include/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
  10 use Friendica\App;
  11 use Friendica\Core\System;
  12
  13 require_once("include/Contact.php");
  14 require_once("include/ostatus.php");
  15 require_once("include/enotify.php");
  16 require_once("include/threads.php");
  17 require_once("include/socgraph.php");
  18 require_once("include/items.php");
  19 require_once("include/tags.php");
  20 require_once("include/files.php");
  21 require_once("include/event.php");
  22 require_once("include/text.php");
  23 require_once("include/oembed.php");
  24 require_once("include/html2bbcode.php");
  25 require_once("include/bbcode.php");
  26 require_once("include/xml.php");
  27
  28 /**
  29  * @brief This class contain functions to create and send DFRN XML files
  30  *
  31  */
  32 class dfrn {
  33
  34         const DFRN_TOP_LEVEL = 0;       // Top level posting
  35         const DFRN_REPLY = 1;           // Regular reply that is stored locally
  36         const DFRN_REPLY_RC = 2;        // Reply that will be relayed
  37
  38         /**
  39          * @brief Generates the atom entries for delivery.php
  40          *
  41          * This function is used whenever content is transmitted via DFRN.
  42          *
  43          * @param array $items Item elements
  44          * @param array $owner Owner record
  45          *
  46          * @return string DFRN entries
  47          * @todo Add type-hints
  48          */
  49         public static function entries($items,$owner) {
  50
  51                 $doc = new DOMDocument('1.0', 'utf-8');
  52                 $doc->formatOutput = true;
  53
  54                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
  55
  56                 if (! count($items)) {
  57                         return trim($doc->saveXML());
  58                 }
  59
  60                 foreach ($items as $item) {
  61                         $entry = self::entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
  62                         $root->appendChild($entry);
  63                 }
  64
  65                 return(trim($doc->saveXML()));
  66         }
  67
  68         /**
  69          * @brief Generate an atom feed for the given user
  70          *
  71          * This function is called when another server is pulling data from the user feed.
  72          *
  73          * @param string $dfrn_id DFRN ID from the requesting party
  74          * @param string $owner_nick Owner nick name
  75          * @param string $last_update Date of the last update
  76          * @param int $direction Can be -1, 0 or 1.
  77          * @param boolean $onlyheader Output only the header without content? (Default is "no")
  78          *
  79          * @return string DFRN feed entries
  80          */
  81         public static function feed($dfrn_id, $owner_nick, $last_update, $direction = 0, $onlyheader = false) {
  82
  83                 $a = get_app();
  84
  85                 $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
  86                 $public_feed = (($dfrn_id) ? false : true);
  87                 $starred     = false;   // not yet implemented, possible security issues
  88                 $converse    = false;
  89
  90                 if ($public_feed && $a->argc > 2) {
  91                         for ($x = 2; $x < $a->argc; $x++) {
  92                                 if ($a->argv[$x] == 'converse') {
  93                                         $converse = true;
  94                                 }
  95                                 if ($a->argv[$x] == 'starred') {
  96                                         $starred = true;
  97                                 }
  98                                 if ($a->argv[$x] == 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1])) {
  99                                         $category = $a->argv[$x+1];
 100                                 }
 101                         }
 102                 }
 103
 104
 105
 106                 // default permissions - anonymous user
 107
 108                 $sql_extra = " AND `item`.`allow_cid` = '' AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = '' ";
 109
 110                 $r = q("SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 111                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 112                         WHERE `contact`.`self` AND `user`.`nickname` = '%s' LIMIT 1",
 113                         dbesc($owner_nick)
 114                 );
 115
 116                 if (! dbm::is_result($r)) {
 117                         killme();
 118                 }
 119
 120                 $owner = $r[0];
 121                 $owner_id = $owner['uid'];
 122                 $owner_nick = $owner['nickname'];
 123
 124                 $sql_post_table = "";
 125
 126                 if (! $public_feed) {
 127
 128                         $sql_extra = '';
 129                         switch($direction) {
 130                                 case (-1):
 131                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 132                                         $my_id = $dfrn_id;
 133                                         break;
 134                                 case 0:
 135                                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 136                                         $my_id = '1:' . $dfrn_id;
 137                                         break;
 138                                 case 1:
 139                                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 140                                         $my_id = '0:' . $dfrn_id;
 141                                         break;
 142                                 default:
 143                                         return false;
 144                                         break; // NOTREACHED
 145                         }
 146
 147                         $r = q("SELECT * FROM `contact` WHERE NOT `blocked` AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 148                                 intval($owner_id)
 149                         );
 150
 151                         if (! dbm::is_result($r)) {
 152                                 killme();
 153                         }
 154
 155                         $contact = $r[0];
 156                         require_once('include/security.php');
 157                         $groups = init_groups_visitor($contact['id']);
 158
 159                         if (count($groups)) {
 160                                 for ($x = 0; $x < count($groups); $x ++)
 161                                         $groups[$x] = '<' . intval($groups[$x]) . '>' ;
 162                                 $gs = implode('|', $groups);
 163                         } else {
 164                                 $gs = '<<>>' ; // Impossible to match
 165                         }
 166
 167                         $sql_extra = sprintf("
 168                                 AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
 169                                 AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
 170                                 AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
 171                                 AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
 172                         ",
 173                                 intval($contact['id']),
 174                                 intval($contact['id']),
 175                                 dbesc($gs),
 176                                 dbesc($gs)
 177                         );
 178                 }
 179
 180                 if ($public_feed) {
 181                         $sort = 'DESC';
 182                 } else {
 183                         $sort = 'ASC';
 184                 }
 185
 186                 if (! strlen($last_update)) {
 187                         $last_update = 'now -30 days';
 188                 }
 189
 190                 if (isset($category)) {
 191                         $sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 192                                         dbesc(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($owner_id));
 193                         //$sql_extra .= file_tag_file_query('item',$category,'category');
 194                 }
 195
 196                 if ($public_feed) {
 197                         if (! $converse) {
 198                                 $sql_extra .= " AND `contact`.`self` = 1 ";
 199                         }
 200                 }
 201
 202                 $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
 203
 204                 $r = q("SELECT `item`.*, `item`.`id` AS `item_id`,
 205                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 206                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 207                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 208                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 209                         FROM `item` USE INDEX (`uid_wall_changed`) $sql_post_table
 210                         STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 211                         AND (NOT `contact`.`blocked` OR `contact`.`pending`)
 212                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 213                         WHERE `item`.`uid` = %d AND `item`.`visible` AND NOT `item`.`moderated` AND `item`.`parent` != 0
 214                         AND `item`.`wall` AND `item`.`changed` > '%s'
 215                         $sql_extra
 216                         ORDER BY `item`.`parent` ".$sort.", `item`.`created` ASC LIMIT 0, 300",
 217                         intval($owner_id),
 218                         dbesc($check_date),
 219                         dbesc($sort)
 220                 );
 221
 222                 /*
 223                  * Will check further below if this actually returned results.
 224                  * We will provide an empty feed if that is the case.
 225                  */
 226
 227                 $items = $r;
 228
 229                 $doc = new DOMDocument('1.0', 'utf-8');
 230                 $doc->formatOutput = true;
 231
 232                 $alternatelink = $owner['url'];
 233
 234                 if (isset($category)) {
 235                         $alternatelink .= "/category/".$category;
 236                 }
 237
 238                 if ($public_feed) {
 239                         $author = "dfrn:owner";
 240                 } else {
 241                         $author = "author";
 242                 }
 243
 244                 $root = self::add_header($doc, $owner, $author, $alternatelink, true);
 245
 246                 /// @TODO This hook can't work anymore
 247                 //      call_hooks('atom_feed', $atom);
 248
 249                 if (!dbm::is_result($items) || $onlyheader) {
 250                         $atom = trim($doc->saveXML());
 251
 252                         call_hooks('atom_feed_end', $atom);
 253
 254                         return $atom;
 255                 }
 256
 257                 foreach ($items as $item) {
 258
 259                         // prevent private email from leaking.
 260                         if ($item['network'] == NETWORK_MAIL) {
 261                                 continue;
 262                         }
 263
 264                         // public feeds get html, our own nodes use bbcode
 265
 266                         if ($public_feed) {
 267                                 $type = 'html';
 268                                 // catch any email that's in a public conversation and make sure it doesn't leak
 269                                 if ($item['private']) {
 270                                         continue;
 271                                 }
 272                         } else {
 273                                 $type = 'text';
 274                         }
 275
 276                         $entry = self::entry($doc, $type, $item, $owner, true);
 277                         $root->appendChild($entry);
 278
 279                 }
 280
 281                 $atom = trim($doc->saveXML());
 282
 283                 call_hooks('atom_feed_end', $atom);
 284
 285                 return $atom;
 286         }
 287
 288         /**
 289          * @brief Generate an atom entry for a given item id
 290          *
 291          * @param int $item_id The item id
 292          *
 293          * @return string DFRN feed entry
 294          */
 295         public static function itemFeed($item_id) {
 296                 $r = q("SELECT `item`.*, `item`.`id` AS `item_id`,
 297                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 298                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 299                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 300                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 301                         FROM `item`
 302                         STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 303                                 AND (NOT `contact`.`blocked` OR `contact`.`pending`)
 304                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 305                         WHERE `item`.`id` = %d AND `item`.`visible` AND NOT `item`.`moderated` AND `item`.`parent` != 0
 306                         AND NOT `item`.`private`",
 307                         intval($item_id)
 308                 );
 309
 310                 if (!dbm::is_result($r)) {
 311                         killme();
 312                 }
 313
 314                 $item = $r[0];
 315
 316                 $r = q("SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 317                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 318                         WHERE `contact`.`self` AND `user`.`uid` = %d LIMIT 1",
 319                         intval($item['uid'])
 320                 );
 321
 322                 if (!dbm::is_result($r)) {
 323                         killme();
 324                 }
 325
 326                 $owner = $r[0];
 327
 328                 $doc = new DOMDocument('1.0', 'utf-8');
 329                 $doc->formatOutput = true;
 330
 331                 $alternatelink = $owner['url'];
 332
 333                 $type = 'html';
 334
 335                 $root = self::entry($doc, $type, $item, $owner, true, 0, true);
 336
 337                 $atom = trim($doc->saveXML());
 338                 return $atom;
 339         }
 340
 341         /**
 342          * @brief Create XML text for DFRN mails
 343          *
 344          * @param array $item message elements
 345          * @param array $owner Owner record
 346          *
 347          * @return string DFRN mail
 348          * @todo Add type-hints
 349          */
 350         public static function mail($item, $owner) {
 351                 $doc = new DOMDocument('1.0', 'utf-8');
 352                 $doc->formatOutput = true;
 353
 354                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 355
 356                 $mail = $doc->createElement("dfrn:mail");
 357                 $sender = $doc->createElement("dfrn:sender");
 358
 359                 xml::add_element($doc, $sender, "dfrn:name", $owner['name']);
 360                 xml::add_element($doc, $sender, "dfrn:uri", $owner['url']);
 361                 xml::add_element($doc, $sender, "dfrn:avatar", $owner['thumb']);
 362
 363                 $mail->appendChild($sender);
 364
 365                 xml::add_element($doc, $mail, "dfrn:id", $item['uri']);
 366                 xml::add_element($doc, $mail, "dfrn:in-reply-to", $item['parent-uri']);
 367                 xml::add_element($doc, $mail, "dfrn:sentdate", datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME));
 368                 xml::add_element($doc, $mail, "dfrn:subject", $item['title']);
 369                 xml::add_element($doc, $mail, "dfrn:content", $item['body']);
 370
 371                 $root->appendChild($mail);
 372
 373                 return(trim($doc->saveXML()));
 374         }
 375
 376         /**
 377          * @brief Create XML text for DFRN friend suggestions
 378          *
 379          * @param array $item suggestion elements
 380          * @param array $owner Owner record
 381          *
 382          * @return string DFRN suggestions
 383          * @todo Add type-hints
 384          */
 385         public static function fsuggest($item, $owner) {
 386                 $doc = new DOMDocument('1.0', 'utf-8');
 387                 $doc->formatOutput = true;
 388
 389                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 390
 391                 $suggest = $doc->createElement("dfrn:suggest");
 392
 393                 xml::add_element($doc, $suggest, "dfrn:url", $item['url']);
 394                 xml::add_element($doc, $suggest, "dfrn:name", $item['name']);
 395                 xml::add_element($doc, $suggest, "dfrn:photo", $item['photo']);
 396                 xml::add_element($doc, $suggest, "dfrn:request", $item['request']);
 397                 xml::add_element($doc, $suggest, "dfrn:note", $item['note']);
 398
 399                 $root->appendChild($suggest);
 400
 401                 return(trim($doc->saveXML()));
 402         }
 403
 404         /**
 405          * @brief Create XML text for DFRN relocations
 406          *
 407          * @param array $owner Owner record
 408          * @param int $uid User ID
 409          *
 410          * @return string DFRN relocations
 411          * @todo Add type-hints
 412          */
 413         public static function relocate($owner, $uid) {
 414
 415                 /* get site pubkey. this could be a new installation with no site keys*/
 416                 $pubkey = get_config('system','site_pubkey');
 417                 if (! $pubkey) {
 418                         $res = new_keypair(1024);
 419                         set_config('system','site_prvkey', $res['prvkey']);
 420                         set_config('system','site_pubkey', $res['pubkey']);
 421                 }
 422
 423                 $rp = q("SELECT `resource-id` , `scale`, type FROM `photo`
 424                                 WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;", $uid);
 425                 $photos = array();
 426                 $ext = Photo::supportedTypes();
 427
 428                 foreach ($rp as $p) {
 429                         $photos[$p['scale']] = System::baseUrl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 430                 }
 431
 432                 unset($rp, $ext);
 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                 $relocate = $doc->createElement("dfrn:relocate");
 440
 441                 xml::add_element($doc, $relocate, "dfrn:url", $owner['url']);
 442                 xml::add_element($doc, $relocate, "dfrn:name", $owner['name']);
 443                 xml::add_element($doc, $relocate, "dfrn:addr", $owner['addr']);
 444                 xml::add_element($doc, $relocate, "dfrn:avatar", $owner['avatar']);
 445                 xml::add_element($doc, $relocate, "dfrn:photo", $photos[4]);
 446                 xml::add_element($doc, $relocate, "dfrn:thumb", $photos[5]);
 447                 xml::add_element($doc, $relocate, "dfrn:micro", $photos[6]);
 448                 xml::add_element($doc, $relocate, "dfrn:request", $owner['request']);
 449                 xml::add_element($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 450                 xml::add_element($doc, $relocate, "dfrn:notify", $owner['notify']);
 451                 xml::add_element($doc, $relocate, "dfrn:poll", $owner['poll']);
 452                 xml::add_element($doc, $relocate, "dfrn:sitepubkey", get_config('system','site_pubkey'));
 453
 454                 $root->appendChild($relocate);
 455
 456                 return(trim($doc->saveXML()));
 457         }
 458
 459         /**
 460          * @brief Adds the header elements for the DFRN protocol
 461          *
 462          * @param object $doc XML document
 463          * @param array $owner Owner record
 464          * @param string $authorelement Element name for the author
 465          * @param string $alternatelink link to profile or category
 466          * @param bool $public Is it a header for public posts?
