src/Protocol/Feed.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   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\Protocol;
  23
  24 use DOMDocument;
  25 use DOMXPath;
  26 use Friendica\Content\PageInfo;
  27 use Friendica\Content\Text\BBCode;
  28 use Friendica\Content\Text\HTML;
  29 use Friendica\Core\Cache\Duration;
  30 use Friendica\Core\Logger;
  31 use Friendica\Core\Protocol;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Model\Contact;
  35 use Friendica\Model\Item;
  36 use Friendica\Model\Tag;
  37 use Friendica\Model\User;
  38 use Friendica\Util\DateTimeFormat;
  39 use Friendica\Util\Network;
  40 use Friendica\Util\ParseUrl;
  41 use Friendica\Util\Strings;
  42 use Friendica\Util\XML;
  43
  44 /**
  45  * This class contain functions to import feeds (RSS/RDF/Atom)
  46  */
  47 class Feed
  48 {
  49         /**
  50          * consume - process atom feed and update anything/everything we might need to update
  51          *
  52          * $xml = the (atom) feed to consume - RSS isn't as fully supported but may work for simple feeds.
  53          *
  54          * $importer = the contact_record (joined to user_record) of the local user who owns this relationship.
  55          *             It is this person's stuff that is going to be updated.
  56          * $contact =  the person who is sending us stuff. If not set, we MAY be processing a "follow" activity
  57          *             from an external network and MAY create an appropriate contact record. Otherwise, we MUST
  58          *             have a contact record.
  59          * $hub = should we find a hub declation in the feed, pass it back to our calling process, who might (or
  60          *        might not) try and subscribe to it.
  61          * $datedir sorts in reverse order
  62          * $pass - by default ($pass = 0) we cannot guarantee that a parent item has been
  63          *      imported prior to its children being seen in the stream unless we are certain
  64          *      of how the feed is arranged/ordered.
  65          * With $pass = 1, we only pull parent items out of the stream.
  66          * With $pass = 2, we only pull children (comments/likes).
  67          *
  68          * So running this twice, first with pass 1 and then with pass 2 will do the right
  69          * thing regardless of feed ordering. This won't be adequate in a fully-threaded
  70          * model where comments can have sub-threads. That would require some massive sorting
  71          * to get all the feed items into a mostly linear ordering, and might still require
  72          * recursion.
  73          *
  74          * @param       $xml
  75          * @param array $importer
  76          * @param array $contact
  77          * @param       $hub
  78          * @throws ImagickException
  79          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  80          */
  81         public static function consume($xml, array $importer, array $contact, &$hub)
  82         {
  83                 if ($contact['network'] === Protocol::OSTATUS) {
  84                         Logger::info('Consume OStatus messages');
  85                         OStatus::import($xml, $importer, $contact, $hub);
  86
  87                         return;
  88                 }
  89
  90                 if ($contact['network'] === Protocol::FEED) {
  91                         Logger::info('Consume feeds');
  92                         self::import($xml, $importer, $contact);
  93
  94                         return;
  95                 }
  96
  97                 if ($contact['network'] === Protocol::DFRN) {
  98                         Logger::info('Consume DFRN messages');
  99                         $dfrn_importer = DFRN::getImporter($contact['id'], $importer['uid']);
 100                         if (!empty($dfrn_importer)) {
 101                                 Logger::info('Now import the DFRN feed');
 102                                 DFRN::import($xml, $dfrn_importer, true);
 103                                 return;
 104                         }
 105                 }
 106         }
 107
 108         /**
 109          * Read a RSS/RDF/Atom feed and create an item entry for it
 110          *
 111          * @param string $xml      The feed data
 112          * @param array  $importer The user record of the importer
 113          * @param array  $contact  The contact record of the feed
 114          *
 115          * @return array Returns the header and the first item in dry run mode
 116          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 117          */
 118         public static function import($xml, array $importer = [], array $contact = [])
 119         {
 120                 $dryRun = empty($importer) && empty($contact);
 121
 122                 if ($dryRun) {
 123                         Logger::info("Test Atom/RSS feed");
 124                 } else {
 125                         Logger::info("Import Atom/RSS feed '" . $contact["name"] . "' (Contact " . $contact["id"] . ") for user " . $importer["uid"]);
 126                 }
 127
 128                 if (empty($xml)) {
 129                         Logger::info('XML is empty.');
 130                         return [];
 131                 }
 132
 133                 if (!empty($contact['poll'])) {
 134                         $basepath = $contact['poll'];
 135                 } elseif (!empty($contact['url'])) {
 136                         $basepath = $contact['url'];
 137                 } else {
 138                         $basepath = '';
 139                 }
 140
 141                 $doc = new DOMDocument();
 142                 @$doc->loadXML(trim($xml));
 143                 $xpath = new DOMXPath($doc);
 144                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 145                 $xpath->registerNamespace('dc', "http://purl.org/dc/elements/1.1/");
 146                 $xpath->registerNamespace('content', "http://purl.org/rss/1.0/modules/content/");
 147                 $xpath->registerNamespace('rdf', "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
 148                 $xpath->registerNamespace('rss', "http://purl.org/rss/1.0/");
 149                 $xpath->registerNamespace('media', "http://search.yahoo.com/mrss/");
 150                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 151
 152                 $author = [];
 153                 $entries = null;
 154
 155                 // Is it RDF?
