = 2; j < items.length; j++) {
                    if (!items[j][0]) {
                        continue;
                    }
                    const node = this.natMapper({
                        host: items[j][0],
                        port: items[j][1],
                    });
                    node.readOnly = j !== 2;
                    nodes.push(node);
                    keys.push(node.host + ":" + node.port);
                }
                debug("cluster slots result [%d]: slots %d~%d served by %s", i, slotRangeStart, slotRangeEnd, keys);
                for (let slot = slotRangeStart; slot <= slotRangeEnd; slot++) {
                    this.slots[slot] = keys;
                }
            }
            // Assign to each node keys a numeric value to make autopipeline comparison faster.
            this._groupsIds = Object.create(null);
            let j = 0;
            for (let i = 0; i < 16384; i++) {
                const target = (this.slots[i] || []).join(";");
                if (!target.length) {
                    this._groupsBySlot[i] = undefined;
                    continue;
                }
                if (!this._groupsIds[target]) {
                    this._groupsIds[target] = ++j;
                }
                this._groupsBySlot[i] = this._groupsIds[target];
            }
            this.connectionPool.reset(nodes);
            if (this.options.shardedSubscribers) {
                this.shardedSubscribers
                    .reset(this.slots, this.connectionPool.getNodes("all"))
                    .catch((err) => {
                    // TODO should we emit an error event here?
                    debug("Error while starting subscribers: %s", err);
                });
            }
            callback();
        }, this.options.slotsRefreshTimeout));
    }
    invokeReadyDelayedCallbacks(err) {
        for (const c of this._readyDelayedCallbacks) {
            process.nextTick(c, err);
        }
        this._readyDelayedCallbacks = [];
    }
    /**
     * Check whether Cluster is able to process commands
     */
    readyCheck(callback) {
        this.cluster("INFO", (err, res) => {
            if (err) {
                return callback(err);
            }
            if (typeof res !== "string") {
                return callback();
            }
            let state;
            const lines = res.split("\r\n");
            for (let i = 0; i < lines.length; ++i) {
                const parts = lines[i].split(":");
                if (parts[0] === "cluster_state") {
                    state = parts[1];
                    break;
                }
            }
            if (state === "fail") {
                debug("cluster state not ok (%s)", state);
                callback(null, state);
            }
            else {
                callback();
            }
        });
    }
    resolveSrv(hostname) {
        return new Promise((resolve, reject) => {
            this.options.resolveSrv(hostname, (err, records) => {
                if (err) {
                    return reject(err);
                }
                const self = this, groupedRecords = (0, util_1.groupSrvRecords)(records), sortedKeys = Object.keys(groupedRecords).sort((a, b) => parseInt(a) - parseInt(b));
                function tryFirstOne(err) {
                    if (!sortedKeys.length) {
                        return reject(err);
                    }
                    const key = sortedKeys[0], group = groupedRecords[key], record = (0, util_1.weightSrvRecords)(group);
                    if (!group.records.length) {
                        sortedKeys.shift();
                    }
                    self.dnsLookup(record.name).then((host) => resolve({
                        host,
                        port: record.port,
                    }), tryFirstOne);
                }
                tryFirstOne();
            });
        });
    }
    dnsLookup(hostname) {
        return new Promise((resolve, reject) => {
            this.options.dnsLookup(hostname, (err, address) => {
                if (err) {
                    debug("failed to resolve hostname %s to IP: %s", hostname, err.message);
                    reject(err);
                }
                else {
                    debug("resolved hostname %s to IP %s", hostname, address);
                    resolve(address);
                }
            });
        });
    }
    /**
     * Normalize startup nodes, and resolving hostnames to IPs.
     *
     * This process happens every time when #connect() is called since
     * #startupNodes and DNS records may chanage.
     */
    async resolveStartupNodeHostnames() {
        if (!Array.isArray(this.startupNodes) || this.startupNodes.length === 0) {
            throw new Error("`startupNodes` should contain at least one node.");
        }
        const startupNodes = (0, util_1.normalizeNodeOptions)(this.startupNodes);
        const hostnames = (0, util_1.getUniqueHostnamesFromOptions)(startupNodes);
        if (hostnames.length === 0) {
            return startupNodes;
        }
        const configs = await Promise.all(hostnames.map((this.options.useSRVRecords ? this.resolveSrv : this.dnsLookup).bind(this)));
        const hostnameToConfig = (0, utils_1.zipMap)(hostnames, configs);
        return startupNodes.map((node) => {
            const config = hostnameToConfig.get(node.host);
            if (!config) {
                return node;
            }
            if (this.options.useSRVRecords) {
                return Object.assign({}, node, config);
            }
            return Object.assign({}, node, { host: config });
        });
    }
    createScanStream(command, { key, options = {} }) {
        return new ScanStream_1.default({
            objectMode: true,
            key: key,
            redis: this,
            command: command,
            ...options,
        });
    }
    createShardedSubscriberGroup() {
        this.subscriberGroupEmitter = new events_1.EventEmitter();
        this.shardedSubscribers = new ClusterSubscriberGroup_1.default(this.subscriberGroupEmitter, this.options);
        // Error handler used only for sharded-subscriber-triggered slots cache refreshes.
        // Normal (non-subscriber) connections are created with lazyConnect: true and can
        // become zombied. For sharded subscribers, a ClusterAllFailedError means
        // we have lost all nodes from the subscriber perspective and must tear down.
        const refreshSlotsCacheCallback = (err) => {
            // Disconnect only when refreshing the slots cache fails with ClusterAllFailedError
            if (err instanceof ClusterAllFailedError_1.default) {
                this.disconnect(true);
            }
        };
        this.subscriberGroupEmitter.on("-node", (redis, nodeKey) => {
            this.emit("-node", redis, nodeKey);
            this.refreshSlotsCache(refreshSlotsCacheCallback);
        });
        this.subscriberGroupEmitter.on("subscriberConnectFailed", ({ delay, error }) => {
            this.emit("error", error);
            setTimeout(() => {
                this.refreshSlotsCache(refreshSlotsCacheCallback);
            }, delay);
        });
        this.subscriberGroupEmitter.on("moved", () => {
            this.refreshSlotsCache(refreshSlotsCacheCallback);
        });
        this.subscriberGroupEmitter.on("-subscriber", () => {
            this.emit("-subscriber");
        });
        this.subscriberGroupEmitter.on("+subscriber", () => {
            this.emit("+subscriber");
        });
        this.subscriberGroupEmitter.on("nodeError", (error, nodeKey) => {
            this.emit("nodeError", error, nodeKey);
        });
        this.subscriberGroupEmitter.on("subscribersReady", () => {
            this.emit("subscribersReady");
        });
        for (const event of ["smessage", "smessageBuffer"]) {
            this.subscriberGroupEmitter.on(event, (arg1, arg2, arg3) => {
                this.emit(event, arg1, arg2, arg3);
            });
        }
    }
 }
 (0, applyMixin_1.default)(Cluster, events_1.EventEmitter);
 (0, transaction_1.addTransactionSupport)(Cluster.prototype);
 exports.default = Cluster;
--- a/backend/node_modules/ioredis/built/cluster/util.d.ts
+++ b/backend/node_modules/ioredis/built/cluster/util.d.ts
@@ -0,0 +1,25 @@
 /// <reference types="node" />
 import { SrvRecord } from "dns";
 export declare type NodeKey = string;
 export declare type NodeRole = "master" | "slave" | "all";
 export interface RedisOptions {
    port: number;
    host: string;
    username?: string | undefined;
    password?: string | undefined;
    [key: string]: any;
 }
 export interface SrvRecordsGroup {
    totalWeight: number;
    records: SrvRecord[];
 }
 export interface GroupedSrvRecords {
    [key: number]: SrvRecordsGroup;
 }
 export declare function getNodeKey(node: RedisOptions): NodeKey;
 export declare function nodeKeyToRedisOptions(nodeKey: NodeKey): RedisOptions;
 export declare function normalizeNodeOptions(nodes: Array<string | number | object>): RedisOptions[];
 export declare function getUniqueHostnamesFromOptions(nodes: RedisOptions[]): string[];
 export declare function groupSrvRecords(records: SrvRecord[]): GroupedSrvRecords;
 export declare function weightSrvRecords(recordsGroup: SrvRecordsGroup): SrvRecord;
 export declare function getConnectionName(component: any, nodeConnectionName: any): string;
--- a/backend/node_modules/ioredis/built/cluster/util.js
+++ b/backend/node_modules/ioredis/built/cluster/util.js
@@ -0,0 +1,100 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.getConnectionName = exports.weightSrvRecords = exports.groupSrvRecords = exports.getUniqueHostnamesFromOptions = exports.normalizeNodeOptions = exports.nodeKeyToRedisOptions = exports.getNodeKey = void 0;
 const utils_1 = require("../utils");
 const net_1 = require("net");
 function getNodeKey(node) {
    node.port = node.port || 6379;
    node.host = node.host || "127.0.0.1";
    return node.host + ":" + node.port;
 }
 exports.getNodeKey = getNodeKey;
 function nodeKeyToRedisOptions(nodeKey) {
    const portIndex = nodeKey.lastIndexOf(":");
    if (portIndex === -1) {
        throw new Error(`Invalid node key ${nodeKey}`);
    }
    return {
        host: nodeKey.slice(0, portIndex),
        port: Number(nodeKey.slice(portIndex + 1)),
    };
 }
 exports.nodeKeyToRedisOptions = nodeKeyToRedisOptions;
 function normalizeNodeOptions(nodes) {
    return nodes.map((node) => {
        const options = {};
        if (typeof node === "object") {
            Object.assign(options, node);
        }
        else if (typeof node === "string") {
            Object.assign(options, (0, utils_1.parseURL)(node));
        }
        else if (typeof node === "number") {
            options.port = node;
        }
        else {
            throw new Error("Invalid argument " + node);
        }
        if (typeof options.port === "string") {
            options.port = parseInt(options.port, 10);
        }
        // Cluster mode only support db 0
        delete options.db;
        if (!options.port) {
            options.port = 6379;
        }
        if (!options.host) {
            options.host = "127.0.0.1";
        }
        return (0, utils_1.resolveTLSProfile)(options);
    });
 }
 exports.normalizeNodeOptions = normalizeNodeOptions;
 function getUniqueHostnamesFromOptions(nodes) {
    const uniqueHostsMap = {};
    nodes.forEach((node) => {
        uniqueHostsMap[node.host] = true;
    });
    return Object.keys(uniqueHostsMap).filter((host) => !(0, net_1.isIP)(host));
 }
 exports.getUniqueHostnamesFromOptions = getUniqueHostnamesFromOptions;
 function groupSrvRecords(records) {
    const recordsByPriority = {};
    for (const record of records) {
        if (!recordsByPriority.hasOwnProperty(record.priority)) {
            recordsByPriority[record.priority] = {
                totalWeight: record.weight,
                records: [record],
            };
        }
        else {
            recordsByPriority[record.priority].totalWeight += record.weight;
            recordsByPriority[record.priority].records.push(record);
        }
    }
    return recordsByPriority;
 }
 exports.groupSrvRecords = groupSrvRecords;
 function weightSrvRecords(recordsGroup) {
    if (recordsGroup.records.length === 1) {
        recordsGroup.totalWeight = 0;
        return recordsGroup.records.shift();
    }
    // + `recordsGroup.records.length` to support `weight` 0
    const random = Math.floor(Math.random() * (recordsGroup.totalWeight + recordsGroup.records.length));
    let total = 0;
    for (const [i, record] of recordsGroup.records.entries()) {
        total += 1 + record.weight;
        if (total > random) {
            recordsGroup.totalWeight -= record.weight;
            recordsGroup.records.splice(i, 1);
            return record;
        }
    }
 }
 exports.weightSrvRecords = weightSrvRecords;
 function getConnectionName(component, nodeConnectionName) {
    const prefix = `ioredis-cluster(${component})`;
    return nodeConnectionName ? `${prefix}:${nodeConnectionName}` : prefix;
 }
 exports.getConnectionName = getConnectionName;
--- a/backend/node_modules/ioredis/built/connectors/AbstractConnector.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/AbstractConnector.d.ts
@@ -0,0 +1,12 @@
 import { NetStream } from "../types";
 export declare type ErrorEmitter = (type: string, err: Error) => void;
 export default abstract class AbstractConnector {
    firstError?: Error;
    protected connecting: boolean;
    protected stream: NetStream;
    private disconnectTimeout;
    constructor(disconnectTimeout: number);
    check(info: any): boolean;
    disconnect(): void;
    abstract connect(_: ErrorEmitter): Promise<NetStream>;
 }
--- a/backend/node_modules/ioredis/built/connectors/AbstractConnector.js
+++ b/backend/node_modules/ioredis/built/connectors/AbstractConnector.js
@@ -0,0 +1,26 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const utils_1 = require("../utils");
 const debug = (0, utils_1.Debug)("AbstractConnector");
 class AbstractConnector {
    constructor(disconnectTimeout) {
        this.connecting = false;
        this.disconnectTimeout = disconnectTimeout;
    }
    check(info) {
        return true;
    }
    disconnect() {
        this.connecting = false;
        if (this.stream) {
            const stream = this.stream; // Make sure callbacks refer to the same instance
            const timeout = setTimeout(() => {
                debug("stream %s:%s still open, destroying it", stream.remoteAddress, stream.remotePort);
                stream.destroy();
            }, this.disconnectTimeout);
            stream.on("close", () => clearTimeout(timeout));
            stream.end();
        }
    }
 }
 exports.default = AbstractConnector;
--- a/backend/node_modules/ioredis/built/connectors/ConnectorConstructor.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/ConnectorConstructor.d.ts
@@ -0,0 +1,5 @@
 import AbstractConnector from "./AbstractConnector";
 interface ConnectorConstructor {
    new (options: unknown): AbstractConnector;
 }
 export default ConnectorConstructor;
--- a/backend/node_modules/ioredis/built/connectors/ConnectorConstructor.js
+++ b/backend/node_modules/ioredis/built/connectors/ConnectorConstructor.js
@@ -0,0 +1,2 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/FailoverDetector.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/FailoverDetector.d.ts
@@ -0,0 +1,11 @@
 import SentinelConnector from "./index";
 import { Sentinel } from "./types";
 export declare class FailoverDetector {
    private connector;
    private sentinels;
    private isDisconnected;
    constructor(connector: SentinelConnector, sentinels: Sentinel[]);
    cleanup(): void;
    subscribe(): Promise<void>;
    private disconnect;
 }
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/FailoverDetector.js
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/FailoverDetector.js
@@ -0,0 +1,45 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.FailoverDetector = void 0;
 const utils_1 = require("../../utils");
 const debug = (0, utils_1.Debug)("FailoverDetector");
 const CHANNEL_NAME = "+switch-master";
 class FailoverDetector {
    // sentinels can't be used for regular commands after this
    constructor(connector, sentinels) {
        this.isDisconnected = false;
        this.connector = connector;
        this.sentinels = sentinels;
    }
    cleanup() {
        this.isDisconnected = true;
        for (const sentinel of this.sentinels) {
            sentinel.client.disconnect();
        }
    }
    async subscribe() {
        debug("Starting FailoverDetector");
        const promises = [];
        for (const sentinel of this.sentinels) {
            const promise = sentinel.client.subscribe(CHANNEL_NAME).catch((err) => {
                debug("Failed to subscribe to failover messages on sentinel %s:%s (%s)", sentinel.address.host || "127.0.0.1", sentinel.address.port || 26739, err.message);
            });
            promises.push(promise);
            sentinel.client.on("message", (channel) => {
                if (!this.isDisconnected && channel === CHANNEL_NAME) {
                    this.disconnect();
                }
            });
        }
        await Promise.all(promises);
    }
    disconnect() {
        // Avoid disconnecting more than once per failover.
