src/Protocol/DFRN.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Protocol;
  23
  24 use DOMDocument;
  25 use DOMElement;
  26 use DOMNode;
  27 use DOMXPath;
  28 use Friendica\Content\Text\BBCode;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Database\DBA;
  32 use Friendica\DI;
  33 use Friendica\Model\Contact;
  34 use Friendica\Model\Conversation;
  35 use Friendica\Model\Event;
  36 use Friendica\Model\FContact;
  37 use Friendica\Model\GServer;
  38 use Friendica\Model\Item;
  39 use Friendica\Model\ItemURI;
  40 use Friendica\Model\Mail;
  41 use Friendica\Model\Notification;
  42 use Friendica\Model\Photo;
  43 use Friendica\Model\Post;
  44 use Friendica\Model\Profile;
  45 use Friendica\Model\Tag;
  46 use Friendica\Model\User;
  47 use Friendica\Network\Probe;
  48 use Friendica\Util\Crypto;
  49 use Friendica\Util\DateTimeFormat;
  50 use Friendica\Util\Images;
  51 use Friendica\Util\Proxy;
  52 use Friendica\Util\Strings;
  53 use Friendica\Util\XML;
  54 use GuzzleHttp\Psr7\Uri;
  55
  56 /**
  57  * This class contain functions to create and send DFRN XML files
  58  */
  59 class DFRN
  60 {
  61
  62         const TOP_LEVEL = 0; // Top level posting
  63         const REPLY     = 1; // Regular reply that is stored locally
  64         const REPLY_RC  = 2; // Reply that will be relayed
  65
  66         /**
  67          * Generates an array of contact and user for DFRN imports
  68          *
  69          * This array contains not only the receiver but also the sender of the message.
  70          *
  71          * @param integer $cid Contact id
  72          * @param integer $uid User id
  73          *
  74          * @return array importer
  75          * @throws \Exception
  76          */
  77         public static function getImporter(int $cid, int $uid = 0): array
  78         {
  79                 $condition = ['id' => $cid, 'blocked' => false, 'pending' => false];
  80                 $contact = DBA::selectFirst('contact', [], $condition);
  81                 if (!DBA::isResult($contact)) {
  82                         return [];
  83                 }
  84
  85                 $contact['cpubkey'] = $contact['pubkey'];
  86                 $contact['cprvkey'] = $contact['prvkey'];
  87                 $contact['senderName'] = $contact['name'];
  88
  89                 if ($uid != 0) {
  90                         $condition = ['uid' => $uid, 'account_expired' => false, 'account_removed' => false];
  91                         $user = DBA::selectFirst('user', [], $condition);
  92                         if (!DBA::isResult($user)) {
  93                                 return [];
  94                         }
  95
  96                         $user['importer_uid'] = $user['uid'];
  97                         $user['uprvkey'] = $user['prvkey'];
  98                 } else {
  99                         $user = ['importer_uid' => 0, 'uprvkey' => '', 'timezone' => 'UTC',
 100                                 'nickname' => '', 'sprvkey' => '', 'spubkey' => '',
 101                                 'page-flags' => 0, 'account-type' => 0, 'prvnets' => 0];
 102                 }
 103
 104                 return array_merge($contact, $user);
 105         }
 106
 107         /**
 108          * Generates the atom entries for delivery.php
 109          *
 110          * This function is used whenever content is transmitted via DFRN.
 111          *
 112          * @param array $items Item elements
 113          * @param array $owner Owner record
 114          *
 115          * @return string DFRN entries
 116          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 117          * @throws \ImagickException
 118          * @todo  Find proper type-hints
 119          */
 120         public static function entries(array $items, array $owner): string
 121         {
 122                 $doc = new DOMDocument('1.0', 'utf-8');
 123                 $doc->formatOutput = true;
 124
 125                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 126
 127                 if (! count($items)) {
 128                         return trim($doc->saveXML());
 129                 }
 130
 131                 foreach ($items as $item) {
 132                         // These values aren't sent when sending from the queue.
 133                         /// @todo Check if we can set these values from the queue or if they are needed at all.
 134                         $item['entry:comment-allow'] = ($item['entry:comment-allow'] ?? '') ?: true;
 135                         $item['entry:cid'] = $item['entry:cid'] ?? 0;
 136
 137                         $entry = self::entry($doc, 'text', $item, $owner, $item['entry:comment-allow'], $item['entry:cid']);
 138                         if (isset($entry)) {
 139                                 $root->appendChild($entry);
 140                         }
 141                 }
 142
 143                 return trim($doc->saveXML());
 144         }
 145
 146         /**
 147          * Generate an atom entry for a given uri id and user
 148          *
 149          * @param int     $uri_id       The uri id
 150          * @param int     $uid          The user id
 151          * @param boolean $conversation Show the conversation. If false show the single post.
 152          *
 153          * @return string DFRN feed entry
 154          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 155          * @throws \ImagickException
 156          */
 157         public static function itemFeed(int $uri_id, int $uid, bool $conversation = false): string
 158         {
 159                 if ($conversation) {
 160                         $condition = ['parent-uri-id' => $uri_id];
 161                 } else {
 162                         $condition = ['uri-id' => $uri_id];
 163                 }
 164
 165                 $condition['uid'] = $uid;
 166
 167                 $items = Post::selectToArray(Item::DELIVER_FIELDLIST, $condition);
 168                 if (!DBA::isResult($items)) {
 169                         return '';
 170                 }
 171
 172                 $item = $items[0];
 173
 174                 if ($item['uid'] != 0) {
 175                         $owner = User::getOwnerDataById($item['uid']);
 176                         if (!$owner) {
 177                                 return '';
 178                         }
 179                 } else {
 180                         $owner = ['uid' => 0, 'nick' => 'feed-item'];
 181                 }
 182
 183                 $doc = new DOMDocument('1.0', 'utf-8');
 184                 $doc->formatOutput = true;
 185                 $type = 'html';
 186
 187                 if ($conversation) {
 188                         $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
 189                         $doc->appendChild($root);
 190
 191                         $root->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
 192                         $root->setAttribute('xmlns:at', ActivityNamespace::TOMB);
 193                         $root->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
 194                         $root->setAttribute('xmlns:dfrn', ActivityNamespace::DFRN);
 195                         $root->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
 196                         $root->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
 197                         $root->setAttribute('xmlns:poco', ActivityNamespace::POCO);
 198                         $root->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
 199                         $root->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
 200
 201                         foreach ($items as $item) {
 202                                 $entry = self::entry($doc, $type, $item, $owner, true, 0);
 203                                 if (isset($entry)) {
 204                                         $root->appendChild($entry);
 205                                 }
 206                         }
 207                 } else {
 208                         self::entry($doc, $type, $item, $owner, true, 0, true);
 209                 }
 210
 211                 $atom = trim($doc->saveXML());
 212                 return $atom;
 213         }
 214
 215         /**
 216          * Create XML text for DFRN mails
 217          *
 218          * @param array $mail  Mail record
 219          * @param array $owner Owner record
 220          *
 221          * @return string DFRN mail
 222          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 223          * @todo  Find proper type-hints
 224          */
 225         public static function mail(array $mail, array $owner): string
 226         {
 227                 $doc = new DOMDocument('1.0', 'utf-8');
 228                 $doc->formatOutput = true;
 229
 230                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 231
 232                 $mailElement = $doc->createElement('dfrn:mail');
 233                 $senderElement = $doc->createElement('dfrn:sender');
 234
 235                 XML::addElement($doc, $senderElement, 'dfrn:name', $owner['name']);
 236                 XML::addElement($doc, $senderElement, 'dfrn:uri', $owner['url']);
 237                 XML::addElement($doc, $senderElement, 'dfrn:avatar', $owner['thumb']);
 238
 239                 $mailElement->appendChild($senderElement);
 240
 241                 XML::addElement($doc, $mailElement, 'dfrn:id', $mail['uri']);
 242                 XML::addElement($doc, $mailElement, 'dfrn:in-reply-to', $mail['parent-uri']);
 243                 XML::addElement($doc, $mailElement, 'dfrn:sentdate', DateTimeFormat::utc($mail['created'] . '+00:00', DateTimeFormat::ATOM));
 244                 XML::addElement($doc, $mailElement, 'dfrn:subject', $mail['title']);
 245                 XML::addElement($doc, $mailElement, 'dfrn:content', $mail['body']);
 246
 247                 $root->appendChild($mailElement);
 248
 249                 return trim($doc->saveXML());
 250         }
 251
 252         /**
 253          * Create XML text for DFRN friend suggestions
 254          *
 255          * @param array $item  suggestion elements
 256          * @param array $owner Owner record
 257          *
 258          * @return string DFRN suggestions
 259          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 260          * @todo  Find proper type-hints
 261          */
 262         public static function fsuggest(array $item, array $owner): string
 263         {
 264                 $doc = new DOMDocument('1.0', 'utf-8');
 265                 $doc->formatOutput = true;
 266
 267                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 268
 269                 $suggest = $doc->createElement('dfrn:suggest');
 270
 271                 XML::addElement($doc, $suggest, 'dfrn:url', $item['url']);
 272                 XML::addElement($doc, $suggest, 'dfrn:name', $item['name']);
 273                 XML::addElement($doc, $suggest, 'dfrn:photo', $item['photo']);
 274                 XML::addElement($doc, $suggest, 'dfrn:request', $item['request']);
 275                 XML::addElement($doc, $suggest, 'dfrn:note', $item['note']);
 276
 277                 $root->appendChild($suggest);
 278
 279                 return trim($doc->saveXML());
 280         }
 281
 282         /**
 283          * Create XML text for DFRN relocations
 284          *
 285          * @param array $owner Owner record
 286          * @param int   $uid   User ID
 287          *
 288          * @return string DFRN relocations
 289          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 290          * @todo  Find proper type-hints
 291          */
 292         public static function relocate(array $owner, int $uid): string
 293         {
 294
 295                 /* get site pubkey. this could be a new installation with no site keys*/
 296                 $pubkey = DI::config()->get('system', 'site_pubkey');
 297                 if (! $pubkey) {
 298                         $res = Crypto::newKeypair(1024);
 299                         DI::config()->set('system', 'site_prvkey', $res['prvkey']);
 300                         DI::config()->set('system', 'site_pubkey', $res['pubkey']);
 301                 }
 302
 303                 $profilephotos = Photo::selectToArray(['resource-id' , 'scale'], ['profile' => true, 'uid' => $uid], ['order' => ['scale']]);
 304
 305                 $photos = [];
 306                 $ext = Images::supportedTypes();
 307
 308                 foreach ($profilephotos as $p) {
 309                         $photos[$p['scale']] = DI::baseUrl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 310                 }
 311
 312
 313                 $doc = new DOMDocument('1.0', 'utf-8');
 314                 $doc->formatOutput = true;
 315
 316                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 317
 318                 $relocate = $doc->createElement('dfrn:relocate');
 319
 320                 XML::addElement($doc, $relocate, 'dfrn:url', $owner['url']);
 321                 XML::addElement($doc, $relocate, 'dfrn:name', $owner['name']);
 322                 XML::addElement($doc, $relocate, 'dfrn:addr', $owner['addr']);
 323                 XML::addElement($doc, $relocate, 'dfrn:avatar', $owner['avatar']);
 324                 XML::addElement($doc, $relocate, 'dfrn:photo', $photos[4]);
 325                 XML::addElement($doc, $relocate, 'dfrn:thumb', $photos[5]);
 326                 XML::addElement($doc, $relocate, 'dfrn:micro', $photos[6]);
 327                 XML::addElement($doc, $relocate, 'dfrn:request', $owner['request']);
 328                 XML::addElement($doc, $relocate, 'dfrn:confirm', $owner['confirm']);
 329                 XML::addElement($doc, $relocate, 'dfrn:notify', $owner['notify']);
 330                 XML::addElement($doc, $relocate, 'dfrn:poll', $owner['poll']);
 331                 XML::addElement($doc, $relocate, 'dfrn:sitepubkey', DI::config()->get('system', 'site_pubkey'));
 332
 333                 $root->appendChild($relocate);
 334
 335                 return trim($doc->saveXML());
 336         }
 337
 338         /**
 339          * Adds the header elements for the DFRN protocol
 340          *
 341          * @param DOMDocument $doc           XML document
 342          * @param array       $owner         Owner record
 343          * @param string      $authorelement Element name for the author
 344          * @param string      $alternatelink link to profile or category
 345          * @param bool        $public        Is it a header for public posts?
