SiteTable::OnBeforeDelete

static function OnBeforeDelete(EntityEvent $event)
{
	if (self::$disableCallback)
	{
		return true;
	}

	$result = new EntityEventResult();
	$primary = $event->getParameter('primary');
	$siteController = self::getSiteController();

	if ($primary)
	{
		// check delete access
		$hasAccess = Rights::hasAccessForSite(
			$primary['ID'],
			Rights::ACCESS_TYPES['delete'],
			true
		);
		if (!$hasAccess)
		{
			$result->setErrors(array(
				new EntityEntityError(
					Loc::getMessage('LANDING_TABLE_ERROR_ACCESS_DENIED_DELETED'),
					'ACCESS_DENIED'
				)
			));
			return $result;
		}
		// check if site is not empty
		$res = LandingTable::getList(array(
			'select' => array(
				'ID'
			),
			'filter' => array(
				'SITE_ID' => $primary['ID'],
				'CHECK_PERMISSIONS' => 'N'
			)
		));
		if ($res->fetch())
		{
			$result->setErrors(array(
				new EntityEntityError(
					Loc::getMessage('LANDING_TABLE_ERROR_SITE_IS_NOT_EMPTY'),
					'SITE_IS_NOT_EMPTY'
				)
			));
			return $result;
		}
		// check lock status
		if (BitrixLandingLock::isSiteDeleteLocked($primary['ID']))
		{
			$result->setErrors(array(
				new EntityEntityError(
					Loc::getMessage('LANDING_TABLE_ERROR_SITE_IS_LOCK'),
					'SITE_IS_LOCK'
				)
			));
			return $result;
		}

		// delete in b24.site
		if (Manager::isB24())
		{
			$res = self::getList(array(
				'select' => array(
					'DOMAIN_ID',
					'DOMAIN_NAME' => 'DOMAIN.DOMAIN',
					'DOMAIN_PROVIDER' => 'DOMAIN.PROVIDER'
				),
				'filter' => array(
					'ID' => $primary['ID'],
					'DELETED' => ['Y', 'N'],
					'CHECK_PERMISSIONS' => 'N'
				)
			));
			if ($row = $res->fetch())
			{
				if ($row['DOMAIN_PROVIDER'] && ModuleManager::isModuleInstalled('bitrix24'))
				{
					$result->setErrors([
						new EntityEntityError(
							Loc::getMessage('LANDING_TABLE_ERROR_ACCESS_DENIED_DELETED'),
							'ACCESS_DENIED_DELETED'
						)
					]);
					return $result;
				}

				$domainId = $row['DOMAIN_ID'];
				$domainName = $row['DOMAIN_NAME'];
				$eventManager = BitrixMainEventManager::getInstance();
				$eventManager->addEventHandler(
					'landing',
					'\' . __NAMESPACE__ . '\Site::onAfterDelete',
					function(EntityEvent $event) use ($domainId, $domainName, $result, $siteController)
					{
						$res = self::getList(array(
							'select' => array(
								'ID'
							),
							'filter' => array(
								'DOMAIN_ID' => $domainId,
								'DELETED' => ['Y', 'N']
							)
						));
						if (!$res->fetch())
						{
							DomainTable::delete($domainId);
							try
							{
								$siteController::deleteDomain($domainName);
							}
							catch (SystemException $ex)
							{
								$result->setErrors(array(
						   			self::customizeControllerError($ex)
						   		));
								return $result;
							}
						}
					}
				);
			}
		}
	}

	return $result;
}