init

lib/core/cache/app_storage.dart

@@ -0,0 +1,68 @@
+import 'dart:convert';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AppStorage {
+  AppStorage._();
+
+  static SharedPreferences? _prefs;
+
+  static Future<void> init() async {
+    _prefs ??= await SharedPreferences.getInstance();
+  }
+
+  static SharedPreferences get instance {
+    final prefs = _prefs;
+    if (prefs == null) {
+      throw StateError('AppStorage.init() must be called before use.');
+    }
+    return prefs;
+  }
+
+  static String? getString(String key) => instance.getString(key);
+
+  static Future<bool> setString(String key, String value) {
+    return instance.setString(key, value);
+  }
+
+  static int getInt(String key, {int defaultValue = 0}) {
+    return instance.getInt(key) ?? defaultValue;
+  }
+
+  static Future<bool> setInt(String key, int value) {
+    return instance.setInt(key, value);
+  }
+
+  static bool getBool(String key, {bool defaultValue = false}) {
+    return instance.getBool(key) ?? defaultValue;
+  }
+
+  static Future<bool> setBool(String key, bool value) {
+    return instance.setBool(key, value);
+  }
+
+  static List<String> getStringList(String key) {
+    return instance.getStringList(key) ?? const [];
+  }
+
+  static Future<bool> setStringList(String key, List<String> value) {
+    return instance.setStringList(key, value);
+  }
+
+  static Map<String, dynamic>? getJson(String key) {
+    final raw = instance.getString(key);
+    if (raw == null || raw.isEmpty) return null;
+    final decoded = jsonDecode(raw);
+    return decoded is Map<String, dynamic> ? decoded : null;
+  }
+
+  static Future<bool> setJson(String key, Map<String, dynamic> value) {
+    return instance.setString(key, jsonEncode(value));
+  }
+
+  static bool containsKey(String key) => instance.containsKey(key);
+
+  static Future<bool> remove(String key) => instance.remove(key);
+
+  static Future<bool> clear() => instance.clear();
+}

lib/core/cache/storage_keys.dart

@@ -0,0 +1,9 @@
+class StorageKeys {
+  StorageKeys._();
+
+  static const authToken = 'auth_token';
+  static const locale = 'locale';
+  static const themeMode = 'theme_mode';
+  static const offlineQueue = 'offline_queue';
+  static const offlineDeadQueue = 'offline_dead_queue';
+}