489 lines
15 KiB
Dart
489 lines
15 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/services.dart';
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import 'package:timezone/data/latest.dart' as tz;
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import 'app_theme_business_object.dart';
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import 'carplay_bridge.dart';
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import 'casting_business_object.dart';
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import 'live_info_business_object.dart';
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import 'live_info_panel.dart';
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import 'streaming_audio_business_object.dart';
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Future<void> main() async {
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WidgetsFlutterBinding.ensureInitialized();
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tz.initializeTimeZones();
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runApp(const MyApp());
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// Keep startup non-blocking so UI can render even if background media
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// services are initializing after an Android Auto cold start.
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unawaited(
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SystemChrome.setPreferredOrientations([
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DeviceOrientation.portraitUp,
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DeviceOrientation.portraitDown,
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]),
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);
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}
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class MyApp extends StatefulWidget {
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const MyApp({super.key});
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@override
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State<MyApp> createState() => _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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final StreamingAudioBusinessObject _audio = StreamingAudioBusinessObject();
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final CastingBusinessObject _casting = CastingBusinessObject();
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late final CarPlayBridge _carPlayBridge;
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@override
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void initState() {
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super.initState();
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_carPlayBridge = CarPlayBridge(audio: _audio);
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unawaited(_audio.ensureInitialized());
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unawaited(_carPlayBridge.start());
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_casting.initialize();
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}
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@override
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void dispose() {
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unawaited(_carPlayBridge.dispose());
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_casting.dispose();
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_audio.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'KRYZ Go!',
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theme: AppThemeBusinessObject.lightTheme(),
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darkTheme: AppThemeBusinessObject.darkTheme(),
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themeMode: ThemeMode.system,
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home: MainPage(audio: _audio, casting: _casting),
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debugShowCheckedModeBanner: false,
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);
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}
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}
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class MainPage extends StatefulWidget {
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const MainPage({super.key, required this.audio, required this.casting});
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final StreamingAudioBusinessObject audio;
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final CastingBusinessObject casting;
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@override
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State<MainPage> createState() => _MainPageState();
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}
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class _MainPageState extends State<MainPage> with WidgetsBindingObserver {
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StreamingAudioBusinessObject get _audio => widget.audio;
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CastingBusinessObject get _casting => widget.casting;
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final LiveInfoBusinessObject _liveInfo = LiveInfoBusinessObject();
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static const List<int> _intervalOptions = <int>[5, 10, 15, 30, 60];
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bool _isStartingCastStream = false;
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bool _pendingRemotePlay = false;
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bool get _usesExternalCastPlayback =>
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_casting.isConnected && defaultTargetPlatform == TargetPlatform.android;
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bool get _isIosAirPlay => defaultTargetPlatform == TargetPlatform.iOS;
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bool get _isUsingRemotePlayback => _usesExternalCastPlayback;
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bool get _isPlaybackStopped {
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if (_isUsingRemotePlayback) {
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return _casting.isStopped ||
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_casting.playbackStatus == CastingPlaybackStatus.unknown;
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}
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return _audio.isStopped;
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}
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bool get _isPlaybackPlaying {
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if (_isUsingRemotePlayback) {
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return _casting.isPlaying;
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}
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return _audio.isPlaying;
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}
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bool get _isPlaybackBuffering {
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if (_isUsingRemotePlayback) {
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return _casting.isBuffering;
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}
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return _audio.isBuffering;
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}
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String _playbackStatusLabel() {
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if (_isPlaybackBuffering) {
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return 'Buffering...';
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}
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if (_isPlaybackPlaying) {
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return 'Playing';
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}
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return 'Stopped';
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}
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static const _playbackChannel = MethodChannel(
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'kryz_go_flutter/playback/methods',
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);
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@override
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void initState() {
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super.initState();
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WidgetsBinding.instance.addObserver(this);
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_audio.addListener(_handleAudioStateChanged);
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_casting.addListener(_handleCastingStateChanged);
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_liveInfo.addListener(_handleLiveInfoChanged);
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_liveInfo.start();
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_playbackChannel.setMethodCallHandler(_handlePlaybackMethodCall);
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// When native code requests local audio to stop (cast media loaded)
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_casting.onStopLocalAudioRequested = () {
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unawaited(_audio.stop());
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};
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}
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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if (state == AppLifecycleState.resumed) {
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// Re-initialize (not just refresh) to re-establish the EventChannel
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// subscription. In a cold-start Android Auto scenario the Flutter engine
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// boots headlessly before MainActivity.configureFlutterEngine() runs, so
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// the native EventChannel StreamHandler is not yet registered when
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// initialize() first fires. The "listen" message is dropped, eventSink
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// stays null, and all subsequent emitStatus() calls are silently lost.
