Fix brave/brave-ios#8353: Add Subscription Custom Offer Codes Interac…

…tion (brave/brave-ios#8354)

Sources/Brave/Frontend/Settings/SettingsViewController.swift

@@ -612,7 +612,7 @@ class SettingsViewController: TableViewController {
           case .notPurchased, .expired:
             return BraveVPN.vpnState.enableVPNDestinationVC
           case .purchased:
-            let vc = BraveVPNSettingsViewController()
+            let vc = BraveVPNSettingsViewController(iapObserver: BraveVPN.iapObserver)
             vc.openURL = { [unowned self] url in
               self.settingsDelegate?.settingsOpenURLInNewTab(url)
               self.dismiss(animated: true)
@@ -623,7 +623,18 @@ class SettingsViewController: TableViewController {
         }()
 
         guard let vcToShow = vc else { return }
-        self.navigationController?.pushViewController(vcToShow, animated: true)
+
+        if VPNProductInfo.isComplete {
+          self.navigationController?.pushViewController(vcToShow, animated: true)
+        } else {
+          let alert = UIAlertController(
+            title: Strings.VPN.errorCantGetPricesTitle,
+            message: Strings.VPN.errorCantGetPricesBody,
+            preferredStyle: .alert)
+
+          alert.addAction(UIAlertAction(title: Strings.OKString, style: .default, handler: nil))
+          self.present(alert, animated: true, completion: nil)
+        }
       },
       image: Preferences.VPN.vpnReceiptStatus.value == BraveVPN.ReceiptResponse.Status.retryPeriod.rawValue
         ? UIImage(braveSystemNamed: "leo.warning.triangle-filled")?

Sources/BraveStrings/BraveStrings.swift

@@ -2820,6 +2820,11 @@ extension Strings {
         value: "Manage Subscription",
         comment: "Button to manage your VPN subscription")
 
+    public static let settingsRedeemOfferCode =
+      NSLocalizedString("vpn.settingsManageSubscription", tableName: "BraveShared", bundle: .module,
+        value: "Redeem Offer Code",
+        comment: "Button to redeem offer code subscription")
+
     public static let settingsLinkReceipt =
       NSLocalizedString("vpn.settingsLinkReceipt", tableName: "BraveShared", bundle: .module,
         value: "Link purchase to your Brave account",
@@ -2904,6 +2909,11 @@ extension Strings {
       NSLocalizedString("vpn.vpnConfigPermissionDeniedErrorTitle", tableName: "BraveShared", bundle: .module,
         value: "Permission denied",
         comment: "Title for an alert when the user didn't allow to install VPN profile")
+
+    public static let vpnRedeemCodeButtonActionTitle =
+      NSLocalizedString("vpn.vpnRedeemCodeButtonActionTitle", tableName: "BraveShared", bundle: .module,
+        value: "Redeem Code",
+        comment: "Title for a button for enabling the Redeem Code flow")
 
     public static let vpnConfigPermissionDeniedErrorBody =
       NSLocalizedString("vpn.vpnConfigPermissionDeniedErrorBody", tableName: "BraveShared", bundle: .module,
@@ -2929,6 +2939,11 @@ extension Strings {
       NSLocalizedString("vpn.vpnErrorPurchaseFailedBody", tableName: "BraveShared", bundle: .module,
         value: "Unable to complete purchase. Please try again, or check your payment details on Apple and try again.",
         comment: "Message for error when VPN could not be purchased.")
+
+    public static let vpnErrorOfferCodeFailedBody =
+      NSLocalizedString("vpn.vpnErrorOfferCodeFailedBody", tableName: "BraveShared", bundle: .module,
+        value: "Unable to redeem offer code. Please try again, or check your offer code details and try again.",
+        comment: "Message for error when VPN offer code could not be redeemed.")
 
     public static let vpnResetAlertTitle =
       NSLocalizedString("vpn.vpnResetAlertTitle", tableName: "BraveShared", bundle: .module,

Sources/BraveVPN/BraveVPNSettingsViewController.swift

@@ -15,8 +15,11 @@ import GuardianConnect
 public class BraveVPNSettingsViewController: TableViewController {
 
   public var openURL: ((URL) -> Void)?
+  let iapObserver: IAPObserver
+
+  public init(iapObserver: IAPObserver) {
+    self.iapObserver = iapObserver
 
