Course Selling Platform - Backend API

A robust REST API backend for an online course-selling platform built with Node.js, Express, and MongoDB. This application handles user authentication, course management, and purchase workflows.

Features

• User Authentication & Authorization

  • JWT-based authentication
  • Secure password hashing
  • Role-based access control (Admin/User)

• Course Management

  • Create, read, update, and delete courses
  • Course categorization and filtering
  • Course purchase functionality

• User Management

  • User registration and login
  • Profile management
  • Purchase history tracking

• Security

  • Password encryption using bcrypt
  • JWT token-based authentication
  • Protected routes with middleware
  • Input validation and sanitization

Tech Stack

• Runtime: Node.js
• Framework: Express.js
• Database: MongoDB
• Authentication: JWT (JSON Web Tokens)
• Password Hashing: bcrypt

Project Structure

Course-Selling-App/
├── middleware/          # Authentication and validation middleware
├── routes/             # API route handlers
├── db.js              # Database connection and schemas
├── index.js           # Main application entry point
├── package.json       # Project dependencies
└── .gitignore        # Git ignore rules

🔧 Installation

1. Clone the repository

   git clone https://github.com/AdityaJRDev/Course-Selling-App.git
   cd Course-Selling-App

2. Install dependencies

   npm install

3. Set up environment variables

   Create a .env file in the root directory:

   PORT=3000
   MONGODB_URI=your_mongodb_connection_string
   JWT_SECRET=your_jwt_secret_key

4. Start the server

   npm start

   The server will start on http://localhost:3000

📚 API Endpoints

Authentication Routes

User Routes

• POST /api/user/signup - Register a new user
• POST /api/user/login - User login
• GET /api/user/courses - Get all available courses
• POST /api/user/courses/:courseId - Purchase a course
• GET /api/user/purchasedCourses - Get purchased courses

Admin Routes

• POST /api/admin/signup - Register a new admin
• POST /api/admin/login - Admin login
• POST /api/admin/courses - Create a new course
• PUT /api/admin/courses/:courseId - Update a course
• GET /api/admin/courses - Get all courses (admin view)

🔐 Authentication

This API uses JWT (JSON Web Tokens) for authentication. Include the token in the Authorization header for protected routes:

Authorization: Bearer <your_jwt_token>

💾 Database Schema

User Schema

{
  username: String,
  password: String (hashed),
  purchasedCourses: [CourseId]
}

Admin Schema

{
  username: String,
  password: String (hashed)
}

Course Schema

{
  title: String,
  description: String,
  price: Number,
  imageLink: String,
  published: Boolean
}

Testing

You can test the API endpoints using tools like:

• Postman
• Thunder Client
• Insomnia

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the project
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Author

Aditya JR

• GitHub: @AdityaJRDev

• Built as a learning project to understand backend development

• Inspired by modern e-learning platforms

---

⭐ If you found this project helpful, please consider giving it a star!