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\ItemURI;
  39 use Friendica\Model\Tag;
  40 use Friendica\Model\User;
  41 use Friendica\Network\Probe;
  42 use Friendica\Util\DateTimeFormat;
  43 use Friendica\Util\Images;
  44 use Friendica\Util\Network;
  45 use Friendica\Util\Proxy as ProxyUtils;
  46 use Friendica\Util\Strings;
  47 use Friendica\Util\XML;
  48
  49 require_once 'mod/share.php';
  50 require_once 'include/api.php';
  51
  52 /**
  53  * This class contain functions for the OStatus protocol
  54  */
  55 class OStatus
  56 {
  57         private static $itemlist;
  58         private static $conv_list = [];
  59
  60         /**
  61          * Fetches author data
  62          *
  63          * @param DOMXPath $xpath     The xpath object
  64          * @param object   $context   The xml context of the author details
  65          * @param array    $importer  user record of the importing user
  66          * @param array    $contact   Called by reference, will contain the fetched contact
  67          * @param bool     $onlyfetch Only fetch the header without updating the contact entries
  68          *
  69          * @return array Array of author related entries for the item
  70          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  71          * @throws \ImagickException
  72          */
  73         private static function fetchAuthor(DOMXPath $xpath, $context, array $importer, array &$contact = null, $onlyfetch)
  74         {
  75                 $author = [];
  76                 $author["author-link"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
  77                 $author["author-name"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $context);
  78                 $addr = XML::getFirstNodeValue($xpath, 'atom:author/atom:email/text()', $context);
  79
  80                 $aliaslink = $author["author-link"];
  81
  82                 $alternate_item = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0);
  83                 if (is_object($alternate_item)) {
  84                         foreach ($alternate_item->attributes as $attributes) {
  85                                 if (($attributes->name == "href") && ($attributes->textContent != "")) {
  86                                         $author["author-link"] = $attributes->textContent;
  87                                 }
  88                         }
  89                 }
  90                 $author["author-id"] = Contact::getIdForURL($author["author-link"]);
  91
  92                 $author['contact-id'] = ($contact['id'] ?? 0) ?: $author['author-id'];
  93
  94                 $contact = [];
  95
  96 /*
  97                 This here would be better, but we would get problems with contacts from the statusnet addon
  98                 This is kept here as a reminder for the future
  99
 100                 $cid = Contact::getIdForURL($author["author-link"], $importer["uid"]);
 101                 if ($cid) {
 102                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
 103                 }
 104 */
 105                 if ($aliaslink != '') {
 106                         $condition = ["`uid` = ? AND `alias` = ? AND `network` != ? AND `rel` IN (?, ?)",
 107                                         $importer["uid"], $aliaslink, Protocol::STATUSNET,
 108                                         Contact::SHARING, Contact::FRIEND];
 109                         $contact = DBA::selectFirst('contact', [], $condition);
 110                 }
 111
 112                 if (!DBA::isResult($contact) && $author["author-link"] != '') {
 113                         if ($aliaslink == "") {
 114                                 $aliaslink = $author["author-link"];
 115                         }
 116
 117                         $condition = ["`uid` = ? AND `nurl` IN (?, ?) AND `network` != ? AND `rel` IN (?, ?)",
 118                                         $importer["uid"], Strings::normaliseLink($author["author-link"]), Strings::normaliseLink($aliaslink),
 119                                         Protocol::STATUSNET, Contact::SHARING, Contact::FRIEND];
 120                         $contact = DBA::selectFirst('contact', [], $condition);
 121                 }
 122
 123                 if (!DBA::isResult($contact) && ($addr != '')) {
 124                         $condition = ["`uid` = ? AND `addr` = ? AND `network` != ? AND `rel` IN (?, ?)",
 125                                         $importer["uid"], $addr, Protocol::STATUSNET,
 126                                         Contact::SHARING, Contact::FRIEND];
 127                         $contact = DBA::selectFirst('contact', [], $condition);
 128                 }
 129
 130                 if (DBA::isResult($contact)) {
 131                         if ($contact['blocked']) {
 132                                 $contact['id'] = -1;
 133                         } elseif (!empty(APContact::getByURL($contact['url'], false))) {
 134                                 ActivityPub\Receiver::switchContact($contact['id'], $importer['uid'], $contact['url']);
 135                         }
 136                         $author["contact-id"] = $contact["id"];
 137                 }
 138
 139                 $avatarlist = [];
 140                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 141                 foreach ($avatars as $avatar) {
 142                         $href = "";
 143                         $width = 0;
 144                         foreach ($avatar->attributes as $attributes) {
 145                                 if ($attributes->name == "href") {
 146                                         $href = $attributes->textContent;
 147                                 }
 148                                 if ($attributes->name == "width") {
 149                                         $width = $attributes->textContent;
 150                                 }
 151                         }
 152                         if ($href != "") {
 153                                 $avatarlist[$width] = $href;
 154                         }
 155                 }
 156                 if (count($avatarlist) > 0) {
 157                         krsort($avatarlist);
 158                         $author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 159                 }
 160
 161                 $displayname = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 162                 if ($displayname != "") {
 163                         $author["author-name"] = $displayname;
 164                 }
 165
 166                 $author["owner-id"] = $author["author-id"];
 167
 168                 // Only update the contacts if it is an OStatus contact
 169                 if (DBA::isResult($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact["network"] == Protocol::OSTATUS)) {
 170
 171                         // Update contact data
 172                         $current = $contact;
 173                         unset($current['name-date']);
 174
 175                         // This query doesn't seem to work
 176                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 177                         // if ($value != "")
 178                         //      $contact["notify"] = $value;
 179
 180                         // This query doesn't seem to work as well - I hate these queries
 181                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 182                         // if ($value != "")
 183                         //      $contact["poll"] = $value;
 184
 185                         $contact['url'] = $author["author-link"];
 186                         $contact['nurl'] = Strings::normaliseLink($contact['url']);
 187
 188                         $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
 189                         if ($value != "") {
 190                                 $contact["alias"] = $value;
 191                         }
 192
 193                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 194                         if ($value != "") {
 195                                 $contact["name"] = $value;
 196                         }
 197
 198                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 199                         if ($value != "") {
 200                                 $contact["nick"] = $value;
 201                         }
 202
 203                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()', $context);
 204                         if ($value != "") {
 205                                 $contact["about"] = HTML::toBBCode($value);
 206                         }
 207
 208                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()', $context);
 209                         if ($value != "") {
 210                                 $contact["location"] = $value;
 211                         }
 212
 213                         $contact['name-date'] = DateTimeFormat::utcNow();
 214
 215                         DBA::update('contact', $contact, ['id' => $contact["id"]], $current);
 216
 217                         if (!empty($author["author-avatar"]) && ($author["author-avatar"] != $current['avatar'])) {
 218                                 Logger::log("Update profile picture for contact ".$contact["id"], Logger::DEBUG);
 219                                 Contact::updateAvatar($author["author-avatar"], $importer["uid"], $contact["id"]);
 220                         }
 221
 222                         // Ensure that we are having this contact (with uid=0)
 223                         $cid = Contact::getIdForURL($aliaslink, 0, true);
 224
 225                         if ($cid) {
 226                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 227                                 $old_contact = DBA::selectFirst('contact', $fields, ['id' => $cid]);
 228
 229                                 // Update it with the current values
 230                                 $fields = ['url' => $author["author-link"], 'name' => $contact["name"],
 231                                                 'nurl' => Strings::normaliseLink($author["author-link"]),
 232                                                 'nick' => $contact["nick"], 'alias' => $contact["alias"],
 233                                                 'about' => $contact["about"], 'location' => $contact["location"],
 234                                                 'success_update' => DateTimeFormat::utcNow(), 'last-update' => DateTimeFormat::utcNow()];
 235
 236                                 DBA::update('contact', $fields, ['id' => $cid], $old_contact);
 237
 238                                 // Update the avatar
 239                                 if (!empty($author["author-avatar"])) {
 240                                         Contact::updateAvatar($author["author-avatar"], 0, $cid);
 241                                 }
 242                         }
 243
 244                         $contact["generation"] = 2;
 245                         $contact["hide"] = false; // OStatus contacts are never hidden
 246                         if (!empty($author["author-avatar"])) {
 247                                 $contact["photo"] = $author["author-avatar"];
 248                         }
 249                         $gcid = GContact::update($contact);
 250
 251                         GContact::link($gcid, $contact["uid"], $contact["id"]);
 252                 } elseif (empty($contact["network"]) || ($contact["network"] != Protocol::DFRN)) {
 253                         $contact = [];
 254                 }
 255
 256                 return $author;
 257         }
 258
 259         /**
 260          * Fetches author data from a given XML string
 261          *
 262          * @param string $xml      The XML
 263          * @param array  $importer user record of the importing user
 264          *
 265          * @return array Array of author related entries for the item
 266          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 267          * @throws \ImagickException
 268          */
 269         public static function salmonAuthor($xml, array $importer)
 270         {
 271                 if ($xml == "") {
 272                         return;
 273                 }
 274
 275                 $doc = new DOMDocument();
 276                 @$doc->loadXML($xml);
 277
 278                 $xpath = new DOMXPath($doc);
 279                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 280                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 281                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 282                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 283                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 284                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 285                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 286                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 287
 288                 $contact = ["id" => 0];
 289
 290                 // Fetch the first author
 291                 $authordata = $xpath->query('//author')->item(0);
 292                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, true);
 293                 return $author;
 294         }
 295
 296         /**
 297          * Read attributes from element
 298          *
 299          * @param object $element Element object
 300          *
 301          * @return array attributes
 302          */
 303         private static function readAttributes($element)
 304         {
 305                 $attribute = [];
 306
 307                 foreach ($element->attributes as $attributes) {
 308                         $attribute[$attributes->name] = $attributes->textContent;
 309                 }
 310
 311                 return $attribute;
 312         }
 313
 314         /**
 315          * Imports an XML string containing OStatus elements
 316          *
 317          * @param string $xml      The XML
 318          * @param array  $importer user record of the importing user
 319          * @param array  $contact  contact
 320          * @param string $hub      Called by reference, returns the fetched hub data
 321          * @return void
 322          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 323          * @throws \ImagickException
 324          */
 325         public static function import($xml, array $importer, array &$contact, &$hub)
 326         {
 327                 self::process($xml, $importer, $contact, $hub);
 328         }
 329
 330         /**
 331          * Internal feed processing
 332          *
 333          * @param string  $xml        The XML
 334          * @param array   $importer   user record of the importing user
 335          * @param array   $contact    contact
 336          * @param string  $hub        Called by reference, returns the fetched hub data
 337          * @param boolean $stored     Is the post fresh imported or from the database?