 467          *
 468          * @return object XML root object
 469          * @todo Add type-hints
 470          */
 471         private static function add_header($doc, $owner, $authorelement, $alternatelink = "", $public = false) {
 472
 473                 if ($alternatelink == "") {
 474                         $alternatelink = $owner['url'];
 475                 }
 476
 477                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 478                 $doc->appendChild($root);
 479
 480                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 481                 $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 482                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 483                 $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 484                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 485                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 486                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 487                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 488                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 489
 490                 xml::add_element($doc, $root, "id", System::baseUrl()."/profile/".$owner["nick"]);
 491                 xml::add_element($doc, $root, "title", $owner["name"]);
 492
 493                 $attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
 494                 xml::add_element($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 495
 496                 $attributes = array("rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/");
 497                 xml::add_element($doc, $root, "link", "", $attributes);
 498
 499                 $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $alternatelink);
 500                 xml::add_element($doc, $root, "link", "", $attributes);
 501
 502
 503                 if ($public) {
 504                         // DFRN itself doesn't uses this. But maybe someone else wants to subscribe to the public feed.
 505                         ostatus::hublinks($doc, $root, $owner["nick"]);
 506
 507                         $attributes = array("rel" => "salmon", "href" => System::baseUrl()."/salmon/".$owner["nick"]);
 508                         xml::add_element($doc, $root, "link", "", $attributes);
 509
 510                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => System::baseUrl()."/salmon/".$owner["nick"]);
 511                         xml::add_element($doc, $root, "link", "", $attributes);
 512
 513                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => System::baseUrl()."/salmon/".$owner["nick"]);
 514                         xml::add_element($doc, $root, "link", "", $attributes);
 515                 }
 516
 517                 // For backward compatibility we keep this element
 518                 if ($owner['page-flags'] == PAGE_COMMUNITY) {
 519                         xml::add_element($doc, $root, "dfrn:community", 1);
 520                 }
 521
 522                 // The former element is replaced by this one
 523                 xml::add_element($doc, $root, "dfrn:account_type", $owner["account-type"]);
 524
 525                 /// @todo We need a way to transmit the different page flags like "PAGE_PRVGROUP"
 526
 527                 xml::add_element($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
 528
 529                 $author = self::add_author($doc, $owner, $authorelement, $public);
 530                 $root->appendChild($author);
 531
 532                 return $root;
 533         }
 534
 535         /**
 536          * @brief Adds the author element in the header for the DFRN protocol
 537          *
 538          * @param object $doc XML document
 539          * @param array $owner Owner record
 540          * @param string $authorelement Element name for the author
 541          *
 542          * @return object XML author object
 543          * @todo Add type-hints
 544          */
 545         private static function add_author($doc, $owner, $authorelement, $public) {
 546
 547                 // Is the profile hidden or shouldn't be published in the net? Then add the "hide" element
 548                 $r = q("SELECT `id` FROM `profile` INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 549                                 WHERE (`hidewall` OR NOT `net-publish`) AND `user`.`uid` = %d",
 550                         intval($owner['uid']));
 551                 if (dbm::is_result($r)) {
 552                         $hidewall = true;
 553                 } else {
 554                         $hidewall = false;
 555                 }
 556
 557                 $author = $doc->createElement($authorelement);
 558
 559                 $namdate = datetime_convert('UTC', 'UTC', $owner['name-date'].'+00:00', ATOM_TIME);
 560                 $uridate = datetime_convert('UTC', 'UTC', $owner['uri-date'].'+00:00', ATOM_TIME);
 561                 $picdate = datetime_convert('UTC', 'UTC', $owner['avatar-date'].'+00:00', ATOM_TIME);
 562
 563                 $attributes = array();
 564
 565                 if (!$public || !$hidewall) {
 566                         $attributes = array("dfrn:updated" => $namdate);
 567                 }
 568
 569                 xml::add_element($doc, $author, "name", $owner["name"], $attributes);
 570                 xml::add_element($doc, $author, "uri", System::baseUrl().'/profile/'.$owner["nickname"], $attributes);
 571                 xml::add_element($doc, $author, "dfrn:handle", $owner["addr"], $attributes);
 572
 573                 $attributes = array("rel" => "photo", "type" => "image/jpeg",
 574                                         "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 575
 576                 if (!$public || !$hidewall) {
 577                         $attributes["dfrn:updated"] = $picdate;
 578                 }
 579
 580                 xml::add_element($doc, $author, "link", "", $attributes);
 581
 582                 $attributes["rel"] = "avatar";
 583                 xml::add_element($doc, $author, "link", "", $attributes);
 584
 585                 if ($hidewall) {
 586                         xml::add_element($doc, $author, "dfrn:hide", "true");
 587                 }
 588
 589                 // The following fields will only be generated if the data isn't meant for a public feed
 590                 if ($public) {
 591                         return $author;
 592                 }
 593
 594                 $birthday = feed_birthday($owner['uid'], $owner['timezone']);
 595
 596                 if ($birthday)
 597                         xml::add_element($doc, $author, "dfrn:birthday", $birthday);
 598
 599                 // Only show contact details when we are allowed to
 600                 $r = q("SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`,
 601                                 `user`.`timezone`, `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
 602                                 `profile`.`pub_keywords`, `profile`.`xmpp`, `profile`.`dob`
 603                         FROM `profile`
 604                                 INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 605                                 WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 606                         intval($owner['uid']));
 607                 if (dbm::is_result($r)) {
 608                         $profile = $r[0];
 609
 610                         xml::add_element($doc, $author, "poco:displayName", $profile["name"]);
 611                         xml::add_element($doc, $author, "poco:updated", $namdate);
 612
 613                         if (trim($profile["dob"]) > '0001-01-01') {
 614                                 xml::add_element($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 615                         }
 616
 617                         xml::add_element($doc, $author, "poco:note", $profile["about"]);
 618                         xml::add_element($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 619
 620                         $savetz = date_default_timezone_get();
 621                         date_default_timezone_set($profile["timezone"]);
 622                         xml::add_element($doc, $author, "poco:utcOffset", date("P"));
 623                         date_default_timezone_set($savetz);
 624
 625                         if (trim($profile["homepage"]) != "") {
 626                                 $urls = $doc->createElement("poco:urls");
 627                                 xml::add_element($doc, $urls, "poco:type", "homepage");
 628                                 xml::add_element($doc, $urls, "poco:value", $profile["homepage"]);
 629                                 xml::add_element($doc, $urls, "poco:primary", "true");
 630                                 $author->appendChild($urls);
 631                         }
 632
 633                         if (trim($profile["pub_keywords"]) != "") {
 634                                 $keywords = explode(",", $profile["pub_keywords"]);
 635
 636                                 foreach ($keywords AS $keyword) {
 637                                         xml::add_element($doc, $author, "poco:tags", trim($keyword));
 638                                 }
 639
 640                         }
 641
 642                         if (trim($profile["xmpp"]) != "") {
 643                                 $ims = $doc->createElement("poco:ims");
 644                                 xml::add_element($doc, $ims, "poco:type", "xmpp");
 645                                 xml::add_element($doc, $ims, "poco:value", $profile["xmpp"]);
 646                                 xml::add_element($doc, $ims, "poco:primary", "true");
 647                                 $author->appendChild($ims);
 648                         }
 649
 650                         if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 651                                 $element = $doc->createElement("poco:address");
 652
 653                                 xml::add_element($doc, $element, "poco:formatted", formatted_location($profile));
 654
 655                                 if (trim($profile["locality"]) != "") {
 656                                         xml::add_element($doc, $element, "poco:locality", $profile["locality"]);
 657                                 }
 658
 659                                 if (trim($profile["region"]) != "") {
 660                                         xml::add_element($doc, $element, "poco:region", $profile["region"]);
 661                                 }
 662
 663                                 if (trim($profile["country-name"]) != "") {
 664                                         xml::add_element($doc, $element, "poco:country", $profile["country-name"]);
 665                                 }
 666
 667                                 $author->appendChild($element);
 668                         }
 669                 }
 670
 671                 return $author;
 672         }
 673
 674         /**
 675          * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 676          *
 677          * @param object $doc XML document
 678          * @param string $element Element name for the author
 679          * @param string $contact_url Link of the contact
 680          * @param array $items Item elements
 681          *
 682          * @return object XML author object
 683          * @todo Add type-hints
 684          */
 685         private static function add_entry_author($doc, $element, $contact_url, $item) {
 686
 687                 $contact = get_contact_details_by_url($contact_url, $item["uid"]);
 688
 689                 $author = $doc->createElement($element);
 690                 xml::add_element($doc, $author, "name", $contact["name"]);
 691                 xml::add_element($doc, $author, "uri", $contact["url"]);
 692                 xml::add_element($doc, $author, "dfrn:handle", $contact["addr"]);
 693
 694                 /// @Todo
 695                 /// - Check real image type and image size
 696                 /// - Check which of these boths elements we should use
 697                 $attributes = array(
 698                                 "rel" => "photo",
 699                                 "type" => "image/jpeg",
 700                                 "media:width" => 80,
 701                                 "media:height" => 80,
 702                                 "href" => $contact["photo"]);
 703                 xml::add_element($doc, $author, "link", "", $attributes);
 704
 705                 $attributes = array(
 706                                 "rel" => "avatar",
 707                                 "type" => "image/jpeg",
 708                                 "media:width" => 80,
 709                                 "media:height" => 80,
 710                                 "href" => $contact["photo"]);
 711                 xml::add_element($doc, $author, "link", "", $attributes);
 712
 713                 return $author;
 714         }
 715
 716         /**
 717          * @brief Adds the activity elements
 718          *
 719          * @param object $doc XML document
 720          * @param string $element Element name for the activity
 721          * @param string $activity activity value
 722          *
 723          * @return object XML activity object
 724          * @todo Add type-hints
 725          */
 726         private static function create_activity($doc, $element, $activity) {
 727
 728                 if ($activity) {
 729                         $entry = $doc->createElement($element);
 730
 731                         $r = parse_xml_string($activity, false);
 732                         if (!$r) {
 733                                 return false;
 734                         }
 735                         if ($r->type) {
 736                                 xml::add_element($doc, $entry, "activity:object-type", $r->type);
 737                         }
 738                         if ($r->id) {
 739                                 xml::add_element($doc, $entry, "id", $r->id);
 740                         }
 741                         if ($r->title) {
 742                                 xml::add_element($doc, $entry, "title", $r->title);
 743                         }
 744
 745                         if ($r->link) {
 746                                 if (substr($r->link, 0, 1) == '<') {
 747                                         if (strstr($r->link, '&') && (! strstr($r->link, '&amp;'))) {
 748                                                 $r->link = str_replace('&', '&amp;', $r->link);
 749                                         }
 750
 751                                         $r->link = preg_replace('/\<link(.*?)\"\>/', '<link$1"/>', $r->link);
 752
 753                                         // XML does need a single element as root element so we add a dummy element here
 754                                         $data = parse_xml_string("<dummy>" . $r->link . "</dummy>", false);
 755                                         if (is_object($data)) {
 756                                                 foreach ($data->link AS $link) {
 757                                                         $attributes = array();
 758                                                         foreach ($link->attributes() AS $parameter => $value) {
 759                                                                 $attributes[$parameter] = $value;
 760                                                         }
 761                                                         xml::add_element($doc, $entry, "link", "", $attributes);
 762                                                 }
 763                                         }
 764                                 } else {
 765                                         $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $r->link);
 766                                         xml::add_element($doc, $entry, "link", "", $attributes);
 767                                 }
 768                         }
 769                         if ($r->content) {
 770                                 xml::add_element($doc, $entry, "content", bbcode($r->content), array("type" => "html"));
 771                         }
 772
 773                         return $entry;
 774                 }
 775
 776                 return false;
 777         }
 778
 779         /**
 780          * @brief Adds the elements for attachments
 781          *
 782          * @param object $doc XML document
 783          * @param object $root XML root
 784          * @param array $item Item element
 785          *
 786          * @return object XML attachment object
 787          * @todo Add type-hints
 788          */
 789         private static function get_attachment($doc, $root, $item) {
 790                 $arr = explode('[/attach],',$item['attach']);
 791                 if (count($arr)) {
 792                         foreach ($arr as $r) {
 793                                 $matches = false;
 794                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|',$r,$matches);
 795                                 if ($cnt) {
 796                                         $attributes = array("rel" => "enclosure",
 797                                                         "href" => $matches[1],
 798                                                         "type" => $matches[3]);
 799
 800                                         if (intval($matches[2])) {
 801                                                 $attributes["length"] = intval($matches[2]);
 802                                         }
 803
 804                                         if (trim($matches[4]) != "") {
 805                                                 $attributes["title"] = trim($matches[4]);
 806                                         }
 807
 808                                         xml::add_element($doc, $root, "link", "", $attributes);
 809                                 }
 810                         }
 811                 }
 812         }
 813
 814         /**
 815          * @brief Adds the "entry" elements for the DFRN protocol
 816          *
 817          * @param object $doc XML document
 818          * @param string $type "text" or "html"
 819          * @param array $item Item element
 820          * @param array $owner Owner record
 821          * @param bool $comment Trigger the sending of the "comment" element
 822          * @param int $cid Contact ID of the recipient
 823          *
 824          * @return object XML entry object
 825          * @todo Add type-hints
 826          */
 827         private static function entry($doc, $type, $item, $owner, $comment = false, $cid = 0, $single = false) {
 828
 829                 $mentioned = array();
 830
 831                 if (!$item['parent']) {
 832                         return;
 833                 }
 834
 835                 if ($item['deleted']) {
 836                         $attributes = array("ref" => $item['uri'], "when" => datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME));
 837                         return xml::create_element($doc, "at:deleted-entry", "", $attributes);
 838                 }
 839
 840                 if (!$single) {
 841                         $entry = $doc->createElement("entry");
 842                 } else {
 843                         $entry = $doc->createElementNS(NAMESPACE_ATOM1, 'entry');
 844                         $doc->appendChild($entry);
 845
 846                         $entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 847                         $entry->setAttribute("xmlns:at", NAMESPACE_TOMB);
 848                         $entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 849                         $entry->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 850                         $entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 851                         $entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 852                         $entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
 853                         $entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 854                         $entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 855                 }
 856
 857                 if ($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid']) {
 858                         $body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
 859                 } else {
 860                         $body = $item['body'];
 861                 }
 862
 863                 // Remove the abstract element. It is only locally important.
