Added an option to prompt for a double back to close the app

lib/application/settings/settings_bloc.dart

@@ -38,6 +38,7 @@ class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
           showCharacterDetails: settings.showCharacterDetails,
           showWeaponDetails: settings.showWeaponDetails,
           serverResetTime: settings.serverResetTime,
+          doubleBackToClose: settings.doubleBackToClose,
         );
       },
       themeChanged: (event) async {
@@ -68,8 +69,14 @@ class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
         _homeBloc.add(const HomeEvent.init());
         return currentState.copyWith.call(serverResetTime: event.newValue);
       },
+      doubleBackToCloseChanged: (event) async {
+        _settingsService.doubleBackToClose = event.newValue;
+        return currentState.copyWith.call(doubleBackToClose: event.newValue);
+      },
     );
 
     yield s;
   }
+
+  bool doubleBackToClose() => _settingsService.doubleBackToClose;
 }

lib/application/settings/settings_event.dart

@@ -3,6 +3,7 @@ part of 'settings_bloc.dart';
 @freezed
 abstract class SettingsEvent with _$SettingsEvent {
   const factory SettingsEvent.init() = _Init;
+
   const factory SettingsEvent.themeChanged({
     @required AppThemeType newValue,
   }) = _ThemeChanged;
@@ -26,4 +27,8 @@ abstract class SettingsEvent with _$SettingsEvent {
   const factory SettingsEvent.serverResetTimeChanged({
     @required AppServerResetTimeType newValue,
   }) = _ServerResetTimeChanged;
+
+  const factory SettingsEvent.doubleBackToCloseChanged({
+    @required bool newValue,
+  }) = _DoubleBackToCloseChanged;
 }

lib/application/settings/settings_state.dart

@@ -11,5 +11,6 @@ abstract class SettingsState with _$SettingsState {
     @required bool showCharacterDetails,
     @required bool showWeaponDetails,
     @required AppServerResetTimeType serverResetTime,
+    @required bool doubleBackToClose,
   }) = _LoadedState;
 }

lib/domain/models/settings/app_settings.dart

@@ -18,6 +18,7 @@ abstract class AppSettings implements _$AppSettings {
     @required bool showWeaponDetails,
     @required bool isFirstInstall,
     @required AppServerResetTimeType serverResetTime,
+    @required bool doubleBackToClose,
   }) = _AppSettings;
   const AppSettings._();
 

lib/domain/services/settings_service.dart

@@ -25,5 +25,8 @@ abstract class SettingsService {
   AppServerResetTimeType get serverResetTime;
   set serverResetTime(AppServerResetTimeType time);
 
+  bool get doubleBackToClose;
+  set doubleBackToClose(bool value);
+
   Future<void> init();
 }

lib/infrastructure/settings_service.dart

@@ -14,6 +14,7 @@ class SettingsServiceImpl extends SettingsService {
   final _showCharacterDetailsKey = 'ShowCharacterDetailsKey';
   final _showWeaponDetailsKey = 'ShowWeaponDetailsKey';
   final _serverResetTimeKey = 'ServerResetTimeKey';
+  final _doubleBackToCloseKey = 'DoubleBackToCloseKey';
 
   bool _initialized = false;
 
@@ -62,6 +63,12 @@ class SettingsServiceImpl extends SettingsService {
   @override
   set serverResetTime(AppServerResetTimeType time) => _prefs.setInt(_serverResetTimeKey, time.index);
 
+  @override
+  bool get doubleBackToClose => _prefs.getBool(_doubleBackToCloseKey);
+
+  @override
+  set doubleBackToClose(bool value) => _prefs.setBool(_doubleBackToCloseKey, value);
+
   @override
   AppSettings get appSettings => AppSettings(
         appTheme: appTheme,
@@ -72,6 +79,7 @@ class SettingsServiceImpl extends SettingsService {
         showWeaponDetails: showWeaponDetails,
         isFirstInstall: isFirstInstall,
         serverResetTime: serverResetTime,
+        doubleBackToClose: doubleBackToClose,
       );
 
   SettingsServiceImpl(this._logger);
@@ -121,6 +129,11 @@ class SettingsServiceImpl extends SettingsService {
       serverResetTime = AppServerResetTimeType.northAmerica;
     }
 
