src/Util/ParseUrl.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, 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\Core\Hook;
  28 use Friendica\Core\Logger;
  29 use Friendica\Database\Database;
  30 use Friendica\Database\DBA;
  31 use Friendica\DI;
  32 use Friendica\Network\HTTPException;
  33 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
  34
  35 /**
  36  * Get information about a given URL
  37  *
  38  * Class with methods for extracting certain content from an url
  39  */
  40 class ParseUrl
  41 {
  42         const DEFAULT_EXPIRATION_FAILURE = 'now + 1 day';
  43         const DEFAULT_EXPIRATION_SUCCESS = 'now + 3 months';
  44
  45         /**
  46          * Maximum number of characters for the description
  47          */
  48         const MAX_DESC_COUNT = 250;
  49
  50         /**
  51          * Minimum number of characters for the description
  52          */
  53         const MIN_DESC_COUNT = 100;
  54
  55         /**
  56          * Fetch the content type of the given url
  57          * @param string $url URL of the page
  58          * @return array content type
  59          */
  60         public static function getContentType(string $url)
  61         {
  62                 $curlResult = DI::httpClient()->head($url);
  63
  64                 // Workaround for systems that can't handle a HEAD request
  65                 if (!$curlResult->isSuccess() && ($curlResult->getReturnCode() == 405)) {
  66                         $curlResult = DI::httpClient()->get($url, [HttpClientOptions::CONTENT_LENGTH => 1000000]);
  67                 }
  68
  69                 if (!$curlResult->isSuccess()) {
  70                         return [];
  71                 }
  72
  73                 $contenttype =  $curlResult->getHeader('Content-Type')[0] ?? '';
  74                 if (empty($contenttype)) {
  75                         return [];
  76                 }
  77
  78                 return explode('/', current(explode(';', $contenttype)));
  79         }
  80
  81         /**
  82          * Search for chached embeddable data of an url otherwise fetch it
  83          *
  84          * @param string $url         The url of the page which should be scraped
  85          * @param bool   $do_oembed   The false option is used by the function fetch_oembed()
  86          *                            to avoid endless loops
  87          *
  88          * @return array which contains needed data for embedding
  89          *    string 'url'      => The url of the parsed page
  90          *    string 'type'     => Content type
  91          *    string 'title'    => (optional) The title of the content
  92          *    string 'text'     => (optional) The description for the content
  93          *    string 'image'    => (optional) A preview image of the content
  94          *    array  'images'   => (optional) Array of preview pictures
  95          *    string 'keywords' => (optional) The tags which belong to the content
  96          *
  97          * @throws HTTPException\InternalServerErrorException
  98          * @see   ParseUrl::getSiteinfo() for more information about scraping
  99          * embeddable content
 100          */
 101         public static function getSiteinfoCached($url, $do_oembed = true): array
 102         {
 103                 if (empty($url)) {
 104                         return [
 105                                 'url' => '',
 106                                 'type' => 'error',
 107                         ];
 108                 }
 109
 110                 $urlHash = hash('sha256', $url);
 111
 112                 $parsed_url = DBA::selectFirst('parsed_url', ['content'],
 113                         ['url_hash' => $urlHash, 'oembed' => $do_oembed]
 114                 );
 115                 if (!empty($parsed_url['content'])) {
 116                         $data = unserialize($parsed_url['content']);
 117                         return $data;
 118                 }
 119
 120                 $data = self::getSiteinfo($url, $do_oembed);
 121
 122                 $expires = $data['expires'];
 123
 124                 unset($data['expires']);
 125
 126                 DI::dba()->insert(
 127                         'parsed_url',
 128                         [
 129                                 'url_hash' => $urlHash,
 130                                 'oembed'   => $do_oembed,
 131                                 'url'      => $url,
 132                                 'content'  => serialize($data),
 133                                 'created'  => DateTimeFormat::utcNow(),
 134                                 'expires'  => $expires,
 135                         ],
 136                         Database::INSERT_UPDATE
 137                 );
 138
 139                 return $data;
 140         }
 141
 142         /**
 143          * Parse a page for embeddable content information
 144          *
 145          * This method parses to url for meta data which can be used to embed
 146          * the content. If available it prioritizes Open Graph meta tags.
 147          * If this is not available it uses the twitter cards meta tags.
 148          * As fallback it uses standard html elements with meta informations
 149          * like \<title\>Awesome Title\</title\> or
 150          * \<meta name="description" content="An awesome description"\>
 151          *
 152          * @param string $url         The url of the page which should be scraped
 153          * @param bool   $do_oembed   The false option is used by the function fetch_oembed()
 154          *                            to avoid endless loops
 155          * @param int    $count       Internal counter to avoid endless loops
 156          *
 157          * @return array which contains needed data for embedding
 158          *    string 'url'      => The url of the parsed page
 159          *    string 'type'     => Content type (error, link, photo, image, audio, video)
 160          *    string 'title'    => (optional) The title of the content
 161          *    string 'text'     => (optional) The description for the content
 162          *    string 'image'    => (optional) A preview image of the content
 163          *    array  'images'   => (optional) Array of preview pictures
 164          *    string 'keywords' => (optional) The tags which belong to the content
 165          *
 166          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 167          * @todo  https://developers.google.com/+/plugins/snippet/
 168          * @verbatim
 169          * <meta itemprop="name" content="Awesome title">
 170          * <meta itemprop="description" content="An awesome description">
 171          * <meta itemprop="image" content="http://maple.libertreeproject.org/images/tree-icon.png">
 172          *
 173          * <body itemscope itemtype="http://schema.org/Product">
 174          *   <h1 itemprop="name">Shiny Trinket</h1>
 175          *   <img itemprop="image" src="{image-url}" />
 176          *   <p itemprop="description">Shiny trinkets are shiny.</p>
 177          * </body>
 178          * @endverbatim
 179          */
 180         public static function getSiteinfo($url, $do_oembed = true, $count = 1)
 181         {
 182                 if (empty($url)) {
 183                         return [
 184                                 'url' => '',
 185                                 'type' => 'error',
 186                         ];
 187                 }
 188
 189                 // Check if the URL does contain a scheme
 190                 $scheme = parse_url($url, PHP_URL_SCHEME);
 191
 192                 if ($scheme == '') {
 193                         $url = 'http://' . ltrim($url, '/');
 194                 }
 195
 196                 $url = trim($url, "'\"");
