added audio output for demo songs since spotify api doesnt support audio streaming

CHALLENGE_2/sleepysound/lib/main.dart

@@ -5,6 +5,8 @@ import 'pages/voting_page.dart';
 import 'pages/group_page.dart';
 import 'services/music_queue_service.dart';
 import 'services/network_group_service.dart';
+import 'services/spam_protection_service.dart';
+import 'services/audio_service.dart';
 
 void main() {
   runApp(const MyApp());
@@ -20,6 +22,8 @@ class MyApp extends StatelessWidget {
       providers: [
         ChangeNotifierProvider(create: (context) => MusicQueueService()),
         ChangeNotifierProvider(create: (context) => NetworkGroupService()),
+        ChangeNotifierProvider(create: (context) => SpamProtectionService()),
+        ChangeNotifierProvider(create: (context) => AudioService()),
       ],
       child: MaterialApp(
         title: 'SleepySound',
@@ -81,10 +85,6 @@ class _MyHomePageState extends State<MyHomePage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Text(_getPageTitle()),
-      ),
       body: _getSelectedPage(),
       bottomNavigationBar: BottomNavigationBar(
         items: const <BottomNavigationBarItem>[
@@ -110,17 +110,4 @@ class _MyHomePageState extends State<MyHomePage> {
       ),
     );
   }
-
-  String _getPageTitle() {
-    switch (_selectedIndex) {
-      case 0:
-        return 'Now Playing';
-      case 1:
-        return 'Voting';
-      case 2:
-        return 'Group';
-      default:
-        return 'Now Playing';
-    }
-  }
 }

CHALLENGE_2/sleepysound/lib/pages/voting_page.dart

@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../services/music_queue_service.dart';
+import '../services/spam_protection_service.dart';
+import '../services/genre_filter_service.dart';
 import '../models/spotify_track.dart';
+import '../widgets/user_activity_status.dart';
 
 class VotingPage extends StatefulWidget {
   const VotingPage({super.key});
@@ -30,6 +33,33 @@ class _VotingPageState extends State<VotingPage> {
   Future<void> _searchSpotify(String query) async {
     if (query.isEmpty) return;
 
+    // Check if search query is appropriate
+    if (!GenreFilterService.isSearchQueryAppropriate(query)) {
+      final suggestions = GenreFilterService.getAlternativeSearchSuggestions(query);
+      setState(() {
+        _isLoading = false;
+        _statusMessage = 'Search term not suitable for the peaceful Lido atmosphere. Try: ${suggestions.join(', ')}';
+        _searchResults = [];
+      });
+      return;
+    }
+
+    final spamService = Provider.of<SpamProtectionService>(context, listen: false);
+    final userId = spamService.getCurrentUserId();
+    
+    // Check spam protection for suggestions
+    if (!spamService.canSuggest(userId)) {
+      final cooldown = spamService.getSuggestionCooldownRemaining(userId);
+      final blockMessage = spamService.getBlockMessage(userId);
+      
+      setState(() {
+        _isLoading = false;
+        _statusMessage = blockMessage ?? 'Please wait $cooldown seconds before searching again.';
+        _searchResults = [];
+      });
+      return;
+    }
+
     setState(() {
       _isLoading = true;
       _statusMessage = 'Searching for "$query"...';
@@ -39,12 +69,24 @@ class _VotingPageState extends State<VotingPage> {
       final queueService = Provider.of<MusicQueueService>(context, listen: false);
       final results = await queueService.searchTracks(query);
       
+      // Filter results based on genre appropriateness
+      final filteredResults = GenreFilterService.filterSearchResults(results);
+      
+      // Record the suggestion attempt
+      spamService.recordSuggestion(userId);
+      
       setState(() {
-        _searchResults = results;
+        _searchResults = filteredResults;
         _isLoading = false;
-        _statusMessage = results.isEmpty 
+        if (filteredResults.isEmpty && results.isNotEmpty) {
-            ? 'No tracks found for "$query"'
+          _statusMessage = 'No tracks found that match the peaceful Lido atmosphere. Try searching for chill, ambient, or relaxing music.';
-            : 'Found ${results.length} tracks';
+        } else if (filteredResults.isEmpty) {
+          _statusMessage = 'No tracks found for "$query"';
+        } else {
+          final filtered = results.length - filteredResults.length;
+          _statusMessage = 'Found ${filteredResults.length} tracks' + 
+              (filtered > 0 ? ' ($filtered filtered for atmosphere)' : '');
+        }
       });
     } catch (e) {
       setState(() {
@@ -56,9 +98,43 @@ class _VotingPageState extends State<VotingPage> {
   }
 
   void _addToQueue(SpotifyTrack track) {
+    final spamService = Provider.of<SpamProtectionService>(context, listen: false);
+    final userId = spamService.getCurrentUserId();
+    
+    // Check if user can suggest (add to queue)
+    if (!spamService.canSuggest(userId)) {
+      final cooldown = spamService.getSuggestionCooldownRemaining(userId);
+      final blockMessage = spamService.getBlockMessage(userId);
+      
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(blockMessage ?? 'Please wait $cooldown seconds before adding another song.'),
+          duration: const Duration(seconds: 3),
+          backgroundColor: Colors.orange,
+        ),
+      );
+      return;
+    }
+
+    // Check if track is appropriate for atmosphere
+    final rejectionReason = GenreFilterService.getRejectionReason(track);
+    if (rejectionReason != null) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(rejectionReason),
+          duration: const Duration(seconds: 4),
+          backgroundColor: Colors.orange,
+        ),
+      );
+      return;
+    }
+
     final queueService = Provider.of<MusicQueueService>(context, listen: false);
     queueService.addToQueue(track);
     
