src/Protocol/OStatus.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\Text\BBCode;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Core\Cache\Duration;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Database\DBA;
  32 use Friendica\DI;
  33 use Friendica\Model\APContact;
  34 use Friendica\Model\Contact;
  35 use Friendica\Model\Conversation;
  36 use Friendica\Model\GContact;
  37 use Friendica\Model\Item;
  38 use Friendica\Model\User;
  39 use Friendica\Network\Probe;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Images;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy as ProxyUtils;
  44 use Friendica\Util\Strings;
  45 use Friendica\Util\XML;
  46
  47 require_once 'mod/share.php';
  48 require_once 'include/api.php';
  49
  50 /**
  51  * This class contain functions for the OStatus protocol
  52  */
  53 class OStatus
  54 {
  55         private static $itemlist;
  56         private static $conv_list = [];
  57
  58         /**
  59          * Fetches author data
  60          *
  61          * @param DOMXPath $xpath     The xpath object
  62          * @param object   $context   The xml context of the author details
  63          * @param array    $importer  user record of the importing user
  64          * @param array    $contact   Called by reference, will contain the fetched contact
  65          * @param bool     $onlyfetch Only fetch the header without updating the contact entries
  66          *
  67          * @return array Array of author related entries for the item
  68          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  69          * @throws \ImagickException
  70          */
  71         private static function fetchAuthor(DOMXPath $xpath, $context, array $importer, array &$contact = null, $onlyfetch)
  72         {
  73                 $author = [];
  74                 $author["author-link"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
  75                 $author["author-name"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $context);
  76                 $addr = XML::getFirstNodeValue($xpath, 'atom:author/atom:email/text()', $context);
  77
  78                 $aliaslink = $author["author-link"];
  79
  80                 $alternate_item = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0);
  81                 if (is_object($alternate_item)) {
  82                         foreach ($alternate_item->attributes as $attributes) {
  83                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
  84                                         $author["author-link"] = $attributes->textContent;
  85                                 }
  86                         }
  87                 }
  88                 $author["author-id"] = Contact::getIdForURL($author["author-link"]);
  89
  90                 $author['contact-id'] = ($contact['id'] ?? 0) ?: $author['author-id'];
  91
  92                 $contact = [];
  93
  94 /*
  95                 This here would be better, but we would get problems with contacts from the statusnet addon
  96                 This is kept here as a reminder for the future
  97
  98                 $cid = Contact::getIdForURL($author["author-link"], $importer["uid"]);
  99                 if ($cid) {
 100                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
 101                 }
 102 */
 103                 if ($aliaslink != '') {
 104                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ? AND `rel` IN (?, ?)",
 105                                         $importer["uid"], $aliaslink, Protocol::STATUSNET,
 106                                         Contact::SHARING, Contact::FRIEND];
 107                         $contact = DBA::selectFirst('contact', [], $condition);
 108                 }
 109
 110                 if (!DBA::isResult($contact) && $author["author-link"] != '') {
 111                         if ($aliaslink == "") {
 112                                 $aliaslink = $author["author-link"];
 113                         }
 114
 115                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ? AND `rel` IN (?, ?)",
 116                                         $importer["uid"], Strings::normaliseLink($author["author-link"]), Strings::normaliseLink($aliaslink),
 117                                         Protocol::STATUSNET, Contact::SHARING, Contact::FRIEND];
 118                         $contact = DBA::selectFirst('contact', [], $condition);
 119                 }
 120
 121                 if (!DBA::isResult($contact) && ($addr != '')) {
 122                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ? AND `rel` IN (?, ?)",
 123                                         $importer["uid"], $addr, Protocol::STATUSNET,
 124                                         Contact::SHARING, Contact::FRIEND];
 125                         $contact = DBA::selectFirst('contact', [], $condition);
 126                 }
 127
 128                 if (DBA::isResult($contact)) {
 129                         if ($contact['blocked']) {
 130                                 $contact['id'] = -1;
 131                         } elseif (!empty(APContact::getByURL($contact['url'], false))) {
 132                                 ActivityPub\Receiver::switchContact($contact['id'], $importer['uid'], $contact['url']);
 133                         }
 134                         $author["contact-id"] = $contact["id"];
 135                 }
 136
 137                 $avatarlist = [];
 138                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 139                 foreach ($avatars as $avatar) {
 140                         $href = "";
 141                         $width = 0;
 142                         foreach ($avatar->attributes as $attributes) {
 143                                 if ($attributes->name == "href") {
 144                                         $href = $attributes->textContent;
 145                                 }
 146                                 if ($attributes->name == "width") {
 147                                         $width = $attributes->textContent;
 148                                 }
 149                         }
 150                         if ($href != "") {
 151                                 $avatarlist[$width] = $href;
 152                         }
 153                 }
 154                 if (count($avatarlist) > 0) {
 155                         krsort($avatarlist);
 156                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 157                 }
 158
 159                 $displayname = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 160                 if ($displayname != "") {
 161                         $author["author-name"] = $displayname;
 162                 }
 163
 164                 $author["owner-id"] = $author["author-id"];
 165
 166                 // Only update the contacts if it is an OStatus contact
 167                 if (DBA::isResult($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact["network"] == Protocol::OSTATUS)) {
 168
 169                         // Update contact data
 170                         $current = $contact;
 171                         unset($current['name-date']);
 172
 173                         // This query doesn't seem to work
 174                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 175                         // if ($value != "")
 176                         //      $contact["notify"] = $value;
 177
 178                         // This query doesn't seem to work as well - I hate these queries
 179                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 180                         // if ($value != "")
 181                         //      $contact["poll"] = $value;
 182
 183                         $contact['url'] = $author["author-link"];
 184                         $contact['nurl'] = Strings::normaliseLink($contact['url']);
 185
 186                         $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
 187                         if ($value != "") {
 188                                 $contact["alias"] = $value;
 189                         }
 190
 191                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 192                         if ($value != "") {
 193                                 $contact["name"] = $value;
 194                         }
 195
 196                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 197                         if ($value != "") {
 198                                 $contact["nick"] = $value;
 199                         }
 200
 201                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()', $context);
 202                         if ($value != "") {
 203                                 $contact["about"] = HTML::toBBCode($value);
 204                         }
 205
 206                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()', $context);
 207                         if ($value != "") {
 208                                 $contact["location"] = $value;
 209                         }
 210
 211                         $contact['name-date'] = DateTimeFormat::utcNow();
 212
 213                         DBA::update('contact', $contact, ['id' => $contact["id"]], $current);
 214
 215                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 216                                 Logger::log("Update profile picture for contact ".$contact["id"], Logger::DEBUG);
 217                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
 218                         }
 219
 220                         // Ensure that we are having this contact (with uid=0)
 221                         $cid = Contact::getIdForURL($aliaslink, 0, true);
 222
 223                         if ($cid) {
 224                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 225                                 $old_contact = DBA::selectFirst('contact', $fields, ['id' => $cid]);
 226
 227                                 // Update it with the current values
 228                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 229                                                 'nurl' => Strings::normaliseLink($author["author-link"]),
 230                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 231                                                 'about' => $contact["about"], 'location' => $contact["location"],
 232                                                 'success_update' => DateTimeFormat::utcNow(), 'last-update' => DateTimeFormat::utcNow()];
 233
 234                                 DBA::update('contact', $fields, ['id' => $cid], $old_contact);
 235
 236                                 // Update the avatar
 237                                 if (!empty($author["author-avatar"])) {
 238                                         Contact::updateAvatar($author["author-avatar"], 0, $cid);
 239                                 }
 240                         }
 241
 242                         $contact["generation"] = 2;
 243                         $contact["hide"] = false; // OStatus contacts are never hidden
 244                         if (!empty($author["author-avatar"])) {
 245                                 $contact["photo"] = $author["author-avatar"];
 246                         }
 247                         $gcid = GContact::update($contact);
 248
 249                         GContact::link($gcid, $contact["uid"], $contact["id"]);
 250                 } elseif ($contact["network"] != Protocol::DFRN) {
 251                         $contact = [];
 252                 }
 253
 254                 return $author;
 255         }
 256
 257         /**
 258          * Fetches author data from a given XML string
 259          *
 260          * @param string $xml      The XML
 261          * @param array  $importer user record of the importing user
 262          *
 263          * @return array Array of author related entries for the item
 264          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 265          * @throws \ImagickException
 266          */
 267         public static function salmonAuthor($xml, array $importer)
 268         {
 269                 if ($xml == "") {
 270                         return;
 271                 }
 272
 273                 $doc = new DOMDocument();
 274                 @$doc->loadXML($xml);
 275
 276                 $xpath = new DOMXPath($doc);
 277                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 278                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 279                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 280                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 281                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 282                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 283                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 284                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 285
 286                 $contact = ["id" => 0];
 287
 288                 // Fetch the first author
 289                 $authordata = $xpath->query('//author')->item(0);
 290                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, true);
 291                 return $author;
 292         }
 293
 294         /**
 295          * Read attributes from element
 296          *
 297          * @param object $element Element object
 298          *
 299          * @return array attributes
 300          */
 301         private static function readAttributes($element)
 302         {
 303                 $attribute = [];
 304
 305                 foreach ($element->attributes as $attributes) {
 306                         $attribute[$attributes->name] = $attributes->textContent;
 307                 }
 308
 309                 return $attribute;
 310         }
 311
 312         /**
 313          * Imports an XML string containing OStatus elements
 314          *
 315          * @param string $xml      The XML
 316          * @param array  $importer user record of the importing user
 317          * @param array  $contact  contact
 318          * @param string $hub      Called by reference, returns the fetched hub data
 319          * @return void
 320          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 321          * @throws \ImagickException
 322          */
 323         public static function import($xml, array $importer, array &$contact, &$hub)
 324         {
 325                 self::process($xml, $importer, $contact, $hub);
 326         }
 327
 328         /**
 329          * Internal feed processing
 330          *
 331          * @param string  $xml        The XML
 332          * @param array   $importer   user record of the importing user
 333          * @param array   $contact    contact
 334          * @param string  $hub        Called by reference, returns the fetched hub data
 335          * @param boolean $stored     Is the post fresh imported or from the database?
