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 Friendica\App;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\System;
  14 use Friendica\Core\Worker;
  15 use Friendica\Database\DBM;
  16 use Friendica\Model\GlobalContact;
  17 use Friendica\Object\Contact;
  18 use Friendica\Object\Profile;
  19 use Friendica\Protocol\OStatus;
  20 use Friendica\Util\XML;
  21
  22 use dba;
  23 use DOMDocument;
  24 use DomXPath;
  25
  26 require_once "include/enotify.php";
  27 require_once "include/threads.php";
  28 require_once "include/items.php";
  29 require_once "include/tags.php";
  30 require_once "include/files.php";
  31 require_once "include/event.php";
  32 require_once "include/text.php";
  33 require_once "include/oembed.php";
  34 require_once "include/html2bbcode.php";
  35 require_once "include/bbcode.php";
  36
  37 /**
  38  * @brief This class contain functions to create and send DFRN XML files
  39  */
  40 class DFRN
  41 {
  42
  43         const DFRN_TOP_LEVEL = 0;       // Top level posting
  44         const DFRN_REPLY = 1;           // Regular reply that is stored locally
  45         const DFRN_REPLY_RC = 2;        // Reply that will be relayed
  46
  47         /**
  48          * @brief Generates the atom entries for delivery.php
  49          *
  50          * This function is used whenever content is transmitted via DFRN.
  51          *
  52          * @param array $items Item elements
  53          * @param array $owner Owner record
  54          *
  55          * @return string DFRN entries
  56          * @todo Add type-hints
  57          */
  58         public static function entries($items, $owner)
  59         {
  60                 $doc = new DOMDocument('1.0', 'utf-8');
  61                 $doc->formatOutput = true;
  62
  63                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
  64
  65                 if (! count($items)) {
  66                         return trim($doc->saveXML());
  67                 }
  68
  69                 foreach ($items as $item) {
  70                         $entry = self::entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
  71                         $root->appendChild($entry);
  72                 }
  73
  74                 return(trim($doc->saveXML()));
  75         }
  76
  77         /**
  78          * @brief Generate an atom feed for the given user
  79          *
  80          * This function is called when another server is pulling data from the user feed.
  81          *
  82          * @param string  $dfrn_id     DFRN ID from the requesting party
  83          * @param string  $owner_nick  Owner nick name
  84          * @param string  $last_update Date of the last update
  85          * @param int     $direction   Can be -1, 0 or 1.
  86          * @param boolean $onlyheader  Output only the header without content? (Default is "no")
  87          *
  88          * @return string DFRN feed entries
  89          */
  90         public static function feed($dfrn_id, $owner_nick, $last_update, $direction = 0, $onlyheader = false)
  91         {
  92                 $a = get_app();
  93
  94                 $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
  95                 $public_feed = (($dfrn_id) ? false : true);
  96                 $starred     = false;   // not yet implemented, possible security issues
  97                 $converse    = false;
  98
  99                 if ($public_feed && $a->argc > 2) {
 100                         for ($x = 2; $x < $a->argc; $x++) {
 101                                 if ($a->argv[$x] == 'converse') {
 102                                         $converse = true;
 103                                 }
 104                                 if ($a->argv[$x] == 'starred') {
 105                                         $starred = true;
 106                                 }
 107                                 if ($a->argv[$x] == 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1])) {
 108                                         $category = $a->argv[$x+1];
 109                                 }
 110                         }
 111                 }
 112
 113
 114
 115                 // default permissions - anonymous user
 116
 117                 $sql_extra = " AND `item`.`allow_cid` = '' AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = '' ";
 118
 119                 $r = q(
 120                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 121                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 122                         WHERE `contact`.`self` AND `user`.`nickname` = '%s' LIMIT 1",
 123                         dbesc($owner_nick)
 124                 );
 125
 126                 if (! DBM::is_result($r)) {
 127                         killme();
 128                 }
 129
 130                 $owner = $r[0];
 131                 $owner_id = $owner['uid'];
 132                 $owner_nick = $owner['nickname'];
 133
 134                 $sql_post_table = "";
 135
 136                 if (! $public_feed) {
 137                         $sql_extra = '';
 138                         switch ($direction) {
 139                                 case (-1):
 140                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 141                                         $my_id = $dfrn_id;
 142                                         break;
 143                                 case 0:
 144                                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 145                                         $my_id = '1:' . $dfrn_id;
 146                                         break;
 147                                 case 1:
 148                                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 149                                         $my_id = '0:' . $dfrn_id;
 150                                         break;
 151                                 default:
 152                                         return false;
 153                                         break; // NOTREACHED
 154                         }
 155
 156                         $r = q(
 157                                 "SELECT * FROM `contact` WHERE NOT `blocked` AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 158                                 intval($owner_id)
 159                         );
 160
 161                         if (! DBM::is_result($r)) {
 162                                 killme();
 163                         }
 164
 165                         $contact = $r[0];
 166                         include_once 'include/security.php';
 167                         $groups = init_groups_visitor($contact['id']);
 168
 169                         if (count($groups)) {
 170                                 for ($x = 0; $x < count($groups); $x ++)
 171                                         $groups[$x] = '<' . intval($groups[$x]) . '>' ;
 172                                 $gs = implode('|', $groups);
 173                         } else {
 174                                 $gs = '<<>>' ; // Impossible to match
 175                         }
 176
 177                         $sql_extra = sprintf(
 178                                 "
 179                                 AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
 180                                 AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
 181                                 AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
 182                                 AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
 183                         ",
 184                                 intval($contact['id']),
 185                                 intval($contact['id']),
 186                                 dbesc($gs),
 187                                 dbesc($gs)
 188                         );
 189                 }
 190
 191                 if ($public_feed) {
 192                         $sort = 'DESC';
 193                 } else {
 194                         $sort = 'ASC';
 195                 }
 196
 197                 if (! strlen($last_update)) {
 198                         $last_update = 'now -30 days';
 199                 }
 200
 201                 if (isset($category)) {
 202                         $sql_post_table = sprintf(
 203                                 "INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 204                                 dbesc(protect_sprintf($category)),
 205                                 intval(TERM_OBJ_POST),
 206                                 intval(TERM_CATEGORY),
 207                                 intval($owner_id)
 208                         );
 209                         //$sql_extra .= file_tag_file_query('item',$category,'category');
 210                 }
 211
 212                 if ($public_feed) {
 213                         if (! $converse) {
 214                                 $sql_extra .= " AND `contact`.`self` = 1 ";
 215                         }
 216                 }
 217
 218                 $check_date = datetime_convert('UTC', 'UTC', $last_update, 'Y-m-d H:i:s');
 219
 220                 $r = q(
 221                         "SELECT `item`.*, `item`.`id` AS `item_id`,
 222                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 223                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 224                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 225                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 226                         FROM `item` USE INDEX (`uid_wall_changed`) $sql_post_table
 227                         STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 228                         AND (NOT `contact`.`blocked` OR `contact`.`pending`)
 229                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 230                         WHERE `item`.`uid` = %d AND `item`.`visible` AND NOT `item`.`moderated` AND `item`.`parent` != 0
 231                         AND `item`.`wall` AND `item`.`changed` > '%s'
 232                         $sql_extra
 233                         ORDER BY `item`.`parent` ".$sort.", `item`.`created` ASC LIMIT 0, 300",
 234                         intval($owner_id),
 235                         dbesc($check_date),
 236                         dbesc($sort)
 237                 );
 238
 239                 /*
 240                  * Will check further below if this actually returned results.
 241                  * We will provide an empty feed if that is the case.
 242                  */
 243
 244                 $items = $r;
 245
 246                 $doc = new DOMDocument('1.0', 'utf-8');
 247                 $doc->formatOutput = true;
 248
 249                 $alternatelink = $owner['url'];
 250
 251                 if (isset($category)) {
 252                         $alternatelink .= "/category/".$category;
 253                 }
 254
 255                 if ($public_feed) {
 256                         $author = "dfrn:owner";
 257                 } else {
 258                         $author = "author";
 259                 }
 260
 261                 $root = self::add_header($doc, $owner, $author, $alternatelink, true);
 262
 263                 /// @TODO This hook can't work anymore
 264                 //      call_hooks('atom_feed', $atom);
 265
 266                 if (!DBM::is_result($items) || $onlyheader) {
 267                         $atom = trim($doc->saveXML());
 268
 269                         call_hooks('atom_feed_end', $atom);
 270
 271                         return $atom;
 272                 }
 273
 274                 foreach ($items as $item) {
 275                         // prevent private email from leaking.
 276                         if ($item['network'] == NETWORK_MAIL) {
 277                                 continue;
 278                         }
 279
 280                         // public feeds get html, our own nodes use bbcode
 281
 282                         if ($public_feed) {
 283                                 $type = 'html';
 284                                 // catch any email that's in a public conversation and make sure it doesn't leak
 285                                 if ($item['private']) {
 286                                         continue;
 287                                 }
 288                         } else {
 289                                 $type = 'text';
 290                         }
 291
 292                         $entry = self::entry($doc, $type, $item, $owner, true);
 293                         $root->appendChild($entry);
 294                 }
 295
 296                 $atom = trim($doc->saveXML());
 297
 298                 call_hooks('atom_feed_end', $atom);
 299
 300                 return $atom;
 301         }
 302
 303         /**
 304          * @brief Generate an atom entry for a given item id
 305          *
 306          * @param int     $item_id      The item id
 307          * @param boolean $conversation Show the conversation. If false show the single post.
 308          *
 309          * @return string DFRN feed entry
 310          */
 311         public static function itemFeed($item_id, $conversation = false)
 312         {
 313                 if ($conversation) {
 314                         $condition = '`item`.`parent`';
 315                 } else {
 316                         $condition = '`item`.`id`';
 317                 }
 318
 319                 $r = q(
 320                         "SELECT `item`.*, `item`.`id` AS `item_id`,
 321                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 322                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 323                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 324                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 325                         FROM `item`
 326                         STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 327                                 AND (NOT `contact`.`blocked` OR `contact`.`pending`)
 328                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 329                         WHERE %s = %d AND `item`.`visible` AND NOT `item`.`moderated` AND `item`.`parent` != 0
 330                         AND NOT `item`.`private`",
 331                         $condition,
 332                         intval($item_id)
 333                 );
 334
 335                 if (!DBM::is_result($r)) {
 336                         killme();
 337                 }
 338
 339                 $items = $r;
 340                 $item = $r[0];
 341
 342                 $r = q(
 343                         "SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 344                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 345                         WHERE `contact`.`self` AND `user`.`uid` = %d LIMIT 1",
 346                         intval($item['uid'])
 347                 );
 348
 349                 if (!DBM::is_result($r)) {
 350                         killme();
 351                 }
 352
 353                 $owner = $r[0];
 354
 355                 $doc = new DOMDocument('1.0', 'utf-8');
 356                 $doc->formatOutput = true;
 357                 $type = 'html';
 358
 359                 if ($conversation) {
 360                         $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 361                         $doc->appendChild($root);
 362
 363                         $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 364                         $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 365                         $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 366                         $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 367                         $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 368                         $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 369                         $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 370                         $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 371                         $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 372
 373                         //$root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 374
 375                         foreach ($items as $item) {
 376                                 $entry = self::entry($doc, $type, $item, $owner, true, 0);
 377                                 $root->appendChild($entry);
 378                         }
 379                 } else {
 380                         $root = self::entry($doc, $type, $item, $owner, true, 0, true);
 381                 }
 382
 383                 $atom = trim($doc->saveXML());
 384                 return $atom;
 385         }
 386
 387         /**
 388          * @brief Create XML text for DFRN mails
 389          *
 390          * @param array $item  message elements
 391          * @param array $owner Owner record
 392          *
 393          * @return string DFRN mail
 394          * @todo Add type-hints
 395          */
 396         public static function mail($item, $owner)
 397         {
 398                 $doc = new DOMDocument('1.0', 'utf-8');
 399                 $doc->formatOutput = true;
 400
 401                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 402
 403                 $mail = $doc->createElement("dfrn:mail");
 404                 $sender = $doc->createElement("dfrn:sender");
 405
 406                 XML::addElement($doc, $sender, "dfrn:name", $owner['name']);
 407                 XML::addElement($doc, $sender, "dfrn:uri", $owner['url']);
 408                 XML::addElement($doc, $sender, "dfrn:avatar", $owner['thumb']);
 409
 410                 $mail->appendChild($sender);
 411
 412                 XML::addElement($doc, $mail, "dfrn:id", $item['uri']);
 413                 XML::addElement($doc, $mail, "dfrn:in-reply-to", $item['parent-uri']);
 414                 XML::addElement($doc, $mail, "dfrn:sentdate", datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME));
 415                 XML::addElement($doc, $mail, "dfrn:subject", $item['title']);
 416                 XML::addElement($doc, $mail, "dfrn:content", $item['body']);
 417
 418                 $root->appendChild($mail);
 419
 420                 return(trim($doc->saveXML()));
 421         }
 422
 423         /**
 424          * @brief Create XML text for DFRN friend suggestions
 425          *
 426          * @param array $item  suggestion elements
 427          * @param array $owner Owner record
 428          *
 429          * @return string DFRN suggestions
 430          * @todo Add type-hints
 431          */
 432         public static function fsuggest($item, $owner)
 433         {
 434                 $doc = new DOMDocument('1.0', 'utf-8');
 435                 $doc->formatOutput = true;
 436
 437                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 438
 439                 $suggest = $doc->createElement("dfrn:suggest");
 440
 441                 XML::addElement($doc, $suggest, "dfrn:url", $item['url']);
 442                 XML::addElement($doc, $suggest, "dfrn:name", $item['name']);
 443                 XML::addElement($doc, $suggest, "dfrn:photo", $item['photo']);
 444                 XML::addElement($doc, $suggest, "dfrn:request", $item['request']);
 445                 XML::addElement($doc, $suggest, "dfrn:note", $item['note']);
 446
 447                 $root->appendChild($suggest);
 448
 449                 return(trim($doc->saveXML()));
 450         }
 451
 452         /**
 453          * @brief Create XML text for DFRN relocations
 454          *
 455          * @param array $owner Owner record
 456          * @param int   $uid   User ID
 457          *
 458          * @return string DFRN relocations
 459          * @todo Add type-hints
 460          */
 461         public static function relocate($owner, $uid)
 462         {
 463
 464                 /* get site pubkey. this could be a new installation with no site keys*/
 465                 $pubkey = Config::get('system', 'site_pubkey');
 466                 if (! $pubkey) {
 467                         $res = new_keypair(1024);
 468                         Config::set('system', 'site_prvkey', $res['prvkey']);
 469                         Config::set('system', 'site_pubkey', $res['pubkey']);
 470                 }
 471
 472                 $rp = q(
 473                         "SELECT `resource-id` , `scale`, type FROM `photo`
 474                                 WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;",
 475                         $uid
 476                 );
 477                 $photos = array();
 478                 $ext = Photo::supportedTypes();
 479
 480                 foreach ($rp as $p) {
 481                         $photos[$p['scale']] = System::baseUrl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 482                 }
 483
 484                 unset($rp, $ext);
 485
 486                 $doc = new DOMDocument('1.0', 'utf-8');
 487                 $doc->formatOutput = true;
 488
 489                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 490
 491                 $relocate = $doc->createElement("dfrn:relocate");
 492
 493                 XML::addElement($doc, $relocate, "dfrn:url", $owner['url']);
 494                 XML::addElement($doc, $relocate, "dfrn:name", $owner['name']);
 495                 XML::addElement($doc, $relocate, "dfrn:addr", $owner['addr']);
 496                 XML::addElement($doc, $relocate, "dfrn:avatar", $owner['avatar']);
 497                 XML::addElement($doc, $relocate, "dfrn:photo", $photos[4]);
 498                 XML::addElement($doc, $relocate, "dfrn:thumb", $photos[5]);
 499                 XML::addElement($doc, $relocate, "dfrn:micro", $photos[6]);
 500                 XML::addElement($doc, $relocate, "dfrn:request", $owner['request']);
 501                 XML::addElement($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 502                 XML::addElement($doc, $relocate, "dfrn:notify", $owner['notify']);
 503                 XML::addElement($doc, $relocate, "dfrn:poll", $owner['poll']);
 504                 XML::addElement($doc, $relocate, "dfrn:sitepubkey", Config::get('system','site_pubkey'));
 505
 506                 $root->appendChild($relocate);
 507
 508                 return(trim($doc->saveXML()));
 509         }
 510
 511         /**
 512          * @brief Adds the header elements for the DFRN protocol
 513          *
 514          * @param object $doc           XML document
 515          * @param array  $owner         Owner record
 516          * @param string $authorelement Element name for the author
 517          * @param string $alternatelink link to profile or category
 518          * @param bool   $public        Is it a header for public posts?