 156                 if ($xpath->query('/rdf:RDF/rss:channel')->length > 0) {
 157                         $author["author-link"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:link/text()');
 158                         $author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:title/text()');
 159
 160                         if (empty($author["author-name"])) {
 161                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:description/text()');
 162                         }
 163                         $entries = $xpath->query('/rdf:RDF/rss:item');
 164                 }
 165
 166                 // Is it Atom?
 167                 if ($xpath->query('/atom:feed')->length > 0) {
 168                         $alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']");
 169                         if (is_object($alternate)) {
 170                                 foreach ($alternate AS $attribute) {
 171                                         if ($attribute->name == "href") {
 172                                                 $author["author-link"] = $attribute->textContent;
 173                                         }
 174                                 }
 175                         }
 176
 177                         if (empty($author["author-link"])) {
 178                                 $self = XML::getFirstAttributes($xpath, "atom:link[@rel='self']");
 179                                 if (is_object($self)) {
 180                                         foreach ($self AS $attribute) {
 181                                                 if ($attribute->name == "href") {
 182                                                         $author["author-link"] = $attribute->textContent;
 183                                                 }
 184                                         }
 185                                 }
 186                         }
 187
 188                         if (empty($author["author-link"])) {
 189                                 $author["author-link"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:id/text()');
 190                         }
 191                         $author["author-avatar"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:logo/text()');
 192
 193                         $author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:title/text()');
 194
 195                         if (empty($author["author-name"])) {
 196                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:subtitle/text()');
 197                         }
 198
 199                         if (empty($author["author-name"])) {
 200                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:name/text()');
 201                         }
 202
 203                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()');
 204                         if ($value != "") {
 205                                 $author["author-name"] = $value;
 206                         }
 207
 208                         if ($dryRun) {
 209                                 $author["author-id"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:id/text()');
 210
 211                                 // See https://tools.ietf.org/html/rfc4287#section-3.2.2
 212                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()');
 213                                 if ($value != "") {
 214                                         $author["author-link"] = $value;
 215                                 }
 216
 217                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()');
 218                                 if ($value != "") {
 219                                         $author["author-nick"] = $value;
 220                                 }
 221
 222                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()');
 223                                 if ($value != "") {
 224                                         $author["author-location"] = $value;
 225                                 }
 226
 227                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()');
 228                                 if ($value != "") {
 229                                         $author["author-about"] = $value;
 230                                 }
 231
 232                                 $avatar = XML::getFirstAttributes($xpath, "atom:author/atom:link[@rel='avatar']");
 233                                 if (is_object($avatar)) {
 234                                         foreach ($avatar AS $attribute) {
 235                                                 if ($attribute->name == "href") {
 236                                                         $author["author-avatar"] = $attribute->textContent;
 237                                                 }
 238                                         }
 239                                 }
 240                         }
 241
 242                         $author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:updated/text()');
 243
 244                         $author["app"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:generator/text()');
 245
 246                         $entries = $xpath->query('/atom:feed/atom:entry');
 247                 }
 248
 249                 // Is it RSS?
 250                 if ($xpath->query('/rss/channel')->length > 0) {
 251                         $author["author-link"] = XML::getFirstNodeValue($xpath, '/rss/channel/link/text()');
 252
 253                         $author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/title/text()');
 254                         $author["author-avatar"] = XML::getFirstNodeValue($xpath, '/rss/channel/image/url/text()');
 255
 256                         if (empty($author["author-name"])) {
 257                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/copyright/text()');
 258                         }
 259
 260                         if (empty($author["author-name"])) {
 261                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/description/text()');
 262                         }
 263
 264                         $author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/rss/channel/pubDate/text()');
 265
 266                         $author["app"] = XML::getFirstNodeValue($xpath, '/rss/channel/generator/text()');
 267
 268                         $entries = $xpath->query('/rss/channel/item');
 269                 }
 270
 271                 if (!$dryRun) {
 272                         $author["author-link"] = $contact["url"];
 273
 274                         if (empty($author["author-name"])) {
 275                                 $author["author-name"] = $contact["name"];
 276                         }
 277
 278                         $author["author-avatar"] = $contact["thumb"];
 279
 280                         $author["owner-link"] = $contact["url"];
 281                         $author["owner-name"] = $contact["name"];
 282                         $author["owner-avatar"] = $contact["thumb"];
 283                 }
 284
 285                 $header = [];
 286                 $header["uid"] = $importer["uid"] ?? 0;
