mirror of
https://github.com/FoggedLens/deflock-app.git
synced 2026-02-13 01:03:03 +00:00
356 lines
12 KiB
Dart
356 lines
12 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter_map_animations/flutter_map_animations.dart';
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import 'package:geolocator/geolocator.dart';
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import 'package:latlong2/latlong.dart';
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import '../../dev_config.dart';
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import '../../app_state.dart' show FollowMeMode;
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import '../../services/proximity_alert_service.dart';
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import '../../models/osm_node.dart';
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import '../../models/node_profile.dart';
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/// Simple GPS controller that handles precise location permissions only.
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/// Key principles:
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/// - Respect "denied forever" - stop trying
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/// - Retry "denied" - user might enable later
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/// - Only works with precise location permissions
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class GpsController {
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StreamSubscription<Position>? _positionSub;
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Timer? _retryTimer;
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// Location state
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LatLng? _currentLocation;
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bool _hasLocation = false;
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// Callbacks - set during initialization
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AnimatedMapController? _mapController;
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VoidCallback? _onLocationUpdated;
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FollowMeMode Function()? _getCurrentFollowMeMode;
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bool Function()? _getProximityAlertsEnabled;
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int Function()? _getProximityAlertDistance;
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List<OsmNode> Function()? _getNearbyNodes;
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List<NodeProfile> Function()? _getEnabledProfiles;
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VoidCallback? _onMapMovedProgrammatically;
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/// Get the current GPS location (if available)
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LatLng? get currentLocation => _currentLocation;
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/// Whether we currently have a valid GPS location
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bool get hasLocation => _hasLocation;
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/// Initialize GPS tracking with callbacks
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Future<void> initialize({
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required AnimatedMapController mapController,
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required VoidCallback onLocationUpdated,
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required FollowMeMode Function() getCurrentFollowMeMode,
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required bool Function() getProximityAlertsEnabled,
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required int Function() getProximityAlertDistance,
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required List<OsmNode> Function() getNearbyNodes,
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required List<NodeProfile> Function() getEnabledProfiles,
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VoidCallback? onMapMovedProgrammatically,
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}) async {
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debugPrint('[GpsController] Initializing GPS controller');
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// Store callbacks
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_mapController = mapController;
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_onLocationUpdated = onLocationUpdated;
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_getCurrentFollowMeMode = getCurrentFollowMeMode;
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_getProximityAlertsEnabled = getProximityAlertsEnabled;
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_getProximityAlertDistance = getProximityAlertDistance;
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_getNearbyNodes = getNearbyNodes;
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_getEnabledProfiles = getEnabledProfiles;
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_onMapMovedProgrammatically = onMapMovedProgrammatically;
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// Start location tracking
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await _startLocationTracking();
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}
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/// Update follow-me mode and restart tracking with appropriate frequency
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void updateFollowMeMode({
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required FollowMeMode newMode,
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required FollowMeMode oldMode,
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}) {
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debugPrint('[GpsController] Follow-me mode changed: $oldMode → $newMode');
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// Restart position stream with new frequency settings
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_restartPositionStream();
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// Handle initial animation when follow-me is first enabled
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_handleInitialFollowMeAnimation(newMode, oldMode);
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}
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/// Manual retry (e.g., user pressed follow-me button)
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Future<void> retryLocationInit() async {
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debugPrint('[GpsController] Manual retry of location initialization');
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_cancelRetry();
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await _startLocationTracking();
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}
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/// Start location tracking - checks permissions and starts stream
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Future<void> _startLocationTracking() async {
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_stopLocationTracking(); // Clean slate
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// Check if location services are enabled
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bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
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if (!serviceEnabled) {
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debugPrint('[GpsController] Location services disabled');
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_hasLocation = false;
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_notifyLocationChange();
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_scheduleRetry();
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return;
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}
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// Check permissions
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final permission = await Geolocator.requestPermission();
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debugPrint('[GpsController] Location permission result: $permission');
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switch (permission) {
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case LocationPermission.deniedForever:
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// User said "never" - respect that and stop trying
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debugPrint('[GpsController] Location denied forever - stopping attempts');
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_hasLocation = false;
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_notifyLocationChange();
