Added loading indicator for data migration

Author: mattbarker016

TCAT/AppDelegate.swift

@@ -71,12 +71,14 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
             CustomNavigationController(rootViewController: rootVC)
 
         // v1.2.2 Data Migration
-        print("Begin Data Migration")
-        if VersionStore.shared.savedAppVersion <= WhatsNew.Version(major: 1, minor: 2, patch: 1) {
+        if
+            VersionStore.shared.savedAppVersion <= WhatsNew.Version(major: 1, minor: 2, patch: 1),
+            let homeViewController = rootVC as? HomeViewController
+        {
+            print("Begin Data Migration")
+            homeViewController.showLoadingScreen()
             migrationToNewPlacesModel { (success, errorDescription) in
-                if let homeViewController = rootVC as? HomeViewController {
-                    homeViewController.viewWillAppear(false)
-                }
+                homeViewController.removeLoadingScreen()
                 print("Data Migration Complete - Success: \(success), Error: \(errorDescription ?? "n/a")")
                 let payload = DataMigrationOnePointThreePayload(success: success, errorDescription: errorDescription)
                 Analytics.shared.log(payload)

TCAT/Controllers/HomeViewController.swift

@@ -297,6 +297,33 @@ class HomeViewController: UIViewController {
         let navigationVC = CustomNavigationController(rootViewController: informationViewController)
         present(navigationVC, animated: true)
     }
+    
+    var loadingView = UIView()
+    
+    /// Show a temporary loading screen
+    func showLoadingScreen() {
+        
+        loadingView.backgroundColor = Colors.backgroundWash
+        view.addSubview(loadingView)
+        
+        loadingView.snp.makeConstraints { (make) in
+            make.top.bottom.leading.trailing.equalToSuperview()
+        }
+        
+        let indicator = LoadingIndicator()
+        loadingView.addSubview(indicator)
+        indicator.snp.makeConstraints { (make) in
+            make.center.equalToSuperview()
+            make.width.height.equalTo(40)
+        }
+        
+    }
+    
+    func removeLoadingScreen() {
+        loadingView.removeFromSuperview()
+        viewWillAppear(false)
+    }
+    
 }
 
 // MARK: TableView DataSource