 336          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 337          *
 338          * @return boolean Could the XML be processed?
 339          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 340          * @throws \ImagickException
 341          */
 342         private static function process($xml, array $importer, array &$contact = null, &$hub, $stored = false, $initialize = true)
 343         {
 344                 if ($initialize) {
 345                         self::$itemlist = [];
 346                         self::$conv_list = [];
 347                 }
 348
 349                 Logger::log('Import OStatus message for user ' . $importer['uid'], Logger::DEBUG);
 350
 351                 if ($xml == "") {
 352                         return false;
 353                 }
 354                 $doc = new DOMDocument();
 355                 @$doc->loadXML($xml);
 356
 357                 $xpath = new DOMXPath($doc);
 358                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 359                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 360                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 361                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 362                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 363                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 364                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 365                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 366
 367                 $hub = "";
 368                 $hub_items = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0);
 369                 if (is_object($hub_items)) {
 370                         $hub_attributes = $hub_items->attributes;
 371                         if (is_object($hub_attributes)) {
 372                                 foreach ($hub_attributes as $hub_attribute) {
 373                                         if ($hub_attribute->name == "href") {
 374                                                 $hub = $hub_attribute->textContent;
 375                                                 Logger::log("Found hub ".$hub, Logger::DEBUG);
 376                                         }
 377                                 }
 378                         }
 379                 }
 380
 381                 $header = [];
 382                 $header["uid"] = $importer["uid"];
 383                 $header["network"] = Protocol::OSTATUS;
 384                 $header["wall"] = 0;
 385                 $header["origin"] = 0;
 386                 $header["gravity"] = GRAVITY_COMMENT;
 387
 388                 if (!is_object($doc->firstChild) || empty($doc->firstChild->tagName)) {
 389                         return false;
 390                 }
 391
 392                 $first_child = $doc->firstChild->tagName;
 393
 394                 if ($first_child == "feed") {
 395                         $entries = $xpath->query('/atom:feed/atom:entry');
 396                 } else {
 397                         $entries = $xpath->query('/atom:entry');
 398                 }
 399
 400                 if ($entries->length == 1) {
 401                         // We reformat the XML to make it better readable
 402                         $doc2 = new DOMDocument();
 403                         $doc2->loadXML($xml);
 404                         $doc2->preserveWhiteSpace = false;
 405                         $doc2->formatOutput = true;
 406                         $xml2 = $doc2->saveXML();
 407
 408                         $header["protocol"] = Conversation::PARCEL_SALMON;
 409                         $header["source"] = $xml2;
 410                 } elseif (!$initialize) {
 411                         return false;
 412                 }
 413
 414                 // Fetch the first author
 415                 $authordata = $xpath->query('//author')->item(0);
 416                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 417
 418                 // Reverse the order of the entries
 419                 $entrylist = [];
 420
 421                 foreach ($entries as $entry) {
 422                         $entrylist[] = $entry;
 423                 }
 424
 425                 foreach (array_reverse($entrylist) as $entry) {
 426                         // fetch the author
 427                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 428
 429                         if ($authorelement->length == 0) {
 430                                 $authorelement = $xpath->query('atom:author', $entry);
 431                         }
 432
 433                         if ($authorelement->length > 0) {
 434                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 435                         }
 436
 437                         $item = array_merge($header, $author);
 438
 439                         $item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 440
 441                         $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
 442
 443                         // Delete a message
 444                         if (in_array($item["verb"], ['qvitter-delete-notice', Activity::DELETE, 'delete'])) {
 445                                 self::deleteNotice($item);
 446                                 continue;
 447                         }
 448
 449                         if (in_array($item["verb"], [Activity::O_UNFAVOURITE, Activity::UNFAVORITE])) {
 450                                 // Ignore "Unfavorite" message
 451                                 Logger::log("Ignore unfavorite message ".print_r($item, true), Logger::DEBUG);
 452                                 continue;
 453                         }
 454
 455                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 456                         if (Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 457                                 Logger::log('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 458                                 continue;
 459                         } else {
 460                                 Logger::log('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 461                         }
 462
 463                         if ($item["verb"] == Activity::JOIN) {
 464                                 // ignore "Join" messages
 465                                 Logger::log("Ignore join message ".print_r($item, true), Logger::DEBUG);
 466                                 continue;
 467                         }
 468
 469                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 470                                 // ignore mastodon "block" messages
 471                                 Logger::log("Ignore block message ".print_r($item, true), Logger::DEBUG);
 472                                 continue;
 473                         }
 474
 475                         if ($item["verb"] == Activity::FOLLOW) {
 476                                 Contact::addRelationship($importer, $contact, $item);
 477                                 continue;
 478                         }
 479
 480                         if ($item["verb"] == Activity::O_UNFOLLOW) {
 481                                 $dummy = null;
 482                                 Contact::removeFollower($importer, $contact, $item, $dummy);
 483                                 continue;
 484                         }
 485
 486                         if ($item["verb"] == Activity::FAVORITE) {
 487                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 488                                 Logger::log("Favorite ".$orig_uri." ".print_r($item, true));
 489
 490                                 $item["verb"] = Activity::LIKE;
 491                                 $item["parent-uri"] = $orig_uri;
 492                                 $item["gravity"] = GRAVITY_ACTIVITY;
 493                                 $item["object-type"] = Activity\ObjectType::NOTE;
 494                         }
 495
 496                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 497                         if (!in_array($item["verb"], [Activity::POST, Activity::LIKE, Activity::SHARE])) {
 498                                 Logger::log("Unhandled verb ".$item["verb"]." ".print_r($item, true), Logger::DEBUG);
 499                         }
 500
 501                         self::processPost($xpath, $entry, $item, $importer);
 502
 503                         if ($initialize && (count(self::$itemlist) > 0)) {
 504                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 505                                         // We will import it everytime, when it is started by our contacts
 506                                         $valid = Contact::isSharingByURL(self::$itemlist[0]['author-link'], self::$itemlist[0]['uid']);
 507
 508                                         if (!$valid) {
 509                                                 // If not, then it depends on this setting
 510                                                 $valid = ((self::$itemlist[0]['uid'] == 0) || !DI::pConfig()->get(self::$itemlist[0]['uid'], 'system', 'accept_only_sharer', false));
 511                                                 if ($valid) {
 512                                                         Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported due to the system settings.", Logger::DEBUG);
 513                                                 }
 514                                         } else {
 515                                                 Logger::log("Item with uri ".self::$itemlist[0]['uri']." belongs to a contact (".self::$itemlist[0]['contact-id']."). It will be imported.", Logger::DEBUG);
 516                                         }
 517                                         if ($valid) {
 518                                                 // Never post a thread when the only interaction by our contact was a like
 519                                                 $valid = false;
 520                                                 $verbs = [Activity::POST, Activity::SHARE];
 521                                                 foreach (self::$itemlist as $item) {
 522                                                         if (in_array($item['verb'], $verbs) && Contact::isSharingByURL($item['author-link'], $item['uid'])) {
 523                                                                 $valid = true;
 524                                                         }
 525                                                 }
 526                                                 if ($valid) {
 527                                                         Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported since the thread contains posts or shares.", Logger::DEBUG);
 528                                                 }
 529                                         }
 530                                 } else {
 531                                         // But we will only import complete threads
 532                                         $valid = Item::exists(['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 533                                         if ($valid) {
 534                                                 Logger::log("Item with uri ".self::$itemlist[0]["uri"]." belongs to parent ".self::$itemlist[0]['parent-uri']." of user ".$importer["uid"].". It will be imported.", Logger::DEBUG);
 535                                         }
 536                                 }
 537
 538                                 if ($valid) {
 539                                         $default_contact = 0;
 540                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 541                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 542                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 543                                                 } else {
 544                                                         $default_contact = $item['contact-id'];
 545                                                 }
 546                                         }
 547                                         foreach (self::$itemlist as $item) {
 548                                                 $found = Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 549                                                 if ($found) {
 550                                                         Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", Logger::DEBUG);
 551                                                 } elseif ($item['contact-id'] < 0) {
 552                                                         Logger::log("Item with uri ".$item["uri"]." is from a blocked contact.", Logger::DEBUG);
 553                                                 } else {
 554                                                         // We are having duplicated entries. Hopefully this solves it.
