Initial commit - Rentall App

- Full-stack rental marketplace application
- React frontend with TypeScript
- Node.js/Express backend with JWT authentication
- Features: item listings, rental requests, calendar availability, user profiles

backend/middleware/auth.js

@@ -0,0 +1,27 @@
+const jwt = require('jsonwebtoken');
+const { User } = require('../models'); // Import from models/index.js to get models with associations
+
+const authenticateToken = async (req, res, next) => {
+  const authHeader = req.headers['authorization'];
+  const token = authHeader && authHeader.split(' ')[1];
+
+  if (!token) {
+    return res.status(401).json({ error: 'Access token required' });
+  }
+
+  try {
+    const decoded = jwt.verify(token, process.env.JWT_SECRET);
+    const user = await User.findByPk(decoded.userId);
+    
+    if (!user) {
+      return res.status(401).json({ error: 'User not found' });
+    }
+
+    req.user = user;
+    next();
+  } catch (error) {
+    return res.status(403).json({ error: 'Invalid or expired token' });
+  }
+};
+
+module.exports = { authenticateToken };