src/Protocol/DFRN.php

   1 <?php
   2 /**
   3  * @file include/dfrn.php
   4  * @brief The implementation of the dfrn protocol
   5  *
   6  * @see https://github.com/friendica/friendica/wiki/Protocol and
   7  * https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
   8  */
   9 namespace Friendica\Protocol;
  10
  11 use DOMDocument;
  12 use DOMXPath;
  13 use Friendica\App;
  14 use Friendica\Content\OEmbed;
  15 use Friendica\Content\Text\BBCode;
  16 use Friendica\Content\Text\HTML;
  17 use Friendica\Core\Config;
  18 use Friendica\Core\Hook;
  19 use Friendica\Core\Logger;
  20 use Friendica\Core\Protocol;
  21 use Friendica\Core\System;
  22 use Friendica\Database\DBA;
  23 use Friendica\Model\Contact;
  24 use Friendica\Model\Conversation;
  25 use Friendica\Model\Event;
  26 use Friendica\Model\GContact;
  27 use Friendica\Model\Item;
  28 use Friendica\Model\PermissionSet;
  29 use Friendica\Model\Profile;
  30 use Friendica\Model\User;
  31 use Friendica\Object\Image;
  32 use Friendica\Util\Crypto;
  33 use Friendica\Util\DateTimeFormat;
  34 use Friendica\Util\Network;
  35 use Friendica\Util\Strings;
  36 use Friendica\Util\XML;
  37 use HTMLPurifier;
  38 use HTMLPurifier_Config;
  39
  40 /**
  41  * @brief This class contain functions to create and send DFRN XML files
  42  */
  43 class DFRN
  44 {
  45
  46         const TOP_LEVEL = 0;    // Top level posting
  47         const REPLY = 1;                // Regular reply that is stored locally
  48         const REPLY_RC = 2;     // Reply that will be relayed
  49
  50         /**
  51          * @brief Generates an array of contact and user for DFRN imports
  52          *
  53          * This array contains not only the receiver but also the sender of the message.
  54          *
  55          * @param integer $cid Contact id
  56          * @param integer $uid User id
  57          *
  58          * @return array importer
  59          * @throws \Exception
  60          */
  61         public static function getImporter($cid, $uid = 0)
  62         {
  63                 $condition = ['id' => $cid, 'blocked' => false, 'pending' => false];
  64                 $contact = DBA::selectFirst('contact', [], $condition);
  65                 if (!DBA::isResult($contact)) {
  66                         return [];
  67                 }
  68
  69                 $contact['cpubkey'] = $contact['pubkey'];
  70                 $contact['cprvkey'] = $contact['prvkey'];
  71                 $contact['senderName'] = $contact['name'];
  72
  73                 if ($uid != 0) {
  74                         $condition = ['uid' => $uid, 'account_expired' => false, 'account_removed' => false];
  75                         $user = DBA::selectFirst('user', [], $condition);
  76                         if (!DBA::isResult($user)) {
  77                                 return [];
  78                         }
  79
  80                         $user['importer_uid'] = $user['uid'];
  81                         $user['uprvkey'] = $user['prvkey'];
  82                 } else {
  83                         $user = ['importer_uid' => 0, 'uprvkey' => '', 'timezone' => 'UTC',
  84                                 'nickname' => '', 'sprvkey' => '', 'spubkey' => '',
  85                                 'page-flags' => 0, 'account-type' => 0, 'prvnets' => 0];
  86                 }
  87
  88                 return array_merge($contact, $user);
  89         }
  90
  91         /**
  92          * @brief Generates the atom entries for delivery.php
  93          *
  94          * This function is used whenever content is transmitted via DFRN.
  95          *
  96          * @param array $items Item elements
  97          * @param array $owner Owner record
  98          *
  99          * @return string DFRN entries
 100          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 101          * @throws \ImagickException
 102          * @todo  Find proper type-hints
 103          */
 104         public static function entries($items, $owner)
 105         {
 106                 $doc = new DOMDocument('1.0', 'utf-8');
 107                 $doc->formatOutput = true;
 108
 109                 $root = self::addHeader($doc, $owner, "dfrn:owner", "", false);
 110
 111                 if (! count($items)) {
 112                         return trim($doc->saveXML());
 113                 }
 114
 115                 foreach ($items as $item) {
 116                         // These values aren't sent when sending from the queue.
 117                         /// @todo Check if we can set these values from the queue or if they are needed at all.
 118                         $item["entry:comment-allow"] = defaults($item, "entry:comment-allow", true);
 119                         $item["entry:cid"] = defaults($item, "entry:cid", 0);
 120
 121                         $entry = self::entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
 122                         $root->appendChild($entry);
 123                 }
 124
 125                 return trim($doc->saveXML());
 126         }
 127
 128         /**
 129          * @brief Generate an atom feed for the given user
 130          *
 131          * This function is called when another server is pulling data from the user feed.
 132          *
 133          * @param string  $dfrn_id     DFRN ID from the requesting party
 134          * @param string  $owner_nick  Owner nick name
 135          * @param string  $last_update Date of the last update
 136          * @param int     $direction   Can be -1, 0 or 1.
 137          * @param boolean $onlyheader  Output only the header without content? (Default is "no")
 138          *
 139          * @return string DFRN feed entries
 140          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 141          * @throws \ImagickException
 142          */
 143         public static function feed($dfrn_id, $owner_nick, $last_update, $direction = 0, $onlyheader = false)
 144         {
 145                 $a = \get_app();
 146
 147                 $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
 148                 $public_feed = (($dfrn_id) ? false : true);
 149                 $starred     = false;   // not yet implemented, possible security issues
 150                 $converse    = false;
 151
 152                 if ($public_feed && $a->argc > 2) {
 153                         for ($x = 2; $x < $a->argc; $x++) {
 154                                 if ($a->argv[$x] == 'converse') {
 155                                         $converse = true;
 156                                 }
 157                                 if ($a->argv[$x] == 'starred') {
 158                                         $starred = true;
 159                                 }
 160                                 if ($a->argv[$x] == 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1])) {
 161                                         $category = $a->argv[$x+1];
 162                                 }
 163                         }
 164                 }
 165
 166                 // default permissions - anonymous user
 167
 168                 $sql_extra = " AND NOT `item`.`private` ";
 169
 170                 $r = q(
 171                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 172                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 173                         WHERE `contact`.`self` AND `user`.`nickname` = '%s' LIMIT 1",
 174                         DBA::escape($owner_nick)
 175                 );
 176
 177                 if (! DBA::isResult($r)) {
 178                         Logger::log(sprintf('No contact found for nickname=%d', $owner_nick), Logger::WARNING);
 179                         exit();
 180                 }
 181
 182                 $owner = $r[0];
 183                 $owner_id = $owner['uid'];
 184
 185                 $sql_post_table = "";
 186
 187                 if (! $public_feed) {
 188                         switch ($direction) {
 189                                 case (-1):
 190                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", DBA::escape($dfrn_id));
 191                                         break;
 192                                 case 0:
 193                                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", DBA::escape($dfrn_id));
 194                                         break;
 195                                 case 1:
 196                                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", DBA::escape($dfrn_id));
 197                                         break;
 198                                 default:
 199                                         return false;
 200                                         break; // NOTREACHED
 201                         }
 202
 203                         $r = q(
 204                                 "SELECT * FROM `contact` WHERE NOT `blocked` AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 205                                 intval($owner_id)
 206                         );
 207
 208                         if (! DBA::isResult($r)) {
 209                                 Logger::log(sprintf('No contact found for uid=%d', $owner_id), Logger::WARNING);
 210                                 exit();
 211                         }
 212
 213                         $contact = $r[0];
 214
 215                         $set = PermissionSet::get($owner_id, $contact['id']);
 216
 217                         if (!empty($set)) {
 218                                 $sql_extra = " AND `item`.`psid` IN (" . implode(',', $set) .")";
 219                         } else {
 220                                 $sql_extra = " AND NOT `item`.`private`";
 221                         }
 222                 }
 223
 224                 if ($public_feed) {
 225                         $sort = 'DESC';
 226                 } else {
 227                         $sort = 'ASC';
 228                 }
 229
 230                 if (! strlen($last_update)) {
 231                         $last_update = 'now -30 days';
 232                 }
 233
 234                 if (isset($category)) {
 235                         $sql_post_table = sprintf(
 236                                 "INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 237                                 DBA::escape(Strings::protectSprintf($category)),
 238                                 intval(TERM_OBJ_POST),
 239                                 intval(TERM_CATEGORY),
 240                                 intval($owner_id)
 241                         );
 242                 }
 243
 244                 if ($public_feed && ! $converse) {
 245                         $sql_extra .= " AND `contact`.`self` = 1 ";
 246                 }
 247
 248                 $check_date = DateTimeFormat::utc($last_update);
 249
 250                 $r = q(
 251                         "SELECT `item`.`id`
 252                         FROM `item` USE INDEX (`uid_wall_changed`) $sql_post_table
 253                         STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 254                         WHERE `item`.`uid` = %d AND `item`.`wall` AND `item`.`changed` > '%s'
 255                         $sql_extra
 256                         ORDER BY `item`.`parent` ".$sort.", `item`.`created` ASC LIMIT 0, 300",
 257                         intval($owner_id),
 258                         DBA::escape($check_date),
 259                         DBA::escape($sort)
 260                 );
 261
 262                 $ids = [];
 263                 foreach ($r as $item) {
 264                         $ids[] = $item['id'];
 265                 }
 266
 267                 if (!empty($ids)) {
 268                         $ret = Item::select(Item::DELIVER_FIELDLIST, ['id' => $ids]);
 269                         $items = Item::inArray($ret);
 270                 } else {
 271                         $items = [];
 272                 }
 273
 274                 /*
 275                  * Will check further below if this actually returned results.
 276                  * We will provide an empty feed if that is the case.
 277                  */
 278
 279                 $doc = new DOMDocument('1.0', 'utf-8');
 280                 $doc->formatOutput = true;
 281
 282                 $alternatelink = $owner['url'];
 283
 284                 if (isset($category)) {
 285                         $alternatelink .= "/category/".$category;
 286                 }
 287
 288                 if ($public_feed) {
 289                         $author = "dfrn:owner";
 290                 } else {
 291                         $author = "author";
 292                 }
 293
 294                 $root = self::addHeader($doc, $owner, $author, $alternatelink, true);
 295
 296                 /// @TODO This hook can't work anymore
 297                 //      \Friendica\Core\Hook::callAll('atom_feed', $atom);
 298
 299                 if (!DBA::isResult($items) || $onlyheader) {
 300                         $atom = trim($doc->saveXML());
 301
 302                         Hook::callAll('atom_feed_end', $atom);
 303
 304                         return $atom;
 305                 }
 306
 307                 foreach ($items as $item) {
 308                         // prevent private email from leaking.
 309                         if ($item['network'] == Protocol::MAIL) {
 310                                 continue;
 311                         }
 312
 313                         // public feeds get html, our own nodes use bbcode
 314
 315                         if ($public_feed) {
 316                                 $type = 'html';
 317                                 // catch any email that's in a public conversation and make sure it doesn't leak
 318                                 if ($item['private']) {
 319                                         continue;
 320                                 }
 321                         } else {
 322                                 $type = 'text';
 323                         }
 324
 325                         $entry = self::entry($doc, $type, $item, $owner, true);
 326                         $root->appendChild($entry);
 327                 }
 328
 329                 $atom = trim($doc->saveXML());
 330
 331                 Hook::callAll('atom_feed_end', $atom);
 332
 333                 return $atom;
 334         }
 335
 336         /**
 337          * @brief Generate an atom entry for a given item id
 338          *
 339          * @param int     $item_id      The item id
 340          * @param boolean $conversation Show the conversation. If false show the single post.
 341          *
 342          * @return string DFRN feed entry
 343          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 344          * @throws \ImagickException
 345          */
 346         public static function itemFeed($item_id, $conversation = false)
 347         {
 348                 if ($conversation) {
 349                         $condition = ['parent' => $item_id];
 350                 } else {
 351                         $condition = ['id' => $item_id];
 352                 }
 353
 354                 $ret = Item::select(Item::DELIVER_FIELDLIST, $condition);
 355                 $items = Item::inArray($ret);
 356                 if (!DBA::isResult($items)) {
 357                         exit();
 358                 }
 359
 360                 $item = $items[0];
 361
 362                 if ($item['uid'] != 0) {
 363                         $owner = User::getOwnerDataById($item['uid']);
 364                         if (!$owner) {
 365                                 exit();
 366                         }
 367                 } else {
 368                         $owner = ['uid' => 0, 'nick' => 'feed-item'];
 369                 }
 370
 371                 $doc = new DOMDocument('1.0', 'utf-8');
 372                 $doc->formatOutput = true;
 373                 $type = 'html';
 374
 375                 if ($conversation) {
 376                         $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 377                         $doc->appendChild($root);
 378
 379                         $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 380                         $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 381                         $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 382                         $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 383                         $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 384                         $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 385                         $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 386                         $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 387                         $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 388
 389                         //$root = self::addHeader($doc, $owner, "dfrn:owner", "", false);
 390
 391                         foreach ($items as $item) {
 392                                 $entry = self::entry($doc, $type, $item, $owner, true, 0);
 393                                 $root->appendChild($entry);
 394                         }
 395                 } else {
 396                         $root = self::entry($doc, $type, $item, $owner, true, 0, true);
 397                 }
 398
 399                 $atom = trim($doc->saveXML());
 400                 return $atom;
 401         }
 402
 403         /**
 404          * @brief Create XML text for DFRN mails
 405          *
 406          * @param array $item  message elements
 407          * @param array $owner Owner record
 408          *
 409          * @return string DFRN mail
 410          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 411          * @todo  Find proper type-hints
 412          */
 413         public static function mail($item, $owner)
 414         {
 415                 $doc = new DOMDocument('1.0', 'utf-8');
 416                 $doc->formatOutput = true;
 417
 418                 $root = self::addHeader($doc, $owner, "dfrn:owner", "", false);
 419
 420                 $mail = $doc->createElement("dfrn:mail");
 421                 $sender = $doc->createElement("dfrn:sender");
 422
 423                 XML::addElement($doc, $sender, "dfrn:name", $owner['name']);
 424                 XML::addElement($doc, $sender, "dfrn:uri", $owner['url']);
 425                 XML::addElement($doc, $sender, "dfrn:avatar", $owner['thumb']);
 426
 427                 $mail->appendChild($sender);
 428
 429                 XML::addElement($doc, $mail, "dfrn:id", $item['uri']);
 430                 XML::addElement($doc, $mail, "dfrn:in-reply-to", $item['parent-uri']);
 431                 XML::addElement($doc, $mail, "dfrn:sentdate", DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM));
 432                 XML::addElement($doc, $mail, "dfrn:subject", $item['title']);
 433                 XML::addElement($doc, $mail, "dfrn:content", $item['body']);
 434
 435                 $root->appendChild($mail);
 436
 437                 return trim($doc->saveXML());
 438         }
 439
 440         /**
 441          * @brief Create XML text for DFRN friend suggestions
 442          *
 443          * @param array $item  suggestion elements
 444          * @param array $owner Owner record
 445          *
 446          * @return string DFRN suggestions
 447          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 448          * @todo  Find proper type-hints
 449          */
 450         public static function fsuggest($item, $owner)
 451         {
 452                 $doc = new DOMDocument('1.0', 'utf-8');
 453                 $doc->formatOutput = true;
 454
 455                 $root = self::addHeader($doc, $owner, "dfrn:owner", "", false);
 456
 457                 $suggest = $doc->createElement("dfrn:suggest");
 458
 459                 XML::addElement($doc, $suggest, "dfrn:url", $item['url']);
 460                 XML::addElement($doc, $suggest, "dfrn:name", $item['name']);
 461                 XML::addElement($doc, $suggest, "dfrn:photo", $item['photo']);
 462                 XML::addElement($doc, $suggest, "dfrn:request", $item['request']);
 463                 XML::addElement($doc, $suggest, "dfrn:note", $item['note']);
 464
 465                 $root->appendChild($suggest);
 466
 467                 return trim($doc->saveXML());
 468         }
 469
 470         /**
 471          * @brief Create XML text for DFRN relocations
 472          *
 473          * @param array $owner Owner record
 474          * @param int   $uid   User ID
 475          *
 476          * @return string DFRN relocations
 477          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 478          * @todo  Find proper type-hints
 479          */
 480         public static function relocate($owner, $uid)
 481         {
 482
 483                 /* get site pubkey. this could be a new installation with no site keys*/
 484                 $pubkey = Config::get('system', 'site_pubkey');
 485                 if (! $pubkey) {
 486                         $res = Crypto::newKeypair(1024);
 487                         Config::set('system', 'site_prvkey', $res['prvkey']);
 488                         Config::set('system', 'site_pubkey', $res['pubkey']);
 489                 }
 490
 491                 $rp = q(
 492                         "SELECT `resource-id` , `scale`, type FROM `photo`
 493                                 WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;",
 494                         $uid
 495                 );
 496                 $photos = [];
 497                 $ext = Image::supportedTypes();
 498
 499                 foreach ($rp as $p) {
 500                         $photos[$p['scale']] = System::baseUrl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 501                 }
 502
 503
 504                 $doc = new DOMDocument('1.0', 'utf-8');
 505                 $doc->formatOutput = true;
 506
 507                 $root = self::addHeader($doc, $owner, "dfrn:owner", "", false);
 508
 509                 $relocate = $doc->createElement("dfrn:relocate");
 510
 511                 XML::addElement($doc, $relocate, "dfrn:url", $owner['url']);
 512                 XML::addElement($doc, $relocate, "dfrn:name", $owner['name']);
 513                 XML::addElement($doc, $relocate, "dfrn:addr", $owner['addr']);
 514                 XML::addElement($doc, $relocate, "dfrn:avatar", $owner['avatar']);
 515                 XML::addElement($doc, $relocate, "dfrn:photo", $photos[4]);
 516                 XML::addElement($doc, $relocate, "dfrn:thumb", $photos[5]);
 517                 XML::addElement($doc, $relocate, "dfrn:micro", $photos[6]);
 518                 XML::addElement($doc, $relocate, "dfrn:request", $owner['request']);
 519                 XML::addElement($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 520                 XML::addElement($doc, $relocate, "dfrn:notify", $owner['notify']);
 521                 XML::addElement($doc, $relocate, "dfrn:poll", $owner['poll']);
 522                 XML::addElement($doc, $relocate, "dfrn:sitepubkey", Config::get('system', 'site_pubkey'));
 523
 524                 $root->appendChild($relocate);
 525
 526                 return trim($doc->saveXML());
 527         }
 528
 529         /**
 530          * @brief Adds the header elements for the DFRN protocol
 531          *
 532          * @param DOMDocument $doc           XML document
 533          * @param array       $owner         Owner record
 534          * @param string      $authorelement Element name for the author
 535          * @param string      $alternatelink link to profile or category
 536          * @param bool        $public        Is it a header for public posts?
