yubioath-flutter/lib/core/state.dart
2023-03-03 16:30:54 +01:00

57 lines
1.5 KiB
Dart

/*
* Copyright (C) 2022 Yubico.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import 'package:flutter/foundation.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:shared_preferences/shared_preferences.dart';
bool get isDesktop {
return const [
TargetPlatform.windows,
TargetPlatform.macOS,
TargetPlatform.linux
].contains(defaultTargetPlatform);
}
bool get isAndroid {
return defaultTargetPlatform == TargetPlatform.android;
}
// This must be initialized before use, in main.dart.
final prefProvider = Provider<SharedPreferences>((ref) {
throw UnimplementedError();
});
abstract class ApplicationStateNotifier<T>
extends StateNotifier<AsyncValue<T>> {
ApplicationStateNotifier() : super(const AsyncValue.loading());
@protected
Future<void> updateState(Future<T> Function() guarded) async {
final result = await AsyncValue.guard(guarded);
if (mounted) {
state = result;
}
}
@protected
void setData(T value) {
if (mounted) {
state = AsyncValue.data(value);
}
}
}