src/Protocol/OStatus.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, 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\App;
  28 use Friendica\Content\Text\BBCode;
  29 use Friendica\Content\Text\HTML;
  30 use Friendica\Core\Cache\Enum\Duration;
  31 use Friendica\Core\Logger;
  32 use Friendica\Core\Protocol;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Model\APContact;
  36 use Friendica\Model\Contact;
  37 use Friendica\Model\Conversation;
  38 use Friendica\Model\Item;
  39 use Friendica\Model\ItemURI;
  40 use Friendica\Model\Post;
  41 use Friendica\Model\Tag;
  42 use Friendica\Model\User;
  43 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
  44 use Friendica\Network\Probe;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Proxy;
  48 use Friendica\Util\Strings;
  49 use Friendica\Util\XML;
  50
  51 /**
  52  * This class contain functions for the OStatus protocol
  53  */
  54 class OStatus
  55 {
  56         private static $itemlist;
  57         private static $conv_list = [];
  58
  59         /**
  60          * Fetches author data
  61          *
  62          * @param DOMXPath $xpath     The xpath object
  63          * @param object   $context   The xml context of the author details
  64          * @param array    $importer  user record of the importing user
  65          * @param array    $contact   Called by reference, will contain the fetched contact
  66          * @param bool     $onlyfetch Only fetch the header without updating the contact entries
  67          *
  68          * @return array Array of author related entries for the item
  69          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  70          * @throws \ImagickException
  71          */
  72         private static function fetchAuthor(DOMXPath $xpath, $context, array $importer, array &$contact = null, bool $onlyfetch): array
  73         {
  74                 $author = [];
  75                 $author['author-link'] = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
  76                 $author['author-name'] = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $context);
  77                 $addr = XML::getFirstNodeValue($xpath, 'atom:author/atom:email/text()', $context);
  78
  79                 $aliaslink = $author['author-link'];
  80
  81                 $alternate_item = $xpath->query("atom:author/atom:link[@rel='alternate']", $context)->item(0);
  82                 if (is_object($alternate_item)) {
  83                         foreach ($alternate_item->attributes as $attributes) {
  84                                 if (($attributes->name == 'href') && ($attributes->textContent != '')) {
  85                                         $author['author-link'] = $attributes->textContent;
  86                                 }
  87                         }
  88                 }
  89                 $author['author-id'] = Contact::getIdForURL($author['author-link']);
  90
  91                 $author['contact-id'] = ($contact['id'] ?? 0) ?: $author['author-id'];
  92
  93                 $contact = [];
  94
  95 /*
  96                 This here would be better, but we would get problems with contacts from the statusnet addon
  97                 This is kept here as a reminder for the future
  98
  99                 $cid = Contact::getIdForURL($author['author-link'], $importer['uid']);
 100                 if ($cid) {
 101                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
 102                 }
 103 */
 104                 if ($aliaslink != '') {
 105                         $contact = DBA::selectFirst('contact', [], [
 106                                 "`uid` = ? AND `alias` = ? AND `rel` IN (?, ?)",
 107                                 $importer['uid'],
 108                                 $aliaslink,
 109                                 Contact::SHARING, Contact::FRIEND,
 110                         ]);
 111                 }
 112
 113                 if (!DBA::isResult($contact) && $author['author-link'] != '') {
 114                         if ($aliaslink == '') {
 115                                 $aliaslink = $author['author-link'];
 116                         }
 117
 118                         $contact = DBA::selectFirst('contact', [], [
 119                                 "`uid` = ? AND `nurl` IN (?, ?) AND `rel` IN (?, ?)",
 120                                 $importer['uid'],
 121                                 Strings::normaliseLink($author['author-link']),
 122                                 Strings::normaliseLink($aliaslink),
 123                                 Contact::SHARING,
 124                                 Contact::FRIEND,
 125                         ]);
 126                 }
 127
 128                 if (!DBA::isResult($contact) && ($addr != '')) {
 129                         $contact = DBA::selectFirst('contact', [], [
 130                                 "`uid` = ? AND `addr` = ? AND `rel` IN (?, ?)",
 131                                 $importer['uid'],
 132                                 $addr,
 133                                 Contact::SHARING,
 134                                 Contact::FRIEND,
 135                         ]);
 136                 }
 137
 138                 if (DBA::isResult($contact)) {
 139                         if ($contact['blocked']) {
 140                                 $contact['id'] = -1;
 141                         } elseif (!empty(APContact::getByURL($contact['url'], false))) {
 142                                 ActivityPub\Receiver::switchContact($contact['id'], $importer['uid'], $contact['url']);
 143                         }
 144                         $author['contact-id'] = $contact['id'];
 145                 }
 146
 147                 $avatarlist = [];
 148                 $avatars = $xpath->query("atom:author/atom:link[@rel='avatar']", $context);
 149                 foreach ($avatars as $avatar) {
 150                         $href = '';
 151                         $width = 0;
 152                         foreach ($avatar->attributes as $attributes) {
 153                                 if ($attributes->name == 'href') {
 154                                         $href = $attributes->textContent;
 155                                 }
 156                                 if ($attributes->name == 'width') {
 157                                         $width = $attributes->textContent;
 158                                 }
 159                         }
 160                         if ($href != '') {
 161                                 $avatarlist[$width] = $href;
 162                         }
 163                 }
 164                 if (count($avatarlist) > 0) {
 165                         krsort($avatarlist);
 166                         $author['author-avatar'] = Probe::fixAvatar(current($avatarlist), $author['author-link']);
 167                 }
 168
 169                 $displayname = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 170                 if ($displayname != '') {
 171                         $author['author-name'] = $displayname;
 172                 }
 173
 174                 $author['owner-id'] = $author['author-id'];
 175
 176                 // Only update the contacts if it is an OStatus contact
 177                 if (DBA::isResult($contact) && ($contact['id'] > 0) && !$onlyfetch && ($contact['network'] == Protocol::OSTATUS)) {
 178
 179                         // Update contact data
 180                         $current = $contact;
 181                         unset($current['name-date']);
 182
 183                         // This query doesn't seem to work
 184                         // $value = $xpath->query("atom:link[@rel='salmon']", $context)->item(0)->nodeValue;
 185                         // if ($value != "")
 186                         //      $contact["notify"] = $value;
 187
 188                         // This query doesn't seem to work as well - I hate these queries
 189                         // $value = $xpath->query("atom:link[@rel='self' and @type='application/atom+xml']", $context)->item(0)->nodeValue;
 190                         // if ($value != "")
 191                         //      $contact["poll"] = $value;
 192
 193                         $contact['url'] = $author['author-link'];
 194                         $contact['nurl'] = Strings::normaliseLink($contact['url']);
 195
 196                         $value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
 197                         if ($value != '') {
 198                                 $contact['alias'] = $value;
 199                         }
 200
 201                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 202                         if ($value != '') {
 203                                 $contact['name'] = $value;
 204                         }
 205
 206                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 207                         if ($value != '') {
 208                                 $contact['nick'] = $value;
 209                         }
 210
 211                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()', $context);
 212                         if ($value != '') {
 213                                 $contact['about'] = HTML::toBBCode($value);
 214                         }
 215
 216                         $value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()', $context);
 217                         if ($value != '') {
 218                                 $contact['location'] = $value;
 219                         }
 220
 221                         $contact['name-date'] = DateTimeFormat::utcNow();
 222
 223                         Contact::update($contact, ['id' => $contact['id']], $current);
 224
 225                         if (!empty($author['author-avatar']) && ($author['author-avatar'] != $current['avatar'])) {
 226                                 Logger::info('Update profile picture for contact ' . $contact['id']);
 227                                 Contact::updateAvatar($contact['id'], $author['author-avatar']);
 228                         }
 229
 230                         // Ensure that we are having this contact (with uid=0)
 231                         $cid = Contact::getIdForURL($aliaslink);
 232
 233                         if ($cid) {
 234                                 $fields = ['url', 'nurl', 'name', 'nick', 'alias', 'about', 'location'];
 235                                 $old_contact = DBA::selectFirst('contact', $fields, ['id' => $cid]);
 236
 237                                 // Update it with the current values
 238                                 $fields = [
 239                                         'url' => $author['author-link'],
 240                                         'name' => $contact['name'],
 241                                         'nurl' => Strings::normaliseLink($author['author-link']),
 242                                         'nick' => $contact['nick'],
 243                                         'alias' => $contact['alias'],
 244                                         'about' => $contact['about'],
 245                                         'location' => $contact['location'],
 246                                         'success_update' => DateTimeFormat::utcNow(),
 247                                         'last-update' => DateTimeFormat::utcNow(),
 248                                 ];
 249
 250                                 Contact::update($fields, ['id' => $cid], $old_contact);
 251
 252                                 // Update the avatar
 253                                 if (!empty($author['author-avatar'])) {
 254                                         Contact::updateAvatar($cid, $author['author-avatar']);
 255                                 }
 256                         }
 257                 } elseif (empty($contact['network']) || ($contact['network'] != Protocol::DFRN)) {
 258                         $contact = [];
 259                 }
 260
 261                 return $author;
 262         }
 263
 264         /**
 265          * Fetches author data from a given XML string
 266          *
 267          * @param string $xml      The XML
 268          * @param array  $importer user record of the importing user
 269          *
 270          * @return array Array of author related entries for the item
 271          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 272          * @throws \ImagickException
 273          */
 274         public static function salmonAuthor(string $xml, array $importer): array
 275         {
 276                 if (empty($xml)) {
 277                         return [];
 278                 }
 279
 280                 $doc = new DOMDocument();
 281                 @$doc->loadXML($xml);
 282
 283                 $xpath = new DOMXPath($doc);
 284                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 285                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 286                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 287                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 288                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 289                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 290                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 291                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 292
 293                 $contact = ['id' => 0];
 294
 295                 // Fetch the first author
 296                 $authordata = $xpath->query('//author')->item(0);
 297                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, true);
 298                 return $author;
 299         }
 300
 301         /**
 302          * Read attributes from element
 303          *
 304          * @param object $element Element object
 305          * @return array attributes
 306          */
 307         private static function readAttributes($element): array
 308         {
 309                 $attribute = [];
 310
 311                 foreach ($element->attributes as $attributes) {
 312                         $attribute[$attributes->name] = $attributes->textContent;
 313                 }
 314
 315                 return $attribute;
 316         }
 317
 318         /**
 319          * Imports an XML string containing OStatus elements
 320          *
 321          * @param string $xml      The XML
 322          * @param array  $importer user record of the importing user
 323          * @param array  $contact  contact
 324          * @param string $hub      Called by reference, returns the fetched hub data
 325          * @return void
 326          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 327          * @throws \ImagickException
 328          */
 329         public static function import($xml, array $importer, array &$contact, &$hub)
 330         {
 331                 self::process($xml, $importer, $contact, $hub, false, true, Conversation::PUSH);
 332         }
 333
 334         /**
 335          * Internal feed processing
 336          *
 337          * @param string  $xml        The XML
 338          * @param array   $importer   user record of the importing user
 339          * @param array   $contact    contact
 340          * @param string  $hub        Called by reference, returns the fetched hub data
 341          * @param boolean $stored     Is the post fresh imported or from the database?