 338          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 339          *
 340          * @return boolean Could the XML be processed?
 341          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 342          * @throws \ImagickException
 343          */
 344         private static function process($xml, array $importer, array &$contact = null, &$hub, $stored = false, $initialize = true)
 345         {
 346                 if ($initialize) {
 347                         self::$itemlist = [];
 348                         self::$conv_list = [];
 349                 }
 350
 351                 Logger::log('Import OStatus message for user ' . $importer['uid'], Logger::DEBUG);
 352
 353                 if ($xml == "") {
 354                         return false;
 355                 }
 356                 $doc = new DOMDocument();
 357                 @$doc->loadXML($xml);
 358
 359                 $xpath = new DOMXPath($doc);
 360                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 361                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 362                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 363                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 364                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 365                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 366                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 367                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 368
 369                 $hub = "";
 370                 $hub_items = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0);
 371                 if (is_object($hub_items)) {
 372                         $hub_attributes = $hub_items->attributes;
 373                         if (is_object($hub_attributes)) {
 374                                 foreach ($hub_attributes as $hub_attribute) {
 375                                         if ($hub_attribute->name == "href") {
 376                                                 $hub = $hub_attribute->textContent;
 377                                                 Logger::log("Found hub ".$hub, Logger::DEBUG);
 378                                         }
 379                                 }
 380                         }
 381                 }
 382
 383                 $header = [];
 384                 $header["uid"] = $importer["uid"];
 385                 $header["network"] = Protocol::OSTATUS;
 386                 $header["wall"] = 0;
 387                 $header["origin"] = 0;
 388                 $header["gravity"] = GRAVITY_COMMENT;
 389
 390                 if (!is_object($doc->firstChild) || empty($doc->firstChild->tagName)) {
 391                         return false;
 392                 }
 393
 394                 $first_child = $doc->firstChild->tagName;
 395
 396                 if ($first_child == "feed") {
 397                         $entries = $xpath->query('/atom:feed/atom:entry');
 398                 } else {
 399                         $entries = $xpath->query('/atom:entry');
 400                 }
 401
 402                 if ($entries->length == 1) {
 403                         // We reformat the XML to make it better readable
 404                         $doc2 = new DOMDocument();
 405                         $doc2->loadXML($xml);
 406                         $doc2->preserveWhiteSpace = false;
 407                         $doc2->formatOutput = true;
 408                         $xml2 = $doc2->saveXML();
 409
 410                         $header["protocol"] = Conversation::PARCEL_SALMON;
 411                         $header["source"] = $xml2;
 412                 } elseif (!$initialize) {
 413                         return false;
 414                 }
 415
 416                 // Fetch the first author
 417                 $authordata = $xpath->query('//author')->item(0);
 418                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 419
 420                 // Reverse the order of the entries
 421                 $entrylist = [];
 422
 423                 foreach ($entries as $entry) {
 424                         $entrylist[] = $entry;
 425                 }
 426
 427                 foreach (array_reverse($entrylist) as $entry) {
 428                         // fetch the author
 429                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 430
 431                         if ($authorelement->length == 0) {
 432                                 $authorelement = $xpath->query('atom:author', $entry);
 433                         }
 434
 435                         if ($authorelement->length > 0) {
 436                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 437                         }
 438
 439                         $item = array_merge($header, $author);
 440
 441                         $item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 442                         $item['uri-id'] = ItemURI::insert(['uri' => $item['uri']]);
 443
 444                         $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
 445
 446                         // Delete a message
 447                         if (in_array($item["verb"], ['qvitter-delete-notice', Activity::DELETE, 'delete'])) {
 448                                 self::deleteNotice($item);
 449                                 continue;
 450                         }
 451
 452                         if (in_array($item["verb"], [Activity::O_UNFAVOURITE, Activity::UNFAVORITE])) {
 453                                 // Ignore "Unfavorite" message
 454                                 Logger::log("Ignore unfavorite message ".print_r($item, true), Logger::DEBUG);
 455                                 continue;
 456                         }
 457
 458                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 459                         if (Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]])) {
 460                                 Logger::log('Post with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 461                                 continue;
 462                         } else {
 463                                 Logger::log('Processing post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 464                         }
 465
 466                         if ($item["verb"] == Activity::JOIN) {
 467                                 // ignore "Join" messages
 468                                 Logger::log("Ignore join message ".print_r($item, true), Logger::DEBUG);
 469                                 continue;
 470                         }
 471
 472                         if ($item["verb"] == "http://mastodon.social/schema/1.0/block") {
 473                                 // ignore mastodon "block" messages
 474                                 Logger::log("Ignore block message ".print_r($item, true), Logger::DEBUG);
 475                                 continue;
 476                         }
 477
 478                         if ($item["verb"] == Activity::FOLLOW) {
 479                                 Contact::addRelationship($importer, $contact, $item);
 480                                 continue;
 481                         }
 482
 483                         if ($item["verb"] == Activity::O_UNFOLLOW) {
 484                                 $dummy = null;
 485                                 Contact::removeFollower($importer, $contact, $item, $dummy);
 486                                 continue;
 487                         }
 488
 489                         if ($item["verb"] == Activity::FAVORITE) {
 490                                 $orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
 491                                 Logger::log("Favorite ".$orig_uri." ".print_r($item, true));
 492
 493                                 $item["verb"] = Activity::LIKE;
 494                                 $item["parent-uri"] = $orig_uri;
 495                                 $item["gravity"] = GRAVITY_ACTIVITY;
 496                                 $item["object-type"] = Activity\ObjectType::NOTE;
 497                         }
 498
 499                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 500                         if (!in_array($item["verb"], [Activity::POST, Activity::LIKE, Activity::SHARE])) {
 501                                 Logger::log("Unhandled verb ".$item["verb"]." ".print_r($item, true), Logger::DEBUG);
 502                         }
 503
 504                         self::processPost($xpath, $entry, $item, $importer);
 505
 506                         if ($initialize && (count(self::$itemlist) > 0)) {
 507                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri']) {
 508                                         // We will import it everytime, when it is started by our contacts
 509                                         $valid = Contact::isSharingByURL(self::$itemlist[0]['author-link'], self::$itemlist[0]['uid']);
 510
 511                                         if (!$valid) {
 512                                                 // If not, then it depends on this setting
 513                                                 $valid = ((self::$itemlist[0]['uid'] == 0) || !DI::pConfig()->get(self::$itemlist[0]['uid'], 'system', 'accept_only_sharer', false));
 514                                                 if ($valid) {
 515                                                         Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported due to the system settings.", Logger::DEBUG);
 516                                                 }
 517                                         } else {
 518                                                 Logger::log("Item with uri ".self::$itemlist[0]['uri']." belongs to a contact (".self::$itemlist[0]['contact-id']."). It will be imported.", Logger::DEBUG);
 519                                         }
 520                                         if ($valid) {
 521                                                 // Never post a thread when the only interaction by our contact was a like
 522                                                 $valid = false;
 523                                                 $verbs = [Activity::POST, Activity::SHARE];
 524                                                 foreach (self::$itemlist as $item) {
 525                                                         if (in_array($item['verb'], $verbs) && Contact::isSharingByURL($item['author-link'], $item['uid'])) {
 526                                                                 $valid = true;
 527                                                         }
 528                                                 }
 529                                                 if ($valid) {
 530                                                         Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported since the thread contains posts or shares.", Logger::DEBUG);
 531                                                 }
 532                                         }
 533                                 } else {
 534                                         // But we will only import complete threads
 535                                         $valid = Item::exists(['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
 536                                         if ($valid) {
 537                                                 Logger::log("Item with uri ".self::$itemlist[0]["uri"]." belongs to parent ".self::$itemlist[0]['parent-uri']." of user ".$importer["uid"].". It will be imported.", Logger::DEBUG);
 538                                         }
 539                                 }
 540
 541                                 if ($valid) {
 542                                         $default_contact = 0;
 543                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 544                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 545                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 546                                                 } else {
 547                                                         $default_contact = $item['contact-id'];
 548                                                 }
 549                                         }
 550                                         foreach (self::$itemlist as $item) {
 551                                                 $found = Item::exists(['uid' => $importer["uid"], 'uri' => $item["uri"]]);
 552                                                 if ($found) {
 553                                                         Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", Logger::DEBUG);
 554                                                 } elseif ($item['contact-id'] < 0) {
 555                                                         Logger::log("Item with uri ".$item["uri"]." is from a blocked contact.", Logger::DEBUG);
 556                                                 } else {
 557                                                         // We are having duplicated entries. Hopefully this solves it.
