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\Conversation;
  36 use Friendica\Model\Item;
  37 use Friendica\Model\Post;
  38 use Friendica\Model\Tag;
  39 use Friendica\Model\User;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\ParseUrl;
  43 use Friendica\Util\Strings;
  44 use Friendica\Util\XML;
  45
  46 /**
  47  * This class contain functions to import feeds (RSS/RDF/Atom)
  48  */
  49 class Feed
  50 {
  51         /**
  52          * consume - process atom feed and update anything/everything we might need to update
  53          *
  54          * $xml = the (atom) feed to consume - RSS isn't as fully supported but may work for simple feeds.
  55          *
  56          * $importer = the contact_record (joined to user_record) of the local user who owns this relationship.
  57          *             It is this person's stuff that is going to be updated.
  58          * $contact =  the person who is sending us stuff. If not set, we MAY be processing a "follow" activity
  59          *             from an external network and MAY create an appropriate contact record. Otherwise, we MUST
  60          *             have a contact record.
  61          * $hub = should we find a hub declation in the feed, pass it back to our calling process, who might (or
  62          *        might not) try and subscribe to it.
  63          * $datedir sorts in reverse order
  64          * $pass - by default ($pass = 0) we cannot guarantee that a parent item has been
  65          *      imported prior to its children being seen in the stream unless we are certain
  66          *      of how the feed is arranged/ordered.
  67          * With $pass = 1, we only pull parent items out of the stream.
  68          * With $pass = 2, we only pull children (comments/likes).
  69          *
  70          * So running this twice, first with pass 1 and then with pass 2 will do the right
  71          * thing regardless of feed ordering. This won't be adequate in a fully-threaded
  72          * model where comments can have sub-threads. That would require some massive sorting
  73          * to get all the feed items into a mostly linear ordering, and might still require
  74          * recursion.
  75          *
  76          * @param       $xml
  77          * @param array $importer
  78          * @param array $contact
  79          * @param       $hub
  80          * @throws ImagickException
  81          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  82          */
  83         public static function consume($xml, array $importer, array $contact, &$hub)
  84         {
  85                 if ($contact['network'] === Protocol::OSTATUS) {
  86                         Logger::info('Consume OStatus messages');
  87                         OStatus::import($xml, $importer, $contact, $hub);
  88
  89                         return;
  90                 }
  91
  92                 if ($contact['network'] === Protocol::FEED) {
  93                         Logger::info('Consume feeds');
  94                         self::import($xml, $importer, $contact);
  95
  96                         return;
  97                 }
  98
  99                 if ($contact['network'] === Protocol::DFRN) {
 100                         Logger::info('Consume DFRN messages');
 101                         $dfrn_importer = DFRN::getImporter($contact['id'], $importer['uid']);
 102                         if (!empty($dfrn_importer)) {
 103                                 Logger::info('Now import the DFRN feed');
 104                                 DFRN::import($xml, $dfrn_importer, true, Conversation::PARCEL_LEGACY_DFRN);
 105                                 return;
 106                         }
 107                 }
 108         }
 109
 110         /**
 111          * Read a RSS/RDF/Atom feed and create an item entry for it
 112          *
 113          * @param string $xml      The feed data
 114          * @param array  $importer The user record of the importer
 115          * @param array  $contact  The contact record of the feed
 116          *
 117          * @return array Returns the header and the first item in dry run mode
 118          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 119          */
 120         public static function import($xml, array $importer = [], array $contact = [])
 121         {
 122                 $dryRun = empty($importer) && empty($contact);
 123
 124                 if ($dryRun) {
 125                         Logger::info("Test Atom/RSS feed");
 126                 } else {
 127                         Logger::info("Import Atom/RSS feed '" . $contact["name"] . "' (Contact " . $contact["id"] . ") for user " . $importer["uid"]);
 128                 }
 129
 130                 if (empty($xml)) {
 131                         Logger::info('XML is empty.');
 132                         return [];
 133                 }
 134
 135                 if (!empty($contact['poll'])) {
 136                         $basepath = $contact['poll'];
 137                 } elseif (!empty($contact['url'])) {
 138                         $basepath = $contact['url'];
 139                 } else {
 140                         $basepath = '';
 141                 }
 142
 143                 $doc = new DOMDocument();
 144                 @$doc->loadXML(trim($xml));
 145                 $xpath = new DOMXPath($doc);
 146                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 147                 $xpath->registerNamespace('dc', "http://purl.org/dc/elements/1.1/");
 148                 $xpath->registerNamespace('content', "http://purl.org/rss/1.0/modules/content/");
 149                 $xpath->registerNamespace('rdf', "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
 150                 $xpath->registerNamespace('rss', "http://purl.org/rss/1.0/");
 151                 $xpath->registerNamespace('media', "http://search.yahoo.com/mrss/");
 152                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 153
 154                 $author = [];
 155                 $entries = null;
 156
 157                 // Is it RDF?
 158                 if ($xpath->query('/rdf:RDF/rss:channel')->length > 0) {
 159                         $author["author-link"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:link/text()');
 160                         $author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:title/text()');
 161
 162                         if (empty($author["author-name"])) {
 163                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:description/text()');
 164                         }
 165                         $entries = $xpath->query('/rdf:RDF/rss:item');
 166                 }
 167
 168                 // Is it Atom?