 537          *
 538          * @return object XML root object
 539          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 540          * @todo  Find proper type-hints
 541          */
 542         private static function addHeader(DOMDocument $doc, $owner, $authorelement, $alternatelink = "", $public = false)
 543         {
 544
 545                 if ($alternatelink == "") {
 546                         $alternatelink = $owner['url'];
 547                 }
 548
 549                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 550                 $doc->appendChild($root);
 551
 552                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 553                 $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 554                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 555                 $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 556                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 557                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 558                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 559                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 560                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 561
 562                 XML::addElement($doc, $root, "id", System::baseUrl()."/profile/".$owner["nick"]);
 563                 XML::addElement($doc, $root, "title", $owner["name"]);
 564
 565                 $attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION];
 566                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 567
 568                 $attributes = ["rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/"];
 569                 XML::addElement($doc, $root, "link", "", $attributes);
 570
 571                 $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $alternatelink];
 572                 XML::addElement($doc, $root, "link", "", $attributes);
 573
 574
 575                 if ($public) {
 576                         // DFRN itself doesn't uses this. But maybe someone else wants to subscribe to the public feed.
 577                         OStatus::hublinks($doc, $root, $owner["nick"]);
 578
 579                         $attributes = ["rel" => "salmon", "href" => System::baseUrl()."/salmon/".$owner["nick"]];
 580                         XML::addElement($doc, $root, "link", "", $attributes);
 581
 582                         $attributes = ["rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => System::baseUrl()."/salmon/".$owner["nick"]];
 583                         XML::addElement($doc, $root, "link", "", $attributes);
 584
 585                         $attributes = ["rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => System::baseUrl()."/salmon/".$owner["nick"]];
 586                         XML::addElement($doc, $root, "link", "", $attributes);
 587                 }
 588
 589                 // For backward compatibility we keep this element
 590                 if ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY) {
 591                         XML::addElement($doc, $root, "dfrn:community", 1);
 592                 }
 593
 594                 // The former element is replaced by this one
 595                 XML::addElement($doc, $root, "dfrn:account_type", $owner["account-type"]);
 596
 597                 /// @todo We need a way to transmit the different page flags like "User::PAGE_FLAGS_PRVGROUP"
 598
 599                 XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
 600
 601                 $author = self::addAuthor($doc, $owner, $authorelement, $public);
 602                 $root->appendChild($author);
 603
 604                 return $root;
 605         }
 606
 607         /**
 608          * @brief Adds the author element in the header for the DFRN protocol
 609          *
 610          * @param DOMDocument $doc           XML document
 611          * @param array       $owner         Owner record
 612          * @param string      $authorelement Element name for the author
 613          * @param boolean     $public        boolean
 614          *
 615          * @return \DOMElement XML author object
 616          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 617          * @todo  Find proper type-hints
 618          */
 619         private static function addAuthor(DOMDocument $doc, array $owner, $authorelement, $public)
 620         {
 621                 // Is the profile hidden or shouldn't be published in the net? Then add the "hide" element
 622                 $r = q(
 623                         "SELECT `id` FROM `profile` INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 624                                 WHERE (`hidewall` OR NOT `net-publish`) AND `user`.`uid` = %d",
 625                         intval($owner['uid'])
 626                 );
 627                 if (DBA::isResult($r)) {
 628                         $hidewall = true;
 629                 } else {
 630                         $hidewall = false;
 631                 }
 632
 633                 $author = $doc->createElement($authorelement);
 634
 635                 $namdate = DateTimeFormat::utc($owner['name-date'].'+00:00', DateTimeFormat::ATOM);
 636                 $uridate = DateTimeFormat::utc($owner['uri-date'].'+00:00', DateTimeFormat::ATOM);
 637                 $picdate = DateTimeFormat::utc($owner['avatar-date'].'+00:00', DateTimeFormat::ATOM);
 638
 639                 $attributes = [];
 640
 641                 if (!$public || !$hidewall) {
 642                         $attributes = ["dfrn:updated" => $namdate];
 643                 }
 644
 645                 XML::addElement($doc, $author, "name", $owner["name"], $attributes);
 646                 XML::addElement($doc, $author, "uri", System::baseUrl().'/profile/'.$owner["nickname"], $attributes);
 647                 XML::addElement($doc, $author, "dfrn:handle", $owner["addr"], $attributes);
 648
 649                 $attributes = ["rel" => "photo", "type" => "image/jpeg",
 650                                         "media:width" => 300, "media:height" => 300, "href" => $owner['photo']];
 651
 652                 if (!$public || !$hidewall) {
 653                         $attributes["dfrn:updated"] = $picdate;
 654                 }
 655
 656                 XML::addElement($doc, $author, "link", "", $attributes);
 657
 658                 $attributes["rel"] = "avatar";
 659                 XML::addElement($doc, $author, "link", "", $attributes);
 660
 661                 if ($hidewall) {
 662                         XML::addElement($doc, $author, "dfrn:hide", "true");
 663                 }
 664
 665                 // The following fields will only be generated if the data isn't meant for a public feed
 666                 if ($public) {
 667                         return $author;
 668                 }
 669
 670                 $birthday = feed_birthday($owner['uid'], $owner['timezone']);
 671
 672                 if ($birthday) {
 673                         XML::addElement($doc, $author, "dfrn:birthday", $birthday);
 674                 }
 675
 676                 // Only show contact details when we are allowed to
 677                 $r = q(
 678                         "SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`,
 679                                 `user`.`timezone`, `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
 680                                 `profile`.`pub_keywords`, `profile`.`xmpp`, `profile`.`dob`
 681                         FROM `profile`
 682                                 INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 683                                 WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 684                         intval($owner['uid'])
 685                 );
 686                 if (DBA::isResult($r)) {
 687                         $profile = $r[0];
 688
 689                         XML::addElement($doc, $author, "poco:displayName", $profile["name"]);
 690                         XML::addElement($doc, $author, "poco:updated", $namdate);
 691
 692                         if (trim($profile["dob"]) > DBA::NULL_DATE) {
 693                                 XML::addElement($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 694                         }
 695
 696                         XML::addElement($doc, $author, "poco:note", $profile["about"]);
 697                         XML::addElement($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 698
 699                         $savetz = date_default_timezone_get();
 700                         date_default_timezone_set($profile["timezone"]);
 701                         XML::addElement($doc, $author, "poco:utcOffset", date("P"));
 702                         date_default_timezone_set($savetz);
 703
 704                         if (trim($profile["homepage"]) != "") {
 705                                 $urls = $doc->createElement("poco:urls");
 706                                 XML::addElement($doc, $urls, "poco:type", "homepage");
 707                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
 708                                 XML::addElement($doc, $urls, "poco:primary", "true");
 709                                 $author->appendChild($urls);
 710                         }
 711
 712                         if (trim($profile["pub_keywords"]) != "") {
 713                                 $keywords = explode(",", $profile["pub_keywords"]);
 714
 715                                 foreach ($keywords as $keyword) {
 716                                         XML::addElement($doc, $author, "poco:tags", trim($keyword));
 717                                 }
 718                         }
 719
 720                         if (trim($profile["xmpp"]) != "") {
 721                                 $ims = $doc->createElement("poco:ims");
 722                                 XML::addElement($doc, $ims, "poco:type", "xmpp");
 723                                 XML::addElement($doc, $ims, "poco:value", $profile["xmpp"]);
 724                                 XML::addElement($doc, $ims, "poco:primary", "true");
 725                                 $author->appendChild($ims);
 726                         }
 727
 728                         if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 729                                 $element = $doc->createElement("poco:address");
 730
 731                                 XML::addElement($doc, $element, "poco:formatted", Profile::formatLocation($profile));
 732
 733                                 if (trim($profile["locality"]) != "") {
 734                                         XML::addElement($doc, $element, "poco:locality", $profile["locality"]);
 735                                 }
 736
 737                                 if (trim($profile["region"]) != "") {
 738                                         XML::addElement($doc, $element, "poco:region", $profile["region"]);
 739                                 }
 740
 741                                 if (trim($profile["country-name"]) != "") {
 742                                         XML::addElement($doc, $element, "poco:country", $profile["country-name"]);
 743                                 }
 744
 745                                 $author->appendChild($element);
 746                         }
 747                 }
 748
 749                 return $author;
 750         }
 751
 752         /**
 753          * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 754          *
 755          * @param DOMDocument $doc         XML document
 756          * @param string $element     Element name for the author
 757          * @param string $contact_url Link of the contact
 758          * @param array  $item        Item elements
 759          *
 760          * @return \DOMElement XML author object
 761          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 762          * @todo  Find proper type-hints
 763          */
 764         private static function addEntryAuthor(DOMDocument $doc, $element, $contact_url, $item)
 765         {
 766                 $contact = Contact::getDetailsByURL($contact_url, $item["uid"]);
 767
 768                 $author = $doc->createElement($element);
 769                 XML::addElement($doc, $author, "name", $contact["name"]);
 770                 XML::addElement($doc, $author, "uri", $contact["url"]);
 771                 XML::addElement($doc, $author, "dfrn:handle", $contact["addr"]);
 772
 773                 /// @Todo
 774                 /// - Check real image type and image size
 775                 /// - Check which of these boths elements we should use
 776                 $attributes = [
 777                                 "rel" => "photo",
 778                                 "type" => "image/jpeg",
 779                                 "media:width" => 80,
 780                                 "media:height" => 80,
 781                                 "href" => $contact["photo"]];
 782                 XML::addElement($doc, $author, "link", "", $attributes);
 783
 784                 $attributes = [
 785                                 "rel" => "avatar",
 786                                 "type" => "image/jpeg",
 787                                 "media:width" => 80,
 788                                 "media:height" => 80,
 789                                 "href" => $contact["photo"]];
 790                 XML::addElement($doc, $author, "link", "", $attributes);
 791
 792                 return $author;
 793         }
 794
 795         /**
 796          * @brief Adds the activity elements
 797          *
 798          * @param DOMDocument $doc      XML document
 799          * @param string      $element  Element name for the activity
 800          * @param string      $activity activity value
 801          *
 802          * @return \DOMElement XML activity object
 803          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 804          * @todo  Find proper type-hints
 805          */
 806         private static function createActivity(DOMDocument $doc, $element, $activity)
 807         {
 808                 if ($activity) {
 809                         $entry = $doc->createElement($element);
 810
 811                         $r = XML::parseString($activity, false);
 812                         if (!$r) {
 813                                 return false;
 814                         }
 815
 816                         if ($r->type) {
 817                                 XML::addElement($doc, $entry, "activity:object-type", $r->type);
 818                         }
 819
 820                         if ($r->id) {
 821                                 XML::addElement($doc, $entry, "id", $r->id);
 822                         }
 823
 824                         if ($r->title) {
 825                                 XML::addElement($doc, $entry, "title", $r->title);
 826                         }
 827
 828                         if ($r->link) {
 829                                 if (substr($r->link, 0, 1) == '<') {
 830                                         if (strstr($r->link, '&') && (! strstr($r->link, '&amp;'))) {
 831                                                 $r->link = str_replace('&', '&amp;', $r->link);
 832                                         }
 833
 834                                         $r->link = preg_replace('/\<link(.*?)\"\>/', '<link$1"/>', $r->link);
 835
 836                                         // XML does need a single element as root element so we add a dummy element here
 837                                         $data = XML::parseString("<dummy>" . $r->link . "</dummy>", false);
 838                                         if (is_object($data)) {
 839                                                 foreach ($data->link as $link) {
 840                                                         $attributes = [];
 841                                                         foreach ($link->attributes() as $parameter => $value) {
 842                                                                 $attributes[$parameter] = $value;
 843                                                         }
 844                                                         XML::addElement($doc, $entry, "link", "", $attributes);
 845                                                 }
 846                                         }
 847                                 } else {
 848                                         $attributes = ["rel" => "alternate", "type" => "text/html", "href" => $r->link];
 849                                         XML::addElement($doc, $entry, "link", "", $attributes);
 850                                 }
 851                         }
 852                         if ($r->content) {
 853                                 XML::addElement($doc, $entry, "content", BBCode::convert($r->content), ["type" => "html"]);
 854                         }
 855
 856                         return $entry;
 857                 }
 858
 859                 return false;
 860         }
 861
 862         /**
 863          * @brief Adds the elements for attachments
 864          *
 865          * @param object $doc  XML document
 866          * @param object $root XML root
 867          * @param array  $item Item element
 868          *
 869          * @return void XML attachment object
 870          * @todo  Find proper type-hints
 871          */
 872         private static function getAttachment($doc, $root, $item)
 873         {
 874                 $arr = explode('[/attach],', $item['attach']);
 875                 if (count($arr)) {
 876                         foreach ($arr as $r) {
 877                                 $matches = false;
 878                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
 879                                 if ($cnt) {
 880                                         $attributes = ["rel" => "enclosure",
 881                                                         "href" => $matches[1],
 882                                                         "type" => $matches[3]];
 883
 884                                         if (intval($matches[2])) {
 885                                                 $attributes["length"] = intval($matches[2]);
 886                                         }
 887
 888                                         if (trim($matches[4]) != "") {
 889                                                 $attributes["title"] = trim($matches[4]);
 890                                         }
 891
 892                                         XML::addElement($doc, $root, "link", "", $attributes);
 893                                 }
 894                         }
 895                 }
 896         }
 897
 898         /**
 899          * @brief Adds the "entry" elements for the DFRN protocol
 900          *
 901          * @param DOMDocument $doc     XML document
 902          * @param string      $type    "text" or "html"
 903          * @param array       $item    Item element
 904          * @param array       $owner   Owner record
 905          * @param bool        $comment Trigger the sending of the "comment" element
 906          * @param int         $cid     Contact ID of the recipient
 907          * @param bool        $single  If set, the entry is created as an XML document with a single "entry" element
 908          *
 909          * @return \DOMElement XML entry object
 910          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 911          * @throws \ImagickException
 912          * @todo  Find proper type-hints
 913          */
 914         private static function entry(DOMDocument $doc, $type, array $item, array $owner, $comment = false, $cid = 0, $single = false)
 915         {
 916                 $mentioned = [];
 917
 918                 if (!$item['parent']) {
 919                         return;
 920                 }
 921
 922                 if ($item['deleted']) {
 923                         $attributes = ["ref" => $item['uri'], "when" => DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM)];
 924                         return XML::createElement($doc, "at:deleted-entry", "", $attributes);
 925                 }
 926
 927                 if (!$single) {
 928                         $entry = $doc->createElement("entry");
 929                 } else {
 930                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, 'entry');
 931                         $doc->appendChild($entry);
 932
 933                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 934                         $entry->setAttribute("xmlns:at", NAMESPACE_TOMB);
 935                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 936                         $entry->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 937                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 938                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 939                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
 940                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 941                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 942                 }
 943
 944                 if ($item['private']) {
 945                         $body = Item::fixPrivatePhotos($item['body'], $owner['uid'], $item, $cid);
 946                 } else {
 947                         $body = $item['body'];
 948                 }
 949
 950                 // Remove the abstract element. It is only locally important.