 558                                                         if (DI::lock()->acquire('ostatus_process_item_insert')) {
 559                                                                 $ret = Item::insert($item);
 560                                                                 DI::lock()->release('ostatus_process_item_insert');
 561                                                                 Logger::log("Item with uri ".$item["uri"]." for user ".$importer["uid"].' stored. Return value: '.$ret);
 562                                                         } else {
 563                                                                 $ret = Item::insert($item);
 564                                                                 Logger::log("We couldn't lock - but tried to store the item anyway. Return value is ".$ret);
 565                                                         }
 566                                                 }
 567                                         }
 568                                 }
 569                                 self::$itemlist = [];
 570                         }
 571                         Logger::log('Processing done for post with URI '.$item["uri"].' for user '.$importer["uid"].'.', Logger::DEBUG);
 572                 }
 573                 return true;
 574         }
 575
 576         /**
 577          * Removes notice item from database
 578          *
 579          * @param array $item item
 580          * @return void
 581          * @throws \Exception
 582          */
 583         private static function deleteNotice(array $item)
 584         {
 585                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'uri' => $item['uri']];
 586                 if (!Item::exists($condition)) {
 587                         Logger::log('Item from '.$item['author-link'].' with uri '.$item['uri'].' for user '.$item['uid']." wasn't found. We don't delete it.");
 588                         return;
 589                 }
 590
 591                 Item::markForDeletion($condition);
 592
 593                 Logger::log('Deleted item with uri '.$item['uri'].' for user '.$item['uid']);
 594         }
 595
 596         /**
 597          * Processes the XML for a post
 598          *
 599          * @param DOMXPath $xpath    The xpath object
 600          * @param object   $entry    The xml entry that is processed
 601          * @param array    $item     The item array
 602          * @param array    $importer user record of the importing user
 603          * @return void
 604          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 605          * @throws \ImagickException
 606          */
 607         private static function processPost(DOMXPath $xpath, $entry, array &$item, array $importer)
 608         {
 609                 $item["body"] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 610                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 611                 if (($item["object-type"] == Activity\ObjectType::BOOKMARK) || ($item["object-type"] == Activity\ObjectType::EVENT)) {
 612                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 613                         $item["body"] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 614                 } elseif ($item["object-type"] == Activity\ObjectType::QUESTION) {
 615                         $item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 616                 }
 617
 618                 $item["created"] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 619                 $item["edited"] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 620                 $item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 621
 622                 $conv = $xpath->query('ostatus:conversation', $entry);
 623                 if (is_object($conv->item(0))) {
 624                         foreach ($conv->item(0)->attributes as $attributes) {
 625                                 if ($attributes->name == "ref") {
 626                                         $item['conversation-uri'] = $attributes->textContent;
 627                                 }
 628                                 if ($attributes->name == "href") {
 629                                         $item['conversation-href'] = $attributes->textContent;
 630                                 }
 631                         }
 632                 }
 633
 634                 $related = "";
 635
 636                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 637                 if (is_object($inreplyto->item(0))) {
 638                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 639                                 if ($attributes->name == "ref") {
 640                                         $item["parent-uri"] = $attributes->textContent;
 641                                 }
 642                                 if ($attributes->name == "href") {
 643                                         $related = $attributes->textContent;
 644                                 }
 645                         }
 646                 }
 647
 648                 $georsspoint = $xpath->query('georss:point', $entry);
 649                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 650                         $item["coord"] = $georsspoint->item(0)->nodeValue;
 651                 }
 652
 653                 $categories = $xpath->query('atom:category', $entry);
 654                 if ($categories) {
 655                         foreach ($categories as $category) {
 656                                 foreach ($category->attributes as $attributes) {
 657                                         if ($attributes->name == 'term') {
 658                                                 $term = $attributes->textContent;
 659                                                 if (!empty($item['tag'])) {
 660                                                         $item['tag'] .= ',';
 661                                                 } else {
 662                                                         $item['tag'] = '';
 663                                                 }
 664
 665                                                 $item['tag'] .= '#[url=' . DI::baseUrl() . '/search?tag=' . $term . ']' . $term . '[/url]';
 666
 667                                                 // Store the hashtag
 668                                                 Tag::store($item['uri-id'], Tag::HASHTAG, $term);
 669                                         }
 670                                 }
 671                         }
 672                 }
 673
 674                 $self = '';
 675                 $add_body = '';
 676
 677                 $links = $xpath->query('atom:link', $entry);
 678                 if ($links) {
 679                         $link_data = self::processLinks($links, $item);
 680                         $self = $link_data['self'];
 681                         $add_body = $link_data['add_body'];
 682                 }
 683
 684                 $repeat_of = "";
 685
 686                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 687                 if ($notice_info && ($notice_info->length > 0)) {
 688                         foreach ($notice_info->item(0)->attributes as $attributes) {
 689                                 if ($attributes->name == "source") {
 690                                         $item["app"] = strip_tags($attributes->textContent);
 691                                 }
 692                                 if ($attributes->name == "repeat_of") {
 693                                         $repeat_of = $attributes->textContent;
 694                                 }
 695                         }
 696                 }
 697                 // Is it a repeated post?
 698                 if (($repeat_of != "") || ($item["verb"] == Activity::SHARE)) {
 699                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 700                         if (!empty($link_data['add_body'])) {
 701                                 $add_body .= $link_data['add_body'];
 702                         }
 703                 }
 704
 705                 $item["body"] .= $add_body;
 706
 707                 // Only add additional data when there is no picture in the post
 708                 if (!strstr($item["body"], '[/img]')) {
 709                         $item["body"] = add_page_info_to_body($item["body"]);
 710                 }
 711
 712                 // Mastodon Content Warning
 713                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 714                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 715                         if (!empty($clear_text)) {
 716                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 717                         }
 718                 }
 719
 720                 if (($self != '') && empty($item['protocol'])) {
 721                         self::fetchSelf($self, $item);
 722                 }
 723
 724                 if (!empty($item["conversation-href"])) {
 725                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 726                 }
 727
 728                 if (isset($item["parent-uri"])) {
 729                         if (!Item::exists(['uid' => $importer["uid"], 'uri' => $item['parent-uri']])) {
 730                                 if ($related != '') {
 731                                         self::fetchRelated($related, $item["parent-uri"], $importer);
 732                                 }
 733                         } else {
 734                                 Logger::log('Reply with URI '.$item["uri"].' already existed for user '.$importer["uid"].'.', Logger::DEBUG);
 735                         }
 736                 } else {
 737                         $item["parent-uri"] = $item["uri"];
 738                         $item["gravity"] = GRAVITY_PARENT;
 739                 }
 740
 741                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 742                         $item = Conversation::insert($item);
 743                 }
 744
 745                 self::$itemlist[] = $item;
 746         }
 747
 748         /**
 749          * Fetch the conversation for posts
 750          *
 751          * @param string $conversation     The link to the conversation
 752          * @param string $conversation_uri The conversation in "uri" format
 753          * @return void
 754          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 755          */
 756         private static function fetchConversation($conversation, $conversation_uri)
 757         {
 758                 // Ensure that we only store a conversation once in a process
 759                 if (isset(self::$conv_list[$conversation])) {
 760                         return;
 761                 }
 762
 763                 self::$conv_list[$conversation] = true;
 764
 765                 $curlResult = Network::curl($conversation, false, ['accept_content' => 'application/atom+xml, text/html']);
 766
 767                 if (!$curlResult->isSuccess()) {
 768                         return;
 769                 }
 770
 771                 $xml = '';
 772
 773                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 774                         $xml = $curlResult->getBody();
 775                 }
 776
 777                 if ($xml == '') {
 778                         $doc = new DOMDocument();
 779                         if (!@$doc->loadHTML($curlResult->getBody())) {
 780                                 return;
 781                         }
 782                         $xpath = new DOMXPath($doc);
 783
 784                         $links = $xpath->query('//link');
 785                         if ($links) {
 786                                 $file = '';
 787                                 foreach ($links as $link) {
 788                                         $attribute = self::readAttributes($link);
 789                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 790                                                 $file = $attribute['href'];
 791                                         }
 792                                 }
 793                                 if ($file != '') {
 794                                         $conversation_atom = Network::curl($attribute['href']);
 795
 796                                         if ($conversation_atom->isSuccess()) {
 797                                                 $xml = $conversation_atom->getBody();
 798                                         }
 799                                 }
 800                         }
 801                 }
 802
 803                 if ($xml == '') {
 804                         return;
 805                 }
 806
 807                 self::storeConversation($xml, $conversation, $conversation_uri);
 808         }
 809
 810         /**
 811          * Store a feed in several conversation entries
 812          *
 813          * @param string $xml              The feed
 814          * @param string $conversation     conversation
 815          * @param string $conversation_uri conversation uri
 816          * @return void
 817          * @throws \Exception
 818          */
 819         private static function storeConversation($xml, $conversation = '', $conversation_uri = '')
 820         {
 821                 $doc = new DOMDocument();
 822                 @$doc->loadXML($xml);
 823
 824                 $xpath = new DOMXPath($doc);
 825                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 826                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 827                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 828
 829                 $entries = $xpath->query('/atom:feed/atom:entry');
 830
 831                 // Now store the entries
 832                 foreach ($entries as $entry) {
 833                         $doc2 = new DOMDocument();
 834                         $doc2->preserveWhiteSpace = false;
 835                         $doc2->formatOutput = true;
 836
 837                         $conv_data = [];
 838
 839                         $conv_data['protocol'] = Conversation::PARCEL_SPLIT_CONVERSATION;
 840                         $conv_data['network'] = Protocol::OSTATUS;
 841                         $conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 842
 843                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 844                         if (is_object($inreplyto->item(0))) {
 845                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 846                                         if ($attributes->name == "ref") {
 847                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 848                                         }
 849                                 }
 850                         }
 851
 852                         $conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 853
 854                         $conv = $xpath->query('ostatus:conversation', $entry);
 855                         if (is_object($conv->item(0))) {
 856                                 foreach ($conv->item(0)->attributes as $attributes) {
 857                                         if ($attributes->name == "ref") {
 858                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 859                                         }
 860                                         if ($attributes->name == "href") {
 861                                                 $conv_data['conversation-href'] = $attributes->textContent;
 862                                         }
 863                                 }
 864                         }
 865
 866                         if ($conversation != '') {
 867                                 $conv_data['conversation-uri'] = $conversation;
 868                         }
 869
 870                         if ($conversation_uri != '') {
 871                                 $conv_data['conversation-uri'] = $conversation_uri;
 872                         }
 873
 874                         $entry = $doc2->importNode($entry, true);
 875
 876                         $doc2->appendChild($entry);
 877
 878                         $conv_data['source'] = $doc2->saveXML();
 879
 880                         $condition = ['item-uri' => $conv_data['uri'],'protocol' => Conversation::PARCEL_FEED];
 881                         if (DBA::exists('conversation', $condition)) {
 882                                 Logger::log('Delete deprecated entry for URI '.$conv_data['uri'], Logger::DEBUG);
 883                                 DBA::delete('conversation', ['item-uri' => $conv_data['uri']]);
 884                         }
 885
 886                         Logger::log('Store conversation data for uri '.$conv_data['uri'], Logger::DEBUG);
 887                         Conversation::insert($conv_data);
 888                 }
 889         }
 890
 891         /**
 892          * Fetch the own post so that it can be stored later
 893          *
 894          * We want to store the original data for later processing.
