286 lines
8.8 KiB
Dart
286 lines
8.8 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'dart:io';
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import '../utils/logger.dart';
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import 'conversation_params.dart';
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/// Параметры подключения к сигналинг-сокету ws2.
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///
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/// Строится из двух источников:
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/// - входящий звонок: [Ws2Config.fromVcp] (параметры из `vcp` пуша opcode 137);
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/// - исходящий звонок: [Ws2Config.fromEndpoint] (`endpoint` из ответа opcode 78,
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/// в нём уже вшит токен — дописываем только клиентские параметры).
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class Ws2Config {
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/// Готовый URL подключения к ws2.
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final Uri uri;
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/// Внутренний id пользователя в системе звонков.
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final int userId;
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const Ws2Config({required this.uri, required this.userId});
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static const _defaultCapabilities = '3c03f';
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static const _appVersion = 'sdk-0.1.16.4';
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/// Входящий звонок: из распакованных параметров [ConversationParams].
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/// `userId` — часть после `:` в [ConversationParams.turnUser].
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factory Ws2Config.fromVcp(
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ConversationParams params, {
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required String conversationId,
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String capabilities = _defaultCapabilities,
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String device = 'Komet',
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String osVersion = '36',
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}) {
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final userId =
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int.tryParse((params.turnUser ?? '').split(':').last) ?? 0;
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final uri = Uri.parse(params.wsEndpoint).replace(queryParameters: {
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'userId': '$userId',
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'entityType': 'USER',
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'conversationId': conversationId,
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'token': params.token,
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'version': '5',
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'capabilities': capabilities,
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'device': device,
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'platform': 'ANDROID',
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'clientType': 'ONE_ME',
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'appVersion': _appVersion,
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'osVersion': osVersion,
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});
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return Ws2Config(uri: uri, userId: userId);
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}
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/// Исходящий звонок: `endpoint` из ответа opcode 78 уже содержит токен и
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/// conversationId/userId в query — дописываем клиентские параметры.
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factory Ws2Config.fromEndpoint(
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String endpoint, {
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required int userId,
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String capabilities = _defaultCapabilities,
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String device = 'Komet',
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}) {
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final base = Uri.parse(endpoint);
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final uri = base.replace(queryParameters: {
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...base.queryParameters,
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'platform': 'ANDROID',
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'version': '5',
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'capabilities': capabilities,
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'clientType': 'ONE_ME',
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'appVersion': _appVersion,
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'device': device,
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'tgt': 'start',
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});
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return Ws2Config(uri: uri, userId: userId);
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}
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}
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/// Ошибка, которую вернул сервер в ответе на команду.
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class Ws2CommandException implements Exception {
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final String command;
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final Object? error;
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Ws2CommandException(this.command, this.error);
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@override
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String toString() => 'Ws2CommandException($command): $error';
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}
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/// Клиент сигналинга звонка поверх WebSocket `ws2`.
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///
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/// Конверт сообщений (подтверждено захватом `docs/ws2_capture.log`):
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/// - запрос: `{"command": ..., ..., "sequence": N}`
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/// - ответ: `{"sequence": N, "response": "<command>", "type": "response"}`
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/// - пуш: `{..., "notification": "<name>", "type": "notification"}`
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/// - keepalive: текстовый кадр `ping` → ответ `pong`.
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class Ws2Signaling {
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final Ws2Config config;
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WebSocket? _socket;
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int _sequence = 0;
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final Map<int, Completer<Map<String, dynamic>>> _pending = {};
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final _notifications = StreamController<Map<String, dynamic>>.broadcast();
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final _closed = Completer<Object?>();
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Ws2Signaling(this.config);
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/// Пуши сервера (`type == "notification"`). Фильтруй по полю `notification`.
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Stream<Map<String, dynamic>> get notifications => _notifications.stream;
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/// Завершается, когда сокет закрыт (значение — причина закрытия, если была).