 951                 $body = BBCode::stripAbstract($body);
 952
 953                 $htmlbody = '';
 954                 if ($type == 'html') {
 955                         $htmlbody = $body;
 956
 957                         if ($item['title'] != "") {
 958                                 $htmlbody = "[b]" . $item['title'] . "[/b]\n\n" . $htmlbody;
 959                         }
 960
 961                         $htmlbody = BBCode::convert($htmlbody, false, 7);
 962                 }
 963
 964                 $author = self::addEntryAuthor($doc, "author", $item["author-link"], $item);
 965                 $entry->appendChild($author);
 966
 967                 $dfrnowner = self::addEntryAuthor($doc, "dfrn:owner", $item["owner-link"], $item);
 968                 $entry->appendChild($dfrnowner);
 969
 970                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 971                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 972                         $parent = Item::selectFirst(['guid', 'plink'], ['uri' => $parent_item, 'uid' => $item['uid']]);
 973                         $attributes = ["ref" => $parent_item, "type" => "text/html",
 974                                                 "href" => $parent['plink'],
 975                                                 "dfrn:diaspora_guid" => $parent['guid']];
 976                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
 977                 }
 978
 979                 // Add conversation data. This is used for OStatus
 980                 $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
 981                 $conversation_uri = $conversation_href;
 982
 983                 if (isset($parent_item)) {
 984                         $conversation = DBA::selectFirst('conversation', ['conversation-uri', 'conversation-href'], ['item-uri' => $item['parent-uri']]);
 985                         if (DBA::isResult($conversation)) {
 986                                 if ($conversation['conversation-uri'] != '') {
 987                                         $conversation_uri = $conversation['conversation-uri'];
 988                                 }
 989                                 if ($conversation['conversation-href'] != '') {
 990                                         $conversation_href = $conversation['conversation-href'];
 991                                 }
 992                         }
 993                 }
 994
 995                 $attributes = [
 996                                 "href" => $conversation_href,
 997                                 "ref" => $conversation_uri];
 998
 999                 XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
1000
1001                 XML::addElement($doc, $entry, "id", $item["uri"]);
1002                 XML::addElement($doc, $entry, "title", $item["title"]);
1003
1004                 XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"] . "+00:00", DateTimeFormat::ATOM));
1005                 XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"] . "+00:00", DateTimeFormat::ATOM));
1006
1007                 // "dfrn:env" is used to read the content
1008                 XML::addElement($doc, $entry, "dfrn:env", Strings::base64UrlEncode($body, true));
1009
1010                 // The "content" field is not read by the receiver. We could remove it when the type is "text"
1011                 // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
1012                 XML::addElement($doc, $entry, "content", (($type == 'html') ? $htmlbody : $body), ["type" => $type]);
1013
1014                 // We save this value in "plink". Maybe we should read it from there as well?
1015                 XML::addElement(
1016                         $doc,
1017                         $entry,
1018                         "link",
1019                         "",
1020                         ["rel" => "alternate", "type" => "text/html",
1021                                  "href" => System::baseUrl() . "/display/" . $item["guid"]]
1022                 );
1023
1024                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
1025                 // It is included in the rewritten code for completeness
1026                 if ($comment) {
1027                         XML::addElement($doc, $entry, "dfrn:comment-allow", 1);
1028                 }
1029
1030                 if ($item['location']) {
1031                         XML::addElement($doc, $entry, "dfrn:location", $item['location']);
1032                 }
1033
1034                 if ($item['coord']) {
1035                         XML::addElement($doc, $entry, "georss:point", $item['coord']);
1036                 }
1037
1038                 if ($item['private']) {
1039                         XML::addElement($doc, $entry, "dfrn:private", ($item['private'] ? $item['private'] : 1));
1040                 }
1041
1042                 if ($item['extid']) {
1043                         XML::addElement($doc, $entry, "dfrn:extid", $item['extid']);
1044                 }
1045
1046                 if ($item['post-type'] == Item::PT_PAGE) {
1047                         XML::addElement($doc, $entry, "dfrn:bookmark", "true");
1048                 }
1049
1050                 if ($item['app']) {
1051                         XML::addElement($doc, $entry, "statusnet:notice_info", "", ["local_id" => $item['id'], "source" => $item['app']]);
1052                 }
1053
1054                 XML::addElement($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
1055
1056                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
1057                 // It is needed for relayed comments to Diaspora.
1058                 if ($item['signed_text']) {
1059                         $sign = base64_encode(json_encode(['signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer']]));
1060                         XML::addElement($doc, $entry, "dfrn:diaspora_signature", $sign);
1061                 }
1062
1063                 XML::addElement($doc, $entry, "activity:verb", self::constructVerb($item));
1064
1065                 if ($item['object-type'] != "") {
1066                         XML::addElement($doc, $entry, "activity:object-type", $item['object-type']);
1067                 } elseif ($item['id'] == $item['parent']) {
1068                         XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1069                 } else {
1070                         XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_COMMENT);
1071                 }
1072
1073                 $actobj = self::createActivity($doc, "activity:object", $item['object']);
1074                 if ($actobj) {
1075                         $entry->appendChild($actobj);
1076                 }
1077
1078                 $actarg = self::createActivity($doc, "activity:target", $item['target']);
1079                 if ($actarg) {
1080                         $entry->appendChild($actarg);
1081                 }
1082
1083                 $tags = Item::getFeedTags($item);
1084
1085                 /// @TODO Combine this with similar below if() block?
1086                 if (count($tags)) {
1087                         foreach ($tags as $t) {
1088                                 if (($type != 'html') || ($t[0] != "@")) {
1089                                         XML::addElement($doc, $entry, "category", "", ["scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]]);
1090                                 }
1091                         }
1092                 }
1093
1094                 if (count($tags)) {
1095                         foreach ($tags as $t) {
1096                                 if ($t[0] == "@") {
1097                                         $mentioned[$t[1]] = $t[1];
1098                                 }
1099                         }
1100                 }
1101
1102                 foreach ($mentioned as $mention) {
1103                         $condition = ['uid' => $owner["uid"], 'nurl' => Strings::normaliseLink($mention)];
1104                         $contact = DBA::selectFirst('contact', ['forum', 'prv'], $condition);
1105
1106                         if (DBA::isResult($contact) && ($contact["forum"] || $contact["prv"])) {
1107                                 XML::addElement(
1108                                         $doc,
1109                                         $entry,
1110                                         "link",
1111                                         "",
1112                                         ["rel" => "mentioned",
1113                                                         "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
1114                                                         "href" => $mention]
1115                                 );
1116                         } else {
1117                                 XML::addElement(
1118                                         $doc,
1119                                         $entry,
1120                                         "link",
1121                                         "",
1122                                         ["rel" => "mentioned",
1123                                                         "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
1124                                                         "href" => $mention]
1125                                 );
1126                         }
1127                 }
1128
1129                 self::getAttachment($doc, $entry, $item);
1130
1131                 return $entry;
1132         }
1133
1134         /**
1135          * @brief encrypts data via AES
1136          *
1137          * @param string $data The data that is to be encrypted
1138          * @param string $key  The AES key
1139          *
1140          * @return string encrypted data
1141          */
1142         private static function aesEncrypt($data, $key)
1143         {
1144                 return openssl_encrypt($data, 'aes-128-ecb', $key, OPENSSL_RAW_DATA);
1145         }
1146
1147         /**
1148          * @brief decrypts data via AES
1149          *
1150          * @param string $encrypted The encrypted data
1151          * @param string $key       The AES key
1152          *
1153          * @return string decrypted data
1154          */
1155         public static function aesDecrypt($encrypted, $key)
1156         {
1157                 return openssl_decrypt($encrypted, 'aes-128-ecb', $key, OPENSSL_RAW_DATA);
1158         }
1159
1160         /**
1161          * @brief Delivers the atom content to the contacts
1162          *
1163          * @param array  $owner    Owner record
1164          * @param array  $contact  Contact record of the receiver
1165          * @param string $atom     Content that will be transmitted
1166          * @param bool   $dissolve (to be documented)
1167          *
1168          * @param bool   $legacy_transport
1169          * @return int Deliver status. Negative values mean an error.
1170          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1171          * @throws \ImagickException
1172          * @todo  Add array type-hint for $owner, $contact
1173          */
1174         public static function deliver($owner, $contact, $atom, $dissolve = false, $legacy_transport = false)
1175         {
1176                 // At first try the Diaspora transport layer
1177                 if (!$dissolve && !$legacy_transport) {
1178                         $curlResult = self::transmit($owner, $contact, $atom);
1179                         if ($curlResult >= 200) {
1180                                 Logger::log('Delivery via Diaspora transport layer was successful with status ' . $curlResult);
1181                                 return $curlResult;
1182                         }
1183                 }
1184
1185                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
1186
1187                 if ($contact['duplex'] && $contact['dfrn-id']) {
1188                         $idtosend = '0:' . $orig_id;
1189                 }
1190                 if ($contact['duplex'] && $contact['issued-id']) {
1191                         $idtosend = '1:' . $orig_id;
1192                 }
1193
1194                 $rino = Config::get('system', 'rino_encrypt');
1195                 $rino = intval($rino);
1196
1197                 Logger::log("Local rino version: ". $rino, Logger::DEBUG);
1198
1199                 $ssl_val = intval(Config::get('system', 'ssl_policy'));
1200
1201                 switch ($ssl_val) {
1202                         case SSL_POLICY_FULL:
1203                                 $ssl_policy = 'full';
1204                                 break;
1205                         case SSL_POLICY_SELFSIGN:
1206                                 $ssl_policy = 'self';
1207                                 break;
1208                         case SSL_POLICY_NONE:
1209                         default:
1210                                 $ssl_policy = 'none';
1211                                 break;
1212                 }
1213
1214                 $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
1215
1216                 Logger::log('dfrn_deliver: ' . $url);
1217
1218                 $curlResult = Network::curl($url);
1219
1220                 if ($curlResult->isTimeout()) {
1221                         Contact::markForArchival($contact);
1222                         return -2; // timed out
1223                 }
1224
1225                 $xml = $curlResult->getBody();
1226
1227                 $curl_stat = $curlResult->getReturnCode();
1228                 if (empty($curl_stat)) {
1229                         Contact::markForArchival($contact);
1230                         return -3; // timed out
1231                 }
1232
1233                 Logger::log('dfrn_deliver: ' . $xml, Logger::DATA);
1234
1235                 if (empty($xml)) {
1236                         Contact::markForArchival($contact);
1237                         return 3;
1238                 }
1239
1240                 if (strpos($xml, '<?xml') === false) {
1241                         Logger::log('dfrn_deliver: no valid XML returned');
1242                         Logger::log('dfrn_deliver: returned XML: ' . $xml, Logger::DATA);
1243                         Contact::markForArchival($contact);
1244                         return 3;
1245                 }
1246
1247                 $res = XML::parseString($xml);
1248
1249                 if (!is_object($res) || (intval($res->status) != 0) || !strlen($res->challenge) || !strlen($res->dfrn_id)) {
1250                         Contact::markForArchival($contact);
1251
1252                         if (empty($res->status)) {
1253                                 $status = 3;
1254                         } else {
1255                                 $status = $res->status;
1256                         }
1257
1258                         return $status;
1259                 }
1260
1261                 $postvars     = [];
1262                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
1263                 $challenge    = hex2bin((string) $res->challenge);
1264                 $perm         = (($res->perm) ? $res->perm : null);
1265                 $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
1266                 $rino_remote_version = intval($res->rino);
1267                 $page         = (($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? 1 : 0);
1268
1269                 Logger::log("Remote rino version: ".$rino_remote_version." for ".$contact["url"], Logger::DEBUG);
1270
1271                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
1272                         $page = 2;
1273                 }
1274
1275                 $final_dfrn_id = '';
1276
1277                 if ($perm) {
1278                         if ((($perm == 'rw') && !intval($contact['writable']))
1279                                 || (($perm == 'r') && intval($contact['writable']))
1280                         ) {
1281                                 DBA::update('contact', ['writable' => ($perm == 'rw')], ['id' => $contact['id']]);
1282
1283                                 $contact['writable'] = (string) 1 - intval($contact['writable']);
1284                         }
1285                 }
1286
1287                 if (($contact['duplex'] && strlen($contact['pubkey']))
1288                         || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY && strlen($contact['pubkey']))
1289                         || ($contact['rel'] == Contact::SHARING && strlen($contact['pubkey']))
1290                 ) {
1291                         openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
1292                         openssl_public_decrypt($challenge, $postvars['challenge'], $contact['pubkey']);
1293                 } else {
1294                         openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
1295                         openssl_private_decrypt($challenge, $postvars['challenge'], $contact['prvkey']);
1296                 }
1297
1298                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
1299
1300                 if (strpos($final_dfrn_id, ':') == 1) {
1301                         $final_dfrn_id = substr($final_dfrn_id, 2);
1302                 }
1303
1304                 if ($final_dfrn_id != $orig_id) {
1305                         Logger::log('dfrn_deliver: wrong dfrn_id.');
1306                         // did not decode properly - cannot trust this site
1307                         Contact::markForArchival($contact);
1308                         return 3;
1309                 }
1310
1311                 $postvars['dfrn_id']      = $idtosend;
1312                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
1313                 if ($dissolve) {
1314                         $postvars['dissolve'] = '1';
1315                 }
1316
1317                 if ((($contact['rel']) && ($contact['rel'] != Contact::SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY)) {
1318                         $postvars['data'] = $atom;
1319                         $postvars['perm'] = 'rw';
1320                 } else {
1321                         $postvars['data'] = str_replace('<dfrn:comment-allow>1', '<dfrn:comment-allow>0', $atom);
1322                         $postvars['perm'] = 'r';
1323                 }
1324
1325                 $postvars['ssl_policy'] = $ssl_policy;
1326
1327                 if ($page) {
1328                         $postvars['page'] = $page;
1329                 }
1330
1331
1332                 if ($rino > 0 && $rino_remote_version > 0 && (! $dissolve)) {
1333                         Logger::log('rino version: '. $rino_remote_version);
1334
1335                         switch ($rino_remote_version) {
1336                                 case 1:
1337                                         $key = openssl_random_pseudo_bytes(16);
1338                                         $data = self::aesEncrypt($postvars['data'], $key);
1339                                         break;
1340
1341                                 default:
1342                                         Logger::log("rino: invalid requested version '$rino_remote_version'");
1343                                         Contact::markForArchival($contact);
1344                                         return -8;
1345                         }
1346
1347                         $postvars['rino'] = $rino_remote_version;
1348                         $postvars['data'] = bin2hex($data);
1349
1350                         if ($dfrn_version >= 2.1) {
1351                                 if (($contact['duplex'] && strlen($contact['pubkey']))
1352                                         || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY && strlen($contact['pubkey']))
1353                                         || ($contact['rel'] == Contact::SHARING && strlen($contact['pubkey']))
1354                                 ) {
1355                                         openssl_public_encrypt($key, $postvars['key'], $contact['pubkey']);
1356                                 } else {
1357                                         openssl_private_encrypt($key, $postvars['key'], $contact['prvkey']);
1358                                 }
1359                         } else {
1360                                 if (($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY)) {
1361                                         openssl_private_encrypt($key, $postvars['key'], $contact['prvkey']);
1362                                 } else {
1363                                         openssl_public_encrypt($key, $postvars['key'], $contact['pubkey']);
1364                                 }
1365                         }
1366
1367                         Logger::log('md5 rawkey ' . md5($postvars['key']));
1368
1369                         $postvars['key'] = bin2hex($postvars['key']);
1370                 }
1371
1372
1373                 Logger::log('dfrn_deliver: ' . "SENDING: " . print_r($postvars, true), Logger::DATA);
1374
1375                 $postResult = Network::post($contact['notify'], $postvars);
1376
1377                 $xml = $postResult->getBody();
1378
1379                 Logger::log('dfrn_deliver: ' . "RECEIVED: " . $xml, Logger::DATA);
1380
1381                 $curl_stat = $postResult->getReturnCode();
1382                 if (empty($curl_stat) || empty($xml)) {
1383                         Contact::markForArchival($contact);
1384                         return -9; // timed out
1385                 }
1386
1387                 if (($curl_stat == 503) && stristr($postResult->getHeader(), 'retry-after')) {
1388                         Contact::markForArchival($contact);
1389                         return -10;
1390                 }
1391
1392                 if (strpos($xml, '<?xml') === false) {
1393                         Logger::log('dfrn_deliver: phase 2: no valid XML returned');
1394                         Logger::log('dfrn_deliver: phase 2: returned XML: ' . $xml, Logger::DATA);
1395                         Contact::markForArchival($contact);
1396                         return 3;
1397                 }
1398
1399                 $res = XML::parseString($xml);
1400
1401                 if (!isset($res->status)) {
1402                         Contact::markForArchival($contact);
1403                         return -11;
1404                 }
1405
1406                 // Possibly old servers had returned an empty value when everything was okay
1407                 if (empty($res->status)) {
1408                         $res->status = 200;
1409                 }
1410
1411                 if (!empty($res->message)) {
1412                         Logger::log('Delivery returned status '.$res->status.' - '.$res->message, Logger::DEBUG);
1413                 }
1414
1415                 if (($res->status >= 200) && ($res->status <= 299)) {
1416                         Contact::unmarkForArchival($contact);
1417                 }
1418
1419                 return intval($res->status);
1420         }
1421
1422         /**
1423          * @brief Transmits atom content to the contacts via the Diaspora transport layer
1424          *
1425          * @param array  $owner   Owner record
1426          * @param array  $contact Contact record of the receiver
1427          * @param string $atom    Content that will be transmitted
1428          *
1429          * @param bool   $public_batch
1430          * @return int Deliver status. Negative values mean an error.
