Present new joke reader on already presented controller

BadJokes/AppDelegate.swift

@@ -61,11 +61,10 @@ extension AppDelegate: UNUserNotificationCenterDelegate {
 // MARK: Deeplinking
 extension AppDelegate {
     private func deeplinkToJokeReader(with jokeText: String) {
-        guard let jokeReaderViewController = JokeReaderViewController.instantiate(with: jokeText),
-            let navigationController = (window?.rootViewController as? UINavigationController) else {
-                return
+        guard let jokeReaderViewController = JokeReaderViewController.instantiate(with: jokeText) else {
+            return
         }
 
-        navigationController.present(jokeReaderViewController, animated: true)
+        UIApplication.topMostViewController()?.present(jokeReaderViewController, animated: true)
     }
 }

BadJokes/Extensions/UIApplicationExtensions.swift

@@ -9,12 +9,27 @@
 import UIKit
 
 extension UIApplication {
-    public static func openSettings() {
+    static func openSettings() {
         guard let url = URL(string: UIApplication.openSettingsURLString), UIApplication.shared.canOpenURL(url) else {
             debugPrint("Cannot open 'UIApplication.openSettingsURLString'")
             return
         }
 
         UIApplication.shared.open(url)
     }
+
+    // swiftlint:disable line_length
+    class func topMostViewController(base: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
+        if let navigationController = base as? UINavigationController {
+            return topMostViewController(base: navigationController.visibleViewController)
+
+        } else if let tabBarController = base as? UITabBarController, let selected = tabBarController.selectedViewController {
+            return topMostViewController(base: selected)
+
+        } else if let presented = base?.presentedViewController {
+            return topMostViewController(base: presented)
+        }
+
+        return base
+    }
 }