feat + refactor: добавление возможности восстановления покупок пользователем для устройств на ios

Author: neekeetuh

frontend/lib/common/shared_functions.dart

@@ -1,8 +1,22 @@
 import 'package:flutter/material.dart';
+import 'package:frontend/constants/text_styles.dart';
 
 sealed class SharedFunctions {
   static bool isTablet(BuildContext context) {
     final shortestSide = MediaQuery.of(context).size.shortestSide;
     return shortestSide >= 640;
   }
+
+  static void showSnackBar(BuildContext context, String text) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        backgroundColor: Colors.black,
+        content: Text(
+          text,
+          style: TextStyles.caption2,
+        ),
+        duration: const Duration(seconds: 2),
+      ),
+    );
+  }
 }

frontend/lib/data_sources/in_app_purchase_data_source.dart

@@ -1,4 +1,5 @@
 abstract interface class IInAppPurchaseDataSource {
   Future<bool> buyProduct(String productId);
   Future<bool> checkStatus(String productId);
+  Future<bool> restorePurchases();
 }

frontend/lib/data_sources/revenuecat_data_source.dart

@@ -15,4 +15,14 @@ class RevenueCatDataSource implements IInAppPurchaseDataSource {
     final customerInfo = await Purchases.getCustomerInfo();
     return customerInfo.entitlements.active.containsKey(productId);
   }
+
+  @override
+  Future<bool> restorePurchases() async {
+    try {
+      await Purchases.restorePurchases();
+      return true;
+    } catch (_) {
+      return false;
+    }
+  }
 }

frontend/lib/l10n/en.arb

@@ -105,5 +105,7 @@
     "hintsModal": "Display of hints\nfor possible moves",
     "description": "Description",
     "price": "1.99 $",
-    "purchaseError": "Could not buy the product. Try again later"
+    "purchaseError": "Could not buy the product. Try again later",
+    "restorePurchases": "Restore Purchases",
+    "restorePurchasesError": "Could not restore purchases. Try again later"
 }

frontend/lib/l10n/ru.arb

@@ -105,5 +105,7 @@
     "hintsModal": "Отображение подсказок\nвозможных ходов",
     "description": "Описание",
     "price": "199 ₽",
-    "purchaseError": "Ошибка покупки товара. Попробуйте позже"
+    "purchaseError": "Ошибка покупки товара. Попробуйте позже",
+    "restorePurchases": "Восстановить покупки",
+    "restorePurchasesError": "Ошибка восстановления покупок. Попробуйте позже"
 }

frontend/lib/providers/pro_version_provider.dart

@@ -7,6 +7,7 @@ class ProVersionProvider extends ChangeNotifier {
 
   bool _isProStatus = false;
   bool _isPurchaseError = false;
+  bool _isRestoreError = false;
 
   final InAppPurchaseRepository _repository;
 
@@ -21,15 +22,23 @@ class ProVersionProvider extends ChangeNotifier {
   }
 
   void _setProStatus(bool status) {
+    if (_isProStatus == status) return;
     _isProStatus = status;
     notifyListeners();
   }
 
   void _setPurchaseError(bool isError) {
+    if (_isPurchaseError == isError) return;
     _isPurchaseError = isError;
     notifyListeners();
   }
 
+  void _setRestoreError(bool isRestoreError) {
+    if (_isRestoreError == isRestoreError) return;
+    _isRestoreError = isRestoreError;
+    notifyListeners();
+  }
+
   Future<void> upgradeToPro() async {
     try {
       await _repository.buyProduct(_proVersionKey);
@@ -47,6 +56,18 @@ class ProVersionProvider extends ChangeNotifier {
     _setProStatus(false);
   }
 
+  Future<void> restorePurchases() async {
+    final isRestoreCompleted = await _repository.restorePurchases();
+    if (isRestoreCompleted) {
+      _setRestoreError(false);
+    } else {
+      _setRestoreError(true);
+      await Future.delayed(const Duration(milliseconds: 100));
+      _setRestoreError(false);
+    }
+  }
+
   bool get isPro => _isProStatus;
   bool get isPurchaseError => _isPurchaseError;
+  bool get isRestoreError => _isRestoreError;
 }

frontend/lib/repositories/in_app_purchase_repository.dart

@@ -14,4 +14,8 @@ class InAppPurchaseRepository {
   Future<bool> checkStatus(String productId) {
     return _dataSource.checkStatus(productId);
   }
+
+  Future<bool> restorePurchases() {
+    return _dataSource.restorePurchases();
+  }
 }

frontend/lib/views/components/components.dart

@@ -4,3 +4,4 @@ export "custom_icon_button.dart";
 export "loading_widget.dart";
 export "custom_tab_bar.dart";
 export 'pro_functions_tooltip.dart';
+export 'custom_button.dart';

frontend/lib/views/components/custom_button.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:frontend/constants/gradient_consts.dart';
+
+class CustomButton extends StatelessWidget {
+  const CustomButton({
+    super.key,
+    required this.onTap,
+    required this.child,
+    this.borderRadius = 16,
+    this.gradient = GradientConsts.orange,
+  });
+
+  final VoidCallback onTap;
+  final Widget child;
+  final double borderRadius;
+  final Gradient gradient;
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: onTap,
+      child: DecoratedBox(
+        decoration: BoxDecoration(
+          borderRadius: BorderRadius.circular(borderRadius),
+          gradient: gradient,
+        ),
+        child: Center(child: child),
+      ),
+    );
+  }
+}

frontend/lib/views/menu_view/components/menu_app_bar.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:frontend/common/shared_functions.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
@@ -21,16 +22,8 @@ class MenuAppBar extends StatelessWidget {
     final isPro = provider.isPro;
     if (provider.isPurchaseError) {
       WidgetsBinding.instance.addPostFrameCallback((_) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            backgroundColor: Colors.black,
-            content: Text(
-              AppLocalizations.of(context).purchaseError,
-              style: TextStyles.caption2,
-            ),
-            duration: const Duration(seconds: 2),
-          ),
-        );
+        SharedFunctions.showSnackBar(
+            context, AppLocalizations.of(context).purchaseError);
       });
     }
     return Row(