 346          * @return DOMElement XML root element
 347          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 348          * @todo  Find proper type-hint for returned type
 349          */
 350         private static function addHeader(DOMDocument $doc, array $owner, string $authorelement, string $alternatelink = '', bool $public = false): DOMElement
 351         {
 352                 if ($alternatelink == '') {
 353                         $alternatelink = $owner['url'];
 354                 }
 355
 356                 $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
 357                 $doc->appendChild($root);
 358
 359                 $root->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
 360                 $root->setAttribute('xmlns:at', ActivityNamespace::TOMB);
 361                 $root->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
 362                 $root->setAttribute('xmlns:dfrn', ActivityNamespace::DFRN);
 363                 $root->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
 364                 $root->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
 365                 $root->setAttribute('xmlns:poco', ActivityNamespace::POCO);
 366                 $root->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
 367                 $root->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
 368
 369                 XML::addElement($doc, $root, 'id', DI::baseUrl() . '/profile/' . $owner['nick']);
 370                 XML::addElement($doc, $root, 'title', $owner['name']);
 371
 372                 $attributes = ['uri' => 'https://friendi.ca', 'version' => FRIENDICA_VERSION . '-' . DB_UPDATE_VERSION];
 373                 XML::addElement($doc, $root, 'generator', FRIENDICA_PLATFORM, $attributes);
 374
 375                 $attributes = ['rel' => 'license', 'href' => 'http://creativecommons.org/licenses/by/3.0/'];
 376                 XML::addElement($doc, $root, 'link', '', $attributes);
 377
 378                 $attributes = ['rel' => 'alternate', 'type' => 'text/html', 'href' => $alternatelink];
 379                 XML::addElement($doc, $root, 'link', '', $attributes);
 380
 381
 382                 if ($public) {
 383                         // DFRN itself doesn't uses this. But maybe someone else wants to subscribe to the public feed.
 384                         OStatus::addHubLink($doc, $root, $owner['nick']);
 385
 386                         $attributes = ['rel' => 'salmon', 'href' => DI::baseUrl() . '/salmon/' . $owner['nick']];
 387                         XML::addElement($doc, $root, 'link', '', $attributes);
 388
 389                         $attributes = ['rel' => 'http://salmon-protocol.org/ns/salmon-replies', 'href' => DI::baseUrl() . '/salmon/' . $owner['nick']];
 390                         XML::addElement($doc, $root, 'link', '', $attributes);
 391
 392                         $attributes = ['rel' => 'http://salmon-protocol.org/ns/salmon-mention', 'href' => DI::baseUrl() . '/salmon/' . $owner['nick']];
 393                         XML::addElement($doc, $root, 'link', '', $attributes);
 394                 }
 395
 396                 // For backward compatibility we keep this element
 397                 if ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY) {
 398                         XML::addElement($doc, $root, 'dfrn:community', 1);
 399                 }
 400
 401                 // The former element is replaced by this one
 402                 XML::addElement($doc, $root, 'dfrn:account_type', $owner['account-type']);
 403
 404                 /// @todo We need a way to transmit the different page flags like "User::PAGE_FLAGS_PRVGROUP"
 405
 406                 XML::addElement($doc, $root, 'updated', DateTimeFormat::utcNow(DateTimeFormat::ATOM));
 407
 408                 $author = self::addAuthor($doc, $owner, $authorelement, $public);
 409                 $root->appendChild($author);
 410
 411                 return $root;
 412         }
 413
 414         /**
 415          * Determine the next birthday, but only if the birthday is published
 416          * in the default profile. We _could_ also look for a private profile that the
 417          * recipient can see, but somebody could get mad at us if they start getting
 418          * public birthday greetings when they haven't made this info public.
 419          *
 420          * Assuming we are able to publish this info, we are then going to convert
 421          * the start time from the owner's timezone to UTC.
 422          *
 423          * This will potentially solve the problem found with some social networks
 424          * where birthdays are converted to the viewer's timezone and salutations from
 425          * elsewhere in the world show up on the wrong day. We will convert it to the
 426          * viewer's timezone also, but first we are going to convert it from the birthday
 427          * person's timezone to GMT - so the viewer may find the birthday starting at
 428          * 6:00PM the day before, but that will correspond to midnight to the birthday person.
 429          *
 430          * @param int $uid User id
 431          * @param string $tz Time zone string, like UTC
 432          * @return string Formatted birthday string
 433          */
 434         private static function determineNextBirthday(int $uid, string $tz): string
 435         {
 436                 $birthday = '';
 437
 438                 if (!strlen($tz)) {
 439                         $tz = 'UTC';
 440                 }
 441
 442                 $profile = DBA::selectFirst('profile', ['dob'], ['uid' => $uid]);
 443                 if (DBA::isResult($profile)) {
 444                         $tmp_dob = substr($profile['dob'], 5);
 445                         if (intval($tmp_dob)) {
 446                                 $y = DateTimeFormat::timezoneNow($tz, 'Y');
 447                                 $bd = $y . '-' . $tmp_dob . ' 00:00';
 448                                 $t_dob = strtotime($bd);
 449                                 $now = strtotime(DateTimeFormat::timezoneNow($tz));
 450                                 if ($t_dob < $now) {
 451                                         $bd = $y + 1 . '-' . $tmp_dob . ' 00:00';
 452                                 }
 453                                 $birthday = DateTimeFormat::convert($bd, 'UTC', $tz, DateTimeFormat::ATOM);
 454                         }
 455                 }
 456
 457                 return $birthday;
 458         }
 459
 460         /**
 461          * Adds the author element in the header for the DFRN protocol
 462          *
 463          * @param DOMDocument $doc           XML document
 464          * @param array       $owner         Owner record
 465          * @param string      $authorelement Element name for the author
 466          * @param boolean     $public        boolean
 467          * @return DOMElement XML author object
 468          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 469          * @todo  Find proper type-hints
 470          */
 471         private static function addAuthor(DOMDocument $doc, array $owner, string $authorelement, bool $public): DOMElement
 472         {
 473                 // Should the profile be "unsearchable" in the net? Then add the "hide" element
 474                 $hide = DBA::exists('profile', ['uid' => $owner['uid'], 'net-publish' => false]);
 475
 476                 $author = $doc->createElement($authorelement);
 477
 478                 $namdate = DateTimeFormat::utc($owner['name-date'].'+00:00', DateTimeFormat::ATOM);
 479                 $picdate = DateTimeFormat::utc($owner['avatar-date'].'+00:00', DateTimeFormat::ATOM);
 480
 481                 $attributes = [];
 482
 483                 if (!$public || !$hide) {
 484                         $attributes = ['dfrn:updated' => $namdate];
 485                 }
 486
 487                 XML::addElement($doc, $author, 'name', $owner['name'], $attributes);
 488                 XML::addElement($doc, $author, 'uri', DI::baseUrl().'/profile/' . $owner['nickname'], $attributes);
 489                 XML::addElement($doc, $author, 'dfrn:handle', $owner['addr'], $attributes);
 490
 491                 $attributes = [
 492                         'rel' => 'photo',
 493                         'type' => 'image/jpeg',
 494                         'media:width' => Proxy::PIXEL_SMALL,
 495                         'media:height' => Proxy::PIXEL_SMALL,
 496                         'href' => User::getAvatarUrl($owner, Proxy::SIZE_SMALL),
 497                 ];
 498
 499                 if (!$public || !$hide) {
 500                         $attributes['dfrn:updated'] = $picdate;
 501                 }
 502
 503                 XML::addElement($doc, $author, 'link', '', $attributes);
 504
 505                 $attributes['rel'] = 'avatar';
 506                 XML::addElement($doc, $author, 'link', '', $attributes);
 507
 508                 if ($hide) {
 509                         XML::addElement($doc, $author, 'dfrn:hide', 'true');
 510                 }
 511
 512                 // The following fields will only be generated if the data isn't meant for a public feed
 513                 if ($public) {
 514                         return $author;
 515                 }
 516
 517                 $birthday = self::determineNextBirthday($owner['uid'], $owner['timezone']);
 518
 519                 if ($birthday) {
 520                         XML::addElement($doc, $author, 'dfrn:birthday', $birthday);
 521                 }
 522
 523                 // Only show contact details when we are allowed to
 524                 $profile = DBA::selectFirst('owner-view',
 525                         ['about', 'name', 'homepage', 'nickname', 'timezone', 'locality', 'region', 'country-name', 'pub_keywords', 'xmpp', 'dob'],
 526                         ['uid' => $owner['uid'], 'hidewall' => false]);
 527                 if (DBA::isResult($profile)) {
 528                         XML::addElement($doc, $author, 'poco:displayName', $profile['name']);
 529                         XML::addElement($doc, $author, 'poco:updated', $namdate);
 530
 531                         if (trim($profile['dob']) > DBA::NULL_DATE) {
 532                                 XML::addElement($doc, $author, 'poco:birthday', '0000-'.date('m-d', strtotime($profile['dob'])));
 533                         }
 534
 535                         XML::addElement($doc, $author, 'poco:note', $profile['about']);
 536                         XML::addElement($doc, $author, 'poco:preferredUsername', $profile['nickname']);
 537
 538                         XML::addElement($doc, $author, 'poco:utcOffset', DateTimeFormat::timezoneNow($profile['timezone'], 'P'));
 539
 540                         if (trim($profile['homepage']) != '') {
 541                                 $urls = $doc->createElement('poco:urls');
 542                                 XML::addElement($doc, $urls, 'poco:type', 'homepage');
 543                                 XML::addElement($doc, $urls, 'poco:value', $profile['homepage']);
 544                                 XML::addElement($doc, $urls, 'poco:primary', 'true');
 545                                 $author->appendChild($urls);
 546                         }
 547
 548                         if (trim($profile['pub_keywords']) != '') {
 549                                 $keywords = explode(',', $profile['pub_keywords']);
 550
 551                                 foreach ($keywords as $keyword) {
 552                                         XML::addElement($doc, $author, 'poco:tags', trim($keyword));
 553                                 }
 554                         }
 555
 556                         if (trim($profile['xmpp']) != '') {
 557                                 $ims = $doc->createElement('poco:ims');
 558                                 XML::addElement($doc, $ims, 'poco:type', 'xmpp');
 559                                 XML::addElement($doc, $ims, 'poco:value', $profile['xmpp']);
 560                                 XML::addElement($doc, $ims, 'poco:primary', 'true');
 561                                 $author->appendChild($ims);
 562                         }
 563
 564                         if (trim($profile['locality'] . $profile['region'] . $profile['country-name']) != '') {
 565                                 $element = $doc->createElement('poco:address');
 566
 567                                 XML::addElement($doc, $element, 'poco:formatted', Profile::formatLocation($profile));
 568
 569                                 if (trim($profile['locality']) != '') {
 570                                         XML::addElement($doc, $element, 'poco:locality', $profile['locality']);
 571                                 }
 572
 573                                 if (trim($profile['region']) != '') {
 574                                         XML::addElement($doc, $element, 'poco:region', $profile['region']);
 575                                 }
 576
 577                                 if (trim($profile['country-name']) != '') {
 578                                         XML::addElement($doc, $element, 'poco:country', $profile['country-name']);
 579                                 }
 580
 581                                 $author->appendChild($element);
 582                         }
 583                 }
 584
 585                 return $author;
 586         }
 587
 588         /**
 589          * Adds the author elements in the "entry" elements of the DFRN protocol
 590          *
 591          * @param DOMDocument $doc         XML document
 592          * @param string      $element     Element name for the author
 593          * @param string      $contact_url Link of the contact
 594          * @param array       $item        Item elements
 595          * @return DOMElement XML author object
 596          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 597          * @todo  Find proper type-hints
 598          */
 599         private static function addEntryAuthor(DOMDocument $doc, string $element, string $contact_url, array $item): DOMElement
 600         {
 601                 $author = $doc->createElement($element);
 602
 603                 $contact = Contact::getByURLForUser($contact_url, $item['uid'], false, ['url', 'name', 'addr', 'photo']);
 604                 if (!empty($contact)) {
 605                         XML::addElement($doc, $author, 'name', $contact['name']);
 606                         XML::addElement($doc, $author, 'uri', $contact['url']);
