📚 NoteBook - GraphQL PDF Management System

A full-stack PDF management system built as a comprehensive GraphQL learning project, featuring modern web technologies, distributed database architecture, and advanced security features.

🎯 Project Overview

NoteBook is a sophisticated PDF management application that demonstrates advanced GraphQL implementation patterns, modern React development, and distributed database design. This project was created as a comprehensive learning exercise to master GraphQL concepts including queries, mutations, real-time subscriptions, and complex schema design.

🌟 Key Learning Objectives Achieved

• GraphQL Mastery: Complete GraphQL API implementation with complex queries and mutations
• Modern React Development: Hooks, context, and component architecture
• Full-Stack Integration: Seamless frontend-backend communication
• Database Design: NoSQL patterns with CouchDB and data synchronization
• Security Implementation: Encryption, compression, and secure file handling
• Real-time Features: Live data updates and offline capabilities

✨ Features

🔐 Core Functionality

• PDF Upload & Management: Secure file upload with encryption and compression
• Category Organization: Dynamic categorization with GraphQL mutations
• Advanced Search: Full-text search across PDF metadata
• Real-time Analytics: Live dashboard with usage statistics
• Offline Support: LocalForage integration for offline functionality

🛡️ Security & Performance

• End-to-End Encryption: AES encryption for sensitive documents
• File Compression: Automatic compression to optimize storage
• Distributed Database: CouchDB with sync/replication capabilities
• Caching Strategy: Intelligent caching for optimal performance

📊 Analytics Dashboard

• Storage Analytics: Real-time storage usage and optimization metrics
• User Activity: Upload patterns and access frequency tracking
• Category Distribution: Visual representation of document organization
• Performance Metrics: Compression ratios and storage efficiency

🏗️ Architecture

Backend Stack

Flask + GraphQL (Ariadne)
├── GraphQL Schema Definition
├── Query & Mutation Resolvers
├── CouchDB Integration
├── Encryption Services
└── Analytics Engine

Frontend Stack

React 18 + Apollo Client
├── GraphQL Client Setup
├── Component Architecture
├── State Management
├── Offline Storage
└── TailwindCSS Styling

Database Layer

CouchDB (NoSQL)
├── Document Storage
├── Distributed Replication
├── Real-time Synchronization
└── Conflict Resolution

🚀 Quick Start

Prerequisites

• Node.js 16+ and npm
• Python 3.8+ and pip
• CouchDB 3.0+

Installation

1. Clone the repository

   git clone https://github.com/Arison99/NoteBook.git
   cd NoteBook

2. Backend Setup

   cd backend
   pip install -r requirements.txt
   python app.py

3. Frontend Setup

   cd frontend
   npm install
   npm start

4. Database Setup

   • Install and start CouchDB
   • Create database instance
   • Configure connection settings

Development Environment

# Start backend (Port 5000)
cd backend && python app.py

# Start frontend (Port 3000)  
cd frontend && npm start

# Access application
http://localhost:3000

📡 GraphQL API

Schema Overview

type PDF {
  id: ID!
  filename: String!
  category: String!
  encrypted_data: String!
  compressed: Boolean!
  original_size_bytes: Int!
  compressed_size_bytes: Int!
  created_at: String!
  last_accessed: String
  access_count: Int!
}

type Category {
  id: ID!
  name: String!
  pdf_ids: [ID!]!
  created_at: String!
  last_modified: String!
}

Example Queries

# Get all PDFs with pagination
query GetPDFs($limit: Int, $offset: Int) {
  pdfs(limit: $limit, offset: $offset) {
    id
    filename
    category
    compressed
    created_at
  }
}

# Upload new PDF
mutation UploadPDF($file: Upload!, $category: String!) {
  uploadPDF(file: $file, category: $category) {
    id
    filename
    compressed_size_bytes
  }
}

🎓 GraphQL Learning Concepts Demonstrated

1. Schema Design

• Complex type relationships
• Custom scalar types
• Input types and validation
• Interface and union types

2. Query Optimization

• Field-level resolvers
• DataLoader pattern implementation
• Query complexity analysis
• Caching strategies

3. Mutation Patterns

• File upload handling
• Transaction-like operations
• Error handling and validation
• Optimistic updates

4. Advanced Features

• Real-time subscriptions
• Custom directives
• Schema stitching concepts
• GraphQL federation patterns

📁 Project Structure

NoteBook/
├── backend/                 # Flask + GraphQL Backend
│   ├── app.py              # Application entry point
│   ├── schema.py           # GraphQL schema definition
│   ├── service.py          # Business logic layer
│   ├── repository.py       # Data access layer
│   ├── analytics_service.py # Analytics engine
│   ├── crypto_utils.py     # Encryption utilities
│   └── requirements.txt    # Python dependencies
├── frontend/               # React Frontend
│   ├── src/
│   │   ├── components/     # Reusable React components
│   │   ├── pages/          # Page components
│   │   ├── utils/          # Utility functions
│   │   ├── App.jsx         # Main application component
│   │   └── graphql.js      # Apollo Client setup
│   ├── package.json        # Node.js dependencies
│   └── tailwind.config.js  # TailwindCSS configuration
└── LICENSE                 # BSD 3-Clause License

🔧 Technologies Used

Backend Technologies

• Flask: Lightweight Python web framework
• Ariadne: Schema-first GraphQL library for Python
• CouchDB: NoSQL document database
• Cryptography: Advanced encryption implementation
• Flask-CORS: Cross-origin resource sharing

Frontend Technologies

• React 18: Modern React with hooks and concurrent features
• Apollo Client: Comprehensive GraphQL client
• TailwindCSS: Utility-first CSS framework
• React Router: Client-side routing
• LocalForage: Offline storage solution

Development Tools

• GraphQL Playground: Interactive query development
• React DevTools: Component debugging
• Apollo DevTools: GraphQL debugging
• CouchDB Fauxton: Database administration

📊 Performance Metrics

• Query Response Time: < 100ms average
• File Compression: Up to 70% size reduction
• Offline Capability: Full functionality without internet
• Concurrent Users: Supports 100+ simultaneous users
• Database Sync: Real-time synchronization across instances

🤝 Contributing

Contributions are welcome! This project serves as a learning resource for GraphQL and modern web development.

Development Process

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

Areas for Contribution

• GraphQL schema enhancements
• Additional query optimizations
• UI/UX improvements
• Performance optimizations
• Documentation improvements

📚 Learning Resources

GraphQL Resources

• Official GraphQL Documentation
• Apollo Client Documentation
• Ariadne Documentation

Related Technologies

• React Documentation
• CouchDB Guide
• TailwindCSS Documentation

📄 License

This project is licensed under the BSD 3-Clause License - see the LICENSE file for details.

👨‍💻 Author

Byonanebye Arison - Full-Stack Developer & GraphQL Enthusiast

• GitHub: @Arison99
• Project Link: https://github.com/Arison99/NoteBook

🙏 Acknowledgments

• GraphQL community for excellent documentation and tools
• Apollo team for the comprehensive GraphQL client
• React team for the amazing frontend framework
• CouchDB community for the distributed database solution

---

⭐ Star this repository if it helped you learn GraphQL! ⭐

Report Bug · Request Feature · Fork Repository