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 require_once("include/Contact.php");
  11 require_once("include/ostatus.php");
  12 require_once("include/enotify.php");
  13 require_once("include/threads.php");
  14 require_once("include/socgraph.php");
  15 require_once("include/items.php");
  16 require_once("include/tags.php");
  17 require_once("include/files.php");
  18 require_once("include/event.php");
  19 require_once("include/text.php");
  20 require_once("include/oembed.php");
  21 require_once("include/html2bbcode.php");
  22 require_once("include/bbcode.php");
  23 require_once("include/xml.php");
  24
  25 /**
  26  * @brief This class contain functions to create and send DFRN XML files
  27  *
  28  */
  29 class dfrn {
  30
  31         const DFRN_TOP_LEVEL = 0;       // Top level posting
  32         const DFRN_REPLY = 1;           // Regular reply that is stored locally
  33         const DFRN_REPLY_RC = 2;        // Reply that will be relayed
  34
  35         /**
  36          * @brief Generates the atom entries for delivery.php
  37          *
  38          * This function is used whenever content is transmitted via DFRN.
  39          *
  40          * @param array $items Item elements
  41          * @param array $owner Owner record
  42          *
  43          * @return string DFRN entries
  44          * @todo Add type-hints
  45          */
  46         public static function entries($items,$owner) {
  47
  48                 $doc = new DOMDocument('1.0', 'utf-8');
  49                 $doc->formatOutput = true;
  50
  51                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
  52
  53                 if (! count($items)) {
  54                         return trim($doc->saveXML());
  55                 }
  56
  57                 foreach ($items as $item) {
  58                         $entry = self::entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
  59                         $root->appendChild($entry);
  60                 }
  61
  62                 return(trim($doc->saveXML()));
  63         }
  64
  65         /**
  66          * @brief Generate an atom feed for the given user
  67          *
  68          * This function is called when another server is pulling data from the user feed.
  69          *
  70          * @param string $dfrn_id DFRN ID from the requesting party
  71          * @param string $owner_nick Owner nick name
  72          * @param string $last_update Date of the last update
  73          * @param int $direction Can be -1, 0 or 1.
  74          * @param boolean $onlyheader Output only the header without content? (Default is "no")
  75          *
  76          * @return string DFRN feed entries
  77          */
  78         public static function feed($dfrn_id, $owner_nick, $last_update, $direction = 0, $onlyheader = false) {
  79
  80                 $a = get_app();
  81
  82                 $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
  83                 $public_feed = (($dfrn_id) ? false : true);
  84                 $starred     = false;   // not yet implemented, possible security issues
  85                 $converse    = false;
  86
  87                 if ($public_feed && $a->argc > 2) {
  88                         for ($x = 2; $x < $a->argc; $x++) {
  89                                 if ($a->argv[$x] == 'converse') {
  90                                         $converse = true;
  91                                 }
  92                                 if ($a->argv[$x] == 'starred') {
  93                                         $starred = true;
  94                                 }
  95                                 if ($a->argv[$x] == 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1])) {
  96                                         $category = $a->argv[$x+1];
  97                                 }
  98                         }
  99                 }
 100
 101
 102
 103                 // default permissions - anonymous user
 104
 105                 $sql_extra = " AND `item`.`allow_cid` = '' AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = '' ";
 106
 107                 $r = q("SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 108                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 109                         WHERE `contact`.`self` AND `user`.`nickname` = '%s' LIMIT 1",
 110                         dbesc($owner_nick)
 111                 );
 112
 113                 if (! dbm::is_result($r)) {
 114                         killme();
 115                 }
 116
 117                 $owner = $r[0];
 118                 $owner_id = $owner['uid'];
 119                 $owner_nick = $owner['nickname'];
 120
 121                 $sql_post_table = "";
 122
 123                 if (! $public_feed) {
 124
 125                         $sql_extra = '';
 126                         switch($direction) {
 127                                 case (-1):
 128                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 129                                         $my_id = $dfrn_id;
 130                                         break;
 131                                 case 0:
 132                                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 133                                         $my_id = '1:' . $dfrn_id;
 134                                         break;
 135                                 case 1:
 136                                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 137                                         $my_id = '0:' . $dfrn_id;
 138                                         break;
 139                                 default:
 140                                         return false;
 141                                         break; // NOTREACHED
 142                         }
 143
 144                         $r = q("SELECT * FROM `contact` WHERE NOT `blocked` AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 145                                 intval($owner_id)
 146                         );
 147
 148                         if (! dbm::is_result($r)) {
 149                                 killme();
 150                         }
 151
 152                         $contact = $r[0];
 153                         require_once('include/security.php');
 154                         $groups = init_groups_visitor($contact['id']);
 155
 156                         if (count($groups)) {
 157                                 for ($x = 0; $x < count($groups); $x ++)
 158                                         $groups[$x] = '<' . intval($groups[$x]) . '>' ;
 159                                 $gs = implode('|', $groups);
 160                         } else {
 161                                 $gs = '<<>>' ; // Impossible to match
 162                         }
 163
 164                         $sql_extra = sprintf("
 165                                 AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
 166                                 AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
 167                                 AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
 168                                 AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
 169                         ",
 170                                 intval($contact['id']),
 171                                 intval($contact['id']),
 172                                 dbesc($gs),
 173                                 dbesc($gs)
 174                         );
 175                 }
 176
 177                 if ($public_feed) {
 178                         $sort = 'DESC';
 179                 } else {
 180                         $sort = 'ASC';
 181                 }
 182
 183                 if (! strlen($last_update)) {
 184                         $last_update = 'now -30 days';
 185                 }
 186
 187                 if (isset($category)) {
 188                         $sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 189                                         dbesc(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($owner_id));
 190                         //$sql_extra .= file_tag_file_query('item',$category,'category');
 191                 }
 192
 193                 if ($public_feed) {
 194                         if (! $converse) {
 195                                 $sql_extra .= " AND `contact`.`self` = 1 ";
 196                         }
 197                 }
 198
 199                 $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
 200
 201                 $r = q("SELECT `item`.*, `item`.`id` AS `item_id`,
 202                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 203                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 204                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 205                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 206                         FROM `item` USE INDEX (`uid_wall_changed`) $sql_post_table
 207                         STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 208                         AND (NOT `contact`.`blocked` OR `contact`.`pending`)
 209                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 210                         WHERE `item`.`uid` = %d AND `item`.`visible` AND NOT `item`.`moderated` AND `item`.`parent` != 0
 211                         AND `item`.`wall` AND `item`.`changed` > '%s'
 212                         $sql_extra
 213                         ORDER BY `item`.`parent` ".$sort.", `item`.`created` ASC LIMIT 0, 300",
 214                         intval($owner_id),
 215                         dbesc($check_date),
 216                         dbesc($sort)
 217                 );
 218
 219                 if (!dbm::is_result($r)) {
 220                         logger("Query failed to execute, no result returned in " . __FUNCTION__);
 221                         killme();
 222                 }
 223
 224                 // Will check further below if this actually returned results.
