chore(android) clean up android files sending

example/lib/main.dart

@@ -395,12 +395,17 @@ class AppService extends ChangeNotifier {
     final filesListener = NearbyServiceFilesListener(
       onData: (event) async {
         final files = <File>[];
+        final directory = Directory(
+          'storage/emulated/0/Download',
+        );
+
         for (final nearbyFile in event) {
-          final content = nearbyFile.info;
-          final downloadsDir = Directory('storage/emulated/0/Download');
           final newFile = await nearbyFile.file.copy(
-            '${downloadsDir.path}/${DateTime.now().microsecondsSinceEpoch}.${content.extension}',
+            '${directory.path}/${DateTime.now().microsecondsSinceEpoch}.${nearbyFile.info.extension}',
           );
+          if (!await newFile.exists()) {
+            await newFile.create();
+          }
           files.add(newFile);
         }
         onFilesSaved?.call(files);
@@ -436,22 +441,27 @@ class AppService extends ChangeNotifier {
     if (connectedDevice == null) return;
     _nearbyService.send(
       OutgoingNearbyMessage(
-        content: NearbyMessageFileRequest(
+        content: NearbyMessageFilesRequest(
-          files: [...paths.map((e) => NearbyFileInfo(path: e))],
+          files: [
+            ...paths.map((e) => NearbyFileInfo(path: e)),
+          ],
         ),
         receiver: connectedDevice!.info,
       ),
     );
   }
 
-  void sendFilesAccept(NearbyMessageFileRequest request) {
+  void sendFilesResponse(
+    NearbyMessageFilesRequest request, {
+    required bool response,
+  }) {
     if (connectedDevice == null) return;
     _nearbyService.send(
       OutgoingNearbyMessage(
         receiver: connectedDevice!.info,
-        content: NearbyMessageFileResponse.fromRequest(
+        content: NearbyMessageFilesResponse.fromRequest(
           request,
-          response: true,
+          response: response,
         ),
       ),
     );
@@ -827,17 +837,27 @@ class _ConnectedBody extends StatelessWidget {
           subtitle: senderSubtitle,
         );
       },
-      onFileRequest: (content) {
+      onFilesRequest: (content) {
         ActionDialog.show(
           context,
           title: 'Files request. Files count: ${content.files.length}',
           subtitle: senderSubtitle,
         ).then((value) {
-          if (value == true) {
+          if (value is bool) {
-            context.read<AppService>().sendFilesAccept(content);
+            context.read<AppService>().sendFilesResponse(
+                  content,
+                  response: value,
+                );
           }
         });
       },
+      onFilesResponse: (content) {
+        AppShackBar.show(
+          Scaffold.of(context).context,
+          content.response ? 'Request is accepted!' : 'Request was denied :(',
+          subtitle: senderSubtitle,
+        );
+      },
     );
   }
 

lib/src/models/nearby_file.dart

@@ -6,7 +6,9 @@ import 'package:nearby_service/nearby_service.dart';
 /// communication channel.
 ///
 /// From the communication channel, you usually get
-/// the [NearbyMessageFileRequest] request first. After that, you get [NearbyFile].
+/// the [NearbyMessageFilesRequest] request first.
+/// After that, you can send positive [NearbyMessageFilesResponse] and
+/// get the list of [NearbyFile].
 ///
 class NearbyFile {
   ///
@@ -44,8 +46,14 @@ class NearbyFile {
   }
 }
 
+///
+/// Quick info about the file
+///
 class NearbyFileInfo {
-  const NearbyFileInfo({required this.path, this.sizeBytes});
+  ///
+  /// Contains the file [path] to get the file from it.
+  ///
+  const NearbyFileInfo({required this.path});
 
   factory NearbyFileInfo.fromJson(Map<String, dynamic>? json) {
     return NearbyFileInfo(
@@ -53,8 +61,10 @@ class NearbyFileInfo {
     );
   }
 
+  ///
+  /// Path of the representing file
+  ///
   final String path;
-  final int? sizeBytes;
 
   @override
   bool operator ==(Object other) =>
@@ -72,14 +82,20 @@ class NearbyFileInfo {
     };
   }
 
