added audio output for demo songs since spotify api doesnt support audio streaming
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14 changed files with 1261 additions and 77 deletions
242
CHALLENGE_2/sleepysound/lib/services/audio_service.dart
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242
CHALLENGE_2/sleepysound/lib/services/audio_service.dart
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import 'package:audioplayers/audioplayers.dart';
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import 'package:flutter/foundation.dart';
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import '../models/spotify_track.dart';
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class AudioService extends ChangeNotifier {
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static final AudioService _instance = AudioService._internal();
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factory AudioService() => _instance;
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AudioService._internal() {
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_initializePlayer();
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}
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final AudioPlayer _audioPlayer = AudioPlayer();
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// Current track state
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SpotifyTrack? _currentTrack;
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bool _isPlaying = false;
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bool _isLoading = false;
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Duration _currentPosition = Duration.zero;
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Duration _totalDuration = Duration.zero;
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// Getters
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SpotifyTrack? get currentTrack => _currentTrack;
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bool get isPlaying => _isPlaying;
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bool get isLoading => _isLoading;
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Duration get currentPosition => _currentPosition;
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Duration get totalDuration => _totalDuration;
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double get progress => _totalDuration.inMilliseconds > 0
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? _currentPosition.inMilliseconds / _totalDuration.inMilliseconds
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: 0.0;
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// Free audio sources for demo purposes
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// Using royalty-free music from reliable sources
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final Map<String, String> _demoAudioUrls = {
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// Peaceful, lido-appropriate tracks
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'pop1': 'https://www.bensound.com/bensound-music/bensound-relaxing.mp3',
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'pop2': 'https://www.bensound.com/bensound-music/bensound-sunny.mp3',
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'pop3': 'https://www.bensound.com/bensound-music/bensound-jazzcomedy.mp3',
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'pop4': 'https://www.bensound.com/bensound-music/bensound-acousticbreeze.mp3',
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'1': 'https://www.bensound.com/bensound-music/bensound-creativeminds.mp3',
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'2': 'https://www.bensound.com/bensound-music/bensound-happyrock.mp3',
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'3': 'https://www.bensound.com/bensound-music/bensound-ukulele.mp3',
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'4': 'https://www.bensound.com/bensound-music/bensound-summer.mp3',
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'5': 'https://www.bensound.com/bensound-music/bensound-happiness.mp3',
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};
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void _initializePlayer() {
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// Listen to player state changes
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_audioPlayer.onPlayerStateChanged.listen((PlayerState state) {
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_isPlaying = state == PlayerState.playing;
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_isLoading = state == PlayerState.stopped && _currentTrack != null;
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notifyListeners();
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});
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// Listen to position changes
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_audioPlayer.onPositionChanged.listen((Duration position) {
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_currentPosition = position;
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notifyListeners();
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});
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// Listen to duration changes
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_audioPlayer.onDurationChanged.listen((Duration duration) {
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_totalDuration = duration;
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notifyListeners();
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});
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// Listen for track completion
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_audioPlayer.onPlayerComplete.listen((_) {
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_onTrackComplete();
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});
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}
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Future<void> playTrack(SpotifyTrack track) async {
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try {
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_isLoading = true;
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_currentTrack = track;
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notifyListeners();
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// Check if we have a demo URL for this track
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String? audioUrl = _demoAudioUrls[track.id];
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if (audioUrl != null) {
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// Play the demo audio
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await _audioPlayer.play(UrlSource(audioUrl));
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print('Playing audio for: ${track.name} by ${track.artistNames}');
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} else {
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// For tracks without demo URLs, simulate playback
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print('Simulating playback for: ${track.name} by ${track.artistNames}');
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_simulateTrackPlayback(track);
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}
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_isLoading = false;
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notifyListeners();
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} catch (e) {
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print('Error playing track: $e');
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_isLoading = false;
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// Fallback to simulation
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_simulateTrackPlayback(track);
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notifyListeners();
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}
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}
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void _simulateTrackPlayback(SpotifyTrack track) {
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// Set simulated duration
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_totalDuration = Duration(milliseconds: track.durationMs);
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_currentPosition = Duration.zero;
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_isPlaying = true;
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// Simulate playback progress
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_startSimulatedProgress();
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}
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void _startSimulatedProgress() {
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if (_isPlaying && _currentTrack != null) {