 169                 if ($xpath->query('/atom:feed')->length > 0) {
 170                         $alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']");
 171                         if (is_object($alternate)) {
 172                                 foreach ($alternate AS $attribute) {
 173                                         if ($attribute->name == "href") {
 174                                                 $author["author-link"] = $attribute->textContent;
 175                                         }
 176                                 }
 177                         }
 178
 179                         if (empty($author["author-link"])) {
 180                                 $self = XML::getFirstAttributes($xpath, "atom:link[@rel='self']");
 181                                 if (is_object($self)) {
 182                                         foreach ($self AS $attribute) {
 183                                                 if ($attribute->name == "href") {
 184                                                         $author["author-link"] = $attribute->textContent;
 185                                                 }
 186                                         }
 187                                 }
 188                         }
 189
 190                         if (empty($author["author-link"])) {
 191                                 $author["author-link"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:id/text()');
 192                         }
 193                         $author["author-avatar"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:logo/text()');
 194
 195                         $author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:title/text()');
 196
 197                         if (empty($author["author-name"])) {
 198                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:subtitle/text()');
 199                         }
 200
 201                         if (empty($author["author-name"])) {
 202                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:name/text()');
 203                         }
 204
 205                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()');
 206                         if ($value != "") {
 207                                 $author["author-name"] = $value;
 208                         }
 209
 210                         if ($dryRun) {
 211                                 $author["author-id"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:id/text()');
 212
 213                                 // See https://tools.ietf.org/html/rfc4287#section-3.2.2
 214                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()');
 215                                 if ($value != "") {
 216                                         $author["author-link"] = $value;
 217                                 }
 218
 219                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()');
 220                                 if ($value != "") {
 221                                         $author["author-nick"] = $value;
 222                                 }
 223
 224                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()');
 225                                 if ($value != "") {
 226                                         $author["author-location"] = $value;
 227                                 }
 228
 229                                 $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()');
 230                                 if ($value != "") {
 231                                         $author["author-about"] = $value;
 232                                 }
 233
 234                                 $avatar = XML::getFirstAttributes($xpath, "atom:author/atom:link[@rel='avatar']");
 235                                 if (is_object($avatar)) {
 236                                         foreach ($avatar AS $attribute) {
 237                                                 if ($attribute->name == "href") {
 238                                                         $author["author-avatar"] = $attribute->textContent;
 239                                                 }
 240                                         }
 241                                 }
 242                         }
 243
 244                         $author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:updated/text()');
 245
 246                         $author["app"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:generator/text()');
 247
 248                         $entries = $xpath->query('/atom:feed/atom:entry');
 249                 }
 250
 251                 // Is it RSS?
 252                 if ($xpath->query('/rss/channel')->length > 0) {
 253                         $author["author-link"] = XML::getFirstNodeValue($xpath, '/rss/channel/link/text()');
 254
 255                         $author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/title/text()');
 256                         $author["author-avatar"] = XML::getFirstNodeValue($xpath, '/rss/channel/image/url/text()');
 257
 258                         if (empty($author["author-name"])) {
 259                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/copyright/text()');
 260                         }
 261
 262                         if (empty($author["author-name"])) {
 263                                 $author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/description/text()');
 264                         }
 265
 266                         $author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/rss/channel/pubDate/text()');
 267
 268                         $author["app"] = XML::getFirstNodeValue($xpath, '/rss/channel/generator/text()');
 269
 270                         $entries = $xpath->query('/rss/channel/item');
 271                 }
 272
 273                 if (!$dryRun) {
 274                         $author["author-link"] = $contact["url"];
 275
 276                         if (empty($author["author-name"])) {
 277                                 $author["author-name"] = $contact["name"];
 278                         }
 279
 280                         $author["author-avatar"] = $contact["thumb"];
 281
 282                         $author["owner-link"] = $contact["url"];
 283                         $author["owner-name"] = $contact["name"];
 284                         $author["owner-avatar"] = $contact["thumb"];
 285                 }
 286
 287                 $header = [];
 288                 $header["uid"] = $importer["uid"] ?? 0;
 289                 $header["network"] = Protocol::FEED;
 290                 $header["wall"] = 0;
 291                 $header["origin"] = 0;
 292                 $header["gravity"] = GRAVITY_PARENT;
 293                 $header["private"] = Item::PUBLIC;
 294                 $header["verb"] = Activity::POST;
 295                 $header["object-type"] = Activity\ObjectType::NOTE;
 296
 297                 $header["contact-id"] = $contact["id"] ?? 0;
 298
 299                 if (!is_object($entries)) {
 300                         Logger::info("There are no entries in this feed.");
 301                         return [];
 302                 }
 303
 304                 $items = [];
 305                 $creation_dates = [];
 306
 307                 // Limit the number of items that are about to be fetched
 308                 $total_items = ($entries->length - 1);
 309                 $max_items = DI::config()->get('system', 'max_feed_items');
 310                 if (($max_items > 0) && ($total_items > $max_items)) {
 311                         $total_items = $max_items;
 312                 }
 313
 314                 $postings = [];
 315
 316                 // Importing older entries first
 317                 for ($i = $total_items; $i >= 0; --$i) {
 318                         $entry = $entries->item($i);
 319
 320                         $item = array_merge($header, $author);
 321
 322                         $alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']", $entry);
 323                         if (!is_object($alternate)) {