1431          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1432          * @throws \ImagickException
1433          */
1434         public static function transmit($owner, $contact, $atom, $public_batch = false)
1435         {
1436                 if (!$public_batch) {
1437                         if (empty($contact['addr'])) {
1438                                 Logger::log('Empty contact handle for ' . $contact['id'] . ' - ' . $contact['url'] . ' - trying to update it.');
1439                                 if (Contact::updateFromProbe($contact['id'])) {
1440                                         $new_contact = DBA::selectFirst('contact', ['addr'], ['id' => $contact['id']]);
1441                                         $contact['addr'] = $new_contact['addr'];
1442                                 }
1443
1444                                 if (empty($contact['addr'])) {
1445                                         Logger::log('Unable to find contact handle for ' . $contact['id'] . ' - ' . $contact['url']);
1446                                         Contact::markForArchival($contact);
1447                                         return -21;
1448                                 }
1449                         }
1450
1451                         $fcontact = Diaspora::personByHandle($contact['addr']);
1452                         if (empty($fcontact)) {
1453                                 Logger::log('Unable to find contact details for ' . $contact['id'] . ' - ' . $contact['addr']);
1454                                 Contact::markForArchival($contact);
1455                                 return -22;
1456                         }
1457                         $pubkey = $fcontact['pubkey'];
1458                 } else {
1459                         $pubkey = '';
1460                 }
1461
1462                 $envelope = Diaspora::buildMessage($atom, $owner, $contact, $owner['uprvkey'], $pubkey, $public_batch);
1463
1464                 // Create the endpoint for public posts. This is some WIP and should later be added to the probing
1465                 if ($public_batch && empty($contact["batch"])) {
1466                         $parts = parse_url($contact["notify"]);
1467                         $path_parts = explode('/', $parts['path']);
1468                         array_pop($path_parts);
1469                         $parts['path'] =  implode('/', $path_parts);
1470                         $contact["batch"] = Network::unparseURL($parts);
1471                 }
1472
1473                 $dest_url = ($public_batch ? $contact["batch"] : $contact["notify"]);
1474
1475                 $content_type = ($public_batch ? "application/magic-envelope+xml" : "application/json");
1476
1477                 $postResult = Network::post($dest_url, $envelope, ["Content-Type: ".$content_type]);
1478                 $xml = $postResult->getBody();
1479
1480                 $curl_stat = $postResult->getReturnCode();
1481                 if (empty($curl_stat) || empty($xml)) {
1482                         Logger::log('Empty answer from ' . $contact['id'] . ' - ' . $dest_url);
1483                         Contact::markForArchival($contact);
1484                         return -9; // timed out
1485                 }
1486
1487                 if (($curl_stat == 503) && (stristr($postResult->getHeader(), 'retry-after'))) {
1488                         Contact::markForArchival($contact);
1489                         return -10;
1490                 }
1491
1492                 if (strpos($xml, '<?xml') === false) {
1493                         Logger::log('No valid XML returned from ' . $contact['id'] . ' - ' . $dest_url);
1494                         Logger::log('Returned XML: ' . $xml, Logger::DATA);
1495                         Contact::markForArchival($contact);
1496                         return 3;
1497                 }
1498
1499                 $res = XML::parseString($xml);
1500
1501                 if (empty($res->status)) {
1502                         Contact::markForArchival($contact);
1503                         return -23;
1504                 }
1505
1506                 if (!empty($res->message)) {
1507                         Logger::log('Transmit to ' . $dest_url . ' returned status '.$res->status.' - '.$res->message, Logger::DEBUG);
1508                 }
1509
1510                 if (($res->status >= 200) && ($res->status <= 299)) {
1511                         Contact::unmarkForArchival($contact);
1512                 }
1513
1514                 return intval($res->status);
1515         }
1516
1517         /**
1518          * @brief Fetch the author data from head or entry items
1519          *
1520          * @param object $xpath     XPath object
1521          * @param object $context   In which context should the data be searched
1522          * @param array  $importer  Record of the importer user mixed with contact of the content
1523          * @param string $element   Element name from which the data is fetched
1524          * @param bool   $onlyfetch Should the data only be fetched or should it update the contact record as well
1525          * @param string $xml       optional, default empty
1526          *
1527          * @return array Relevant data of the author
1528          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1529          * @throws \ImagickException
1530          * @todo  Find good type-hints for all parameter
1531          */
1532         private static function fetchauthor($xpath, $context, $importer, $element, $onlyfetch, $xml = "")
1533         {
1534                 $author = [];
1535                 $author["name"] = XML::getFirstNodeValue($xpath, $element."/atom:name/text()", $context);
1536                 $author["link"] = XML::getFirstNodeValue($xpath, $element."/atom:uri/text()", $context);
1537
1538                 $fields = ['id', 'uid', 'url', 'network', 'avatar-date', 'avatar', 'name-date', 'uri-date', 'addr',
1539                         'name', 'nick', 'about', 'location', 'keywords', 'xmpp', 'bdyear', 'bd', 'hidden', 'contact-type'];
1540                 $condition = ["`uid` = ? AND `nurl` = ? AND `network` != ?",
1541                         $importer["importer_uid"], Strings::normaliseLink($author["link"]), Protocol::STATUSNET];
1542                 $contact_old = DBA::selectFirst('contact', $fields, $condition);
1543
1544                 if (DBA::isResult($contact_old)) {
1545                         $author["contact-id"] = $contact_old["id"];
1546                         $author["network"] = $contact_old["network"];
1547                 } else {
1548                         if (!$onlyfetch) {
1549                                 Logger::debug("Contact ".$author["link"]." wasn't found for user ".$importer["importer_uid"]." XML: ".$xml);
1550                         }
1551
1552                         $author["contact-unknown"] = true;
1553                         $author["contact-id"] = $importer["id"];
1554                         $author["network"] = $importer["network"];
1555                         $onlyfetch = true;
1556                 }
1557
1558                 // Until now we aren't serving different sizes - but maybe later
1559                 $avatarlist = [];
1560                 /// @todo check if "avatar" or "photo" would be the best field in the specification
1561                 $avatars = $xpath->query($element . "/atom:link[@rel='avatar']", $context);
1562                 foreach ($avatars as $avatar) {
1563                         $href = "";
1564                         $width = 0;
1565                         foreach ($avatar->attributes as $attributes) {
1566                                 /// @TODO Rewrite these similar if() to one switch
1567                                 if ($attributes->name == "href") {
1568                                         $href = $attributes->textContent;
1569                                 }
1570                                 if ($attributes->name == "width") {
1571                                         $width = $attributes->textContent;
1572                                 }
1573                                 if ($attributes->name == "updated") {
1574                                         $author["avatar-date"] = $attributes->textContent;
1575                                 }
1576                         }
1577                         if (($width > 0) && ($href != "")) {
1578                                 $avatarlist[$width] = $href;
1579                         }
1580                 }
1581
1582                 if (count($avatarlist) > 0) {
1583                         krsort($avatarlist);
1584                         $author["avatar"] = current($avatarlist);
1585                 }
1586
1587                 if (empty($author['avatar']) && !empty($author['link'])) {
1588                         $cid = Contact::getIdForURL($author['link'], 0);
1589                         if (!empty($cid)) {
1590                                 $contact = DBA::selectFirst('contact', ['avatar'], ['id' => $cid]);
1591                                 if (DBA::isResult($contact)) {
1592                                         $author['avatar'] = $contact['avatar'];
1593                                 }
1594                         }
1595                 }
1596
1597                 if (empty($author['avatar'])) {
1598                         Logger::log('Empty author: ' . $xml);
1599                         $author['avatar'] = '';
1600                 }
1601
1602                 if (DBA::isResult($contact_old) && !$onlyfetch) {
1603                         Logger::log("Check if contact details for contact " . $contact_old["id"] . " (" . $contact_old["nick"] . ") have to be updated.", Logger::DEBUG);
1604
1605                         $poco = ["url" => $contact_old["url"]];
1606
1607                         // When was the last change to name or uri?
1608                         $name_element = $xpath->query($element . "/atom:name", $context)->item(0);
1609                         foreach ($name_element->attributes as $attributes) {
1610                                 if ($attributes->name == "updated") {
1611                                         $poco["name-date"] = $attributes->textContent;
1612                                 }
1613                         }
1614
1615                         $link_element = $xpath->query($element . "/atom:link", $context)->item(0);
1616                         foreach ($link_element->attributes as $attributes) {
1617                                 if ($attributes->name == "updated") {
1618                                         $poco["uri-date"] = $attributes->textContent;
1619                                 }
1620                         }
1621
1622                         // Update contact data
1623                         $value = XML::getFirstNodeValue($xpath, $element . "/dfrn:handle/text()", $context);
1624                         if ($value != "") {
1625                                 $poco["addr"] = $value;
1626                         }
1627
1628                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:displayName/text()", $context);
1629                         if ($value != "") {
1630                                 $poco["name"] = $value;
1631                         }
1632
1633                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:preferredUsername/text()", $context);
1634                         if ($value != "") {
1635                                 $poco["nick"] = $value;
1636                         }
1637
1638                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:note/text()", $context);
1639                         if ($value != "") {
1640                                 $poco["about"] = $value;
1641                         }
1642
1643                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:address/poco:formatted/text()", $context);
1644                         if ($value != "") {
1645                                 $poco["location"] = $value;
1646                         }
1647
1648                         /// @todo Only search for elements with "poco:type" = "xmpp"
1649                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:ims/poco:value/text()", $context);
1650                         if ($value != "") {
1651                                 $poco["xmpp"] = $value;
1652                         }
1653
1654                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1655                         /// - poco:utcOffset
1656                         /// - poco:urls
1657                         /// - poco:locality
1658                         /// - poco:region
1659                         /// - poco:country
1660
1661                         // If the "hide" element is present then the profile isn't searchable.
1662                         $hide = intval(XML::getFirstNodeValue($xpath, $element . "/dfrn:hide/text()", $context) == "true");
1663
1664                         Logger::log("Hidden status for contact " . $contact_old["url"] . ": " . $hide, Logger::DEBUG);
1665
1666                         // If the contact isn't searchable then set the contact to "hidden".
1667                         // Problem: This can be manually overridden by the user.