+    // Record the suggestion
+    spamService.recordSuggestion(userId);
+    
     ScaffoldMessenger.of(context).showSnackBar(
       SnackBar(
         content: Text('Added "${track.name}" to queue'),
@@ -77,6 +153,13 @@ class _VotingPageState extends State<VotingPage> {
           body: SafeArea(
             child: Column(
               children: [
+                // User Activity Status
+                Consumer<SpamProtectionService>(
+                  builder: (context, spamService, child) {
+                    return UserActivityStatus(spamService: spamService);
+                  },
+                ),
+                
                 // Header with Search
                 Container(
                   padding: const EdgeInsets.all(20),
@@ -149,6 +232,81 @@ class _VotingPageState extends State<VotingPage> {
                         onSubmitted: _searchSpotify,
                       ),
                       
+                      // Atmosphere Info
+                      Container(
+                        margin: const EdgeInsets.only(top: 16),
+                        padding: const EdgeInsets.all(16),
+                        decoration: BoxDecoration(
+                          color: const Color(0xFF6366F1).withOpacity(0.1),
+                          borderRadius: BorderRadius.circular(12),
+                          border: Border.all(color: const Color(0xFF6366F1).withOpacity(0.3)),
+                        ),
+                        child: Column(
+                          crossAxisAlignment: CrossAxisAlignment.start,
+                          children: [
+                            const Row(
+                              children: [
+                                Icon(Icons.spa, color: Color(0xFF6366F1), size: 20),
+                                SizedBox(width: 8),
+                                Text(
+                                  'Lido Atmosphere',
+                                  style: TextStyle(
+                                    color: Color(0xFF6366F1),
+                                    fontWeight: FontWeight.bold,
+                                    fontSize: 14,
+                                  ),
+                                ),
+                              ],
+                            ),
+                            const SizedBox(height: 8),
+                            Text(
+                              GenreFilterService.getAtmosphereDescription(),
+                              style: const TextStyle(
+                                color: Colors.grey,
+                                fontSize: 12,
+                              ),
+                            ),
+                            const SizedBox(height: 12),
+                            const Text(
+                              'Try these searches:',
+                              style: TextStyle(
+                                color: Colors.white,
+                                fontWeight: FontWeight.w500,
+                                fontSize: 12,
+                              ),
+                            ),
+                            const SizedBox(height: 8),
+                            Wrap(
+                              spacing: 8,
+                              runSpacing: 4,
+                              children: GenreFilterService.getSuggestedSearchTerms()
+                                  .take(8)
+                                  .map((term) => InkWell(
+                                        onTap: () {
+                                          _searchController.text = term;
+                                          _searchSpotify(term);
+                                        },
+                                        child: Container(
+                                          padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+                                          decoration: BoxDecoration(
+                                            color: const Color(0xFF6366F1).withOpacity(0.2),
+                                            borderRadius: BorderRadius.circular(12),
+                                          ),
+                                          child: Text(
+                                            term,
+                                            style: const TextStyle(
+                                              color: Color(0xFF6366F1),
+                                              fontSize: 11,
+                                            ),
+                                          ),
+                                        ),
+                                      ))
+                                  .toList(),
+                            ),
+                          ],
+                        ),
+                      ),
+                      
                       // Status Message
                       if (_statusMessage.isNotEmpty)
                         Padding(
@@ -458,13 +616,25 @@ class _VotingPageState extends State<VotingPage> {
             // Voting Buttons
             Column(
               children: [
-                IconButton(
+                Consumer<SpamProtectionService>(
-                  onPressed: () => queueService.upvote(index),
+                  builder: (context, spamService, child) {
-                  icon: const Icon(
+                    final userId = spamService.getCurrentUserId();
-                    Icons.keyboard_arrow_up,
+                    final canVote = spamService.canVote(userId);
-                    color: Colors.green,
+                    final cooldown = spamService.getVoteCooldownRemaining(userId);
-                    size: 28,
+                    
-                  ),
+                    return IconButton(
+                      onPressed: canVote ? () {
+                        queueService.upvote(index);
+                        spamService.recordVote(userId);
+                      } : null,
+                      icon: Icon(
+                        Icons.keyboard_arrow_up,
+                        color: canVote ? Colors.green : Colors.grey,
+                        size: 28,
+                      ),
+                      tooltip: canVote ? 'Upvote' : 'Wait $cooldown seconds',
+                    );
+                  }
                 ),
                 Text(
                   '${queueItem.votes}',
@@ -473,13 +643,25 @@ class _VotingPageState extends State<VotingPage> {
                     fontWeight: FontWeight.bold,
                   ),
                 ),
-                IconButton(
+                Consumer<SpamProtectionService>(
-                  onPressed: () => queueService.downvote(index),
+                  builder: (context, spamService, child) {
-                  icon: const Icon(
+                    final userId = spamService.getCurrentUserId();
-                    Icons.keyboard_arrow_down,
+                    final canVote = spamService.canVote(userId);
-                    color: Colors.red,
+                    final cooldown = spamService.getVoteCooldownRemaining(userId);
-                    size: 28,
+                    
-                  ),
+                    return IconButton(
+                      onPressed: canVote ? () {
+                        queueService.downvote(index);
+                        spamService.recordVote(userId);
+                      } : null,
+                      icon: Icon(
+                        Icons.keyboard_arrow_down,
+                        color: canVote ? Colors.red : Colors.grey,
+                        size: 28,
+                      ),
+                      tooltip: canVote ? 'Downvote' : 'Wait $cooldown seconds',
+                    );
+                  }
                 ),
               ],
             ),