 607                         XML::addElement($doc, $author, 'dfrn:handle', $contact['addr']);
 608
 609                         /// @Todo
 610                         /// - Check real image type and image size
 611                         /// - Check which of these boths elements we should use
 612                         $attributes = [
 613                                 'rel' => 'photo',
 614                                 'type' => 'image/jpeg',
 615                                 'media:width' => 80,
 616                                 'media:height' => 80,
 617                                 'href' => $contact['photo'],
 618                         ];
 619                         XML::addElement($doc, $author, 'link', '', $attributes);
 620
 621                         $attributes = [
 622                                 'rel' => 'avatar',
 623                                 'type' => 'image/jpeg',
 624                                 'media:width' => 80,
 625                                 'media:height' => 80,
 626                                 'href' => $contact['photo'],
 627                         ];
 628                         XML::addElement($doc, $author, 'link', '', $attributes);
 629                 }
 630
 631                 return $author;
 632         }
 633
 634         /**
 635          * Adds the activity elements
 636          *
 637          * @param DOMDocument $doc      XML document
 638          * @param string      $element  Element name for the activity
 639          * @param string      $activity activity value
 640          * @param int         $uriid    Uri-Id of the post
 641          * @return DOMElement XML activity object
 642          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 643          * @todo  Find proper type-hints
 644          */
 645         private static function createActivity(DOMDocument $doc, string $element, string $activity, int $uriid)
 646         {
 647                 if ($activity) {
 648                         $entry = $doc->createElement($element);
 649
 650                         $r = XML::parseString($activity);
 651                         if (!$r) {
 652                                 return false;
 653                         }
 654
 655                         if ($r->type) {
 656                                 XML::addElement($doc, $entry, "activity:object-type", $r->type);
 657                         }
 658
 659                         if ($r->id) {
 660                                 XML::addElement($doc, $entry, "id", $r->id);
 661                         }
 662
 663                         if ($r->title) {
 664                                 XML::addElement($doc, $entry, "title", $r->title);
 665                         }
 666
 667                         if ($r->link) {
 668                                 if (substr($r->link, 0, 1) == '<') {
 669                                         if (strstr($r->link, '&') && (! strstr($r->link, '&amp;'))) {
 670                                                 $r->link = str_replace('&', '&amp;', $r->link);
 671                                         }
 672
 673                                         $r->link = preg_replace('/\<link(.*?)\"\>/', '<link$1"/>', $r->link);
 674
 675                                         // XML does need a single element as root element so we add a dummy element here
 676                                         $data = XML::parseString("<dummy>" . $r->link . "</dummy>");
 677                                         if (is_object($data)) {
 678                                                 foreach ($data->link as $link) {
 679                                                         $attributes = [];
 680                                                         foreach ($link->attributes() as $parameter => $value) {
 681                                                                 $attributes[$parameter] = $value;
 682                                                         }
 683                                                         XML::addElement($doc, $entry, "link", "", $attributes);
 684                                                 }
 685                                         }
 686                                 } else {
 687                                         $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $r->link];
 688                                         XML::addElement($doc, $entry, "link", "", $attributes);
 689                                 }
 690                         }
 691                         if ($r->content) {
 692                                 XML::addElement($doc, $entry, "content", BBCode::convertForUriId($uriid, $r->content, BBCode::EXTERNAL), ["type" => "html"]);
 693                         }
 694
 695                         return $entry;
 696                 }
 697
 698                 return false;
 699         }
 700
 701         /**
 702          * Adds the elements for attachments
 703          *
 704          * @param object $doc  XML document
 705          * @param object $root XML root
 706          * @param array  $item Item element
 707          *
 708          * @return void XML attachment object
 709          * @todo  Find proper type-hints
 710          */
 711         private static function getAttachment($doc, $root, array $item)
 712         {
 713                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
 714                         $attributes = ['rel' => 'enclosure',
 715                                 'href' => $attachment['url'],
 716                                 'type' => $attachment['mimetype']];
 717
 718                         if (!empty($attachment['size'])) {
 719                                 $attributes['length'] = intval($attachment['size']);
 720                         }
 721                         if (!empty($attachment['description'])) {
 722                                 $attributes['title'] = $attachment['description'];
 723                         }
 724
 725                         XML::addElement($doc, $root, 'link', '', $attributes);
 726                 }
 727         }
 728
 729         /**
 730          * Adds the "entry" elements for the DFRN protocol
 731          *
 732          * @param DOMDocument $doc     XML document
 733          * @param string      $type    "text" or "html"
 734          * @param array       $item    Item element
 735          * @param array       $owner   Owner record
 736          * @param bool        $comment Trigger the sending of the "comment" element
 737          * @param int         $cid     Contact ID of the recipient
 738          * @param bool        $single  If set, the entry is created as an XML document with a single "entry" element
 739          *
 740          * @return null|\DOMElement XML entry object
 741          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 742          * @throws \ImagickException
 743          * @todo  Find proper type-hints
 744          */
 745         private static function entry(DOMDocument $doc, string $type, array $item, array $owner, bool $comment = false, int $cid = 0, bool $single = false)
 746         {
 747                 $mentioned = [];
 748
 749                 if (!$item['parent']) {
 750                         Logger::warning('Item without parent found.', ['type' => $type, 'item' => $item]);
 751                         return null;
 752                 }
 753
 754                 if ($item['deleted']) {
 755                         $attributes = ["ref" => $item['uri'], "when" => DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM)];
 756                         return XML::createElement($doc, "at:deleted-entry", "", $attributes);
 757                 }
 758
 759                 if (!$single) {
 760                         $entry = $doc->createElement("entry");
 761                 } else {
 762                         $entry = $doc->createElementNS(ActivityNamespace::ATOM1, 'entry');
 763                         $doc->appendChild($entry);
 764
 765                         $entry->setAttribute("xmlns:thr", ActivityNamespace::THREAD);
 766                         $entry->setAttribute("xmlns:at", ActivityNamespace::TOMB);
 767                         $entry->setAttribute("xmlns:media", ActivityNamespace::MEDIA);
 768                         $entry->setAttribute("xmlns:dfrn", ActivityNamespace::DFRN);
 769                         $entry->setAttribute("xmlns:activity", ActivityNamespace::ACTIVITY);
 770                         $entry->setAttribute("xmlns:georss", ActivityNamespace::GEORSS);
 771                         $entry->setAttribute("xmlns:poco", ActivityNamespace::POCO);
 772                         $entry->setAttribute("xmlns:ostatus", ActivityNamespace::OSTATUS);
 773                         $entry->setAttribute("xmlns:statusnet", ActivityNamespace::STATUSNET);
 774                 }
 775
 776                 $body = Post\Media::addAttachmentsToBody($item['uri-id'], $item['body'] ?? '');
 777
 778                 if ($item['private'] == Item::PRIVATE) {
 779                         $body = Item::fixPrivatePhotos($body, $owner['uid'], $item, $cid);
 780                 }
 781
 782                 // Remove the abstract element. It is only locally important.
 783                 $body = BBCode::stripAbstract($body);
 784
 785                 $htmlbody = '';
 786                 if ($type == 'html') {
 787                         $htmlbody = $body;
 788
 789                         if ($item['title'] != "") {
 790                                 $htmlbody = "[b]" . $item['title'] . "[/b]\n\n" . $htmlbody;
 791                         }
 792
 793                         $htmlbody = BBCode::convertForUriId($item['uri-id'], $htmlbody, BBCode::ACTIVITYPUB);
 794                 }
 795
 796                 $author = self::addEntryAuthor($doc, "author", $item["author-link"], $item);
 797                 $entry->appendChild($author);
 798
 799                 $dfrnowner = self::addEntryAuthor($doc, "dfrn:owner", $item["owner-link"], $item);
 800                 $entry->appendChild($dfrnowner);
 801
 802                 if ($item['gravity'] != Item::GRAVITY_PARENT) {
 803                         $parent = Post::selectFirst(['guid', 'plink'], ['uri' => $item['thr-parent'], 'uid' => $item['uid']]);
 804                         if (DBA::isResult($parent)) {
 805                                 $attributes = ["ref" => $item['thr-parent'], "type" => "text/html",
 806                                         "href" => $parent['plink'],
 807                                         "dfrn:diaspora_guid" => $parent['guid']];
 808                                 XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
 809                         }
 810                 }
 811
 812                 // Add conversation data. This is used for OStatus
 813                 $attributes = [
 814                         'href' => $item['conversation'],
 815                         'ref' => $item['conversation'],
 816                 ];
 817
 818                 XML::addElement($doc, $entry, 'ostatus:conversation', $item['conversation'], $attributes);
 819
 820                 XML::addElement($doc, $entry, 'id', $item['uri']);
 821                 XML::addElement($doc, $entry, 'title', $item['title']);
 822
 823                 XML::addElement($doc, $entry, 'published', DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM));
 824                 XML::addElement($doc, $entry, 'updated', DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM));
 825
 826                 // "dfrn:env" is used to read the content
 827                 XML::addElement($doc, $entry, 'dfrn:env', Strings::base64UrlEncode($body, true));
 828
 829                 // The "content" field is not read by the receiver. We could remove it when the type is "text"
 830                 // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
 831                 XML::addElement($doc, $entry, 'content', (($type == 'html') ? $htmlbody : $body), ['type' => $type]);
 832
 833                 // We save this value in "plink". Maybe we should read it from there as well?
 834                 XML::addElement(
 835                         $doc,
 836                         $entry,
 837                         'link',
 838                         '',
 839                         [
 840                                 'rel' => 'alternate',
 841                                 'type' => 'text/html',
 842                                 'href' => DI::baseUrl() . '/display/' . $item['guid']
 843                         ],
 844                 );
 845
 846                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
 847                 // It is included in the rewritten code for completeness
 848                 if ($comment) {
 849                         XML::addElement($doc, $entry, 'dfrn:comment-allow', 1);
 850                 }
 851
 852                 if ($item['location']) {
 853                         XML::addElement($doc, $entry, 'dfrn:location', $item['location']);
 854                 }
 855
 856                 if ($item['coord']) {
 857                         XML::addElement($doc, $entry, 'georss:point', $item['coord']);
 858                 }
 859
 860                 if ($item['private']) {
 861                         // Friendica versions prior to 2020.3 can't handle "unlisted" properly. So we can only transmit public and private
 862                         XML::addElement($doc, $entry, 'dfrn:private', ($item['private'] == Item::PRIVATE ? Item::PRIVATE : Item::PUBLIC));
 863                         XML::addElement($doc, $entry, 'dfrn:unlisted', $item['private'] == Item::UNLISTED);
 864                 }
 865
 866                 if ($item['extid']) {
 867                         XML::addElement($doc, $entry, 'dfrn:extid', $item['extid']);
 868                 }
 869
 870                 if ($item['post-type'] == Item::PT_PAGE) {
 871                         XML::addElement($doc, $entry, 'dfrn:bookmark', 'true');
 872                 }
 873
 874                 if ($item['app']) {
 875                         XML::addElement($doc, $entry, 'statusnet:notice_info', '', ['local_id' => $item['id'], 'source' => $item['app']]);
 876                 }
 877
 878                 XML::addElement($doc, $entry, 'dfrn:diaspora_guid', $item['guid']);
 879
 880                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
 881                 // It is needed for relayed comments to Diaspora.
