feat: EXPERIMENTAL language switching.

.gitignore

@@ -136,3 +136,4 @@ app.*.map.json
 
 Firebase related
 .firebase
+/lib/utils/environment.dart

lib/app/app.dart

@@ -1,3 +1,4 @@
+import 'package:revanced_manager/services/crowdin_api.dart';
 import 'package:revanced_manager/services/github_api.dart';
 import 'package:revanced_manager/services/manager_api.dart';
 import 'package:revanced_manager/services/patcher_api.dart';
@@ -37,6 +38,7 @@ import 'package:stacked_services/stacked_services.dart';
     LazySingleton(classType: PatcherAPI),
     LazySingleton(classType: RevancedAPI),
     LazySingleton(classType: GithubAPI),
+    LazySingleton(classType: CrowdinAPI),
     LazySingleton(classType: Toast),
   ],
 )

lib/main.dart

@@ -2,16 +2,19 @@ import 'package:flutter/material.dart';
 import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:revanced_manager/app/app.locator.dart';
+import 'package:revanced_manager/services/crowdin_api.dart';
 import 'package:revanced_manager/services/github_api.dart';
 import 'package:revanced_manager/services/manager_api.dart';
 import 'package:revanced_manager/services/patcher_api.dart';
 import 'package:revanced_manager/services/revanced_api.dart';
 import 'package:revanced_manager/ui/theme/dynamic_theme_builder.dart';
 import 'package:revanced_manager/ui/views/navigation/navigation_view.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:stacked_themes/stacked_themes.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';
 import 'package:timezone/data/latest.dart' as tz;
 
+late SharedPreferences prefs;
 Future main() async {
   await ThemeManager.initialise();
   await setupLocator();
@@ -19,10 +22,12 @@ Future main() async {
   await locator<ManagerAPI>().initialize();
   String apiUrl = locator<ManagerAPI>().getApiUrl();
   await locator<RevancedAPI>().initialize(apiUrl);
+  await locator<CrowdinAPI>().initialize();
   // bool isSentryEnabled = locator<ManagerAPI>().isSentryEnabled();
   locator<GithubAPI>().initialize();
   await locator<PatcherAPI>().initialize();
   tz.initializeTimeZones();
+  prefs = await SharedPreferences.getInstance();
 
   // Remove this section if you are building from source and don't have sentry configured
   // await SentryFlutter.init(
@@ -55,15 +60,25 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    String rawLocale = prefs.getString('language') ?? 'en_US';
+    String replaceLocale = rawLocale.replaceAll('_', '-');
+    List<String> localeList = replaceLocale.split('-');
+    Locale locale = Locale(localeList[0], localeList[1]);
+
     return DynamicThemeBuilder(
       title: 'ReVanced Manager',
       home: const NavigationView(),
       localizationsDelegates: [
         FlutterI18nDelegate(
           translationLoader: FileTranslationLoader(
-            fallbackFile: 'en_US',
+            forcedLocale: locale,
             basePath: 'assets/i18n',
+            useCountryCode: true,
           ),
+          missingTranslationHandler: (key, locale) {
+            print(
+                '--> Missing translation: key: $key, languageCode: ${locale?.languageCode}');
+          },
         ),
         GlobalMaterialLocalizations.delegate,
         GlobalWidgetsLocalizations.delegate

