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                 $item['conversation-uri'] = XML::getFirstNodeValue($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-uri'] = $attributes->textContent;
 626                                 }
 627                                 if ($attributes->name == 'href') {
 628                                         $item['conversation-href'] = $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 (($self != '') && empty($item['protocol'])) {
 708                         self::fetchSelf($self, $item);
 709                 }
 710
 711                 if (!empty($item['conversation-href'])) {
 712                         self::fetchConversation($item['conversation-href'], $item['conversation-uri']);
 713                 }
 714
 715                 if (isset($item['thr-parent'])) {
 716                         if (!Post::exists(['uid' => $importer['uid'], 'uri' => $item['thr-parent']])) {
 717                                 if ($related != '') {
 718                                         self::fetchRelated($related, $item['thr-parent'], $importer);
 719                                 }
 720                         } else {
 721                                 Logger::info('Reply with URI ' . $item['uri'] . ' already existed for user ' . $importer['uid'] . '.');
 722                         }
 723                 } else {
 724                         $item['thr-parent'] = $item['uri'];
 725                         $item['gravity'] = GRAVITY_PARENT;
 726                 }
 727
 728                 if (($item['author-link'] != '') && !empty($item['protocol'])) {
 729                         $item = Conversation::insert($item);
 730                 }
 731
 732                 self::$itemlist[] = $item;
 733         }
 734
 735         /**
 736          * Fetch the conversation for posts
 737          *
 738          * @param string $conversation     The link to the conversation
 739          * @param string $conversation_uri The conversation in "uri" format
 740          * @return void
 741          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 742          */
 743         private static function fetchConversation(string $conversation, string $conversation_uri)
 744         {
 745                 // Ensure that we only store a conversation once in a process
 746                 if (isset(self::$conv_list[$conversation])) {
 747                         return;
 748                 }
 749
 750                 self::$conv_list[$conversation] = true;
 751
 752                 $curlResult = DI::httpClient()->get($conversation, HttpClientAccept::ATOM_XML);
 753
 754                 if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
 755                         return;
 756                 }
 757
 758                 $xml = '';
 759
 760                 if ($curlResult->inHeader('Content-Type') &&
 761                         in_array('application/atom+xml', $curlResult->getHeader('Content-Type'))) {
 762                         $xml = $curlResult->getBody();
 763                 }
 764
 765                 if ($xml == '') {
 766                         $doc = new DOMDocument();
 767                         if (!@$doc->loadHTML($curlResult->getBody())) {
 768                                 return;
 769                         }
 770                         $xpath = new DOMXPath($doc);
 771
 772                         $links = $xpath->query('//link');
 773                         if ($links) {
 774                                 $file = '';
 775                                 foreach ($links as $link) {
 776                                         $attribute = self::readAttributes($link);
 777                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 778                                                 $file = $attribute['href'];
 779                                         }
 780                                 }
 781                                 if ($file != '') {
 782                                         $conversation_atom = DI::httpClient()->get($attribute['href'], HttpClientAccept::ATOM_XML);
 783
 784                                         if ($conversation_atom->isSuccess()) {
 785                                                 $xml = $conversation_atom->getBody();
 786                                         }
 787                                 }
 788                         }
 789                 }
 790
 791                 if ($xml == '') {
 792                         return;
 793                 }
 794
 795                 self::storeConversation($xml, $conversation, $conversation_uri);
 796         }
 797
 798         /**
 799          * Store a feed in several conversation entries
 800          *
 801          * @param string $xml              The feed
 802          * @param string $conversation     conversation
 803          * @param string $conversation_uri conversation uri
 804          * @return void
 805          * @throws \Exception
 806          */
 807         private static function storeConversation(string $xml, string $conversation = '', string $conversation_uri = '')
 808         {
 809                 $doc = new DOMDocument();
 810                 @$doc->loadXML($xml);
 811
 812                 $xpath = new DOMXPath($doc);
 813                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 814                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 815                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 816
 817                 $entries = $xpath->query('/atom:feed/atom:entry');
 818
 819                 // Now store the entries
 820                 foreach ($entries as $entry) {
 821                         $doc2 = new DOMDocument();
 822                         $doc2->preserveWhiteSpace = false;
 823                         $doc2->formatOutput = true;
 824
 825                         $conv_data = [];
 826
 827                         $conv_data['protocol'] = Conversation::PARCEL_SPLIT_CONVERSATION;
 828                         $conv_data['direction'] = Conversation::PULL;
 829                         $conv_data['network'] = Protocol::OSTATUS;
 830                         $conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 831
 832                         $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 833                         if (is_object($inreplyto->item(0))) {
 834                                 foreach ($inreplyto->item(0)->attributes as $attributes) {
 835                                         if ($attributes->name == 'ref') {
 836                                                 $conv_data['reply-to-uri'] = $attributes->textContent;
 837                                         }
 838                                 }
 839                         }
 840
 841                         $conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 842
 843                         $conv = $xpath->query('ostatus:conversation', $entry);
 844                         if (is_object($conv->item(0))) {
 845                                 foreach ($conv->item(0)->attributes as $attributes) {
 846                                         if ($attributes->name == 'ref') {
 847                                                 $conv_data['conversation-uri'] = $attributes->textContent;
 848                                         }
 849                                         if ($attributes->name == 'href') {
 850                                                 $conv_data['conversation-href'] = $attributes->textContent;
 851                                         }
 852                                 }
 853                         }
 854
 855                         if ($conversation != '') {
 856                                 $conv_data['conversation-uri'] = $conversation;
 857                         }
 858
 859                         if ($conversation_uri != '') {
 860                                 $conv_data['conversation-uri'] = $conversation_uri;
 861                         }
 862
 863                         $entry = $doc2->importNode($entry, true);
 864
 865                         $doc2->appendChild($entry);
 866
 867                         $conv_data['source'] = $doc2->saveXML();
 868
 869                         Logger::info('Store conversation data for uri '.$conv_data['uri']);
 870                         Conversation::insert($conv_data);
 871                 }
 872         }
 873
 874         /**
 875          * Fetch the own post so that it can be stored later
 876          *
 877          * We want to store the original data for later processing.
 878          * This function is meant for cases where we process a feed with multiple entries.
 879          * In that case we need to fetch the single posts here.
