feat: implement MongoDB integration to user login and register.

server/config/db.js

@@ -0,0 +1,15 @@
+const mongoose=require('mongoose');
+require('dotenv').config();
+
+const connectDB=async()=>{
+    try{
+        await mongoose.connect(process.env.MONGO_URI
+        );
+        console.log("MongoDB connected");
+    }catch(err){
+        console.error("MongoDB connection failed:",err);
+        process.exit(1);
+    }
+};
+
+module.exports=connectDB;

server/controllers/authController.js

@@ -1,62 +1,67 @@
 const bcrypt = require("bcrypt");
 const jwt = require("jsonwebtoken");
+const User = require("../models/User"); 
 
-const users = [];
 const tokenBlacklist = [];
 
 const JWT_SECRET = process.env.JWT_SECRET || "your_jwt_secret";
 const JWT_EXPIRES_IN = "1h";
 
 exports.registerUser = async (req, res) => {
-    console.log("Register body:", req.body);
-    const { email, password } = req.body;
-    if (users.find(user => user.email === email)) {
-        return res.status(400).json({ message: "User already exists" });
+    try {
+        console.log("Register body:", req.body);
+        const { email, password } = req.body;
+
+        if (!email || !password) {
+            return res.status(400).json({ message: "Email and password are required" });
+        }
+        const existingUser = await User.findOne({ email });
+        if (existingUser) {
+            return res.status(400).json({ message: "User already exists" });
+        }
+
+        const hash = await bcrypt.hash(password, 10);
+
+        const newUser = new User({ email, password: hash });
+        await newUser.save();
+
+        return res.status(201).json({ message: "User registered successfully" });
+    } catch (err) {
+        console.error("Register error:", err);
+        return res.status(500).json({ message: "Server error" });
     }
-    const hash = await bcrypt.hash(password, 10);
-    users.push({ email, password: hash });
-    res.json({ message: "User registered" });
-}
+};
+
 exports.loginUser = async (req, res) => {
     try {
         console.log("Login body:", req.body);
-
         const { email, password } = req.body;
 
-        // Validate input
         if (!email || !password) {
             return res.status(400).json({ message: "Email and password are required" });
         }
-
-        // Find user
-        const user = users.find(u => u.email === email);
+        const user = await User.findOne({ email });
         if (!user) {
             return res.status(400).json({ message: "Invalid credentials" });
         }
-
-        // Compare password
         const match = await bcrypt.compare(password, user.password);
         if (!match) {
             return res.status(400).json({ message: "Invalid credentials" });
         }
+        const token = jwt.sign({ email: user.email }, JWT_SECRET, { expiresIn: JWT_EXPIRES_IN });
 
-        // Generate token
-        const token = jwt.sign({ email }, JWT_SECRET, { expiresIn: JWT_EXPIRES_IN });
-
-        // Send response
         return res.status(200).json({ token });
     } catch (err) {
         console.error("Login error:", err);
         return res.status(500).json({ message: "Server error" });
     }
 };
-
 exports.logoutUser = (req, res) => {
     const { token } = req.body;
+    if (!token) {
+        return res.status(400).json({ message: "Token required for logout" });
+    }
     tokenBlacklist.push(token);
-    res.json({ message: "Logged out" });
-}
-
-exports.getUsers =() => users;
-
-exports.getBlacklist =() => tokenBlacklist;
+    res.json({ message: "Logged out successfully" });
+};
+exports.getBlacklist = () => tokenBlacklist;

server/index.js

@@ -2,9 +2,13 @@ const express = require("express");
 const http = require("http");
 const { Server } = require("socket.io");
 const cors = require("cors");
+const connectDB = require("./config/db");
+require('dotenv').config();
 
 const app = express();
 const PORT = process.env.PORT || 3000;
+const URL=process.env.MONGO_URI||"mongodb://localhost:27017/collab-canvas";
+connectDB(URL);
 
 // Middleware
 app.use(express.json());

server/models/User.js

@@ -0,0 +1,13 @@
+const mongoose=require('mongoose');
+const userSchema=new mongoose.Schema({
+    email:{
+        type:String,
+    required:true,
+    unique:true,
+    },
+    password:{
+        type:String,
+        required:true,
+    },
+});
+module.exports=mongoose.model("User",userSchema);