src/Protocol/DFRN.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Protocol;
  23
  24 use DOMDocument;
  25 use DOMElement;
  26 use DOMNode;
  27 use DOMXPath;
  28 use Friendica\App;
  29 use Friendica\Content\Text\BBCode;
  30 use Friendica\Core\Logger;
  31 use Friendica\Core\Protocol;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Model\Contact;
  35 use Friendica\Model\Conversation;
  36 use Friendica\Model\Event;
  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\HTTPException;
  48 use Friendica\Network\Probe;
  49 use Friendica\Util\Crypto;
  50 use Friendica\Util\DateTimeFormat;
  51 use Friendica\Util\Images;
  52 use Friendica\Util\Proxy;
  53 use Friendica\Util\Strings;
  54 use Friendica\Util\XML;
  55 use GuzzleHttp\Psr7\Uri;
  56
  57 /**
  58  * This class contain functions to create and send DFRN XML files
  59  */
  60 class DFRN
  61 {
  62
  63         const TOP_LEVEL = 0; // Top level posting
  64         const REPLY     = 1; // Regular reply that is stored locally
  65         const REPLY_RC  = 2; // Reply that will be relayed
  66
  67         /**
  68          * Generates an array of contact and user for DFRN imports
  69          *
  70          * This array contains not only the receiver but also the sender of the message.
  71          *
  72          * @param integer $cid Contact id
  73          * @param integer $uid User id
  74          *
  75          * @return array importer
  76          * @throws \Exception
  77          */
  78         public static function getImporter(int $cid, int $uid = 0): array
  79         {
  80                 $condition = ['id' => $cid, 'blocked' => false, 'pending' => false];
  81                 $contact = DBA::selectFirst('contact', [], $condition);
  82                 if (!DBA::isResult($contact)) {
  83                         return [];
  84                 }
  85
  86                 $contact['cpubkey'] = $contact['pubkey'];
  87                 $contact['cprvkey'] = $contact['prvkey'];
  88                 $contact['senderName'] = $contact['name'];
  89
  90                 if ($uid != 0) {
  91                         $condition = ['uid' => $uid, 'account_expired' => false, 'account_removed' => false];
  92                         $user = DBA::selectFirst('user', [], $condition);
  93                         if (!DBA::isResult($user)) {
  94                                 return [];
  95                         }
  96
  97                         $user['importer_uid'] = $user['uid'];
  98                         $user['uprvkey'] = $user['prvkey'];
  99                 } else {
 100                         $user = ['importer_uid' => 0, 'uprvkey' => '', 'timezone' => 'UTC',
 101                                 'nickname' => '', 'sprvkey' => '', 'spubkey' => '',
 102                                 'page-flags' => 0, 'account-type' => 0, 'prvnets' => 0];
 103                 }
 104
 105                 return array_merge($contact, $user);
 106         }
 107
 108         /**
 109          * Generates the atom entries for delivery.php
 110          *
 111          * This function is used whenever content is transmitted via DFRN.
 112          *
 113          * @param array $items Item elements
 114          * @param array $owner Owner record
 115          *
 116          * @return string DFRN entries
 117          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 118          * @throws \ImagickException
 119          * @todo  Find proper type-hints
 120          */
 121         public static function entries(array $items, array $owner): string
 122         {
 123                 $doc = new DOMDocument('1.0', 'utf-8');
 124                 $doc->formatOutput = true;
 125
 126                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 127
 128                 if (! count($items)) {
 129                         return trim($doc->saveXML());
 130                 }
 131
 132                 foreach ($items as $item) {
 133                         // These values aren't sent when sending from the queue.
 134                         /// @todo Check if we can set these values from the queue or if they are needed at all.
 135                         $item['entry:comment-allow'] = ($item['entry:comment-allow'] ?? '') ?: true;
 136                         $item['entry:cid'] = $item['entry:cid'] ?? 0;
 137
 138                         $entry = self::entry($doc, 'text', $item, $owner, $item['entry:comment-allow'], $item['entry:cid']);
 139                         if (isset($entry)) {
 140                                 $root->appendChild($entry);
 141                         }
 142                 }
 143
 144                 return trim($doc->saveXML());
 145         }
 146
 147         /**
 148          * Generate an atom entry for a given uri id and user
 149          *
 150          * @param int     $uri_id       The uri id
 151          * @param int     $uid          The user id
 152          * @param boolean $conversation Show the conversation. If false show the single post.
 153          *
 154          * @return string DFRN feed entry
 155          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 156          * @throws \ImagickException
 157          */
 158         public static function itemFeed(int $uri_id, int $uid, bool $conversation = false): string
 159         {
 160                 if ($conversation) {
 161                         $condition = ['parent-uri-id' => $uri_id];
 162                 } else {
 163                         $condition = ['uri-id' => $uri_id];
 164                 }
 165
 166                 $condition['uid'] = $uid;
 167
 168                 $items = Post::selectToArray(Item::DELIVER_FIELDLIST, $condition);
 169                 if (!DBA::isResult($items)) {
 170                         return '';
 171                 }
 172
 173                 $item = $items[0];
 174
 175                 if ($item['uid'] != 0) {
 176                         $owner = User::getOwnerDataById($item['uid']);
 177                         if (!$owner) {
 178                                 return '';
 179                         }
 180                 } else {
 181                         $owner = ['uid' => 0, 'nick' => 'feed-item'];
 182                 }
 183
 184                 $doc = new DOMDocument('1.0', 'utf-8');
 185                 $doc->formatOutput = true;
 186                 $type = 'html';
 187
 188                 if ($conversation) {
 189                         $root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
 190                         $doc->appendChild($root);
 191
 192                         $root->setAttribute('xmlns:thr', ActivityNamespace::THREAD);
 193                         $root->setAttribute('xmlns:at', ActivityNamespace::TOMB);
 194                         $root->setAttribute('xmlns:media', ActivityNamespace::MEDIA);
 195                         $root->setAttribute('xmlns:dfrn', ActivityNamespace::DFRN);
 196                         $root->setAttribute('xmlns:activity', ActivityNamespace::ACTIVITY);
 197                         $root->setAttribute('xmlns:georss', ActivityNamespace::GEORSS);
 198                         $root->setAttribute('xmlns:poco', ActivityNamespace::POCO);
 199                         $root->setAttribute('xmlns:ostatus', ActivityNamespace::OSTATUS);
 200                         $root->setAttribute('xmlns:statusnet', ActivityNamespace::STATUSNET);
 201
 202                         foreach ($items as $item) {
 203                                 $entry = self::entry($doc, $type, $item, $owner, true, 0);
 204                                 if (isset($entry)) {
 205                                         $root->appendChild($entry);
 206                                 }
 207                         }
 208                 } else {
 209                         self::entry($doc, $type, $item, $owner, true, 0, true);
 210                 }
 211
 212                 $atom = trim($doc->saveXML());
 213                 return $atom;
 214         }
 215
 216         /**
 217          * Create XML text for DFRN mails
 218          *
 219          * @param array $mail  Mail record
 220          * @param array $owner Owner record
 221          *
 222          * @return string DFRN mail
 223          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 224          * @todo  Find proper type-hints
 225          */
 226         public static function mail(array $mail, array $owner): string
 227         {
 228                 $doc = new DOMDocument('1.0', 'utf-8');
 229                 $doc->formatOutput = true;
 230
 231                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 232
 233                 $mailElement = $doc->createElement('dfrn:mail');
 234                 $senderElement = $doc->createElement('dfrn:sender');
 235
 236                 XML::addElement($doc, $senderElement, 'dfrn:name', $owner['name']);
 237                 XML::addElement($doc, $senderElement, 'dfrn:uri', $owner['url']);
 238                 XML::addElement($doc, $senderElement, 'dfrn:avatar', $owner['thumb']);
 239
 240                 $mailElement->appendChild($senderElement);
 241
 242                 XML::addElement($doc, $mailElement, 'dfrn:id', $mail['uri']);
 243                 XML::addElement($doc, $mailElement, 'dfrn:in-reply-to', $mail['parent-uri']);
 244                 XML::addElement($doc, $mailElement, 'dfrn:sentdate', DateTimeFormat::utc($mail['created'] . '+00:00', DateTimeFormat::ATOM));
 245                 XML::addElement($doc, $mailElement, 'dfrn:subject', $mail['title']);
 246                 XML::addElement($doc, $mailElement, 'dfrn:content', $mail['body']);
 247
 248                 $root->appendChild($mailElement);
 249
 250                 return trim($doc->saveXML());
 251         }
 252
 253         /**
 254          * Create XML text for DFRN friend suggestions
 255          *
 256          * @param array $item  suggestion elements
 257          * @param array $owner Owner record
 258          *
 259          * @return string DFRN suggestions
 260          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 261          * @todo  Find proper type-hints
 262          */
 263         public static function fsuggest(array $item, array $owner): string
 264         {
 265                 $doc = new DOMDocument('1.0', 'utf-8');
