Landing::checkAddingInMenu

static function checkAddingInMenu(array $fields, ?bool &$willAdded = null): array
{
	$blockId = null;
	$menuCode = null;

	if (isset($fields['BLOCK_ID']))
	{
		$blockId = (int)$fields['BLOCK_ID'];
		unset($fields['BLOCK_ID']);
	}
	if (isset($fields['MENU_CODE']))
	{
		$menuCode = $fields['MENU_CODE'];
		unset($fields['MENU_CODE']);
	}

	if (!$blockId || !$menuCode || !is_string($menuCode))
	{
		return $fields;
	}

	$willAdded = true;

	LandingCore::callback('OnAfterAdd',
		function(BitrixMainEvent $event) use ($blockId, $menuCode)
		{
			$primary = $event->getParameter('primary');
			$fields = $event->getParameter('fields');

			if ($primary)
			{
				$landingId = BlockCore::getLandingIdByBlockId($blockId);
				if ($landingId)
				{
					$updateData = [
						$menuCode => [
							[
								'text' => $fields['TITLE'],
								'href' => '#landing' . $primary['ID']
							]
						]
					];
					Block::updateNodes(
						$landingId,
						$blockId,
						$updateData,
						['appendMenu' => true]
					);
				}
			}
		}
	);


	return $fields;
}