Created Signup, login, logout, and verifyToken Routes in Backend

.gitignore

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-node_modules/
+node_modules
 .env

backend/config/config.js

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+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const config = {
+  port: process.env.PORT || 3000,
+  mongodbUri: process.env.MONGODB_URI,
+  jwtSecret: process.env.JWT_SECRET,
+};
+
+export default config;

backend/config/dbConnection.js

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+import mongoose from 'mongoose';
+import config from './config.js';
+
+const connectDB = async () => {
+  try {
+    await mongoose.connect(config.mongodbUri);
+    console.log('MongoDB connected successfully');
+  } catch (error) {
+    console.error('MongoDB connection failed:', error.message);
+    process.exit(1);
+  }
+};
+
+export default connectDB;

backend/controllers/authController.js

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+import User from '../models/User.js';
+import { hashPassword, comparePassword, generateToken, verifyToken, addCookie, getCookies, removeCookie } from '../utils/authFunctions.js';
+
+export const registerUser = async (req, res) => {
+  try {
+    const { name, email, phoneNumber, password } = req.body;
+
+    if (!name) {
+      return res.status(400).json({ error: 'Name is required' });
+    } else if (!email) {
+      return res.status(400).json({ error: 'Email is required' });
+    } else if (!phoneNumber) {
+      return res.status(400).json({ error: 'Phone number is required' });
+    } else if (!password) {
+      return res.status(400).json({ error: 'Password is required' });
+    }
+
+    const user = await User.findOne({ email });
+
+    if (user) {
+      return res.status(400).json({ error: 'User already exists' });
+    }
+
+    const hashedPassword = await hashPassword(password);
+
+    const newUser = new User({
+      name,
+      email,
+      phoneNumber,
+      password: hashedPassword
+    });
+
+    await newUser.save();
+
+    const token = await generateToken(newUser._id);
+
+    addCookie(res, 'token', token);
+
+    res.status(201).json({ message: 'User registered successfully', userId: newUser._id });
+  } catch (error) {
+    res.status(500).json({ error: error | 'Internal Server Error' });
+  }
+};
+
+export const loginUser = async (req, res) => {
+  try {
+    const { email, password } = req.body;
+
+    if (!email) {
+      return res.status(400).json({ error: 'Email is required' });
+    } else if (!password) {
+      return res.status(400).json({ error: 'Password is required' });
+    }
+
+    const user = await User.findOne({ email });
+
+    if (!user) {
+      return res.status(400).json({ error: 'User does not exist' });
+    }
+
+    const isPasswordValid = await comparePassword(password, user.password);
+
+    if (!isPasswordValid) {
+      return res.status(400).json({ error: 'Invalid password' });
+    }
+
+    const token = await generateToken(user._id);
+
+    addCookie(res, 'token', token);
+
+    res.status(200).json({ message: 'User logged in successfully', userId: user._id });
+  } catch (error) {
+    res.status(500).json({ error: error | 'Internal Server Error' });
+  }
+};
+
+export const logoutUser = async (req, res) => {
+  try {
+    removeCookie(res, 'token');
+
+    res.status(200).json({ message: 'User logged out successfully' });
+  } catch (error) {
+    res.status(500).json({ error: error | 'Internal Server Error' });
+  }
+}
+
+export const verifyUser = async (req, res) => {
+  try {
+    const token = getCookies(req, 'token');
+
+    if (!token) {
+      return res.status(400).json({ error: 'Invalid token' });
+    }
+
+    const decoded = await verifyToken(token);
+
+    if (!decoded) {
+      return res.status(400).json({ error: 'Invalid token' });
+    }
+
+    const user = await User.findById(decoded.id).select('-password');
+
+    if (!user) {
+      return res.status(400).json({ error: 'User does not exist' });
+    }
+
+    res.status(200).json({ message: 'User verified successfully', userId: user._id });
+  } catch (error) {
+    res.status(500).json({ error: error | 'Internal Server Error' });
+  }
+};

backend/index.js

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+import express from 'express';
+import cors from 'cors';
+import connectDB from './config/dbConnection.js';
+import cookieParser from 'cookie-parser';
+
+const app = express();
+
+const port = process.env.PORT || 3000;
+
+app.use(cors({
+  origin: 'http://localhost:5173',
+  methods: ['GET', 'POST'],
+  allowedHeaders: ['Content-Type'],
+  credentials: true
+})); // Enable CORS
+
+app.use(cookieParser()); // Parse cookies
+app.use(express.json()); // Parse incoming request bodies in a middleware before your handlers
+app.use(express.urlencoded({ extended: true })); // Parse URL-encoded bodies
+
+// Connect to MongoDB
+connectDB();
+
+// Routes
+import authRoutes from './routes/authRoutes.js';
+app.use('/auth', authRoutes);
+
+app.get('/', (req, res) => {
+  res.send('Working...');
+});
+// Start the server
+app.listen(port, () => {
+  console.log(`Server is running on http://localhost:${port}`);
+});

backend/models/User.js

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+import mongoose from 'mongoose';
+
+const Schema = mongoose.Schema;
+
+const userSchema = new Schema({
+  name: {
+    type: String,
+    required: true,
+    trim: true
+  },
+  email: {
+    type: String,
+    required: true,
+    unique: true,
+    trim: true
+  },
+  phoneNumber: {
+    type: String,
+    required: true,
+    unique: true,
+  },
+  password: {
+    type: String,
+    required: true
+  }
+}, {
+  timestamps: true
+});
+
+const User = mongoose.model('User', userSchema);
+
+export default User;