src/Util/ParseUrl.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Util;
  23
  24 use DOMDocument;
  25 use DOMXPath;
  26 use Friendica\Content\OEmbed;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Protocol\HTTP\MediaType;
  29 use Friendica\Core\Hook;
  30 use Friendica\Core\Logger;
  31 use Friendica\Database\Database;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
  35 use Friendica\Network\HTTPException;
  36 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
  37
  38 /**
  39  * Get information about a given URL
  40  *
  41  * Class with methods for extracting certain content from an url
  42  */
  43 class ParseUrl
  44 {
  45         const DEFAULT_EXPIRATION_FAILURE = 'now + 1 day';
  46         const DEFAULT_EXPIRATION_SUCCESS = 'now + 3 months';
  47
  48         /**
  49          * Maximum number of characters for the description
  50          */
  51         const MAX_DESC_COUNT = 250;
  52
  53         /**
  54          * Minimum number of characters for the description
  55          */
  56         const MIN_DESC_COUNT = 100;
  57
  58         /**
  59          * Fetch the content type of the given url
  60          * @param string $url    URL of the page
  61          * @param string $accept content-type to accept
  62          * @param int    $timeout
  63          * @return array content type
  64          */
  65         public static function getContentType(string $url, string $accept = HttpClientAccept::DEFAULT, int $timeout = 0): array
  66         {
  67                 if (!empty($timeout)) {
  68                         $options = [HttpClientOptions::TIMEOUT => $timeout];
  69                 } else {
  70                         $options = [];
  71                 }
  72
  73                 try {
  74                         $curlResult = DI::httpClient()->head($url, array_merge([HttpClientOptions::ACCEPT_CONTENT => $accept], $options));
  75                 } catch (\Exception $e) {
  76                         DI::logger()->debug('Got exception', ['url' => $url, 'message' => $e->getMessage()]);
  77                         return [];
  78                 }
  79
  80                 // Workaround for systems that can't handle a HEAD request. Don't retry on timeouts.
  81                 if (!$curlResult->isSuccess() && ($curlResult->getReturnCode() >= 400) && !in_array($curlResult->getReturnCode(), [408, 504])) {
  82                         $curlResult = DI::httpClient()->get($url, $accept, array_merge([HttpClientOptions::CONTENT_LENGTH => 1000000], $options));
  83                 }
  84
  85                 if (!$curlResult->isSuccess()) {
  86                         Logger::debug('Got HTTP Error', ['http error' => $curlResult->getReturnCode(), 'url' => $url]);
  87                         return [];
  88                 }
  89
  90                 $contenttype =  $curlResult->getHeader('Content-Type')[0] ?? '';
  91                 if (empty($contenttype)) {
  92                         return ['application', 'octet-stream'];
  93                 }
  94
  95                 return explode('/', current(explode(';', $contenttype)));
  96         }
  97
  98         /**
  99          * Search for cached embeddable data of an url otherwise fetch it
 100          *
 101          * @param string $url         The url of the page which should be scraped
 102          * @param bool   $do_oembed   The false option is used by the function fetch_oembed()
 103          *                            to avoid endless loops
 104          *
 105          * @return array which contains needed data for embedding
 106          *    string 'url'      => The url of the parsed page
 107          *    string 'type'     => Content type
 108          *    string 'title'    => (optional) The title of the content
 109          *    string 'text'     => (optional) The description for the content
 110          *    string 'image'    => (optional) A preview image of the content
 111          *    array  'images'   => (optional) Array of preview pictures
 112          *    string 'keywords' => (optional) The tags which belong to the content
 113          *
 114          * @throws HTTPException\InternalServerErrorException
 115          * @see   ParseUrl::getSiteinfo() for more information about scraping
 116          * embeddable content
 117          */
 118         public static function getSiteinfoCached(string $url, bool $do_oembed = true): array
 119         {
 120                 if (empty($url)) {
 121                         return [
 122                                 'url' => '',
 123                                 'type' => 'error',
 124                         ];
 125                 }
 126
 127                 $urlHash = hash('sha256', $url);
 128
 129                 $parsed_url = DBA::selectFirst('parsed_url', ['content'],
 130                         ['url_hash' => $urlHash, 'oembed' => $do_oembed]
 131                 );
 132                 if (!empty($parsed_url['content'])) {
 133                         $data = unserialize($parsed_url['content']);
 134                         return $data;
 135                 }
 136
 137                 $data = self::getSiteinfo($url, $do_oembed);
 138
 139                 $expires = $data['expires'];
 140
 141                 unset($data['expires']);
 142
 143                 DI::dba()->insert(
 144                         'parsed_url',
 145                         [
 146                                 'url_hash' => $urlHash,
 147                                 'oembed'   => $do_oembed,
 148                                 'url'      => $url,
 149                                 'content'  => serialize($data),
 150                                 'created'  => DateTimeFormat::utcNow(),
 151                                 'expires'  => $expires,
 152                         ],
 153                         Database::INSERT_UPDATE
 154                 );
 155
 156                 return $data;
 157         }
 158
 159         /**
 160          * Parse a page for embeddable content information
 161          *
 162          * This method parses to url for meta data which can be used to embed
 163          * the content. If available it prioritizes Open Graph meta tags.
 164          * If this is not available it uses the twitter cards meta tags.
