/**
* Return a URL to a thumbnail preview of the record, if available; false
* otherwise.
*
* @param array $size Size of thumbnail (small, medium or large -- small is
* default).
*
* @return mixed
* @access public
*/
public function getThumbnail($size = 'small')
{
global $configArray;
foreach ($this->marcRecord->getFields('856') as $url) {
$type = $url->getSubfield('q');
if ($type) {
$type = $type->getData();
if ("IMAGE" == $type || "image/jpeg" == $type) {
$address = $url->getSubfield('u');
if ($address && $this->urlAllowed($address->getData())) {
return $configArray['Site']['url'] . '/thumbnail.php?id=' . urlencode($this->getUniqueID()) . '&size=' . urlencode($size);
}
}
}
}
return parent::getThumbnail($size);
}
