TechNews Flutter App

TechNews is a modern Flutter application built with Clean Architecture and BLoC pattern that delivers the latest technology news. The app features a robust architecture with proper separation of concerns, comprehensive error handling, and enterprise-grade code organization.

🏗️ Architecture

This project follows Clean Architecture principles with the BLoC (Business Logic Component) pattern for state management, ensuring:

• Separation of Concerns: Clear boundaries between data, business logic, and presentation layers
• Testability: Interface-based design enables comprehensive unit and integration testing
• Maintainability: Modular structure makes the codebase easy to understand and modify
• Scalability: Architecture supports feature growth and team expansion
• Error Handling: Robust exception handling with custom error types

📁 Project Structure

lib/
├── main.dart                           # Application entry point with DI setup
├── core/                              # 🔧 Core functionality layer
│   ├── constants/                     # Application constants
│   │   ├── api_constants.dart         # API endpoints and configuration
│   │   └── app_constants.dart         # App-wide settings and constants
│   ├── errors/                        # Custom error handling
│   │   └── exceptions.dart            # Custom exception hierarchy
│   └── utils/                         # Utility functions
│       ├── date_utils.dart            # Date formatting and manipulation
│       └── network_utils.dart         # Network connectivity utilities
├── data/                              # 📊 Data layer
│   ├── datasources/                   # Data source abstractions
│   │   ├── news_data_source.dart      # Data source interfaces
│   │   ├── news_remote_data_source.dart # API implementation
│   │   └── news_local_data_source.dart  # Local storage implementation
│   └── repositories/                  # Repository implementations
│       └── news_repository_impl.dart  # News repository with DI
├── models/                            # 📋 Data models
│   └── news_article.dart             # News article model
├── bloc/                              # 🧠 Business logic layer (BLoC)
│   ├── navigation/                    # Navigation state management
│   │   ├── navigation_bloc.dart
│   │   ├── navigation_event.dart
│   │   └── navigation_state.dart
│   ├── news/                          # General tech news BLoC
│   │   ├── news_bloc.dart
│   │   ├── news_event.dart
│   │   └── news_state.dart
│   ├── ai_news/                       # AI-specific news BLoC
│   │   ├── ai_news_bloc.dart
│   │   ├── ai_news_event.dart
│   │   └── ai_news_state.dart
│   ├── saved_news/                    # Bookmarked news BLoC
│   │   ├── saved_news_bloc.dart
│   │   ├── saved_news_event.dart
│   │   └── saved_news_state.dart
│   └── news_detail/                   # Article detail BLoC
│       ├── news_detail_bloc.dart
│       ├── news_detail_event.dart
│       └── news_detail_state.dart
└── screens/                           # 🎨 Presentation layer
    ├── news_screen.dart               # Main news feed screen
    ├── ai_news_screen.dart            # AI news screen
    ├── saved_news_screen.dart         # Bookmarked articles screen
    └── news_detail_screen.dart        # Article detail screen

🚀 Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

🛠️ Technology Stack

• Flutter: Cross-platform mobile development framework
• Dart: Programming language
• BLoC Pattern: State management and business logic
• Clean Architecture: Architectural design pattern
• HTTP: API communication
• SharedPreferences: Local data persistence
• Equatable: Value equality and immutability

Prerequisites

Ensure you have the following installed on your machine:

• Flutter (version 3.0.0 or later)
• Dart (version 3.0.0 or later)
• Android Studio (for Android development)
• Xcode (for iOS development, macOS only)
• Visual Studio Code (optional, but recommended)

Installation

1. Clone the repository:

   git clone https://github.com/codewithkd77/technews-flutter.git
   cd technews-flutter

2. Install dependencies:

   flutter pub get

3. Configure API:

   • Open the lib/core/constants/api_constants.dart file.
   • Replace the placeholder API URL and API key with your own:

   class ApiConstants {
     static const String baseUrl = 'YOUR_API_BASE_URL';
     static const String aiNewsApiUrl = 'YOUR_AI_NEWS_API_URL';
     static const String aiApiKey = 'YOUR_AI_API_KEY';
   }

4. Run the project:

   • Android:
     • Ensure you have an Android emulator running or a physical device connected.

     flutter run

   • iOS:
     • Ensure you have an iOS simulator running or a physical device connected.

     flutter run

📦 Building for Production

Building the APK (Android)

To build the APK file for Android:

flutter build apk --release

The APK file will be generated in the build/app/outputs/flutter-apk/ directory.