 165          * As fallback it uses standard html elements with meta informations
 166          * like \<title\>Awesome Title\</title\> or
 167          * \<meta name="description" content="An awesome description"\>
 168          *
 169          * @param string $url         The url of the page which should be scraped
 170          * @param bool   $do_oembed   The false option is used by the function fetch_oembed()
 171          *                            to avoid endless loops
 172          * @param int    $count       Internal counter to avoid endless loops
 173          *
 174          * @return array which contains needed data for embedding
 175          *    string 'url'      => The url of the parsed page
 176          *    string 'type'     => Content type (error, link, photo, image, audio, video)
 177          *    string 'title'    => (optional) The title of the content
 178          *    string 'text'     => (optional) The description for the content
 179          *    string 'image'    => (optional) A preview image of the content
 180          *    array  'images'   => (optional) Array of preview pictures
 181          *    string 'keywords' => (optional) The tags which belong to the content
 182          *
 183          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 184          * @todo  https://developers.google.com/+/plugins/snippet/
 185          * @verbatim
 186          * <meta itemprop="name" content="Awesome title">
 187          * <meta itemprop="description" content="An awesome description">
 188          * <meta itemprop="image" content="http://maple.libertreeproject.org/images/tree-icon.png">
 189          *
 190          * <body itemscope itemtype="http://schema.org/Product">
 191          *   <h1 itemprop="name">Shiny Trinket</h1>
 192          *   <img itemprop="image" src="{image-url}" />
 193          *   <p itemprop="description">Shiny trinkets are shiny.</p>
 194          * </body>
 195          * @endverbatim
 196          */
 197         public static function getSiteinfo(string $url, bool $do_oembed = true, int $count = 1): array
 198         {
 199                 if (empty($url)) {
 200                         return [
 201                                 'url' => '',
 202                                 'type' => 'error',
 203                         ];
 204                 }
 205
 206                 // Check if the URL does contain a scheme
 207                 $scheme = parse_url($url, PHP_URL_SCHEME);
 208
 209                 if ($scheme == '') {
 210                         $url = 'http://' . ltrim($url, '/');
 211                 }
 212
 213                 $url = trim($url, "'\"");
 214
 215                 $url = Network::stripTrackingQueryParams($url);
 216
 217                 $siteinfo = [
 218                         'url' => $url,
 219                         'type' => 'link',
 220                         'expires' => DateTimeFormat::utc(self::DEFAULT_EXPIRATION_FAILURE),
 221                 ];
 222
 223                 if ($count > 10) {
 224                         Logger::warning('Endless loop detected', ['url' => $url]);
 225                         return $siteinfo;
 226                 }
 227
 228                 $type = self::getContentType($url);
 229                 Logger::info('Got content-type', ['content-type' => $type, 'url' => $url]);
 230                 if (!empty($type) && in_array($type[0], ['image', 'video', 'audio'])) {
 231                         $siteinfo['type'] = $type[0];
 232                         return $siteinfo;
 233                 }
 234
 235                 if ((count($type) >= 2) && (($type[0] != 'text') || ($type[1] != 'html'))) {
 236                         Logger::info('Unparseable content-type, quitting here, ', ['content-type' => $type, 'url' => $url]);
 237                         return $siteinfo;
 238                 }
 239
 240                 $curlResult = DI::httpClient()->get($url, HttpClientAccept::HTML, [HttpClientOptions::CONTENT_LENGTH => 1000000]);
 241                 if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
 242                         Logger::info('Empty body or error when fetching', ['url' => $url, 'success' => $curlResult->isSuccess(), 'code' => $curlResult->getReturnCode()]);
 243                         return $siteinfo;
 244                 }
 245
 246                 $siteinfo['expires'] = DateTimeFormat::utc(self::DEFAULT_EXPIRATION_SUCCESS);
 247
 248                 if ($cacheControlHeader = $curlResult->getHeader('Cache-Control')[0] ?? '') {
 249                         if (preg_match('/max-age=([0-9]+)/i', $cacheControlHeader, $matches)) {
 250                                 $maxAge = max(86400, (int)array_pop($matches));
 251                                 $siteinfo['expires'] = DateTimeFormat::utc("now + $maxAge seconds");
 252                         }
 253                 }
 254
 255                 $body = $curlResult->getBody();
 256
 257                 if ($do_oembed) {
 258                         $oembed_data = OEmbed::fetchURL($url, false, false);
 259
 260                         if (!empty($oembed_data->type)) {
 261                                 if (!in_array($oembed_data->type, ['error', 'rich', 'image', 'video', 'audio', ''])) {
 262                                         $siteinfo['type'] = $oembed_data->type;
 263                                 }
 264
 265                                 // See https://github.com/friendica/friendica/pull/5763#discussion_r217913178
 266                                 if ($siteinfo['type'] != 'photo') {
 267                                         if (!empty($oembed_data->title)) {
 268                                                 $siteinfo['title'] = trim($oembed_data->title);
 269                                         }
 270                                         if (!empty($oembed_data->description)) {
 271                                                 $siteinfo['text'] = trim($oembed_data->description);
 272                                         }
 273                                         if (!empty($oembed_data->author_name)) {
 274                                                 $siteinfo['author_name'] = trim($oembed_data->author_name);
 275                                         }
 276                                         if (!empty($oembed_data->author_url)) {
 277                                                 $siteinfo['author_url'] = trim($oembed_data->author_url);
 278                                         }
 279                                         if (!empty($oembed_data->provider_name)) {
 280                                                 $siteinfo['publisher_name'] = trim($oembed_data->provider_name);
 281                                         }
 282                                         if (!empty($oembed_data->provider_url)) {
 283                                                 $siteinfo['publisher_url'] = trim($oembed_data->provider_url);
 284                                         }
 285                                         if (!empty($oembed_data->thumbnail_url)) {
 286                                                 $siteinfo['image'] = $oembed_data->thumbnail_url;
 287                                         }
 288                                 }
 289                         }
 290                 }
 291
 292                 $charset = '';
 293                 try {
 294                         // Look for a charset, first in headers
 295                         $mediaType = MediaType::fromContentType($curlResult->getContentType());
 296                         if (isset($mediaType->parameters['charset'])) {
 297                                 $charset = $mediaType->parameters['charset'];
 298                         }
 299                 } catch(\InvalidArgumentException $e) {}
 300
 301                 $siteinfo['charset'] = $charset;
 302
 303                 if ($charset && strtoupper($charset) != 'UTF-8') {
 304                         // See https://github.com/friendica/friendica/issues/5470#issuecomment-418351211
 305                         $charset = str_ireplace('latin-1', 'latin1', $charset);
 306
 307                         Logger::info('detected charset', ['charset' => $charset]);
