/**
* Method returns an array with one or two buttons for browsing the collections during publication.
* The buttons have been added to the current Zend_Form.
*
* Wird nur für Collection Roles aufgerufen.
*
* @return <Array> of button names
*/
private function browseButtons()
{
$displayGroup = array();
//show browseDown button only for the last select field
$level = (int) count($this->collectionIds);
try {
$collection = new Opus_Collection($this->collectionIds[$level - 1]);
} catch (Exception $e) {
// TODO improve exception handling
return null;
}
if ($collection->hasVisiblePublishChildren()) {
$downButton = $this->addDownButtontoGroup();
$this->form->addElement($downButton);
$displayGroup[] = $downButton->getName();
}
$isRoot = $collection->isRoot();
if (!$isRoot && !is_null($this->collectionIds[0])) {
// collection has parents -> make button to browse up
$upButton = $this->addUpButtontoGroup();
$this->form->addElement($upButton);
$displayGroup[] = $upButton->getName();
}
return $displayGroup;
}