 555                                                         if (DI::lock()->acquire('ostatus_process_item_insert')) {
 556                                                                 $ret = Item::insert($item);
 557                                                                 DI::lock()->release('ostatus_process_item_insert');
 558                                                                 Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 559                                                         } else {
 560                                                                 $ret = Item::insert($item);
 561                                                                 Logger::log("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
 562                                                         }
 563                                                 }
 564                                         }
 565                                 }
 566                                 self::$itemlist = [];
 567                         }
 568                         Logger::log('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 569                 }
 570                 return true;
 571         }
 572
 573         /**
 574          * Removes notice item from database
 575          *
 576          * @param array $item item
 577          * @return void
 578          * @throws \Exception
 579          */
 580         private static function deleteNotice(array $item)
 581         {
 582                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'uri' => $item['uri']];
 583                 if (!Item::exists($condition)) {
 584                         Logger::log('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it.");
 585                         return;
 586                 }
 587
 588                 Item::markForDeletion($condition);
 589
 590                 Logger::log('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 591         }
 592
 593         /**
 594          * Processes the XML for a post
 595          *
 596          * @param DOMXPath $xpath    The xpath object
 597          * @param object   $entry    The xml entry that is processed
 598          * @param array    $item     The item array
 599          * @param array    $importer user record of the importing user
 600          * @return void
 601          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 602          * @throws \ImagickException
 603          */
 604         private static function processPost(DOMXPath $xpath, $entry, array &$item, array $importer)
 605         {
 606                 $item["body"] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 607                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 608                 if (($item["object-type"] == Activity\ObjectType::BOOKMARK) || ($item["object-type"] == Activity\ObjectType::EVENT)) {
 609                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 610                         $item["body"] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 611                 } elseif ($item["object-type"] == Activity\ObjectType::QUESTION) {
 612                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 613                 }
 614
 615                 $item["created"] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 616                 $item["edited"] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 617                 $item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 618
 619                 $conv = $xpath->query('ostatus:conversation', $entry);
 620                 if (is_object($conv->item(0))) {
 621                         foreach ($conv->item(0)->attributes as $attributes) {
 622                                 if ($attributes->name == "ref") {
 623                                         $item['conversation-uri'] = $attributes->textContent;
 624                                 }
 625                                 if ($attributes->name == "href") {
 626                                         $item['conversation-href'] = $attributes->textContent;
 627                                 }
 628                         }
 629                 }
 630
 631                 $related = "";
 632
 633                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 634                 if (is_object($inreplyto->item(0))) {
 635                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 636                                 if ($attributes->name == "ref") {
 637                                         $item["parent-uri"] = $attributes->textContent;
 638                                 }
 639                                 if ($attributes->name == "href") {
 640                                         $related = $attributes->textContent;
 641                                 }
 642                         }
 643                 }
 644
 645                 $georsspoint = $xpath->query('georss:point', $entry);
 646                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 647                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 648                 }
 649
 650                 $categories = $xpath->query('atom:category', $entry);
 651                 if ($categories) {
 652                         foreach ($categories as $category) {
 653                                 foreach ($category->attributes as $attributes) {
 654                                         if ($attributes->name == 'term') {
 655                                                 $term = $attributes->textContent;
 656                                                 if (!empty($item['tag'])) {
 657                                                         $item['tag'] .= ',';
 658                                                 } else {
 659                                                         $item['tag'] = '';
 660                                                 }
 661
 662                                                 $item['tag'] .= '#[url=' . DI::baseUrl() . '/search?tag=' . $term . ']' . $term . '[/url]';
 663                                         }
 664                                 }
 665                         }
 666                 }
 667
 668                 $self = '';
 669                 $add_body = '';
 670
 671                 $links = $xpath->query('atom:link', $entry);
 672                 if ($links) {
 673                         $link_data = self::processLinks($links, $item);
 674                         $self = $link_data['self'];
 675                         $add_body = $link_data['add_body'];
 676                 }
 677
 678                 $repeat_of = "";
 679
 680                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 681                 if ($notice_info && ($notice_info->length > 0)) {
 682                         foreach ($notice_info->item(0)->attributes as $attributes) {
 683                                 if ($attributes->name == "source") {
 684                                         $item["app"] = strip_tags($attributes->textContent);
 685                                 }
 686                                 if ($attributes->name == "repeat_of") {
 687                                         $repeat_of = $attributes->textContent;
 688                                 }
 689                         }
 690                 }
 691                 // Is it a repeated post?
 692                 if (($repeat_of != "") || ($item["verb"] == Activity::SHARE)) {
 693                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 694                         if (!empty($link_data['add_body'])) {
 695                                 $add_body .= $link_data['add_body'];
 696                         }
 697                 }
 698
 699                 $item["body"] .= $add_body;
 700
 701                 // Only add additional data when there is no picture in the post
 702                 if (!strstr($item["body"], '[/img]')) {
 703                         $item["body"] = add_page_info_to_body($item["body"]);
 704                 }
 705
 706                 // Mastodon Content Warning
 707                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 708                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 709                         if (!empty($clear_text)) {
 710                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 711                         }
 712                 }
 713
 714                 if (($self != '') && empty($item['protocol'])) {
 715                         self::fetchSelf($self, $item);
 716                 }
 717
 718                 if (!empty($item["conversation-href"])) {
 719                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 720                 }
 721
 722                 if (isset($item["parent-uri"])) {
 723                         if (!Item::exists(['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 724                                 if ($related != '') {
 725                                         self::fetchRelated($related, $item["parent-uri"], $importer);
 726                                 }
 727                         } else {
 728                                 Logger::log('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 729                         }
 730                 } else {
 731                         $item["parent-uri"] = $item["uri"];
 732                         $item["gravity"] = GRAVITY_PARENT;
 733                 }
 734
 735                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 736                         $item = Conversation::insert($item);
 737                 }
 738
 739                 self::$itemlist[] = $item;
 740         }
 741
 742         /**
 743          * Fetch the conversation for posts
 744          *
 745          * @param string $conversation     The link to the conversation
 746          * @param string $conversation_uri The conversation in "uri" format
 747          * @return void
 748          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 749          */
 750         private static function fetchConversation($conversation, $conversation_uri)
 751         {
 752                 // Ensure that we only store a conversation once in a process
 753                 if (isset(self::$conv_list[$conversation])) {
 754                         return;
 755                 }
 756
 757                 self::$conv_list[$conversation] = true;
 758
 759                 $curlResult = Network::curl($conversation, false, ['accept_content' => 'application/atom+xml, text/html']);
 760
 761                 if (!$curlResult->isSuccess()) {
 762                         return;
 763                 }
 764
 765                 $xml = '';
 766
 767                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 768                         $xml = $curlResult->getBody();
 769                 }
 770
 771                 if ($xml == '') {
 772                         $doc = new DOMDocument();
 773                         if (!@$doc->loadHTML($curlResult->getBody())) {
 774                                 return;
 775                         }
 776                         $xpath = new DOMXPath($doc);
 777
 778                         $links = $xpath->query('//link');
 779                         if ($links) {
 780                                 $file = '';
 781                                 foreach ($links as $link) {
 782                                         $attribute = self::readAttributes($link);
 783                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 784                                                 $file = $attribute['href'];
 785                                         }
 786                                 }
 787                                 if ($file != '') {
 788                                         $conversation_atom = Network::curl($attribute['href']);
 789
 790                                         if ($conversation_atom->isSuccess()) {
 791                                                 $xml = $conversation_atom->getBody();
 792                                         }
 793                                 }
 794                         }
 795                 }
 796
 797                 if ($xml == '') {
 798                         return;
 799                 }
 800
 801                 self::storeConversation($xml, $conversation, $conversation_uri);
 802         }
 803
 804         /**
 805          * Store a feed in several conversation entries
 806          *
 807          * @param string $xml              The feed
 808          * @param string $conversation     conversation
 809          * @param string $conversation_uri conversation uri
 810          * @return void
 811          * @throws \Exception
 812          */
 813         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 814         {
 815                 $doc = new DOMDocument();
 816                 @$doc->loadXML($xml);
 817
 818                 $xpath = new DOMXPath($doc);
 819                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 820                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 821                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 822
 823                 $entries = $xpath->query('/atom:feed/atom:entry');
 824
 825                 // Now store the entries
 826                 foreach ($entries as $entry) {
 827                         $doc2 = new DOMDocument();
 828                         $doc2->preserveWhiteSpace = false;
 829                         $doc2->formatOutput = true;
 830
 831                         $conv_data = [];
 832
 833                         $conv_data['protocol'] = Conversation::PARCEL_SPLIT_CONVERSATION;
 834                         $conv_data['network'] = Protocol::OSTATUS;
 835                         $conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 836
 837                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 838                         if (is_object($inreplyto->item(0))) {
 839                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 840                                         if ($attributes->name == "ref") {
 841                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 842                                         }
 843                                 }
 844                         }
 845
 846                         $conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 847
 848                         $conv = $xpath->query('ostatus:conversation', $entry);
 849                         if (is_object($conv->item(0))) {
 850                                 foreach ($conv->item(0)->attributes as $attributes) {
 851                                         if ($attributes->name == "ref") {
 852                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 853                                         }
 854                                         if ($attributes->name == "href") {
 855                                                 $conv_data['conversation-href'] = $attributes->textContent;
 856                                         }
 857                                 }
 858                         }
 859
 860                         if ($conversation != '') {
 861                                 $conv_data['conversation-uri'] = $conversation;
 862                         }
 863
 864                         if ($conversation_uri != '') {
 865                                 $conv_data['conversation-uri'] = $conversation_uri;
 866                         }
 867
 868                         $entry = $doc2->importNode($entry, true);
 869
 870                         $doc2->appendChild($entry);
 871
 872                         $conv_data['source'] = $doc2->saveXML();
 873
 874                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => Conversation::PARCEL_FEED];
 875                         if (DBA::exists('conversation', $condition)) {
 876                                 Logger::log('Delete deprecated entry for URI '.$conv_data['uri'], Logger::DEBUG);
 877                                 DBA::delete('conversation', ['item-uri' => $conv_data['uri']]);
 878                         }
 879
 880                         Logger::log('Store conversation data for uri '.$conv_data['uri'], Logger::DEBUG);
 881                         Conversation::insert($conv_data);
 882                 }
 883         }
 884
 885         /**
 886          * Fetch the own post so that it can be stored later
 887          *
 888          * We want to store the original data for later processing.