1668                         if ($hide) {
1669                                 $contact_old["hidden"] = true;
1670                         }
1671
1672                         // Save the keywords into the contact table
1673                         $tags = [];
1674                         $tagelements = $xpath->evaluate($element . "/poco:tags/text()", $context);
1675                         foreach ($tagelements as $tag) {
1676                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1677                         }
1678
1679                         if (count($tags)) {
1680                                 $poco["keywords"] = implode(", ", $tags);
1681                         }
1682
1683                         // "dfrn:birthday" contains the birthday converted to UTC
1684                         $birthday = XML::getFirstNodeValue($xpath, $element . "/poco:birthday/text()", $context);
1685
1686                         if (strtotime($birthday) > time()) {
1687                                 $bd_timestamp = strtotime($birthday);
1688
1689                                 $poco["bdyear"] = date("Y", $bd_timestamp);
1690                         }
1691
1692                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1693                         $value = XML::getFirstNodeValue($xpath, $element . "/poco:birthday/text()", $context);
1694
1695                         if (!in_array($value, ["", "0000-00-00", DBA::NULL_DATE])) {
1696                                 $bdyear = date("Y");
1697                                 $value = str_replace(["0000", "0001"], $bdyear, $value);
1698
1699                                 if (strtotime($value) < time()) {
1700                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1701                                 }
1702
1703                                 $poco["bd"] = $value;
1704                         }
1705
1706                         $contact = array_merge($contact_old, $poco);
1707
1708                         if ($contact_old["bdyear"] != $contact["bdyear"]) {
1709                                 Event::createBirthday($contact, $birthday);
1710                         }
1711
1712                         // Get all field names
1713                         $fields = [];
1714                         foreach ($contact_old as $field => $data) {
1715                                 $fields[$field] = $data;
1716                         }
1717
1718                         unset($fields["id"]);
1719                         unset($fields["uid"]);
1720                         unset($fields["url"]);
1721                         unset($fields["avatar-date"]);
1722                         unset($fields["avatar"]);
1723                         unset($fields["name-date"]);
1724                         unset($fields["uri-date"]);
1725
1726                         $update = false;
1727                         // Update check for this field has to be done differently
1728                         $datefields = ["name-date", "uri-date"];
1729                         foreach ($datefields as $field) {
1730                                 // The date fields arrives as '2018-07-17T10:44:45Z' - the database return '2018-07-17 10:44:45'
1731                                 // The fields have to be in the same format to be comparable, since strtotime does add timezones.
1732                                 $contact[$field] = DateTimeFormat::utc($contact[$field]);
1733
1734                                 if (strtotime($contact[$field]) > strtotime($contact_old[$field])) {
1735                                         Logger::log("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $contact_old[$field] . "'", Logger::DEBUG);
1736                                         $update = true;
1737                                 }
1738                         }
1739
1740                         foreach ($fields as $field => $data) {
1741                                 if ($contact[$field] != $contact_old[$field]) {
1742                                         Logger::log("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $contact_old[$field] . "'", Logger::DEBUG);
1743                                         $update = true;
1744                                 }
1745                         }
1746
1747                         if ($update) {
1748                                 Logger::log("Update contact data for contact " . $contact["id"] . " (" . $contact["nick"] . ")", Logger::DEBUG);
1749
1750                                 q(
1751                                         "UPDATE `contact` SET `name` = '%s', `nick` = '%s', `about` = '%s', `location` = '%s',
1752                                         `addr` = '%s', `keywords` = '%s', `bdyear` = '%s', `bd` = '%s', `hidden` = %d,
1753                                         `xmpp` = '%s', `name-date`  = '%s', `uri-date` = '%s'
1754                                         WHERE `id` = %d AND `network` = '%s'",
1755                                         DBA::escape($contact["name"]), DBA::escape($contact["nick"]), DBA::escape($contact["about"]),   DBA::escape($contact["location"]),
1756                                         DBA::escape($contact["addr"]), DBA::escape($contact["keywords"]), DBA::escape($contact["bdyear"]),
1757                                         DBA::escape($contact["bd"]), intval($contact["hidden"]), DBA::escape($contact["xmpp"]),
1758                                         DBA::escape(DateTimeFormat::utc($contact["name-date"])), DBA::escape(DateTimeFormat::utc($contact["uri-date"])),
1759                                         intval($contact["id"]), DBA::escape($contact["network"])
1760                                 );
1761                         }
1762
1763                         Contact::updateAvatar(
1764                                 $author['avatar'],
1765                                 $importer['importer_uid'],
1766                                 $contact['id'],
1767                                 (strtotime($contact['avatar-date']) > strtotime($contact_old['avatar-date']) || ($author['avatar'] != $contact_old['avatar']))
1768                         );
1769
1770                         /*
1771                          * The generation is a sign for the reliability of the provided data.
1772                          * It is used in the socgraph.php to prevent that old contact data
1773                          * that was relayed over several servers can overwrite contact
1774                          * data that we received directly.
1775                          */
1776
1777                         $poco["generation"] = 2;
1778                         $poco["photo"] = $author["avatar"];
1779                         $poco["hide"] = $hide;
1780                         $poco["contact-type"] = $contact["contact-type"];
1781                         $gcid = GContact::update($poco);
1782
1783                         GContact::link($gcid, $importer["importer_uid"], $contact["id"]);
1784                 }
1785
1786                 return $author;
1787         }
1788
1789         /**
1790          * @brief Transforms activity objects into an XML string
1791          *
1792          * @param object $xpath    XPath object
1793          * @param object $activity Activity object
1794          * @param string $element  element name
1795          *
1796          * @return string XML string
1797          * @todo Find good type-hints for all parameter
1798          */
1799         private static function transformActivity($xpath, $activity, $element)
1800         {
1801                 if (!is_object($activity)) {
1802                         return "";
1803                 }
1804
1805                 $obj_doc = new DOMDocument("1.0", "utf-8");
1806                 $obj_doc->formatOutput = true;
1807
1808                 $obj_element = $obj_doc->createElementNS(NAMESPACE_ATOM1, $element);
1809
1810                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1811                 XML::addElement($obj_doc, $obj_element, "type", $activity_type);
1812
1813                 $id = $xpath->query("atom:id", $activity)->item(0);
1814                 if (is_object($id)) {
1815                         $obj_element->appendChild($obj_doc->importNode($id, true));
1816                 }
1817
1818                 $title = $xpath->query("atom:title", $activity)->item(0);
1819                 if (is_object($title)) {
1820                         $obj_element->appendChild($obj_doc->importNode($title, true));
1821                 }
1822
1823                 $links = $xpath->query("atom:link", $activity);
1824                 if (is_object($links)) {
1825                         foreach ($links as $link) {
1826                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1827                         }
1828                 }
1829
1830                 $content = $xpath->query("atom:content", $activity)->item(0);
1831                 if (is_object($content)) {
1832                         $obj_element->appendChild($obj_doc->importNode($content, true));
1833                 }
1834
1835                 $obj_doc->appendChild($obj_element);
1836
1837                 $objxml = $obj_doc->saveXML($obj_element);
1838
1839                 /// @todo This isn't totally clean. We should find a way to transform the namespaces
1840                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1841                 return($objxml);
1842         }
1843
1844         /**
1845          * @brief Processes the mail elements
1846          *
1847          * @param object $xpath    XPath object
1848          * @param object $mail     mail elements
1849          * @param array  $importer Record of the importer user mixed with contact of the content
1850          * @return void
1851          * @throws \Exception
1852          * @todo  Find good type-hints for all parameter
1853          */
1854         private static function processMail($xpath, $mail, $importer)
1855         {
1856                 Logger::log("Processing mails");
1857
1858                 /// @TODO Rewrite this to one statement
1859                 $msg = [];
1860                 $msg["uid"] = $importer["importer_uid"];
1861                 $msg["from-name"] = $xpath->query("dfrn:sender/dfrn:name/text()", $mail)->item(0)->nodeValue;
1862                 $msg["from-url"] = $xpath->query("dfrn:sender/dfrn:uri/text()", $mail)->item(0)->nodeValue;
1863                 $msg["from-photo"] = $xpath->query("dfrn:sender/dfrn:avatar/text()", $mail)->item(0)->nodeValue;
1864                 $msg["contact-id"] = $importer["id"];
1865                 $msg["uri"] = $xpath->query("dfrn:id/text()", $mail)->item(0)->nodeValue;
1866                 $msg["parent-uri"] = $xpath->query("dfrn:in-reply-to/text()", $mail)->item(0)->nodeValue;
1867                 $msg["created"] = DateTimeFormat::utc($xpath->query("dfrn:sentdate/text()", $mail)->item(0)->nodeValue);
1868                 $msg["title"] = $xpath->query("dfrn:subject/text()", $mail)->item(0)->nodeValue;
1869                 $msg["body"] = $xpath->query("dfrn:content/text()", $mail)->item(0)->nodeValue;
1870                 $msg["seen"] = 0;
1871                 $msg["replied"] = 0;
1872
1873                 DBA::insert('mail', $msg);
1874
1875                 $msg["id"] = DBA::lastInsertId();
1876
1877                 // send notifications.
1878                 /// @TODO Arange this mess
1879                 $notif_params = [
1880                         "type" => NOTIFY_MAIL,
1881                         "notify_flags" => $importer["notify-flags"],
1882                         "language" => $importer["language"],
1883                         "to_name" => $importer["username"],
1884                         "to_email" => $importer["email"],
1885                         "uid" => $importer["importer_uid"],
1886                         "item" => $msg,
1887                         "parent" => $msg["parent-uri"],
1888                         "source_name" => $msg["from-name"],
1889                         "source_link" => $importer["url"],
1890                         "source_photo" => $importer["thumb"],
1891                         "verb" => ACTIVITY_POST,
1892                         "otype" => "mail"
1893                 ];
1894
1895                 notification($notif_params);
1896
1897                 Logger::log("Mail is processed, notification was sent.");
1898         }
1899
1900         /**
1901          * @brief Processes the suggestion elements
1902          *
1903          * @param object $xpath      XPath object
1904          * @param object $suggestion suggestion elements
1905          * @param array  $importer   Record of the importer user mixed with contact of the content
1906          * @return boolean
1907          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1908          * @todo  Find good type-hints for all parameter
1909          */
1910         private static function processSuggestion($xpath, $suggestion, $importer)
1911         {
1912                 Logger::log("Processing suggestions");
1913
1914                 /// @TODO Rewrite this to one statement
1915                 $suggest = [];
1916                 $suggest["uid"] = $importer["importer_uid"];
1917                 $suggest["cid"] = $importer["id"];
1918                 $suggest["url"] = $xpath->query("dfrn:url/text()", $suggestion)->item(0)->nodeValue;
1919                 $suggest["name"] = $xpath->query("dfrn:name/text()", $suggestion)->item(0)->nodeValue;
1920                 $suggest["photo"] = $xpath->query("dfrn:photo/text()", $suggestion)->item(0)->nodeValue;
1921                 $suggest["request"] = $xpath->query("dfrn:request/text()", $suggestion)->item(0)->nodeValue;
1922                 $suggest["body"] = $xpath->query("dfrn:note/text()", $suggestion)->item(0)->nodeValue;
1923
1924                 // Does our member already have a friend matching this description?
1925
1926                 /*
1927                  * The valid result means the friend we're about to send a friend
1928                  * suggestion already has them in their contact, which means no further
1929                  * action is required.
1930                  *
1931                  * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
1932                  */
1933                 $condition = ['name' => $suggest["name"], 'nurl' => Strings::normaliseLink($suggest["url"]),
1934                         'uid' => $suggest["uid"]];
1935                 if (DBA::exists('contact', $condition)) {
1936                         return false;
1937                 }
1938
1939                 // Do we already have an fcontact record for this person?
1940
1941                 $fid = 0;
1942                 $condition = ['url' => $suggest["url"], 'name' => $suggest["name"], 'request' => $suggest["request"]];
1943                 $fcontact = DBA::selectFirst('fcontact', ['id'], $condition);
1944                 if (DBA::isResult($fcontact)) {
1945                         $fid = $fcontact["id"];
1946
1947                         // OK, we do. Do we already have an introduction for this person?
1948                         if (DBA::exists('intro', ['uid' => $suggest["uid"], 'fid' => $fid])) {
1949                                 /*
1950                                  * The valid result means the friend we're about to send a friend
1951                                  * suggestion already has them in their contact, which means no further
1952                                  * action is required.
1953                                  *
1954                                  * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
1955                                  */
1956                                 return false;
1957                         }
1958                 }
1959                 if (!$fid) {
1960                         $r = q(
1961                                 "INSERT INTO `fcontact` (`name`,`url`,`photo`,`request`) VALUES ('%s', '%s', '%s', '%s')",
1962                                 DBA::escape($suggest["name"]),
1963                                 DBA::escape($suggest["url"]),
1964                                 DBA::escape($suggest["photo"]),
1965                                 DBA::escape($suggest["request"])
1966                         );
1967                         $fid = $r[0]["id"];
1968                 }
1969
1970                 $condition = ['url' => $suggest["url"], 'name' => $suggest["name"], 'request' => $suggest["request"]];
1971                 $fcontact = DBA::selectFirst('fcontact', ['id'], $condition);
1972
1973                 /*
1974                  * If no record in fcontact is found, below INSERT statement will not
1975                  * link an introduction to it.
1976                  */
1977                 if (!DBA::isResult($fcontact)) {
1978                         // Database record did not get created. Quietly give up.
1979                         exit();
1980                 }
1981
1982                 $hash = Strings::getRandomHex();
1983
1984                 q(
1985                         "INSERT INTO `intro` (`uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked`)
1986                         VALUES(%d, %d, %d, '%s', '%s', '%s', %d)",
1987                         intval($suggest["uid"]),
1988                         intval($fid),
1989                         intval($suggest["cid"]),
1990                         DBA::escape($suggest["body"]),
1991                         DBA::escape($hash),
1992                         DBA::escape(DateTimeFormat::utcNow()),
1993                         intval(0)
1994                 );
1995
1996                 notification(
1997                         [
1998                                 "type"         => NOTIFY_SUGGEST,
1999                                 "notify_flags" => $importer["notify-flags"],
2000                                 "language"     => $importer["language"],
2001                                 "to_name"      => $importer["username"],
2002                                 "to_email"     => $importer["email"],
2003                                 "uid"          => $importer["importer_uid"],
2004                                 "item"         => $suggest,
2005                                 "link"         => System::baseUrl()."/notifications/intros",
2006                                 "source_name"  => $importer["name"],
2007                                 "source_link"  => $importer["url"],
2008                                 "source_photo" => $importer["photo"],
2009                                 "verb"         => ACTIVITY_REQ_FRIEND,
2010                                 "otype"        => "intro"]
2011                 );
2012
2013                 return true;
2014         }
2015
2016         /**
2017          * @brief Processes the relocation elements
2018          *
2019          * @param object $xpath      XPath object
2020          * @param object $relocation relocation elements
2021          * @param array  $importer   Record of the importer user mixed with contact of the content
2022          * @return boolean
2023          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2024          * @throws \ImagickException
2025          * @todo  Find good type-hints for all parameter
2026          */
2027         private static function processRelocation($xpath, $relocation, $importer)
2028         {
2029                 Logger::log("Processing relocations");
2030
2031                 /// @TODO Rewrite this to one statement
2032                 $relocate = [];
2033                 $relocate["uid"] = $importer["importer_uid"];
2034                 $relocate["cid"] = $importer["id"];
2035                 $relocate["url"] = $xpath->query("dfrn:url/text()", $relocation)->item(0)->nodeValue;
2036                 $relocate["addr"] = $xpath->query("dfrn:addr/text()", $relocation)->item(0)->nodeValue;
2037                 $relocate["name"] = $xpath->query("dfrn:name/text()", $relocation)->item(0)->nodeValue;
2038                 $relocate["avatar"] = $xpath->query("dfrn:avatar/text()", $relocation)->item(0)->nodeValue;
2039                 $relocate["photo"] = $xpath->query("dfrn:photo/text()", $relocation)->item(0)->nodeValue;
2040                 $relocate["thumb"] = $xpath->query("dfrn:thumb/text()", $relocation)->item(0)->nodeValue;
2041                 $relocate["micro"] = $xpath->query("dfrn:micro/text()", $relocation)->item(0)->nodeValue;
2042                 $relocate["request"] = $xpath->query("dfrn:request/text()", $relocation)->item(0)->nodeValue;
2043                 $relocate["confirm"] = $xpath->query("dfrn:confirm/text()", $relocation)->item(0)->nodeValue;
2044                 $relocate["notify"] = $xpath->query("dfrn:notify/text()", $relocation)->item(0)->nodeValue;
2045                 $relocate["poll"] = $xpath->query("dfrn:poll/text()", $relocation)->item(0)->nodeValue;
2046                 $relocate["sitepubkey"] = $xpath->query("dfrn:sitepubkey/text()", $relocation)->item(0)->nodeValue;
2047
2048                 if (($relocate["avatar"] == "") && ($relocate["photo"] != "")) {
2049                         $relocate["avatar"] = $relocate["photo"];
2050                 }
2051
2052                 if ($relocate["addr"] == "") {
2053                         $relocate["addr"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$3@$2", $relocate["url"]);
2054                 }
2055
2056                 // update contact
2057                 $r = q(
2058                         "SELECT `photo`, `url` FROM `contact` WHERE `id` = %d AND `uid` = %d",
2059                         intval($importer["id"]),
2060                         intval($importer["importer_uid"])
2061                 );
2062
2063                 if (!DBA::isResult($r)) {
2064                         Logger::log("Query failed to execute, no result returned in " . __FUNCTION__);
2065                         return false;
2066                 }
2067
2068                 $old = $r[0];
2069
2070                 // Update the gcontact entry
2071                 $relocate["server_url"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $relocate["url"]);
2072
2073                 $fields = ['name' => $relocate["name"], 'photo' => $relocate["avatar"],
2074                         'url' => $relocate["url"], 'nurl' => Strings::normaliseLink($relocate["url"]),
2075                         'addr' => $relocate["addr"], 'connect' => $relocate["addr"],
2076                         'notify' => $relocate["notify"], 'server_url' => $relocate["server_url"]];
2077                 DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($old["url"])]);
2078
2079                 // Update the contact table. We try to find every entry.