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Future<Object?> get done => _closed.future;
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bool get isConnected => _socket != null;
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Future<void> connect() async {
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final socket = await WebSocket.connect(
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config.uri.toString(),
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headers: {'User-Agent': 'okhttp/4.12.0'},
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);
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_socket = socket;
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socket.listen(
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_onFrame,
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onError: _onDone,
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onDone: () => _onDone(null),
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cancelOnError: false,
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);
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}
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void _onFrame(dynamic frame) {
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if (frame is String && frame == 'ping') {
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_socket?.add('pong');
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return;
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}
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final String text;
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if (frame is String) {
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text = frame;
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} else if (frame is List<int>) {
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text = utf8.decode(frame);
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} else {
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return;
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}
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Object? decoded;
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try {
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decoded = jsonDecode(text);
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} catch (_) {
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return;
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}
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if (decoded is! Map<String, dynamic>) return;
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final label =
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decoded['notification'] ?? decoded['response'] ?? decoded['type'];
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logger.t('[ws2] ← $label');
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logger.t(decoded);
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final type = decoded['type'];
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if (type == 'response') {
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final seq = decoded['sequence'];
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if (seq is int) {
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final completer = _pending.remove(seq);
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if (completer != null && !completer.isCompleted) {
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completer.complete(decoded);
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}
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}
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return;
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}
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if (type == 'notification' || decoded.containsKey('notification')) {
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_notifications.add(decoded);
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}
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}
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void _onDone(Object? error) {
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for (final c in _pending.values) {
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if (!c.isCompleted) c.completeError(error ?? const SocketException('ws2 closed'));
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}
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_pending.clear();
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if (!_closed.isCompleted) _closed.complete(error);
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if (!_notifications.isClosed) _notifications.close();
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}
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/// Отправляет команду и ждёт ответ сервера. Бросает [Ws2CommandException],
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/// если в ответе есть поле `error`.
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Future<Map<String, dynamic>> sendCommand(
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String command, {
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Map<String, dynamic> extra = const {},
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Duration timeout = const Duration(seconds: 15),
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}) {
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final socket = _socket;
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if (socket == null) {
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return Future.error(StateError('ws2 не подключён'));
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}
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final seq = ++_sequence;
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final completer = Completer<Map<String, dynamic>>();
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_pending[seq] = completer;
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socket.add(jsonEncode({'command': command, ...extra, 'sequence': seq}));
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return completer.future.timeout(timeout).then((response) {
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final error = response['error'];
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if (error != null) throw Ws2CommandException(command, error);
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return response;
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});
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}
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/// Передаёт SDP (offer/answer) другому участнику.
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Future<void> transmitSdp({
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required int participantId,
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required String type,
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required String sdp,
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String participantType = 'USER',
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int deviceIdx = 0,
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String capabilities = '1',
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}) {
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return sendCommand(
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'transmit-data',
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extra: {
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'participantId': participantId,
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'participantType': participantType,
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'deviceIdx': deviceIdx,
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'data': {
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'sdp': {'type': type, 'sdp': sdp},
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},
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'capabilities': capabilities,
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},
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);
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}
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/// Передаёт ICE-кандидата другому участнику (trickle).
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Future<void> transmitCandidate({
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required int participantId,
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required String candidate,
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required String sdpMid,
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required int sdpMLineIndex,
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String participantType = 'USER',
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int deviceIdx = 0,
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}) {
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return sendCommand(
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'transmit-data',
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extra: {
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'participantId': participantId,
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'participantType': participantType,
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'deviceIdx': deviceIdx,
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'data': {
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'candidate': {
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'candidate': candidate,
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'sdpMid': sdpMid,
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'sdpMLineIndex': sdpMLineIndex,
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},
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},
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},
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);
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}
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Future<void> changeMediaSettings({
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bool isAudioEnabled = true,
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bool isVideoEnabled = false,
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bool isScreenSharingEnabled = false,
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bool isAnimojiEnabled = false,
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bool isAudioSharingEnabled = false,
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}) {
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return sendCommand(
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'change-media-settings',
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extra: {
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'mediaSettings': {
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'isVideoEnabled': isVideoEnabled,
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'isAudioEnabled': isAudioEnabled,
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'isScreenSharingEnabled': isScreenSharingEnabled,
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'isAnimojiEnabled': isAnimojiEnabled,
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'isAudioSharingEnabled': isAudioSharingEnabled,
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},
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},
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);
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}
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/// Принять входящий звонок (сторона вызываемого).
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Future<void> acceptCall() => sendCommand('accept-call');
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Future<void> hangup({String reason = 'HUNGUP'}) =>
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sendCommand('hangup', extra: {'reason': reason});
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Future<void> close() async {
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await _socket?.close();
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_socket = null;
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}
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}
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