87 lines
2.6 KiB
Dart
87 lines
2.6 KiB
Dart
import 'dart:async';
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import 'package:anyway/domain/entities/preferences.dart';
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import 'package:anyway/domain/entities/trip.dart';
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import 'package:anyway/domain/repositories/trip_repository.dart';
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import 'package:anyway/presentation/providers/landmark_providers.dart';
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import 'package:anyway/presentation/providers/core_providers.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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// Provides a function that creates a trip given preferences.
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final createTripProvider = Provider<Future<Trip> Function(Preferences)>((ref) {
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return (Preferences prefs) async {
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final repo = ref.read(tripRepositoryProvider);
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final landmarks = await repo.searchLandmarks(prefs);
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ref.read(intermediateLandmarksProvider.notifier).setLandmarks(landmarks);
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final trip = await repo.getTrip(preferences: prefs, landmarks: landmarks);
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await ref.read(currentTripsProvider.notifier).saveTrip(trip);
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return trip;
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};
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});
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class CurrentTripsNotifier extends AsyncNotifier<List<Trip>> {
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TripRepository get _repository => ref.read(tripRepositoryProvider);
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Future<List<Trip>>? _pendingLoad;
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List<Trip> _currentTrips() => state.asData?.value ?? const <Trip>[];
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@override
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Future<List<Trip>> build() async {
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final load = _repository.getSavedTrips();
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_pendingLoad = load;
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try {
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final trips = await load;
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return List.unmodifiable(trips);
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} finally {
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if (identical(_pendingLoad, load)) {
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_pendingLoad = null;
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}
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}
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}
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Future<void> refresh() async {
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state = const AsyncValue.loading();
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final load = _repository.getSavedTrips();
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_pendingLoad = load;
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state = await AsyncValue.guard(() async {
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final trips = await load;
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return List.unmodifiable(trips);
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});
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if (identical(_pendingLoad, load)) {
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_pendingLoad = null;
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}
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}
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Future<void> saveTrip(Trip trip) async {
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final previous = state;
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final updatedTrips = [..._currentTrips()]
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..removeWhere((t) => t.uuid == trip.uuid)
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..insert(0, trip);
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state = AsyncValue.data(List.unmodifiable(updatedTrips));
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try {
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await _repository.saveTrip(trip);
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} catch (error) {
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state = previous;
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rethrow;
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}
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}
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Future<void> deleteTrip(String uuid) async {
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final previous = state;
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final updatedTrips = _currentTrips()
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.where((trip) => trip.uuid != uuid)
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.toList(growable: false);
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state = AsyncValue.data(List.unmodifiable(updatedTrips));
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try {
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await _repository.deleteSavedTrip(uuid);
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} catch (error) {
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state = previous;
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rethrow;
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}
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}
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}
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final currentTripsProvider = AsyncNotifierProvider<CurrentTripsNotifier, List<Trip>>(CurrentTripsNotifier.new);
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