AppFlowy/frontend/app_flowy/lib/workspace/application/home/home_bloc.dart

import 'package:app_flowy/workspace/application/edit_pannel/edit_context.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:dartz/dartz.dart';
part 'home_bloc.freezed.dart';

class HomeBloc extends Bloc<HomeEvent, HomeState> {
  HomeBloc() : super(HomeState.initial()) {
    on<HomeEvent>((event, emit) async {
      await event.map(
        showLoading: (e) async {
          emit(state.copyWith(isLoading: e.isLoading));
        },
        setEditPannel: (e) async {
          emit(state.copyWith(pannelContext: some(e.editContext)));
        },
        dismissEditPannel: (value) async {
          emit(state.copyWith(pannelContext: none()));
        },
        forceCollapse: (e) async {
          emit(state.copyWith(forceCollapse: e.forceCollapse));
        },
      );
    });
  }

  @override
  Future<void> close() {
    return super.close();
  }
}

@freezed
class HomeEvent with _$HomeEvent {
  const factory HomeEvent.showLoading(bool isLoading) = _ShowLoading;
  const factory HomeEvent.forceCollapse(bool forceCollapse) = _ForceCollapse;
  const factory HomeEvent.setEditPannel(EditPannelContext editContext) = _ShowEditPannel;
  const factory HomeEvent.dismissEditPannel() = _DismissEditPannel;
}

@freezed
class HomeState with _$HomeState {
  const factory HomeState({
    required bool isLoading,
    required bool forceCollapse,
    required Option<EditPannelContext> pannelContext,
  }) = _HomeState;

  factory HomeState.initial() => HomeState(
        isLoading: false,
        forceCollapse: false,
        pannelContext: none(),
      );
}