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System Architecture

🏗️ High-Level Architecture

┌─────────────────────────────────────────────────────────────────┐
│                      Client Application                         │
│  ┌─────────────┐  ┌─────────────┐  ┌───────────────────────┐  │
│  │     UI      │  │   State     │  │       Services        │  │
│  │ Components  │◄─┤  Management │◄─┤  (API, Auth, Storage)  │  │
│  └─────────────┘  └─────────────┘  └───────────┬───────────┘  │
└─────────────────────────────────────────────────┼──────────────┘
                                                 │
┌────────────────────────────────────────────────▼──────────────┐
│                      Backend Services                          │
│  ┌─────────────┐  ┌─────────────┐  ┌───────────────────────┐  │
│  │  Firebase   │  │  Google AI  │  │   Document Processing  │  │
│  │  Services   │  │   Services  │  │      (Tesseract,      │  │
│  └─────────────┘  └─────────────┘  │     PDF.js, Mammoth)   │  │
│                                    └───────────────────────┘  │
└───────────────────────────────────────────────────────────────┘

🧩 Component Architecture

1. Presentation Layer

  • Components: Reusable UI elements (buttons, forms, modals)
  • Pages: Top-level route components
  • Layout: Application shell and navigation

2. Application Layer

  • Services: Business logic and API calls
  • Hooks: Custom React hooks for reusable logic
  • Context: Global state management

3. Data Layer

  • Firestore: NoSQL database for application data
  • Firebase Storage: File storage for documents
  • Local Storage: Client-side caching

🔄 Data Flow

  1. User Actions:

    • User interacts with UI components
    • Actions trigger state updates or API calls

  2. State Management:

    • Local component state for UI-specific state
    • Context API for global application state
    • Optimistic updates for better UX

  3. API Communication:

    • Axios for REST API calls
    • Firebase SDK for real-time updates
    • Error handling and retry logic

  4. Data Processing:

    • Document parsing and analysis
    • AI/ML model inference
    • Data transformation and normalization

🔒 Security Architecture

Authentication

  • Firebase Authentication
  • JWT-based session management
  • Role-based access control (RBAC)

Data Protection

  • Field-level security rules
  • Data encryption at rest and in transit
  • Regular security audits

API Security

  • Rate limiting
  • Input validation
  • CORS configuration

📡 API Architecture

RESTful Principles

  • Resource-based endpoints
  • Standard HTTP methods (GET, POST, PUT, DELETE)
  • Consistent response formats
  • Error handling standards

Endpoint Structure

/api
  /v1
    /auth         # Authentication endpoints
    /documents    # Document management
    /analysis     # AI analysis endpoints
    /users        # User management

🏗️ Frontend Architecture

Component Structure

src/
  components/     # Reusable UI components
  pages/          # Page components
  hooks/          # Custom React hooks
  context/        # React context providers
  services/       # API and business logic
  utils/          # Utility functions
  assets/         # Static assets
  styles/         # Global styles

State Management

  • Local State: useState for component-specific state
  • Global State: useContext for app-wide state
  • Server State: React Query for server data

🚀 Performance Optimization

Code Splitting

  • Route-based code splitting
  • Dynamic imports for heavy components
  • Lazy loading of non-critical assets

Caching Strategies

  • Service worker for offline support
  • Browser caching for static assets
  • Optimistic UI updates

Bundle Optimization

  • Tree shaking
  • Code minification
  • Asset compression

🔄 CI/CD Pipeline

Development Workflow

  1. Feature branches from main
  2. Automated testing on PRs
  3. Code review process
  4. Automated deployment to staging

Deployment

  • Automated testing
  • Canary releases
  • Rollback strategy
  • Monitoring and alerts

📊 Monitoring & Analytics

Application Monitoring

  • Error tracking
  • Performance metrics
  • User session recording

Business Analytics

  • User engagement
  • Feature usage
  • Conversion tracking

🔄 Integration Points

Third-Party Services

  • Payment processors
  • Email/SMS services
  • Document signing
  • Cloud storage

Webhooks

  • Real-time notifications
  • External system updates
  • Automated workflows

📚 Documentation

API Documentation

  • OpenAPI/Swagger
  • Example requests/responses
  • Authentication details

Developer Guides

  • Setup instructions
  • Architecture decisions
  • Contribution guidelines
  • Code style guide

🛠️ Development Environment

Local Development

  • Hot module replacement
  • Environment variables
  • Mock API server

Testing

  • Unit tests
  • Integration tests
  • E2E tests
  • Visual regression tests

🚀 Production Environment

Infrastructure

  • CDN for static assets
  • Load balancing
  • Auto-scaling

High Availability

  • Multi-region deployment
  • Database replication
  • Disaster recovery plan