/**
* Delete an itemrevision from an item, will reduce all other
* itemrevision revision numbers appropriately.
*
* @param ItemDao $itemdao
* @param ItemRevisionDao $revisiondao
* @throws Zend_Exception
*/
public function removeRevision($itemdao, $revisiondao)
{
if (!$itemdao instanceof ItemDao) {
throw new Zend_Exception('First argument should be an item');
}
if (!$revisiondao instanceof ItemRevisionDao) {
throw new Zend_Exception('Second argument should be an item revision');
}
if ($revisiondao->getItemId() != $itemdao->getItemId()) {
throw new Zend_Exception('Revision needs to be associated with Item');
}
/** @var ItemRevisionModel $itemRevisionModel */
$itemRevisionModel = MidasLoader::loadModel('ItemRevision');
$lastRevisionDao = $this->getLastRevision($itemdao);
$numRevisions = $lastRevisionDao->getRevision();
$deletedRevisionNum = $revisiondao->getRevision();
$itemRevisionModel->delete($revisiondao);
// compact the revision numbers if necessary
if ($deletedRevisionNum < $numRevisions) {
// reach past the deleted revision, reduce each revision number by 1
$revisions = range($deletedRevisionNum + 1, $numRevisions);
foreach ($revisions as $revision) {
$itemRevisionDao = $this->getRevision($itemdao, $revision);
$itemRevisionDao->setRevision($itemRevisionDao->getRevision() - 1);
$itemRevisionModel->save($itemRevisionDao);
}
}
// reload the item and last revision now that we have updated revisions
$itemId = $itemdao->getItemId();
$itemdao = $this->load($itemId);
$lastRevisionDao = $this->getLastRevision($itemdao);
// now that we have deleted a revision, recalculate size of item
if (empty($lastRevisionDao)) {
$itemdao->setSizebytes(0);
} else {
$itemdao->setSizebytes($itemRevisionModel->getSize($lastRevisionDao));
}
$this->save($itemdao, true);
}
