[Store Provider] #dart #store #provider #appstate #redux

login_app_action.dart

class AuthCheckAuthenticatedAction{
  @override
  String toString() {
    return 'AuthCheckAuthenticatedAction{name: AuthCheckAuthenticatedAction}';
  }
}

login_app_middleware.dart

List<Middleware<LoginAppState>> createLoginMiddleware(
    [QRRepository repository]) {
  final performAuthenticationCheck = _performAuthenticationCheck(repository);

  return [
    TypedMiddleware<LoginAppState, AuthCheckAuthenticatedAction>(
        performAuthenticationCheck),
    NavigationMiddleware<LoginAppState>()
  ];
}

Middleware<LoginAppState> _performAuthenticationCheck(QRRepository repository) {
  return (Store<LoginAppState> store, action, NextDispatcher next) async {
    AuthCheckAuthenticatedAction requestAction = action;
    next(action);
  };
}

login_app_reducer.dart

final loginAppReducer = combineReducers<LoginAppState>([
  TypedReducer<LoginAppState, MoveToScreen>(_moveToScreenState),
]);

LoginAppState _moveToScreenState(LoginAppState appState, MoveToScreen action) {
  return LoginAppState(screen: action.screen);
}

login_app_state.dart

@immutable
class LoginAppState {
  final Screen screen;

  LoginAppState({this.screen});
}

store_provider.dart

final Store<LoginAppState> store = new Store<LoginAppState>(
    loginAppReducer,
    initialState: LoginAppState(screen: Screen.Login),
    middleware: createLoginMiddleware(...),
  );

@override
Widget build(BuildContext context) {
   return StoreProvider<LoginAppState>(
     store: store,
     child: MaterialApp(...),
   );
}