 342          * @param boolean $initialize Is it the leading post so that data has to be initialized?
 343          * @param integer $direction  Direction, default UNKNOWN(0)
 344          * @return boolean Could the XML be processed?
 345          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 346          * @throws \ImagickException
 347          */
 348         private static function process(string $xml, array $importer, array &$contact = null, string &$hub, bool $stored = false, bool $initialize = true, int $direction = Conversation::UNKNOWN)
 349         {
 350                 if ($initialize) {
 351                         self::$itemlist = [];
 352                         self::$conv_list = [];
 353                 }
 354
 355                 Logger::info('Import OStatus message for user ' . $importer['uid']);
 356
 357                 if (empty($xml)) {
 358                         return false;
 359                 }
 360
 361                 $doc = new DOMDocument();
 362                 @$doc->loadXML($xml);
 363
 364                 $xpath = new DOMXPath($doc);
 365                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
 366                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
 367                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
 368                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
 369                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
 370                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 371                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
 372                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
 373
 374                 $hub = '';
 375                 $hub_items = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0);
 376                 if (is_object($hub_items)) {
 377                         $hub_attributes = $hub_items->attributes;
 378                         if (is_object($hub_attributes)) {
 379                                 foreach ($hub_attributes as $hub_attribute) {
 380                                         if ($hub_attribute->name == 'href') {
 381                                                 $hub = $hub_attribute->textContent;
 382                                                 Logger::info('Found hub ', ['hub' => $hub]);
 383                                         }
 384                                 }
 385                         }
 386                 }
 387
 388                 // Initial header elements
 389                 $header = [
 390                         'uid'     => $importer['uid'],
 391                         'network' => Protocol::OSTATUS,
 392                         'wall'    => 0,
 393                         'origin'  => 0,
 394                         'gravity' => Item::GRAVITY_COMMENT,
 395                 ];
 396
 397                 if (!is_object($doc->firstChild) || empty($doc->firstChild->tagName)) {
 398                         return false;
 399                 }
 400
 401                 $first_child = $doc->firstChild->tagName;
 402
 403                 if ($first_child == 'feed') {
 404                         $entries = $xpath->query('/atom:feed/atom:entry');
 405                 } else {
 406                         $entries = $xpath->query('/atom:entry');
 407                 }
 408
 409                 if ($entries->length == 1) {
 410                         // We reformat the XML to make it better readable
 411                         $doc2 = new DOMDocument();
 412                         $doc2->loadXML($xml);
 413                         $doc2->preserveWhiteSpace = false;
 414                         $doc2->formatOutput = true;
 415                         $xml2 = $doc2->saveXML();
 416
 417                         $header['protocol'] = Conversation::PARCEL_SALMON;
 418                         $header['source'] = $xml2;
 419                         $header['direction'] = $direction;
 420                 } elseif (!$initialize) {
 421                         return false;
 422                 }
 423
 424                 // Fetch the first author
 425                 $authordata = $xpath->query('//author')->item(0);
 426                 $author = self::fetchAuthor($xpath, $authordata, $importer, $contact, $stored);
 427
 428                 // Reverse the order of the entries
 429                 $entrylist = [];
 430
 431                 foreach ($entries as $entry) {
 432                         $entrylist[] = $entry;
 433                 }
 434
 435                 foreach (array_reverse($entrylist) as $entry) {
 436                         // fetch the author
 437                         $authorelement = $xpath->query('/atom:entry/atom:author', $entry);
 438
 439                         if ($authorelement->length == 0) {
 440                                 $authorelement = $xpath->query('atom:author', $entry);
 441                         }
 442
 443                         if ($authorelement->length > 0) {
 444                                 $author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 445                         }
 446
 447                         $item = array_merge($header, $author);
 448
 449                         $item['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 450                         $item['uri-id'] = ItemURI::insert(['uri' => $item['uri']]);
 451
 452                         $item['verb'] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
 453
 454                         // Delete a message
 455                         if (in_array($item['verb'], ['qvitter-delete-notice', Activity::DELETE, 'delete'])) {
 456                                 self::deleteNotice($item);
 457                                 continue;
 458                         }
 459
 460                         if (in_array($item['verb'], [Activity::O_UNFAVOURITE, Activity::UNFAVORITE])) {
 461                                 // Ignore "Unfavorite" message
 462                                 Logger::info('Ignore unfavorite message ', ['item' => $item]);
 463                                 continue;
 464                         }
 465
 466                         // Deletions come with the same uri, so we check for duplicates after processing deletions
 467                         if (Post::exists(['uid' => $importer['uid'], 'uri' => $item['uri']])) {
 468                                 Logger::info('Post with URI ' . $item['uri'] . ' already existed for user ' . $importer['uid'] . '.');
 469                                 continue;
 470                         } else {
 471                                 Logger::info('Processing post with URI ' .  $item['uri'] . ' for user ' . $importer['uid'] . '.');
 472                         }
 473
 474                         if ($item['verb'] == Activity::JOIN) {
 475                                 // ignore "Join" messages
 476                                 Logger::info('Ignore join message ', ['item' => $item]);
 477                                 continue;
 478                         }
 479
 480                         if ($item['verb'] == 'http://mastodon.social/schema/1.0/block') {
 481                                 // ignore mastodon "block" messages
 482                                 Logger::info('Ignore block message ', ['item' => $item]);
 483                                 continue;
 484                         }
 485
 486                         if ($item['verb'] == Activity::FOLLOW) {
 487                                 Contact::addRelationship($importer, $contact, $item);
 488                                 continue;
 489                         }
 490
 491                         if ($item['verb'] == Activity::O_UNFOLLOW) {
 492                                 $dummy = null;
 493                                 Contact::removeFollower($contact);
 494                                 continue;
 495                         }
 496
 497                         if ($item['verb'] == Activity::FAVORITE) {
 498                                 $orig_uri = $xpath->query('activity:object/atom:id', $entry)->item(0)->nodeValue;
 499                                 Logger::notice('Favorite', ['uri' => $orig_uri, 'item' => $item]);
 500
 501                                 $item['body'] = $item['verb'] = Activity::LIKE;
 502                                 $item['thr-parent'] = $orig_uri;
 503                                 $item['gravity'] = Item::GRAVITY_ACTIVITY;
 504                                 $item['object-type'] = Activity\ObjectType::NOTE;
 505                         }
 506
 507                         // http://activitystrea.ms/schema/1.0/rsvp-yes
 508                         if (!in_array($item['verb'], [Activity::POST, Activity::LIKE, Activity::SHARE])) {
 509                                 Logger::info('Unhandled verb', ['verb' => $item['verb'], 'item' => $item]);
 510                         }
 511
 512                         self::processPost($xpath, $entry, $item, $importer);
 513
 514                         if ($initialize && (count(self::$itemlist) > 0)) {
 515                                 if (self::$itemlist[0]['uri'] == self::$itemlist[0]['thr-parent']) {
 516                                         $uid = self::$itemlist[0]['uid'];
 517                                         // We will import it everytime, when it is started by our contacts
 518                                         $valid = Contact::isSharingByURL(self::$itemlist[0]['author-link'], $uid);
 519
 520                                         if (!$valid) {
 521                                                 // If not, then it depends on this setting
 522                                                 $valid = !$uid || DI::pConfig()->get($uid, 'system', 'accept_only_sharer') != Item::COMPLETION_NONE;
 523
 524                                                 if ($valid) {
