/**
* Get unused filename by appending suffix
*
* @static
* @param int $itemid
* @param string $filepath
* @param string $filename
* @return string
*/
public static function get_unused_filename($itemid, $filepath, $filename)
{
global $USER;
$fs = get_file_storage();
while (repository::draftfile_exists($itemid, $filepath, $filename)) {
$filename = repository::append_suffix($filename);
}
return $filename;
}
