40 lines
1,014 B
Dart
40 lines
1,014 B
Dart
import 'dart:async';
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import 'dart:convert';
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import 'package:web_socket_channel/web_socket_channel.dart';
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class SignallingService {
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WebSocketChannel? _channel;
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final _controller = StreamController<Map<String, dynamic>>.broadcast();
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Stream<Map<String, dynamic>> get messages => _controller.stream;
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void connect(String url) {
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_channel = WebSocketChannel.connect(Uri.parse(url));
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_channel!.stream.listen(
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(data) {
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try {
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final msg = jsonDecode(data as String) as Map<String, dynamic>;
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_controller.add(msg);
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} catch (_) {}
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},
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onError: (err) {
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if (!_controller.isClosed) _controller.addError(err);
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},
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onDone: () {
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if (!_controller.isClosed) _controller.addError(Exception('WebSocket connection closed'));
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},
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);
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}
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void send(Map<String, dynamic> msg) {
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_channel?.sink.add(jsonEncode(msg));
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}
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void dispose() {
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_channel?.sink.close();
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if (!_controller.isClosed) _controller.close();
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}
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}
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