first commit

lib/features/music/data/services/music_service.dart

@@ -0,0 +1,84 @@
+import 'dart:math';
+import 'dart:typed_data';
+
+import 'package:supabase_flutter/supabase_flutter.dart';
+
+import '../../domain/models/track_model.dart';
+
+class MusicService {
+  const MusicService(this._client);
+
+  final SupabaseClient _client;
+
+  User get _currentUser {
+    final user = _client.auth.currentUser;
+    if (user == null) {
+      throw StateError('No authenticated user');
+    }
+    return user;
+  }
+
+  /// Uploads a new track with an MP3 file and metadata.
+  Future<void> uploadTrack({
+    required Uint8List bytes,
+    required String title,
+    required String genreTag,
+    required String extension,
+  }) async {
+    final user = _currentUser;
+    final ts = DateTime.now().millisecondsSinceEpoch;
+    final random = Random().nextInt(99999);
+    final fileName = '$ts-$random.$extension';
+    final path = 'tracks/${user.id}/$fileName';
+
+    // Upload audio to Supabase Storage
+    await _client.storage.from('tracks').uploadBinary(
+          path,
+          bytes,
+          fileOptions: const FileOptions(upsert: false),
+        );
+
+    final audioUrl = _client.storage.from('tracks').getPublicUrl(path);
+
+    // Insert track record into PostgreSQL
+    await _client.from('tracks').insert({
+      'user_id': user.id,
+      'title': title.trim().isEmpty ? 'UNTITLED' : title.trim().toUpperCase(),
+      'audio_url': audioUrl,
+      'genre_tag': genreTag.trim().isEmpty ? 'UNKNOWN' : genreTag.trim().toUpperCase(),
+      'plays': 0,
+    });
+  }
+
+  /// Lists all tracks in chronological order.
+  Future<List<TrackModel>> fetchTracks() async {
+    final response = await _client
+        .from('tracks')
+        .select('*, profiles(username)')
+        .order('created_at', ascending: false);
+
+    return List<Map<String, dynamic>>.from(response).map((row) {
+      final username = (row['profiles'] as Map<String, dynamic>?)?['username'] as String?;
+      return TrackModel.fromJson(row, username: username);
+    }).toList();
+  }
+
+  /// Increments the play count of a track.
+  Future<void> incrementPlays(String trackId) async {
+    await _client.rpc('increment_track_plays', params: {'track_id': trackId});
+  }
+
+  /// Fetches tracks for a specific user.
+  Future<List<TrackModel>> fetchUserTracks(String userId) async {
+    final response = await _client
+        .from('tracks')
+        .select('*, profiles(username)')
+        .eq('user_id', userId)
+        .order('created_at', ascending: false);
+
+    return List<Map<String, dynamic>>.from(response).map((row) {
+      final username = (row['profiles'] as Map<String, dynamic>?)?['username'] as String?;
+      return TrackModel.fromJson(row, username: username);
+    }).toList();
+  }
+}