Backend

Backend/Server.js

@@ -0,0 +1,28 @@
+const mongoose= require('mongoose');
+const express= require('express');
+const bodyParser= require('body-parser');
+const mongoose= require('mongoose');
+
+const authRoutes= require('./routes/auth');
+const scanRoutes= require('./routes/scan');
+
+const app=express();
+app.use(corse());
+app.use(bodyParser.json());
+
+app.use('/api/auth', authRoutes);
+app.use('/api/scan', scanRoutes);
+
+mongoose.connect('mongodb://localhost:27017/digital-mess-card', {  //Mongodb connection
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+});
+
+app.get('/',(req,res)=>{
+    res.send('Digital MESS Card');      //Route
+});
+
+const PORT= 5000;
+app.listen(PORT, () => {
+    console.log(`Server running on http://localhost:${PORT}`);
+})

Backend/middleware/auth.js

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+const jwt= require('jsonwebtoken');
+
+const authenticate= (req,res,next) => {                               //Authenticate access
+    const token=req.header('Authorization');
+    if (!token) return res.status(401).send('Access Denied');
+
+    try{
+        const decoded= jwt.verify(token, 'secret_key');
+        req.userId= decoded.userId;
+        next();
+    } catch (err) {
+        res.status(400).send('Invalid token');
+    }
+};
+
+module.exports= { authenticate };

Backend/models/Scan.js

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+const mongoose= require('mongoose');
+const scanSchema =new mongoose.Schema({                                     //Scan date update in db
+    userId: {   type: String, enum: ['lunch', 'snck'], required: true },
+    date :{  type: Date, default: Date.now},
+});
+
+module.exports= mongoose.model('Scan', scanSchema);

Backend/models/User.js

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+const mongoose= require('mongoose');
+
+const userSchema= new mongoose.schema({                            //login details connected to db
+    username:{ type: String, required: true, unique: true },
+    password:{ type: String, required: true, match:/^[a-zA-Z0-9]+$/,
+    }
+});
+module.exports= mongoose.model('User', userSchema);

Backend/routes/auth.js

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+const express= require('express');
+const bcrypt= require('bcryptjs');
+const jwt= require('jsonwebtoken');
+const User= require('../models/User');
+
+const router= express.Router();                                        //to register new user
+router.post('/register', async(req, res) => {
+    const { username, password}=req.body;
+    const hashedPassword=await bcrypt.hash(password, 10);
+    const User= new User({username, password: hashedPassword });
+    await username.save();
+    res.status(201).send('User registered');
+});
+
+router.post('/login', async (req, res) => {                            //to check whether the login details are valid
+    const { username, password } = req.body;
+    const user= await User.findOne({ username });
+    if (user && await bcrypt.compare(password, user.password)) {
+        const token= jwt.sign({ userId: user._id }, 'secret_key');
+        res.json({ token });
+    } else {
+        res.status(400).send('Invalid credentials');
+    }
+});
+
+module.exports= router;

Backend/routes/scan.js

@@ -0,0 +1,29 @@
+const express= require('express');
+const Scan= require('../models/Scan');
+const {authenticate}=require('../middleware/auth');
+
+const router=express.Router();
+router.post('/scan',authenticate, async(req,res)=> {                            //to get info about user and the current time
+    const {type}= req.body;
+    const userId=req.userId;
+    const now= new Date();
+    const hours= now.getHours();
+    const minutes=now.getMinutes();
+
+    if(type==='lunch' && !(hours>=11 && minutes>=30 && hours<14)){             //to check whether scanning of lunch time is valid
+        return res.status(400).send('Lunch sacnning is only allwed between 11:30 AM and 2:00 PM');
+    }
+
+    if(type=== 'snack' && !(hours>=15 && minutes>=30 && hours<17)){            //to check whether scanning of snack time is valid
+        return res.status(400).send('Snack scanning is only allowed between 3:30 PM and 5:00 PM');
+    }
+    const existingScan=await Scan.findone({ userId, type, date: { $gte: new Date().setHours(0,0,0,0)}});
+    if (existingScan){                                                         //to check whether a scanning already occured in the given time
+        return res.status(400).send('Already scanned today');
+    }
+    const scan= new scan({userId, type});
+    await scan.save();                                                          //to save current scan
+    res.send('Scan successful');
+});
+
+module.exports= router;

README.md

@@ -2,13 +2,13 @@
 
 
 ## Basic Details
-### Team Name: [Name]
+### Team Name: NOX
 
 
 ### Team Members
-- Member 1: [Name] - [College]
-- Member 2: [Name] - [College]
-- Member 3: [Name] - [College]
+- Member 1: Anagha TR - SCMS School of engineering and technology
+- Member 2: Anaya Wilson - SCMS School of engineering and technology
+- Member 3: Aneeja J - SCMS School of engineering and technology
 
 ### Hosted Project Link
 [mention your project hosted project link here]