registering and logging in modification

src/controllers/userController.js

@@ -3,23 +3,48 @@ const User = require('../models/user');
 exports.register = async (req, res) => {
     try {
         const { username, email, password } = req.body;
+
+        // Validate input
+        if (!username || !email || !password) {
+            return res.status(400).json({ message: 'All fields are required' });
+        }
+
+        // Check if user already exists
+        const existingUser = await User.findOne({ email });
+        if (existingUser) {
+            return res.status(400).json({ message: 'Email already registered' });
+        }
+
+        // Create and save new user
         const newUser = new User({ username, email, password });
         await newUser.save();
+
         res.status(201).json({ message: 'User registered successfully', user: newUser });
     } catch (error) {
-        res.status(400).json({ message: 'Error registering user', error });
+        console.error(error); // Log the error for debugging
+        res.status(500).json({ message: 'Error registering user', error });
     }
 };
 
 exports.login = async (req, res) => {
     try {
         const { email, password } = req.body;
+
+        // Validate input
+        if (!email || !password) {
+            return res.status(400).json({ message: 'Email and password are required' });
+        }
+
+        // Find the user
         const user = await User.findOne({ email });
         if (!user || !(await user.comparePassword(password))) {
             return res.status(401).json({ message: 'Invalid email or password' });
         }
+
         res.status(200).json({ message: 'Login successful', user });
     } catch (error) {
-        res.status(400).json({ message: 'Error logging in', error });
+        console.error(error); // Log the error for debugging
+        res.status(500).json({ message: 'Error logging in', error });
     }
 };
+