 882                 if ($item['signed_text']) {
 883                         $sign = base64_encode(json_encode(['signed_text' => $item['signed_text'],'signature' => '','signer' => '']));
 884                         XML::addElement($doc, $entry, 'dfrn:diaspora_signature', $sign);
 885                 }
 886
 887                 XML::addElement($doc, $entry, 'activity:verb', self::constructVerb($item));
 888
 889                 if ($item['object-type'] != '') {
 890                         XML::addElement($doc, $entry, 'activity:object-type', $item['object-type']);
 891                 } elseif ($item['gravity'] == Item::GRAVITY_PARENT) {
 892                         XML::addElement($doc, $entry, 'activity:object-type', Activity\ObjectType::NOTE);
 893                 } else {
 894                         XML::addElement($doc, $entry, 'activity:object-type', Activity\ObjectType::COMMENT);
 895                 }
 896
 897                 $actobj = self::createActivity($doc, 'activity:object', $item['object'] ?? '', $item['uri-id']);
 898                 if ($actobj) {
 899                         $entry->appendChild($actobj);
 900                 }
 901
 902                 $actarg = self::createActivity($doc, 'activity:target', $item['target'] ?? '', $item['uri-id']);
 903                 if ($actarg) {
 904                         $entry->appendChild($actarg);
 905                 }
 906
 907                 $tags = Tag::getByURIId($item['uri-id']);
 908
 909                 if (count($tags)) {
 910                         foreach ($tags as $tag) {
 911                                 if (($type != 'html') || ($tag['type'] == Tag::HASHTAG)) {
 912                                         XML::addElement($doc, $entry, 'category', '', ['scheme' => 'X-DFRN:' . Tag::TAG_CHARACTER[$tag['type']] . ':' . $tag['url'], 'term' => $tag['name']]);
 913                                 }
 914                                 if ($tag['type'] != Tag::HASHTAG) {
 915                                         $mentioned[$tag['url']] = $tag['url'];
 916                                 }
 917                         }
 918                 }
 919
 920                 foreach ($mentioned as $mention) {
 921                         $condition = ['uid' => $owner['uid'], 'nurl' => Strings::normaliseLink($mention)];
 922                         $contact = DBA::selectFirst('contact', ['contact-type'], $condition);
 923
 924                         if (DBA::isResult($contact) && ($contact['contact-type'] == Contact::TYPE_COMMUNITY)) {
 925                                 XML::addElement(
 926                                         $doc,
 927                                         $entry,
 928                                         'link',
 929                                         '',
 930                                         [
 931                                                 'rel' => 'mentioned',
 932                                                 'ostatus:object-type' => Activity\ObjectType::GROUP,
 933                                                 'href' => $mention,
 934                                         ],
 935                                 );
 936                         } else {
 937                                 XML::addElement(
 938                                         $doc,
 939                                         $entry,
 940                                         'link',
 941                                         '',
 942                                         [
 943                                                 'rel' => 'mentioned',
 944                                                 'ostatus:object-type' => Activity\ObjectType::PERSON,
 945                                                 'href' => $mention,
 946                                         ],
 947                                 );
 948                         }
 949                 }
 950
 951                 self::getAttachment($doc, $entry, $item);
 952
 953                 return $entry;
 954         }
 955
 956         /**
 957          * Transmits atom content to the contacts via the Diaspora transport layer
 958          *
 959          * @param array  $owner   Owner record
 960          * @param array  $contact Contact record of the receiver
 961          * @param string $atom    Content that will be transmitted
 962          * @param bool   $public_batch
 963          * @return int Deliver status. Negative values mean an error.
 964          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 965          * @throws \ImagickException
 966          */
 967         public static function transmit(array $owner, array $contact, string $atom, bool $public_batch = false)
 968         {
 969                 if (!$public_batch) {
 970                         if (empty($contact['addr'])) {
 971                                 Logger::notice('Empty contact handle for ' . $contact['id'] . ' - ' . $contact['url'] . ' - trying to update it.');
 972                                 if (Contact::updateFromProbe($contact['id'])) {
 973                                         $new_contact = DBA::selectFirst('contact', ['addr'], ['id' => $contact['id']]);
 974                                         $contact['addr'] = $new_contact['addr'];
 975                                 }
 976
 977                                 if (empty($contact['addr'])) {
 978                                         Logger::notice('Unable to find contact handle for ' . $contact['id'] . ' - ' . $contact['url']);
 979                                         return -21;
 980                                 }
 981                         }
 982
 983                         $fcontact = FContact::getByURL($contact['addr']);
 984                         if (empty($fcontact)) {
 985                                 Logger::notice('Unable to find contact details for ' . $contact['id'] . ' - ' . $contact['addr']);
 986                                 return -22;
 987                         }
 988                         $pubkey = $fcontact['pubkey'] ?? '';
 989                 } else {
 990                         $pubkey = '';
 991                 }
 992
 993                 $envelope = Diaspora::buildMessage($atom, $owner, $contact, $owner['uprvkey'], $pubkey, $public_batch);
 994
 995                 // Create the endpoint for public posts. This is some WIP and should later be added to the probing
 996                 if ($public_batch && empty($contact['batch'])) {
 997                         $parts = parse_url($contact['notify']);
 998                         $path_parts = explode('/', $parts['path']);
 999                         array_pop($path_parts);
1000                         $parts['path'] =  implode('/', $path_parts);
1001                         $contact['batch'] = (string)Uri::fromParts($parts);
1002                 }
1003
1004                 $dest_url = ($public_batch ? $contact['batch'] : $contact['notify']);
1005
1006                 if (empty($dest_url)) {
1007                         Logger::info('Empty destination', ['public' => $public_batch, 'contact' => $contact]);
1008                         return -24;
1009                 }
1010
1011                 $content_type = ($public_batch ? 'application/magic-envelope+xml' : 'application/json');
1012
1013                 $postResult = DI::httpClient()->post($dest_url, $envelope, ['Content-Type' => $content_type]);
1014                 $xml = $postResult->getBody();
1015
1016                 $curl_stat = $postResult->getReturnCode();
1017                 if (empty($curl_stat) || empty($xml)) {
1018                         Logger::notice('Empty answer from ' . $contact['id'] . ' - ' . $dest_url);
1019                         return -9; // timed out
1020                 }
1021
1022                 if (($curl_stat == 503) && $postResult->inHeader('retry-after')) {
1023                         return -10;
1024                 }
1025
1026                 if (strpos($xml, '<?xml') === false) {
1027                         Logger::notice('No valid XML returned from ' . $contact['id'] . ' - ' . $dest_url);
1028                         Logger::debug('Returned XML: ' . $xml);
1029                         return 3;
1030                 }
1031
1032                 $res = XML::parseString($xml);
1033
1034                 if (empty($res->status)) {
1035                         return -23;
1036                 }
1037
1038                 if (!empty($res->message)) {
1039                         Logger::info('Transmit to ' . $dest_url . ' returned status '.$res->status.' - '.$res->message);
1040                 }
1041
1042                 return intval($res->status);
1043         }
1044
1045         /**
1046          * Fetch the author data from head or entry items
1047          *
1048          * @param \DOMXPath $xpath     XPath object
1049          * @param \DOMNode  $context   In which context should the data be searched
1050          * @param array     $importer  Record of the importer user mixed with contact of the content
1051          * @param string    $element   Element name from which the data is fetched
1052          * @param bool      $onlyfetch Should the data only be fetched or should it update the contact record as well
1053          * @param string    $xml       optional, default empty
1054          *
1055          * @return array Relevant data of the author
1056          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1057          * @throws \ImagickException
1058          * @todo  Find good type-hints for all parameter
1059          */
1060         private static function fetchauthor(\DOMXPath $xpath, \DOMNode $context, array $importer, string $element, bool $onlyfetch, string $xml = ''): array
1061         {
1062                 $author = [];
1063                 $author["name"] = XML::getFirstNodeValue($xpath, $element."/atom:name/text()", $context);
1064                 $author["link"] = XML::getFirstNodeValue($xpath, $element."/atom:uri/text()", $context);
1065
1066                 $fields = ['id', 'uid', 'url', 'network', 'avatar-date', 'avatar', 'name-date', 'uri-date', 'addr',
1067                         'name', 'nick', 'about', 'location', 'keywords', 'xmpp', 'bdyear', 'bd', 'hidden', 'contact-type'];
1068                 $condition = ["`uid` = ? AND `nurl` = ? AND `network` != ? AND NOT `pending` AND NOT `blocked`",
1069                         $importer["importer_uid"], Strings::normaliseLink($author["link"]), Protocol::STATUSNET];
1070
1071                 if ($importer['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1072                         $condition = DBA::mergeConditions($condition, ['rel' => [Contact::SHARING, Contact::FRIEND]]);
1073                 }
1074
1075                 $contact_old = DBA::selectFirst('contact', $fields, $condition);
1076
1077                 if (DBA::isResult($contact_old)) {
1078                         $author["contact-id"] = $contact_old["id"];
1079                         $author["network"] = $contact_old["network"];
1080                 } else {
1081                         Logger::info('Contact not found', ['condition' => $condition]);
1082
1083                         $author["contact-unknown"] = true;
1084                         $contact = Contact::getByURL($author["link"], null, ["id", "network"]);
1085                         $author["contact-id"] = $contact["id"] ?? $importer["id"];
1086                         $author["network"] = $contact["network"] ?? $importer["network"];
1087                         $onlyfetch = true;
1088                 }
1089
1090                 // Until now we aren't serving different sizes - but maybe later
1091                 $avatarlist = [];
1092                 /// @todo check if "avatar" or "photo" would be the best field in the specification
1093                 $avatars = $xpath->query($element . "/atom:link[@rel='avatar']", $context);
1094                 foreach ($avatars as $avatar) {
1095                         $href = "";
1096                         $width = 0;
1097                         foreach ($avatar->attributes as $attributes) {
1098                                 /// @TODO Rewrite these similar if() to one switch
1099                                 if ($attributes->name == "href") {
1100                                         $href = $attributes->textContent;
1101                                 }
1102                                 if ($attributes->name == "width") {
1103                                         $width = $attributes->textContent;
1104                                 }
1105                                 if ($attributes->name == "updated") {
1106                                         $author["avatar-date"] = $attributes->textContent;
1107                                 }
1108                         }
1109                         if (($width > 0) && ($href != "")) {
1110                                 $avatarlist[$width] = $href;
1111                         }
1112                 }
1113
1114                 if (count($avatarlist) > 0) {
1115                         krsort($avatarlist);
1116                         $author["avatar"] = current($avatarlist);
1117                 }
1118
1119                 if (empty($author['avatar']) && !empty($author['link'])) {
1120                         $cid = Contact::getIdForURL($author['link'], 0);
1121                         if (!empty($cid)) {
1122                                 $contact = DBA::selectFirst('contact', ['avatar'], ['id' => $cid]);
1123                                 if (DBA::isResult($contact)) {
1124                                         $author['avatar'] = $contact['avatar'];
1125                                 }
1126                         }
1127                 }
1128
1129                 if (empty($author['avatar'])) {
1130                         Logger::notice('Empty author: ' . $xml);
1131                         $author['avatar'] = '';
1132                 }
1133
1134                 if (DBA::isResult($contact_old) && !$onlyfetch) {
1135                         Logger::info("Check if contact details for contact " . $contact_old["id"] . " (" . $contact_old["nick"] . ") have to be updated.");
1136
1137                         $poco = ["url" => $contact_old["url"], "network" => $contact_old["network"]];
1138
1139                         // When was the last change to name or uri?
1140                         $name_element = $xpath->query($element . "/atom:name", $context)->item(0);
1141                         foreach ($name_element->attributes as $attributes) {
1142                                 if ($attributes->name == "updated") {
1143                                         $poco["name-date"] = $attributes->textContent;
1144                                 }
1145                         }
1146
1147                         $link_element = $xpath->query($element . "/atom:link", $context)->item(0);
1148                         foreach ($link_element->attributes as $attributes) {
1149                                 if ($attributes->name == "updated") {
1150                                         $poco["uri-date"] = $attributes->textContent;
1151                                 }
1152                         }
1153
1154                         // Update contact data
1155                         $value = XML::getFirstNodeValue($xpath, $element . "/dfrn:handle/text()", $context);
1156                         if ($value != "") {
1157                                 $poco["addr"] = $value;
1158                         }
1159
1160                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:displayName/text()", $context);
1161                         if ($value != "") {
1162                                 $poco["name"] = $value;
1163                         }
1164
1165                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:preferredUsername/text()", $context);
1166                         if ($value != "") {
1167                                 $poco["nick"] = $value;
1168                         }
1169
1170                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:note/text()", $context);
1171                         if ($value != "") {
1172                                 $poco["about"] = $value;
1173                         }
1174
1175                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:address/poco:formatted/text()", $context);
1176                         if ($value != "") {
1177                                 $poco["location"] = $value;
1178                         }
1179
1180                         /// @todo Only search for elements with "poco:type" = "xmpp"
1181                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:ims/poco:value/text()", $context);
1182                         if ($value != "") {
1183                                 $poco["xmpp"] = $value;
1184                         }
1185
1186                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1187                         /// - poco:utcOffset
1188                         /// - poco:urls
1189                         /// - poco:locality
1190                         /// - poco:region
1191                         /// - poco:country
1192
1193                         // If the "hide" element is present then the profile isn't searchable.