 525                                                         Logger::info('Item with URI ' . self::$itemlist[0]['uri'] . ' will be imported due to the system settings.');
 526                                                 }
 527                                         } else {
 528                                                 Logger::info('Item with URI ' . self::$itemlist[0]['uri'] . ' belongs to a contact (' . self::$itemlist[0]['contact-id'] . '). It will be imported.');
 529                                         }
 530
 531                                         if ($valid && DI::pConfig()->get($uid, 'system', 'accept_only_sharer') != Item::COMPLETION_LIKE) {
 532                                                 // Never post a thread when the only interaction by our contact was a like
 533                                                 $valid = false;
 534                                                 $verbs = [Activity::POST, Activity::SHARE];
 535                                                 foreach (self::$itemlist as $item) {
 536                                                         if (in_array($item['verb'], $verbs) && Contact::isSharingByURL($item['author-link'], $item['uid'])) {
 537                                                                 $valid = true;
 538                                                         }
 539                                                 }
 540                                                 if ($valid) {
 541                                                         Logger::info('Item with URI ' . self::$itemlist[0]['uri'] . ' will be imported since the thread contains posts or shares.');
 542                                                 }
 543                                         }
 544                                 } else {
 545                                         $valid = true;
 546                                 }
 547
 548                                 if ($valid) {
 549                                         $default_contact = 0;
 550                                         for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
 551                                                 if (empty(self::$itemlist[$key]['contact-id'])) {
 552                                                         self::$itemlist[$key]['contact-id'] = $default_contact;
 553                                                 } else {
 554                                                         $default_contact = $item['contact-id'];
 555                                                 }
 556                                         }
 557                                         foreach (self::$itemlist as $item) {
 558                                                 $found = Post::exists(['uid' => $importer['uid'], 'uri' => $item['uri']]);
 559                                                 if ($found) {
 560                                                         Logger::notice('Item with URI ' . $item['uri'] . ' for user ' . $importer['uid'] . ' already exists.');
 561                                                 } elseif ($item['contact-id'] < 0) {
 562                                                         Logger::notice('Item with URI ' . $item['uri'] . ' is from a blocked contact.');
 563                                                 } else {
 564                                                         $ret = Item::insert($item);
 565                                                         Logger::info('Item with URI ' . $item['uri'] . ' for user ' . $importer['uid'] . ' stored. Return value: ' . $ret);
 566                                                 }
 567                                         }
 568                                 }
 569                                 self::$itemlist = [];
 570                         }
 571                         Logger::info('Processing done for post with URI ' . $item['uri'] . ' for user '.$importer['uid'] . '.');
 572                 }
 573                 return true;
 574         }
 575
 576         /**
 577          * Removes notice item from database
 578          *
 579          * @param array $item item
 580          * @return void
 581          * @throws \Exception
 582          */
 583         private static function deleteNotice(array $item)
 584         {
 585                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'uri' => $item['uri']];
 586                 if (!Post::exists($condition)) {
 587                         Logger::notice('Item from ' . $item['author-link'] . ' with uri ' . $item['uri'] . ' for user ' . $item['uid'] . " wasn't found. We don't delete it.");
 588                         return;
 589                 }
 590
 591                 Item::markForDeletion($condition);
 592
 593                 Logger::notice('Deleted item with URI ' . $item['uri'] . ' for user ' . $item['uid']);
 594         }
 595
 596         /**
 597          * Processes the XML for a post
 598          *
 599          * @param DOMXPath $xpath    The xpath object
 600          * @param object   $entry    The xml entry that is processed
 601          * @param array    $item     The item array
 602          * @param array    $importer user record of the importing user
 603          * @return void
 604          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 605          * @throws \ImagickException
 606          */
 607         private static function processPost(DOMXPath $xpath, $entry, array &$item, array $importer)
 608         {
 609                 $item['body'] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
 610                 $item['object-type'] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 611                 if (($item['object-type'] == Activity\ObjectType::BOOKMARK) || ($item['object-type'] == Activity\ObjectType::EVENT)) {
 612                         $item['title'] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 613                         $item['body'] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 614                 } elseif ($item['object-type'] == Activity\ObjectType::QUESTION) {
 615                         $item['title'] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 616                 }
 617
 618                 $item['created'] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
 619                 $item['edited'] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
 620                 $item['conversation'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 621
 622                 $conv = $xpath->query('ostatus:conversation', $entry);
 623                 if (is_object($conv->item(0))) {
 624                         foreach ($conv->item(0)->attributes as $attributes) {
 625                                 if ($attributes->name == 'ref') {
 626                                         $item['conversation'] = $attributes->textContent;
 627                                 }
 628                                 if ($attributes->name == 'href') {
 629                                         $item['conversation'] = $attributes->textContent;
 630                                 }
 631                         }
 632                 }
 633
 634                 $related = '';
 635
 636                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
 637                 if (is_object($inreplyto->item(0))) {
 638                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 639                                 if ($attributes->name == 'ref') {
 640                                         $item['thr-parent'] = $attributes->textContent;
 641                                 }
 642                                 if ($attributes->name == 'href') {
 643                                         $related = $attributes->textContent;
 644                                 }
 645                         }
 646                 }
 647
 648                 $georsspoint = $xpath->query('georss:point', $entry);
 649                 if (!empty($georsspoint) && ($georsspoint->length > 0)) {
 650                         $item['coord'] = $georsspoint->item(0)->nodeValue;
 651                 }
 652
 653                 $categories = $xpath->query('atom:category', $entry);
 654                 if ($categories) {
 655                         foreach ($categories as $category) {
 656                                 foreach ($category->attributes as $attributes) {
 657                                         if ($attributes->name == 'term') {
 658                                                 // Store the hashtag
 659                                                 Tag::store($item['uri-id'], Tag::HASHTAG, $attributes->textContent);
 660                                         }
 661                                 }
 662                         }
 663                 }
 664
 665                 $self = '';
 666                 $add_body = '';
 667
 668                 $links = $xpath->query('atom:link', $entry);
 669                 if ($links) {
 670                         $link_data = self::processLinks($links, $item);
 671                         $self = $link_data['self'];
 672                         $add_body = $link_data['add_body'];
 673                 }
 674
 675                 $repeat_of = '';
 676
 677                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
 678                 if ($notice_info && ($notice_info->length > 0)) {
 679                         foreach ($notice_info->item(0)->attributes as $attributes) {
 680                                 if ($attributes->name == 'source') {
 681                                         $item['app'] = strip_tags($attributes->textContent);
 682                                 }
 683                                 if ($attributes->name == 'repeat_of') {
 684                                         $repeat_of = $attributes->textContent;
 685                                 }
 686                         }
 687                 }
 688                 // Is it a repeated post?