 308                         $body = iconv($charset, 'UTF-8//TRANSLIT', $body);
 309                 }
 310
 311                 $body = mb_convert_encoding($body, 'HTML-ENTITIES', 'UTF-8');
 312
 313                 if (empty($body)) {
 314                         return $siteinfo;
 315                 }
 316
 317                 $doc = new DOMDocument();
 318                 @$doc->loadHTML($body);
 319
 320                 $siteinfo['charset'] = HTML::extractCharset($doc) ?? $siteinfo['charset'];
 321
 322                 XML::deleteNode($doc, 'style');
 323                 XML::deleteNode($doc, 'option');
 324                 XML::deleteNode($doc, 'h1');
 325                 XML::deleteNode($doc, 'h2');
 326                 XML::deleteNode($doc, 'h3');
 327                 XML::deleteNode($doc, 'h4');
 328                 XML::deleteNode($doc, 'h5');
 329                 XML::deleteNode($doc, 'h6');
 330                 XML::deleteNode($doc, 'ol');
 331                 XML::deleteNode($doc, 'ul');
 332
 333                 $xpath = new DOMXPath($doc);
 334
 335                 $list = $xpath->query('//meta[@content]');
 336                 foreach ($list as $node) {
 337                         $meta_tag = [];
 338                         if ($node->attributes->length) {
 339                                 foreach ($node->attributes as $attribute) {
 340                                         $meta_tag[$attribute->name] = $attribute->value;
 341                                 }
 342                         }
 343
 344                         if (@$meta_tag['http-equiv'] == 'refresh') {
 345                                 $path = $meta_tag['content'];
 346                                 $pathinfo = explode(';', $path);
 347                                 $content = '';
 348                                 foreach ($pathinfo as $value) {
 349                                         if (substr(strtolower($value), 0, 4) == 'url=') {
 350                                                 $content = substr($value, 4);
 351                                         }
 352                                 }
 353                                 if ($content != '') {
 354                                         $siteinfo = self::getSiteinfo($content, $do_oembed, ++$count);
 355                                         return $siteinfo;
 356                                 }
 357                         }
 358                 }
 359
 360                 $list = $xpath->query('//title');
 361                 if ($list->length > 0) {
 362                         $siteinfo['title'] = trim($list->item(0)->nodeValue);
 363                 }
 364
 365                 $list = $xpath->query('//meta[@name]');
 366                 foreach ($list as $node) {
 367                         $meta_tag = [];
 368                         if ($node->attributes->length) {
 369                                 foreach ($node->attributes as $attribute) {
 370                                         $meta_tag[$attribute->name] = $attribute->value;
 371                                 }
 372                         }
 373
 374                         if (empty($meta_tag['content'])) {
 375                                 continue;
 376                         }
 377
 378                         $meta_tag['content'] = trim(html_entity_decode($meta_tag['content'], ENT_QUOTES, 'UTF-8'));
 379
 380                         switch (strtolower($meta_tag['name'])) {
 381                                 case 'fulltitle':
 382                                         $siteinfo['title'] = trim($meta_tag['content']);
 383                                         break;
 384                                 case 'description':
 385                                         $siteinfo['text'] = trim($meta_tag['content']);
 386                                         break;
 387                                 case 'thumbnail':
 388                                         $siteinfo['image'] = $meta_tag['content'];
 389                                         break;
 390                                 case 'twitter:image':
 391                                         $siteinfo['image'] = $meta_tag['content'];
 392                                         break;
 393                                 case 'twitter:image:src':
 394                                         $siteinfo['image'] = $meta_tag['content'];
 395                                         break;
 396                                 case 'twitter:description':
 397                                         $siteinfo['text'] = trim($meta_tag['content']);
 398                                         break;
 399                                 case 'twitter:title':
 400                                         $siteinfo['title'] = trim($meta_tag['content']);
 401                                         break;
 402                                 case 'twitter:player':
 403                                         $siteinfo['player']['embed'] = trim($meta_tag['content']);
 404                                         break;
 405                                 case 'twitter:player:stream':
 406                                         $siteinfo['player']['stream'] = trim($meta_tag['content']);
 407                                         break;
 408                                 case 'twitter:player:width':
 409                                         $siteinfo['player']['width'] = intval($meta_tag['content']);
 410                                         break;
 411                                 case 'twitter:player:height':
 412                                         $siteinfo['player']['height'] = intval($meta_tag['content']);
 413                                         break;
 414                                 case 'dc.title':
 415                                         $siteinfo['title'] = trim($meta_tag['content']);
 416                                         break;
 417                                 case 'dc.description':
 418                                         $siteinfo['text'] = trim($meta_tag['content']);
 419                                         break;
 420                                 case 'dc.creator':
 421                                         $siteinfo['publisher_name'] = trim($meta_tag['content']);
 422                                         break;
 423                                 case 'keywords':
 424                                         $keywords = explode(',', $meta_tag['content']);
 425                                         break;
 426                                 case 'news_keywords':
 427                                         $keywords = explode(',', $meta_tag['content']);
 428                                         break;
 429                         }
 430                 }
 431
 432                 if (isset($keywords)) {
 433                         $siteinfo['keywords'] = [];
 434                         foreach ($keywords as $keyword) {
 435                                 if (!in_array(trim($keyword), $siteinfo['keywords'])) {
 436                                         $siteinfo['keywords'][] = trim($keyword);
 437                                 }
 438                         }
 439                 }
 440
 441                 $list = $xpath->query('//meta[@property]');
 442                 foreach ($list as $node) {
 443                         $meta_tag = [];
 444                         if ($node->attributes->length) {
 445                                 foreach ($node->attributes as $attribute) {
 446                                         $meta_tag[$attribute->name] = $attribute->value;
 447                                 }
 448                         }
 449
 450                         if (!empty($meta_tag['content'])) {
 451                                 $meta_tag['content'] = trim(html_entity_decode($meta_tag['content'], ENT_QUOTES, 'UTF-8'));
 452
 453                                 switch (strtolower($meta_tag['property'])) {
 454                                         case 'og:image':
 455                                                 $siteinfo['image'] = $meta_tag['content'];
 456                                                 break;
 457                                         case 'og:image:url':