 880          *
 881          * @param string $self The link to the self item
 882          * @param array  $item The item array
 883          * @return void
 884          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 885          */
 886         private static function fetchSelf(string $self, array &$item)
 887         {
 888                 $condition = ['item-uri' => $self, 'protocol' => [Conversation::PARCEL_DFRN,
 889                         Conversation::PARCEL_DIASPORA_DFRN, Conversation::PARCEL_LOCAL_DFRN,
 890                         Conversation::PARCEL_DIRECT, Conversation::PARCEL_SALMON]];
 891                 if (DBA::exists('conversation', $condition)) {
 892                         Logger::info('Conversation '.$item['uri'].' is already stored.');
 893                         return;
 894                 }
 895
 896                 $curlResult = DI::httpClient()->get($self, HttpClientAccept::ATOM_XML);
 897
 898                 if (!$curlResult->isSuccess()) {
 899                         return;
 900                 }
 901
 902                 // We reformat the XML to make it better readable
 903                 $doc = new DOMDocument();
 904                 $doc->loadXML($curlResult->getBody());
 905                 $doc->preserveWhiteSpace = false;
 906                 $doc->formatOutput = true;
 907                 $xml = $doc->saveXML();
 908
 909                 $item['protocol'] = Conversation::PARCEL_SALMON;
 910                 $item['source'] = $xml;
 911                 $item['direction'] = Conversation::PULL;
 912
 913                 Logger::info('Conversation '.$item['uri'].' is now fetched.');
 914         }
 915
 916         /**
 917          * Fetch related posts and processes them
 918          *
 919          * @param string $related     The link to the related item
 920          * @param string $related_uri The related item in "uri" format
 921          * @param array  $importer    user record of the importing user
 922          * @return void
 923          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 924          * @throws \ImagickException
 925          */
 926         private static function fetchRelated(string $related, string $related_uri, array $importer)
 927         {
 928                 $condition = [
 929                         'item-uri' => $related_uri,
 930                         'protocol' => [
 931                                 Conversation::PARCEL_DFRN,
 932                                 Conversation::PARCEL_DIASPORA_DFRN,
 933                                 Conversation::PARCEL_LOCAL_DFRN,
 934                                 Conversation::PARCEL_DIRECT,
 935                                 Conversation::PARCEL_SALMON,
 936                         ],
 937                 ];
 938                 $conversation = DBA::selectFirst('conversation', ['source', 'protocol'], $condition);
 939                 if (DBA::isResult($conversation)) {
 940                         $stored = true;
 941                         $xml = $conversation['source'];
 942                         if (self::process($xml, $importer, $contact, $hub, $stored, false, Conversation::PULL)) {
 943                                 Logger::info('Got valid cached XML for URI '.$related_uri);
 944                                 return;
 945                         }
 946                         if ($conversation['protocol'] == Conversation::PARCEL_SALMON) {
 947                                 Logger::info('Delete invalid cached XML for URI '.$related_uri);
 948                                 DBA::delete('conversation', ['item-uri' => $related_uri]);
 949                         }
 950                 }
 951
 952                 $stored = false;
 953                 $curlResult = DI::httpClient()->get($related, HttpClientAccept::ATOM_XML);
 954
 955                 if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
 956                         return;
 957                 }
 958
 959                 $xml = '';
 960
 961                 if ($curlResult->inHeader('Content-Type') &&
 962                         in_array('application/atom+xml', $curlResult->getHeader('Content-Type'))) {
 963                         Logger::info('Directly fetched XML for URI ' . $related_uri);
 964                         $xml = $curlResult->getBody();
 965                 }
 966
 967                 if ($xml == '') {
 968                         $doc = new DOMDocument();
 969                         if (!@$doc->loadHTML($curlResult->getBody())) {
 970                                 return;
 971                         }
 972                         $xpath = new DOMXPath($doc);
 973
 974                         $atom_file = '';
 975
 976                         $links = $xpath->query('//link');
 977                         if ($links) {
 978                                 foreach ($links as $link) {
 979                                         $attribute = self::readAttributes($link);
 980                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 981                                                 $atom_file = $attribute['href'];
 982                                         }
 983                                 }
 984                                 if ($atom_file != '') {
 985                                         $curlResult = DI::httpClient()->get($atom_file, HttpClientAccept::ATOM_XML);
 986
 987                                         if ($curlResult->isSuccess()) {
 988                                                 Logger::info('Fetched XML for URI ' . $related_uri);
 989                                                 $xml = $curlResult->getBody();
 990                                         }
 991                                 }
 992                         }
 993                 }
 994
 995                 // Workaround for older GNU Social servers
 996                 if (($xml == '') && strstr($related, '/notice/')) {
 997                         $curlResult = DI::httpClient()->get(str_replace('/notice/', '/api/statuses/show/', $related) . '.atom', HttpClientAccept::ATOM_XML);
 998
 999                         if ($curlResult->isSuccess()) {
1000                                 Logger::info('GNU Social workaround to fetch XML for URI ' . $related_uri);
1001                                 $xml = $curlResult->getBody();
1002                         }
1003                 }
1004
1005                 // Even more worse workaround for GNU Social ;-)
1006                 if ($xml == '') {
1007                         $related_guess = self::convertHref($related_uri);
1008                         $curlResult = DI::httpClient()->get(str_replace('/notice/', '/api/statuses/show/', $related_guess) . '.atom', HttpClientAccept::ATOM_XML);
1009
1010                         if ($curlResult->isSuccess()) {
1011                                 Logger::info('GNU Social workaround 2 to fetch XML for URI ' . $related_uri);
1012                                 $xml = $curlResult->getBody();
1013                         }
1014                 }
1015
1016                 // Finally we take the data that we fetched from "ostatus:conversation"
1017                 if ($xml == '') {
1018                         $condition = ['item-uri' => $related_uri, 'protocol' => Conversation::PARCEL_SPLIT_CONVERSATION];
1019                         $conversation = DBA::selectFirst('conversation', ['source'], $condition);
1020                         if (DBA::isResult($conversation)) {
1021                                 $stored = true;
1022                                 Logger::info('Got cached XML from conversation for URI ' . $related_uri);
1023                                 $xml = $conversation['source'];
1024                         }
1025                 }
1026
1027                 if ($xml != '') {
1028                         self::process($xml, $importer, $contact, $hub, $stored, false, Conversation::PULL);
1029                 } else {
1030                         Logger::info('XML could not be fetched for URI: ' . $related_uri . ' - href: ' . $related);
1031                 }
1032                 return;
1033         }
1034
1035         /**
1036          * Processes the XML for a repeated post
1037          *
1038          * @param DOMXPath $xpath    The xpath object
1039          * @param object   $entry    The xml entry that is processed
1040          * @param array    $item     The item array
1041          * @param array    $importer user record of the importing user
1042          *
1043          * @return array with data from links
1044          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1045          * @throws \ImagickException
1046          */
1047         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer): array
1048         {
1049                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
1050
1051                 if (!is_object($activityobject)) {
1052                         return [];
1053                 }
1054
1055                 $link_data = [];
1056
1057                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
1058
1059                 $links = $xpath->query('atom:link', $activityobject);
1060                 if ($links) {
1061                         $link_data = self::processLinks($links, $item);
1062                 }
1063
1064                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
1065                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
1066                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
1067
1068                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
1069
1070                 $item['author-name'] = $orig_author['author-name'];
1071                 $item['author-link'] = $orig_author['author-link'];
1072                 $item['author-id'] = $orig_author['author-id'];
1073
1074                 $item['body'] = HTML::toBBCode($orig_body);
1075                 $item['created'] = $orig_created;
1076                 $item['edited'] = $orig_edited;
1077
1078                 $item['uri'] = $orig_uri;
1079
1080                 $item['verb'] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
1081
1082                 $item['object-type'] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
1083
1084                 // Mastodon Content Warning
1085                 if (($item['verb'] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