 689                 if (($repeat_of != '') || ($item['verb'] == Activity::SHARE)) {
 690                         $link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
 691                         if (!empty($link_data['add_body'])) {
 692                                 $add_body .= $link_data['add_body'];
 693                         }
 694                 }
 695
 696                 $item['body'] .= $add_body;
 697
 698                 Tag::storeFromBody($item['uri-id'], $item['body']);
 699
 700                 // Mastodon Content Warning
 701                 if (($item['verb'] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
 702                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 703                         if (!empty($clear_text)) {
 704                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 705                         }
 706                 }
 707
 708                 if (isset($item['thr-parent'])) {
 709                         if (!Post::exists(['uid' => $importer['uid'], 'uri' => $item['thr-parent']])) {
 710                                 if ($related != '') {
 711                                         self::fetchRelated($related, $item['thr-parent'], $importer);
 712                                 }
 713                         } else {
 714                                 Logger::info('Reply with URI ' . $item['uri'] . ' already existed for user ' . $importer['uid'] . '.');
 715                         }
 716                 } else {
 717                         $item['thr-parent'] = $item['uri'];
 718                         $item['gravity'] = Item::GRAVITY_PARENT;
 719                 }
 720
 721                 self::$itemlist[] = $item;
 722         }
 723
 724         /**
 725          * Fetch related posts and processes them
 726          *
 727          * @param string $related     The link to the related item
 728          * @param string $related_uri The related item in "uri" format
 729          * @param array  $importer    user record of the importing user
 730          * @return void
 731          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 732          * @throws \ImagickException
 733          */
 734         private static function fetchRelated(string $related, string $related_uri, array $importer)
 735         {
 736                 $stored = false;
 737                 $curlResult = DI::httpClient()->get($related, HttpClientAccept::ATOM_XML);
 738
 739                 if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
 740                         return;
 741                 }
 742
 743                 $xml = '';
 744
 745                 if ($curlResult->inHeader('Content-Type') &&
 746                         in_array('application/atom+xml', $curlResult->getHeader('Content-Type'))) {
 747                         Logger::info('Directly fetched XML for URI ' . $related_uri);
 748                         $xml = $curlResult->getBody();
 749                 }
 750
 751                 if ($xml == '') {
 752                         $doc = new DOMDocument();
 753                         if (!@$doc->loadHTML($curlResult->getBody())) {
 754                                 return;
 755                         }
 756                         $xpath = new DOMXPath($doc);
 757
 758                         $atom_file = '';
 759
 760                         $links = $xpath->query('//link');
 761                         if ($links) {
 762                                 foreach ($links as $link) {
 763                                         $attribute = self::readAttributes($link);
 764                                         if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
 765                                                 $atom_file = $attribute['href'];
 766                                         }
 767                                 }
 768                                 if ($atom_file != '') {
 769                                         $curlResult = DI::httpClient()->get($atom_file, HttpClientAccept::ATOM_XML);
 770
 771                                         if ($curlResult->isSuccess()) {
 772                                                 Logger::info('Fetched XML for URI ' . $related_uri);
 773                                                 $xml = $curlResult->getBody();
 774                                         }
 775                                 }
 776                         }
 777                 }
 778
 779                 // Workaround for older GNU Social servers
 780                 if (($xml == '') && strstr($related, '/notice/')) {
 781                         $curlResult = DI::httpClient()->get(str_replace('/notice/', '/api/statuses/show/', $related) . '.atom', HttpClientAccept::ATOM_XML);
 782
 783                         if ($curlResult->isSuccess()) {
 784                                 Logger::info('GNU Social workaround to fetch XML for URI ' . $related_uri);
 785                                 $xml = $curlResult->getBody();
 786                         }
 787                 }
 788
 789                 // Even more worse workaround for GNU Social ;-)
 790                 if ($xml == '') {
 791                         $related_guess = self::convertHref($related_uri);
 792                         $curlResult = DI::httpClient()->get(str_replace('/notice/', '/api/statuses/show/', $related_guess) . '.atom', HttpClientAccept::ATOM_XML);
 793
 794                         if ($curlResult->isSuccess()) {
 795                                 Logger::info('GNU Social workaround 2 to fetch XML for URI ' . $related_uri);
 796                                 $xml = $curlResult->getBody();
 797                         }
 798                 }
 799
 800                 if ($xml != '') {
 801                         $hub = '';
 802                         self::process($xml, $importer, $contact, $hub, $stored, false, Conversation::PULL);
 803                 } else {
 804                         Logger::info('XML could not be fetched for URI: ' . $related_uri . ' - href: ' . $related);
 805                 }
 806                 return;
 807         }
 808
 809         /**
 810          * Processes the XML for a repeated post
 811          *
 812          * @param DOMXPath $xpath    The xpath object
 813          * @param object   $entry    The xml entry that is processed
 814          * @param array    $item     The item array
 815          * @param array    $importer user record of the importing user
 816          *
 817          * @return array with data from links
 818          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 819          * @throws \ImagickException
 820          */
 821         private static function processRepeatedItem(DOMXPath $xpath, $entry, array &$item, array $importer): array
 822         {
 823                 $activityobject = $xpath->query('activity:object', $entry)->item(0);
 824
 825                 if (!is_object($activityobject)) {
 826                         return [];
 827                 }
 828
 829                 $link_data = [];
 830
 831                 $orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobject);
 832
 833                 $links = $xpath->query('atom:link', $activityobject);
 834                 if ($links) {
 835                         $link_data = self::processLinks($links, $item);
 836                 }
 837
 838                 $orig_body = XML::getFirstNodeValue($xpath, 'atom:content/text()', $activityobject);
 839                 $orig_created = XML::getFirstNodeValue($xpath, 'atom:published/text()', $activityobject);
 840                 $orig_edited = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $activityobject);
 841
 842                 $orig_author = self::fetchAuthor($xpath, $activityobject, $importer, $dummy, false);
 843
 844                 $item['author-name'] = $orig_author['author-name'];
 845                 $item['author-link'] = $orig_author['author-link'];
 846                 $item['author-id'] = $orig_author['author-id'];
 847
 848                 $item['body'] = HTML::toBBCode($orig_body);
 849                 $item['created'] = $orig_created;
 850                 $item['edited'] = $orig_edited;
 851
 852                 $item['uri'] = $orig_uri;
 853
 854                 $item['verb'] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $activityobject);
 855
 856                 $item['object-type'] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $activityobject);
 857
 858                 // Mastodon Content Warning
 859                 if (($item['verb'] == Activity::POST) && $xpath->evaluate('boolean(atom:summary)', $activityobject)) {
 860                         $clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $activityobject);
 861                         if (!empty($clear_text)) {
 862                                 $item['content-warning'] = HTML::toBBCode($clear_text);
 863                         }
 864                 }
 865
 866                 $inreplyto = $xpath->query('thr:in-reply-to', $activityobject);
 867                 if (is_object($inreplyto->item(0))) {
 868                         foreach ($inreplyto->item(0)->attributes as $attributes) {
 869                                 if ($attributes->name == 'ref') {
 870                                         $item['thr-parent'] = $attributes->textContent;
 871                                 }
 872                         }
 873                 }
 874
 875                 return $link_data;
 876         }
 877
 878         /**
 879          * Processes links in the XML
 880          *
 881          * @param object $links The xml data that contain links
 882          * @param array  $item  The item array
 883          * @return array with data from the links
 884          */
 885         private static function processLinks($links, array &$item): array
 886         {
 887                 $link_data = ['add_body' => '', 'self' => ''];
 888
 889                 foreach ($links as $link) {
 890                         $attribute = self::readAttributes($link);
 891
 892                         if (!empty($attribute['rel']) && !empty($attribute['href'])) {
 893                                 switch ($attribute['rel']) {
 894                                         case 'alternate':
 895                                                 $item['plink'] = $attribute['href'];
 896                                                 if (($item['object-type'] == Activity\ObjectType::QUESTION)
 897                                                         || ($item['object-type'] == Activity\ObjectType::EVENT)
 898                                                 ) {
 899                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::UNKNOWN,
 900                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'] ?? null,
 901                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
 902                                                 }
 903                                                 break;
 904
 905                                         case 'ostatus:conversation':
 906                                                 $link_data['conversation'] = $attribute['href'];
 907                                                 $item['conversation'] = $link_data['conversation'];
 908                                                 break;
 909
 910                                         case 'enclosure':
 911                                                 $filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'], '/')));
 912                                                 if ($filetype == 'image') {
 913                                                         $link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
 914                                                 } else {
 915                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::DOCUMENT,
 916                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'],
 917                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
 918                                                 }
 919                                                 break;
 920
 921                                         case 'related':
 922                                                 if ($item['object-type'] != Activity\ObjectType::BOOKMARK) {
 923                                                         if (!isset($item['thr-parent'])) {
 924                                                                 $item['thr-parent'] = $attribute['href'];
 925                                                         }
 926                                                         $link_data['related'] = $attribute['href'];
 927                                                 } else {
 928                                                         Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::UNKNOWN,
 929                                                                 'url' => $attribute['href'], 'mimetype' => $attribute['type'] ?? null,
 930                                                                 'size' => $attribute['length'] ?? null, 'description' => $attribute['title'] ?? null]);
 931                                                 }
 932                                                 break;
 933
 934                                         case 'self':
 935                                                 if (empty($item['plink'])) {
 936                                                         $item['plink'] = $attribute['href'];
 937                                                 }
 938                                                 $link_data['self'] = $attribute['href'];
 939                                                 break;
 940
 941                                         default:
 942                                                 Logger::notice('Unsupported rel=' . $attribute['rel'] . ', href=' . $attribute['href'] . ', object-type=' . $item['object-type']);
 943                                 }
 944                         }
 945                 }
 946                 return $link_data;
 947         }
 948
 949         /**
 950          * Create an url out of an uri
 951          *
 952          * @param string $href URI in the format "parameter1:parameter1:..."
 953          * @return string URL in the format http(s)://....