 519          *
 520          * @return object XML root object
 521          * @todo Add type-hints
 522          */
 523         private static function add_header($doc, $owner, $authorelement, $alternatelink = "", $public = false)
 524         {
 525
 526                 if ($alternatelink == "") {
 527                         $alternatelink = $owner['url'];
 528                 }
 529
 530                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 531                 $doc->appendChild($root);
 532
 533                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 534                 $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 535                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 536                 $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 537                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 538                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 539                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 540                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 541                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 542
 543                 XML::addElement($doc, $root, "id", System::baseUrl()."/profile/".$owner["nick"]);
 544                 XML::addElement($doc, $root, "title", $owner["name"]);
 545
 546                 $attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
 547                 XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 548
 549                 $attributes = array("rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/");
 550                 XML::addElement($doc, $root, "link", "", $attributes);
 551
 552                 $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $alternatelink);
 553                 XML::addElement($doc, $root, "link", "", $attributes);
 554
 555
 556                 if ($public) {
 557                         // DFRN itself doesn't uses this. But maybe someone else wants to subscribe to the public feed.
 558                         OStatus::hublinks($doc, $root, $owner["nick"]);
 559
 560                         $attributes = array("rel" => "salmon", "href" => System::baseUrl()."/salmon/".$owner["nick"]);
 561                         XML::addElement($doc, $root, "link", "", $attributes);
 562
 563                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => System::baseUrl()."/salmon/".$owner["nick"]);
 564                         XML::addElement($doc, $root, "link", "", $attributes);
 565
 566                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => System::baseUrl()."/salmon/".$owner["nick"]);
 567                         XML::addElement($doc, $root, "link", "", $attributes);
 568                 }
 569
 570                 // For backward compatibility we keep this element
 571                 if ($owner['page-flags'] == PAGE_COMMUNITY) {
 572                         XML::addElement($doc, $root, "dfrn:community", 1);
 573                 }
 574
 575                 // The former element is replaced by this one
 576                 XML::addElement($doc, $root, "dfrn:account_type", $owner["account-type"]);
 577
 578                 /// @todo We need a way to transmit the different page flags like "PAGE_PRVGROUP"
 579
 580                 XML::addElement($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
 581
 582                 $author = self::add_author($doc, $owner, $authorelement, $public);
 583                 $root->appendChild($author);
 584
 585                 return $root;
 586         }
 587
 588         /**
 589          * @brief Adds the author element in the header for the DFRN protocol
 590          *
 591          * @param object $doc           XML document
 592          * @param array  $owner         Owner record
 593          * @param string $authorelement Element name for the author
 594          *
 595          * @return object XML author object
 596          * @todo Add type-hints
 597          */
 598         private static function add_author($doc, $owner, $authorelement, $public)
 599         {
 600                 // Is the profile hidden or shouldn't be published in the net? Then add the "hide" element
 601                 $r = q(
 602                         "SELECT `id` FROM `profile` INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 603                                 WHERE (`hidewall` OR NOT `net-publish`) AND `user`.`uid` = %d",
 604                         intval($owner['uid'])
 605                 );
 606                 if (DBM::is_result($r)) {
 607                         $hidewall = true;
 608                 } else {
 609                         $hidewall = false;
 610                 }
 611
 612                 $author = $doc->createElement($authorelement);
 613
 614                 $namdate = datetime_convert('UTC', 'UTC', $owner['name-date'].'+00:00', ATOM_TIME);
 615                 $uridate = datetime_convert('UTC', 'UTC', $owner['uri-date'].'+00:00', ATOM_TIME);
 616                 $picdate = datetime_convert('UTC', 'UTC', $owner['avatar-date'].'+00:00', ATOM_TIME);
 617
 618                 $attributes = array();
 619
 620                 if (!$public || !$hidewall) {
 621                         $attributes = array("dfrn:updated" => $namdate);
 622                 }
 623
 624                 XML::addElement($doc, $author, "name", $owner["name"], $attributes);
 625                 XML::addElement($doc, $author, "uri", System::baseUrl().'/profile/'.$owner["nickname"], $attributes);
 626                 XML::addElement($doc, $author, "dfrn:handle", $owner["addr"], $attributes);
 627
 628                 $attributes = array("rel" => "photo", "type" => "image/jpeg",
 629                                         "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 630
 631                 if (!$public || !$hidewall) {
 632                         $attributes["dfrn:updated"] = $picdate;
 633                 }
 634
 635                 XML::addElement($doc, $author, "link", "", $attributes);
 636
 637                 $attributes["rel"] = "avatar";
 638                 XML::addElement($doc, $author, "link", "", $attributes);
 639
 640                 if ($hidewall) {
 641                         XML::addElement($doc, $author, "dfrn:hide", "true");
 642                 }
 643
 644                 // The following fields will only be generated if the data isn't meant for a public feed
 645                 if ($public) {
 646                         return $author;
 647                 }
 648
 649                 $birthday = feed_birthday($owner['uid'], $owner['timezone']);
 650
 651                 if ($birthday) {
 652                         XML::addElement($doc, $author, "dfrn:birthday", $birthday);
 653                 }
 654
 655                 // Only show contact details when we are allowed to
 656                 $r = q(
 657                         "SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`,
 658                                 `user`.`timezone`, `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
 659                                 `profile`.`pub_keywords`, `profile`.`xmpp`, `profile`.`dob`
 660                         FROM `profile`
 661                                 INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 662                                 WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 663                         intval($owner['uid'])
 664                 );
 665                 if (DBM::is_result($r)) {
 666                         $profile = $r[0];
 667
 668                         XML::addElement($doc, $author, "poco:displayName", $profile["name"]);
 669                         XML::addElement($doc, $author, "poco:updated", $namdate);
 670
 671                         if (trim($profile["dob"]) > '0001-01-01') {
 672                                 XML::addElement($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 673                         }
 674
 675                         XML::addElement($doc, $author, "poco:note", $profile["about"]);
 676                         XML::addElement($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 677
 678                         $savetz = date_default_timezone_get();
 679                         date_default_timezone_set($profile["timezone"]);
 680                         XML::addElement($doc, $author, "poco:utcOffset", date("P"));
 681                         date_default_timezone_set($savetz);
 682
 683                         if (trim($profile["homepage"]) != "") {
 684                                 $urls = $doc->createElement("poco:urls");
 685                                 XML::addElement($doc, $urls, "poco:type", "homepage");
 686                                 XML::addElement($doc, $urls, "poco:value", $profile["homepage"]);
 687                                 XML::addElement($doc, $urls, "poco:primary", "true");
 688                                 $author->appendChild($urls);
 689                         }
 690
 691                         if (trim($profile["pub_keywords"]) != "") {
 692                                 $keywords = explode(",", $profile["pub_keywords"]);
 693
 694                                 foreach ($keywords as $keyword) {
 695                                         XML::addElement($doc, $author, "poco:tags", trim($keyword));
 696                                 }
 697                         }
 698
 699                         if (trim($profile["xmpp"]) != "") {
 700                                 $ims = $doc->createElement("poco:ims");
 701                                 XML::addElement($doc, $ims, "poco:type", "xmpp");
 702                                 XML::addElement($doc, $ims, "poco:value", $profile["xmpp"]);
 703                                 XML::addElement($doc, $ims, "poco:primary", "true");
 704                                 $author->appendChild($ims);
 705                         }
 706
 707                         if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 708                                 $element = $doc->createElement("poco:address");
 709
 710                                 XML::addElement($doc, $element, "poco:formatted", Profile::formatLocation($profile));
 711
 712                                 if (trim($profile["locality"]) != "") {
 713                                         XML::addElement($doc, $element, "poco:locality", $profile["locality"]);
 714                                 }
 715
 716                                 if (trim($profile["region"]) != "") {
 717                                         XML::addElement($doc, $element, "poco:region", $profile["region"]);
 718                                 }
 719
 720                                 if (trim($profile["country-name"]) != "") {
 721                                         XML::addElement($doc, $element, "poco:country", $profile["country-name"]);
 722                                 }
 723
 724                                 $author->appendChild($element);
 725                         }
 726                 }
 727
 728                 return $author;
 729         }
 730
 731         /**
 732          * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 733          *
 734          * @param object $doc         XML document
 735          * @param string $element     Element name for the author
 736          * @param string $contact_url Link of the contact
 737          * @param array  $item        Item elements
 738          *
 739          * @return object XML author object
 740          * @todo Add type-hints
 741          */
 742         private static function add_entry_author($doc, $element, $contact_url, $item)
 743         {
 744                 $contact = Contact::getDetailsByURL($contact_url, $item["uid"]);
 745
 746                 $author = $doc->createElement($element);
 747                 XML::addElement($doc, $author, "name", $contact["name"]);
 748                 XML::addElement($doc, $author, "uri", $contact["url"]);
 749                 XML::addElement($doc, $author, "dfrn:handle", $contact["addr"]);
 750
 751                 /// @Todo
 752                 /// - Check real image type and image size
 753                 /// - Check which of these boths elements we should use
 754                 $attributes = array(
 755                                 "rel" => "photo",
 756                                 "type" => "image/jpeg",
 757                                 "media:width" => 80,
 758                                 "media:height" => 80,
 759                                 "href" => $contact["photo"]);
 760                 XML::addElement($doc, $author, "link", "", $attributes);
 761
 762                 $attributes = array(
 763                                 "rel" => "avatar",
 764                                 "type" => "image/jpeg",
 765                                 "media:width" => 80,
 766                                 "media:height" => 80,
 767                                 "href" => $contact["photo"]);
 768                 XML::addElement($doc, $author, "link", "", $attributes);
 769
 770                 return $author;
 771         }
 772
 773         /**
 774          * @brief Adds the activity elements
 775          *
 776          * @param object $doc      XML document
 777          * @param string $element  Element name for the activity
 778          * @param string $activity activity value
 779          *
 780          * @return object XML activity object
 781          * @todo Add type-hints
 782          */
 783         private static function create_activity($doc, $element, $activity)
 784         {
 785                 if ($activity) {
 786                         $entry = $doc->createElement($element);
 787
 788                         $r = parse_xml_string($activity, false);
 789                         if (!$r) {
 790                                 return false;
 791                         }
 792                         if ($r->type) {
 793                                 XML::addElement($doc, $entry, "activity:object-type", $r->type);
 794                         }
 795                         if ($r->id) {
 796                                 XML::addElement($doc, $entry, "id", $r->id);
 797                         }
 798                         if ($r->title) {
 799                                 XML::addElement($doc, $entry, "title", $r->title);
 800                         }
 801
 802                         if ($r->link) {
 803                                 if (substr($r->link, 0, 1) == '<') {
 804                                         if (strstr($r->link, '&') && (! strstr($r->link, '&amp;'))) {
 805                                                 $r->link = str_replace('&', '&amp;', $r->link);
 806                                         }
 807
 808                                         $r->link = preg_replace('/\<link(.*?)\"\>/', '<link$1"/>', $r->link);
 809
 810                                         // XML does need a single element as root element so we add a dummy element here
 811                                         $data = parse_xml_string("<dummy>" . $r->link . "</dummy>", false);
 812                                         if (is_object($data)) {
 813                                                 foreach ($data->link AS $link) {
 814                                                         $attributes = array();
 815                                                         foreach ($link->attributes() as $parameter => $value) {
 816                                                                 $attributes[$parameter] = $value;
 817                                                         }
 818                                                         XML::addElement($doc, $entry, "link", "", $attributes);
 819                                                 }
 820                                         }
 821                                 } else {
 822                                         $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $r->link);
 823                                         XML::addElement($doc, $entry, "link", "", $attributes);
 824                                 }
 825                         }
 826                         if ($r->content) {
 827                                 XML::addElement($doc, $entry, "content", bbcode($r->content), array("type" => "html"));
 828                         }
 829
 830                         return $entry;
 831                 }
 832
 833                 return false;
 834         }
 835
 836         /**
 837          * @brief Adds the elements for attachments
 838          *
 839          * @param object $doc  XML document
 840          * @param object $root XML root
 841          * @param array  $item Item element
 842          *
 843          * @return object XML attachment object
 844          * @todo Add type-hints
 845          */
 846         private static function get_attachment($doc, $root, $item)
 847         {
 848                 $arr = explode('[/attach],', $item['attach']);
 849                 if (count($arr)) {
 850                         foreach ($arr as $r) {
 851                                 $matches = false;
 852                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
 853                                 if ($cnt) {
 854                                         $attributes = array("rel" => "enclosure",
 855                                                         "href" => $matches[1],
 856                                                         "type" => $matches[3]);
 857
 858                                         if (intval($matches[2])) {
 859                                                 $attributes["length"] = intval($matches[2]);
 860                                         }
 861
 862                                         if (trim($matches[4]) != "") {
 863                                                 $attributes["title"] = trim($matches[4]);
 864                                         }
 865
 866                                         XML::addElement($doc, $root, "link", "", $attributes);
 867                                 }
 868                         }
 869                 }
 870         }
 871
 872         /**
 873          * @brief Adds the "entry" elements for the DFRN protocol
 874          *
 875          * @param object $doc     XML document
 876          * @param string $type    "text" or "html"
 877          * @param array  $item    Item element
 878          * @param array  $owner   Owner record
 879          * @param bool   $comment Trigger the sending of the "comment" element
 880          * @param int    $cid     Contact ID of the recipient
 881          * @param bool   $single  If set, the entry is created as an XML document with a single "entry" element
 882          *
 883          * @return object XML entry object
 884          * @todo Add type-hints
 885          */
 886         private static function entry($doc, $type, $item, $owner, $comment = false, $cid = 0, $single = false)
 887         {
 888                 $mentioned = array();
 889
 890                 if (!$item['parent']) {
 891                         return;
 892                 }
 893
 894                 if ($item['deleted']) {
 895                         $attributes = array("ref" => $item['uri'], "when" => datetime_convert('UTC', 'UTC', $item['edited'] . '+00:00', ATOM_TIME));
 896                         return XML::createElement($doc, "at:deleted-entry", "", $attributes);
 897                 }
 898
 899                 if (!$single) {
 900                         $entry = $doc->createElement("entry");
 901                 } else {
 902                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, 'entry');
 903                         $doc->appendChild($entry);
 904
 905                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 906                         $entry->setAttribute("xmlns:at", NAMESPACE_TOMB);
 907                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 908                         $entry->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 909                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 910                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 911                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
 912                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 913                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 914                 }
 915
 916                 if ($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid']) {
 917                         $body = fix_private_photos($item['body'], $owner['uid'], $item, $cid);
 918                 } else {
 919                         $body = $item['body'];
 920                 }
 921
 922                 // Remove the abstract element. It is only locally important.
