src/Protocol/OStatus.php

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