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annotate react_games/backend/routes/todo.ts @ 96:70401cf61e97

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[Seobeo] Added logging.
author June Park <parkjune1995@gmail.com>
date Fri, 02 Jan 2026 19:16:17 -0800
parents fb9bcd3145cb
children
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37
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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1 import { Router } from 'express';
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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2 import * as fs from 'node:fs/promises';
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3 import path from 'node:path';
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4 import crypto from 'node:crypto';
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5
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6 type Todo = { id: string; value: string; status: number };
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7
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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8 /** Idk aynthing about encryption but this seemed fine to me so just going to use this... **/
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9 const ALGO = 'aes-256-gcm';
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10 const KEYLEN = 32;
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11 const IVLEN = 12;
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12 const SALTLEN = 16;
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13 const PEPPER = process.env.TODO_PEPPER ?? ''; // optional server-side secret
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14
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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15 type EncryptedPayload = {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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16 v: 1;
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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17 kdf: 'scrypt';
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18 salt: string; // base64
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19 iv: string; // base64
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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20 tag: string; // base64
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21 ciphertext: string;// base64
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22 };
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23
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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24 // ---- crypto helpers --------------------------------------------------------
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25
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26 function kdf(passphrase: string, salt: Buffer): Buffer {
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27 // scryptSync is fine for small payloads; use async/promisified if you prefer.
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28 return crypto.scryptSync(passphrase, salt, KEYLEN);
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29 }
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30
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31 function encryptJSON(data: unknown, keyword: string): EncryptedPayload {
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32 const salt = crypto.randomBytes(SALTLEN);
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33 const key = kdf(keyword + PEPPER, salt);
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34 const iv = crypto.randomBytes(IVLEN);
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35
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36 const cipher = crypto.createCipheriv(ALGO, key, iv);
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37 const plaintext = Buffer.from(JSON.stringify(data), 'utf8');
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38 const ciphertext = Buffer.concat([cipher.update(plaintext), cipher.final()]);
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39 const tag = cipher.getAuthTag();
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40
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41 return {
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42 v: 1,
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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43 kdf: 'scrypt',
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44 salt: salt.toString('base64'),
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45 iv: iv.toString('base64'),
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46 tag: tag.toString('base64'),
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47 ciphertext: ciphertext.toString('base64'),
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48 };
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49 }
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50
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51 function decryptJSON(payload: EncryptedPayload, keyword: string): any {
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52 const salt = Buffer.from(payload.salt, 'base64');
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53 const iv = Buffer.from(payload.iv, 'base64');
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54 const tag = Buffer.from(payload.tag, 'base64');
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55 const ciphertext = Buffer.from(payload.ciphertext, 'base64');
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56
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57 const key = kdf(keyword + PEPPER, salt);
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58 const decipher = crypto.createDecipheriv(ALGO, key, iv);
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59 decipher.setAuthTag(tag);
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60
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61 const plaintext = Buffer.concat([decipher.update(ciphertext), decipher.final()]);
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62 return JSON.parse(plaintext.toString('utf8'));
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63 }
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64
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65 // ---- path helper: derive a file path from keyword --------------------------
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66
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67 function pathForKeyword(baseDir: string, keyword: string): string {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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68 // Hash the keyword so you don’t leak it in the filename and to avoid FS-unsafe chars.
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69 const h = crypto.createHash('sha256').update(keyword, 'utf8').digest('hex');
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70 // Optional sharding to keep directories small:
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71 return path.join(baseDir, h.slice(0, 2), `${h}.json`);
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72 }
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73
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74 // ---- router ----------------------------------------------------------------
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75 const getInitialTodos = () => [
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76 {
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77 id: crypto.randomUUID(),
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78 value: "Hello from TODO",
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79 status: 0,
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80 }
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81 ]
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82 export function createTodoRouter(dataFileOrDir: string) {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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83 const router = Router();
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84
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85 // Support both a file path (old) or a directory (new). We’ll store under that directory.