 923                 $body = remove_abstract($body);
 924
 925                 if ($type == 'html') {
 926                         $htmlbody = $body;
 927
 928                         if ($item['title'] != "") {
 929                                 $htmlbody = "[b]".$item['title']."[/b]\n\n".$htmlbody;
 930                         }
 931
 932                         $htmlbody = bbcode($htmlbody, false, false, 7);
 933                 }
 934
 935                 $author = self::add_entry_author($doc, "author", $item["author-link"], $item);
 936                 $entry->appendChild($author);
 937
 938                 $dfrnowner = self::add_entry_author($doc, "dfrn:owner", $item["owner-link"], $item);
 939                 $entry->appendChild($dfrnowner);
 940
 941                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 942                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 943                         $parent = q("SELECT `guid`,`plink` FROM `item` WHERE `uri` = '%s' AND `uid` = %d", dbesc($parent_item), intval($item['uid']));
 944                         $attributes = array("ref" => $parent_item, "type" => "text/html",
 945                                                 "href" => $parent[0]['plink'],
 946                                                 "dfrn:diaspora_guid" => $parent[0]['guid']);
 947                         XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
 948                 }
 949
 950                 // Add conversation data. This is used for OStatus
 951                 $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
 952                 $conversation_uri = $conversation_href;
 953
 954                 if (isset($parent_item)) {
 955                         $r = dba::fetch_first("SELECT `conversation-uri`, `conversation-href` FROM `conversation` WHERE `item-uri` = ?", $item['parent-uri']);
 956                         if (DBM::is_result($r)) {
 957                                 if ($r['conversation-uri'] != '') {
 958                                         $conversation_uri = $r['conversation-uri'];
 959                                 }
 960                                 if ($r['conversation-href'] != '') {
 961                                         $conversation_href = $r['conversation-href'];
 962                                 }
 963                         }
 964                 }
 965
 966                 $attributes = array(
 967                                 "href" => $conversation_href,
 968                                 "ref" => $conversation_uri);
 969
 970                 XML::addElement($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
 971
 972                 XML::addElement($doc, $entry, "id", $item["uri"]);
 973                 XML::addElement($doc, $entry, "title", $item["title"]);
 974
 975                 XML::addElement($doc, $entry, "published", datetime_convert("UTC", "UTC", $item["created"] . "+00:00", ATOM_TIME));
 976                 XML::addElement($doc, $entry, "updated", datetime_convert("UTC", "UTC", $item["edited"] . "+00:00", ATOM_TIME));
 977
 978                 // "dfrn:env" is used to read the content
 979                 XML::addElement($doc, $entry, "dfrn:env", base64url_encode($body, true));
 980
 981                 // The "content" field is not read by the receiver. We could remove it when the type is "text"
 982                 // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
 983                 XML::addElement($doc, $entry, "content", (($type == 'html') ? $htmlbody : $body), array("type" => $type));
 984
 985                 // We save this value in "plink". Maybe we should read it from there as well?
 986                 XML::addElement(
 987                         $doc,
 988                         $entry,
 989                         "link",
 990                         "",
 991                         array("rel" => "alternate", "type" => "text/html",
 992                                  "href" => System::baseUrl() . "/display/" . $item["guid"])
 993                 );
 994
 995                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
 996                 // It is included in the rewritten code for completeness
 997                 if ($comment) {
 998                         XML::addElement($doc, $entry, "dfrn:comment-allow", intval($item['last-child']));
 999                 }
1000
1001                 if ($item['location']) {
1002                         XML::addElement($doc, $entry, "dfrn:location", $item['location']);
1003                 }
1004
1005                 if ($item['coord']) {
1006                         XML::addElement($doc, $entry, "georss:point", $item['coord']);
1007                 }
1008
1009                 if (($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid'])) {
1010                         XML::addElement($doc, $entry, "dfrn:private", (($item['private']) ? $item['private'] : 1));
1011                 }
1012
1013                 if ($item['extid']) {
1014                         XML::addElement($doc, $entry, "dfrn:extid", $item['extid']);
1015                 }
1016
1017                 if ($item['bookmark']) {
1018                         XML::addElement($doc, $entry, "dfrn:bookmark", "true");
1019                 }
1020
1021                 if ($item['app']) {
1022                         XML::addElement($doc, $entry, "statusnet:notice_info", "", array("local_id" => $item['id'], "source" => $item['app']));
1023                 }
1024
1025                 XML::addElement($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
1026
1027                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
1028                 // It is needed for relayed comments to Diaspora.
1029                 if ($item['signed_text']) {
1030                         $sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
1031                         XML::addElement($doc, $entry, "dfrn:diaspora_signature", $sign);
1032                 }
1033
1034                 XML::addElement($doc, $entry, "activity:verb", construct_verb($item));
1035
1036                 if ($item['object-type'] != "") {
1037                         XML::addElement($doc, $entry, "activity:object-type", $item['object-type']);
1038                 } elseif ($item['id'] == $item['parent']) {
1039                         XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
1040                 } else {
1041                         XML::addElement($doc, $entry, "activity:object-type", ACTIVITY_OBJ_COMMENT);
1042                 }
1043
1044                 $actobj = self::create_activity($doc, "activity:object", $item['object']);
1045                 if ($actobj) {
1046                         $entry->appendChild($actobj);
1047                 }
1048
1049                 $actarg = self::create_activity($doc, "activity:target", $item['target']);
1050                 if ($actarg) {
1051                         $entry->appendChild($actarg);
1052                 }
1053
1054                 $tags = item_getfeedtags($item);
1055
1056                 if (count($tags)) {
1057                         foreach ($tags as $t) {
1058                                 if (($type != 'html') || ($t[0] != "@")) {
1059                                         XML::addElement($doc, $entry, "category", "", array("scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]));
1060                                 }
1061                         }
1062                 }
1063
1064                 if (count($tags)) {
1065                         foreach ($tags as $t) {
1066                                 if ($t[0] == "@") {
1067                                         $mentioned[$t[1]] = $t[1];
1068                                 }
1069                         }
1070                 }
1071
1072                 foreach ($mentioned as $mention) {
1073                         $r = q(
1074                                 "SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1075                                 intval($owner["uid"]),
1076                                 dbesc(normalise_link($mention))
1077                         );
1078
1079                         if (DBM::is_result($r) && ($r[0]["forum"] || $r[0]["prv"])) {
1080                                 XML::addElement(
1081                                         $doc,
1082                                         $entry,
1083                                         "link",
1084                                         "",
1085                                         array("rel" => "mentioned",
1086                                                         "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
1087                                                         "href" => $mention)
1088                                 );
1089                         } else {
1090                                 XML::addElement(
1091                                         $doc,
1092                                         $entry,
1093                                         "link",
1094                                         "",
1095                                         array("rel" => "mentioned",
1096                                                         "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
1097                                                         "href" => $mention)
1098                                 );
1099                         }
1100                 }
1101
1102                 self::get_attachment($doc, $entry, $item);
1103
1104                 return $entry;
1105         }
1106
1107         /**
1108          * @brief encrypts data via AES
1109          *
1110          * @param string $data The data that is to be encrypted
1111          * @param string $key  The AES key
1112          *
1113          * @return string encrypted data
1114          */
1115         private static function aes_encrypt($data, $key)
1116         {
1117                 return openssl_encrypt($data, 'aes-128-ecb', $key, OPENSSL_RAW_DATA);
1118         }
1119
1120         /**
1121          * @brief decrypts data via AES
1122          *
1123          * @param string $encrypted The encrypted data
1124          * @param string $key       The AES key
1125          *
1126          * @return string decrypted data
1127          */
1128         public static function aes_decrypt($encrypted, $key)
1129         {
1130                 return openssl_decrypt($encrypted, 'aes-128-ecb', $key, OPENSSL_RAW_DATA);
1131         }
1132
1133         /**
1134          * @brief Delivers the atom content to the contacts
1135          *
1136          * @param array  $owner    Owner record
1137          * @param array  $contact  Contact record of the receiver
1138          * @param string $atom     Content that will be transmitted
1139          * @param bool   $dissolve (to be documented)
1140          *
1141          * @return int Deliver status. -1 means an error.
1142          * @todo Add array type-hint for $owner, $contact
1143          */
1144         public static function deliver($owner, $contact, $atom, $dissolve = false)
1145         {
1146                 $a = get_app();
1147
1148                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
1149
1150                 if ($contact['duplex'] && $contact['dfrn-id']) {
1151                         $idtosend = '0:' . $orig_id;
1152                 }
1153                 if ($contact['duplex'] && $contact['issued-id']) {
1154                         $idtosend = '1:' . $orig_id;
1155                 }
1156
1157                 $rino = Config::get('system', 'rino_encrypt');
1158                 $rino = intval($rino);
1159
1160                 logger("Local rino version: ". $rino, LOGGER_DEBUG);
1161
1162                 $ssl_val = intval(Config::get('system', 'ssl_policy'));
1163                 $ssl_policy = '';
1164
1165                 switch ($ssl_val) {
1166                         case SSL_POLICY_FULL:
1167                                 $ssl_policy = 'full';
1168                                 break;
1169                         case SSL_POLICY_SELFSIGN:
1170                                 $ssl_policy = 'self';
1171                                 break;
1172                         case SSL_POLICY_NONE:
1173                         default:
1174                                 $ssl_policy = 'none';
1175                                 break;
1176                 }
1177
1178                 $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
1179
1180                 logger('dfrn_deliver: ' . $url);
1181
1182                 $ret = z_fetch_url($url);
1183
1184                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1185                         return -2; // timed out
1186                 }
1187
1188                 $xml = $ret['body'];
1189
1190                 $curl_stat = $a->get_curl_code();
1191                 if (!$curl_stat) {
1192                         return -3; // timed out
1193                 }
1194
1195                 logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
1196
1197                 if (! $xml) {
1198                         return 3;
1199                 }
1200
1201                 if (strpos($xml, '<?xml') === false) {
1202                         logger('dfrn_deliver: no valid XML returned');
1203                         logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
1204                         return 3;
1205                 }
1206
1207                 $res = parse_xml_string($xml);
1208
1209                 if ((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id))) {
1210                         return (($res->status) ? $res->status : 3);
1211                 }
1212
1213                 $postvars     = array();
1214                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
1215                 $challenge    = hex2bin((string) $res->challenge);
1216                 $perm         = (($res->perm) ? $res->perm : null);
1217                 $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
1218                 $rino_remote_version = intval($res->rino);
1219                 $page         = (($owner['page-flags'] == PAGE_COMMUNITY) ? 1 : 0);
1220
1221                 logger("Remote rino version: ".$rino_remote_version." for ".$contact["url"], LOGGER_DEBUG);
1222
1223                 if ($owner['page-flags'] == PAGE_PRVGROUP) {
1224                         $page = 2;
1225                 }
1226
1227                 $final_dfrn_id = '';
1228
1229                 if ($perm) {
1230                         if ((($perm == 'rw') && (! intval($contact['writable'])))
1231                                 || (($perm == 'r') && (intval($contact['writable'])))
1232                         ) {
1233                                 q(
1234                                         "update contact set writable = %d where id = %d",
1235                                         intval(($perm == 'rw') ? 1 : 0),
1236                                         intval($contact['id'])
1237                                 );
1238                                 $contact['writable'] = (string) 1 - intval($contact['writable']);
1239                         }
1240                 }
1241
1242                 if (($contact['duplex'] && strlen($contact['pubkey']))
1243                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1244                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))
1245                 ) {
1246                         openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
1247                         openssl_public_decrypt($challenge, $postvars['challenge'], $contact['pubkey']);
1248                 } else {
1249                         openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
1250                         openssl_private_decrypt($challenge, $postvars['challenge'], $contact['prvkey']);
1251                 }
1252
1253                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
1254
1255                 if (strpos($final_dfrn_id, ':') == 1) {
1256                         $final_dfrn_id = substr($final_dfrn_id, 2);
1257                 }
1258
1259                 if ($final_dfrn_id != $orig_id) {
1260                         logger('dfrn_deliver: wrong dfrn_id.');
1261                         // did not decode properly - cannot trust this site
1262                         return 3;
1263                 }
1264
1265                 $postvars['dfrn_id']      = $idtosend;
1266                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
1267                 if ($dissolve) {
1268                         $postvars['dissolve'] = '1';
1269                 }
1270
1271
1272                 if ((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1273                         $postvars['data'] = $atom;
1274                         $postvars['perm'] = 'rw';
1275                 } else {
1276                         $postvars['data'] = str_replace('<dfrn:comment-allow>1', '<dfrn:comment-allow>0', $atom);
1277                         $postvars['perm'] = 'r';
1278                 }
1279
1280                 $postvars['ssl_policy'] = $ssl_policy;
1281
1282                 if ($page) {
1283                         $postvars['page'] = $page;
1284                 }
1285
1286
1287                 if ($rino > 0 && $rino_remote_version > 0 && (! $dissolve)) {
1288                         logger('rino version: '. $rino_remote_version);
1289
1290                         switch ($rino_remote_version) {
1291                                 case 1:
1292                                         // Deprecated rino version!