+  ///
+  /// Quick access to the file [name]
+  ///
   String get name {
     try {
       return path.split('/').last;
     } catch (e) {
-      throw NearbyServiceException('Can\'t get fileName from $path');
+      return path;
     }
   }
 
+  ///
+  /// Quick access to the file [extension]
+  ///
   String get extension {
     try {
       return name.split('.').last;

lib/src/models/nearby_message_content.dart

@@ -5,13 +5,14 @@ import 'package:nearby_service/src/utils/random.dart';
 /// Type of the message.
 ///
 /// If [text], it will be a text message.
-/// If [fileRequest], it will be a file request. After accepting request,
+/// If [filesRequest], it will be a files pack request.
-/// user can get file stream from connected device.
+/// After accepting the request,
+/// user can get files bytes stream from connected device.
 ///
 enum NearbyMessageContentType {
   text,
-  fileRequest,
+  filesRequest,
-  fileResponse;
+  filesResponse;
 
   ///
   /// Checks if this is [NearbyMessageContentType.text]
@@ -21,17 +22,17 @@ enum NearbyMessageContentType {
   }
 
   ///
-  /// Checks if this is [NearbyMessageContentType.fileRequest]
+  /// Checks if this is [NearbyMessageContentType.filesRequest]
   ///
-  bool get isFileRequest {
+  bool get isFilesRequest {
-    return this == NearbyMessageContentType.fileRequest;
+    return this == NearbyMessageContentType.filesRequest;
   }
 
   ///
-  /// Checks if this is [NearbyMessageContentType.fileResponse]
+  /// Checks if this is [NearbyMessageContentType.filesResponse]
   ///
-  bool get isFileResponse {
+  bool get isFilesResponse {
-    return this == NearbyMessageContentType.fileResponse;
+    return this == NearbyMessageContentType.filesResponse;
   }
 }
 
@@ -43,20 +44,21 @@ abstract class NearbyMessageContent {
   const NearbyMessageContent(this._type);
 
   ///
-  /// Contains the conditional logic of creating [NearbyMessageFileRequest]
+  /// Contains the conditional logic of creating [NearbyMessageFilesRequest],
-  /// or [NearbyMessageTextContent] by `type` field of [json].
+  /// [NearbyMessageFilesResponse] or [NearbyMessageTextContent]
+  /// by `type` field of [json].
   ///
   factory NearbyMessageContent.fromJson(Map<String, dynamic>? json) {
     try {
       final type = NearbyMessageContentType.values.firstWhere(
         (e) => e.name == json?['type'],
       );
-      if (type.isFileRequest) {
+      if (type.isText) {
-        return NearbyMessageFileRequest.fromJson(json);
-      } else if (type.isText) {
         return NearbyMessageTextContent.fromJson(json);
-      } else if (type.isFileResponse) {
+      } else if (type.isFilesRequest) {
-        return NearbyMessageFileResponse.fromJson(json);
+        return NearbyMessageFilesRequest.fromJson(json);
+      } else if (type.isFilesResponse) {
+        return NearbyMessageFilesResponse.fromJson(json);
       } else {
         throw NearbyServiceException.unsupportedDecoding(json);
       }
@@ -76,23 +78,23 @@ abstract class NearbyMessageContent {
   /// * The [onText] callback returns this instance of [NearbyMessageContent],
   /// cast as [NearbyMessageTextContent] if is a text.
   ///
-  /// * The [onFileRequest] callback returns this instance of [NearbyMessageContent],
+  /// * The [onFilesRequest] callback returns this instance of [NearbyMessageContent],
-  /// cast as [NearbyMessageFileRequest] if is a file request.
+  /// cast as [NearbyMessageFilesRequest] if is a files pack request.
   ///
-  /// * The [onFileResponse] callback returns this instance of [NearbyMessageContent],
+  /// * The [onFilesResponse] callback returns this instance of [NearbyMessageContent],
-  /// cast as [NearbyMessageFileResponse] if is a file response.
+  /// cast as [NearbyMessageFilesResponse] if is a files pack response.
   ///
   T? byType<T>({
     T Function(NearbyMessageTextContent)? onText,
-    T Function(NearbyMessageFileRequest)? onFileRequest,
+    T Function(NearbyMessageFilesRequest)? onFilesRequest,
-    T Function(NearbyMessageFileResponse)? onFileResponse,
+    T Function(NearbyMessageFilesResponse)? onFilesResponse,
   }) {
     if (this is NearbyMessageTextContent && onText != null) {
       return onText(this as NearbyMessageTextContent);
-    } else if (this is NearbyMessageFileRequest && onFileRequest != null) {
+    } else if (this is NearbyMessageFilesRequest && onFilesRequest != null) {
-      return onFileRequest(this as NearbyMessageFileRequest);
+      return onFilesRequest(this as NearbyMessageFilesRequest);
-    } else if (this is NearbyMessageFileResponse && onFileResponse != null) {
+    } else if (this is NearbyMessageFilesResponse && onFilesResponse != null) {
-      return onFileResponse(this as NearbyMessageFileResponse);
+      return onFilesResponse(this as NearbyMessageFilesResponse);
     }
     return null;
   }
@@ -157,15 +159,31 @@ class NearbyMessageTextContent extends NearbyMessageContent {
   }
 }
 