 266                 $doc->formatOutput = true;
 267
 268                 $root = self::addHeader($doc, $owner, 'dfrn:owner', '', false);
 269
 270                 $suggest = $doc->createElement('dfrn:suggest');
 271
 272                 XML::addElement($doc, $suggest, 'dfrn:url', $item['url']);
 273                 XML::addElement($doc, $suggest, 'dfrn:name', $item['name']);
 274                 XML::addElement($doc, $suggest, 'dfrn:photo', $item['photo']);
 275                 XML::addElement($doc, $suggest, 'dfrn:request', $item['request']);
 276                 XML::addElement($doc, $suggest, 'dfrn:note', $item['note']);
 277
 278                 $root->appendChild($suggest);
 279
 280                 return trim($doc->saveXML());
 281         }
 282
 283         /**
 284          * Create XML text for DFRN relocations
 285          *
 286          * @param array $owner Owner record
 287          * @param int   $uid   User ID
 288          *
 289          * @return string DFRN relocations
 290          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 291          * @todo  Find proper type-hints
 292          */
 293         public static function relocate(array $owner, int $uid): string
 294         {
 295
 296                 /* get site pubkey. this could be a new installation with no site keys*/
 297                 $pubkey = DI::config()->get('system', 'site_pubkey');
 298                 if (! $pubkey) {
 299                         $res = Crypto::newKeypair(1024);
 300                         DI::config()->set('system', 'site_prvkey', $res['prvkey']);
 301                         DI::config()->set('system', 'site_pubkey', $res['pubkey']);
 302                 }
 303
 304                 $profilephotos = Photo::selectToArray(['resource-id', 'scale', 'type'], ['profile' => true, 'uid' => $uid], ['order' => ['scale']]);
 305
 306                 $photos = [];
 307                 $ext = Images::supportedTypes();
 308
 309                 foreach ($profilephotos as $p) {
 310                         $photos[$p['scale']] = DI::baseUrl() . '/photo/' . $p['resource-id'] . '-' . $p['scale'] . '.' . $ext[$p['type']];
 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                 $attributes = ['uri' => 'https://friendi.ca', 'version' => App::VERSION . '-' . DB_UPDATE_VERSION];
 373                 XML::addElement($doc, $root, 'generator', App::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]) 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'], DI::contentItem()->addSharedPost($item));
 777
 778                 if ($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                         try {
 984                                 $pubkey = DI::dsprContact()->getByAddr(WebFingerUri::fromString($contact['addr']))->pubKey;
 985                         } catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
 986                                 Logger::notice('Unable to find contact details for ' . $contact['id'] . ' - ' . $contact['addr']);
 987                                 return -22;
 988                         }
 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 = $postResult->getReturnCode();
1017                 if (!empty($contact['gsid']) && ($postResult->isTimeout() || empty($curl_stat))) {
1018                         GServer::setFailureById($contact['gsid']);
1019                 }
1020
1021                 if (empty($curl_stat) || empty($xml)) {
1022                         Logger::notice('Empty answer from ' . $contact['id'] . ' - ' . $dest_url);
1023                         return -9; // timed out
1024                 }
1025
1026                 if (($curl_stat == 503) && $postResult->inHeader('retry-after')) {
1027                         return -10;
1028                 }
1029
1030                 if (strpos($xml, '<?xml') === false) {
1031                         Logger::notice('No valid XML returned from ' . $contact['id'] . ' - ' . $dest_url);
1032                         Logger::debug('Returned XML: ' . $xml);
1033                         return 3;
1034                 }
1035
1036                 $res = XML::parseString($xml);
1037
1038                 if (empty($res->status)) {
1039                         return -23;
1040                 }
1041
1042                 if (!empty($contact['gsid'])) {
1043                         GServer::setReachableById($contact['gsid']);
1044                 }
1045
1046                 if (!empty($res->message)) {
1047                         Logger::info('Transmit to ' . $dest_url . ' returned status '.$res->status.' - '.$res->message);
1048                 }
1049
1050                 return intval($res->status);
1051         }
1052
1053         /**
1054          * Fetch the author data from head or entry items
1055          *
1056          * @param \DOMXPath $xpath     XPath object
1057          * @param \DOMNode  $context   In which context should the data be searched
1058          * @param array     $importer  Record of the importer user mixed with contact of the content
1059          * @param string    $element   Element name from which the data is fetched
1060          * @param bool      $onlyfetch Should the data only be fetched or should it update the contact record as well
1061          * @param string    $xml       optional, default empty
1062          *
1063          * @return array Relevant data of the author
1064          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1065          * @throws \ImagickException
1066          * @todo  Find good type-hints for all parameter
1067          */
1068         private static function fetchauthor(\DOMXPath $xpath, \DOMNode $context, array $importer, string $element, bool $onlyfetch, string $xml = ''): array
1069         {
1070                 $author = [];
1071                 $author["name"] = XML::getFirstNodeValue($xpath, $element."/atom:name/text()", $context);
1072                 $author["link"] = XML::getFirstNodeValue($xpath, $element."/atom:uri/text()", $context);
1073
1074                 $fields = ['id', 'uid', 'url', 'network', 'avatar-date', 'avatar', 'name-date', 'uri-date', 'addr',
1075                         'name', 'nick', 'about', 'location', 'keywords', 'xmpp', 'bdyear', 'bd', 'hidden', 'contact-type'];
1076                 $condition = ["`uid` = ? AND `nurl` = ? AND NOT `pending` AND NOT `blocked`",
1077                         $importer["importer_uid"], Strings::normaliseLink($author["link"])];
1078
1079                 if ($importer['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1080                         $condition = DBA::mergeConditions($condition, ['rel' => [Contact::SHARING, Contact::FRIEND]]);
1081                 }
1082
1083                 $contact_old = DBA::selectFirst('contact', $fields, $condition);
1084
1085                 if (DBA::isResult($contact_old)) {
1086                         $author["contact-id"] = $contact_old["id"];
1087                         $author["network"] = $contact_old["network"];
1088                 } else {
1089                         Logger::info('Contact not found', ['condition' => $condition]);
1090
1091                         $author["contact-unknown"] = true;
1092                         $contact = Contact::getByURL($author["link"], null, ["id", "network"]);
1093                         $author["contact-id"] = $contact["id"] ?? $importer["id"];
1094                         $author["network"] = $contact["network"] ?? $importer["network"];
1095                         $onlyfetch = true;
1096                 }
1097
1098                 // Until now we aren't serving different sizes - but maybe later
1099                 $avatarlist = [];
1100                 /// @todo check if "avatar" or "photo" would be the best field in the specification
1101                 $avatars = $xpath->query($element . "/atom:link[@rel='avatar']", $context);
1102                 foreach ($avatars as $avatar) {
1103                         $href = "";
1104                         $width = 0;
1105                         foreach ($avatar->attributes as $attributes) {
1106                                 /// @TODO Rewrite these similar if() to one switch
1107                                 if ($attributes->name == "href") {
1108                                         $href = $attributes->textContent;
1109                                 }
1110                                 if ($attributes->name == "width") {
1111                                         $width = $attributes->textContent;
1112                                 }
1113                                 if ($attributes->name == "updated") {
1114                                         $author["avatar-date"] = $attributes->textContent;
1115                                 }
1116                         }
1117                         if (($width > 0) && ($href != "")) {
1118                                 $avatarlist[$width] = $href;
1119                         }
1120                 }
1121
1122                 if (count($avatarlist) > 0) {
1123                         krsort($avatarlist);
1124                         $author["avatar"] = current($avatarlist);
1125                 }
1126
1127                 if (empty($author['avatar']) && !empty($author['link'])) {
1128                         $cid = Contact::getIdForURL($author['link'], 0);
1129                         if (!empty($cid)) {
1130                                 $contact = DBA::selectFirst('contact', ['avatar'], ['id' => $cid]);
1131                                 if (DBA::isResult($contact)) {
1132                                         $author['avatar'] = $contact['avatar'];
1133                                 }
1134                         }
1135                 }
1136
1137                 if (empty($author['avatar'])) {
1138                         Logger::notice('Empty author: ' . $xml);
1139                         $author['avatar'] = '';
1140                 }
1141
1142                 if (DBA::isResult($contact_old) && !$onlyfetch) {
1143                         Logger::info("Check if contact details for contact " . $contact_old["id"] . " (" . $contact_old["nick"] . ") have to be updated.");
1144
1145                         $poco = ["url" => $contact_old["url"], "network" => $contact_old["network"]];
1146
1147                         // When was the last change to name or uri?