1293                                         $key = openssl_random_pseudo_bytes(16);
1294                                         $data = self::aes_encrypt($postvars['data'], $key);
1295                                         break;
1296                                 case 2:
1297                                         // RINO 2 based on php-encryption
1298                                         try {
1299                                                 $key = \Crypto::createNewRandomKey();
1300                                         } catch (\CryptoTestFailedException $ex) {
1301                                                 logger('Cannot safely create a key');
1302                                                 return -4;
1303                                         } catch (\CannotPerformOperationException $ex) {
1304                                                 logger('Cannot safely create a key');
1305                                                 return -5;
1306                                         }
1307                                         try {
1308                                                 $data = \Crypto::encrypt($postvars['data'], $key);
1309                                         } catch (\CryptoTestFailedException $ex) {
1310                                                 logger('Cannot safely perform encryption');
1311                                                 return -6;
1312                                         } catch (\CannotPerformOperationException $ex) {
1313                                                 logger('Cannot safely perform encryption');
1314                                                 return -7;
1315                                         }
1316                                         break;
1317                                 default:
1318                                         logger("rino: invalid requested version '$rino_remote_version'");
1319                                         return -8;
1320                         }
1321
1322                         $postvars['rino'] = $rino_remote_version;
1323                         $postvars['data'] = bin2hex($data);
1324
1325                         //logger('rino: sent key = ' . $key, LOGGER_DEBUG);
1326
1327
1328                         if ($dfrn_version >= 2.1) {
1329                                 if (($contact['duplex'] && strlen($contact['pubkey']))
1330                                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1331                                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))
1332                                 ) {
1333                                         openssl_public_encrypt($key, $postvars['key'], $contact['pubkey']);
1334                                 } else {
1335                                         openssl_private_encrypt($key, $postvars['key'], $contact['prvkey']);
1336                                 }
1337                         } else {
1338                                 if (($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1339                                         openssl_private_encrypt($key, $postvars['key'], $contact['prvkey']);
1340                                 } else {
1341                                         openssl_public_encrypt($key, $postvars['key'], $contact['pubkey']);
1342                                 }
1343                         }
1344
1345                         logger('md5 rawkey ' . md5($postvars['key']));
1346
1347                         $postvars['key'] = bin2hex($postvars['key']);
1348                 }
1349
1350
1351                 logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars, true), LOGGER_DATA);
1352
1353                 $xml = post_url($contact['notify'], $postvars);
1354
1355                 logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
1356
1357                 $curl_stat = $a->get_curl_code();
1358                 if ((!$curl_stat) || (!strlen($xml))) {
1359                         return -9; // timed out
1360                 }
1361
1362                 if (($curl_stat == 503) && (stristr($a->get_curl_headers(), 'retry-after'))) {
1363                         return -10;
1364                 }
1365
1366                 if (strpos($xml, '<?xml') === false) {
1367                         logger('dfrn_deliver: phase 2: no valid XML returned');
1368                         logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
1369                         return 3;
1370                 }
1371
1372                 if ($contact['term-date'] > NULL_DATE) {
1373                         logger("dfrn_deliver: $url back from the dead - removing mark for death");
1374                         Contact::unmarkForArchival($contact);
1375                 }
1376
1377                 $res = parse_xml_string($xml);
1378
1379                 if (!isset($res->status)) {
1380                         return -11;
1381                 }
1382
1383                 if (!empty($res->message)) {
1384                         logger('Delivery returned status '.$res->status.' - '.$res->message, LOGGER_DEBUG);
1385                 }
1386
1387                 return intval($res->status);
1388         }
1389
1390         /**
1391          * @brief Add new birthday event for this person
1392          *
1393          * @param array  $contact  Contact record
1394          * @param string $birthday Birthday of the contact
1395          * @todo Add array type-hint for $contact
1396          */
1397         private static function birthday_event($contact, $birthday)
1398         {
1399                 // Check for duplicates
1400                 $r = q(
1401                         "SELECT `id` FROM `event` WHERE `uid` = %d AND `cid` = %d AND `start` = '%s' AND `type` = '%s' LIMIT 1",
1402                         intval($contact["uid"]),
1403                         intval($contact["id"]),
1404                         dbesc(datetime_convert("UTC", "UTC", $birthday)),
1405                         dbesc("birthday")
1406                 );
1407
1408                 if (DBM::is_result($r)) {
1409                         return;
1410                 }
1411
1412                 logger("updating birthday: ".$birthday." for contact ".$contact["id"]);
1413
1414                 $bdtext = sprintf(t("%s\'s birthday"), $contact["name"]);
1415                 $bdtext2 = sprintf(t("Happy Birthday %s"), " [url=".$contact["url"]."]".$contact["name"]."[/url]") ;
1416
1417                 $r = q(
1418                         "INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`)
1419                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s') ",
1420                         intval($contact["uid"]),
1421                         intval($contact["id"]),
1422                         dbesc(datetime_convert()),
1423                         dbesc(datetime_convert()),
1424                         dbesc(datetime_convert("UTC", "UTC", $birthday)),
1425                         dbesc(datetime_convert("UTC", "UTC", $birthday . " + 1 day ")),
1426                         dbesc($bdtext),
1427                         dbesc($bdtext2),
1428                         dbesc("birthday")
1429                 );
1430         }
1431
1432         /**
1433          * @brief Fetch the author data from head or entry items
1434          *
1435          * @param object $xpath     XPath object
1436          * @param object $context   In which context should the data be searched
1437          * @param array  $importer  Record of the importer user mixed with contact of the content
1438          * @param string $element   Element name from which the data is fetched
1439          * @param bool   $onlyfetch Should the data only be fetched or should it update the contact record as well
1440          *
1441          * @return Returns an array with relevant data of the author
1442          * @todo Find good type-hints for all parameter
1443          */
1444         private static function fetchauthor($xpath, $context, $importer, $element, $onlyfetch, $xml = "")
1445         {
1446                 $author = array();
1447                 $author["name"] = $xpath->evaluate($element."/atom:name/text()", $context)->item(0)->nodeValue;
1448                 $author["link"] = $xpath->evaluate($element."/atom:uri/text()", $context)->item(0)->nodeValue;
1449
1450                 $r = q(
1451                         "SELECT `id`, `uid`, `url`, `network`, `avatar-date`, `name-date`, `uri-date`, `addr`,
1452                                 `name`, `nick`, `about`, `location`, `keywords`, `xmpp`, `bdyear`, `bd`, `hidden`, `contact-type`
1453                                 FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND `network` != '%s'",
1454                         intval($importer["uid"]),
1455                         dbesc(normalise_link($author["link"])),
1456                         dbesc(NETWORK_STATUSNET)
1457                 );
1458
1459                 if (DBM::is_result($r)) {
1460                         $contact = $r[0];
1461                         $author["contact-id"] = $r[0]["id"];
1462                         $author["network"] = $r[0]["network"];
1463                 } else {
1464                         if (!$onlyfetch) {
1465                                 logger("Contact ".$author["link"]." wasn't found for user ".$importer["uid"]." XML: ".$xml, LOGGER_DEBUG);
1466                         }
1467
1468                         $author["contact-id"] = $importer["id"];
1469                         $author["network"] = $importer["network"];
1470                         $onlyfetch = true;
1471                 }
1472
1473                 // Until now we aren't serving different sizes - but maybe later
1474                 $avatarlist = array();
1475                 /// @todo check if "avatar" or "photo" would be the best field in the specification
1476                 $avatars = $xpath->query($element."/atom:link[@rel='avatar']", $context);
1477                 foreach ($avatars AS $avatar) {
1478                         $href = "";
1479                         $width = 0;
1480                         foreach ($avatar->attributes AS $attributes) {
1481                                 /// @TODO Rewrite these similar if () to one switch
1482                                 if ($attributes->name == "href") {
1483                                         $href = $attributes->textContent;
1484                                 }
1485                                 if ($attributes->name == "width") {
1486                                         $width = $attributes->textContent;
1487                                 }
1488                                 if ($attributes->name == "updated") {
1489                                         $contact["avatar-date"] = $attributes->textContent;
1490                                 }
1491                         }
1492                         if (($width > 0) && ($href != "")) {
1493                                 $avatarlist[$width] = $href;
1494                         }
1495                 }
1496                 if (count($avatarlist) > 0) {
1497                         krsort($avatarlist);
1498                         $author["avatar"] = current($avatarlist);
1499                 }
1500
1501                 if (DBM::is_result($r) && !$onlyfetch) {
1502                         logger("Check if contact details for contact " . $r[0]["id"] . " (" . $r[0]["nick"] . ") have to be updated.", LOGGER_DEBUG);
1503
1504                         $poco = array("url" => $contact["url"]);
1505
1506                         // When was the last change to name or uri?
1507                         $name_element = $xpath->query($element . "/atom:name", $context)->item(0);
1508                         foreach ($name_element->attributes AS $attributes) {
1509                                 if ($attributes->name == "updated") {
1510                                         $poco["name-date"] = $attributes->textContent;
1511                                 }
1512                         }
1513
1514                         $link_element = $xpath->query($element . "/atom:link", $context)->item(0);
1515                         foreach ($link_element->attributes AS $attributes) {
1516                                 if ($attributes->name == "updated") {
1517                                         $poco["uri-date"] = $attributes->textContent;
1518                                 }
1519                         }
1520
1521                         // Update contact data
1522                         $value = $xpath->evaluate($element . "/dfrn:handle/text()", $context)->item(0)->nodeValue;
1523                         if ($value != "") {
1524                                 $poco["addr"] = $value;
1525                         }
1526
1527                         $value = $xpath->evaluate($element . "/poco:displayName/text()", $context)->item(0)->nodeValue;
1528                         if ($value != "") {
1529                                 $poco["name"] = $value;
1530                         }
1531
1532                         $value = $xpath->evaluate($element . "/poco:preferredUsername/text()", $context)->item(0)->nodeValue;
1533                         if ($value != "") {
1534                                 $poco["nick"] = $value;
1535                         }
1536
1537                         $value = $xpath->evaluate($element . "/poco:note/text()", $context)->item(0)->nodeValue;
1538                         if ($value != "") {
1539                                 $poco["about"] = $value;
1540                         }
1541
1542                         $value = $xpath->evaluate($element . "/poco:address/poco:formatted/text()", $context)->item(0)->nodeValue;
1543                         if ($value != "") {
1544                                 $poco["location"] = $value;
1545                         }
1546
1547                         /// @todo Only search for elements with "poco:type" = "xmpp"
1548                         $value = $xpath->evaluate($element . "/poco:ims/poco:value/text()", $context)->item(0)->nodeValue;
1549                         if ($value != "") {
1550                                 $poco["xmpp"] = $value;
1551                         }
1552
1553                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1554                         /// - poco:utcOffset
1555                         /// - poco:urls
1556                         /// - poco:locality
1557                         /// - poco:region
1558                         /// - poco:country
1559
1560                         // If the "hide" element is present then the profile isn't searchable.
1561                         $hide = intval($xpath->evaluate($element . "/dfrn:hide/text()", $context)->item(0)->nodeValue == "true");
1562
1563                         logger("Hidden status for contact " . $contact["url"] . ": " . $hide, LOGGER_DEBUG);
1564
1565                         // If the contact isn't searchable then set the contact to "hidden".
1566                         // Problem: This can be manually overridden by the user.
1567                         if ($hide) {
1568                                 $contact["hidden"] = true;
1569                         }
1570
1571                         // Save the keywords into the contact table
1572                         $tags = array();
1573                         $tagelements = $xpath->evaluate($element . "/poco:tags/text()", $context);
1574                         foreach ($tagelements AS $tag) {
1575                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1576                         }
1577
1578                         if (count($tags)) {
1579                                 $poco["keywords"] = implode(", ", $tags);
1580                         }
1581
1582                         // "dfrn:birthday" contains the birthday converted to UTC
1583                         $old_bdyear = $contact["bdyear"];
1584
1585                         $birthday = $xpath->evaluate($element . "/dfrn:birthday/text()", $context)->item(0)->nodeValue;
1586
1587                         if (strtotime($birthday) > time()) {
1588                                 $bd_timestamp = strtotime($birthday);
1589
1590                                 $poco["bdyear"] = date("Y", $bd_timestamp);
1591                         }
1592
1593                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1594                         $value = $xpath->evaluate($element . "/poco:birthday/text()", $context)->item(0)->nodeValue;
1595
1596                         if (!in_array($value, array("", "0000-00-00", "0001-01-01"))) {
1597                                 $bdyear = date("Y");
1598                                 $value = str_replace("0000", $bdyear, $value);
1599
1600                                 if (strtotime($value) < time()) {
1601                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1602                                         $bdyear = $bdyear + 1;
1603                                 }
1604
1605                                 $poco["bd"] = $value;
1606                         }
1607
1608                         $contact = array_merge($contact, $poco);
1609
1610                         if ($old_bdyear != $contact["bdyear"]) {
1611                                 self::birthday_event($contact, $birthday);
1612                         }
1613
1614                         // Get all field names
1615                         $fields = array();
1616                         foreach ($r[0] AS $field => $data) {
1617                                 $fields[$field] = $data;
1618                         }
1619
1620                         unset($fields["id"]);
1621                         unset($fields["uid"]);
1622                         unset($fields["url"]);
1623                         unset($fields["avatar-date"]);
1624                         unset($fields["name-date"]);
1625                         unset($fields["uri-date"]);
1626
1627                         // Update check for this field has to be done differently
1628                         $datefields = array("name-date", "uri-date");
1629                         foreach ($datefields AS $field) {
1630                                 if (strtotime($contact[$field]) > strtotime($r[0][$field])) {
1631                                         logger("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $r[0][$field] . "'", LOGGER_DEBUG);
1632                                         $update = true;
1633                                 }
1634                         }
1635
1636                         foreach ($fields AS $field => $data) {
1637                                 if ($contact[$field] != $r[0][$field]) {
1638                                         logger("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $r[0][$field] . "'", LOGGER_DEBUG);
1639                                         $update = true;
1640                                 }
1641                         }
1642
1643                         if ($update) {
1644                                 logger("Update contact data for contact " . $contact["id"] . " (" . $contact["nick"] . ")", LOGGER_DEBUG);
1645
1646                                 q(
1647                                         "UPDATE `contact` SET `name` = '%s', `nick` = '%s', `about` = '%s', `location` = '%s',
1648                                         `addr` = '%s', `keywords` = '%s', `bdyear` = '%s', `bd` = '%s', `hidden` = %d,
1649                                         `xmpp` = '%s', `name-date`  = '%s', `uri-date` = '%s'
1650                                         WHERE `id` = %d AND `network` = '%s'",
1651                                         dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["about"]),     dbesc($contact["location"]),
1652                                         dbesc($contact["addr"]), dbesc($contact["keywords"]), dbesc($contact["bdyear"]),
1653                                         dbesc($contact["bd"]), intval($contact["hidden"]), dbesc($contact["xmpp"]),
1654                                         dbesc(DBM::date($contact["name-date"])), dbesc(DBM::date($contact["uri-date"])),
1655                                         intval($contact["id"]), dbesc($contact["network"])
1656                                 );
1657                         }
1658
1659                         update_contact_avatar(
1660                                 $author["avatar"],
1661                                 $importer["uid"],
1662                                 $contact["id"],
1663                                 (strtotime($contact["avatar-date"]) > strtotime($r[0]["avatar-date"]))
1664                         );
1665
1666                         /*
1667                          * The generation is a sign for the reliability of the provided data.
