add feature for users to create and store recipes

backend/routes/recipes.js

@@ -1,7 +1,26 @@
 const express = require('express');
 const router = express.Router();
+const jwt = require('jsonwebtoken');
 const Recipe = require('../models/Recipe');
 
+// Middleware to authenticate JWT token
+function authenticateToken(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' });
+  }
+  
+  jwt.verify(token, process.env.JWT_SECRET, (err, decoded) => {
+    if (err) {
+      return res.status(403).json({ error: 'Invalid or expired token' });
+    }
+    req.userId = decoded.userId;
+    next();
+  });
+}
+
 // Get all recipes
 router.get('/', async (req, res) => {
   try {
@@ -37,10 +56,13 @@ router.get('/:id', async (req, res) => {
   }
 });
 
-// Create new recipe
-router.post('/', async (req, res) => {
+// Create new recipe (protected route)
+router.post('/', authenticateToken, async (req, res) => {
   try {
-    const recipe = new Recipe(req.body);
+    const recipe = new Recipe({
+      ...req.body,
+      createdBy: req.userId // Add user ID to track who created the recipe
+    });
     await recipe.save();
     res.status(201).json(recipe);
   } catch (error) {