Refactors LaunchViewController into RSTLaunchViewController subclass

Delta/AppDelegate.swift

@@ -36,11 +36,6 @@ class AppDelegate: UIResponder, UIApplicationDelegate
             gestureRecognizer.delaysTouchesBegan = false
         }
         
-        // Database
-        DatabaseManager.shared.start { (error) in
-            print("Database started with error:", error as Any)
-        }
-        
         // Controllers
         ExternalGameControllerManager.shared.startMonitoring()
         

Delta/Database/DatabaseManager.swift

@@ -74,6 +74,8 @@ final class DatabaseManager: RSTPersistentContainer
         else { fatalError("Core Data model cannot be found. Aborting.") }
         
         super.init(name: "Delta", managedObjectModel: harmonyModel)
+        
+        self.shouldAddStoresAsynchronously = true
     }
 }
 

Delta/Launch/LaunchViewController.swift

@@ -9,7 +9,7 @@
 import UIKit
 import Roxas
 
-class LaunchViewController: UIViewController
+class LaunchViewController: RSTLaunchViewController
 {
     @IBOutlet private var gameViewContainerView: UIView!
     private var gameViewController: GameViewController!
@@ -37,12 +37,39 @@ class LaunchViewController: UIViewController
         NotificationCenter.default.addObserver(self, selector: #selector(LaunchViewController.deepLinkControllerLaunchGame(with:)), name: .deepLinkControllerLaunchGame, object: nil)
     }
     
-    override func viewDidAppear(_ animated: Bool)
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?)
     {
-        super.viewDidAppear(animated)
+        guard segue.identifier == "embedGameViewController" else { return }
         
-        if !self.presentedGameViewController
+        self.gameViewController = segue.destination as? GameViewController
+    }
+}
+
+extension LaunchViewController
+{
+    override var launchConditions: [RSTLaunchCondition] {
+        let isDatabaseManagerStarted = RSTLaunchCondition(condition: { DatabaseManager.shared.isStarted }) { (completionHandler) in
+            DatabaseManager.shared.start(completionHandler: completionHandler)
+        }
+
+        return [isDatabaseManagerStarted, isDatabaseManagerStarted]
+    }
+    
+    override func handleLaunchError(_ error: Error)
     {
+        let alertController = UIAlertController(title: NSLocalizedString("Unable to Launch Delta", comment: ""), message: error.localizedDescription, preferredStyle: .alert)
+        alertController.addAction(UIAlertAction(title: NSLocalizedString("Retry", comment: ""), style: .default, handler: { (action) in
+            self.handleLaunchConditions()
+        }))
+        self.present(alertController, animated: true, completion: nil)
+    }
+    
+    override func finishLaunching()
+    {
+        super.finishLaunching()
+        
+        guard !self.presentedGameViewController else { return }
+        
         self.presentedGameViewController = true
         
         func showGameViewController()
@@ -69,14 +96,6 @@ class LaunchViewController: UIViewController
             })
         }
     }
-    }
-    
-    override func prepare(for segue: UIStoryboardSegue, sender: Any?)
-    {
-        guard segue.identifier == "embedGameViewController" else { return }
-        
-        self.gameViewController = segue.destination as? GameViewController
-    }
 }
 
 private extension LaunchViewController