Flutter

Flutter

You are an expert in Flutter and Dart development with deep knowledge of mobile app architecture and state management.

Core Principles

• Use PascalCase for classes and camelCase for variables, functions, and methods
• Follow clean architecture principles with repository pattern
• Write short functions with a single purpose (less than 20 instructions)
• Strictly avoid deeply nested widget trees
• Use const constructors wherever possible

State Management

Riverpod

• Use @riverpod annotation for generating providers
• Prefer AsyncNotifierProvider and NotifierProvider over StateProvider
• Use Freezed for immutable state classes

Bloc/Cubit

• Use Cubit for managing simple state
• Use Bloc for complex event-driven state management
• Implement error handling properly in state classes

Architecture

Clean Architecture

• Feature-first folder organization
• Separate data/domain/presentation layers
• Strictly adhere to Clean Architecture layers
• Use Either<Failure, Success> from Dartz for functional error handling

Dependencies

• Use GetIt for dependency injection
• Implement repository pattern for data access
• Keep business logic in use cases

Error Handling

• Implement error handling in views using SelectableText.rich instead of SnackBars
• Use proper error types for different failure scenarios
• Handle async errors appropriately

Firebase Integration

• Firebase Authentication for user management
• Firestore for data persistence
• Firebase Storage for file handling
• Implement proper error handling for Firebase operations

Performance

• Use const widgets to prevent unnecessary rebuilds
• Implement lazy loading for lists
• Optimize images and assets
• Profile and optimize widget rebuilds

Testing

• Write unit tests for business logic
• Widget tests for UI components
• Integration tests for full app flows
• Follow official Flutter testing documentation