Add localized error message for paymentNotAllowed SKError

Author: tobihagemann

Cryptomator/Purchase/IAPViewController.swift

@@ -226,6 +226,8 @@ class BaseIAPViewModel {
 		return iapManager.buy(product).recover { error -> PurchaseTransaction in
 			if (error as? SKError)?.code == .paymentCancelled {
 				throw PurchaseError.paymentCancelled
+			} else if (error as? SKError)?.code == .paymentNotAllowed {
+				throw PurchaseError.paymentNotAllowed
 			} else if (error as? SKError)?.code == .unknown {
 				throw PurchaseError.unknown
 			} else {
@@ -279,6 +281,8 @@ class BaseIAPViewModel {
 		return iapManager.restore().recover { error -> RestoreTransactionsResult in
 			if (error as? SKError)?.code == .paymentCancelled {
 				throw PurchaseError.paymentCancelled
+			} else if (error as? SKError)?.code == .paymentNotAllowed {
+				throw PurchaseError.paymentNotAllowed
 			} else if (error as? SKError)?.code == .unknown {
 				throw PurchaseError.unknown
 			} else {

Cryptomator/Purchase/PurchaseViewModel.swift

@@ -14,6 +14,7 @@ import StoreKit
 enum PurchaseError: LocalizedError {
 	case unavailableProduct
 	case paymentCancelled
+	case paymentNotAllowed
 	case unknown
 
 	var errorDescription: String? {
@@ -22,6 +23,8 @@ enum PurchaseError: LocalizedError {
 			return nil // should never happen
 		case .paymentCancelled:
 			return nil // not needed since nothing should be shown
+		case .paymentNotAllowed:
+			return LocalizedString.getValue("purchase.error.paymentNotAllowed")
 		case .unknown:
 			return LocalizedString.getValue("purchase.error.unknown")
 		}

SharedResources/en.lproj/Localizable.strings

@@ -197,6 +197,7 @@
 "purchase.title" = "Unlock Full Version";
 "purchase.unlockedFullVersion.message" = "You can now use the full version of Cryptomator. Happy crypting!";
 "purchase.unlockedFullVersion.title" = "Thank You";
+"purchase.error.paymentNotAllowed" = "In-app purchases are not allowed on this device. Please check your Screen Time settings under Content & Privacy Restrictions to enable purchases.";
 "purchase.error.unknown" = "This purchase is unavailable in the App Store for an unknown reason. Please try again later.\n\nIf this error persists, try to restart your device or signing out and back in to your Apple ID in the iOS settings.";
 
 "settings.title" = "Settings";