/**
* Find feed urls inside a HTML document.
*
* @param string $url Website url
* @param string $html HTML content
*
* @return array List of feed links
*/
public function find($url, $html)
{
Logger::setMessage(get_called_class() . ': Try to discover subscriptions');
$dom = XmlParser::getHtmlDocument($html);
$xpath = new DOMXPath($dom);
$links = array();
$queries = array('//link[@type="application/rss+xml"]', '//link[@type="application/atom+xml"]');
foreach ($queries as $query) {
$nodes = $xpath->query($query);
foreach ($nodes as $node) {
$link = $node->getAttribute('href');
if (!empty($link)) {
$feedUrl = new Url($link);
$siteUrl = new Url($url);
$links[] = $feedUrl->getAbsoluteUrl($feedUrl->isRelativeUrl() ? $siteUrl->getBaseUrl() : '');
}
}
}
Logger::setMessage(get_called_class() . ': ' . implode(', ', $links));
return $links;
}