 324                                 $alternate = XML::getFirstAttributes($xpath, "atom:link", $entry);
 325                         }
 326                         if (is_object($alternate)) {
 327                                 foreach ($alternate AS $attribute) {
 328                                         if ($attribute->name == "href") {
 329                                                 $item["plink"] = $attribute->textContent;
 330                                         }
 331                                 }
 332                         }
 333
 334                         if (empty($item["plink"])) {
 335                                 $item["plink"] = XML::getFirstNodeValue($xpath, 'link/text()', $entry);
 336                         }
 337
 338                         if (empty($item["plink"])) {
 339                                 $item["plink"] = XML::getFirstNodeValue($xpath, 'rss:link/text()', $entry);
 340                         }
 341
 342                         $item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 343
 344                         if (empty($item["uri"])) {
 345                                 $item["uri"] = XML::getFirstNodeValue($xpath, 'guid/text()', $entry);
 346                         }
 347
 348                         if (empty($item["uri"])) {
 349                                 $item["uri"] = $item["plink"];
 350                         }
 351
 352                         // Add the base path if missing
 353                         $item["uri"] = Network::addBasePath($item["uri"], $basepath);
 354                         $item["plink"] = Network::addBasePath($item["plink"], $basepath);
 355
 356                         $orig_plink = $item["plink"];
 357
 358                         $item["plink"] = DI::httpRequest()->finalUrl($item["plink"]);
 359
 360                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 361
 362                         if (empty($item["title"])) {
 363                                 $item["title"] = XML::getFirstNodeValue($xpath, 'title/text()', $entry);
 364                         }
 365                         if (empty($item["title"])) {
 366                                 $item["title"] = XML::getFirstNodeValue($xpath, 'rss:title/text()', $entry);
 367                         }
 368
 369                         $item["title"] = html_entity_decode($item["title"], ENT_QUOTES, 'UTF-8');
 370
 371                         $published = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 372
 373                         if (empty($published)) {
 374                                 $published = XML::getFirstNodeValue($xpath, 'pubDate/text()', $entry);
 375                         }
 376
 377                         if (empty($published)) {
 378                                 $published = XML::getFirstNodeValue($xpath, 'dc:date/text()', $entry);
 379                         }
 380
 381                         $updated = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 382
 383                         if (empty($updated) && !empty($published)) {
 384                                 $updated = $published;
 385                         }
 386
 387                         if (empty($published) && !empty($updated)) {
 388                                 $published = $updated;
 389                         }
 390
 391                         if ($published != "") {
 392                                 $item["created"] = $published;
 393                         }
 394
 395                         if ($updated != "") {
 396                                 $item["edited"] = $updated;
 397                         }
 398
 399                         if (!$dryRun) {
 400                                 $condition = ["`uid` = ? AND `uri` = ? AND `network` IN (?, ?)",
 401                                         $importer["uid"], $item["uri"], Protocol::FEED, Protocol::DFRN];
 402                                 $previous = Item::selectFirst(['id', 'created'], $condition);
 403                                 if (DBA::isResult($previous)) {
 404                                         // Use the creation date when the post had been stored. It can happen this date changes in the feed.
 405                                         $creation_dates[] = $previous['created'];
 406                                         Logger::info("Item with uri " . $item["uri"] . " for user " . $importer["uid"] . " already existed under id " . $previous["id"]);
 407                                         continue;
 408                                 }
 409                                 $creation_dates[] = DateTimeFormat::utc($item['created']);
 410                         }
 411
 412                         $creator = XML::getFirstNodeValue($xpath, 'author/text()', $entry);
 413
 414                         if (empty($creator)) {
 415                                 $creator = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $entry);
 416                         }
 417
 418                         if (empty($creator)) {
 419                                 $creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
 420                         }
 421
 422                         if ($creator != "") {
 423                                 $item["author-name"] = $creator;
 424                         }
 425
 426                         $creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
 427
 428                         if ($creator != "") {
 429                                 $item["author-name"] = $creator;
 430                         }
 431
 432                         /// @TODO ?
 433                         // <category>Ausland</category>
 434                         // <media:thumbnail width="152" height="76" url="http://www.taz.de/picture/667875/192/14388767.jpg"/>
 435
 436                         $attachments = [];
 437
 438                         $enclosures = $xpath->query("enclosure|atom:link[@rel='enclosure']", $entry);
 439                         foreach ($enclosures AS $enclosure) {
 440                                 $href = "";
 441                                 $length = null;
 442                                 $type = null;
 443
 444                                 foreach ($enclosure->attributes AS $attribute) {
 445                                         if (in_array($attribute->name, ["url", "href"])) {
 446                                                 $href = $attribute->textContent;
 447                                         } elseif ($attribute->name == "length") {
 448                                                 $length = (int)$attribute->textContent;
 449                                         } elseif ($attribute->name == "type") {
 450                                                 $type = $attribute->textContent;
 451                                         }
 452                                 }
 453
 454                                 if (!empty($href)) {
 455                                         $attachments[] = ['type' => Post\Media::DOCUMENT, 'url' => $href, 'mimetype' => $type, 'size' => $length];
 456                                 }
 457                         }
 458
 459                         $taglist = [];
 460                         $categories = $xpath->query("category", $entry);
 461                         foreach ($categories AS $category) {
 462                                 $taglist[] = $category->nodeValue;
 463                         }
 464
 465                         $body = trim(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 466
 467                         if (empty($body)) {
 468                                 $body = trim(XML::getFirstNodeValue($xpath, 'content:encoded/text()', $entry));
 469                         }
 470
 471                         $summary = trim(XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry));
 472
 473                         if (empty($summary)) {
 474                                 $summary = trim(XML::getFirstNodeValue($xpath, 'description/text()', $entry));
 475                         }
 476
 477                         if (empty($body)) {
 478                                 $body = $summary;