+    if (_prefs.get(_doubleBackToCloseKey) == null) {
+      _logger.info(runtimeType, 'Double back to close will be set to its default (false)');
+      doubleBackToClose = false;
+    }
+
     _initialized = true;
     _logger.info(runtimeType, 'Settings were initialized successfully');
   }

lib/infrastructure/telemetry/telemetry_service.dart

@@ -97,6 +97,7 @@ class TelemetryServiceImpl implements TelemetryService {
       'ShowWeaponDetails': settings.showWeaponDetails.toString(),
       'IsFirstInstall': settings.isFirstInstall.toString(),
       'ServerResetTime': EnumToString.convertToString(settings.serverResetTime),
+      'DoubleBackToClose': settings.doubleBackToClose.toString(),
     });
   }
 

lib/l10n/intl_en.arb

@@ -287,5 +287,6 @@
   "hilichurl": "Hilichurl",
   "fatui": "Fatui",
   "automaton": "Automaton",
-  "droppedBy": "Dropped by"
+  "droppedBy": "Dropped by",
+  "pressOnceAgainToExit": "Press once again to exit"
 }

lib/l10n/intl_es_ES.arb

@@ -287,5 +287,6 @@
   "hilichurl": "Hilichurl",
   "fatui": "Fatui",
   "automaton": "Automata",
-  "droppedBy": "Dejado por"
+  "droppedBy": "Dejado por",
+  "pressOnceAgainToExit": "Presiona una vez más para salir"
 }

lib/l10n/intl_ru.arb

@@ -154,7 +154,7 @@
   "na": "N/A",
   "mainDps": "Основной ДД",
   "supportDps": "Саппорт ДД",
-  "utility": "Помощник",
+  "utility": "Поддержка",
   "normalAttack": "Обычная Атака",
   "elementalSkill": "Элементальная способность",
   "elementalBurst": "Взрыв стихии",
@@ -237,19 +237,19 @@
   "approximate": "приблизително",
   "active": "Активно",
   "inactive": "Неактивно",
-  "gameCodes": "Коды игры",
+  "gameCodes": "Промокоды игры",
   "codes": "Коды",
   "rewards": "Награда",
-  "codeXWasCopied": "Код {value} был скопирован в буфер обмена",
-  "expiredCodes": "Просроченные коды",
-  "workingCodes": "Рабочие коды",
-  "seeAllInGameGameCodes": "Посмотрите все игровые коды, которые вы можете использовать",
+  "codeXWasCopied": "Промокод: {value} был скопирован в буфер обмена",
+  "expiredCodes": "Просроченные",
+  "workingCodes": "Рабочие",
+  "seeAllInGameGameCodes": "Посмотрите все промокоды, которые вы можете использовать в игре",
   "ingredient": "Ингредиент",
   "talent": "Талант",
-  "local": "Local",
+  "local": "Местность",
   "elementalStone": "Элементный камень",
   "jewel": "Драгоценность",
-  "checkAllMaterials": "Проверить все доступные материалы",
+  "checkAllMaterials": "Посмотреть все доступные материалы",
   "related": "Связаны между собой",
   "obtainedFrom": "Создается",
   "sessions": "Сессия",
@@ -281,12 +281,13 @@
   "markAsUnused": "Пометить как неиспользуемые",
   "monsters": "Монстры",
   "checkAllMonsters": "Посмотреть всех доступных монстров",
-  "abyssOrder": "Маги бездны",
-  "elementalLifeForm": "Элементарная существа",
+  "abyssOrder": "Маги Бездны",
+  "elementalLifeForm": "Элемнтальные существа",
   "human": "Люди",
-  "magicalBeast": "Магические существа",
+  "magicalBeast": "Мистические существа",
   "hilichurl": "Хиличурлы",
   "fatui": "Фатуи",
-  "automaton": "Механические существа",
-  "droppedBy": "Где получить"
+  "automaton": "Автоматоны",
+  "droppedBy": "Где получить",
+  "pressOnceAgainToExit": "Press once again to exit"
 }

lib/l10n/intl_zh_CN.arb

@@ -288,5 +288,6 @@
   "hilichurl": "丘丘人",
   "fatui": "愚人众",
   "automaton": "自律机关",
-  "droppedBy": "掉落于"
+  "droppedBy": "掉落于",
+  "pressOnceAgainToExit": "Press once again to exit"
 }