1148                         $name_element = $xpath->query($element . "/atom:name", $context)->item(0);
1149                         foreach ($name_element->attributes as $attributes) {
1150                                 if ($attributes->name == "updated") {
1151                                         $poco["name-date"] = $attributes->textContent;
1152                                 }
1153                         }
1154
1155                         $link_element = $xpath->query($element . "/atom:link", $context)->item(0);
1156                         foreach ($link_element->attributes as $attributes) {
1157                                 if ($attributes->name == "updated") {
1158                                         $poco["uri-date"] = $attributes->textContent;
1159                                 }
1160                         }
1161
1162                         // Update contact data
1163                         $value = XML::getFirstNodeValue($xpath, $element . "/dfrn:handle/text()", $context);
1164                         if ($value != "") {
1165                                 $poco["addr"] = $value;
1166                         }
1167
1168                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:displayName/text()", $context);
1169                         if ($value != "") {
1170                                 $poco["name"] = $value;
1171                         }
1172
1173                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:preferredUsername/text()", $context);
1174                         if ($value != "") {
1175                                 $poco["nick"] = $value;
1176                         }
1177
1178                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:note/text()", $context);
1179                         if ($value != "") {
1180                                 $poco["about"] = $value;
1181                         }
1182
1183                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:address/poco:formatted/text()", $context);
1184                         if ($value != "") {
1185                                 $poco["location"] = $value;
1186                         }
1187
1188                         /// @todo Only search for elements with "poco:type" = "xmpp"
1189                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:ims/poco:value/text()", $context);
1190                         if ($value != "") {
1191                                 $poco["xmpp"] = $value;
1192                         }
1193
1194                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1195                         /// - poco:utcOffset
1196                         /// - poco:urls
1197                         /// - poco:locality
1198                         /// - poco:region
1199                         /// - poco:country
1200
1201                         // If the "hide" element is present then the profile isn't searchable.
1202                         $hide = intval(XML::getFirstNodeValue($xpath, $element . "/dfrn:hide/text()", $context) == "true");
1203
1204                         Logger::info("Hidden status for contact " . $contact_old["url"] . ": " . $hide);
1205
1206                         // If the contact isn't searchable then set the contact to "hidden".
1207                         // Problem: This can be manually overridden by the user.
1208                         if ($hide) {
1209                                 $contact_old["hidden"] = true;
1210                         }
1211
1212                         // Save the keywords into the contact table
1213                         $tags = [];
1214                         $tagelements = $xpath->evaluate($element . "/poco:tags/text()", $context);
1215                         foreach ($tagelements as $tag) {
1216                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1217                         }
1218
1219                         if (count($tags)) {
1220                                 $poco["keywords"] = implode(", ", $tags);
1221                         }
1222
1223                         // "dfrn:birthday" contains the birthday converted to UTC
1224                         $birthday = XML::getFirstNodeValue($xpath, $element . "/dfrn:birthday/text()", $context);
1225                         try {
1226                                 $birthday_date = new \DateTime($birthday);
1227                                 if ($birthday_date > new \DateTime()) {
1228                                         $poco["bdyear"] = $birthday_date->format("Y");
1229                                 }
1230                         } catch (\Exception $e) {
1231                                 // Invalid birthday
1232                         }
1233
1234                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1235                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:birthday/text()", $context);
1236
1237                         if (!in_array($value, ["", "0000-00-00", DBA::NULL_DATE])) {
1238                                 $bdyear = date("Y");
1239                                 $value = str_replace(["0000", "0001"], $bdyear, $value);
1240
1241                                 if (strtotime($value) < time()) {
1242                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1243                                 }
1244
1245                                 $poco["bd"] = $value;
1246                         }
1247
1248                         $contact = array_merge($contact_old, $poco);
1249
1250                         if ($contact_old["bdyear"] != $contact["bdyear"]) {
1251                                 Event::createBirthday($contact, $birthday);
1252                         }
1253
1254                         $fields = ['name' => $contact['name'], 'nick' => $contact['nick'], 'about' => $contact['about'],
1255                                 'location' => $contact['location'], 'addr' => $contact['addr'], 'keywords' => $contact['keywords'],
1256                                 'bdyear' => $contact['bdyear'], 'bd' => $contact['bd'], 'hidden' => $contact['hidden'],
1257                                 'xmpp' => $contact['xmpp'], 'name-date' => DateTimeFormat::utc($contact['name-date']),
1258                                 'unsearchable' => $contact['hidden'], 'uri-date' => DateTimeFormat::utc($contact['uri-date'])];
1259
1260                         Contact::update($fields, ['id' => $contact['id'], 'network' => $contact['network']], $contact_old);
1261
1262                         // Update the public contact. Don't set the "hidden" value, this is used differently for public contacts
1263                         unset($fields['hidden']);
1264                         $condition = ['uid' => 0, 'nurl' => Strings::normaliseLink($contact_old['url'])];
1265                         Contact::update($fields, $condition, true);
1266
1267                         Contact::updateAvatar($contact['id'], $author['avatar']);
1268
1269                         $pcid = Contact::getIdForURL($contact_old['url']);
1270                         if (!empty($pcid)) {
1271                                 Contact::updateAvatar($pcid, $author['avatar']);
1272                         }
1273                 }
1274
1275                 return $author;
1276         }
1277
1278         /**
1279          * Transforms activity objects into an XML string
1280          *
1281          * @param object $xpath    XPath object
1282          * @param object $activity Activity object
1283          * @param string $element  element name
1284          *
1285          * @return string XML string
1286          * @todo Find good type-hints for all parameter
1287          */
1288         private static function transformActivity($xpath, $activity, string $element): string
1289         {
1290                 if (!is_object($activity)) {
1291                         return "";
1292                 }
1293
1294                 $obj_doc = new DOMDocument("1.0", "utf-8");
1295                 $obj_doc->formatOutput = true;
1296
1297                 $obj_element = $obj_doc->createElementNS( ActivityNamespace::ATOM1, $element);
1298
1299                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1300                 XML::addElement($obj_doc, $obj_element, "type", $activity_type);
1301
1302                 $id = $xpath->query("atom:id", $activity)->item(0);
1303                 if (is_object($id)) {
1304                         $obj_element->appendChild($obj_doc->importNode($id, true));
1305                 }
1306
1307                 $title = $xpath->query("atom:title", $activity)->item(0);
1308                 if (is_object($title)) {
1309                         $obj_element->appendChild($obj_doc->importNode($title, true));
1310                 }
1311
1312                 $links = $xpath->query("atom:link", $activity);
1313                 if (is_object($links)) {
1314                         foreach ($links as $link) {
1315                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1316                         }
1317                 }
1318
1319                 $content = $xpath->query("atom:content", $activity)->item(0);
1320                 if (is_object($content)) {
1321                         $obj_element->appendChild($obj_doc->importNode($content, true));
1322                 }
1323
1324                 $obj_doc->appendChild($obj_element);
1325
1326                 $objxml = $obj_doc->saveXML($obj_element);
1327
1328                 /// @todo This isn't totally clean. We should find a way to transform the namespaces
1329                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1330                 return($objxml);
1331         }
1332
1333         /**
1334          * Processes the mail elements
1335          *
1336          * @param DOMXPath $xpath    XPath object
1337          * @param DOMNode  $mail     mail elements
1338          * @param array    $importer Record of the importer user mixed with contact of the content
1339          * @return void
1340          * @throws \Exception
1341          */
1342         private static function processMail(DOMXPath $xpath, DOMNode $mail, array $importer)
1343         {
1344                 Logger::notice("Processing mails");
1345
1346                 $msg = [];
1347                 $msg['uid'] = $importer['importer_uid'];
1348                 $msg['from-name'] = XML::getFirstValue($xpath, 'dfrn:sender/dfrn:name/text()', $mail);
1349                 $msg['from-url'] = XML::getFirstValue($xpath, 'dfrn:sender/dfrn:uri/text()', $mail);
1350                 $msg['from-photo'] = XML::getFirstValue($xpath, 'dfrn:sender/dfrn:avatar/text()', $mail);
1351                 $msg['contact-id'] = $importer['id'];
1352                 $msg['uri'] = XML::getFirstValue($xpath, 'dfrn:id/text()', $mail);
1353                 $msg['parent-uri'] = XML::getFirstValue($xpath, 'dfrn:in-reply-to/text()', $mail);
1354                 $msg['created'] = DateTimeFormat::utc(XML::getFirstValue($xpath, 'dfrn:sentdate/text()', $mail));
1355                 $msg['title'] = XML::getFirstValue($xpath, 'dfrn:subject/text()', $mail);
1356                 $msg['body'] = XML::getFirstValue($xpath, 'dfrn:content/text()', $mail);
1357
1358                 Mail::insert($msg);
1359         }
1360
1361         /**
1362          * Processes the suggestion elements
1363          *
1364          * @param DOMXPath $xpath      XPath object
1365          * @param DOMNode  $suggestion suggestion elements
1366          * @param array    $importer   Record of the importer user mixed with contact of the content
1367          * @return boolean
1368          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1369          */
1370         private static function processSuggestion(DOMXPath $xpath, DOMNode $suggestion, array $importer)
1371         {
1372                 Logger::notice('Processing suggestions');
1373
1374                 $url = $xpath->evaluate('string(dfrn:url[1]/text())', $suggestion);
1375                 $cid = Contact::getIdForURL($url);
1376                 $note = $xpath->evaluate('string(dfrn:note[1]/text())', $suggestion);
1377
1378                 return self::addSuggestion($importer['importer_uid'], $cid, $importer['id'], $note);
1379         }
1380
1381         /**
1382          * Suggest a given contact to a given user from a given contact
1383          *
1384          * @param integer $uid
1385          * @param integer $cid
1386          * @param integer $from_cid
1387          * @return bool   Was the adding successful?
