OneSignal.setNotificationWillShowInForegroundHandler(new NotificationWillShowInForegroundHandler() {
   @Override
   void notificationWillShowInForeground(OSNotificationReceivedEvent notificationReceivedEvent) {
     OSNotification notification = notificationReceivedEvent.getNotification();
     // Get custom additional data you sent with the notification
     JSONObject data = notification.getAdditionalData();

     if (/* some condition */ ) {
        // Complete with a notification means it will show
        notificationReceivedEvent.complete(notification);
     }
     else {
       // Complete with null means don't show a notification
       notificationReceivedEvent.complete(null);
    }
  }
});

let notificationWillShowInForegroundBlock: OSNotificationWillShowInForegroundBlock = { notification, completion in
  print("Received Notification: ", notification.notificationId ?? "no id")
  print("launchURL: ", notification.launchURL ?? "no launch url")
  print("content_available = \(notification.contentAvailable)")

  if notification.notificationId == "example_silent_notif" {
    // Complete with null means don't show a notification  
    completion(nil)
  } else {
    // Complete with a notification means it will show
    completion(notification)
  }
}
OneSignal.setNotificationWillShowInForegroundHandler(notificationWillShowInForegroundBlock)

id notificationWillShowInForegroundBlock = ^(OSNotification *notification, OSNotificationDisplayResponse completion) {
        NSLog(@"Received Notification - %@", notification.notificationId);
        if ([notification.notificationId isEqualToString:@"silent_notif"]) {
            completion(nil);
        } else {
            completion(notification);
        }
    };

[OneSignal setNotificationWillShowInForegroundHandler:notificationWillShowInForegroundBlock];

OneSignal.setNotificationWillShowInForegroundHandler(notificationReceivedEvent => {
  console.log("OneSignal: notification will show in foreground:", notificationReceivedEvent);
  let notification = notificationReceivedEvent.getNotification();
  console.log("notification: ", notification);
  const data = notification.additionalData
  console.log("additionalData: ", data);
  //Silence notification by calling complete() with no argument
  notificationReceivedEvent.complete(notification);
});

OneSignal.shared.setNotificationWillShowInForegroundHandler((OSNotificationReceivedEvent event) {
  // Display Notification, send null to not display, send notification to display           
  event.complete(event.notification);      
});

window.plugins.OneSignal.setNotificationWillShowInForegroundHandler(function(notificationReceivedEvent) {
  notificationReceivedEvent.complete(notificationReceivedEvent.getNotification());
});

OneSignal.Default.NotificationWillShow += onNotificationWillShow;

Notification onNotificationWillShow(Notification notification) {
    if (someCheck)
        return null; // don't show the notificaiton

    // COMING SOON - make modifications to the notification before showing
    
    return notification; // show the notification
}

OneSignal.setNotificationOpenedHandler(
   new OneSignal.OSNotificationOpenedHandler() {
     @Override
     public void notificationOpened(OSNotificationOpenedResult result) {
       String actionId = result.getAction().getActionId();
       String type = result.getAction().getType(); // "ActionTaken" | "Opened"
  
       String title = result.getNotification().getTitle();
     }
});

let notificationOpenedBlock: OSNotificationOpenedBlock = { result in
    // This block gets called when the user reacts to a notification received
    let notification: OSNotification = result.notification
    print("Message: ", notification.body ?? "empty body")
    print("badge number: ", notification.badge)
    print("notification sound: ", notification.sound ?? "No sound")
            
    if let additionalData = notification.additionalData {
        print("additionalData: ", additionalData)
        if let actionSelected = notification.actionButtons {
            print("actionSelected: ", actionSelected)
        }
        if let actionID = result.action.actionId {
            //handle the action
        }
    }
}

OneSignal.setNotificationOpenedHandler(notificationOpenedBlock)

id notificationOpenedBlock = ^(OSNotificationOpenedResult *result) {
  OSNotification* notification = result.notification;
  if (notification.additionalData) {
    if (result.action.actionId) {
      fullMessage = [fullMessage stringByAppendingString:[NSString stringWithFormat:@"\nPressed ButtonId:%@", result.action.actionId]];
    }
  }
  
[OneSignal setNotificationOpenedHandler:notificationOpenedBlock];

OneSignal.setNotificationOpenedHandler(openedEvent => {
  console.log("OneSignal: notification opened:", openedEvent);
  const { action, notification } = openedEvent;
});

OneSignal.shared.setNotificationOpenedHandler((OSNotificationOpenedResult result) {
    print('"OneSignal: notification opened: ${result}');
});

var notificationOpenedCallback = function(jsonData) {
  var notificationData = JSON.stringify(jsonData)
  console.log('notificationOpenedCallback: ' + notificationData);
};

window.plugins.OneSignal.setNotificationOpenedHandler(notificationOpenedCallback);

OneSignal.Default.NotificationOpened += onNotificationOpened;

void onNotificationOpened(NotificationOpenedResult result) {
    var notif = result.notification;
    var action = result.action;
}

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    print("iOS Native didReceiveRemoteNotification: ", userInfo.debugDescription)
    
    if let customOSPayload = userInfo["custom"] as? NSDictionary {
        if let additionalData = customOSPayload["a"] as? NSDictionary {
            print("additionalData: ", additionalData)
            if let foo = additionalData["foo"] {
                print("foo: ", foo)
            }
        }
        if let notificationId = customOSPayload["i"] {
            print("notificationId: ", notificationId)
        }
        if let launchUrl = customOSPayload["u"] {
            print("launchUrl: ", launchUrl)
        }
    }
    if let aps = userInfo["aps"] as? NSDictionary {
        if let alert = aps["alert"] as? NSDictionary {
            if let messageBody = alert["body"] {
                print("messageBody: ", messageBody)
            }
            if let messageTitle = alert["title"] {
                print("messageTitle: ", messageTitle)
            }
        }
    }
    // This block gets called when the user reacts to a notification received
    let timeInterval = Int(NSDate().timeIntervalSince1970)
    OneSignal.sendTags(["last_push_received": timeInterval])
    
    print("badge number: ", UIApplication.shared.applicationIconBadgeNumber.description)
}