 895          * This function is meant for cases where we process a feed with multiple entries.
 896          * In that case we need to fetch the single posts here.
 897          *
 898          * @param string $self The link to the self item
 899          * @param array  $item The item array
 900          * @return void
 901          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 902          */
 903         private static function fetchSelf($self, array &$item)
 904         {
 905                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $self, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 906                 if (DBA::exists('conversation', $condition)) {
 907                         Logger::log('Conversation '.$item['uri'].' is already stored.', Logger::DEBUG);
 908                         return;
 909                 }
 910
 911                 $curlResult = Network::curl($self);
 912
 913                 if (!$curlResult->isSuccess()) {
 914                         return;
 915                 }
 916
 917                 // We reformat the XML to make it better readable
 918                 $doc = new DOMDocument();
 919                 $doc->loadXML($curlResult->getBody());
 920                 $doc->preserveWhiteSpace = false;
 921                 $doc->formatOutput = true;
 922                 $xml = $doc->saveXML();
 923
 924                 $item["protocol"] = Conversation::PARCEL_SALMON;
 925                 $item["source"] = $xml;
 926
 927                 Logger::log('Conversation '.$item['uri'].' is now fetched.', Logger::DEBUG);
 928         }
 929
 930         /**
 931          * Fetch related posts and processes them
 932          *
 933          * @param string $related     The link to the related item
 934          * @param string $related_uri The related item in "uri" format
 935          * @param array  $importer    user record of the importing user
 936          * @return void
 937          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 938          * @throws \ImagickException
 939          */
 940         private static function fetchRelated($related, $related_uri, $importer)
 941         {
 942                 $condition = ['`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, Conversation::PARCEL_DFRN, Conversation::PARCEL_SALMON];
 943                 $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 944                 if (DBA::isResult($conversation)) {
 945                         $stored = true;
 946                         $xml = $conversation['source'];
 947                         if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
 948                                 Logger::log('Got valid cached XML for URI '.$related_uri, Logger::DEBUG);
 949                                 return;
 950                         }
 951                         if ($conversation['protocol'] == Conversation::PARCEL_SALMON) {
 952                                 Logger::log('Delete invalid cached XML for URI '.$related_uri, Logger::DEBUG);
 953                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 954                         }
 955                 }
 956
 957                 $stored = false;
 958                 $curlResult = Network::curl($related, false, ['accept_content' => 'application/atom+xml, text/html']);
 959
 960                 if (!$curlResult->isSuccess()) {
 961                         return;
 962                 }
 963
 964                 $xml = '';
 965
 966                 if (stristr($curlResult->getHeader(), 'Content-Type: application/atom+xml')) {
 967                         Logger::log('Directly fetched XML for URI ' . $related_uri, Logger::DEBUG);
 968                         $xml = $curlResult->getBody();
 969                 }
 970
 971                 if ($xml == '') {
 972                         $doc = new DOMDocument();
 973                         if (!@$doc->loadHTML($curlResult->getBody())) {
 974                                 return;
 975                         }
 976                         $xpath = new DOMXPath($doc);
 977
 978                         $atom_file = '';
 979
 980                         $links = $xpath->query('//link');
 981                         if ($links) {
 982                                 foreach ($links as $link) {
 983                                         $attribute = self::readAttributes($link);
 984                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 985                                                 $atom_file = $attribute['href'];
 986                                         }
 987                                 }
 988                                 if ($atom_file != '') {
 989                                         $curlResult = Network::curl($atom_file);
 990
 991                                         if ($curlResult->isSuccess()) {
 992                                                 Logger::log('Fetched XML for URI ' . $related_uri, Logger::DEBUG);
 993                                                 $xml = $curlResult->getBody();
 994                                         }
 995                                 }
 996                         }
 997                 }
 998
 999                 // Workaround for older GNU Social servers
1000                 if (($xml == '') && strstr($related, '/notice/')) {
1001                         $curlResult = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related).'.atom');
1002
1003                         if ($curlResult->isSuccess()) {
1004                                 Logger::log('GNU Social workaround to fetch XML for URI ' . $related_uri, Logger::DEBUG);
1005                                 $xml = $curlResult->getBody();
1006                         }
1007                 }
1008
1009                 // Even more worse workaround for GNU Social ;-)
1010                 if ($xml == '') {
1011                         $related_guess = OStatus::convertHref($related_uri);
1012                         $curlResult = Network::curl(str_replace('/notice/', '/api/statuses/show/', $related_guess).'.atom');
1013
1014                         if ($curlResult->isSuccess()) {
1015                                 Logger::log('GNU Social workaround 2 to fetch XML for URI ' . $related_uri, Logger::DEBUG);
1016                                 $xml = $curlResult->getBody();
1017                         }
1018                 }
1019
1020                 // Finally we take the data that we fetched from "ostatus:conversation"
1021                 if ($xml == '') {
1022                         $condition = ['item-uri' => $related_uri, 'protocol' => Conversation::PARCEL_SPLIT_CONVERSATION];
1023                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
1024                         if (DBA::isResult($conversation)) {
1025                                 $stored = true;
1026                                 Logger::log('Got cached XML from conversation for URI '.$related_uri, Logger::DEBUG);
1027                                 $xml = $conversation['source'];
1028                         }
1029                 }
1030
1031                 if ($xml != '') {
1032                         self::process($xml, $importer, $contact, $hub, $stored, false);
1033                 } else {
1034                         Logger::log("XML couldn't be fetched for URI: ".$related_uri." - href: ".$related, Logger::DEBUG);
1035                 }
1036                 return;
1037         }
1038
1039         /**
1040          * Processes the XML for a repeated post
1041          *
1042          * @param DOMXPath $xpath    The xpath object
1043          * @param object   $entry    The xml entry that is processed
1044          * @param array    $item     The item array
1045          * @param array    $importer user record of the importing user
1046          *
1047          * @return array with data from links
1048          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1049          * @throws \ImagickException
1050          */
1051         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer)
1052         {
1053                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
1054
1055                 if (!is_object($activityobject)) {
1056                         return [];
1057                 }
1058
1059                 $link_data = [];
1060
1061                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
1062
1063                 $links = $xpath->query("atom:link", $activityobject);
1064                 if ($links) {
1065                         $link_data = self::processLinks($links, $item);
1066                 }
1067
1068                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
1069                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
1070                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
1071
1072                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
1073
1074                 $item["author-name"] = $orig_author["author-name"];
1075                 $item["author-link"] = $orig_author["author-link"];
1076                 $item["author-id"] = $orig_author["author-id"];
1077
1078                 $item["body"] = HTML::toBBCode($orig_body);
1079                 $item["created"] = $orig_created;
1080                 $item["edited"] = $orig_edited;
1081
1082                 $item["uri"] = $orig_uri;
1083
1084                 $item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
1085
1086                 $item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
1087
1088                 // Mastodon Content Warning
1089                 if (($item["verb"] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
1090                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
1091                         if (!empty($clear_text)) {
1092                                 $item['content-warning'] = HTML::toBBCode($clear_text);
1093                         }
1094                 }
1095
1096                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
1097                 if (is_object($inreplyto->item(0))) {
1098                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1099                                 if ($attributes->name == "ref") {
1100                                         $item["parent-uri"] = $attributes->textContent;
1101                                 }
1102                         }
1103                 }
1104
1105                 return $link_data;
1106         }
1107
1108         /**
1109          * Processes links in the XML
1110          *
1111          * @param object $links The xml data that contain links
1112          * @param array  $item  The item array
1113          *
1114          * @return array with data from the links
1115          */
1116         private static function processLinks($links, array &$item)
1117         {
1118                 $link_data = ['add_body' => '', 'self' => ''];
1119
1120                 foreach ($links as $link) {
1121                         $attribute = self::readAttributes($link);
1122
1123                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1124                                 switch ($attribute['rel']) {
1125                                         case "alternate":
1126                                                 $item["plink"] = $attribute['href'];
1127                                                 if (($item["object-type"] == Activity\ObjectType::QUESTION)
1128                                                         || ($item["object-type"] == Activity\ObjectType::EVENT)
1129                                                 ) {
1130                                                         $item["body"] .= add_page_info($attribute['href']);
1131                                                 }
1132                                                 break;
1133                                         case "ostatus:conversation":
1134                                                 $link_data['conversation'] = $attribute['href'];
1135                                                 $item['conversation-href'] = $link_data['conversation'];
1136                                                 if (!isset($item['conversation-uri'])) {
1137                                                         $item['conversation-uri'] = $item['conversation-href'];
1138                                                 }
1139                                                 break;
1140                                         case "enclosure":
1141                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1142                                                 if ($filetype == 'image') {
1143                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1144                                                 } else {
1145                                                         if (!empty($item["attach"])) {
1146                                                                 $item["attach"] .= ',';
1147                                                         } else {
1148                                                                 $item["attach"] = '';
1149                                                         }
1150                                                         if (!isset($attribute['length'])) {
1151                                                                 $attribute['length'] = "0";
1152                                                         }
1153                                                         $item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.($attribute['title'] ?? '') .'"[/attach]';
1154                                                 }
1155                                                 break;
1156                                         case "related":
1157                                                 if ($item["object-type"] != Activity\ObjectType::BOOKMARK) {
1158                                                         if (!isset($item["parent-uri"])) {
1159                                                                 $item["parent-uri"] = $attribute['href'];
1160                                                         }
1161                                                         $link_data['related'] = $attribute['href'];
1162                                                 } else {
1163                                                         $item["body"] .= add_page_info($attribute['href']);
1164                                                 }
1165                                                 break;
1166                                         case "self":
1167                                                 if (empty($item["plink"])) {
1168                                                         $item["plink"] = $attribute['href'];
1169                                                 }
1170                                                 $link_data['self'] = $attribute['href'];
1171                                                 break;
1172                                 }
1173                         }
1174                 }
1175                 return $link_data;
1176         }
1177
1178         /**
1179          * Create an url out of an uri
1180          *
1181          * @param string $href URI in the format "parameter1:parameter1:..."
