Changing the local storage from SharedPreferences to Hive to demonstrate the separation of concerns

lib/shared/data/local/shared_prefs_storage_service.dart

@@ -1,49 +1,49 @@
 import 'dart:async';
-
 import 'package:flutter_project/shared/data/local/storage_service.dart';
-import 'package:shared_preferences/shared_preferences.dart';
+import 'package:hive_flutter/hive_flutter.dart';
 
-class SharedPrefsService implements StroageService {
-  SharedPreferences? sharedPreferences;
+class HiveService implements StroageService {
+  Box? box;
 
-  final Completer<SharedPreferences> initCompleter =
-      Completer<SharedPreferences>();
+  final Completer<Box> initCompleter = Completer<Box>();
 
   @override
   void init() {
-    initCompleter.complete(SharedPreferences.getInstance());
+    initCompleter.complete(Hive.openBox('HiveService'));
   }
 
   @override
-  bool get hasInitialized => sharedPreferences != null;
+  bool get hasInitialized => initCompleter.isCompleted;
 
   @override
   Future<Object?> get(String key) async {
-    sharedPreferences = await initCompleter.future;
-    return sharedPreferences!.get(key);
+    box = await initCompleter.future;
+    return box?.get(key);
   }
 
   @override
   Future<void> clear() async {
-    sharedPreferences = await initCompleter.future;
-    await sharedPreferences!.clear();
+    box = await initCompleter.future;
+    await box?.clear();
   }
 
   @override
   Future<bool> has(String key) async {
-    sharedPreferences = await initCompleter.future;
-    return sharedPreferences?.containsKey(key) ?? false;
+    box = await initCompleter.future;
+    return box?.containsKey(key) ?? false;
   }
 
   @override
   Future<bool> remove(String key) async {
-    sharedPreferences = await initCompleter.future;
-    return await sharedPreferences!.remove(key);
+    box = await initCompleter.future;
+    await box?.delete(key);
+    return true;
   }
 
   @override
   Future<bool> set(String key, data) async {
-    sharedPreferences = await initCompleter.future;
-    return await sharedPreferences!.setString(key, data.toString());
+    box = await initCompleter.future;
+    await box?.put(key, data.toString());
+    return true;
   }
 }

lib/shared/domain/providers/sharedpreferences_storage_service_provider.dart

@@ -1,8 +1,8 @@
 import 'package:flutter_project/shared/data/local/shared_prefs_storage_service.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:hive_flutter/hive_flutter.dart';
 
 final storageServiceProvider = Provider((ref) {
-  final SharedPrefsService prefsService = SharedPrefsService();
-  prefsService.init();
-  return prefsService;
+  Hive.initFlutter();
+  return HiveService()..init();
 });

pubspec.yaml

@@ -19,8 +19,10 @@ dependencies:
     sdk: flutter
   flutter_riverpod: ^2.0.2
   freezed_annotation: ^2.2.0
+  hive_flutter: ^1.1.0
   json_annotation: ^4.7.0
-  shared_preferences: ^2.0.17
+  # shared_preferences: ^2.0.17
+  path_provider: ^2.0.13
   state_notifier: ^0.7.2+1
 
 dev_dependencies:
@@ -30,6 +32,7 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
   freezed: ^2.2.0
+  hive_test: ^1.0.1
   http_mock_adapter: ^0.3.3
   json_serializable: ^6.5.3
   mocktail: ^0.3.0