1388          */
1389         private static function addSuggestion(int $uid, int $cid, int $from_cid, string $note = ''): bool
1390         {
1391                 $owner = User::getOwnerDataById($uid);
1392                 $contact = Contact::getById($cid);
1393                 $from_contact = Contact::getById($from_cid);
1394
1395                 if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($contact['url']), 'uid' => $uid])) {
1396                         return false;
1397                 }
1398
1399                 // Quit if we already have an introduction for this person
1400                 if (DI::intro()->suggestionExistsForUser($cid, $uid)) {
1401                         return false;
1402                 }
1403
1404                 $suggest = [];
1405                 $suggest['uid'] = $uid;
1406                 $suggest['cid'] = $from_cid;
1407                 $suggest['url'] = $contact['url'];
1408                 $suggest['name'] = $contact['name'];
1409                 $suggest['photo'] = $contact['photo'];
1410                 $suggest['request'] = $contact['request'];
1411                 $suggest['title'] = '';
1412                 $suggest['body'] = $note;
1413
1414                 DI::intro()->save(DI::introFactory()->createNew(
1415                         $suggest['uid'],
1416                         $suggest['cid'],
1417                         $suggest['body'],
1418                         null,
1419                         $cid
1420                 ));
1421
1422                 DI::notify()->createFromArray([
1423                         'type'  => Notification\Type::SUGGEST,
1424                         'otype' => Notification\ObjectType::INTRO,
1425                         'verb'  => Activity::REQ_FRIEND,
1426                         'uid'   => $owner['uid'],
1427                         'cid'   => $from_contact['uid'],
1428                         'item'  => $suggest,
1429                         'link'  => DI::baseUrl().'/notifications/intros',
1430                 ]);
1431
1432                 return true;
1433         }
1434
1435         /**
1436          * Processes the relocation elements
1437          *
1438          * @param DOMXPath $xpath      XPath object
1439          * @param DOMNode  $relocation relocation elements
1440          * @param array    $importer   Record of the importer user mixed with contact of the content
1441          * @return boolean
1442          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1443          * @throws \ImagickException
1444          * @todo  Find good type-hints for all parameter
1445          */
1446         private static function processRelocation(DOMXPath $xpath, DOMNode $relocation, array $importer): bool
1447         {
1448                 Logger::notice("Processing relocations");
1449
1450                 /// @TODO Rewrite this to one statement
1451                 $relocate = [];
1452                 $relocate['uid'] = $importer['importer_uid'];
1453                 $relocate['cid'] = $importer['id'];
1454                 $relocate['url'] = $xpath->query('dfrn:url/text()', $relocation)->item(0)->nodeValue;
1455                 $relocate['addr'] = $xpath->query('dfrn:addr/text()', $relocation)->item(0)->nodeValue;
1456                 $relocate['name'] = $xpath->query('dfrn:name/text()', $relocation)->item(0)->nodeValue;
1457                 $relocate['avatar'] = $xpath->query('dfrn:avatar/text()', $relocation)->item(0)->nodeValue;
1458                 $relocate['photo'] = $xpath->query('dfrn:photo/text()', $relocation)->item(0)->nodeValue;
1459                 $relocate['thumb'] = $xpath->query('dfrn:thumb/text()', $relocation)->item(0)->nodeValue;
1460                 $relocate['micro'] = $xpath->query('dfrn:micro/text()', $relocation)->item(0)->nodeValue;
1461                 $relocate['request'] = $xpath->query('dfrn:request/text()', $relocation)->item(0)->nodeValue;
1462                 $relocate['confirm'] = $xpath->query('dfrn:confirm/text()', $relocation)->item(0)->nodeValue;
1463                 $relocate['notify'] = $xpath->query('dfrn:notify/text()', $relocation)->item(0)->nodeValue;
1464                 $relocate['poll'] = $xpath->query('dfrn:poll/text()', $relocation)->item(0)->nodeValue;
1465                 $relocate['sitepubkey'] = $xpath->query('dfrn:sitepubkey/text()', $relocation)->item(0)->nodeValue;
1466
1467                 if (($relocate['avatar'] == '') && ($relocate['photo'] != '')) {
1468                         $relocate['avatar'] = $relocate['photo'];
1469                 }
1470
1471                 if ($relocate['addr'] == '') {
1472                         $relocate['addr'] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", '$3@$2', $relocate['url']);
1473                 }
1474
1475                 // update contact
1476                 $old = Contact::selectFirst(['photo', 'url'], ['id' => $importer['id'], 'uid' => $importer['importer_uid']]);
1477                 if (!DBA::isResult($old)) {
1478                         Logger::warning('Existing contact had not been fetched', ['id' => $importer['id']]);
1479                         return false;
1480                 }
1481
1482                 // Update the contact table. We try to find every entry.
1483                 $fields = [
1484                         'name' => $relocate['name'],
1485                         'avatar' => $relocate['avatar'],
1486                         'url' => $relocate['url'],
1487                         'nurl' => Strings::normaliseLink($relocate['url']),
1488                         'addr' => $relocate['addr'],
1489                         'request' => $relocate['request'],
1490                         'confirm' => $relocate['confirm'],
1491                         'notify' => $relocate['notify'],
1492                         'poll' => $relocate['poll'],
1493                         'site-pubkey' => $relocate['sitepubkey'],
1494                 ];
1495                 $condition = ["(`id` = ?) OR (`nurl` = ?)", $importer['id'], Strings::normaliseLink($old['url'])];
1496
1497                 Contact::update($fields, $condition);
1498
1499                 Contact::updateAvatar($importer['id'], $relocate['avatar'], true);
1500
1501                 Logger::notice('Contacts are updated.');
1502
1503                 /// @TODO
1504                 /// merge with current record, current contents have priority
1505                 /// update record, set url-updated
1506                 /// update profile photos
1507                 /// schedule a scan?
1508                 return true;
1509         }
1510
1511         /**
1512          * Updates an item
1513          *
1514          * @param array $current   the current item record
1515          * @param array $item      the new item record
1516          * @param array $importer  Record of the importer user mixed with contact of the content
1517          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
1518          * @return mixed
1519          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1520          * @todo  set proper type-hints (array?)
1521          */
1522         private static function updateContent(array $current, array $item, array $importer, int $entrytype)
1523         {
1524                 $changed = false;
1525
1526                 if (self::isEditedTimestampNewer($current, $item)) {
1527                         // do not accept (ignore) an earlier edit than one we currently have.
1528                         if (DateTimeFormat::utc($item['edited']) < $current['edited']) {
1529                                 return false;
1530                         }
1531
1532                         $fields = [
1533                                 'title' => $item['title'] ?? '',
1534                                 'body' => $item['body'] ?? '',
1535                                 'changed' => DateTimeFormat::utcNow(),
1536                                 'edited' => DateTimeFormat::utc($item['edited']),
1537                         ];
1538
1539                         $condition = ["`uri` = ? AND `uid` IN (0, ?)", $item['uri'], $importer['importer_uid']];
1540                         Item::update($fields, $condition);
1541
1542                         $changed = true;
1543                 }
1544                 return $changed;
1545         }
1546
1547         /**
1548          * Detects the entry type of the item
1549          *
1550          * @param array $importer Record of the importer user mixed with contact of the content
1551          * @param array $item     the new item record
1552          *
1553          * @return int Is it a toplevel entry, a comment or a relayed comment?
1554          * @throws \Exception
1555          * @todo  set proper type-hints (array?)
1556          */
1557         private static function getEntryType(array $importer, array $item): int
1558         {
1559                 if ($item['thr-parent'] != $item['uri']) {
1560                         // was the top-level post for this action written by somebody on this site?
1561                         // Specifically, the recipient?