 225                 // We will provide an empty feed if that is the case.
 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                 // This hook can't work anymore
 247                 //      call_hooks('atom_feed', $atom);
 248
 249                 if (!count($items) OR $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 Create XML text for DFRN mails
 290          *
 291          * @param array $item message elements
 292          * @param array $owner Owner record
 293          *
 294          * @return string DFRN mail
 295          * @todo Add type-hints
 296          */
 297         public static function mail($item, $owner) {
 298                 $doc = new DOMDocument('1.0', 'utf-8');
 299                 $doc->formatOutput = true;
 300
 301                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 302
 303                 $mail = $doc->createElement("dfrn:mail");
 304                 $sender = $doc->createElement("dfrn:sender");
 305
 306                 xml::add_element($doc, $sender, "dfrn:name", $owner['name']);
 307                 xml::add_element($doc, $sender, "dfrn:uri", $owner['url']);
 308                 xml::add_element($doc, $sender, "dfrn:avatar", $owner['thumb']);
 309
 310                 $mail->appendChild($sender);
 311
 312                 xml::add_element($doc, $mail, "dfrn:id", $item['uri']);
 313                 xml::add_element($doc, $mail, "dfrn:in-reply-to", $item['parent-uri']);
 314                 xml::add_element($doc, $mail, "dfrn:sentdate", datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME));
 315                 xml::add_element($doc, $mail, "dfrn:subject", $item['title']);
 316                 xml::add_element($doc, $mail, "dfrn:content", $item['body']);
 317
 318                 $root->appendChild($mail);
 319
 320                 return(trim($doc->saveXML()));
 321         }
 322
 323         /**
 324          * @brief Create XML text for DFRN friend suggestions
 325          *
 326          * @param array $item suggestion elements
 327          * @param array $owner Owner record
 328          *
 329          * @return string DFRN suggestions
 330          * @todo Add type-hints
 331          */
 332         public static function fsuggest($item, $owner) {
 333                 $doc = new DOMDocument('1.0', 'utf-8');
 334                 $doc->formatOutput = true;
 335
 336                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 337
 338                 $suggest = $doc->createElement("dfrn:suggest");
 339
 340                 xml::add_element($doc, $suggest, "dfrn:url", $item['url']);
 341                 xml::add_element($doc, $suggest, "dfrn:name", $item['name']);
 342                 xml::add_element($doc, $suggest, "dfrn:photo", $item['photo']);
 343                 xml::add_element($doc, $suggest, "dfrn:request", $item['request']);
 344                 xml::add_element($doc, $suggest, "dfrn:note", $item['note']);
 345
 346                 $root->appendChild($suggest);
 347
 348                 return(trim($doc->saveXML()));
 349         }
 350
 351         /**
 352          * @brief Create XML text for DFRN relocations
 353          *
 354          * @param array $owner Owner record
 355          * @param int $uid User ID
 356          *
 357          * @return string DFRN relocations
 358          * @todo Add type-hints
 359          */
 360         public static function relocate($owner, $uid) {
 361
 362                 /* get site pubkey. this could be a new installation with no site keys*/
 363                 $pubkey = get_config('system','site_pubkey');
 364                 if (! $pubkey) {
 365                         $res = new_keypair(1024);
 366                         set_config('system','site_prvkey', $res['prvkey']);
 367                         set_config('system','site_pubkey', $res['pubkey']);
 368                 }
 369
 370                 $rp = q("SELECT `resource-id` , `scale`, type FROM `photo`
 371                                 WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;", $uid);
 372                 $photos = array();
 373                 $ext = Photo::supportedTypes();
 374
 375                 foreach ($rp as $p) {
 376                         $photos[$p['scale']] = app::get_baseurl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 377                 }
 378
 379                 unset($rp, $ext);
 380
 381                 $doc = new DOMDocument('1.0', 'utf-8');
 382                 $doc->formatOutput = true;
 383
 384                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 385
 386                 $relocate = $doc->createElement("dfrn:relocate");
 387
 388                 xml::add_element($doc, $relocate, "dfrn:url", $owner['url']);
 389                 xml::add_element($doc, $relocate, "dfrn:name", $owner['name']);
 390                 xml::add_element($doc, $relocate, "dfrn:addr", $owner['addr']);
 391                 xml::add_element($doc, $relocate, "dfrn:avatar", $owner['avatar']);
 392                 xml::add_element($doc, $relocate, "dfrn:photo", $photos[4]);
 393                 xml::add_element($doc, $relocate, "dfrn:thumb", $photos[5]);
 394                 xml::add_element($doc, $relocate, "dfrn:micro", $photos[6]);
 395                 xml::add_element($doc, $relocate, "dfrn:request", $owner['request']);
 396                 xml::add_element($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 397                 xml::add_element($doc, $relocate, "dfrn:notify", $owner['notify']);
 398                 xml::add_element($doc, $relocate, "dfrn:poll", $owner['poll']);
 399                 xml::add_element($doc, $relocate, "dfrn:sitepubkey", get_config('system','site_pubkey'));
 400
 401                 $root->appendChild($relocate);
 402
 403                 return(trim($doc->saveXML()));
 404         }
 405
 406         /**
 407          * @brief Adds the header elements for the DFRN protocol
 408          *
 409          * @param object $doc XML document
 410          * @param array $owner Owner record
 411          * @param string $authorelement Element name for the author
 412          * @param string $alternatelink link to profile or category
 413          * @param bool $public Is it a header for public posts?