 197
 198                 $url = Network::stripTrackingQueryParams($url);
 199
 200                 $siteinfo = [
 201                         'url' => $url,
 202                         'type' => 'link',
 203                         'expires' => DateTimeFormat::utc(self::DEFAULT_EXPIRATION_FAILURE),
 204                 ];
 205
 206                 if ($count > 10) {
 207                         Logger::notice('Endless loop detected', ['url' => $url]);
 208                         return $siteinfo;
 209                 }
 210
 211                 $type = self::getContentType($url);
 212                 Logger::info('Got content-type', ['content-type' => $type, 'url' => $url]);
 213                 if (!empty($type) && in_array($type[0], ['image', 'video', 'audio'])) {
 214                         $siteinfo['type'] = $type[0];
 215                         return $siteinfo;
 216                 }
 217
 218                 if ((count($type) >= 2) && (($type[0] != 'text') || ($type[1] != 'html'))) {
 219                         Logger::info('Unparseable content-type, quitting here, ', ['content-type' => $type, 'url' => $url]);
 220                         return $siteinfo;
 221                 }
 222
 223                 $curlResult = DI::httpClient()->get($url, [HttpClientOptions::CONTENT_LENGTH => 1000000]);
 224                 if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
 225                         Logger::info('Empty body or error when fetching', ['url' => $url, 'success' => $curlResult->isSuccess(), 'code' => $curlResult->getReturnCode()]);
 226                         return $siteinfo;
 227                 }
 228
 229                 $siteinfo['expires'] = DateTimeFormat::utc(self::DEFAULT_EXPIRATION_SUCCESS);
 230
 231                 if ($cacheControlHeader = $curlResult->getHeader('Cache-Control')[0] ?? '') {
 232                         if (preg_match('/max-age=([0-9]+)/i', $cacheControlHeader, $matches)) {
 233                                 $maxAge = max(86400, (int)array_pop($matches));
 234                                 $siteinfo['expires'] = DateTimeFormat::utc("now + $maxAge seconds");
 235                         }
 236                 }
 237
 238                 $body = $curlResult->getBody();
 239
 240                 if ($do_oembed) {
 241                         $oembed_data = OEmbed::fetchURL($url, false, false);
 242
 243                         if (!empty($oembed_data->type)) {
 244                                 if (!in_array($oembed_data->type, ['error', 'rich', 'image', 'video', 'audio', ''])) {
 245                                         $siteinfo['type'] = $oembed_data->type;
 246                                 }
 247
 248                                 // See https://github.com/friendica/friendica/pull/5763#discussion_r217913178
 249                                 if ($siteinfo['type'] != 'photo') {
 250                                         if (!empty($oembed_data->title)) {
 251                                                 $siteinfo['title'] = trim($oembed_data->title);
 252                                         }
 253                                         if (!empty($oembed_data->description)) {
 254                                                 $siteinfo['text'] = trim($oembed_data->description);
 255                                         }
 256                                         if (!empty($oembed_data->author_name)) {
 257                                                 $siteinfo['author_name'] = trim($oembed_data->author_name);
 258                                         }
 259                                         if (!empty($oembed_data->author_url)) {
 260                                                 $siteinfo['author_url'] = trim($oembed_data->author_url);
 261                                         }
 262                                         if (!empty($oembed_data->provider_name)) {
 263                                                 $siteinfo['publisher_name'] = trim($oembed_data->provider_name);
 264                                         }
 265                                         if (!empty($oembed_data->provider_url)) {
 266                                                 $siteinfo['publisher_url'] = trim($oembed_data->provider_url);
 267                                         }
 268                                         if (!empty($oembed_data->thumbnail_url)) {
 269                                                 $siteinfo['image'] = $oembed_data->thumbnail_url;
 270                                         }
 271                                 }
 272                         }
 273                 }
 274
 275                 $charset = '';
 276                 // Look for a charset, first in headers
 277                 // Expected form: Content-Type: text/html; charset=ISO-8859-4
 278                 if (preg_match('/charset=([a-z0-9-_.\/]+)/i', $curlResult->getContentType(), $matches)) {
 279                         $charset = trim(trim(trim(array_pop($matches)), ';,'));
 280                 }
 281
 282                 // Then in body that gets precedence
 283                 // Expected forms:
 284                 // - <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 285                 // - <meta charset="utf-8">
 286                 // - <meta charset=utf-8>
 287                 // - <meta charSet="utf-8">
 288                 // We escape <style> and <script> tags since they can contain irrelevant charset information
 289                 // (see https://github.com/friendica/friendica/issues/9251#issuecomment-698636806)
 290                 Strings::performWithEscapedBlocks($body, '#<(?:style|script).*?</(?:style|script)>#ism', function ($body) use (&$charset) {
 291                         if (preg_match('/charset=["\']?([a-z0-9-_.\/]+)/i', $body, $matches)) {
 292                                 $charset = trim(trim(trim(array_pop($matches)), ';,'));
 293                         }
 294                 });
 295
 296                 $siteinfo['charset'] = $charset;
 297
 298                 if ($charset && strtoupper($charset) != 'UTF-8') {
 299                         // See https://github.com/friendica/friendica/issues/5470#issuecomment-418351211
 300                         $charset = str_ireplace('latin-1', 'latin1', $charset);
 301
 302                         Logger::info('detected charset', ['charset' => $charset]);
 303                         $body = iconv($charset, 'UTF-8//TRANSLIT', $body);
 304                 }
 305
 306                 $body = mb_convert_encoding($body, 'HTML-ENTITIES', 'UTF-8');
 307
 308                 $doc = new DOMDocument();
 309                 @$doc->loadHTML($body);
 310
 311                 XML::deleteNode($doc, 'style');
 312                 XML::deleteNode($doc, 'option');
 313                 XML::deleteNode($doc, 'h1');
 314                 XML::deleteNode($doc, 'h2');
 315                 XML::deleteNode($doc, 'h3');
 316                 XML::deleteNode($doc, 'h4');
 317                 XML::deleteNode($doc, 'h5');
 318                 XML::deleteNode($doc, 'h6');
 319                 XML::deleteNode($doc, 'ol');
 320                 XML::deleteNode($doc, 'ul');
 321
 322                 $xpath = new DOMXPath($doc);
 323
 324                 $list = $xpath->query('//meta[@content]');
 325                 foreach ($list as $node) {
 326                         $meta_tag = [];
 327                         if ($node->attributes->length) {
 328                                 foreach ($node->attributes as $attribute) {
 329                                         $meta_tag[$attribute->name] = $attribute->value;
 330                                 }
 331                         }
 332