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return;
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case LocationPermission.denied:
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// User said "not now" - keep trying later
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debugPrint('[GpsController] Location denied - will retry later');
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_hasLocation = false;
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_notifyLocationChange();
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_scheduleRetry();
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return;
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case LocationPermission.whileInUse:
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case LocationPermission.always:
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// Permission granted - start stream
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debugPrint('[GpsController] Location permission granted: $permission');
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_startPositionStream();
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return;
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case LocationPermission.unableToDetermine:
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// Couldn't determine permission state - treat like denied and retry
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debugPrint('[GpsController] Unable to determine permission state - will retry');
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_hasLocation = false;
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_notifyLocationChange();
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_scheduleRetry();
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return;
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}
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}
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/// Start the GPS position stream
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void _startPositionStream() {
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final followMeMode = _getCurrentFollowMeMode?.call() ?? FollowMeMode.off;
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final distanceFilter = followMeMode == FollowMeMode.off ? 5 : 1; // 5m normal, 1m follow-me
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debugPrint('[GpsController] Starting GPS position stream (${distanceFilter}m filter)');
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try {
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_positionSub = Geolocator.getPositionStream(
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locationSettings: LocationSettings(
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accuracy: LocationAccuracy.high, // Request best, accept what we get
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distanceFilter: distanceFilter,
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),
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).listen(
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_onPositionReceived,
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onError: _onPositionError,
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);
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} catch (e) {
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debugPrint('[GpsController] Failed to start position stream: $e');
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_hasLocation = false;
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_notifyLocationChange();
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_scheduleRetry();
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}
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}
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/// Restart position stream with current follow-me settings
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void _restartPositionStream() {
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if (_positionSub == null) {
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// No active stream, let retry logic handle it
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return;
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}
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debugPrint('[GpsController] Restarting position stream for follow-me mode change');
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_stopLocationTracking();
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_startPositionStream();
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}
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/// Handle incoming GPS position
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void _onPositionReceived(Position position) {
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final newLocation = LatLng(position.latitude, position.longitude);
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_currentLocation = newLocation;
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if (!_hasLocation) {
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debugPrint('[GpsController] GPS location acquired');
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}
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_hasLocation = true;
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_cancelRetry(); // Got location, stop any retry attempts
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debugPrint('[GpsController] GPS position: ${newLocation.latitude}, ${newLocation.longitude} (±${position.accuracy}m)');
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// Notify UI
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_notifyLocationChange();
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// Handle proximity alerts
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_checkProximityAlerts(newLocation);
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// Handle follow-me animations
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_handleFollowMeUpdate(position, newLocation);
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}
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/// Handle GPS stream errors
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void _onPositionError(dynamic error) {
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debugPrint('[GpsController] Position stream error: $error');
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if (_hasLocation) {
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debugPrint('[GpsController] Lost GPS location - will retry');
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}
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_hasLocation = false;
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_currentLocation = null;
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_notifyLocationChange();
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_scheduleRetry();
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}
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/// Check proximity alerts if enabled
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void _checkProximityAlerts(LatLng userLocation) {
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final proximityEnabled = _getProximityAlertsEnabled?.call() ?? false;
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if (!proximityEnabled) return;
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final nearbyNodes = _getNearbyNodes?.call() ?? [];
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if (nearbyNodes.isEmpty) return;
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final alertDistance = _getProximityAlertDistance?.call() ?? 200;
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final enabledProfiles = _getEnabledProfiles?.call() ?? [];
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ProximityAlertService().checkProximity(
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userLocation: userLocation,
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nodes: nearbyNodes,
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enabledProfiles: enabledProfiles,
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alertDistance: alertDistance,
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);
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}
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/// Handle follow-me animations
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void _handleFollowMeUpdate(Position position, LatLng location) {
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final followMeMode = _getCurrentFollowMeMode?.call() ?? FollowMeMode.off;
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if (followMeMode == FollowMeMode.off || _mapController == null) {