 889          * This function is meant for cases where we process a feed with multiple entries.
 890          * In that case we need to fetch the single posts here.
 891          *
 892          * @param string $self The link to the self item
 893          * @param array  $item The item array
 894          * @return void
 895          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 896          */
 897         private static function fetchSelf($self, array &$item)
 898         {
 899                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 900                 if (DBA::exists('conversation', $condition)) {
 901                         Logger::log('Conversation '.$item['uri'].' is already stored.', Logger::DEBUG);
 902                         return;
 903                 }
 904
 905                 $curlResult = Network::curl($self);
 906
 907                 if (!$curlResult->isSuccess()) {
 908                         return;
 909                 }
 910
 911                 // We reformat the XML to make it better readable
 912                 $doc = new DOMDocument();
 913                 $doc->loadXML($curlResult->getBody());
 914                 $doc->preserveWhiteSpace = false;
 915                 $doc->formatOutput = true;
 916                 $xml = $doc->saveXML();
 917
 918                 $item["protocol"] = Conversation::PARCEL_SALMON;
 919                 $item["source"] = $xml;
 920
 921                 Logger::log('Conversation '.$item['uri'].' is now fetched.', Logger::DEBUG);
 922         }
 923
 924         /**
 925          * Fetch related posts and processes them
 926          *
 927          * @param string $related     The link to the related item
 928          * @param string $related_uri The related item in "uri" format
 929          * @param array  $importer    user record of the importing user
 930          * @return void
 931          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 932          * @throws \ImagickException
 933          */
 934         private static function fetchRelated($related, $related_uri, $importer)
 935         {
 936                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 937                 $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 938                 if (DBA::isResult($conversation)) {
 939                         $stored = true;
 940                         $xml = $conversation['source'];
 941                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 942                                 Logger::log('Got valid cached XML for URI '.$related_uri, Logger::DEBUG);
 943                                 return;
 944                         }
 945                         if ($conversation['protocol'] == Conversation::PARCEL_SALMON) {
 946                                 Logger::log('Delete invalid cached XML for URI '.$related_uri, Logger::DEBUG);
 947                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 948                         }
 949                 }
 950
 951                 $stored = false;
 952                 $curlResult = Network::curl($related, false, ['accept_content' => 'application/atom+xml, text/html']);
 953
 954                 if (!$curlResult->isSuccess()) {
 955                         return;
 956                 }
 957
 958                 $xml = '';
 959
 960                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 961                         Logger::log('Directly fetched XML for URI ' . $related_uri, Logger::DEBUG);
 962                         $xml = $curlResult->getBody();
 963                 }
 964
 965                 if ($xml == '') {
 966                         $doc = new DOMDocument();
 967                         if (!@$doc->loadHTML($curlResult->getBody())) {
 968                                 return;
 969                         }
 970                         $xpath = new DOMXPath($doc);
 971
 972                         $atom_file = '';
 973
 974                         $links = $xpath->query('//link');
 975                         if ($links) {
 976                                 foreach ($links as $link) {
 977                                         $attribute = self::readAttributes($link);
 978                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 979                                                 $atom_file = $attribute['href'];
 980                                         }
 981                                 }
 982                                 if ($atom_file != '') {
 983                                         $curlResult = Network::curl($atom_file);
 984
 985                                         if ($curlResult->isSuccess()) {
 986                                                 Logger::log('Fetched XML for URI ' . $related_uri, Logger::DEBUG);
 987                                                 $xml = $curlResult->getBody();
 988                                         }
 989                                 }
 990                         }
 991                 }
 992
 993                 // Workaround for older GNU Social servers
 994                 if (($xml == '') && strstr($related, '/notice/')) {
 995                         $curlResult = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
 996
 997                         if ($curlResult->isSuccess()) {
 998                                 Logger::log('GNU Social workaround to fetch XML for URI ' . $related_uri, Logger::DEBUG);
 999                                 $xml = $curlResult->getBody();
1000                         }
1001                 }
1002
1003                 // Even more worse workaround for GNU Social ;-)
1004                 if ($xml == '') {
1005                         $related_guess = OStatus::convertHref($related_uri);
1006                         $curlResult = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
1007
1008                         if ($curlResult->isSuccess()) {
1009                                 Logger::log('GNU Social workaround 2 to fetch XML for URI ' . $related_uri, Logger::DEBUG);
1010                                 $xml = $curlResult->getBody();
1011                         }
1012                 }
1013
1014                 // Finally we take the data that we fetched from "ostatus:conversation"
1015                 if ($xml == '') {
1016                         $condition = ['item-uri' => $related_uri, 'protocol' => Conversation::PARCEL_SPLIT_CONVERSATION];
1017                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
1018                         if (DBA::isResult($conversation)) {
1019                                 $stored = true;
1020                                 Logger::log('Got cached XML from conversation for URI '.$related_uri, Logger::DEBUG);
1021                                 $xml = $conversation['source'];
1022                         }
1023                 }
1024
1025                 if ($xml != '') {
1026                         self::process($xml, $importer, $contact, $hub, $stored, false);
1027                 } else {
1028                         Logger::log("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, Logger::DEBUG);
1029                 }
1030                 return;
1031         }
1032
1033         /**
1034          * Processes the XML for a repeated post
1035          *
1036          * @param DOMXPath $xpath    The xpath object
1037          * @param object   $entry    The xml entry that is processed
1038          * @param array    $item     The item array
1039          * @param array    $importer user record of the importing user
1040          *
1041          * @return array with data from links
1042          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1043          * @throws \ImagickException
1044          */
1045         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer)
1046         {
1047                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
1048
1049                 if (!is_object($activityobject)) {
1050                         return [];
1051                 }
1052
1053                 $link_data = [];
1054
1055                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
1056
1057                 $links = $xpath->query("atom:link", $activityobject);
1058                 if ($links) {
1059                         $link_data = self::processLinks($links, $item);
1060                 }
1061
1062                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
1063                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
1064                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
1065
1066                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
1067
1068                 $item["author-name"] = $orig_author["author-name"];
1069                 $item["author-link"] = $orig_author["author-link"];
1070                 $item["author-id"] = $orig_author["author-id"];
1071
1072                 $item["body"] = HTML::toBBCode($orig_body);
1073                 $item["created"] = $orig_created;
1074                 $item["edited"] = $orig_edited;
1075
1076                 $item["uri"] = $orig_uri;
1077
1078                 $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
1079
1080                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
1081
1082                 // Mastodon Content Warning
1083                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
1084                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
1085                         if (!empty($clear_text)) {
1086                                 $item['content-warning'] = HTML::toBBCode($clear_text);
1087                         }
1088                 }
1089
1090                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
1091                 if (is_object($inreplyto->item(0))) {
1092                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1093                                 if ($attributes->name == "ref") {
1094                                         $item["parent-uri"] = $attributes->textContent;
1095                                 }
1096                         }
1097                 }
1098
1099                 return $link_data;
1100         }
1101
1102         /**
1103          * Processes links in the XML
1104          *
1105          * @param object $links The xml data that contain links
1106          * @param array  $item  The item array
1107          *
1108          * @return array with data from the links
1109          */
1110         private static function processLinks($links, array &$item)
1111         {
1112                 $link_data = ['add_body' => '', 'self' => ''];
1113
1114                 foreach ($links as $link) {
1115                         $attribute = self::readAttributes($link);
1116
1117                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1118                                 switch ($attribute['rel']) {
1119                                         case "alternate":
1120                                                 $item["plink"] = $attribute['href'];
1121                                                 if (($item["object-type"] == Activity\ObjectType::QUESTION)
1122                                                         || ($item["object-type"] == Activity\ObjectType::EVENT)
1123                                                 ) {
1124                                                         $item["body"] .= add_page_info($attribute['href']);
1125                                                 }
1126                                                 break;
1127                                         case "ostatus:conversation":
1128                                                 $link_data['conversation'] = $attribute['href'];
1129                                                 $item['conversation-href'] = $link_data['conversation'];
1130                                                 if (!isset($item['conversation-uri'])) {
1131                                                         $item['conversation-uri'] = $item['conversation-href'];
1132                                                 }
1133                                                 break;
1134                                         case "enclosure":
1135                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1136                                                 if ($filetype == 'image') {
1137                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1138                                                 } else {
1139                                                         if (!empty($item["attach"])) {
1140                                                                 $item["attach"] .= ',';
1141                                                         } else {
1142                                                                 $item["attach"] = '';
1143                                                         }
1144                                                         if (!isset($attribute['length'])) {
1145                                                                 $attribute['length'] = "0";
1146                                                         }
1147                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.($attribute['title'] ?? '') .'"[/attach]';
1148                                                 }
1149                                                 break;
1150                                         case "related":
1151                                                 if ($item["object-type"] != Activity\ObjectType::BOOKMARK) {
1152                                                         if (!isset($item["parent-uri"])) {
1153                                                                 $item["parent-uri"] = $attribute['href'];
1154                                                         }
1155                                                         $link_data['related'] = $attribute['href'];
1156                                                 } else {
1157                                                         $item["body"] .= add_page_info($attribute['href']);
1158                                                 }
1159                                                 break;
1160                                         case "self":
1161                                                 if (empty($item["plink"])) {
1162                                                         $item["plink"] = $attribute['href'];
1163                                                 }
1164                                                 $link_data['self'] = $attribute['href'];
1165                                                 break;
1166                                 }
1167                         }
1168                 }
1169                 return $link_data;
1170         }
1171
1172         /**
1173          * Create an url out of an uri
1174          *
1175          * @param string $href URI in the format "parameter1:parameter1:..."