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Future.delayed(const Duration(seconds: 1), () {
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if (_isPlaying && _currentTrack != null) {
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_currentPosition = _currentPosition + const Duration(seconds: 1);
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if (_currentPosition >= _totalDuration) {
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_onTrackComplete();
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} else {
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notifyListeners();
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_startSimulatedProgress();
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}
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}
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});
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}
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}
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Future<void> togglePlayPause() async {
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try {
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if (_isPlaying) {
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await _audioPlayer.pause();
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} else {
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if (_currentTrack != null) {
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// Check if we have a real audio URL
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String? audioUrl = _demoAudioUrls[_currentTrack!.id];
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if (audioUrl != null) {
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await _audioPlayer.resume();
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} else {
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// Resume simulation
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_isPlaying = true;
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_startSimulatedProgress();
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}
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}
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}
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notifyListeners();
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} catch (e) {
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print('Error toggling play/pause: $e');
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// Fallback to simulation toggle
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_isPlaying = !_isPlaying;
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if (_isPlaying) {
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_startSimulatedProgress();
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}
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notifyListeners();
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}
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}
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Future<void> stop() async {
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try {
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await _audioPlayer.stop();
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} catch (e) {
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print('Error stopping audio: $e');
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}
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_isPlaying = false;
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_currentPosition = Duration.zero;
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_currentTrack = null;
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notifyListeners();
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}
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Future<void> seekTo(Duration position) async {
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try {
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// Check if we have a real audio URL
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if (_currentTrack != null && _demoAudioUrls.containsKey(_currentTrack!.id)) {
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await _audioPlayer.seek(position);
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} else {
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// Simulate seeking
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_currentPosition = position;
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notifyListeners();
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}
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} catch (e) {
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print('Error seeking: $e');
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// Fallback to simulation
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_currentPosition = position;
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notifyListeners();
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}
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}
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void _onTrackComplete() {
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_isPlaying = false;
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_currentPosition = Duration.zero;
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notifyListeners();
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// Notify that track is complete (for queue management)
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onTrackComplete?.call();
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}
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// Callback for when a track completes
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Function()? onTrackComplete;
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@override
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void dispose() {
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_audioPlayer.dispose();
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super.dispose();
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}
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// Get formatted time strings
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String get currentPositionString => _formatDuration(_currentPosition);
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String get totalDurationString => _formatDuration(_totalDuration);
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String _formatDuration(Duration duration) {
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String twoDigits(int n) => n.toString().padLeft(2, '0');
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String twoDigitMinutes = twoDigits(duration.inMinutes.remainder(60));
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String twoDigitSeconds = twoDigits(duration.inSeconds.remainder(60));
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return '$twoDigitMinutes:$twoDigitSeconds';
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}
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// Add better demo audio URLs (using royalty-free sources)
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void addDemoAudioUrl(String trackId, String audioUrl) {
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_demoAudioUrls[trackId] = audioUrl;
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}
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// Add local asset support
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Future<void> playAsset(SpotifyTrack track, String assetPath) async {
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try {
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_isLoading = true;
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_currentTrack = track;
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notifyListeners();
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await _audioPlayer.play(AssetSource(assetPath));
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print('Playing asset: $assetPath for ${track.name}');
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_isLoading = false;
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notifyListeners();
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} catch (e) {
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print('Error playing asset: $e');
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_isLoading = false;
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_simulateTrackPlayback(track);
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notifyListeners();
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}
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}
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}
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