 954          */
 955         private static function convertHref(string $href): string
 956         {
 957                 $elements = explode(':', $href);
 958
 959                 if ((count($elements) <= 2) || ($elements[0] != 'tag')) {
 960                         return $href;
 961                 }
 962
 963                 $server = explode(',', $elements[1]);
 964                 $conversation = explode('=', $elements[2]);
 965
 966                 if ((count($elements) == 4) && ($elements[2] == 'post')) {
 967                         return 'http://' . $server[0] . '/notice/' . $elements[3];
 968                 }
 969
 970                 if ((count($conversation) != 2) || ($conversation[1] == '')) {
 971                         return $href;
 972                 }
 973
 974                 if ($elements[3] == 'objectType=thread') {
 975                         return 'http://' . $server[0] . '/conversation/' . $conversation[1];
 976                 } else {
 977                         return 'http://' . $server[0] . '/notice/' . $conversation[1];
 978                 }
 979         }
 980
 981         /**
 982          * Adds the header elements to the XML document
 983          *
 984          * @param DOMDocument $doc       XML document
 985          * @param array       $owner     Contact data of the poster
 986          * @param string      $filter    The related feed filter (activity, posts or comments)
 987          *
 988          * @return DOMElement Header root element
 989          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 990          */
 991         private static function addHeader(DOMDocument $doc, array $owner, string $filter): DOMElement
 992         {
 993                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
 994                 $doc->appendChild($root);
 995
 996                 $root->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
 997                 $root->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
 998                 $root->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
 999                 $root->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
1000                 $root->setAttribute('xmlns:poco', ActivityNamespace::POCO);
1001                 $root->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
1002                 $root->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
1003                 $root->setAttribute('xmlns:mastodon', ActivityNamespace::MASTODON);
1004
1005                 $title = '';
1006                 $selfUri = '/feed/' . $owner['nick'] . '/';
1007                 switch ($filter) {
1008                         case 'activity':
1009                                 $title = DI::l10n()->t('%s\'s timeline', $owner['name']);
1010                                 $selfUri .= $filter;
1011                                 break;
1012
1013                         case 'posts':
1014                                 $title = DI::l10n()->t('%s\'s posts', $owner['name']);
1015                                 break;
1016
1017                         case 'comments':
1018                                 $title = DI::l10n()->t('%s\'s comments', $owner['name']);
1019                                 $selfUri .= $filter;
1020                                 break;
1021                 }
1022
1023                 $selfUri = '/dfrn_poll/' . $owner['nick'];
1024
1025                 $attributes = [
1026                         'uri' => 'https://friendi.ca',
1027                         'version' => App::VERSION . '-' . DB_UPDATE_VERSION,
1028                 ];
1029                 XML::addElement($doc, $root, 'generator', App::PLATFORM, $attributes);
1030                 XML::addElement($doc, $root, 'id', DI::baseUrl() . '/profile/' . $owner['nick']);
1031                 XML::addElement($doc, $root, 'title', $title);
1032                 XML::addElement($doc, $root, 'subtitle', sprintf("Updates from %s on %s", $owner['name'], DI::config()->get('config', 'sitename')));
1033                 XML::addElement($doc, $root, 'logo', User::getAvatarUrl($owner, Proxy::SIZE_SMALL));
1034                 XML::addElement($doc, $root, 'updated', DateTimeFormat::utcNow(DateTimeFormat::ATOM));
1035
1036                 $author = self::addAuthor($doc, $owner, true);
1037                 $root->appendChild($author);
1038
1039                 $attributes = [
1040                         'href' => $owner['url'],
1041                         'rel' => 'alternate',
1042                         'type' => 'text/html',
1043                 ];
1044                 XML::addElement($doc, $root, 'link', '', $attributes);
1045
1046                 /// @TODO We have to find out what this is
1047                 /// $attributes = array("href" => DI::baseUrl()."/sup",
1048                 ///             "rel" => "http://api.friendfeed.com/2008/03#sup",
1049                 ///             "type" => "application/json");
1050                 /// XML::addElement($doc, $root, "link", "", $attributes);
1051
1052                 self::addHubLink($doc, $root, $owner['nick']);
1053
1054                 $attributes = ['href' => DI::baseUrl() . '/salmon/' . $owner['nick'], 'rel' => 'salmon'];
1055                 XML::addElement($doc, $root, 'link', '', $attributes);
1056
1057                 $attributes = ['href' => DI::baseUrl() . '/salmon/' . $owner['nick'], 'rel' => 'http://salmon-protocol.org/ns/salmon-replies'];
1058                 XML::addElement($doc, $root, 'link', '', $attributes);
1059
1060                 $attributes = ['href' => DI::baseUrl() . '/salmon/' . $owner['nick'], 'rel' => 'http://salmon-protocol.org/ns/salmon-mention'];
1061                 XML::addElement($doc, $root, 'link', '', $attributes);
1062
1063                 $attributes = ['href' => DI::baseUrl() . $selfUri, 'rel' => 'self', 'type' => 'application/atom+xml'];
1064                 XML::addElement($doc, $root, 'link', '', $attributes);
1065
1066                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1067                         $members = DBA::count('contact', [
1068                                 'uid'     => $owner['uid'],
1069                                 'self'    => false,
1070                                 'pending' => false,
1071                                 'archive' => false,
1072                                 'hidden'  => false,
1073                                 'blocked' => false,
1074                         ]);
1075                         XML::addElement($doc, $root, 'statusnet:group_info', '', ['member_count' => $members]);
1076                 }
1077
1078                 return $root;
1079         }
1080
1081         /**
1082          * Add the link to the push hubs to the XML document
1083          *
1084          * @param DOMDocument $doc  XML document
1085          * @param DOMElement  $root XML root element where the hub links are added
1086          * @param string      $nick Nickname
1087          * @return void
1088          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1089          */
1090         public static function addHubLink(DOMDocument $doc, DOMElement $root, string $nick)
1091         {
1092                 $h = DI::baseUrl() . '/pubsubhubbub/' . $nick;
1093                 XML::addElement($doc, $root, 'link', '', ['href' => $h, 'rel' => 'hub']);
1094         }
1095
1096         /**
1097          * Adds attachment data to the XML document
1098          *
1099          * @param DOMDocument $doc  XML document
1100          * @param DOMElement  $root XML root element where the hub links are added
1101          * @param array       $item Data of the item that is to be posted
1102          * @return void
1103          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1104          */
1105         public static function getAttachment(DOMDocument $doc, DOMElement $root, array $item)
1106         {
1107                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO, Post\Media::DOCUMENT, Post\Media::TORRENT]) as $attachment) {
1108                         $attributes = ['rel' => 'enclosure',
1109                                 'href' => $attachment['url'],
1110                                 'type' => $attachment['mimetype']];
1111
1112                         if (!empty($attachment['size'])) {
1113                                 $attributes['length'] = intval($attachment['size']);
1114                         }
1115                         if (!empty($attachment['description'])) {
1116                                 $attributes['title'] = $attachment['description'];
1117                         }
1118
1119                         XML::addElement($doc, $root, 'link', '', $attributes);
1120                 }
1121         }
1122
1123         /**
1124          * Adds the author element to the XML document
1125          *
1126          * @param DOMDocument $doc          XML document
1127          * @param array       $owner        Contact data of the poster
1128          * @param bool        $show_profile Whether to show profile
1129          * @return DOMElement Author element
1130          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1131          */
1132         private static function addAuthor(DOMDocument $doc, array $owner, bool $show_profile = true): DOMElement
1133         {
1134                 $profile = DBA::selectFirst('profile', ['homepage', 'publish'], ['uid' => $owner['uid']]);
1135                 $author = $doc->createElement('author');
1136                 XML::addElement($doc, $author, 'id', $owner['url']);
1137                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1138                         XML::addElement($doc, $author, 'activity:object-type', Activity\ObjectType::GROUP);
1139                 } else {
1140                         XML::addElement($doc, $author, 'activity:object-type', Activity\ObjectType::PERSON);
1141                 }
1142
1143                 XML::addElement($doc, $author, 'uri', $owner['url']);
1144                 XML::addElement($doc, $author, 'name', $owner['nick']);
1145                 XML::addElement($doc, $author, 'email', $owner['addr']);
1146                 if ($show_profile) {
1147                         XML::addElement($doc, $author, 'summary', BBCode::convertForUriId($owner['uri-id'], $owner['about'], BBCode::OSTATUS));
1148                 }
1149
1150                 $attributes = [
1151                         'rel' => 'alternate',
1152                         'type' => 'text/html',
1153                         'href' => $owner['url'],
1154                 ];
1155                 XML::addElement($doc, $author, 'link', '', $attributes);
1156
1157                 $attributes = [
1158                         'rel' => 'avatar',
1159                         'type' => 'image/jpeg', // To-Do?
1160                         'media:width' => Proxy::PIXEL_SMALL,
1161                         'media:height' => Proxy::PIXEL_SMALL,
1162                         'href' => User::getAvatarUrl($owner, Proxy::SIZE_SMALL),
1163                 ];
1164                 XML::addElement($doc, $author, 'link', '', $attributes);
1165
1166                 if (isset($owner['thumb'])) {
1167                         $attributes = [
1168                                 'rel' => 'avatar',
1169                                 'type' => 'image/jpeg', // To-Do?
