AppFlowy/frontend/appflowy_flutter/lib/plugins/util.dart

import 'package:appflowy/startup/plugin/plugin.dart';
import 'package:appflowy/startup/startup.dart';
import 'package:appflowy/workspace/application/view/view_ext.dart';
import 'package:appflowy/workspace/application/view/view_listener.dart';
import 'package:dartz/dartz.dart';
import 'package:appflowy_backend/log.dart';
import 'package:appflowy_backend/protobuf/flowy-folder2/view.pb.dart';
import 'package:flutter/material.dart';

import '../workspace/presentation/home/home_stack.dart';

class ViewPluginNotifier extends PluginNotifier<Option<DeletedViewPB>> {
  final ViewListener? _viewListener;
  ViewPB view;

  @override
  final ValueNotifier<Option<DeletedViewPB>> isDeleted = ValueNotifier(none());

  ViewPluginNotifier({
    required this.view,
    required bool listenOnViewChanged,
  }) : _viewListener = ViewListener(viewId: view.id) {
    if (listenOnViewChanged) {
      _viewListener?.start(
        onViewUpdated: (updatedView) {
          // If the layout is changed, we need to create a new plugin for it.
          if (view.layout != updatedView.layout) {
            getIt<HomeStackManager>().setPlugin(
              updatedView.plugin(
                listenOnViewChanged: listenOnViewChanged,
              ),
            );
          } else {
            view = updatedView;
          }
        },
        onViewMoveToTrash: (result) {
          result.fold(
            (deletedView) => isDeleted.value = some(deletedView),
            (err) => Log.error(err),
          );
        },
      );
    }
  }

  @override
  void dispose() {
    isDeleted.dispose();
    _viewListener?.stop();
  }
}