 333                         if (@$meta_tag['http-equiv'] == 'refresh') {
 334                                 $path = $meta_tag['content'];
 335                                 $pathinfo = explode(';', $path);
 336                                 $content = '';
 337                                 foreach ($pathinfo as $value) {
 338                                         if (substr(strtolower($value), 0, 4) == 'url=') {
 339                                                 $content = substr($value, 4);
 340                                         }
 341                                 }
 342                                 if ($content != '') {
 343                                         $siteinfo = self::getSiteinfo($content, $do_oembed, ++$count);
 344                                         return $siteinfo;
 345                                 }
 346                         }
 347                 }
 348
 349                 $list = $xpath->query('//title');
 350                 if ($list->length > 0) {
 351                         $siteinfo['title'] = trim($list->item(0)->nodeValue);
 352                 }
 353
 354                 $list = $xpath->query('//meta[@name]');
 355                 foreach ($list as $node) {
 356                         $meta_tag = [];
 357                         if ($node->attributes->length) {
 358                                 foreach ($node->attributes as $attribute) {
 359                                         $meta_tag[$attribute->name] = $attribute->value;
 360                                 }
 361                         }
 362
 363                         if (empty($meta_tag['content'])) {
 364                                 continue;
 365                         }
 366
 367                         $meta_tag['content'] = trim(html_entity_decode($meta_tag['content'], ENT_QUOTES, 'UTF-8'));
 368
 369                         switch (strtolower($meta_tag['name'])) {
 370                                 case 'fulltitle':
 371                                         $siteinfo['title'] = trim($meta_tag['content']);
 372                                         break;
 373                                 case 'description':
 374                                         $siteinfo['text'] = trim($meta_tag['content']);
 375                                         break;
 376                                 case 'thumbnail':
 377                                         $siteinfo['image'] = $meta_tag['content'];
 378                                         break;
 379                                 case 'twitter:image':
 380                                         $siteinfo['image'] = $meta_tag['content'];
 381                                         break;
 382                                 case 'twitter:image:src':
 383                                         $siteinfo['image'] = $meta_tag['content'];
 384                                         break;
 385                                 case 'twitter:description':
 386                                         $siteinfo['text'] = trim($meta_tag['content']);
 387                                         break;
 388                                 case 'twitter:title':
 389                                         $siteinfo['title'] = trim($meta_tag['content']);
 390                                         break;
 391                                 case 'twitter:player':
 392                                         $siteinfo['player']['embed'] = trim($meta_tag['content']);
 393                                         break;
 394                                 case 'twitter:player:stream':
 395                                         $siteinfo['player']['stream'] = trim($meta_tag['content']);
 396                                         break;
 397                                 case 'twitter:player:width':
 398                                         $siteinfo['player']['width'] = intval($meta_tag['content']);
 399                                         break;
 400                                 case 'twitter:player:height':
 401                                         $siteinfo['player']['height'] = intval($meta_tag['content']);
 402                                         break;
 403                                 case 'dc.title':
 404                                         $siteinfo['title'] = trim($meta_tag['content']);
 405                                         break;
 406                                 case 'dc.description':
 407                                         $siteinfo['text'] = trim($meta_tag['content']);
 408                                         break;
 409                                 case 'dc.creator':
 410                                         $siteinfo['publisher_name'] = trim($meta_tag['content']);
 411                                         break;
 412                                 case 'keywords':
 413                                         $keywords = explode(',', $meta_tag['content']);
 414                                         break;
 415                                 case 'news_keywords':
 416                                         $keywords = explode(',', $meta_tag['content']);
 417                                         break;
 418                         }
 419                 }
 420
 421                 if (isset($keywords)) {
 422                         $siteinfo['keywords'] = [];
 423                         foreach ($keywords as $keyword) {
 424                                 if (!in_array(trim($keyword), $siteinfo['keywords'])) {
 425                                         $siteinfo['keywords'][] = trim($keyword);
 426                                 }
 427                         }
 428                 }
 429
 430                 $list = $xpath->query('//meta[@property]');
 431                 foreach ($list as $node) {
 432                         $meta_tag = [];
 433                         if ($node->attributes->length) {
 434                                 foreach ($node->attributes as $attribute) {
 435                                         $meta_tag[$attribute->name] = $attribute->value;
 436                                 }
 437                         }
 438
 439                         if (!empty($meta_tag['content'])) {
 440                                 $meta_tag['content'] = trim(html_entity_decode($meta_tag['content'], ENT_QUOTES, 'UTF-8'));
 441
 442                                 switch (strtolower($meta_tag['property'])) {
 443                                         case 'og:image':
 444                                                 $siteinfo['image'] = $meta_tag['content'];
 445                                                 break;
 446                                         case 'og:image:url':
 447                                                 $siteinfo['image'] = $meta_tag['content'];
 448                                                 break;
 449                                         case 'og:image:secure_url':
 450                                                 $siteinfo['image'] = $meta_tag['content'];
 451                                                 break;
 452                                         case 'og:title':
 453                                                 $siteinfo['title'] = trim($meta_tag['content']);
 454                                                 break;
 455                                         case 'og:description':
 456                                                 $siteinfo['text'] = trim($meta_tag['content']);
 457                                                 break;
 458                                         case 'og:site_name':
 459                                                 $siteinfo['publisher_name'] = trim($meta_tag['content']);
 460                                                 break;