 479                                 $summary = '';
 480                         }
 481
 482                         if ($body == $summary) {
 483                                 $summary = '';
 484                         }
 485
 486                         // remove the content of the title if it is identically to the body
 487                         // This helps with auto generated titles e.g. from tumblr
 488                         if (self::titleIsBody($item["title"], $body)) {
 489                                 $item["title"] = "";
 490                         }
 491                         $item["body"] = HTML::toBBCode($body, $basepath);
 492
 493                         // Remove tracking pixels
 494                         $item["body"] = preg_replace("/\[img=1x1\]([^\[\]]*)\[\/img\]/Usi", '', $item["body"]);
 495
 496                         if (($item["body"] == '') && ($item["title"] != '')) {
 497                                 $item["body"] = $item["title"];
 498                                 $item["title"] = '';
 499                         }
 500
 501                         if ($dryRun) {
 502                                 $items[] = $item;
 503                                 break;
 504                         } elseif (!Item::isValid($item)) {
 505                                 Logger::info('Feed is invalid', ['created' => $item['created'], 'uid' => $item['uid'], 'uri' => $item['uri']]);
 506                                 continue;
 507                         }
 508
 509                         $preview = '';
 510                         if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] < 3)) {
 511                                 // Handle enclosures and treat them as preview picture
 512                                 foreach ($attachments AS $attachment) {
 513                                         if ($attachment["mimetype"] == "image/jpeg") {
 514                                                 $preview = $attachment["url"];
 515                                         }
 516                                 }
 517
 518                                 // Remove a possible link to the item itself
 519                                 $item["body"] = str_replace($item["plink"], '', $item["body"]);
 520                                 $item["body"] = trim(preg_replace('/\[url\=\](\w+.*?)\[\/url\]/i', '', $item["body"]));
 521
 522                                 // Replace the content when the title is longer than the body
 523                                 $replace = (strlen($item["title"]) > strlen($item["body"]));
 524
 525                                 // Replace it, when there is an image in the body
 526                                 if (strstr($item["body"], '[/img]')) {
 527                                         $replace = true;
 528                                 }
 529
 530                                 // Replace it, when there is a link in the body
 531                                 if (strstr($item["body"], '[/url]')) {
 532                                         $replace = true;
 533                                 }
 534
 535                                 $saved_body = $item["body"];
 536                                 $saved_title = $item["title"];
 537
 538                                 if ($replace) {
 539                                         $item["body"] = trim($item["title"]);
 540                                 }
 541
 542                                 $data = ParseUrl::getSiteinfoCached($item['plink'], true);
 543                                 if (!empty($data['text']) && !empty($data['title']) && (mb_strlen($item['body']) < mb_strlen($data['text']))) {
 544                                         // When the fetched page info text is longer than the body, we do try to enhance the body
 545                                         if (!empty($item['body']) && (strpos($data['title'], $item['body']) === false) && (strpos($data['text'], $item['body']) === false)) {
 546                                                 // The body is not part of the fetched page info title or page info text. So we add the text to the body
 547                                                 $item['body'] .= "\n\n" . $data['text'];
 548                                         } else {
 549                                                 // Else we replace the body with the page info text
 550                                                 $item['body'] = $data['text'];
 551                                         }
 552                                 }
 553
 554                                 $data = PageInfo::queryUrl($item["plink"], false, $preview, ($contact["fetch_further_information"] == 2), $contact["ffi_keyword_denylist"] ?? '');
 555
 556                                 if (!empty($data)) {
 557                                         // Take the data that was provided by the feed if the query is empty
 558                                         if (($data['type'] == 'link') && empty($data['title']) && empty($data['text'])) {
 559                                                 $data['title'] = $saved_title;
 560                                                 $item["body"] = $saved_body;
 561                                         }
 562
 563                                         $data_text = strip_tags(trim($data['text'] ?? ''));
 564                                         $item_body = strip_tags(trim($item['body'] ?? ''));
 565
 566                                         if (!empty($data_text) && (($data_text == $item_body) || strstr($item_body, $data_text))) {
 567                                                 $data['text'] = '';
 568                                         }
 569
 570                                         // We always strip the title since it will be added in the page information
 571                                         $item["title"] = "";
 572                                         $item["body"] = $item["body"] . "\n" . PageInfo::getFooterFromData($data, false);
 573                                         $taglist = $contact["fetch_further_information"] == 2 ? PageInfo::getTagsFromUrl($item["plink"], $preview, $contact["ffi_keyword_denylist"] ?? '') : [];
 574                                         $item["object-type"] = Activity\ObjectType::BOOKMARK;
 575                                         $attachments = [];
 576                                 }
 577                         } else {
 578                                 if (!empty($summary)) {
 579                                         $item["body"] = '[abstract]' . HTML::toBBCode($summary, $basepath) . "[/abstract]\n" . $item["body"];
 580                                 }
 581
 582                                 if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] == 3)) {
 583                                         if (empty($taglist)) {
 584                                                 $taglist = PageInfo::getTagsFromUrl($item["plink"], $preview, $contact["ffi_keyword_denylist"] ?? '');
 585                                         }
 586                                         $item["body"] .= "\n" . self::tagToString($taglist);
 587                                 } else {
 588                                         $taglist = [];
 589                                 }
 590
 591                                 // Add the link to the original feed entry if not present in feed
 592                                 if (($item['plink'] != '') && !strstr($item["body"], $item['plink'])) {
 593                                         $item["body"] .= "[hr][url]" . $item['plink'] . "[/url]";
 594                                 }
 595                         }
 596
 597                         Logger::info('Stored feed', ['item' => $item]);
 598
 599                         $notify = Item::isRemoteSelf($contact, $item);
 600
 601                         // Distributed items should have a well formatted URI.
 602                         // Additionally we have to avoid conflicts with identical URI between imported feeds and these items.
