106 lines
3.4 KiB
Dart
106 lines
3.4 KiB
Dart
import 'dart:async';
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import 'package:flutter/widgets.dart';
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import '/locator.dart';
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import 'logging_service.dart';
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typedef AddLifeCycleListener = void Function({
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required void Function(AppLifecycleState appLifecycleState) listener,
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required String tag,
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bool tryCallListenerOnAdd,
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});
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typedef RemoveLifeCycleListener = Future<void> Function({required String tag});
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/// Used to observe the current app lifecycle state.
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class AppLifecycleService with WidgetsBindingObserver {
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AppLifecycleService({
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required LoggingService loggingService,
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}) : _loggingService = loggingService {
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WidgetsBinding.instance.addObserver(this);
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_appLifeCycleState = WidgetsBinding.instance.lifecycleState;
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}
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final LoggingService _loggingService;
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late final StreamController<AppLifecycleState> _lifecycleStateStreamController =
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StreamController.broadcast();
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final Map<String, StreamSubscription<dynamic>> _appLifecycleSubscriptions = {};
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AppLifecycleState? _appLifeCycleState;
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AppLifecycleState? get appLifeCycleState => _appLifeCycleState;
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Future<void> dispose() async {
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_loggingService.info('Disposing app lifecycle service..');
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WidgetsBinding.instance.removeObserver(this);
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for (final subscription in _appLifecycleSubscriptions.values) {
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await subscription.cancel();
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}
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_appLifecycleSubscriptions.clear();
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_loggingService.good('App lifecycle service disposed!');
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}
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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try {
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_appLifeCycleState = state;
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_lifecycleStateStreamController.add(state);
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} catch (error, stackTrace) {
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_loggingService.error(
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'Something went wrong with ${state.name} inside the didChangeAppLifeCycleState method',
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error,
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stackTrace,
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);
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}
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super.didChangeAppLifecycleState(state);
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}
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void addListener({
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required void Function(AppLifecycleState appLifecycleState) listener,
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required String tag,
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bool tryCallListenerOnAdd = true,
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}) {
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try {
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if (_appLifecycleSubscriptions.containsKey(tag)) {
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_loggingService.warning('Tag already active, returning');
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} else {
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final message = 'Adding $tag appLifecycleState listener';
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_loggingService.info('$message..');
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if (_appLifeCycleState != null && tryCallListenerOnAdd) listener(_appLifeCycleState!);
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_appLifecycleSubscriptions[tag] = _lifecycleStateStreamController.stream.listen(listener);
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_loggingService.good('$message success!');
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}
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} catch (error, stackTrace) {
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_loggingService.error(
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'Something went wrong adding $tag appLifecycleState listener',
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error,
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stackTrace,
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);
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}
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}
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Future<void> removeListener({required String tag}) async {
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try {
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final message = 'Removing $tag appLifecycleState listener';
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_loggingService.info('$message..');
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final subscription = _appLifecycleSubscriptions[tag];
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if (subscription != null) {
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await subscription.cancel();
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_appLifecycleSubscriptions.remove(tag);
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_loggingService.good('$message success!');
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} else {
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_loggingService.warning('Subscription was not found');
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}
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} catch (error, stackTrace) {
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_loggingService.error(
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'Something went wrong removing $tag appLifecycleState listener',
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error,
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stackTrace,
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);
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}
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}
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static AppLifecycleService get locate => Locator.locate();
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}
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