 458                                                 $siteinfo['image'] = $meta_tag['content'];
 459                                                 break;
 460                                         case 'og:image:secure_url':
 461                                                 $siteinfo['image'] = $meta_tag['content'];
 462                                                 break;
 463                                         case 'og:title':
 464                                                 $siteinfo['title'] = trim($meta_tag['content']);
 465                                                 break;
 466                                         case 'og:description':
 467                                                 $siteinfo['text'] = trim($meta_tag['content']);
 468                                                 break;
 469                                         case 'og:site_name':
 470                                                 $siteinfo['publisher_name'] = trim($meta_tag['content']);
 471                                                 break;
 472                                         case 'og:locale':
 473                                                 $siteinfo['language'] = trim($meta_tag['content']);
 474                                                 break;
 475                                         case 'og:type':
 476                                                 $siteinfo['pagetype'] = trim($meta_tag['content']);
 477                                                 break;
 478                                         case 'twitter:description':
 479                                                 $siteinfo['text'] = trim($meta_tag['content']);
 480                                                 break;
 481                                         case 'twitter:title':
 482                                                 $siteinfo['title'] = trim($meta_tag['content']);
 483                                                 break;
 484                                         case 'twitter:image':
 485                                                 $siteinfo['image'] = $meta_tag['content'];
 486                                                 break;
 487                                 }
 488                         }
 489                 }
 490
 491                 $list = $xpath->query("//script[@type='application/ld+json']");
 492                 foreach ($list as $node) {
 493                         if (!empty($node->nodeValue)) {
 494                                 if ($jsonld = json_decode($node->nodeValue, true)) {
 495                                         $siteinfo = self::parseParts($siteinfo, $jsonld);
 496                                 }
 497                         }
 498                 }
 499
 500                 if (!empty($siteinfo['player']['stream'])) {
 501                         // Only add player data to media arrays if there is no duplicate
 502                         $content_urls = array_merge(array_column($siteinfo['audio'] ?? [], 'content'), array_column($siteinfo['video'] ?? [], 'content'));
 503                         if (!in_array($siteinfo['player']['stream'], $content_urls)) {
 504                                 $contenttype = self::getContentType($siteinfo['player']['stream']);
 505                                 if (!empty($contenttype[0]) && in_array($contenttype[0], ['audio', 'video'])) {
 506                                         $media = ['content' => $siteinfo['player']['stream']];
 507
 508                                         if (!empty($siteinfo['player']['embed'])) {
 509                                                 $media['embed'] = $siteinfo['player']['embed'];
 510                                         }
 511
 512                                         $siteinfo[$contenttype[0]][] = $media;
 513                                 }
 514                         }
 515                 }
 516
 517                 if (!empty($siteinfo['image'])) {
 518                         $siteinfo['images'] = $siteinfo['images'] ?? [];
 519                         array_unshift($siteinfo['images'], ['url' => $siteinfo['image']]);
 520                         unset($siteinfo['image']);
 521                 }
 522
 523                 $siteinfo = self::checkMedia($url, $siteinfo);
 524
 525                 if (!empty($siteinfo['text']) && mb_strlen($siteinfo['text']) > self::MAX_DESC_COUNT) {
 526                         $siteinfo['text'] = mb_substr($siteinfo['text'], 0, self::MAX_DESC_COUNT) . '…';
 527                         $pos = mb_strrpos($siteinfo['text'], '.');
 528                         if ($pos > self::MIN_DESC_COUNT) {
 529                                 $siteinfo['text'] = mb_substr($siteinfo['text'], 0, $pos + 1);
 530                         }
 531                 }
 532
 533                 Logger::info('Siteinfo fetched', ['url' => $url, 'siteinfo' => $siteinfo]);
 534
 535                 Hook::callAll('getsiteinfo', $siteinfo);
 536
 537                 ksort($siteinfo);
 538
 539                 return $siteinfo;
 540         }
 541
 542         /**
 543          * Check the attached media elements.
 544          * Fix existing data and add missing data.
 545          *
 546          * @param string $page_url
 547          * @param array $siteinfo
 548          * @return array
 549          */
 550         private static function checkMedia(string $page_url, array $siteinfo) : array
 551         {
 552                 if (!empty($siteinfo['images'])) {
 553                         array_walk($siteinfo['images'], function (&$image) use ($page_url) {
 554                                 /*
 555                                  * According to the specifications someone could place a picture
 556                                  * URL into the content field as well. But this doesn't seem to
 557                                  * happen in the wild, so we don't cover it here.
 558                                  */
 559                                 if (!empty($image['url'])) {
 560                                         $image['url'] = self::completeUrl($image['url'], $page_url);
 561                                         $photodata = Images::getInfoFromURLCached($image['url']);
 562                                         if (($photodata) && ($photodata[0] > 50) && ($photodata[1] > 50)) {
 563                                                 $image['src'] = $image['url'];
 564                                                 $image['width'] = $photodata[0];
 565                                                 $image['height'] = $photodata[1];
 566                                                 $image['contenttype'] = $photodata['mime'];
 567                                                 $image['blurhash'] = $photodata['blurhash'] ?? null;
 568                                                 unset($image['url']);
 569                                                 ksort($image);
 570                                         } else {
 571                                                 $image = [];
 572                                         }
 573                                 } else {
 574                                         $image = [];
 575                                 }
 576                         });
 577
 578                         $siteinfo['images'] = array_values(array_filter($siteinfo['images']));
 579                 }
 580
 581                 foreach (['audio', 'video'] as $element) {
 582                         if (!empty($siteinfo[$element])) {
 583                                 array_walk($siteinfo[$element], function (&$media) use ($page_url, &$siteinfo) {
 584                                         $url = '';
 585                                         $embed = '';
 586                                         $content = '';
 587                                         $contenttype = '';
 588                                         foreach (['embed', 'content', 'url'] as $field) {
 589                                                 if (!empty($media[$field])) {
 590                                                         $media[$field] = self::completeUrl($media[$field], $page_url);