 414          *
 415          * @return object XML root object
 416          * @todo Add type-hints
 417          */
 418         private static function add_header($doc, $owner, $authorelement, $alternatelink = "", $public = false) {
 419
 420                 if ($alternatelink == "") {
 421                         $alternatelink = $owner['url'];
 422                 }
 423
 424                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 425                 $doc->appendChild($root);
 426
 427                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 428                 $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 429                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 430                 $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 431                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 432                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 433                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 434                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 435                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 436
 437                 xml::add_element($doc, $root, "id", app::get_baseurl()."/profile/".$owner["nick"]);
 438                 xml::add_element($doc, $root, "title", $owner["name"]);
 439
 440                 $attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
 441                 xml::add_element($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 442
 443                 $attributes = array("rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/");
 444                 xml::add_element($doc, $root, "link", "", $attributes);
 445
 446                 $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $alternatelink);
 447                 xml::add_element($doc, $root, "link", "", $attributes);
 448
 449
 450                 if ($public) {
 451                         // DFRN itself doesn't uses this. But maybe someone else wants to subscribe to the public feed.
 452                         ostatus::hublinks($doc, $root);
 453
 454                         $attributes = array("rel" => "salmon", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 455                         xml::add_element($doc, $root, "link", "", $attributes);
 456
 457                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 458                         xml::add_element($doc, $root, "link", "", $attributes);
 459
 460                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 461                         xml::add_element($doc, $root, "link", "", $attributes);
 462                 }
 463
 464                 // For backward compatibility we keep this element
 465                 if ($owner['page-flags'] == PAGE_COMMUNITY) {
 466                         xml::add_element($doc, $root, "dfrn:community", 1);
 467                 }
 468
 469                 // The former element is replaced by this one
 470                 xml::add_element($doc, $root, "dfrn:account_type", $owner["account-type"]);
 471
 472                 /// @todo We need a way to transmit the different page flags like "PAGE_PRVGROUP"
 473
 474                 xml::add_element($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
 475
 476                 $author = self::add_author($doc, $owner, $authorelement, $public);
 477                 $root->appendChild($author);
 478
 479                 return $root;
 480         }
 481
 482         /**
 483          * @brief Adds the author element in the header for the DFRN protocol
 484          *
 485          * @param object $doc XML document
 486          * @param array $owner Owner record
 487          * @param string $authorelement Element name for the author
 488          *
 489          * @return object XML author object
 490          * @todo Add type-hints
 491          */
 492         private static function add_author($doc, $owner, $authorelement, $public) {
 493
 494                 // Is the profile hidden or shouldn't be published in the net? Then add the "hide" element
 495                 $r = q("SELECT `id` FROM `profile` INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 496                                 WHERE (`hidewall` OR NOT `net-publish`) AND `user`.`uid` = %d",
 497                         intval($owner['uid']));
 498                 if (dbm::is_result($r)) {
 499                         $hidewall = true;
 500                 } else {
 501                         $hidewall = false;
 502                 }
 503
 504                 $author = $doc->createElement($authorelement);
 505
 506                 $namdate = datetime_convert('UTC', 'UTC', $owner['name-date'].'+00:00', ATOM_TIME);
 507                 $uridate = datetime_convert('UTC', 'UTC', $owner['uri-date'].'+00:00', ATOM_TIME);
 508                 $picdate = datetime_convert('UTC', 'UTC', $owner['avatar-date'].'+00:00', ATOM_TIME);
 509
 510                 $attributes = array();
 511
 512                 if (!$public OR !$hidewall) {
 513                         $attributes = array("dfrn:updated" => $namdate);
 514                 }
 515
 516                 xml::add_element($doc, $author, "name", $owner["name"], $attributes);
 517                 xml::add_element($doc, $author, "uri", app::get_baseurl().'/profile/'.$owner["nickname"], $attributes);
 518                 xml::add_element($doc, $author, "dfrn:handle", $owner["addr"], $attributes);
 519
 520                 $attributes = array("rel" => "photo", "type" => "image/jpeg",
 521                                         "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 522
 523                 if (!$public OR !$hidewall) {
 524                         $attributes["dfrn:updated"] = $picdate;
 525                 }
 526
 527                 xml::add_element($doc, $author, "link", "", $attributes);
 528
 529                 $attributes["rel"] = "avatar";
 530                 xml::add_element($doc, $author, "link", "", $attributes);
 531
 532                 if ($hidewall) {
 533                         xml::add_element($doc, $author, "dfrn:hide", "true");
 534                 }
 535
 536                 // The following fields will only be generated if the data isn't meant for a public feed
 537                 if ($public) {
 538                         return $author;
 539                 }
 540
 541                 $birthday = feed_birthday($owner['uid'], $owner['timezone']);
 542
 543                 if ($birthday)
 544                         xml::add_element($doc, $author, "dfrn:birthday", $birthday);
 545
 546                 // Only show contact details when we are allowed to
 547                 $r = q("SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`,
 548                                 `user`.`timezone`, `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
 549                                 `profile`.`pub_keywords`, `profile`.`xmpp`, `profile`.`dob`
 550                         FROM `profile`
 551                                 INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 552                                 WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 553                         intval($owner['uid']));
 554                 if (dbm::is_result($r)) {
 555                         $profile = $r[0];