        // A new FailoverDetector will be created after reconnecting.
        this.isDisconnected = true;
        debug("Failover detected, disconnecting");
        // Will call this.cleanup()
        this.connector.disconnect();
    }
 }
 exports.FailoverDetector = FailoverDetector;
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/SentinelIterator.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/SentinelIterator.d.ts
@@ -0,0 +1,13 @@
 import { SentinelAddress } from "./types";
 export default class SentinelIterator implements Iterator<Partial<SentinelAddress>> {
    private cursor;
    private sentinels;
    constructor(sentinels: Array<Partial<SentinelAddress>>);
    next(): {
        done: boolean;
        value: Partial<SentinelAddress>;
    };
    reset(moveCurrentEndpointToFirst: boolean): void;
    add(sentinel: SentinelAddress): boolean;
    toString(): string;
 }
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/SentinelIterator.js
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/SentinelIterator.js
@@ -0,0 +1,37 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 function isSentinelEql(a, b) {
    return ((a.host || "127.0.0.1") === (b.host || "127.0.0.1") &&
        (a.port || 26379) === (b.port || 26379));
 }
 class SentinelIterator {
    constructor(sentinels) {
        this.cursor = 0;
        this.sentinels = sentinels.slice(0);
    }
    next() {
        const done = this.cursor >= this.sentinels.length;
        return { done, value: done ? undefined : this.sentinels[this.cursor++] };
    }
    reset(moveCurrentEndpointToFirst) {
        if (moveCurrentEndpointToFirst &&
            this.sentinels.length > 1 &&
            this.cursor !== 1) {
            this.sentinels.unshift(...this.sentinels.splice(this.cursor - 1));
        }
        this.cursor = 0;
    }
    add(sentinel) {
        for (let i = 0; i < this.sentinels.length; i++) {
            if (isSentinelEql(sentinel, this.sentinels[i])) {
                return false;
            }
        }
        this.sentinels.push(sentinel);
        return true;
    }
    toString() {
        return `${JSON.stringify(this.sentinels)} @${this.cursor}`;
    }
 }
 exports.default = SentinelIterator;
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/index.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/index.d.ts
@@ -0,0 +1,72 @@
 /// <reference types="node" />
 import { EventEmitter } from "events";
 import { NatMap } from "../../cluster/ClusterOptions";
 import { ConnectionOptions } from "tls";
 import SentinelIterator from "./SentinelIterator";
 import { SentinelAddress } from "./types";
 import AbstractConnector, { ErrorEmitter } from "../AbstractConnector";
 import { NetStream } from "../../types";
 interface AddressFromResponse {
    port: string;
    ip: string;
    flags?: string | undefined;
 }
 declare type PreferredSlaves = ((slaves: AddressFromResponse[]) => AddressFromResponse | null) | Array<{
    port: string;
    ip: string;
    prio?: number | undefined;
 }> | {
    port: string;
    ip: string;
    prio?: number | undefined;
 };
 export { SentinelAddress, SentinelIterator };
 export interface SentinelConnectionOptions {
    /**
     * Master group name of the Sentinel
     */
    name?: string | undefined;
    /**
     * @default "master"
     */
    role?: "master" | "slave" | undefined;
    tls?: ConnectionOptions | undefined;
    sentinelUsername?: string | undefined;
    sentinelPassword?: string | undefined;
    sentinels?: Array<Partial<SentinelAddress>> | undefined;
    sentinelRetryStrategy?: ((retryAttempts: number) => number | void | null) | undefined;
    sentinelReconnectStrategy?: ((retryAttempts: number) => number | void | null) | undefined;
    preferredSlaves?: PreferredSlaves | undefined;
    connectTimeout?: number | undefined;
    disconnectTimeout?: number | undefined;
    sentinelCommandTimeout?: number | undefined;
    enableTLSForSentinelMode?: boolean | undefined;
    sentinelTLS?: ConnectionOptions | undefined;
    natMap?: NatMap | undefined;
    updateSentinels?: boolean | undefined;
    /**
     * @default 10
     */
    sentinelMaxConnections?: number | undefined;
    failoverDetector?: boolean | undefined;
 }
 export default class SentinelConnector extends AbstractConnector {
    protected options: SentinelConnectionOptions;
    emitter: EventEmitter | null;
    protected sentinelIterator: SentinelIterator;
    private retryAttempts;
    private failoverDetector;
    constructor(options: SentinelConnectionOptions);
    check(info: {
        role?: string;
    }): boolean;
    disconnect(): void;
    connect(eventEmitter: ErrorEmitter): Promise<NetStream>;
    private updateSentinels;
    private resolveMaster;
    private resolveSlave;
    private sentinelNatResolve;
    private connectToSentinel;
    private resolve;
    private initFailoverDetector;
 }
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/index.js
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/index.js
@@ -0,0 +1,305 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.SentinelIterator = void 0;
 const net_1 = require("net");
 const utils_1 = require("../../utils");
 const tls_1 = require("tls");
 const SentinelIterator_1 = require("./SentinelIterator");
 exports.SentinelIterator = SentinelIterator_1.default;
 const AbstractConnector_1 = require("../AbstractConnector");
 const Redis_1 = require("../../Redis");
 const FailoverDetector_1 = require("./FailoverDetector");
 const debug = (0, utils_1.Debug)("SentinelConnector");
 class SentinelConnector extends AbstractConnector_1.default {
    constructor(options) {
        super(options.disconnectTimeout);
        this.options = options;
        this.emitter = null;
        this.failoverDetector = null;
        if (!this.options.sentinels.length) {
            throw new Error("Requires at least one sentinel to connect to.");
        }
        if (!this.options.name) {
            throw new Error("Requires the name of master.");
        }
        this.sentinelIterator = new SentinelIterator_1.default(this.options.sentinels);
    }
    check(info) {
        const roleMatches = !info.role || this.options.role === info.role;
        if (!roleMatches) {
            debug("role invalid, expected %s, but got %s", this.options.role, info.role);
            // Start from the next item.
            // Note that `reset` will move the cursor to the previous element,
            // so we advance two steps here.
            this.sentinelIterator.next();
            this.sentinelIterator.next();
            this.sentinelIterator.reset(true);
        }
        return roleMatches;
    }
    disconnect() {
        super.disconnect();
        if (this.failoverDetector) {
            this.failoverDetector.cleanup();
        }
    }
    connect(eventEmitter) {
        this.connecting = true;
        this.retryAttempts = 0;
        let lastError;
        const connectToNext = async () => {
            const endpoint = this.sentinelIterator.next();
            if (endpoint.done) {
                this.sentinelIterator.reset(false);
                const retryDelay = typeof this.options.sentinelRetryStrategy === "function"
                    ? this.options.sentinelRetryStrategy(++this.retryAttempts)
                    : null;
                let errorMsg = typeof retryDelay !== "number"
                    ? "All sentinels are unreachable and retry is disabled."