 864                 $body = remove_abstract($body);
 865
 866                 if ($type == 'html') {
 867                         $htmlbody = $body;
 868
 869                         if ($item['title'] != "") {
 870                                 $htmlbody = "[b]".$item['title']."[/b]\n\n".$htmlbody;
 871                         }
 872
 873                         $htmlbody = bbcode($htmlbody, false, false, 7);
 874                 }
 875
 876                 $author = self::add_entry_author($doc, "author", $item["author-link"], $item);
 877                 $entry->appendChild($author);
 878
 879                 $dfrnowner = self::add_entry_author($doc, "dfrn:owner", $item["owner-link"], $item);
 880                 $entry->appendChild($dfrnowner);
 881
 882                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 883                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 884                         $parent = q("SELECT `guid`,`plink` FROM `item` WHERE `uri` = '%s' AND `uid` = %d", dbesc($parent_item), intval($item['uid']));
 885                         $attributes = array("ref" => $parent_item, "type" => "text/html",
 886                                                 "href" => $parent[0]['plink'],
 887                                                 "dfrn:diaspora_guid" => $parent[0]['guid']);
 888                         xml::add_element($doc, $entry, "thr:in-reply-to", "", $attributes);
 889                 }
 890
 891                 // Add conversation data. This is used for OStatus
 892                 $conversation_href = System::baseUrl()."/display/".$owner["nick"]."/".$item["parent"];
 893                 $conversation_uri = $conversation_href;
 894
 895                 if (isset($parent_item)) {
 896                         $r = dba::fetch_first("SELECT `conversation-uri`, `conversation-href` FROM `conversation` WHERE `item-uri` = ?", $item['parent-uri']);
 897                         if (dbm::is_result($r)) {
 898                                 if ($r['conversation-uri'] != '') {
 899                                         $conversation_uri = $r['conversation-uri'];
 900                                 }
 901                                 if ($r['conversation-href'] != '') {
 902                                         $conversation_href = $r['conversation-href'];
 903                                 }
 904                         }
 905                 }
 906
 907                 $attributes = array(
 908                                 "href" => $conversation_href,
 909                                 "ref" => $conversation_uri);
 910
 911                 xml::add_element($doc, $entry, "ostatus:conversation", $conversation_uri, $attributes);
 912
 913                 xml::add_element($doc, $entry, "id", $item["uri"]);
 914                 xml::add_element($doc, $entry, "title", $item["title"]);
 915
 916                 xml::add_element($doc, $entry, "published", datetime_convert("UTC","UTC",$item["created"]."+00:00",ATOM_TIME));
 917                 xml::add_element($doc, $entry, "updated", datetime_convert("UTC","UTC",$item["edited"]."+00:00",ATOM_TIME));
 918
 919                 // "dfrn:env" is used to read the content
 920                 xml::add_element($doc, $entry, "dfrn:env", base64url_encode($body, true));
 921
 922                 // The "content" field is not read by the receiver. We could remove it when the type is "text"
 923                 // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
 924                 xml::add_element($doc, $entry, "content", (($type == 'html') ? $htmlbody : $body), array("type" => $type));
 925
 926                 // We save this value in "plink". Maybe we should read it from there as well?
 927                 xml::add_element($doc, $entry, "link", "", array("rel" => "alternate", "type" => "text/html",
 928                                                                 "href" => System::baseUrl()."/display/".$item["guid"]));
 929
 930                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
 931                 // It is included in the rewritten code for completeness
 932                 if ($comment) {
 933                         xml::add_element($doc, $entry, "dfrn:comment-allow", intval($item['last-child']));
 934                 }
 935
 936                 if ($item['location']) {
 937                         xml::add_element($doc, $entry, "dfrn:location", $item['location']);
 938                 }
 939
 940                 if ($item['coord']) {
 941                         xml::add_element($doc, $entry, "georss:point", $item['coord']);
 942                 }
 943
 944                 if (($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid'])) {
 945                         xml::add_element($doc, $entry, "dfrn:private", (($item['private']) ? $item['private'] : 1));
 946                 }
 947
 948                 if ($item['extid']) {
 949                         xml::add_element($doc, $entry, "dfrn:extid", $item['extid']);
 950                 }
 951
 952                 if ($item['bookmark']) {
 953                         xml::add_element($doc, $entry, "dfrn:bookmark", "true");
 954                 }
 955
 956                 if ($item['app']) {
 957                         xml::add_element($doc, $entry, "statusnet:notice_info", "", array("local_id" => $item['id'], "source" => $item['app']));
 958                 }
 959
 960                 xml::add_element($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
 961
 962                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
 963                 // It is needed for relayed comments to Diaspora.
 964                 if ($item['signed_text']) {
 965                         $sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
 966                         xml::add_element($doc, $entry, "dfrn:diaspora_signature", $sign);
 967                 }
 968
 969                 xml::add_element($doc, $entry, "activity:verb", construct_verb($item));
 970
 971                 if ($item['object-type'] != "") {
 972                         xml::add_element($doc, $entry, "activity:object-type", $item['object-type']);
 973                 } elseif ($item['id'] == $item['parent']) {
 974                         xml::add_element($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
 975                 } else {
 976                         xml::add_element($doc, $entry, "activity:object-type", ACTIVITY_OBJ_COMMENT);
 977                 }
 978
 979                 $actobj = self::create_activity($doc, "activity:object", $item['object']);
 980                 if ($actobj) {
 981                         $entry->appendChild($actobj);
 982                 }
 983
 984                 $actarg = self::create_activity($doc, "activity:target", $item['target']);
 985                 if ($actarg) {
 986                         $entry->appendChild($actarg);
 987                 }
 988
 989                 $tags = item_getfeedtags($item);
 990
 991                 if (count($tags)) {
 992                         foreach ($tags as $t) {
 993                                 if (($type != 'html') || ($t[0] != "@")) {
 994                                         xml::add_element($doc, $entry, "category", "", array("scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]));
 995                                 }
 996                         }
 997                 }
 998
 999                 if (count($tags)) {
1000                         foreach ($tags as $t) {
1001                                 if ($t[0] == "@") {
1002                                         $mentioned[$t[1]] = $t[1];
1003                                 }
1004                         }
1005                 }
1006
1007                 foreach ($mentioned AS $mention) {
1008                         $r = q("SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
1009                                 intval($owner["uid"]),
1010                                 dbesc(normalise_link($mention)));
1011
1012                         if (dbm::is_result($r) && ($r[0]["forum"] || $r[0]["prv"])) {
1013                                 xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
1014                                                                                         "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
1015                                                                                         "href" => $mention));
1016                         } else {
1017                                 xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
1018                                                                                         "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
1019                                                                                         "href" => $mention));
1020                         }
1021                 }
1022
1023                 self::get_attachment($doc, $entry, $item);
1024
1025                 return $entry;
1026         }
1027
1028         /**
1029          * @brief encrypts data via AES
1030          *
1031          * @param string $data The data that is to be encrypted
1032          * @param string $key The AES key
1033          *
1034          * @return string encrypted data
1035          */
1036         private static function aes_encrypt($data, $key) {
1037                 return openssl_encrypt($data, 'aes-128-ecb', $key, OPENSSL_RAW_DATA);
1038         }
1039
1040         /**
1041          * @brief decrypts data via AES
1042          *
1043          * @param string $encrypted The encrypted data
1044          * @param string $key The AES key
1045          *
1046          * @return string decrypted data
1047          */
1048         public static function aes_decrypt($encrypted, $key) {
1049                 return openssl_decrypt($encrypted, 'aes-128-ecb', $key, OPENSSL_RAW_DATA);
1050         }
1051
1052         /**
1053          * @brief Delivers the atom content to the contacts
1054          *
1055          * @param array $owner Owner record
1056          * @param array $contactr Contact record of the receiver
1057          * @param string $atom Content that will be transmitted
1058          * @param bool $dissolve (to be documented)
1059          *
1060          * @return int Deliver status. -1 means an error.
1061          * @todo Add array type-hint for $owner, $contact
1062          */
1063         public static function deliver($owner,$contact,$atom, $dissolve = false) {
1064
1065                 $a = get_app();
1066
1067                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
1068
1069                 if ($contact['duplex'] && $contact['dfrn-id']) {
1070                         $idtosend = '0:' . $orig_id;
1071                 }
1072                 if ($contact['duplex'] && $contact['issued-id']) {
1073                         $idtosend = '1:' . $orig_id;
1074                 }
1075
1076                 $rino = get_config('system', 'rino_encrypt');
1077                 $rino = intval($rino);
1078
1079                 logger("Local rino version: ". $rino, LOGGER_DEBUG);
1080
1081                 $ssl_val = intval(get_config('system','ssl_policy'));
1082                 $ssl_policy = '';
1083
1084                 switch ($ssl_val) {
1085                         case SSL_POLICY_FULL:
1086                                 $ssl_policy = 'full';
1087                                 break;
1088                         case SSL_POLICY_SELFSIGN:
1089                                 $ssl_policy = 'self';
1090                                 break;
1091                         case SSL_POLICY_NONE:
1092                         default:
1093                                 $ssl_policy = 'none';
1094                                 break;
1095                 }
1096
1097                 $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
1098
1099                 logger('dfrn_deliver: ' . $url);
1100
1101                 $ret = z_fetch_url($url);
1102
1103                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1104                         return -2; // timed out
1105                 }
1106
1107                 $xml = $ret['body'];
1108
1109                 $curl_stat = $a->get_curl_code();
1110                 if (!$curl_stat) {
1111                         return -3; // timed out
1112                 }
1113
1114                 logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
1115
1116                 if (! $xml) {
1117                         return 3;
1118                 }
1119
1120                 if (strpos($xml,'<?xml') === false) {
1121                         logger('dfrn_deliver: no valid XML returned');
1122                         logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
1123                         return 3;
1124                 }
1125
1126                 $res = parse_xml_string($xml);
1127
1128                 if ((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id))) {
1129                         return (($res->status) ? $res->status : 3);
1130                 }
1131
1132                 $postvars     = array();
1133                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
1134                 $challenge    = hex2bin((string) $res->challenge);
1135                 $perm         = (($res->perm) ? $res->perm : null);
1136                 $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
1137                 $rino_remote_version = intval($res->rino);
1138                 $page         = (($owner['page-flags'] == PAGE_COMMUNITY) ? 1 : 0);
1139
1140                 logger("Remote rino version: ".$rino_remote_version." for ".$contact["url"], LOGGER_DEBUG);
1141
1142                 if ($owner['page-flags'] == PAGE_PRVGROUP) {
1143                         $page = 2;
1144                 }
1145
1146                 $final_dfrn_id = '';
1147
1148                 if ($perm) {
1149                         if ((($perm == 'rw') && (! intval($contact['writable'])))
1150                                 || (($perm == 'r') && (intval($contact['writable'])))) {
1151                                 q("update contact set writable = %d where id = %d",
1152                                         intval(($perm == 'rw') ? 1 : 0),
1153                                         intval($contact['id'])
1154                                 );
1155                                 $contact['writable'] = (string) 1 - intval($contact['writable']);
1156                         }
1157                 }
1158
1159                 if (($contact['duplex'] && strlen($contact['pubkey']))
1160                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1161                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
1162                         openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
1163                         openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
1164                 } else {
1165                         openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
1166                         openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
1167                 }
1168
1169                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
1170
1171                 if (strpos($final_dfrn_id,':') == 1) {
1172                         $final_dfrn_id = substr($final_dfrn_id,2);
1173                 }
1174
1175                 if ($final_dfrn_id != $orig_id) {
1176                         logger('dfrn_deliver: wrong dfrn_id.');
1177                         // did not decode properly - cannot trust this site
1178                         return 3;
1179                 }
1180
1181                 $postvars['dfrn_id']      = $idtosend;
1182                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
1183                 if ($dissolve) {
1184                         $postvars['dissolve'] = '1';
1185                 }
1186
1187
1188                 if ((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1189                         $postvars['data'] = $atom;
1190                         $postvars['perm'] = 'rw';
1191                 } else {
1192                         $postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
1193                         $postvars['perm'] = 'r';
1194                 }
1195
1196                 $postvars['ssl_policy'] = $ssl_policy;
1197
1198                 if ($page) {
1199                         $postvars['page'] = $page;
1200                 }
1201
1202
1203                 if ($rino > 0 && $rino_remote_version > 0 && (! $dissolve)) {
1204                         logger('rino version: '. $rino_remote_version);
1205
1206                         switch ($rino_remote_version) {
1207                                 case 1:
1208                                         // Deprecated rino version!