1086                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
1087                         if (!empty($clear_text)) {
1088                                 $item['content-warning'] = HTML::toBBCode($clear_text);
1089                         }
1090                 }
1091
1092                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
1093                 if (is_object($inreplyto->item(0))) {
1094                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1095                                 if ($attributes->name == 'ref') {
1096                                         $item['thr-parent'] = $attributes->textContent;
1097                                 }
1098                         }
1099                 }
1100
1101                 return $link_data;
1102         }
1103
1104         /**
1105          * Processes links in the XML
1106          *
1107          * @param object $links The xml data that contain links
1108          * @param array  $item  The item array
1109          * @return array with data from the links
1110          */
1111         private static function processLinks($links, array &$item): array
1112         {
1113                 $link_data = ['add_body' => '', 'self' => ''];
1114
1115                 foreach ($links as $link) {
1116                         $attribute = self::readAttributes($link);
1117
1118                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
1119                                 switch ($attribute['rel']) {
1120                                         case 'alternate':
1121                                                 $item['plink'] = $attribute['href'];
1122                                                 if (($item['object-type'] == Activity\ObjectType::QUESTION)
1123                                                         || ($item['object-type'] == Activity\ObjectType::EVENT)
1124                                                 ) {
1125                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::UNKNOWN,
1126                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'] ?? null,
1127                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
1128                                                 }
1129                                                 break;
1130
1131                                         case 'ostatus:conversation':
1132                                                 $link_data['conversation'] = $attribute['href'];
1133                                                 $item['conversation-href'] = $link_data['conversation'];
1134                                                 if (!isset($item['conversation-uri'])) {
1135                                                         $item['conversation-uri'] = $item['conversation-href'];
1136                                                 }
1137                                                 break;
1138
1139                                         case 'enclosure':
1140                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
1141                                                 if ($filetype == 'image') {
1142                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
1143                                                 } else {
1144                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::DOCUMENT,
1145                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'],
1146                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
1147                                                 }
1148                                                 break;
1149
1150                                         case 'related':
1151                                                 if ($item['object-type'] != Activity\ObjectType::BOOKMARK) {
1152                                                         if (!isset($item['thr-parent'])) {
1153                                                                 $item['thr-parent'] = $attribute['href'];
1154                                                         }
1155                                                         $link_data['related'] = $attribute['href'];
1156                                                 } else {
1157                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::UNKNOWN,
1158                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'] ?? null,
1159                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
1160                                                 }
1161                                                 break;
1162
1163                                         case 'self':
1164                                                 if (empty($item['plink'])) {
1165                                                         $item['plink'] = $attribute['href'];
1166                                                 }
1167                                                 $link_data['self'] = $attribute['href'];
1168                                                 break;
1169
1170                                         default:
1171                                                 Logger::warning('Unsupported rel=' . $attribute['rel'] . ', href=' . $attribute['href'] . ', object-type=' . $attribute['object-type']);
1172                                 }
1173                         }
1174                 }
1175                 return $link_data;
1176         }
1177
1178         /**
1179          * Create an url out of an uri
1180          *
1181          * @param string $href URI in the format "parameter1:parameter1:..."
1182          * @return string URL in the format http(s)://....
1183          */
1184         private static function convertHref(string $href): string
1185         {
1186                 $elements = explode(':', $href);
1187
1188                 if ((count($elements) <= 2) || ($elements[0] != 'tag')) {
1189                         return $href;
1190                 }
1191
1192                 $server = explode(',', $elements[1]);
1193                 $conversation = explode('=', $elements[2]);
1194
1195                 if ((count($elements) == 4) && ($elements[2] == 'post')) {
1196                         return 'http://' . $server[0] . '/notice/' . $elements[3];
1197                 }
1198
1199                 if ((count($conversation) != 2) || ($conversation[1] == '')) {
1200                         return $href;
1201                 }
1202
1203                 if ($elements[3] == 'objectType=thread') {
1204                         return 'http://' . $server[0] . '/conversation/' . $conversation[1];
1205                 } else {
1206                         return 'http://' . $server[0] . '/notice/' . $conversation[1];
1207                 }
1208         }
1209
1210         /**
1211          * Cleans the body of a post if it contains picture links
1212          *
1213          * @param string $body The body
1214          * @param integer $uriid URI id
1215          * @return string The cleaned body
1216          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1217          */
1218         public static function formatPicturePost(string $body, int $uriid): string
1219         {
1220                 $siteinfo = BBCode::getAttachedData($body);
1221
1222                 if (($siteinfo['type'] == 'photo') && (!empty($siteinfo['preview']) || !empty($siteinfo['image']))) {
1223                         if (isset($siteinfo['preview'])) {
1224                                 $preview = $siteinfo['preview'];
1225                         } else {
1226                                 $preview = $siteinfo['image'];
1227                         }
1228
1229                         // Is it a remote picture? Then make a smaller preview here
1230                         $preview = Post\Link::getByLink($uriid, $preview, Proxy::SIZE_SMALL);
1231
1232                         // Is it a local picture? Then make it smaller here
1233                         $preview = str_replace(['-0.jpg', '-0.png'], ['-2.jpg', '-2.png'], $preview);
1234                         $preview = str_replace(['-1.jpg', '-1.png'], ['-2.jpg', '-2.png'], $preview);
1235
1236                         if (isset($siteinfo['url'])) {
1237                                 $url = $siteinfo['url'];
1238                         } else {
1239                                 $url = $siteinfo['image'];
1240                         }
1241
1242                         $body = trim($siteinfo['text']) . ' [url]' . $url . "[/url]\n[img]" . $preview . '[/img]';
1243                 }
1244
1245                 return $body;
1246         }
1247
1248         /**
1249          * Adds the header elements to the XML document
1250          *
1251          * @param DOMDocument $doc       XML document
1252          * @param array       $owner     Contact data of the poster
1253          * @param string      $filter    The related feed filter (activity, posts or comments)
1254          *
1255          * @return DOMElement Header root element
1256          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1257          */
1258         private static function addHeader(DOMDocument $doc, array $owner, string $filter): DOMElement
1259         {
1260                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
1261                 $doc->appendChild($root);
1262
1263                 $root->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
1264                 $root->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
1265                 $root->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
1266                 $root->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
1267                 $root->setAttribute('xmlns:poco', ActivityNamespace::POCO);
1268                 $root->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
1269                 $root->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
1270                 $root->setAttribute('xmlns:mastodon', ActivityNamespace::MASTODON);
1271
1272                 $title = '';
1273                 $selfUri = '/feed/' . $owner['nick'] . '/';
1274                 switch ($filter) {
1275                         case 'activity':
1276                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1277                                 $selfUri .= $filter;
1278                                 break;
1279
1280                         case 'posts':
