Implement car reservation schedule management system

Co-authored-by: pdf114514 <57948770+pdf114514@users.noreply.github.com>
Agent-Logs-Url: https://github.com/pdf114514/CarReservation/sessions/1d8c6b05-0e8d-4484-a2d8-8d427dfad9cb

backend/package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "node server.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "better-sqlite3": "^12.8.0",
+    "cors": "^2.8.6",
+    "express": "^5.2.1",
+    "express-rate-limit": "^8.3.1"
+  }
+}

backend/server.js

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+const express = require('express');
+const cors = require('cors');
+const rateLimit = require('express-rate-limit');
+const Database = require('better-sqlite3');
+const path = require('path');
+
+const app = express();
+const PORT = process.env.PORT || 3001;
+
+app.use(cors());
+app.use(express.json());
+
+// Apply rate limiting to all API routes
+const apiLimiter = rateLimit({
+  windowMs: 15 * 60 * 1000, // 15 minutes
+  max: 300, // limit each IP to 300 requests per windowMs
+  standardHeaders: true,
+  legacyHeaders: false,
+  message: { error: 'リクエストが多すぎます。しばらくしてから再試行してください。' },
+});
+app.use('/api', apiLimiter);
+
+const dbPath = path.join(__dirname, 'data.db');
+const db = new Database(dbPath);
+
+// Initialize database schema
+db.exec(`
+  CREATE TABLE IF NOT EXISTS cars (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL,
+    description TEXT DEFAULT ''
+  );
+
+  CREATE TABLE IF NOT EXISTS reservations (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    car_id INTEGER NOT NULL,
+    start_date TEXT NOT NULL,
+    end_date TEXT NOT NULL,
+    customer_name TEXT DEFAULT '',
+    notes TEXT DEFAULT '',
+    FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
+  );
+`);
+
+// Seed some initial cars if none exist
+const carCount = db.prepare('SELECT COUNT(*) as cnt FROM cars').get();
+if (carCount.cnt === 0) {
+  const insertCar = db.prepare('INSERT INTO cars (name, description) VALUES (?, ?)');
+  insertCar.run('代車 A', '');
+  insertCar.run('代車 B', '');
+  insertCar.run('代車 C', '');
+}
+
+// --- Cars API ---
+app.get('/api/cars', (req, res) => {
+  const cars = db.prepare('SELECT * FROM cars ORDER BY id').all();
+  res.json(cars);
+});
+
+app.post('/api/cars', (req, res) => {
+  const { name, description = '' } = req.body;
+  if (!name || !name.trim()) {
+    return res.status(400).json({ error: '車名は必須です' });
+  }
+  const result = db.prepare('INSERT INTO cars (name, description) VALUES (?, ?)').run(name.trim(), description);
+  const car = db.prepare('SELECT * FROM cars WHERE id = ?').get(result.lastInsertRowid);
+  res.status(201).json(car);
+});
+
+app.put('/api/cars/:id', (req, res) => {
+  const { name, description } = req.body;
+  if (!name || !name.trim()) {
+    return res.status(400).json({ error: '車名は必須です' });
+  }
+  const result = db.prepare('UPDATE cars SET name = ?, description = ? WHERE id = ?').run(name.trim(), description ?? '', req.params.id);
+  if (result.changes === 0) {
+    return res.status(404).json({ error: '車が見つかりません' });
+  }
+  const car = db.prepare('SELECT * FROM cars WHERE id = ?').get(req.params.id);
+  res.json(car);
+});
+
+app.delete('/api/cars/:id', (req, res) => {
+  const result = db.prepare('DELETE FROM cars WHERE id = ?').run(req.params.id);
+  if (result.changes === 0) {
+    return res.status(404).json({ error: '車が見つかりません' });
+  }
+  res.json({ success: true });
+});
+
+// --- Reservations API ---
+app.get('/api/reservations', (req, res) => {
+  const reservations = db.prepare('SELECT * FROM reservations ORDER BY start_date').all();
+  res.json(reservations);
+});
+
+app.post('/api/reservations', (req, res) => {
+  const { car_id, start_date, end_date, customer_name = '', notes = '' } = req.body;
+  if (!car_id || !start_date || !end_date) {
+    return res.status(400).json({ error: 'car_id, start_date, end_date は必須です' });
+  }
+  if (start_date > end_date) {
+    return res.status(400).json({ error: '開始日は終了日以前である必要があります' });
+  }
+  const result = db.prepare(
+    'INSERT INTO reservations (car_id, start_date, end_date, customer_name, notes) VALUES (?, ?, ?, ?, ?)'
+  ).run(car_id, start_date, end_date, customer_name, notes);
+  const reservation = db.prepare('SELECT * FROM reservations WHERE id = ?').get(result.lastInsertRowid);
+  res.status(201).json(reservation);
+});
+
+app.put('/api/reservations/:id', (req, res) => {
+  const { car_id, start_date, end_date, customer_name, notes } = req.body;
+  if (!car_id || !start_date || !end_date) {
+    return res.status(400).json({ error: 'car_id, start_date, end_date は必須です' });
+  }
+  if (start_date > end_date) {
+    return res.status(400).json({ error: '開始日は終了日以前である必要があります' });
+  }
+  const result = db.prepare(
+    'UPDATE reservations SET car_id = ?, start_date = ?, end_date = ?, customer_name = ?, notes = ? WHERE id = ?'
+  ).run(car_id, start_date, end_date, customer_name ?? '', notes ?? '', req.params.id);
+  if (result.changes === 0) {
+    return res.status(404).json({ error: '予約が見つかりません' });
+  }
+  const reservation = db.prepare('SELECT * FROM reservations WHERE id = ?').get(req.params.id);
+  res.json(reservation);
+});
+
+app.delete('/api/reservations/:id', (req, res) => {
+  const result = db.prepare('DELETE FROM reservations WHERE id = ?').run(req.params.id);
+  if (result.changes === 0) {
+    return res.status(404).json({ error: '予約が見つかりません' });
+  }
+  res.json({ success: true });
+});
+
+app.listen(PORT, () => {
+  console.log(`Server running on http://localhost:${PORT}`);
+});