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