-abstract class NearbyMessageFilesContent extends NearbyMessageContent {
+///
+/// Sealed class for files content in NearbyMessage.
+///
+sealed class NearbyMessageFilesContent extends NearbyMessageContent {
+  ///
+  /// Here [_type] = [NearbyMessageContentType.filesResponse] or
+  /// [_type] =  [NearbyMessageContentType.filesRequest]
+  ///
+  /// Also [NearbyMessageFilesContent] contains [id] of the files pack and
+  /// list of [NearbyFileInfo] to determine the files.
+  ///
   const NearbyMessageFilesContent(
     super.type, {
     required this.id,
     required this.files,
   });
 
+  ///
+  /// Info about the files to be sent or received.
+  ///
   final List<NearbyFileInfo> files;
 
+  ///
+  /// ID of this files pack
+  ///
   final String id;
 
   @override
@@ -179,6 +197,13 @@ abstract class NearbyMessageFilesContent extends NearbyMessageContent {
     };
   }
 
+  @override
+  bool get isValid =>
+      files.isNotEmpty &&
+      files.every(
+        (element) => element.path.isNotEmpty,
+      );
+
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
@@ -197,31 +222,31 @@ abstract class NearbyMessageFilesContent extends NearbyMessageContent {
 }
 
 ///
-/// Nearby message File content. Used for file sending requests.
+/// Nearby message File Request. Used for file sending requests.
-/// Does not contain file bytes!
+/// Does not contain files' bytes!
 ///
-class NearbyMessageFileRequest extends NearbyMessageFilesContent {
+class NearbyMessageFilesRequest extends NearbyMessageFilesContent {
-  const NearbyMessageFileRequest._({
+  const NearbyMessageFilesRequest._({
     required super.id,
     required super.files,
   }) : super(
-          NearbyMessageContentType.fileRequest,
+          NearbyMessageContentType.filesRequest,
         );
 
   ///
   /// Basic constructor with [files] to be sent or received.
   ///
-  NearbyMessageFileRequest({required super.files})
+  NearbyMessageFilesRequest({required super.files})
       : super(
-          NearbyMessageContentType.fileRequest,
+          NearbyMessageContentType.filesRequest,
           id: RandomUtils.instance.nextInt(1000000, 9999999).toString(),
         );
 
   ///
-  /// Gets [NearbyMessageFileRequest] from [json].
+  /// Gets [NearbyMessageFilesRequest] from [json].
   ///
-  factory NearbyMessageFileRequest.fromJson(Map<String, dynamic>? json) {
+  factory NearbyMessageFilesRequest.fromJson(Map<String, dynamic>? json) {
-    return NearbyMessageFileRequest._(
+    return NearbyMessageFilesRequest._(
       id: json?['id'] ?? '',
       files: [
         ...?(json?['files'] as List?)?.map(
@@ -231,37 +256,50 @@ class NearbyMessageFileRequest extends NearbyMessageFilesContent {
     );
   }
 