 556
 557                         xml::add_element($doc, $author, "poco:displayName", $profile["name"]);
 558                         xml::add_element($doc, $author, "poco:updated", $namdate);
 559
 560                         if (trim($profile["dob"]) != "0000-00-00")
 561                                 xml::add_element($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 562
 563                         xml::add_element($doc, $author, "poco:note", $profile["about"]);
 564                         xml::add_element($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 565
 566                         $savetz = date_default_timezone_get();
 567                         date_default_timezone_set($profile["timezone"]);
 568                         xml::add_element($doc, $author, "poco:utcOffset", date("P"));
 569                         date_default_timezone_set($savetz);
 570
 571                         if (trim($profile["homepage"]) != "") {
 572                                 $urls = $doc->createElement("poco:urls");
 573                                 xml::add_element($doc, $urls, "poco:type", "homepage");
 574                                 xml::add_element($doc, $urls, "poco:value", $profile["homepage"]);
 575                                 xml::add_element($doc, $urls, "poco:primary", "true");
 576                                 $author->appendChild($urls);
 577                         }
 578
 579                         if (trim($profile["pub_keywords"]) != "") {
 580                                 $keywords = explode(",", $profile["pub_keywords"]);
 581
 582                                 foreach ($keywords AS $keyword) {
 583                                         xml::add_element($doc, $author, "poco:tags", trim($keyword));
 584                                 }
 585
 586                         }
 587
 588                         if (trim($profile["xmpp"]) != "") {
 589                                 $ims = $doc->createElement("poco:ims");
 590                                 xml::add_element($doc, $ims, "poco:type", "xmpp");
 591                                 xml::add_element($doc, $ims, "poco:value", $profile["xmpp"]);
 592                                 xml::add_element($doc, $ims, "poco:primary", "true");
 593                                 $author->appendChild($ims);
 594                         }
 595
 596                         if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 597                                 $element = $doc->createElement("poco:address");
 598
 599                                 xml::add_element($doc, $element, "poco:formatted", formatted_location($profile));
 600
 601                                 if (trim($profile["locality"]) != "") {
 602                                         xml::add_element($doc, $element, "poco:locality", $profile["locality"]);
 603                                 }
 604
 605                                 if (trim($profile["region"]) != "") {
 606                                         xml::add_element($doc, $element, "poco:region", $profile["region"]);
 607                                 }
 608
 609                                 if (trim($profile["country-name"]) != "") {
 610                                         xml::add_element($doc, $element, "poco:country", $profile["country-name"]);
 611                                 }
 612
 613                                 $author->appendChild($element);
 614                         }
 615                 }
 616
 617                 return $author;
 618         }
 619
 620         /**
 621          * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 622          *
 623          * @param object $doc XML document
 624          * @param string $element Element name for the author
 625          * @param string $contact_url Link of the contact
 626          * @param array $items Item elements
 627          *
 628          * @return object XML author object
 629          * @todo Add type-hints
 630          */
 631         private static function add_entry_author($doc, $element, $contact_url, $item) {
 632
 633                 $contact = get_contact_details_by_url($contact_url, $item["uid"]);
 634
 635                 $author = $doc->createElement($element);
 636                 xml::add_element($doc, $author, "name", $contact["name"]);
 637                 xml::add_element($doc, $author, "uri", $contact["url"]);
 638                 xml::add_element($doc, $author, "dfrn:handle", $contact["addr"]);
 639
 640                 /// @Todo
 641                 /// - Check real image type and image size
 642                 /// - Check which of these boths elements we should use
 643                 $attributes = array(
 644                                 "rel" => "photo",
 645                                 "type" => "image/jpeg",
 646                                 "media:width" => 80,
 647                                 "media:height" => 80,
 648                                 "href" => $contact["photo"]);
 649                 xml::add_element($doc, $author, "link", "", $attributes);
 650
 651                 $attributes = array(
 652                                 "rel" => "avatar",
 653                                 "type" => "image/jpeg",
 654                                 "media:width" => 80,
 655                                 "media:height" => 80,
 656                                 "href" => $contact["photo"]);
 657                 xml::add_element($doc, $author, "link", "", $attributes);
 658
 659                 return $author;
 660         }
 661
 662         /**
 663          * @brief Adds the activity elements
 664          *
 665          * @param object $doc XML document
 666          * @param string $element Element name for the activity
 667          * @param string $activity activity value
 668          *
 669          * @return object XML activity object
 670          * @todo Add type-hints
 671          */
 672         private static function create_activity($doc, $element, $activity) {
 673
 674                 if ($activity) {
 675                         $entry = $doc->createElement($element);
 676
 677                         $r = parse_xml_string($activity, false);
 678                         if (!$r) {
 679                                 return false;
 680                         }
 681                         if ($r->type) {
 682                                 xml::add_element($doc, $entry, "activity:object-type", $r->type);
 683                         }
 684                         if ($r->id) {
 685                                 xml::add_element($doc, $entry, "id", $r->id);
 686                         }
 687                         if ($r->title) {
 688                                 xml::add_element($doc, $entry, "title", $r->title);
 689                         }
 690
 691                         if ($r->link) {
 692                                 if (substr($r->link,0,1) == '<') {
 693                                         if (strstr($r->link,'&') && (! strstr($r->link,'&amp;'))) {
 694                                                 $r->link = str_replace('&','&amp;', $r->link);
 695                                         }
 696
 697                                         $r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
 698