1668                          * It is used in the socgraph.php to prevent that old contact data
1669                          * that was relayed over several servers can overwrite contact
1670                          * data that we received directly.
1671                          */
1672
1673                         $poco["generation"] = 2;
1674                         $poco["photo"] = $author["avatar"];
1675                         $poco["hide"] = $hide;
1676                         $poco["contact-type"] = $contact["contact-type"];
1677                         $gcid = GlobalContact::update($poco);
1678
1679                         GlobalContact::link($gcid, $importer["uid"], $contact["id"]);
1680                 }
1681
1682                 return($author);
1683         }
1684
1685         /**
1686          * @brief Transforms activity objects into an XML string
1687          *
1688          * @param object $xpath    XPath object
1689          * @param object $activity Activity object
1690          * @param text   $element  element name
1691          *
1692          * @return string XML string
1693          * @todo Find good type-hints for all parameter
1694          */
1695         private static function transform_activity($xpath, $activity, $element)
1696         {
1697                 if (!is_object($activity)) {
1698                         return "";
1699                 }
1700
1701                 $obj_doc = new DOMDocument("1.0", "utf-8");
1702                 $obj_doc->formatOutput = true;
1703
1704                 $obj_element = $obj_doc->createElementNS(NAMESPACE_ATOM1, $element);
1705
1706                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1707                 XML::addElement($obj_doc, $obj_element, "type", $activity_type);
1708
1709                 $id = $xpath->query("atom:id", $activity)->item(0);
1710                 if (is_object($id)) {
1711                         $obj_element->appendChild($obj_doc->importNode($id, true));
1712                 }
1713
1714                 $title = $xpath->query("atom:title", $activity)->item(0);
1715                 if (is_object($title)) {
1716                         $obj_element->appendChild($obj_doc->importNode($title, true));
1717                 }
1718
1719                 $links = $xpath->query("atom:link", $activity);
1720                 if (is_object($links)) {
1721                         foreach ($links as $link) {
1722                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1723                         }
1724                 }
1725
1726                 $content = $xpath->query("atom:content", $activity)->item(0);
1727                 if (is_object($content)) {
1728                         $obj_element->appendChild($obj_doc->importNode($content, true));
1729                 }
1730
1731                 $obj_doc->appendChild($obj_element);
1732
1733                 $objxml = $obj_doc->saveXML($obj_element);
1734
1735                 /// @todo This isn't totally clean. We should find a way to transform the namespaces
1736                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1737                 return($objxml);
1738         }
1739
1740         /**
1741          * @brief Processes the mail elements
1742          *
1743          * @param object $xpath    XPath object
1744          * @param object $mail     mail elements
1745          * @param array  $importer Record of the importer user mixed with contact of the content
1746          * @todo Find good type-hints for all parameter
1747          */
1748         private static function process_mail($xpath, $mail, $importer)
1749         {
1750                 logger("Processing mails");
1751
1752                 /// @TODO Rewrite this to one statement
1753                 $msg = array();
1754                 $msg["uid"] = $importer["importer_uid"];
1755                 $msg["from-name"] = $xpath->query("dfrn:sender/dfrn:name/text()", $mail)->item(0)->nodeValue;
1756                 $msg["from-url"] = $xpath->query("dfrn:sender/dfrn:uri/text()", $mail)->item(0)->nodeValue;
1757                 $msg["from-photo"] = $xpath->query("dfrn:sender/dfrn:avatar/text()", $mail)->item(0)->nodeValue;
1758                 $msg["contact-id"] = $importer["id"];
1759                 $msg["uri"] = $xpath->query("dfrn:id/text()", $mail)->item(0)->nodeValue;
1760                 $msg["parent-uri"] = $xpath->query("dfrn:in-reply-to/text()", $mail)->item(0)->nodeValue;
1761                 $msg["created"] = $xpath->query("dfrn:sentdate/text()", $mail)->item(0)->nodeValue;
1762                 $msg["title"] = $xpath->query("dfrn:subject/text()", $mail)->item(0)->nodeValue;
1763                 $msg["body"] = $xpath->query("dfrn:content/text()", $mail)->item(0)->nodeValue;
1764                 $msg["seen"] = 0;
1765                 $msg["replied"] = 0;
1766
1767                 dba::insert('mail', $msg);
1768
1769                 // send notifications.
1770                 /// @TODO Arange this mess
1771                 $notif_params = array(
1772                         "type" => NOTIFY_MAIL,
1773                         "notify_flags" => $importer["notify-flags"],
1774                         "language" => $importer["language"],
1775                         "to_name" => $importer["username"],
1776                         "to_email" => $importer["email"],
1777                         "uid" => $importer["importer_uid"],
1778                         "item" => $msg,
1779                         "source_name" => $msg["from-name"],
1780                         "source_link" => $importer["url"],
1781                         "source_photo" => $importer["thumb"],
1782                         "verb" => ACTIVITY_POST,
1783                         "otype" => "mail"
1784                 );
1785
1786                 notification($notif_params);
1787
1788                 logger("Mail is processed, notification was sent.");
1789         }
1790
1791         /**
1792          * @brief Processes the suggestion elements
1793          *
1794          * @param object $xpath      XPath object
1795          * @param object $suggestion suggestion elements
1796          * @param array  $importer   Record of the importer user mixed with contact of the content
1797          * @todo Find good type-hints for all parameter
1798          */
1799         private static function process_suggestion($xpath, $suggestion, $importer)
1800         {
1801                 $a = get_app();
1802
1803                 logger("Processing suggestions");
1804
1805                 /// @TODO Rewrite this to one statement
1806                 $suggest = array();
1807                 $suggest["uid"] = $importer["importer_uid"];
1808                 $suggest["cid"] = $importer["id"];
1809                 $suggest["url"] = $xpath->query("dfrn:url/text()", $suggestion)->item(0)->nodeValue;
1810                 $suggest["name"] = $xpath->query("dfrn:name/text()", $suggestion)->item(0)->nodeValue;
1811                 $suggest["photo"] = $xpath->query("dfrn:photo/text()", $suggestion)->item(0)->nodeValue;
1812                 $suggest["request"] = $xpath->query("dfrn:request/text()", $suggestion)->item(0)->nodeValue;
1813                 $suggest["body"] = $xpath->query("dfrn:note/text()", $suggestion)->item(0)->nodeValue;
1814
1815                 // Does our member already have a friend matching this description?
1816
1817                 $r = q(
1818                         "SELECT `id` FROM `contact` WHERE `name` = '%s' AND `nurl` = '%s' AND `uid` = %d LIMIT 1",
1819                         dbesc($suggest["name"]),
1820                         dbesc(normalise_link($suggest["url"])),
1821                         intval($suggest["uid"])
1822                 );
1823
1824                 /*
1825                  * The valid result means the friend we're about to send a friend
1826                  * suggestion already has them in their contact, which means no further
1827                  * action is required.
1828                  *
1829                  * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
1830                  */
1831                 if (DBM::is_result($r)) {
1832                         return false;
1833                 }
1834
1835                 // Do we already have an fcontact record for this person?
1836
1837                 $fid = 0;
1838                 $r = q(
1839                         "SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1840                         dbesc($suggest["url"]),
1841                         dbesc($suggest["name"]),
1842                         dbesc($suggest["request"])
1843                 );
1844                 if (DBM::is_result($r)) {
1845                         $fid = $r[0]["id"];
1846
1847                         // OK, we do. Do we already have an introduction for this person ?
1848                         $r = q(
1849                                 "SELECT `id` FROM `intro` WHERE `uid` = %d AND `fid` = %d LIMIT 1",
1850                                 intval($suggest["uid"]),
1851                                 intval($fid)
1852                         );
1853
1854                         /*
1855                          * The valid result means the friend we're about to send a friend
1856                          * suggestion already has them in their contact, which means no further
1857                          * action is required.
1858                          *
1859                          * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
1860                          */
1861                         if (DBM::is_result($r)) {
1862                                 return false;
1863                         }
1864                 }
1865                 if (!$fid) {
1866                         $r = q(
1867                                 "INSERT INTO `fcontact` (`name`,`url`,`photo`,`request`) VALUES ('%s', '%s', '%s', '%s')",
1868                                 dbesc($suggest["name"]),
1869                                 dbesc($suggest["url"]),
1870                                 dbesc($suggest["photo"]),
1871                                 dbesc($suggest["request"])
1872                         );
1873                 }
1874                 $r = q(
1875                         "SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1876                         dbesc($suggest["url"]),
1877                         dbesc($suggest["name"]),
1878                         dbesc($suggest["request"])
1879                 );
1880
1881                 /*
1882                  * If no record in fcontact is found, below INSERT statement will not
1883                  * link an introduction to it.
1884                  */
1885                 if (!DBM::is_result($r)) {
1886                         // database record did not get created. Quietly give up.
1887                         killme();
1888                 }
1889
1890                 $fid = $r[0]["id"];
1891
1892                 $hash = random_string();
1893
1894                 $r = q(
1895                         "INSERT INTO `intro` (`uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked`)
1896                         VALUES(%d, %d, %d, '%s', '%s', '%s', %d)",
1897                         intval($suggest["uid"]),
1898                         intval($fid),
1899                         intval($suggest["cid"]),
1900                         dbesc($suggest["body"]),
1901                         dbesc($hash),
1902                         dbesc(datetime_convert()),
1903                         intval(0)
1904                 );
1905
1906                 notification(array(
1907                         "type"         => NOTIFY_SUGGEST,
1908                         "notify_flags" => $importer["notify-flags"],
1909                         "language"     => $importer["language"],
1910                         "to_name"      => $importer["username"],
1911                         "to_email"     => $importer["email"],
1912                         "uid"          => $importer["importer_uid"],
1913                         "item"         => $suggest,
1914                         "link"         => System::baseUrl()."/notifications/intros",
1915                         "source_name"  => $importer["name"],
1916                         "source_link"  => $importer["url"],
1917                         "source_photo" => $importer["photo"],
1918                         "verb"         => ACTIVITY_REQ_FRIEND,
1919                         "otype"        => "intro")
1920                 );
1921
1922                 return true;
1923         }
1924
1925         /**
1926          * @brief Processes the relocation elements
1927          *
1928          * @param object $xpath      XPath object
1929          * @param object $relocation relocation elements
1930          * @param array  $importer   Record of the importer user mixed with contact of the content
1931          * @todo Find good type-hints for all parameter
1932          */
1933         private static function process_relocation($xpath, $relocation, $importer)
1934         {
1935                 logger("Processing relocations");
1936
1937                 /// @TODO Rewrite this to one statement
1938                 $relocate = array();
1939                 $relocate["uid"] = $importer["importer_uid"];
1940                 $relocate["cid"] = $importer["id"];
1941                 $relocate["url"] = $xpath->query("dfrn:url/text()", $relocation)->item(0)->nodeValue;
1942                 $relocate["addr"] = $xpath->query("dfrn:addr/text()", $relocation)->item(0)->nodeValue;
1943                 $relocate["name"] = $xpath->query("dfrn:name/text()", $relocation)->item(0)->nodeValue;
1944                 $relocate["avatar"] = $xpath->query("dfrn:avatar/text()", $relocation)->item(0)->nodeValue;
1945                 $relocate["photo"] = $xpath->query("dfrn:photo/text()", $relocation)->item(0)->nodeValue;
1946                 $relocate["thumb"] = $xpath->query("dfrn:thumb/text()", $relocation)->item(0)->nodeValue;
1947                 $relocate["micro"] = $xpath->query("dfrn:micro/text()", $relocation)->item(0)->nodeValue;
1948                 $relocate["request"] = $xpath->query("dfrn:request/text()", $relocation)->item(0)->nodeValue;
1949                 $relocate["confirm"] = $xpath->query("dfrn:confirm/text()", $relocation)->item(0)->nodeValue;
1950                 $relocate["notify"] = $xpath->query("dfrn:notify/text()", $relocation)->item(0)->nodeValue;
1951                 $relocate["poll"] = $xpath->query("dfrn:poll/text()", $relocation)->item(0)->nodeValue;
1952                 $relocate["sitepubkey"] = $xpath->query("dfrn:sitepubkey/text()", $relocation)->item(0)->nodeValue;
1953
1954                 if (($relocate["avatar"] == "") && ($relocate["photo"] != "")) {
1955                         $relocate["avatar"] = $relocate["photo"];
1956                 }
1957
1958                 if ($relocate["addr"] == "") {
1959                         $relocate["addr"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$3@$2", $relocate["url"]);
1960                 }
1961
1962                 // update contact
1963                 $r = q(
1964                         "SELECT `photo`, `url` FROM `contact` WHERE `id` = %d AND `uid` = %d;",
1965                         intval($importer["id"]),
1966                         intval($importer["importer_uid"])
1967                 );
1968
1969                 if (!DBM::is_result($r)) {
1970                         logger("Query failed to execute, no result returned in " . __FUNCTION__);
1971                         return false;
1972                 }
1973
1974                 $old = $r[0];
1975
1976                 // Update the gcontact entry
1977                 $relocate["server_url"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $relocate["url"]);
1978
1979                 $x = q(
1980                         "UPDATE `gcontact` SET
1981                                         `name` = '%s',
1982                                         `photo` = '%s',
1983                                         `url` = '%s',
1984                                         `nurl` = '%s',
1985                                         `addr` = '%s',
1986                                         `connect` = '%s',
1987                                         `notify` = '%s',
1988                                         `server_url` = '%s'
1989                         WHERE `nurl` = '%s';",
1990                         dbesc($relocate["name"]),
1991                         dbesc($relocate["avatar"]),
1992                         dbesc($relocate["url"]),
1993                         dbesc(normalise_link($relocate["url"])),
1994                         dbesc($relocate["addr"]),
1995                         dbesc($relocate["addr"]),
1996                         dbesc($relocate["notify"]),
1997                         dbesc($relocate["server_url"]),
1998                         dbesc(normalise_link($old["url"]))
1999                 );
2000
2001                 // Update the contact table. We try to find every entry.
