Add confirmation message after importing backup

NineAnimator/Controllers/RootViewController.swift

@@ -24,12 +24,23 @@ class RootViewController: UITabBarController, Themable {
 
     private weak var castControllerDelegate: AnyObject?
 
+    /// The top view controller visible by the user
     private var topViewController: UIViewController {
-        var topViewController: UIViewController = self
-        while let next = topViewController.presentedViewController {
-            topViewController = next
+        var topController: UIViewController = self
+        while true {
+            if let presentedController = topController.presentedViewController {
+                topController = presentedController
+            } // Special case for UINavigationController
+            else if let nav = topController as? UINavigationController,
+                    let presentedController = nav.visibleViewController {
+                topController = presentedController
+            } // Special case for UITabBarController
+            else if let tab = topController as? UITabBarController,
+                    let presentedController = tab.selectedViewController {
+                topController = presentedController
+            } else { break }
         }
-        return topViewController
+        return topController
     }
 
     override func viewDidLoad() {
@@ -203,9 +214,9 @@ extension RootViewController {
             if let navigationController = viewController.navigationController {
                 navigationController.pushViewController(targetViewController, animated: true)
             } else { viewController.present(targetViewController, animated: true) }
-        } else { // If no view controller is provided, present the link in the featured tab
-            // Jump to Featured tab
-            selectedIndex = 0
+        } else {
+            // If no view controller is provided, present the link in the watch next tab
+            navigate(toScene: .toWatch)
 
             guard let navigationController = viewControllers?.first as? ApplicationNavigationController else {
                 Log.error("The first view controller is not ApplicationNavigationController.")
@@ -242,8 +253,8 @@ extension RootViewController {
 
     fileprivate func _restore(_ config: URL) {
         let alert = UIAlertController(
-            title: "Import Configurations",
-            message: "How do you want to import this configuration?",
+            title: "Import Backup",
+            message: "How do you want to import this backup?",
             preferredStyle: .alert
         )
 
@@ -256,10 +267,22 @@ extension RootViewController {
             presentOnTop(errorAlert)
         }
 
+        func showConfirmationMessage() {
+            let confirmationAlert = UIAlertController(
+                title: "Backup Imported",
+                message: "Backup was imported successfully",
+                preferredStyle: .alert
+            )
+
+            confirmationAlert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
+            presentOnTop(confirmationAlert)
+        }
+
         alert.addAction(UIAlertAction(title: "Replace Current", style: .destructive) {
             _ in
             do {
                 try replace(NineAnimator.default.user, with: config)
+                showConfirmationMessage()
             } catch {
                 showErrorAlert(error: error)
             }
@@ -269,6 +292,7 @@ extension RootViewController {
             _ in
             do {
                 try merge(NineAnimator.default.user, with: config, policy: .localFirst)
+                showConfirmationMessage()
             } catch {
                 showErrorAlert(error: error)
             }
@@ -278,6 +302,7 @@ extension RootViewController {
             _ in
             do {
                 try merge(NineAnimator.default.user, with: config, policy: .remoteFirst)
+                showConfirmationMessage()
             } catch {
                 showErrorAlert(error: error)
             }