blob: 35f93eb226eb9a2c2ddbbaf69659a31a01c7223a [file] [log] [blame]
// Copyright 2018 The Fuchsia Authors. 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:fidl_fuchsia_setui/fidl.dart';
import 'setting_adapter.dart';
import 'setting_model.dart';
import 'setting_source.dart';
/// Base controller that handles interaction with the underlying setting adapter
/// and access to the state data.
class SettingController<T> {
final SettingAdapter _adapter;
SettingSource<T> _source;
/// Returns a setting model that will be updated with the latest state.
SettingModel<T> fetch() {
_source ??= _adapter.fetch(settingType);
return SettingModel<T>(_source);
SettingType get settingType {
switch (T) {
case TimeZoneInfo:
return SettingType.timeZone;
case WirelessState:
return SettingType.wireless;
case ConnectedState:
return SettingType.connectivity;
throw new Exception('Undefined setting type!');
Future<void> mutate(Mutation mutation, MutationHandles handles) async {
await _adapter.mutate(settingType, mutation, handles: handles);
/// Updates the setting state to the provided version.
Future<void> update(SettingsObject state) async {
await _adapter.update(state);
/// Returns the most current data from source.
T get state => _source.state;