1209                                         $key = openssl_random_pseudo_bytes(16);
1210                                         $data = self::aes_encrypt($postvars['data'], $key);
1211                                         break;
1212                                 case 2:
1213                                         // RINO 2 based on php-encryption
1214                                         try {
1215                                                 $key = Crypto::createNewRandomKey();
1216                                         } catch (CryptoTestFailed $ex) {
1217                                                 logger('Cannot safely create a key');
1218                                                 return -4;
1219                                         } catch (CannotPerformOperation $ex) {
1220                                                 logger('Cannot safely create a key');
1221                                                 return -5;
1222                                         }
1223                                         try {
1224                                                 $data = Crypto::encrypt($postvars['data'], $key);
1225                                         } catch (CryptoTestFailed $ex) {
1226                                                 logger('Cannot safely perform encryption');
1227                                                 return -6;
1228                                         } catch (CannotPerformOperation $ex) {
1229                                                 logger('Cannot safely perform encryption');
1230                                                 return -7;
1231                                         }
1232                                         break;
1233                                 default:
1234                                         logger("rino: invalid requested verision '$rino_remote_version'");
1235                                         return -8;
1236                         }
1237
1238                         $postvars['rino'] = $rino_remote_version;
1239                         $postvars['data'] = bin2hex($data);
1240
1241                         //logger('rino: sent key = ' . $key, LOGGER_DEBUG);
1242
1243
1244                         if ($dfrn_version >= 2.1) {
1245                                 if (($contact['duplex'] && strlen($contact['pubkey']))
1246                                                 || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1247                                                 || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
1248                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1249                                 } else {
1250                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1251                                 }
1252
1253                         } else {
1254                                 if (($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1255                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1256                                 } else {
1257                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1258                                 }
1259
1260                         }
1261
1262                         logger('md5 rawkey ' . md5($postvars['key']));
1263
1264                         $postvars['key'] = bin2hex($postvars['key']);
1265                 }
1266
1267
1268                 logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars,true), LOGGER_DATA);
1269
1270                 $xml = post_url($contact['notify'], $postvars);
1271
1272                 logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
1273
1274                 $curl_stat = $a->get_curl_code();
1275                 if ((!$curl_stat) || (!strlen($xml))) {
1276                         return -9; // timed out
1277                 }
1278
1279                 if (($curl_stat == 503) && (stristr($a->get_curl_headers(),'retry-after'))) {
1280                         return -10;
1281                 }
1282
1283                 if (strpos($xml,'<?xml') === false) {
1284                         logger('dfrn_deliver: phase 2: no valid XML returned');
1285                         logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
1286                         return 3;
1287                 }
1288
1289                 if ($contact['term-date'] > NULL_DATE) {
1290                         logger("dfrn_deliver: $url back from the dead - removing mark for death");
1291                         require_once('include/Contact.php');
1292                         unmark_for_death($contact);
1293                 }
1294
1295                 $res = parse_xml_string($xml);
1296
1297                 if (!isset($res->status)) {
1298                         return -11;
1299                 }
1300
1301                 if (!empty($res->message)) {
1302                         logger('Delivery returned status '.$res->status.' - '.$res->message, LOGGER_DEBUG);
1303                 }
1304
1305                 return intval($res->status);
1306         }
1307
1308         /**
1309          * @brief Add new birthday event for this person
1310          *
1311          * @param array $contact Contact record
1312          * @param string $birthday Birthday of the contact
1313          * @todo Add array type-hint for $contact
1314          */
1315         private static function birthday_event($contact, $birthday) {
1316
1317                 // Check for duplicates
1318                 $r = q("SELECT `id` FROM `event` WHERE `uid` = %d AND `cid` = %d AND `start` = '%s' AND `type` = '%s' LIMIT 1",
1319                         intval($contact["uid"]),
1320                         intval($contact["id"]),
1321                         dbesc(datetime_convert("UTC","UTC", $birthday)),
1322                         dbesc("birthday"));
1323
1324                 if (dbm::is_result($r)) {
1325                         return;
1326                 }
1327
1328                 logger("updating birthday: ".$birthday." for contact ".$contact["id"]);
1329
1330                 $bdtext = sprintf(t("%s\'s birthday"), $contact["name"]);
1331                 $bdtext2 = sprintf(t("Happy Birthday %s"), " [url=".$contact["url"]."]".$contact["name"]."[/url]") ;
1332
1333                 $r = q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`)
1334                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s') ",
1335                         intval($contact["uid"]),
1336                         intval($contact["id"]),
1337                         dbesc(datetime_convert()),
1338                         dbesc(datetime_convert()),
1339                         dbesc(datetime_convert("UTC","UTC", $birthday)),
1340                         dbesc(datetime_convert("UTC","UTC", $birthday." + 1 day ")),
1341                         dbesc($bdtext),
1342                         dbesc($bdtext2),
1343                         dbesc("birthday")
1344                 );
1345         }
1346
1347         /**
1348          * @brief Fetch the author data from head or entry items
1349          *
1350          * @param object $xpath XPath object
1351          * @param object $context In which context should the data be searched
1352          * @param array $importer Record of the importer user mixed with contact of the content
1353          * @param string $element Element name from which the data is fetched
1354          * @param bool $onlyfetch Should the data only be fetched or should it update the contact record as well
1355          *
1356          * @return Returns an array with relevant data of the author
1357          * @todo Find good type-hints for all parameter
1358          */
1359         private static function fetchauthor($xpath, $context, $importer, $element, $onlyfetch, $xml = "") {
1360
1361                 $author = array();
1362                 $author["name"] = $xpath->evaluate($element."/atom:name/text()", $context)->item(0)->nodeValue;
1363                 $author["link"] = $xpath->evaluate($element."/atom:uri/text()", $context)->item(0)->nodeValue;
1364
1365                 $r = q("SELECT `id`, `uid`, `url`, `network`, `avatar-date`, `name-date`, `uri-date`, `addr`,
1366                                 `name`, `nick`, `about`, `location`, `keywords`, `xmpp`, `bdyear`, `bd`, `hidden`, `contact-type`
1367                                 FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND `network` != '%s'",
1368                         intval($importer["uid"]), dbesc(normalise_link($author["link"])), dbesc(NETWORK_STATUSNET));
1369
1370                 if (dbm::is_result($r)) {
1371                         $contact = $r[0];
1372                         $author["contact-id"] = $r[0]["id"];
1373                         $author["network"] = $r[0]["network"];
1374                 } else {
1375                         if (!$onlyfetch) {
1376                                 logger("Contact ".$author["link"]." wasn't found for user ".$importer["uid"]." XML: ".$xml, LOGGER_DEBUG);
1377                         }
1378
1379                         $author["contact-id"] = $importer["id"];
1380                         $author["network"] = $importer["network"];
1381                         $onlyfetch = true;
1382                 }
1383
1384                 // Until now we aren't serving different sizes - but maybe later
1385                 $avatarlist = array();
1386                 /// @todo check if "avatar" or "photo" would be the best field in the specification
1387                 $avatars = $xpath->query($element."/atom:link[@rel='avatar']", $context);
1388                 foreach ($avatars AS $avatar) {
1389                         $href = "";
1390                         $width = 0;
1391                         foreach ($avatar->attributes AS $attributes) {
1392                                 /// @TODO Rewrite these similar if () to one switch
1393                                 if ($attributes->name == "href") {
1394                                         $href = $attributes->textContent;
1395                                 }
1396                                 if ($attributes->name == "width") {
1397                                         $width = $attributes->textContent;
1398                                 }
1399                                 if ($attributes->name == "updated") {
1400                                         $contact["avatar-date"] = $attributes->textContent;
1401                                 }
1402                         }
1403                         if (($width > 0) && ($href != "")) {
1404                                 $avatarlist[$width] = $href;
1405                         }
1406                 }
1407                 if (count($avatarlist) > 0) {
1408                         krsort($avatarlist);
1409                         $author["avatar"] = current($avatarlist);
1410                 }
1411
1412                 if (dbm::is_result($r) && !$onlyfetch) {
1413                         logger("Check if contact details for contact " . $r[0]["id"] . " (" . $r[0]["nick"] . ") have to be updated.", LOGGER_DEBUG);
1414
1415                         $poco = array("url" => $contact["url"]);
1416
1417                         // When was the last change to name or uri?
1418                         $name_element = $xpath->query($element . "/atom:name", $context)->item(0);
1419                         foreach ($name_element->attributes AS $attributes) {
1420                                 if ($attributes->name == "updated") {
1421                                         $poco["name-date"] = $attributes->textContent;
1422                                 }
1423                         }
1424
1425                         $link_element = $xpath->query($element . "/atom:link", $context)->item(0);
1426                         foreach ($link_element->attributes AS $attributes) {
1427                                 if ($attributes->name == "updated") {
1428                                         $poco["uri-date"] = $attributes->textContent;
1429                                 }
1430                         }
1431
1432                         // Update contact data
1433                         $value = $xpath->evaluate($element . "/dfrn:handle/text()", $context)->item(0)->nodeValue;
1434                         if ($value != "") {
1435                                 $poco["addr"] = $value;
1436                         }
1437
1438                         $value = $xpath->evaluate($element . "/poco:displayName/text()", $context)->item(0)->nodeValue;
1439                         if ($value != "") {
1440                                 $poco["name"] = $value;
1441                         }
1442
1443                         $value = $xpath->evaluate($element . "/poco:preferredUsername/text()", $context)->item(0)->nodeValue;
1444                         if ($value != "") {
1445                                 $poco["nick"] = $value;
1446                         }
1447
1448                         $value = $xpath->evaluate($element . "/poco:note/text()", $context)->item(0)->nodeValue;
1449                         if ($value != "") {
1450                                 $poco["about"] = $value;
1451                         }
1452
1453                         $value = $xpath->evaluate($element . "/poco:address/poco:formatted/text()", $context)->item(0)->nodeValue;
1454                         if ($value != "") {
1455                                 $poco["location"] = $value;
1456                         }
1457
1458                         /// @todo Only search for elements with "poco:type" = "xmpp"
1459                         $value = $xpath->evaluate($element . "/poco:ims/poco:value/text()", $context)->item(0)->nodeValue;
1460                         if ($value != "") {
1461                                 $poco["xmpp"] = $value;
1462                         }
1463
1464                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1465                         /// - poco:utcOffset
1466                         /// - poco:urls
1467                         /// - poco:locality
1468                         /// - poco:region
1469                         /// - poco:country
1470
1471                         // If the "hide" element is present then the profile isn't searchable.
1472                         $hide = intval($xpath->evaluate($element . "/dfrn:hide/text()", $context)->item(0)->nodeValue == "true");
1473
1474                         logger("Hidden status for contact " . $contact["url"] . ": " . $hide, LOGGER_DEBUG);
1475
1476                         // If the contact isn't searchable then set the contact to "hidden".
1477                         // Problem: This can be manually overridden by the user.
1478                         if ($hide) {
1479                                 $contact["hidden"] = true;
1480                         }
1481
1482                         // Save the keywords into the contact table
1483                         $tags = array();
1484                         $tagelements = $xpath->evaluate($element . "/poco:tags/text()", $context);
1485                         foreach ($tagelements AS $tag) {
1486                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1487                         }
1488
1489                         if (count($tags)) {
1490                                 $poco["keywords"] = implode(", ", $tags);
1491                         }
1492
1493                         // "dfrn:birthday" contains the birthday converted to UTC
1494                         $old_bdyear = $contact["bdyear"];
1495
1496                         $birthday = $xpath->evaluate($element . "/dfrn:birthday/text()", $context)->item(0)->nodeValue;
1497
1498                         if (strtotime($birthday) > time()) {
1499                                 $bd_timestamp = strtotime($birthday);
1500
1501                                 $poco["bdyear"] = date("Y", $bd_timestamp);
1502                         }
1503
1504                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1505                         $value = $xpath->evaluate($element . "/poco:birthday/text()", $context)->item(0)->nodeValue;
1506
1507                         if (!in_array($value, array("", "0000-00-00", "0001-01-01"))) {
1508                                 $bdyear = date("Y");
1509                                 $value = str_replace("0000", $bdyear, $value);
1510
1511                                 if (strtotime($value) < time()) {
1512                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1513                                         $bdyear = $bdyear + 1;
1514                                 }
1515
1516                                 $poco["bd"] = $value;
1517                         }
1518
1519                         $contact = array_merge($contact, $poco);
1520
1521                         if ($old_bdyear != $contact["bdyear"]) {
1522                                 self::birthday_event($contact, $birthday);
1523                         }
1524
1525                         // Get all field names
1526                         $fields = array();
1527                         foreach ($r[0] AS $field => $data) {
1528                                 $fields[$field] = $data;
1529                         }
1530
1531                         unset($fields["id"]);
1532                         unset($fields["uid"]);
1533                         unset($fields["url"]);
1534                         unset($fields["avatar-date"]);
1535                         unset($fields["name-date"]);
1536                         unset($fields["uri-date"]);
1537
1538                         // Update check for this field has to be done differently
1539                         $datefields = array("name-date", "uri-date");
1540                         foreach ($datefields AS $field) {
1541                                 if (strtotime($contact[$field]) > strtotime($r[0][$field])) {
1542                                         logger("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $r[0][$field] . "'", LOGGER_DEBUG);
1543                                         $update = true;
1544                                 }
1545                         }
1546
1547                         foreach ($fields AS $field => $data) {
1548                                 if ($contact[$field] != $r[0][$field]) {
1549                                         logger("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $r[0][$field] . "'", LOGGER_DEBUG);
1550                                         $update = true;
1551                                 }
1552                         }
1553
1554                         if ($update) {
1555                                 logger("Update contact data for contact " . $contact["id"] . " (" . $contact["nick"] . ")", LOGGER_DEBUG);
1556
1557                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `about` = '%s', `location` = '%s',
1558                                         `addr` = '%s', `keywords` = '%s', `bdyear` = '%s', `bd` = '%s', `hidden` = %d,
1559                                         `xmpp` = '%s', `name-date`  = '%s', `uri-date` = '%s'
1560                                         WHERE `id` = %d AND `network` = '%s'",
1561                                         dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["about"]), dbesc($contact["location"]),
1562                                         dbesc($contact["addr"]), dbesc($contact["keywords"]), dbesc($contact["bdyear"]),
1563                                         dbesc($contact["bd"]), intval($contact["hidden"]), dbesc($contact["xmpp"]),
1564                                         dbesc(dbm::date($contact["name-date"])), dbesc(dbm::date($contact["uri-date"])),
1565                                         intval($contact["id"]), dbesc($contact["network"]));
1566                         }
1567
1568                         update_contact_avatar($author["avatar"], $importer["uid"], $contact["id"],
1569                                                 (strtotime($contact["avatar-date"]) > strtotime($r[0]["avatar-date"])));
1570
1571                         /*
1572                          * The generation is a sign for the reliability of the provided data.
