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Configuration error
Configuration error
File size: 4,339 Bytes
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library;
import 'dart:async';
import 'dart:convert';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:web_socket_channel/web_socket_channel.dart';
import 'package:smart_attendance_app/core/constants.dart';
import 'package:smart_attendance_app/data/local/secure_storage.dart';
import 'package:smart_attendance_app/domain/enums/auth_state.dart';
import 'package:smart_attendance_app/features/auth/providers/auth_provider.dart';
import 'package:smart_attendance_app/utils/logger.dart';
final websocketServiceProvider = Provider<WebSocketService>((ref) {
final service = WebSocketService(
secureStorage: ref.read(secureStorageProvider),
);
final authState = ref.read(authProvider);
if (authState.status == AuthStatus.authenticated) {
service.connect();
}
ref.listen(authProvider, (previous, next) {
if (next.status == AuthStatus.authenticated) {
service.connect();
} else if (next.status == AuthStatus.unauthenticated) {
service.disconnect();
}
});
ref.onDispose(() {
service.dispose();
});
return service;
});
enum WebSocketStatus { disconnected, connecting, connected, error }
class WebSocketService {
final SecureStorageService _secureStorage;
WebSocketChannel? _channel;
StreamSubscription? _subscription;
WebSocketStatus _status = WebSocketStatus.disconnected;
final _messageController = StreamController<Map<String, dynamic>>.broadcast();
Timer? _reconnectTimer;
Timer? _pingTimer;
int _reconnectAttempts = 0;
static const int _maxReconnectAttempts = 5;
static const Duration _reconnectDelay = Duration(seconds: 3);
static const Duration _pingInterval = Duration(seconds: 30);
WebSocketService({required SecureStorageService secureStorage})
: _secureStorage = secureStorage;
WebSocketStatus get status => _status;
Stream<Map<String, dynamic>> get messageStream => _messageController.stream;
Future<void> connect() async {
if (_status == WebSocketStatus.connected || _status == WebSocketStatus.connecting) {
return;
}
_status = WebSocketStatus.connecting;
final token = await _secureStorage.getToken();
if (token == null) {
_status = WebSocketStatus.error;
return;
}
try {
final wsUrl = kApiBaseUrl.replaceFirst('http://', 'ws://').replaceFirst('https://', 'wss://');
final uri = Uri.parse('$wsUrl/ws/connect');
_channel = WebSocketChannel.connect(uri);
_subscription = _channel!.stream.listen(
_onMessage,
onError: _onError,
onDone: _onDone,
cancelOnError: false,
);
await _channel!.ready;
_channel!.sink.add(jsonEncode({'type': 'auth', 'token': token}));
_status = WebSocketStatus.connected;
_reconnectAttempts = 0;
_startPingTimer();
} catch (e) {
AppLogger.error('WebSocket: Connection failed: $e');
_status = WebSocketStatus.error;
_scheduleReconnect();
}
}
void _onMessage(dynamic message) {
try {
final data = jsonDecode(message as String) as Map<String, dynamic>;
_messageController.add(data);
} catch (e) {
AppLogger.error('WebSocket: Failed to parse message: $e');
}
}
void _onError(dynamic error) {
AppLogger.error('WebSocket error: $error');
_status = WebSocketStatus.error;
_scheduleReconnect();
}
void _onDone() {
_status = WebSocketStatus.disconnected;
_pingTimer?.cancel();
_scheduleReconnect();
}
void _scheduleReconnect() {
if (_reconnectAttempts >= _maxReconnectAttempts) {
return;
}
_reconnectTimer?.cancel();
_reconnectAttempts++;
final delay = _reconnectDelay * _reconnectAttempts;
_reconnectTimer = Timer(delay, () {
connect();
});
}
void _startPingTimer() {
_pingTimer?.cancel();
_pingTimer = Timer.periodic(_pingInterval, (timer) {
if (_status == WebSocketStatus.connected) {
try {
_channel?.sink.add(jsonEncode({'type': 'ping'}));
} catch (_) {}
}
});
}
void disconnect() {
_reconnectTimer?.cancel();
_pingTimer?.cancel();
_subscription?.cancel();
_channel?.sink.close();
_status = WebSocketStatus.disconnected;
}
void dispose() {
disconnect();
_messageController.close();
}
}
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