                    : `All sentinels are unreachable. Retrying from scratch after ${retryDelay}ms.`;
                if (lastError) {
                    errorMsg += ` Last error: ${lastError.message}`;
                }
                debug(errorMsg);
                const error = new Error(errorMsg);
                if (typeof retryDelay === "number") {
                    eventEmitter("error", error);
                    await new Promise((resolve) => setTimeout(resolve, retryDelay));
                    return connectToNext();
                }
                else {
                    throw error;
                }
            }
            let resolved = null;
            let err = null;
            try {
                resolved = await this.resolve(endpoint.value);
            }
            catch (error) {
                err = error;
            }
            if (!this.connecting) {
                throw new Error(utils_1.CONNECTION_CLOSED_ERROR_MSG);
            }
            const endpointAddress = endpoint.value.host + ":" + endpoint.value.port;
            if (resolved) {
                debug("resolved: %s:%s from sentinel %s", resolved.host, resolved.port, endpointAddress);
                if (this.options.enableTLSForSentinelMode && this.options.tls) {
                    Object.assign(resolved, this.options.tls);
                    this.stream = (0, tls_1.connect)(resolved);
                    this.stream.once("secureConnect", this.initFailoverDetector.bind(this));
                }
                else {
                    this.stream = (0, net_1.createConnection)(resolved);
                    this.stream.once("connect", this.initFailoverDetector.bind(this));
                }
                this.stream.once("error", (err) => {
                    this.firstError = err;
                });
                return this.stream;
            }
            else {
                const errorMsg = err
                    ? "failed to connect to sentinel " +
                        endpointAddress +
                        " because " +
                        err.message
                    : "connected to sentinel " +
                        endpointAddress +
                        " successfully, but got an invalid reply: " +
                        resolved;
                debug(errorMsg);
                eventEmitter("sentinelError", new Error(errorMsg));
                if (err) {
                    lastError = err;
                }
                return connectToNext();
            }
        };
        return connectToNext();
    }
    async updateSentinels(client) {
        if (!this.options.updateSentinels) {
            return;
        }
        const result = await client.sentinel("sentinels", this.options.name);
        if (!Array.isArray(result)) {
            return;
        }
        result
            .map(utils_1.packObject)
            .forEach((sentinel) => {
            const flags = sentinel.flags ? sentinel.flags.split(",") : [];
            if (flags.indexOf("disconnected") === -1 &&
                sentinel.ip &&
                sentinel.port) {
                const endpoint = this.sentinelNatResolve(addressResponseToAddress(sentinel));
                if (this.sentinelIterator.add(endpoint)) {
                    debug("adding sentinel %s:%s", endpoint.host, endpoint.port);
                }
            }
        });
        debug("Updated internal sentinels: %s", this.sentinelIterator);
    }
    async resolveMaster(client) {
        const result = await client.sentinel("get-master-addr-by-name", this.options.name);
        await this.updateSentinels(client);
        return this.sentinelNatResolve(Array.isArray(result)
            ? { host: result[0], port: Number(result[1]) }
            : null);
    }
    async resolveSlave(client) {
        const result = await client.sentinel("slaves", this.options.name);
        if (!Array.isArray(result)) {
            return null;
        }
        const availableSlaves = result
            .map(utils_1.packObject)
            .filter((slave) => slave.flags && !slave.flags.match(/(disconnected|s_down|o_down)/));
        return this.sentinelNatResolve(selectPreferredSentinel(availableSlaves, this.options.preferredSlaves));
    }
    sentinelNatResolve(item) {
        if (!item || !this.options.natMap)
            return item;
        const key = `${item.host}:${item.port}`;
        let result = item;
        if (typeof this.options.natMap === "function") {
            result = this.options.natMap(key) || item;
        }
        else if (typeof this.options.natMap === "object") {
            result = this.options.natMap[key] || item;
        }
        return result;
    }
    connectToSentinel(endpoint, options) {
        const redis = new Redis_1.default({
            port: endpoint.port || 26379,
            host: endpoint.host,
            username: this.options.sentinelUsername || null,
            password: this.options.sentinelPassword || null,
            family: endpoint.family ||
                // @ts-expect-error
                ("path" in this.options && this.options.path
                    ? undefined
                    : // @ts-expect-error
                        this.options.family),
            tls: this.options.sentinelTLS,
            retryStrategy: null,
            enableReadyCheck: false,
            connectTimeout: this.options.connectTimeout,
            commandTimeout: this.options.sentinelCommandTimeout,
            ...options,
        });
        // @ts-expect-error
        return redis;
    }
    async resolve(endpoint) {
        const client = this.connectToSentinel(endpoint);
        // ignore the errors since resolve* methods will handle them
        client.on("error", noop);
        try {
            if (this.options.role === "slave") {
                return await this.resolveSlave(client);
            }
            else {
                return await this.resolveMaster(client);
            }
        }
        finally {
            client.disconnect();
        }
    }
    async initFailoverDetector() {
        var _a;
        if (!this.options.failoverDetector) {
            return;
        }
        // Move the current sentinel to the first position
        this.sentinelIterator.reset(true);
        const sentinels = [];
        // In case of a large amount of sentinels, limit the number of concurrent connections
        while (sentinels.length < this.options.sentinelMaxConnections) {
            const { done, value } = this.sentinelIterator.next();
            if (done) {
                break;
            }
            const client = this.connectToSentinel(value, {
                lazyConnect: true,
                retryStrategy: this.options.sentinelReconnectStrategy,
            });
            client.on("reconnecting", () => {
                var _a;
                // Tests listen to this event
                (_a = this.emitter) === null || _a === void 0 ? void 0 : _a.emit("sentinelReconnecting");
            });
            sentinels.push({ address: value, client });
        }
        this.sentinelIterator.reset(false);
        if (this.failoverDetector) {
            // Clean up previous detector
            this.failoverDetector.cleanup();
        }
        this.failoverDetector = new FailoverDetector_1.FailoverDetector(this, sentinels);
        await this.failoverDetector.subscribe();
        // Tests listen to this event
        (_a = this.emitter) === null || _a === void 0 ? void 0 : _a.emit("failoverSubscribed");
    }
 }
 exports.default = SentinelConnector;
 function selectPreferredSentinel(availableSlaves, preferredSlaves) {
    if (availableSlaves.length === 0) {
        return null;
    }
    let selectedSlave;
    if (typeof preferredSlaves === "function") {
        selectedSlave = preferredSlaves(availableSlaves);
    }
    else if (preferredSlaves !== null && typeof preferredSlaves === "object") {
        const preferredSlavesArray = Array.isArray(preferredSlaves)
            ? preferredSlaves
            : [preferredSlaves];
        // sort by priority
        preferredSlavesArray.sort((a, b) => {
            // default the priority to 1
            if (!a.prio) {
                a.prio = 1;
            }
            if (!b.prio) {
                b.prio = 1;
            }
            // lowest priority first
            if (a.prio < b.prio) {
                return -1;
            }
            if (a.prio > b.prio) {
                return 1;
            }
            return 0;
        });
        // loop over preferred slaves and return the first match
        for (let p = 0; p < preferredSlavesArray.length; p++) {
            for (let a = 0; a < availableSlaves.length; a++) {
                const slave = availableSlaves[a];
                if (slave.ip === preferredSlavesArray[p].ip) {
                    if (slave.port === preferredSlavesArray[p].port) {
                        selectedSlave = slave;
                        break;
                    }
                }
            }
            if (selectedSlave) {
                break;
            }
        }
    }
    // if none of the preferred slaves are available, a random available slave is returned
    if (!selectedSlave) {
        selectedSlave = (0, utils_1.sample)(availableSlaves);
    }
    return addressResponseToAddress(selectedSlave);
 }
 function addressResponseToAddress(input) {
    return { host: input.ip, port: Number(input.port) };
 }
 function noop() { }
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/types.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/types.d.ts
@@ -0,0 +1,21 @@
 import { RedisOptions } from "../../redis/RedisOptions";
 export interface SentinelAddress {
    port: number;
    host: string;
    family?: number;
 }
 export interface RedisClient {
    options: RedisOptions;
    sentinel(subcommand: "sentinels", name: string): Promise<string[]>;
    sentinel(subcommand: "get-master-addr-by-name", name: string): Promise<string[]>;
    sentinel(subcommand: "slaves", name: string): Promise<string[]>;
    subscribe(...channelNames: string[]): Promise<number>;
    on(event: "message", callback: (channel: string, message: string) => void): void;
    on(event: "error", callback: (error: Error) => void): void;
    on(event: "reconnecting", callback: () => void): void;
    disconnect(): void;
 }
 export interface Sentinel {
    address: Partial<SentinelAddress>;
    client: RedisClient;
 }
--- a/backend/node_modules/ioredis/built/connectors/SentinelConnector/types.js
+++ b/backend/node_modules/ioredis/built/connectors/SentinelConnector/types.js
@@ -0,0 +1,2 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
--- a/backend/node_modules/ioredis/built/connectors/StandaloneConnector.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/StandaloneConnector.d.ts
@@ -0,0 +1,17 @@
 /// <reference types="node" />
 import { IpcNetConnectOpts, TcpNetConnectOpts } from "net";
 import { ConnectionOptions } from "tls";
 import { NetStream } from "../types";
 import AbstractConnector, { ErrorEmitter } from "./AbstractConnector";
 declare type TcpOptions = Pick<TcpNetConnectOpts, "port" | "host" | "family">;
 declare type IpcOptions = Pick<IpcNetConnectOpts, "path">;
 export declare type StandaloneConnectionOptions = Partial<TcpOptions & IpcOptions> & {
    disconnectTimeout?: number | undefined;
    tls?: ConnectionOptions | undefined;
 };
 export default class StandaloneConnector extends AbstractConnector {
    protected options: StandaloneConnectionOptions;
    constructor(options: StandaloneConnectionOptions);
    connect(_: ErrorEmitter): Promise<NetStream>;
 }
 export {};
--- a/backend/node_modules/ioredis/built/connectors/StandaloneConnector.js
+++ b/backend/node_modules/ioredis/built/connectors/StandaloneConnector.js
@@ -0,0 +1,69 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const net_1 = require("net");
 const tls_1 = require("tls");
 const utils_1 = require("../utils");
 const AbstractConnector_1 = require("./AbstractConnector");
 class StandaloneConnector extends AbstractConnector_1.default {
    constructor(options) {
        super(options.disconnectTimeout);
        this.options = options;
    }
    connect(_) {
        const { options } = this;
        this.connecting = true;
        let connectionOptions;
        if ("path" in options && options.path) {
            connectionOptions = {
                path: options.path,
            };
        }
        else {
            connectionOptions = {};
            if ("port" in options && options.port != null) {
                connectionOptions.port = options.port;
            }
            if ("host" in options && options.host != null) {
                connectionOptions.host = options.host;
            }
            if ("family" in options && options.family != null) {
                connectionOptions.family = options.family;
            }
        }
        if (options.tls) {
            Object.assign(connectionOptions, options.tls);
        }
        // TODO:
        // We use native Promise here since other Promise
        // implementation may use different schedulers that
        // cause issue when the stream is resolved in the
        // next tick.
        // Should use the provided promise in the next major
        // version and do not connect before resolved.
        return new Promise((resolve, reject) => {
            process.nextTick(() => {
                if (!this.connecting) {
                    reject(new Error(utils_1.CONNECTION_CLOSED_ERROR_MSG));
                    return;
                }
                try {
                    if (options.tls) {
                        this.stream = (0, tls_1.connect)(connectionOptions);
                    }
                    else {
                        this.stream = (0, net_1.createConnection)(connectionOptions);
                    }
                }
                catch (err) {
                    reject(err);
                    return;
                }
                this.stream.once("error", (err) => {
                    this.firstError = err;
                });
                resolve(this.stream);
            });
        });
    }
 }
 exports.default = StandaloneConnector;
--- a/backend/node_modules/ioredis/built/connectors/index.d.ts
+++ b/backend/node_modules/ioredis/built/connectors/index.d.ts
@@ -0,0 +1,3 @@
 import StandaloneConnector from "./StandaloneConnector";
 import SentinelConnector from "./SentinelConnector";
 export { StandaloneConnector, SentinelConnector };
--- a/backend/node_modules/ioredis/built/connectors/index.js
+++ b/backend/node_modules/ioredis/built/connectors/index.js
@@ -0,0 +1,7 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.SentinelConnector = exports.StandaloneConnector = void 0;
 const StandaloneConnector_1 = require("./StandaloneConnector");
 exports.StandaloneConnector = StandaloneConnector_1.default;
 const SentinelConnector_1 = require("./SentinelConnector");
 exports.SentinelConnector = SentinelConnector_1.default;
--- a/backend/node_modules/ioredis/built/constants/TLSProfiles.d.ts
+++ b/backend/node_modules/ioredis/built/constants/TLSProfiles.d.ts
--- a/backend/node_modules/ioredis/built/constants/TLSProfiles.js
+++ b/backend/node_modules/ioredis/built/constants/TLSProfiles.js
@@ -0,0 +1,149 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 /**
 * TLS settings for Redis Cloud. Updated on 2022-08-19.