1176          *
1177          * @return string URL in the format http(s)://....
1178          */
1179         public static function convertHref($href)
1180         {
1181                 $elements = explode(":", $href);
1182
1183                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1184                         return $href;
1185                 }
1186
1187                 $server = explode(",", $elements[1]);
1188                 $conversation = explode("=", $elements[2]);
1189
1190                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1191                         return "http://".$server[0]."/notice/".$elements[3];
1192                 }
1193
1194                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1195                         return $href;
1196                 }
1197                 if ($elements[3] == "objectType=thread") {
1198                         return "http://".$server[0]."/conversation/".$conversation[1];
1199                 } else {
1200                         return "http://".$server[0]."/notice/".$conversation[1];
1201                 }
1202         }
1203
1204         /**
1205          * Checks if the current post is a reshare
1206          *
1207          * @param array $item The item array of thw post
1208          *
1209          * @return string The guid if the post is a reshare
1210          */
1211         private static function getResharedGuid(array $item)
1212         {
1213                 $reshared = Item::getShareArray($item);
1214                 if (empty($reshared['guid']) || !empty($reshared['comment'])) {
1215                         return '';
1216                 }
1217
1218                 return $reshared['guid'];
1219         }
1220
1221         /**
1222          * Cleans the body of a post if it contains picture links
1223          *
1224          * @param string $body The body
1225          *
1226          * @return string The cleaned body
1227          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1228          */
1229         private static function formatPicturePost($body)
1230         {
1231                 $siteinfo = BBCode::getAttachedData($body);
1232
1233                 if (($siteinfo["type"] == "photo") && (!empty($siteinfo["preview"]) || !empty($siteinfo["image"]))) {
1234                         if (isset($siteinfo["preview"])) {
1235                                 $preview = $siteinfo["preview"];
1236                         } else {
1237                                 $preview = $siteinfo["image"];
1238                         }
1239
1240                         // Is it a remote picture? Then make a smaller preview here
1241                         $preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
1242
1243                         // Is it a local picture? Then make it smaller here
1244                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1245                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1246
1247                         if (isset($siteinfo["url"])) {
1248                                 $url = $siteinfo["url"];
1249                         } else {
1250                                 $url = $siteinfo["image"];
1251                         }
1252
1253                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1254                 }
1255
1256                 return $body;
1257         }
1258
1259         /**
1260          * Adds the header elements to the XML document
1261          *
1262          * @param DOMDocument $doc       XML document
1263          * @param array       $owner     Contact data of the poster
1264          * @param string      $filter    The related feed filter (activity, posts or comments)
1265          * @param bool        $feed_mode Behave like a regular feed for users if true
1266          *
1267          * @return object header root element
1268          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1269          */
1270         private static function addHeader(DOMDocument $doc, array $owner, $filter, $feed_mode = false)
1271         {
1272                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
1273                 $doc->appendChild($root);
1274
1275                 $root->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1276                 $root->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1277                 $root->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1278                 $root->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1279                 $root->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1280                 $root->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1281                 $root->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1282                 $root->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1283
1284                 $title = '';
1285                 $selfUri = '/feed/' . $owner["nick"] . '/';
1286                 switch ($filter) {
1287                         case 'activity':
1288                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1289                                 $selfUri .= $filter;
1290                                 break;
1291                         case 'posts':
1292                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1293                                 break;
1294                         case 'comments':
1295                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1296                                 $selfUri .= $filter;
1297                                 break;
1298                 }
1299
1300                 if (!$feed_mode) {
1301                         $selfUri = "/dfrn_poll/" . $owner["nick"];
1302                 }
1303
1304                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1305                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1306                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
1307                 XML::addElement($doc, $root, "title", $title);
1308                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
1309                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1310                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1311
1312                 $author = self::addAuthor($doc, $owner);
1313                 $root->appendChild($author);
1314
1315                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1316                 XML::addElement($doc, $root, "link", "", $attributes);
1317
1318                 /// @TODO We have to find out what this is
1319                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1320                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1321                 ///             "type" => "application/json");
1322                 /// XML::addElement($doc, $root, "link", "", $attributes);
1323
1324                 self::hublinks($doc, $root, $owner["nick"]);
1325
1326                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1327                 XML::addElement($doc, $root, "link", "", $attributes);
1328
1329                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1330                 XML::addElement($doc, $root, "link", "", $attributes);
1331
1332                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1333                 XML::addElement($doc, $root, "link", "", $attributes);
1334
1335                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
1336                 XML::addElement($doc, $root, "link", "", $attributes);
1337
1338                 if ($owner['account-type'] == Contact::TYPE_COMMUNITY) {
1339                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1340                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1341                         $members = DBA::count('contact', $condition);
1342                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1343                 }
1344
1345                 return $root;
1346         }
1347
1348         /**
1349          * Add the link to the push hubs to the XML document
1350          *
1351          * @param DOMDocument $doc  XML document
1352          * @param object      $root XML root element where the hub links are added
1353          * @param object      $nick nick
1354          * @return void
1355          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1356          */
1357         public static function hublinks(DOMDocument $doc, $root, $nick)
1358         {
1359                 $h = DI::baseUrl() . '/pubsubhubbub/'.$nick;
1360                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1361         }
1362
1363         /**
1364          * Adds attachment data to the XML document
1365          *
1366          * @param DOMDocument $doc  XML document
1367          * @param object      $root XML root element where the hub links are added
1368          * @param array       $item Data of the item that is to be posted
1369          * @return void
1370          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1371          */
1372         private static function getAttachment(DOMDocument $doc, $root, $item)
1373         {
1374                 $siteinfo = BBCode::getAttachedData($item["body"]);
1375
1376                 switch ($siteinfo["type"]) {
1377                         case 'photo':
1378                                 if (!empty($siteinfo["image"])) {
1379                                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1380                                         if ($imgdata) {
1381                                                 $attributes = ["rel" => "enclosure",
1382                                                                 "href" => $siteinfo["image"],
1383                                                                 "type" => $imgdata["mime"],
1384                                                                 "length" => intval($imgdata["size"])];
1385                                                 XML::addElement($doc, $root, "link", "", $attributes);
1386                                         }
1387                                 }
1388                                 break;
1389                         case 'video':
1390                                 $attributes = ["rel" => "enclosure",
1391                                                 "href" => $siteinfo["url"],
1392                                                 "type" => "text/html; charset=UTF-8",
1393                                                 "length" => "",
1394                                                 "title" => ($siteinfo["title"] ?? '') ?: $siteinfo["url"],
1395                                 ];
1396                                 XML::addElement($doc, $root, "link", "", $attributes);
1397                                 break;
1398                         default:
1399                                 break;
1400                 }
1401
1402                 if (!DI::config()->get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1403                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1404                         if ($imgdata) {
1405                                 $attributes = ["rel" => "enclosure",
1406                                                 "href" => $siteinfo["image"],
1407                                                 "type" => $imgdata["mime"],
1408                                                 "length" => intval($imgdata["size"])];
1409
1410                                 XML::addElement($doc, $root, "link", "", $attributes);
1411                         }
1412                 }
1413
1414                 $arr = explode('[/attach],', $item['attach']);
1415                 if (count($arr)) {
1416                         foreach ($arr as $r) {
1417                                 $matches = false;
1418                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1419                                 if ($cnt) {
1420                                         $attributes = ["rel" => "enclosure",
1421                                                         "href" => $matches[1],
1422                                                         "type" => $matches[3]];
1423
1424                                         if (intval($matches[2])) {
1425                                                 $attributes["length"] = intval($matches[2]);
1426                                         }
1427                                         if (trim($matches[4]) != "") {
1428                                                 $attributes["title"] = trim($matches[4]);
1429                                         }
1430                                         XML::addElement($doc, $root, "link", "", $attributes);
1431                                 }
1432                         }
1433                 }
1434         }
1435
1436         /**
1437          * Adds the author element to the XML document
1438          *
1439          * @param DOMDocument $doc          XML document
1440          * @param array       $owner        Contact data of the poster
1441          * @param bool        $show_profile Whether to show profile
1442          *
1443          * @return \DOMElement author element
1444          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1445          */
1446         private static function addAuthor(DOMDocument $doc, array $owner, $show_profile = true)
1447         {
1448                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1449                 $author = $doc->createElement("author");
1450                 XML::addElement($doc, $author, "id", $owner["url"]);
1451                 if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1452                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::GROUP);
1453                 } else {
1454                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::PERSON);
1455                 }
1456                 XML::addElement($doc, $author, "uri", $owner["url"]);
1457                 XML::addElement($doc, $author, "name", $owner["nick"]);
1458                 XML::addElement($doc, $author, "email", $owner["addr"]);
1459                 if ($show_profile) {
1460                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, 7));
1461                 }
1462
1463                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1464                 XML::addElement($doc, $author, "link", "", $attributes);
1465
1466                 $attributes = [
1467                                 "rel" => "avatar",
1468                                 "type" => "image/jpeg", // To-Do?