1182          *
1183          * @return string URL in the format http(s)://....
1184          */
1185         public static function convertHref($href)
1186         {
1187                 $elements = explode(":", $href);
1188
1189                 if ((count($elements) <= 2) || ($elements[0] != "tag")) {
1190                         return $href;
1191                 }
1192
1193                 $server = explode(",", $elements[1]);
1194                 $conversation = explode("=", $elements[2]);
1195
1196                 if ((count($elements) == 4) && ($elements[2] == "post")) {
1197                         return "http://".$server[0]."/notice/".$elements[3];
1198                 }
1199
1200                 if ((count($conversation) != 2) || ($conversation[1] =="")) {
1201                         return $href;
1202                 }
1203                 if ($elements[3] == "objectType=thread") {
1204                         return "http://".$server[0]."/conversation/".$conversation[1];
1205                 } else {
1206                         return "http://".$server[0]."/notice/".$conversation[1];
1207                 }
1208         }
1209
1210         /**
1211          * Checks if the current post is a reshare
1212          *
1213          * @param array $item The item array of thw post
1214          *
1215          * @return string The guid if the post is a reshare
1216          */
1217         private static function getResharedGuid(array $item)
1218         {
1219                 $reshared = Item::getShareArray($item);
1220                 if (empty($reshared['guid']) || !empty($reshared['comment'])) {
1221                         return '';
1222                 }
1223
1224                 return $reshared['guid'];
1225         }
1226
1227         /**
1228          * Cleans the body of a post if it contains picture links
1229          *
1230          * @param string $body The body
1231          *
1232          * @return string The cleaned body
1233          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1234          */
1235         private static function formatPicturePost($body)
1236         {
1237                 $siteinfo = BBCode::getAttachedData($body);
1238
1239                 if (($siteinfo["type"] == "photo") && (!empty($siteinfo["preview"]) || !empty($siteinfo["image"]))) {
1240                         if (isset($siteinfo["preview"])) {
1241                                 $preview = $siteinfo["preview"];
1242                         } else {
1243                                 $preview = $siteinfo["image"];
1244                         }
1245
1246                         // Is it a remote picture? Then make a smaller preview here
1247                         $preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
1248
1249                         // Is it a local picture? Then make it smaller here
1250                         $preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);
1251                         $preview = str_replace(["-1.jpg", "-1.png"], ["-2.jpg", "-2.png"], $preview);
1252
1253                         if (isset($siteinfo["url"])) {
1254                                 $url = $siteinfo["url"];
1255                         } else {
1256                                 $url = $siteinfo["image"];
1257                         }
1258
1259                         $body = trim($siteinfo["text"])." [url]".$url."[/url]\n[img]".$preview."[/img]";
1260                 }
1261
1262                 return $body;
1263         }
1264
1265         /**
1266          * Adds the header elements to the XML document
1267          *
1268          * @param DOMDocument $doc       XML document
1269          * @param array       $owner     Contact data of the poster
1270          * @param string      $filter    The related feed filter (activity, posts or comments)
1271          * @param bool        $feed_mode Behave like a regular feed for users if true
1272          *
1273          * @return object header root element
1274          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1275          */
1276         private static function addHeader(DOMDocument $doc, array $owner, $filter, $feed_mode = false)
1277         {
1278                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
1279                 $doc->appendChild($root);
1280
1281                 $root->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1282                 $root->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1283                 $root->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1284                 $root->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1285                 $root->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1286                 $root->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1287                 $root->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1288                 $root->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1289
1290                 $title = '';
1291                 $selfUri = '/feed/' . $owner["nick"] . '/';
1292                 switch ($filter) {
1293                         case 'activity':
1294                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1295                                 $selfUri .= $filter;
1296                                 break;
1297                         case 'posts':
1298                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1299                                 break;
1300                         case 'comments':
1301                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1302                                 $selfUri .= $filter;
1303                                 break;
1304                 }
1305
1306                 if (!$feed_mode) {
1307                         $selfUri = "/dfrn_poll/" . $owner["nick"];
1308                 }
1309
1310                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
1311                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
1312                 XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
1313                 XML::addElement($doc, $root, "title", $title);
1314                 XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
1315                 XML::addElement($doc, $root, "logo", $owner["photo"]);
1316                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1317
1318                 $author = self::addAuthor($doc, $owner);
1319                 $root->appendChild($author);
1320
1321                 $attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
1322                 XML::addElement($doc, $root, "link", "", $attributes);
1323
1324                 /// @TODO We have to find out what this is
1325                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1326                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1327                 ///             "type" => "application/json");
1328                 /// XML::addElement($doc, $root, "link", "", $attributes);
1329
1330                 self::hublinks($doc, $root, $owner["nick"]);
1331
1332                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "salmon"];
1333                 XML::addElement($doc, $root, "link", "", $attributes);
1334
1335                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-replies"];
1336                 XML::addElement($doc, $root, "link", "", $attributes);
1337
1338                 $attributes = ["href" => DI::baseUrl() . "/salmon/" . $owner["nick"], "rel" => "http://salmon-protocol.org/ns/salmon-mention"];
1339                 XML::addElement($doc, $root, "link", "", $attributes);
1340
1341                 $attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
1342                 XML::addElement($doc, $root, "link", "", $attributes);
1343
1344                 if ($owner['account-type'] == Contact::TYPE_COMMUNITY) {
1345                         $condition = ['uid' => $owner['uid'], 'self' => false, 'pending' => false,
1346                                         'archive' => false, 'hidden' => false, 'blocked' => false];
1347                         $members = DBA::count('contact', $condition);
1348                         XML::addElement($doc, $root, "statusnet:group_info", "", ["member_count" => $members]);
1349                 }
1350
1351                 return $root;
1352         }
1353
1354         /**
1355          * Add the link to the push hubs to the XML document
1356          *
1357          * @param DOMDocument $doc  XML document
1358          * @param object      $root XML root element where the hub links are added
1359          * @param object      $nick nick
1360          * @return void
1361          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1362          */
1363         public static function hublinks(DOMDocument $doc, $root, $nick)
1364         {
1365                 $h = DI::baseUrl() . '/pubsubhubbub/'.$nick;
1366                 XML::addElement($doc, $root, "link", "", ["href" => $h, "rel" => "hub"]);
1367         }
1368
1369         /**
1370          * Adds attachment data to the XML document
1371          *
1372          * @param DOMDocument $doc  XML document
1373          * @param object      $root XML root element where the hub links are added
1374          * @param array       $item Data of the item that is to be posted
1375          * @return void
1376          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1377          */
1378         private static function getAttachment(DOMDocument $doc, $root, $item)
1379         {
1380                 $siteinfo = BBCode::getAttachedData($item["body"]);
1381
1382                 switch ($siteinfo["type"]) {
1383                         case 'photo':
1384                                 if (!empty($siteinfo["image"])) {
1385                                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1386                                         if ($imgdata) {
1387                                                 $attributes = ["rel" => "enclosure",
1388                                                                 "href" => $siteinfo["image"],
1389                                                                 "type" => $imgdata["mime"],
1390                                                                 "length" => intval($imgdata["size"])];
1391                                                 XML::addElement($doc, $root, "link", "", $attributes);
1392                                         }
1393                                 }
1394                                 break;
1395                         case 'video':
1396                                 $attributes = ["rel" => "enclosure",
1397                                                 "href" => $siteinfo["url"],
1398                                                 "type" => "text/html; charset=UTF-8",
1399                                                 "length" => "",
1400                                                 "title" => ($siteinfo["title"] ?? '') ?: $siteinfo["url"],
1401                                 ];
1402                                 XML::addElement($doc, $root, "link", "", $attributes);
1403                                 break;
1404                         default:
1405                                 break;
1406                 }
1407
1408                 if (!DI::config()->get('system', 'ostatus_not_attach_preview') && ($siteinfo["type"] != "photo") && isset($siteinfo["image"])) {
1409                         $imgdata = Images::getInfoFromURLCached($siteinfo["image"]);
1410                         if ($imgdata) {
1411                                 $attributes = ["rel" => "enclosure",
1412                                                 "href" => $siteinfo["image"],
1413                                                 "type" => $imgdata["mime"],
1414                                                 "length" => intval($imgdata["size"])];
1415
1416                                 XML::addElement($doc, $root, "link", "", $attributes);
1417                         }
1418                 }
1419
1420                 $arr = explode('[/attach],', $item['attach']);
1421                 if (count($arr)) {
1422                         foreach ($arr as $r) {
1423                                 $matches = false;
1424                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
1425                                 if ($cnt) {
1426                                         $attributes = ["rel" => "enclosure",
1427                                                         "href" => $matches[1],
1428                                                         "type" => $matches[3]];
1429
1430                                         if (intval($matches[2])) {
1431                                                 $attributes["length"] = intval($matches[2]);
1432                                         }
1433                                         if (trim($matches[4]) != "") {
1434                                                 $attributes["title"] = trim($matches[4]);
1435                                         }
1436                                         XML::addElement($doc, $root, "link", "", $attributes);
1437                                 }
1438                         }
1439                 }
1440         }
1441
1442         /**
1443          * Adds the author element to the XML document
1444          *
1445          * @param DOMDocument $doc          XML document
1446          * @param array       $owner        Contact data of the poster
1447          * @param bool        $show_profile Whether to show profile
1448          *
1449          * @return \DOMElement author element
1450          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1451          */
1452         private static function addAuthor(DOMDocument $doc, array $owner, $show_profile = true)
1453         {
1454                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1455                 $author = $doc->createElement("author");
1456                 XML::addElement($doc, $author, "id", $owner["url"]);
1457                 if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1458                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::GROUP);
1459                 } else {
1460                         XML::addElement($doc, $author, "activity:object-type", Activity\ObjectType::PERSON);
1461                 }
1462                 XML::addElement($doc, $author, "uri", $owner["url"]);
1463                 XML::addElement($doc, $author, "name", $owner["nick"]);
1464                 XML::addElement($doc, $author, "email", $owner["addr"]);
1465                 if ($show_profile) {
1466                         XML::addElement($doc, $author, "summary", BBCode::convert($owner["about"], false, 7));
1467                 }
1468
1469                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $owner["url"]];
1470                 XML::addElement($doc, $author, "link", "", $attributes);
1471
1472                 $attributes = [
1473                                 "rel" => "avatar",
1474                                 "type" => "image/jpeg", // To-Do?