 287                 $header["network"] = Protocol::FEED;
 288                 $header["wall"] = 0;
 289                 $header["origin"] = 0;
 290                 $header["gravity"] = GRAVITY_PARENT;
 291                 $header["private"] = Item::PUBLIC;
 292                 $header["verb"] = Activity::POST;
 293                 $header["object-type"] = Activity\ObjectType::NOTE;
 294
 295                 $header["contact-id"] = $contact["id"] ?? 0;
 296
 297                 if (!is_object($entries)) {
 298                         Logger::info("There are no entries in this feed.");
 299                         return [];
 300                 }
 301
 302                 $items = [];
 303                 $creation_dates = [];
 304
 305                 // Limit the number of items that are about to be fetched
 306                 $total_items = ($entries->length - 1);
 307                 $max_items = DI::config()->get('system', 'max_feed_items');
 308                 if (($max_items > 0) && ($total_items > $max_items)) {
 309                         $total_items = $max_items;
 310                 }
 311
 312                 // Importing older entries first
 313                 for ($i = $total_items; $i >= 0; --$i) {
 314                         $entry = $entries->item($i);
 315
 316                         $item = array_merge($header, $author);
 317
 318                         $alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']", $entry);
 319                         if (!is_object($alternate)) {
 320                                 $alternate = XML::getFirstAttributes($xpath, "atom:link", $entry);
 321                         }
 322                         if (is_object($alternate)) {
 323                                 foreach ($alternate AS $attribute) {
 324                                         if ($attribute->name == "href") {
 325                                                 $item["plink"] = $attribute->textContent;
 326                                         }
 327                                 }
 328                         }
 329
 330                         if (empty($item["plink"])) {
 331                                 $item["plink"] = XML::getFirstNodeValue($xpath, 'link/text()', $entry);
 332                         }
 333
 334                         if (empty($item["plink"])) {
 335                                 $item["plink"] = XML::getFirstNodeValue($xpath, 'rss:link/text()', $entry);
 336                         }
 337
 338                         $item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 339
 340                         if (empty($item["uri"])) {
 341                                 $item["uri"] = XML::getFirstNodeValue($xpath, 'guid/text()', $entry);
 342                         }
 343
 344                         if (empty($item["uri"])) {
 345                                 $item["uri"] = $item["plink"];
 346                         }
 347
 348                         // Add the base path if missing
 349                         $item["uri"] = Network::addBasePath($item["uri"], $basepath);
 350                         $item["plink"] = Network::addBasePath($item["plink"], $basepath);
 351
 352                         $orig_plink = $item["plink"];
 353
 354                         $item["parent-uri"] = $item["uri"];
 355
 356                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 357
 358                         if (empty($item["title"])) {
 359                                 $item["title"] = XML::getFirstNodeValue($xpath, 'title/text()', $entry);
 360                         }
 361                         if (empty($item["title"])) {
 362                                 $item["title"] = XML::getFirstNodeValue($xpath, 'rss:title/text()', $entry);
 363                         }
 364
 365                         $item["title"] = html_entity_decode($item["title"], ENT_QUOTES, 'UTF-8');
 366
 367                         $published = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 368
 369                         if (empty($published)) {
 370                                 $published = XML::getFirstNodeValue($xpath, 'pubDate/text()', $entry);
 371                         }
 372
 373                         if (empty($published)) {
 374                                 $published = XML::getFirstNodeValue($xpath, 'dc:date/text()', $entry);
 375                         }
 376
 377                         $updated = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 378
 379                         if (empty($updated) && !empty($published)) {
 380                                 $updated = $published;
 381                         }
 382
 383                         if (empty($published) && !empty($updated)) {
 384                                 $published = $updated;
 385                         }
 386
 387                         if ($published != "") {
 388                                 $item["created"] = $published;
 389                         }
 390
 391                         if ($updated != "") {
 392                                 $item["edited"] = $updated;
 393                         }
 394
 395                         if (!$dryRun) {
 396                                 $condition = ["`uid` = ? AND `uri` = ? AND `network` IN (?, ?)",
 397                                         $importer["uid"], $item["uri"], Protocol::FEED, Protocol::DFRN];
 398                                 $previous = Item::selectFirst(['id', 'created'], $condition);
 399                                 if (DBA::isResult($previous)) {
 400                                         // Use the creation date when the post had been stored. It can happen this date changes in the feed.
 401                                         $creation_dates[] = $previous['created'];
 402                                         Logger::info("Item with uri " . $item["uri"] . " for user " . $importer["uid"] . " already existed under id " . $previous["id"]);
 403                                         continue;
 404                                 }
 405                                 $creation_dates[] = DateTimeFormat::utc($item['created']);
 406                         }
 407
 408                         $creator = XML::getFirstNodeValue($xpath, 'author/text()', $entry);
 409
 410                         if (empty($creator)) {
 411                                 $creator = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $entry);
 412                         }
 413
 414                         if (empty($creator)) {
 415                                 $creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
 416                         }
 417
 418                         if ($creator != "") {
 419                                 $item["author-name"] = $creator;
 420                         }
 421
 422                         $creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
 423
 424                         if ($creator != "") {
 425                                 $item["author-name"] = $creator;
 426                         }
 427
 428                         /// @TODO ?