-  @override
-  bool get isValid => files.every((element) => element.path.isNotEmpty);
-
   @override
   String toString() {
     return 'NearbyMessageFileRequest{id: $id, files: $files}';
   }
 }
 
-class NearbyMessageFileResponse extends NearbyMessageFilesContent {
+///
-  NearbyMessageFileResponse({
+/// Nearby message File Response. Used for file sending responses.
+/// Does not contain files' bytes!
+///
+class NearbyMessageFilesResponse extends NearbyMessageFilesContent {
+  ///
+  /// Used to send a response to a previously received request.
+  /// Provide [id] and [files] from [NearbyMessageFilesRequest] or
+  /// Use the [NearbyMessageFilesResponse.fromRequest] factory to generate a
+  /// response.
+  ///
+  NearbyMessageFilesResponse({
     required super.id,
     required super.files,
     required this.response,
   }) : super(
-          NearbyMessageContentType.fileResponse,
+          NearbyMessageContentType.filesResponse,
         );
 
-  factory NearbyMessageFileResponse.fromRequest(
+  ///
-    NearbyMessageFileRequest request, {
+  /// Factory to quickly create a response to [NearbyMessageFilesRequest].
+  ///
+  factory NearbyMessageFilesResponse.fromRequest(
+    NearbyMessageFilesRequest request, {
     required bool response,
   }) {
-    return NearbyMessageFileResponse(
+    return NearbyMessageFilesResponse(
       id: request.id,
       files: request.files,
       response: response,
     );
   }
 
-  factory NearbyMessageFileResponse.fromJson(Map<String, dynamic>? json) {
+  ///
-    return NearbyMessageFileResponse(
+  /// Gets [NearbyMessageFilesResponse] from [Map]
+  ///
+  factory NearbyMessageFilesResponse.fromJson(Map<String, dynamic>? json) {
+    return NearbyMessageFilesResponse(
       id: json?['id'] ?? '',
       files: [
         ...?(json?['files'] as List?)?.map(
@@ -272,11 +310,11 @@ class NearbyMessageFileResponse extends NearbyMessageFilesContent {
     );
   }
 
+  ///
+  /// The main response to the received [NearbyMessageFilesRequest].
+  ///
   final bool response;
 
-  @override
-  bool get isValid => files.every((element) => element.path.isNotEmpty);
-
   @override
   Map<String, dynamic> toJson() {
     return {

lib/src/platforms/android/socket_service/file_sockets_manager.dart

@@ -1,12 +1,14 @@
 part of 'nearby_socket_service.dart';
 
 class FileSocketsManager {
-  FileSocketsManager(this._network, this._service);
+  FileSocketsManager(this._network, this._service, this._pingManager);
 
   final NearbyServiceNetwork _network;
   final NearbyAndroidService _service;
-  final _filesSockets = <FilesSocket>[];
+  final NearbySocketPingManager _pingManager;
-  final _serverWaitingContents = <String, HttpRequest>{};
+
+  final _filesSockets = <String, FilesSocket>{};
+  final _serverWaitingRequests = <String, HttpRequest>{};
 
   NearbyServiceFilesListener? _filesListener;
 
@@ -16,9 +18,9 @@ class FileSocketsManager {
 
   void onWsRequest(HttpRequest request) {
     final type = NearbySocketType.fromRequest(request);
-    final fileId = NearbyFileId.fromRequest(request);
+    final filesPackId = NearbyFilesPackId.fromRequest(request);
-    if (type == NearbySocketType.file && fileId != null) {
+    if (type == NearbySocketType.file && filesPackId != null) {
-      _serverWaitingContents[fileId] = request;
+      _serverWaitingRequests[filesPackId] = request;
     }
   }
 