1562                         if (Post::exists(['uri' => $item['thr-parent'], 'uid' => $importer['importer_uid'], 'self' => true, 'wall' => true])) {
1563                                 return self::REPLY_RC;
1564                         } else {
1565                                 return self::REPLY;
1566                         }
1567                 } else {
1568                         return self::TOP_LEVEL;
1569                 }
1570         }
1571
1572         /**
1573          * Processes several actions, depending on the verb
1574          *
1575          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
1576          * @param array $importer  Record of the importer user mixed with contact of the content
1577          * @param array $item      the new item record
1578          *
1579          * @return bool Should the processing of the entries be continued?
1580          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1581          */
1582         private static function processVerbs(int $entrytype, array $importer, array &$item)
1583         {
1584                 Logger::info('Process verb ' . $item['verb'] . ' and object-type ' . $item['object-type'] . ' for entrytype ' . $entrytype);
1585
1586                 if (($entrytype == self::TOP_LEVEL) && !empty($importer['id'])) {
1587                         // The filling of the the "contact" variable is done for legcy reasons
1588                         // The functions below are partly used by ostatus.php as well - where we have this variable
1589                         $contact = Contact::selectFirst([], ['id' => $importer['id']]);
1590
1591                         $activity = DI::activity();
1592
1593                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
1594                         // This function once was responsible for DFRN and OStatus.
1595                         if ($activity->match($item['verb'], Activity::FOLLOW)) {
1596                                 Logger::notice("New follower");
1597                                 Contact::addRelationship($importer, $contact, $item);
1598                                 return false;
1599                         }
1600                         if ($activity->match($item['verb'], Activity::UNFOLLOW)) {
1601                                 Logger::notice("Lost follower");
1602                                 Contact::removeFollower($contact);
1603                                 return false;
1604                         }
1605                         if ($activity->match($item['verb'], Activity::REQ_FRIEND)) {
1606                                 Logger::notice("New friend request");
1607                                 Contact::addRelationship($importer, $contact, $item, true);
1608                                 return false;
1609                         }
1610                         if ($activity->match($item['verb'], Activity::UNFRIEND)) {
1611                                 Logger::notice("Lost sharer");
1612                                 Contact::removeSharer($contact);
1613                                 return false;
1614                         }
1615                 } else {
1616                         if (($item['verb'] == Activity::LIKE)
1617                                 || ($item['verb'] == Activity::DISLIKE)
1618                                 || ($item['verb'] == Activity::ATTEND)
1619                                 || ($item['verb'] == Activity::ATTENDNO)
1620                                 || ($item['verb'] == Activity::ATTENDMAYBE)
1621                                 || ($item['verb'] == Activity::ANNOUNCE)
1622                         ) {
1623                                 $item['gravity'] = Item::GRAVITY_ACTIVITY;
1624                                 // only one like or dislike per person
1625                                 // split into two queries for performance issues
1626                                 $condition = [
1627                                         'uid'        => $item['uid'],
1628                                         'author-id'  => $item['author-id'],
1629                                         'gravity'    => Item::GRAVITY_ACTIVITY,
1630                                         'verb'       => $item['verb'],
1631                                         'parent-uri' => $item['thr-parent'],
1632                                 ];
1633                                 if (Post::exists($condition)) {
1634                                         return false;
1635                                 }
1636
1637                                 $condition = ['uid' => $item['uid'], 'author-id' => $item['author-id'], 'gravity' => Item::GRAVITY_ACTIVITY,
1638                                         'verb' => $item['verb'], 'thr-parent' => $item['thr-parent']];
1639                                 if (Post::exists($condition)) {
1640                                         return false;
1641                                 }
1642
1643                                 // The owner of an activity must be the author
1644                                 $item['owner-name'] = $item['author-name'];
1645                                 $item['owner-link'] = $item['author-link'];
1646                                 $item['owner-avatar'] = $item['author-avatar'];
1647                                 $item['owner-id'] = $item['author-id'];
1648                         }
1649
1650                         if (($item['verb'] == Activity::TAG) && ($item['object-type'] == Activity\ObjectType::TAGTERM)) {
1651                                 $xo = XML::parseString($item['object']);
1652                                 $xt = XML::parseString($item['target']);
1653
1654                                 if ($xt->type == Activity\ObjectType::NOTE) {
1655                                         $item_tag = Post::selectFirst(['id', 'uri-id'], ['uri' => $xt->id, 'uid' => $importer['importer_uid']]);
1656                                         if (!DBA::isResult($item_tag)) {
1657                                                 Logger::warning('Post had not been fetched', ['uri' => $xt->id, 'uid' => $importer['importer_uid']]);
1658                                                 return false;
1659                                         }
1660
1661                                         // extract tag, if not duplicate, add to parent item
1662                                         if ($xo->content) {
1663                                                 Tag::store($item_tag['uri-id'], Tag::HASHTAG, $xo->content);
1664                                         }
1665                                 }
1666                         }
1667                 }
1668                 return true;
1669         }
1670
1671         /**
1672          * Processes the link elements
1673          *
1674          * @param object $links link elements
1675          * @param array  $item  the item record
1676          * @return void
1677          * @todo set proper type-hints
1678          */
1679         private static function parseLinks($links, array &$item)
1680         {
1681                 $rel = '';
1682                 $href = '';
1683                 $type = null;
1684                 $length = null;
1685                 $title = null;
1686                 foreach ($links as $link) {
1687                         foreach ($link->attributes as $attributes) {
1688                                 switch ($attributes->name) {
1689                                         case 'href'  : $href   = $attributes->textContent; break;
1690                                         case 'rel'   : $rel    = $attributes->textContent; break;
1691                                         case 'type'  : $type   = $attributes->textContent; break;
1692                                         case 'length': $length = $attributes->textContent; break;
1693                                         case 'title' : $title  = $attributes->textContent; break;
1694                                 }
1695                         }
1696                         if (($rel != '') && ($href != '')) {
1697                                 switch ($rel) {
1698                                         case 'alternate':
1699                                                 $item['plink'] = $href;
1700                                                 break;
1701
1702                                         case 'enclosure':
1703                                                 Post\Media::insert(['uri-id' => $item['uri-id'], 'type' => Post\Media::DOCUMENT,
1704                                                         'url' => $href, 'mimetype' => $type, 'size' => $length, 'description' => $title]);
1705                                                 break;
1706                                 }
1707                         }
1708                 }
1709         }
1710
1711         /**
1712          * Checks if an incoming message is wanted
1713          *
1714          * @param array $item
1715          * @param array $imporer
1716          * @return boolean Is the message wanted?
1717          */
1718         private static function isSolicitedMessage(array $item, array $importer): bool
1719         {
1720                 if (DBA::exists('contact', ["`nurl` = ? AND `uid` != ? AND `rel` IN (?, ?)",
1721                         Strings::normaliseLink($item["author-link"]), 0, Contact::FRIEND, Contact::SHARING])) {
1722                         Logger::debug('Author has got followers - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'author' => $item["author-link"]]);
1723                         return true;
1724                 }
1725
1726                 if ($importer['importer_uid'] != 0) {
1727                         Logger::debug('Message is directed to a user - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri'], 'importer' => $importer['importer_uid']]);
1728                         return true;
1729                 }
1730
1731                 if ($item['uri'] != $item['thr-parent']) {
1732                         Logger::debug('Message is no parent - accepted', ['uri-id' => $item['uri-id'], 'guid' => $item['guid'], 'url' => $item['uri']]);
1733                         return true;
1734                 }
1735
1736                 $tags = array_column(Tag::getByURIId($item['uri-id'], [Tag::HASHTAG]), 'name');
1737                 if (Relay::isSolicitedPost($tags, $item['body'], $item['author-id'], $item['uri'], Protocol::DFRN)) {
1738                         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"]]);
1739                         return true;
1740                 } else {
1741                         return false;
1742                 }
1743         }
1744
1745         /**
1746          * Processes the entry elements which contain the items and comments
1747          *
1748          * @param array    $header   Array of the header elements that always stay the same
1749          * @param DOMXPath $xpath    XPath object
1750          * @param DOMNode  $entry    entry elements
1751          * @param array    $importer Record of the importer user mixed with contact of the content
1752          * @param string   $xml      XML
1753          * @param int $protocol Protocol
1754          * @return void
1755          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1756          * @throws \ImagickException
1757          * @todo  Add type-hints
1758          */
1759         private static function processEntry(array $header, DOMXPath $xpath, DOMNode $entry, array $importer, string $xml, int $protocol)
1760         {
1761                 Logger::notice("Processing entries");
1762
1763                 $item = $header;
1764
1765                 $item['source'] = $xml;
1766
1767                 // Get the uri
1768                 $item['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
1769
1770                 $item['edited'] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
1771
1772                 $current = Post::selectFirst(['id', 'uid', 'edited', 'body'],
1773                         ['uri' => $item['uri'], 'uid' => $importer['importer_uid']]
1774                 );
1775                 // Is there an existing item?