Building the iOS App

To build the iOS app:

flutter build ios --release

Note: You need a macOS machine with Xcode installed to build the iOS app.

🏛️ Architecture Overview

Clean Architecture Layers

1. Core Layer (lib/core/)

   • Constants: API endpoints, app configuration
   • Errors: Custom exception hierarchy for robust error handling
   • Utils: Shared utility functions and helpers

2. Data Layer (lib/data/)

   • Data Sources: Abstract interfaces and concrete implementations
     • NewsRemoteDataSource: API communication
     • NewsLocalDataSource: Local storage operations
   • Repositories: Implementation of repository interfaces with dependency injection

3. Domain Layer (Implicit)

   • Models: Data entities and business objects
   • Repository Interfaces: Abstract contracts for data operations

4. Presentation Layer (lib/bloc/ + lib/screens/)

   • BLoC: Business logic and state management
   • Screens: UI components and user interactions

Key Architectural Benefits

• 🔄 Dependency Inversion: High-level modules don't depend on low-level modules
• 🧪 Testability: Each layer can be tested independently
• 🔧 Maintainability: Clear separation of concerns
• 📈 Scalability: Easy to add new features and modify existing ones
• 🔒 Error Handling: Comprehensive exception handling at each layer

📱 Screens Overview

🏠 News Screen (news_screen.dart)

• Main tech news feed
• Pull-to-refresh functionality
• Navigation to article details
• Search functionality

🤖 AI News Screen (ai_news_screen.dart)

• Dedicated AI and machine learning news
• Similar functionality to main news feed
• AI-specific content filtering

🔖 Saved News Screen (saved_news_screen.dart)

• Bookmarked articles management
• Local storage integration
• Remove from bookmarks functionality

📖 News Detail Screen (news_detail_screen.dart)

• Full article content display
• Bookmark/unbookmark functionality
• Share article feature
• Related articles suggestions

🔧 Configuration

API Configuration

Update lib/core/constants/api_constants.dart:

class ApiConstants {
  static const String baseUrl = 'https://your-api-url.com';
  static const String newsEndpoint = '/api/news';
  static const String aiNewsApiUrl = 'https://your-ai-api-url.com';
}

🤝 Contributing

We welcome contributions! Please follow these steps:

1. Fork the repository
2. Create a feature branch: git checkout -b feature/amazing-feature
3. Follow the architecture: Maintain Clean Architecture principles
4. Write tests: Include unit tests for new features
5. Follow code style: Use consistent formatting and naming
6. Commit changes: git commit -m 'Add amazing feature'
7. Push to branch: git push origin feature/amazing-feature
8. Open a Pull Request

Code Style Guidelines

• Follow Dart Style Guide
• Use meaningful variable and function names
• Add comprehensive documentation
• Maintain consistent file structure
• Include proper error handling

🔮 Future Enhancements

• Dark mode support
• Push notifications for breaking news
• Offline reading mode
• Social sharing integration
• News categories and filtering
• User preferences and customization
• Analytics integration

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

👨‍💻 Author

KULDEEPSINH - codewithkd77

🙏 Acknowledgments

• Flutter team for the amazing framework
• BLoC pattern developers for state management solution
• Clean Architecture principles by Robert C. Martin
• Open source community for continuous inspiration

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Built with ❤️ using Flutter and Clean Architecture

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