1573                          * It is used in the socgraph.php to prevent that old contact data
1574                          * that was relayed over several servers can overwrite contact
1575                          * data that we received directly.
1576                          */
1577
1578                         $poco["generation"] = 2;
1579                         $poco["photo"] = $author["avatar"];
1580                         $poco["hide"] = $hide;
1581                         $poco["contact-type"] = $contact["contact-type"];
1582                         $gcid = update_gcontact($poco);
1583
1584                         link_gcontact($gcid, $importer["uid"], $contact["id"]);
1585                 }
1586
1587                 return($author);
1588         }
1589
1590         /**
1591          * @brief Transforms activity objects into an XML string
1592          *
1593          * @param object $xpath XPath object
1594          * @param object $activity Activity object
1595          * @param text $element element name
1596          *
1597          * @return string XML string
1598          * @todo Find good type-hints for all parameter
1599          */
1600         private static function transform_activity($xpath, $activity, $element) {
1601                 if (!is_object($activity)) {
1602                         return "";
1603                 }
1604
1605                 $obj_doc = new DOMDocument("1.0", "utf-8");
1606                 $obj_doc->formatOutput = true;
1607
1608                 $obj_element = $obj_doc->createElementNS(NAMESPACE_ATOM1, $element);
1609
1610                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1611                 xml::add_element($obj_doc, $obj_element, "type", $activity_type);
1612
1613                 $id = $xpath->query("atom:id", $activity)->item(0);
1614                 if (is_object($id)) {
1615                         $obj_element->appendChild($obj_doc->importNode($id, true));
1616                 }
1617
1618                 $title = $xpath->query("atom:title", $activity)->item(0);
1619                 if (is_object($title)) {
1620                         $obj_element->appendChild($obj_doc->importNode($title, true));
1621                 }
1622
1623                 $links = $xpath->query("atom:link", $activity);
1624                 if (is_object($links)) {
1625                         foreach ($links AS $link) {
1626                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1627                         }
1628                 }
1629
1630                 $content = $xpath->query("atom:content", $activity)->item(0);
1631                 if (is_object($content)) {
1632                         $obj_element->appendChild($obj_doc->importNode($content, true));
1633                 }
1634
1635                 $obj_doc->appendChild($obj_element);
1636
1637                 $objxml = $obj_doc->saveXML($obj_element);
1638
1639                 /// @todo This isn't totally clean. We should find a way to transform the namespaces
1640                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1641                 return($objxml);
1642         }
1643
1644         /**
1645          * @brief Processes the mail elements
1646          *
1647          * @param object $xpath XPath object
1648          * @param object $mail mail elements
1649          * @param array $importer Record of the importer user mixed with contact of the content
1650          * @todo Find good type-hints for all parameter
1651          */
1652         private static function process_mail($xpath, $mail, $importer) {
1653
1654                 logger("Processing mails");
1655
1656                 /// @TODO Rewrite this to one statement
1657                 $msg = array();
1658                 $msg["uid"] = $importer["importer_uid"];
1659                 $msg["from-name"] = $xpath->query("dfrn:sender/dfrn:name/text()", $mail)->item(0)->nodeValue;
1660                 $msg["from-url"] = $xpath->query("dfrn:sender/dfrn:uri/text()", $mail)->item(0)->nodeValue;
1661                 $msg["from-photo"] = $xpath->query("dfrn:sender/dfrn:avatar/text()", $mail)->item(0)->nodeValue;
1662                 $msg["contact-id"] = $importer["id"];
1663                 $msg["uri"] = $xpath->query("dfrn:id/text()", $mail)->item(0)->nodeValue;
1664                 $msg["parent-uri"] = $xpath->query("dfrn:in-reply-to/text()", $mail)->item(0)->nodeValue;
1665                 $msg["created"] = $xpath->query("dfrn:sentdate/text()", $mail)->item(0)->nodeValue;
1666                 $msg["title"] = $xpath->query("dfrn:subject/text()", $mail)->item(0)->nodeValue;
1667                 $msg["body"] = $xpath->query("dfrn:content/text()", $mail)->item(0)->nodeValue;
1668                 $msg["seen"] = 0;
1669                 $msg["replied"] = 0;
1670
1671                 dbm::esc_array($msg, true);
1672
1673                 $r = dbq("INSERT INTO `mail` (`".implode("`, `", array_keys($msg))."`) VALUES (".implode(", ", array_values($msg)).")");
1674
1675                 // send notifications.
1676                 /// @TODO Arange this mess
1677                 $notif_params = array(
1678                         "type" => NOTIFY_MAIL,
1679                         "notify_flags" => $importer["notify-flags"],
1680                         "language" => $importer["language"],
1681                         "to_name" => $importer["username"],
1682                         "to_email" => $importer["email"],
1683                         "uid" => $importer["importer_uid"],
1684                         "item" => $msg,
1685                         "source_name" => $msg["from-name"],
1686                         "source_link" => $importer["url"],
1687                         "source_photo" => $importer["thumb"],
1688                         "verb" => ACTIVITY_POST,
1689                         "otype" => "mail"
1690                 );
1691
1692                 notification($notif_params);
1693
1694                 logger("Mail is processed, notification was sent.");
1695         }
1696
1697         /**
1698          * @brief Processes the suggestion elements
1699          *
1700          * @param object $xpath XPath object
1701          * @param object $suggestion suggestion elements
1702          * @param array $importer Record of the importer user mixed with contact of the content
1703          * @todo Find good type-hints for all parameter
1704          */
1705         private static function process_suggestion($xpath, $suggestion, $importer) {
1706                 $a = get_app();
1707
1708                 logger("Processing suggestions");
1709
1710                 /// @TODO Rewrite this to one statement
1711                 $suggest = array();
1712                 $suggest["uid"] = $importer["importer_uid"];
1713                 $suggest["cid"] = $importer["id"];
1714                 $suggest["url"] = $xpath->query("dfrn:url/text()", $suggestion)->item(0)->nodeValue;
1715                 $suggest["name"] = $xpath->query("dfrn:name/text()", $suggestion)->item(0)->nodeValue;
1716                 $suggest["photo"] = $xpath->query("dfrn:photo/text()", $suggestion)->item(0)->nodeValue;
1717                 $suggest["request"] = $xpath->query("dfrn:request/text()", $suggestion)->item(0)->nodeValue;
1718                 $suggest["body"] = $xpath->query("dfrn:note/text()", $suggestion)->item(0)->nodeValue;
1719
1720                 // Does our member already have a friend matching this description?
1721
1722                 $r = q("SELECT `id` FROM `contact` WHERE `name` = '%s' AND `nurl` = '%s' AND `uid` = %d LIMIT 1",
1723                         dbesc($suggest["name"]),
1724                         dbesc(normalise_link($suggest["url"])),
1725                         intval($suggest["uid"])
1726                 );
1727
1728                 /*
1729                  * The valid result means the friend we're about to send a friend
1730                  * suggestion already has them in their contact, which means no further
1731                  * action is required.
1732                  *
1733                  * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
1734                  */
1735                 if (dbm::is_result($r)) {
1736                         return false;
1737                 }
1738
1739                 // Do we already have an fcontact record for this person?
1740
1741                 $fid = 0;
1742                 $r = q("SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1743                         dbesc($suggest["url"]),
1744                         dbesc($suggest["name"]),
1745                         dbesc($suggest["request"])
1746                 );
1747                 if (dbm::is_result($r)) {
1748                         $fid = $r[0]["id"];
1749
1750                         // OK, we do. Do we already have an introduction for this person ?
1751                         $r = q("SELECT `id` FROM `intro` WHERE `uid` = %d AND `fid` = %d LIMIT 1",
1752                                 intval($suggest["uid"]),
1753                                 intval($fid)
1754                         );
1755
1756                         /*
1757                          * The valid result means the friend we're about to send a friend
1758                          * suggestion already has them in their contact, which means no further
1759                          * action is required.
1760                          *
1761                          * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
1762                          */
1763                         if (dbm::is_result($r)) {
1764                                 return false;
1765                         }
1766                 }
1767                 if (!$fid) {
1768                         $r = q("INSERT INTO `fcontact` (`name`,`url`,`photo`,`request`) VALUES ('%s', '%s', '%s', '%s')",
1769                                 dbesc($suggest["name"]),
1770                                 dbesc($suggest["url"]),
1771                                 dbesc($suggest["photo"]),
1772                                 dbesc($suggest["request"])
1773                         );
1774                 }
1775                 $r = q("SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1776                         dbesc($suggest["url"]),
1777                         dbesc($suggest["name"]),
1778                         dbesc($suggest["request"])
1779                 );
1780
1781                 /*
1782                  * If no record in fcontact is found, below INSERT statement will not
1783                  * link an introduction to it.
1784                  */
1785                 if (!dbm::is_result($r)) {
1786                         // database record did not get created. Quietly give up.
1787                         killme();
1788                 }
1789
1790                 $fid = $r[0]["id"];
1791
1792                 $hash = random_string();
1793
1794                 $r = q("INSERT INTO `intro` (`uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked`)
1795                         VALUES(%d, %d, %d, '%s', '%s', '%s', %d)",
1796                         intval($suggest["uid"]),
1797                         intval($fid),
1798                         intval($suggest["cid"]),
1799                         dbesc($suggest["body"]),
1800                         dbesc($hash),
1801                         dbesc(datetime_convert()),
1802                         intval(0)
1803                 );
1804
1805                 notification(array(
1806                         "type"         => NOTIFY_SUGGEST,
1807                         "notify_flags" => $importer["notify-flags"],
1808                         "language"     => $importer["language"],
1809                         "to_name"      => $importer["username"],
1810                         "to_email"     => $importer["email"],
1811                         "uid"          => $importer["importer_uid"],
1812                         "item"         => $suggest,
1813                         "link"         => System::baseUrl()."/notifications/intros",
1814                         "source_name"  => $importer["name"],
1815                         "source_link"  => $importer["url"],
1816                         "source_photo" => $importer["photo"],
1817                         "verb"         => ACTIVITY_REQ_FRIEND,
1818                         "otype"        => "intro"
1819                 ));
1820
1821                 return true;
1822
1823         }
1824
1825         /**
1826          * @brief Processes the relocation elements
1827          *
1828          * @param object $xpath XPath object
1829          * @param object $relocation relocation elements
1830          * @param array $importer Record of the importer user mixed with contact of the content
1831          * @todo Find good type-hints for all parameter
1832          */
1833         private static function process_relocation($xpath, $relocation, $importer) {
1834
1835                 logger("Processing relocations");
1836
1837                 /// @TODO Rewrite this to one statement
1838                 $relocate = array();
1839                 $relocate["uid"] = $importer["importer_uid"];
1840                 $relocate["cid"] = $importer["id"];
1841                 $relocate["url"] = $xpath->query("dfrn:url/text()", $relocation)->item(0)->nodeValue;
1842                 $relocate["addr"] = $xpath->query("dfrn:addr/text()", $relocation)->item(0)->nodeValue;
1843                 $relocate["name"] = $xpath->query("dfrn:name/text()", $relocation)->item(0)->nodeValue;
1844                 $relocate["avatar"] = $xpath->query("dfrn:avatar/text()", $relocation)->item(0)->nodeValue;
1845                 $relocate["photo"] = $xpath->query("dfrn:photo/text()", $relocation)->item(0)->nodeValue;
1846                 $relocate["thumb"] = $xpath->query("dfrn:thumb/text()", $relocation)->item(0)->nodeValue;
1847                 $relocate["micro"] = $xpath->query("dfrn:micro/text()", $relocation)->item(0)->nodeValue;
1848                 $relocate["request"] = $xpath->query("dfrn:request/text()", $relocation)->item(0)->nodeValue;
1849                 $relocate["confirm"] = $xpath->query("dfrn:confirm/text()", $relocation)->item(0)->nodeValue;
1850                 $relocate["notify"] = $xpath->query("dfrn:notify/text()", $relocation)->item(0)->nodeValue;
1851                 $relocate["poll"] = $xpath->query("dfrn:poll/text()", $relocation)->item(0)->nodeValue;
1852                 $relocate["sitepubkey"] = $xpath->query("dfrn:sitepubkey/text()", $relocation)->item(0)->nodeValue;
1853
1854                 if (($relocate["avatar"] == "") && ($relocate["photo"] != "")) {
1855                         $relocate["avatar"] = $relocate["photo"];
1856                 }
1857
1858                 if ($relocate["addr"] == "") {
1859                         $relocate["addr"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$3@$2", $relocate["url"]);
1860                 }
1861
1862                 // update contact
1863                 $r = q("SELECT `photo`, `url` FROM `contact` WHERE `id` = %d AND `uid` = %d;",
1864                         intval($importer["id"]),
1865                         intval($importer["importer_uid"]));
1866
1867                 if (!dbm::is_result($r)) {
1868                         logger("Query failed to execute, no result returned in " . __FUNCTION__);
1869                         return false;
1870                 }
1871
1872                 $old = $r[0];
1873
1874                 // Update the gcontact entry
1875                 $relocate["server_url"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $relocate["url"]);
1876
1877                 $x = q("UPDATE `gcontact` SET
1878                                         `name` = '%s',
1879                                         `photo` = '%s',
1880                                         `url` = '%s',
1881                                         `nurl` = '%s',
1882                                         `addr` = '%s',
1883                                         `connect` = '%s',
1884                                         `notify` = '%s',
1885                                         `server_url` = '%s'
1886                         WHERE `nurl` = '%s';",
1887                                         dbesc($relocate["name"]),
1888                                         dbesc($relocate["avatar"]),
1889                                         dbesc($relocate["url"]),
1890                                         dbesc(normalise_link($relocate["url"])),
1891                                         dbesc($relocate["addr"]),
1892                                         dbesc($relocate["addr"]),
1893                                         dbesc($relocate["notify"]),
1894                                         dbesc($relocate["server_url"]),
1895                                         dbesc(normalise_link($old["url"])));
1896
1897                 // Update the contact table. We try to find every entry.