1776                 if (DBA::isResult($current) && !self::isEditedTimestampNewer($current, $item)) {
1777                         Logger::info("Item " . $item['uri'] . " (" . $item['edited'] . ") already existed.");
1778                         return;
1779                 }
1780
1781                 // Fetch the owner
1782                 $owner = self::fetchauthor($xpath, $entry, $importer, 'dfrn:owner', true, $xml);
1783
1784                 $owner_unknown = (isset($owner['contact-unknown']) && $owner['contact-unknown']);
1785
1786                 $item['owner-name'] = $owner['name'];
1787                 $item['owner-link'] = $owner['link'];
1788                 $item['owner-avatar'] = $owner['avatar'];
1789                 $item['owner-id'] = Contact::getIdForURL($owner['link'], 0);
1790
1791                 // fetch the author
1792                 $author = self::fetchauthor($xpath, $entry, $importer, 'atom:author', true, $xml);
1793
1794                 $item['author-name'] = $author['name'];
1795                 $item['author-link'] = $author['link'];
1796                 $item['author-avatar'] = $author['avatar'];
1797                 $item['author-id'] = Contact::getIdForURL($author['link'], 0);
1798
1799                 $item['title'] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
1800
1801                 if (!empty($item['title'])) {
1802                         $item['post-type'] = Item::PT_ARTICLE;
1803                 } else {
1804                         $item['post-type'] = Item::PT_NOTE;
1805                 }
1806
1807                 $item['created'] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
1808
1809                 $item['body'] = XML::getFirstNodeValue($xpath, 'dfrn:env/text()', $entry);
1810                 $item['body'] = str_replace([' ',"\t","\r","\n"], ['','','',''], $item['body']);
1811
1812                 $item['body'] = Strings::base64UrlDecode($item['body']);
1813
1814                 $item['body'] = BBCode::limitBodySize($item['body']);
1815
1816                 /// @todo We should check for a repeated post and if we know the repeated author.
1817
1818                 // We don't need the content element since "dfrn:env" is always present
1819                 //$item['body'] = $xpath->query('atom:content/text()', $entry)->item(0)->nodeValue;
1820                 $item['location'] = XML::getFirstNodeValue($xpath, 'dfrn:location/text()', $entry);
1821                 $item['coord'] = XML::getFirstNodeValue($xpath, 'georss:point', $entry);
1822                 $item['private'] = XML::getFirstNodeValue($xpath, 'dfrn:private/text()', $entry);
1823
1824                 $unlisted = XML::getFirstNodeValue($xpath, 'dfrn:unlisted/text()', $entry);
1825                 if (!empty($unlisted) && ($item['private'] != Item::PRIVATE)) {
1826                         $item['private'] = Item::UNLISTED;
1827                 }
1828
1829                 $item['extid'] = XML::getFirstNodeValue($xpath, 'dfrn:extid/text()', $entry);
1830
1831                 if (XML::getFirstNodeValue($xpath, 'dfrn:bookmark/text()', $entry) == 'true') {
1832                         $item['post-type'] = Item::PT_PAGE;
1833                 }
1834
1835                 $notice_info = $xpath->query('statusnet:notice_info', $entry);
1836                 if ($notice_info && ($notice_info->length > 0)) {
1837                         foreach ($notice_info->item(0)->attributes as $attributes) {
1838                                 if ($attributes->name == 'source') {
1839                                         $item['app'] = strip_tags($attributes->textContent);
1840                                 }
1841                         }
1842                 }
1843
1844                 $item['guid'] = XML::getFirstNodeValue($xpath, 'dfrn:diaspora_guid/text()', $entry);
1845
1846                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1847
1848                 $quote_uri_id = Item::getQuoteUriId($item['body'], $item['uid']);
1849                 if (!empty($quote_uri_id)) {
1850                         $item['quote-uri-id'] = $quote_uri_id;
1851                         $item['body']         = BBCode::removeSharedData($item['body']);
1852                 }
1853
1854                 Tag::storeFromBody($item['uri-id'], $item['body']);
1855
1856                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "Item::insert"
1857                 $dsprsig = XML::unescape(XML::getFirstNodeValue($xpath, 'dfrn:diaspora_signature/text()', $entry));
1858                 if ($dsprsig != '') {
1859                         $signature = json_decode(base64_decode($dsprsig));
1860                         // We don't store the old style signatures anymore that also contained the "signature" and "signer"
1861                         if (!empty($signature->signed_text) && empty($signature->signature) && empty($signature->signer)) {
1862                                 $item['diaspora_signed_text'] = $signature->signed_text;
1863                         }
1864                 }
1865
1866                 $item['verb'] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
1867
1868                 if (XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry) != '') {
1869                         $item['object-type'] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
1870                 }
1871
1872                 $object = $xpath->query('activity:object', $entry)->item(0);
1873                 $item['object'] = self::transformActivity($xpath, $object, 'object');
1874
1875                 if (trim($item['object']) != '') {
1876                         $r = XML::parseString($item['object']);
1877                         if (isset($r->type)) {
1878                                 $item['object-type'] = $r->type;
1879                         }
1880                 }
1881
1882                 $target = $xpath->query('activity:target', $entry)->item(0);
1883                 $item['target'] = self::transformActivity($xpath, $target, 'target');
1884
1885                 $categories = $xpath->query('atom:category', $entry);
1886                 if ($categories) {
1887                         foreach ($categories as $category) {
1888                                 $term = '';
1889                                 $scheme = '';
1890                                 foreach ($category->attributes as $attributes) {
1891                                         if ($attributes->name == 'term') {
1892                                                 $term = $attributes->textContent;
1893                                         }
1894
1895                                         if ($attributes->name == 'scheme') {
1896                                                 $scheme = $attributes->textContent;
1897                                         }
1898                                 }
1899
1900                                 if (($term != '') && ($scheme != '')) {
1901                                         $parts = explode(':', $scheme);
1902                                         if ((count($parts) >= 4) && (array_shift($parts) == 'X-DFRN')) {
1903                                                 $termurl = array_pop($parts);
1904                                                 $termurl = array_pop($parts) . ':' . $termurl;
1905                                                 Tag::store($item['uri-id'], Tag::IMPLICIT_MENTION, $term, $termurl);
1906                                         }
1907                                 }
1908                         }
1909                 }
1910
1911                 $links = $xpath->query('atom:link', $entry);
1912                 if ($links) {
1913                         self::parseLinks($links, $item);
1914                 }
1915
1916                 $item['conversation'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
1917
1918                 $conv = $xpath->query('ostatus:conversation', $entry);
1919                 if (is_object($conv->item(0))) {
1920                         foreach ($conv->item(0)->attributes as $attributes) {
1921                                 if ($attributes->name == 'ref') {
1922                                         $item['conversation'] = $attributes->textContent;
1923                                 }
1924                                 if ($attributes->name == 'href') {
1925                                         $item['conversation'] = $attributes->textContent;
1926                                 }
1927                         }
1928                 }
1929
1930                 // Is it a reply or a top level posting?
1931                 $item['thr-parent'] = $item['uri'];
1932
1933                 $inreplyto = $xpath->query('thr:in-reply-to', $entry);
1934                 if (is_object($inreplyto->item(0))) {
1935                         foreach ($inreplyto->item(0)->attributes as $attributes) {
1936                                 if ($attributes->name == 'ref') {
1937                                         $item['thr-parent'] = $attributes->textContent;
1938                                 }
1939                         }
1940                 }
1941
1942                 // Check if the message is wanted
1943                 if (!self::isSolicitedMessage($item, $importer)) {
1944                         DBA::delete('item-uri', ['uri' => $item['uri']]);
1945                         return 403;
1946                 }
1947
1948                 // Get the type of the item (Top level post, reply or remote reply)
1949                 $entrytype = self::getEntryType($importer, $item);
1950
1951                 // Now assign the rest of the values that depend on the type of the message
1952                 if (in_array($entrytype, [self::REPLY, self::REPLY_RC])) {
1953                         $item['gravity'] = Item::GRAVITY_COMMENT;
1954
1955                         if (!isset($item['object-type'])) {
1956                                 $item['object-type'] = Activity\ObjectType::COMMENT;
1957                         }
1958
1959                         if ($item['contact-id'] != $owner['contact-id']) {
1960                                 $item['contact-id'] = $owner['contact-id'];
1961                         }
1962
1963                         if (($item['network'] != $owner['network']) && ($owner['network'] != '')) {
1964                                 $item['network'] = $owner['network'];
1965                         }
1966
1967                         if ($item['contact-id'] != $author['contact-id']) {
1968                                 $item['contact-id'] = $author['contact-id'];
1969                         }
1970
1971                         if (($item['network'] != $author['network']) && ($author['network'] != '')) {
1972                                 $item['network'] = $author['network'];
1973                         }
1974                 }
1975
1976                 if ($entrytype == self::REPLY_RC) {
1977                         $item['wall'] = 1;
1978                 } elseif ($entrytype == self::TOP_LEVEL) {
1979                         $item['gravity'] = Item::GRAVITY_PARENT;
1980
1981                         if (!isset($item['object-type'])) {
1982                                 $item['object-type'] = Activity\ObjectType::NOTE;
1983                         }
1984
1985                         // Is it an event?
