65 lines
1.8 KiB
PHP
65 lines
1.8 KiB
PHP
<?php
|
|
|
|
/**
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; under version 2
|
|
* of the License (non-upgradable).
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* Copyright (c) 2017 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
|
|
*
|
|
*/
|
|
|
|
namespace oat\tao\model\taskQueue\Task;
|
|
|
|
use oat\generis\model\fileReference\FileReferenceSerializer;
|
|
use oat\oatbox\filesystem\File;
|
|
|
|
trait FileReferenceSerializerAwareTrait
|
|
{
|
|
/**
|
|
* @return FileReferenceSerializer
|
|
*/
|
|
abstract protected function getFileReferenceSerializer();
|
|
|
|
/**
|
|
* Checks if it's a serialized file reference.
|
|
*
|
|
* @param string $serial
|
|
* @return bool
|
|
*/
|
|
protected function isFileReferenced($serial)
|
|
{
|
|
return is_object($this->getReferencedFile($serial));
|
|
}
|
|
|
|
/**
|
|
* Tries to get the referenced file if it exists.
|
|
*
|
|
* @param string $serial
|
|
* @return null|File
|
|
*/
|
|
protected function getReferencedFile($serial)
|
|
{
|
|
try {
|
|
$file = $this->getFileReferenceSerializer()->unserialize($serial);
|
|
if ($file instanceof File && $file->exists()) {
|
|
return $file;
|
|
}
|
|
} catch (\Exception $e) {
|
|
// do nothing
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|