 699                                         // XML does need a single element as root element so we add a dummy element here
 700                                         $data = parse_xml_string("<dummy>".$r->link."</dummy>", false);
 701                                         if (is_object($data)) {
 702                                                 foreach ($data->link AS $link) {
 703                                                         $attributes = array();
 704                                                         foreach ($link->attributes() AS $parameter => $value) {
 705                                                                 $attributes[$parameter] = $value;
 706                                                         }
 707                                                         xml::add_element($doc, $entry, "link", "", $attributes);
 708                                                 }
 709                                         }
 710                                 } else {
 711                                         $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $r->link);
 712                                         xml::add_element($doc, $entry, "link", "", $attributes);
 713                                 }
 714                         }
 715                         if ($r->content) {
 716                                 xml::add_element($doc, $entry, "content", bbcode($r->content), array("type" => "html"));
 717                         }
 718
 719                         return $entry;
 720                 }
 721
 722                 return false;
 723         }
 724
 725         /**
 726          * @brief Adds the elements for attachments
 727          *
 728          * @param object $doc XML document
 729          * @param object $root XML root
 730          * @param array $item Item element
 731          *
 732          * @return object XML attachment object
 733          * @todo Add type-hints
 734          */
 735         private static function get_attachment($doc, $root, $item) {
 736                 $arr = explode('[/attach],',$item['attach']);
 737                 if (count($arr)) {
 738                         foreach ($arr as $r) {
 739                                 $matches = false;
 740                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|',$r,$matches);
 741                                 if ($cnt) {
 742                                         $attributes = array("rel" => "enclosure",
 743                                                         "href" => $matches[1],
 744                                                         "type" => $matches[3]);
 745
 746                                         if (intval($matches[2])) {
 747                                                 $attributes["length"] = intval($matches[2]);
 748                                         }
 749
 750                                         if (trim($matches[4]) != "") {
 751                                                 $attributes["title"] = trim($matches[4]);
 752                                         }
 753
 754                                         xml::add_element($doc, $root, "link", "", $attributes);
 755                                 }
 756                         }
 757                 }
 758         }
 759
 760         /**
 761          * @brief Adds the "entry" elements for the DFRN protocol
 762          *
 763          * @param object $doc XML document
 764          * @param string $type "text" or "html"
 765          * @param array $item Item element
 766          * @param array $owner Owner record
 767          * @param bool $comment Trigger the sending of the "comment" element
 768          * @param int $cid Contact ID of the recipient
 769          *
 770          * @return object XML entry object
 771          * @todo Add type-hints
 772          */
 773         private static function entry($doc, $type, $item, $owner, $comment = false, $cid = 0) {
 774
 775                 $mentioned = array();
 776
 777                 if (!$item['parent']) {
 778                         return;
 779                 }
 780
 781                 if ($item['deleted']) {
 782                         $attributes = array("ref" => $item['uri'], "when" => datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME));
 783                         return xml::create_element($doc, "at:deleted-entry", "", $attributes);
 784                 }
 785
 786                 $entry = $doc->createElement("entry");
 787
 788                 if ($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid']) {
 789                         $body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
 790                 } else {
 791                         $body = $item['body'];
 792                 }
 793
 794                 // Remove the abstract element. It is only locally important.
 795                 $body = remove_abstract($body);
 796
 797                 if ($type == 'html') {
 798                         $htmlbody = $body;
 799
 800                         if ($item['title'] != "") {
 801                                 $htmlbody = "[b]".$item['title']."[/b]\n\n".$htmlbody;
 802                         }
 803
 804                         $htmlbody = bbcode($htmlbody, false, false, 7);
 805                 }
 806
 807                 $author = self::add_entry_author($doc, "author", $item["author-link"], $item);
 808                 $entry->appendChild($author);
 809
 810                 $dfrnowner = self::add_entry_author($doc, "dfrn:owner", $item["owner-link"], $item);
 811                 $entry->appendChild($dfrnowner);
 812
 813                 if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 814                         $parent = q("SELECT `guid` FROM `item` WHERE `id` = %d", intval($item["parent"]));
 815                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 816                         $attributes = array("ref" => $parent_item, "type" => "text/html",
 817                                                 "href" => app::get_baseurl().'/display/'.$parent[0]['guid'],
 818                                                 "dfrn:diaspora_guid" => $parent[0]['guid']);
 819                         xml::add_element($doc, $entry, "thr:in-reply-to", "", $attributes);
 820                 }
 821
 822                 xml::add_element($doc, $entry, "id", $item["uri"]);
 823                 xml::add_element($doc, $entry, "title", $item["title"]);
 824
 825                 xml::add_element($doc, $entry, "published", datetime_convert("UTC","UTC",$item["created"]."+00:00",ATOM_TIME));
 826                 xml::add_element($doc, $entry, "updated", datetime_convert("UTC","UTC",$item["edited"]."+00:00",ATOM_TIME));
 827
 828                 // "dfrn:env" is used to read the content
 829                 xml::add_element($doc, $entry, "dfrn:env", base64url_encode($body, true));
 830
 831                 // The "content" field is not read by the receiver. We could remove it when the type is "text"
 832                 // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
 833                 xml::add_element($doc, $entry, "content", (($type == 'html') ? $htmlbody : $body), array("type" => $type));
 834
 835                 // We save this value in "plink". Maybe we should read it from there as well?