1986                         if (($item['object-type'] == Activity\ObjectType::EVENT) && !$owner_unknown) {
1987                                 Logger::info("Item " . $item['uri'] . " seems to contain an event.");
1988                                 $ev = Event::fromBBCode($item['body']);
1989                                 if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1990                                         Logger::info("Event in item " . $item['uri'] . " was found.");
1991                                         $ev['cid']       = $importer['id'];
1992                                         $ev['uid']       = $importer['importer_uid'];
1993                                         $ev['uri']       = $item['uri'];
1994                                         $ev['edited']    = $item['edited'];
1995                                         $ev['private']   = $item['private'];
1996                                         $ev['guid']      = $item['guid'];
1997                                         $ev['plink']     = $item['plink'];
1998                                         $ev['network']   = $item['network'];
1999                                         $ev['protocol']  = $item['protocol'];
2000                                         $ev['direction'] = $item['direction'];
2001                                         $ev['source']    = $item['source'];
2002
2003                                         $condition = ['uri' => $item['uri'], 'uid' => $importer['importer_uid']];
2004                                         $event = DBA::selectFirst('event', ['id'], $condition);
2005                                         if (DBA::isResult($event)) {
2006                                                 $ev['id'] = $event['id'];
2007                                         }
2008
2009                                         $event_id = Event::store($ev);
2010                                         Logger::info('Event was stored', ['id' => $event_id]);
2011
2012                                         $item = Event::getItemArrayForImportedId($event_id, $item);
2013                                 }
2014                         }
2015                 }
2016
2017                 if (!self::processVerbs($entrytype, $importer, $item)) {
2018                         Logger::info("Exiting because 'processVerbs' told us so");
2019                         return;
2020                 }
2021
2022                 // This check is done here to be able to receive connection requests in "processVerbs"
2023                 if (($entrytype == self::TOP_LEVEL) && $owner_unknown) {
2024                         Logger::info("Item won't be stored because user " . $importer['importer_uid'] . " doesn't follow " . $item['owner-link'] . ".");
2025                         return;
2026                 }
2027
2028
2029                 // Update content if 'updated' changes
2030                 if (DBA::isResult($current)) {
2031                         if (self::updateContent($current, $item, $importer, $entrytype)) {
2032                                 Logger::info("Item " . $item['uri'] . " was updated.");
2033                         } else {
2034                                 Logger::info("Item " . $item['uri'] . " already existed.");
2035                         }
2036                         return;
2037                 }
2038
2039                 if (in_array($entrytype, [self::REPLY, self::REPLY_RC])) {
2040                         if (($item['uid'] != 0) && !Post::exists(['uid' => $item['uid'], 'uri' => $item['thr-parent']])) {
2041                                 if (DI::pConfig()->get($item['uid'], 'system', 'accept_only_sharer') == Item::COMPLETION_NONE) {
2042                                         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' => $item['uri']]);
2043                                         return;
2044                                 }
2045                                 if (!Contact::isSharing($item['owner-id'], $item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
2046                                         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' => $item['uri']]);
2047                                         return;
2048                                 }
2049                                 if (($item['gravity'] == Item::GRAVITY_ACTIVITY) && DI::pConfig()->get($item['uid'], 'system', 'accept_only_sharer') == Item::COMPLETION_COMMENT) {
2050                                         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']]);
2051                                         return;
2052                                 }
2053                                 Logger::debug('Post is accepted.', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2054                         } else {
2055                                 Logger::debug('Thread parent exists.', ['uid' => $item['uid'], 'owner-id' => $item['owner-id'], 'author-id' => $item['author-id'], 'gravity' => $item['gravity'], 'uri' => $item['uri']]);
2056                         }
2057
2058                         // Will be overwritten for sharing accounts in Item::insert
2059                         if (empty($item['post-reason']) && ($entrytype == self::REPLY)) {
2060                                 $item['post-reason'] = Item::PR_COMMENT;
2061                         }
2062
2063                         $posted_id = Item::insert($item);
2064                         if ($posted_id) {
2065                                 Logger::info("Reply from contact " . $item['contact-id'] . " was stored with id " . $posted_id);
2066
2067                                 if ($item['uid'] == 0) {
2068                                         Item::distribute($posted_id);
2069                                 }
2070
2071                                 return true;
2072                         }
2073                 } else { // $entrytype == self::TOP_LEVEL
2074                         if (($item['uid'] != 0) && !Contact::isSharing($item['owner-id'], $item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
2075                                 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']]);
2076                                 return;
2077                         }
2078
2079                         // This is my contact on another system, but it's really me.
2080                         // Turn this into a wall post.
2081                         $notify = Item::isRemoteSelf($importer, $item);
2082
2083                         $posted_id = Item::insert($item, $notify);
2084
2085                         if ($notify) {
2086                                 $posted_id = $notify;
2087                         }
2088
2089                         Logger::info("Item was stored with id " . $posted_id);
2090
2091                         if ($item['uid'] == 0) {
2092                                 Item::distribute($posted_id);
2093                         }
2094                 }
2095         }
2096
2097         /**
2098          * Deletes items
2099          *
2100          * @param DOMXPath $xpath XPath object
2101          * @param DOMNode  $deletion deletion elements
2102          * @param array   $importer Record of the importer user mixed with contact of the content
2103          * @return void
2104          * @throws \Exception
2105          */
2106         private static function processDeletion(DOMXPath $xpath, DOMNode $deletion, array $importer)
2107         {
2108                 Logger::notice("Processing deletions");
2109                 $uri = null;
2110
2111                 foreach ($deletion->attributes as $attributes) {
2112                         if ($attributes->name == 'ref') {
2113                                 $uri = $attributes->textContent;
2114                         }
2115                 }
2116
2117                 if (!$uri || !$importer['id']) {
2118                         return false;
2119                 }
2120
2121                 $condition = ['uri' => $uri, 'uid' => $importer['importer_uid']];
2122                 $item = Post::selectFirst(['id', 'parent', 'contact-id', 'uri-id', 'deleted', 'gravity'], $condition);
2123                 if (!DBA::isResult($item)) {
2124                         Logger::info('Item with URI ' . $uri . ' for user ' . $importer['importer_uid'] . ' was not found.');
2125                         return;
2126                 }
2127
2128                 if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $importer['importer_uid'], 'type' => Post\Category::FILE])) {
2129                         Logger::notice('Item is filed. It will not be deleted.', ['uri' => $uri, 'uri-id' => $item['uri_id'], 'uid' => $importer['importer_uid']]);
2130                         return;
2131                 }
2132
2133                 // When it is a starting post it has to belong to the person that wants to delete it
2134                 if (($item['gravity'] == Item::GRAVITY_PARENT) && ($item['contact-id'] != $importer['id'])) {
2135                         Logger::info('Item with URI ' . $uri . ' do not belong to contact ' . $importer['id'] . ' - ignoring deletion.');
2136                         return;
2137                 }
2138
2139                 // Comments can be deleted by the thread owner or comment owner
2140                 if (($item['gravity'] != Item::GRAVITY_PARENT) && ($item['contact-id'] != $importer['id'])) {
2141                         $condition = ['id' => $item['parent'], 'contact-id' => $importer['id']];
2142                         if (!Post::exists($condition)) {
2143                                 Logger::info('Item with URI ' . $uri . ' was not found or must not be deleted by contact ' . $importer['id'] . ' - ignoring deletion.');
2144                                 return;
2145                         }
2146                 }
2147
2148                 if ($item['deleted']) {
2149                         return;
2150                 }
2151
2152                 Logger::info('deleting item '.$item['id'].' uri='.$uri);
2153
2154                 Item::markForDeletion(['id' => $item['id']]);
2155         }
2156
2157         /**
2158          * Imports a DFRN message
2159          *
2160          * @param string $xml       The DFRN message
2161          * @param array  $importer  Record of the importer user mixed with contact of the content
2162          * @param int    $protocol  Transport protocol
2163          * @param int    $direction Is the message pushed or pulled?