1469                                 "media:width" => 300,
1470                                 "media:height" => 300,
1471                                 "href" => $owner["photo"]];
1472                 XML::addElement($doc, $author, "link", "", $attributes);
1473
1474                 if (isset($owner["thumb"])) {
1475                         $attributes = [
1476                                         "rel" => "avatar",
1477                                         "type" => "image/jpeg", // To-Do?
1478                                         "media:width" => 80,
1479                                         "media:height" => 80,
1480                                         "href" => $owner["thumb"]];
1481                         XML::addElement($doc, $author, "link", "", $attributes);
1482                 }
1483
1484                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1485                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1486                 if ($show_profile) {
1487                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, 7));
1488
1489                         if (trim($owner["location"]) != "") {
1490                                 $element = $doc->createElement("poco:address");
1491                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1492                                 $author->appendChild($element);
1493                         }
1494                 }
1495
1496                 if (DBA::isResult($profile) && !$show_profile) {
1497                         if (trim($profile["homepage"]) != "") {
1498                                 $urls = $doc->createElement("poco:urls");
1499                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1500                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1501                                 XML::addElement($doc, $urls, "poco:primary", "true");
1502                                 $author->appendChild($urls);
1503                         }
1504
1505                         XML::addElement($doc, $author, "followers", "", ["url" => DI::baseUrl() . "/profile/" . $owner["nick"] . "/contacts/followers"]);
1506                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1507
1508                         if ($profile["publish"]) {
1509                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1510                         }
1511                 }
1512
1513                 return $author;
1514         }
1515
1516         /**
1517          * @TODO Picture attachments should look like this:
1518          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1519          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1520          */
1521
1522         /**
1523          * Returns the given activity if present - otherwise returns the "post" activity
1524          *
1525          * @param array $item Data of the item that is to be posted
1526          *
1527          * @return string activity
1528          */
1529         private static function constructVerb(array $item)
1530         {
1531                 if (!empty($item['verb'])) {
1532                         return $item['verb'];
1533                 }
1534
1535                 return Activity::POST;
1536         }
1537
1538         /**
1539          * Returns the given object type if present - otherwise returns the "note" object type
1540          *
1541          * @param array $item Data of the item that is to be posted
1542          *
1543          * @return string Object type
1544          */
1545         private static function constructObjecttype(array $item)
1546         {
1547                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1548                         return $item['object-type'];
1549                 }
1550
1551                 return Activity\ObjectType::NOTE;
1552         }
1553
1554         /**
1555          * Adds an entry element to the XML document
1556          *
1557          * @param DOMDocument $doc       XML document
1558          * @param array       $item      Data of the item that is to be posted
1559          * @param array       $owner     Contact data of the poster
1560          * @param bool        $toplevel  optional default false
1561          * @param bool        $feed_mode Behave like a regular feed for users if true
1562          *
1563          * @return \DOMElement Entry element
1564          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1565          * @throws \ImagickException
1566          */
1567         private static function entry(DOMDocument $doc, array $item, array $owner, $toplevel = false, $feed_mode = false)
1568         {
1569                 $xml = null;
1570
1571                 $repeated_guid = self::getResharedGuid($item);
1572                 if ($repeated_guid != "") {
1573                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1574                 }
1575
1576                 if ($xml) {
1577                         return $xml;
1578                 }
1579
1580                 if ($item["verb"] == Activity::LIKE) {
1581                         return self::likeEntry($doc, $item, $owner, $toplevel);
1582                 } elseif (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1583                         return self::followEntry($doc, $item, $owner, $toplevel);
1584                 } else {
1585                         return self::noteEntry($doc, $item, $owner, $toplevel, $feed_mode);
1586                 }
1587         }
1588
1589         /**
1590          * Adds a source entry to the XML document
1591          *
1592          * @param DOMDocument $doc     XML document
1593          * @param array       $contact Array of the contact that is added
1594          *
1595          * @return \DOMElement Source element
1596          * @throws \Exception
1597          */
1598         private static function sourceEntry(DOMDocument $doc, array $contact)
1599         {
1600                 $source = $doc->createElement("source");
1601                 XML::addElement($doc, $source, "id", $contact["poll"]);
1602                 XML::addElement($doc, $source, "title", $contact["name"]);
1603                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1604                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1605                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1606                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1607
1608                 return $source;
1609         }
1610
1611         /**
1612          * Fetches contact data from the contact or the gcontact table
1613          *
1614          * @param string $url   URL of the contact
1615          * @param array  $owner Contact data of the poster
1616          *
1617          * @return array Contact array
1618          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1619          * @throws \ImagickException
1620          */
1621         private static function contactEntry($url, array $owner)
1622         {
1623                 $r = q(
1624                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1625                         DBA::escape(Strings::normaliseLink($url)),
1626                         intval($owner["uid"])
1627                 );
1628                 if (DBA::isResult($r)) {
1629                         $contact = $r[0];
1630                         $contact["uid"] = -1;
1631                 }
1632
1633                 if (!DBA::isResult($r)) {
1634                         $gcontact = DBA::selectFirst('gcontact', [], ['nurl' => Strings::normaliseLink($url)]);
1635                         if (DBA::isResult($r)) {
1636                                 $contact = $gcontact;
1637                                 $contact["uid"] = -1;
1638                                 $contact["success_update"] = $contact["updated"];
1639                         }
1640                 }
1641
1642                 if (!DBA::isResult($r)) {
1643                         $contact = $owner;
1644                 }
1645
1646                 if (!isset($contact["poll"])) {
1647                         $data = Probe::uri($url);
1648                         $contact["poll"] = $data["poll"];
1649
1650                         if (!$contact["alias"]) {
1651                                 $contact["alias"] = $data["alias"];
1652                         }
1653                 }
1654
1655                 if (!isset($contact["alias"])) {
1656                         $contact["alias"] = $contact["url"];
1657                 }
1658
1659                 $contact['account-type'] = $owner['account-type'];
1660
1661                 return $contact;
1662         }
1663
1664         /**
1665          * Adds an entry element with reshared content
1666          *
1667          * @param DOMDocument $doc           XML document
1668          * @param array       $item          Data of the item that is to be posted
1669          * @param array       $owner         Contact data of the poster
1670          * @param string      $repeated_guid guid
1671          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
1672          *
1673          * @return bool Entry element
1674          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1675          * @throws \ImagickException
1676          */
1677         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid, $toplevel)
1678         {
1679                 if (($item["id"] != $item["parent"]) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1680                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1681                 }
1682
1683                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1684
1685                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
1686                         'network' => [Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS]];
1687                 $repeated_item = Item::selectFirst([], $condition);
1688                 if (!DBA::isResult($repeated_item)) {
1689                         return false;
1690                 }
1691
1692                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1693
1694                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1695
1696                 self::entryContent($doc, $entry, $item, $owner, $title, Activity::SHARE, false);
1697
1698                 $as_object = $doc->createElement("activity:object");
1699
1700                 XML::addElement($doc, $as_object, "activity:object-type", ActivityNamespace::ACTIVITY_SCHEMA . "activity");
1701
1702                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1703
1704                 $author = self::addAuthor($doc, $contact, false);
1705                 $as_object->appendChild($author);
1706
1707                 $as_object2 = $doc->createElement("activity:object");
1708
1709                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1710
1711                 $title = sprintf("New comment by %s", $contact["nick"]);
1712
1713                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1714
1715                 $as_object->appendChild($as_object2);
1716
1717                 self::entryFooter($doc, $as_object, $item, $owner, false);
1718
1719                 $source = self::sourceEntry($doc, $contact);
1720
1721                 $as_object->appendChild($source);
1722
1723                 $entry->appendChild($as_object);
1724
1725                 self::entryFooter($doc, $entry, $item, $owner);
1726
1727                 return $entry;
1728         }
1729
1730         /**
1731          * Adds an entry element with a "like"
1732          *
1733          * @param DOMDocument $doc      XML document
1734          * @param array       $item     Data of the item that is to be posted
1735          * @param array       $owner    Contact data of the poster
1736          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1737          *
1738          * @return \DOMElement Entry element with "like"
1739          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1740          * @throws \ImagickException
1741          */
1742         private static function likeEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1743         {
1744                 if (($item["id"] != $item["parent"]) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1745                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1746                 }
1747
1748                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1749
1750                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . "favorite";
1751                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1752
1753                 $parent = Item::selectFirst([], ['uri' => $item["thr-parent"], 'uid' => $item["uid"]]);
1754                 if (DBA::isResult($parent)) {
1755                         $as_object = $doc->createElement("activity:object");
1756
1757                         XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent));
1758
1759                         self::entryContent($doc, $as_object, $parent, $owner, "New entry");
1760
1761                         $entry->appendChild($as_object);
1762                 }
1763
1764                 self::entryFooter($doc, $entry, $item, $owner);
1765
1766                 return $entry;
1767         }
1768
1769         /**
1770          * Adds the person object element to the XML document
1771          *
1772          * @param DOMDocument $doc     XML document
1773          * @param array       $owner   Contact data of the poster
1774          * @param array       $contact Contact data of the target
1775          *
1776          * @return object author element
1777          */
1778         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact)
1779         {
1780                 $object = $doc->createElement("activity:object");
1781                 XML::addElement($doc, $object, "activity:object-type", Activity\ObjectType::PERSON);
1782
1783                 if ($contact['network'] == Protocol::PHANTOM) {
1784                         XML::addElement($doc, $object, "id", $contact['url']);
1785                         return $object;
1786                 }
1787
1788                 XML::addElement($doc, $object, "id", $contact["alias"]);
1789                 XML::addElement($doc, $object, "title", $contact["nick"]);
1790
1791                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1792                 XML::addElement($doc, $object, "link", "", $attributes);
1793
1794                 $attributes = [
1795                                 "rel" => "avatar",
1796                                 "type" => "image/jpeg", // To-Do?