 429                         // <category>Ausland</category>
 430                         // <media:thumbnail width="152" height="76" url="http://www.taz.de/picture/667875/192/14388767.jpg"/>
 431
 432                         $attachments = [];
 433
 434                         $enclosures = $xpath->query("enclosure|atom:link[@rel='enclosure']", $entry);
 435                         foreach ($enclosures AS $enclosure) {
 436                                 $href = "";
 437                                 $length = "";
 438                                 $type = "";
 439
 440                                 foreach ($enclosure->attributes AS $attribute) {
 441                                         if (in_array($attribute->name, ["url", "href"])) {
 442                                                 $href = $attribute->textContent;
 443                                         } elseif ($attribute->name == "length") {
 444                                                 $length = $attribute->textContent;
 445                                         } elseif ($attribute->name == "type") {
 446                                                 $type = $attribute->textContent;
 447                                         }
 448                                 }
 449
 450                                 if (!empty($item["attach"])) {
 451                                         $item["attach"] .= ',';
 452                                 } else {
 453                                         $item["attach"] = '';
 454                                 }
 455
 456                                 $attachments[] = ["link" => $href, "type" => $type, "length" => $length];
 457
 458                                 $item["attach"] .= '[attach]href="' . $href . '" length="' . $length . '" type="' . $type . '"[/attach]';
 459                         }
 460
 461                         $taglist = [];
 462                         $categories = $xpath->query("category", $entry);
 463                         foreach ($categories AS $category) {
 464                                 $taglist[] = $category->nodeValue;
 465                         }
 466
 467                         $body = trim(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 468
 469                         if (empty($body)) {
 470                                 $body = trim(XML::getFirstNodeValue($xpath, 'content:encoded/text()', $entry));
 471                         }
 472
 473                         $summary = trim(XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry));
 474
 475                         if (empty($summary)) {
 476                                 $summary = trim(XML::getFirstNodeValue($xpath, 'description/text()', $entry));
 477                         }
 478
 479                         if (empty($body)) {
 480                                 $body = $summary;
 481                                 $summary = '';
 482                         }
 483
 484                         if ($body == $summary) {
 485                                 $summary = '';
 486                         }
 487
 488                         // remove the content of the title if it is identically to the body
 489                         // This helps with auto generated titles e.g. from tumblr
 490                         if (self::titleIsBody($item["title"], $body)) {
 491                                 $item["title"] = "";
 492                         }
 493                         $item["body"] = HTML::toBBCode($body, $basepath);
 494
 495                         if (($item["body"] == '') && ($item["title"] != '')) {
 496                                 $item["body"] = $item["title"];
 497                                 $item["title"] = '';
 498                         }
 499
 500                         if ($dryRun) {
 501                                 $items[] = $item;
 502                                 break;
 503                         } elseif (!Item::isValid($item)) {
 504                                 Logger::info('Feed is invalid', ['created' => $item['created'], 'uid' => $item['uid'], 'uri' => $item['uri']]);
 505                                 continue;
 506                         }
 507
 508                         $preview = '';
 509                         if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] < 3)) {
 510                                 // Handle enclosures and treat them as preview picture
 511                                 foreach ($attachments AS $attachment) {
 512                                         if ($attachment["type"] == "image/jpeg") {
 513                                                 $preview = $attachment["link"];
 514                                         }
 515                                 }
 516
 517                                 // Remove a possible link to the item itself
 518                                 $item["body"] = str_replace($item["plink"], '', $item["body"]);
 519                                 $item["body"] = trim(preg_replace('/\[url\=\](\w+.*?)\[\/url\]/i', '', $item["body"]));
 520
 521                                 // Replace the content when the title is longer than the body
 522                                 $replace = (strlen($item["title"]) > strlen($item["body"]));
 523
 524                                 // Replace it, when there is an image in the body
 525                                 if (strstr($item["body"], '[/img]')) {
 526                                         $replace = true;
 527                                 }
 528
 529                                 // Replace it, when there is a link in the body
 530                                 if (strstr($item["body"], '[/url]')) {
 531                                         $replace = true;
 532                                 }
 533
 534                                 if ($replace) {
 535                                         $item["body"] = trim($item["title"]);
 536                                 }
 537
 538                                 $data = ParseUrl::getSiteinfoCached($item['plink'], true);
 539                                 if (!empty($data['text']) && !empty($data['title']) && (mb_strlen($item['body']) < mb_strlen($data['text']))) {
 540                                         // When the fetched page info text is longer than the body, we do try to enhance the body
 541                                         if (!empty($item['body']) && (strpos($data['title'], $item['body']) === false) && (strpos($data['text'], $item['body']) === false)) {
 542                                                 // The body is not part of the fetched page info title or page info text. So we add the text to the body
 543                                                 $item['body'] .= "\n\n" . $data['text'];
 544                                         } else {
 545                                                 // Else we replace the body with the page info text
 546                                                 $item['body'] = $data['text'];
 547                                         }
 548                                 }
 549
 550                                 // We always strip the title since it will be added in the page information
 551                                 $item["title"] = "";
 552                                 $item["body"] = $item["body"] . "\n" . PageInfo::getFooterFromUrl($item["plink"], false, $preview, ($contact["fetch_further_information"] == 2), $contact["ffi_keyword_denylist"] ?? '');
 553                                 $taglist = $contact["fetch_further_information"] == 2 ? PageInfo::getTagsFromUrl($item["plink"], $preview, $contact["ffi_keyword_denylist"] ?? '') : [];
 554                                 $item["object-type"] = Activity\ObjectType::BOOKMARK;
 555                                 unset($item["attach"]);
 556                         } else {
 557                                 if (!empty($summary)) {
 558                                         $item["body"] = '[abstract]' . HTML::toBBCode($summary, $basepath) . "[/abstract]\n" . $item["body"];
 559                                 }
 560
 561                                 if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] == 3)) {
 562                                         if (empty($taglist)) {
 563                                                 $taglist = PageInfo::getTagsFromUrl($item["plink"], $preview, $contact["ffi_keyword_denylist"] ?? '');
 564                                         }
 565                                         $item["body"] .= "\n" . self::tagToString($taglist);
 566                                 } else {
 567                                         $taglist = [];
 568                                 }
 569
 570                                 // Add the link to the original feed entry if not present in feed
 571                                 if (($item['plink'] != '') && !strstr($item["body"], $item['plink'])) {
 572                                         $item["body"] .= "[hr][url]" . $item['plink'] . "[/url]";
 573                                 }
 574                         }
 575
 576                         Logger::info('Stored feed', ['item' => $item]);
 577
 578                         $notify = Item::isRemoteSelf($contact, $item);
 579
 580                         // Distributed items should have a well formatted URI.