1898                 $x = q("UPDATE `contact` SET
1899                                         `name` = '%s',
1900                                         `avatar` = '%s',
1901                                         `url` = '%s',
1902                                         `nurl` = '%s',
1903                                         `addr` = '%s',
1904                                         `request` = '%s',
1905                                         `confirm` = '%s',
1906                                         `notify` = '%s',
1907                                         `poll` = '%s',
1908                                         `site-pubkey` = '%s'
1909                         WHERE (`id` = %d AND `uid` = %d) OR (`nurl` = '%s');",
1910                                         dbesc($relocate["name"]),
1911                                         dbesc($relocate["avatar"]),
1912                                         dbesc($relocate["url"]),
1913                                         dbesc(normalise_link($relocate["url"])),
1914                                         dbesc($relocate["addr"]),
1915                                         dbesc($relocate["request"]),
1916                                         dbesc($relocate["confirm"]),
1917                                         dbesc($relocate["notify"]),
1918                                         dbesc($relocate["poll"]),
1919                                         dbesc($relocate["sitepubkey"]),
1920                                         intval($importer["id"]),
1921                                         intval($importer["importer_uid"]),
1922                                         dbesc(normalise_link($old["url"])));
1923
1924                 update_contact_avatar($relocate["avatar"], $importer["importer_uid"], $importer["id"], true);
1925
1926                 if ($x === false) {
1927                         return false;
1928                 }
1929
1930                 // update items
1931                 /// @todo This is an extreme performance killer
1932                 $fields = array(
1933                         'owner-link' => array($old["url"], $relocate["url"]),
1934                         'author-link' => array($old["url"], $relocate["url"]),
1935                         //'owner-avatar' => array($old["photo"], $relocate["photo"]),
1936                         //'author-avatar' => array($old["photo"], $relocate["photo"]),
1937                 );
1938                 foreach ($fields as $n=>$f) {
1939                         $r = q("SELECT `id` FROM `item` WHERE `%s` = '%s' AND `uid` = %d LIMIT 1",
1940                                         $n, dbesc($f[0]),
1941                                         intval($importer["importer_uid"]));
1942
1943                         if (dbm::is_result($r)) {
1944                                 $x = q("UPDATE `item` SET `%s` = '%s' WHERE `%s` = '%s' AND `uid` = %d",
1945                                                 $n, dbesc($f[1]),
1946                                                 $n, dbesc($f[0]),
1947                                                 intval($importer["importer_uid"]));
1948
1949                                         if ($x === false) {
1950                                                 return false;
1951                                         }
1952                         }
1953                 }
1954
1955                 /// @TODO
1956                 /// merge with current record, current contents have priority
1957                 /// update record, set url-updated
1958                 /// update profile photos
1959                 /// schedule a scan?
1960                 return true;
1961         }
1962
1963         /**
1964          * @brief Updates an item
1965          *
1966          * @param array $current the current item record
1967          * @param array $item the new item record
1968          * @param array $importer Record of the importer user mixed with contact of the content
1969          * @param int $entrytype Is it a toplevel entry, a comment or a relayed comment?
1970          * @todo set proper type-hints (array?)
1971          */
1972         private static function update_content($current, $item, $importer, $entrytype) {
1973                 $changed = false;
1974
1975                 if (edited_timestamp_is_newer($current, $item)) {
1976
1977                         // do not accept (ignore) an earlier edit than one we currently have.
1978                         if (datetime_convert("UTC","UTC",$item["edited"]) < $current["edited"]) {
1979                                 return false;
1980                         }
1981
1982                         $r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s', `changed` = '%s' WHERE `uri` = '%s' AND `uid` IN (0, %d)",
1983                                 dbesc($item["title"]),
1984                                 dbesc($item["body"]),
1985                                 dbesc($item["tag"]),
1986                                 dbesc(datetime_convert("UTC","UTC",$item["edited"])),
1987                                 dbesc(datetime_convert()),
1988                                 dbesc($item["uri"]),
1989                                 intval($importer["importer_uid"])
1990                         );
1991                         create_tags_from_itemuri($item["uri"], $importer["importer_uid"]);
1992                         update_thread_uri($item["uri"], $importer["importer_uid"]);
1993
1994                         $changed = true;
1995
1996                         if ($entrytype == DFRN_REPLY_RC) {
1997                                 proc_run(PRIORITY_HIGH, "include/notifier.php","comment-import", $current["id"]);
1998                         }
1999                 }
2000
2001                 // update last-child if it changes
2002                 if ($item["last-child"] && ($item["last-child"] != $current["last-child"])) {
2003                         $r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` IN (0, %d)",
2004                                 dbesc(datetime_convert()),
2005                                 dbesc($item["parent-uri"]),
2006                                 intval($importer["importer_uid"])
2007                         );
2008                         $r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` IN (0, %d)",
2009                                 intval($item["last-child"]),
2010                                 dbesc(datetime_convert()),
2011                                 dbesc($item["uri"]),
2012                                 intval($importer["importer_uid"])
2013                         );
2014                 }
2015                 return $changed;
2016         }
2017
2018         /**
2019          * @brief Detects the entry type of the item
2020          *
2021          * @param array $importer Record of the importer user mixed with contact of the content
2022          * @param array $item the new item record
2023          *
2024          * @return int Is it a toplevel entry, a comment or a relayed comment?
2025          * @todo set proper type-hints (array?)
2026          */
2027         private static function get_entry_type($importer, $item) {
2028                 if ($item["parent-uri"] != $item["uri"]) {
2029                         $community = false;
2030
2031                         if ($importer["page-flags"] == PAGE_COMMUNITY || $importer["page-flags"] == PAGE_PRVGROUP) {
2032                                 $sql_extra = "";
2033                                 $community = true;
2034                                 logger("possible community action");
2035                         } else {
2036                                 $sql_extra = " AND `contact`.`self` AND `item`.`wall` ";
2037                         }
2038
2039                         // was the top-level post for this action written by somebody on this site?
2040                         // Specifically, the recipient?
2041
2042                         $is_a_remote_action = false;
2043
2044                         $r = q("SELECT `item`.`parent-uri` FROM `item`
2045                                 WHERE `item`.`uri` = '%s'
2046                                 LIMIT 1",
2047                                 dbesc($item["parent-uri"])
2048                         );
2049                         if (dbm::is_result($r)) {
2050                                 $r = q("SELECT `item`.`forum_mode`, `item`.`wall` FROM `item`
2051                                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
2052                                         WHERE `item`.`uri` = '%s' AND (`item`.`parent-uri` = '%s' OR `item`.`thr-parent` = '%s')
2053                                         AND `item`.`uid` = %d
2054                                         $sql_extra
2055                                         LIMIT 1",
2056                                         dbesc($r[0]["parent-uri"]),
2057                                         dbesc($r[0]["parent-uri"]),
2058                                         dbesc($r[0]["parent-uri"]),
2059                                         intval($importer["importer_uid"])
2060                                 );
2061                                 if (dbm::is_result($r)) {
2062                                         $is_a_remote_action = true;
2063                                 }
2064                         }
2065
2066                         /*
2067                          * Does this have the characteristics of a community or private group action?
2068                          * If it's an action to a wall post on a community/prvgroup page it's a
2069                          * valid community action. Also forum_mode makes it valid for sure.
2070                          * If neither, it's not.
2071                          */
2072
2073                         /// @TODO Maybe merge these if() blocks into one?
2074                         if ($is_a_remote_action && $community && (!$r[0]["forum_mode"]) && (!$r[0]["wall"])) {
2075                                 $is_a_remote_action = false;
2076                                 logger("not a community action");
2077                         }
2078
2079                         if ($is_a_remote_action) {
2080                                 return DFRN_REPLY_RC;
2081                         } else {
2082                                 return DFRN_REPLY;
2083                         }
2084                 } else {
2085                         return DFRN_TOP_LEVEL;
2086                 }
2087
2088         }
2089
2090         /**
2091          * @brief Send a "poke"
2092          *
2093          * @param array $item the new item record
2094          * @param array $importer Record of the importer user mixed with contact of the content
2095          * @param int $posted_id The record number of item record that was just posted
2096          * @todo set proper type-hints (array?)
2097          */
2098         private static function do_poke($item, $importer, $posted_id) {
2099                 $verb = urldecode(substr($item["verb"],strpos($item["verb"], "#")+1));
2100                 if (!$verb) {
2101                         return;
2102                 }
2103                 $xo = parse_xml_string($item["object"],false);
2104
2105                 if (($xo->type == ACTIVITY_OBJ_PERSON) && ($xo->id)) {
2106
2107                         // somebody was poked/prodded. Was it me?
2108                         foreach ($xo->link as $l) {
2109                                 $atts = $l->attributes();
2110                                 switch ($atts["rel"]) {
2111                                         case "alternate":
2112                                                 $Blink = $atts["href"];
2113                                                 break;
2114                                         default:
2115                                                 break;
2116                                 }
2117                         }
2118
2119                         if ($Blink && link_compare($Blink, System::baseUrl() . "/profile/" . $importer["nickname"])) {
2120
2121                                 // send a notification
2122                                 notification(array(
2123                                         "type"         => NOTIFY_POKE,
2124                                         "notify_flags" => $importer["notify-flags"],
2125                                         "language"     => $importer["language"],
2126                                         "to_name"      => $importer["username"],
2127                                         "to_email"     => $importer["email"],
2128                                         "uid"          => $importer["importer_uid"],
2129                                         "item"         => $item,
2130                                         "link"         => System::baseUrl()."/display/".urlencode(get_item_guid($posted_id)),
2131                                         "source_name"  => stripslashes($item["author-name"]),
2132                                         "source_link"  => $item["author-link"],
2133                                         "source_photo" => ((link_compare($item["author-link"],$importer["url"]))
2134                                                 ? $importer["thumb"] : $item["author-avatar"]),
2135                                         "verb"         => $item["verb"],
2136                                         "otype"        => "person",
2137                                         "activity"     => $verb,
2138                                         "parent"       => $item["parent"]
2139                                 ));
2140                         }
2141                 }
2142         }
2143
2144         /**
2145          * @brief Processes several actions, depending on the verb
2146          *
2147          * @param int $entrytype Is it a toplevel entry, a comment or a relayed comment?
2148          * @param array $importer Record of the importer user mixed with contact of the content
2149          * @param array $item the new item record
2150          * @param bool $is_like Is the verb a "like"?
2151          *
2152          * @return bool Should the processing of the entries be continued?
2153          * @todo set proper type-hints (array?)
2154          */
2155         private static function process_verbs($entrytype, $importer, &$item, &$is_like) {
2156
2157                 logger("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, LOGGER_DEBUG);
2158
2159                 if (($entrytype == DFRN_TOP_LEVEL)) {
2160                         // The filling of the the "contact" variable is done for legcy reasons
2161                         // The functions below are partly used by ostatus.php as well - where we have this variable
2162                         $r = q("SELECT * FROM `contact` WHERE `id` = %d", intval($importer["id"]));
2163                         $contact = $r[0];
2164                         $nickname = $contact["nick"];
2165
2166                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
2167                         // This function once was responsible for DFRN and OStatus.
2168                         if (activity_match($item["verb"], ACTIVITY_FOLLOW)) {
2169                                 logger("New follower");
2170                                 new_follower($importer, $contact, $item, $nickname);
2171                                 return false;
2172                         }
2173                         if (activity_match($item["verb"], ACTIVITY_UNFOLLOW))  {
2174                                 logger("Lost follower");
2175                                 lose_follower($importer, $contact, $item);
2176                                 return false;
2177                         }
2178                         if (activity_match($item["verb"], ACTIVITY_REQ_FRIEND)) {
2179                                 logger("New friend request");
2180                                 new_follower($importer, $contact, $item, $nickname, true);
2181                                 return false;
2182                         }
2183                         if (activity_match($item["verb"], ACTIVITY_UNFRIEND))  {
2184                                 logger("Lost sharer");
2185                                 lose_sharer($importer, $contact, $item);
2186                                 return false;
2187                         }
2188                 } else {
2189                         if (($item["verb"] == ACTIVITY_LIKE)
2190                                 || ($item["verb"] == ACTIVITY_DISLIKE)
2191                                 || ($item["verb"] == ACTIVITY_ATTEND)
2192                                 || ($item["verb"] == ACTIVITY_ATTENDNO)
2193                                 || ($item["verb"] == ACTIVITY_ATTENDMAYBE)) {
2194                                 $is_like = true;
2195                                 $item["type"] = "activity";
2196                                 $item["gravity"] = GRAVITY_LIKE;
2197                                 // only one like or dislike per person
2198                                 // splitted into two queries for performance issues
2199                                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `parent-uri` = '%s' AND NOT `deleted` LIMIT 1",
2200                                         intval($item["uid"]),
2201                                         dbesc($item["author-link"]),
2202                                         dbesc($item["verb"]),
2203                                         dbesc($item["parent-uri"])
2204                                 );
2205                                 if (dbm::is_result($r)) {
2206                                         return false;
2207                                 }
2208
2209                                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `thr-parent` = '%s' AND NOT `deleted` LIMIT 1",
2210                                         intval($item["uid"]),
2211                                         dbesc($item["author-link"]),
2212                                         dbesc($item["verb"]),
2213                                         dbesc($item["parent-uri"])
2214                                 );
2215                                 if (dbm::is_result($r)) {
2216                                         return false;
2217                                 }
2218                         } else {
2219                                 $is_like = false;
2220                         }
2221
2222                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2223
2224                                 $xo = parse_xml_string($item["object"],false);
2225                                 $xt = parse_xml_string($item["target"],false);
2226
2227                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2228                                         $r = q("SELECT `id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2229                                                 dbesc($xt->id),
2230                                                 intval($importer["importer_uid"])
2231                                         );
2232
2233                                         if (!dbm::is_result($r)) {
2234                                                 logger("Query failed to execute, no result returned in " . __FUNCTION__);
2235                                                 return false;
2236                                         }
2237
2238                                         // extract tag, if not duplicate, add to parent item
2239                                         if ($xo->content) {
2240                                                 if (!(stristr($r[0]["tag"],trim($xo->content)))) {
2241                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2242                                                                 dbesc($r[0]["tag"] . (strlen($r[0]["tag"]) ? ',' : '') . '#[url=' . $xo->id . ']'. $xo->content . '[/url]'),
2243                                                                 intval($r[0]["id"])
2244                                                         );
2245                                                         create_tags_from_item($r[0]["id"]);
2246                                                 }
2247                                         }
2248                                 }
2249                         }
2250                 }
2251                 return true;
2252         }
2253
2254         /**
2255          * @brief Processes the link elements
2256          *
2257          * @param object $links link elements
2258          * @param array $item the item record
2259          * @todo set proper type-hints
2260          */
2261         private static function parse_links($links, &$item) {
2262                 $rel = "";
2263                 $href = "";
2264                 $type = "";
2265                 $length = "0";
2266                 $title = "";
2267                 foreach ($links AS $link) {
2268                         foreach ($link->attributes AS $attributes) {
2269                                 /// @TODO Rewrite these repeated (same) if () statements to a switch()
2270                                 if ($attributes->name == "href") {
2271                                         $href = $attributes->textContent;
2272                                 }
2273                                 if ($attributes->name == "rel") {
2274                                         $rel = $attributes->textContent;
2275                                 }
2276                                 if ($attributes->name == "type") {
2277                                         $type = $attributes->textContent;
2278                                 }
2279                                 if ($attributes->name == "length") {
2280                                         $length = $attributes->textContent;
2281                                 }
2282                                 if ($attributes->name == "title") {
2283                                         $title = $attributes->textContent;
2284                                 }
2285                         }
2286                         if (($rel != "") && ($href != "")) {
2287                                 switch ($rel) {
2288                                         case "alternate":
2289                                                 $item["plink"] = $href;
2290                                                 break;
2291                                         case "enclosure":
2292                                                 $enclosure = $href;
2293                                                 if (strlen($item["attach"])) {
2294                                                         $item["attach"] .= ",";
2295                                                 }
2296
2297                                                 $item["attach"] .= '[attach]href="' . $href . '" length="' . $length . '" type="' . $type . '" title="' . $title . '"[/attach]';
2298                                                 break;
2299                                 }
2300                         }
2301                 }
2302         }
2303
2304         /**
2305          * @brief Processes the entry elements which contain the items and comments
2306          *
2307          * @param array $header Array of the header elements that always stay the same
2308          * @param object $xpath XPath object
2309          * @param object $entry entry elements
2310          * @param array $importer Record of the importer user mixed with contact of the content
2311          * @todo Add type-hints
2312          */
2313         private static function process_entry($header, $xpath, $entry, $importer, $xml) {
2314
2315                 logger("Processing entries");
2316
2317                 $item = $header;
2318
2319                 $item["protocol"] = PROTOCOL_DFRN;
2320
2321                 $item["source"] = $xml;
2322
2323                 // Get the uri
2324                 $item["uri"] = $xpath->query("atom:id/text()", $entry)->item(0)->nodeValue;
2325
2326                 $item["edited"] = $xpath->query("atom:updated/text()", $entry)->item(0)->nodeValue;
2327
2328                 $current = q("SELECT `id`, `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2329                         dbesc($item["uri"]),
2330                         intval($importer["importer_uid"])
2331                 );
2332
2333                 // Is there an existing item?
