AbstractGraphicalTask.php

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<?php
namespace TYPO3\CMS\Core\Resource\Processing;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

abstract class AbstractGraphicalTask extends AbstractTask
{
    protected $targetFileExtension;

    public function getTargetFilename()
    {
        return $this->getSourceFile()->getNameWithoutExtension()
            . '_' . $this->getConfigurationChecksum()
            . '.' . $this->getTargetFileExtension();
    }

    public function getTargetFileExtension()
    {
        if (!isset($this->targetFileExtension)) {
            $this->targetFileExtension = $this->determineTargetFileExtension();
        }

        return $this->targetFileExtension;
    }

    protected function determineTargetFileExtension()
    {
        if (!empty($this->configuration['fileExtension'])) {
            $targetFileExtension = $this->configuration['fileExtension'];
        } elseif (in_array($this->getSourceFile()->getExtension(), ['jpg', 'jpeg', 'png', 'gif'], true)) {
            $targetFileExtension = $this->getSourceFile()->getExtension();
        } elseif ($GLOBALS['TYPO3_CONF_VARS']['GFX']['thumbnails_png']) {
            // If true, thumbnails from non-processable files will be converted to 'png', otherwise 'gif'
            $targetFileExtension = 'png';
        } else {
            $targetFileExtension = 'gif';
        }
        return $targetFileExtension;
    }
}