@@ -27,114 +29,124 @@ class FileSocketsManager {
     required NearbyAndroidCommunicationChannelData androidData,
     required bool isReceived,
   }) async {
-    final info = await _service.getConnectionInfo();
+    final shouldStartSocket = content.byType(
-    if (info != null && info.groupFormed) {
+          onFilesResponse: (response) => response.response,
-      if (info.isGroupOwner) {
+          onFilesRequest: (_) => true,
-        await _handleServerFileContent(content);
+        ) ??
-        if (content is NearbyMessageFileResponse && isReceived) {
+        false;
-          await _tryTransferData(content);
+
-        }
+    if (shouldStartSocket) {
-      } else {
+      final info = await _service.getConnectionInfo();
-        await _handleClientFileContent(
+      if (info != null && info.groupFormed) {
-          content,
+        if (info.isGroupOwner) {
-          connectionData: androidData,
+          await _startFilesServer(content);
-          ownerIpAddress: info.ownerIpAddress,
+          if (content is NearbyMessageFilesResponse && isReceived) {
-        );
+            await _tryTransferData(content);
-        if (content is NearbyMessageFileRequest && !isReceived) {
+          }
-          await _tryTransferData(content);
+        } else {
+          await _connectToFilesSocket(
+            content,
+            connectionData: androidData,
+            ownerIpAddress: info.ownerIpAddress,
+          );
+          if (content is NearbyMessageFilesRequest && !isReceived) {
+            await _tryTransferData(content);
+          }
         }
       }
+    } else {
+      _filesSockets.remove(content.id);
     }
   }
 
   Future<void> closeAll() async {
-    for (final fileSocket in _filesSockets) {
+    for (final fileSocket in _filesSockets.values) {
       await fileSocket.close();
     }
     _filesSockets.clear();
     _filesListener = null;
   }
 
-  Future<void> _handleClientFileContent(
+  Future<void> _connectToFilesSocket(
     NearbyMessageFilesContent content, {
     required NearbyAndroidCommunicationChannelData connectionData,
     required String ownerIpAddress,
   }) async {
     try {
-      final shouldStartFileSocket = content.byType(
+      final response = await _network.pingServer(
-            onFileResponse: (response) => response.response,
+        address: ownerIpAddress,
-            onFileRequest: (request) => true,
+        port: connectionData.port,
-          ) ??
+      );
-          false;
+      if (await _pingManager.checkPong(response)) {
-      if (shouldStartFileSocket) {
+        await _tryStartFileSocket(
-        final socket = await _network.connectToSocket(
+          content,
-          ownerIpAddress: ownerIpAddress,
+          onCreateSocket: () => _network.connectToSocket(
-          port: connectionData.port,
+            ownerIpAddress: ownerIpAddress,
-          socketType: NearbySocketType.file,
+            port: connectionData.port,
-          headers: {
+            socketType: NearbySocketType.file,
-            NearbyFileId.key: content.id,
+            headers: {
-          },
+              NearbyFilesPackId.key: content.id,
+            },
+          ),
+        );
+      } else {
+        Logger.debug(
+          'Files server is unavailable, reconnect in ${connectionData.clientReconnectInterval}s',
+        );
+        await Future.delayed(
+          connectionData.clientReconnectInterval,
+          () => _connectToFilesSocket(
+            content,
+            connectionData: connectionData,
+            ownerIpAddress: ownerIpAddress,
+          ),
         );
-
-        if (socket != null) {
-          _filesSockets.add(
-            FilesSocket.startListening(
-              content: content,
-              socket: socket,
-              listener: _filesListener,
-              onDestroy: _filesSockets.remove,
-            ),
-          );
-          Logger.info(
-            'The file socket was created for the files pack ${content.id}',
-          );
-        } else {
-          await Future.delayed(
-            connectionData.clientReconnectInterval,
-            () => _handleClientFileContent(
-              content,
-              connectionData: connectionData,
-              ownerIpAddress: ownerIpAddress,
-            ),
-          );
-        }
       }
     } catch (e) {
       Logger.error(e);
     }
   }
 