 461                                         case 'og:locale':
 462                                                 $siteinfo['language'] = trim($meta_tag['content']);
 463                                                 break;
 464                                         case 'og:type':
 465                                                 $siteinfo['pagetype'] = trim($meta_tag['content']);
 466                                                 break;
 467                                         case 'twitter:description':
 468                                                 $siteinfo['text'] = trim($meta_tag['content']);
 469                                                 break;
 470                                         case 'twitter:title':
 471                                                 $siteinfo['title'] = trim($meta_tag['content']);
 472                                                 break;
 473                                         case 'twitter:image':
 474                                                 $siteinfo['image'] = $meta_tag['content'];
 475                                                 break;
 476                                 }
 477                         }
 478                 }
 479
 480                 $list = $xpath->query("//script[@type='application/ld+json']");
 481                 foreach ($list as $node) {
 482                         if (!empty($node->nodeValue)) {
 483                                 if ($jsonld = json_decode($node->nodeValue, true)) {
 484                                         $siteinfo = self::parseParts($siteinfo, $jsonld);
 485                                 }
 486                         }
 487                 }
 488
 489                 if (!empty($siteinfo['player']['stream'])) {
 490                         // Only add player data to media arrays if there is no duplicate
 491                         $content_urls = array_merge(array_column($siteinfo['audio'] ?? [], 'content'), array_column($siteinfo['video'] ?? [], 'content'));
 492                         if (!in_array($siteinfo['player']['stream'], $content_urls)) {
 493                                 $contenttype = self::getContentType($siteinfo['player']['stream']);
 494                                 if (!empty($contenttype[0]) && in_array($contenttype[0], ['audio', 'video'])) {
 495                                         $media = ['content' => $siteinfo['player']['stream']];
 496
 497                                         if (!empty($siteinfo['player']['embed'])) {
 498                                                 $media['embed'] = $siteinfo['player']['embed'];
 499                                         }
 500
 501                                         $siteinfo[$contenttype[0]][] = $media;
 502                                 }
 503                         }
 504                 }
 505
 506                 if (!empty($siteinfo['image'])) {
 507                         $siteinfo['images'] = $siteinfo['images'] ?? [];
 508                         array_unshift($siteinfo['images'], ['url' => $siteinfo['image']]);
 509                         unset($siteinfo['image']);
 510                 }
 511
 512                 $siteinfo = self::checkMedia($url, $siteinfo);
 513
 514                 if (!empty($siteinfo['text']) && mb_strlen($siteinfo['text']) > self::MAX_DESC_COUNT) {
 515                         $siteinfo['text'] = mb_substr($siteinfo['text'], 0, self::MAX_DESC_COUNT) . '…';
 516                         $pos = mb_strrpos($siteinfo['text'], '.');
 517                         if ($pos > self::MIN_DESC_COUNT) {
 518                                 $siteinfo['text'] = mb_substr($siteinfo['text'], 0, $pos + 1);
 519                         }
 520                 }
 521
 522                 Logger::info('Siteinfo fetched', ['url' => $url, 'siteinfo' => $siteinfo]);
 523
 524                 Hook::callAll('getsiteinfo', $siteinfo);
 525
 526                 ksort($siteinfo);
 527
 528                 return $siteinfo;
 529         }
 530
 531         /**
 532          * Check the attached media elements.
 533          * Fix existing data and add missing data.
 534          *
 535          * @param string $page_url
 536          * @param array $siteinfo
 537          * @return array
 538          */
 539         private static function checkMedia(string $page_url, array $siteinfo) : array
 540         {
 541                 if (!empty($siteinfo['images'])) {
 542                         array_walk($siteinfo['images'], function (&$image) use ($page_url) {
 543                                 // According to the specifications someone could place a picture url into the content field as well.
 544                                 // But this doesn't seem to happen in the wild, so we don't cover it here.
 545                                 if (!empty($image['url'])) {
 546                                         $image['url'] = self::completeUrl($image['url'], $page_url);
 547                                         $photodata = Images::getInfoFromURLCached($image['url']);
 548                                         if (!empty($photodata) && ($photodata[0] > 50) && ($photodata[1] > 50)) {
 549                                                 $image['src'] = $image['url'];
 550                                                 $image['width'] = $photodata[0];
 551                                                 $image['height'] = $photodata[1];
 552                                                 $image['contenttype'] = $photodata['mime'];
 553                                                 unset($image['url']);
 554                                                 ksort($image);
 555                                         } else {
 556                                                 $image = [];
 557                                         }
 558                                 } else {
 559                                         $image = [];
 560                                 }
 561                         });
 562
 563                         $siteinfo['images'] = array_values(array_filter($siteinfo['images']));
 564                 }
 565
 566                 foreach (['audio', 'video'] as $element) {
 567                         if (!empty($siteinfo[$element])) {
 568                                 array_walk($siteinfo[$element], function (&$media) use ($page_url, &$siteinfo) {
 569                                         $url = '';
 570                                         $embed = '';
 571                                         $content = '';
 572                                         $contenttype = '';
 573                                         foreach (['embed', 'content', 'url'] as $field) {
 574                                                 if (!empty($media[$field])) {
 575                                                         $media[$field] = self::completeUrl($media[$field], $page_url);
 576                                                         $type = self::getContentType($media[$field]);
 577                                                         if (($type[0] ?? '') == 'text') {
 578                                                                 if ($field == 'embed') {
 579                                                                         $embed = $media[$field];
 580                                                                 } else {
 581                                                                         $url = $media[$field];
 582                                                                 }
 583                                                         } elseif (!empty($type[0])) {
 584                                                                 $content = $media[$field];
