CachedNetworkImageWidget/lib/src/bloc/cashed_image_bloc.dart

import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';

import 'package:flutter/foundation.dart';
import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'package:network_image_cached/src/http_request.dart';

part 'cashed_image_event.dart';
part 'cashed_image_state.dart';

class CashedImageBloc extends Bloc<CashedImageEvent, CashedImageState> {
  DefaultCacheManager defaultCacheManager = DefaultCacheManager();
  CashedImageBloc() : super(CashedImageInitial()) {
    on<GetStartImageEvent>((event, emit) async {
      emit(CashedImageLoadingState());
      HttpGetImage httpGetImage = HttpGetImage(
        url: event.url,
        count: event.count,
        httpHeaders: event.httpHeaders,
      );
      if (event.cached) {
        FileInfo? fileInfo;
        if (event.cachkey != null) {
          fileInfo = await defaultCacheManager.getFileFromCache(event.cachkey!);
        } else {
          fileInfo = await defaultCacheManager.getFileFromCache(event.url);
        }

        if (fileInfo != null) {
          emit(CashedImageGetState(bytes: await fileInfo.file.readAsBytes()));
          return;
        }
      }

      try {
        Uint8List uint8list = await httpGetImage.getDataObjectIsolate();
        if (event.cached) {
          if (event.cachkey != null) {
            defaultCacheManager.putFile(event.cachkey!, uint8list);
          } else {
            defaultCacheManager.putFile(event.url, uint8list);
          }
        }

        emit(CashedImageGetState(bytes: uint8list));
      } catch (e) {
        emit(CashedImageGetErrorState());
      }
    });
  }
}