-  public init() {
     super.init(style: .grouped)
   }
 
@@ -146,6 +149,13 @@ public class BraveVPNSettingsViewController: TableViewController {
                              UIApplication.shared.open(url, options: [:])
                            }
                        },
+                       cellClass: ButtonCell.self),
+                   Row(text: Strings.VPN.settingsRedeemOfferCode,
+                       selection: {
+                        self.isLoading = false
+                        // Open the redeem code sheet
+                        SKPaymentQueue.default().presentCodeRedemptionSheet()
+                       },
                        cellClass: ButtonCell.self)
             ] + linkReceiptRows,
             footer: .title(Strings.VPN.settingsLinkReceiptFooter))
@@ -339,3 +349,42 @@ public class BraveVPNSettingsViewController: TableViewController {
     isLoading = false
   }
 }
+
+// MARK: - IAPObserverDelegate
+
+extension BraveVPNSettingsViewController: IAPObserverDelegate {
+  public func purchasedOrRestoredProduct(validateReceipt: Bool) {
+    DispatchQueue.main.async {
+      self.isLoading = false
+    }
+
+    if validateReceipt {
+      BraveVPN.validateReceiptData()
+    }
+  }
+
+  public func purchaseFailed(error: IAPObserver.PurchaseError) {
+    // Handle Offer Code error
+    guard isLoading else {
+      return
+    }
+
+    handleOfferCodeError(error: error)
+  }
+
+  private func handleOfferCodeError(error: IAPObserver.PurchaseError) {
+    DispatchQueue.main.async {
+      self.isLoading = false
+
+      let message = Strings.VPN.vpnErrorOfferCodeFailedBody
+
+      let alert = UIAlertController(
+        title: Strings.VPN.vpnErrorPurchaseFailedTitle,
+        message: message,
+        preferredStyle: .alert)
+      let ok = UIAlertAction(title: Strings.OKString, style: .default, handler: nil)
+      alert.addAction(ok)
+      self.present(alert, animated: true)
+    }
+  }
+}

Sources/BraveVPN/BuyVPNViewController.swift

@@ -44,15 +44,15 @@ class BuyVPNViewController: VPNSetupLoadingController {
       title: Strings.VPN.restorePurchases, style: .done,
       target: self, action: #selector(restorePurchasesAction))
 
-    let actionTitle = Preferences.VPN.freeTrialUsed.value
+    let buyTitle = Preferences.VPN.freeTrialUsed.value
       ? Strings.VPN.activateSubscriptionAction.capitalized
       : Strings.VPN.freeTrialPeriodAction.capitalized
 
-    let actionButton = BraveGradientButton(gradient: .backgroundGradient1).then {
+    let buyButton = BraveGradientButton(gradient: .backgroundGradient1).then {
       $0.titleLabel?.font = .systemFont(ofSize: 15, weight: .bold)
       $0.titleLabel?.textAlignment = .center
 
-      $0.setTitle(actionTitle, for: .normal)
+      $0.setTitle(buyTitle, for: .normal)
 
       $0.snp.makeConstraints {
         $0.height.equalTo(50)
@@ -66,7 +66,15 @@ class BuyVPNViewController: VPNSetupLoadingController {
 
       $0.addTarget(self, action: #selector(startSubscriptionAction), for: .touchUpInside)
     }
-
+
+    let redeemButton = UIButton().then {
+      $0.setTitle(Strings.VPN.vpnRedeemCodeButtonActionTitle, for: .normal)
+      $0.titleLabel?.font = .systemFont(ofSize: 13, weight: .medium)
+      $0.titleLabel?.textAlignment = .center
+
+      $0.addTarget(self, action: #selector(redeemOfferSubscriptionCode), for: .touchUpInside)
+    }
+
     let seperator = UIView().then {
       $0.backgroundColor = UIColor.white.withAlphaComponent(0.1)
       $0.snp.makeConstraints { make in
@@ -76,7 +84,8 @@ class BuyVPNViewController: VPNSetupLoadingController {
 
     view.addSubview(buyVPNView)
     view.addSubview(seperator)
-    view.addSubview(actionButton)
+    view.addSubview(buyButton)
+    view.addSubview(redeemButton)
 
     buyVPNView.snp.makeConstraints {
       $0.leading.trailing.top.equalToSuperview()
@@ -87,9 +96,15 @@ class BuyVPNViewController: VPNSetupLoadingController {
       $0.leading.trailing.equalToSuperview()
     }
 
-    actionButton.snp.makeConstraints() {
+    buyButton.snp.makeConstraints() {
       $0.top.equalTo(seperator.snp.bottom).inset(-12)
-      $0.leading.trailing.bottom.equalToSuperview().inset(24)
+      $0.leading.trailing.equalToSuperview().inset(24)
+    }
+
+    redeemButton.snp.makeConstraints() {
+      $0.top.equalTo(buyButton.snp.bottom).inset(-12)
+      $0.bottom.equalToSuperview().inset(24)
+      $0.centerX.equalToSuperview()
     }
 
     buyVPNView.monthlySubButton
@@ -154,6 +169,11 @@ class BuyVPNViewController: VPNSetupLoadingController {
     addPaymentForSubcription(type: activeSubcriptionChoice)
   }
 
+  @objc func redeemOfferSubscriptionCode() {
+    // Open the redeem code sheet
+    SKPaymentQueue.default().presentCodeRedemptionSheet()
+  }
+
   private func addPaymentForSubcription(type: SubscriptionType) {
     var subscriptionProduct: SKProduct?