ds-site/Classes/Backend/PreviewRenderer/Video.php

<?php

declare(strict_types=1);

/*
 * Copyright (C) 2020 Daniel Siepmann <coding@daniel-siepmann.de>
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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.
 */

namespace DanielSiepmann\DsSite\Backend\PreviewRenderer;

use TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer;
use TYPO3\CMS\Backend\View\BackendLayout\Grid\GridColumnItem;
use TYPO3\CMS\Frontend\ContentObject\ContentDataProcessor;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
use TYPO3\CMS\Frontend\DataProcessing\FilesProcessor;

class Video extends StandardContentPreviewRenderer
{
    public function __construct(
        private ContentDataProcessor $contentDataProcessor
    ) {
    }

    public function renderPageModulePreviewContent(GridColumnItem $item): string
    {
        $record = $item->getRecord();

        $contentObjectRenderer = new ContentObjectRenderer();
        $contentObjectRenderer->start($record, 'tt_content');

        $record = $this->contentDataProcessor->process($contentObjectRenderer, [
            'dataProcessing.' => [
                '10' => FilesProcessor::class,
                '10.' => [
                    'references.' => [
                        'fieldName' => 'media',
                    ],
                    'as' => 'videos',
                ],
            ],
        ], $record);

        $item->setRecord($record);

        return parent::renderPageModulePreviewContent($item);
    }
}