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Initial commit: PriceGhost price tracking application
Full-stack application for tracking product prices: - Backend: Node.js + Express + TypeScript - Frontend: React + Vite + TypeScript - Database: PostgreSQL - Price scraping with Cheerio - JWT authentication - Background price checking with node-cron - Price history charts with Recharts - Docker support with docker-compose Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
clucraft
commit
10660e5626
44 changed files with 3662 additions and 0 deletions
93
backend/src/routes/auth.ts
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93
backend/src/routes/auth.ts
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@ -0,0 +1,93 @@
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import { Router, Request, Response } from 'express';
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import bcrypt from 'bcrypt';
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import { userQueries } from '../models';
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import { generateToken } from '../middleware/auth';
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const router = Router();
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// Register new user
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router.post('/register', async (req: Request, res: Response) => {
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try {
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const { email, password } = req.body;
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if (!email || !password) {
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res.status(400).json({ error: 'Email and password are required' });
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return;
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}
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if (password.length < 8) {
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res.status(400).json({ error: 'Password must be at least 8 characters' });
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return;
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}
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const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
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if (!emailRegex.test(email)) {
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res.status(400).json({ error: 'Invalid email format' });
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return;
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}
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const existingUser = await userQueries.findByEmail(email);
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if (existingUser) {
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res.status(409).json({ error: 'Email already registered' });
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return;
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}
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const saltRounds = 12;
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const passwordHash = await bcrypt.hash(password, saltRounds);
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const user = await userQueries.create(email, passwordHash);
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const token = generateToken(user.id);
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res.status(201).json({
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message: 'User registered successfully',
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token,
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user: {
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id: user.id,
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email: user.email,
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},
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});
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} catch (error) {
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console.error('Registration error:', error);
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res.status(500).json({ error: 'Registration failed' });
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}
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});
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// Login
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router.post('/login', async (req: Request, res: Response) => {
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try {
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const { email, password } = req.body;
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if (!email || !password) {
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res.status(400).json({ error: 'Email and password are required' });
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return;
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}
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const user = await userQueries.findByEmail(email);
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if (!user) {
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res.status(401).json({ error: 'Invalid email or password' });
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return;
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}
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const isValidPassword = await bcrypt.compare(password, user.password_hash);
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if (!isValidPassword) {
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res.status(401).json({ error: 'Invalid email or password' });
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return;
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}
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const token = generateToken(user.id);
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res.json({
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message: 'Login successful',
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token,
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user: {
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id: user.id,
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email: user.email,
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},
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});
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} catch (error) {
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console.error('Login error:', error);
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res.status(500).json({ error: 'Login failed' });
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}
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});
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export default router;
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93
backend/src/routes/prices.ts
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93
backend/src/routes/prices.ts
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import { Router, Response } from 'express';
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import { AuthRequest, authMiddleware } from '../middleware/auth';
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import { productQueries, priceHistoryQueries } from '../models';
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import { scrapePrice } from '../services/scraper';
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const router = Router();
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// All routes require authentication
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router.use(authMiddleware);
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// Get price history for a product
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router.get('/:productId/prices', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const productId = parseInt(req.params.productId, 10);
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if (isNaN(productId)) {
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res.status(400).json({ error: 'Invalid product ID' });
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return;
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}
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// Verify product belongs to user
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const product = await productQueries.findById(productId, userId);
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if (!product) {
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res.status(404).json({ error: 'Product not found' });
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return;
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}
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// Get optional days filter from query
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const days = req.query.days ? parseInt(req.query.days as string, 10) : undefined;
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const priceHistory = await priceHistoryQueries.findByProductId(
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productId,
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days
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);
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res.json({
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product,
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prices: priceHistory,
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});
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} catch (error) {
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console.error('Error fetching price history:', error);
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res.status(500).json({ error: 'Failed to fetch price history' });
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}
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});
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// Force immediate price refresh
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router.post('/:productId/refresh', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const productId = parseInt(req.params.productId, 10);
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if (isNaN(productId)) {
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res.status(400).json({ error: 'Invalid product ID' });
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return;
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}
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// Verify product belongs to user
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const product = await productQueries.findById(productId, userId);
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if (!product) {
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res.status(404).json({ error: 'Product not found' });
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return;
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}
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// Scrape new price
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const priceData = await scrapePrice(product.url);
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if (!priceData) {
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res.status(400).json({ error: 'Could not extract price from URL' });
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return;
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}
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// Record new price
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const newPrice = await priceHistoryQueries.create(
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productId,
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priceData.price,
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priceData.currency