2334                 if (dbm::is_result($current) && edited_timestamp_is_newer($current[0], $item) &&
2335                         (datetime_convert("UTC","UTC",$item["edited"]) < $current[0]["edited"])) {
2336                         logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2337                         return;
2338                 }
2339
2340                 // Fetch the owner
2341                 $owner = self::fetchauthor($xpath, $entry, $importer, "dfrn:owner", true);
2342
2343                 $item["owner-name"] = $owner["name"];
2344                 $item["owner-link"] = $owner["link"];
2345                 $item["owner-avatar"] = $owner["avatar"];
2346
2347                 // fetch the author
2348                 $author = self::fetchauthor($xpath, $entry, $importer, "atom:author", true);
2349
2350                 $item["author-name"] = $author["name"];
2351                 $item["author-link"] = $author["link"];
2352                 $item["author-avatar"] = $author["avatar"];
2353
2354                 $item["title"] = $xpath->query("atom:title/text()", $entry)->item(0)->nodeValue;
2355
2356                 $item["created"] = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2357
2358                 $item["body"] = $xpath->query("dfrn:env/text()", $entry)->item(0)->nodeValue;
2359                 $item["body"] = str_replace(array(' ',"\t","\r","\n"), array('','','',''),$item["body"]);
2360                 // make sure nobody is trying to sneak some html tags by us
2361                 $item["body"] = notags(base64url_decode($item["body"]));
2362
2363                 $item["body"] = limit_body_size($item["body"]);
2364
2365                 /// @todo Do we really need this check for HTML elements? (It was copied from the old function)
2366                 if ((strpos($item['body'],'<') !== false) && (strpos($item['body'],'>') !== false)) {
2367
2368                         $item['body'] = reltoabs($item['body'],$base_url);
2369
2370                         $item['body'] = html2bb_video($item['body']);
2371
2372                         $item['body'] = oembed_html2bbcode($item['body']);
2373
2374                         $config = HTMLPurifier_Config::createDefault();
2375                         $config->set('Cache.DefinitionImpl', null);
2376
2377                         // we shouldn't need a whitelist, because the bbcode converter
2378                         // will strip out any unsupported tags.
2379
2380                         $purifier = new HTMLPurifier($config);
2381                         $item['body'] = $purifier->purify($item['body']);
2382
2383                         $item['body'] = @html2bbcode($item['body']);
2384                 }
2385
2386                 /// @todo We should check for a repeated post and if we know the repeated author.
2387
2388                 // We don't need the content element since "dfrn:env" is always present
2389                 //$item["body"] = $xpath->query("atom:content/text()", $entry)->item(0)->nodeValue;
2390
2391                 $item["last-child"] = $xpath->query("dfrn:comment-allow/text()", $entry)->item(0)->nodeValue;
2392                 $item["location"] = $xpath->query("dfrn:location/text()", $entry)->item(0)->nodeValue;
2393
2394                 $georsspoint = $xpath->query("georss:point", $entry);
2395                 if ($georsspoint) {
2396                         $item["coord"] = $georsspoint->item(0)->nodeValue;
2397                 }
2398
2399                 $item["private"] = $xpath->query("dfrn:private/text()", $entry)->item(0)->nodeValue;
2400
2401                 $item["extid"] = $xpath->query("dfrn:extid/text()", $entry)->item(0)->nodeValue;
2402
2403                 if ($xpath->query("dfrn:bookmark/text()", $entry)->item(0)->nodeValue == "true") {
2404                         $item["bookmark"] = true;
2405                 }
2406
2407                 $notice_info = $xpath->query("statusnet:notice_info", $entry);
2408                 if ($notice_info && ($notice_info->length > 0)) {
2409                         foreach ($notice_info->item(0)->attributes AS $attributes) {
2410                                 if ($attributes->name == "source") {
2411                                         $item["app"] = strip_tags($attributes->textContent);
2412                                 }
2413                         }
2414                 }
2415
2416                 $item["guid"] = $xpath->query("dfrn:diaspora_guid/text()", $entry)->item(0)->nodeValue;
2417
2418                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "item_store"
2419                 $dsprsig = unxmlify($xpath->query("dfrn:diaspora_signature/text()", $entry)->item(0)->nodeValue);
2420                 if ($dsprsig != "") {
2421                         $item["dsprsig"] = $dsprsig;
2422                 }
2423
2424                 $item["verb"] = $xpath->query("activity:verb/text()", $entry)->item(0)->nodeValue;
2425
2426                 if ($xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue != "") {
2427                         $item["object-type"] = $xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue;
2428                 }
2429
2430                 $object = $xpath->query("activity:object", $entry)->item(0);
2431                 $item["object"] = self::transform_activity($xpath, $object, "object");
2432
2433                 if (trim($item["object"]) != "") {
2434                         $r = parse_xml_string($item["object"], false);
2435                         if (isset($r->type)) {
2436                                 $item["object-type"] = $r->type;
2437                         }
2438                 }
2439
2440                 $target = $xpath->query("activity:target", $entry)->item(0);
2441                 $item["target"] = self::transform_activity($xpath, $target, "target");
2442
2443                 $categories = $xpath->query("atom:category", $entry);
2444                 if ($categories) {
2445                         foreach ($categories AS $category) {
2446                                 $term = "";
2447                                 $scheme = "";
2448                                 foreach ($category->attributes AS $attributes) {
2449                                         if ($attributes->name == "term") {
2450                                                 $term = $attributes->textContent;
2451                                         }
2452
2453                                         if ($attributes->name == "scheme") {
2454                                                 $scheme = $attributes->textContent;
2455                                         }
2456                                 }
2457
2458                                 if (($term != "") && ($scheme != "")) {
2459                                         $parts = explode(":", $scheme);
2460                                         if ((count($parts) >= 4) && (array_shift($parts) == "X-DFRN")) {
2461                                                 $termhash = array_shift($parts);
2462                                                 $termurl = implode(":", $parts);
2463
2464                                                 if (strlen($item["tag"])) {
2465                                                         $item["tag"] .= ",";
2466                                                 }
2467
2468                                                 $item["tag"] .= $termhash . "[url=" . $termurl . "]" . $term . "[/url]";
2469                                         }
2470                                 }
2471                         }
2472                 }
2473
2474                 $enclosure = "";
2475
2476                 $links = $xpath->query("atom:link", $entry);
2477                 if ($links) {
2478                         self::parse_links($links, $item);
2479                 }
2480
2481                 $item['conversation-uri'] = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
2482
2483                 $conv = $xpath->query('ostatus:conversation', $entry);
2484                 if (is_object($conv->item(0))) {
2485                         foreach ($conv->item(0)->attributes AS $attributes) {
2486                                 if ($attributes->name == "ref") {
2487                                         $item['conversation-uri'] = $attributes->textContent;
2488                                 }
2489                                 if ($attributes->name == "href") {
2490                                         $item['conversation-href'] = $attributes->textContent;
2491                                 }
2492                         }
2493                 }
2494
2495                 // Is it a reply or a top level posting?
2496                 $item["parent-uri"] = $item["uri"];
2497
2498                 $inreplyto = $xpath->query("thr:in-reply-to", $entry);
2499                 if (is_object($inreplyto->item(0))) {
2500                         foreach ($inreplyto->item(0)->attributes AS $attributes) {
2501                                 if ($attributes->name == "ref") {
2502                                         $item["parent-uri"] = $attributes->textContent;
2503                                 }
2504                         }
2505                 }
2506
2507                 // Get the type of the item (Top level post, reply or remote reply)
2508                 $entrytype = self::get_entry_type($importer, $item);
2509
2510                 // Now assign the rest of the values that depend on the type of the message
2511                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2512                         if (!isset($item["object-type"])) {
2513                                 $item["object-type"] = ACTIVITY_OBJ_COMMENT;
2514                         }
2515
2516                         if ($item["contact-id"] != $owner["contact-id"]) {
2517                                 $item["contact-id"] = $owner["contact-id"];
2518                         }
2519
2520                         if (($item["network"] != $owner["network"]) && ($owner["network"] != "")) {
2521                                 $item["network"] = $owner["network"];
2522                         }
2523
2524                         if ($item["contact-id"] != $author["contact-id"]) {
2525                                 $item["contact-id"] = $author["contact-id"];
2526                         }
2527
2528                         if (($item["network"] != $author["network"]) && ($author["network"] != "")) {
2529                                 $item["network"] = $author["network"];
2530                         }
2531
2532                         /// @TODO maybe remove this old-lost code then?
2533                         // This code was taken from the old DFRN code
2534                         // When activated, forums don't work.
2535                         // And: Why should we disallow commenting by followers?
2536                         // the behaviour is now similar to the Diaspora part.
2537                         //if ($importer["rel"] == CONTACT_IS_FOLLOWER) {
2538                         //      logger("Contact ".$importer["id"]." is only follower. Quitting", LOGGER_DEBUG);
2539                         //      return;
2540                         //}
2541                 }
2542
2543                 if ($entrytype == DFRN_REPLY_RC) {
2544                         $item["type"] = "remote-comment";
2545                         $item["wall"] = 1;
2546                 } elseif ($entrytype == DFRN_TOP_LEVEL) {
2547                         if (!isset($item["object-type"])) {
2548                                 $item["object-type"] = ACTIVITY_OBJ_NOTE;
2549                         }
2550
2551                         // Is it an event?
2552                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2553                                 logger("Item ".$item["uri"]." seems to contain an event.", LOGGER_DEBUG);
2554                                 $ev = bbtoevent($item["body"]);
2555                                 if ((x($ev, "desc") || x($ev, "summary")) && x($ev, "start")) {
2556                                         logger("Event in item ".$item["uri"]." was found.", LOGGER_DEBUG);
2557                                         /// @TODO Mixure of "/' ahead ...
2558                                         $ev["cid"] = $importer["id"];
2559                                         $ev["uid"] = $importer["uid"];
2560                                         $ev["uri"] = $item["uri"];
2561                                         $ev["edited"] = $item["edited"];
2562                                         $ev['private'] = $item['private'];
2563                                         $ev["guid"] = $item["guid"];
2564
2565                                         $r = q("SELECT `id` FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2566                                                 dbesc($item["uri"]),
2567                                                 intval($importer["uid"])
2568                                         );
2569                                         if (dbm::is_result($r)) {
2570                                                 $ev["id"] = $r[0]["id"];
2571                                         }
2572
2573                                         $event_id = event_store($ev);
2574                                         logger("Event ".$event_id." was stored", LOGGER_DEBUG);
2575                                         return;
2576                                 }
2577                         }
2578                 }
2579
2580                 if (!self::process_verbs($entrytype, $importer, $item, $is_like)) {
2581                         logger("Exiting because 'process_verbs' told us so", LOGGER_DEBUG);
2582                         return;
2583                 }
2584
2585                 // Update content if 'updated' changes
2586                 if (dbm::is_result($current)) {
2587                         if (self::update_content($r[0], $item, $importer, $entrytype)) {
2588                                 logger("Item ".$item["uri"]." was updated.", LOGGER_DEBUG);
2589                         } else {
2590                                 logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2591                         }
2592                         return;
2593                 }
2594
2595                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2596                         $posted_id = item_store($item);
2597                         $parent = 0;
2598
2599                         if ($posted_id) {
2600
2601                                 logger("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, LOGGER_DEBUG);
2602
2603                                 $item["id"] = $posted_id;
2604
2605                                 $r = q("SELECT `parent`, `parent-uri` FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
2606                                         intval($posted_id),
2607                                         intval($importer["importer_uid"])
2608                                 );
2609                                 if (dbm::is_result($r)) {
2610                                         $parent = $r[0]["parent"];
2611                                         $parent_uri = $r[0]["parent-uri"];
2612                                 }
2613
2614                                 if (!$is_like) {
2615                                         $r1 = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `uid` = %d AND `parent` = %d",
2616                                                 dbesc(datetime_convert()),
2617                                                 intval($importer["importer_uid"]),
2618                                                 intval($r[0]["parent"])
2619                                         );
2620
2621                                         $r2 = q("UPDATE `item` SET `last-child` = 1, `changed` = '%s' WHERE `uid` = %d AND `id` = %d",
2622                                                 dbesc(datetime_convert()),
2623                                                 intval($importer["importer_uid"]),
2624                                                 intval($posted_id)
2625                                         );
2626                                 }
2627
2628                                 if ($posted_id && $parent && ($entrytype == DFRN_REPLY_RC)) {
2629                                         logger("Notifying followers about comment ".$posted_id, LOGGER_DEBUG);
2630                                         proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $posted_id);
2631                                 }
2632
2633                                 return true;
2634                         }
2635                 } else { // $entrytype == DFRN_TOP_LEVEL
2636                         if (!link_compare($item["owner-link"],$importer["url"])) {
2637                                 /*
2638                                  * The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery,
2639                                  * but otherwise there's a possible data mixup on the sender's system.