lib/services/crowdin_api.dart

@@ -0,0 +1,61 @@
+import 'package:dio/dio.dart';
+import 'package:dio_http_cache_lts/dio_http_cache_lts.dart';
+import 'package:injectable/injectable.dart' hide Environment;
+import 'package:revanced_manager/utils/environment.dart';
+import 'package:sentry_dio/sentry_dio.dart';
+import 'package:sentry_flutter/sentry_flutter.dart';
+
+@lazySingleton
+class CrowdinAPI {
+  late Dio _dio = Dio();
+  final DioCacheManager _dioCacheManager = DioCacheManager(CacheConfig());
+  final apiKey = Environment.crowdinKEY;
+
+  Future<void> initialize() async {
+    try {
+      _dio = Dio(BaseOptions(
+        baseUrl: 'https://api.crowdin.com/api/v2',
+      ));
+
+      _dio.interceptors.add(_dioCacheManager.interceptor);
+      _dio.addSentry(
+        captureFailedRequests: true,
+      );
+    } on Exception catch (e, s) {
+      await Sentry.captureException(e, stackTrace: s);
+    }
+  }
+
+  Future<void> clearAllCache() async {
+    try {
+      await _dioCacheManager.clearAll();
+    } on Exception catch (e, s) {
+      await Sentry.captureException(e, stackTrace: s);
+    }
+  }
+
+  Future<List> getLanguages() async {
+    try {
+      var response = await _dio.get(
+        '/projects',
+        options: buildCacheOptions(
+          const Duration(hours: 6),
+          maxStale: const Duration(days: 1),
+          options: Options(
+            headers: {
+              'Authorization': 'Bearer $apiKey',
+            },
+            contentType: 'application/json',
+          ),
+        ),
+      );
+      List targetLanguages =
+          await response.data['data'][0]['data']['targetLanguages'];
+
+      return targetLanguages;
+    } on Exception catch (e, s) {
+      await Sentry.captureException(e, stackTrace: s);
+      return [];
+    }
+  }
+}

lib/ui/views/settings/settings_view.dart

@@ -92,7 +92,7 @@ class SettingsView extends StatelessWidget {
                   SettingsTileDialog(
                     padding: const EdgeInsets.symmetric(horizontal: 20.0),
                     title: 'settingsView.languageLabel',
-                    subtitle: 'English',
+                    subtitle: model.selectedLanguage,
                     onTap: () => model.showLanguagesDialog(context),
                   ),
                   _settingsDivider,

lib/ui/views/settings/settings_viewmodel.dart

@@ -11,8 +11,11 @@ import 'package:logcat/logcat.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:revanced_manager/app/app.locator.dart';
 import 'package:revanced_manager/app/app.router.dart';
+import 'package:revanced_manager/main.dart';
+import 'package:revanced_manager/services/crowdin_api.dart';
 import 'package:revanced_manager/services/manager_api.dart';
 import 'package:revanced_manager/services/toast.dart';
+import 'package:revanced_manager/ui/views/navigation/navigation_viewmodel.dart';
 import 'package:revanced_manager/ui/views/patcher/patcher_viewmodel.dart';
 import 'package:revanced_manager/ui/widgets/shared/custom_material_button.dart';
 import 'package:revanced_manager/ui/widgets/settingsView/custom_text_field.dart';
@@ -20,7 +23,8 @@ import 'package:sentry_flutter/sentry_flutter.dart';
 import 'package:share_extend/share_extend.dart';
 import 'package:stacked/stacked.dart';
 import 'package:stacked_services/stacked_services.dart';
-import 'package:timeago/timeago.dart';
+import 'package:timeago/timeago.dart' as timeago;
+import 'package:shared_preferences/shared_preferences.dart';
 
 // ignore: constant_identifier_names
 const int ANDROID_12_SDK_VERSION = 31;
@@ -28,14 +32,28 @@ const int ANDROID_12_SDK_VERSION = 31;
 class SettingsViewModel extends BaseViewModel {
   final NavigationService _navigationService = locator<NavigationService>();
   final ManagerAPI _managerAPI = locator<ManagerAPI>();
+  final CrowdinAPI _crowdinAPI = locator<CrowdinAPI>();
   final Toast _toast = locator<Toast>();
   final TextEditingController _orgPatSourceController = TextEditingController();
   final TextEditingController _patSourceController = TextEditingController();
   final TextEditingController _orgIntSourceController = TextEditingController();
   final TextEditingController _intSourceController = TextEditingController();
   final TextEditingController _apiUrlController = TextEditingController();
+  late SharedPreferences _prefs;
+  String selectedLanguage = 'English';
+  String selectedLanguageLocale = prefs.getString('language') ?? 'en_US';
+  List languages = [];
 