2002                 $x = q(
2003                         "UPDATE `contact` SET
2004                                         `name` = '%s',
2005                                         `avatar` = '%s',
2006                                         `url` = '%s',
2007                                         `nurl` = '%s',
2008                                         `addr` = '%s',
2009                                         `request` = '%s',
2010                                         `confirm` = '%s',
2011                                         `notify` = '%s',
2012                                         `poll` = '%s',
2013                                         `site-pubkey` = '%s'
2014                         WHERE (`id` = %d AND `uid` = %d) OR (`nurl` = '%s');",
2015                         dbesc($relocate["name"]),
2016                         dbesc($relocate["avatar"]),
2017                         dbesc($relocate["url"]),
2018                         dbesc(normalise_link($relocate["url"])),
2019                         dbesc($relocate["addr"]),
2020                         dbesc($relocate["request"]),
2021                         dbesc($relocate["confirm"]),
2022                         dbesc($relocate["notify"]),
2023                         dbesc($relocate["poll"]),
2024                         dbesc($relocate["sitepubkey"]),
2025                         intval($importer["id"]),
2026                         intval($importer["importer_uid"]),
2027                         dbesc(normalise_link($old["url"]))
2028                 );
2029
2030                 update_contact_avatar($relocate["avatar"], $importer["importer_uid"], $importer["id"], true);
2031
2032                 if ($x === false) {
2033                         return false;
2034                 }
2035
2036                 // update items
2037                 /// @todo This is an extreme performance killer
2038                 $fields = array(
2039                         'owner-link' => array($old["url"], $relocate["url"]),
2040                         'author-link' => array($old["url"], $relocate["url"]),
2041                         //'owner-avatar' => array($old["photo"], $relocate["photo"]),
2042                         //'author-avatar' => array($old["photo"], $relocate["photo"]),
2043                 );
2044                 foreach ($fields as $n => $f) {
2045                         $r = q(
2046                                 "SELECT `id` FROM `item` WHERE `%s` = '%s' AND `uid` = %d LIMIT 1",
2047                                 $n,
2048                                 dbesc($f[0]),
2049                                 intval($importer["importer_uid"])
2050                         );
2051
2052                         if (DBM::is_result($r)) {
2053                                 $x = q(
2054                                         "UPDATE `item` SET `%s` = '%s' WHERE `%s` = '%s' AND `uid` = %d",
2055                                         $n,
2056                                         dbesc($f[1]),
2057                                         $n,
2058                                         dbesc($f[0]),
2059                                         intval($importer["importer_uid"])
2060                                 );
2061
2062                                 if ($x === false) {
2063                                         return false;
2064                                 }
2065                         }
2066                 }
2067
2068                 /// @TODO
2069                 /// merge with current record, current contents have priority
2070                 /// update record, set url-updated
2071                 /// update profile photos
2072                 /// schedule a scan?
2073                 return true;
2074         }
2075
2076         /**
2077          * @brief Updates an item
2078          *
2079          * @param array $current   the current item record
2080          * @param array $item      the new item record
2081          * @param array $importer  Record of the importer user mixed with contact of the content
2082          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
2083          * @todo set proper type-hints (array?)
2084          */
2085         private static function update_content($current, $item, $importer, $entrytype)
2086         {
2087                 $changed = false;
2088
2089                 if (edited_timestamp_is_newer($current, $item)) {
2090                         // do not accept (ignore) an earlier edit than one we currently have.
2091                         if (datetime_convert("UTC", "UTC", $item["edited"]) < $current["edited"]) {
2092                                 return false;
2093                         }
2094
2095                         $fields = array('title' => $item["title"], 'body' => $item["body"],
2096                                         'tag' => $item["tag"], 'changed' => datetime_convert(),
2097                                         'edited' => datetime_convert("UTC", "UTC", $item["edited"]));
2098
2099                         $condition = array("`uri` = ? AND `uid` IN (0, ?)", $item["uri"], $importer["importer_uid"]);
2100                         dba::update('item', $fields, $condition);
2101
2102                         create_tags_from_itemuri($item["uri"], $importer["importer_uid"]);
2103                         update_thread_uri($item["uri"], $importer["importer_uid"]);
2104
2105                         $changed = true;
2106
2107                         if ($entrytype == DFRN_REPLY_RC) {
2108                                 Worker::add(PRIORITY_HIGH, "Notifier", "comment-import", $current["id"]);
2109                         }
2110                 }
2111
2112                 // update last-child if it changes
2113                 if ($item["last-child"] && ($item["last-child"] != $current["last-child"])) {
2114                         $r = q(
2115                                 "UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` IN (0, %d)",
2116                                 dbesc(datetime_convert()),
2117                                 dbesc($item["parent-uri"]),
2118                                 intval($importer["importer_uid"])
2119                         );
2120                         $r = q(
2121                                 "UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` IN (0, %d)",
2122                                 intval($item["last-child"]),
2123                                 dbesc(datetime_convert()),
2124                                 dbesc($item["uri"]),
2125                                 intval($importer["importer_uid"])
2126                         );
2127                 }
2128                 return $changed;
2129         }
2130
2131         /**
2132          * @brief Detects the entry type of the item
2133          *
2134          * @param array $importer Record of the importer user mixed with contact of the content
2135          * @param array $item     the new item record
2136          *
2137          * @return int Is it a toplevel entry, a comment or a relayed comment?
2138          * @todo set proper type-hints (array?)
2139          */
2140         private static function get_entry_type($importer, $item)
2141         {
2142                 if ($item["parent-uri"] != $item["uri"]) {
2143                         $community = false;
2144
2145                         if ($importer["page-flags"] == PAGE_COMMUNITY || $importer["page-flags"] == PAGE_PRVGROUP) {
2146                                 $sql_extra = "";
2147                                 $community = true;
2148                                 logger("possible community action");
2149                         } else {
2150                                 $sql_extra = " AND `contact`.`self` AND `item`.`wall` ";
2151                         }
2152
2153                         // was the top-level post for this action written by somebody on this site?
2154                         // Specifically, the recipient?
2155
2156                         $is_a_remote_action = false;
2157
2158                         $r = q(
2159                                 "SELECT `item`.`parent-uri` FROM `item`
2160                                 WHERE `item`.`uri` = '%s'
2161                                 LIMIT 1",
2162                                 dbesc($item["parent-uri"])
2163                         );
2164                         if (DBM::is_result($r)) {
2165                                 $r = q(
2166                                         "SELECT `item`.`forum_mode`, `item`.`wall` FROM `item`
2167                                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
2168                                         WHERE `item`.`uri` = '%s' AND (`item`.`parent-uri` = '%s' OR `item`.`thr-parent` = '%s')
2169                                         AND `item`.`uid` = %d
2170                                         $sql_extra
2171                                         LIMIT 1",
2172                                         dbesc($r[0]["parent-uri"]),
2173                                         dbesc($r[0]["parent-uri"]),
2174                                         dbesc($r[0]["parent-uri"]),
2175                                         intval($importer["importer_uid"])
2176                                 );
2177                                 if (DBM::is_result($r)) {
2178                                         $is_a_remote_action = true;
2179                                 }
2180                         }
2181
2182                         /*
2183                          * Does this have the characteristics of a community or private group action?
2184                          * If it's an action to a wall post on a community/prvgroup page it's a
2185                          * valid community action. Also forum_mode makes it valid for sure.
2186                          * If neither, it's not.
2187                          */
2188
2189                         /// @TODO Maybe merge these if() blocks into one?
2190                         if ($is_a_remote_action && $community && (!$r[0]["forum_mode"]) && (!$r[0]["wall"])) {
2191                                 $is_a_remote_action = false;
2192                                 logger("not a community action");
2193                         }
2194
2195                         if ($is_a_remote_action) {
2196                                 return DFRN_REPLY_RC;
2197                         } else {
2198                                 return DFRN_REPLY;
2199                         }
2200                 } else {
2201                         return DFRN_TOP_LEVEL;
2202                 }
2203         }
2204
2205         /**
2206          * @brief Send a "poke"
2207          *
2208          * @param array $item      the new item record
2209          * @param array $importer  Record of the importer user mixed with contact of the content
2210          * @param int   $posted_id The record number of item record that was just posted
2211          * @todo set proper type-hints (array?)
2212          */
2213         private static function do_poke($item, $importer, $posted_id)
2214         {
2215                 $verb = urldecode(substr($item["verb"], strpos($item["verb"], "#")+1));
2216                 if (!$verb) {
2217                         return;
2218                 }
2219                 $xo = parse_xml_string($item["object"], false);
2220
2221                 if (($xo->type == ACTIVITY_OBJ_PERSON) && ($xo->id)) {
2222                         // somebody was poked/prodded. Was it me?
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 && link_compare($Blink, System::baseUrl() . "/profile/" . $importer["nickname"])) {
2235                                 // send a notification
2236                                 notification(
2237                                         array(
2238                                         "type"         => NOTIFY_POKE,
2239                                         "notify_flags" => $importer["notify-flags"],
2240                                         "language"     => $importer["language"],
2241                                         "to_name"      => $importer["username"],
2242                                         "to_email"     => $importer["email"],
2243                                         "uid"          => $importer["importer_uid"],
2244                                         "item"         => $item,
2245                                         "link"         => System::baseUrl()."/display/".urlencode(get_item_guid($posted_id)),
2246                                         "source_name"  => stripslashes($item["author-name"]),
2247                                         "source_link"  => $item["author-link"],
2248                                         "source_photo" => ((link_compare($item["author-link"],$importer["url"]))
2249                                                 ? $importer["thumb"] : $item["author-avatar"]),
2250                                         "verb"         => $item["verb"],
2251                                         "otype"        => "person",
2252                                         "activity"     => $verb,
2253                                         "parent"       => $item["parent"])
2254                                 );
2255                         }
2256                 }
2257         }
2258
2259         /**
2260          * @brief Processes several actions, depending on the verb
2261          *
2262          * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
2263          * @param array $importer  Record of the importer user mixed with contact of the content
2264          * @param array $item      the new item record
2265          * @param bool  $is_like   Is the verb a "like"?
2266          *
2267          * @return bool Should the processing of the entries be continued?
2268          * @todo set proper type-hints (array?)
2269          */
2270         private static function process_verbs($entrytype, $importer, &$item, &$is_like)
2271         {
2272                 logger("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, LOGGER_DEBUG);
2273
2274                 if (($entrytype == DFRN_TOP_LEVEL)) {
2275                         // The filling of the the "contact" variable is done for legcy reasons
2276                         // The functions below are partly used by ostatus.php as well - where we have this variable
2277                         $r = q("SELECT * FROM `contact` WHERE `id` = %d", intval($importer["id"]));
2278                         $contact = $r[0];
2279                         $nickname = $contact["nick"];
2280
2281                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
2282                         // This function once was responsible for DFRN and OStatus.