1194                         $hide = intval(XML::getFirstNodeValue($xpath, $element . "/dfrn:hide/text()", $context) == "true");
1195
1196                         Logger::info("Hidden status for contact " . $contact_old["url"] . ": " . $hide);
1197
1198                         // If the contact isn't searchable then set the contact to "hidden".
1199                         // Problem: This can be manually overridden by the user.
1200                         if ($hide) {
1201                                 $contact_old["hidden"] = true;
1202                         }
1203
1204                         // Save the keywords into the contact table
1205                         $tags = [];
1206                         $tagelements = $xpath->evaluate($element . "/poco:tags/text()", $context);
1207                         foreach ($tagelements as $tag) {
1208                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1209                         }
1210
1211                         if (count($tags)) {
1212                                 $poco["keywords"] = implode(", ", $tags);
1213                         }
1214
1215                         // "dfrn:birthday" contains the birthday converted to UTC
1216                         $birthday = XML::getFirstNodeValue($xpath, $element . "/dfrn:birthday/text()", $context);
1217                         try {
1218                                 $birthday_date = new \DateTime($birthday);
1219                                 if ($birthday_date > new \DateTime()) {
1220                                         $poco["bdyear"] = $birthday_date->format("Y");
1221                                 }
1222                         } catch (\Exception $e) {
1223                                 // Invalid birthday
1224                         }
1225
1226                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1227                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:birthday/text()", $context);
1228
1229                         if (!in_array($value, ["", "0000-00-00", DBA::NULL_DATE])) {
1230                                 $bdyear = date("Y");
1231                                 $value = str_replace(["0000", "0001"], $bdyear, $value);
1232
1233                                 if (strtotime($value) < time()) {
1234                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1235                                 }
1236
1237                                 $poco["bd"] = $value;
1238                         }
1239
1240                         $contact = array_merge($contact_old, $poco);
1241
1242                         if ($contact_old["bdyear"] != $contact["bdyear"]) {
1243                                 Event::createBirthday($contact, $birthday);
1244                         }
1245
1246                         $fields = ['name' => $contact['name'], 'nick' => $contact['nick'], 'about' => $contact['about'],
1247                                 'location' => $contact['location'], 'addr' => $contact['addr'], 'keywords' => $contact['keywords'],
1248                                 'bdyear' => $contact['bdyear'], 'bd' => $contact['bd'], 'hidden' => $contact['hidden'],
1249                                 'xmpp' => $contact['xmpp'], 'name-date' => DateTimeFormat::utc($contact['name-date']),
1250                                 'unsearchable' => $contact['hidden'], 'uri-date' => DateTimeFormat::utc($contact['uri-date'])];
1251
1252                         Contact::update($fields, ['id' => $contact['id'], 'network' => $contact['network']], $contact_old);
1253
1254                         // Update the public contact. Don't set the "hidden" value, this is used differently for public contacts
1255                         unset($fields['hidden']);
1256                         $condition = ['uid' => 0, 'nurl' => Strings::normaliseLink($contact_old['url'])];
1257                         Contact::update($fields, $condition, true);
1258
1259                         Contact::updateAvatar($contact['id'], $author['avatar']);
1260
1261                         $pcid = Contact::getIdForURL($contact_old['url']);
1262                         if (!empty($pcid)) {
1263                                 Contact::updateAvatar($pcid, $author['avatar']);
1264                         }
1265                 }
1266
1267                 return $author;
1268         }
1269
1270         /**
1271          * Transforms activity objects into an XML string
1272          *
1273          * @param object $xpath    XPath object
1274          * @param object $activity Activity object
1275          * @param string $element  element name
1276          *
1277          * @return string XML string
1278          * @todo Find good type-hints for all parameter
1279          */
1280         private static function transformActivity($xpath, $activity, string $element): string
1281         {
1282                 if (!is_object($activity)) {
1283                         return "";
1284                 }
1285
1286                 $obj_doc = new DOMDocument("1.0", "utf-8");
1287                 $obj_doc->formatOutput = true;
1288
1289                 $obj_element = $obj_doc->createElementNS( ActivityNamespace::ATOM1, $element);
1290
1291                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1292                 XML::addElement($obj_doc, $obj_element, "type", $activity_type);
1293
1294                 $id = $xpath->query("atom:id", $activity)->item(0);
1295                 if (is_object($id)) {
1296                         $obj_element->appendChild($obj_doc->importNode($id, true));
1297                 }
1298
1299                 $title = $xpath->query("atom:title", $activity)->item(0);
1300                 if (is_object($title)) {
1301                         $obj_element->appendChild($obj_doc->importNode($title, true));
1302                 }
1303
1304                 $links = $xpath->query("atom:link", $activity);
1305                 if (is_object($links)) {
1306                         foreach ($links as $link) {
1307                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1308                         }
1309                 }
1310
1311                 $content = $xpath->query("atom:content", $activity)->item(0);
1312                 if (is_object($content)) {
1313                         $obj_element->appendChild($obj_doc->importNode($content, true));
1314                 }
1315
1316                 $obj_doc->appendChild($obj_element);
1317
1318                 $objxml = $obj_doc->saveXML($obj_element);
1319
1320                 /// @todo This isn't totally clean. We should find a way to transform the namespaces
1321                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1322                 return($objxml);
1323         }
1324
1325         /**
1326          * Processes the mail elements
1327          *
1328          * @param DOMXPath $xpath    XPath object
1329          * @param DOMNode  $mail     mail elements
1330          * @param array    $importer Record of the importer user mixed with contact of the content
1331          * @return void
1332          * @throws \Exception
1333          */
1334         private static function processMail(DOMXPath $xpath, DOMNode $mail, array $importer)
1335         {
1336                 Logger::notice("Processing mails");
1337
1338                 $msg = [];
1339                 $msg['uid'] = $importer['importer_uid'];
1340                 $msg['from-name'] = XML::getFirstValue($xpath, 'dfrn:sender/dfrn:name/text()', $mail);
1341                 $msg['from-url'] = XML::getFirstValue($xpath, 'dfrn:sender/dfrn:uri/text()', $mail);
1342                 $msg['from-photo'] = XML::getFirstValue($xpath, 'dfrn:sender/dfrn:avatar/text()', $mail);
1343                 $msg['contact-id'] = $importer['id'];
1344                 $msg['uri'] = XML::getFirstValue($xpath, 'dfrn:id/text()', $mail);
1345                 $msg['parent-uri'] = XML::getFirstValue($xpath, 'dfrn:in-reply-to/text()', $mail);
1346                 $msg['created'] = DateTimeFormat::utc(XML::getFirstValue($xpath, 'dfrn:sentdate/text()', $mail));
1347                 $msg['title'] = XML::getFirstValue($xpath, 'dfrn:subject/text()', $mail);
1348                 $msg['body'] = XML::getFirstValue($xpath, 'dfrn:content/text()', $mail);
1349
1350                 Mail::insert($msg);
1351         }
1352
1353         /**
1354          * Processes the suggestion elements
1355          *
1356          * @param DOMXPath $xpath      XPath object
1357          * @param DOMNode  $suggestion suggestion elements
1358          * @param array    $importer   Record of the importer user mixed with contact of the content
1359          * @return boolean
1360          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1361          */
1362         private static function processSuggestion(DOMXPath $xpath, DOMNode $suggestion, array $importer)
1363         {
1364                 Logger::notice('Processing suggestions');
1365
1366                 $url = $xpath->evaluate('string(dfrn:url[1]/text())', $suggestion);
1367                 $cid = Contact::getIdForURL($url);
1368                 $note = $xpath->evaluate('string(dfrn:note[1]/text())', $suggestion);
1369
1370                 return self::addSuggestion($importer['importer_uid'], $cid, $importer['id'], $note);
1371         }
1372
1373         /**
1374          * Suggest a given contact to a given user from a given contact
1375          *
1376          * @param integer $uid
1377          * @param integer $cid
1378          * @param integer $from_cid
1379          * @return bool   Was the adding successful?
1380          */
1381         private static function addSuggestion(int $uid, int $cid, int $from_cid, string $note = ''): bool
1382         {
1383                 $owner = User::getOwnerDataById($uid);
1384                 $contact = Contact::getById($cid);
1385                 $from_contact = Contact::getById($from_cid);
1386
1387                 if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($contact['url']), 'uid' => $uid])) {
1388                         return false;
1389                 }
1390
1391                 // Quit if we already have an introduction for this person
1392                 if (DI::intro()->suggestionExistsForUser($cid, $uid)) {
1393                         return false;
1394                 }
1395
1396                 $suggest = [];
1397                 $suggest['uid'] = $uid;
1398                 $suggest['cid'] = $from_cid;
1399                 $suggest['url'] = $contact['url'];
1400                 $suggest['name'] = $contact['name'];
1401                 $suggest['photo'] = $contact['photo'];
1402                 $suggest['request'] = $contact['request'];
1403                 $suggest['title'] = '';
1404                 $suggest['body'] = $note;
1405
1406                 DI::intro()->save(DI::introFactory()->createNew(
1407                         $suggest['uid'],
1408                         $suggest['cid'],
1409                         $suggest['body'],
1410                         null,
1411                         $cid
1412                 ));
1413
1414                 DI::notify()->createFromArray([
1415                         'type'  => Notification\Type::SUGGEST,
1416                         'otype' => Notification\ObjectType::INTRO,
1417                         'verb'  => Activity::REQ_FRIEND,
1418                         'uid'   => $owner['uid'],
1419                         'cid'   => $from_contact['uid'],
1420                         'item'  => $suggest,
1421                         'link'  => DI::baseUrl().'/notifications/intros',
1422                 ]);
1423
1424                 return true;
1425         }
1426
1427         /**
1428          * Processes the relocation elements
1429          *
1430          * @param DOMXPath $xpath      XPath object
1431          * @param DOMNode  $relocation relocation elements
1432          * @param array    $importer   Record of the importer user mixed with contact of the content
1433          * @return boolean
1434          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1435          * @throws \ImagickException
1436          * @todo  Find good type-hints for all parameter
1437          */
1438         private static function processRelocation(DOMXPath $xpath, DOMNode $relocation, array $importer): bool
1439         {
1440                 Logger::notice("Processing relocations");
1441
1442                 /// @TODO Rewrite this to one statement
1443                 $relocate = [];
1444                 $relocate['uid'] = $importer['importer_uid'];
1445                 $relocate['cid'] = $importer['id'];
1446                 $relocate['url'] = $xpath->query('dfrn:url/text()', $relocation)->item(0)->nodeValue;
1447                 $relocate['addr'] = $xpath->query('dfrn:addr/text()', $relocation)->item(0)->nodeValue;
1448                 $relocate['name'] = $xpath->query('dfrn:name/text()', $relocation)->item(0)->nodeValue;
1449                 $relocate['avatar'] = $xpath->query('dfrn:avatar/text()', $relocation)->item(0)->nodeValue;
1450                 $relocate['photo'] = $xpath->query('dfrn:photo/text()', $relocation)->item(0)->nodeValue;
1451                 $relocate['thumb'] = $xpath->query('dfrn:thumb/text()', $relocation)->item(0)->nodeValue;
1452                 $relocate['micro'] = $xpath->query('dfrn:micro/text()', $relocation)->item(0)->nodeValue;
1453                 $relocate['request'] = $xpath->query('dfrn:request/text()', $relocation)->item(0)->nodeValue;
1454                 $relocate['confirm'] = $xpath->query('dfrn:confirm/text()', $relocation)->item(0)->nodeValue;
1455                 $relocate['notify'] = $xpath->query('dfrn:notify/text()', $relocation)->item(0)->nodeValue;
1456                 $relocate['poll'] = $xpath->query('dfrn:poll/text()', $relocation)->item(0)->nodeValue;
1457                 $relocate['sitepubkey'] = $xpath->query('dfrn:sitepubkey/text()', $relocation)->item(0)->nodeValue;
1458
1459                 if (($relocate['avatar'] == '') && ($relocate['photo'] != '')) {
1460                         $relocate['avatar'] = $relocate['photo'];
1461                 }
1462
1463                 if ($relocate['addr'] == '') {
1464                         $relocate['addr'] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", '$3@$2', $relocate['url']);
1465                 }
1466
1467                 // update contact
1468                 $old = Contact::selectFirst(['photo', 'url'], ['id' => $importer['id'], 'uid' => $importer['importer_uid']]);
1469                 if (!DBA::isResult($old)) {
1470                         Logger::warning('Existing contact had not been fetched', ['id' => $importer['id']]);
1471                         return false;
1472                 }
1473
1474                 // Update the contact table. We try to find every entry.
