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server.js
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server.js
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const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const User = require('./models/User');
const app = express();
// Middleware
app.use(bodyParser.json());
// MongoDB connection
mongoose.connect('mongodb+srv://sucilbhandari11:Uqu57h2qjz@cluster0.h5i6ukf.mongodb.net/?retryWrites=true&w=majority&appName=Cluster0', { useNewUrlParser: true, useUnifiedTopology: true })
.then(() => console.log('MongoDB connected'))
.catch(err => console.log('MongoDB connection error:', err));
// Routes
app.post('/signup', async (req, res) => {
const { username, password } = req.body;
try {
// Check if user exists
const userExists = await User.findOne({ username });
if (userExists) {
return res.status(400).json({ message: 'User already exists' });
}
// Hash password
const salt = await bcrypt.genSalt(10);
const hashedPassword = await bcrypt.hash(password, salt);
// Create new user
const newUser = new User({ username, password: hashedPassword });
await newUser.save();
res.status(201).json({ message: 'User created successfully' });
} catch (error) {
console.error('Signup error:', error);
res.status(500).json({ message: 'Server error' });
}
});
app.post('/login', async (req, res) => {
const { username, password } = req.body;
try {
// Check if user exists
const user = await User.findOne({ username });
if (!user) {
return res.status(400).json({ message: 'Invalid credentials' });
}
// Validate password
const isMatch = await bcrypt.compare(password, user.password);
if (!isMatch) {
return res.status(400).json({ message: 'Invalid credentials' });
}
// Generate JWT
const token = jwt.sign({ userId: user._id }, 'your_jwt_secret', { expiresIn: '1h' });
res.json({ token, userId: user._id });
} catch (error) {
console.error('Login error:', error);
res.status(500).json({ message: 'Server error' });
}
});
// Start server
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => console.log(`Server running on port ${PORT}`));