2283                         if (activity_match($item["verb"], ACTIVITY_FOLLOW)) {
2284                                 logger("New follower");
2285                                 new_follower($importer, $contact, $item, $nickname);
2286                                 return false;
2287                         }
2288                         if (activity_match($item["verb"], ACTIVITY_UNFOLLOW)) {
2289                                 logger("Lost follower");
2290                                 lose_follower($importer, $contact, $item);
2291                                 return false;
2292                         }
2293                         if (activity_match($item["verb"], ACTIVITY_REQ_FRIEND)) {
2294                                 logger("New friend request");
2295                                 new_follower($importer, $contact, $item, $nickname, true);
2296                                 return false;
2297                         }
2298                         if (activity_match($item["verb"], ACTIVITY_UNFRIEND)) {
2299                                 logger("Lost sharer");
2300                                 lose_sharer($importer, $contact, $item);
2301                                 return false;
2302                         }
2303                 } else {
2304                         if (($item["verb"] == ACTIVITY_LIKE)
2305                                 || ($item["verb"] == ACTIVITY_DISLIKE)
2306                                 || ($item["verb"] == ACTIVITY_ATTEND)
2307                                 || ($item["verb"] == ACTIVITY_ATTENDNO)
2308                                 || ($item["verb"] == ACTIVITY_ATTENDMAYBE)
2309                         ) {
2310                                 $is_like = true;
2311                                 $item["type"] = "activity";
2312                                 $item["gravity"] = GRAVITY_LIKE;
2313                                 // only one like or dislike per person
2314                                 // splitted into two queries for performance issues
2315                                 $r = q(
2316                                         "SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `parent-uri` = '%s' AND NOT `deleted` LIMIT 1",
2317                                         intval($item["uid"]),
2318                                         dbesc($item["author-link"]),
2319                                         dbesc($item["verb"]),
2320                                         dbesc($item["parent-uri"])
2321                                 );
2322                                 if (DBM::is_result($r)) {
2323                                         return false;
2324                                 }
2325
2326                                 $r = q(
2327                                         "SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `thr-parent` = '%s' AND NOT `deleted` LIMIT 1",
2328                                         intval($item["uid"]),
2329                                         dbesc($item["author-link"]),
2330                                         dbesc($item["verb"]),
2331                                         dbesc($item["parent-uri"])
2332                                 );
2333                                 if (DBM::is_result($r)) {
2334                                         return false;
2335                                 }
2336                         } else {
2337                                 $is_like = false;
2338                         }
2339
2340                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2341
2342                                 $xo = parse_xml_string($item["object"], false);
2343                                 $xt = parse_xml_string($item["target"], false);
2344
2345                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2346                                         $r = q(
2347                                                 "SELECT `id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2348                                                 dbesc($xt->id),
2349                                                 intval($importer["importer_uid"])
2350                                         );
2351
2352                                         if (!DBM::is_result($r)) {
2353                                                 logger("Query failed to execute, no result returned in " . __FUNCTION__);
2354                                                 return false;
2355                                         }
2356
2357                                         // extract tag, if not duplicate, add to parent item
2358                                         if ($xo->content) {
2359                                                 if (!(stristr($r[0]["tag"],trim($xo->content)))) {
2360                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2361                                                                 dbesc($r[0]["tag"] . (strlen($r[0]["tag"]) ? ',' : '') . '#[url=' . $xo->id . ']'. $xo->content . '[/url]'),
2362                                                                 intval($r[0]["id"])
2363                                                         );
2364                                                         create_tags_from_item($r[0]["id"]);
2365                                                 }
2366                                         }
2367                                 }
2368                         }
2369                 }
2370                 return true;
2371         }
2372
2373         /**
2374          * @brief Processes the link elements
2375          *
2376          * @param object $links link elements
2377          * @param array  $item  the item record
2378          * @todo set proper type-hints
2379          */
2380         private static function parse_links($links, &$item)
2381         {
2382                 $rel = "";
2383                 $href = "";
2384                 $type = "";
2385                 $length = "0";
2386                 $title = "";
2387                 foreach ($links AS $link) {
2388                         foreach ($link->attributes AS $attributes) {
2389                                 /// @TODO Rewrite these repeated (same) if () statements to a switch()
2390                                 if ($attributes->name == "href") {
2391                                         $href = $attributes->textContent;
2392                                 }
2393                                 if ($attributes->name == "rel") {
2394                                         $rel = $attributes->textContent;
2395                                 }
2396                                 if ($attributes->name == "type") {
2397                                         $type = $attributes->textContent;
2398                                 }
2399                                 if ($attributes->name == "length") {
2400                                         $length = $attributes->textContent;
2401                                 }
2402                                 if ($attributes->name == "title") {
2403                                         $title = $attributes->textContent;
2404                                 }
2405                         }
2406                         if (($rel != "") && ($href != "")) {
2407                                 switch ($rel) {
2408                                         case "alternate":
2409                                                 $item["plink"] = $href;
2410                                                 break;
2411                                         case "enclosure":
2412                                                 $enclosure = $href;
2413                                                 if (strlen($item["attach"])) {
2414                                                         $item["attach"] .= ",";
2415                                                 }
2416
2417                                                 $item["attach"] .= '[attach]href="' . $href . '" length="' . $length . '" type="' . $type . '" title="' . $title . '"[/attach]';
2418                                                 break;
2419                                 }
2420                         }
2421                 }
2422         }
2423
2424         /**
2425          * @brief Processes the entry elements which contain the items and comments
2426          *
2427          * @param array $header Array of the header elements that always stay the same
2428          * @param object $xpath XPath object
2429          * @param object $entry entry elements
2430          * @param array $importer Record of the importer user mixed with contact of the content
2431          * @todo Add type-hints
2432          */
2433         private static function process_entry($header, $xpath, $entry, $importer, $xml)
2434         {
2435                 logger("Processing entries");
2436
2437                 $item = $header;
2438
2439                 $item["protocol"] = PROTOCOL_DFRN;
2440
2441                 $item["source"] = $xml;
2442
2443                 // Get the uri
2444                 $item["uri"] = $xpath->query("atom:id/text()", $entry)->item(0)->nodeValue;
2445
2446                 $item["edited"] = $xpath->query("atom:updated/text()", $entry)->item(0)->nodeValue;
2447
2448                 $current = q(
2449                         "SELECT `id`, `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2450                         dbesc($item["uri"]),
2451                         intval($importer["importer_uid"])
2452                 );
2453
2454                 // Is there an existing item?
2455                 if (DBM::is_result($current) && edited_timestamp_is_newer($current[0], $item)
2456                         && (datetime_convert("UTC", "UTC", $item["edited"]) < $current[0]["edited"])
2457                 ) {
2458                         logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2459                         return;
2460                 }
2461
2462                 // Fetch the owner
2463                 $owner = self::fetchauthor($xpath, $entry, $importer, "dfrn:owner", true);
2464
2465                 $item["owner-name"] = $owner["name"];
2466                 $item["owner-link"] = $owner["link"];
2467                 $item["owner-avatar"] = $owner["avatar"];
2468
2469                 // fetch the author
2470                 $author = self::fetchauthor($xpath, $entry, $importer, "atom:author", true);
2471
2472                 $item["author-name"] = $author["name"];
2473                 $item["author-link"] = $author["link"];
2474                 $item["author-avatar"] = $author["avatar"];
2475
2476                 $item["title"] = $xpath->query("atom:title/text()", $entry)->item(0)->nodeValue;
2477
2478                 $item["created"] = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2479
2480                 $item["body"] = $xpath->query("dfrn:env/text()", $entry)->item(0)->nodeValue;
2481                 $item["body"] = str_replace(array(' ',"\t","\r","\n"), array('','','',''), $item["body"]);
2482                 // make sure nobody is trying to sneak some html tags by us
2483                 $item["body"] = notags(base64url_decode($item["body"]));
2484
2485                 $item["body"] = limit_body_size($item["body"]);
2486
2487                 /// @todo Do we really need this check for HTML elements? (It was copied from the old function)
2488                 if ((strpos($item['body'], '<') !== false) && (strpos($item['body'], '>') !== false)) {
2489                         $item['body'] = reltoabs($item['body'], $base_url);
2490
2491                         $item['body'] = html2bb_video($item['body']);
2492
2493                         $item['body'] = oembed_html2bbcode($item['body']);
2494
2495                         $config = HTMLPurifier_Config::createDefault();
2496                         $config->set('Cache.DefinitionImpl', null);
2497
2498                         // we shouldn't need a whitelist, because the bbcode converter
2499                         // will strip out any unsupported tags.
2500
2501                         $purifier = new HTMLPurifier($config);
2502                         $item['body'] = $purifier->purify($item['body']);
2503
2504                         $item['body'] = @html2bbcode($item['body']);
2505                 }
2506
2507                 /// @todo We should check for a repeated post and if we know the repeated author.
2508
2509                 // We don't need the content element since "dfrn:env" is always present
2510                 //$item["body"] = $xpath->query("atom:content/text()", $entry)->item(0)->nodeValue;
2511
2512                 $item["last-child"] = $xpath->query("dfrn:comment-allow/text()", $entry)->item(0)->nodeValue;
2513                 $item["location"] = $xpath->query("dfrn:location/text()", $entry)->item(0)->nodeValue;
2514
2515                 $georsspoint = $xpath->query("georss:point", $entry);
2516                 if ($georsspoint) {
2517                         $item["coord"] = $georsspoint->item(0)->nodeValue;
2518                 }
2519
2520                 $item["private"] = $xpath->query("dfrn:private/text()", $entry)->item(0)->nodeValue;
2521
2522                 $item["extid"] = $xpath->query("dfrn:extid/text()", $entry)->item(0)->nodeValue;
2523
2524                 if ($xpath->query("dfrn:bookmark/text()", $entry)->item(0)->nodeValue == "true") {
2525                         $item["bookmark"] = true;
2526                 }
2527
2528                 $notice_info = $xpath->query("statusnet:notice_info", $entry);
2529                 if ($notice_info && ($notice_info->length > 0)) {
2530                         foreach ($notice_info->item(0)->attributes AS $attributes) {
2531                                 if ($attributes->name == "source") {
2532                                         $item["app"] = strip_tags($attributes->textContent);
2533                                 }
2534                         }
2535                 }
2536
2537                 $item["guid"] = $xpath->query("dfrn:diaspora_guid/text()", $entry)->item(0)->nodeValue;
2538
2539                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "item_store"
2540                 $dsprsig = unxmlify($xpath->query("dfrn:diaspora_signature/text()", $entry)->item(0)->nodeValue);
2541                 if ($dsprsig != "") {
2542                         $item["dsprsig"] = $dsprsig;
2543                 }
2544
2545                 $item["verb"] = $xpath->query("activity:verb/text()", $entry)->item(0)->nodeValue;
2546
2547                 if ($xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue != "") {
2548                         $item["object-type"] = $xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue;
2549                 }
2550
2551                 $object = $xpath->query("activity:object", $entry)->item(0);
2552                 $item["object"] = self::transform_activity($xpath, $object, "object");
2553
2554                 if (trim($item["object"]) != "") {
2555                         $r = parse_xml_string($item["object"], false);
2556                         if (isset($r->type)) {
2557                                 $item["object-type"] = $r->type;
2558                         }
2559                 }
2560
2561                 $target = $xpath->query("activity:target", $entry)->item(0);
2562                 $item["target"] = self::transform_activity($xpath, $target, "target");
2563
2564                 $categories = $xpath->query("atom:category", $entry);
2565                 if ($categories) {
2566                         foreach ($categories AS $category) {
2567                                 $term = "";
2568                                 $scheme = "";
2569                                 foreach ($category->attributes AS $attributes) {
2570                                         if ($attributes->name == "term") {
2571                                                 $term = $attributes->textContent;
2572                                         }
2573
2574                                         if ($attributes->name == "scheme") {
2575                                                 $scheme = $attributes->textContent;
2576                                         }
2577                                 }
2578
2579                                 if (($term != "") && ($scheme != "")) {
2580                                         $parts = explode(":", $scheme);
2581                                         if ((count($parts) >= 4) && (array_shift($parts) == "X-DFRN")) {
2582                                                 $termhash = array_shift($parts);
2583                                                 $termurl = implode(":", $parts);
2584
2585                                                 if (strlen($item["tag"])) {
2586                                                         $item["tag"] .= ",";
2587                                                 }
2588
2589                                                 $item["tag"] .= $termhash . "[url=" . $termurl . "]" . $term . "[/url]";
2590                                         }
2591                                 }
2592                         }
2593                 }
2594
2595                 $enclosure = "";
2596
2597                 $links = $xpath->query("atom:link", $entry);
2598                 if ($links) {
2599                         self::parse_links($links, $item);
2600                 }
2601
2602                 $item['conversation-uri'] = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
2603
2604                 $conv = $xpath->query('ostatus:conversation', $entry);
2605                 if (is_object($conv->item(0))) {
2606                         foreach ($conv->item(0)->attributes AS $attributes) {
2607                                 if ($attributes->name == "ref") {
2608                                         $item['conversation-uri'] = $attributes->textContent;
2609                                 }
2610                                 if ($attributes->name == "href") {
2611                                         $item['conversation-href'] = $attributes->textContent;
2612                                 }
2613                         }
2614                 }
2615
2616                 // Is it a reply or a top level posting?
2617                 $item["parent-uri"] = $item["uri"];
2618
2619                 $inreplyto = $xpath->query("thr:in-reply-to", $entry);
2620                 if (is_object($inreplyto->item(0))) {
2621                         foreach ($inreplyto->item(0)->attributes AS $attributes) {
2622                                 if ($attributes->name == "ref") {
2623                                         $item["parent-uri"] = $attributes->textContent;
2624                                 }
2625                         }
2626                 }
2627
2628                 // Get the type of the item (Top level post, reply or remote reply)
2629                 $entrytype = self::get_entry_type($importer, $item);
2630
2631                 // Now assign the rest of the values that depend on the type of the message
2632                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2633                         if (!isset($item["object-type"])) {
2634                                 $item["object-type"] = ACTIVITY_OBJ_COMMENT;
2635                         }
2636
2637                         if ($item["contact-id"] != $owner["contact-id"]) {
2638                                 $item["contact-id"] = $owner["contact-id"];
2639                         }
2640
2641                         if (($item["network"] != $owner["network"]) && ($owner["network"] != "")) {
2642                                 $item["network"] = $owner["network"];
2643                         }
2644
2645                         if ($item["contact-id"] != $author["contact-id"]) {
2646                                 $item["contact-id"] = $author["contact-id"];
2647                         }
2648
2649                         if (($item["network"] != $author["network"]) && ($author["network"] != "")) {
2650                                 $item["network"] = $author["network"];
2651                         }
2652
2653                         /// @TODO maybe remove this old-lost code then?
2654                         // This code was taken from the old DFRN code
2655                         // When activated, forums don't work.
2656                         // And: Why should we disallow commenting by followers?
2657                         // the behaviour is now similar to the Diaspora part.
2658                         //if ($importer["rel"] == CONTACT_IS_FOLLOWER) {
2659                         //      logger("Contact ".$importer["id"]." is only follower. Quitting", LOGGER_DEBUG);
2660                         //      return;
2661                         //}
2662                 }
2663
2664                 if ($entrytype == DFRN_REPLY_RC) {
2665                         $item["type"] = "remote-comment";
2666                         $item["wall"] = 1;
2667                 } elseif ($entrytype == DFRN_TOP_LEVEL) {
2668                         if (!isset($item["object-type"])) {
2669                                 $item["object-type"] = ACTIVITY_OBJ_NOTE;
2670                         }
2671
2672                         // Is it an event?
2673                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2674                                 logger("Item ".$item["uri"]." seems to contain an event.", LOGGER_DEBUG);
2675                                 $ev = bbtoevent($item["body"]);
2676                                 if ((x($ev, "desc") || x($ev, "summary")) && x($ev, "start")) {
2677                                         logger("Event in item ".$item["uri"]." was found.", LOGGER_DEBUG);
2678                                         /// @TODO Mixure of "/' ahead ...
2679                                         $ev["cid"] = $importer["id"];
2680                                         $ev["uid"] = $importer["uid"];
2681                                         $ev["uri"] = $item["uri"];
2682                                         $ev["edited"] = $item["edited"];
2683                                         $ev['private'] = $item['private'];
2684                                         $ev["guid"] = $item["guid"];
2685
2686                                         $r = q(
2687                                                 "SELECT `id` FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2688                                                 dbesc($item["uri"]),
2689                                                 intval($importer["uid"])
2690                                         );
2691                                         if (DBM::is_result($r)) {
2692                                                 $ev["id"] = $r[0]["id"];
2693                                         }
2694
2695                                         $event_id = event_store($ev);
2696                                         logger("Event ".$event_id." was stored", LOGGER_DEBUG);
2697                                         return;
2698                                 }
2699                         }
2700                 }
2701
2702                 if (!self::process_verbs($entrytype, $importer, $item, $is_like)) {
2703                         logger("Exiting because 'process_verbs' told us so", LOGGER_DEBUG);
2704                         return;
2705                 }
2706
2707                 // Update content if 'updated' changes
2708                 if (DBM::is_result($current)) {
2709                         if (self::update_content($r[0], $item, $importer, $entrytype)) {
2710                                 logger("Item ".$item["uri"]." was updated.", LOGGER_DEBUG);
2711                         } else {
2712                                 logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2713                         }
2714                         return;
2715                 }
2716
2717                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2718                         $posted_id = item_store($item);
2719                         $parent = 0;
2720
2721                         if ($posted_id) {
2722                                 logger("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, LOGGER_DEBUG);
2723
2724                                 $item["id"] = $posted_id;
2725
2726                                 $r = q(
2727                                         "SELECT `parent`, `parent-uri` FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
2728                                         intval($posted_id),
2729                                         intval($importer["importer_uid"])
2730                                 );
2731                                 if (DBM::is_result($r)) {
2732                                         $parent = $r[0]["parent"];
2733                                         $parent_uri = $r[0]["parent-uri"];
2734                                 }
2735
2736                                 if (!$is_like) {
2737                                         $r1 = q(
2738                                                 "UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `uid` = %d AND `parent` = %d",
2739                                                 dbesc(datetime_convert()),
2740                                                 intval($importer["importer_uid"]),
2741                                                 intval($r[0]["parent"])
2742                                         );
2743
2744                                         $r2 = q(
2745                                                 "UPDATE `item` SET `last-child` = 1, `changed` = '%s' WHERE `uid` = %d AND `id` = %d",
2746                                                 dbesc(datetime_convert()),
2747                                                 intval($importer["importer_uid"]),
2748                                                 intval($posted_id)
2749                                         );
2750                                 }
2751
2752                                 if ($posted_id && $parent && ($entrytype == DFRN_REPLY_RC)) {
2753                                         logger("Notifying followers about comment ".$posted_id, LOGGER_DEBUG);
2754                                         Worker::add(PRIORITY_HIGH, "Notifier", "comment-import", $posted_id);
2755                                 }
2756
2757                                 return true;
2758                         }
2759                 } else { // $entrytype == DFRN_TOP_LEVEL
2760                         if (!link_compare($item["owner-link"], $importer["url"])) {
2761                                 /*
2762                                  * The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery,
2763                                  * but otherwise there's a possible data mixup on the sender's system.
