69 lines
1.6 KiB
PHP
69 lines
1.6 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* @file src/Util/JsonLD.php
|
||
|
|
*/
|
||
|
|
namespace Friendica\Util;
|
||
|
|
|
||
|
|
use Friendica\Core\Cache;
|
||
|
|
use digitalbazaar\jsonld as DBJsonLD;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief This class contain methods to work with JsonLD data
|
||
|
|
*/
|
||
|
|
class JsonLD
|
||
|
|
{
|
||
|
|
public static function documentLoader($url)
|
||
|
|
{
|
||
|
|
$recursion = 0;
|
||
|
|
|
||
|
|
$x = debug_backtrace();
|
||
|
|
if ($x) {
|
||
|
|
foreach ($x as $n) {
|
||
|
|
if ($n['function'] === __FUNCTION__) {
|
||
|
|
$recursion ++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($recursion > 5) {
|
||
|
|
logger('jsonld bomb detected at: ' . $url);
|
||
|
|
exit();
|
||
|
|
}
|
||
|
|
|
||
|
|
$result = Cache::get('documentLoader:' . $url);
|
||
|
|
if (!is_null($result)) {
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
$data = jsonld_default_document_loader($url);
|
||
|
|
Cache::set('documentLoader:' . $url, $data, CACHE_DAY);
|
||
|
|
return $data;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function normalize($json)
|
||
|
|
{
|
||
|
|
jsonld_set_document_loader('Friendica\Util\JsonLD::documentLoader');
|
||
|
|
|
||
|
|
$jsonobj = json_decode(json_encode($json));
|
||
|
|
|
||
|
|
return jsonld_normalize($jsonobj, array('algorithm' => 'URDNA2015', 'format' => 'application/nquads'));
|
||
|
|
}
|
||
|
|
|
||
|
|
public static function compact($json)
|
||
|
|
{
|
||
|
|
jsonld_set_document_loader('Friendica\Util\JsonLD::documentLoader');
|
||
|
|
|
||
|
|
$context = (object)['as' => 'https://www.w3.org/ns/activitystreams',
|
||
|
|
'w3sec' => 'https://w3id.org/security',
|
||
|
|
'ostatus' => (object)['@id' => 'http://ostatus.org#', '@type' => '@id'],
|
||
|
|
'vcard' => (object)['@id' => 'http://www.w3.org/2006/vcard/ns#', '@type' => '@id'],
|
||
|
|
'uuid' => (object)['@id' => 'http://schema.org/identifier', '@type' => '@id']];
|
||
|
|
|
||
|
|
$jsonobj = json_decode(json_encode($json));
|
||
|
|
|
||
|
|
$compacted = jsonld_compact($jsonobj, $context);
|
||
|
|
|
||
|
|
return json_decode(json_encode($compacted), true);
|
||
|
|
}
|
||
|
|
}
|