New screen names

lib/localization/app_localization.dart

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+import 'en_us/en_us_translations.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/cupertino.dart';
+import '../core/app_export.dart';
+
+class AppLocalization {
+  AppLocalization(this.locale);
+
+  Locale locale;
+
+  static final Map<String, Map<String, String>> _localizedValues = {'en': enUs};
+
+  static AppLocalization of() {
+    return Localizations.of<AppLocalization>(
+        NavigatorService.navigatorKey.currentContext!, AppLocalization)!;
+  }
+
+  static List<String> languages() => _localizedValues.keys.toList();
+  String getString(String text) =>
+      _localizedValues[locale.languageCode]![text] ?? text;
+}
+
+class AppLocalizationDelegate extends LocalizationsDelegate<AppLocalization> {
+  const AppLocalizationDelegate();
+
+  @override
+  bool isSupported(Locale locale) =>
+      AppLocalization.languages().contains(locale.languageCode);
+
+  //Returning a SynchronousFuture here because an async "load" operation
+  //cause an async "load" operation
+  @override
+  Future<AppLocalization> load(Locale locale) {
+    return SynchronousFuture<AppLocalization>(AppLocalization(locale));
+  }
+
+  @override
+  bool shouldReload(AppLocalizationDelegate old) => false;
+}
+
+extension LocalizationExtension on String {
+  String get tr => AppLocalization.of().getString(this);
+}