Flutter BLoC Pattern Implementation

Implement a Flutter BLoC pattern for [Feature Name] with proper separation of concerns.

Components

1. Events

• Define sealed classes extending [Feature]Event
• Create event classes for each user action

2. States

• Define sealed classes extending [Feature]State
• Include states:
  • [Feature]Loading
  • [Feature]Success
  • [Feature]Error

3. BLoC

• Create [Feature]Bloc extending Bloc<[Feature]Event, [Feature]State>
• Implement event handlers for each event type
• Business logic for state transitions

4. Repository Layer

• Separate data fetching logic
• Abstract API/database calls
• Return typed data models

5. BlocProvider Setup

• Provide BLoC in widget tree
• Proper dependency injection

6. UI Integration

• Use BlocBuilder for reactive UI updates
• Use BlocListener for side effects (navigation, snackbars)
• Combine with BlocConsumer when needed

7. Error Handling

• Proper error states
• Loading indicators
• User-friendly error messages

8. Testing

• Unit tests for the BLoC
• Test all state transitions
• Mock repository for testing

Requirements

• Complete code structure
• All necessary imports
• Best practices for scalable Flutter apps
• Clean architecture principles