/**
* _getLastMediaRevisionAt is a helperfunction to internalmedia() and _media()
* which returns an existing media revision less or equal to rev or date_at
*
* @author lisps
* @param string $media_id
* @access protected
* @return string revision ('' for current)
*/
function _getLastMediaRevisionAt($media_id)
{
if (!$this->date_at || media_isexternal($media_id)) {
return '';
}
$pagelog = new MediaChangeLog($media_id);
return $pagelog->getLastRevisionAt($this->date_at);
}
/**
* Returns a full media id
*
* @author Andreas Gohr <*****@*****.**>
*
* @param string $ns namespace which is context of id
* @param string &$page (reference) relative media id, updated to resolved id
* @param bool &$exists (reference) updated with existance of media
*/
function resolve_mediaid($ns, &$page, &$exists, $rev = '', $date_at = false)
{
$page = resolve_id($ns, $page);
if ($rev !== '' && $date_at) {
$medialog = new MediaChangeLog($page);
$medialog_rev = $medialog->getLastRevisionAt($rev);
if ($medialog_rev !== false) {
$rev = $medialog_rev;
}
}
$file = mediaFN($page, $rev);
$exists = @file_exists($file);
}