1475                                 "media:width" => 300,
1476                                 "media:height" => 300,
1477                                 "href" => $owner["photo"]];
1478                 XML::addElement($doc, $author, "link", "", $attributes);
1479
1480                 if (isset($owner["thumb"])) {
1481                         $attributes = [
1482                                         "rel" => "avatar",
1483                                         "type" => "image/jpeg", // To-Do?
1484                                         "media:width" => 80,
1485                                         "media:height" => 80,
1486                                         "href" => $owner["thumb"]];
1487                         XML::addElement($doc, $author, "link", "", $attributes);
1488                 }
1489
1490                 XML::addElement($doc, $author, "poco:preferredUsername", $owner["nick"]);
1491                 XML::addElement($doc, $author, "poco:displayName", $owner["name"]);
1492                 if ($show_profile) {
1493                         XML::addElement($doc, $author, "poco:note", BBCode::convert($owner["about"], false, 7));
1494
1495                         if (trim($owner["location"]) != "") {
1496                                 $element = $doc->createElement("poco:address");
1497                                 XML::addElement($doc, $element, "poco:formatted", $owner["location"]);
1498                                 $author->appendChild($element);
1499                         }
1500                 }
1501
1502                 if (DBA::isResult($profile) && !$show_profile) {
1503                         if (trim($profile["homepage"]) != "") {
1504                                 $urls = $doc->createElement("poco:urls");
1505                                 XML::addElement($doc, $urls, "poco:type", "homepage");
1506                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
1507                                 XML::addElement($doc, $urls, "poco:primary", "true");
1508                                 $author->appendChild($urls);
1509                         }
1510
1511                         XML::addElement($doc, $author, "followers", "", ["url" => DI::baseUrl() . "/profile/" . $owner["nick"] . "/contacts/followers"]);
1512                         XML::addElement($doc, $author, "statusnet:profile_info", "", ["local_id" => $owner["uid"]]);
1513
1514                         if ($profile["publish"]) {
1515                                 XML::addElement($doc, $author, "mastodon:scope", "public");
1516                         }
1517                 }
1518
1519                 return $author;
1520         }
1521
1522         /**
1523          * @TODO Picture attachments should look like this:
1524          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1525          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1526          */
1527
1528         /**
1529          * Returns the given activity if present - otherwise returns the "post" activity
1530          *
1531          * @param array $item Data of the item that is to be posted
1532          *
1533          * @return string activity
1534          */
1535         private static function constructVerb(array $item)
1536         {
1537                 if (!empty($item['verb'])) {
1538                         return $item['verb'];
1539                 }
1540
1541                 return Activity::POST;
1542         }
1543
1544         /**
1545          * Returns the given object type if present - otherwise returns the "note" object type
1546          *
1547          * @param array $item Data of the item that is to be posted
1548          *
1549          * @return string Object type
1550          */
1551         private static function constructObjecttype(array $item)
1552         {
1553                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1554                         return $item['object-type'];
1555                 }
1556
1557                 return Activity\ObjectType::NOTE;
1558         }
1559
1560         /**
1561          * Adds an entry element to the XML document
1562          *
1563          * @param DOMDocument $doc       XML document
1564          * @param array       $item      Data of the item that is to be posted
1565          * @param array       $owner     Contact data of the poster
1566          * @param bool        $toplevel  optional default false
1567          * @param bool        $feed_mode Behave like a regular feed for users if true
1568          *
1569          * @return \DOMElement Entry element
1570          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1571          * @throws \ImagickException
1572          */
1573         private static function entry(DOMDocument $doc, array $item, array $owner, $toplevel = false, $feed_mode = false)
1574         {
1575                 $xml = null;
1576
1577                 $repeated_guid = self::getResharedGuid($item);
1578                 if ($repeated_guid != "") {
1579                         $xml = self::reshareEntry($doc, $item, $owner, $repeated_guid, $toplevel);
1580                 }
1581
1582                 if ($xml) {
1583                         return $xml;
1584                 }
1585
1586                 if ($item["verb"] == Activity::LIKE) {
1587                         return self::likeEntry($doc, $item, $owner, $toplevel);
1588                 } elseif (in_array($item["verb"], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1589                         return self::followEntry($doc, $item, $owner, $toplevel);
1590                 } else {
1591                         return self::noteEntry($doc, $item, $owner, $toplevel, $feed_mode);
1592                 }
1593         }
1594
1595         /**
1596          * Adds a source entry to the XML document
1597          *
1598          * @param DOMDocument $doc     XML document
1599          * @param array       $contact Array of the contact that is added
1600          *
1601          * @return \DOMElement Source element
1602          * @throws \Exception
1603          */
1604         private static function sourceEntry(DOMDocument $doc, array $contact)
1605         {
1606                 $source = $doc->createElement("source");
1607                 XML::addElement($doc, $source, "id", $contact["poll"]);
1608                 XML::addElement($doc, $source, "title", $contact["name"]);
1609                 XML::addElement($doc, $source, "link", "", ["rel" => "alternate", "type" => "text/html", "href" => $contact["alias"]]);
1610                 XML::addElement($doc, $source, "link", "", ["rel" => "self", "type" => "application/atom+xml", "href" => $contact["poll"]]);
1611                 XML::addElement($doc, $source, "icon", $contact["photo"]);
1612                 XML::addElement($doc, $source, "updated", DateTimeFormat::utc($contact["success_update"]."+00:00", DateTimeFormat::ATOM));
1613
1614                 return $source;
1615         }
1616
1617         /**
1618          * Fetches contact data from the contact or the gcontact table
1619          *
1620          * @param string $url   URL of the contact
1621          * @param array  $owner Contact data of the poster
1622          *
1623          * @return array Contact array
1624          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1625          * @throws \ImagickException
1626          */
1627         private static function contactEntry($url, array $owner)
1628         {
1629                 $r = q(
1630                         "SELECT * FROM `contact` WHERE `nurl` = '%s' AND `uid` IN (0, %d) ORDER BY `uid` DESC LIMIT 1",
1631                         DBA::escape(Strings::normaliseLink($url)),
1632                         intval($owner["uid"])
1633                 );
1634                 if (DBA::isResult($r)) {
1635                         $contact = $r[0];
1636                         $contact["uid"] = -1;
1637                 }
1638
1639                 if (!DBA::isResult($r)) {
1640                         $gcontact = DBA::selectFirst('gcontact', [], ['nurl' => Strings::normaliseLink($url)]);
1641                         if (DBA::isResult($r)) {
1642                                 $contact = $gcontact;
1643                                 $contact["uid"] = -1;
1644                                 $contact["success_update"] = $contact["updated"];
1645                         }
1646                 }
1647
1648                 if (!DBA::isResult($r)) {
1649                         $contact = $owner;
1650                 }
1651
1652                 if (!isset($contact["poll"])) {
1653                         $data = Probe::uri($url);
1654                         $contact["poll"] = $data["poll"];
1655
1656                         if (!$contact["alias"]) {
1657                                 $contact["alias"] = $data["alias"];
1658                         }
1659                 }
1660
1661                 if (!isset($contact["alias"])) {
1662                         $contact["alias"] = $contact["url"];
1663                 }
1664
1665                 $contact['account-type'] = $owner['account-type'];
1666
1667                 return $contact;
1668         }
1669
1670         /**
1671          * Adds an entry element with reshared content
1672          *
1673          * @param DOMDocument $doc           XML document
1674          * @param array       $item          Data of the item that is to be posted
1675          * @param array       $owner         Contact data of the poster
1676          * @param string      $repeated_guid guid
1677          * @param bool        $toplevel      Is it for en entry element (false) or a feed entry (true)?