1281                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1282                                 break;
1283
1284                         case 'comments':
1285                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1286                                 $selfUri .= $filter;
1287                                 break;
1288                 }
1289
1290                 $selfUri = '/dfrn_poll/' . $owner['nick'];
1291
1292                 $attributes = [
1293                         'uri' => 'https://friendi.ca',
1294                         'version' => FRIENDICA_VERSION . '-' . DB_UPDATE_VERSION,
1295                 ];
1296                 XML::addElement($doc, $root, 'generator', FRIENDICA_PLATFORM, $attributes);
1297                 XML::addElement($doc, $root, 'id', DI::baseUrl() . '/profile/' . $owner['nick']);
1298                 XML::addElement($doc, $root, 'title', $title);
1299                 XML::addElement($doc, $root, 'subtitle', sprintf("Updates from %s on %s", $owner['name'], DI::config()->get('config', 'sitename')));
1300                 XML::addElement($doc, $root, 'logo', User::getAvatarUrl($owner, Proxy::SIZE_SMALL));
1301                 XML::addElement($doc, $root, 'updated', DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1302
1303                 $author = self::addAuthor($doc, $owner, true);
1304                 $root->appendChild($author);
1305
1306                 $attributes = [
1307                         'href' => $owner['url'],
1308                         'rel' => 'alternate',
1309                         'type' => 'text/html',
1310                 ];
1311                 XML::addElement($doc, $root, 'link', '', $attributes);
1312
1313                 /// @TODO We have to find out what this is
1314                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1315                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1316                 ///             "type" => "application/json");
1317                 /// XML::addElement($doc, $root, "link", "", $attributes);
1318
1319                 self::addHubLink($doc, $root, $owner['nick']);
1320
1321                 $attributes = ['href' => DI::baseUrl() . '/salmon/' . $owner['nick'], 'rel' => 'salmon'];
1322                 XML::addElement($doc, $root, 'link', '', $attributes);
1323
1324                 $attributes = ['href' => DI::baseUrl() . '/salmon/' . $owner['nick'], 'rel' => 'http://salmon-protocol.org/ns/salmon-replies'];
1325                 XML::addElement($doc, $root, 'link', '', $attributes);
1326
1327                 $attributes = ['href' => DI::baseUrl() . '/salmon/' . $owner['nick'], 'rel' => 'http://salmon-protocol.org/ns/salmon-mention'];
1328                 XML::addElement($doc, $root, 'link', '', $attributes);
1329
1330                 $attributes = ['href' => DI::baseUrl() . $selfUri, 'rel' => 'self', 'type' => 'application/atom+xml'];
1331                 XML::addElement($doc, $root, 'link', '', $attributes);
1332
1333                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1334                         $members = DBA::count('contact', [
1335                                 'uid'     => $owner['uid'],
1336                                 'self'    => false,
1337                                 'pending' => false,
1338                                 'archive' => false,
1339                                 'hidden'  => false,
1340                                 'blocked' => false,
1341                         ]);
1342                         XML::addElement($doc, $root, 'statusnet:group_info', '', ['member_count' => $members]);
1343                 }
1344
1345                 return $root;
1346         }
1347
1348         /**
1349          * Add the link to the push hubs to the XML document
1350          *
1351          * @param DOMDocument $doc  XML document
1352          * @param DOMElement  $root XML root element where the hub links are added
1353          * @param string      $nick Nickname
1354          * @return void
1355          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1356          */
1357         public static function addHubLink(DOMDocument $doc, DOMElement $root, string $nick)
1358         {
1359                 $h = DI::baseUrl() . '/pubsubhubbub/' . $nick;
1360                 XML::addElement($doc, $root, 'link', '', ['href' => $h, 'rel' => 'hub']);
1361         }
1362
1363         /**
1364          * Adds attachment data to the XML document
1365          *
1366          * @param DOMDocument $doc  XML document
1367          * @param DOMElement  $root XML root element where the hub links are added
1368          * @param array       $item Data of the item that is to be posted
1369          * @return void
1370          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1371          */
1372         public static function getAttachment(DOMDocument $doc, DOMElement $root, array $item)
1373         {
1374                 $siteinfo = BBCode::getAttachedData($item['body']);
1375
1376                 switch ($siteinfo['type']) {
1377                         case 'photo':
1378                                 if (!empty($siteinfo['image'])) {
1379                                         $imgdata = Images::getInfoFromURLCached($siteinfo['image']);
1380                                         if ($imgdata) {
1381                                                 $attributes = [
1382                                                         'rel' => 'enclosure',
1383                                                         'href' => $siteinfo['image'],
1384                                                         'type' => $imgdata['mime'],
1385                                                         'length' => intval($imgdata['size']),
1386                                                 ];
1387                                                 XML::addElement($doc, $root, 'link', '', $attributes);
1388                                         }
1389                                 }
1390                                 break;
1391                         case 'video':
1392                                 $attributes = [
1393                                         'rel' => 'enclosure',
1394                                         'href' => $siteinfo['url'],
1395                                         'type' => 'text/html; charset=UTF-8',
1396                                         'length' => '0',
1397                                         'title' => ($siteinfo['title'] ?? '') ?: $siteinfo['url'],
1398                                 ];
1399                                 XML::addElement($doc, $root, 'link', '', $attributes);
1400                                 break;
1401                         default:
1402                                 break;
1403                 }
1404
1405                 if (!DI::config()->get('system', 'ostatus_not_attach_preview') && ($siteinfo['type'] != 'photo') && isset($siteinfo['image'])) {
1406                         $imgdata = Images::getInfoFromURLCached($siteinfo['image']);
1407                         if ($imgdata) {
1408                                 $attributes = [
1409                                         'rel' => 'enclosure',
1410                                         'href' => $siteinfo['image'],
1411                                         'type' => $imgdata['mime'],
1412                                         'length' => intval($imgdata['size']),
1413                                 ];
1414
1415                                 XML::addElement($doc, $root, 'link', '', $attributes);
1416                         }
1417                 }
1418
1419                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
1420                         $attributes = ['rel' => 'enclosure',
1421                                 'href' => $attachment['url'],
1422                                 'type' => $attachment['mimetype']];
1423
1424                         if (!empty($attachment['size'])) {
1425                                 $attributes['length'] = intval($attachment['size']);
1426                         }
1427                         if (!empty($attachment['description'])) {
1428                                 $attributes['title'] = $attachment['description'];
1429                         }
1430
1431                         XML::addElement($doc, $root, 'link', '', $attributes);
1432                 }
1433         }
1434
1435         /**
1436          * Adds the author element to the XML document
1437          *
1438          * @param DOMDocument $doc          XML document
1439          * @param array       $owner        Contact data of the poster
1440          * @param bool        $show_profile Whether to show profile
1441          * @return DOMElement Author element
1442          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1443          */
1444         private static function addAuthor(DOMDocument $doc, array $owner, bool $show_profile = true): DOMElement
1445         {
1446                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1447                 $author = $doc->createElement('author');
1448                 XML::addElement($doc, $author, 'id', $owner['url']);
1449                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1450                         XML::addElement($doc, $author, 'activity:object-type', Activity\ObjectType::GROUP);
1451                 } else {
1452                         XML::addElement($doc, $author, 'activity:object-type', Activity\ObjectType::PERSON);
1453                 }
1454
1455                 XML::addElement($doc, $author, 'uri', $owner['url']);
1456                 XML::addElement($doc, $author, 'name', $owner['nick']);
1457                 XML::addElement($doc, $author, 'email', $owner['addr']);
1458                 if ($show_profile) {
1459                         XML::addElement($doc, $author, 'summary', BBCode::convertForUriId($owner['uri-id'], $owner['about'], BBCode::OSTATUS));
1460                 }
1461
1462                 $attributes = [
1463                         'rel' => 'alternate',
1464                         'type' => 'text/html',
1465                         'href' => $owner['url'],
1466                 ];
1467                 XML::addElement($doc, $author, 'link', '', $attributes);
1468
1469                 $attributes = [
1470                         'rel' => 'avatar',
1471                         'type' => 'image/jpeg', // To-Do?