1170                                 'media:width' => Proxy::PIXEL_THUMB,
1171                                 'media:height' => Proxy::PIXEL_THUMB,
1172                                 'href' => User::getAvatarUrl($owner, Proxy::SIZE_THUMB),
1173                         ];
1174                         XML::addElement($doc, $author, 'link', '', $attributes);
1175                 }
1176
1177                 XML::addElement($doc, $author, 'poco:preferredUsername', $owner['nick']);
1178                 XML::addElement($doc, $author, 'poco:displayName', $owner['name']);
1179                 if ($show_profile) {
1180                         XML::addElement($doc, $author, 'poco:note', BBCode::convertForUriId($owner['uri-id'], $owner['about'], BBCode::OSTATUS));
1181
1182                         if (trim($owner['location']) != '') {
1183                                 $element = $doc->createElement('poco:address');
1184                                 XML::addElement($doc, $element, 'poco:formatted', $owner['location']);
1185                                 $author->appendChild($element);
1186                         }
1187                 }
1188
1189                 if (DBA::isResult($profile) && !$show_profile) {
1190                         if (trim($profile['homepage']) != '') {
1191                                 $urls = $doc->createElement('poco:urls');
1192                                 XML::addElement($doc, $urls, 'poco:type', 'homepage');
1193                                 XML::addElement($doc, $urls, 'poco:value', $profile['homepage']);
1194                                 XML::addElement($doc, $urls, 'poco:primary', 'true');
1195                                 $author->appendChild($urls);
1196                         }
1197
1198                         XML::addElement($doc, $author, 'followers', '', ['url' => DI::baseUrl() . '/profile/' . $owner['nick'] . '/contacts/followers']);
1199                         XML::addElement($doc, $author, 'statusnet:profile_info', '', ['local_id' => $owner['uid']]);
1200
1201                         if ($profile['publish']) {
1202                                 XML::addElement($doc, $author, 'mastodon:scope', 'public');
1203                         }
1204                 }
1205
1206                 return $author;
1207         }
1208
1209         /**
1210          * @TODO Picture attachments should look like this:
1211          *      <a href="https://status.pirati.ca/attachment/572819" title="https://status.pirati.ca/file/heluecht-20151202T222602-rd3u49p.gif"
1212          *      class="attachment thumbnail" id="attachment-572819" rel="nofollow external">https://status.pirati.ca/attachment/572819</a>
1213          */
1214
1215         /**
1216          * Returns the given activity if present - otherwise returns the "post" activity
1217          *
1218          * @param array $item Data of the item that is to be posted
1219          * @return string activity
1220          */
1221         public static function constructVerb(array $item): string
1222         {
1223                 if (!empty($item['verb'])) {
1224                         return $item['verb'];
1225                 }
1226
1227                 return Activity::POST;
1228         }
1229
1230         /**
1231          * Returns the given object type if present - otherwise returns the "note" object type
1232          *
1233          * @param array $item Data of the item that is to be posted
1234          * @return string Object type
1235          */
1236         private static function constructObjecttype(array $item): string
1237         {
1238                 if (!empty($item['object-type']) && in_array($item['object-type'], [Activity\ObjectType::NOTE, Activity\ObjectType::COMMENT])) {
1239                         return $item['object-type'];
1240                 }
1241
1242                 return Activity\ObjectType::NOTE;
1243         }
1244
1245         /**
1246          * Adds an entry element to the XML document
1247          *
1248          * @param DOMDocument $doc       XML document
1249          * @param array       $item      Data of the item that is to be posted
1250          * @param array       $owner     Contact data of the poster
1251          * @param bool        $toplevel  optional default false
1252          *
1253          * @return DOMElement Entry element
1254          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1255          * @throws \ImagickException
1256          */
1257         private static function entry(DOMDocument $doc, array $item, array $owner, bool $toplevel = false): DOMElement
1258         {
1259                 if ($item['verb'] == Activity::LIKE) {
1260                         return self::likeEntry($doc, $item, $owner, $toplevel);
1261                 } elseif (in_array($item['verb'], [Activity::FOLLOW, Activity::O_UNFOLLOW])) {
1262                         return self::followEntry($doc, $item, $owner, $toplevel);
1263                 } else {
1264                         return self::noteEntry($doc, $item, $owner, $toplevel);
1265                 }
1266         }
1267
1268         /**
1269          * Adds an entry element with a "like"
1270          *
1271          * @param DOMDocument $doc      XML document
1272          * @param array       $item     Data of the item that is to be posted
1273          * @param array       $owner    Contact data of the poster
1274          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1275          * @return DOMElement Entry element with "like"
1276          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1277          * @throws \ImagickException
1278          */
1279         private static function likeEntry(DOMDocument $doc, array $item, array $owner, bool $toplevel): DOMElement
1280         {
1281                 if (($item['gravity'] != Item::GRAVITY_PARENT) && (Strings::normaliseLink($item['author-link']) != Strings::normaliseLink($owner['url']))) {
1282                         Logger::info('OStatus entry is from author ' . $owner['url'] . ' - not from ' . $item['author-link'] . '. Quitting.');
1283                 }
1284
1285                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1286
1287                 $verb = ActivityNamespace::ACTIVITY_SCHEMA . 'favorite';
1288                 self::entryContent($doc, $entry, $item, $owner, 'Favorite', $verb, false);
1289
1290                 $parent = Post::selectFirst([], ['uri' => $item['thr-parent'], 'uid' => $item['uid']]);
1291                 if (DBA::isResult($parent)) {
1292                         $as_object = $doc->createElement('activity:object');
1293
1294                         XML::addElement($doc, $as_object, 'activity:object-type', self::constructObjecttype($parent));
1295
1296                         self::entryContent($doc, $as_object, $parent, $owner, 'New entry');
1297
1298                         $entry->appendChild($as_object);
1299                 }
1300
1301                 self::entryFooter($doc, $entry, $item, $owner);
1302
1303                 return $entry;
1304         }
1305
1306         /**
1307          * Adds the person object element to the XML document
1308          *
1309          * @param DOMDocument $doc     XML document
1310          * @param array       $owner   Contact data of the poster
1311          * @param array       $contact Contact data of the target
1312          * @return DOMElement author element
1313          */
1314         private static function addPersonObject(DOMDocument $doc, array $owner, array $contact): DOMElement
1315         {
1316                 $object = $doc->createElement('activity:object');
1317                 XML::addElement($doc, $object, 'activity:object-type', Activity\ObjectType::PERSON);
1318
1319                 if ($contact['network'] == Protocol::PHANTOM) {
1320                         XML::addElement($doc, $object, 'id', $contact['url']);
1321                         return $object;
1322                 }
1323
1324                 XML::addElement($doc, $object, 'id', $contact['alias']);
1325                 XML::addElement($doc, $object, 'title', $contact['nick']);
1326
1327                 XML::addElement($doc, $object, 'link', '', [
1328                         'rel' => 'alternate',
1329                         'type' => 'text/html',
1330                         'href' => $contact['url'],
1331                 ]);
1332
1333                 $attributes = [
1334                         'rel' => 'avatar',
1335                         'type' => 'image/jpeg', // To-Do?
1336                         'media:width' => 300,
1337                         'media:height' => 300,
1338                         'href' => $contact['photo'],
1339                 ];
1340                 XML::addElement($doc, $object, 'link', '', $attributes);
1341
1342                 XML::addElement($doc, $object, 'poco:preferredUsername', $contact['nick']);
1343                 XML::addElement($doc, $object, 'poco:displayName', $contact['name']);
1344
1345                 if (trim($contact['location']) != '') {
1346                         $element = $doc->createElement('poco:address');
1347                         XML::addElement($doc, $element, 'poco:formatted', $contact['location']);
1348                         $object->appendChild($element);
1349                 }
1350
1351                 return $object;
1352         }
1353
1354         /**
1355          * Adds a follow/unfollow entry element
1356          *
1357          * @param DOMDocument $doc      XML document
1358          * @param array       $item     Data of the follow/unfollow message
1359          * @param array       $owner    Contact data of the poster
1360          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1361          * @return DOMElement Entry element
1362          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1363          * @throws \ImagickException
1364          */
1365         private static function followEntry(DOMDocument $doc, array $item, array $owner, bool $toplevel): DOMElement
1366         {
1367                 $item['id'] = $item['parent'] = 0;
1368                 $item['created'] = $item['edited'] = date('c');
1369                 $item['private'] = Item::PRIVATE;
1370
1371                 $contact = Contact::getByURL($item['follow']);
1372                 $item['follow'] = $contact['url'];
1373
1374                 if ($contact['alias']) {
1375                         $item['follow'] = $contact['alias'];
1376                 } else {
1377                         $contact['alias'] = $contact['url'];
1378                 }
1379
1380                 $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($contact['url'])];
1381                 $user_contact = DBA::selectFirst('contact', ['id'], $condition);
1382
1383                 if (DBA::isResult($user_contact)) {
1384                         $connect_id = $user_contact['id'];
1385                 } else {
1386                         $connect_id = 0;
1387                 }
1388
1389                 if ($item['verb'] == Activity::FOLLOW) {
1390                         $message = DI::l10n()->t('%s is now following %s.');
1391                         $title = DI::l10n()->t('following');
1392                         $action = 'subscription';
1393                 } else {
1394                         $message = DI::l10n()->t('%s stopped following %s.');
1395                         $title = DI::l10n()->t('stopped following');
1396                         $action = 'unfollow';
1397                 }
1398
1399                 $item['uri'] = $item['parent-uri'] = $item['thr-parent']
1400                                 = 'tag:' . DI::baseUrl()->getHost() .