2080                 $fields = ['name' => $relocate["name"], 'avatar' => $relocate["avatar"],
2081                         'url' => $relocate["url"], 'nurl' => Strings::normaliseLink($relocate["url"]),
2082                         'addr' => $relocate["addr"], 'request' => $relocate["request"],
2083                         'confirm' => $relocate["confirm"], 'notify' => $relocate["notify"],
2084                         'poll' => $relocate["poll"], 'site-pubkey' => $relocate["sitepubkey"]];
2085                 $condition = ["(`id` = ?) OR (`nurl` = ?)", $importer["id"], Strings::normaliseLink($old["url"])];
2086
2087                 DBA::update('contact', $fields, $condition);
2088
2089                 Contact::updateAvatar($relocate["avatar"], $importer["importer_uid"], $importer["id"], true);
2090
2091                 Logger::log('Contacts are updated.');
2092
2093                 /// @TODO
2094                 /// merge with current record, current contents have priority
2095                 /// update record, set url-updated
2096                 /// update profile photos
2097                 /// schedule a scan?
2098                 return true;
2099         }
2100
2101         /**
2102          * @brief Updates an item
2103          *
2104          * @param array $current   the current item record
2105          * @param array $item      the new item record
2106          * @param array $importer  Record of the importer user mixed with contact of the content
2107          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
2108          * @return mixed
2109          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2110          * @todo  set proper type-hints (array?)
2111          */
2112         private static function updateContent($current, $item, $importer, $entrytype)
2113         {
2114                 $changed = false;
2115
2116                 if (self::isEditedTimestampNewer($current, $item)) {
2117                         // do not accept (ignore) an earlier edit than one we currently have.
2118                         if (DateTimeFormat::utc($item["edited"]) < $current["edited"]) {
2119                                 return false;
2120                         }
2121
2122                         $fields = ['title' => defaults($item, 'title', ''), 'body' => defaults($item, 'body', ''),
2123                                         'tag' => defaults($item, 'tag', ''), 'changed' => DateTimeFormat::utcNow(),
2124                                         'edited' => DateTimeFormat::utc($item["edited"])];
2125
2126                         $condition = ["`uri` = ? AND `uid` IN (0, ?)", $item["uri"], $importer["importer_uid"]];
2127                         Item::update($fields, $condition);
2128
2129                         $changed = true;
2130                 }
2131                 return $changed;
2132         }
2133
2134         /**
2135          * @brief Detects the entry type of the item
2136          *
2137          * @param array $importer Record of the importer user mixed with contact of the content
2138          * @param array $item     the new item record
2139          *
2140          * @return int Is it a toplevel entry, a comment or a relayed comment?
2141          * @throws \Exception
2142          * @todo  set proper type-hints (array?)
2143          */
2144         private static function getEntryType($importer, $item)
2145         {
2146                 if ($item["parent-uri"] != $item["uri"]) {
2147                         $community = false;
2148
2149                         if ($importer["page-flags"] == User::PAGE_FLAGS_COMMUNITY || $importer["page-flags"] == User::PAGE_FLAGS_PRVGROUP) {
2150                                 $sql_extra = "";
2151                                 $community = true;
2152                                 Logger::log("possible community action");
2153                         } else {
2154                                 $sql_extra = " AND `contact`.`self` AND `item`.`wall` ";
2155                         }
2156
2157                         // was the top-level post for this action written by somebody on this site?
2158                         // Specifically, the recipient?
2159
2160                         $is_a_remote_action = false;
2161
2162                         $parent = Item::selectFirst(['parent-uri'], ['uri' => $item["parent-uri"]]);
2163                         if (DBA::isResult($parent)) {
2164                                 $r = q(
2165                                         "SELECT `item`.`forum_mode`, `item`.`wall` FROM `item`
2166                                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
2167                                         WHERE `item`.`uri` = '%s' AND (`item`.`parent-uri` = '%s' OR `item`.`thr-parent` = '%s')
2168                                         AND `item`.`uid` = %d
2169                                         $sql_extra
2170                                         LIMIT 1",
2171                                         DBA::escape($parent["parent-uri"]),
2172                                         DBA::escape($parent["parent-uri"]),
2173                                         DBA::escape($parent["parent-uri"]),
2174                                         intval($importer["importer_uid"])
2175                                 );
2176                                 if (DBA::isResult($r)) {
2177                                         $is_a_remote_action = true;
2178                                 }
2179                         }
2180
2181                         /*
2182                          * Does this have the characteristics of a community or private group action?
2183                          * If it's an action to a wall post on a community/prvgroup page it's a
2184                          * valid community action. Also forum_mode makes it valid for sure.
2185                          * If neither, it's not.
2186                          */
2187                         if ($is_a_remote_action && $community && (!$r[0]["forum_mode"]) && (!$r[0]["wall"])) {
2188                                 $is_a_remote_action = false;
2189                                 Logger::log("not a community action");
2190                         }
2191
2192                         if ($is_a_remote_action) {
2193                                 return DFRN::REPLY_RC;
2194                         } else {
2195                                 return DFRN::REPLY;
2196                         }
2197                 } else {
2198                         return DFRN::TOP_LEVEL;
2199                 }
2200         }
2201
2202         /**
2203          * @brief Send a "poke"
2204          *
2205          * @param array $item      the new item record
2206          * @param array $importer  Record of the importer user mixed with contact of the content
2207          * @param int   $posted_id The record number of item record that was just posted
2208          * @return void
2209          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2210          * @todo  set proper type-hints (array?)
2211          */
2212         private static function doPoke($item, $importer, $posted_id)
2213         {
2214                 $verb = urldecode(substr($item["verb"], strpos($item["verb"], "#")+1));
2215                 if (!$verb) {
2216                         return;
2217                 }
2218                 $xo = XML::parseString($item["object"], false);
2219
2220                 if (($xo->type == ACTIVITY_OBJ_PERSON) && ($xo->id)) {
2221                         // somebody was poked/prodded. Was it me?
2222                         $Blink = '';
2223                         foreach ($xo->link as $l) {
2224                                 $atts = $l->attributes();
2225                                 switch ($atts["rel"]) {
2226                                         case "alternate":
2227                                                 $Blink = $atts["href"];
2228                                                 break;
2229                                         default:
2230                                                 break;
2231                                 }
2232                         }
2233
2234                         if ($Blink && Strings::compareLink($Blink, System::baseUrl() . "/profile/" . $importer["nickname"])) {
2235                                 $author = DBA::selectFirst('contact', ['name', 'thumb', 'url'], ['id' => $item['author-id']]);
2236
2237                                 $item['id'] = $posted_id;
2238
2239                                 $parent = Item::selectFirst(['id'], ['uri' => $item['parent-uri'], 'uid' => $importer["importer_uid"]]);
2240                                 $item["parent"] = $parent['id'];
2241
2242                                 // send a notification
2243                                 notification(
2244                                         [
2245                                         "type"         => NOTIFY_POKE,
2246                                         "notify_flags" => $importer["notify-flags"],
2247                                         "language"     => $importer["language"],
2248                                         "to_name"      => $importer["username"],
2249                                         "to_email"     => $importer["email"],
2250                                         "uid"          => $importer["importer_uid"],
2251                                         "item"         => $item,
2252                                         "link"         => System::baseUrl()."/display/".urlencode(Item::getGuidById($posted_id)),
2253                                         "source_name"  => $author["name"],
2254                                         "source_link"  => $author["url"],
2255                                         "source_photo" => $author["thumb"],
2256                                         "verb"         => $item["verb"],
2257                                         "otype"        => "person",
2258                                         "activity"     => $verb,
2259                                         "parent"       => $item["parent"]]
2260                                 );
2261                         }
2262                 }
2263         }
2264
2265         /**
2266          * @brief Processes several actions, depending on the verb
2267          *
2268          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
2269          * @param array $importer  Record of the importer user mixed with contact of the content
2270          * @param array $item      the new item record
2271          * @param bool  $is_like   Is the verb a "like"?
2272          *
2273          * @return bool Should the processing of the entries be continued?
2274          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2275          * @todo  set proper type-hints (array?)
2276          */
2277         private static function processVerbs($entrytype, $importer, &$item, &$is_like)
2278         {
2279                 Logger::log("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, Logger::DEBUG);
2280
2281                 if (($entrytype == DFRN::TOP_LEVEL)) {
2282                         // The filling of the the "contact" variable is done for legcy reasons
2283                         // The functions below are partly used by ostatus.php as well - where we have this variable
2284                         $r = q("SELECT * FROM `contact` WHERE `id` = %d", intval($importer["id"]));
2285                         $contact = $r[0];
2286                         $nickname = $contact["nick"];
2287
2288                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
2289                         // This function once was responsible for DFRN and OStatus.
2290                         if (activity_match($item["verb"], ACTIVITY_FOLLOW)) {
2291                                 Logger::log("New follower");
2292                                 Contact::addRelationship($importer, $contact, $item, $nickname);
2293                                 return false;
2294                         }
2295                         if (activity_match($item["verb"], ACTIVITY_UNFOLLOW)) {
2296                                 Logger::log("Lost follower");
2297                                 Contact::removeFollower($importer, $contact, $item);
2298                                 return false;
2299                         }
2300                         if (activity_match($item["verb"], ACTIVITY_REQ_FRIEND)) {
2301                                 Logger::log("New friend request");
2302                                 Contact::addRelationship($importer, $contact, $item, $nickname, true);
2303                                 return false;
2304                         }
2305                         if (activity_match($item["verb"], ACTIVITY_UNFRIEND)) {
2306                                 Logger::log("Lost sharer");
2307                                 Contact::removeSharer($importer, $contact, $item);
2308                                 return false;
2309                         }
2310                 } else {
2311                         if (($item["verb"] == ACTIVITY_LIKE)
2312                                 || ($item["verb"] == ACTIVITY_DISLIKE)
2313                                 || ($item["verb"] == ACTIVITY_ATTEND)
2314                                 || ($item["verb"] == ACTIVITY_ATTENDNO)
2315                                 || ($item["verb"] == ACTIVITY_ATTENDMAYBE)
2316                         ) {
2317                                 $is_like = true;
2318                                 $item["gravity"] = GRAVITY_ACTIVITY;
2319                                 // only one like or dislike per person
2320                                 // splitted into two queries for performance issues
2321                                 $condition = ['uid' => $item["uid"], 'author-id' => $item["author-id"], 'gravity' => GRAVITY_ACTIVITY,
2322                                         'verb' => $item["verb"], 'parent-uri' => $item["parent-uri"]];
2323                                 if (Item::exists($condition)) {
2324                                         return false;
2325                                 }
2326
2327                                 $condition = ['uid' => $item["uid"], 'author-id' => $item["author-id"], 'gravity' => GRAVITY_ACTIVITY,
2328                                         'verb' => $item["verb"], 'thr-parent' => $item["parent-uri"]];
2329                                 if (Item::exists($condition)) {
2330                                         return false;
2331                                 }
2332
2333                                 // The owner of an activity must be the author
2334                                 $item["owner-name"] = $item["author-name"];
2335                                 $item["owner-link"] = $item["author-link"];
2336                                 $item["owner-avatar"] = $item["author-avatar"];
2337                                 $item["owner-id"] = $item["author-id"];
2338                         } else {
2339                                 $is_like = false;
2340                         }
2341
2342                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2343                                 $xo = XML::parseString($item["object"], false);
2344                                 $xt = XML::parseString($item["target"], false);
2345
2346                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2347                                         $item_tag = Item::selectFirst(['id', 'tag'], ['uri' => $xt->id, 'uid' => $importer["importer_uid"]]);
2348
2349                                         if (!DBA::isResult($item_tag)) {
2350                                                 Logger::log("Query failed to execute, no result returned in " . __FUNCTION__);
2351                                                 return false;
2352                                         }
2353
2354                                         // extract tag, if not duplicate, add to parent item
2355                                         if ($xo->content) {
2356                                                 if (!stristr($item_tag["tag"], trim($xo->content))) {
2357                                                         $tag = $item_tag["tag"] . (strlen($item_tag["tag"]) ? ',' : '') . '#[url=' . $xo->id . ']'. $xo->content . '[/url]';
2358                                                         Item::update(['tag' => $tag], ['id' => $item_tag["id"]]);
2359                                                 }
2360                                         }
2361                                 }
2362                         }
2363                 }
2364                 return true;
2365         }
2366
2367         /**
2368          * @brief Processes the link elements
2369          *
2370          * @param object $links link elements
2371          * @param array  $item  the item record
2372          * @return void
2373          * @todo set proper type-hints
2374          */
2375         private static function parseLinks($links, &$item)
2376         {
2377                 $rel = "";
2378                 $href = "";
2379                 $type = "";
2380                 $length = "0";
2381                 $title = "";
2382                 foreach ($links as $link) {
2383                         foreach ($link->attributes as $attributes) {
2384                                 switch ($attributes->name) {
2385                                         case "href"  : $href   = $attributes->textContent; break;
2386                                         case "rel"   : $rel    = $attributes->textContent; break;
2387                                         case "type"  : $type   = $attributes->textContent; break;
2388                                         case "length": $length = $attributes->textContent; break;
2389                                         case "title" : $title  = $attributes->textContent; break;
2390                                 }
2391                         }
2392                         if (($rel != "") && ($href != "")) {
2393                                 switch ($rel) {
2394                                         case "alternate":
2395                                                 $item["plink"] = $href;
2396                                                 break;
2397                                         case "enclosure":
2398                                                 if (!empty($item["attach"])) {
2399                                                         $item["attach"] .= ",";
2400                                                 } else {
2401                                                         $item["attach"] = "";
2402                                                 }
2403
2404                                                 $item["attach"] .= '[attach]href="' . $href . '" length="' . $length . '" type="' . $type . '" title="' . $title . '"[/attach]';
2405                                                 break;
2406                                 }
2407                         }
2408                 }
2409         }
2410
2411         /**
2412          * @brief Processes the entry elements which contain the items and comments
2413          *
2414          * @param array  $header   Array of the header elements that always stay the same
2415          * @param object $xpath    XPath object
2416          * @param object $entry    entry elements
2417          * @param array  $importer Record of the importer user mixed with contact of the content
2418          * @param string $xml      xml
2419          * @return void
2420          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2421          * @throws \ImagickException
2422          * @todo  Add type-hints
2423          */
2424         private static function processEntry($header, $xpath, $entry, $importer, $xml)
2425         {
2426                 Logger::log("Processing entries");
2427
2428                 $item = $header;
2429
2430                 $item["protocol"] = Conversation::PARCEL_DFRN;
2431
2432                 $item["source"] = $xml;
2433
2434                 // Get the uri
2435                 $item["uri"] = XML::getFirstNodeValue($xpath, "atom:id/text()", $entry);
2436
2437                 $item["edited"] = XML::getFirstNodeValue($xpath, "atom:updated/text()", $entry);
2438
2439                 $current = Item::selectFirst(['id', 'uid', 'edited', 'body'],
2440                         ['uri' => $item["uri"], 'uid' => $importer["importer_uid"]]
2441                 );
2442                 // Is there an existing item?
