applyMiddleware<T> function

Reducer<T> applyMiddleware<T>(Reducer<T> reducer, List<ReduxMiddleware<T>> middlewares)

Apply middleware to a reducer

Implementation

Reducer<T> applyMiddleware<T>(
  Reducer<T> reducer,
  List<ReduxMiddleware<T>> middlewares,
) {
  return (T state, Action action) {
    // Create a chain of middleware
    void Function(Action) next = (Action action) {
      reducer(state, action);
    };

    for (var i = middlewares.length - 1; i >= 0; i--) {
      final middleware = middlewares[i];
      final currentNext = next;
      next = (Action action) {
        middleware(
          ReduxStore(state, reducer),
          action,
          currentNext,
        );
      };
    }

    next(action);
    return state;
  };
}