PreviewProcessing.php

Go to the documentation of this file.

<?php
 
/*
 * 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!
 */
 
namespace ‪TYPO3\CMS\Core\Resource\OnlineMedia\Processing;
 
use Psr\EventDispatcher\EventDispatcherInterface;
use ‪TYPO3\CMS\Core\Resource\File;
use ‪TYPO3\CMS\Core\Resource\OnlineMedia\Event\AfterVideoPreviewFetchedEvent;
use ‪TYPO3\CMS\Core\Resource\OnlineMedia\Helpers\OnlineMediaHelperRegistry;
use ‪TYPO3\CMS\Core\Resource\Processing\LocalImageProcessor;
use ‪TYPO3\CMS\Core\Resource\Processing\ProcessorInterface;
use ‪TYPO3\CMS\Core\Resource\Processing\TaskInterface;
 
final class ‪PreviewProcessing implements ‪ProcessorInterface
{
    public function ‪__construct(
        protected readonly ‪OnlineMediaHelperRegistry $onlineMediaHelperRegistry,
        protected readonly EventDispatcherInterface $eventDispatcher,
        protected readonly ‪LocalImageProcessor $localImageProcessor,
    ) {}
 
    public function ‪canProcessTask(‪TaskInterface $task): bool
    {
        if ($task->‪getType() !== 'Image') {
            return false;
        }
        if (!in_array($task->‪getName(), ['Preview', 'CropScaleMask'], true)) {
            return false;
        }
        $sourceFile = $task->‪getSourceFile();
        if (!$this->onlineMediaHelperRegistry->hasOnlineMediaHelper($sourceFile->getExtension())) {
            return false;
        }
        $previewImageFile = $this->‪getPreviewImageFromOnlineMedia($sourceFile);
        return !empty($previewImageFile) && file_exists($previewImageFile);
    }
 
    public function ‪processTask(‪TaskInterface $task): void
    {
        $this->localImageProcessor->processTaskWithLocalFile(
            $task,
            $this->‪getPreviewImageFromOnlineMedia($task->‪getSourceFile())
        );
    }
 
    protected function ‪getPreviewImageFromOnlineMedia(‪File $file): string
    {
        $onlineMediaHelper = $this->onlineMediaHelperRegistry->getOnlineMediaHelper($file);
        $previewImage = $onlineMediaHelper->getPreviewImage($file);
 
        $videoPreviewEvent = new ‪AfterVideoPreviewFetchedEvent($file, $onlineMediaHelper, $previewImage);
        $this->eventDispatcher->dispatch($videoPreviewEvent);
 
        return $videoPreviewEvent->getPreviewImageFilename();
    }
}