 603                         if ($notify) {
 604                                 $item['guid'] = Item::guidFromUri($orig_plink, DI::baseUrl()->getHostname());
 605                                 unset($item['uri']);
 606                                 unset($item['thr-parent']);
 607                                 unset($item['parent-uri']);
 608
 609                                 // Set the delivery priority for "remote self" to "medium"
 610                                 $notify = PRIORITY_MEDIUM;
 611                         }
 612
 613                         $postings[] = ['item' => $item, 'notify' => $notify,
 614                                 'taglist' => $taglist, 'attachments' => $attachments];
 615                 }
 616
 617                 if (!empty($postings)) {
 618                         $total = count($postings);
 619                         if ($total > 1) {
 620                                 // Posts shouldn't be delayed more than a day
 621                                 $interval = max(1440, self::getPollInterval($contact));
 622                                 $delay = round(($interval * 60) / $total);
 623                                 Logger::notice('Got posting delay', ['delay' => $delay, 'interval' => $interval, 'items' => $total, 'cid' => $contact['id'], 'url' => $contact['url']]);
 624                         } else {
 625                                 $delay = 0;
 626                         }
 627
 628                         $post_delay = 0;
 629
 630                         foreach ($postings as $posting) {
 631                                 if ($delay > 0) {
 632                                         $publish_at = DateTimeFormat::utc('now + ' . $post_delay . ' minute');
 633                                         Logger::notice('Got publishing date', ['delay' => $delay, 'publish_at' => $publish_at, 'cid' => $contact['id'], 'url' => $contact['url']]);
 634                                         $post_delay += $delay;
 635                                 }
 636
 637                                 $id = Item::insert($posting['item'], $posting['notify']);
 638
 639                                 Logger::notice("Feed for contact " . $contact["url"] . " stored under id " . $id);
 640
 641                                 if (!empty($id) && (!empty($posting['taglist']) || !empty($posting['attachments']))) {
 642                                         $feeditem = Item::selectFirst(['uri-id'], ['id' => $id]);
 643                                         foreach ($posting['taglist'] as $tag) {
 644                                                 Tag::store($feeditem['uri-id'], Tag::HASHTAG, $tag);
 645                                         }
 646                                         foreach ($posting['attachments'] as $attachment) {
 647                                                 $attachment['uri-id'] = $feeditem['uri-id'];
 648                                                 Post\Media::insert($attachment);
 649                                         }
 650                                 }
 651                         }
 652                 }
 653
 654                 if (!$dryRun && DI::config()->get('system', 'adjust_poll_frequency')) {
 655                         self::adjustPollFrequency($contact, $creation_dates);
 656                 }
 657
 658                 return ["header" => $author, "items" => $items];
 659         }
 660
 661         /**
 662          * Automatically adjust the poll frequency according to the post frequency
 663          *
 664          * @param array $contact
 665          * @param array $creation_dates
 666          * @return void
 667          */
 668         private static function adjustPollFrequency(array $contact, array $creation_dates)
 669         {
 670                 if ($contact['network'] != Protocol::FEED) {
 671                         Logger::info('Contact is no feed, skip.', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url'], 'network' => $contact['network']]);
 672                         return;
 673                 }
 674
 675                 if (!empty($creation_dates)) {
 676                         // Count the post frequency and the earliest and latest post date
 677                         $frequency = [];
 678                         $oldest = time();
 679                         $newest = 0;
 680                         $oldest_date = $newest_date = '';
 681
 682                         foreach ($creation_dates as $date) {
 683                                 $timestamp = strtotime($date);
 684                                 $day = intdiv($timestamp, 86400);
 685                                 $hour = $timestamp % 86400;
 686
 687                                 // Only have a look at values from the last seven days
 688                                 if (((time() / 86400) - $day) < 7) {
 689                                         if (empty($frequency[$day])) {
 690                                                 $frequency[$day] = ['count' => 1, 'low' => $hour, 'high' => $hour];
 691                                         } else {
 692                                                 ++$frequency[$day]['count'];
 693                                                 if ($frequency[$day]['low'] > $hour) {
 694                                                         $frequency[$day]['low'] = $hour;
 695                                                 }
 696                                                 if ($frequency[$day]['high'] < $hour) {
 697                                                         $frequency[$day]['high'] = $hour;
 698                                                 }
 699                                         }
 700                                 }
 701                                 if ($oldest > $day) {
 702                                         $oldest = $day;
 703                                         $oldest_date = $date;
 704                                 }
 705
 706                                 if ($newest < $day) {
 707                                         $newest = $day;
 708                                         $newest_date = $date;
 709                                 }
 710                         }
 711
 712                         if (count($creation_dates) == 1) {
 713                                 Logger::info('Feed had posted a single time, switching to daily polling', ['newest' => $newest_date, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 714                                 $priority = 8; // Poll once a day
 715                         }
 716
 717                         if (empty($priority) && (((time() / 86400) - $newest) > 730)) {
 718                                 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']]);
 719                                 $priority = 10; // Poll every month
 720                         }
 721
 722                         if (empty($priority) && (((time() / 86400) - $newest) > 365)) {
 723                                 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']]);
 724                                 $priority = 9; // Poll every week
 725                         }
 726
 727                         if (empty($priority) && empty($frequency)) {
 728                                 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']]);
 729                                 $priority = 8; // Poll once a day
 730                         }
 731
 732                         if (empty($priority)) {
 733                                 // Calculate the highest "posts per day" value
 734                                 $max = 0;
 735                                 foreach ($frequency as $entry) {
 736                                         if (($entry['count'] == 1) || ($entry['high'] == $entry['low'])) {
 737                                                 continue;
 738                                         }
 739
 740                                         // We take the earliest and latest post day and interpolate the number of post per day
 741                                         // that would had been created with this post frequency
 742
 743                                         // Assume at least four hours between oldest and newest post per day - should be okay for news outlets
 744                                         $duration = max($entry['high'] - $entry['low'], 14400);
 745                                         $ppd = (86400 / $duration) * $entry['count'];
 746                                         if ($ppd > $max) {
 747                                                 $max = $ppd;