 585                                                                 $contenttype = implode('/', $type);
 586                                                         }
 587                                                 }
 588                                                 unset($media[$field]);
 589                                         }
 590
 591                                         foreach (['image', 'preview'] as $field) {
 592                                                 if (!empty($media[$field])) {
 593                                                         $media[$field] = self::completeUrl($media[$field], $page_url);
 594                                                 }
 595                                         }
 596
 597                                         if (!empty($url)) {
 598                                                 $media['url'] = $url;
 599                                         }
 600                                         if (!empty($embed)) {
 601                                                 $media['embed'] = $embed;
 602                                                 if (empty($siteinfo['player']['embed'])) {
 603                                                         $siteinfo['player']['embed'] = $embed;
 604                                                 }
 605                                         }
 606                                         if (!empty($content)) {
 607                                                 $media['src'] = $content;
 608                                         }
 609                                         if (!empty($contenttype)) {
 610                                                 $media['contenttype'] = $contenttype;
 611                                         }
 612                                         if (empty($url) && empty($content) && empty($embed)) {
 613                                                 $media = [];
 614                                         }
 615                                         ksort($media);
 616                                 });
 617
 618                                 $siteinfo[$element] = array_values(array_filter($siteinfo[$element]));
 619                         }
 620                         if (empty($siteinfo[$element])) {
 621                                 unset($siteinfo[$element]);
 622                         }
 623                 }
 624                 return $siteinfo;
 625         }
 626
 627         /**
 628          * Convert tags from CSV to an array
 629          *
 630          * @param string $string Tags
 631          * @return array with formatted Hashtags
 632          */
 633         public static function convertTagsToArray($string)
 634         {
 635                 $arr_tags = str_getcsv($string);
 636                 if (count($arr_tags)) {
 637                         // add the # sign to every tag
 638                         array_walk($arr_tags, ["self", "arrAddHashes"]);
 639
 640                         return $arr_tags;
 641                 }
 642         }
 643
 644         /**
 645          * Add a hasht sign to a string
 646          *
 647          * This method is used as callback function
 648          *
 649          * @param string $tag The pure tag name
 650          * @param int    $k   Counter for internal use
 651          * @return void
 652          */
 653         private static function arrAddHashes(&$tag, $k)
 654         {
 655                 $tag = "#" . $tag;
 656         }
 657
 658         /**
 659          * Add a scheme to an url
 660          *
 661          * The src attribute of some html elements (e.g. images)
 662          * can miss the scheme so we need to add the correct
 663          * scheme
 664          *
 665          * @param string $url    The url which possibly does have
 666          *                       a missing scheme (a link to an image)
 667          * @param string $scheme The url with a correct scheme
 668          *                       (e.g. the url from the webpage which does contain the image)
 669          *
 670          * @return string The url with a scheme
 671          */
 672         private static function completeUrl($url, $scheme)
 673         {
 674                 $urlarr = parse_url($url);
 675
 676                 // If the url does allready have an scheme
 677                 // we can stop the process here
 678                 if (isset($urlarr["scheme"])) {
 679                         return($url);
 680                 }
 681
 682                 $schemearr = parse_url($scheme);
 683
 684                 $complete = $schemearr["scheme"]."://".$schemearr["host"];
 685
 686                 if (!empty($schemearr["port"])) {
 687                         $complete .= ":".$schemearr["port"];
 688                 }
 689
 690                 if (!empty($urlarr["path"])) {
 691                         if (strpos($urlarr["path"], "/") !== 0) {
 692                                 $complete .= "/";
 693                         }
 694
 695                         $complete .= $urlarr["path"];
 696                 }
 697
 698                 if (!empty($urlarr["query"])) {
 699                         $complete .= "?".$urlarr["query"];
 700                 }
 701
 702                 if (!empty($urlarr["fragment"])) {
 703                         $complete .= "#".$urlarr["fragment"];
 704                 }
 705
 706                 return($complete);
 707         }
 708
 709         /**
 710          * Parse the Json-Ld parts of a web page
 711          *
 712          * @param array $siteinfo
 713          * @param array $jsonld
 714          * @return array siteinfo
 715          */
 716         private static function parseParts(array $siteinfo, array $jsonld)
 717         {
 718                 if (!empty($jsonld['@graph']) && is_array($jsonld['@graph'])) {
 719                         foreach ($jsonld['@graph'] as $part) {
 720                                 if (!empty($part) && is_array($part)) {
 721                                         $siteinfo = self::parseParts($siteinfo, $part);
 722                                 }
 723                         }
 724                 } elseif (!empty($jsonld['@type'])) {
 725                         $siteinfo = self::parseJsonLd($siteinfo, $jsonld);
 726                 } elseif (!empty($jsonld)) {
 727                         $keys = array_keys($jsonld);
 728                         $numeric_keys = true;
 729                         foreach ($keys as $key) {
 730                                 if (!is_int($key)) {
 731                                         $numeric_keys = false;
 732                                 }
 733                         }
 734                         if ($numeric_keys) {
 735                                 foreach ($jsonld as $part) {
 736                                         if (!empty($part) && is_array($part)) {
 737                                                 $siteinfo = self::parseParts($siteinfo, $part);
 738                                         }
 739                                 }
 740                         }
 741                 }
 742
 743                 array_walk_recursive($siteinfo, function (&$element) {
 744                         if (is_string($element)) {
 745                                 $element = trim(strip_tags(html_entity_decode($element, ENT_COMPAT, 'UTF-8')));
 746                         }
 747                 });
 748
 749                 return $siteinfo;
 750         }
 751
 752         /**
 753          * Improve the siteinfo with information from the provided JSON-LD information
 754          * @see https://jsonld.com/
 755          * @see https://schema.org/
 756          *
 757          * @param array $siteinfo
 758          * @param array $jsonld