1475                 $fields = [
1476                         'name' => $relocate['name'],
1477                         'avatar' => $relocate['avatar'],
1478                         'url' => $relocate['url'],
1479                         'nurl' => Strings::normaliseLink($relocate['url']),
1480                         'addr' => $relocate['addr'],
1481                         'request' => $relocate['request'],
1482                         'confirm' => $relocate['confirm'],
1483                         'notify' => $relocate['notify'],
1484                         'poll' => $relocate['poll'],
1485                         'site-pubkey' => $relocate['sitepubkey'],
1486                 ];
1487                 $condition = ["(`id` = ?) OR (`nurl` = ?)", $importer['id'], Strings::normaliseLink($old['url'])];
1488
1489                 Contact::update($fields, $condition);
1490
1491                 Contact::updateAvatar($importer['id'], $relocate['avatar'], true);
1492
1493                 Logger::notice('Contacts are updated.');
1494
1495                 /// @TODO
1496                 /// merge with current record, current contents have priority
1497                 /// update record, set url-updated
1498                 /// update profile photos
1499                 /// schedule a scan?
1500                 return true;
1501         }
1502
1503         /**
1504          * Updates an item
1505          *
1506          * @param array $current   the current item record
1507          * @param array $item      the new item record
1508          * @param array $importer  Record of the importer user mixed with contact of the content
1509          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
1510          * @return mixed
1511          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1512          * @todo  set proper type-hints (array?)
1513          */
1514         private static function updateContent(array $current, array $item, array $importer, int $entrytype)
1515         {
1516                 $changed = false;
1517
1518                 if (self::isEditedTimestampNewer($current, $item)) {
1519                         // do not accept (ignore) an earlier edit than one we currently have.
1520                         if (DateTimeFormat::utc($item['edited']) < $current['edited']) {
1521                                 return false;
1522                         }
1523
1524                         $fields = [
1525                                 'title' => $item['title'] ?? '',
1526                                 'body' => $item['body'] ?? '',
1527                                 'changed' => DateTimeFormat::utcNow(),
1528                                 'edited' => DateTimeFormat::utc($item['edited']),
1529                         ];
1530
1531                         $condition = ["`uri` = ? AND `uid` IN (0, ?)", $item['uri'], $importer['importer_uid']];
1532                         Item::update($fields, $condition);
1533
1534                         $changed = true;
1535                 }
1536                 return $changed;
1537         }
1538
1539         /**
1540          * Detects the entry type of the item
1541          *
1542          * @param array $importer Record of the importer user mixed with contact of the content
1543          * @param array $item     the new item record
1544          *
1545          * @return int Is it a toplevel entry, a comment or a relayed comment?
1546          * @throws \Exception
1547          * @todo  set proper type-hints (array?)
1548          */
1549         private static function getEntryType(array $importer, array $item): int
1550         {
1551                 if ($item['thr-parent'] != $item['uri']) {
1552                         // was the top-level post for this action written by somebody on this site?
1553                         // Specifically, the recipient?
1554                         if (Post::exists(['uri' => $item['thr-parent'], 'uid' => $importer['importer_uid'], 'self' => true, 'wall' => true])) {
1555                                 return self::REPLY_RC;
1556                         } else {
1557                                 return self::REPLY;
1558                         }
1559                 } else {
1560                         return self::TOP_LEVEL;
1561                 }
1562         }
1563
1564         /**
1565          * Processes several actions, depending on the verb
1566          *
1567          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
1568          * @param array $importer  Record of the importer user mixed with contact of the content
1569          * @param array $item      the new item record
1570          *
1571          * @return bool Should the processing of the entries be continued?
1572          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1573          */
1574         private static function processVerbs(int $entrytype, array $importer, array &$item)
1575         {
1576                 Logger::info('Process verb ' . $item['verb'] . ' and object-type ' . $item['object-type'] . ' for entrytype ' . $entrytype);
1577
1578                 if (($entrytype == self::TOP_LEVEL) && !empty($importer['id'])) {
1579                         // The filling of the the "contact" variable is done for legcy reasons
1580                         // The functions below are partly used by ostatus.php as well - where we have this variable
1581                         $contact = Contact::selectFirst([], ['id' => $importer['id']]);
1582
1583                         $activity = DI::activity();
1584
1585                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
1586                         // This function once was responsible for DFRN and OStatus.
1587                         if ($activity->match($item['verb'], Activity::FOLLOW)) {
1588                                 Logger::notice("New follower");
1589                                 Contact::addRelationship($importer, $contact, $item);
1590                                 return false;
1591                         }
1592                         if ($activity->match($item['verb'], Activity::UNFOLLOW)) {
1593                                 Logger::notice("Lost follower");
1594                                 Contact::removeFollower($contact);
1595                                 return false;
1596                         }
1597                         if ($activity->match($item['verb'], Activity::REQ_FRIEND)) {
1598                                 Logger::notice("New friend request");
1599                                 Contact::addRelationship($importer, $contact, $item, true);
1600                                 return false;
1601                         }
1602                         if ($activity->match($item['verb'], Activity::UNFRIEND)) {
1603                                 Logger::notice("Lost sharer");
1604                                 Contact::removeSharer($contact);
1605                                 return false;
1606                         }
1607                 } else {
1608                         if (($item['verb'] == Activity::LIKE)
1609                                 || ($item['verb'] == Activity::DISLIKE)
1610                                 || ($item['verb'] == Activity::ATTEND)
1611                                 || ($item['verb'] == Activity::ATTENDNO)
1612                                 || ($item['verb'] == Activity::ATTENDMAYBE)
1613                                 || ($item['verb'] == Activity::ANNOUNCE)
1614                         ) {
1615                                 $item['gravity'] = Item::GRAVITY_ACTIVITY;
1616                                 // only one like or dislike per person
1617                                 // split into two queries for performance issues
1618                                 $condition = [
1619                                         'uid'        => $item['uid'],
1620                                         'author-id'  => $item['author-id'],
1621                                         'gravity'    => Item::GRAVITY_ACTIVITY,
1622                                         'verb'       => $item['verb'],
1623                                         'parent-uri' => $item['thr-parent'],
1624                                 ];
1625                                 if (Post::exists($condition)) {
1626                                         return false;
1627                                 }
1628
1629                                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'gravity' => Item::GRAVITY_ACTIVITY,
1630                                         'verb' => $item['verb'], 'thr-parent' => $item['thr-parent']];
1631                                 if (Post::exists($condition)) {
1632                                         return false;
1633                                 }
1634
1635                                 // The owner of an activity must be the author
1636                                 $item['owner-name'] = $item['author-name'];
1637                                 $item['owner-link'] = $item['author-link'];
1638                                 $item['owner-avatar'] = $item['author-avatar'];
1639                                 $item['owner-id'] = $item['author-id'];
1640                         }
1641
1642                         if (($item['verb'] == Activity::TAG) && ($item['object-type'] == Activity\ObjectType::TAGTERM)) {
1643                                 $xo = XML::parseString($item['object']);
1644                                 $xt = XML::parseString($item['target']);
1645
1646                                 if ($xt->type == Activity\ObjectType::NOTE) {
1647                                         $item_tag = Post::selectFirst(['id', 'uri-id'], ['uri' => $xt->id, 'uid' => $importer['importer_uid']]);
1648                                         if (!DBA::isResult($item_tag)) {
1649                                                 Logger::warning('Post had not been fetched', ['uri' => $xt->id, 'uid' => $importer['importer_uid']]);
1650                                                 return false;
1651                                         }
1652
1653                                         // extract tag, if not duplicate, add to parent item
1654                                         if ($xo->content) {
1655                                                 Tag::store($item_tag['uri-id'], Tag::HASHTAG, $xo->content);
1656                                         }
1657                                 }
1658                         }
1659                 }
1660                 return true;
1661         }
1662
1663         /**
1664          * Processes the link elements
1665          *
1666          * @param object $links link elements
1667          * @param array  $item  the item record
1668          * @return void
1669          * @todo set proper type-hints
1670          */
1671         private static function parseLinks($links, array &$item)
1672         {
1673                 $rel = '';
1674                 $href = '';
1675                 $type = null;
1676                 $length = null;
1677                 $title = null;
1678                 foreach ($links as $link) {
1679                         foreach ($link->attributes as $attributes) {
1680                                 switch ($attributes->name) {
1681                                         case 'href'  : $href   = $attributes->textContent; break;
1682                                         case 'rel'   : $rel    = $attributes->textContent; break;
1683                                         case 'type'  : $type   = $attributes->textContent; break;
1684                                         case 'length': $length = $attributes->textContent; break;
1685                                         case 'title' : $title  = $attributes->textContent; break;
1686                                 }
1687                         }
1688                         if (($rel != '') && ($href != '')) {
1689                                 switch ($rel) {
1690                                         case 'alternate':
1691                                                 $item['plink'] = $href;
1692                                                 break;
1693
1694                                         case 'enclosure':
1695                                                 Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::DOCUMENT,
1696                                                         'url' => $href, 'mimetype' => $type, 'size' => $length, 'description' => $title]);
1697                                                 break;
1698                                 }
1699                         }
1700                 }
1701         }
1702
1703         /**
1704          * Checks if an incoming message is wanted
1705          *
1706          * @param array $item
1707          * @param array $imporer
1708          * @return boolean Is the message wanted?
1709          */
1710         private static function isSolicitedMessage(array $item, array $importer): bool
1711         {
1712                 if (DBA::exists('contact', ["`nurl` = ? AND `uid` != ? AND `rel` IN (?, ?)",
1713                         Strings::normaliseLink($item["author-link"]), 0, Contact::FRIEND, Contact::SHARING])) {
1714                         Logger::debug('Author has got followers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'author' => $item["author-link"]]);
1715                         return true;
1716                 }
1717
1718                 if ($importer['importer_uid'] != 0) {
1719                         Logger::debug('Message is directed to a user - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'importer' => $importer['importer_uid']]);
1720                         return true;
1721                 }
1722
1723                 if ($item['uri'] != $item['thr-parent']) {
1724                         Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1725                         return true;
1726                 }
1727
1728                 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
1729                 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::DFRN)) {
1730                         Logger::debug('Post is accepted because of the relay settings', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'author' => $item["author-link"]]);
1731                         return true;
1732                 } else {
1733                         return false;
1734                 }
1735         }
1736
1737         /**
1738          * Processes the entry elements which contain the items and comments
1739          *
1740          * @param array    $header   Array of the header elements that always stay the same
1741          * @param DOMXPath $xpath    XPath object
1742          * @param DOMNode  $entry    entry elements
1743          * @param array    $importer Record of the importer user mixed with contact of the content
1744          * @param string   $xml      XML
1745          * @param int $protocol Protocol
1746          * @return void
1747          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1748          * @throws \ImagickException
1749          * @todo  Add type-hints
1750          */
1751         private static function processEntry(array $header, DOMXPath $xpath, DOMNode $entry, array $importer, string $xml, int $protocol)
1752         {
1753                 Logger::notice("Processing entries");
1754
1755                 $item = $header;
1756
1757                 $item['source'] = $xml;
1758
1759                 // Get the uri
1760                 $item['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
1761
1762                 $item['edited'] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
1763
1764                 $current = Post::selectFirst(['id', 'uid', 'edited', 'body'],
1765                         ['uri' => $item['uri'], 'uid' => $importer['importer_uid']]
1766                 );
1767                 // Is there an existing item?
