S4 Bucket Mobile App (Flutter)

Enterprise-grade mobile application for S4 Bucket file management system, built with Flutter for cross-platform development.

🚀 Features

• Cross-Platform: iOS and Android support with single codebase
• Enterprise Architecture: Clean architecture with scalable design
• Offline-First: Robust offline capabilities with local storage
• Security: JWT authentication, biometric auth, secure storage
• Modern UI: Material Design 3 with customizable themes
• Performance: Optimized for mobile networks and battery life

🏗️ Architecture

This app follows Clean Architecture principles with Domain-Driven Design:

lib/
├── core/               # Core utilities and constants
├── data/               # Data layer (repositories, datasources)
├── domain/             # Business logic layer (entities, usecases)
├── presentation/       # UI layer (pages, widgets, providers)
└── shared/             # Shared components and utilities

📋 Prerequisites

• Flutter SDK: 3.10.0 or higher
• Dart SDK: 3.0.0 or higher
• Android Studio or VS Code with Flutter extensions
• Git for version control

🛠️ Setup Instructions

1. Clone the Repository

git clone <repository-url>
cd s4-bucket-mobile

2. Install Dependencies

flutter pub get

3. Environment Configuration

Copy the example environment file and customize it:

cp env.example .env

Edit .env with your configuration:

• Set ENVIRONMENT to dev, staging, or production
• Configure API endpoints
• Set feature flags

4. Run Code Generation

flutter packages pub run build_runner build --delete-conflicting-outputs

5. Run the App

# Development
flutter run

# Release build
flutter run --release

🔧 Development

Project Structure

• lib/core/: App configuration, constants, themes, utilities
• lib/data/: API services, local storage, repositories
• lib/domain/: Business entities, use cases, repository interfaces
• lib/presentation/: UI components, pages, state management
• lib/shared/: Common widgets and utilities

State Management

This app uses Riverpod for state management:

• Providers: App-wide configuration and services
• StateNotifier: Complex state logic
• FutureProvider: Async operations
• StreamProvider: Real-time data

Code Generation

The app uses several code generation tools:

• Hive: Local database models
• Retrofit: API service generation
• JSON Serializable: Data model serialization
• Riverpod Generator: Provider code generation

Testing

# Unit tests
flutter test

# Integration tests
flutter test integration_test/

# Test coverage
flutter test --coverage

📱 Build & Deploy

Android

# Build APK
flutter build apk --release

# Build App Bundle
flutter build appbundle --release

iOS

# Build iOS
flutter build ios --release

🔒 Security Features

• JWT Authentication: Secure token-based auth
• Biometric Authentication: Touch ID/Face ID support
• Secure Storage: Encrypted local storage
• Network Security: HTTPS enforcement
• Certificate Pinning: Production security

📊 Monitoring & Analytics

• Crash Reporting: Automatic crash detection
• Performance Monitoring: App performance metrics
• User Analytics: Feature usage tracking
• Error Tracking: Comprehensive error logging

🤝 Contributing

Development Workflow

1. Feature Branch: Create feature branch from main
2. Code Review: Submit pull request for review
3. Testing: Ensure all tests pass
4. Documentation: Update relevant documentation
5. Merge: Merge after approval

Code Standards

• Dart Style: Follow official Dart style guide
• Documentation: Document all public APIs
• Testing: Maintain 80%+ test coverage
• Linting: Use Flutter lints and custom rules

Commit Convention

type(scope): description

Examples:
feat(auth): add biometric authentication
fix(api): resolve file upload timeout issue
docs(readme): update setup instructions

📚 Dependencies

Core Dependencies

• Flutter: Latest stable version
• Riverpod: State management
• GoRouter: Navigation
• Dio: HTTP client
• Hive: Local database
• SQLite: Relational storage

UI Dependencies

• Material Design 3: Modern UI components
• Shimmer: Loading animations
• Lottie: Rich animations
• Cached Network Image: Image caching

Security Dependencies

• Flutter Secure Storage: Secure data storage
• Local Auth: Biometric authentication
• Permission Handler: Runtime permissions

🐛 Troubleshooting

Common Issues

1. Dependencies not found: Run flutter pub get
2. Code generation errors: Run flutter packages pub run build_runner build
3. Build failures: Check Flutter and Dart versions
4. Runtime errors: Verify environment configuration

Debug Mode

Enable debug logging in .env:

ENABLE_DEBUG_LOGGING=true
ENABLE_VERBOSE_LOGGING=true

📞 Support

• Documentation: Check inline code documentation
• Issues: Report bugs via GitHub issues
• Team: Contact development team for assistance

📄 License

This project is proprietary software. All rights reserved.

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Built with ❤️ using Flutter for enterprise-grade mobile development