 759          * @return array siteinfo
 760          */
 761         private static function parseJsonLd(array $siteinfo, array $jsonld)
 762         {
 763                 $type = JsonLD::fetchElement($jsonld, '@type');
 764                 if (empty($type)) {
 765                         Logger::info('Empty type', ['url' => $siteinfo['url']]);
 766                         return $siteinfo;
 767                 }
 768
 769                 // Silently ignore some types that aren't processed
 770                 if (in_array($type, ['SiteNavigationElement', 'JobPosting', 'CreativeWork', 'MusicAlbum',
 771                         'WPHeader', 'WPSideBar', 'WPFooter', 'LegalService', 'MusicRecording',
 772                         'ItemList', 'BreadcrumbList', 'Blog', 'Dataset', 'Product'])) {
 773                         return $siteinfo;
 774                 }
 775
 776                 switch ($type) {
 777                         case 'Article':
 778                         case 'AdvertiserContentArticle':
 779                         case 'NewsArticle':
 780                         case 'Report':
 781                         case 'SatiricalArticle':
 782                         case 'ScholarlyArticle':
 783                         case 'SocialMediaPosting':
 784                         case 'TechArticle':
 785                         case 'ReportageNewsArticle':
 786                         case 'SocialMediaPosting':
 787                         case 'BlogPosting':
 788                         case 'LiveBlogPosting':
 789                         case 'DiscussionForumPosting':
 790                                 return self::parseJsonLdArticle($siteinfo, $jsonld);
 791                         case 'WebPage':
 792                         case 'AboutPage':
 793                         case 'CheckoutPage':
 794                         case 'CollectionPage':
 795                         case 'ContactPage':
 796                         case 'FAQPage':
 797                         case 'ItemPage':
 798                         case 'MedicalWebPage':
 799                         case 'ProfilePage':
 800                         case 'QAPage':
 801                         case 'RealEstateListing':
 802                         case 'SearchResultsPage':
 803                         case 'MediaGallery':
 804                         case 'ImageGallery':
 805                         case 'VideoGallery':
 806                         case 'RadioEpisode':
 807                         case 'Event':
 808                                 return self::parseJsonLdWebPage($siteinfo, $jsonld);
 809                         case 'WebSite':
 810                                 return self::parseJsonLdWebSite($siteinfo, $jsonld);
 811                         case 'Organization':
 812                         case 'Airline':
 813                         case 'Consortium':
 814                         case 'Corporation':
 815                         case 'EducationalOrganization':
 816                         case 'FundingScheme':
 817                         case 'GovernmentOrganization':
 818                         case 'LibrarySystem':
 819                         case 'LocalBusiness':
 820                         case 'MedicalOrganization':
 821                         case 'NGO':
 822                         case 'NewsMediaOrganization':
 823                         case 'Project':
 824                         case 'SportsOrganization':
 825                         case 'WorkersUnion':
 826                                 return self::parseJsonLdWebOrganization($siteinfo, $jsonld);
 827                         case 'Person':
 828                         case 'Patient':
 829                         case 'PerformingGroup':
 830                         case 'DanceGroup';
 831                         case 'MusicGroup':
 832                         case 'TheaterGroup':
 833                                 return self::parseJsonLdWebPerson($siteinfo, $jsonld);
 834                         case 'AudioObject':
 835                         case 'Audio':
 836                                 return self::parseJsonLdMediaObject($siteinfo, $jsonld, 'audio');
 837                         case 'VideoObject':
 838                                 return self::parseJsonLdMediaObject($siteinfo, $jsonld, 'video');
 839                         case 'ImageObject':
 840                                 return self::parseJsonLdMediaObject($siteinfo, $jsonld, 'images');
 841                         default:
 842                                 Logger::info('Unknown type', ['type' => $type, 'url' => $siteinfo['url']]);
 843                                 return $siteinfo;
 844                 }
 845         }
 846
 847         /**
 848          * Fetch author and publisher data
 849          *
 850          * @param array $siteinfo
 851          * @param array $jsonld
 852          * @return array siteinfo
 853          */
 854         private static function parseJsonLdAuthor(array $siteinfo, array $jsonld)
 855         {
 856                 $jsonldinfo = [];
 857
 858                 if (!empty($jsonld['publisher']) && is_array($jsonld['publisher'])) {
 859                         $content = JsonLD::fetchElement($jsonld, 'publisher', 'name');
 860                         if (!empty($content) && is_string($content)) {
 861                                 $jsonldinfo['publisher_name'] = trim($content);
 862                         }
 863
 864                         $content = JsonLD::fetchElement($jsonld, 'publisher', 'url');
 865                         if (!empty($content) && is_string($content)) {
 866                                 $jsonldinfo['publisher_url'] = trim($content);
 867                         }
 868
 869                         $brand = JsonLD::fetchElement($jsonld, 'publisher', 'brand', '@type', 'Organization');
 870                         if (!empty($brand) && is_array($brand)) {
 871                                 $content = JsonLD::fetchElement($brand, 'name');
 872                                 if (!empty($content) && is_string($content)) {
 873                                         $jsonldinfo['publisher_name'] = trim($content);
 874                                 }
 875
 876                                 $content = JsonLD::fetchElement($brand, 'url');
 877                                 if (!empty($content) && is_string($content)) {
 878                                         $jsonldinfo['publisher_url'] = trim($content);
 879                                 }
 880
 881                                 $content = JsonLD::fetchElement($brand, 'logo', 'url');
 882                                 if (!empty($content) && is_string($content)) {
 883                                         $jsonldinfo['publisher_img'] = trim($content);
 884                                 }
 885                         }
 886
 887                         $logo = JsonLD::fetchElement($jsonld, 'publisher', 'logo');
 888                         if (!empty($logo) && is_array($logo)) {
 889                                 $content = JsonLD::fetchElement($logo, 'url');
 890                                 if (!empty($content) && is_string($content)) {
 891                                         $jsonldinfo['publisher_img'] = trim($content);
 892                                 }
 893                         }
 894                 } elseif (!empty($jsonld['publisher']) && is_string($jsonld['publisher'])) {
 895                         $jsonldinfo['publisher_name'] = trim($jsonld['publisher']);
 896                 }
 897
 898                 if (!empty($jsonld['author']) && is_array($jsonld['author'])) {
 899                         $content = JsonLD::fetchElement($jsonld, 'author', 'name');
 900                         if (!empty($content) && is_string($content)) {