 */
 const RedisCloudCA = `-----BEGIN CERTIFICATE-----
 MIIDTzCCAjegAwIBAgIJAKSVpiDswLcwMA0GCSqGSIb3DQEBBQUAMD4xFjAUBgNV
 BAoMDUdhcmFudGlhIERhdGExJDAiBgNVBAMMG1NTTCBDZXJ0aWZpY2F0aW9uIEF1
 dGhvcml0eTAeFw0xMzEwMDExMjE0NTVaFw0yMzA5MjkxMjE0NTVaMD4xFjAUBgNV
 BAoMDUdhcmFudGlhIERhdGExJDAiBgNVBAMMG1NTTCBDZXJ0aWZpY2F0aW9uIEF1
 dGhvcml0eTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALZqkh/DczWP
 JnxnHLQ7QL0T4B4CDKWBKCcisriGbA6ZePWVNo4hfKQC6JrzfR+081NeD6VcWUiz
 rmd+jtPhIY4c+WVQYm5PKaN6DT1imYdxQw7aqO5j2KUCEh/cznpLxeSHoTxlR34E
 QwF28Wl3eg2vc5ct8LjU3eozWVk3gb7alx9mSA2SgmuX5lEQawl++rSjsBStemY2
 BDwOpAMXIrdEyP/cVn8mkvi/BDs5M5G+09j0gfhyCzRWMQ7Hn71u1eolRxwVxgi3
 TMn+/vTaFSqxKjgck6zuAYjBRPaHe7qLxHNr1So/Mc9nPy+3wHebFwbIcnUojwbp
 4nctkWbjb2cCAwEAAaNQME4wHQYDVR0OBBYEFP1whtcrydmW3ZJeuSoKZIKjze3w
 MB8GA1UdIwQYMBaAFP1whtcrydmW3ZJeuSoKZIKjze3wMAwGA1UdEwQFMAMBAf8w
 DQYJKoZIhvcNAQEFBQADggEBAG2erXhwRAa7+ZOBs0B6X57Hwyd1R4kfmXcs0rta
 lbPpvgULSiB+TCbf3EbhJnHGyvdCY1tvlffLjdA7HJ0PCOn+YYLBA0pTU/dyvrN6
 Su8NuS5yubnt9mb13nDGYo1rnt0YRfxN+8DM3fXIVr038A30UlPX2Ou1ExFJT0MZ
 uFKY6ZvLdI6/1cbgmguMlAhM+DhKyV6Sr5699LM3zqeI816pZmlREETYkGr91q7k
 BpXJu/dtHaGxg1ZGu6w/PCsYGUcECWENYD4VQPd8N32JjOfu6vEgoEAwfPP+3oGp
 Z4m3ewACcWOAenqflb+cQYC4PsF7qbXDmRaWrbKntOlZ3n0=
 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
 MIIGMTCCBBmgAwIBAgICEAAwDQYJKoZIhvcNAQELBQAwajELMAkGA1UEBhMCVVMx
 CzAJBgNVBAgMAkNBMQswCQYDVQQHDAJDQTESMBAGA1UECgwJUmVkaXNMYWJzMS0w
 KwYDVQQDDCRSZWRpc0xhYnMgUm9vdCBDZXJ0aWZpY2F0ZSBBdXRob3JpdHkwHhcN
 MTgwMjI1MTUzNzM3WhcNMjgwMjIzMTUzNzM3WjBfMQswCQYDVQQGEwJVUzELMAkG
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 -----END CERTIFICATE-----
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 -----END CERTIFICATE-----
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 const TLSProfiles = {
    RedisCloudFixed: { ca: RedisCloudCA },
    RedisCloudFlexible: { ca: RedisCloudCA },
 };
 exports.default = TLSProfiles;
--- a/backend/node_modules/ioredis/built/errors/ClusterAllFailedError.d.ts
+++ b/backend/node_modules/ioredis/built/errors/ClusterAllFailedError.d.ts
@@ -0,0 +1,7 @@
 import { RedisError } from "redis-errors";
 export default class ClusterAllFailedError extends RedisError {
    lastNodeError: RedisError;
    static defaultMessage: string;
    constructor(message: any, lastNodeError: RedisError);
    get name(): string;
 }
--- a/backend/node_modules/ioredis/built/errors/ClusterAllFailedError.js
+++ b/backend/node_modules/ioredis/built/errors/ClusterAllFailedError.js
@@ -0,0 +1,15 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const redis_errors_1 = require("redis-errors");
 class ClusterAllFailedError extends redis_errors_1.RedisError {
    constructor(message, lastNodeError) {
        super(message);
        this.lastNodeError = lastNodeError;
        Error.captureStackTrace(this, this.constructor);
    }
    get name() {
        return this.constructor.name;
    }
 }
 exports.default = ClusterAllFailedError;
 ClusterAllFailedError.defaultMessage = "Failed to refresh slots cache.";
--- a/backend/node_modules/ioredis/built/errors/MaxRetriesPerRequestError.d.ts
+++ b/backend/node_modules/ioredis/built/errors/MaxRetriesPerRequestError.d.ts
@@ -0,0 +1,5 @@
 import { AbortError } from "redis-errors";
 export default class MaxRetriesPerRequestError extends AbortError {
    constructor(maxRetriesPerRequest: number);
    get name(): string;
 }
--- a/backend/node_modules/ioredis/built/errors/MaxRetriesPerRequestError.js
+++ b/backend/node_modules/ioredis/built/errors/MaxRetriesPerRequestError.js
@@ -0,0 +1,14 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const redis_errors_1 = require("redis-errors");
 class MaxRetriesPerRequestError extends redis_errors_1.AbortError {
    constructor(maxRetriesPerRequest) {
        const message = `Reached the max retries per request limit (which is ${maxRetriesPerRequest}). Refer to "maxRetriesPerRequest" option for details.`;
        super(message);
        Error.captureStackTrace(this, this.constructor);
    }
    get name() {
        return this.constructor.name;
    }
 }
 exports.default = MaxRetriesPerRequestError;
--- a/backend/node_modules/ioredis/built/errors/index.d.ts
+++ b/backend/node_modules/ioredis/built/errors/index.d.ts
@@ -0,0 +1,2 @@
 import MaxRetriesPerRequestError from "./MaxRetriesPerRequestError";
 export { MaxRetriesPerRequestError };
--- a/backend/node_modules/ioredis/built/errors/index.js
+++ b/backend/node_modules/ioredis/built/errors/index.js
@@ -0,0 +1,5 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.MaxRetriesPerRequestError = void 0;
 const MaxRetriesPerRequestError_1 = require("./MaxRetriesPerRequestError");
 exports.MaxRetriesPerRequestError = MaxRetriesPerRequestError_1.default;
--- a/backend/node_modules/ioredis/built/index.d.ts
+++ b/backend/node_modules/ioredis/built/index.d.ts
@@ -0,0 +1,43 @@
 export { default } from "./Redis";
 export { default as Redis } from "./Redis";
 export { default as Cluster } from "./cluster";
 /**
 * @ignore
 */
 export { default as Command } from "./Command";
 /**
 * @ignore
 */
 export { default as RedisCommander, Result, ClientContext, } from "./utils/RedisCommander";
 /**
 * @ignore
 */
 export { default as ScanStream } from "./ScanStream";
 /**
 * @ignore
 */
 export { default as Pipeline } from "./Pipeline";
 /**
 * @ignore
 */
 export { default as AbstractConnector } from "./connectors/AbstractConnector";
 /**
 * @ignore
 */
 export { default as SentinelConnector, SentinelIterator, } from "./connectors/SentinelConnector";
 /**
 * @ignore
 */
 export { Callback } from "./types";
 export { SentinelAddress, SentinelConnectionOptions, } from "./connectors/SentinelConnector";
 export { StandaloneConnectionOptions } from "./connectors/StandaloneConnector";
 export { RedisOptions, CommonRedisOptions } from "./redis/RedisOptions";
 export { ClusterNode } from "./cluster";
 export { ClusterOptions, DNSLookupFunction, DNSResolveSrvFunction, NatMap, } from "./cluster/ClusterOptions";
 export { NodeRole } from "./cluster/util";
 export type { RedisKey, RedisValue, ChainableCommander, } from "./utils/RedisCommander";
 export declare const ReplyError: any;
 /**
 * @ignore
 */
 export declare function print(err: Error | null, reply?: any): void;
--- a/backend/node_modules/ioredis/built/index.js
+++ b/backend/node_modules/ioredis/built/index.js
@@ -0,0 +1,62 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.print = exports.ReplyError = exports.SentinelIterator = exports.SentinelConnector = exports.AbstractConnector = exports.Pipeline = exports.ScanStream = exports.Command = exports.Cluster = exports.Redis = exports.default = void 0;
 exports = module.exports = require("./Redis").default;
 var Redis_1 = require("./Redis");
 Object.defineProperty(exports, "default", { enumerable: true, get: function () { return Redis_1.default; } });
 var Redis_2 = require("./Redis");
 Object.defineProperty(exports, "Redis", { enumerable: true, get: function () { return Redis_2.default; } });
 var cluster_1 = require("./cluster");
 Object.defineProperty(exports, "Cluster", { enumerable: true, get: function () { return cluster_1.default; } });
 /**
 * @ignore
 */
 var Command_1 = require("./Command");
 Object.defineProperty(exports, "Command", { enumerable: true, get: function () { return Command_1.default; } });
 /**
 * @ignore
 */
 var ScanStream_1 = require("./ScanStream");
 Object.defineProperty(exports, "ScanStream", { enumerable: true, get: function () { return ScanStream_1.default; } });
 /**
 * @ignore
 */
 var Pipeline_1 = require("./Pipeline");
 Object.defineProperty(exports, "Pipeline", { enumerable: true, get: function () { return Pipeline_1.default; } });
 /**
 * @ignore
 */
 var AbstractConnector_1 = require("./connectors/AbstractConnector");
 Object.defineProperty(exports, "AbstractConnector", { enumerable: true, get: function () { return AbstractConnector_1.default; } });
 /**
 * @ignore
 */
 var SentinelConnector_1 = require("./connectors/SentinelConnector");
 Object.defineProperty(exports, "SentinelConnector", { enumerable: true, get: function () { return SentinelConnector_1.default; } });
 Object.defineProperty(exports, "SentinelIterator", { enumerable: true, get: function () { return SentinelConnector_1.SentinelIterator; } });
 // No TS typings
 exports.ReplyError = require("redis-errors").ReplyError;
 /**
 * @ignore
 */
 Object.defineProperty(exports, "Promise", {
    get() {
        console.warn("ioredis v5 does not support plugging third-party Promise library anymore. Native Promise will be used.");
        return Promise;
    },
    set(_lib) {
        console.warn("ioredis v5 does not support plugging third-party Promise library anymore. Native Promise will be used.");
    },
 });
 /**
 * @ignore
 */
 function print(err, reply) {
    if (err) {
        console.log("Error: " + err);
    }
    else {
        console.log("Reply: " + reply);
    }
 }
 exports.print = print;
--- a/backend/node_modules/ioredis/built/redis/RedisOptions.d.ts
+++ b/backend/node_modules/ioredis/built/redis/RedisOptions.d.ts
@@ -0,0 +1,197 @@
 import { CommanderOptions } from "../utils/Commander";
 import ConnectorConstructor from "../connectors/ConnectorConstructor";
 import { SentinelConnectionOptions } from "../connectors/SentinelConnector";
 import { StandaloneConnectionOptions } from "../connectors/StandaloneConnector";
 export declare type ReconnectOnError = (err: Error) => boolean | 1 | 2;
 export interface CommonRedisOptions extends CommanderOptions {
    Connector?: ConnectorConstructor | undefined;
    retryStrategy?: ((times: number) => number | void | null) | undefined;
    /**
     * If a command does not return a reply within a set number of milliseconds,
     * a "Command timed out" error will be thrown.
     */
    commandTimeout?: number | undefined;
    /**
     * Enables client-side timeout protection for blocking commands when set
     * to a positive number. If `blockingTimeout` is undefined, `0`, or
     * negative (e.g. `-1`), the protection is disabled and no client-side
     * timers are installed for blocking commands.
     */
    blockingTimeout?: number | undefined;
    /**
     * Grace period (ms) added to blocking command timeouts. Only used when
     * `blockingTimeout` is a positive number. Defaults to 100ms.
     */
    blockingTimeoutGrace?: number | undefined;
    /**
     * If the socket does not receive data within a set number of milliseconds:
     * 1. the socket is considered "dead" and will be destroyed
     * 2. the client will reject any running commands (altought they might have been processed by the server)
     * 3. the reconnect strategy will kick in (depending on the configuration)
     */
    socketTimeout?: number | undefined;
    /**
     * Enable/disable keep-alive functionality.
     * @link https://nodejs.org/api/net.html#socketsetkeepaliveenable-initialdelay
     * @default 0
     */
    keepAlive?: number | undefined;
    /**
     * Enable/disable the use of Nagle's algorithm.
     * @link https://nodejs.org/api/net.html#socketsetnodelaynodelay
     * @default true
     */
    noDelay?: boolean | undefined;
    /**
     * Set the name of the connection to make it easier to identity the connection
     * in client list.
     * @link https://redis.io/commands/client-setname
     */
    connectionName?: string | undefined;
    /**
     * If true, skips setting library info via CLIENT SETINFO.
     * @link https://redis.io/docs/latest/commands/client-setinfo/
     * @default false
     */
    disableClientInfo?: boolean | undefined;
    /**
     * Tag to append to the library name in CLIENT SETINFO (ioredis(tag)).
     * @link https://redis.io/docs/latest/commands/client-setinfo/
     * @default undefined
     */
    clientInfoTag?: string | undefined;
    /**
     * If set, client will send AUTH command with the value of this option as the first argument when connected.
     * This is supported since Redis 6.
     */
    username?: string | undefined;
    /**
     * If set, client will send AUTH command with the value of this option when connected.
     */
    password?: string | undefined;
    /**
     * Database index to use.
     *
     * @default 0
     */
    db?: number | undefined;
    /**
     * When the client reconnects, channels subscribed in the previous connection will be
     * resubscribed automatically if `autoResubscribe` is `true`.