 591                                                         $type = self::getContentType($media[$field]);
 592                                                         if (($type[0] ?? '') == 'text') {
 593                                                                 if ($field == 'embed') {
 594                                                                         $embed = $media[$field];
 595                                                                 } else {
 596                                                                         $url = $media[$field];
 597                                                                 }
 598                                                         } elseif (!empty($type[0])) {
 599                                                                 $content = $media[$field];
 600                                                                 $contenttype = implode('/', $type);
 601                                                         }
 602                                                 }
 603                                                 unset($media[$field]);
 604                                         }
 605
 606                                         foreach (['image', 'preview'] as $field) {
 607                                                 if (!empty($media[$field])) {
 608                                                         $media[$field] = self::completeUrl($media[$field], $page_url);
 609                                                 }
 610                                         }
 611
 612                                         if (!empty($url)) {
 613                                                 $media['url'] = $url;
 614                                         }
 615                                         if (!empty($embed)) {
 616                                                 $media['embed'] = $embed;
 617                                                 if (empty($siteinfo['player']['embed'])) {
 618                                                         $siteinfo['player']['embed'] = $embed;
 619                                                 }
 620                                         }
 621                                         if (!empty($content)) {
 622                                                 $media['src'] = $content;
 623                                         }
 624                                         if (!empty($contenttype)) {
 625                                                 $media['contenttype'] = $contenttype;
 626                                         }
 627                                         if (empty($url) && empty($content) && empty($embed)) {
 628                                                 $media = [];
 629                                         }
 630                                         ksort($media);
 631                                 });
 632
 633                                 $siteinfo[$element] = array_values(array_filter($siteinfo[$element]));
 634                         }
 635                         if (empty($siteinfo[$element])) {
 636                                 unset($siteinfo[$element]);
 637                         }
 638                 }
 639                 return $siteinfo;
 640         }
 641
 642         /**
 643          * Convert tags from CSV to an array
 644          *
 645          * @param string $string Tags
 646          *
 647          * @return array with formatted Hashtags
 648          */
 649         public static function convertTagsToArray(string $string): array
 650         {
 651                 $arr_tags = str_getcsv($string);
 652                 if (count($arr_tags)) {
 653                         // add the # sign to every tag
 654                         array_walk($arr_tags, [self::class, 'arrAddHashes']);
 655
 656                         return $arr_tags;
 657                 }
 658                 return [];
 659         }
 660
 661         /**
 662          * Add a hasht sign to a string
 663          *
 664          * This method is used as callback function
 665          *
 666          * @param string $tag The pure tag name
 667          * @param int    $k   Counter for internal use
 668          *
 669          * @return void
 670          */
 671         private static function arrAddHashes(string &$tag, int $k)
 672         {
 673                 $tag = '#' . $tag;
 674         }
 675
 676         /**
 677          * Add a scheme to an url
 678          *
 679          * The src attribute of some html elements (e.g. images)
 680          * can miss the scheme so we need to add the correct
 681          * scheme
 682          *
 683          * @param string $url    The url which possibly does have
 684          *                       a missing scheme (a link to an image)
 685          * @param string $scheme The url with a correct scheme
 686          *                       (e.g. the url from the webpage which does contain the image)
 687          *
 688          * @return string The url with a scheme
 689          */
 690         private static function completeUrl(string $url, string $scheme): string
 691         {
 692                 $urlarr = parse_url($url);
 693
 694                 // If the url does already have an scheme
 695                 // we can stop the process here
 696                 if (isset($urlarr['scheme'])) {
 697                         return $url;
 698                 }
 699
 700                 $schemearr = parse_url($scheme);
 701
 702                 $complete = $schemearr['scheme'] . '://' . $schemearr['host'];
 703
 704                 if (!empty($schemearr['port'])) {
 705                         $complete .= ':' . $schemearr['port'];
 706                 }
 707
 708                 if (!empty($urlarr['path'])) {
 709                         if (strpos($urlarr['path'], '/') !== 0) {
 710                                 $complete .= '/';
 711                         }
 712
 713                         $complete .= $urlarr['path'];
 714                 }
 715
 716                 if (!empty($urlarr['query'])) {
 717                         $complete .= '?' . $urlarr['query'];
 718                 }
 719
 720                 if (!empty($urlarr['fragment'])) {
 721                         $complete .= '#' . $urlarr['fragment'];
 722                 }
 723
 724                 return $complete;
 725         }
 726
 727         /**
 728          * Parse the Json-Ld parts of a web page
 729          *
 730          * @param array $siteinfo
 731          * @param array $jsonld
 732          *
 733          * @return array siteinfo
 734          */
 735         private static function parseParts(array $siteinfo, array $jsonld): array
 736         {
 737                 if (!empty($jsonld['@graph']) && is_array($jsonld['@graph'])) {
 738                         foreach ($jsonld['@graph'] as $part) {
 739                                 if (!empty($part) && is_array($part)) {
 740                                         $siteinfo = self::parseParts($siteinfo, $part);
 741                                 }
 742                         }
 743                 } elseif (!empty($jsonld['@type'])) {
 744                         $siteinfo = self::parseJsonLd($siteinfo, $jsonld);
 745                 } elseif (!empty($jsonld)) {
 746                         $keys = array_keys($jsonld);
 747                         $numeric_keys = true;
 748                         foreach ($keys as $key) {
 749                                 if (!is_int($key)) {
 750                                         $numeric_keys = false;
 751                                 }
 752                         }
 753                         if ($numeric_keys) {
 754                                 foreach ($jsonld as $part) {
 755                                         if (!empty($part) && is_array($part)) {
 756                                                 $siteinfo = self::parseParts($siteinfo, $part);
 757                                         }
 758                                 }
 759                         }
 760                 }
 761
 762                 array_walk_recursive($siteinfo, function (&$element) {
 763                         if (is_string($element)) {
