reactive_notifier_replay 2.16.1

Undo/Redo functionality extension for ReactiveNotifier - Track state history and enable time-travel debugging for your application state.

2.16.1

Version Sync & Documentation

Updates

• Synchronized version with reactive_notifier ecosystem (2.16.1)
• Updated Dart SDK requirement to ^3.10.0
• Updated dependency to reactive_notifier ^2.16.1
• Fixed GitHub username references in documentation

Documentation

• Updated README examples and version references
• Enhanced CLAUDE.md with complete API patterns

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2.16.0

Initial Release - Undo/Redo for ReactiveNotifier

New Features

ReplayReactiveNotifier

Wrapper around ReactiveNotifier with history tracking:

mixin CounterService {
  static final counter = ReplayReactiveNotifier<int>(
    create: () => 0,
    historyLimit: 50,
    onCanUndoChanged: (canUndo) => print('Can undo: $canUndo'),
    onCanRedoChanged: (canRedo) => print('Can redo: $canRedo'),
  );

  static void increment() => counter.updateState(counter.notifier + 1);
  static void undo() => counter.undo();
  static void redo() => counter.redo();
}

ReplayViewModel

ViewModel extension with automatic state history:

class DocumentViewModel extends ReplayViewModel<DocumentState> {
  DocumentViewModel() : super(
    DocumentState.empty(),
    historyLimit: 100,
    debounceHistory: Duration(milliseconds: 500),
  );

  void updateContent(String content) {
    transformState((state) => state.copyWith(content: content));
  }
}

ReplayAsyncViewModelImpl

AsyncViewModelImpl extension that tracks only success states:

class TodoListViewModel extends ReplayAsyncViewModelImpl<List<Todo>> {
  TodoListViewModel() : super(AsyncState.initial(), historyLimit: 20);

  @override
  Future<List<Todo>> init() async => await repository.loadTodos();

  void deleteTodo(String id) {
    transformDataState((todos) => todos?.where((t) => t.id != id).toList());
    // User can undo() to restore deleted todo!
  }
}

ReplayHistoryMixin

Shared mixin for custom implementations with configurable options:

• historyLimit: Maximum states to keep (default: 100)
• debounceHistory: Group rapid changes (ideal for text editors)
• onCanUndoChanged: Callback for UI updates
• onCanRedoChanged: Callback for UI updates

Core Capabilities

• Undo/Redo Navigation: Navigate through state history with undo() and redo()
• Jump to History: Navigate directly to any point with jumpToHistory(index)
• Peek History: View historical states without changing current with peekHistory(index)
• Clear History: Reset history with clearHistory() or clearHistory(specificState)
• History Properties: canUndo, canRedo, historyLength, currentHistoryIndex

Integration

• Fully compatible with ReactiveNotifier 2.16.0+
• Uses onStateChanged/onAsyncStateChanged hooks automatically
• Works with all ReactiveNotifier builders (ReactiveBuilder, ReactiveViewModelBuilder, ReactiveAsyncBuilder)
• Follows ReactiveNotifier patterns and conventions

Dependencies

• Requires reactive_notifier: ^2.16.0
• Dart SDK: ^3.5.4
• Flutter SDK: >=1.17.0