-  void setLanguage(String language) {
+  Future<void> initLang() async {
+    languages = await _crowdinAPI.getLanguages();
+    languages.sort((a, b) => a['name'].compareTo(b['name']));
+    notifyListeners();
+  }
+
+  Future<void> initialize() async {
+    _prefs = await SharedPreferences.getInstance();
+    selectedLanguageLocale =
+        _prefs.getString('language') ?? selectedLanguageLocale;
     notifyListeners();
   }
 
@@ -45,8 +63,13 @@ class SettingsViewModel extends BaseViewModel {
 
   Future<void> updateLanguage(BuildContext context, String? value) async {
     if (value != null) {
+      selectedLanguageLocale = value;
+      _prefs = await SharedPreferences.getInstance();
+      await _prefs.setString('language', value);
       await FlutterI18n.refresh(context, Locale(value));
-      setLocaleMessages(value, EnMessages());
+      timeago.setLocaleMessages(value, timeago.EnMessages());
+      locator<NavigationViewModel>().notifyListeners();
+      notifyListeners();
     }
   }
 
@@ -86,21 +109,33 @@ class SettingsViewModel extends BaseViewModel {
     notifyListeners();
   }
 
-  Future<void> showLanguagesDialog(BuildContext context) {
+  Future<void> showLanguagesDialog(BuildContext parentContext) {
+    initLang();
     return showDialog(
-      context: context,
+      context: parentContext,
       builder: (context) => SimpleDialog(
         title: I18nText('settingsView.languageLabel'),
         backgroundColor: Theme.of(context).colorScheme.secondaryContainer,
-        children: <Widget>[
-          RadioListTile<String>(
-            title: I18nText('settingsView.englishOption'),
-            value: 'en',
-            groupValue: 'en',
-            onChanged: (value) {
-              updateLanguage(context, value);
-              Navigator.of(context).pop();
-            },
+        children: [
+          SizedBox(
+            height: 500,
+            child: ListView.builder(
+              itemCount: languages.length,
+              itemBuilder: (context, index) {
+                return RadioListTile<String>(
+                  title: Text(languages[index]['name']),
+                  subtitle: Text(languages[index]['locale']),
+                  value: languages[index]['locale'],
+                  groupValue: selectedLanguageLocale,
+                  onChanged: (value) {
+                    selectedLanguage = languages[index]['name'];
+                    _toast.show('settingsView.restartAppForChanges');
+                    updateLanguage(context, value);
+                    Navigator.pop(context);
+                  },
+                );
+              },
+            ),
           ),
         ],
       ),
@@ -355,16 +390,13 @@ class SettingsViewModel extends BaseViewModel {
     try {
       File outFile = File(_managerAPI.storedPatchesFile);
       if (outFile.existsSync()) {
-        String dateTime = DateTime.now()
-            .toString()
-            .replaceAll(' ', '_')
-            .split('.').first;
-        String tempFilePath = '${outFile.path.substring(0, outFile.path.lastIndexOf('/') + 1)}selected_patches_$dateTime.json';
+        String dateTime =
+            DateTime.now().toString().replaceAll(' ', '_').split('.').first;
+        String tempFilePath =
+            '${outFile.path.substring(0, outFile.path.lastIndexOf('/') + 1)}selected_patches_$dateTime.json';
         outFile.copySync(tempFilePath);
         await CRFileSaver.saveFileWithDialog(SaveFileDialogParams(
-          sourceFilePath: tempFilePath,
-          destinationFileName: ''
-        ));
+            sourceFilePath: tempFilePath, destinationFileName: ''));
         File(tempFilePath).delete();
         locator<Toast>().showBottom('settingsView.exportedPatches');
       } else {