 764                                 $element = trim(strip_tags(html_entity_decode($element, ENT_COMPAT, 'UTF-8')));
 765                         }
 766                 });
 767
 768                 return $siteinfo;
 769         }
 770
 771         /**
 772          * Improve the siteinfo with information from the provided JSON-LD information
 773          * @see https://jsonld.com/
 774          * @see https://schema.org/
 775          *
 776          * @param array $siteinfo
 777          * @param array $jsonld
 778          *
 779          * @return array siteinfo
 780          */
 781         private static function parseJsonLd(array $siteinfo, array $jsonld): array
 782         {
 783                 $type = JsonLD::fetchElement($jsonld, '@type');
 784                 if (empty($type)) {
 785                         Logger::info('Empty type', ['url' => $siteinfo['url']]);
 786                         return $siteinfo;
 787                 }
 788
 789                 // Silently ignore some types that aren't processed
 790                 if (in_array($type, ['SiteNavigationElement', 'JobPosting', 'CreativeWork', 'MusicAlbum',
 791                         'WPHeader', 'WPSideBar', 'WPFooter', 'LegalService', 'MusicRecording',
 792                         'ItemList', 'BreadcrumbList', 'Blog', 'Dataset', 'Product'])) {
 793                         return $siteinfo;
 794                 }
 795
 796                 switch ($type) {
 797                         case 'Article':
 798                         case 'AdvertiserContentArticle':
 799                         case 'NewsArticle':
 800                         case 'Report':
 801                         case 'SatiricalArticle':
 802                         case 'ScholarlyArticle':
 803                         case 'SocialMediaPosting':
 804                         case 'TechArticle':
 805                         case 'ReportageNewsArticle':
 806                         case 'SocialMediaPosting':
 807                         case 'BlogPosting':
 808                         case 'LiveBlogPosting':
 809                         case 'DiscussionForumPosting':
 810                                 return self::parseJsonLdArticle($siteinfo, $jsonld);
 811                         case 'WebPage':
 812                         case 'AboutPage':
 813                         case 'CheckoutPage':
 814                         case 'CollectionPage':
 815                         case 'ContactPage':
 816                         case 'FAQPage':
 817                         case 'ItemPage':
 818                         case 'MedicalWebPage':
 819                         case 'ProfilePage':
 820                         case 'QAPage':
 821                         case 'RealEstateListing':
 822                         case 'SearchResultsPage':
 823                         case 'MediaGallery':
 824                         case 'ImageGallery':
 825                         case 'VideoGallery':
 826                         case 'RadioEpisode':
 827                         case 'Event':
 828                                 return self::parseJsonLdWebPage($siteinfo, $jsonld);
 829                         case 'WebSite':
 830                                 return self::parseJsonLdWebSite($siteinfo, $jsonld);
 831                         case 'Organization':
 832                         case 'Airline':
 833                         case 'Consortium':
 834                         case 'Corporation':
 835                         case 'EducationalOrganization':
 836                         case 'FundingScheme':
 837                         case 'GovernmentOrganization':
 838                         case 'LibrarySystem':
 839                         case 'LocalBusiness':
 840                         case 'MedicalOrganization':
 841                         case 'NGO':
 842                         case 'NewsMediaOrganization':
 843                         case 'Project':
 844                         case 'SportsOrganization':
 845                         case 'WorkersUnion':
 846                                 return self::parseJsonLdWebOrganization($siteinfo, $jsonld);
 847                         case 'Person':
 848                         case 'Patient':
 849                         case 'PerformingGroup':
 850                         case 'DanceGroup';
 851                         case 'MusicGroup':
 852                         case 'TheaterGroup':
 853                                 return self::parseJsonLdWebPerson($siteinfo, $jsonld);
 854                         case 'AudioObject':
 855                         case 'Audio':
 856                                 return self::parseJsonLdMediaObject($siteinfo, $jsonld, 'audio');
 857                         case 'VideoObject':
 858                                 return self::parseJsonLdMediaObject($siteinfo, $jsonld, 'video');
 859                         case 'ImageObject':
 860                                 return self::parseJsonLdMediaObject($siteinfo, $jsonld, 'images');
 861                         default:
 862                                 Logger::info('Unknown type', ['type' => $type, 'url' => $siteinfo['url']]);
 863                                 return $siteinfo;
 864                 }
 865         }
 866
 867         /**
 868          * Fetch author and publisher data
 869          *
 870          * @param array $siteinfo
 871          * @param array $jsonld
 872          *
 873          * @return array siteinfo
 874          */
 875         private static function parseJsonLdAuthor(array $siteinfo, array $jsonld): array
 876         {
 877                 $jsonldinfo = [];
 878
 879                 if (!empty($jsonld['publisher']) && is_array($jsonld['publisher'])) {
 880                         $content = JsonLD::fetchElement($jsonld, 'publisher', 'name');
 881                         if (!empty($content) && is_string($content)) {
 882                                 $jsonldinfo['publisher_name'] = trim($content);
 883                         }
 884
 885                         $content = JsonLD::fetchElement($jsonld, 'publisher', 'url');
 886                         if (!empty($content) && is_string($content)) {
 887                                 $jsonldinfo['publisher_url'] = trim($content);
 888                         }
 889
 890                         $brand = JsonLD::fetchElement($jsonld, 'publisher', 'brand', '@type', 'Organization');
 891                         if (!empty($brand) && is_array($brand)) {
 892                                 $content = JsonLD::fetchElement($brand, 'name');
 893                                 if (!empty($content) && is_string($content)) {
 894                                         $jsonldinfo['publisher_name'] = trim($content);
 895                                 }
 896
 897                                 $content = JsonLD::fetchElement($brand, 'url');
 898                                 if (!empty($content) && is_string($content)) {
 899                                         $jsonldinfo['publisher_url'] = trim($content);
 900                                 }
 901
 902                                 $content = JsonLD::fetchElement($brand, 'logo', 'url');
 903                                 if (!empty($content) && is_string($content)) {
 904                                         $jsonldinfo['publisher_img'] = trim($content);
 905                                 }
 906                         }
 907
 908                         $logo = JsonLD::fetchElement($jsonld, 'publisher', 'logo');
 909                         if (!empty($logo) && is_array($logo)) {
 910                                 $content = JsonLD::fetchElement($logo, 'url');
 911                                 if (!empty($content) && is_string($content)) {
 912                                         $jsonldinfo['publisher_img'] = trim($content);
 913                                 }
 914                         }
 915                 } elseif (!empty($jsonld['publisher']) && is_string($jsonld['publisher'])) {
 916                         $jsonldinfo['publisher_name'] = trim($jsonld['publisher']);
 917                 }
 918
 919                 if (!empty($jsonld['author']) && is_array($jsonld['author'])) {