 901                                 $jsonldinfo['author_name'] = trim($content);
 902                         }
 903
 904                         $content = JsonLD::fetchElement($jsonld, 'author', 'sameAs');
 905                         if (!empty($content) && is_string($content)) {
 906                                 $jsonldinfo['author_url'] = trim($content);
 907                         }
 908
 909                         $content = JsonLD::fetchElement($jsonld, 'author', 'url');
 910                         if (!empty($content) && is_string($content)) {
 911                                 $jsonldinfo['author_url'] = trim($content);
 912                         }
 913
 914                         $logo = JsonLD::fetchElement($jsonld, 'author', 'logo');
 915                         if (!empty($logo) && is_array($logo)) {
 916                                 $content = JsonLD::fetchElement($logo, 'url');
 917                                 if (!empty($content) && is_string($content)) {
 918                                         $jsonldinfo['author_img'] = trim($content);
 919                                 }
 920                         }
 921                 } elseif (!empty($jsonld['author']) && is_string($jsonld['author'])) {
 922                         $jsonldinfo['author_name'] = trim($jsonld['author']);
 923                 }
 924
 925                 Logger::info('Fetched Author information', ['fetched' => $jsonldinfo]);
 926
 927                 return array_merge($siteinfo, $jsonldinfo);
 928         }
 929
 930         /**
 931          * Fetch data from the provided JSON-LD Article type
 932          * @see https://schema.org/Article
 933          *
 934          * @param array $siteinfo
 935          * @param array $jsonld
 936          * @return array siteinfo
 937          */
 938         private static function parseJsonLdArticle(array $siteinfo, array $jsonld)
 939         {
 940                 $jsonldinfo = [];
 941
 942                 $content = JsonLD::fetchElement($jsonld, 'headline');
 943                 if (!empty($content) && is_string($content)) {
 944                         $jsonldinfo['title'] = trim($content);
 945                 }
 946
 947                 $content = JsonLD::fetchElement($jsonld, 'alternativeHeadline');
 948                 if (!empty($content) && is_string($content) && (($jsonldinfo['title'] ?? '') != trim($content))) {
 949                         $jsonldinfo['alternative_title'] = trim($content);
 950                 }
 951
 952                 $content = JsonLD::fetchElement($jsonld, 'description');
 953                 if (!empty($content) && is_string($content)) {
 954                         $jsonldinfo['text'] = trim($content);
 955                 }
 956
 957                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
 958                 if (!empty($content)) {
 959                         $jsonldinfo['image'] = trim($content);
 960                 }
 961
 962                 $content = JsonLD::fetchElement($jsonld, 'image', 'url', '@type', 'ImageObject');
 963                 if (!empty($content) && is_string($content)) {
 964                         $jsonldinfo['image'] = trim($content);
 965                 }
 966
 967                 if (!empty($jsonld['keywords']) && !is_array($jsonld['keywords'])) {
 968                         $content = JsonLD::fetchElement($jsonld, 'keywords');
 969                         if (!empty($content)) {
 970                                 $siteinfo['keywords'] = [];
 971                                 $keywords = explode(',', $content);
 972                                 foreach ($keywords as $keyword) {
 973                                         $siteinfo['keywords'][] = trim($keyword);
 974                                 }
 975                         }
 976                 } elseif (!empty($jsonld['keywords'])) {
 977                         $content = JsonLD::fetchElementArray($jsonld, 'keywords');
 978                         if (!empty($content) && is_array($content)) {
 979                                 $jsonldinfo['keywords'] = $content;
 980                         }
 981                 }
 982
 983                 $content = JsonLD::fetchElement($jsonld, 'datePublished');
 984                 if (!empty($content) && is_string($content)) {
 985                         $jsonldinfo['published'] = DateTimeFormat::utc($content);
 986                 }
 987
 988                 $content = JsonLD::fetchElement($jsonld, 'dateModified');
 989                 if (!empty($content) && is_string($content)) {
 990                         $jsonldinfo['modified'] = DateTimeFormat::utc($content);
 991                 }
 992
 993                 $jsonldinfo = self::parseJsonLdAuthor($jsonldinfo, $jsonld);
 994
 995                 Logger::info('Fetched article information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
 996
 997                 return array_merge($siteinfo, $jsonldinfo);
 998         }
 999
1000         /**
1001          * Fetch data from the provided JSON-LD WebPage type
1002          * @see https://schema.org/WebPage
1003          *
1004          * @param array $siteinfo
1005          * @param array $jsonld
1006          * @return array siteinfo
1007          */
1008         private static function parseJsonLdWebPage(array $siteinfo, array $jsonld)
1009         {
1010                 $jsonldinfo = [];
1011
1012                 $content = JsonLD::fetchElement($jsonld, 'name');
1013                 if (!empty($content)) {
1014                         $jsonldinfo['title'] = trim($content);
1015                 }
1016
1017                 $content = JsonLD::fetchElement($jsonld, 'description');
1018                 if (!empty($content)) {
1019                         $jsonldinfo['text'] = trim($content);
1020                 }
1021
1022                 $content = JsonLD::fetchElement($jsonld, 'image');
1023                 if (!empty($content)) {
1024                         $jsonldinfo['image'] = trim($content);
1025                 }
1026
1027                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
1028                 if (!empty($content)) {
1029                         $jsonldinfo['image'] = trim($content);
1030                 }
1031
1032                 $jsonldinfo = self::parseJsonLdAuthor($jsonldinfo, $jsonld);
1033
1034                 Logger::info('Fetched WebPage information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1035
1036                 return array_merge($siteinfo, $jsonldinfo);
1037         }
1038
1039         /**
1040          * Fetch data from the provided JSON-LD WebSite type
1041          * @see https://schema.org/WebSite
1042          *
1043          * @param array $siteinfo
1044          * @param array $jsonld
1045          * @return array siteinfo
1046          */
1047         private static function parseJsonLdWebSite(array $siteinfo, array $jsonld)
1048         {
1049                 $jsonldinfo = [];
1050
1051                 $content = JsonLD::fetchElement($jsonld, 'name');
1052                 if (!empty($content)) {
1053                         $jsonldinfo['publisher_name'] = trim($content);
1054                 }
1055
1056                 $content = JsonLD::fetchElement($jsonld, 'description');
1057                 if (!empty($content)) {
1058                         $jsonldinfo['publisher_description'] = trim($content);
1059                 }
1060
1061                 $content = JsonLD::fetchElement($jsonld, 'url');
1062                 if (!empty($content)) {
1063                         $jsonldinfo['publisher_url'] = trim($content);
1064                 }
1065
1066                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
1067                 if (!empty($content)) {
