[linting_tool] Implement editing profile (#874)

experimental/linting_tool/lib/model/editing_controller.dart

@@ -0,0 +1,51 @@
+// Copyright 2021 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:linting_tool/model/profile.dart';
+import 'package:linting_tool/model/profiles_store.dart';
+import 'package:linting_tool/model/rule.dart';
+
+class EditingController extends ChangeNotifier {
+  bool _isEditing;
+
+  EditingController({bool? isEditing}) : _isEditing = isEditing ?? false;
+
+  bool get isEditing => _isEditing;
+
+  set isEditing(bool enabled) {
+    _selectedRules.clear();
+    _isEditing = enabled;
+    notifyListeners();
+  }
+
+  final List<Rule> _selectedRules = [];
+
+  List<Rule> get selectedRules => _selectedRules;
+
+  void selectRule(Rule rule) {
+    _selectedRules.add(rule);
+    notifyListeners();
+  }
+
+  void deselectRule(Rule rule) {
+    _selectedRules.remove(rule);
+    notifyListeners();
+  }
+
+  Future deleteSelected(
+      RulesProfile profile, ProfilesStore profilesStore) async {
+    var rules = profile.rules;
+    for (var rule in _selectedRules) {
+      rules.remove(rule);
+    }
+
+    RulesProfile newProfile = RulesProfile(name: profile.name, rules: rules);
+
+    await profilesStore.updateProfile(profile, newProfile);
+
+    isEditing = false;
+    notifyListeners();
+  }
+}