1678          *
1679          * @return bool Entry element
1680          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1681          * @throws \ImagickException
1682          */
1683         private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid, $toplevel)
1684         {
1685                 if (($item["id"] != $item["parent"]) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1686                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1687                 }
1688
1689                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1690
1691                 $condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
1692                         'network' => [Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS]];
1693                 $repeated_item = Item::selectFirst([], $condition);
1694                 if (!DBA::isResult($repeated_item)) {
1695                         return false;
1696                 }
1697
1698                 $contact = self::contactEntry($repeated_item['author-link'], $owner);
1699
1700                 $title = $owner["nick"]." repeated a notice by ".$contact["nick"];
1701
1702                 self::entryContent($doc, $entry, $item, $owner, $title, Activity::SHARE, false);
1703
1704                 $as_object = $doc->createElement("activity:object");
1705
1706                 XML::addElement($doc, $as_object, "activity:object-type", ActivityNamespace::ACTIVITY_SCHEMA . "activity");
1707
1708                 self::entryContent($doc, $as_object, $repeated_item, $owner, "", "", false);
1709
1710                 $author = self::addAuthor($doc, $contact, false);
1711                 $as_object->appendChild($author);
1712
1713                 $as_object2 = $doc->createElement("activity:object");
1714
1715                 XML::addElement($doc, $as_object2, "activity:object-type", self::constructObjecttype($repeated_item));
1716
1717                 $title = sprintf("New comment by %s", $contact["nick"]);
1718
1719                 self::entryContent($doc, $as_object2, $repeated_item, $owner, $title);
1720
1721                 $as_object->appendChild($as_object2);
1722
1723                 self::entryFooter($doc, $as_object, $item, $owner, false);
1724
1725                 $source = self::sourceEntry($doc, $contact);
1726
1727                 $as_object->appendChild($source);
1728
1729                 $entry->appendChild($as_object);
1730
1731                 self::entryFooter($doc, $entry, $item, $owner);
1732
1733                 return $entry;
1734         }
1735
1736         /**
1737          * Adds an entry element with a "like"
1738          *
1739          * @param DOMDocument $doc      XML document
1740          * @param array       $item     Data of the item that is to be posted
1741          * @param array       $owner    Contact data of the poster
1742          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1743          *
1744          * @return \DOMElement Entry element with "like"
1745          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1746          * @throws \ImagickException
1747          */
1748         private static function likeEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1749         {
1750                 if (($item["id"] != $item["parent"]) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1751                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1752                 }
1753
1754                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1755
1756                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . "favorite";
1757                 self::entryContent($doc, $entry, $item, $owner, "Favorite", $verb, false);
1758
1759                 $parent = Item::selectFirst([], ['uri' => $item["thr-parent"], 'uid' => $item["uid"]]);
1760                 if (DBA::isResult($parent)) {
1761                         $as_object = $doc->createElement("activity:object");
1762
1763                         XML::addElement($doc, $as_object, "activity:object-type", self::constructObjecttype($parent));
1764
1765                         self::entryContent($doc, $as_object, $parent, $owner, "New entry");
1766
1767                         $entry->appendChild($as_object);
1768                 }
1769
1770                 self::entryFooter($doc, $entry, $item, $owner);
1771
1772                 return $entry;
1773         }
1774
1775         /**
1776          * Adds the person object element to the XML document
1777          *
1778          * @param DOMDocument $doc     XML document
1779          * @param array       $owner   Contact data of the poster
1780          * @param array       $contact Contact data of the target
1781          *
1782          * @return object author element
1783          */
1784         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact)
1785         {
1786                 $object = $doc->createElement("activity:object");
1787                 XML::addElement($doc, $object, "activity:object-type", Activity\ObjectType::PERSON);
1788
1789                 if ($contact['network'] == Protocol::PHANTOM) {
1790                         XML::addElement($doc, $object, "id", $contact['url']);
1791                         return $object;
1792                 }
1793
1794                 XML::addElement($doc, $object, "id", $contact["alias"]);
1795                 XML::addElement($doc, $object, "title", $contact["nick"]);
1796
1797                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $contact["url"]];
1798                 XML::addElement($doc, $object, "link", "", $attributes);
1799
1800                 $attributes = [
1801                                 "rel" => "avatar",
1802                                 "type" => "image/jpeg", // To-Do?
1803                                 "media:width" => 300,
1804                                 "media:height" => 300,
1805                                 "href" => $contact["photo"]];
1806                 XML::addElement($doc, $object, "link", "", $attributes);
1807
1808                 XML::addElement($doc, $object, "poco:preferredUsername", $contact["nick"]);
1809                 XML::addElement($doc, $object, "poco:displayName", $contact["name"]);
1810
1811                 if (trim($contact["location"]) != "") {
1812                         $element = $doc->createElement("poco:address");
1813                         XML::addElement($doc, $element, "poco:formatted", $contact["location"]);
1814                         $object->appendChild($element);
1815                 }
1816
1817                 return $object;
1818         }
1819
1820         /**
1821          * Adds a follow/unfollow entry element
1822          *
1823          * @param DOMDocument $doc      XML document
1824          * @param array       $item     Data of the follow/unfollow message
1825          * @param array       $owner    Contact data of the poster
1826          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1827          *
1828          * @return \DOMElement Entry element
1829          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1830          * @throws \ImagickException
1831          */
1832         private static function followEntry(DOMDocument $doc, array $item, array $owner, $toplevel)
1833         {
1834                 $item["id"] = $item["parent"] = 0;
1835                 $item["created"] = $item["edited"] = date("c");
1836                 $item["private"] = Item::PRIVATE;
1837
1838                 $contact = Probe::uri($item['follow']);
1839
1840                 if ($contact['alias'] == '') {
1841                         $contact['alias'] = $contact["url"];
1842                 } else {
1843                         $item['follow'] = $contact['alias'];
1844                 }
1845
1846                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact["url"])];
1847                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1848
1849                 if (DBA::isResult($user_contact)) {
1850                         $connect_id = $user_contact['id'];
1851                 } else {
1852                         $connect_id = 0;
1853                 }
1854
1855                 if ($item['verb'] == Activity::FOLLOW) {
1856                         $message = DI::l10n()->t('%s is now following %s.');
1857                         $title = DI::l10n()->t('following');
1858                         $action = "subscription";
1859                 } else {
1860                         $message = DI::l10n()->t('%s stopped following %s.');
1861                         $title = DI::l10n()->t('stopped following');
1862                         $action = "unfollow";
1863                 }
1864
1865                 $item["uri"] = $item['parent-uri'] = $item['thr-parent']
1866                                 = 'tag:' . DI::baseUrl()->getHostname().
1867                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1868                                 ':person:'.$connect_id.':'.$item['created'];
1869
1870                 $item["body"] = sprintf($message, $owner["nick"], $contact["nick"]);
1871
1872                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1873
1874                 self::entryContent($doc, $entry, $item, $owner, $title);
1875
1876                 $object = self::addPersonObject($doc, $owner, $contact);
1877                 $entry->appendChild($object);
1878
1879                 self::entryFooter($doc, $entry, $item, $owner);
1880
1881                 return $entry;
1882         }
1883
1884         /**
1885          * Adds a regular entry element
1886          *
1887          * @param DOMDocument $doc       XML document
1888          * @param array       $item      Data of the item that is to be posted
1889          * @param array       $owner     Contact data of the poster
1890          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1891          * @param bool        $feed_mode Behave like a regular feed for users if true
1892          *
1893          * @return \DOMElement Entry element
1894          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1895          * @throws \ImagickException
1896          */
1897         private static function noteEntry(DOMDocument $doc, array $item, array $owner, $toplevel, $feed_mode)
1898         {
1899                 if (($item["id"] != $item["parent"]) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
1900                         Logger::log("OStatus entry is from author ".$owner["url"]." - not from ".$item["author-link"].". Quitting.", Logger::DEBUG);
1901                 }
1902
1903                 if (!$toplevel) {
1904                         if (!empty($item['title'])) {
1905                                 $title = BBCode::convert($item['title'], false, 7);
1906                         } else {
1907                                 $title = sprintf("New note by %s", $owner["nick"]);
1908                         }
1909                 } else {
1910                         $title = sprintf("New comment by %s", $owner["nick"]);
1911                 }
1912
1913                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1914
1915                 XML::addElement($doc, $entry, "activity:object-type", Activity\ObjectType::NOTE);
1916
1917                 self::entryContent($doc, $entry, $item, $owner, $title, '', true, $feed_mode);
1918
1919                 self::entryFooter($doc, $entry, $item, $owner, !$feed_mode, $feed_mode);
1920
1921                 return $entry;
1922         }
1923
1924         /**
1925          * Adds a header element to the XML document
1926          *
1927          * @param DOMDocument $doc      XML document
1928          * @param array       $owner    Contact data of the poster
1929          * @param array       $item
1930          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1931          *
1932          * @return \DOMElement The entry element where the elements are added
1933          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1934          * @throws \ImagickException
1935          */
1936         private static function entryHeader(DOMDocument $doc, array $owner, array $item, $toplevel)
1937         {
1938                 if (!$toplevel) {
1939                         $entry = $doc->createElement("entry");
1940
1941                         if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1942                                 $contact = self::contactEntry($item['author-link'], $owner);
1943                                 $author = self::addAuthor($doc, $contact, false);
1944                                 $entry->appendChild($author);
1945                         }
1946                 } else {
1947                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, "entry");
1948
1949                         $entry->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
1950                         $entry->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
1951                         $entry->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
1952                         $entry->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
1953                         $entry->setAttribute("xmlns:poco", ActivityNamespace::POCO);
1954                         $entry->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
1955                         $entry->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
1956                         $entry->setAttribute("xmlns:mastodon", ActivityNamespace::MASTODON);
1957
1958                         $author = self::addAuthor($doc, $owner);
1959                         $entry->appendChild($author);
1960                 }
1961
1962                 return $entry;
1963         }
1964
1965         /**
1966          * Adds elements to the XML document
1967          *
1968          * @param DOMDocument $doc       XML document
1969          * @param \DOMElement $entry     Entry element where the content is added
1970          * @param array       $item      Data of the item that is to be posted
1971          * @param array       $owner     Contact data of the poster
1972          * @param string      $title     Title for the post
1973          * @param string      $verb      The activity verb
1974          * @param bool        $complete  Add the "status_net" element?