2164          * @return integer Import status
2165          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2166          * @throws \ImagickException
2167          */
2168         public static function import(string $xml, array $importer, int $protocol, int $direction): int
2169         {
2170                 if ($xml == '') {
2171                         return 400;
2172                 }
2173
2174                 $doc = new DOMDocument();
2175                 @$doc->loadXML($xml);
2176
2177                 $xpath = new DOMXPath($doc);
2178                 $xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
2179                 $xpath->registerNamespace('thr', ActivityNamespace::THREAD);
2180                 $xpath->registerNamespace('at', ActivityNamespace::TOMB);
2181                 $xpath->registerNamespace('media', ActivityNamespace::MEDIA);
2182                 $xpath->registerNamespace('dfrn', ActivityNamespace::DFRN);
2183                 $xpath->registerNamespace('activity', ActivityNamespace::ACTIVITY);
2184                 $xpath->registerNamespace('georss', ActivityNamespace::GEORSS);
2185                 $xpath->registerNamespace('poco', ActivityNamespace::POCO);
2186                 $xpath->registerNamespace('ostatus', ActivityNamespace::OSTATUS);
2187                 $xpath->registerNamespace('statusnet', ActivityNamespace::STATUSNET);
2188
2189                 $header = [];
2190                 $header['uid'] = $importer['importer_uid'];
2191                 $header['network'] = Protocol::DFRN;
2192                 $header['protocol'] = $protocol;
2193                 $header['wall'] = 0;
2194                 $header['origin'] = 0;
2195                 $header['contact-id'] = $importer['id'];
2196
2197                 $header = Diaspora::setDirection($header, $direction);
2198
2199                 if ($direction === Conversation::RELAY) {
2200                         $header['post-reason'] = Item::PR_RELAY;
2201                 }
2202
2203                 // Update the contact table if the data has changed
2204
2205                 // The "atom:author" is only present in feeds
2206                 if ($xpath->query('/atom:feed/atom:author')->length > 0) {
2207                         self::fetchauthor($xpath, $doc->firstChild, $importer, 'atom:author', false, $xml);
2208                 }
2209
2210                 // Only the "dfrn:owner" in the head section contains all data
2211                 if ($xpath->query('/atom:feed/dfrn:owner')->length > 0) {
2212                         self::fetchauthor($xpath, $doc->firstChild, $importer, 'dfrn:owner', false, $xml);
2213                 }
2214
2215                 Logger::info("Import DFRN message for user " . $importer['importer_uid'] . " from contact " . $importer['id']);
2216
2217                 if (!empty($importer['gsid']) && ($protocol == Conversation::PARCEL_DIASPORA_DFRN)) {
2218                         GServer::setProtocol($importer['gsid'], Post\DeliveryData::DFRN);
2219                 }
2220
2221                 // is it a public forum? Private forums aren't exposed with this method
2222                 $forum = intval(XML::getFirstNodeValue($xpath, '/atom:feed/dfrn:community/text()'));
2223
2224                 // The account type is new since 3.5.1
2225                 if ($xpath->query('/atom:feed/dfrn:account_type')->length > 0) {
2226                         // Hint: We are using separate update calls for uid=0 and uid!=0 since a combined call is bad for the database performance
2227
2228                         $accounttype = intval(XML::getFirstNodeValue($xpath, '/atom:feed/dfrn:account_type/text()'));
2229
2230                         if ($accounttype != $importer['contact-type']) {
2231                                 Contact::update(['contact-type' => $accounttype], ['id' => $importer['id']]);
2232
2233                                 // Updating the public contact as well
2234                                 Contact::update(['contact-type' => $accounttype], ['uid' => 0, 'nurl' => $importer['nurl']]);
2235                         }
2236                         // A forum contact can either have set "forum" or "prv" - but not both
2237                         if ($accounttype == User::ACCOUNT_TYPE_COMMUNITY) {
2238                                 // It's a forum, so either set the public or private forum flag
2239                                 $condition = ['(`forum` != ? OR `prv` != ?) AND `id` = ?', $forum, !$forum, $importer['id']];
2240                                 Contact::update(['forum' => $forum, 'prv' => !$forum], $condition);
2241
2242                                 // Updating the public contact as well
2243                                 $condition = ['(`forum` != ? OR `prv` != ?) AND `uid` = 0 AND `nurl` = ?', $forum, !$forum, $importer['nurl']];
2244                                 Contact::update(['forum' => $forum, 'prv' => !$forum], $condition);
2245                         } else {
2246                                 // It's not a forum, so remove the flags
2247                                 $condition = ['(`forum` OR `prv`) AND `id` = ?', $importer['id']];
2248                                 Contact::update(['forum' => false, 'prv' => false], $condition);
2249
2250                                 // Updating the public contact as well
2251                                 $condition = ['(`forum` OR `prv`) AND `uid` = 0 AND `nurl` = ?', $importer['nurl']];
2252                                 Contact::update(['forum' => false, 'prv' => false], $condition);
2253                         }
2254                 } elseif ($forum != $importer['forum']) { // Deprecated since 3.5.1
2255                         $condition = ['`forum` != ? AND `id` = ?', $forum, $importer['id']];
2256                         Contact::update(['forum' => $forum], $condition);
2257
2258                         // Updating the public contact as well
2259                         $condition = ['`forum` != ? AND `uid` = 0 AND `nurl` = ?', $forum, $importer['nurl']];
2260                         Contact::update(['forum' => $forum], $condition);
2261                 }
2262
2263
2264                 // We are processing relocations even if we are ignoring a contact
2265                 $relocations = $xpath->query('/atom:feed/dfrn:relocate');
2266                 foreach ($relocations as $relocation) {
2267                         self::processRelocation($xpath, $relocation, $importer);
2268                 }
2269
2270                 if (($importer['uid'] != 0) && !$importer['readonly']) {
2271                         $mails = $xpath->query('/atom:feed/dfrn:mail');
2272                         foreach ($mails as $mail) {
2273                                 self::processMail($xpath, $mail, $importer);
2274                         }
2275
2276                         $suggestions = $xpath->query('/atom:feed/dfrn:suggest');
2277                         foreach ($suggestions as $suggestion) {
2278                                 self::processSuggestion($xpath, $suggestion, $importer);
2279                         }
2280                 }
2281
2282                 $deletions = $xpath->query('/atom:feed/at:deleted-entry');
2283                 if (!empty($deletions)) {
2284                         foreach ($deletions as $deletion) {
2285                                 self::processDeletion($xpath, $deletion, $importer);
2286                         }
2287                         if (count($deletions) > 0) {
2288                                 Logger::notice(count($deletions) . ' deletions had been processed');
2289                                 return 200;
2290                         }
2291                 }
2292
2293                 $entries = $xpath->query('/atom:feed/atom:entry');
2294                 foreach ($entries as $entry) {
2295                         self::processEntry($header, $xpath, $entry, $importer, $xml, $protocol);
2296                 }
2297
2298                 Logger::info("Import done for user " . $importer['importer_uid'] . " from contact " . $importer['id']);
2299                 return 200;
2300         }
2301
2302         /**
2303          * Returns the activity verb
2304          *
2305          * @param array $item Item array
2306          *
2307          * @return string activity verb
2308          */
2309         private static function constructVerb(array $item): string
2310         {
2311                 if ($item['verb']) {
2312                         return $item['verb'];
2313                 }
2314                 return Activity::POST;
2315         }
2316
2317         /**
2318          * This function returns true if $update has an edited timestamp newer
2319          * than $existing, i.e. $update contains new data which should override
2320          * what's already there.  If there is no timestamp yet, the update is
2321          * assumed to be newer.  If the update has no timestamp, the existing
2322          * item is assumed to be up-to-date.  If the timestamps are equal it
2323          * assumes the update has been seen before and should be ignored.
2324          *
2325          * @param array $existing
2326          * @param array $update
2327          * @return bool
2328          * @throws \Exception
2329          */
2330         private static function isEditedTimestampNewer(array $existing, array $update): bool
2331         {
2332                 if (empty($existing['edited'])) {
2333                         return true;
2334                 }
2335                 if (empty($update['edited'])) {
2336                         return false;
2337                 }
2338
2339                 $existing_edited = DateTimeFormat::utc($existing['edited']);
2340                 $update_edited = DateTimeFormat::utc($update['edited']);
2341
2342                 return (strcmp($existing_edited, $update_edited) < 0);
2343         }
2344
2345         /**
2346          * Checks if the given contact url does support DFRN
2347          *
2348          * @param string  $url    profile url
2349          * @return boolean
2350          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2351          * @throws \ImagickException
2352          */
2353         public static function isSupportedByContactUrl(string $url): bool
2354         {
2355                 $probe = Probe::uri($url, Protocol::DFRN);
2356                 return $probe['network'] == Protocol::DFRN;
2357         }
2358 }