2764                                  * the tgroup delivery code called from item_store will correct it if it's a forum,
2765                                  * but we're going to unconditionally correct it here so that the post will always be owned by our contact.
2766                                  */
2767                                 logger('Correcting item owner.', LOGGER_DEBUG);
2768                                 $item["owner-name"]   = $importer["senderName"];
2769                                 $item["owner-link"]   = $importer["url"];
2770                                 $item["owner-avatar"] = $importer["thumb"];
2771                         }
2772
2773                         if (($importer["rel"] == CONTACT_IS_FOLLOWER) && (!tgroup_check($importer["importer_uid"], $item))) {
2774                                 logger("Contact ".$importer["id"]." is only follower and tgroup check was negative.", LOGGER_DEBUG);
2775                                 return;
2776                         }
2777
2778                         // This is my contact on another system, but it's really me.
2779                         // Turn this into a wall post.
2780                         $notify = item_is_remote_self($importer, $item);
2781
2782                         $posted_id = item_store($item, false, $notify);
2783
2784                         logger("Item was stored with id ".$posted_id, LOGGER_DEBUG);
2785
2786                         if (stristr($item["verb"],ACTIVITY_POKE))
2787                                 self::do_poke($item, $importer, $posted_id);
2788                 }
2789         }
2790
2791         /**
2792          * @brief Deletes items
2793          *
2794          * @param object $xpath    XPath object
2795          * @param object $deletion deletion elements
2796          * @param array  $importer Record of the importer user mixed with contact of the content
2797          * @todo set proper type-hints
2798          */
2799         private static function process_deletion($xpath, $deletion, $importer)
2800         {
2801                 logger("Processing deletions");
2802
2803                 foreach ($deletion->attributes AS $attributes) {
2804                         if ($attributes->name == "ref") {
2805                                 $uri = $attributes->textContent;
2806                         }
2807                         if ($attributes->name == "when") {
2808                                 $when = $attributes->textContent;
2809                         }
2810                 }
2811                 if ($when) {
2812                         $when = datetime_convert("UTC", "UTC", $when, "Y-m-d H:i:s");
2813                 } else {
2814                         $when = datetime_convert("UTC", "UTC", "now", "Y-m-d H:i:s");
2815                 }
2816
2817                 if (!$uri || !$importer["id"]) {
2818                         return false;
2819                 }
2820
2821                 /// @todo Only select the used fields
2822                 $r = q(
2823                         "SELECT `item`.*, `contact`.`self` FROM `item` INNER JOIN `contact` on `item`.`contact-id` = `contact`.`id`
2824                         WHERE `uri` = '%s' AND `item`.`uid` = %d AND `contact-id` = %d AND NOT `item`.`file` LIKE '%%[%%' LIMIT 1",
2825                         dbesc($uri),
2826                         intval($importer["uid"]),
2827                         intval($importer["id"])
2828                 );
2829                 if (!DBM::is_result($r)) {
2830                         logger("Item with uri " . $uri . " from contact " . $importer["id"] . " for user " . $importer["uid"] . " wasn't found.", LOGGER_DEBUG);
2831                         return;
2832                 } else {
2833                         $item = $r[0];
2834
2835                         $entrytype = self::get_entry_type($importer, $item);
2836
2837                         if (!$item["deleted"]) {
2838                                 logger('deleting item '.$item["id"].' uri='.$uri, LOGGER_DEBUG);
2839                         } else {
2840                                 return;
2841                         }
2842
2843                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2844                                 logger("Deleting event ".$item["event-id"], LOGGER_DEBUG);
2845                                 event_delete($item["event-id"]);
2846                         }
2847
2848                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2849
2850                                 $xo = parse_xml_string($item["object"], false);
2851                                 $xt = parse_xml_string($item["target"], false);
2852
2853                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2854                                         $i = q(
2855                                                 "SELECT `id`, `contact-id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2856                                                 dbesc($xt->id),
2857                                                 intval($importer["importer_uid"])
2858                                         );
2859                                         if (DBM::is_result($i)) {
2860                                                 // For tags, the owner cannot remove the tag on the author's copy of the post.
2861
2862                                                 $owner_remove = (($item["contact-id"] == $i[0]["contact-id"]) ? true: false);
2863                                                 $author_remove = (($item["origin"] && $item["self"]) ? true : false);
2864                                                 $author_copy = (($item["origin"]) ? true : false);
2865
2866                                                 if ($owner_remove && $author_copy) {
2867                                                         return;
2868                                                 }
2869                                                 if ($author_remove || $owner_remove) {
2870                                                         $tags = explode(',', $i[0]["tag"]);
2871                                                         $newtags = array();
2872                                                         if (count($tags)) {
2873                                                                 foreach ($tags as $tag) {
2874                                                                         if (trim($tag) !== trim($xo->body)) {
2875                                                                                 $newtags[] = trim($tag);
2876                                                                         }
2877                                                                 }
2878                                                         }
2879                                                         q(
2880                                                                 "UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2881                                                                 dbesc(implode(',', $newtags)),
2882                                                                 intval($i[0]["id"])
2883                                                         );
2884                                                         create_tags_from_item($i[0]["id"]);
2885                                                 }
2886                                         }
2887                                 }
2888                         }
2889
2890                         if ($entrytype == DFRN_TOP_LEVEL) {
2891                                 $r = q(
2892                                         "UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2893                                                 `body` = '', `title` = ''
2894                                         WHERE `parent-uri` = '%s' AND `uid` IN (0, %d)",
2895                                         dbesc($when),
2896                                         dbesc(datetime_convert()),
2897                                         dbesc($uri),
2898                                         intval($importer["uid"])
2899                                 );
2900                                 create_tags_from_itemuri($uri, $importer["uid"]);
2901                                 create_files_from_itemuri($uri, $importer["uid"]);
2902                                 update_thread_uri($uri, $importer["uid"]);
2903                         } else {
2904                                 $r = q(
2905                                         "UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2906                                                 `body` = '', `title` = ''
2907                                         WHERE `uri` = '%s' AND `uid` IN (0, %d)",
2908                                         dbesc($when),
2909                                         dbesc(datetime_convert()),
2910                                         dbesc($uri),
2911                                         intval($importer["uid"])
2912                                 );
2913                                 create_tags_from_itemuri($uri, $importer["uid"]);
2914                                 create_files_from_itemuri($uri, $importer["uid"]);
2915                                 update_thread_uri($uri, $importer["importer_uid"]);
2916                                 if ($item["last-child"]) {
2917                                         // ensure that last-child is set in case the comment that had it just got wiped.
2918                                         q(
2919                                                 "UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` IN (0, %d)",
2920                                                 dbesc(datetime_convert()),
2921                                                 dbesc($item["parent-uri"]),
2922                                                 intval($item["uid"])
2923                                         );
2924                                         // who is the last child now?
2925                                         $r = q(
2926                                                 "SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `moderated` = 0 AND `uid` = %d
2927                                                 ORDER BY `created` DESC LIMIT 1",
2928                                                 dbesc($item["parent-uri"]),
2929                                                 intval($importer["uid"])
2930                                         );
2931                                         if (DBM::is_result($r)) {
2932                                                 q(
2933                                                         "UPDATE `item` SET `last-child` = 1 WHERE `id` = %d",
2934                                                         intval($r[0]["id"])
2935                                                 );
2936                                         }
2937                                 }
2938                                 // if this is a relayed delete, propagate it to other recipients
2939
2940                                 if ($entrytype == DFRN_REPLY_RC) {
2941                                         logger("Notifying followers about deletion of post " . $item["id"], LOGGER_DEBUG);
2942                                         Worker::add(PRIORITY_HIGH, "Notifier", "drop", $item["id"]);
2943                                 }
2944                         }
2945                 }
2946         }
2947
2948         /**
2949          * @brief Imports a DFRN message
2950          *
2951          * @param text  $xml          The DFRN message
2952          * @param array $importer     Record of the importer user mixed with contact of the content
2953          * @param bool  $sort_by_date Is used when feeds are polled
2954          * @return integer Import status
2955          * @todo set proper type-hints
2956          */
2957         public static function import($xml, $importer, $sort_by_date = false)
2958         {
2959                 if ($xml == "") {
2960                         return 400;
2961                 }
2962
2963                 $doc = new DOMDocument();
2964                 @$doc->loadXML($xml);
2965
2966                 $xpath = new DomXPath($doc);
2967                 $xpath->registerNamespace("atom", NAMESPACE_ATOM1);
2968                 $xpath->registerNamespace("thr", NAMESPACE_THREAD);
2969                 $xpath->registerNamespace("at", NAMESPACE_TOMB);
2970                 $xpath->registerNamespace("media", NAMESPACE_MEDIA);
2971                 $xpath->registerNamespace("dfrn", NAMESPACE_DFRN);
2972                 $xpath->registerNamespace("activity", NAMESPACE_ACTIVITY);
2973                 $xpath->registerNamespace("georss", NAMESPACE_GEORSS);
2974                 $xpath->registerNamespace("poco", NAMESPACE_POCO);
2975                 $xpath->registerNamespace("ostatus", NAMESPACE_OSTATUS);
2976                 $xpath->registerNamespace("statusnet", NAMESPACE_STATUSNET);
2977
2978                 $header = array();
2979                 $header["uid"] = $importer["uid"];
2980                 $header["network"] = NETWORK_DFRN;
2981                 $header["type"] = "remote";
2982                 $header["wall"] = 0;
2983                 $header["origin"] = 0;
2984                 $header["contact-id"] = $importer["id"];
2985
2986                 // Update the contact table if the data has changed
2987
2988                 // The "atom:author" is only present in feeds
2989                 if ($xpath->query("/atom:feed/atom:author")->length > 0) {
2990                         self::fetchauthor($xpath, $doc->firstChild, $importer, "atom:author", false, $xml);
2991                 }
2992
2993                 // Only the "dfrn:owner" in the head section contains all data
2994                 if ($xpath->query("/atom:feed/dfrn:owner")->length > 0) {
2995                         self::fetchauthor($xpath, $doc->firstChild, $importer, "dfrn:owner", false, $xml);
2996                 }
2997
2998                 logger("Import DFRN message for user " . $importer["uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
2999
3000                 // The account type is new since 3.5.1
3001                 if ($xpath->query("/atom:feed/dfrn:account_type")->length > 0) {
3002                         $accounttype = intval($xpath->evaluate("/atom:feed/dfrn:account_type/text()", $context)->item(0)->nodeValue);
3003
3004                         if ($accounttype != $importer["contact-type"]) {
3005                                 dba::update('contact', array('contact-type' => $accounttype), array('id' => $importer["id"]));
3006                         }
3007                 }
3008
3009                 // is it a public forum? Private forums aren't supported with this method
3010                 // This is deprecated since 3.5.1
3011                 $forum = intval($xpath->evaluate("/atom:feed/dfrn:community/text()", $context)->item(0)->nodeValue);
3012
3013                 if ($forum != $importer["forum"]) {
3014                         $condition = array('`forum` != ? AND `id` = ?', $forum, $importer["id"]);
3015                         dba::update('contact', array('forum' => $forum), $condition);
3016                 }
3017
3018                 // We are processing relocations even if we are ignoring a contact
3019                 $relocations = $xpath->query("/atom:feed/dfrn:relocate");
3020                 foreach ($relocations AS $relocation) {
3021                         self::process_relocation($xpath, $relocation, $importer);
3022                 }
3023
3024                 if ($importer["readonly"]) {
3025                         // We aren't receiving stuff from this person. But we will quietly ignore them
3026                         // rather than a blatant "go away" message.
3027                         logger('ignoring contact '.$importer["id"]);
3028                         return 403;
3029                 }
3030
3031                 $mails = $xpath->query("/atom:feed/dfrn:mail");
3032                 foreach ($mails AS $mail) {
3033                         self::process_mail($xpath, $mail, $importer);
3034                 }
3035
3036                 $suggestions = $xpath->query("/atom:feed/dfrn:suggest");
3037                 foreach ($suggestions AS $suggestion) {
3038                         self::process_suggestion($xpath, $suggestion, $importer);
3039                 }
3040
3041                 $deletions = $xpath->query("/atom:feed/at:deleted-entry");
3042                 foreach ($deletions AS $deletion) {
3043                         self::process_deletion($xpath, $deletion, $importer);
3044                 }
3045
3046                 if (!$sort_by_date) {
3047                         $entries = $xpath->query("/atom:feed/atom:entry");
3048                         foreach ($entries AS $entry) {
3049                                 self::process_entry($header, $xpath, $entry, $importer, $xml);
3050                         }
3051                 } else {
3052                         $newentries = array();
3053                         $entries = $xpath->query("/atom:feed/atom:entry");
3054                         foreach ($entries AS $entry) {
3055                                 $created = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
3056                                 $newentries[strtotime($created)] = $entry;
3057                         }
3058
3059                         // Now sort after the publishing date
3060                         ksort($newentries);
3061
3062                         foreach ($newentries AS $entry) {
3063                                 self::process_entry($header, $xpath, $entry, $importer, $xml);
3064                         }
3065                 }
3066                 logger("Import done for user " . $importer["uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
3067                 return 200;
3068         }
3069 }