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86 const baseDir = path.extname(dataFileOrDir)
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87 ? path.dirname(dataFileOrDir)
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88 : dataFileOrDir;
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89
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90 const requireKeyword = (req: any): string => {
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91 const key = (typeof req.query.key === 'string' && req.query.key) || req.header('x-keyword');
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92 if (typeof key !== 'string' || !key.trim()) {
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93 throw Object.assign(new Error('Missing ?key= query or x-keyword header'), { status: 400 });
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94 }
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95 return key.trim();
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96 };
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97
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98 const readTodos = async (userKeyword: string): Promise<Todo[]> => {
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99 const filePath = pathForKeyword(baseDir, userKeyword);
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100 try {
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101 const raw = await fs.readFile(filePath, 'utf8');
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102 const parsed = JSON.parse(raw);
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103
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104 // If this looks like an encrypted payload, decrypt; else treat as plaintext array for backward compat.
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105 if (parsed && parsed.ciphertext && parsed.iv && parsed.tag && parsed.salt) {
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106 return decryptJSON(parsed as EncryptedPayload, userKeyword) as Todo[];
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107 }
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108 // fallback (legacy plaintext)
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109 return parsed as Todo[];
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110 } catch (e: any) {
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111 if (e?.code === 'ENOENT') {
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112 const initial = getInitialTodos();
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113 await writeTodos(initial, userKeyword); // create the file immediately
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114 return initial;
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115 }
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116 throw e;
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117 }
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118 };
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119
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120 const writeTodos = async (todos: Todo[], userKeyword: string) => {
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121 const filePath = pathForKeyword(baseDir, userKeyword);
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122 await fs.mkdir(path.dirname(filePath), { recursive: true });
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123 const payload = encryptJSON(todos, userKeyword);
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124 await fs.writeFile(filePath, JSON.stringify(payload, null, 2), { encoding: 'utf8', mode: 0o600 });
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MrJuneJune <me@mrjunejune.com>
parents:
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125 };
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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126
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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127 router.get('/', async (req, res) => {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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128 try {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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129 const keyword = requireKeyword(req);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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130 const todos = await readTodos(keyword);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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131 res.json({ todos });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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132 } catch (err: any) {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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133 res.status(err?.status || 500).json({ error: err?.message || 'Internal error' });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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134 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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135 });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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136
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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137 router.post('/', async (req, res) => {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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138 try {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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139 const keyword = requireKeyword(req);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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140
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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141 const body = req.body?.newTodo;
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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142 if (!body || typeof body.value !== 'string' || typeof body.status !== 'number') {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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143 return res.status(400).json({ newTodo: null });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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144 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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145
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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146 const todos = await readTodos(keyword);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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147 const todo: Todo = {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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148 id: body.id ?? crypto.randomUUID(),
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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149 value: body.value,
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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150 status: body.status,
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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151 };
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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152 todos.push(todo);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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153
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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154 // Optional chaos test:
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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155 // await new Promise(r => setTimeout(r, 1000));
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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156 // if (Math.random() > 0.5) return res.status(400).json({ newTodo: null });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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157
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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158 await writeTodos(todos, keyword);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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159 res.status(200).json({ newTodo: todo, todos }); // keep your shape if you prefer
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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160 } catch (err: any) {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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161 res.status(err?.status || 500).json({ error: err?.message || 'Internal error' });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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162 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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163 });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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164
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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165 router.patch('/', async (req, res) => {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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166 try {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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167 const keyword = requireKeyword(req);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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168
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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169 const body = req.body;
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
170 if (!body || typeof body.todoId !== 'string' || typeof body.status !== 'number') {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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171 return res.status(400).json({ newTodo: null });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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172 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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173
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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174 const todos = (await readTodos(keyword)).map(
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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175 (todo) => todo.id === body.todoId ? {...todo, status: body.status } : todo);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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176
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
177 await writeTodos(todos, keyword);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
178 res.status(200).json({ todos });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
179 } catch (err: any) {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
180 res.status(err?.status || 500).json({ error: err?.message || 'Internal error' });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
181 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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182 });
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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183
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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184
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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185 return router;
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
186 }