104 lines
3.0 KiB
Dart
104 lines
3.0 KiB
Dart
// lib/services/gnss/phone_gps_connection.dart
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import 'dart:async';
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import 'dart:typed_data';
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import 'package:geolocator/geolocator.dart';
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import 'gnss_connection.dart';
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import 'gnss_device_service.dart';
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class PhoneGpsConnection implements GnssConnection {
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@override
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GnssConnectionType get type => GnssConnectionType.phoneGps;
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final _stateController = StreamController<GnssConnectionState>.broadcast();
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final _positionController = StreamController<Position>.broadcast();
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StreamSubscription<Position>? _positionSub;
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int _retryCount = 0;
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static const _maxRetries = 5;
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Timer? _retryTimer;
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@override
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Stream<String> get nmeaLines => const Stream.empty(); // Nincs NMEA
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@override
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Stream<Position> get positionStream => _positionController.stream;
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@override
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Stream<GnssConnectionState> get connectionState => _stateController.stream;
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@override
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Future<void> connect(String address) async {
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_stateController.add(GnssConnectionState.connecting);
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bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
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if (!serviceEnabled) {
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_stateController.add(GnssConnectionState.error);
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return;
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}
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LocationPermission permission = await Geolocator.checkPermission();
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if (permission == LocationPermission.denied) {
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permission = await Geolocator.requestPermission();
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if (permission == LocationPermission.denied) {
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_stateController.add(GnssConnectionState.error);
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return;
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}
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}
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_stateController.add(GnssConnectionState.connected);
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_retryCount = 0;
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await _startPositionStream();
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}
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Future<void> _startPositionStream() async {
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await _positionSub?.cancel();
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_positionSub = Geolocator.getPositionStream(
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locationSettings: const LocationSettings(
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accuracy: LocationAccuracy.high,
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distanceFilter: 0, // Folyamatos frissítés
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),
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).listen(
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(Position pos) {
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_retryCount = 0;
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_positionController.add(pos);
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},
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onError: _handleStreamError,
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onDone: () =>
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_handleStreamError(Exception('A GPS-stream váratlanul lezárult.')),
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);
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}
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/// A Geolocator stream NEM öngyógyuló — lásd a PhoneGpsSource-nál már
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/// javított, ugyanilyen hibát. Ez a kapcsolat idáig SEMMILYEN hiba
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/// esetén nem próbálkozott újra, csendben, véglegesen elhallgatott.
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void _handleStreamError(Object e) {
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_retryCount++;
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if (_retryCount > _maxRetries) {
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_stateController.add(GnssConnectionState.error);
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return;
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}
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_retryTimer?.cancel();
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_retryTimer = Timer(const Duration(seconds: 1), _startPositionStream);
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}
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@override
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Future<void> disconnect() async {
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_retryTimer?.cancel();
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await _positionSub?.cancel();
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_stateController.add(GnssConnectionState.disconnected);
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}
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@override
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void sendData(Uint8List data) {
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// A telefon beépített GPS-e nem fogad RTCM adatokat
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}
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@override
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void dispose() {
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_retryTimer?.cancel();
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_positionSub?.cancel();
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_positionController.close();
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_stateController.close();
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}
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}
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