1472                         'media:width' => Proxy::PIXEL_SMALL,
1473                         'media:height' => Proxy::PIXEL_SMALL,
1474                         'href' => User::getAvatarUrl($owner, Proxy::SIZE_SMALL),
1475                 ];
1476                 XML::addElement($doc, $author, 'link', '', $attributes);
1477
1478                 if (isset($owner['thumb'])) {
1479                         $attributes = [
1480                                 'rel' => 'avatar',
1481                                 'type' => 'image/jpeg', // To-Do?
1482                                 'media:width' => Proxy::PIXEL_THUMB,
1483                                 'media:height' => Proxy::PIXEL_THUMB,
1484                                 'href' => User::getAvatarUrl($owner, Proxy::SIZE_THUMB),
1485                         ];
1486                         XML::addElement($doc, $author, 'link', '', $attributes);
1487                 }
1488
1489                 XML::addElement($doc, $author, 'poco:preferredUsername', $owner['nick']);
1490                 XML::addElement($doc, $author, 'poco:displayName', $owner['name']);
1491                 if ($show_profile) {
1492                         XML::addElement($doc, $author, 'poco:note', BBCode::convertForUriId($owner['uri-id'], $owner['about'], BBCode::OSTATUS));
1493
1494                         if (trim($owner['location']) != '') {
1495                                 $element = $doc->createElement('poco:address');
1496                                 XML::addElement($doc, $element, 'poco:formatted', $owner['location']);
1497                                 $author->appendChild($element);
1498                         }
1499                 }
1500
1501                 if (DBA::isResult($profile) && !$show_profile) {
1502                         if (trim($profile['homepage']) != '') {
1503                                 $urls = $doc->createElement('poco:urls');
1504                                 XML::addElement($doc, $urls, 'poco:type', 'homepage');
1505                                 XML::addElement($doc, $urls, 'poco:value', $profile['homepage']);
1506                                 XML::addElement($doc, $urls, 'poco:primary', 'true');
1507                                 $author->appendChild($urls);
1508                         }
1509
1510                         XML::addElement($doc, $author, 'followers', '', ['url' => DI::baseUrl() . '/profile/' . $owner['nick'] . '/contacts/followers']);
1511                         XML::addElement($doc, $author, 'statusnet:profile_info', '', ['local_id' => $owner['uid']]);
1512
1513                         if ($profile['publish']) {
1514                                 XML::addElement($doc, $author, 'mastodon:scope', 'public');
1515                         }
1516                 }
1517
1518                 return $author;
1519         }
1520
1521         /**
1522          * @TODO Picture attachments should look like this:
1523          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1524          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1525          */
1526
1527         /**
1528          * Returns the given activity if present - otherwise returns the "post" activity
1529          *
1530          * @param array $item Data of the item that is to be posted
1531          * @return string activity
1532          */
1533         public static function constructVerb(array $item): string
1534         {
1535                 if (!empty($item['verb'])) {
1536                         return $item['verb'];
1537                 }
1538
1539                 return Activity::POST;
1540         }
1541
1542         /**
1543          * Returns the given object type if present - otherwise returns the "note" object type
1544          *
1545          * @param array $item Data of the item that is to be posted
1546          * @return string Object type
1547          */
1548         private static function constructObjecttype(array $item): string
1549         {
1550                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1551                         return $item['object-type'];
1552                 }
1553
1554                 return Activity\ObjectType::NOTE;
1555         }
1556
1557         /**
1558          * Adds an entry element to the XML document
1559          *
1560          * @param DOMDocument $doc       XML document
1561          * @param array       $item      Data of the item that is to be posted
1562          * @param array       $owner     Contact data of the poster
1563          * @param bool        $toplevel  optional default false
1564          *
1565          * @return DOMElement Entry element
1566          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1567          * @throws \ImagickException
1568          */
1569         private static function entry(DOMDocument $doc, array $item, array $owner, bool $toplevel = false): DOMElement
1570         {
1571                 if ($item['verb'] == Activity::LIKE) {
1572                         return self::likeEntry($doc, $item, $owner, $toplevel);
1573                 } elseif (in_array($item['verb'], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1574                         return self::followEntry($doc, $item, $owner, $toplevel);
1575                 } else {
1576                         return self::noteEntry($doc, $item, $owner, $toplevel);
1577                 }
1578         }
1579
1580         /**
1581          * Adds an entry element with a "like"
1582          *
1583          * @param DOMDocument $doc      XML document
1584          * @param array       $item     Data of the item that is to be posted
1585          * @param array       $owner    Contact data of the poster
1586          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1587          * @return DOMElement Entry element with "like"
1588          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1589          * @throws \ImagickException
1590          */
1591         private static function likeEntry(DOMDocument $doc, array $item, array $owner, bool $toplevel): DOMElement
1592         {
1593                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item['author-link']) != Strings::normaliseLink($owner['url']))) {
1594                         Logger::info('OStatus entry is from author ' . $owner['url'] . ' - not from ' . $item['author-link'] . '. Quitting.');
1595                 }
1596
1597                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1598
1599                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . 'favorite';
1600                 self::entryContent($doc, $entry, $item, $owner, 'Favorite', $verb, false);
1601
1602                 $parent = Post::selectFirst([], ['uri' => $item['thr-parent'], 'uid' => $item['uid']]);
1603                 if (DBA::isResult($parent)) {
1604                         $as_object = $doc->createElement('activity:object');
1605
1606                         XML::addElement($doc, $as_object, 'activity:object-type', self::constructObjecttype($parent));
1607
1608                         self::entryContent($doc, $as_object, $parent, $owner, 'New entry');
1609
1610                         $entry->appendChild($as_object);
1611                 }
1612
1613                 self::entryFooter($doc, $entry, $item, $owner);
1614
1615                 return $entry;
1616         }
1617
1618         /**
1619          * Adds the person object element to the XML document
1620          *
1621          * @param DOMDocument $doc     XML document
1622          * @param array       $owner   Contact data of the poster
1623          * @param array       $contact Contact data of the target
1624          * @return DOMElement author element
1625          */
1626         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact): DOMElement
1627         {
1628                 $object = $doc->createElement('activity:object');
1629                 XML::addElement($doc, $object, 'activity:object-type', Activity\ObjectType::PERSON);
1630
1631                 if ($contact['network'] == Protocol::PHANTOM) {
1632                         XML::addElement($doc, $object, 'id', $contact['url']);
1633                         return $object;
1634                 }
1635
1636                 XML::addElement($doc, $object, 'id', $contact['alias']);
1637                 XML::addElement($doc, $object, 'title', $contact['nick']);
1638
1639                 XML::addElement($doc, $object, 'link', '', [
1640                         'rel' => 'alternate',
1641                         'type' => 'text/html',
1642                         'href' => $contact['url'],
1643                 ]);
1644
1645                 $attributes = [
1646                         'rel' => 'avatar',
1647                         'type' => 'image/jpeg', // To-Do?
