78 lines
2.4 KiB
Dart
78 lines
2.4 KiB
Dart
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import 'dart:async';
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import 'package:location/location.dart';
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import 'package:gps/models/gps_point.dart';
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import 'package:gps/utils/gps_persister.dart';
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import 'bloc_provider.dart';
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// An action which is triggert by the UI
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enum GpsBlocAction { toggleRecording, save }
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// A state change triggert by the Business Logic
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enum GpsBlocState { recording, notRecording }
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class GpsBloc implements BlocBase {
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final GpsPersister _persister;
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bool _recording = false;
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GpsPoint _currentLocation = GpsPoint();
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List<GpsPoint> _recordedLocations = [];
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final StreamController<GpsPoint> _gpsOutController =
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StreamController<GpsPoint>.broadcast();
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Stream<GpsPoint> get gpsPoint => _gpsOutController.stream;
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final StreamController<LocationData> _gpsInController =
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StreamController<LocationData>.broadcast();
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StreamSink get gpsIn => _gpsInController.sink;
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final StreamController<GpsBlocState> _stateOutController =
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StreamController<GpsBlocState>.broadcast();
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Stream<GpsBlocState> get stateOut => _stateOutController.stream;
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final StreamController<GpsBlocAction> _actionInController =
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StreamController<GpsBlocAction>.broadcast();
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StreamSink get actionIn => _actionInController.sink;
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GpsBloc(this._persister) {
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_gpsInController.stream.listen(_handleNewPosition);
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_actionInController.stream.listen(_handleActions);
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}
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void _handleNewPosition(LocationData event) {
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_currentLocation = GpsPoint(
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latitude: event.latitude ?? 0.0,
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longitude: event.longitude ?? 0.0,
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accuracy: event.accuracy ?? 0.0,
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speed: event.speed ?? 0.0,
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heading: event.heading ?? 0.0,
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time: event.time ?? 0.0,
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satelliteNumber: event.satelliteNumber ?? 0,
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provider: event.provider ?? "none");
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if (_recording) {
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_recordedLocations.add(_currentLocation);
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}
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_gpsOutController.sink.add(_currentLocation);
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}
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void _handleActions(GpsBlocAction event) {
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switch (event) {
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case GpsBlocAction.toggleRecording:
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_recording = !_recording;
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_stateOutController.sink.add(
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_recording ? GpsBlocState.recording : GpsBlocState.notRecording);
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break;
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case GpsBlocAction.save:
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_persister.save(_recordedLocations);
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_recordedLocations = [];
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break;
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}
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}
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@override
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void dispose() {
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_gpsOutController.close();
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_gpsInController.close();
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_stateOutController.close();
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_actionInController.close();
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}
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}
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