Show a notification when the new Podfile is successfully saved.

Author: kizitonwose

Pods Updater/AppDelegate.swift

@@ -20,3 +20,12 @@ class AppDelegate: NSObject, NSApplicationDelegate {
 
 }
 
+// Only used by the PodfileViewController to show save success message since the PodfileViewController is dismissed
+// immediately and NotificationCenter needs a delegate to present a Notification when the app is in front.
+extension AppDelegate: NSUserNotificationCenterDelegate {
+    func userNotificationCenter(_ center: NSUserNotificationCenter,
+                                shouldPresent notification: NSUserNotification) -> Bool {
+        return true
+    }
+}
+

Pods Updater/UI/Podfile/PodfileViewController.swift

@@ -49,6 +49,15 @@ class PodfileViewController: NSViewController {
 // MARK:- PodfileContract.View
 extension PodfileViewController: PodfileContract.View {
     func showPodfileSaveSuccess() {
+        let notification = NSUserNotification()
+        notification.title = "Success!"
+        notification.informativeText = "Your new Podfile has been saved successfully."
+        notification.deliveryDate = Date()
+        
+        let center = NSUserNotificationCenter.default
+        center.delegate = NSApplication.shared.delegate as? AppDelegate
+        center.deliver(notification)
+        
         view.window?.close()
     }