2640                                  * the tgroup delivery code called from item_store will correct it if it's a forum,
2641                                  * but we're going to unconditionally correct it here so that the post will always be owned by our contact.
2642                                  */
2643                                 logger('Correcting item owner.', LOGGER_DEBUG);
2644                                 $item["owner-name"]   = $importer["senderName"];
2645                                 $item["owner-link"]   = $importer["url"];
2646                                 $item["owner-avatar"] = $importer["thumb"];
2647                         }
2648
2649                         if (($importer["rel"] == CONTACT_IS_FOLLOWER) && (!tgroup_check($importer["importer_uid"], $item))) {
2650                                 logger("Contact ".$importer["id"]." is only follower and tgroup check was negative.", LOGGER_DEBUG);
2651                                 return;
2652                         }
2653
2654                         // This is my contact on another system, but it's really me.
2655                         // Turn this into a wall post.
2656                         $notify = item_is_remote_self($importer, $item);
2657
2658                         $posted_id = item_store($item, false, $notify);
2659
2660                         logger("Item was stored with id ".$posted_id, LOGGER_DEBUG);
2661
2662                         if (stristr($item["verb"],ACTIVITY_POKE))
2663                                 self::do_poke($item, $importer, $posted_id);
2664                 }
2665         }
2666
2667         /**
2668          * @brief Deletes items
2669          *
2670          * @param object $xpath XPath object
2671          * @param object $deletion deletion elements
2672          * @param array $importer Record of the importer user mixed with contact of the content
2673          * @todo set proper type-hints
2674          */
2675         private static function process_deletion($xpath, $deletion, $importer) {
2676
2677                 logger("Processing deletions");
2678
2679                 foreach ($deletion->attributes AS $attributes) {
2680                         if ($attributes->name == "ref") {
2681                                 $uri = $attributes->textContent;
2682                         }
2683                         if ($attributes->name == "when") {
2684                                 $when = $attributes->textContent;
2685                         }
2686                 }
2687                 if ($when) {
2688                         $when = datetime_convert("UTC", "UTC", $when, "Y-m-d H:i:s");
2689                 } else {
2690                         $when = datetime_convert("UTC", "UTC", "now", "Y-m-d H:i:s");
2691                 }
2692
2693                 if (!$uri || !$importer["id"]) {
2694                         return false;
2695                 }
2696
2697                 /// @todo Only select the used fields
2698                 $r = q("SELECT `item`.*, `contact`.`self` FROM `item` INNER JOIN `contact` on `item`.`contact-id` = `contact`.`id`
2699                                 WHERE `uri` = '%s' AND `item`.`uid` = %d AND `contact-id` = %d AND NOT `item`.`file` LIKE '%%[%%' LIMIT 1",
2700                                 dbesc($uri),
2701                                 intval($importer["uid"]),
2702                                 intval($importer["id"])
2703                         );
2704                 if (!dbm::is_result($r)) {
2705                         logger("Item with uri " . $uri . " from contact " . $importer["id"] . " for user " . $importer["uid"] . " wasn't found.", LOGGER_DEBUG);
2706                         return;
2707                 } else {
2708
2709                         $item = $r[0];
2710
2711                         $entrytype = self::get_entry_type($importer, $item);
2712
2713                         if (!$item["deleted"]) {
2714                                 logger('deleting item '.$item["id"].' uri='.$uri, LOGGER_DEBUG);
2715                         } else {
2716                                 return;
2717                         }
2718
2719                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2720                                 logger("Deleting event ".$item["event-id"], LOGGER_DEBUG);
2721                                 event_delete($item["event-id"]);
2722                         }
2723
2724                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2725
2726                                 $xo = parse_xml_string($item["object"],false);
2727                                 $xt = parse_xml_string($item["target"],false);
2728
2729                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2730                                         $i = q("SELECT `id`, `contact-id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2731                                                 dbesc($xt->id),
2732                                                 intval($importer["importer_uid"])
2733                                         );
2734                                         if (dbm::is_result($i)) {
2735
2736                                                 // For tags, the owner cannot remove the tag on the author's copy of the post.
2737
2738                                                 $owner_remove = (($item["contact-id"] == $i[0]["contact-id"]) ? true: false);
2739                                                 $author_remove = (($item["origin"] && $item["self"]) ? true : false);
2740                                                 $author_copy = (($item["origin"]) ? true : false);
2741
2742                                                 if ($owner_remove && $author_copy) {
2743                                                         return;
2744                                                 }
2745                                                 if ($author_remove || $owner_remove) {
2746                                                         $tags = explode(',',$i[0]["tag"]);
2747                                                         $newtags = array();
2748                                                         if (count($tags)) {
2749                                                                 foreach ($tags as $tag) {
2750                                                                         if (trim($tag) !== trim($xo->body)) {
2751                                                                                 $newtags[] = trim($tag);
2752                                                                         }
2753                                                                 }
2754                                                         }
2755                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2756                                                                 dbesc(implode(',', $newtags)),
2757                                                                 intval($i[0]["id"])
2758                                                         );
2759                                                         create_tags_from_item($i[0]["id"]);
2760                                                 }
2761                                         }
2762                                 }
2763                         }
2764
2765                         if ($entrytype == DFRN_TOP_LEVEL) {
2766                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2767                                                 `body` = '', `title` = ''
2768                                         WHERE `parent-uri` = '%s' AND `uid` IN (0, %d)",
2769                                                 dbesc($when),
2770                                                 dbesc(datetime_convert()),
2771                                                 dbesc($uri),
2772                                                 intval($importer["uid"])
2773                                         );
2774                                 create_tags_from_itemuri($uri, $importer["uid"]);
2775                                 create_files_from_itemuri($uri, $importer["uid"]);
2776                                 update_thread_uri($uri, $importer["uid"]);
2777                         } else {
2778                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2779                                                 `body` = '', `title` = ''
2780                                         WHERE `uri` = '%s' AND `uid` IN (0, %d)",
2781                                                 dbesc($when),
2782                                                 dbesc(datetime_convert()),
2783                                                 dbesc($uri),
2784                                                 intval($importer["uid"])
2785                                         );
2786                                 create_tags_from_itemuri($uri, $importer["uid"]);
2787                                 create_files_from_itemuri($uri, $importer["uid"]);
2788                                 update_thread_uri($uri, $importer["importer_uid"]);
2789                                 if ($item["last-child"]) {
2790                                         // ensure that last-child is set in case the comment that had it just got wiped.
2791                                         q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` IN (0, %d)",
2792                                                 dbesc(datetime_convert()),
2793                                                 dbesc($item["parent-uri"]),
2794                                                 intval($item["uid"])
2795                                         );
2796                                         // who is the last child now?
2797                                         $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `moderated` = 0 AND `uid` = %d
2798                                                 ORDER BY `created` DESC LIMIT 1",
2799                                                         dbesc($item["parent-uri"]),
2800                                                         intval($importer["uid"])
2801                                         );
2802                                         if (dbm::is_result($r)) {
2803                                                 q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d",
2804                                                         intval($r[0]["id"])
2805                                                 );
2806                                         }
2807                                 }
2808                                 // if this is a relayed delete, propagate it to other recipients
2809
2810                                 if ($entrytype == DFRN_REPLY_RC) {
2811                                         logger("Notifying followers about deletion of post " . $item["id"], LOGGER_DEBUG);
2812                                         proc_run(PRIORITY_HIGH, "include/notifier.php","drop", $item["id"]);
2813                                 }
2814                         }
2815                 }
2816         }
2817
2818         /**
2819          * @brief Imports a DFRN message
2820          *
2821          * @param text $xml The DFRN message
2822          * @param array $importer Record of the importer user mixed with contact of the content
2823          * @param bool $sort_by_date Is used when feeds are polled
2824          * @return integer Import status
2825          * @todo set proper type-hints
2826          */
2827         public static function import($xml, $importer, $sort_by_date = false) {
2828
2829                 if ($xml == "") {
2830                         return 400;
2831                 }
2832
2833                 if ($importer["readonly"]) {
2834                         // We aren't receiving stuff from this person. But we will quietly ignore them
2835                         // rather than a blatant "go away" message.
2836                         logger('ignoring contact '.$importer["id"]);
2837                         return 403;
2838                 }
2839
2840                 $doc = new DOMDocument();
2841                 @$doc->loadXML($xml);
2842
2843                 $xpath = new DomXPath($doc);
2844                 $xpath->registerNamespace("atom", NAMESPACE_ATOM1);
2845                 $xpath->registerNamespace("thr", NAMESPACE_THREAD);
2846                 $xpath->registerNamespace("at", NAMESPACE_TOMB);
2847                 $xpath->registerNamespace("media", NAMESPACE_MEDIA);
2848                 $xpath->registerNamespace("dfrn", NAMESPACE_DFRN);
2849                 $xpath->registerNamespace("activity", NAMESPACE_ACTIVITY);
2850                 $xpath->registerNamespace("georss", NAMESPACE_GEORSS);
2851                 $xpath->registerNamespace("poco", NAMESPACE_POCO);
2852                 $xpath->registerNamespace("ostatus", NAMESPACE_OSTATUS);
2853                 $xpath->registerNamespace("statusnet", NAMESPACE_STATUSNET);
2854
2855                 $header = array();
2856                 $header["uid"] = $importer["uid"];
2857                 $header["network"] = NETWORK_DFRN;
2858                 $header["type"] = "remote";
2859                 $header["wall"] = 0;
2860                 $header["origin"] = 0;
2861                 $header["contact-id"] = $importer["id"];
2862
2863                 // Update the contact table if the data has changed
2864
2865                 // The "atom:author" is only present in feeds
2866                 if ($xpath->query("/atom:feed/atom:author")->length > 0) {
2867                         self::fetchauthor($xpath, $doc->firstChild, $importer, "atom:author", false, $xml);
2868                 }
2869
2870                 // Only the "dfrn:owner" in the head section contains all data
2871                 if ($xpath->query("/atom:feed/dfrn:owner")->length > 0) {
2872                         self::fetchauthor($xpath, $doc->firstChild, $importer, "dfrn:owner", false, $xml);
2873                 }
2874
2875                 logger("Import DFRN message for user " . $importer["uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
2876
2877                 // The account type is new since 3.5.1
2878                 if ($xpath->query("/atom:feed/dfrn:account_type")->length > 0) {
2879                         $accounttype = intval($xpath->evaluate("/atom:feed/dfrn:account_type/text()", $context)->item(0)->nodeValue);
2880
2881                         if ($accounttype != $importer["contact-type"]) {
2882                                 /// @TODO this way is the norm or putting ); at the end of the line?
2883                                 q("UPDATE `contact` SET `contact-type` = %d WHERE `id` = %d",
2884                                         intval($accounttype),
2885                                         intval($importer["id"])
2886                                 );
2887                         }
2888                 }
2889
2890                 // is it a public forum? Private forums aren't supported with this method
2891                 // This is deprecated since 3.5.1
2892                 $forum = intval($xpath->evaluate("/atom:feed/dfrn:community/text()", $context)->item(0)->nodeValue);
2893
2894                 if ($forum != $importer["forum"]) {
2895                         q("UPDATE `contact` SET `forum` = %d WHERE `forum` != %d AND `id` = %d",
2896                                 intval($forum), intval($forum),
2897                                 intval($importer["id"])
2898                         );
2899                 }
2900
2901                 $mails = $xpath->query("/atom:feed/dfrn:mail");
2902                 foreach ($mails AS $mail) {
2903                         self::process_mail($xpath, $mail, $importer);
2904                 }
2905
2906                 $suggestions = $xpath->query("/atom:feed/dfrn:suggest");
2907                 foreach ($suggestions AS $suggestion) {
2908                         self::process_suggestion($xpath, $suggestion, $importer);
2909                 }
2910
2911                 $relocations = $xpath->query("/atom:feed/dfrn:relocate");
2912                 foreach ($relocations AS $relocation) {
2913                         self::process_relocation($xpath, $relocation, $importer);
2914                 }
2915
2916                 $deletions = $xpath->query("/atom:feed/at:deleted-entry");
2917                 foreach ($deletions AS $deletion) {
2918                         self::process_deletion($xpath, $deletion, $importer);
2919                 }
2920
2921                 if (!$sort_by_date) {
2922                         $entries = $xpath->query("/atom:feed/atom:entry");
2923                         foreach ($entries AS $entry) {
2924                                 self::process_entry($header, $xpath, $entry, $importer, $xml);
2925                         }
2926                 } else {
2927                         $newentries = array();
2928                         $entries = $xpath->query("/atom:feed/atom:entry");
2929                         foreach ($entries AS $entry) {
2930                                 $created = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2931                                 $newentries[strtotime($created)] = $entry;
2932                         }
2933
2934                         // Now sort after the publishing date
2935                         ksort($newentries);
2936
2937                         foreach ($newentries AS $entry) {
2938                                 self::process_entry($header, $xpath, $entry, $importer, $xml);
2939                         }
2940                 }
2941                 logger("Import done for user " . $importer["uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
2942                 return 200;
2943         }
2944 }