1768                 if (DBA::isResult($current) && !self::isEditedTimestampNewer($current, $item)) {
1769                         Logger::info("Item " . $item['uri'] . " (" . $item['edited'] . ") already existed.");
1770                         return;
1771                 }
1772
1773                 // Fetch the owner
1774                 $owner = self::fetchauthor($xpath, $entry, $importer, 'dfrn:owner', true, $xml);
1775
1776                 $owner_unknown = (isset($owner['contact-unknown']) && $owner['contact-unknown']);
1777
1778                 $item['owner-name'] = $owner['name'];
1779                 $item['owner-link'] = $owner['link'];
1780                 $item['owner-avatar'] = $owner['avatar'];
1781                 $item['owner-id'] = Contact::getIdForURL($owner['link'], 0);
1782
1783                 // fetch the author
1784                 $author = self::fetchauthor($xpath, $entry, $importer, 'atom:author', true, $xml);
1785
1786                 $item['author-name'] = $author['name'];
1787                 $item['author-link'] = $author['link'];
1788                 $item['author-avatar'] = $author['avatar'];
1789                 $item['author-id'] = Contact::getIdForURL($author['link'], 0);
1790
1791                 $item['title'] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
1792
1793                 if (!empty($item['title'])) {
1794                         $item['post-type'] = Item::PT_ARTICLE;
1795                 } else {
1796                         $item['post-type'] = Item::PT_NOTE;
1797                 }
1798
1799                 $item['created'] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
1800
1801                 $item['body'] = XML::getFirstNodeValue($xpath, 'dfrn:env/text()', $entry);
1802                 $item['body'] = str_replace([' ',"\t","\r","\n"], ['','','',''], $item['body']);
1803
1804                 $item['body'] = Strings::base64UrlDecode($item['body']);
1805
1806                 $item['body'] = BBCode::limitBodySize($item['body']);
1807
1808                 /// @todo We should check for a repeated post and if we know the repeated author.
1809
1810                 // We don't need the content element since "dfrn:env" is always present
1811                 //$item['body'] = $xpath->query('atom:content/text()', $entry)->item(0)->nodeValue;
1812                 $item['location'] = XML::getFirstNodeValue($xpath, 'dfrn:location/text()', $entry);
1813                 $item['coord'] = XML::getFirstNodeValue($xpath, 'georss:point', $entry);
1814                 $item['private'] = XML::getFirstNodeValue($xpath, 'dfrn:private/text()', $entry);
1815
1816                 $unlisted = XML::getFirstNodeValue($xpath, 'dfrn:unlisted/text()', $entry);
1817                 if (!empty($unlisted) && ($item['private'] != Item::PRIVATE)) {
1818                         $item['private'] = Item::UNLISTED;
1819                 }
1820
1821                 $item['extid'] = XML::getFirstNodeValue($xpath, 'dfrn:extid/text()', $entry);
1822
1823                 if (XML::getFirstNodeValue($xpath, 'dfrn:bookmark/text()', $entry) == 'true') {
1824                         $item['post-type'] = Item::PT_PAGE;
1825                 }
1826
1827                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
1828                 if ($notice_info && ($notice_info->length > 0)) {
1829                         foreach ($notice_info->item(0)->attributes as $attributes) {
1830                                 if ($attributes->name == 'source') {
1831                                         $item['app'] = strip_tags($attributes->textContent);
1832                                 }
1833                         }
1834                 }
1835
1836                 $item['guid'] = XML::getFirstNodeValue($xpath, 'dfrn:diaspora_guid/text()', $entry);
1837
1838                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1839
1840                 $item['body'] = Item::improveSharedDataInBody($item);
1841
1842                 Tag::storeFromBody($item['uri-id'], $item['body']);
1843
1844                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "Item::insert"
1845                 $dsprsig = XML::unescape(XML::getFirstNodeValue($xpath, 'dfrn:diaspora_signature/text()', $entry));
1846                 if ($dsprsig != '') {
1847                         $signature = json_decode(base64_decode($dsprsig));
1848                         // We don't store the old style signatures anymore that also contained the "signature" and "signer"
1849                         if (!empty($signature->signed_text) && empty($signature->signature) && empty($signature->signer)) {
1850                                 $item['diaspora_signed_text'] = $signature->signed_text;
1851                         }
1852                 }
1853
1854                 $item['verb'] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
1855
1856                 if (XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry) != '') {
1857                         $item['object-type'] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
1858                 }
1859
1860                 $object = $xpath->query('activity:object', $entry)->item(0);
1861                 $item['object'] = self::transformActivity($xpath, $object, 'object');
1862
1863                 if (trim($item['object']) != '') {
1864                         $r = XML::parseString($item['object']);
1865                         if (isset($r->type)) {
1866                                 $item['object-type'] = $r->type;
1867                         }
1868                 }
1869
1870                 $target = $xpath->query('activity:target', $entry)->item(0);
1871                 $item['target'] = self::transformActivity($xpath, $target, 'target');
1872
1873                 $categories = $xpath->query('atom:category', $entry);
1874                 if ($categories) {
1875                         foreach ($categories as $category) {
1876                                 $term = '';
1877                                 $scheme = '';
1878                                 foreach ($category->attributes as $attributes) {
1879                                         if ($attributes->name == 'term') {
1880                                                 $term = $attributes->textContent;
1881                                         }
1882
1883                                         if ($attributes->name == 'scheme') {
1884                                                 $scheme = $attributes->textContent;
1885                                         }
1886                                 }
1887
1888                                 if (($term != '') && ($scheme != '')) {
1889                                         $parts = explode(':', $scheme);
1890                                         if ((count($parts) >= 4) && (array_shift($parts) == 'X-DFRN')) {
1891                                                 $termurl = array_pop($parts);
1892                                                 $termurl = array_pop($parts) . ':' . $termurl;
1893                                                 Tag::store($item['uri-id'], Tag::IMPLICIT_MENTION, $term, $termurl);
1894                                         }
1895                                 }
1896                         }
1897                 }
1898
1899                 $links = $xpath->query('atom:link', $entry);
1900                 if ($links) {
1901                         self::parseLinks($links, $item);
1902                 }
1903
1904                 $item['conversation'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
1905
1906                 $conv = $xpath->query('ostatus:conversation', $entry);
1907                 if (is_object($conv->item(0))) {
1908                         foreach ($conv->item(0)->attributes as $attributes) {
1909                                 if ($attributes->name == 'ref') {
1910                                         $item['conversation'] = $attributes->textContent;
1911                                 }
1912                                 if ($attributes->name == 'href') {
1913                                         $item['conversation'] = $attributes->textContent;
1914                                 }
1915                         }
1916                 }
1917
1918                 // Is it a reply or a top level posting?
1919                 $item['thr-parent'] = $item['uri'];
1920
1921                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
1922                 if (is_object($inreplyto->item(0))) {
1923                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1924                                 if ($attributes->name == 'ref') {
1925                                         $item['thr-parent'] = $attributes->textContent;
1926                                 }
1927                         }
1928                 }
1929
1930                 // Check if the message is wanted
1931                 if (!self::isSolicitedMessage($item, $importer)) {
1932                         DBA::delete('item-uri', ['uri' => $item['uri']]);
1933                         return 403;
1934                 }
1935
1936                 // Get the type of the item (Top level post, reply or remote reply)
1937                 $entrytype = self::getEntryType($importer, $item);
1938
1939                 // Now assign the rest of the values that depend on the type of the message
1940                 if (in_array($entrytype, [self::REPLY, self::REPLY_RC])) {
1941                         $item['gravity'] = Item::GRAVITY_COMMENT;
1942
1943                         if (!isset($item['object-type'])) {
1944                                 $item['object-type'] = Activity\ObjectType::COMMENT;
1945                         }
1946
1947                         if ($item['contact-id'] != $owner['contact-id']) {
1948                                 $item['contact-id'] = $owner['contact-id'];
1949                         }
1950
1951                         if (($item['network'] != $owner['network']) && ($owner['network'] != '')) {
1952                                 $item['network'] = $owner['network'];
1953                         }
1954
1955                         if ($item['contact-id'] != $author['contact-id']) {
1956                                 $item['contact-id'] = $author['contact-id'];
1957                         }
1958
1959                         if (($item['network'] != $author['network']) && ($author['network'] != '')) {
1960                                 $item['network'] = $author['network'];
1961                         }
1962                 }
1963
1964                 if ($entrytype == self::REPLY_RC) {
1965                         $item['wall'] = 1;
1966                 } elseif ($entrytype == self::TOP_LEVEL) {
1967                         $item['gravity'] = Item::GRAVITY_PARENT;
1968
1969                         if (!isset($item['object-type'])) {
1970                                 $item['object-type'] = Activity\ObjectType::NOTE;
1971                         }
1972
1973                         // Is it an event?
1974                         if (($item['object-type'] == Activity\ObjectType::EVENT) && !$owner_unknown) {
1975                                 Logger::info("Item " . $item['uri'] . " seems to contain an event.");
1976                                 $ev = Event::fromBBCode($item['body']);
1977                                 if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1978                                         Logger::info("Event in item " . $item['uri'] . " was found.");
1979                                         $ev['cid']       = $importer['id'];
1980                                         $ev['uid']       = $importer['importer_uid'];
1981                                         $ev['uri']       = $item['uri'];
1982                                         $ev['edited']    = $item['edited'];
1983                                         $ev['private']   = $item['private'];
1984                                         $ev['guid']      = $item['guid'];
1985                                         $ev['plink']     = $item['plink'];
1986                                         $ev['network']   = $item['network'];
1987                                         $ev['protocol']  = $item['protocol'];
1988                                         $ev['direction'] = $item['direction'];
1989                                         $ev['source']    = $item['source'];
1990
1991                                         $condition = ['uri' => $item['uri'], 'uid' => $importer['importer_uid']];
1992                                         $event = DBA::selectFirst('event', ['id'], $condition);
1993                                         if (DBA::isResult($event)) {
1994                                                 $ev['id'] = $event['id'];
1995                                         }
1996
1997                                         $event_id = Event::store($ev);
1998                                         Logger::info('Event was stored', ['id' => $event_id]);
1999
2000                                         $item = Event::getItemArrayForImportedId($event_id, $item);
2001                                 }
2002                         }
2003                 }
2004
2005                 if (!self::processVerbs($entrytype, $importer, $item)) {
2006                         Logger::info("Exiting because 'processVerbs' told us so");
2007                         return;
2008                 }
2009
2010                 // This check is done here to be able to receive connection requests in "processVerbs"
2011                 if (($entrytype == self::TOP_LEVEL) && $owner_unknown) {
2012                         Logger::info("Item won't be stored because user " . $importer['importer_uid'] . " doesn't follow " . $item['owner-link'] . ".");
2013                         return;
2014                 }
2015
2016
2017                 // Update content if 'updated' changes
2018                 if (DBA::isResult($current)) {
2019                         if (self::updateContent($current, $item, $importer, $entrytype)) {
2020                                 Logger::info("Item " . $item['uri'] . " was updated.");
2021                         } else {
2022                                 Logger::info("Item " . $item['uri'] . " already existed.");
2023                         }
2024                         return;
2025                 }
2026
2027                 if (in_array($entrytype, [self::REPLY, self::REPLY_RC])) {
2028                         if (($item['uid'] != 0) && !Post::exists(['uid' => $item['uid'], 'uri' => $item['thr-parent']])) {
2029                                 if (DI::pConfig()->get($item['uid'], 'system', 'accept_only_sharer') == Item::COMPLETION_NONE) {
2030                                         Logger::info('Completion is set to "none", so we stop here.', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2031                                         return;
2032                                 }
2033                                 if (!Contact::isSharing($item['owner-id'], $item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
2034                                         Logger::info('Contact is not sharing with the user', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2035                                         return;
2036                                 }
2037                                 if (($item['gravity'] == Item::GRAVITY_ACTIVITY) && DI::pConfig()->get($item['uid'], 'system', 'accept_only_sharer') == Item::COMPLETION_COMMENT) {
2038                                         Logger::info('Completion is set to "comment", but this is an activity. so we stop here.', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2039                                         return;
2040                                 }
2041                                 Logger::debug('Post is accepted.', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2042                         } else {
2043                                 Logger::debug('Thread parent exists.', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2044                         }
2045
2046                         // Will be overwritten for sharing accounts in Item::insert
2047                         if (empty($item['post-reason']) && ($entrytype == self::REPLY)) {
2048                                 $item['post-reason'] = Item::PR_COMMENT;
2049                         }
2050
2051                         $posted_id = Item::insert($item);
2052                         if ($posted_id) {
2053                                 Logger::info("Reply from contact " . $item['contact-id'] . " was stored with id " . $posted_id);
2054
2055                                 if ($item['uid'] == 0) {
2056                                         Item::distribute($posted_id);
2057                                 }
2058
2059                                 return true;
2060                         }
2061                 } else { // $entrytype == self::TOP_LEVEL
2062                         if (($item['uid'] != 0) && !Contact::isSharing($item['owner-id'], $item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
2063                                 Logger::info('Contact is not sharing with the user', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2064                                 return;
2065                         }
2066
2067                         // This is my contact on another system, but it's really me.