1975          * @param bool        $feed_mode Behave like a regular feed for users if true
1976          * @return void
1977          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1978          */
1979         private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, array $owner, $title, $verb = "", $complete = true, $feed_mode = false)
1980         {
1981                 if ($verb == "") {
1982                         $verb = self::constructVerb($item);
1983                 }
1984
1985                 XML::addElement($doc, $entry, "id", $item["uri"]);
1986                 XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1987
1988                 $body = self::formatPicturePost($item['body']);
1989
1990                 if (!empty($item['title']) && !$feed_mode) {
1991                         $body = "[b]".$item['title']."[/b]\n\n".$body;
1992                 }
1993
1994                 $body = BBCode::convert($body, false, 7);
1995
1996                 XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
1997
1998                 XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
1999                                                                 "href" => DI::baseUrl()."/display/".$item["guid"]]
2000                 );
2001
2002                 if (!$feed_mode && $complete && ($item["id"] > 0)) {
2003                         XML::addElement($doc, $entry, "status_net", "", ["notice_id" => $item["id"]]);
2004                 }
2005
2006                 if (!$feed_mode) {
2007                         XML::addElement($doc, $entry, "activity:verb", $verb);
2008                 }
2009
2010                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
2011                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
2012         }
2013
2014         /**
2015          * Adds the elements at the foot of an entry to the XML document
2016          *
2017          * @param DOMDocument $doc       XML document
2018          * @param object      $entry     The entry element where the elements are added
2019          * @param array       $item      Data of the item that is to be posted
2020          * @param array       $owner     Contact data of the poster
2021          * @param bool        $complete  default true
2022          * @param bool        $feed_mode Behave like a regular feed for users if true
2023          * @return void
2024          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2025          */
2026         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, $complete = true, $feed_mode = false)
2027         {
2028                 $mentioned = [];
2029
2030                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
2031                         $parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item["parent"]]);
2032                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
2033
2034                         $thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $parent_item]);
2035
2036                         if (DBA::isResult($thrparent)) {
2037                                 $mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
2038                                 $mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
2039                                 $parent_plink = $thrparent["plink"];
2040                         } else {
2041                                 $mentioned[$parent["author-link"]] = $parent["author-link"];
2042                                 $mentioned[$parent["owner-link"]] = $parent["owner-link"];
2043                                 $parent_plink = DI::baseUrl()."/display/".$parent["guid"];
2044                         }
2045
2046                         $attributes = [
2047                                         "ref" => $parent_item,
2048                                         "href" => $parent_plink];
2049                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
2050
2051                         $attributes = [
2052                                         "rel" => "related",
2053                                         "href" => $parent_plink];
2054                         XML::addElement($doc, $entry, "link", "", $attributes);
2055                 }
2056
2057                 if (!$feed_mode && (intval($item["parent"]) > 0)) {
2058                         $conversation_href = $conversation_uri = str_replace('/objects/', '/context/', $item['parent-uri']);
2059
2060                         if (isset($parent_item)) {
2061                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
2062                                 if (DBA::isResult($conversation)) {
2063                                         if ($conversation['conversation-uri'] != '') {
2064                                                 $conversation_uri = $conversation['conversation-uri'];
2065                                         }
2066                                         if ($conversation['conversation-href'] != '') {
2067                                                 $conversation_href = $conversation['conversation-href'];
2068                                         }
2069                                 }
2070                         }
2071
2072                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:conversation", "href" => $conversation_href]);
2073
2074                         $attributes = [
2075                                         "href" => $conversation_href,
2076                                         "local_id" => $item["parent"],
2077                                         "ref" => $conversation_uri];
2078
2079                         XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
2080                 }
2081
2082                 $tags = item::getFeedTags($item);
2083
2084                 if (count($tags)) {
2085                         foreach ($tags as $t) {
2086                                 if ($t[0] == "@") {
2087                                         $mentioned[$t[1]] = $t[1];
2088                                 }
2089                         }
2090                 }
2091
2092                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
2093                 $newmentions = [];
2094                 foreach ($mentioned as $mention) {
2095                         $newmentions[str_replace("http://", "https://", $mention)] = str_replace("http://", "https://", $mention);
2096                         $newmentions[str_replace("https://", "http://", $mention)] = str_replace("https://", "http://", $mention);
2097                 }
2098                 $mentioned = $newmentions;
2099
2100                 foreach ($mentioned as $mention) {
2101                         $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($mention)];
2102                         $contact = DBA::selectFirst('contact', ['forum', 'prv', 'self', 'contact-type'], $condition);
2103                         if ($contact["forum"] || $contact["prv"] || ($owner['contact-type'] == Contact::TYPE_COMMUNITY) ||
2104                                 ($contact['self'] && ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY))) {
2105                                 XML::addElement($doc, $entry, "link", "",
2106                                         [
2107                                                 "rel" => "mentioned",
2108                                                 "ostatus:object-type" => Activity\ObjectType::GROUP,
2109                                                 "href" => $mention]
2110                                 );
2111                         } else {
2112                                 XML::addElement($doc, $entry, "link", "",
2113                                         [
2114                                                 "rel" => "mentioned",
2115                                                 "ostatus:object-type" => Activity\ObjectType::PERSON,
2116                                                 "href" => $mention]
2117                                 );
2118                         }
2119                 }
2120
2121                 if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
2122                         XML::addElement($doc, $entry, "link", "", [
2123                                 "rel" => "mentioned",
2124                                 "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/group",
2125                                 "href" => $owner['url']
2126                         ]);
2127                 }
2128
2129                 if (($item['private'] != Item::PRIVATE) && !$feed_mode) {
2130                         XML::addElement($doc, $entry, "link", "", ["rel" => "ostatus:attention",
2131                                                                         "href" => "http://activityschema.org/collection/public"]);
2132                         XML::addElement($doc, $entry, "link", "", ["rel" => "mentioned",
2133                                                                         "ostatus:object-type" => "http://activitystrea.ms/schema/1.0/collection",
2134                                                                         "href" => "http://activityschema.org/collection/public"]);
2135                         XML::addElement($doc, $entry, "mastodon:scope", "public");
2136                 }
2137
2138                 if (count($tags)) {
2139                         foreach ($tags as $t) {
2140                                 if ($t[0] != "@") {
2141                                         XML::addElement($doc, $entry, "category", "", ["term" => $t[2]]);
2142                                 }
2143                         }
2144                 }
2145
2146                 self::getAttachment($doc, $entry, $item);
2147
2148                 if ($complete && ($item["id"] > 0)) {
2149                         $app = $item["app"];
2150                         if ($app == "") {
2151                                 $app = "web";
2152                         }
2153
2154                         $attributes = ["local_id" => $item["id"], "source" => $app];
2155
2156                         if (isset($parent["id"])) {
2157                                 $attributes["repeat_of"] = $parent["id"];
2158                         }
2159
2160                         if ($item["coord"] != "") {
2161                                 XML::addElement($doc, $entry, "georss:point", $item["coord"]);
2162                         }
2163
2164                         XML::addElement($doc, $entry, "statusnet:notice_info", "", $attributes);
2165                 }
2166         }
2167
2168         /**
2169          * Creates the XML feed for a given nickname
2170          *
2171          * Supported filters:
2172          * - activity (default): all the public posts
2173          * - posts: all the public top-level posts
2174          * - comments: all the public replies
2175          *
2176          * Updates the provided last_update parameter if the result comes from the
2177          * cache or it is empty
2178          *
2179          * @param string  $owner_nick  Nickname of the feed owner
2180          * @param string  $last_update Date of the last update
2181          * @param integer $max_items   Number of maximum items to fetch
2182          * @param string  $filter      Feed items filter (activity, posts or comments)
2183          * @param boolean $nocache     Wether to bypass caching
2184          * @param boolean $feed_mode   Behave like a regular feed for users if true
2185          *
2186          * @return string XML feed
2187          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2188          * @throws \ImagickException
2189          */
2190         public static function feed($owner_nick, &$last_update, $max_items = 300, $filter = 'activity', $nocache = false, $feed_mode = false)
2191         {
2192                 $stamp = microtime(true);
2193
2194                 $owner = User::getOwnerDataByNick($owner_nick);
2195                 if (!$owner) {
2196                         return;
2197                 }
2198
2199                 $cachekey = "ostatus:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
2200
2201                 $previous_created = $last_update;
2202
2203                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2204                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2205                         $result = DI::cache()->get($cachekey);
2206                         if (!$nocache && !is_null($result)) {
2207                                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)', Logger::DEBUG);
2208                                 $last_update = $result['last_update'];
2209                                 return $result['feed'];
2210                         }
2211                 }
2212
2213                 if (!strlen($last_update)) {
2214                         $last_update = 'now -30 days';
2215                 }
2216
2217                 $check_date = DateTimeFormat::utc($last_update);
2218                 $authorid = Contact::getIdForURL($owner["url"], 0, true);
2219
2220                 $condition = ["`uid` = ? AND `received` > ? AND NOT `deleted`
2221                         AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2222                         $owner["uid"], $check_date, Item::PRIVATE, Protocol::OSTATUS, Protocol::DFRN];
2223
2224                 if ($filter === 'comments') {
2225                         $condition[0] .= " AND `object-type` = ? ";
2226                         $condition[] = Activity\ObjectType::COMMENT;
2227                 }
2228
2229                 if ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2230                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2231                         $condition[] = $owner["id"];
2232                         $condition[] = $authorid;
2233                 }
2234
2235                 $params = ['order' => ['received' => true], 'limit' => $max_items];
2236
2237                 if ($filter === 'posts') {
2238                         $ret = Item::selectThread([], $condition, $params);
2239                 } else {
2240                         $ret = Item::select([], $condition, $params);
2241                 }
2242
2243                 $items = Item::inArray($ret);
2244
2245                 $doc = new DOMDocument('1.0', 'utf-8');
2246                 $doc->formatOutput = true;
2247
2248                 $root = self::addHeader($doc, $owner, $filter, $feed_mode);
2249
2250                 foreach ($items as $item) {
2251                         if (DI::config()->get('system', 'ostatus_debug')) {
2252                                 $item['body'] .= '🍼';
2253                         }
2254
2255                         $entry = self::entry($doc, $item, $owner, false, $feed_mode);
2256                         $root->appendChild($entry);
2257
2258                         if ($last_update < $item['created']) {
2259                                 $last_update = $item['created'];
2260                         }
2261                 }
2262
2263                 $feeddata = trim($doc->saveXML());
2264
2265                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2266                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
2267
2268                 Logger::log('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created, Logger::DEBUG);
2269
2270                 return $feeddata;
2271         }
2272
2273         /**
2274          * Creates the XML for a salmon message
2275          *
2276          * @param array $item  Data of the item that is to be posted
2277          * @param array $owner Contact data of the poster
2278          *
2279          * @return string XML for the salmon
2280          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2281          * @throws \ImagickException
2282          */
2283         public static function salmon(array $item, array $owner)
2284         {
2285                 $doc = new DOMDocument('1.0', 'utf-8');
2286                 $doc->formatOutput = true;
2287
2288                 if (DI::config()->get('system', 'ostatus_debug')) {
2289                         $item['body'] .= '🐟';
2290                 }
2291
2292                 $entry = self::entry($doc, $item, $owner, true);
2293
2294                 $doc->appendChild($entry);
2295
2296                 return trim($doc->saveXML());
2297         }
2298
2299         /**
2300          * Checks if the given contact url does support OStatus
2301          *
2302          * @param string  $url    profile url
2303          * @param boolean $update Update the profile
2304          * @return boolean
2305          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2306          * @throws \ImagickException
2307          */
2308         public static function isSupportedByContactUrl($url, $update = false)
2309         {
2310                 $probe = Probe::uri($url, Protocol::OSTATUS, 0, !$update);
2311                 return $probe['network'] == Protocol::OSTATUS;
2312         }
2313 }