2443                 if (DBA::isResult($current) && !self::isEditedTimestampNewer($current, $item)) {
2444                         Logger::log("Item ".$item["uri"]." (".$item['edited'].") already existed.", Logger::DEBUG);
2445                         return;
2446                 }
2447
2448                 // Fetch the owner
2449                 $owner = self::fetchauthor($xpath, $entry, $importer, "dfrn:owner", true, $xml);
2450
2451                 $owner_unknown = (isset($owner["contact-unknown"]) && $owner["contact-unknown"]);
2452
2453                 $item["owner-name"] = $owner["name"];
2454                 $item["owner-link"] = $owner["link"];
2455                 $item["owner-avatar"] = $owner["avatar"];
2456                 $item["owner-id"] = Contact::getIdForURL($owner["link"], 0);
2457
2458                 // fetch the author
2459                 $author = self::fetchauthor($xpath, $entry, $importer, "atom:author", true, $xml);
2460
2461                 $item["author-name"] = $author["name"];
2462                 $item["author-link"] = $author["link"];
2463                 $item["author-avatar"] = $author["avatar"];
2464                 $item["author-id"] = Contact::getIdForURL($author["link"], 0);
2465
2466                 $item["title"] = XML::getFirstNodeValue($xpath, "atom:title/text()", $entry);
2467
2468                 $item["created"] = XML::getFirstNodeValue($xpath, "atom:published/text()", $entry);
2469
2470                 $item["body"] = XML::getFirstNodeValue($xpath, "dfrn:env/text()", $entry);
2471                 $item["body"] = str_replace([' ',"\t","\r","\n"], ['','','',''], $item["body"]);
2472                 // make sure nobody is trying to sneak some html tags by us
2473                 $item["body"] = Strings::escapeTags(Strings::base64UrlDecode($item["body"]));
2474
2475                 $item["body"] = BBCode::limitBodySize($item["body"]);
2476
2477                 /// @todo Do we really need this check for HTML elements? (It was copied from the old function)
2478                 if ((strpos($item['body'], '<') !== false) && (strpos($item['body'], '>') !== false)) {
2479                         $base_url = \get_app()->getBaseURL();
2480                         $item['body'] = HTML::relToAbs($item['body'], $base_url);
2481
2482                         $item['body'] = HTML::toBBCodeVideo($item['body']);
2483
2484                         $item['body'] = OEmbed::HTML2BBCode($item['body']);
2485
2486                         $config = HTMLPurifier_Config::createDefault();
2487                         $config->set('Cache.DefinitionImpl', null);
2488
2489                         // we shouldn't need a whitelist, because the bbcode converter
2490                         // will strip out any unsupported tags.
2491
2492                         $purifier = new HTMLPurifier($config);
2493                         $item['body'] = $purifier->purify($item['body']);
2494
2495                         $item['body'] = @HTML::toBBCode($item['body']);
2496                 }
2497
2498                 /// @todo We should check for a repeated post and if we know the repeated author.
2499
2500                 // We don't need the content element since "dfrn:env" is always present
2501                 //$item["body"] = $xpath->query("atom:content/text()", $entry)->item(0)->nodeValue;
2502
2503                 $item["location"] = XML::getFirstNodeValue($xpath, "dfrn:location/text()", $entry);
2504
2505                 $item["coord"] = XML::getFirstNodeValue($xpath, "georss:point", $entry);
2506
2507                 $item["private"] = XML::getFirstNodeValue($xpath, "dfrn:private/text()", $entry);
2508
2509                 $item["extid"] = XML::getFirstNodeValue($xpath, "dfrn:extid/text()", $entry);
2510
2511                 if (XML::getFirstNodeValue($xpath, "dfrn:bookmark/text()", $entry) == "true") {
2512                         $item["post-type"] = Item::PT_PAGE;
2513                 }
2514
2515                 $notice_info = $xpath->query("statusnet:notice_info", $entry);
2516                 if ($notice_info && ($notice_info->length > 0)) {
2517                         foreach ($notice_info->item(0)->attributes as $attributes) {
2518                                 if ($attributes->name == "source") {
2519                                         $item["app"] = strip_tags($attributes->textContent);
2520                                 }
2521                         }
2522                 }
2523
2524                 $item["guid"] = XML::getFirstNodeValue($xpath, "dfrn:diaspora_guid/text()", $entry);
2525
2526                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "Item::insert"
2527                 $dsprsig = XML::unescape(XML::getFirstNodeValue($xpath, "dfrn:diaspora_signature/text()", $entry));
2528                 if ($dsprsig != "") {
2529                         $item["dsprsig"] = $dsprsig;
2530                 }
2531
2532                 $item["verb"] = XML::getFirstNodeValue($xpath, "activity:verb/text()", $entry);
2533
2534                 if (XML::getFirstNodeValue($xpath, "activity:object-type/text()", $entry) != "") {
2535                         $item["object-type"] = XML::getFirstNodeValue($xpath, "activity:object-type/text()", $entry);
2536                 }
2537
2538                 $object = $xpath->query("activity:object", $entry)->item(0);
2539                 $item["object"] = self::transformActivity($xpath, $object, "object");
2540
2541                 if (trim($item["object"]) != "") {
2542                         $r = XML::parseString($item["object"], false);
2543                         if (isset($r->type)) {
2544                                 $item["object-type"] = $r->type;
2545                         }
2546                 }
2547
2548                 $target = $xpath->query("activity:target", $entry)->item(0);
2549                 $item["target"] = self::transformActivity($xpath, $target, "target");
2550
2551                 $categories = $xpath->query("atom:category", $entry);
2552                 if ($categories) {
2553                         foreach ($categories as $category) {
2554                                 $term = "";
2555                                 $scheme = "";
2556                                 foreach ($category->attributes as $attributes) {
2557                                         if ($attributes->name == "term") {
2558                                                 $term = $attributes->textContent;
2559                                         }
2560
2561                                         if ($attributes->name == "scheme") {
2562                                                 $scheme = $attributes->textContent;
2563                                         }
2564                                 }
2565
2566                                 if (($term != "") && ($scheme != "")) {
2567                                         $parts = explode(":", $scheme);
2568                                         if ((count($parts) >= 4) && (array_shift($parts) == "X-DFRN")) {
2569                                                 $termhash = array_shift($parts);
2570                                                 $termurl = implode(":", $parts);
2571
2572                                                 if (!empty($item["tag"])) {
2573                                                         $item["tag"] .= ",";
2574                                                 } else {
2575                                                         $item["tag"] = "";
2576                                                 }
2577
2578                                                 $item["tag"] .= $termhash . "[url=" . $termurl . "]" . $term . "[/url]";
2579                                         }
2580                                 }
2581                         }
2582                 }
2583
2584                 $links = $xpath->query("atom:link", $entry);
2585                 if ($links) {
2586                         self::parseLinks($links, $item);
2587                 }
2588
2589                 $item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
2590
2591                 $conv = $xpath->query('ostatus:conversation', $entry);
2592                 if (is_object($conv->item(0))) {
2593                         foreach ($conv->item(0)->attributes as $attributes) {
2594                                 if ($attributes->name == "ref") {
2595                                         $item['conversation-uri'] = $attributes->textContent;
2596                                 }
2597                                 if ($attributes->name == "href") {
2598                                         $item['conversation-href'] = $attributes->textContent;
2599                                 }
2600                         }
2601                 }
2602
2603                 // Is it a reply or a top level posting?
2604                 $item["parent-uri"] = $item["uri"];
2605
2606                 $inreplyto = $xpath->query("thr:in-reply-to", $entry);
2607                 if (is_object($inreplyto->item(0))) {
2608                         foreach ($inreplyto->item(0)->attributes as $attributes) {
2609                                 if ($attributes->name == "ref") {
2610                                         $item["parent-uri"] = $attributes->textContent;
2611                                 }
2612                         }
2613                 }
2614
2615                 // Get the type of the item (Top level post, reply or remote reply)
2616                 $entrytype = self::getEntryType($importer, $item);
2617
2618                 // Now assign the rest of the values that depend on the type of the message
2619                 if (in_array($entrytype, [DFRN::REPLY, DFRN::REPLY_RC])) {
2620                         if (!isset($item["object-type"])) {
2621                                 $item["object-type"] = ACTIVITY_OBJ_COMMENT;
2622                         }
2623
2624                         if ($item["contact-id"] != $owner["contact-id"]) {
2625                                 $item["contact-id"] = $owner["contact-id"];
2626                         }
2627
2628                         if (($item["network"] != $owner["network"]) && ($owner["network"] != "")) {
2629                                 $item["network"] = $owner["network"];
2630                         }
2631
2632                         if ($item["contact-id"] != $author["contact-id"]) {
2633                                 $item["contact-id"] = $author["contact-id"];
2634                         }
2635
2636                         if (($item["network"] != $author["network"]) && ($author["network"] != "")) {
2637                                 $item["network"] = $author["network"];
2638                         }
2639                 }
2640
2641                 if ($entrytype == DFRN::REPLY_RC) {
2642                         $item["wall"] = 1;
2643                 } elseif ($entrytype == DFRN::TOP_LEVEL) {
2644                         if (!isset($item["object-type"])) {
2645                                 $item["object-type"] = ACTIVITY_OBJ_NOTE;
2646                         }
2647
2648                         // Is it an event?
2649                         if (($item["object-type"] == ACTIVITY_OBJ_EVENT) && !$owner_unknown) {
2650                                 Logger::log("Item ".$item["uri"]." seems to contain an event.", Logger::DEBUG);
2651                                 $ev = Event::fromBBCode($item["body"]);
2652                                 if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
2653                                         Logger::log("Event in item ".$item["uri"]." was found.", Logger::DEBUG);
2654                                         $ev["cid"]     = $importer["id"];
2655                                         $ev["uid"]     = $importer["importer_uid"];
2656                                         $ev["uri"]     = $item["uri"];
2657                                         $ev["edited"]  = $item["edited"];
2658                                         $ev["private"] = $item["private"];
2659                                         $ev["guid"]    = $item["guid"];
2660                                         $ev["plink"]   = $item["plink"];
2661
2662                                         $condition = ['uri' => $item["uri"], 'uid' => $importer["importer_uid"]];
2663                                         $event = DBA::selectFirst('event', ['id'], $condition);
2664                                         if (DBA::isResult($event)) {
2665                                                 $ev["id"] = $event["id"];
2666                                         }
2667
2668                                         $event_id = Event::store($ev);
2669                                         Logger::log("Event ".$event_id." was stored", Logger::DEBUG);
2670                                         return;
2671                                 }
2672                         }
2673                 }
2674
2675                 if (!self::processVerbs($entrytype, $importer, $item, $is_like)) {
2676                         Logger::log("Exiting because 'processVerbs' told us so", Logger::DEBUG);
2677                         return;
2678                 }
2679
2680                 // This check is done here to be able to receive connection requests in "processVerbs"
2681                 if (($entrytype == DFRN::TOP_LEVEL) && $owner_unknown) {
2682                         Logger::log("Item won't be stored because user " . $importer["importer_uid"] . " doesn't follow " . $item["owner-link"] . ".", Logger::DEBUG);
2683                         return;
2684                 }
2685
2686
2687                 // Update content if 'updated' changes
2688                 if (DBA::isResult($current)) {
2689                         if (self::updateContent($current, $item, $importer, $entrytype)) {
2690                                 Logger::log("Item ".$item["uri"]." was updated.", Logger::DEBUG);
2691                         } else {
2692                                 Logger::log("Item " . $item["uri"] . " already existed.", Logger::DEBUG);
2693                         }
2694                         return;
2695                 }
2696
2697                 if (in_array($entrytype, [DFRN::REPLY, DFRN::REPLY_RC])) {
2698                         $posted_id = Item::insert($item);
2699                         if ($posted_id) {
2700                                 Logger::log("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, Logger::DEBUG);
2701
2702                                 if ($item['uid'] == 0) {
2703                                         Item::distribute($posted_id);
2704                                 }
2705
2706                                 return true;
2707                         }
2708                 } else { // $entrytype == DFRN::TOP_LEVEL
2709                         if (($importer["uid"] == 0) && ($importer["importer_uid"] != 0)) {
2710                                 Logger::log("Contact ".$importer["id"]." isn't known to user ".$importer["importer_uid"].". The post will be ignored.", Logger::DEBUG);
2711                                 return;
2712                         }
2713                         if (!Strings::compareLink($item["owner-link"], $importer["url"])) {
2714                                 /*
2715                                  * The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery,
2716                                  * but otherwise there's a possible data mixup on the sender's system.
2717                                  * the tgroup delivery code called from Item::insert will correct it if it's a forum,
2718                                  * but we're going to unconditionally correct it here so that the post will always be owned by our contact.
2719                                  */
2720                                 Logger::log('Correcting item owner.', Logger::DEBUG);
2721                                 $item["owner-link"] = $importer["url"];
2722                                 $item["owner-id"] = Contact::getIdForURL($importer["url"], 0);
2723                         }
2724
2725                         if (($importer["rel"] == Contact::FOLLOWER) && (!self::tgroupCheck($importer["importer_uid"], $item))) {
2726                                 Logger::log("Contact ".$importer["id"]." is only follower and tgroup check was negative.", Logger::DEBUG);
2727                                 return;
2728                         }
2729
2730                         // This is my contact on another system, but it's really me.
2731                         // Turn this into a wall post.