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);
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// Update last_checked timestamp
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await productQueries.updateLastChecked(productId);
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res.json({
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message: 'Price refreshed successfully',
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price: newPrice,
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});
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} catch (error) {
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console.error('Error refreshing price:', error);
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res.status(500).json({ error: 'Failed to refresh price' });
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}
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});
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export default router;
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172
backend/src/routes/products.ts
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172
backend/src/routes/products.ts
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import { Router, Response } from 'express';
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import { AuthRequest, authMiddleware } from '../middleware/auth';
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import { productQueries, priceHistoryQueries } from '../models';
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import { scrapeProduct } from '../services/scraper';
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const router = Router();
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// All routes require authentication
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router.use(authMiddleware);
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// Get all products for the authenticated user
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router.get('/', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const products = await productQueries.findByUserId(userId);
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res.json(products);
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} catch (error) {
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console.error('Error fetching products:', error);
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res.status(500).json({ error: 'Failed to fetch products' });
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}
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});
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// Add a new product to track
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router.post('/', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const { url, refresh_interval } = req.body;
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if (!url) {
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res.status(400).json({ error: 'URL is required' });
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return;
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}
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// Validate URL
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try {
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new URL(url);
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} catch {
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res.status(400).json({ error: 'Invalid URL format' });
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return;
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}
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// Scrape product info
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const scrapedData = await scrapeProduct(url);
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if (!scrapedData.price) {
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res.status(400).json({
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error: 'Could not extract price from the provided URL',
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});
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return;
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}
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// Create product
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const product = await productQueries.create(
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userId,
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url,
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scrapedData.name,
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scrapedData.imageUrl,
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refresh_interval || 3600
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);
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// Record initial price
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await priceHistoryQueries.create(
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product.id,
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scrapedData.price.price,
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scrapedData.price.currency
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);
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// Update last_checked timestamp
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await productQueries.updateLastChecked(product.id);
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// Fetch the product with the price
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const productWithPrice = await productQueries.findById(product.id, userId);
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res.status(201).json(productWithPrice);
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} catch (error) {
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// Handle unique constraint violation
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if (
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error instanceof Error &&
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error.message.includes('duplicate key value')
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) {
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res.status(409).json({ error: 'You are already tracking this product' });
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return;
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}
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console.error('Error adding product:', error);
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res.status(500).json({ error: 'Failed to add product' });
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}
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});
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// Get a specific product
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router.get('/:id', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const productId = parseInt(req.params.id, 10);
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if (isNaN(productId)) {
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res.status(400).json({ error: 'Invalid product ID' });
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return;
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}
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const product = await productQueries.findById(productId, userId);
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if (!product) {
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res.status(404).json({ error: 'Product not found' });
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return;
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}
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// Get price stats
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const stats = await priceHistoryQueries.getStats(productId);
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res.json({ ...product, stats });
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} catch (error) {
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console.error('Error fetching product:', error);
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res.status(500).json({ error: 'Failed to fetch product' });
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}
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});
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// Update product settings
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router.put('/:id', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const productId = parseInt(req.params.id, 10);
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if (isNaN(productId)) {
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res.status(400).json({ error: 'Invalid product ID' });
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return;
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}
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const { name, refresh_interval } = req.body;
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const product = await productQueries.update(productId, userId, {
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name,
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refresh_interval,
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});
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if (!product) {
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res.status(404).json({ error: 'Product not found' });
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return;
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}
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res.json(product);
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} catch (error) {
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console.error('Error updating product:', error);
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res.status(500).json({ error: 'Failed to update product' });
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}
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});
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// Delete a product
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router.delete('/:id', async (req: AuthRequest, res: Response) => {
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try {
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const userId = req.userId!;
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const productId = parseInt(req.params.id, 10);
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if (isNaN(productId)) {
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res.status(400).json({ error: 'Invalid product ID' });
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return;
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}
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const deleted = await productQueries.delete(productId, userId);
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if (!deleted) {
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res.status(404).json({ error: 'Product not found' });
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return;
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}
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res.json({ message: 'Product deleted successfully' });
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} catch (error) {
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console.error('Error deleting product:', error);
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res.status(500).json({ error: 'Failed to delete product' });
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}
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});
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export default router;
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