first commit

lib/data/datasources/settings_local_datasource.dart

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+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../presentation/setting/models/tax_model.dart';
+
+class SettingsLocalDatasource {
+  // save tax to shared preferences
+  Future<bool> saveTax(TaxModel taxModel) async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.setString('tax', taxModel.toJson());
+  }
+
+  // get tax from shared preferences
+  Future<TaxModel> getTax() async {
+    final prefs = await SharedPreferences.getInstance();
+    final tax = prefs.getString('tax');
+    if (tax != null) {
+      return TaxModel.fromJson(tax);
+    } else {
+      return TaxModel(
+        name: 'Tax',
+        type: TaxType.pajak,
+        value: 11,
+      );
+    }
+  }
+
+  // save service charge to shared preferences
+  Future<bool> saveServiceCharge(int serviceCharge) async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.setInt('serviceCharge', serviceCharge);
+  }
+
+  // get service charge from shared preferences
+  Future<int> getServiceCharge() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getInt('serviceCharge') ?? 0;
+  }
+}