YouTubeRenderer.php

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<?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\Rendering;
 
use ‪TYPO3\CMS\Core\Resource\File;
use ‪TYPO3\CMS\Core\Resource\FileInterface;
use ‪TYPO3\CMS\Core\Resource\FileReference;
use ‪TYPO3\CMS\Core\Resource\OnlineMedia\Helpers\OnlineMediaHelperInterface;
use ‪TYPO3\CMS\Core\Resource\OnlineMedia\Helpers\OnlineMediaHelperRegistry;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪YouTubeRenderer implements ‪FileRendererInterface
{
    protected ‪$onlineMediaHelper;
 
    public function ‪getPriority()
    {
        return 1;
    }
 
    public function ‪canRender(‪FileInterface $file)
    {
        return ($file->‪getMimeType() === 'video/youtube' || $file->‪getExtension() === 'youtube') && $this->‪getOnlineMediaHelper($file) !== false;
    }
 
    protected function ‪getOnlineMediaHelper(‪FileInterface $file)
    {
        if ($this->onlineMediaHelper === null) {
            $orgFile = $file;
            if ($orgFile instanceof ‪FileReference) {
                $orgFile = $orgFile->getOriginalFile();
            }
            if ($orgFile instanceof ‪File) {
                $this->onlineMediaHelper = ‪OnlineMediaHelperRegistry::getInstance()->‪getOnlineMediaHelper($orgFile);
            } else {
                $this->onlineMediaHelper = false;
            }
        }
        return ‪$this->onlineMediaHelper;
    }
 
    public function ‪render(‪FileInterface $file, $width, $height, array $options = [], $usedPathsRelativeToCurrentScript = false)
    {
        $options = $this->‪collectOptions($options, $file);
        $src = $this->‪createYouTubeUrl($options, $file);
        $attributes = $this->‪collectIframeAttributes($width, $height, $options);
 
        return sprintf(
            '<iframe src="%s"%s></iframe>',
            htmlspecialchars($src, ENT_QUOTES | ENT_HTML5),
            empty($attributes) ? '' : ' ' . $this->‪implodeAttributes($attributes)
        );
    }
 
    protected function ‪collectOptions(array $options, ‪FileInterface $file)
    {
        // Check for an autoplay option at the file reference itself, if not overridden yet.
        if (!isset($options['autoplay']) && $file instanceof ‪FileReference) {
            $autoplay = $file->‪getProperty('autoplay');
            if ($autoplay !== null) {
                $options['autoplay'] = $autoplay;
            }
        }
 
        $showPlayerControls = 1;
        $options['controls'] = (int)!empty($options['controls'] ?? $showPlayerControls);
 
        if (!isset($options['allow'])) {
            $options['allow'] = 'fullscreen';
            if (!empty($options['autoplay'])) {
                $options['allow'] = 'autoplay; fullscreen';
            }
        }
        return $options;
    }
 
    protected function ‪createYouTubeUrl(array $options, ‪FileInterface $file)
    {
        $videoId = $this->‪getVideoIdFromFile($file);
 
        $urlParams = ['autohide=1'];
        $urlParams[] = 'controls=' . $options['controls'];
        if (!empty($options['autoplay'])) {
            $urlParams[] = 'autoplay=1';
            // If autoplay is enabled, enforce mute=1, see https://developer.chrome.com/blog/autoplay/
            $urlParams[] = 'mute=1';
        }
        if (!empty($options['modestbranding'])) {
            $urlParams[] = 'modestbranding=1';
        }
        if (!empty($options['loop'])) {
            $urlParams[] = 'loop=1&playlist=' . rawurlencode($videoId);
        }
        if (isset($options['relatedVideos'])) {
            $urlParams[] = 'rel=' . (int)(bool)$options['relatedVideos'];
        }
        if (!isset($options['enablejsapi']) || !empty($options['enablejsapi'])) {
            $urlParams[] = 'enablejsapi=1&origin=' . rawurlencode(GeneralUtility::getIndpEnv('TYPO3_REQUEST_HOST'));
        }
 
        $youTubeUrl = sprintf(
            'https://www.youtube%s.com/embed/%s?%s',
            !isset($options['no-cookie']) || !empty($options['no-cookie']) ? '-nocookie' : '',
            rawurlencode($videoId),
            implode('&', $urlParams)
        );
 
        return $youTubeUrl;
    }
 
    protected function ‪getVideoIdFromFile(‪FileInterface $file)
    {
        if ($file instanceof ‪FileReference) {
            $orgFile = $file->getOriginalFile();
        } else {
            $orgFile = $file;
        }
 
        return $this->‪getOnlineMediaHelper($file)->‪getOnlineMediaId($orgFile);
    }
 
    protected function ‪collectIframeAttributes($width, $height, array $options)
    {
        $attributes = [];
        $attributes['allowfullscreen'] = true;
 
        if (isset($options['additionalAttributes']) && is_array($options['additionalAttributes'])) {
            $attributes = array_merge($attributes, $options['additionalAttributes']);
        }
        if (isset($options['data']) && is_array($options['data'])) {
            array_walk($options['data'], function (&$value, $key) use (&$attributes) {
                $attributes['data-' . $key] = $value;
            });
        }
        if ((int)$width > 0) {
            $attributes['width'] = (int)$width;
        }
        if ((int)$height > 0) {
            $attributes['height'] = (int)$height;
        }
        if (isset(‪$GLOBALS['TSFE']) && is_object(‪$GLOBALS['TSFE']) && (isset(‪$GLOBALS['TSFE']->config['config']['doctype']) && ‪$GLOBALS['TSFE']->config['config']['doctype'] !== 'html5')) {
            $attributes['frameborder'] = 0;
        }
        foreach (['class', 'dir', 'id', 'lang', 'style', 'title', 'accesskey', 'tabindex', 'onclick', 'poster', 'preload', 'allow'] as $key) {
            if (!empty($options[$key])) {
                $attributes[$key] = $options[$key];
            }
        }
 
        return $attributes;
    }
 
    protected function ‪implodeAttributes(array $attributes): string
    {
        $attributeList = [];
        foreach ($attributes as $name => $value) {
            $name = preg_replace('/[^\p{L}0-9_.-]/u', '', $name);
            if ($value === true) {
                $attributeList[] = $name;
            } else {
                $attributeList[] = $name . '="' . htmlspecialchars($value, ENT_QUOTES | ENT_HTML5) . '"';
            }
        }
        return implode(' ', $attributeList);
    }
}