-  Future<void> _handleServerFileContent(
+  Future<void> _startFilesServer(
     NearbyMessageFilesContent content,
   ) async {
-    MapEntry<String, HttpRequest>? request;
+    final request = _serverWaitingRequests[content.id];
-    try {
-      request = _serverWaitingContents.entries.firstWhere(
-        (element) => element.key == content.id,
-      );
-    } catch (e) {
-      request = null;
-    }
 
     if (request != null) {
-      Logger.debug('Found cached server file request ${request.key}');
+      Logger.debug('Found cached server file request ${content.id}');
-      _filesSockets.add(
+
-        FilesSocket.startListening(
+      final result = await _tryStartFileSocket(
-          content: content,
+        content,
-          socket: await WebSocketTransformer.upgrade(request.value),
+        onCreateSocket: () => WebSocketTransformer.upgrade(request),
-          listener: _filesListener,
-          onDestroy: _filesSockets.remove,
-        ),
       );
-      _serverWaitingContents.remove(content.id);
+      if (result) {
-      Logger.info('Created a socket for the files pack ${content.id}');
+        _serverWaitingRequests.remove(content.id);
+      }
     }
   }
 
+  Future<bool> _tryStartFileSocket(
+    NearbyMessageFilesContent content, {
+    required Future<WebSocket?> Function() onCreateSocket,
+  }) async {
+    final socket = await onCreateSocket();
+    if (socket != null) {
+      _filesSockets[content.id] = FilesSocket.startListening(
+        content: content,
+        socket: socket,
+        listener: _filesListener,
+        onDestroy: _filesSockets.remove,
+      );
+      Logger.info('Created a socket for the files pack ${content.id}');
+      return true;
+    }
+    return false;
+  }
+
   Future<void> _tryTransferData(NearbyMessageFilesContent content) async {
-    Logger.debug('Start transferring the files pack ${content.id}');
+    final filesSocket = _filesSockets[content.id];
-    final filesSocket = _find(content.id);
     if (filesSocket != null) {
+      Logger.debug('Start transferring the files pack ${content.id}');
       for (var i = 0; i < content.files.length; i++) {
         try {
           final fileInfo = content.files[i];
@@ -161,22 +173,6 @@ class FileSocketsManager {
     required FilesSocket filesSocket,
     required File file,
   }) {
-    return file.openRead().listen(
+    return file.openRead().listen(filesSocket.sendData);
-      (data) {
-        filesSocket.sendData(data);
-      },
-    );
-  }
-
-  FilesSocket? _find(String id) {
-    FilesSocket? fileSocket;
-    try {
-      fileSocket = _filesSockets.firstWhere(
-        (element) => element.content.id == id,
-      );
-    } catch (e) {
-      fileSocket = null;
-    }
-    return fileSocket;
   }
 }

lib/src/platforms/android/socket_service/nearby_socket_service.dart

@@ -24,7 +24,11 @@ class NearbySocketService {
   final NearbyAndroidService _service;
   final _pingManager = NearbySocketPingManager();
   final _network = NearbyServiceNetwork();
-  late final _fileSocketsManager = FileSocketsManager(_network, _service);
+  late final _fileSocketsManager = FileSocketsManager(
+    _network,
+    _service,
+    _pingManager,
+  );
 
   final state = ValueNotifier(CommunicationChannelState.notConnected);
 
@@ -77,7 +81,7 @@ class NearbySocketService {
   }
 
   ///
-  /// Add [OutgoingNearbyMessage]'s JSON representation to [_socket].
+  /// Adds [OutgoingNearbyMessage]'s JSON representation to the [_socket].
   ///
   Future<bool> send(OutgoingNearbyMessage message) async {
     if (message.isValid) {
@@ -199,36 +203,22 @@ class NearbySocketService {
     Logger.debug('Starting socket subscription');
 
