Output Warning Message in Admin when a page with children is unpublished

[Orkun]

Hi Guys

I am trying to output a warning message in the admin to the user if he unpublishes a page which has children pages.

This is the code I have inside my autoload sitehelper module.

$this->addHookBefore('Pages::unpublishReady', $this, 'notifyOnUnpublish');


public function notifyOnUnpublish(HookEvent $event) {
	$pages = $event->object;
	$page = $event->arguments(0);
	if($page->numChildren > 0) {
		$this->warning("You have unpublished a page which contains sub-pages. You need to move these sub-pages or unpublished them.");
	}
}

It works when I am on Page Edit Screen. But how can I make something like this work for the Pagetree Actions with ajax refreshing?

KR
Orkun