CHALLENGE_2/sleepysound/lib/services/audio_service.dart

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

CHALLENGE_2/sleepysound/lib/services/genre_filter_service.dart

@@ -0,0 +1,288 @@
+import 'package:flutter/foundation.dart';
+import '../models/spotify_track.dart';
+
+class GenreFilterService {
+  // Allowed genres for the Lido atmosphere (chill, ambient, relaxing)
+  static const List<String> allowedGenres = [
+    // Chill and Ambient
+    'chill',
+    'chillout',
+    'ambient',
+    'new age',
+    'meditation',
+    'nature sounds',
+    'spa',
+    'yoga',
+    
+    // Smooth genres
+    'smooth jazz',
+    'neo soul',
+    'downtempo',
+    'trip hop',
+    'lo-fi',
+    'lo-fi hip hop',
+    'chillwave',
+    'synthwave',
+    
+    // Acoustic and Folk
+    'acoustic',
+    'folk',
+    'indie folk',
+    'singer-songwriter',
+    'soft rock',
+    'alternative',
+    'indie',
+    
+    // World and Cultural
+    'world music',
+    'bossa nova',
+    'latin',
+    'reggae',
+    'dub',
+    'tropical',
+    'caribbean',
+    
+    // Electronic (chill variants)
+    'house',
+    'deep house',
+    'minimal techno',
+    'ambient techno',
+    'electronica',
+    'minimal',
+    
+    // Classical and Instrumental
+    'classical',
+    'instrumental',
+    'piano',
+    'string quartet',
+    'chamber music',
+    'contemporary classical',
+  ];
+  
+  // Explicitly blocked genres (too energetic/aggressive for Lido)
+  static const List<String> blockedGenres = [
+    'metal',
+    'death metal',
+    'black metal',
+    'hardcore',
+    'punk',
+    'hardcore punk',
+    'grindcore',
+    'screamo',
+    'dubstep',
+    'drum and bass',
+    'breakcore',
+    'speedcore',
+    'gabber',
+    'hardstyle',
+    'hard trance',
+    'psytrance',
+    'hard rock',
+    'thrash',
+    'noise',
+    'industrial',
+    'aggressive',
+    'rap',
+    'hip hop',
+    'trap',
+    'drill',
+    'grime',
+    'gangsta rap',
+  ];
+  
+  // Keywords that suggest inappropriate content
+  static const List<String> blockedKeywords = [
+    'explicit',
+    'party',
+    'club',
+    'rave',
+    'aggressive',
+    'angry',
+    'violent',
+    'loud',
+    'hardcore',
+    'extreme',
+    'intense',
+    'heavy',
+    'wild',
+    'crazy',
+    'insane',
+    'brutal',
+    'savage',
+    'beast',
+    'fire',
+    'lit',
+    'banger',
+    'drop',
+    'bass drop',
+    'festival',
+    'mosh',
+    'headbang',
+  ];
+  
+  // Check if a track is appropriate for the Lido atmosphere
+  static bool isTrackAllowed(SpotifyTrack track) {
+    final trackName = track.name.toLowerCase();
+    final artistNames = track.artists.map((a) => a.name.toLowerCase()).join(' ');
+    final albumName = track.album.name.toLowerCase();
+    
+    // Check for blocked keywords in track, artist, or album names
+    for (final keyword in blockedKeywords) {
+      if (trackName.contains(keyword) || 
+          artistNames.contains(keyword) || 
+          albumName.contains(keyword)) {
+        if (kDebugMode) {
+          print('Track blocked due to keyword: $keyword');
+        }
+        return false;
+      }
+    }
+    
+    // For now, we'll allow tracks unless they contain blocked keywords
+    // In a real implementation, you'd check against Spotify's genre data
+    return true;
+  }
+  
+  // Check if a genre is allowed
+  static bool isGenreAllowed(String genre) {
+    final lowerGenre = genre.toLowerCase();
+    
+    // Check if explicitly blocked
+    if (blockedGenres.contains(lowerGenre)) {
+      return false;
+    }
+    
+    // Check if explicitly allowed
+    if (allowedGenres.contains(lowerGenre)) {
+      return true;
+    }
+    
+    // Check for partial matches in allowed genres
+    for (final allowedGenre in allowedGenres) {
+      if (lowerGenre.contains(allowedGenre) || allowedGenre.contains(lowerGenre)) {
+        return true;
+      }
+    }
+    
+    // Check for partial matches in blocked genres
+    for (final blockedGenre in blockedGenres) {
+      if (lowerGenre.contains(blockedGenre) || blockedGenre.contains(lowerGenre)) {
+        return false;
+      }
+    }
+    
+    // Default to allowed if not explicitly blocked
+    return true;
+  }
+  
+  // Get suggested search terms for the atmosphere
+  static List<String> getSuggestedSearchTerms() {
+    return [
+      'chill',
+      'ambient',
+      'acoustic',
+      'coffee shop',
+      'study music',
+      'relaxing',
+      'peaceful',
+      'smooth',
+      'sunset',
+      'ocean',
+      'nature',
+      'meditation',
+      'spa music',
+      'lo-fi',
+      'bossa nova',
+      'jazz',
+      'instrumental',
+      'piano',
+      'guitar',
+      'folk',
+      'indie',
+      'world music',
+      'downtempo',
+      'chillout',
+      'lounge',
+      'soft rock',
+    ];
+  }
+  
+  // Get genre description for users
+  static String getAtmosphereDescription() {
+    return 'To maintain the peaceful Lido atmosphere, we feature chill, ambient, and relaxing music. Think coffee shop vibes, sunset sounds, and music that enhances tranquility.';
+  }
+  
+  // Filter search results based on allowed genres
+  static List<SpotifyTrack> filterSearchResults(List<SpotifyTrack> tracks) {
+    return tracks.where((track) => isTrackAllowed(track)).toList();
+  }
+  
+  // Get reason why a track might be rejected
+  static String? getRejectionReason(SpotifyTrack track) {
+    final trackName = track.name.toLowerCase();
+    final artistNames = track.artists.map((a) => a.name.toLowerCase()).join(' ');
+    final albumName = track.album.name.toLowerCase();
+    
+    // Check for blocked keywords
+    for (final keyword in blockedKeywords) {
+      if (trackName.contains(keyword) || 
+          artistNames.contains(keyword) || 
+          albumName.contains(keyword)) {
+        return 'This track contains content that might disturb the peaceful Lido atmosphere. Try searching for more chill or ambient music.';
+      }
+    }
+    
+    return null;
+  }
+  
+  // Check if search query suggests inappropriate content
+  static bool isSearchQueryAppropriate(String query) {
+    final lowerQuery = query.toLowerCase();
+    
+    for (final keyword in blockedKeywords) {
+      if (lowerQuery.contains(keyword)) {
+        return false;
+      }
+    }
+    
+    for (final genre in blockedGenres) {
+      if (lowerQuery.contains(genre)) {
+        return false;
+      }
+    }
+    
+    return true;
+  }
+  
+  // Get alternative search suggestions for inappropriate queries
+  static List<String> getAlternativeSearchSuggestions(String inappropriateQuery) {
+    // Map inappropriate terms to chill alternatives
+    final alternatives = {
+      'party': ['chill', 'lounge', 'relaxing'],
+      'club': ['ambient', 'downtempo', 'smooth'],
+      'rave': ['meditation', 'spa music', 'nature sounds'],
+      'metal': ['acoustic', 'folk', 'classical'],
+      'punk': ['indie', 'alternative', 'soft rock'],
+      'hardcore': ['peaceful', 'calming', 'serene'],
+      'aggressive': ['gentle', 'soothing', 'mellow'],
+      'loud': ['quiet', 'soft', 'whisper'],
+      'heavy': ['light', 'airy', 'floating'],
+      'intense': ['relaxed', 'easy', 'laid-back'],
+    };
+    
+    final suggestions = <String>[];
+    final lowerQuery = inappropriateQuery.toLowerCase();
+    
+    for (final entry in alternatives.entries) {
+      if (lowerQuery.contains(entry.key)) {
+        suggestions.addAll(entry.value);
+      }
+    }
+    
+    if (suggestions.isEmpty) {
+      suggestions.addAll(['chill', 'ambient', 'relaxing', 'peaceful']);
+    }
+    
+    return suggestions.take(3).toList();
+  }
+}

