fetchNextPage method

Future<void> fetchNextPage({ required Future<List<T>> fetchApi(), bool checkDataIsSelected(T)?, })

Function to fetch next page data

If return list data is empty, indicator 'hasNextPage' will set false

Implementation

Future<void> fetchNextPage({
  /// This function is for passing data from response fetch data to list
  required Future<List<T>> Function() fetchApi,

  /// This function for check if data already selected before
  bool Function(T)? checkDataIsSelected,
}) async {
  if (!hasNextPage) {
    isLoadingNextPage = false;
    if (!_disposed) {
      notifyListeners();
      refreshStateParentWidget();
    }
  }
  if (isLoadingNextPage) return;
  isLoadingNextPage = true;
  if (!_disposed) {
    notifyListeners();
    refreshStateParentWidget();
  }
  try {
    final list = await fetchApi();
    isLoadingNextPage = false;
    if (!_disposed) {
      notifyListeners();
    }
    addItemList(list, checkDataIsSelected: checkDataIsSelected);
  } catch (e) {
    isLoadingNextPage = false;
    if (!_disposed) {
      notifyListeners();
      refreshStateParentWidget();
    }
  }
}