 581                         // Additionally we have to avoid conflicts with identical URI between imported feeds and these items.
 582                         if ($notify) {
 583                                 $item['guid'] = Item::guidFromUri($orig_plink, DI::baseUrl()->getHostname());
 584                                 unset($item['uri']);
 585                                 unset($item['parent-uri']);
 586
 587                                 // Set the delivery priority for "remote self" to "medium"
 588                                 $notify = PRIORITY_MEDIUM;
 589                         }
 590
 591                         $id = Item::insert($item, $notify);
 592
 593                         Logger::info("Feed for contact " . $contact["url"] . " stored under id " . $id);
 594
 595                         if (!empty($id) && !empty($taglist)) {
 596                                 $feeditem = Item::selectFirst(['uri-id'], ['id' => $id]);
 597                                 foreach ($taglist as $tag) {
 598                                         Tag::store($feeditem['uri-id'], Tag::HASHTAG, $tag);
 599                                 }
 600                         }
 601                 }
 602
 603                 if (!$dryRun && DI::config()->get('system', 'adjust_poll_frequency')) {
 604                         self::adjustPollFrequency($contact, $creation_dates);
 605                 }
 606
 607                 return ["header" => $author, "items" => $items];
 608         }
 609
 610         /**
 611          * Automatically adjust the poll frequency according to the post frequency
 612          *
 613          * @param array $contact
 614          * @param array $creation_dates
 615          * @return void
 616          */
 617         private static function adjustPollFrequency(array $contact, array $creation_dates)
 618         {
 619                 if ($contact['network'] != Protocol::FEED) {
 620                         Logger::info('Contact is no feed, skip.', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url'], 'network' => $contact['network']]);
 621                         return;
 622                 }
 623
 624                 if (!empty($creation_dates)) {
 625                         // Count the post frequency and the earliest and latest post date
 626                         $frequency = [];
 627                         $oldest = time();
 628                         $newest = 0;
 629                         $oldest_date = $newest_date = '';
 630
 631                         foreach ($creation_dates as $date) {
 632                                 $timestamp = strtotime($date);
 633                                 $day = intdiv($timestamp, 86400);
 634                                 $hour = $timestamp % 86400;
 635
 636                                 // Only have a look at values from the last seven days
 637                                 if (((time() / 86400) - $day) < 7) {
 638                                         if (empty($frequency[$day])) {
 639                                                 $frequency[$day] = ['count' => 1, 'low' => $hour, 'high' => $hour];
 640                                         } else {
 641                                                 ++$frequency[$day]['count'];
 642                                                 if ($frequency[$day]['low'] > $hour) {
 643                                                         $frequency[$day]['low'] = $hour;
 644                                                 }
 645                                                 if ($frequency[$day]['high'] < $hour) {
 646                                                         $frequency[$day]['high'] = $hour;
 647                                                 }
 648                                         }
 649                                 }
 650                                 if ($oldest > $day) {
 651                                         $oldest = $day;
 652                                         $oldest_date = $date;
 653                                 }
 654
 655                                 if ($newest < $day) {
 656                                         $newest = $day;
 657                                         $newest_date = $date;
 658                                 }
 659                         }
 660
 661                         if (count($creation_dates) == 1) {
 662                                 Logger::info('Feed had posted a single time, switching to daily polling', ['newest' => $newest_date, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 663                                 $priority = 8; // Poll once a day
 664                         }
 665
 666                         if (empty($priority) && (((time() / 86400) - $newest) > 730)) {
 667                                 Logger::info('Feed had not posted for two years, switching to monthly polling', ['newest' => $newest_date, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 668                                 $priority = 10; // Poll every month
 669                         }
 670
 671                         if (empty($priority) && (((time() / 86400) - $newest) > 365)) {
 672                                 Logger::info('Feed had not posted for a year, switching to weekly polling', ['newest' => $newest_date, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 673                                 $priority = 9; // Poll every week
 674                         }
 675
 676                         if (empty($priority) && empty($frequency)) {
 677                                 Logger::info('Feed had not posted for at least a week, switching to daily polling', ['newest' => $newest_date, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 678                                 $priority = 8; // Poll once a day
 679                         }
 680
 681                         if (empty($priority)) {
 682                                 // Calculate the highest "posts per day" value
 683                                 $max = 0;
 684                                 foreach ($frequency as $entry) {
 685                                         if (($entry['count'] == 1) || ($entry['high'] == $entry['low'])) {
 686                                                 continue;
 687                                         }
 688
 689                                         // We take the earliest and latest post day and interpolate the number of post per day
 690                                         // that would had been created with this post frequency
 691