1797                                 "media:width" => 300,
1798                                 "media:height" => 300,
1799                                 "href" => $contact["photo"]];
1800                 XML::addElement($doc, $object, "link", "", $attributes);
1801
1802                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1803                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1804
1805                 if (trim($contact["location"]) != "") {
1806                         $element = $doc->createElement("poco:address");
1807                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1808                         $object->appendChild($element);
1809                 }
1810
1811                 return $object;
1812         }
1813
1814         /**
1815          * Adds a follow/unfollow entry element
1816          *
1817          * @param DOMDocument $doc      XML document
1818          * @param array       $item     Data of the follow/unfollow message
1819          * @param array       $owner    Contact data of the poster
1820          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1821          *
1822          * @return \DOMElement Entry element
1823          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1824          * @throws \ImagickException
1825          */
1826         private static function followEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1827         {
1828                 $item["id"] = $item["parent"] = 0;
1829                 $item["created"] = $item["edited"] = date("c");
1830                 $item["private"] = Item::PRIVATE;
1831
1832                 $contact = Probe::uri($item['follow']);
1833
1834                 if ($contact['alias'] == '') {
1835                         $contact['alias'] = $contact["url"];
1836                 } else {
1837                         $item['follow'] = $contact['alias'];
1838                 }
1839
1840                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact["url"])];
1841                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1842
1843                 if (DBA::isResult($user_contact)) {
1844                         $connect_id = $user_contact['id'];
1845                 } else {
1846                         $connect_id = 0;
1847                 }
1848
1849                 if ($item['verb'] == Activity::FOLLOW) {
1850                         $message = DI::l10n()->t('%s is now following %s.');
1851                         $title = DI::l10n()->t('following');
1852                         $action = "subscription";
1853                 } else {
1854                         $message = DI::l10n()->t('%s stopped following %s.');
1855                         $title = DI::l10n()->t('stopped following');
1856                         $action = "unfollow";
1857                 }
1858
1859                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1860                                 = 'tag:' . DI::baseUrl()->getHostname().
1861                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1862                                 ':person:'.$connect_id.':'.$item['created'];
1863
1864                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1865
1866                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1867
1868                 self::entryContent($doc, $entry, $item, $owner, $title);
1869
1870                 $object = self::addPersonObject($doc, $owner, $contact);
1871                 $entry->appendChild($object);
1872
1873                 self::entryFooter($doc, $entry, $item, $owner);
1874
1875                 return $entry;
1876         }
1877
1878         /**
1879          * Adds a regular entry element
1880          *
1881          * @param DOMDocument $doc       XML document
1882          * @param array       $item      Data of the item that is to be posted
1883          * @param array       $owner     Contact data of the poster
1884          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1885          * @param bool        $feed_mode Behave like a regular feed for users if true
1886          *
1887          * @return \DOMElement Entry element
1888          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1889          * @throws \ImagickException
1890          */
1891         private static function noteEntry(DOMDocument $doc, array $item, array $owner, $toplevel, $feed_mode)
1892         {
1893                 if (($item["id"] != $item["parent"]) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1894                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1895                 }
1896
1897                 if (!$toplevel) {
1898                         if (!empty($item['title'])) {
1899                                 $title = BBCode::convert($item['title'], false, 7);
1900                         } else {
1901                                 $title = sprintf("New note by %s", $owner["nick"]);
1902                         }
1903                 } else {
1904                         $title = sprintf("New comment by %s", $owner["nick"]);
1905                 }
1906
1907                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1908
1909                 XML::addElement($doc, $entry, "activity:object-type", Activity\ObjectType::NOTE);
1910
1911                 self::entryContent($doc, $entry, $item, $owner, $title, '', true, $feed_mode);
1912
1913                 self::entryFooter($doc, $entry, $item, $owner, !$feed_mode, $feed_mode);
1914
1915                 return $entry;
1916         }
1917
1918         /**
1919          * Adds a header element to the XML document
1920          *
1921          * @param DOMDocument $doc      XML document
1922          * @param array       $owner    Contact data of the poster
1923          * @param array       $item
1924          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1925          *
1926          * @return \DOMElement The entry element where the elements are added
1927          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1928          * @throws \ImagickException
1929          */
1930         private static function entryHeader(DOMDocument $doc, array $owner, array $item, $toplevel)
1931         {
1932                 if (!$toplevel) {
1933                         $entry = $doc->createElement("entry");
1934
1935                         if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1936                                 $contact = self::contactEntry($item['author-link'], $owner);
1937                                 $author = self::addAuthor($doc, $contact, false);
1938                                 $entry->appendChild($author);
1939                         }
1940                 } else {
1941                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, "entry");
1942
1943                         $entry->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1944                         $entry->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1945                         $entry->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1946                         $entry->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1947                         $entry->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1948                         $entry->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1949                         $entry->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1950                         $entry->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1951
1952                         $author = self::addAuthor($doc, $owner);
1953                         $entry->appendChild($author);
1954                 }
1955
1956                 return $entry;
1957         }
1958
1959         /**
1960          * Adds elements to the XML document
1961          *
1962          * @param DOMDocument $doc       XML document
1963          * @param \DOMElement $entry     Entry element where the content is added
1964          * @param array       $item      Data of the item that is to be posted
1965          * @param array       $owner     Contact data of the poster
1966          * @param string      $title     Title for the post
1967          * @param string      $verb      The activity verb
1968          * @param bool        $complete  Add the "status_net" element?