 836                 xml::add_element($doc, $entry, "link", "", array("rel" => "alternate", "type" => "text/html",
 837                                                                 "href" => app::get_baseurl()."/display/".$item["guid"]));
 838
 839                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
 840                 // It is included in the rewritten code for completeness
 841                 if ($comment) {
 842                         xml::add_element($doc, $entry, "dfrn:comment-allow", intval($item['last-child']));
 843                 }
 844
 845                 if ($item['location']) {
 846                         xml::add_element($doc, $entry, "dfrn:location", $item['location']);
 847                 }
 848
 849                 if ($item['coord']) {
 850                         xml::add_element($doc, $entry, "georss:point", $item['coord']);
 851                 }
 852
 853                 if (($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid'])) {
 854                         xml::add_element($doc, $entry, "dfrn:private", (($item['private']) ? $item['private'] : 1));
 855                 }
 856
 857                 if ($item['extid']) {
 858                         xml::add_element($doc, $entry, "dfrn:extid", $item['extid']);
 859                 }
 860
 861                 if ($item['bookmark']) {
 862                         xml::add_element($doc, $entry, "dfrn:bookmark", "true");
 863                 }
 864
 865                 if ($item['app']) {
 866                         xml::add_element($doc, $entry, "statusnet:notice_info", "", array("local_id" => $item['id'], "source" => $item['app']));
 867                 }
 868
 869                 xml::add_element($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
 870
 871                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
 872                 // It is needed for relayed comments to Diaspora.
 873                 if ($item['signed_text']) {
 874                         $sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
 875                         xml::add_element($doc, $entry, "dfrn:diaspora_signature", $sign);
 876                 }
 877
 878                 xml::add_element($doc, $entry, "activity:verb", construct_verb($item));
 879
 880                 if ($item['object-type'] != "") {
 881                         xml::add_element($doc, $entry, "activity:object-type", $item['object-type']);
 882                 } elseif ($item['id'] == $item['parent']) {
 883                         xml::add_element($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
 884                 } else {
 885                         xml::add_element($doc, $entry, "activity:object-type", ACTIVITY_OBJ_COMMENT);
 886                 }
 887
 888                 $actobj = self::create_activity($doc, "activity:object", $item['object']);
 889                 if ($actobj) {
 890                         $entry->appendChild($actobj);
 891                 }
 892
 893                 $actarg = self::create_activity($doc, "activity:target", $item['target']);
 894                 if ($actarg) {
 895                         $entry->appendChild($actarg);
 896                 }
 897
 898                 $tags = item_getfeedtags($item);
 899
 900                 if (count($tags)) {
 901                         foreach ($tags as $t) {
 902                                 if (($type != 'html') OR ($t[0] != "@")) {
 903                                         xml::add_element($doc, $entry, "category", "", array("scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]));
 904                                 }
 905                         }
 906                 }
 907
 908                 if (count($tags)) {
 909                         foreach ($tags as $t) {
 910                                 if ($t[0] == "@") {
 911                                         $mentioned[$t[1]] = $t[1];
 912                                 }
 913                         }
 914                 }
 915
 916                 foreach ($mentioned AS $mention) {
 917                         $r = q("SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
 918                                 intval($owner["uid"]),
 919                                 dbesc(normalise_link($mention)));
 920
 921                         if (!dbm::is_result($r)) {
 922                                 /// @TODO Maybe some logging?
 923                                 killme();
 924                         }
 925
 926                         if ($r[0]["forum"] OR $r[0]["prv"]) {
 927                                 xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 928                                                                                         "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
 929                                                                                         "href" => $mention));
 930                         } else {
 931                                 xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 932                                                                                         "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
 933                                                                                         "href" => $mention));
 934                         }
 935                 }
 936
 937                 self::get_attachment($doc, $entry, $item);
 938
 939                 return $entry;
 940         }
 941
 942         /**
 943          * @brief Delivers the atom content to the contacts
 944          *
 945          * @param array $owner Owner record
 946          * @param array $contactr Contact record of the receiver
 947          * @param string $atom Content that will be transmitted
 948          * @param bool $dissolve (to be documented)
 949          *
 950          * @return int Deliver status. -1 means an error.
