v2.0 Study Materials App

Study Materials Store

A full-stack web application for selling and distributing study materials with secure password-protected downloads.

🌟 Features

• 🔐 User authentication (signup/login)
• 👑 Admin dashboard for managing content
• 🛒 Shopping cart functionality
• 💳 Checkout system with GST calculation
• 📄 Automatic PDF bill generation
• 🔑 Secure one-time password for downloads
• 📚 Subject-wise material organization
• 🔍 Search and filter capabilities
• 🌐 Easy server management with batch scripts

🛠️ Tech Stack

• Frontend: HTML, CSS, JavaScript
• Backend: Node.js, Express.js
• File Handling: Multer
• PDF Generation: PDFKit
• Security: Crypto for OTP generation

📦 Prerequisites

• Node.js (v14+ recommended)
• npm (comes with Node.js)
• Python (for serving frontend)
• Web browser with JavaScript enabled

⚡ Quick Start

1. Clone the repository

   git clone <repository-url>
   cd study-materials-app

2. Set up backend

   cd backend
   npm install
   npm start

   Server runs at: http://localhost:3000

3. Launch frontend
   Using VS Code:

   • Install "Live Server" extension
   • Right-click frontend/index.html
   • Select "Open with Live Server"

   Or using Python's HTTP server:

   cd frontend
   python -m http.server 5500

   Access at: http://localhost:5500

4. Automated Server Management

   • Start both servers using the batch script:

     start-servers.bat

   • Stop both servers using the batch script:

     stop-servers.bat

📁 Project Structure

study-materials-app/
├── backend/
│   ├── server.js          # Express server & API endpoints
│   ├── admin.json         # Admin credentials
│   ├── users.json         # User data
│   ├── files-config.json  # File mapping configuration 
│   ├── subjects.json      # Subject definitions
│   ├── bills/            # Generated PDF bills
│   └── files/            # Protected study materials
├── frontend/
│   ├── index.html        # Main store page
│   ├── admin.html        # Admin dashboard
│   ├── login.html        # User login
│   ├── signup.html       # User registration
│   ├── style.css         # Main styles
│   ├── signup.css        # Auth pages styles
│   ├── app.js           # Core application logic
│   └── items.js         # Study materials data
├── start-servers.bat     # Script to start servers
└── stop-servers.bat      # Script to stop servers

🔑 Authentication

User Login

• Email and password based
• Purchase history tracking
• Password change functionality

Admin Login

• Default credentials:
  • Email: admin@study.com
  • Password: qwerty
• Access to user management
• Material upload capabilities

💼 Admin Features

1. User Management

   • View all users
   • Track user purchases
   • View purchase history

2. Content Management

   • Add/remove study materials
   • Set prices and descriptions
   • Upload protected PDF files
   • Manage subject categories

🛍️ Shopping Features

1. Cart System

   • Add/remove items
   • Real-time price calculation
   • GST (18%) included

2. Checkout Process

   • Automatic bill generation
   • Unique download passwords
   • Purchase history tracking

3. Download Security

   • One-time passwords
   • Timed download links
   • Secure file access

🔐 Security Features

• Password-protected downloads
• One-time use passwords
• Secure file storage
• Token-based downloads
• Admin access control

🛠️ Configuration

Admin Settings

Edit backend/admin.json:

{
  "email": "admin@study.com",
  "password": "your-secure-password"
}

File Storage

Protected files location: backend/files

• Supported format: All(.pdf recommended)
• Auto-configured on upload

📝 Development Notes

1. Adding New Features

   • Backend: Add routes in server.js
   • Frontend: Extend app.js functionality
   • Styles: Modify appropriate CSS files

2. Security Considerations

   • Use HTTPS in production
   • Implement proper password hashing
   • Add rate limiting for downloads

🚀 Production Deployment

1. Backend Preparation

   • Set up proper database
   • Configure environment variables
   • Implement proper security measures

2. Frontend Optimization

   • Minify JavaScript and CSS
   • Optimize images
   • Enable caching

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Commit your changes
4. Push to the branch
5. Open a pull request

📄 License

This project is licensed under the ISC License

Full Changelog: v1.0...v2.0