Base::countDiskFiles

protected function countDiskFiles(Disk\Folder $folder, $filter = array())
{
	$count = 0;
	if (self::isModuleAvailable('disk'))
	{
		if ($folder instanceof Disk\Folder)
		{
			$filter['=STORAGE_ID'] = $folder->getStorageId();
			$filter['=PATH_CHILD.PARENT_ID'] = $folder->getId();
			$filter['=TYPE'] = Disk\Internals\ObjectTable::TYPE_FILE;

			$count = Disk\Internals\ObjectTable::getCount($filter);
		}
	}

	return $count;
}