1969          * @param bool        $feed_mode Behave like a regular feed for users if true
1970          * @return void
1971          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1972          */
1973         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, array $owner, $title, $verb = "", $complete = true, $feed_mode = false)
1974         {
1975                 if ($verb == "") {
1976                         $verb = self::constructVerb($item);
1977                 }
1978
1979                 XML::addElement($doc, $entry, "id", $item["uri"]);
1980                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1981
1982                 $body = self::formatPicturePost($item['body']);
1983
1984                 if (!empty($item['title']) && !$feed_mode) {
1985                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1986                 }
1987
1988                 $body = BBCode::convert($body, false, 7);
1989
1990                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1991
1992                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1993                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
1994                 );
1995
1996                 if (!$feed_mode && $complete && ($item["id"] > 0)) {
1997                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
1998                 }
1999
2000                 if (!$feed_mode) {
2001                         XML::addElement($doc, $entry, "activity:verb", $verb);
2002                 }
2003
2004                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
2005                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
2006         }
2007
2008         /**
2009          * Adds the elements at the foot of an entry to the XML document
2010          *
2011          * @param DOMDocument $doc       XML document
2012          * @param object      $entry     The entry element where the elements are added
2013          * @param array       $item      Data of the item that is to be posted
2014          * @param array       $owner     Contact data of the poster
2015          * @param bool        $complete  default true
2016          * @param bool        $feed_mode Behave like a regular feed for users if true
2017          * @return void
2018          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2019          */
2020         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, $complete = true, $feed_mode = false)
2021         {
2022                 $mentioned = [];
2023
2024                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
2025                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item["parent"]]);
2026                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
2027
2028                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $parent_item]);
2029
2030                         if (DBA::isResult($thrparent)) {
2031                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
2032                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
2033                                 $parent_plink = $thrparent["plink"];
2034                         } else {
2035                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
2036                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
2037                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
2038                         }
2039
2040                         $attributes = [
2041                                         "ref" => $parent_item,
2042                                         "href" => $parent_plink];
2043                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
2044
2045                         $attributes = [
2046                                         "rel" => "related",
2047                                         "href" => $parent_plink];
2048                         XML::addElement($doc, $entry, "link", "", $attributes);
2049                 }
2050
2051                 if (!$feed_mode && (intval($item["parent"]) > 0)) {
2052                         $conversation_href = $conversation_uri = str_replace('/objects/', '/context/', $item['parent-uri']);
2053
2054                         if (isset($parent_item)) {
2055                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
2056                                 if (DBA::isResult($conversation)) {
2057                                         if ($conversation['conversation-uri'] != '') {
2058                                                 $conversation_uri = $conversation['conversation-uri'];
2059                                         }
2060                                         if ($conversation['conversation-href'] != '') {
2061                                                 $conversation_href = $conversation['conversation-href'];
2062                                         }
2063                                 }
2064                         }
2065
2066                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
2067
2068                         $attributes = [
2069                                         "href" => $conversation_href,
2070                                         "local_id" => $item["parent"],
2071                                         "ref" => $conversation_uri];
2072
2073                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
2074                 }
2075
2076                 $tags = item::getFeedTags($item);
2077
2078                 if (count($tags)) {
2079                         foreach ($tags as $t) {
2080                                 if ($t[0] == "@") {
2081                                         $mentioned[$t[1]] = $t[1];
2082                                 }
2083                         }
2084                 }
2085
2086                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
2087                 $newmentions = [];
2088                 foreach ($mentioned as $mention) {
2089                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
2090                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
2091                 }
2092                 $mentioned = $newmentions;
2093
2094                 foreach ($mentioned as $mention) {
2095                         $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($mention)];
2096                         $contact = DBA::selectFirst('contact', ['forum', 'prv', 'self', 'contact-type'], $condition);
2097                         if ($contact["forum"] || $contact["prv"] || ($owner['contact-type'] == Contact::TYPE_COMMUNITY) ||
2098                                 ($contact['self'] && ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY))) {
2099                                 XML::addElement($doc, $entry, "link", "",
2100                                         [
2101                                                 "rel" => "mentioned",
2102                                                 "ostatus:object-type" => Activity\ObjectType::GROUP,
2103                                                 "href" => $mention]
2104                                 );
2105                         } else {
2106                                 XML::addElement($doc, $entry, "link", "",
2107                                         [
2108                                                 "rel" => "mentioned",
2109                                                 "ostatus:object-type" => Activity\ObjectType::PERSON,
2110                                                 "href" => $mention]
2111                                 );
2112                         }
2113                 }
2114
2115                 if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
2116                         XML::addElement($doc, $entry, "link", "", [
2117                                 "rel" => "mentioned",
2118                                 "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2119                                 "href" => $owner['url']
2120                         ]);
2121                 }
2122
2123                 if (($item['private'] != Item::PRIVATE) && !$feed_mode) {
2124                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2125                                                                         "href" => "http://activityschema.org/collection/public"]);
2126                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2127                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2128                                                                         "href" => "http://activityschema.org/collection/public"]);
2129                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2130                 }
2131
2132                 if (count($tags)) {
2133                         foreach ($tags as $t) {
2134                                 if ($t[0] != "@") {
2135                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2136                                 }
2137                         }
2138                 }
2139
2140                 self::getAttachment($doc, $entry, $item);
2141
2142                 if ($complete && ($item["id"] > 0)) {
2143                         $app = $item["app"];
2144                         if ($app == "") {
2145                                 $app = "web";
2146                         }
2147
2148                         $attributes = ["local_id" => $item["id"], "source" => $app];
2149
2150                         if (isset($parent["id"])) {
2151                                 $attributes["repeat_of"] = $parent["id"];
2152                         }
2153
2154                         if ($item["coord"] != "") {
2155                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2156                         }
2157
2158                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2159                 }
2160         }
2161
2162         /**
2163          * Creates the XML feed for a given nickname
2164          *
2165          * Supported filters:
2166          * - activity (default): all the public posts
2167          * - posts: all the public top-level posts
2168          * - comments: all the public replies
2169          *
2170          * Updates the provided last_update parameter if the result comes from the
2171          * cache or it is empty
2172          *
2173          * @param string  $owner_nick  Nickname of the feed owner
2174          * @param string  $last_update Date of the last update
2175          * @param integer $max_items   Number of maximum items to fetch
2176          * @param string  $filter      Feed items filter (activity, posts or comments)
2177          * @param boolean $nocache     Wether to bypass caching
2178          * @param boolean $feed_mode   Behave like a regular feed for users if true
2179          *
2180          * @return string XML feed
2181          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2182          * @throws \ImagickException
2183          */
2184         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false, $feed_mode = false)
2185         {
2186                 $stamp = microtime(true);
2187
2188                 $owner = User::getOwnerDataByNick($owner_nick);
2189                 if (!$owner) {
2190                         return;
2191                 }
2192
2193                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2194
2195                 $previous_created = $last_update;
2196
2197                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2198                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2199                         $result = DI::cache()->get($cachekey);
2200                         if (!$nocache && !is_null($result)) {
2201                                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', Logger::DEBUG);
2202                                 $last_update = $result['last_update'];
2203                                 return $result['feed'];
2204                         }
2205                 }
2206
2207                 if (!strlen($last_update)) {
2208                         $last_update = 'now -30 days';
2209                 }
2210
2211                 $check_date = DateTimeFormat::utc($last_update);
2212                 $authorid = Contact::getIdForURL($owner["url"], 0, true);
2213
2214                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted`
2215                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2216                         $owner["uid"], $check_date, Item::PRIVATE, Protocol::OSTATUS, Protocol::DFRN];
2217
2218                 if ($filter === 'comments') {
2219                         $condition[0] .= " AND `object-type` = ? ";
2220                         $condition[] = Activity\ObjectType::COMMENT;
2221                 }
2222
2223                 if ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2224                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2225                         $condition[] = $owner["id"];
2226                         $condition[] = $authorid;
2227                 }
2228
2229                 $params = ['order' => ['received' => true], 'limit' => $max_items];
2230
2231                 if ($filter === 'posts') {
2232                         $ret = Item::selectThread([], $condition, $params);
2233                 } else {
2234                         $ret = Item::select([], $condition, $params);
2235                 }
2236
2237                 $items = Item::inArray($ret);
2238
2239                 $doc = new DOMDocument('1.0', 'utf-8');
2240                 $doc->formatOutput = true;
2241
2242                 $root = self::addHeader($doc, $owner, $filter, $feed_mode);
2243
2244                 foreach ($items as $item) {
2245                         if (DI::config()->get('system', 'ostatus_debug')) {
2246                                 $item['body'] .= '🍼';
2247                         }
2248
2249                         $entry = self::entry($doc, $item, $owner, false, $feed_mode);
2250                         $root->appendChild($entry);
2251
2252                         if ($last_update < $item['created']) {
2253                                 $last_update = $item['created'];
2254                         }
2255                 }
2256
2257                 $feeddata = trim($doc->saveXML());
2258
2259                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2260                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
2261
2262                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, Logger::DEBUG);
2263
2264                 return $feeddata;
2265         }
2266
2267         /**
2268          * Creates the XML for a salmon message
2269          *
2270          * @param array $item  Data of the item that is to be posted
2271          * @param array $owner Contact data of the poster
2272          *
2273          * @return string XML for the salmon
2274          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2275          * @throws \ImagickException
2276          */
2277         public static function salmon(array $item, array $owner)
2278         {
2279                 $doc = new DOMDocument('1.0', 'utf-8');
2280                 $doc->formatOutput = true;
2281
2282                 if (DI::config()->get('system', 'ostatus_debug')) {
2283                         $item['body'] .= '🐟';
2284                 }
2285
2286                 $entry = self::entry($doc, $item, $owner, true);
2287
2288                 $doc->appendChild($entry);
2289
2290                 return trim($doc->saveXML());
2291         }
2292
2293         /**
2294          * Checks if the given contact url does support OStatus
2295          *
2296          * @param string  $url    profile url
2297          * @param boolean $update Update the profile
2298          * @return boolean
2299          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2300          * @throws \ImagickException
2301          */
2302         public static function isSupportedByContactUrl($url, $update = false)
2303         {
2304                 $probe = Probe::uri($url, Protocol::OSTATUS, 0, !$update);
2305                 return $probe['network'] == Protocol::OSTATUS;
2306         }
2307 }