Add the feature to Set Up Database for Course Information (#19)

config.json

@@ -0,0 +1,5 @@
+{
+    "mongodb_uri": "YOUR_MONGODB_URI_HERE",
+    "secret_key": "YOUR_SECRET_KEY_HERE"
+  }
+

package.json

@@ -2,6 +2,7 @@
   "dependencies": {
     "ejs": "^3.1.9",
     "express": "^4.18.2",
-    "mongodb": "^6.1.0"
+    "mongodb": "^6.1.0",
+    "mongoose": "^7.5.3"
   }
 }

src/app.js

@@ -1,11 +1,59 @@
-const express = require("express");
+const express = require('express');
+const mongoose = require('mongoose');
+const fs = require('fs');
 
 const app = express();
 
-app.get("/", (req, res) => {
-  res.send("Hello World!");
+// Read configuration from config.json
+let config;
+try {
+  const configData = fs.readFileSync('config.json');
+  config = JSON.parse(configData);
+} catch (err) {
+  console.error('Error reading config file:', err);
+  process.exit(1);
+}
+
+// Connect to MongoDB using the configuration
+mongoose.connect(config.mongodb_uri, {
+  useNewUrlParser: true,
+  useUnifiedTopology: true,
+})
+  .then(() => {
+    console.log('Connected to MongoDB');
+    // Start your application logic here
+  })
+  .catch((err) => {
+    console.error('Error connecting to MongoDB:', err);
+    process.exit(1);
+  });
+
+// Simulated user data (replace with actual user data from your database)
+const users = [
+  { username: 'user1', password: 'password1' },
+  { username: 'user2', password: 'password2' },
+];
+
+// Define your login function here
+function login(username, password) {
+  const user = users.find((u) => u.username === username && u.password === password);
+  return !!user; // Return true if the user exists, false otherwise
+}
+
+// Example usage of the login function
+app.get('/login', (req, res) => {
+  const username = req.query.username;
+  const password = req.query.password;
+
+  if (login(username, password)) {
+    res.send('Login successful');
+  } else {
+    res.status(401).send('Login failed');
+  }
 });
 
-app.listen(3000, () => {
-  console.log("Server is up on port 3000");
+// Start the server
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => {
+  console.log(`Server is running on port ${PORT}`);
 });

src/db/courseDB.js

@@ -0,0 +1,30 @@
+// Import the mongoose library
+const mongoose = require('mongoose');
+
+// Define a schema for the course
+const courseSchema = new mongoose.Schema({
+  title: {
+    type: String,
+    required: true,
+    trim: true, // Remove whitespace from the beginning and end of the string
+  },
+  description: {
+    type: String,
+    required: true,
+  },
+  duration: {
+    type: Number,
+    required: true,
+  },
+  difficulty: {
+    type: String,
+    required: true, 
+  },
+  // Add more fields as needed
+});
+
+// Create a model using the schema
+const Course = mongoose.model('Course', courseSchema);
+
+// Export the Course model
+module.exports = Course;