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return;
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}
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WidgetsBinding.instance.addPostFrameCallback((_) {
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try {
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if (followMeMode == FollowMeMode.follow) {
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// Follow position, preserve rotation
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_mapController!.animateTo(
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dest: location,
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zoom: _mapController!.mapController.camera.zoom,
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rotation: _mapController!.mapController.camera.rotation,
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duration: kFollowMeAnimationDuration,
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curve: Curves.easeOut,
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);
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} else if (followMeMode == FollowMeMode.rotating) {
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// Follow position and heading
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final heading = position.heading;
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final speed = position.speed;
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// Only rotate if moving fast enough and heading is valid
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final shouldRotate = !speed.isNaN && speed >= kMinSpeedForRotationMps && !heading.isNaN;
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final rotation = shouldRotate ? -heading : _mapController!.mapController.camera.rotation;
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_mapController!.animateTo(
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dest: location,
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zoom: _mapController!.mapController.camera.zoom,
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rotation: rotation,
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duration: kFollowMeAnimationDuration,
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curve: Curves.easeOut,
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);
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}
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// Notify that map was moved programmatically
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_onMapMovedProgrammatically?.call();
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} catch (e) {
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debugPrint('[GpsController] Map animation error: $e');
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}
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});
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}
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/// Handle initial animation when follow-me mode is enabled
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void _handleInitialFollowMeAnimation(FollowMeMode newMode, FollowMeMode oldMode) {
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if (newMode == FollowMeMode.off || oldMode != FollowMeMode.off) {
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return; // Not enabling follow-me, or already enabled
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}
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if (_currentLocation == null || _mapController == null) {
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return; // No location or map controller
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}
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try {
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if (newMode == FollowMeMode.follow) {
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_mapController!.animateTo(
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dest: _currentLocation!,
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zoom: _mapController!.mapController.camera.zoom,
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duration: kFollowMeAnimationDuration,
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curve: Curves.easeOut,
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);
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} else if (newMode == FollowMeMode.rotating) {
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// Reset to north-up when starting rotating mode
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_mapController!.animateTo(
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dest: _currentLocation!,
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zoom: _mapController!.mapController.camera.zoom,
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rotation: 0.0,
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duration: kFollowMeAnimationDuration,
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curve: Curves.easeOut,
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);
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}
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_onMapMovedProgrammatically?.call();
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} catch (e) {
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debugPrint('[GpsController] Initial follow-me animation error: $e');
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}
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}
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/// Notify UI that location status changed
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void _notifyLocationChange() {
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_onLocationUpdated?.call();
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}
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/// Schedule retry attempts for location access
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void _scheduleRetry() {
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_cancelRetry();
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_retryTimer = Timer.periodic(const Duration(seconds: 15), (timer) {
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debugPrint('[GpsController] Retry attempt ${timer.tick}');
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_startLocationTracking();
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});
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}
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/// Cancel any pending retry attempts
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void _cancelRetry() {
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if (_retryTimer != null) {
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debugPrint('[GpsController] Canceling retry timer');
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_retryTimer?.cancel();
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_retryTimer = null;
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}
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}
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/// Stop the position stream
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void _stopLocationTracking() {
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_positionSub?.cancel();
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_positionSub = null;
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}
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/// Clean up all resources
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void dispose() {
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debugPrint('[GpsController] Disposing GPS controller');
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_stopLocationTracking();
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_cancelRetry();
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// Clear callbacks
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_mapController = null;
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_onLocationUpdated = null;
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_getCurrentFollowMeMode = null;
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_getProximityAlertsEnabled = null;
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_getProximityAlertDistance = null;
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_getNearbyNodes = null;
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_getEnabledProfiles = null;
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_onMapMovedProgrammatically = null;
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}
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} |