added location handling to storage

lib/model/repositories/interfaces/location_repository.dart

@@ -0,0 +1,19 @@
+import '../../location.dart';
+
+abstract class LocationRepository {
+  // Create
+
+  Future<void> createLocation(Location location);
+
+  // Read
+
+  Future<List<Location>> loadLocations();
+
+  // Update
+
+  Future<void> updateLocation(Location location);
+
+  // Delete
+
+  Future<void> deleteLocation(Location location);
+}

lib/model/repositories/local_repository.dart

@@ -3,14 +3,18 @@ import 'dart:convert';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import '../alarm.dart';
+import '../location.dart';
 import '../task.dart';
 import 'interfaces/alarm_repository.dart';
+import 'interfaces/location_repository.dart';
 import 'interfaces/task_repository.dart';
 
-class LocalRepository implements TaskRepository, AlarmRepository {
+class LocalRepository
+    implements TaskRepository, AlarmRepository, LocationRepository {
   static const String _tasksKey = 'tasks';
   static const String _taskOrderKey = 'taskOrder';
   static const String _alarmsKey = 'alarms';
+  static const String _locationsKey = 'locations';
 
   SharedPreferencesWithCache? _prefs;
 
@@ -29,6 +33,13 @@ class LocalRepository implements TaskRepository, AlarmRepository {
     _prefs!.setStringList(_tasksKey, jsonList);
   }
 
+  Future<void> _saveLocations(List<Location> locations) async {
+    final jsonList = locations
+        .map<String>((e) => jsonEncode(e.toJson()))
+        .toList();
+    _prefs!.setStringList(_locationsKey, jsonList);
+  }
+
   Future<void> _saveTaskOrder(List<String> taskOrder) async {
     final jsonList = taskOrder.map((e) => jsonEncode(e)).toList();
     return _prefs!.setStringList(_taskOrderKey, jsonList);
@@ -62,6 +73,13 @@ class LocalRepository implements TaskRepository, AlarmRepository {
     _saveAlarms(alarms);
   }
 
+  @override
+  Future<void> createLocation(Location location) async {
+    final locations = await loadLocations();
+    locations.add(location);
+    _saveLocations(locations);
+  }
+
   // Read
 
   @override
@@ -83,6 +101,15 @@ class LocalRepository implements TaskRepository, AlarmRepository {
     return jsonList.map<Alarm>((e) => Alarm.fromJson(jsonDecode(e))).toList();
   }
 
+  @override
+  Future<List<Location>> loadLocations() async {
+    final Iterable<String> jsonList =
+        _prefs!.getStringList(_locationsKey) ?? [];
+    return jsonList
+        .map<Location>((e) => Location.fromJson(jsonDecode(e)))
+        .toList();
+  }
+
   // Update
 
   @override
@@ -106,6 +133,14 @@ class LocalRepository implements TaskRepository, AlarmRepository {
     _saveAlarms(alarms);
   }
 
+  @override
+  Future<void> updateLocation(Location location) async {
+    final locations = await loadLocations();
+    locations.remove(location);
+    locations.add(location);
+    _saveLocations(locations);
+  }
+
   // Delete
 
   @override
@@ -128,4 +163,11 @@ class LocalRepository implements TaskRepository, AlarmRepository {
     alarms.remove(alarm);
     _saveAlarms(alarms);
   }
+
+  @override
+  Future<void> deleteLocation(Location location) async {
+    final locations = await loadLocations();
+    locations.remove(location);
+    _saveLocations(locations);
+  }
 }