2732                         $notify = Item::isRemoteSelf($importer, $item);
2733
2734                         $posted_id = Item::insert($item, false, $notify);
2735
2736                         if ($notify) {
2737                                 $posted_id = $notify;
2738                         }
2739
2740                         Logger::log("Item was stored with id ".$posted_id, Logger::DEBUG);
2741
2742                         if ($item['uid'] == 0) {
2743                                 Item::distribute($posted_id);
2744                         }
2745
2746                         if (stristr($item["verb"], ACTIVITY_POKE)) {
2747                                 self::doPoke($item, $importer, $posted_id);
2748                         }
2749                 }
2750         }
2751
2752         /**
2753          * @brief Deletes items
2754          *
2755          * @param object $xpath    XPath object
2756          * @param object $deletion deletion elements
2757          * @param array  $importer Record of the importer user mixed with contact of the content
2758          * @return void
2759          * @throws \Exception
2760          * @todo  set proper type-hints
2761          */
2762         private static function processDeletion($xpath, $deletion, $importer)
2763         {
2764                 Logger::log("Processing deletions");
2765                 $uri = null;
2766
2767                 foreach ($deletion->attributes as $attributes) {
2768                         if ($attributes->name == "ref") {
2769                                 $uri = $attributes->textContent;
2770                         }
2771                 }
2772
2773                 if (!$uri || !$importer["id"]) {
2774                         return false;
2775                 }
2776
2777                 $condition = ['uri' => $uri, 'uid' => $importer["importer_uid"]];
2778                 $item = Item::selectFirst(['id', 'parent', 'contact-id', 'file', 'deleted'], $condition);
2779                 if (!DBA::isResult($item)) {
2780                         Logger::log("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " wasn't found.", Logger::DEBUG);
2781                         return;
2782                 }
2783
2784                 if (strstr($item['file'], '[')) {
2785                         Logger::log("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " is filed. So it won't be deleted.", Logger::DEBUG);
2786                         return;
2787                 }
2788
2789                 // When it is a starting post it has to belong to the person that wants to delete it
2790                 if (($item['id'] == $item['parent']) && ($item['contact-id'] != $importer["id"])) {
2791                         Logger::log("Item with uri " . $uri . " don't belong to contact " . $importer["id"] . " - ignoring deletion.", Logger::DEBUG);
2792                         return;
2793                 }
2794
2795                 // Comments can be deleted by the thread owner or comment owner
2796                 if (($item['id'] != $item['parent']) && ($item['contact-id'] != $importer["id"])) {
2797                         $condition = ['id' => $item['parent'], 'contact-id' => $importer["id"]];
2798                         if (!Item::exists($condition)) {
2799                                 Logger::log("Item with uri " . $uri . " wasn't found or mustn't be deleted by contact " . $importer["id"] . " - ignoring deletion.", Logger::DEBUG);
2800                                 return;
2801                         }
2802                 }
2803
2804                 if ($item["deleted"]) {
2805                         return;
2806                 }
2807
2808                 Logger::log('deleting item '.$item['id'].' uri='.$uri, Logger::DEBUG);
2809
2810                 Item::delete(['id' => $item['id']]);
2811         }
2812
2813         /**
2814          * @brief Imports a DFRN message
2815          *
2816          * @param string $xml          The DFRN message
2817          * @param array  $importer     Record of the importer user mixed with contact of the content
2818          * @param bool   $sort_by_date Is used when feeds are polled
2819          * @return integer Import status
2820          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2821          * @throws \ImagickException
2822          * @todo  set proper type-hints
2823          */
2824         public static function import($xml, $importer, $sort_by_date = false)
2825         {
2826                 if ($xml == "") {
2827                         return 400;
2828                 }
2829
2830                 $doc = new DOMDocument();
2831                 @$doc->loadXML($xml);
2832
2833                 $xpath = new DOMXPath($doc);
2834                 $xpath->registerNamespace("atom", NAMESPACE_ATOM1);
2835                 $xpath->registerNamespace("thr", NAMESPACE_THREAD);
2836                 $xpath->registerNamespace("at", NAMESPACE_TOMB);
2837                 $xpath->registerNamespace("media", NAMESPACE_MEDIA);
2838                 $xpath->registerNamespace("dfrn", NAMESPACE_DFRN);
2839                 $xpath->registerNamespace("activity", NAMESPACE_ACTIVITY);
2840                 $xpath->registerNamespace("georss", NAMESPACE_GEORSS);
2841                 $xpath->registerNamespace("poco", NAMESPACE_POCO);
2842                 $xpath->registerNamespace("ostatus", NAMESPACE_OSTATUS);
2843                 $xpath->registerNamespace("statusnet", NAMESPACE_STATUSNET);
2844
2845                 $header = [];
2846                 $header["uid"] = $importer["importer_uid"];
2847                 $header["network"] = Protocol::DFRN;
2848                 $header["wall"] = 0;
2849                 $header["origin"] = 0;
2850                 $header["contact-id"] = $importer["id"];
2851
2852                 // Update the contact table if the data has changed
2853
2854                 // The "atom:author" is only present in feeds
2855                 if ($xpath->query("/atom:feed/atom:author")->length > 0) {
2856                         self::fetchauthor($xpath, $doc->firstChild, $importer, "atom:author", false, $xml);
2857                 }
2858
2859                 // Only the "dfrn:owner" in the head section contains all data
2860                 if ($xpath->query("/atom:feed/dfrn:owner")->length > 0) {
2861                         self::fetchauthor($xpath, $doc->firstChild, $importer, "dfrn:owner", false, $xml);
2862                 }
2863
2864                 Logger::log("Import DFRN message for user " . $importer["importer_uid"] . " from contact " . $importer["id"], Logger::DEBUG);
2865
2866                 // is it a public forum? Private forums aren't exposed with this method
2867                 $forum = intval(XML::getFirstNodeValue($xpath, "/atom:feed/dfrn:community/text()"));
2868
2869                 // The account type is new since 3.5.1
2870                 if ($xpath->query("/atom:feed/dfrn:account_type")->length > 0) {
2871                         // Hint: We are using separate update calls for uid=0 and uid!=0 since a combined call is bad for the database performance
2872
2873                         $accounttype = intval(XML::getFirstNodeValue($xpath, "/atom:feed/dfrn:account_type/text()"));
2874
2875                         if ($accounttype != $importer["contact-type"]) {
2876                                 DBA::update('contact', ['contact-type' => $accounttype], ['id' => $importer['id']]);
2877
2878                                 // Updating the public contact as well
2879                                 DBA::update('contact', ['contact-type' => $accounttype], ['uid' => 0, 'nurl' => $importer['nurl']]);
2880                         }
2881                         // A forum contact can either have set "forum" or "prv" - but not both
2882                         if ($accounttype == User::ACCOUNT_TYPE_COMMUNITY) {
2883                                 // It's a forum, so either set the public or private forum flag
2884                                 $condition = ['(`forum` != ? OR `prv` != ?) AND `id` = ?', $forum, !$forum, $importer['id']];
2885                                 DBA::update('contact', ['forum' => $forum, 'prv' => !$forum], $condition);
2886
2887                                 // Updating the public contact as well
2888                                 $condition = ['(`forum` != ? OR `prv` != ?) AND `uid` = 0 AND `nurl` = ?', $forum, !$forum, $importer['nurl']];
2889                                 DBA::update('contact', ['forum' => $forum, 'prv' => !$forum], $condition);
2890                         } else {
2891                                 // It's not a forum, so remove the flags
2892                                 $condition = ['(`forum` OR `prv`) AND `id` = ?', $importer['id']];
2893                                 DBA::update('contact', ['forum' => false, 'prv' => false], $condition);
2894
2895                                 // Updating the public contact as well
2896                                 $condition = ['(`forum` OR `prv`) AND `uid` = 0 AND `nurl` = ?', $importer['nurl']];
2897                                 DBA::update('contact', ['forum' => false, 'prv' => false], $condition);
2898                         }
2899                 } elseif ($forum != $importer["forum"]) { // Deprecated since 3.5.1
2900                         $condition = ['`forum` != ? AND `id` = ?', $forum, $importer["id"]];
2901                         DBA::update('contact', ['forum' => $forum], $condition);
2902
2903                         // Updating the public contact as well
2904                         $condition = ['`forum` != ? AND `uid` = 0 AND `nurl` = ?', $forum, $importer['nurl']];
2905                         DBA::update('contact', ['forum' => $forum], $condition);
2906                 }
2907
2908
2909                 // We are processing relocations even if we are ignoring a contact
2910                 $relocations = $xpath->query("/atom:feed/dfrn:relocate");
2911                 foreach ($relocations as $relocation) {
2912                         self::processRelocation($xpath, $relocation, $importer);
2913                 }
2914
2915                 if (($importer["uid"] != 0) && !$importer["readonly"]) {
2916                         $mails = $xpath->query("/atom:feed/dfrn:mail");
2917                         foreach ($mails as $mail) {
2918                                 self::processMail($xpath, $mail, $importer);
2919                         }
2920
2921                         $suggestions = $xpath->query("/atom:feed/dfrn:suggest");
2922                         foreach ($suggestions as $suggestion) {
2923                                 self::processSuggestion($xpath, $suggestion, $importer);
2924                         }
2925                 }
2926
2927                 $deletions = $xpath->query("/atom:feed/at:deleted-entry");
2928                 foreach ($deletions as $deletion) {
2929                         self::processDeletion($xpath, $deletion, $importer);
2930                 }
2931
2932                 if (!$sort_by_date) {
2933                         $entries = $xpath->query("/atom:feed/atom:entry");
2934                         foreach ($entries as $entry) {
2935                                 self::processEntry($header, $xpath, $entry, $importer, $xml);
2936                         }
2937                 } else {
2938                         $newentries = [];
2939                         $entries = $xpath->query("/atom:feed/atom:entry");
2940                         foreach ($entries as $entry) {
2941                                 $created = XML::getFirstNodeValue($xpath, "atom:published/text()", $entry);
2942                                 $newentries[strtotime($created)] = $entry;
2943                         }
2944
2945                         // Now sort after the publishing date
2946                         ksort($newentries);
2947
2948                         foreach ($newentries as $entry) {
2949                                 self::processEntry($header, $xpath, $entry, $importer, $xml);
2950                         }
2951                 }
2952                 Logger::log("Import done for user " . $importer["importer_uid"] . " from contact " . $importer["id"], Logger::DEBUG);
2953                 return 200;
2954         }
2955
2956         /**
2957          * @param App    $a            App
2958          * @param string $contact_nick contact nickname
2959          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2960          */
2961         public static function autoRedir(App $a, $contact_nick)
2962         {
2963                 // prevent looping
2964                 if (!empty($_REQUEST['redir'])) {
2965                         return;
2966                 }
2967
2968                 if ((! $contact_nick) || ($contact_nick === $a->user['nickname'])) {
2969                         return;
2970                 }
2971
2972                 if (local_user()) {
2973                         // We need to find out if $contact_nick is a user on this hub, and if so, if I
2974                         // am a contact of that user. However, that user may have other contacts with the
2975                         // same nickname as me on other hubs or other networks. Exclude these by requiring
2976                         // that the contact have a local URL. I will be the only person with my nickname at
2977                         // this URL, so if a result is found, then I am a contact of the $contact_nick user.
2978                         //
2979                         // We also have to make sure that I'm a legitimate contact--I'm not blocked or pending.
2980
2981                         $baseurl = System::baseUrl();
2982                         $domain_st = strpos($baseurl, "://");
2983                         if ($domain_st === false) {
2984                                 return;
2985                         }
2986                         $baseurl = substr($baseurl, $domain_st + 3);
2987                         $nurl = Strings::normaliseLink($baseurl);
2988
2989                         /// @todo Why is there a query for "url" *and* "nurl"? Especially this normalising is strange.
2990                         $r = q("SELECT `id` FROM `contact` WHERE `uid` = (SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1)
2991                                         AND `nick` = '%s' AND NOT `self` AND (`url` LIKE '%%%s%%' OR `nurl` LIKE '%%%s%%') AND NOT `blocked` AND NOT `pending` LIMIT 1",
2992                                 DBA::escape($contact_nick),
2993                                 DBA::escape($a->user['nickname']),
2994                                 DBA::escape($baseurl),
2995                                 DBA::escape($nurl)
2996                         );
2997                         if ((! DBA::isResult($r)) || $r[0]['id'] == remote_user()) {
2998                                 return;
2999                         }
3000
3001                         $r = q("SELECT * FROM contact WHERE nick = '%s'
3002                                         AND network = '%s' AND uid = %d  AND url LIKE '%%%s%%' LIMIT 1",
3003                                 DBA::escape($contact_nick),
3004                                 DBA::escape(Protocol::DFRN),
3005                                 intval(local_user()),
3006                                 DBA::escape($baseurl)
3007                         );
3008                         if (! DBA::isResult($r)) {
3009                                 return;
3010                         }
3011
3012                         $cid = $r[0]['id'];
3013
3014                         $dfrn_id = (($r[0]['issued-id']) ? $r[0]['issued-id'] : $r[0]['dfrn-id']);
3015
3016                         if ($r[0]['duplex'] && $r[0]['issued-id']) {
3017                                 $orig_id = $r[0]['issued-id'];
3018                                 $dfrn_id = '1:' . $orig_id;
3019                         }
3020                         if ($r[0]['duplex'] && $r[0]['dfrn-id']) {
3021                                 $orig_id = $r[0]['dfrn-id'];
3022                                 $dfrn_id = '0:' . $orig_id;
3023                         }
3024
3025                         // ensure that we've got a valid ID. There may be some edge cases with forums and non-duplex mode
3026                         // that may have triggered some of the "went to {profile/intro} and got an RSS feed" issues
3027
3028                         if (strlen($dfrn_id) < 3) {
3029                                 return;
3030                         }
3031
3032                         $sec = Strings::getRandomHex();
3033
3034                         DBA::insert('profile_check', ['uid' => local_user(), 'cid' => $cid, 'dfrn_id' => $dfrn_id, 'sec' => $sec, 'expire' => time() + 45]);
3035
3036                         $url = curPageURL();
3037
3038                         Logger::log('auto_redir: ' . $r[0]['name'] . ' ' . $sec, Logger::DEBUG);
3039                         $dest = (($url) ? '&destination_url=' . $url : '');
3040                         System::externalRedirect($r[0]['poll'] . '?dfrn_id=' . $dfrn_id
3041                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=' . $sec . $dest);
3042                 }
3043
3044                 return;
3045         }
3046
3047         /**
3048          * @brief Returns the activity verb
3049          *
3050          * @param array $item Item array
3051          *
3052          * @return string activity verb
3053          */
3054         private static function constructVerb(array $item)
3055         {
3056                 if ($item['verb']) {
3057                         return $item['verb'];
3058                 }
3059                 return ACTIVITY_POST;
3060         }
3061
3062         private static function tgroupCheck($uid, $item)
3063         {
3064                 $mention = false;
3065
3066                 // check that the message originated elsewhere and is a top-level post
3067
3068                 if ($item['wall'] || $item['origin'] || ($item['uri'] != $item['parent-uri'])) {
3069                         return false;
3070                 }
3071
3072                 $user = DBA::selectFirst('user', ['page-flags', 'nickname'], ['uid' => $uid]);
3073                 if (!DBA::isResult($user)) {
3074                         return false;
3075                 }
3076
3077                 $community_page = ($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY);
3078                 $prvgroup = ($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP);
3079
3080                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
3081
3082                 /*
3083                  * Diaspora uses their own hardwired link URL in @-tags
3084                  * instead of the one we supply with webfinger
3085                  */
3086                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
3087
3088                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
3089                 if ($cnt) {
3090                         foreach ($matches as $mtch) {
3091                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
3092                                         $mention = true;
3093                                         Logger::log('mention found: ' . $mtch[2]);
3094                                 }
3095                         }
3096                 }
3097
3098                 if (!$mention) {
3099                         return false;
3100                 }
3101
3102                 return $community_page || $prvgroup;
3103         }
3104
3105         /**
3106          * This function returns true if $update has an edited timestamp newer
3107          * than $existing, i.e. $update contains new data which should override
3108          * what's already there.  If there is no timestamp yet, the update is
3109          * assumed to be newer.  If the update has no timestamp, the existing
3110          * item is assumed to be up-to-date.  If the timestamps are equal it
3111          * assumes the update has been seen before and should be ignored.
3112          *
3113          * @param $existing
3114          * @param $update
3115          * @return bool
3116          * @throws \Exception
3117          */
3118         private static function isEditedTimestampNewer($existing, $update)
3119         {
3120                 if (empty($existing['edited'])) {
3121                         return true;
3122                 }
3123                 if (empty($update['edited'])) {
3124                         return false;
3125                 }
3126
3127                 $existing_edited = DateTimeFormat::utc($existing['edited']);
3128                 $update_edited = DateTimeFormat::utc($update['edited']);
3129
3130                 return (strcmp($existing_edited, $update_edited) < 0);
3131         }
3132 }