1648                         'media:width' => 300,
1649                         'media:height' => 300,
1650                         'href' => $contact['photo'],
1651                 ];
1652                 XML::addElement($doc, $object, 'link', '', $attributes);
1653
1654                 XML::addElement($doc, $object, 'poco:preferredUsername', $contact['nick']);
1655                 XML::addElement($doc, $object, 'poco:displayName', $contact['name']);
1656
1657                 if (trim($contact['location']) != '') {
1658                         $element = $doc->createElement('poco:address');
1659                         XML::addElement($doc, $element, 'poco:formatted', $contact['location']);
1660                         $object->appendChild($element);
1661                 }
1662
1663                 return $object;
1664         }
1665
1666         /**
1667          * Adds a follow/unfollow entry element
1668          *
1669          * @param DOMDocument $doc      XML document
1670          * @param array       $item     Data of the follow/unfollow message
1671          * @param array       $owner    Contact data of the poster
1672          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1673          * @return DOMElement Entry element
1674          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1675          * @throws \ImagickException
1676          */
1677         private static function followEntry(DOMDocument $doc, array $item, array $owner, bool $toplevel): DOMElement
1678         {
1679                 $item['id'] = $item['parent'] = 0;
1680                 $item['created'] = $item['edited'] = date('c');
1681                 $item['private'] = Item::PRIVATE;
1682
1683                 $contact = Contact::getByURL($item['follow']);
1684                 $item['follow'] = $contact['url'];
1685
1686                 if ($contact['alias']) {
1687                         $item['follow'] = $contact['alias'];
1688                 } else {
1689                         $contact['alias'] = $contact['url'];
1690                 }
1691
1692                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact['url'])];
1693                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1694
1695                 if (DBA::isResult($user_contact)) {
1696                         $connect_id = $user_contact['id'];
1697                 } else {
1698                         $connect_id = 0;
1699                 }
1700
1701                 if ($item['verb'] == Activity::FOLLOW) {
1702                         $message = DI::l10n()->t('%s is now following %s.');
1703                         $title = DI::l10n()->t('following');
1704                         $action = 'subscription';
1705                 } else {
1706                         $message = DI::l10n()->t('%s stopped following %s.');
1707                         $title = DI::l10n()->t('stopped following');
1708                         $action = 'unfollow';
1709                 }
1710
1711                 $item['uri'] = $item['parent-uri'] = $item['thr-parent']
1712                                 = 'tag:' . DI::baseUrl()->getHostname().
1713                                 ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1714                                 ':person:'.$connect_id.':'.$item['created'];
1715
1716                 $item['body'] = sprintf($message, $owner['nick'], $contact['nick']);
1717
1718                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1719
1720                 self::entryContent($doc, $entry, $item, $owner, $title);
1721
1722                 $object = self::addPersonObject($doc, $owner, $contact);
1723                 $entry->appendChild($object);
1724
1725                 self::entryFooter($doc, $entry, $item, $owner);
1726
1727                 return $entry;
1728         }
1729
1730         /**
1731          * Adds a regular entry element
1732          *
1733          * @param DOMDocument $doc       XML document
1734          * @param array       $item      Data of the item that is to be posted
1735          * @param array       $owner     Contact data of the poster
1736          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1737          * @return DOMElement Entry element
1738          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1739          * @throws \ImagickException
1740          */
1741         private static function noteEntry(DOMDocument $doc, array $item, array $owner, bool $toplevel): DOMElement
1742         {
1743                 if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item['author-link']) != Strings::normaliseLink($owner['url']))) {
1744                         Logger::info('OStatus entry is from author ' . $owner['url'] . ' - not from ' . $item['author-link'] . '. Quitting.');
1745                 }
1746
1747                 if (!$toplevel) {
1748                         if (!empty($item['title'])) {
1749                                 $title = BBCode::convertForUriId($item['uri-id'], $item['title'], BBCode::OSTATUS);
1750                         } else {
1751                                 $title = sprintf('New note by %s', $owner['nick']);
1752                         }
1753                 } else {
1754                         $title = sprintf('New comment by %s', $owner['nick']);
1755                 }
1756
1757                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1758
1759                 XML::addElement($doc, $entry, 'activity:object-type', Activity\ObjectType::NOTE);
1760
1761                 self::entryContent($doc, $entry, $item, $owner, $title, '', true);
1762
1763                 self::entryFooter($doc, $entry, $item, $owner, true);
1764
1765                 return $entry;
1766         }
1767
1768         /**
1769          * Adds a header element to the XML document
1770          *
1771          * @param DOMDocument $doc      XML document
1772          * @param array       $owner    Contact data of the poster
1773          * @param array       $item
1774          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1775          * @return DOMElement The entry element where the elements are added
1776          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1777          * @throws \ImagickException
1778          */
1779         public static function entryHeader(DOMDocument $doc, array $owner, array $item, bool $toplevel): DOMElement
1780         {
1781                 if (!$toplevel) {
1782                         $entry = $doc->createElement('entry');
1783
1784                         if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1785                                 $contact = Contact::getByURL($item['author-link']) ?: $owner;
1786                                 $contact['nickname'] = $contact['nickname'] ?? $contact['nick'];
1787                                 $author = self::addAuthor($doc, $contact, false);
1788                                 $entry->appendChild($author);
1789                         }
1790                 } else {
1791                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, 'entry');
1792
1793                         $entry->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
1794                         $entry->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
1795                         $entry->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
1796                         $entry->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
1797                         $entry->setAttribute('xmlns:poco', ActivityNamespace::POCO);
1798                         $entry->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
1799                         $entry->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
1800                         $entry->setAttribute('xmlns:mastodon', ActivityNamespace::MASTODON);
1801
1802                         $author = self::addAuthor($doc, $owner);
1803                         $entry->appendChild($author);
1804                 }
1805
1806                 return $entry;
1807         }
1808
1809         /**
1810          * Adds elements to the XML document
1811          *
1812          * @param DOMDocument $doc       XML document
1813          * @param DOMElement  $entry     Entry element where the content is added
1814          * @param array       $item      Data of the item that is to be posted
1815          * @param array       $owner     Contact data of the poster
1816          * @param string      $title     Title for the post
1817          * @param string      $verb      The activity verb
1818          * @param bool        $complete  Add the "status_net" element?
