flutter_bloc_pattern

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flutter_bloc_pattern

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:zap: Base class, bloc provider and rxdart stream builder for BLoC pattern in flutter: https://pub.dev/packages/flutter_bloc_pattern

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# flutter_bloc_pattern

Base class, BLoC provider and `rxdart` builder for BLoC pattern in Flutter.

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## Getting Started

### 1. Add this to your package's pubspec.yaml file

```yaml
dependencies:
  flutter_bloc_pattern: <latest_version>
```

### 2. Implements BaseBloc

```dart
import 'package:disposebag/disposebag.dart';
import 'package:flutter_bloc_pattern/flutter_bloc_pattern.dart';
import 'package:rxdart_ext/rxdart_ext.dart';

class MyBloc implements BaseBloc {
  StateStream<String> get stream;

@override
  void dispose() {}
}
```

### 3. Consume BLoC

```dart
 final bloc = BlocProvider.of<MyBloc>(context);
 return RxStreamBuilder<String>(
  stream: bloc.stream,
  builder: (context, state) {
    return ...;
  },
);
```

## Example: A port of the standard "Counter Button" example from Flutter

### 1. File `counter_bloc.dart`

```dart
import 'dart:async';

import 'package:disposebag/disposebag.dart';
import 'package:flutter_bloc_pattern/flutter_bloc_pattern.dart';
import 'package:rxdart_ext/rxdart_ext.dart';

class CounterBloc extends DisposeCallbackBaseBloc {
  /// Inputs
  final VoidAction increment;

/// Outputs
  final StateStream<int> state;

CounterBloc._({
    required VoidAction dispose,
    required this.increment,
    required this.state,
  }) : super(dispose);

factory CounterBloc() {
    final incrementController = StreamController<void>();

final state$ = incrementController.stream
        .scan<int>((acc, _, __) => acc + 1, 0)
        .publishState(0);

return CounterBloc._(
      dispose: DisposeBag([incrementController, state$.connect()]).dispose,
      increment: incrementController.addNull,
      state: state$,
    );
  }
}
```

### 2. File `main.dart`

```dart
import 'package:example/bloc.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc_pattern/flutter_bloc_pattern.dart';

class TextCounter1 extends StatelessWidget {
  const TextCounter1({super.key});

@override
  Widget build(BuildContext context) {
    final bloc = BlocProvider.of<CounterBloc>(context);

return RxStreamBuilder<int>(
      stream: bloc.state,
      builder: (context, state) {
        return Text(
          'COUNTER 1: $state',
          style: Theme.of(context).textTheme.titleLarge,
        );
      },
    );
  }
}

class IncrementButton extends StatelessWidget {
  const IncrementButton({super.key});

@override
  Widget build(BuildContext context) {
    final bloc = context.bloc<CounterBloc>();

return FloatingActionButton(
      onPressed: bloc.increment,
      tooltip: 'Increment',
      child: const Icon(Icons.add),
    );
  }
}
```

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