 748                                         }
 749                                 }
 750                                 if ($max > 48) {
 751                                         $priority = 1; // Poll every quarter hour
 752                                 } elseif ($max > 24) {
 753                                         $priority = 2; // Poll half an hour
 754                                 } elseif ($max > 12) {
 755                                         $priority = 3; // Poll hourly
 756                                 } elseif ($max > 8) {
 757                                         $priority = 4; // Poll every two hours
 758                                 } elseif ($max > 4) {
 759                                         $priority = 5; // Poll every three hours
 760                                 } elseif ($max > 2) {
 761                                         $priority = 6; // Poll every six hours
 762                                 } else {
 763                                         $priority = 7; // Poll twice a day
 764                                 }
 765                                 Logger::info('Calculated priority by the posts per day', ['priority' => $priority, 'max' => round($max, 2), 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 766                         }
 767                 } else {
 768                         Logger::info('No posts, switching to daily polling', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 769                         $priority = 8; // Poll once a day
 770                 }
 771
 772                 if ($contact['rating'] != $priority) {
 773                         Logger::notice('Adjusting priority', ['old' => $contact['rating'], 'new' => $priority, 'id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $contact['url']]);
 774                         DBA::update('contact', ['rating' => $priority], ['id' => $contact['id']]);
 775                 }
 776         }
 777
 778         /**
 779          * Get the poll interval for the given contact array
 780          *
 781          * @param array $contact
 782          * @return int Poll interval in minutes
 783          */
 784         public static function getPollInterval(array $contact)
 785         {
 786                 if (in_array($contact['network'], [Protocol::MAIL, Protocol::FEED])) {
 787                         $ratings = [0, 3, 7, 8, 9, 10];
 788                         if (DI::config()->get('system', 'adjust_poll_frequency') && ($contact['network'] == Protocol::FEED)) {
 789                                 $rating = $contact['rating'];
 790                         } elseif (array_key_exists($contact['priority'], $ratings)) {
 791                                 $rating = $ratings[$contact['priority']];
 792                         } else {
 793                                 $rating = -1;
 794                         }
 795                 } else {
 796                         // Check once a week per default for all other networks
 797                         $rating = 9;
 798                 }
 799
 800                 // Friendica and OStatus are checked once a day
 801                 if (in_array($contact['network'], [Protocol::DFRN, Protocol::OSTATUS])) {
 802                         $rating = 8;
 803                 }
 804
 805                 // Check archived contacts or contacts with unsupported protocols once a month
 806                 if ($contact['archive'] || in_array($contact['network'], [Protocol::ZOT, Protocol::PHANTOM])) {
 807                         $rating = 10;
 808                 }
 809
 810                 if ($rating < 0) {
 811                         return 0;
 812                 }
 813                 /*
 814                  * Based on $contact['priority'], should we poll this site now? Or later?
 815                  */
 816
 817                 $min_poll_interval = max(1, DI::config()->get('system', 'min_poll_interval'));
 818
 819                 $poll_intervals = [$min_poll_interval, 15, 30, 60, 120, 180, 360, 720 ,1440, 10080, 43200];
 820
 821                 //$poll_intervals = [$min_poll_interval . ' minute', '15 minute', '30 minute',
 822                 //      '1 hour', '2 hour', '3 hour', '6 hour', '12 hour' ,'1 day', '1 week', '1 month'];
 823
 824                 return $poll_intervals[$rating];
 825         }
 826
 827         /**
 828          * Convert a tag array to a tag string
 829          *
 830          * @param array $tags
 831          * @return string tag string
 832          */
 833         private static function tagToString(array $tags)
 834         {
 835                 $tagstr = '';
 836
 837                 foreach ($tags as $tag) {
 838                         if ($tagstr != "") {
 839                                 $tagstr .= ", ";
 840                         }
 841
 842                         $tagstr .= "#[url=" . DI::baseUrl() . "/search?tag=" . urlencode($tag) . "]" . $tag . "[/url]";
 843                 }
 844
 845                 return $tagstr;
 846         }
 847
 848         private static function titleIsBody($title, $body)
 849         {
 850                 $title = strip_tags($title);
 851                 $title = trim($title);
 852                 $title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
 853                 $title = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $title);
 854
 855                 $body = strip_tags($body);
 856                 $body = trim($body);
 857                 $body = html_entity_decode($body, ENT_QUOTES, 'UTF-8');
 858                 $body = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $body);
 859
 860                 if (strlen($title) < strlen($body)) {
 861                         $body = substr($body, 0, strlen($title));
 862                 }
 863
 864                 if (($title != $body) && (substr($title, -3) == "...")) {
 865                         $pos = strrpos($title, "...");
 866                         if ($pos > 0) {
 867                                 $title = substr($title, 0, $pos);
 868                                 $body = substr($body, 0, $pos);
 869                         }
 870                 }
 871                 return ($title == $body);
 872         }
 873
 874         /**
 875          * Creates the Atom feed for a given nickname
 876          *
 877          * Supported filters:
 878          * - activity (default): all the public posts
 879          * - posts: all the public top-level posts
 880          * - comments: all the public replies
 881          *
 882          * Updates the provided last_update parameter if the result comes from the
 883          * cache or it is empty
 884          *
 885          * @param string  $owner_nick  Nickname of the feed owner
 886          * @param string  $last_update Date of the last update
 887          * @param integer $max_items   Number of maximum items to fetch
 888          * @param string  $filter      Feed items filter (activity, posts or comments)
 889          * @param boolean $nocache     Wether to bypass caching
 890          *
 891          * @return string Atom feed
 892          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 893          * @throws \ImagickException
 894          */
 895         public static function atom($owner_nick, $last_update, $max_items = 300, $filter = 'activity', $nocache = false)
 896         {
 897                 $stamp = microtime(true);
 898
 899                 $owner = User::getOwnerDataByNick($owner_nick);
 900                 if (!$owner) {
 901                         return;
 902                 }
 903
 904                 $cachekey = "feed:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
 905
 906                 $previous_created = $last_update;
 907
 908                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
 909                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
 910                         $result = DI::cache()->get($cachekey);
 911                         if (!$nocache && !is_null($result)) {
 912                                 Logger::info('Cached feed duration', ['seconds' => number_format(microtime(true) - $stamp, 3), 'nick' => $owner_nick, 'filter' => $filter, 'created' => $previous_created]);
 913                                 return $result['feed'];
 914                         }
 915                 }
 916
 917                 $check_date = empty($last_update) ? '' : DateTimeFormat::utc($last_update);
 918                 $authorid = Contact::getIdForURL($owner["url"]);
 919
 920                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted` AND `gravity` IN (?, ?)
