Source Code added

mobile/lib/repositories/gcast.repository.dart

@@ -0,0 +1,68 @@
+import 'package:cast/device.dart';
+import 'package:cast/session.dart';
+import 'package:cast/session_manager.dart';
+import 'package:cast/discovery_service.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+final gCastRepositoryProvider = Provider((_) {
+  return GCastRepository();
+});
+
+class GCastRepository {
+  CastSession? _castSession;
+
+  void Function(CastSessionState)? onCastStatus;
+  void Function(Map<String, dynamic>)? onCastMessage;
+
+  Map<String, dynamic>? _receiverStatus;
+
+  GCastRepository();
+
+  Future<void> connect(CastDevice device) async {
+    _castSession = await CastSessionManager().startSession(device);
+
+    _castSession?.stateStream.listen((state) {
+      onCastStatus?.call(state);
+    });
+
+    _castSession?.messageStream.listen((message) {
+      onCastMessage?.call(message);
+      if (message['type'] == 'RECEIVER_STATUS') {
+        _receiverStatus = message;
+      }
+    });
+
+    // open the default receiver
+    sendMessage(CastSession.kNamespaceReceiver, {'type': 'LAUNCH', 'appId': 'CC1AD845'});
+  }
+
+  Future<void> disconnect() async {
+    final sessionID = getSessionId();
+
+    sendMessage(CastSession.kNamespaceReceiver, {'type': "STOP", "sessionId": sessionID});
+
+    // wait 500ms to ensure the stop command is processed
+    await Future.delayed(const Duration(milliseconds: 500));
+
+    await _castSession?.close();
+  }
+
+  String? getSessionId() {
+    if (_receiverStatus == null) {
+      return null;
+    }
+    return _receiverStatus!['status']['applications'][0]['sessionId'];
+  }
+
+  void sendMessage(String namespace, Map<String, dynamic> message) {
+    if (_castSession == null) {
+      throw Exception("Cast session is not established");
+    }
+
+    _castSession!.sendMessage(namespace, message);
+  }
+
+  Future<List<CastDevice>> listDestinations() async {
+    return await CastDiscoveryService().search(timeout: const Duration(seconds: 3));
+  }
+}