1819          * @return void
1820          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1821          */
1822         private static function entryContent(DOMDocument $doc, DOMElement $entry, array $item, array $owner, string $title, string $verb = '', bool $complete = true)
1823         {
1824                 if ($verb == '') {
1825                         $verb = self::constructVerb($item);
1826                 }
1827
1828                 XML::addElement($doc, $entry, 'id', $item['uri']);
1829                 XML::addElement($doc, $entry, 'title', html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1830
1831                 $body = Post\Media::addAttachmentsToBody($item['uri-id'], $item['body']);
1832                 $body = self::formatPicturePost($body, $item['uri-id']);
1833
1834                 if (!empty($item['title'])) {
1835                         $body = '[b]' . $item['title'] . "[/b]\n\n" . $body;
1836                 }
1837
1838                 $body = BBCode::convertForUriId($item['uri-id'], $body, BBCode::OSTATUS);
1839
1840                 XML::addElement($doc, $entry, 'content', $body, ['type' => 'html']);
1841
1842                 XML::addElement($doc, $entry, 'link', '', [
1843                         'rel' => 'alternate',
1844                         'type' => 'text/html',
1845                         'href' => DI::baseUrl() . '/display/' . $item['guid'],
1846                 ]);
1847
1848                 if ($complete && ($item['id'] > 0)) {
1849                         XML::addElement($doc, $entry, 'status_net', '', ['notice_id' => $item['id']]);
1850                 }
1851
1852                 XML::addElement($doc, $entry, 'activity:verb', $verb);
1853
1854                 XML::addElement($doc, $entry, 'published', DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM));
1855                 XML::addElement($doc, $entry, 'updated', DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM));
1856         }
1857
1858         /**
1859          * Adds the elements at the foot of an entry to the XML document
1860          *
1861          * @param DOMDocument $doc       XML document
1862          * @param object      $entry     The entry element where the elements are added
1863          * @param array       $item      Data of the item that is to be posted
1864          * @param array       $owner     Contact data of the poster
1865          * @param bool        $complete  default true
1866          * @return void
1867          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1868          */
1869         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, bool $complete = true)
1870         {
1871                 $mentioned = [];
1872
1873                 if ($item['gravity'] != GRAVITY_PARENT) {
1874                         $parent = Post::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1875
1876                         $thrparent = Post::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner['uid'], 'uri' => $item['thr-parent']]);
1877
1878                         if (DBA::isResult($thrparent)) {
1879                                 $mentioned[$thrparent['author-link']] = $thrparent['author-link'];
1880                                 $mentioned[$thrparent['owner-link']]  = $thrparent['owner-link'];
1881                                 $parent_plink                         = $thrparent['plink'];
1882                         } elseif (DBA::isResult($parent)) {
1883                                 $mentioned[$parent['author-link']] = $parent['author-link'];
1884                                 $mentioned[$parent['owner-link']]  = $parent['owner-link'];
1885                                 $parent_plink                      = DI::baseUrl() . '/display/' . $parent['guid'];
1886                         } else {
1887                                 DI::logger()->notice('Missing parent and thr-parent for child item', ['item' => $item]);
1888                         }
1889
1890                         if (isset($parent_plink)) {
1891                                 $attributes = [
1892                                         'ref'  => $item['thr-parent'],
1893                                         'href' => $parent_plink];
1894                                 XML::addElement($doc, $entry, 'thr:in-reply-to', '', $attributes);
1895
1896                                 $attributes = [
1897                                         'rel'  => 'related',
1898                                         'href' => $parent_plink];
1899                                 XML::addElement($doc, $entry, 'link', '', $attributes);
1900                         }
1901                 }
1902
1903                 if (intval($item['parent']) > 0) {
1904                         $conversation_href = $conversation_uri = str_replace('/objects/', '/context/', $item['thr-parent']);
1905
1906                         if (isset($parent_item)) {
1907                                 $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $parent_item]);
1908                                 if (DBA::isResult($conversation)) {
1909                                         if ($conversation['conversation-uri'] != '') {
1910                                                 $conversation_uri = $conversation['conversation-uri'];
1911                                         }
1912                                         if ($conversation['conversation-href'] != '') {
1913                                                 $conversation_href = $conversation['conversation-href'];
1914                                         }
1915                                 }
1916                         }
1917
1918                         XML::addElement($doc, $entry, 'link', '', ['rel' => 'ostatus:conversation', 'href' => $conversation_href]);
1919
1920                         $attributes = [
1921                                 'href' => $conversation_href,
1922                                 'local_id' => $item['parent'],
1923                                 'ref' => $conversation_uri,
1924                         ];
1925
1926                         XML::addElement($doc, $entry, 'ostatus:conversation', $conversation_uri, $attributes);
1927                 }
1928
1929                 // uri-id isn't present for follow entry pseudo-items
1930                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
1931                 foreach ($tags as $tag) {
1932                         $mentioned[$tag['url']] = $tag['url'];
1933                 }
1934
1935                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
1936                 $newmentions = [];
1937                 foreach ($mentioned as $mention) {
1938                         $newmentions[str_replace('http://', 'https://', $mention)] = str_replace('http://', 'https://', $mention);
1939                         $newmentions[str_replace('https://', 'http://', $mention)] = str_replace('https://', 'http://', $mention);
1940                 }
1941                 $mentioned = $newmentions;
1942
1943                 foreach ($mentioned as $mention) {
1944                         $contact = Contact::getByURL($mention, false, ['contact-type']);
1945                         if (!empty($contact) && ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1946                                 XML::addElement($doc, $entry, 'link', '', [
1947                                         'rel' => 'mentioned',
1948                                         'ostatus:object-type' => Activity\ObjectType::GROUP,
1949                                         'href' => $mention,
1950                                 ]);
1951                         } else {
1952                                 XML::addElement($doc, $entry, 'link', '', [
1953                                         'rel' => 'mentioned',
1954                                         'ostatus:object-type' => Activity\ObjectType::PERSON,
1955                                                 'href' => $mention,
1956                                 ]);
1957                         }
1958                 }
1959
1960                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1961                         XML::addElement($doc, $entry, 'link', '', [
1962                                 'rel' => 'mentioned',
1963                                 'ostatus:object-type' => 'http://activitystrea.ms/schema/1.0/group',
1964                                 'href' => $owner['url']
1965                         ]);
1966                 }
1967
1968                 if ($item['private'] != Item::PRIVATE) {