CHALLENGE_2/sleepysound/lib/services/music_queue_service.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/foundation.dart';
 import '../models/spotify_track.dart';
 import '../services/spotify_service.dart';
+import '../services/audio_service.dart';
 
 class QueueItem {
   final SpotifyTrack track;
@@ -33,11 +34,10 @@ class MusicQueueService extends ChangeNotifier {
   MusicQueueService._internal();
 
   final SpotifyService _spotifyService = SpotifyService();
+  final AudioService _audioService = AudioService();
   
   // Current playing track
   SpotifyTrack? _currentTrack;
-  bool _isPlaying = false;
-  double _progress = 0.0;
   
   // Queue management
   final List<QueueItem> _queue = [];
@@ -46,9 +46,9 @@ class MusicQueueService extends ChangeNotifier {
   final List<SpotifyTrack> _recentlyPlayed = [];
   
   // Getters
-  SpotifyTrack? get currentTrack => _currentTrack;
+  SpotifyTrack? get currentTrack => _audioService.currentTrack ?? _currentTrack;
-  bool get isPlaying => _isPlaying;
+  bool get isPlaying => _audioService.isPlaying;
-  double get progress => _progress;
+  double get progress => _audioService.progress;
   List<QueueItem> get queue => List.unmodifiable(_queue);
   List<SpotifyTrack> get recentlyPlayed => List.unmodifiable(_recentlyPlayed);
   
@@ -102,13 +102,14 @@ class MusicQueueService extends ChangeNotifier {
     });
   }
   