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// Calling initialize() here cancels that dead subscription and creates a
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// fresh one now that the handler is registered; onListen immediately
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// re-emits statusPayload so the Dart state is fully re-synced.
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unawaited(_casting.initialize());
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}
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}
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Future<void> _handlePlaybackMethodCall(MethodCall call) async {
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switch (call.method) {
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case 'play':
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await _play();
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case 'stop':
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await _stop();
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}
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}
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void _handleAudioStateChanged() {
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if (!mounted) {
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return;
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}
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setState(() {
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// Rebuild when playback state changes from the player.
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});
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}
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void _handleLiveInfoChanged() {
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_audio.updateMetadataFromLiveInfo(_liveInfo.snapshot);
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if (!mounted) {
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return;
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}
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setState(() {
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// Rebuild when live metadata updates from the polling API.
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});
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}
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void _handleCastingStateChanged() {
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final currentStatus = _casting.status;
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if (_casting.isPlaying || _casting.isBuffering) {
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_pendingRemotePlay = false;
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}
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if (currentStatus != CastingStatus.connected) {
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_isStartingCastStream = false;
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}
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if (_usesExternalCastPlayback &&
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_pendingRemotePlay &&
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!_isStartingCastStream) {
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// Only load when _pendingRemotePlay was set by _play() while connecting.
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// Do NOT trigger on justConnected — native pendingCastRequest handles
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// all autoplay from showDevicePicker(autoplay: true).
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_startCastingLiveStream();
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}
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if (!_usesExternalCastPlayback &&
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currentStatus != CastingStatus.connecting) {
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_pendingRemotePlay = false;
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}
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if (!mounted) {
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return;
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}
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setState(() {
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// Rebuild when cast state changes from the native platforms.
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});
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}
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Future<void> _startCastingLiveStream() async {
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_isStartingCastStream = true;
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try {
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await _casting.startCastingLiveStream(
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streamUrl: _audio.streamUrl,
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title: _audio.currentTitle,
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subtitle: _audio.currentSubtitle,
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);
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_pendingRemotePlay = false;
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if (_usesExternalCastPlayback && !_audio.isStopped) {
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await _audio.stop();
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}
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} catch (_) {
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_pendingRemotePlay = !_audio.isStopped;
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} finally {
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_isStartingCastStream = false;
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}
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}
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Future<void> _play() async {
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if (_casting.status == CastingStatus.connecting) {
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_pendingRemotePlay = true;
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return;
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}
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if (_usesExternalCastPlayback) {
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if (_casting.isPlaying || _isStartingCastStream) {
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return;
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}
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await _startCastingLiveStream();
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return;
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}
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_pendingRemotePlay = false;
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await _audio.play();
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}
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Future<void> _stop() async {
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if (_usesExternalCastPlayback) {
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await _casting.stopPlayback();
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return;
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}
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await _audio.stop();
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}
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Future<void> _toggleCasting() async {
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if (_casting.isConnected) {
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await _casting.disconnect();
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return;
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}
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final shouldAutoplay = !_audio.isStopped;
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// Do NOT set _pendingRemotePlay when native handles autoplay.
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// The native pendingCastRequest already handles autoplay via
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// showDevicePicker(autoplay: true). Setting _pendingRemotePlay here
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// causes a duplicate load from Flutter that races the native load and
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// corrupts the cast status (especially in the Android Auto path).
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// _pendingRemotePlay is only set by _play() when the user explicitly
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// presses Play while the cast session is still connecting.