lib/presentation/main_tab_page.dart

@@ -3,6 +3,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:genshindb/application/bloc.dart';
 import 'package:genshindb/generated/l10n.dart';
 import 'package:genshindb/presentation/shared/extensions/focus_scope_node_extensions.dart';
+import 'package:genshindb/presentation/shared/utils/toast_utils.dart';
 import 'package:rate_my_app/rate_my_app.dart';
 
 import 'artifacts/artifacts_page.dart';
@@ -20,7 +21,8 @@ class MainTabPage extends StatefulWidget {
 class _MainTabPageState extends State<MainTabPage> with SingleTickerProviderStateMixin {
   bool _didChangeDependencies = false;
   TabController _tabController;
-  int _index = 2;
+  int _index;
+  final _defaultIndex = 2;
   final _pages = [
     const CharactersPage(),
     const WeaponsPage(),
@@ -29,8 +31,11 @@ class _MainTabPageState extends State<MainTabPage> with SingleTickerProviderStat
     MapPage(),
   ];
 
+  DateTime backButtonPressTime;
+
   @override
   void initState() {
+    _index = _defaultIndex;
     _tabController = TabController(
       initialIndex: _index,
       length: _pages.length,
@@ -86,13 +91,14 @@ class _MainTabPageState extends State<MainTabPage> with SingleTickerProviderStat
                 orElse: () => {},
               );
             },
-            builder: (context, state) {
-              return TabBarView(
+            builder: (context, state) => WillPopScope(
+              onWillPop: () => handleWillPop(context),
+              child: TabBarView(
                 controller: _tabController,
                 physics: const NeverScrollableScrollPhysics(),
                 children: _pages,
-              );
-            },
+              ),
+            ),
           ),
         ),
         bottomNavigationBar: BottomNavigationBar(
@@ -126,4 +132,28 @@ class _MainTabPageState extends State<MainTabPage> with SingleTickerProviderStat
       _tabController.index = index;
     });
   }
+
+  Future<bool> handleWillPop(BuildContext context) async {
+    if (_tabController.index != _defaultIndex) {
+      _gotoTab(_defaultIndex);
+      return false;
+    }
+    final settings = context.read<SettingsBloc>();
+    if (!settings.doubleBackToClose()) {
+      return true;
+    }
+
+    final s = S.of(context);
+    final now = DateTime.now();
+    final mustWait = backButtonPressTime == null || now.difference(backButtonPressTime) > ToastUtils.toastDuration;
+
+    if (mustWait) {
+      backButtonPressTime = now;
+      final fToast = ToastUtils.of(context);
+      ToastUtils.showInfoToast(fToast, s.pressOnceAgainToExit);
+      return false;
+    }
+
+    return true;
+  }
 }

lib/presentation/settings/widgets/other_settings.dart

@@ -53,6 +53,12 @@ class OtherSettings extends StatelessWidget {
                       value: settingsState.showWeaponDetails,
                       onChanged: (newVal) => context.read<SettingsBloc>().add(SettingsEvent.showWeaponDetailsChanged(newValue: newVal)),
                     ),
+                    SwitchListTile(
+                      activeColor: theme.accentColor,
+                      title: Text(s.pressOnceAgainToExit),
+                      value: settingsState.doubleBackToClose,
+                      onChanged: (newVal) => context.read<SettingsBloc>().add(SettingsEvent.doubleBackToCloseChanged(newValue: newVal)),
+                    ),
                     ListTile(
                       dense: true,
                       contentPadding: EdgeInsets.zero,

lib/presentation/shared/utils/toast_utils.dart

@@ -9,6 +9,8 @@ enum ToastType {
 }
 
 class ToastUtils {
+  static Duration toastDuration = const Duration(seconds: 2);
+
   static FToast of(BuildContext context) {
     final fToast = FToast();
     fToast.init(context);
@@ -56,7 +58,7 @@ class ToastUtils {
     toast.showToast(
       child: widget,
       gravity: ToastGravity.BOTTOM,
-      toastDuration: const Duration(seconds: 2),
+      toastDuration: toastDuration,
     );
   }