-  // Playback simulation
+  // Playback control
-  void playNext() {
+  Future<void> playNext() async {
     if (_queue.isNotEmpty) {
       final nextItem = _queue.removeAt(0);
       _currentTrack = nextItem.track;
-      _isPlaying = true;
+      
-      _progress = 0.0;
+      // Use audio service to actually play the track
+      await _audioService.playTrack(nextItem.track);
       
       // Add to recently played
       _recentlyPlayed.insert(0, nextItem.track);
@@ -118,37 +119,25 @@ class MusicQueueService extends ChangeNotifier {
       
       notifyListeners();
       print('Now playing: ${_currentTrack!.name} by ${_currentTrack!.artistNames}');
-      
-      // Simulate track progress
-      _simulatePlayback();
     }
   }
   
-  void togglePlayPause() {
+  Future<void> togglePlayPause() async {
-    _isPlaying = !_isPlaying;
+    await _audioService.togglePlayPause();
     notifyListeners();
   }
   
-  void skipTrack() {
+  Future<void> skipTrack() async {
-    playNext();
+    await playNext();
   }
   
-  void _simulatePlayback() {
+  Future<void> seekTo(double position) async {
-    if (_currentTrack == null) return;
+    if (_audioService.totalDuration != Duration.zero) {
-    
+      final seekPosition = Duration(
-    // Simulate track progress over time
+        milliseconds: (position * _audioService.totalDuration.inMilliseconds).round(),
-    Future.delayed(const Duration(seconds: 1), () {
+      );
-      if (_isPlaying && _currentTrack != null) {
+      await _audioService.seekTo(seekPosition);
-        _progress += 1.0 / (_currentTrack!.durationMs / 1000);
+    }
-        if (_progress >= 1.0) {
-          // Track finished, play next
-          playNext();
-        } else {
-          notifyListeners();
-          _simulatePlayback();
-        }
-      }
-    });
   }
   
   // Initialize with some popular tracks
@@ -165,9 +154,14 @@ class MusicQueueService extends ChangeNotifier {
           _queue.add(queueItem);
         }
         
+        // Set up audio service callback for track completion
+        _audioService.onTrackComplete = () {
+          playNext();
+        };
+        
         // Start playing the first track
         if (_queue.isNotEmpty) {
-          playNext();
+          await playNext();
         }
         
         notifyListeners();
@@ -189,16 +183,18 @@ class MusicQueueService extends ChangeNotifier {
   
   // Get current track info for display
   Map<String, dynamic>? get currentTrackInfo {
-    if (_currentTrack == null) return null;
+    final track = currentTrack;
+    if (track == null) return null;
     
     return {
-      'title': _currentTrack!.name,
+      'title': track.name,
-      'artist': _currentTrack!.artistNames,
+      'artist': track.artistNames,
-      'album': _currentTrack!.album.name,
+      'album': track.album.name,
-      'imageUrl': _currentTrack!.imageUrl,
+      'imageUrl': track.imageUrl,
-      'duration': _currentTrack!.duration,
+      'duration': _audioService.totalDurationString,
-      'progress': _progress,
+      'currentTime': _audioService.currentPositionString,
-      'isPlaying': _isPlaying,
+      'progress': progress,
+      'isPlaying': isPlaying,
     };
   }
 }

