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<?php
/**
* ownCloud - News
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Alessandro Cosentino <cosenal@gmail.com>
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @copyright Alessandro Cosentino 2012
* @copyright Bernhard Posselt 2012, 2014
*/
namespace OCA\News\ArticleEnhancer;
use \ZendXml\Security;
use \OCA\News\Db\Item;
class GlobalArticleEnhancer implements ArticleEnhancer {
/**
* This method is run after all enhancers and for every item
*/
public function enhance(Item $item) {
$dom = new \DOMDocument();
// wrap it inside a div if there is none to prevent invalid wrapping
// inside <p> tags
$body = '<div>' . $item->getBody() . '</div>';
$isOk = Security::scanHtml(
$body, $dom, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD
);
$xpath = new \DOMXpath($dom);
// remove youtube autoplay
// NOTE: PHP supports only XPath 1.0 so no matches() function :(
$youtubeIframes = "//iframe[contains(@src, 'youtube.com')]";
$elements = $xpath->query($youtubeIframes);
foreach ($elements as $element) {
// src needs to be matched against regex to prevent false positives
// and because theres no XPath matches function available
$src = $element->getAttribute('src');
$regex = '%^(http://|https://|//)(www\.)?youtube.com/' .
'.*\?.*autoplay=1.*%i';
if (preg_match($regex, $src)) {
$replaced = str_replace('autoplay=1', 'autoplay=0', $src);
$element->setAttribute('src', $replaced);
}
}
// save all changes back to the item
$item->setBody(trim($dom->saveHTML()));
return $item;
}
}
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