     * @default true
     */
    autoResubscribe?: boolean | undefined;
    /**
     * Whether or not to resend unfulfilled commands on reconnect.
     * Unfulfilled commands are most likely to be blocking commands such as `brpop` or `blpop`.
     * @default true
     */
    autoResendUnfulfilledCommands?: boolean | undefined;
    /**
     * Whether or not to reconnect on certain Redis errors.
     * This options by default is `null`, which means it should never reconnect on Redis errors.
     * You can pass a function that accepts an Redis error, and returns:
     * - `true` or `1` to trigger a reconnection.
     * - `false` or `0` to not reconnect.
     * - `2` to reconnect and resend the failed command (who triggered the error) after reconnection.
     * @example
     * ```js
     * const redis = new Redis({
     *   reconnectOnError(err) {
     *     const targetError = "READONLY";
     *     if (err.message.includes(targetError)) {
     *       // Only reconnect when the error contains "READONLY"
     *       return true; // or `return 1;`
     *     }
     *   },
     * });
     * ```
     * @default null
     */
    reconnectOnError?: ReconnectOnError | null | undefined;
    /**
     * @default false
     */
    readOnly?: boolean | undefined;
    /**
     * When enabled, numbers returned by Redis will be converted to JavaScript strings instead of numbers.
     * This is necessary if you want to handle big numbers (above `Number.MAX_SAFE_INTEGER` === 2^53).
     * @default false
     */
    stringNumbers?: boolean | undefined;
    /**
     * How long the client will wait before killing a socket due to inactivity during initial connection.
     * @default 10000
     */
    connectTimeout?: number | undefined;
    /**
     * This option is used internally when you call `redis.monitor()` to tell Redis
     * to enter the monitor mode when the connection is established.
     *
     * @default false
     */
    monitor?: boolean | undefined;
    /**
     * The commands that don't get a reply due to the connection to the server is lost are
     * put into a queue and will be resent on reconnect (if allowed by the `retryStrategy` option).
     * This option is used to configure how many reconnection attempts should be allowed before
     * the queue is flushed with a `MaxRetriesPerRequestError` error.
     * Set this options to `null` instead of a number to let commands wait forever
     * until the connection is alive again.
     *
     * @default 20
     */
    maxRetriesPerRequest?: number | null | undefined;
    /**
     * @default 10000
     */
    maxLoadingRetryTime?: number | undefined;
    /**
     * @default false
     */
    enableAutoPipelining?: boolean | undefined;
    /**
     * @default []
     */
    autoPipeliningIgnoredCommands?: string[] | undefined;
    offlineQueue?: boolean | undefined;
    commandQueue?: boolean | undefined;
    /**
     *
     * By default, if the connection to Redis server has not been established, commands are added to a queue
     * and are executed once the connection is "ready" (when `enableReadyCheck` is true, "ready" means
     * the Redis server has loaded the database from disk, otherwise means the connection to the Redis
     * server has been established). If this option is false, when execute the command when the connection
     * isn't ready, an error will be returned.
     *
     * @default true
     */
    enableOfflineQueue?: boolean | undefined;
    /**
     * The client will sent an INFO command to check whether the server is still loading data from the disk (
     * which happens when the server is just launched) when the connection is established, and only wait until
     * the loading process is finished before emitting the `ready` event.
     *
     * @default true
     */
    enableReadyCheck?: boolean | undefined;
    /**
     * When a Redis instance is initialized, a connection to the server is immediately established. Set this to
     * true will delay the connection to the server until the first command is sent or `redis.connect()` is called
     * explicitly. When `redis.connect()` is called explicitly, a Promise is returned, which will be resolved
     * when the connection is ready or rejected when it fails. The rejection should be handled by the user.
     *
     * @default false
     */
    lazyConnect?: boolean | undefined;
    /**
     * @default undefined
     */
    scripts?: Record<string, {
        lua: string;
        numberOfKeys?: number | undefined;
        readOnly?: boolean | undefined;
    }> | undefined;
 }
 export declare type RedisOptions = CommonRedisOptions & SentinelConnectionOptions & StandaloneConnectionOptions;
 export declare const DEFAULT_REDIS_OPTIONS: RedisOptions;
--- a/backend/node_modules/ioredis/built/redis/RedisOptions.js
+++ b/backend/node_modules/ioredis/built/redis/RedisOptions.js
@@ -0,0 +1,58 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.DEFAULT_REDIS_OPTIONS = void 0;
 exports.DEFAULT_REDIS_OPTIONS = {
    // Connection
    port: 6379,
    host: "localhost",
    family: 0,
    connectTimeout: 10000,
    disconnectTimeout: 2000,
    retryStrategy: function (times) {
        return Math.min(times * 50, 2000);
    },
    keepAlive: 0,
    noDelay: true,
    connectionName: null,
    disableClientInfo: false,
    clientInfoTag: undefined,
    // Sentinel
    sentinels: null,
    name: null,
    role: "master",
    sentinelRetryStrategy: function (times) {
        return Math.min(times * 10, 1000);
    },
    sentinelReconnectStrategy: function () {
        // This strategy only applies when sentinels are used for detecting
        // a failover, not during initial master resolution.
        // The deployment can still function when some of the sentinels are down
        // for a long period of time, so we may not want to attempt reconnection
        // very often. Therefore the default interval is fairly long (1 minute).
        return 60000;
    },
    natMap: null,
    enableTLSForSentinelMode: false,
    updateSentinels: true,
    failoverDetector: false,
    // Status
    username: null,
    password: null,
    db: 0,
    // Others
    enableOfflineQueue: true,
    enableReadyCheck: true,
    autoResubscribe: true,
    autoResendUnfulfilledCommands: true,
    lazyConnect: false,
    keyPrefix: "",
    reconnectOnError: null,
    readOnly: false,
    stringNumbers: false,
    maxRetriesPerRequest: 20,
    maxLoadingRetryTime: 10000,
    enableAutoPipelining: false,
    autoPipeliningIgnoredCommands: [],
    sentinelMaxConnections: 10,
    blockingTimeoutGrace: 100,
 };
--- a/backend/node_modules/ioredis/built/redis/event_handler.d.ts
+++ b/backend/node_modules/ioredis/built/redis/event_handler.d.ts
@@ -0,0 +1,4 @@
 export declare function connectHandler(self: any): () => void;
 export declare function closeHandler(self: any): () => void;
 export declare function errorHandler(self: any): (error: any) => void;
 export declare function readyHandler(self: any): () => void;
--- a/backend/node_modules/ioredis/built/redis/event_handler.js
+++ b/backend/node_modules/ioredis/built/redis/event_handler.js
@@ -0,0 +1,315 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.readyHandler = exports.errorHandler = exports.closeHandler = exports.connectHandler = void 0;
 const redis_errors_1 = require("redis-errors");
 const Command_1 = require("../Command");
 const errors_1 = require("../errors");
 const utils_1 = require("../utils");
 const DataHandler_1 = require("../DataHandler");
 const debug = (0, utils_1.Debug)("connection");
 function connectHandler(self) {
    return function () {
        var _a;
        self.setStatus("connect");
        self.resetCommandQueue();
        // AUTH command should be processed before any other commands
        let flushed = false;
        const { connectionEpoch } = self;
        if (self.condition.auth) {
            self.auth(self.condition.auth, function (err) {
                if (connectionEpoch !== self.connectionEpoch) {
                    return;
                }
                if (err) {
                    if (err.message.indexOf("no password is set") !== -1) {
                        console.warn("[WARN] Redis server does not require a password, but a password was supplied.");
                    }
                    else if (err.message.indexOf("without any password configured for the default user") !== -1) {
                        console.warn("[WARN] This Redis server's `default` user does not require a password, but a password was supplied");
                    }
                    else if (err.message.indexOf("wrong number of arguments for 'auth' command") !== -1) {
                        console.warn(`[ERROR] The server returned "wrong number of arguments for 'auth' command". You are probably passing both username and password to Redis version 5 or below. You should only pass the 'password' option for Redis version 5 and under.`);
                    }
                    else {
                        flushed = true;
                        self.recoverFromFatalError(err, err);
                    }
                }
            });
        }
        if (self.condition.select) {
            self.select(self.condition.select).catch((err) => {
                // If the node is in cluster mode, select is disallowed.
                // In this case, reconnect won't help.
                self.silentEmit("error", err);
            });
        }
        /*
          No need to keep the reference of DataHandler here
          because we don't need to do the cleanup.
          `Stream#end()` will remove all listeners for us.
        */
        new DataHandler_1.default(self, {
            stringNumbers: self.options.stringNumbers,
        });
        const clientCommandPromises = [];
        if (self.options.connectionName) {
            debug("set the connection name [%s]", self.options.connectionName);
            clientCommandPromises.push(self.client("setname", self.options.connectionName).catch(utils_1.noop));
        }
        if (!self.options.disableClientInfo) {
            debug("set the client info");
            clientCommandPromises.push((0, utils_1.getPackageMeta)()
                .then((packageMeta) => {
                return self
                    .client("SETINFO", "LIB-VER", packageMeta.version)
                    .catch(utils_1.noop);
            })
                .catch(utils_1.noop));
            clientCommandPromises.push(self
                .client("SETINFO", "LIB-NAME", ((_a = self.options) === null || _a === void 0 ? void 0 : _a.clientInfoTag)
                ? `ioredis(${self.options.clientInfoTag})`
                : "ioredis")
                .catch(utils_1.noop));
        }
        Promise.all(clientCommandPromises)
            .catch(utils_1.noop)
            .finally(() => {
            if (!self.options.enableReadyCheck) {
                exports.readyHandler(self)();
            }
            if (self.options.enableReadyCheck) {
                self._readyCheck(function (err, info) {
                    if (connectionEpoch !== self.connectionEpoch) {
                        return;
                    }
                    if (err) {
                        if (!flushed) {
                            self.recoverFromFatalError(new Error("Ready check failed: " + err.message), err);
                        }
                    }
                    else {
                        if (self.connector.check(info)) {
                            exports.readyHandler(self)();
                        }
                        else {
                            self.disconnect(true);
                        }
                    }
                });
            }
        });
    };
 }
 exports.connectHandler = connectHandler;
 function abortError(command) {
    const err = new redis_errors_1.AbortError("Command aborted due to connection close");
    err.command = {
        name: command.name,
        args: command.args,
    };
    return err;
 }
 // If a contiguous set of pipeline commands starts from index zero then they
 // can be safely reattempted. If however we have a chain of pipelined commands
 // starting at index 1 or more it means we received a partial response before
 // the connection close and those pipelined commands must be aborted. For
 // example, if the queue looks like this: [2, 3, 4, 0, 1, 2] then after
 // aborting and purging we'll have a queue that looks like this: [0, 1, 2]
 function abortIncompletePipelines(commandQueue) {
    var _a;
    let expectedIndex = 0;
    for (let i = 0; i < commandQueue.length;) {
        const command = (_a = commandQueue.peekAt(i)) === null || _a === void 0 ? void 0 : _a.command;
        const pipelineIndex = command.pipelineIndex;
        if (pipelineIndex === undefined || pipelineIndex === 0) {
            expectedIndex = 0;
        }
        if (pipelineIndex !== undefined && pipelineIndex !== expectedIndex++) {
            commandQueue.remove(i, 1);
            command.reject(abortError(command));
            continue;
        }
        i++;
    }
 }
 // If only a partial transaction result was received before connection close,
 // we have to abort any transaction fragments that may have ended up in the
 // offline queue
 function abortTransactionFragments(commandQueue) {
    var _a;
    for (let i = 0; i < commandQueue.length;) {
        const command = (_a = commandQueue.peekAt(i)) === null || _a === void 0 ? void 0 : _a.command;
        if (command.name === "multi") {
            break;
        }
        if (command.name === "exec") {
            commandQueue.remove(i, 1);
            command.reject(abortError(command));
            break;
        }
        if (command.inTransaction) {
            commandQueue.remove(i, 1);
            command.reject(abortError(command));
        }
        else {
            i++;
        }
    }
 }
 function closeHandler(self) {
    return function () {
        const prevStatus = self.status;
        self.setStatus("close");
        if (self.commandQueue.length) {
            abortIncompletePipelines(self.commandQueue);
        }
        if (self.offlineQueue.length) {
            abortTransactionFragments(self.offlineQueue);
        }
        if (prevStatus === "ready") {
            if (!self.prevCondition) {
                self.prevCondition = self.condition;
            }
            if (self.commandQueue.length) {
                self.prevCommandQueue = self.commandQueue;
            }
        }
        if (self.manuallyClosing) {
            self.manuallyClosing = false;
            debug("skip reconnecting since the connection is manually closed.");
            return close();
        }
        if (typeof self.options.retryStrategy !== "function") {
            debug("skip reconnecting because `retryStrategy` is not a function");
            return close();
        }
        const retryDelay = self.options.retryStrategy(++self.retryAttempts);
        if (typeof retryDelay !== "number") {
            debug("skip reconnecting because `retryStrategy` doesn't return a number");
            return close();
        }
        debug("reconnect in %sms", retryDelay);
        self.setStatus("reconnecting", retryDelay);
        self.reconnectTimeout = setTimeout(function () {
            self.reconnectTimeout = null;
            self.connect().catch(utils_1.noop);
        }, retryDelay);
        const { maxRetriesPerRequest } = self.options;
        if (typeof maxRetriesPerRequest === "number") {
            if (maxRetriesPerRequest < 0) {
                debug("maxRetriesPerRequest is negative, ignoring...");
            }
            else {
                const remainder = self.retryAttempts % (maxRetriesPerRequest + 1);
                if (remainder === 0) {
                    debug("reach maxRetriesPerRequest limitation, flushing command queue...");
                    self.flushQueue(new errors_1.MaxRetriesPerRequestError(maxRetriesPerRequest));
                }
            }
        }
    };
    function close() {
        self.setStatus("end");
        self.flushQueue(new Error(utils_1.CONNECTION_CLOSED_ERROR_MSG));
    }
 }
 exports.closeHandler = closeHandler;
 function errorHandler(self) {
    return function (error) {
        debug("error: %s", error);
        self.silentEmit("error", error);
    };
 }
 exports.errorHandler = errorHandler;
 function readyHandler(self) {
    return function () {
        self.setStatus("ready");
        self.retryAttempts = 0;
        if (self.options.monitor) {
            self.call("monitor").then(() => self.setStatus("monitoring"), (error) => self.emit("error", error));
            const { sendCommand } = self;
            self.sendCommand = function (command) {
                if (Command_1.default.checkFlag("VALID_IN_MONITOR_MODE", command.name)) {
                    return sendCommand.call(self, command);
                }
                command.reject(new Error("Connection is in monitoring mode, can't process commands."));
                return command.promise;
            };
            self.once("close", function () {
                delete self.sendCommand;
            });
            return;
        }
        const finalSelect = self.prevCondition
            ? self.prevCondition.select
            : self.condition.select;
        if (self.options.readOnly) {
            debug("set the connection to readonly mode");
            self.readonly().catch(utils_1.noop);
        }
        if (self.prevCondition) {
            const condition = self.prevCondition;
            self.prevCondition = null;
            if (condition.subscriber && self.options.autoResubscribe) {
                // We re-select the previous db first since
                // `SELECT` command is not valid in sub mode.