1401                                   ','.date('Y-m-d').':'.$action.':'.$owner['uid'].
1402                                 ':person:'.$connect_id.':'.$item['created'];
1403
1404                 $item['body'] = sprintf($message, $owner['nick'], $contact['nick']);
1405
1406                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1407
1408                 self::entryContent($doc, $entry, $item, $owner, $title);
1409
1410                 $object = self::addPersonObject($doc, $owner, $contact);
1411                 $entry->appendChild($object);
1412
1413                 self::entryFooter($doc, $entry, $item, $owner);
1414
1415                 return $entry;
1416         }
1417
1418         /**
1419          * Adds a regular entry element
1420          *
1421          * @param DOMDocument $doc       XML document
1422          * @param array       $item      Data of the item that is to be posted
1423          * @param array       $owner     Contact data of the poster
1424          * @param bool        $toplevel  Is it for en entry element (false) or a feed entry (true)?
1425          * @return DOMElement Entry element
1426          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1427          * @throws \ImagickException
1428          */
1429         private static function noteEntry(DOMDocument $doc, array $item, array $owner, bool $toplevel): DOMElement
1430         {
1431                 if (($item['gravity'] != Item::GRAVITY_PARENT) && (Strings::normaliseLink($item['author-link']) != Strings::normaliseLink($owner['url']))) {
1432                         Logger::info('OStatus entry is from author ' . $owner['url'] . ' - not from ' . $item['author-link'] . '. Quitting.');
1433                 }
1434
1435                 if (!$toplevel) {
1436                         if (!empty($item['title'])) {
1437                                 $title = BBCode::convertForUriId($item['uri-id'], $item['title'], BBCode::OSTATUS);
1438                         } else {
1439                                 $title = sprintf('New note by %s', $owner['nick']);
1440                         }
1441                 } else {
1442                         $title = sprintf('New comment by %s', $owner['nick']);
1443                 }
1444
1445                 $entry = self::entryHeader($doc, $owner, $item, $toplevel);
1446
1447                 XML::addElement($doc, $entry, 'activity:object-type', Activity\ObjectType::NOTE);
1448
1449                 self::entryContent($doc, $entry, $item, $owner, $title, '', true);
1450
1451                 self::entryFooter($doc, $entry, $item, $owner, true);
1452
1453                 return $entry;
1454         }
1455
1456         /**
1457          * Adds a header element to the XML document
1458          *
1459          * @param DOMDocument $doc      XML document
1460          * @param array       $owner    Contact data of the poster
1461          * @param array       $item
1462          * @param bool        $toplevel Is it for en entry element (false) or a feed entry (true)?
1463          * @return DOMElement The entry element where the elements are added
1464          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1465          * @throws \ImagickException
1466          */
1467         public static function entryHeader(DOMDocument $doc, array $owner, array $item, bool $toplevel): DOMElement
1468         {
1469                 if (!$toplevel) {
1470                         $entry = $doc->createElement('entry');
1471
1472                         if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1473                                 $contact = Contact::getByURL($item['author-link']) ?: $owner;
1474                                 $contact['nickname'] = $contact['nickname'] ?? $contact['nick'];
1475                                 $author = self::addAuthor($doc, $contact, false);
1476                                 $entry->appendChild($author);
1477                         }
1478                 } else {
1479                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, 'entry');
1480
1481                         $entry->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
1482                         $entry->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
1483                         $entry->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
1484                         $entry->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
1485                         $entry->setAttribute('xmlns:poco', ActivityNamespace::POCO);
1486                         $entry->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
1487                         $entry->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
1488                         $entry->setAttribute('xmlns:mastodon', ActivityNamespace::MASTODON);
1489
1490                         $author = self::addAuthor($doc, $owner);
1491                         $entry->appendChild($author);
1492                 }
1493
1494                 return $entry;
1495         }
1496
1497         /**
1498          * Adds elements to the XML document
1499          *
1500          * @param DOMDocument $doc       XML document
1501          * @param DOMElement  $entry     Entry element where the content is added
1502          * @param array       $item      Data of the item that is to be posted
1503          * @param array       $owner     Contact data of the poster
1504          * @param string      $title     Title for the post
1505          * @param string      $verb      The activity verb
1506          * @param bool        $complete  Add the "status_net" element?
1507          * @return void
1508          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1509          */
1510         private static function entryContent(DOMDocument $doc, DOMElement $entry, array $item, array $owner, string $title, string $verb = '', bool $complete = true)
1511         {
1512                 if ($verb == '') {
1513                         $verb = self::constructVerb($item);
1514                 }
1515
1516                 XML::addElement($doc, $entry, 'id', $item['uri']);
1517                 XML::addElement($doc, $entry, 'title', html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
1518
1519                 $body = Post\Media::addAttachmentsToBody($item['uri-id'], DI::contentItem()->addSharedPost($item));
1520                 $body = Post\Media::addHTMLLinkToBody($item['uri-id'], $body);
1521
1522                 if (!empty($item['title'])) {
1523                         $body = '[b]' . $item['title'] . "[/b]\n\n" . $body;
1524                 }
1525
1526                 $body = BBCode::convertForUriId($item['uri-id'], $body, BBCode::OSTATUS);
1527
1528                 XML::addElement($doc, $entry, 'content', $body, ['type' => 'html']);
1529
1530                 XML::addElement($doc, $entry, 'link', '', [
1531                         'rel' => 'alternate',
1532                         'type' => 'text/html',
1533                         'href' => DI::baseUrl() . '/display/' . $item['guid'],
1534                 ]);
1535
1536                 if ($complete && ($item['id'] > 0)) {
1537                         XML::addElement($doc, $entry, 'status_net', '', ['notice_id' => $item['id']]);
1538                 }
1539
1540                 XML::addElement($doc, $entry, 'activity:verb', $verb);
1541
1542                 XML::addElement($doc, $entry, 'published', DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM));
1543                 XML::addElement($doc, $entry, 'updated', DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM));
1544         }
1545
1546         /**
1547          * Adds the elements at the foot of an entry to the XML document
1548          *
1549          * @param DOMDocument $doc       XML document
1550          * @param object      $entry     The entry element where the elements are added
1551          * @param array       $item      Data of the item that is to be posted
1552          * @param array       $owner     Contact data of the poster
1553          * @param bool        $complete  default true
1554          * @return void
1555          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1556          */
1557         private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner, bool $complete = true)
1558         {
1559                 $mentioned = [];
1560
1561                 if ($item['gravity'] != Item::GRAVITY_PARENT) {
1562                         $parent = Post::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
1563
1564                         $thrparent = Post::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner['uid'], 'uri' => $item['thr-parent']]);
1565
1566                         if (DBA::isResult($thrparent)) {
1567                                 $mentioned[$thrparent['author-link']] = $thrparent['author-link'];
1568                                 $mentioned[$thrparent['owner-link']]  = $thrparent['owner-link'];
1569                                 $parent_plink                         = $thrparent['plink'];
1570                         } elseif (DBA::isResult($parent)) {
1571                                 $mentioned[$parent['author-link']] = $parent['author-link'];
1572                                 $mentioned[$parent['owner-link']]  = $parent['owner-link'];
1573                                 $parent_plink                      = DI::baseUrl() . '/display/' . $parent['guid'];
1574                         } else {
1575                                 DI::logger()->notice('Missing parent and thr-parent for child item', ['item' => $item]);
1576                         }
1577
1578                         if (isset($parent_plink)) {
1579                                 $attributes = [
1580                                         'ref'  => $item['thr-parent'],
1581                                         'href' => $parent_plink];
1582                                 XML::addElement($doc, $entry, 'thr:in-reply-to', '', $attributes);
1583
1584                                 $attributes = [
1585                                         'rel'  => 'related',
1586                                         'href' => $parent_plink];
1587                                 XML::addElement($doc, $entry, 'link', '', $attributes);
1588                         }
1589                 }
1590
1591                 if (intval($item['parent']) > 0) {
1592                         $conversation_href = $conversation_uri = $item['conversation'];
1593
1594                         XML::addElement($doc, $entry, 'link', '', ['rel' => 'ostatus:conversation', 'href' => $conversation_href]);
1595
1596                         $attributes = [
1597                                 'href' => $conversation_href,
1598                                 'local_id' => $item['parent'],
1599                                 'ref' => $conversation_uri,
1600                         ];
1601
1602                         XML::addElement($doc, $entry, 'ostatus:conversation', $conversation_uri, $attributes);
1603                 }
1604
1605                 // uri-id isn't present for follow entry pseudo-items
