CityCards_Customer_Flutter/lib/attraction_details/bloc/attraction_details_bloc.dart

import 'package:flutter_bloc/flutter_bloc.dart';
import 'attraction_details_event.dart';
import 'attraction_details_state.dart';
import '../repository/attraction_details_repository.dart';

class AttractionDetailsBloc
    extends Bloc<AttractionDetailsEvent, AttractionDetailsState> {
  final AttractionDetailsRepository repository;

  AttractionDetailsBloc({
    required this.repository,
  }) : super(AttractionDetailsInitial()) {
    on<FetchAttractionDetails>(_onFetchAttractionDetails);
    on<ToggleDescriptionExpanded>(_onToggleDescriptionExpanded);
    on<UpdateGalleryIndex>(_onUpdateGalleryIndex);
    on<UpdateFullScreenGalleryIndex>(_onUpdateFullScreenGalleryIndex);
  }

  void _onToggleDescriptionExpanded(
    ToggleDescriptionExpanded event,
    Emitter<AttractionDetailsState> emit,
  ) {
    if (state is AttractionDetailsLoaded) {
      final currentState = state as AttractionDetailsLoaded;
      emit(currentState.copyWith(isExpanded: !currentState.isExpanded));
    }
  }

  void _onUpdateGalleryIndex(
    UpdateGalleryIndex event,
    Emitter<AttractionDetailsState> emit,
  ) {
    if (state is AttractionDetailsLoaded) {
      final currentState = state as AttractionDetailsLoaded;
      emit(currentState.copyWith(galleryIndex: event.index));
    }
  }

  void _onUpdateFullScreenGalleryIndex(
    UpdateFullScreenGalleryIndex event,
    Emitter<AttractionDetailsState> emit,
  ) {
    if (state is AttractionDetailsLoaded) {
      final currentState = state as AttractionDetailsLoaded;
      emit(currentState.copyWith(fullScreenGalleryIndex: event.index));
    }
  }

  Future<void> _onFetchAttractionDetails(
      FetchAttractionDetails event,
      Emitter<AttractionDetailsState> emit,
      ) async {
    emit(AttractionDetailsLoading());

    try {
      final response = await repository.fetchAttractionDetails(
        attractionId: event.attractionId,
      );

      emit(
        AttractionDetailsLoaded(
          attractionDetails: response,
        ),
      );
    } catch (e) {
      emit(
        AttractionDetailsError(
          message: e.toString(),
        ),
      );
    }
  }
}