                if (self.condition.select !== finalSelect) {
                    debug("connect to db [%d]", finalSelect);
                    self.select(finalSelect);
                }
                const subscribeChannels = condition.subscriber.channels("subscribe");
                if (subscribeChannels.length) {
                    debug("subscribe %d channels", subscribeChannels.length);
                    self.subscribe(subscribeChannels);
                }
                const psubscribeChannels = condition.subscriber.channels("psubscribe");
                if (psubscribeChannels.length) {
                    debug("psubscribe %d channels", psubscribeChannels.length);
                    self.psubscribe(psubscribeChannels);
                }
                const ssubscribeChannels = condition.subscriber.channels("ssubscribe");
                if (ssubscribeChannels.length) {
                    debug("ssubscribe %s", ssubscribeChannels.length);
                    for (const channel of ssubscribeChannels) {
                        self.ssubscribe(channel);
                    }
                }
            }
        }
        if (self.prevCommandQueue) {
            if (self.options.autoResendUnfulfilledCommands) {
                debug("resend %d unfulfilled commands", self.prevCommandQueue.length);
                while (self.prevCommandQueue.length > 0) {
                    const item = self.prevCommandQueue.shift();
                    if (item.select !== self.condition.select &&
                        item.command.name !== "select") {
                        self.select(item.select);
                    }
                    self.sendCommand(item.command, item.stream);
                }
            }
            else {
                self.prevCommandQueue = null;
            }
        }
        if (self.offlineQueue.length) {
            debug("send %d commands in offline queue", self.offlineQueue.length);
            const offlineQueue = self.offlineQueue;
            self.resetOfflineQueue();
            while (offlineQueue.length > 0) {
                const item = offlineQueue.shift();
                if (item.select !== self.condition.select &&
                    item.command.name !== "select") {
                    self.select(item.select);
                }
                self.sendCommand(item.command, item.stream);
            }
        }
        if (self.condition.select !== finalSelect) {
            debug("connect to db [%d]", finalSelect);
            self.select(finalSelect);
        }
    };
 }
 exports.readyHandler = readyHandler;
--- a/backend/node_modules/ioredis/built/transaction.d.ts
+++ b/backend/node_modules/ioredis/built/transaction.d.ts
@@ -0,0 +1,13 @@
 import { ChainableCommander } from "./utils/RedisCommander";
 export interface Transaction {
    pipeline(commands?: unknown[][]): ChainableCommander;
    multi(options: {
        pipeline: false;
    }): Promise<"OK">;
    multi(): ChainableCommander;
    multi(options: {
        pipeline: true;
    }): ChainableCommander;
    multi(commands?: unknown[][]): ChainableCommander;
 }
 export declare function addTransactionSupport(redis: any): void;
--- a/backend/node_modules/ioredis/built/transaction.js
+++ b/backend/node_modules/ioredis/built/transaction.js
@@ -0,0 +1,93 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.addTransactionSupport = void 0;
 const utils_1 = require("./utils");
 const standard_as_callback_1 = require("standard-as-callback");
 const Pipeline_1 = require("./Pipeline");
 function addTransactionSupport(redis) {
    redis.pipeline = function (commands) {
        const pipeline = new Pipeline_1.default(this);
        if (Array.isArray(commands)) {
            pipeline.addBatch(commands);
        }
        return pipeline;
    };
    const { multi } = redis;
    redis.multi = function (commands, options) {
        if (typeof options === "undefined" && !Array.isArray(commands)) {
            options = commands;
            commands = null;
        }
        if (options && options.pipeline === false) {
            return multi.call(this);
        }
        const pipeline = new Pipeline_1.default(this);
        // @ts-expect-error
        pipeline.multi();
        if (Array.isArray(commands)) {
            pipeline.addBatch(commands);
        }
        const exec = pipeline.exec;
        pipeline.exec = function (callback) {
            // Wait for the cluster to be connected, since we need nodes information before continuing
            if (this.isCluster && !this.redis.slots.length) {
                if (this.redis.status === "wait")
                    this.redis.connect().catch(utils_1.noop);
                return (0, standard_as_callback_1.default)(new Promise((resolve, reject) => {
                    this.redis.delayUntilReady((err) => {
                        if (err) {
                            reject(err);
                            return;
                        }
                        this.exec(pipeline).then(resolve, reject);
                    });
                }), callback);
            }
            if (this._transactions > 0) {
                exec.call(pipeline);
            }
            // Returns directly when the pipeline
            // has been called multiple times (retries).
            if (this.nodeifiedPromise) {
                return exec.call(pipeline);
            }
            const promise = exec.call(pipeline);
            return (0, standard_as_callback_1.default)(promise.then(function (result) {
                const execResult = result[result.length - 1];
                if (typeof execResult === "undefined") {
                    throw new Error("Pipeline cannot be used to send any commands when the `exec()` has been called on it.");
                }
                if (execResult[0]) {
                    execResult[0].previousErrors = [];
                    for (let i = 0; i < result.length - 1; ++i) {
                        if (result[i][0]) {
                            execResult[0].previousErrors.push(result[i][0]);
                        }
                    }
                    throw execResult[0];
                }
                return (0, utils_1.wrapMultiResult)(execResult[1]);
            }), callback);
        };
        // @ts-expect-error
        const { execBuffer } = pipeline;
        // @ts-expect-error
        pipeline.execBuffer = function (callback) {
            if (this._transactions > 0) {
                execBuffer.call(pipeline);
            }
            return pipeline.exec(callback);
        };
        return pipeline;
    };
    const { exec } = redis;
    redis.exec = function (callback) {
        return (0, standard_as_callback_1.default)(exec.call(this).then(function (results) {
            if (Array.isArray(results)) {
                results = (0, utils_1.wrapMultiResult)(results);
            }
            return results;
        }), callback);
    };
 }
 exports.addTransactionSupport = addTransactionSupport;
--- a/backend/node_modules/ioredis/built/types.d.ts
+++ b/backend/node_modules/ioredis/built/types.d.ts
@@ -0,0 +1,33 @@
 /// <reference types="node" />
 import { Socket } from "net";
 import { TLSSocket } from "tls";
 export declare type Callback<T = any> = (err?: Error | null, result?: T) => void;
 export declare type NetStream = Socket | TLSSocket;
 export declare type CommandParameter = string | Buffer | number | any[];
 export interface Respondable {
    name: string;
    args: CommandParameter[];
    resolve(result: any): void;
    reject(error: Error): void;
 }
 export interface PipelineWriteableStream {
    isPipeline: true;
    write(data: string | Buffer): unknown;
    destination: {
        redis: {
            stream: NetStream;
        };
    };
 }
 export declare type WriteableStream = NetStream | PipelineWriteableStream;
 export interface CommandItem {
    command: Respondable;
    stream: WriteableStream;
    select: number;
 }
 export interface ScanStreamOptions {
    match?: string;
    type?: string;
    count?: number;
    noValues?: boolean;
 }
--- a/backend/node_modules/ioredis/built/types.js
+++ b/backend/node_modules/ioredis/built/types.js
@@ -0,0 +1,2 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
--- a/backend/node_modules/ioredis/built/utils/Commander.d.ts
+++ b/backend/node_modules/ioredis/built/utils/Commander.d.ts
@@ -0,0 +1,50 @@
 import Command from "../Command";
 import { WriteableStream } from "../types";
 import RedisCommander, { ClientContext } from "./RedisCommander";
 export interface CommanderOptions {
    keyPrefix?: string | undefined;
    showFriendlyErrorStack?: boolean | undefined;
 }
 declare class Commander<Context extends ClientContext = {
    type: "default";
 }> {
    options: CommanderOptions;
    /**
     * @ignore
     */
    scriptsSet: {};
    /**
     * @ignore
     */
    addedBuiltinSet: Set<string>;
    /**
     * Return supported builtin commands
     */
    getBuiltinCommands(): string[];
    /**
     * Create a builtin command
     */
    createBuiltinCommand(commandName: string): {
        string: any;
        buffer: any;
    };
    /**
     * Create add builtin command
     */
    addBuiltinCommand(commandName: string): void;
    /**
     * Define a custom command using lua script
     */
    defineCommand(name: string, definition: {
        lua: string;
        numberOfKeys?: number;
        readOnly?: boolean;
    }): void;
    /**
     * @ignore
     */
    sendCommand(command: Command, stream?: WriteableStream, node?: unknown): unknown;
 }
 interface Commander<Context> extends RedisCommander<Context> {
 }
 export default Commander;
--- a/backend/node_modules/ioredis/built/utils/Commander.js
+++ b/backend/node_modules/ioredis/built/utils/Commander.js
@@ -0,0 +1,117 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const commands_1 = require("@ioredis/commands");
 const autoPipelining_1 = require("../autoPipelining");
 const Command_1 = require("../Command");
 const Script_1 = require("../Script");
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 class Commander {
    constructor() {
        this.options = {};
        /**
         * @ignore
         */
        this.scriptsSet = {};
        /**
         * @ignore
         */
        this.addedBuiltinSet = new Set();
    }
    /**
     * Return supported builtin commands
     */
    getBuiltinCommands() {
        return commands.slice(0);
    }
    /**
     * Create a builtin command
     */
    createBuiltinCommand(commandName) {
        return {
            string: generateFunction(null, commandName, "utf8"),
            buffer: generateFunction(null, commandName, null),
        };
    }
    /**
     * Create add builtin command
     */
    addBuiltinCommand(commandName) {
        this.addedBuiltinSet.add(commandName);
        this[commandName] = generateFunction(commandName, commandName, "utf8");
        this[commandName + "Buffer"] = generateFunction(commandName + "Buffer", commandName, null);
    }
    /**
     * Define a custom command using lua script
     */
    defineCommand(name, definition) {
        const script = new Script_1.default(definition.lua, definition.numberOfKeys, this.options.keyPrefix, definition.readOnly);
        this.scriptsSet[name] = script;
        this[name] = generateScriptingFunction(name, name, script, "utf8");
        this[name + "Buffer"] = generateScriptingFunction(name + "Buffer", name, script, null);
    }
    /**
     * @ignore
     */
    sendCommand(command, stream, node) {
        throw new Error('"sendCommand" is not implemented');
    }
 }
 const commands = commands_1.list.filter((command) => command !== "monitor");
 commands.push("sentinel");
 commands.forEach(function (commandName) {
    Commander.prototype[commandName] = generateFunction(commandName, commandName, "utf8");
    Commander.prototype[commandName + "Buffer"] = generateFunction(commandName + "Buffer", commandName, null);
 });
 Commander.prototype.call = generateFunction("call", "utf8");
 Commander.prototype.callBuffer = generateFunction("callBuffer", null);
 // @ts-expect-error
 Commander.prototype.send_command = Commander.prototype.call;
 function generateFunction(functionName, _commandName, _encoding) {
    if (typeof _encoding === "undefined") {
        _encoding = _commandName;
        _commandName = null;
    }
    return function (...args) {
        const commandName = (_commandName || args.shift());
        let callback = args[args.length - 1];
        if (typeof callback === "function") {
            args.pop();
        }
        else {
            callback = undefined;
        }
        const options = {
            errorStack: this.options.showFriendlyErrorStack ? new Error() : undefined,
            keyPrefix: this.options.keyPrefix,
            replyEncoding: _encoding,
        };
        // No auto pipeline, use regular command sending
        if (!(0, autoPipelining_1.shouldUseAutoPipelining)(this, functionName, commandName)) {
            return this.sendCommand(
            // @ts-expect-error
            new Command_1.default(commandName, args, options, callback));
        }
        // Create a new pipeline and make sure it's scheduled
        return (0, autoPipelining_1.executeWithAutoPipelining)(this, functionName, commandName, 
        // @ts-expect-error
        args, callback);
    };
 }
 function generateScriptingFunction(functionName, commandName, script, encoding) {
    return function (...args) {
        const callback = typeof args[args.length - 1] === "function" ? args.pop() : undefined;
        const options = {
            replyEncoding: encoding,
        };
        if (this.options.showFriendlyErrorStack) {
            options.errorStack = new Error();
        }
        // No auto pipeline, use regular command sending
        if (!(0, autoPipelining_1.shouldUseAutoPipelining)(this, functionName, commandName)) {
            return script.execute(this, args, options, callback);
        }
        // Create a new pipeline and make sure it's scheduled
        return (0, autoPipelining_1.executeWithAutoPipelining)(this, functionName, commandName, args, callback);
    };
 }
 exports.default = Commander;
--- a/backend/node_modules/ioredis/built/utils/RedisCommander.d.ts
+++ b/backend/node_modules/ioredis/built/utils/RedisCommander.d.ts
--- a/backend/node_modules/ioredis/built/utils/RedisCommander.js
+++ b/backend/node_modules/ioredis/built/utils/RedisCommander.js
@@ -0,0 +1,7 @@
 "use strict";
 /**
 * This file is generated by @ioredis/interface-generator.
