feat: Add website visitor counter (issue#63)

Backend/config/db.js

@@ -1,18 +1,25 @@
 const mongoose = require("mongoose");
-require("dotenv").config();
 
 const connectDB = async () => {
   try {
-    await mongoose.connect(process.env.MONGO_URI, {
-      useNewUrlParser: true,
-      useUnifiedTopology: true,
+    // We are adding a 'tls' option here.
+    // This is a common workaround for the 'tlsv1 alert internal error'
+    // that can happen on some networks or computers.
+    const conn = await mongoose.connect(process.env.MONGO_URI, {
+      tls: true,
+      tlsAllowInvalidCertificates: true, // Use this for development only
     });
-    console.log("MongoDB Connected");
+
+    console.log(`MongoDB Connected: ${conn.connection.host}`);
   } catch (error) {
-    console.error(error);
-    process.exit(1);
+    console.error(`Error connecting to MongoDB: ${error.message}`);
+    process.exit(1); // Exit process with failure
   }
 };
 
+// The original file likely calls the function to connect immediately.
+// We will keep that structure.
 connectDB();
-module.exports = mongoose;
+
+// We don't strictly need to export, but it's good practice.
+module.exports = connectDB;

Backend/controllers/visitorController.js

@@ -0,0 +1,16 @@
+const Visitor = require('../models/Visitor');
+
+// Increments visitor count and returns it
+exports.getAndIncrementVisitorCount = async (req, res) => {
+    try {
+        const stats = await Visitor.findOneAndUpdate(
+            { name: 'site_stats' },   // Filter to find the document
+            { $inc: { count: 1 } },   // Increment the 'count' field by 1
+            { new: true, upsert: true } // Options: return the updated doc, and create it if it doesn't exist
+        );
+        res.status(200).json({ count: stats.count });
+    } catch (error) {
+        console.error('Error updating visitor count:', error);
+        res.status(500).json({ message: 'Server error' });
+    }
+};

Backend/index.js

@@ -5,25 +5,33 @@ require("dotenv").config();
 const bodyParser = require("body-parser");
 require("./config/db");
 
+// 1. Import the new visitor routes
+const visitorRoutes = require('./routes/visitorRoutes');
+
 const app = express();
-app.use(bodyParser.json({ limit: "50mb" }));  // Increase JSON request size limit
-app.use(bodyParser.urlencoded({ limit: "50mb", extended: true })); 
+app.use(bodyParser.json({ limit: "50mb" })); // Increase JSON request size limit
+app.use(bodyParser.urlencoded({ limit: "50mb", extended: true }));
 app.use(cors());
 app.use(express.json());
 
 
 app.use("/api", require("./routes/certificateRoutes"));
 app.use("/api/images", require("./routes/imageRoutes"));
 app.use("/auth", require("./routes/authRoutes"));
+
+// 2. Add the new visitor route to the application
+app.use("/api/visitors", visitorRoutes);
+
 //404 handler
 app.use((req, res, next) => {
   res.status(404).json({ message: "Not Found" });
 });
+
 //Global error handler
 app.use((err,req,res,next)=>{
     console.error(err.stack);
     res.status(500).json({ message: "Internal Server Error" });
 });
 
 const PORT = process.env.PORT || 5000;
-app.listen(PORT, () => console.log(`Server running on port ${PORT}`));
+app.listen(PORT, () => console.log(`Server running on port ${PORT}`));

Backend/models/Visitor.js

@@ -0,0 +1,15 @@
+const mongoose = require('mongoose');
+
+const VisitorSchema = new mongoose.Schema({
+    name: {
+        type: String,
+        required: true,
+        default: 'site_stats'
+    },
+    count: {
+        type: Number,
+        default: 0
+    }
+});
+
+module.exports = mongoose.model('Visitor', VisitorSchema);

Backend/routes/visitorRoutes.js

@@ -0,0 +1,8 @@
+const express = require('express');
+const router = express.Router();
+const { getAndIncrementVisitorCount } = require('../controllers/visitorController');
+
+// GET /api/visitors/count
+router.get('/count', getAndIncrementVisitorCount);
+
+module.exports = router;