Fixes CT push notification handled twice when app is using AppDelegate only. (#591)

Author: nishant-clevertap

LeanplumSDK/LeanplumSDK/ClassesSwift/Migration/LPCTNotificationsManager.swift

@@ -13,7 +13,7 @@ import Foundation
     // Using NSNumber since Optional Bool cannot be represented in Objective-C
     @objc public var openDeepLinksInForeground: NSNumber?
     @objc public var handleCleverTapNotificationBlock: LeanplumHandleCleverTapNotificationBlock?
-
+    private(set) var handlePushNotificationFromCleverTap = false
 
     enum NotificationEvent: String, CustomStringConvertible {
         case opened = "Open"
@@ -33,6 +33,16 @@ import Foundation
         // If the app is launched from notification and CT instance has already been created,
         // CT will handle the notification from their UIApplication didFinishLaunchingNotification observer
         if fromLaunch && MigrationManager.shared.hasLaunched {
+            // If the app is using AppDelegate only, push notification at app launched will
+            // be handled from CleverTap. Setting `handlePushNotificationFromCleverTap` to true
+            // here ensures that app is launched from killed state and using AppDelegate file only.
+            handlePushNotificationFromCleverTap = true
+            return
+        }
+        
+        if handlePushNotificationFromCleverTap && MigrationManager.shared.hasLaunched {
+            Log.info("[Wrapper] Push Notification will be handled from CleverTap: \(userInfo)")
+            handlePushNotificationFromCleverTap = false
             return
         }