feat(subtitle): handle socket event subtitle

lib/core/websocket/interfaces/socket_emiter_interface.dart

@@ -28,4 +28,5 @@ abstract class SocketEmiter {
   void setScreenSharing(bool isSharing);
   void sendNewSdp(String sdp);
   void leaveRoom(String roomId);
+  void setSubtitle(bool isEnabled);
 }

lib/core/websocket/socket_emiter.dart

@@ -105,5 +105,10 @@ class SocketEmiterImpl extends SocketEmiter {
     _socket?.emit(SocketEvent.publisherRenegotiationCSS, {'sdp': sdp});
   }
 
+  @override
+  void setSubtitle(bool isEnabled) {
+    _socket?.emit(SocketEvent.setSubscribeSubtitleCSS, {'enabled': isEnabled});
+  }
+
   Socket? get _socket => getIt<SocketHandler>().socket;
 }

lib/core/websocket/socket_handler.dart

@@ -242,6 +242,17 @@ class SocketHandlerImpl extends SocketHandler {
           sdp: sdp,
         );
       });
+
+      _socket?.on(SocketEvent.subtitleSSC, (data) {
+        if (data == null) return;
+
+        final participantId = data['participantId'];
+        final content = data['transcription'];
+
+        WaterbusSdk.onSubtitle?.call(
+          Subtitle(participant: participantId, content: content),
+        );
+      });
     });
   }
 

lib/flutter_waterbus_sdk.dart

@@ -21,15 +21,20 @@ class WaterbusSdk {
   static String apiKey = '';
   static Function(CallbackPayload)? onEventChanged;
   static Function(VideoSenderStats)? onStatsChanged;
+  static Function(Subtitle)? onSubtitle;
 
   set onEventChangedRegister(Function(CallbackPayload) onEventChanged) {
     WaterbusSdk.onEventChanged = onEventChanged;
   }
 
-  setStatsChanged(Function(VideoSenderStats)? onStatsChanged) {
+  set setStatsChanged(Function(VideoSenderStats)? onStatsChanged) {
     WaterbusSdk.onStatsChanged = onStatsChanged;
   }
 
+  set setOnSubtitle(Function(Subtitle)? onSubtitle) {
+    WaterbusSdk.onSubtitle = onSubtitle;
+  }
+
   Future<void> initializeApp({
     required String wsUrl,
     required String apiUrl,
@@ -127,6 +132,10 @@ class WaterbusSdk {
     await _sdk.toggleSpeakerPhone();
   }
 
+  void setSubscribeSubtitle({bool isEnabled = true}) {
+    _sdk.setSubscribeSubtitle(isEnabled);
+  }
+
   Future<void> changeCallSetting(CallSetting setting) async {
     await _sdk.changeCallSettings(setting);
   }

lib/types/models/index.dart

@@ -12,3 +12,4 @@ export 'avatar_model.dart';
 export 'beauty_filters.dart';
 export 'auth_payload_model.dart';
 export 'media_source.dart';
+export 'subtitle.dart';

lib/types/models/subtitle.dart

@@ -0,0 +1,52 @@
+import 'dart:convert';
+
+class Subtitle {
+  final String participant;
+  final String content;
+  Subtitle({
+    required this.participant,
+    required this.content,
+  });
+
+  Subtitle copyWith({
+    String? participant,
+    String? content,
+  }) {
+    return Subtitle(
+      participant: participant ?? this.participant,
+      content: content ?? this.content,
+    );
+  }
+
+  Map<String, dynamic> toMap() {
+    return <String, dynamic>{
+      'participant': participant,
+      'content': content,
+    };
+  }
+
+  factory Subtitle.fromMap(Map<String, dynamic> map) {
+    return Subtitle(
+      participant: map['participant'] as String,
+      content: map['content'] as String,
+    );
+  }
+
+  String toJson() => json.encode(toMap());
+
+  factory Subtitle.fromJson(String source) =>
+      Subtitle.fromMap(json.decode(source) as Map<String, dynamic>);
+
+  @override
+  String toString() => 'Subtitle(participant: $participant, content: $content)';
+
+  @override
+  bool operator ==(covariant Subtitle other) {
+    if (identical(this, other)) return true;
+
+    return other.participant == participant && other.content == content;
+  }
+
+  @override
+  int get hashCode => participant.hashCode ^ content.hashCode;
+}

lib/waterbus_sdk_impl.dart

@@ -8,6 +8,7 @@ import 'package:waterbus_sdk/core/api/base/base_remote_data.dart';
 import 'package:waterbus_sdk/core/api/meetings/repositories/meeting_repository.dart';
 import 'package:waterbus_sdk/core/api/user/repositories/user_repository.dart';
 import 'package:waterbus_sdk/core/webrtc/webrtc_interface.dart';
+import 'package:waterbus_sdk/core/websocket/interfaces/socket_emiter_interface.dart';
 import 'package:waterbus_sdk/core/websocket/interfaces/socket_handler_interface.dart';
 import 'package:waterbus_sdk/flutter_waterbus_sdk.dart';
 import 'package:waterbus_sdk/native/picture-in-picture/index.dart';
@@ -20,6 +21,7 @@ import 'package:waterbus_sdk/waterbus_sdk_interface.dart';
 @Singleton(as: WaterbusSdkInterface)
 class SdkCore extends WaterbusSdkInterface {
   final SocketHandler _webSocket;
+  final SocketEmiter _socketEmiter;
   final WaterbusWebRTCManager _rtcManager;
   final ReplayKitChannel _replayKitChannel;
 
@@ -30,6 +32,7 @@ class SdkCore extends WaterbusSdkInterface {
   final WaterbusLogger _logger;
   SdkCore(
     this._webSocket,
+    this._socketEmiter,
     this._rtcManager,
     this._replayKitChannel,
     this._baseRepository,
@@ -177,6 +180,11 @@ class SdkCore extends WaterbusSdkInterface {
     await _rtcManager.toggleSpeakerPhone();
   }
 
+  @override
+  void setSubscribeSubtitle(bool isEnabled) {
+    _socketEmiter.setSubtitle(isEnabled);
+  }
+
   @override
   Future<void> startScreenSharing({DesktopCapturerSource? source}) async {
     if (WebRTC.platformIsIOS) {

lib/waterbus_sdk_interface.dart

@@ -47,6 +47,7 @@ abstract class WaterbusSdkInterface {
   Future<void> toggleVideo();
   Future<void> toggleAudio();
   Future<void> toggleSpeakerPhone();
+  void setSubscribeSubtitle(bool isEnabled);
   Future<void> startScreenSharing({DesktopCapturerSource? source});
   Future<void> stopScreenSharing();
   Future<void> enableVirtualBackground({