mobile-app/lib/presentation/screens/location_unit/bloc/location_bloc.dart

import 'dart:async';

import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:farm_tpf/custom_model/LocationUnit.dart';
import 'package:farm_tpf/data/repository/repository.dart';
import 'package:farm_tpf/utils/const_common.dart';
import 'package:meta/meta.dart';

part 'location_event.dart';
part 'location_state.dart';

class LocationBloc extends Bloc<LocationEvent, LocationState> {
  final Repository repository;
  LocationBloc({@required this.repository}) : super(LocationInitial());

  @override
  Stream<LocationState> mapEventToState(
    LocationEvent event,
  ) async* {
    if (event is DataFetched) {
      try {
        final response = await repository.getLocationUnits(
            locationType: event.locationType, filterId: event.filterId);
        List<LocationUnit> locations = response.map((location) {
          if (location.id == event.selectedId) {
            location.isSelected = true;
          }
          return location;
        }).toList();
        yield LocationSuccess(items: locations);
      } catch (_) {
        yield LocationFailure();
      }
    } else if (event is OnRefresh) {
      try {
        final response = await repository.getLocationUnits(
            locationType: event.locationType, filterId: event.filterId);
        List<LocationUnit> locations = response.map((location) {
          if (location.id == event.selectedId) {
            location.isSelected = true;
          }
          return location;
        }).toList();
        yield LocationSuccess(items: locations);
      } catch (_) {
        yield LocationFailure();
      }
    } else if (event is OnSearch) {
      try {
        final response = await repository.getLocationUnits(
            locationType: event.locationType, filterId: event.filterId);
        bool query(LocationUnit locationUnit) =>
            event.searchString.isEmpty ||
            locationUnit.name
                .toLowerCase()
                .contains(event.searchString.toLowerCase());
        final result = response.where(query).toList();
        List<LocationUnit> locations = result.map((location) {
          if (location.id == event.selectedId) {
            location.isSelected = true;
          }
          return location;
        }).toList();
        yield LocationSuccess(items: locations);
      } catch (_) {
        yield LocationFailure();
      }
    }
  }
}