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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Olivier Paroz <github@oparoz.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Tor Lillqvist <tml@collabora.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Preview;
use OCP\Files\File;
use OCP\Files\FileInfo;
use OCP\IImage;
use Psr\Log\LoggerInterface;
abstract class Office extends ProviderV2 {
/**
* {@inheritDoc}
*/
public function isAvailable(FileInfo $file): bool {
return is_string($this->options['officeBinary']);
}
/**
* {@inheritDoc}
*/
public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
if (!$this->isAvailable($file)) {
return null;
}
$absPath = $this->getLocalFile($file);
$tmpDir = \OC::$server->getTempManager()->getTempBaseDir();
$defaultParameters = ' -env:UserInstallation=file://' . escapeshellarg($tmpDir . '/owncloud-' . \OC_Util::getInstanceId() . '/') . ' --headless --nologo --nofirststartwizard --invisible --norestore --convert-to png --outdir ';
$clParameters = \OC::$server->getConfig()->getSystemValue('preview_office_cl_parameters', $defaultParameters);
$cmd = $this->options['officeBinary'] . $clParameters . escapeshellarg($tmpDir) . ' ' . escapeshellarg($absPath);
exec($cmd, $output, $returnCode);
if ($returnCode !== 0) {
$this->cleanTmpFiles();
return null;
}
//create imagick object from png
$pngPreview = null;
try {
[$dirname, , , $filename] = array_values(pathinfo($absPath));
$pngPreview = $tmpDir . '/' . $filename . '.png';
$png = new \imagick($pngPreview . '[0]');
$png->setImageFormat('jpg');
} catch (\Exception $e) {
$this->cleanTmpFiles();
unlink($pngPreview);
\OC::$server->get(LoggerInterface::class)->error($e->getMessage(), [
'exception' => $e,
'app' => 'core',
]);
return null;
}
$image = new \OC_Image();
$image->loadFromData((string) $png);
$this->cleanTmpFiles();
unlink($pngPreview);
if ($image->valid()) {
$image->scaleDownToFit($maxX, $maxY);
return $image;
}
return null;
}
}
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