gnu-social/plugins/MentionURL/lib/util.php

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<?php
function mention_url_representative_hcard($url, $fn=null, $mf2=null) {
if(!$mf2) {
$request = HTTPClient::start();
try {
$response = $request->get($url);
} catch(Exception $ex) {
return null;
}
$url = $response->getEffectiveUrl();
$mf2 = new Mf2\Parser($response->getBody(), $url);
$mf2 = $mf2->parse();
}
$hcard = null;
if(!empty($mf2['items'])) {
$hcards = array();
foreach($mf2['items'] as $item) {
if(!in_array('h-card', $item['type'])) {
continue;
}
// We found a match, return it immediately
if(isset($item['properties']['url']) && in_array($url, $item['properties']['url'])) {
$hcard = $item['properties'];
break;
}
// Let's keep all the hcards for later, to return one of them at least
$hcards[] = $item['properties'];
}
// No match immediately for the url we expected, but there were h-cards found
if (count($hcards) > 0) {
$hcard = $hcards[0];
}
}
if(!$hcard && $fn) {
$hcard = array('name' => array($fn));
}
if(!$hcard && $response) {
preg_match('/<title>([^<]+)/', $response->getBody(), $match);
$hcard = array('name' => array($match[1]));
}
if($hcard && !$hcard['url']) {
$hcard['url'] = array($url);
}
return $hcard;
}