 920                         $content = JsonLD::fetchElement($jsonld, 'author', 'name');
 921                         if (!empty($content) && is_string($content)) {
 922                                 $jsonldinfo['author_name'] = trim($content);
 923                         }
 924
 925                         $content = JsonLD::fetchElement($jsonld, 'author', 'sameAs');
 926                         if (!empty($content) && is_string($content)) {
 927                                 $jsonldinfo['author_url'] = trim($content);
 928                         }
 929
 930                         $content = JsonLD::fetchElement($jsonld, 'author', 'url');
 931                         if (!empty($content) && is_string($content)) {
 932                                 $jsonldinfo['author_url'] = trim($content);
 933                         }
 934
 935                         $logo = JsonLD::fetchElement($jsonld, 'author', 'logo');
 936                         if (!empty($logo) && is_array($logo)) {
 937                                 $content = JsonLD::fetchElement($logo, 'url');
 938                                 if (!empty($content) && is_string($content)) {
 939                                         $jsonldinfo['author_img'] = trim($content);
 940                                 }
 941                         }
 942                 } elseif (!empty($jsonld['author']) && is_string($jsonld['author'])) {
 943                         $jsonldinfo['author_name'] = trim($jsonld['author']);
 944                 }
 945
 946                 Logger::info('Fetched Author information', ['fetched' => $jsonldinfo]);
 947
 948                 return array_merge($siteinfo, $jsonldinfo);
 949         }
 950
 951         /**
 952          * Fetch data from the provided JSON-LD Article type
 953          * @see https://schema.org/Article
 954          *
 955          * @param array $siteinfo
 956          * @param array $jsonld
 957          *
 958          * @return array siteinfo
 959          */
 960         private static function parseJsonLdArticle(array $siteinfo, array $jsonld): array
 961         {
 962                 $jsonldinfo = [];
 963
 964                 $content = JsonLD::fetchElement($jsonld, 'headline');
 965                 if (!empty($content) && is_string($content)) {
 966                         $jsonldinfo['title'] = trim($content);
 967                 }
 968
 969                 $content = JsonLD::fetchElement($jsonld, 'alternativeHeadline');
 970                 if (!empty($content) && is_string($content) && (($jsonldinfo['title'] ?? '') != trim($content))) {
 971                         $jsonldinfo['alternative_title'] = trim($content);
 972                 }
 973
 974                 $content = JsonLD::fetchElement($jsonld, 'description');
 975                 if (!empty($content) && is_string($content)) {
 976                         $jsonldinfo['text'] = trim($content);
 977                 }
 978
 979                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
 980                 if (!empty($content)) {
 981                         $jsonldinfo['image'] = trim($content);
 982                 }
 983
 984                 $content = JsonLD::fetchElement($jsonld, 'image', 'url', '@type', 'ImageObject');
 985                 if (!empty($content) && is_string($content)) {
 986                         $jsonldinfo['image'] = trim($content);
 987                 }
 988
 989                 if (!empty($jsonld['keywords']) && !is_array($jsonld['keywords'])) {
 990                         $content = JsonLD::fetchElement($jsonld, 'keywords');
 991                         if (!empty($content)) {
 992                                 $siteinfo['keywords'] = [];
 993                                 $keywords = explode(',', $content);
 994                                 foreach ($keywords as $keyword) {
 995                                         $siteinfo['keywords'][] = trim($keyword);
 996                                 }
 997                         }
 998                 } elseif (!empty($jsonld['keywords'])) {
 999                         $content = JsonLD::fetchElementArray($jsonld, 'keywords');
1000                         if (!empty($content) && is_array($content)) {
1001                                 $jsonldinfo['keywords'] = $content;
1002                         }
1003                 }
1004
1005                 $content = JsonLD::fetchElement($jsonld, 'datePublished');
1006                 if (!empty($content) && is_string($content)) {
1007                         $jsonldinfo['published'] = DateTimeFormat::utc($content);
1008                 }
1009
1010                 $content = JsonLD::fetchElement($jsonld, 'dateModified');
1011                 if (!empty($content) && is_string($content)) {
1012                         $jsonldinfo['modified'] = DateTimeFormat::utc($content);
1013                 }
1014
1015                 $jsonldinfo = self::parseJsonLdAuthor($jsonldinfo, $jsonld);
1016
1017                 Logger::info('Fetched article information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1018
1019                 return array_merge($siteinfo, $jsonldinfo);
1020         }
1021
1022         /**
1023          * Fetch data from the provided JSON-LD WebPage type
1024          * @see https://schema.org/WebPage
1025          *
1026          * @param array $siteinfo
1027          * @param array $jsonld
1028          *
1029          * @return array siteinfo
1030          */
1031         private static function parseJsonLdWebPage(array $siteinfo, array $jsonld): array
1032         {
1033                 $jsonldinfo = [];
1034
1035                 $content = JsonLD::fetchElement($jsonld, 'name');
1036                 if (!empty($content)) {
1037                         $jsonldinfo['title'] = trim($content);
1038                 }
1039
1040                 $content = JsonLD::fetchElement($jsonld, 'description');
1041                 if (!empty($content) && is_string($content)) {
1042                         $jsonldinfo['text'] = trim($content);
1043                 }
1044
1045                 $content = JsonLD::fetchElement($jsonld, 'image');
1046                 if (!empty($content) && is_string($content)) {
1047                         $jsonldinfo['image'] = trim($content);
1048                 }
1049
1050                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
1051                 if (!empty($content) && is_string($content)) {
1052                         $jsonldinfo['image'] = trim($content);
1053                 }
1054
1055                 $jsonldinfo = self::parseJsonLdAuthor($jsonldinfo, $jsonld);
1056
1057                 Logger::info('Fetched WebPage information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1058
1059                 return array_merge($siteinfo, $jsonldinfo);
1060         }
1061
1062         /**
1063          * Fetch data from the provided JSON-LD WebSite type
1064          * @see https://schema.org/WebSite
1065          *
1066          * @param array $siteinfo
1067          * @param array $jsonld
1068          *
1069          * @return array siteinfo
1070          */
1071         private static function parseJsonLdWebSite(array $siteinfo, array $jsonld): array
1072         {
1073                 $jsonldinfo = [];
1074
1075                 $content = JsonLD::fetchElement($jsonld, 'name');
1076                 if (!empty($content) && is_string($content)) {
1077                         $jsonldinfo['publisher_name'] = trim($content);
1078                 }
1079
1080                 $content = JsonLD::fetchElement($jsonld, 'description');
1081                 if (!empty($content) && is_string($content)) {
1082                         $jsonldinfo['publisher_description'] = trim($content);
1083                 }
1084
1085                 $content = JsonLD::fetchElement($jsonld, 'url');
1086                 if (!empty($content) && is_string($content)) {
1087                         $jsonldinfo['publisher_url'] = trim($content);
1088                 }
1089
1090                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
1091                 if (!empty($content) && is_string($content)) {
1092                         $jsonldinfo['image'] = trim($content);
1093                 }
1094
1095                 $jsonldinfo = self::parseJsonLdAuthor($jsonldinfo, $jsonld);