 921                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?, ?, ?)",
 922                         $owner["uid"], $check_date, GRAVITY_PARENT, GRAVITY_COMMENT,
 923                         Item::PRIVATE, Protocol::ACTIVITYPUB,
 924                         Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA];
 925
 926                 if ($filter === 'comments') {
 927                         $condition[0] .= " AND `object-type` = ? ";
 928                         $condition[] = Activity\ObjectType::COMMENT;
 929                 }
 930
 931                 if ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
 932                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
 933                         $condition[] = $owner["id"];
 934                         $condition[] = $authorid;
 935                 }
 936
 937                 $params = ['order' => ['received' => true], 'limit' => $max_items];
 938
 939                 if ($filter === 'posts') {
 940                         $ret = Item::selectThread([], $condition, $params);
 941                 } else {
 942                         $ret = Item::select([], $condition, $params);
 943                 }
 944
 945                 $items = Item::inArray($ret);
 946
 947                 $doc = new DOMDocument('1.0', 'utf-8');
 948                 $doc->formatOutput = true;
 949
 950                 $root = self::addHeader($doc, $owner, $filter);
 951
 952                 foreach ($items as $item) {
 953                         $entry = self::entry($doc, $item, $owner);
 954                         $root->appendChild($entry);
 955
 956                         if ($last_update < $item['created']) {
 957                                 $last_update = $item['created'];
 958                         }
 959                 }
 960
 961                 $feeddata = trim($doc->saveXML());
 962
 963                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
 964                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
 965
 966                 Logger::info('Feed duration', ['seconds' => number_format(microtime(true) - $stamp, 3), 'nick' => $owner_nick, 'filter' => $filter, 'created' => $previous_created]);
 967
 968                 return $feeddata;
 969         }
 970
 971         /**
 972          * Adds the header elements to the XML document
 973          *
 974          * @param DOMDocument $doc       XML document
 975          * @param array       $owner     Contact data of the poster
 976          * @param string      $filter    The related feed filter (activity, posts or comments)
 977          *
 978          * @return object header root element
 979          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 980          */
 981         private static function addHeader(DOMDocument $doc, array $owner, $filter)
 982         {
 983                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
 984                 $doc->appendChild($root);
 985
 986                 $title = '';
 987                 $selfUri = '/feed/' . $owner["nick"] . '/';
 988                 switch ($filter) {
 989                         case 'activity':
 990                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
 991                                 $selfUri .= $filter;
 992                                 break;
 993                         case 'posts':
 994                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
 995                                 break;
 996                         case 'comments':
 997                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
 998                                 $selfUri .= $filter;
 999                                 break;
1000                 }
1001
1002                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1003                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1004                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
1005                 XML::addElement($doc, $root, "title", $title);
1006                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
1007                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1008                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1009
1010                 $author = self::addAuthor($doc, $owner);
1011                 $root->appendChild($author);
1012
1013                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1014                 XML::addElement($doc, $root, "link", "", $attributes);
1015
1016                 OStatus::hublinks($doc, $root, $owner["nick"]);
1017
1018                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
1019                 XML::addElement($doc, $root, "link", "", $attributes);
1020
1021                 return $root;
1022         }
1023
1024         /**
1025          * Adds the author element to the XML document
1026          *
1027          * @param DOMDocument $doc          XML document
1028          * @param array       $owner        Contact data of the poster
1029          *
1030          * @return \DOMElement author element
1031          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1032          */
1033         private static function addAuthor(DOMDocument $doc, array $owner)
1034         {
1035                 $author = $doc->createElement("author");
1036                 XML::addElement($doc, $author, "uri", $owner["url"]);
1037                 XML::addElement($doc, $author, "name", $owner["nick"]);
1038                 XML::addElement($doc, $author, "email", $owner["addr"]);
1039
1040                 return $author;
1041         }
1042
1043         /**
1044          * Adds an entry element to the XML document
1045          *
1046          * @param DOMDocument $doc       XML document
1047          * @param array       $item      Data of the item that is to be posted
1048          * @param array       $owner     Contact data of the poster
1049          * @param bool        $toplevel  optional default false
1050          *
1051          * @return \DOMElement Entry element
1052          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1053          * @throws \ImagickException
1054          */
1055         private static function entry(DOMDocument $doc, array $item, array $owner)
1056         {
1057                 $xml = null;
1058
1059                 $repeated_guid = OStatus::getResharedGuid($item);
1060                 if ($repeated_guid != "") {
1061                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid);
1062                 }
1063
1064                 if ($xml) {
1065                         return $xml;
1066                 }
1067
1068                 return self::noteEntry($doc, $item, $owner);
1069         }
1070
1071                 /**
1072          * Adds an entry element with reshared content
1073          *
1074          * @param DOMDocument $doc           XML document
1075          * @param array       $item          Data of the item that is to be posted
1076          * @param array       $owner         Contact data of the poster
1077          * @param string      $repeated_guid guid
1078          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
1079          *
1080          * @return bool Entry element
1081          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1082          * @throws \ImagickException
1083          */
1084         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid)
1085         {
1086                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1087                         Logger::info('Feed entry author does not match feed owner', ['owner' => $owner["url"], 'author' => $item["author-link"]]);
1088                 }
1089