 692                                         // Assume at least four hours between oldest and newest post per day - should be okay for news outlets
 693                                         $duration = max($entry['high'] - $entry['low'], 14400);
 694                                         $ppd = (86400 / $duration) * $entry['count'];
 695                                         if ($ppd > $max) {
 696                                                 $max = $ppd;
 697                                         }
 698                                 }
 699                                 if ($max > 48) {
 700                                         $priority = 1; // Poll every quarter hour
 701                                 } elseif ($max > 24) {
 702                                         $priority = 2; // Poll half an hour
 703                                 } elseif ($max > 12) {
 704                                         $priority = 3; // Poll hourly
 705                                 } elseif ($max > 8) {
 706                                         $priority = 4; // Poll every two hours
 707                                 } elseif ($max > 4) {
 708                                         $priority = 5; // Poll every three hours
 709                                 } elseif ($max > 2) {
 710                                         $priority = 6; // Poll every six hours
 711                                 } else {
 712                                         $priority = 7; // Poll twice a day
 713                                 }
 714                                 Logger::info('Calculated priority by the posts per day', ['priority' => $priority, 'max' => round($max, 2), 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 715                         }
 716                 } else {
 717                         Logger::info('No posts, switching to daily polling', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 718                         $priority = 8; // Poll once a day
 719                 }
 720
 721                 if ($contact['rating'] != $priority) {
 722                         Logger::notice('Adjusting priority', ['old' => $contact['rating'], 'new' => $priority, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 723                         DBA::update('contact', ['rating' => $priority], ['id' => $contact['id']]);
 724                 }
 725         }
 726
 727         /**
 728          * Convert a tag array to a tag string
 729          *
 730          * @param array $tags
 731          * @return string tag string
 732          */
 733         private static function tagToString(array $tags)
 734         {
 735                 $tagstr = '';
 736
 737                 foreach ($tags as $tag) {
 738                         if ($tagstr != "") {
 739                                 $tagstr .= ", ";
 740                         }
 741
 742                         $tagstr .= "#[url=" . DI::baseUrl() . "/search?tag=" . urlencode($tag) . "]" . $tag . "[/url]";
 743                 }
 744
 745                 return $tagstr;
 746         }
 747
 748         private static function titleIsBody($title, $body)
 749         {
 750                 $title = strip_tags($title);
 751                 $title = trim($title);
 752                 $title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
 753                 $title = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $title);
 754
 755                 $body = strip_tags($body);
 756                 $body = trim($body);
 757                 $body = html_entity_decode($body, ENT_QUOTES, 'UTF-8');
 758                 $body = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $body);
 759
 760                 if (strlen($title) < strlen($body)) {
 761                         $body = substr($body, 0, strlen($title));
 762                 }
 763
 764                 if (($title != $body) && (substr($title, -3) == "...")) {
 765                         $pos = strrpos($title, "...");
 766                         if ($pos > 0) {
 767                                 $title = substr($title, 0, $pos);
 768                                 $body = substr($body, 0, $pos);
 769                         }
 770                 }
 771                 return ($title == $body);
 772         }
 773
 774         /**
 775          * Creates the Atom feed for a given nickname
 776          *
 777          * Supported filters:
 778          * - activity (default): all the public posts
 779          * - posts: all the public top-level posts
 780          * - comments: all the public replies
 781          *
 782          * Updates the provided last_update parameter if the result comes from the
 783          * cache or it is empty
 784          *
 785          * @param string  $owner_nick  Nickname of the feed owner
 786          * @param string  $last_update Date of the last update
 787          * @param integer $max_items   Number of maximum items to fetch
 788          * @param string  $filter      Feed items filter (activity, posts or comments)
 789          * @param boolean $nocache     Wether to bypass caching
 790          *
 791          * @return string Atom feed
 792          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 793          * @throws \ImagickException
 794          */
 795         public static function atom($owner_nick, $last_update, $max_items = 300, $filter = 'activity', $nocache = false)
 796         {
 797                 $stamp = microtime(true);
 798
 799                 $owner = User::getOwnerDataByNick($owner_nick);
 800                 if (!$owner) {
 801                         return;
 802                 }
 803
 804                 $cachekey = "feed:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
 805
 806                 $previous_created = $last_update;
 807
 808                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
 809                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
 810                         $result = DI::cache()->get($cachekey);
 811                         if (!$nocache && !is_null($result)) {
 812                                 Logger::info('Cached feed duration', ['seconds' => number_format(microtime(true) - $stamp, 3), 'nick' => $owner_nick, 'filter' => $filter, 'created' => $previous_created]);
 813                                 return $result['feed'];
 814                         }
 815                 }
 816
 817                 $check_date = empty($last_update) ? '' : DateTimeFormat::utc($last_update);
 818                 $authorid = Contact::getIdForURL($owner["url"]);
 819
 820                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted` AND `gravity` IN (?, ?)