 951          * @todo Add array type-hint for $owner, $contact
 952          */
 953         public static function deliver($owner,$contact,$atom, $dissolve = false) {
 954
 955                 $a = get_app();
 956
 957                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
 958
 959                 if ($contact['duplex'] && $contact['dfrn-id']) {
 960                         $idtosend = '0:' . $orig_id;
 961                 }
 962                 if ($contact['duplex'] && $contact['issued-id']) {
 963                         $idtosend = '1:' . $orig_id;
 964                 }
 965
 966                 $rino = get_config('system','rino_encrypt');
 967                 $rino = intval($rino);
 968
 969                 // use RINO1 if mcrypt isn't installed and RINO2 was selected
 970                 if ($rino == 2 and !function_exists('mcrypt_create_iv')) {
 971                         $rino = 1;
 972                 }
 973
 974                 logger("Local rino version: ". $rino, LOGGER_DEBUG);
 975
 976                 $ssl_val = intval(get_config('system','ssl_policy'));
 977                 $ssl_policy = '';
 978
 979                 switch($ssl_val){
 980                         case SSL_POLICY_FULL:
 981                                 $ssl_policy = 'full';
 982                                 break;
 983                         case SSL_POLICY_SELFSIGN:
 984                                 $ssl_policy = 'self';
 985                                 break;
 986                         case SSL_POLICY_NONE:
 987                         default:
 988                                 $ssl_policy = 'none';
 989                                 break;
 990                 }
 991
 992                 $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
 993
 994                 logger('dfrn_deliver: ' . $url);
 995
 996                 $ret = z_fetch_url($url);
 997
 998                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 999                         return -2; // timed out
1000                 }
1001
1002                 $xml = $ret['body'];
1003
1004                 $curl_stat = $a->get_curl_code();
1005                 if (!$curl_stat) {
1006                         return -3; // timed out
1007                 }
1008
1009                 logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
1010
1011                 if (! $xml) {
1012                         return 3;
1013                 }
1014
1015                 if (strpos($xml,'<?xml') === false) {
1016                         logger('dfrn_deliver: no valid XML returned');
1017                         logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
1018                         return 3;
1019                 }
1020
1021                 $res = parse_xml_string($xml);
1022
1023                 if ((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id))) {
1024                         return (($res->status) ? $res->status : 3);
1025                 }
1026
1027                 $postvars     = array();
1028                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
1029                 $challenge    = hex2bin((string) $res->challenge);
1030                 $perm         = (($res->perm) ? $res->perm : null);
1031                 $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
1032                 $rino_remote_version = intval($res->rino);
1033                 $page         = (($owner['page-flags'] == PAGE_COMMUNITY) ? 1 : 0);
1034
1035                 logger("Remote rino version: ".$rino_remote_version." for ".$contact["url"], LOGGER_DEBUG);
1036
1037                 if ($owner['page-flags'] == PAGE_PRVGROUP) {
1038                         $page = 2;
1039                 }
1040
1041                 $final_dfrn_id = '';
1042
1043                 if ($perm) {
1044                         if ((($perm == 'rw') && (! intval($contact['writable'])))
1045                                 || (($perm == 'r') && (intval($contact['writable'])))) {
1046                                 q("update contact set writable = %d where id = %d",
1047                                         intval(($perm == 'rw') ? 1 : 0),
1048                                         intval($contact['id'])
1049                                 );
1050                                 $contact['writable'] = (string) 1 - intval($contact['writable']);
1051                         }
1052                 }
1053
1054                 if (($contact['duplex'] && strlen($contact['pubkey']))
1055                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1056                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
1057                         openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
1058                         openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
1059                 } else {
1060                         openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
1061                         openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
1062                 }
1063
1064                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
1065
1066                 if (strpos($final_dfrn_id,':') == 1) {
1067                         $final_dfrn_id = substr($final_dfrn_id,2);
1068                 }
1069
1070                 if ($final_dfrn_id != $orig_id) {
1071                         logger('dfrn_deliver: wrong dfrn_id.');
1072                         // did not decode properly - cannot trust this site
1073                         return 3;
1074                 }
1075
1076                 $postvars['dfrn_id']      = $idtosend;
1077                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
1078                 if ($dissolve) {
1079                         $postvars['dissolve'] = '1';
1080                 }
1081
1082
1083                 if ((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1084                         $postvars['data'] = $atom;
1085                         $postvars['perm'] = 'rw';
1086                 } else {
1087                         $postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
1088                         $postvars['perm'] = 'r';
1089                 }
1090
1091                 $postvars['ssl_policy'] = $ssl_policy;
1092
1093                 if ($page) {
1094                         $postvars['page'] = $page;
1095                 }
1096
1097
1098                 if ($rino > 0 && $rino_remote_version > 0 && (! $dissolve)) {
1099                         logger('rino version: '. $rino_remote_version);
1100
1101                         switch($rino_remote_version) {
1102                                 case 1:
1103                                         // Deprecated rino version!
1104                                         $key = substr(random_string(),0,16);
1105                                         $data = aes_encrypt($postvars['data'],$key);
1106                                         break;
1107                                 case 2:
1108                                         // RINO 2 based on php-encryption
1109                                         try {
1110                                                 $key = Crypto::createNewRandomKey();
1111                                         } catch (CryptoTestFailed $ex) {
1112                                                 logger('Cannot safely create a key');
1113                                                 return -4;
1114                                         } catch (CannotPerformOperation $ex) {
1115                                                 logger('Cannot safely create a key');
1116                                                 return -5;
1117                                         }
1118                                         try {
1119                                                 $data = Crypto::encrypt($postvars['data'], $key);
1120                                         } catch (CryptoTestFailed $ex) {
1121                                                 logger('Cannot safely perform encryption');
1122                                                 return -6;
1123                                         } catch (CannotPerformOperation $ex) {
1124                                                 logger('Cannot safely perform encryption');
1125                                                 return -7;