1068                         $jsonldinfo['image'] = trim($content);
1069                 }
1070
1071                 $jsonldinfo = self::parseJsonLdAuthor($jsonldinfo, $jsonld);
1072
1073                 Logger::info('Fetched WebSite information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1074                 return array_merge($siteinfo, $jsonldinfo);
1075         }
1076
1077         /**
1078          * Fetch data from the provided JSON-LD Organization type
1079          * @see https://schema.org/Organization
1080          *
1081          * @param array $siteinfo
1082          * @param array $jsonld
1083          * @return array siteinfo
1084          */
1085         private static function parseJsonLdWebOrganization(array $siteinfo, array $jsonld)
1086         {
1087                 $jsonldinfo = [];
1088
1089                 $content = JsonLD::fetchElement($jsonld, 'name');
1090                 if (!empty($content)) {
1091                         $jsonldinfo['publisher_name'] = trim($content);
1092                 }
1093
1094                 $content = JsonLD::fetchElement($jsonld, 'description');
1095                 if (!empty($content)) {
1096                         $jsonldinfo['publisher_description'] = trim($content);
1097                 }
1098
1099                 $content = JsonLD::fetchElement($jsonld, 'url');
1100                 if (!empty($content)) {
1101                         $jsonldinfo['publisher_url'] = trim($content);
1102                 }
1103
1104                 $content = JsonLD::fetchElement($jsonld, 'logo', 'url', '@type', 'ImageObject');
1105                 if (!empty($content)) {
1106                         $jsonldinfo['publisher_img'] = trim($content);
1107                 }
1108
1109                 $content = JsonLD::fetchElement($jsonld, 'brand', 'name', '@type', 'Organization');
1110                 if (!empty($content)) {
1111                         $jsonldinfo['publisher_name'] = trim($content);
1112                 }
1113
1114                 $content = JsonLD::fetchElement($jsonld, 'brand', 'url', '@type', 'Organization');
1115                 if (!empty($content)) {
1116                         $jsonldinfo['publisher_url'] = trim($content);
1117                 }
1118
1119                 Logger::info('Fetched Organization information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1120                 return array_merge($siteinfo, $jsonldinfo);
1121         }
1122
1123         /**
1124          * Fetch data from the provided JSON-LD Person type
1125          * @see https://schema.org/Person
1126          *
1127          * @param array $siteinfo
1128          * @param array $jsonld
1129          * @return array siteinfo
1130          */
1131         private static function parseJsonLdWebPerson(array $siteinfo, array $jsonld)
1132         {
1133                 $jsonldinfo = [];
1134
1135                 $content = JsonLD::fetchElement($jsonld, 'name');
1136                 if (!empty($content)) {
1137                         $jsonldinfo['author_name'] = trim($content);
1138                 }
1139
1140                 $content = JsonLD::fetchElement($jsonld, 'description');
1141                 if (!empty($content)) {
1142                         $jsonldinfo['author_description'] = trim($content);
1143                 }
1144
1145                 $content = JsonLD::fetchElement($jsonld, 'sameAs');
1146                 if (!empty($content) && is_string($content)) {
1147                         $jsonldinfo['author_url'] = trim($content);
1148                 }
1149
1150                 $content = JsonLD::fetchElement($jsonld, 'url');
1151                 if (!empty($content)) {
1152                         $jsonldinfo['author_url'] = trim($content);
1153                 }
1154
1155                 $content = JsonLD::fetchElement($jsonld, 'image', 'url', '@type', 'ImageObject');
1156                 if (!empty($content) && !is_string($content)) {
1157                         Logger::notice('Unexpected return value for the author image', ['content' => $content]);
1158                 }
1159
1160                 if (!empty($content) && is_string($content)) {
1161                         $jsonldinfo['author_img'] = trim($content);
1162                 }
1163
1164                 Logger::info('Fetched Person information', ['url' => $siteinfo['url'], 'fetched' => $jsonldinfo]);
1165                 return array_merge($siteinfo, $jsonldinfo);
1166         }
1167
1168         /**
1169          * Fetch data from the provided JSON-LD MediaObject type
1170          * @see https://schema.org/MediaObject
1171          *
1172          * @param array $siteinfo
1173          * @param array $jsonld
1174          * @return array siteinfo
1175          */
1176         private static function parseJsonLdMediaObject(array $siteinfo, array $jsonld, string $name)
1177         {
1178                 $media = [];
1179
1180                 $content = JsonLD::fetchElement($jsonld, 'caption');
1181                 if (!empty($content)) {
1182                         $media['caption'] = trim($content);
1183                 }
1184
1185                 $content = JsonLD::fetchElement($jsonld, 'url');
1186                 if (!empty($content)) {
1187                         $media['url'] = trim($content);
1188                 }
1189
1190                 $content = JsonLD::fetchElement($jsonld, 'mainEntityOfPage');
1191                 if (!empty($content)) {
1192                         $media['main'] = Strings::compareLink($content, $siteinfo['url']);
1193                 }
1194
1195                 $content = JsonLD::fetchElement($jsonld, 'description');
1196                 if (!empty($content)) {
1197                         $media['description'] = trim($content);
1198                 }
1199
1200                 $content = JsonLD::fetchElement($jsonld, 'name');
1201                 if (!empty($content) && (($media['description'] ?? '') != trim($content))) {
1202                         $media['name'] = trim($content);
1203                 }
1204
1205                 $content = JsonLD::fetchElement($jsonld, 'contentUrl');
1206                 if (!empty($content)) {
1207                         $media['content'] = trim($content);
1208                 }
1209
1210                 $content = JsonLD::fetchElement($jsonld, 'embedUrl');
1211                 if (!empty($content)) {
1212                         $media['embed'] = trim($content);
1213                 }
1214
1215                 $content = JsonLD::fetchElement($jsonld, 'height');
1216                 if (!empty($content)) {
1217                         $media['height'] = trim($content);
1218                 }
1219
1220                 $content = JsonLD::fetchElement($jsonld, 'width');
1221                 if (!empty($content)) {
1222                         $media['width'] = trim($content);
1223                 }
1224
1225                 $content = JsonLD::fetchElement($jsonld, 'image');
1226                 if (!empty($content)) {
1227                         $media['image'] = trim($content);
1228                 }
1229
1230                 $content = JsonLD::fetchElement($jsonld, 'thumbnailUrl');
1231                 if (!empty($content) && (($media['image'] ?? '') != trim($content))) {
1232                         if (!empty($media['image'])) {
1233                                 $media['preview'] = trim($content);
1234                         } else {
1235                                 $media['image'] = trim($content);
1236                         }
1237                 }
1238
1239                 Logger::info('Fetched Media information', ['url' => $siteinfo['url'], 'fetched' => $media]);
1240                 $siteinfo[$name][] = $media;
1241                 return $siteinfo;
1242         }
1243 }