     if (_connectedDeviceId != null) {
-      _messagesSubscription = _socket?.listen(
+      _messagesSubscription = _socket
-        (event) async {
+          ?.map(MessagesStreamMapper.toMessage)
-          // if (fileLoaders != null) {
+          .where((e) => e != null)
-          //   if (event is List<int>) {
+          .cast<ReceivedNearbyMessage>()
-          //     fileLoaders!.add(event);
+          .map((e) => MessagesStreamMapper.replaceId(e, _connectedDeviceId!))
-          //   } else if (event == fileLoaders?.finishCommand) {
+          .listen(
-          //     final file = await fileLoaders!.getFile().whenComplete(
+        (message) async {
-          //       () {
-          //         fileLoaders = null;
-          //       },
-          //     );
-          //     socketListener.onFile?.call(file);
-          //   }
-          // } else {
           try {
-            final message = MessagesStreamMapper.toMessage(event);
+            if (message.content is NearbyMessageFilesContent) {
-            if (message != null) {
+              _fileSocketsManager.handleFileMessageContent(
-              final newMessage = MessagesStreamMapper.replaceId(
+                message.content as NearbyMessageFilesContent,
-                message,
+                androidData: _androidData,
-                _connectedDeviceId!,
+                isReceived: true,
               );
-              if (newMessage.content is NearbyMessageFilesContent) {
-                _fileSocketsManager.handleFileMessageContent(
-                  newMessage.content as NearbyMessageFilesContent,
-                  androidData: _androidData,
-                  isReceived: true,
-                );
-              }
-              socketListener.onData(newMessage);
             }
+            socketListener.onData(message);
           } catch (e) {
             Logger.error(e);
           }

lib/src/platforms/android/socket_service/network.dart

@@ -101,10 +101,10 @@ enum NearbySocketType {
   }
 }
 
-class NearbyFileId {
+class NearbyFilesPackId {
-  static const key = 'FileID';
+  static const key = 'FilesPackID';
 
   static String? fromRequest(HttpRequest request) {
-    return request.headers.value(NearbyFileId.key);
+    return request.headers.value(NearbyFilesPackId.key);
   }
 }

lib/src/utils/exception.dart

@@ -38,4 +38,9 @@ class NearbyServiceException implements Exception {
   }
 
   final Object? error;
+
+  @override
+  String toString() {
+    return 'NearbyServiceException{error: $error}';
+  }
 }

lib/src/utils/file_socket.dart

@@ -9,25 +9,12 @@ import 'package:path_provider/path_provider.dart';
 class FilesSocket {
   FilesSocket.startListening({
     required this.content,
+    required this.listener,
+    required this.onDestroy,
     required WebSocket socket,
-    required NearbyServiceFilesListener? listener,
-    required void Function(FilesSocket) onDestroy,
   }) : _socket = socket {
     _socket.listen(
-      (event) async {
+      _listener,
-        if (event is List<int>) {
-          addChunk(event);
-        } else if (event == separateCommandOf(_currentFileIndex)) {
-          _futures.add(_createFile(_currentFileIndex));
-          _currentFileIndex = _currentFileIndex + 1;
-          _bytesTable['$_currentFileIndex'] = [];
-        } else if (event == finishCommand) {
-          await Future.wait(_futures);
-          Logger.info('Files pack ${content.id} was created');
-          listener?.onData.call(_files);
-          onDestroy(this);
-        }
-      },
       onError: listener?.onError,
       cancelOnError: listener?.cancelOnError,
       onDone: listener?.onDone,
@@ -35,13 +22,15 @@ class FilesSocket {
     listener?.onCreated?.call();
   }
 
-  static const finishCommand = '_@@FINISH_SENDING_FILE_';
+  static const finishCommand = '_@@FINISH_SENDING_FILES_';
 
   static const separateCommand = '_@@SEPARATE_SENDING_FILE_';
 
   static String separateCommandOf(int index) => '$separateCommand$index';
 
   final NearbyMessageFilesContent content;
+  final void Function(String) onDestroy;
+  final NearbyServiceFilesListener? listener;
 
   final WebSocket _socket;
   final _files = <NearbyFile>[];
@@ -66,6 +55,21 @@ class FilesSocket {
     }
   }
 
+  Future<void> _listener(dynamic event) async {
+    if (event is List<int>) {
+      addChunk(event);
+    } else if (event == separateCommandOf(_currentFileIndex)) {
+      _futures.add(_createFile(_currentFileIndex));
+      _currentFileIndex = _currentFileIndex + 1;
+      _bytesTable['$_currentFileIndex'] = [];
+    } else if (event == finishCommand) {
+      await Future.wait(_futures);
+      Logger.info('Files pack ${content.id} was created');
+      listener?.onData.call(_files);
+      onDestroy(content.id);
+    }
+  }
+
   Future<void> _createFile(int index) async {
     try {
       final bytes = _bytesTable['$index']!;