 821                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?, ?, ?)",
 822                         $owner["uid"], $check_date, GRAVITY_PARENT, GRAVITY_COMMENT,
 823                         Item::PRIVATE, Protocol::ACTIVITYPUB,
 824                         Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA];
 825
 826                 if ($filter === 'comments') {
 827                         $condition[0] .= " AND `object-type` = ? ";
 828                         $condition[] = Activity\ObjectType::COMMENT;
 829                 }
 830
 831                 if ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
 832                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
 833                         $condition[] = $owner["id"];
 834                         $condition[] = $authorid;
 835                 }
 836
 837                 $params = ['order' => ['received' => true], 'limit' => $max_items];
 838
 839                 if ($filter === 'posts') {
 840                         $ret = Item::selectThread([], $condition, $params);
 841                 } else {
 842                         $ret = Item::select([], $condition, $params);
 843                 }
 844
 845                 $items = Item::inArray($ret);
 846
 847                 $doc = new DOMDocument('1.0', 'utf-8');
 848                 $doc->formatOutput = true;
 849
 850                 $root = self::addHeader($doc, $owner, $filter);
 851
 852                 foreach ($items as $item) {
 853                         $entry = self::entry($doc, $item, $owner);
 854                         $root->appendChild($entry);
 855
 856                         if ($last_update < $item['created']) {
 857                                 $last_update = $item['created'];
 858                         }
 859                 }
 860
 861                 $feeddata = trim($doc->saveXML());
 862
 863                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
 864                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
 865
 866                 Logger::info('Feed duration', ['seconds' => number_format(microtime(true) - $stamp, 3), 'nick' => $owner_nick, 'filter' => $filter, 'created' => $previous_created]);
 867
 868                 return $feeddata;
 869         }
 870
 871         /**
 872          * Adds the header elements to the XML document
 873          *
 874          * @param DOMDocument $doc       XML document
 875          * @param array       $owner     Contact data of the poster
 876          * @param string      $filter    The related feed filter (activity, posts or comments)
 877          *
 878          * @return object header root element
 879          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 880          */
 881         private static function addHeader(DOMDocument $doc, array $owner, $filter)
 882         {
 883                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
 884                 $doc->appendChild($root);
 885
 886                 $title = '';
 887                 $selfUri = '/feed/' . $owner["nick"] . '/';
 888                 switch ($filter) {
 889                         case 'activity':
 890                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
 891                                 $selfUri .= $filter;
 892                                 break;
 893                         case 'posts':
 894                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
 895                                 break;
 896                         case 'comments':
 897                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
 898                                 $selfUri .= $filter;
 899                                 break;
 900                 }
 901
 902                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
 903                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 904                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
 905                 XML::addElement($doc, $root, "title", $title);
 906                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
 907                 XML::addElement($doc, $root, "logo", $owner["photo"]);
 908                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
 909
 910                 $author = self::addAuthor($doc, $owner);
 911                 $root->appendChild($author);
 912
 913                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
 914                 XML::addElement($doc, $root, "link", "", $attributes);
 915
 916                 OStatus::hublinks($doc, $root, $owner["nick"]);
 917
 918                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
 919                 XML::addElement($doc, $root, "link", "", $attributes);
 920
 921                 return $root;
 922         }
 923
 924         /**
 925          * Adds the author element to the XML document
 926          *
 927          * @param DOMDocument $doc          XML document
 928          * @param array       $owner        Contact data of the poster
 929          *
 930          * @return \DOMElement author element
 931          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 932          */
 933         private static function addAuthor(DOMDocument $doc, array $owner)
 934         {
 935                 $author = $doc->createElement("author");
 936                 XML::addElement($doc, $author, "uri", $owner["url"]);
 937                 XML::addElement($doc, $author, "name", $owner["nick"]);
 938                 XML::addElement($doc, $author, "email", $owner["addr"]);
 939
 940                 return $author;
 941         }
 942
 943         /**
 944          * Adds an entry element to the XML document
 945          *
 946          * @param DOMDocument $doc       XML document
 947          * @param array       $item      Data of the item that is to be posted
 948          * @param array       $owner     Contact data of the poster
 949          * @param bool        $toplevel  optional default false
 950          *
 951          * @return \DOMElement Entry element
 952          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 953          * @throws \ImagickException
 954          */
 955         private static function entry(DOMDocument $doc, array $item, array $owner)
 956         {
 957                 $xml = null;
 958
 959                 $repeated_guid = OStatus::getResharedGuid($item);
 960                 if ($repeated_guid != "") {
 961                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid);
 962                 }
 963
 964                 if ($xml) {
 965                         return $xml;
 966                 }
 967
 968                 return self::noteEntry($doc, $item, $owner);
 969         }
 970
 971                 /**
 972          * Adds an entry element with reshared content
 973          *
 974          * @param DOMDocument $doc           XML document
 975          * @param array       $item          Data of the item that is to be posted
 976          * @param array       $owner         Contact data of the poster
 977          * @param string      $repeated_guid guid
 978          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
 979          *
 980          * @return bool Entry element
 981          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 982          * @throws \ImagickException
 983          */
 984         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid)
 985         {
 986                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
 987                         Logger::info('Feed entry author does not match feed owner', ['owner' => $owner["url"], 'author' => $item["author-link"]]);
 988                 }
 989
 990                 $entry = OStatus::entryHeader($doc, $owner, $item, false);
