/**
* Extract an archive out of an item and into the hierarchy in place.
*
* @param ItemDao $itemDao item representing the archive to extract
* @param bool $deleteArchive whether to delete the archive item when finished extraction
* @param UserDao $user user DAO
* @param null|ProgressDao $progressDao progress DAO
* @return FolderDao
* @throws Zend_Exception
*/
public function extractInPlace($itemDao, $deleteArchive, $user, $progressDao = null)
{
$this->Item = MidasLoader::loadModel('Item');
$this->Folder = MidasLoader::loadModel('Folder');
$this->Folderpolicyuser = MidasLoader::loadModel('Folderpolicyuser');
$this->Folderpolicygroup = MidasLoader::loadModel('Folderpolicygroup');
$this->Progress = MidasLoader::loadModel('Progress');
$this->Setting = MidasLoader::loadModel('Setting');
$this->UploadComponent = MidasLoader::loadComponent('Upload');
$this->user = $user;
$rev = $this->Item->getLastRevision($itemDao);
if (!$rev) {
throw new Zend_Exception('This item has no revisions');
}
$bitstreams = $rev->getBitstreams();
if (count($bitstreams) !== 1) {
throw new Zend_Exception('Head revision must have only one bitstream');
}
if ($progressDao) {
$this->Progress->updateProgress($progressDao, 0, 'Preparing to extract archive...');
}
$bitstreamDao = $bitstreams[0];
$name = $bitstreamDao->getName();
$folders = $itemDao->getFolders();
$parentFolder = $folders[0];
// First extract the archive into a temp location on disk
if ($this->_isFileExtension($name, '.zip')) {
$extractedPath = $this->_extractZip($bitstreamDao, $progressDao);
} else {
throw new Zend_Exception('This file is not a supported archive type');
}
// Next create the hierarchy from the temp location
if ($progressDao) {
$this->Progress->updateProgress($progressDao, 0, 'Adding items to Midas tree...');
}
$this->_addToHierarchy($extractedPath, $parentFolder, $progressDao);
// Clean up the dirs we made in the temp directory
UtilityComponent::rrmdir($extractedPath);
// Finally, delete existing archive item if user has specified to do so
if ($deleteArchive) {
if ($progressDao) {
$progressDao->setMessage('Deleting old archive...');
$this->Progress->save($progressDao);
}
$this->Item->delete($itemDao);
}
return $parentFolder;
}