81 lines
2.2 KiB
Dart
81 lines
2.2 KiB
Dart
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import 'dart:async';
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import 'dart:math';
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import 'package:gps/utils/environment.dart';
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import 'package:location/location.dart';
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import 'package:wakelock/wakelock.dart';
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class GpsUtils {
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_Stream s;
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GpsUtils()
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: s = Environment.hasRealGps
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? _RealGpsStream()
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: _FakeGpsStream(49.4833, 8.4667, Duration(milliseconds: 100));
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Stream<LocationData> get stream => s.getStream();
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}
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mixin _Stream {
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Stream<LocationData> getStream();
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}
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class _RealGpsStream implements _Stream {
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// Really, really ugly
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// - Location package should have been encapsulated
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// - Permissions do not belong here
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Stream<LocationData> getStream() {
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final Location location = Location();
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location.serviceEnabled().then((_serviceEnabled) => {
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if (!_serviceEnabled) {location.requestService()}
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});
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location.hasPermission().then((_permissionGranted) => {
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if (_permissionGranted == PermissionStatus.denied)
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{location.requestPermission()}
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});
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location.changeSettings(
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accuracy: LocationAccuracy.high, interval: 100, distanceFilter: 0.0);
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Wakelock.enable();
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return location.onLocationChanged;
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}
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}
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class _FakeGpsStream implements _Stream {
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double lat;
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double lon;
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Duration dur;
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_FakeGpsStream(this.lat, this.lon, [this.dur = const Duration(seconds: 1)]);
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/// Generator which creates GPS coordinates around the given location.
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Stream<LocationData> getStream() async* {
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Map<String, dynamic> gpsPoint = {
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'accuracy': 20.0,
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'altitude': 100.0,
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'speed': 1.0,
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'speed_accuracy': 1.0,
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'isMock': 1,
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'verticalAccuracy': 20.0,
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'headingAccuracy': 1.0,
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'elapsedRealtimeNanos': 1000.0,
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'elapsedRealtimeUncertaintyNanos': 2000.0,
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'satelliteNumber': 0,
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'provider': "dummy"
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};
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double degree = 0.0;
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while (true) {
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await Future.delayed(dur);
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gpsPoint['time'] = DateTime.now().millisecondsSinceEpoch + 0.0;
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double rad = degree * pi / 180;
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gpsPoint['latitude'] = lat + cos(rad);
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gpsPoint['longitude'] = lon + sin(rad);
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gpsPoint['heading'] = degree;
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gpsPoint['altitude'] = degree;
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degree = (degree + 1) % 360;
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yield LocationData.fromMap(gpsPoint);
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}
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}
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}
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