 991
 992                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
 993                         'network' => Protocol::FEDERATED];
 994                 $repeated_item = Item::selectFirst([], $condition);
 995                 if (!DBA::isResult($repeated_item)) {
 996                         return false;
 997                 }
 998
 999                 self::entryContent($doc, $entry, $item, self::getTitle($repeated_item), Activity::SHARE, false);
1000
1001                 self::entryFooter($doc, $entry, $item, $owner);
1002
1003                 return $entry;
1004         }
1005
1006         /**
1007          * Adds a regular entry element
1008          *
1009          * @param DOMDocument $doc       XML document
1010          * @param array       $item      Data of the item that is to be posted
1011          * @param array       $owner     Contact data of the poster
1012          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1013          *
1014          * @return \DOMElement Entry element
1015          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1016          * @throws \ImagickException
1017          */
1018         private static function noteEntry(DOMDocument $doc, array $item, array $owner)
1019         {
1020                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1021                         Logger::info('Feed entry author does not match feed owner', ['owner' => $owner["url"], 'author' => $item["author-link"]]);
1022                 }
1023
1024                 $entry = OStatus::entryHeader($doc, $owner, $item, false);
1025
1026                 self::entryContent($doc, $entry, $item, self::getTitle($item), '', true);
1027
1028                 self::entryFooter($doc, $entry, $item, $owner);
1029
1030                 return $entry;
1031         }
1032
1033         /**
1034          * Adds elements to the XML document
1035          *
1036          * @param DOMDocument $doc       XML document
1037          * @param \DOMElement $entry     Entry element where the content is added
1038          * @param array       $item      Data of the item that is to be posted
1039          * @param array       $owner     Contact data of the poster
1040          * @param string      $title     Title for the post
1041          * @param string      $verb      The activity verb
1042          * @param bool        $complete  Add the "status_net" element?
1043          * @param bool        $feed_mode Behave like a regular feed for users if true
1044          * @return void
1045          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1046          */
1047         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, $title, $verb = "", $complete = true)
1048         {
1049                 if ($verb == "") {
1050                         $verb = OStatus::constructVerb($item);
1051                 }
1052
1053                 XML::addElement($doc, $entry, "id", $item["uri"]);
1054                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1055
1056                 $body = OStatus::formatPicturePost($item['body']);
1057
1058                 $body = BBCode::convert($body, false, BBCode::OSTATUS);
1059
1060                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1061
1062                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1063                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
1064                 );
1065
1066                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1067                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1068         }
1069
1070         /**
1071          * Adds the elements at the foot of an entry to the XML document
1072          *
1073          * @param DOMDocument $doc       XML document
1074          * @param object      $entry     The entry element where the elements are added
1075          * @param array       $item      Data of the item that is to be posted
1076          * @param array       $owner     Contact data of the poster
1077          * @param bool        $complete  default true
1078          * @return void
1079          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1080          */
1081         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner)
1082         {
1083                 $mentioned = [];
1084
1085                 if ($item['gravity'] != GRAVITY_PARENT) {
1086                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1087                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
1088
1089                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $parent_item]);
1090
1091                         if (DBA::isResult($thrparent)) {
1092                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
1093                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
1094                                 $parent_plink = $thrparent["plink"];
1095                         } else {
1096                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
1097                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
1098                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
1099                         }
1100
1101                         $attributes = [
1102                                         "ref" => $parent_item,
1103                                         "href" => $parent_plink];
1104                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1105
1106                         $attributes = [
1107                                         "rel" => "related",
1108                                         "href" => $parent_plink];
1109                         XML::addElement($doc, $entry, "link", "", $attributes);
1110                 }
1111
1112                 // uri-id isn't present for follow entry pseudo-items
1113                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
1114                 foreach ($tags as $tag) {
1115                         $mentioned[$tag['url']] = $tag['url'];
1116                 }
1117
1118                 foreach ($tags as $tag) {
1119                         if ($tag['type'] == Tag::HASHTAG) {
1120                                 XML::addElement($doc, $entry, "category", "", ["term" => $tag['name']]);
1121                         }
1122                 }
1123
1124                 OStatus::getAttachment($doc, $entry, $item);
1125         }
1126
1127         /**
1128          * Fetch or create title for feed entry
1129          *
1130          * @param array $item
1131          * @return string title
1132          */
1133         private static function getTitle(array $item)
1134         {
1135                 if ($item['title'] != '') {
1136                         return BBCode::convert($item['title'], false, BBCode::OSTATUS);
1137                 }
1138
1139                 // Fetch information about the post
1140                 $siteinfo = BBCode::getAttachedData($item["body"]);
1141                 if (isset($siteinfo["title"])) {
1142                         return $siteinfo["title"];
1143                 }
1144
1145                 // If no bookmark is found then take the first line
1146                 // Remove the share element before fetching the first line
1147                 $title = trim(preg_replace("/\[share.*?\](.*?)\[\/share\]/ism","\n$1\n",$item['body']));
1148
1149                 $title = HTML::toPlaintext(BBCode::convert($title, false), 0, true)."\n";
1150                 $pos = strpos($title, "\n");
1151                 $trailer = "";
1152                 if (($pos == 0) || ($pos > 100)) {
1153                         $pos = 100;
1154                         $trailer = "...";
1155                 }
1156
1157                 return substr($title, 0, $pos) . $trailer;
1158         }
1159 }