2068                         // Turn this into a wall post.
2069                         $notify = Item::isRemoteSelf($importer, $item);
2070
2071                         $posted_id = Item::insert($item, $notify);
2072
2073                         if ($notify) {
2074                                 $posted_id = $notify;
2075                         }
2076
2077                         Logger::info("Item was stored with id " . $posted_id);
2078
2079                         if ($item['uid'] == 0) {
2080                                 Item::distribute($posted_id);
2081                         }
2082                 }
2083         }
2084
2085         /**
2086          * Deletes items
2087          *
2088          * @param DOMXPath $xpath XPath object
2089          * @param DOMNode  $deletion deletion elements
2090          * @param array   $importer Record of the importer user mixed with contact of the content
2091          * @return void
2092          * @throws \Exception
2093          */
2094         private static function processDeletion(DOMXPath $xpath, DOMNode $deletion, array $importer)
2095         {
2096                 Logger::notice("Processing deletions");
2097                 $uri = null;
2098
2099                 foreach ($deletion->attributes as $attributes) {
2100                         if ($attributes->name == 'ref') {
2101                                 $uri = $attributes->textContent;
2102                         }
2103                 }
2104
2105                 if (!$uri || !$importer['id']) {
2106                         return false;
2107                 }
2108
2109                 $condition = ['uri' => $uri, 'uid' => $importer['importer_uid']];
2110                 $item = Post::selectFirst(['id', 'parent', 'contact-id', 'uri-id', 'deleted', 'gravity'], $condition);
2111                 if (!DBA::isResult($item)) {
2112                         Logger::info('Item with URI ' . $uri . ' for user ' . $importer['importer_uid'] . ' was not found.');
2113                         return;
2114                 }
2115
2116                 if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $importer['importer_uid'], 'type' => Post\Category::FILE])) {
2117                         Logger::notice('Item is filed. It will not be deleted.', ['uri' => $uri, 'uri-id' => $item['uri_id'], 'uid' => $importer['importer_uid']]);
2118                         return;
2119                 }
2120
2121                 // When it is a starting post it has to belong to the person that wants to delete it
2122                 if (($item['gravity'] == Item::GRAVITY_PARENT) && ($item['contact-id'] != $importer['id'])) {
2123                         Logger::info('Item with URI ' . $uri . ' do not belong to contact ' . $importer['id'] . ' - ignoring deletion.');
2124                         return;
2125                 }
2126
2127                 // Comments can be deleted by the thread owner or comment owner
2128                 if (($item['gravity'] != Item::GRAVITY_PARENT) && ($item['contact-id'] != $importer['id'])) {
2129                         $condition = ['id' => $item['parent'], 'contact-id' => $importer['id']];
2130                         if (!Post::exists($condition)) {
2131                                 Logger::info('Item with URI ' . $uri . ' was not found or must not be deleted by contact ' . $importer['id'] . ' - ignoring deletion.');
2132                                 return;
2133                         }
2134                 }
2135
2136                 if ($item['deleted']) {
2137                         return;
2138                 }
2139
2140                 Logger::info('deleting item '.$item['id'].' uri='.$uri);
2141
2142                 Item::markForDeletion(['id' => $item['id']]);
2143         }
2144
2145         /**
2146          * Imports a DFRN message
2147          *
2148          * @param string $xml       The DFRN message
2149          * @param array  $importer  Record of the importer user mixed with contact of the content
2150          * @param int    $protocol  Transport protocol
2151          * @param int    $direction Is the message pushed or pulled?
2152          * @return integer Import status
2153          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2154          * @throws \ImagickException
2155          */
2156         public static function import(string $xml, array $importer, int $protocol, int $direction): int
2157         {
2158                 if ($xml == '') {
2159                         return 400;
2160                 }
2161
2162                 $doc = new DOMDocument();
2163                 @$doc->loadXML($xml);
2164
2165                 $xpath = new DOMXPath($doc);
2166                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
2167                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
2168                 $xpath->registerNamespace('at', ActivityNamespace::TOMB);
2169                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
2170                 $xpath->registerNamespace('dfrn', ActivityNamespace::DFRN);
2171                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
2172                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
2173                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
2174                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
2175                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
2176
2177                 $header = [];
2178                 $header['uid'] = $importer['importer_uid'];
2179                 $header['network'] = Protocol::DFRN;
2180                 $header['protocol'] = $protocol;
2181                 $header['wall'] = 0;
2182                 $header['origin'] = 0;
2183                 $header['contact-id'] = $importer['id'];
2184
2185                 $header = Diaspora::setDirection($header, $direction);
2186
2187                 if ($direction === Conversation::RELAY) {
2188                         $header['post-reason'] = Item::PR_RELAY;
2189                 }
2190
2191                 // Update the contact table if the data has changed
2192
2193                 // The "atom:author" is only present in feeds
2194                 if ($xpath->query('/atom:feed/atom:author')->length > 0) {
2195                         self::fetchauthor($xpath, $doc->firstChild, $importer, 'atom:author', false, $xml);
2196                 }
2197
2198                 // Only the "dfrn:owner" in the head section contains all data
2199                 if ($xpath->query('/atom:feed/dfrn:owner')->length > 0) {
2200                         self::fetchauthor($xpath, $doc->firstChild, $importer, 'dfrn:owner', false, $xml);
2201                 }
2202
2203                 Logger::info("Import DFRN message for user " . $importer['importer_uid'] . " from contact " . $importer['id']);
2204
2205                 if (!empty($importer['gsid']) && ($protocol == Conversation::PARCEL_DIASPORA_DFRN)) {
2206                         GServer::setProtocol($importer['gsid'], Post\DeliveryData::DFRN);
2207                 }
2208
2209                 // is it a public forum? Private forums aren't exposed with this method
2210                 $forum = intval(XML::getFirstNodeValue($xpath, '/atom:feed/dfrn:community/text()'));
2211
2212                 // The account type is new since 3.5.1
2213                 if ($xpath->query('/atom:feed/dfrn:account_type')->length > 0) {
2214                         // Hint: We are using separate update calls for uid=0 and uid!=0 since a combined call is bad for the database performance
2215
2216                         $accounttype = intval(XML::getFirstNodeValue($xpath, '/atom:feed/dfrn:account_type/text()'));
2217
2218                         if ($accounttype != $importer['contact-type']) {
2219                                 Contact::update(['contact-type' => $accounttype], ['id' => $importer['id']]);
2220
2221                                 // Updating the public contact as well
2222                                 Contact::update(['contact-type' => $accounttype], ['uid' => 0, 'nurl' => $importer['nurl']]);
2223                         }
2224                         // A forum contact can either have set "forum" or "prv" - but not both
2225                         if ($accounttype == User::ACCOUNT_TYPE_COMMUNITY) {
2226                                 // It's a forum, so either set the public or private forum flag
2227                                 $condition = ['(`forum` != ? OR `prv` != ?) AND `id` = ?', $forum, !$forum, $importer['id']];
2228                                 Contact::update(['forum' => $forum, 'prv' => !$forum], $condition);
2229
2230                                 // Updating the public contact as well
2231                                 $condition = ['(`forum` != ? OR `prv` != ?) AND `uid` = 0 AND `nurl` = ?', $forum, !$forum, $importer['nurl']];
2232                                 Contact::update(['forum' => $forum, 'prv' => !$forum], $condition);
2233                         } else {
2234                                 // It's not a forum, so remove the flags
2235                                 $condition = ['(`forum` OR `prv`) AND `id` = ?', $importer['id']];
2236                                 Contact::update(['forum' => false, 'prv' => false], $condition);
2237
2238                                 // Updating the public contact as well
2239                                 $condition = ['(`forum` OR `prv`) AND `uid` = 0 AND `nurl` = ?', $importer['nurl']];
2240                                 Contact::update(['forum' => false, 'prv' => false], $condition);
2241                         }
2242                 } elseif ($forum != $importer['forum']) { // Deprecated since 3.5.1
2243                         $condition = ['`forum` != ? AND `id` = ?', $forum, $importer['id']];
2244                         Contact::update(['forum' => $forum], $condition);
2245
2246                         // Updating the public contact as well
2247                         $condition = ['`forum` != ? AND `uid` = 0 AND `nurl` = ?', $forum, $importer['nurl']];
2248                         Contact::update(['forum' => $forum], $condition);
2249                 }
2250
2251
2252                 // We are processing relocations even if we are ignoring a contact
2253                 $relocations = $xpath->query('/atom:feed/dfrn:relocate');
2254                 foreach ($relocations as $relocation) {
2255                         self::processRelocation($xpath, $relocation, $importer);
2256                 }
2257
2258                 if (($importer['uid'] != 0) && !$importer['readonly']) {
2259                         $mails = $xpath->query('/atom:feed/dfrn:mail');
2260                         foreach ($mails as $mail) {
2261                                 self::processMail($xpath, $mail, $importer);
2262                         }
2263
2264                         $suggestions = $xpath->query('/atom:feed/dfrn:suggest');
2265                         foreach ($suggestions as $suggestion) {
2266                                 self::processSuggestion($xpath, $suggestion, $importer);
2267                         }
2268                 }
2269
2270                 $deletions = $xpath->query('/atom:feed/at:deleted-entry');
2271                 if (!empty($deletions)) {
2272                         foreach ($deletions as $deletion) {
2273                                 self::processDeletion($xpath, $deletion, $importer);
2274                         }
2275                         if (count($deletions) > 0) {
2276                                 Logger::notice(count($deletions) . ' deletions had been processed');
2277                                 return 200;
2278                         }
2279                 }
2280
2281                 $entries = $xpath->query('/atom:feed/atom:entry');
2282                 foreach ($entries as $entry) {
2283                         self::processEntry($header, $xpath, $entry, $importer, $xml, $protocol);
2284                 }
2285
2286                 Logger::info("Import done for user " . $importer['importer_uid'] . " from contact " . $importer['id']);
2287                 return 200;
2288         }
2289
2290         /**
2291          * Returns the activity verb
2292          *
2293          * @param array $item Item array
2294          *
2295          * @return string activity verb
2296          */
2297         private static function constructVerb(array $item): string
2298         {
2299                 if ($item['verb']) {
2300                         return $item['verb'];
2301                 }
2302                 return Activity::POST;
2303         }
2304
2305         /**
2306          * This function returns true if $update has an edited timestamp newer
2307          * than $existing, i.e. $update contains new data which should override
2308          * what's already there.  If there is no timestamp yet, the update is
2309          * assumed to be newer.  If the update has no timestamp, the existing
2310          * item is assumed to be up-to-date.  If the timestamps are equal it
2311          * assumes the update has been seen before and should be ignored.
2312          *
2313          * @param array $existing
2314          * @param array $update
2315          * @return bool
2316          * @throws \Exception
2317          */
2318         private static function isEditedTimestampNewer(array $existing, array $update): bool
2319         {
2320                 if (empty($existing['edited'])) {
2321                         return true;
2322                 }
2323                 if (empty($update['edited'])) {
2324                         return false;
2325                 }
2326
2327                 $existing_edited = DateTimeFormat::utc($existing['edited']);
2328                 $update_edited = DateTimeFormat::utc($update['edited']);
2329
2330                 return (strcmp($existing_edited, $update_edited) < 0);
2331         }
2332
2333         /**
2334          * Checks if the given contact url does support DFRN
2335          *
2336          * @param string  $url    profile url
2337          * @return boolean
2338          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2339          * @throws \ImagickException
2340          */
2341         public static function isSupportedByContactUrl(string $url): bool
2342         {
2343                 $probe = Probe::uri($url, Protocol::DFRN);
2344                 return $probe['network'] == Protocol::DFRN;
2345         }
2346 }