1090                 $entry = OStatus::entryHeader($doc, $owner, $item, false);
1091
1092                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
1093                         'network' => Protocol::FEDERATED];
1094                 $repeated_item = Item::selectFirst([], $condition);
1095                 if (!DBA::isResult($repeated_item)) {
1096                         return false;
1097                 }
1098
1099                 self::entryContent($doc, $entry, $item, self::getTitle($repeated_item), Activity::SHARE, false);
1100
1101                 self::entryFooter($doc, $entry, $item, $owner);
1102
1103                 return $entry;
1104         }
1105
1106         /**
1107          * Adds a regular entry element
1108          *
1109          * @param DOMDocument $doc       XML document
1110          * @param array       $item      Data of the item that is to be posted
1111          * @param array       $owner     Contact data of the poster
1112          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1113          *
1114          * @return \DOMElement Entry element
1115          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1116          * @throws \ImagickException
1117          */
1118         private static function noteEntry(DOMDocument $doc, array $item, array $owner)
1119         {
1120                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1121                         Logger::info('Feed entry author does not match feed owner', ['owner' => $owner["url"], 'author' => $item["author-link"]]);
1122                 }
1123
1124                 $entry = OStatus::entryHeader($doc, $owner, $item, false);
1125
1126                 self::entryContent($doc, $entry, $item, self::getTitle($item), '', true);
1127
1128                 self::entryFooter($doc, $entry, $item, $owner);
1129
1130                 return $entry;
1131         }
1132
1133         /**
1134          * Adds elements to the XML document
1135          *
1136          * @param DOMDocument $doc       XML document
1137          * @param \DOMElement $entry     Entry element where the content is added
1138          * @param array       $item      Data of the item that is to be posted
1139          * @param array       $owner     Contact data of the poster
1140          * @param string      $title     Title for the post
1141          * @param string      $verb      The activity verb
1142          * @param bool        $complete  Add the "status_net" element?
1143          * @param bool        $feed_mode Behave like a regular feed for users if true
1144          * @return void
1145          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1146          */
1147         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, $title, $verb = "", $complete = true)
1148         {
1149                 if ($verb == "") {
1150                         $verb = OStatus::constructVerb($item);
1151                 }
1152
1153                 XML::addElement($doc, $entry, "id", $item["uri"]);
1154                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1155
1156                 $body = OStatus::formatPicturePost($item['body']);
1157
1158                 $body = BBCode::convert($body, false, BBCode::OSTATUS);
1159
1160                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1161
1162                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1163                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
1164                 );
1165
1166                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
1167                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
1168         }
1169
1170         /**
1171          * Adds the elements at the foot of an entry to the XML document
1172          *
1173          * @param DOMDocument $doc       XML document
1174          * @param object      $entry     The entry element where the elements are added
1175          * @param array       $item      Data of the item that is to be posted
1176          * @param array       $owner     Contact data of the poster
1177          * @param bool        $complete  default true
1178          * @return void
1179          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1180          */
1181         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner)
1182         {
1183                 $mentioned = [];
1184
1185                 if ($item['gravity'] != GRAVITY_PARENT) {
1186                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1187
1188                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $item['thr-parent']]);
1189
1190                         if (DBA::isResult($thrparent)) {
1191                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
1192                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
1193                                 $parent_plink = $thrparent["plink"];
1194                         } else {
1195                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
1196                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
1197                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
1198                         }
1199
1200                         $attributes = [
1201                                         "ref" => $item['thr-parent'],
1202                                         "href" => $parent_plink];
1203                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
1204
1205                         $attributes = [
1206                                         "rel" => "related",
1207                                         "href" => $parent_plink];
1208                         XML::addElement($doc, $entry, "link", "", $attributes);
1209                 }
1210
1211                 // uri-id isn't present for follow entry pseudo-items
1212                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
1213                 foreach ($tags as $tag) {
1214                         $mentioned[$tag['url']] = $tag['url'];
1215                 }
1216
1217                 foreach ($tags as $tag) {
1218                         if ($tag['type'] == Tag::HASHTAG) {
1219                                 XML::addElement($doc, $entry, "category", "", ["term" => $tag['name']]);
1220                         }
1221                 }
1222
1223                 OStatus::getAttachment($doc, $entry, $item);
1224         }
1225
1226         /**
1227          * Fetch or create title for feed entry
1228          *
1229          * @param array $item
1230          * @return string title
1231          */
1232         private static function getTitle(array $item)
1233         {
1234                 if ($item['title'] != '') {
1235                         return BBCode::convert($item['title'], false, BBCode::OSTATUS);
1236                 }
1237
1238                 // Fetch information about the post
1239                 $siteinfo = BBCode::getAttachedData($item["body"]);
1240                 if (isset($siteinfo["title"])) {
1241                         return $siteinfo["title"];
1242                 }
1243
1244                 // If no bookmark is found then take the first line
1245                 // Remove the share element before fetching the first line
1246                 $title = trim(preg_replace("/\[share.*?\](.*?)\[\/share\]/ism","\n$1\n",$item['body']));
1247
1248                 $title = HTML::toPlaintext(BBCode::convert($title, false), 0, true)."\n";
1249                 $pos = strpos($title, "\n");
1250                 $trailer = "";
1251                 if (($pos == 0) || ($pos > 100)) {
1252                         $pos = 100;
1253                         $trailer = "...";
1254                 }
1255
1256                 return substr($title, 0, $pos) . $trailer;
1257         }
1258 }