1096
1097                 Logger::info('Fetched WebSite information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1098                 return array_merge($siteinfo, $jsonldinfo);
1099         }
1100
1101         /**
1102          * Fetch data from the provided JSON-LD Organization type
1103          * @see https://schema.org/Organization
1104          *
1105          * @param array $siteinfo
1106          * @param array $jsonld
1107          *
1108          * @return array siteinfo
1109          */
1110         private static function parseJsonLdWebOrganization(array $siteinfo, array $jsonld): array
1111         {
1112                 $jsonldinfo = [];
1113
1114                 $content = JsonLD::fetchElement($jsonld, 'name');
1115                 if (!empty($content) && is_string($content)) {
1116                         $jsonldinfo['publisher_name'] = trim($content);
1117                 }
1118
1119                 $content = JsonLD::fetchElement($jsonld, 'description');
1120                 if (!empty($content) && is_string($content)) {
1121                         $jsonldinfo['publisher_description'] = trim($content);
1122                 }
1123
1124                 $content = JsonLD::fetchElement($jsonld, 'url');
1125                 if (!empty($content) && is_string($content)) {
1126                         $jsonldinfo['publisher_url'] = trim($content);
1127                 }
1128
1129                 $content = JsonLD::fetchElement($jsonld, 'logo', 'url', '@type', 'ImageObject');
1130                 if (!empty($content) && is_string($content)) {
1131                         $jsonldinfo['publisher_img'] = trim($content);
1132                 } elseif (!empty($content) && is_array($content)) {
1133                         $jsonldinfo['publisher_img'] = trim($content[0]);
1134                 }
1135
1136                 $content = JsonLD::fetchElement($jsonld, 'brand', 'name', '@type', 'Organization');
1137                 if (!empty($content) && is_string($content)) {
1138                         $jsonldinfo['publisher_name'] = trim($content);
1139                 }
1140
1141                 $content = JsonLD::fetchElement($jsonld, 'brand', 'url', '@type', 'Organization');
1142                 if (!empty($content) && is_string($content)) {
1143                         $jsonldinfo['publisher_url'] = trim($content);
1144                 }
1145
1146                 Logger::info('Fetched Organization information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1147                 return array_merge($siteinfo, $jsonldinfo);
1148         }
1149
1150         /**
1151          * Fetch data from the provided JSON-LD Person type
1152          * @see https://schema.org/Person
1153          *
1154          * @param array $siteinfo
1155          * @param array $jsonld
1156          *
1157          * @return array siteinfo
1158          */
1159         private static function parseJsonLdWebPerson(array $siteinfo, array $jsonld): array
1160         {
1161                 $jsonldinfo = [];
1162
1163                 $content = JsonLD::fetchElement($jsonld, 'name');
1164                 if (!empty($content) && is_string($content)) {
1165                         $jsonldinfo['author_name'] = trim($content);
1166                 }
1167
1168                 $content = JsonLD::fetchElement($jsonld, 'description');
1169                 if (!empty($content) && is_string($content)) {
1170                         $jsonldinfo['author_description'] = trim($content);
1171                 }
1172
1173                 $content = JsonLD::fetchElement($jsonld, 'sameAs');
1174                 if (!empty($content) && is_string($content)) {
1175                         $jsonldinfo['author_url'] = trim($content);
1176                 }
1177
1178                 $content = JsonLD::fetchElement($jsonld, 'url');
1179                 if (!empty($content) && is_string($content)) {
1180                         $jsonldinfo['author_url'] = trim($content);
1181                 }
1182
1183                 $content = JsonLD::fetchElement($jsonld, 'image', 'url', '@type', 'ImageObject');
1184                 if (!empty($content) && !is_string($content)) {
1185                         Logger::notice('Unexpected return value for the author image', ['content' => $content]);
1186                 }
1187
1188                 if (!empty($content) && is_string($content)) {
1189                         $jsonldinfo['author_img'] = trim($content);
1190                 }
1191
1192                 Logger::info('Fetched Person information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1193                 return array_merge($siteinfo, $jsonldinfo);
1194         }
1195
1196         /**
1197          * Fetch data from the provided JSON-LD MediaObject type
1198          * @see https://schema.org/MediaObject
1199          *
1200          * @param array $siteinfo
1201          * @param array $jsonld
1202          *
1203          * @return array siteinfo
1204          */
1205         private static function parseJsonLdMediaObject(array $siteinfo, array $jsonld, string $name): array
1206         {
1207                 $media = [];
1208
1209                 $content = JsonLD::fetchElement($jsonld, 'caption');
1210                 if (!empty($content) && is_string($content)) {
1211                         $media['caption'] = trim($content);
1212                 }
1213
1214                 $content = JsonLD::fetchElement($jsonld, 'url');
1215                 if (!empty($content) && is_string($content)) {
1216                         $media['url'] = trim($content);
1217                 }
1218
1219                 $content = JsonLD::fetchElement($jsonld, 'mainEntityOfPage');
1220                 if (!empty($content) && is_string($content)) {
1221                         $media['main'] = Strings::compareLink($content, $siteinfo['url']);
1222                 }
1223
1224                 $content = JsonLD::fetchElement($jsonld, 'description');
1225                 if (!empty($content) && is_string($content)) {
1226                         $media['description'] = trim($content);
1227                 }
1228
1229                 $content = JsonLD::fetchElement($jsonld, 'name');
1230                 if (!empty($content) && (($media['description'] ?? '') != trim($content))) {
1231                         $media['name'] = trim($content);
1232                 }
1233
1234                 $content = JsonLD::fetchElement($jsonld, 'contentUrl');
1235                 if (!empty($content) && is_string($content)) {
1236                         $media['content'] = trim($content);
1237                 }
1238
1239                 $content = JsonLD::fetchElement($jsonld, 'embedUrl');
1240                 if (!empty($content) && is_string($content)) {
1241                         $media['embed'] = trim($content);
1242                 }
1243
1244                 $content = JsonLD::fetchElement($jsonld, 'height');
1245                 if (!empty($content) && is_string($content)) {
1246                         $media['height'] = trim($content);
1247                 }
1248
1249                 $content = JsonLD::fetchElement($jsonld, 'width');
1250                 if (!empty($content) && is_string($content)) {
1251                         $media['width'] = trim($content);
1252                 }
1253
1254                 $content = JsonLD::fetchElement($jsonld, 'image');
1255                 if (!empty($content) && is_string($content)) {
1256                         $media['image'] = trim($content);
1257                 }
1258
1259                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
1260                 if (!empty($content) && (($media['image'] ?? '') != trim($content))) {
1261                         if (!empty($media['image'])) {
1262                                 $media['preview'] = trim($content);
1263                         } else {
1264                                 $media['image'] = trim($content);
1265                         }
1266                 }
1267
1268                 Logger::info('Fetched Media information', ['url' => $siteinfo['url'], 'fetched' => $media]);
1269                 $siteinfo[$name][] = $media;
1270                 return $siteinfo;
1271         }
1272 }