CHALLENGE_2/sleepysound/lib/services/spam_protection_service.dart

@@ -0,0 +1,243 @@
+import 'dart:async';
+import 'package:flutter/foundation.dart';
+
+class SpamProtectionService extends ChangeNotifier {
+  // Vote limits per user
+  static const int maxVotesPerHour = 20;
+  static const int maxVotesPerMinute = 5;
+  static const int maxSuggestionsPerHour = 10;
+  static const int maxSuggestionsPerMinute = 3;
+  
+  // Cooldown periods (in seconds)
+  static const int voteCooldown = 2;
+  static const int suggestionCooldown = 10;
+  
+  // User activity tracking
+  final Map<String, List<DateTime>> _userVotes = {};
+  final Map<String, List<DateTime>> _userSuggestions = {};
+  final Map<String, DateTime> _lastVoteTime = {};
+  final Map<String, DateTime> _lastSuggestionTime = {};
+  final Map<String, int> _consecutiveActions = {};
+  
+  // Blocked users (temporary)
+  final Map<String, DateTime> _blockedUsers = {};
+  
+  String getCurrentUserId() {
+    // In a real app, this would come from authentication
+    return 'current_user_${DateTime.now().millisecondsSinceEpoch ~/ 1000000}';
+  }
+  
+  // Check if user can vote
+  bool canVote(String userId) {
+    // Check if user is temporarily blocked
+    if (_isUserBlocked(userId)) {
+      return false;
+    }
+    
+    // Check cooldown
+    if (_isOnCooldown(userId, _lastVoteTime, voteCooldown)) {
+      return false;
+    }
+    
+    // Check rate limits
+    if (!_checkRateLimit(userId, _userVotes, maxVotesPerMinute, maxVotesPerHour)) {
+      return false;
+    }
+    
+    return true;
+  }
+  
+  // Check if user can suggest songs
+  bool canSuggest(String userId) {
+    // Check if user is temporarily blocked
+    if (_isUserBlocked(userId)) {
+      return false;
+    }
+    
+    // Check cooldown
+    if (_isOnCooldown(userId, _lastSuggestionTime, suggestionCooldown)) {
+      return false;
+    }
+    
+    // Check rate limits
+    if (!_checkRateLimit(userId, _userSuggestions, maxSuggestionsPerMinute, maxSuggestionsPerHour)) {
+      return false;
+    }
+    
+    return true;
+  }
+  
+  // Record a vote action
+  void recordVote(String userId) {
+    final now = DateTime.now();
+    
+    // Add to vote history
+    _userVotes.putIfAbsent(userId, () => []).add(now);
+    _lastVoteTime[userId] = now;
+    
+    // Track consecutive actions for spam detection
+    _incrementConsecutiveActions(userId);
+    
+    // Clean old entries
+    _cleanOldEntries(_userVotes[userId]!);
+    
+    // Check for suspicious behavior
+    _checkForSpam(userId);
+    
+    notifyListeners();
+  }
+  
+  // Record a suggestion action
+  void recordSuggestion(String userId) {
+    final now = DateTime.now();
+    
+    // Add to suggestion history
+    _userSuggestions.putIfAbsent(userId, () => []).add(now);
+    _lastSuggestionTime[userId] = now;
+    
+    // Track consecutive actions for spam detection
+    _incrementConsecutiveActions(userId);
+    
+    // Clean old entries
+    _cleanOldEntries(_userSuggestions[userId]!);
+    
+    // Check for suspicious behavior
+    _checkForSpam(userId);
+    
+    notifyListeners();
+  }
+  
+  // Get remaining cooldown time in seconds
+  int getVoteCooldownRemaining(String userId) {
+    final lastVote = _lastVoteTime[userId];
+    if (lastVote == null) return 0;
+    
+    final elapsed = DateTime.now().difference(lastVote).inSeconds;
+    return (voteCooldown - elapsed).clamp(0, voteCooldown);
+  }
+  
+  int getSuggestionCooldownRemaining(String userId) {
+    final lastSuggestion = _lastSuggestionTime[userId];
+    if (lastSuggestion == null) return 0;
+    
+    final elapsed = DateTime.now().difference(lastSuggestion).inSeconds;
+    return (suggestionCooldown - elapsed).clamp(0, suggestionCooldown);
+  }
+  
+  // Get user activity stats
+  Map<String, int> getUserStats(String userId) {
+    final now = DateTime.now();
+    final hourAgo = now.subtract(const Duration(hours: 1));
+    final minuteAgo = now.subtract(const Duration(minutes: 1));
+    
+    final votesThisHour = _userVotes[userId]?.where((time) => time.isAfter(hourAgo)).length ?? 0;
+    final votesThisMinute = _userVotes[userId]?.where((time) => time.isAfter(minuteAgo)).length ?? 0;
+    final suggestionsThisHour = _userSuggestions[userId]?.where((time) => time.isAfter(hourAgo)).length ?? 0;
+    final suggestionsThisMinute = _userSuggestions[userId]?.where((time) => time.isAfter(minuteAgo)).length ?? 0;
+    
+    return {
+      'votesThisHour': votesThisHour,
+      'votesThisMinute': votesThisMinute,
+      'suggestionsThisHour': suggestionsThisHour,
+      'suggestionsThisMinute': suggestionsThisMinute,
+      'maxVotesPerHour': maxVotesPerHour,
+      'maxVotesPerMinute': maxVotesPerMinute,
+      'maxSuggestionsPerHour': maxSuggestionsPerHour,
+      'maxSuggestionsPerMinute': maxSuggestionsPerMinute,
+    };
+  }
+  
+  // Check if user is blocked
+  bool _isUserBlocked(String userId) {
+    final blockTime = _blockedUsers[userId];
+    if (blockTime == null) return false;
+    
+    // Unblock after 5 minutes
+    if (DateTime.now().difference(blockTime).inMinutes >= 5) {
+      _blockedUsers.remove(userId);
+      return false;
+    }
+    
+    return true;
+  }
+  
+  // Check cooldown
+  bool _isOnCooldown(String userId, Map<String, DateTime> lastActionTime, int cooldownSeconds) {
+    final lastAction = lastActionTime[userId];
+    if (lastAction == null) return false;
+    
+    return DateTime.now().difference(lastAction).inSeconds < cooldownSeconds;
+  }
+  
+  // Check rate limits
+  bool _checkRateLimit(String userId, Map<String, List<DateTime>> userActions, int maxPerMinute, int maxPerHour) {
+    final actions = userActions[userId] ?? [];
+    final now = DateTime.now();
+    
+    // Count actions in the last minute
+    final actionsLastMinute = actions.where((time) => 
+        now.difference(time).inMinutes < 1).length;
+    if (actionsLastMinute >= maxPerMinute) return false;
+    
+    // Count actions in the last hour
+    final actionsLastHour = actions.where((time) => 
+        now.difference(time).inHours < 1).length;
+    if (actionsLastHour >= maxPerHour) return false;
+    
+    return true;
+  }
+  
+  // Clean old entries (older than 1 hour)
+  void _cleanOldEntries(List<DateTime> entries) {
+    final oneHourAgo = DateTime.now().subtract(const Duration(hours: 1));
+    entries.removeWhere((time) => time.isBefore(oneHourAgo));
+  }
+  
+  // Track consecutive actions for spam detection
+  void _incrementConsecutiveActions(String userId) {
+    _consecutiveActions[userId] = (_consecutiveActions[userId] ?? 0) + 1;
+    
+    // Reset after some time of inactivity
+    Timer(const Duration(seconds: 30), () {
+      _consecutiveActions[userId] = 0;
+    });
+  }
+  
+  // Check for spam behavior and block if necessary
+  void _checkForSpam(String userId) {
+    final consecutive = _consecutiveActions[userId] ?? 0;
+    
+    // Block user if too many consecutive actions
+    if (consecutive > 15) {
+      _blockedUsers[userId] = DateTime.now();
+      if (kDebugMode) {
+        print('User $userId temporarily blocked for spam behavior');
+      }
+    }
+  }
+  
+  // Get block status message
+  String? getBlockMessage(String userId) {
+    final blockTime = _blockedUsers[userId];
+    if (blockTime == null) return null;
+    
+    final remaining = 5 - DateTime.now().difference(blockTime).inMinutes;
+    if (remaining <= 0) {
+      _blockedUsers.remove(userId);
+      return null;
+    }
+    
+    return 'You are temporarily blocked for $remaining more minutes due to excessive activity.';
+  }
+  
+  // Clear all data (for testing)
+  void clearAllData() {
+    _userVotes.clear();
+    _userSuggestions.clear();
+    _lastVoteTime.clear();
+    _lastSuggestionTime.clear();
+    _consecutiveActions.clear();
+    _blockedUsers.clear();
+    notifyListeners();
+  }
+}