 * Don't edit it manually. Instead, run `npm run generate` to update
 * this file.
 */
 Object.defineProperty(exports, "__esModule", { value: true });
--- a/backend/node_modules/ioredis/built/utils/applyMixin.d.ts
+++ b/backend/node_modules/ioredis/built/utils/applyMixin.d.ts
@@ -0,0 +1,3 @@
 declare type Constructor = new (...args: any[]) => void;
 declare function applyMixin(derivedConstructor: Constructor, mixinConstructor: Constructor): void;
 export default applyMixin;
--- a/backend/node_modules/ioredis/built/utils/applyMixin.js
+++ b/backend/node_modules/ioredis/built/utils/applyMixin.js
@@ -0,0 +1,8 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 function applyMixin(derivedConstructor, mixinConstructor) {
    Object.getOwnPropertyNames(mixinConstructor.prototype).forEach((name) => {
        Object.defineProperty(derivedConstructor.prototype, name, Object.getOwnPropertyDescriptor(mixinConstructor.prototype, name));
    });
 }
 exports.default = applyMixin;
--- a/backend/node_modules/ioredis/built/utils/argumentParsers.d.ts
+++ b/backend/node_modules/ioredis/built/utils/argumentParsers.d.ts
@@ -0,0 +1,14 @@
 import { CommandParameter } from "../types";
 /**
 * Parses a command parameter as seconds and converts to milliseconds.
 * @param arg - The command parameter representing seconds
 * @returns The value in milliseconds, 0 if value is <= 0, or undefined if parsing fails
 */
 export declare const parseSecondsArgument: (arg: CommandParameter | undefined) => number | undefined;
 /**
 * Parses the BLOCK option from Redis command arguments (e.g., XREAD, XREADGROUP).
 * @param args - Array of command parameters to search for the BLOCK option
 * @returns The block duration in milliseconds, 0 if duration is <= 0,
 *          null if BLOCK option is not found, or undefined if BLOCK is found but duration is invalid
 */
 export declare const parseBlockOption: (args: CommandParameter[]) => number | null | undefined;
--- a/backend/node_modules/ioredis/built/utils/argumentParsers.js
+++ b/backend/node_modules/ioredis/built/utils/argumentParsers.js
@@ -0,0 +1,74 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.parseBlockOption = exports.parseSecondsArgument = void 0;
 /**
 * Parses a command parameter to a number.
 * @param arg - The command parameter to parse (number, string, or Buffer)
 * @returns The parsed number, or undefined if parsing fails or arg is undefined
 */
 const parseNumberArgument = (arg) => {
    if (typeof arg === "number") {
        return arg;
    }
    if (Buffer.isBuffer(arg)) {
        return parseNumberArgument(arg.toString());
    }
    if (typeof arg === "string") {
        const value = Number(arg);
        return Number.isFinite(value) ? value : undefined;
    }
    return undefined;
 };
 /**
 * Parses a command parameter to a string.
 * @param arg - The command parameter to parse (string or Buffer)
 * @returns The parsed string, or undefined if arg is not a string/Buffer or is undefined
 */
 const parseStringArgument = (arg) => {
    if (typeof arg === "string") {
        return arg;
    }
    if (Buffer.isBuffer(arg)) {
        return arg.toString();
    }
    return undefined;
 };
 /**
 * Parses a command parameter as seconds and converts to milliseconds.
 * @param arg - The command parameter representing seconds
 * @returns The value in milliseconds, 0 if value is <= 0, or undefined if parsing fails
 */
 const parseSecondsArgument = (arg) => {
    const value = parseNumberArgument(arg);
    if (value === undefined) {
        return undefined;
    }
    if (value <= 0) {
        return 0;
    }
    return value * 1000;
 };
 exports.parseSecondsArgument = parseSecondsArgument;
 /**
 * Parses the BLOCK option from Redis command arguments (e.g., XREAD, XREADGROUP).
 * @param args - Array of command parameters to search for the BLOCK option
 * @returns The block duration in milliseconds, 0 if duration is <= 0,
 *          null if BLOCK option is not found, or undefined if BLOCK is found but duration is invalid
 */
 const parseBlockOption = (args) => {
    for (let i = 0; i < args.length; i++) {
        const token = parseStringArgument(args[i]);
        if (token && token.toLowerCase() === "block") {
            const duration = parseNumberArgument(args[i + 1]);
            if (duration === undefined) {
                return undefined;
            }
            if (duration <= 0) {
                return 0;
            }
            return duration;
        }
    }
    return null;
 };
 exports.parseBlockOption = parseBlockOption;
--- a/backend/node_modules/ioredis/built/utils/debug.d.ts
+++ b/backend/node_modules/ioredis/built/utils/debug.d.ts
@@ -0,0 +1,16 @@
 declare const MAX_ARGUMENT_LENGTH = 200;
 /**
 * helper function that tried to get a string value for
 * arbitrary "debug" arg
 */
 declare function getStringValue(v: any): string | void;
 /**
 * helper function that redacts a string representation of a "debug" arg
 */
 declare function genRedactedString(str: string, maxLen: number): string;
 /**
 * a wrapper for the `debug` module, used to generate
 * "debug functions" that trim the values in their output
 */
 export default function genDebugFunction(namespace: string): (...args: any[]) => void;
 export { MAX_ARGUMENT_LENGTH, getStringValue, genRedactedString };
--- a/backend/node_modules/ioredis/built/utils/debug.js
+++ b/backend/node_modules/ioredis/built/utils/debug.js
@@ -0,0 +1,95 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.genRedactedString = exports.getStringValue = exports.MAX_ARGUMENT_LENGTH = void 0;
 const debug_1 = require("debug");
 const MAX_ARGUMENT_LENGTH = 200;
 exports.MAX_ARGUMENT_LENGTH = MAX_ARGUMENT_LENGTH;
 const NAMESPACE_PREFIX = "ioredis";
 /**
 * helper function that tried to get a string value for
 * arbitrary "debug" arg
 */
 function getStringValue(v) {
    if (v === null) {
        return;
    }
    switch (typeof v) {
        case "boolean":
            return;
        case "number":
            return;
        case "object":
            if (Buffer.isBuffer(v)) {
                return v.toString("hex");
            }
            if (Array.isArray(v)) {
                return v.join(",");
            }
            try {
                return JSON.stringify(v);
            }
            catch (e) {
                return;
            }
        case "string":
            return v;
    }
 }
 exports.getStringValue = getStringValue;
 /**
 * helper function that redacts a string representation of a "debug" arg
 */
 function genRedactedString(str, maxLen) {
    const { length } = str;
    return length <= maxLen
        ? str
        : str.slice(0, maxLen) + ' ... <REDACTED full-length="' + length + '">';
 }
 exports.genRedactedString = genRedactedString;
 /**
 * a wrapper for the `debug` module, used to generate
 * "debug functions" that trim the values in their output
 */
 function genDebugFunction(namespace) {
    const fn = (0, debug_1.default)(`${NAMESPACE_PREFIX}:${namespace}`);
    function wrappedDebug(...args) {
        if (!fn.enabled) {
            return; // no-op
        }
        // we skip the first arg because that is the message
        for (let i = 1; i < args.length; i++) {
            const str = getStringValue(args[i]);
            if (typeof str === "string" && str.length > MAX_ARGUMENT_LENGTH) {
                args[i] = genRedactedString(str, MAX_ARGUMENT_LENGTH);
            }
        }
        return fn.apply(null, args);
    }
    Object.defineProperties(wrappedDebug, {
        namespace: {
            get() {
                return fn.namespace;
            },
        },
        enabled: {
            get() {
                return fn.enabled;
            },
        },
        destroy: {
            get() {
                return fn.destroy;
            },
        },
        log: {
            get() {
                return fn.log;
            },
            set(l) {
                fn.log = l;
            },
        },
    });
    return wrappedDebug;
 }
 exports.default = genDebugFunction;
--- a/backend/node_modules/ioredis/built/utils/index.d.ts
+++ b/backend/node_modules/ioredis/built/utils/index.d.ts
@@ -0,0 +1,124 @@
 /// <reference types="node" />
 import { defaults, noop } from "./lodash";
 import { Callback } from "../types";
 import Debug from "./debug";
 /**
 * Convert a buffer to string, supports buffer array
 *
 * @example
 * ```js
 * const input = [Buffer.from('foo'), [Buffer.from('bar')]]
 * const res = convertBufferToString(input, 'utf8')
 * expect(res).to.eql(['foo', ['bar']])
 * ```
 */
 export declare function convertBufferToString(value: any, encoding?: BufferEncoding): any;
 /**
 * Convert a list of results to node-style
 *
 * @example
 * ```js
 * const input = ['a', 'b', new Error('c'), 'd']
 * const output = exports.wrapMultiResult(input)
 * expect(output).to.eql([[null, 'a'], [null, 'b'], [new Error('c')], [null, 'd'])
 * ```
 */
 export declare function wrapMultiResult(arr: unknown[] | null): unknown[][] | null;
 /**
 * Detect if the argument is a int
 * @example
 * ```js
 * > isInt('123')
 * true
 * > isInt('123.3')
 * false
 * > isInt('1x')
 * false
 * > isInt(123)
 * true
 * > isInt(true)
 * false
 * ```
 */
 export declare function isInt(value: any): value is string;
 /**
 * Pack an array to an Object
 *
 * @example
 * ```js
 * > packObject(['a', 'b', 'c', 'd'])
 * { a: 'b', c: 'd' }
 * ```
 */
 export declare function packObject(array: any[]): Record<string, any>;
 /**
 * Return a callback with timeout
 */
 export declare function timeout<T>(callback: Callback<T>, timeout: number): Callback<T>;
 /**
 * Convert an object to an array
 * @example
 * ```js
 * > convertObjectToArray({ a: '1' })
 * ['a', '1']
 * ```
 */
 export declare function convertObjectToArray<T>(obj: Record<string, T>): (string | T)[];
 /**
 * Convert a map to an array
 * @example
 * ```js
 * > convertMapToArray(new Map([[1, '2']]))
 * [1, '2']
 * ```
 */
 export declare function convertMapToArray<K, V>(map: Map<K, V>): (K | V)[];
 /**
 * Convert a non-string arg to a string
 */
 export declare function toArg(arg: any): string;
 /**
 * Optimize error stack
 *
 * @param error actually error
 * @param friendlyStack the stack that more meaningful
 * @param filterPath only show stacks with the specified path
 */
 export declare function optimizeErrorStack(error: Error, friendlyStack: string, filterPath: string): Error;
 /**
 * Parse the redis protocol url
 */
 export declare function parseURL(url: string): Record<string, unknown>;
 interface TLSOptions {
    port: number;
    host: string;
    [key: string]: any;
 }
 /**
 * Resolve TLS profile shortcut in connection options
 */
 export declare function resolveTLSProfile(options: TLSOptions): TLSOptions;
 /**
 * Get a random element from `array`
 */
 export declare function sample<T>(array: T[], from?: number): T;
 /**
 * Shuffle the array using the Fisher-Yates Shuffle.