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_pendingRemotePlay = false;
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await _casting.showDevicePicker(
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autoplay: shouldAutoplay,
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streamUrl: shouldAutoplay ? _audio.streamUrl : null,
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title: shouldAutoplay ? _audio.currentTitle : null,
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subtitle: shouldAutoplay ? _audio.currentSubtitle : null,
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);
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}
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String _castingLabel() {
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final idleLabel = _isIosAirPlay ? 'AirPlay' : 'Cast';
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final connectingLabel = _isIosAirPlay ? 'AirPlay...' : 'Casting...';
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final errorLabel = _isIosAirPlay ? 'AirPlay Error' : 'Cast Error';
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final unavailableLabel = _isIosAirPlay ? 'No AirPlay' : 'No Cast';
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switch (_casting.status) {
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case CastingStatus.idle:
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return idleLabel;
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case CastingStatus.connecting:
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return connectingLabel;
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case CastingStatus.connected:
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final deviceName = _casting.connectedDeviceName;
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if (deviceName != null && deviceName.isNotEmpty) {
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return 'On $deviceName';
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}
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return _isIosAirPlay ? 'AirPlaying' : 'Casting';
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case CastingStatus.error:
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return errorLabel;
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case CastingStatus.unavailable:
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return unavailableLabel;
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}
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}
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IconData _castingIcon() {
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if (_isIosAirPlay) {
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return Icons.airplay_rounded;
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}
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return _casting.isConnected
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? Icons.cast_connected_rounded
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: Icons.cast_rounded;
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}
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@override
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void dispose() {
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WidgetsBinding.instance.removeObserver(this);
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_audio.removeListener(_handleAudioStateChanged);
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_casting.removeListener(_handleCastingStateChanged);
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_liveInfo.removeListener(_handleLiveInfoChanged);
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_liveInfo.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final themeColors = AppThemeBusinessObject.colorsFor(context);
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final theme = Theme.of(context);
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return Scaffold(
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body: DecoratedBox(
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: [
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themeColors.scaffoldGradientStart,
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themeColors.scaffoldGradientEnd,
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],
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),
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),
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child: SafeArea(
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child: Padding(
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padding: const EdgeInsets.all(12),
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child: Column(
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children: [
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Container(
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width: double.infinity,
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padding: const EdgeInsets.all(14),
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decoration: BoxDecoration(
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color: themeColors.shellSurface,
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borderRadius: BorderRadius.circular(24),
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border: Border.all(color: themeColors.shellBorder),
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boxShadow: [
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BoxShadow(
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color: themeColors.controlsShadow,
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blurRadius: 18,
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offset: const Offset(0, 10),
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),
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],
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),
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child: Row(
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children: [
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ClipRRect(
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borderRadius: BorderRadius.circular(18),
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child: Image.asset(
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'assets/icon/app_icon.png',
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width: 72,
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height: 72,
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fit: BoxFit.cover,
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),
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),
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const SizedBox(width: 14),
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Expanded(
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child: Text(
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'KRYZ Go!',
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textAlign: TextAlign.center,
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style: theme.textTheme.headlineMedium?.copyWith(
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fontWeight: FontWeight.w900,
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letterSpacing: 0.4,
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color: themeColors.statusText,
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),
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),
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),
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const SizedBox(width: 86),
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],
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),
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),
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const SizedBox(height: 12),
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Expanded(
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child: LiveInfoPanel(
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liveInfo: _liveInfo,
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themeColors: themeColors,
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intervalOptions: _intervalOptions,
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),
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),
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const SizedBox(height: 12),
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Container(
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width: double.infinity,
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padding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 14,
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),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(24),
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: [
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themeColors.controlsGradientStart,
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themeColors.controlsGradientEnd,
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],
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),
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boxShadow: [
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BoxShadow(
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color: themeColors.controlsShadow,
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blurRadius: 14,
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offset: const Offset(0, 6),
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),
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],
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),
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child: Wrap(
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alignment: WrapAlignment.center,
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crossAxisAlignment: WrapCrossAlignment.center,
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spacing: 12,
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runSpacing: 12,
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children: [
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ElevatedButton.icon(
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onPressed: _isPlaybackStopped ? _play : null,
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icon: const Icon(Icons.play_arrow_rounded),
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label: const Text('Play'),
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),
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ElevatedButton.icon(
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onPressed: _isPlaybackStopped ? null : _stop,
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icon: const Icon(Icons.stop_rounded),
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label: const Text('Stop'),
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),
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ElevatedButton.icon(
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onPressed: _casting.status == CastingStatus.connecting
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? null
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: _toggleCasting,
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icon: Icon(_castingIcon()),
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label: Text(_castingLabel()),
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),
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Text(
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_playbackStatusLabel(),
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style: theme.textTheme.titleSmall?.copyWith(
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fontWeight: FontWeight.w700,
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color: themeColors.statusText,
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),
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),
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],
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),
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),
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],
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),
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),
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),
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),
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);
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}
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}
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