CHALLENGE_2/sleepysound/lib/widgets/user_activity_status.dart

@@ -0,0 +1,125 @@
+import 'package:flutter/material.dart';
+import '../services/spam_protection_service.dart';
+
+class UserActivityStatus extends StatelessWidget {
+  final SpamProtectionService spamService;
+  
+  const UserActivityStatus({
+    super.key,
+    required this.spamService,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final userId = spamService.getCurrentUserId();
+    final stats = spamService.getUserStats(userId);
+    final blockMessage = spamService.getBlockMessage(userId);
+    
+    if (blockMessage != null) {
+      return Container(
+        margin: const EdgeInsets.all(16),
+        padding: const EdgeInsets.all(16),
+        decoration: BoxDecoration(
+          color: Colors.red.withOpacity(0.1),
+          borderRadius: BorderRadius.circular(12),
+          border: Border.all(color: Colors.red.withOpacity(0.3)),
+        ),
+        child: Row(
+          children: [
+            const Icon(Icons.block, color: Colors.red),
+            const SizedBox(width: 12),
+            Expanded(
+              child: Text(
+                blockMessage,
+                style: const TextStyle(color: Colors.red, fontSize: 14),
+              ),
+            ),
+          ],
+        ),
+      );
+    }
+    
+    // Show activity limits if user is getting close
+    final votesUsed = stats['votesThisHour']!;
+    final suggestionsUsed = stats['suggestionsThisHour']!;
+    final maxVotes = stats['maxVotesPerHour']!;
+    final maxSuggestions = stats['maxSuggestionsPerHour']!;
+    
+    final showWarning = votesUsed > maxVotes * 0.8 || suggestionsUsed > maxSuggestions * 0.8;
+    
+    if (!showWarning) {
+      return const SizedBox.shrink();
+    }
+    
+    return Container(
+      margin: const EdgeInsets.all(16),
+      padding: const EdgeInsets.all(12),
+      decoration: BoxDecoration(
+        color: Colors.orange.withOpacity(0.1),
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(color: Colors.orange.withOpacity(0.3)),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          const Row(
+            children: [
+              Icon(Icons.warning, color: Colors.orange, size: 16),
+              SizedBox(width: 8),
+              Text(
+                'Activity Limits',
+                style: TextStyle(
+                  color: Colors.orange,
+                  fontWeight: FontWeight.bold,
+                  fontSize: 12,
+                ),
+              ),
+            ],
+          ),
+          const SizedBox(height: 8),
+          Row(
+            children: [
+              Expanded(
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      'Votes: $votesUsed/$maxVotes',
+                      style: const TextStyle(color: Colors.white, fontSize: 11),
+                    ),
+                    LinearProgressIndicator(
+                      value: votesUsed / maxVotes,
+                      backgroundColor: Colors.grey.withOpacity(0.3),
+                      valueColor: AlwaysStoppedAnimation<Color>(
+                        votesUsed > maxVotes * 0.9 ? Colors.red : Colors.orange,
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              const SizedBox(width: 16),
+              Expanded(
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      'Suggestions: $suggestionsUsed/$maxSuggestions',
+                      style: const TextStyle(color: Colors.white, fontSize: 11),
+                    ),
+                    LinearProgressIndicator(
+                      value: suggestionsUsed / maxSuggestions,
+                      backgroundColor: Colors.grey.withOpacity(0.3),
+                      valueColor: AlwaysStoppedAnimation<Color>(
+                        suggestionsUsed > maxSuggestions * 0.9 ? Colors.red : Colors.orange,
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+}

CHALLENGE_2/sleepysound/linux/flutter/generated_plugin_registrant.cc

@@ -6,9 +6,13 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <audioplayers_linux/audioplayers_linux_plugin.h>
 #include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) audioplayers_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "AudioplayersLinuxPlugin");
+  audioplayers_linux_plugin_register_with_registrar(audioplayers_linux_registrar);
   g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
   url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);