 * This method will mutate the original array.
 */
 export declare function shuffle<T>(array: T[]): T[];
 /**
 * Error message for connection being disconnected
 */
 export declare const CONNECTION_CLOSED_ERROR_MSG = "Connection is closed.";
 export declare function zipMap<K, V>(keys: K[], values: V[]): Map<K, V>;
 /**
 * Retrieves cached package metadata from package.json.
 *
 * @internal
 * @returns {Promise<{version: string} | null>} Package metadata or null if unavailable
 */
 export declare function getPackageMeta(): Promise<{
    version: string;
 }>;
 export { Debug, defaults, noop };
--- a/backend/node_modules/ioredis/built/utils/index.js
+++ b/backend/node_modules/ioredis/built/utils/index.js
@@ -0,0 +1,332 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.noop = exports.defaults = exports.Debug = exports.getPackageMeta = exports.zipMap = exports.CONNECTION_CLOSED_ERROR_MSG = exports.shuffle = exports.sample = exports.resolveTLSProfile = exports.parseURL = exports.optimizeErrorStack = exports.toArg = exports.convertMapToArray = exports.convertObjectToArray = exports.timeout = exports.packObject = exports.isInt = exports.wrapMultiResult = exports.convertBufferToString = void 0;
 const fs_1 = require("fs");
 const path_1 = require("path");
 const url_1 = require("url");
 const lodash_1 = require("./lodash");
 Object.defineProperty(exports, "defaults", { enumerable: true, get: function () { return lodash_1.defaults; } });
 Object.defineProperty(exports, "noop", { enumerable: true, get: function () { return lodash_1.noop; } });
 const debug_1 = require("./debug");
 exports.Debug = debug_1.default;
 const TLSProfiles_1 = require("../constants/TLSProfiles");
 /**
 * Convert a buffer to string, supports buffer array
 *
 * @example
 * ```js
 * const input = [Buffer.from('foo'), [Buffer.from('bar')]]
 * const res = convertBufferToString(input, 'utf8')
 * expect(res).to.eql(['foo', ['bar']])
 * ```
 */
 function convertBufferToString(value, encoding) {
    if (value instanceof Buffer) {
        return value.toString(encoding);
    }
    if (Array.isArray(value)) {
        const length = value.length;
        const res = Array(length);
        for (let i = 0; i < length; ++i) {
            res[i] =
                value[i] instanceof Buffer && encoding === "utf8"
                    ? value[i].toString()
                    : convertBufferToString(value[i], encoding);
        }
        return res;
    }
    return value;
 }
 exports.convertBufferToString = convertBufferToString;
 /**
 * Convert a list of results to node-style
 *
 * @example
 * ```js
 * const input = ['a', 'b', new Error('c'), 'd']
 * const output = exports.wrapMultiResult(input)
 * expect(output).to.eql([[null, 'a'], [null, 'b'], [new Error('c')], [null, 'd'])
 * ```
 */
 function wrapMultiResult(arr) {
    // When using WATCH/EXEC transactions, the EXEC will return
    // a null instead of an array
    if (!arr) {
        return null;
    }
    const result = [];
    const length = arr.length;
    for (let i = 0; i < length; ++i) {
        const item = arr[i];
        if (item instanceof Error) {
            result.push([item]);
        }
        else {
            result.push([null, item]);
        }
    }
    return result;
 }
 exports.wrapMultiResult = wrapMultiResult;
 /**
 * Detect if the argument is a int
 * @example
 * ```js
 * > isInt('123')
 * true
 * > isInt('123.3')
 * false
 * > isInt('1x')
 * false
 * > isInt(123)
 * true
 * > isInt(true)
 * false
 * ```
 */
 function isInt(value) {
    const x = parseFloat(value);
    return !isNaN(value) && (x | 0) === x;
 }
 exports.isInt = isInt;
 /**
 * Pack an array to an Object
 *
 * @example
 * ```js
 * > packObject(['a', 'b', 'c', 'd'])
 * { a: 'b', c: 'd' }
 * ```
 */
 function packObject(array) {
    const result = {};
    const length = array.length;
    for (let i = 1; i < length; i += 2) {
        result[array[i - 1]] = array[i];
    }
    return result;
 }
 exports.packObject = packObject;
 /**
 * Return a callback with timeout
 */
 function timeout(callback, timeout) {
    let timer = null;
    const run = function () {
        if (timer) {
            clearTimeout(timer);
            timer = null;
            callback.apply(this, arguments);
        }
    };
    timer = setTimeout(run, timeout, new Error("timeout"));
    return run;
 }
 exports.timeout = timeout;
 /**
 * Convert an object to an array
 * @example
 * ```js
 * > convertObjectToArray({ a: '1' })
 * ['a', '1']
 * ```
 */
 function convertObjectToArray(obj) {
    const result = [];
    const keys = Object.keys(obj); // Object.entries requires node 7+
    for (let i = 0, l = keys.length; i < l; i++) {
        result.push(keys[i], obj[keys[i]]);
    }
    return result;
 }
 exports.convertObjectToArray = convertObjectToArray;
 /**
 * Convert a map to an array
 * @example
 * ```js
 * > convertMapToArray(new Map([[1, '2']]))
 * [1, '2']
 * ```
 */
 function convertMapToArray(map) {
    const result = [];
    let pos = 0;
    map.forEach(function (value, key) {
        result[pos] = key;
        result[pos + 1] = value;
        pos += 2;
    });
    return result;
 }
 exports.convertMapToArray = convertMapToArray;
 /**
 * Convert a non-string arg to a string
 */
 function toArg(arg) {
    if (arg === null || typeof arg === "undefined") {
        return "";
    }
    return String(arg);
 }
 exports.toArg = toArg;
 /**
 * Optimize error stack
 *
 * @param error actually error
 * @param friendlyStack the stack that more meaningful
 * @param filterPath only show stacks with the specified path
 */
 function optimizeErrorStack(error, friendlyStack, filterPath) {
    const stacks = friendlyStack.split("\n");
    let lines = "";
    let i;
    for (i = 1; i < stacks.length; ++i) {
        if (stacks[i].indexOf(filterPath) === -1) {
            break;
        }
    }
    for (let j = i; j < stacks.length; ++j) {
        lines += "\n" + stacks[j];
    }
    if (error.stack) {
        const pos = error.stack.indexOf("\n");
        error.stack = error.stack.slice(0, pos) + lines;
    }
    return error;
 }
 exports.optimizeErrorStack = optimizeErrorStack;
 /**
 * Parse the redis protocol url
 */
 function parseURL(url) {
    if (isInt(url)) {
        return { port: url };
    }
    let parsed = (0, url_1.parse)(url, true, true);
    if (!parsed.slashes && url[0] !== "/") {
        url = "//" + url;
        parsed = (0, url_1.parse)(url, true, true);
    }
    const options = parsed.query || {};
    const result = {};
    if (parsed.auth) {
        const index = parsed.auth.indexOf(":");
        result.username = index === -1 ? parsed.auth : parsed.auth.slice(0, index);
        result.password = index === -1 ? "" : parsed.auth.slice(index + 1);
    }
    if (parsed.pathname) {
        if (parsed.protocol === "redis:" || parsed.protocol === "rediss:") {
            if (parsed.pathname.length > 1) {
                result.db = parsed.pathname.slice(1);
            }
        }
        else {
            result.path = parsed.pathname;
        }
    }
    if (parsed.host) {
        result.host = parsed.hostname;
    }
    if (parsed.port) {
        result.port = parsed.port;
    }
    if (typeof options.family === "string") {
        const intFamily = Number.parseInt(options.family, 10);
        if (!Number.isNaN(intFamily)) {
            result.family = intFamily;
        }
    }
    (0, lodash_1.defaults)(result, options);
    return result;
 }
 exports.parseURL = parseURL;
 /**
 * Resolve TLS profile shortcut in connection options
 */
 function resolveTLSProfile(options) {
    let tls = options === null || options === void 0 ? void 0 : options.tls;
    if (typeof tls === "string")
        tls = { profile: tls };
    const profile = TLSProfiles_1.default[tls === null || tls === void 0 ? void 0 : tls.profile];
    if (profile) {
        tls = Object.assign({}, profile, tls);
        delete tls.profile;
        options = Object.assign({}, options, { tls });
    }
    return options;
 }
 exports.resolveTLSProfile = resolveTLSProfile;
 /**
 * Get a random element from `array`
 */
 function sample(array, from = 0) {
    const length = array.length;
    if (from >= length) {
        return null;
    }
    return array[from + Math.floor(Math.random() * (length - from))];
 }
 exports.sample = sample;
 /**
 * Shuffle the array using the Fisher-Yates Shuffle.
 * This method will mutate the original array.
 */
 function shuffle(array) {
    let counter = array.length;
    // While there are elements in the array
    while (counter > 0) {
        // Pick a random index
        const index = Math.floor(Math.random() * counter);
        // Decrease counter by 1
        counter--;
        // And swap the last element with it
        [array[counter], array[index]] = [array[index], array[counter]];
    }
    return array;
 }
 exports.shuffle = shuffle;
 /**
 * Error message for connection being disconnected
 */
 exports.CONNECTION_CLOSED_ERROR_MSG = "Connection is closed.";
 function zipMap(keys, values) {
    const map = new Map();
    keys.forEach((key, index) => {
        map.set(key, values[index]);
    });
    return map;
 }
 exports.zipMap = zipMap;
 /**
 * Memoized package metadata to avoid repeated file system reads.
 *
 * @internal
 */
 let cachedPackageMeta = null;
 /**
 * Retrieves cached package metadata from package.json.
 *
 * @internal
 * @returns {Promise<{version: string} | null>} Package metadata or null if unavailable
 */
 async function getPackageMeta() {
    if (cachedPackageMeta) {
        return cachedPackageMeta;
    }
    try {
        const filePath = (0, path_1.resolve)(__dirname, "..", "..", "package.json");
        const data = await fs_1.promises.readFile(filePath, "utf8");
        const parsed = JSON.parse(data);
        cachedPackageMeta = {
            version: parsed.version,
        };
        return cachedPackageMeta;
    }
    catch (err) {
        cachedPackageMeta = {
            version: "error-fetching-version",
        };
        return cachedPackageMeta;
    }
 }
 exports.getPackageMeta = getPackageMeta;
--- a/Show More
+++ b/Show More
		`@@ -0,0 +1,2 @@`
							`"use strict";`
							`Object.defineProperty(exports, "__esModule", { value: true });`
		`@@ -0,0 +1,2 @@`
							`import MaxRetriesPerRequestError from "./MaxRetriesPerRequestError";`
							`export { MaxRetriesPerRequestError };`