1969                         XML::addElement($doc, $entry, 'link', '', ['rel' => 'ostatus:attention',
1970                                                                         'href' => 'http://activityschema.org/collection/public']);
1971                         XML::addElement($doc, $entry, 'link', '', ['rel' => 'mentioned',
1972                                                                         'ostatus:object-type' => 'http://activitystrea.ms/schema/1.0/collection',
1973                                                                         'href' => 'http://activityschema.org/collection/public']);
1974                         XML::addElement($doc, $entry, 'mastodon:scope', 'public');
1975                 }
1976
1977                 foreach ($tags as $tag) {
1978                         if ($tag['type'] == Tag::HASHTAG) {
1979                                 XML::addElement($doc, $entry, 'category', '', ['term' => $tag['name']]);
1980                         }
1981                 }
1982
1983                 self::getAttachment($doc, $entry, $item);
1984
1985                 if ($complete && ($item['id'] > 0)) {
1986                         $app = $item['app'];
1987                         if ($app == '') {
1988                                 $app = 'web';
1989                         }
1990
1991                         $attributes = ['local_id' => $item['id'], 'source' => $app];
1992
1993                         if (isset($parent['id'])) {
1994                                 $attributes['repeat_of'] = $parent['id'];
1995                         }
1996
1997                         if ($item['coord'] != '') {
1998                                 XML::addElement($doc, $entry, 'georss:point', $item['coord']);
1999                         }
2000
2001                         XML::addElement($doc, $entry, 'statusnet:notice_info', '', $attributes);
2002                 }
2003         }
2004
2005         /**
2006          * Creates the XML feed for a given nickname
2007          *
2008          * Supported filters:
2009          * - activity (default): all the public posts
2010          * - posts: all the public top-level posts
2011          * - comments: all the public replies
2012          *
2013          * Updates the provided last_update parameter if the result comes from the
2014          * cache or it is empty
2015          *
2016          * @param string  $owner_nick  Nickname of the feed owner
2017          * @param string  $last_update Date of the last update
2018          * @param integer $max_items   Number of maximum items to fetch
2019          * @param string  $filter      Feed items filter (activity, posts or comments)
2020          * @param boolean $nocache     Wether to bypass caching
2021          * @return string XML feed or empty string on error
2022          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2023          * @throws \ImagickException
2024          */
2025         public static function feed(string $owner_nick, string &$last_update, int $max_items = 300, string $filter = 'activity', bool $nocache = false): string
2026         {
2027                 $stamp = microtime(true);
2028
2029                 $owner = User::getOwnerDataByNick($owner_nick);
2030                 if (!$owner) {
2031                         return '';
2032                 }
2033
2034                 $cachekey = 'ostatus:feed:' . $owner_nick . ':' . $filter . ':' . $last_update;
2035
2036                 $previous_created = $last_update;
2037
2038                 // Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
2039                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
2040                         $result = DI::cache()->get($cachekey);
2041                         if (!$nocache && !is_null($result)) {
2042                                 Logger::info('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)');
2043                                 $last_update = $result['last_update'];
2044                                 return $result['feed'];
2045                         }
2046                 }
2047
2048                 if (!strlen($last_update)) {
2049                         $last_update = 'now -30 days';
2050                 }
2051
2052                 $check_date = DateTimeFormat::utc($last_update);
2053                 $authorid = Contact::getIdForURL($owner['url']);
2054
2055                 $condition = [
2056                         "`uid` = ? AND `received` > ? AND NOT `deleted` AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
2057                         $owner['uid'],
2058                         $check_date,
2059                         Item::PRIVATE,
2060                         Protocol::OSTATUS,
2061                         Protocol::DFRN,
2062                 ];
2063
2064                 if ($filter === 'comments') {
2065                         $condition[0] .= " AND `object-type` = ? ";
2066                         $condition[] = Activity\ObjectType::COMMENT;
2067                 }
2068
2069                 if ($owner['contact-type'] != Contact::TYPE_COMMUNITY) {
2070                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
2071                         $condition[] = $owner['id'];
2072                         $condition[] = $authorid;
2073                 }
2074
2075                 $params = ['order' => ['received' => true], 'limit' => $max_items];
2076
2077                 if ($filter === 'posts') {
2078                         $ret = Post::selectThread([], $condition, $params);
2079                 } else {
2080                         $ret = Post::select([], $condition, $params);
2081                 }
2082
2083                 $items = Post::toArray($ret);
2084
2085                 $doc = new DOMDocument('1.0', 'utf-8');
2086                 $doc->formatOutput = true;
2087
2088                 $root = self::addHeader($doc, $owner, $filter);
2089
2090                 foreach ($items as $item) {
2091                         if (DI::config()->get('system', 'ostatus_debug')) {
2092                                 $item['body'] .= '🍼';
2093                         }
2094
2095                         if (in_array($item['verb'], [Activity::FOLLOW, Activity::O_UNFOLLOW, Activity::LIKE])) {
2096                                 continue;
2097                         }
2098
2099                         $entry = self::entry($doc, $item, $owner, false);
2100                         $root->appendChild($entry);
2101
2102                         if ($last_update < $item['created']) {
2103                                 $last_update = $item['created'];
2104                         }
2105                 }
2106
2107                 $feeddata = trim($doc->saveXML());
2108
2109                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
2110                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
2111
2112                 Logger::info('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created);
2113
2114                 return $feeddata;
2115         }
2116
2117         /**
2118          * Creates the XML for a salmon message
2119          *
2120          * @param array $item  Data of the item that is to be posted
2121          * @param array $owner Contact data of the poster
2122          *
2123          * @return string XML for the salmon
2124          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2125          * @throws \ImagickException
2126          */
2127         public static function salmon(array $item, array $owner): string
2128         {
2129                 $doc = new DOMDocument('1.0', 'utf-8');
2130                 $doc->formatOutput = true;
2131
2132                 if (DI::config()->get('system', 'ostatus_debug')) {
2133                         $item['body'] .= '🐟';
2134                 }
2135
2136                 $entry = self::entry($doc, $item, $owner, true);
2137
2138                 $doc->appendChild($entry);
2139
2140                 return trim($doc->saveXML());
2141         }
2142
2143         /**
2144          * Checks if the given contact url does support OStatus
2145          *
2146          * @param string  $url    profile url
2147          * @return boolean
2148          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2149          * @throws \ImagickException
2150          */
2151         public static function isSupportedByContactUrl(string $url): bool
2152         {
2153                 $probe = Probe::uri($url, Protocol::OSTATUS);
2154                 return $probe['network'] == Protocol::OSTATUS;
2155         }
2156 }