CHALLENGE_2/sleepysound/linux/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  audioplayers_linux
   url_launcher_linux
 )
 

CHALLENGE_2/sleepysound/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,15 +5,19 @@
 import FlutterMacOS
 import Foundation
 
+import audioplayers_darwin
 import connectivity_plus
 import network_info_plus
+import path_provider_foundation
 import shared_preferences_foundation
 import url_launcher_macos
 import webview_flutter_wkwebview
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  AudioplayersDarwinPlugin.register(with: registry.registrar(forPlugin: "AudioplayersDarwinPlugin"))
   ConnectivityPlusPlugin.register(with: registry.registrar(forPlugin: "ConnectivityPlusPlugin"))
   NetworkInfoPlusPlugin.register(with: registry.registrar(forPlugin: "NetworkInfoPlusPlugin"))
+  PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   UrlLauncherPlugin.register(with: registry.registrar(forPlugin: "UrlLauncherPlugin"))
   WebViewFlutterPlugin.register(with: registry.registrar(forPlugin: "WebViewFlutterPlugin"))

CHALLENGE_2/sleepysound/pubspec.lock

@@ -33,6 +33,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.12.0"
+  audioplayers:
+    dependency: "direct main"
+    description:
+      name: audioplayers
+      sha256: e653f162ddfcec1da2040ba2d8553fff1662b5c2a5c636f4c21a3b11bee497de
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.5.0"
+  audioplayers_android:
+    dependency: transitive
+    description:
+      name: audioplayers_android
+      sha256: "60a6728277228413a85755bd3ffd6fab98f6555608923813ce383b190a360605"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.2.1"
+  audioplayers_darwin:
+    dependency: transitive
+    description:
+      name: audioplayers_darwin
+      sha256: "0811d6924904ca13f9ef90d19081e4a87f7297ddc19fc3d31f60af1aaafee333"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.0"
+  audioplayers_linux:
+    dependency: transitive
+    description:
+      name: audioplayers_linux
+      sha256: f75bce1ce864170ef5e6a2c6a61cd3339e1a17ce11e99a25bae4474ea491d001
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.2.1"
+  audioplayers_platform_interface:
+    dependency: transitive
+    description:
+      name: audioplayers_platform_interface
+      sha256: "0e2f6a919ab56d0fec272e801abc07b26ae7f31980f912f24af4748763e5a656"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.1.1"
+  audioplayers_web:
+    dependency: transitive
+    description:
+      name: audioplayers_web
+      sha256: "1c0f17cec68455556775f1e50ca85c40c05c714a99c5eb1d2d57cc17ba5522d7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.1"
+  audioplayers_windows:
+    dependency: transitive
+    description:
+      name: audioplayers_windows
+      sha256: "4048797865105b26d47628e6abb49231ea5de84884160229251f37dfcbe52fd7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.2.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -464,6 +520,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider:
+    dependency: transitive
+    description:
+      name: path_provider
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.5"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: d0d310befe2c8ab9e7f393288ccbb11b60c019c6b5afc21973eeee4dda2b35e9
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.17"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "4843174df4d288f5e29185bd6e72a6fbdf5a4a4602717eed565497429f179942"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   path_provider_linux:
     dependency: transitive
     description:
@@ -645,6 +725,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.1"
+  sprintf:
+    dependency: transitive
+    description:
+      name: sprintf
+      sha256: "1fc9ffe69d4df602376b52949af107d8f5703b77cda567c4d7d86a0693120f23"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   stack_trace:
     dependency: transitive
     description:
@@ -677,6 +765,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.1"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      sha256: "0669c70faae6270521ee4f05bffd2919892d42d1276e6c495be80174b6bc0ef6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.3.1"
   term_glyph:
     dependency: transitive
     description:
@@ -773,6 +869,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.4"
+  uuid:
+    dependency: transitive
+    description:
+      name: uuid
+      sha256: a5be9ef6618a7ac1e964353ef476418026db906c4facdedaa299b7a2e71690ff
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.5.1"
   vector_math:
     dependency: transitive
     description:

CHALLENGE_2/sleepysound/pubspec.yaml

@@ -59,6 +59,9 @@ dependencies:
   
   # Local network discovery
   multicast_dns: ^0.3.2+4
+  
+  # Audio playback
+  audioplayers: ^6.0.0
 
 dev_dependencies:
   flutter_test:
@@ -87,7 +90,8 @@ flutter:
   uses-material-design: true
 
   # To add assets to your application, add an assets section, like this:
-  # assets:
+  assets:
+    - assets/audio/
   #   - images/a_dot_burr.jpeg
   #   - images/a_dot_ham.jpeg
 

CHALLENGE_2/sleepysound/windows/flutter/generated_plugin_registrant.cc

@@ -6,10 +6,13 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <audioplayers_windows/audioplayers_windows_plugin.h>
 #include <connectivity_plus/connectivity_plus_windows_plugin.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  AudioplayersWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("AudioplayersWindowsPlugin"));
   ConnectivityPlusWindowsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("ConnectivityPlusWindowsPlugin"));
   UrlLauncherWindowsRegisterWithRegistrar(

CHALLENGE_2/sleepysound/windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  audioplayers_windows
   connectivity_plus
   url_launcher_windows
 )