1606                 $tags = Tag::getByURIId($item['uri-id'] ?? 0);
1607                 foreach ($tags as $tag) {
1608                         $mentioned[$tag['url']] = $tag['url'];
1609                 }
1610
1611                 // Make sure that mentions are accepted (GNU Social has problems with mixing HTTP and HTTPS)
1612                 $newmentions = [];
1613                 foreach ($mentioned as $mention) {
1614                         $newmentions[str_replace('http://', 'https://', $mention)] = str_replace('http://', 'https://', $mention);
1615                         $newmentions[str_replace('https://', 'http://', $mention)] = str_replace('https://', 'http://', $mention);
1616                 }
1617                 $mentioned = $newmentions;
1618
1619                 foreach ($mentioned as $mention) {
1620                         $contact = Contact::getByURL($mention, false, ['contact-type']);
1621                         if (!empty($contact) && ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
1622                                 XML::addElement($doc, $entry, 'link', '', [
1623                                         'rel' => 'mentioned',
1624                                         'ostatus:object-type' => Activity\ObjectType::GROUP,
1625                                         'href' => $mention,
1626                                 ]);
1627                         } else {
1628                                 XML::addElement($doc, $entry, 'link', '', [
1629                                         'rel' => 'mentioned',
1630                                         'ostatus:object-type' => Activity\ObjectType::PERSON,
1631                                                 'href' => $mention,
1632                                 ]);
1633                         }
1634                 }
1635
1636                 if ($owner['contact-type'] == Contact::TYPE_COMMUNITY) {
1637                         XML::addElement($doc, $entry, 'link', '', [
1638                                 'rel' => 'mentioned',
1639                                 'ostatus:object-type' => 'http://activitystrea.ms/schema/1.0/group',
1640                                 'href' => $owner['url']
1641                         ]);
1642                 }
1643
1644                 if ($item['private'] != Item::PRIVATE) {
1645                         XML::addElement($doc, $entry, 'link', '', ['rel' => 'ostatus:attention',
1646                                                                         'href' => 'http://activityschema.org/collection/public']);
1647                         XML::addElement($doc, $entry, 'link', '', ['rel' => 'mentioned',
1648                                                                         'ostatus:object-type' => 'http://activitystrea.ms/schema/1.0/collection',
1649                                                                         'href' => 'http://activityschema.org/collection/public']);
1650                         XML::addElement($doc, $entry, 'mastodon:scope', 'public');
1651                 }
1652
1653                 foreach ($tags as $tag) {
1654                         if ($tag['type'] == Tag::HASHTAG) {
1655                                 XML::addElement($doc, $entry, 'category', '', ['term' => $tag['name']]);
1656                         }
1657                 }
1658
1659                 self::getAttachment($doc, $entry, $item);
1660
1661                 if ($complete && ($item['id'] > 0)) {
1662                         $app = $item['app'];
1663                         if ($app == '') {
1664                                 $app = 'web';
1665                         }
1666
1667                         $attributes = ['local_id' => $item['id'], 'source' => $app];
1668
1669                         if (isset($parent['id'])) {
1670                                 $attributes['repeat_of'] = $parent['id'];
1671                         }
1672
1673                         if ($item['coord'] != '') {
1674                                 XML::addElement($doc, $entry, 'georss:point', $item['coord']);
1675                         }
1676
1677                         XML::addElement($doc, $entry, 'statusnet:notice_info', '', $attributes);
1678                 }
1679         }
1680
1681         /**
1682          * Creates the XML feed for a given nickname
1683          *
1684          * Supported filters:
1685          * - activity (default): all the public posts
1686          * - posts: all the public top-level posts
1687          * - comments: all the public replies
1688          *
1689          * Updates the provided last_update parameter if the result comes from the
1690          * cache or it is empty
1691          *
1692          * @param string  $owner_nick  Nickname of the feed owner
1693          * @param string  $last_update Date of the last update (in "Y-m-d H:i:s" format)
1694          * @param integer $max_items   Number of maximum items to fetch
1695          * @param string  $filter      Feed items filter (activity, posts or comments)
1696          * @param boolean $nocache     Wether to bypass caching
1697          * @return string XML feed or empty string on error
1698          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1699          * @throws \ImagickException
1700          */
1701         public static function feed(string $owner_nick, string &$last_update, int $max_items = 300, string $filter = 'activity', bool $nocache = false): string
1702         {
1703                 $stamp = microtime(true);
1704
1705                 $owner = User::getOwnerDataByNick($owner_nick);
1706                 if (!$owner) {
1707                         return '';
1708                 }
1709
1710                 $cachekey = 'ostatus:feed:' . $owner_nick . ':' . $filter . ':' . $last_update;
1711
1712                 $previous_created = $last_update;
1713
1714                 // Don't cache when the last item was posted less than 15 minutes ago (Cache duration)
1715                 if ((time() - strtotime($owner['last-item'])) < 15*60) {
1716                         $result = DI::cache()->get($cachekey);
1717                         if (!$nocache && !is_null($result)) {
1718                                 Logger::info('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created . ' (cached)');
1719                                 $last_update = $result['last_update'];
1720                                 return $result['feed'];
1721                         }
1722                 }
1723
1724                 if (!strlen($last_update)) {
1725                         $last_update = 'now -30 days';
1726                 }
1727
1728                 $check_date = DateTimeFormat::utc($last_update);
1729                 $authorid = Contact::getIdForURL($owner['url']);
1730
1731                 $condition = [
1732                         "`uid` = ? AND `received` > ? AND NOT `deleted` AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?)",
1733                         $owner['uid'],
1734                         $check_date,
1735                         Item::PRIVATE,
1736                         Protocol::OSTATUS,
1737                         Protocol::DFRN,
1738                 ];
1739
1740                 if ($filter === 'comments') {
1741                         $condition[0] .= " AND `object-type` = ? ";
1742                         $condition[] = Activity\ObjectType::COMMENT;
1743                 }
1744
1745                 if ($owner['contact-type'] != Contact::TYPE_COMMUNITY) {
1746                         $condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
1747                         $condition[] = $owner['id'];
1748                         $condition[] = $authorid;
1749                 }
1750
1751                 $params = ['order' => ['received' => true], 'limit' => $max_items];
1752
1753                 if ($filter === 'posts') {
1754                         $ret = Post::selectThread([], $condition, $params);
1755                 } else {
1756                         $ret = Post::select([], $condition, $params);
1757                 }
1758
1759                 $items = Post::toArray($ret);
1760
1761                 $doc = new DOMDocument('1.0', 'utf-8');
1762                 $doc->formatOutput = true;
1763
1764                 $root = self::addHeader($doc, $owner, $filter);
1765
1766                 foreach ($items as $item) {
1767                         if (DI::config()->get('system', 'ostatus_debug')) {
1768                                 $item['body'] .= '🍼';
1769                         }
1770
1771                         if (in_array($item['verb'], [Activity::FOLLOW, Activity::O_UNFOLLOW, Activity::LIKE])) {
1772                                 continue;
1773                         }
1774
1775                         $entry = self::entry($doc, $item, $owner, false);
1776                         $root->appendChild($entry);
1777
1778                         if ($last_update < $item['created']) {
1779                                 $last_update = $item['created'];
1780                         }
1781                 }
1782
1783                 $feeddata = trim($doc->saveXML());
1784
1785                 $msg = ['feed' => $feeddata, 'last_update' => $last_update];
1786                 DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
1787
1788                 Logger::info('Feed duration: ' . number_format(microtime(true) - $stamp, 3) . ' - ' . $owner_nick . ' - ' . $filter . ' - ' . $previous_created);
1789
1790                 return $feeddata;
1791         }
1792
1793         /**
1794          * Creates the XML for a salmon message
1795          *
1796          * @param array $item  Data of the item that is to be posted
1797          * @param array $owner Contact data of the poster
1798          *
1799          * @return string XML for the salmon
1800          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1801          * @throws \ImagickException
1802          */
1803         public static function salmon(array $item, array $owner): string
1804         {
1805                 $doc = new DOMDocument('1.0', 'utf-8');
1806                 $doc->formatOutput = true;
1807
1808                 if (DI::config()->get('system', 'ostatus_debug')) {
1809                         $item['body'] .= '🐟';
1810                 }
1811
1812                 $entry = self::entry($doc, $item, $owner, true);
1813
1814                 $doc->appendChild($entry);
1815
1816                 return trim($doc->saveXML());
1817         }
1818
1819         /**
1820          * Checks if the given contact url does support OStatus
1821          *
1822          * @param string  $url    profile url
1823          * @return boolean
1824          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1825          * @throws \ImagickException
1826          */
1827         public static function isSupportedByContactUrl(string $url): bool
1828         {
1829                 $probe = Probe::uri($url, Protocol::OSTATUS);
1830                 return $probe['network'] == Protocol::OSTATUS;
1831         }
1832 }