1126                                         }
1127                                         break;
1128                                 default:
1129                                         logger("rino: invalid requested verision '$rino_remote_version'");
1130                                         return -8;
1131                         }
1132
1133                         $postvars['rino'] = $rino_remote_version;
1134                         $postvars['data'] = bin2hex($data);
1135
1136                         //logger('rino: sent key = ' . $key, LOGGER_DEBUG);
1137
1138
1139                         if ($dfrn_version >= 2.1) {
1140                                 if (($contact['duplex'] && strlen($contact['pubkey']))
1141                                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1142                                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
1143
1144                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1145                                 } else {
1146                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1147                                 }
1148
1149                         } else {
1150                                 if (($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1151                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1152                                 } else {
1153                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1154                                 }
1155
1156                         }
1157
1158                         logger('md5 rawkey ' . md5($postvars['key']));
1159
1160                         $postvars['key'] = bin2hex($postvars['key']);
1161                 }
1162
1163
1164                 logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars,true), LOGGER_DATA);
1165
1166                 $xml = post_url($contact['notify'], $postvars);
1167
1168                 logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
1169
1170                 $curl_stat = $a->get_curl_code();
1171                 if ((!$curl_stat) || (!strlen($xml))) {
1172                         return -9; // timed out
1173                 }
1174
1175                 if (($curl_stat == 503) && (stristr($a->get_curl_headers(),'retry-after'))) {
1176                         return -10;
1177                 }
1178
1179                 if (strpos($xml,'<?xml') === false) {
1180                         logger('dfrn_deliver: phase 2: no valid XML returned');
1181                         logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
1182                         return 3;
1183                 }
1184
1185                 /// @TODO Really compare with > here? Maybe DateTime (which allows such comparison again) is much safer/correcter
1186                 if ($contact['term-date'] > NULL_DATE) {
1187                         logger("dfrn_deliver: $url back from the dead - removing mark for death");
1188                         require_once('include/Contact.php');
1189                         unmark_for_death($contact);
1190                 }
1191
1192                 $res = parse_xml_string($xml);
1193
1194                 return $res->status;
1195         }
1196
1197         /**
1198          * @brief Add new birthday event for this person
1199          *
1200          * @param array $contact Contact record
1201          * @param string $birthday Birthday of the contact
1202          * @todo Add array type-hint for $contact
1203          */
1204         private static function birthday_event($contact, $birthday) {
1205
1206                 // Check for duplicates
1207                 $r = q("SELECT `id` FROM `event` WHERE `uid` = %d AND `cid` = %d AND `start` = '%s' AND `type` = '%s' LIMIT 1",
1208                         intval($contact["uid"]),
1209                         intval($contact["id"]),
1210                         dbesc(datetime_convert("UTC","UTC", $birthday)),
1211                         dbesc("birthday"));
1212
1213                 if (dbm::is_result($r)) {
1214                         return;
1215                 }
1216
1217                 logger("updating birthday: ".$birthday." for contact ".$contact["id"]);
1218
1219                 $bdtext = sprintf(t("%s\'s birthday"), $contact["name"]);
1220                 $bdtext2 = sprintf(t("Happy Birthday %s"), " [url=".$contact["url"]."]".$contact["name"]."[/url]") ;
1221
1222                 $r = q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`)
1223                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s') ",
1224                         intval($contact["uid"]),
1225                         intval($contact["id"]),
1226                         dbesc(datetime_convert()),
1227                         dbesc(datetime_convert()),
1228                         dbesc(datetime_convert("UTC","UTC", $birthday)),
1229                         dbesc(datetime_convert("UTC","UTC", $birthday." + 1 day ")),
1230                         dbesc($bdtext),
1231                         dbesc($bdtext2),
1232                         dbesc("birthday")
1233                 );
1234         }
1235
1236         /**
1237          * @brief Fetch the author data from head or entry items
1238          *
1239          * @param object $xpath XPath object
1240          * @param object $context In which context should the data be searched
1241          * @param array $importer Record of the importer user mixed with contact of the content
1242          * @param string $element Element name from which the data is fetched
1243          * @param bool $onlyfetch Should the data only be fetched or should it update the contact record as well
1244          *
1245          * @return Returns an array with relevant data of the author
1246          * @todo Find good type-hints for all parameter
1247          */
1248         private static function fetchauthor($xpath, $context, $importer, $element, $onlyfetch, $xml = "") {
1249
1250                 $author = array();
1251                 $author["name"] = $xpath->evaluate($element."/atom:name/text()", $context)->item(0)->nodeValue;
1252                 $author["link"] = $xpath->evaluate($element."/atom:uri/text()", $context)->item(0)->nodeValue;
1253
1254                 $r = q("SELECT `id`, `uid`, `url`, `network`, `avatar-date`, `name-date`, `uri-date`, `addr`,
1255                                 `name`, `nick`, `about`, `location`, `keywords`, `xmpp`, `bdyear`, `bd`, `hidden`, `contact-type`
1256                                 FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND `network` != '%s'",
1257                         intval($importer["uid"]), dbesc(normalise_link($author["link"])), dbesc(NETWORK_STATUSNET));
1258
1259                 if (dbm::is_result($r)) {
1260                         $contact = $r[0];
1261                         $author["contact-id"] = $r[0]["id"];
1262                         $author["network"] = $r[0]["network"];
1263                 } else {
1264                         if (!$onlyfetch) {
1265                                 logger("Contact ".$author["link"]." wasn't found for user ".$importer["uid"]." XML: ".$xml, LOGGER_DEBUG);
1266                         }
1267
1268                         $author["contact-id"] = $importer["id"];
1269                         $author["network"] = $importer["network"];
1270                         $onlyfetch = true;
1271                 }
1272
1273                 // Until now we aren't serving different sizes - but maybe later
1274                 $avatarlist = array();
1275                 /// @todo check if "avatar" or "photo" would be the best field in the specification
1276                 $avatars = $xpath->query($element."/atom:link[@rel='avatar']", $context);
1277                 foreach ($avatars AS $avatar) {
1278                         $href = "";
1279                         $width = 0;
1280                         foreach ($avatar->attributes AS $attributes) {
1281                                 /// @TODO Rewrite these similar if () to one switch
1282                                 if ($attributes->name == "href") {
1283                                         $href = $attributes->textContent;
1284                                 }
1285                                 if ($attributes->name == "width") {
1286                                         $width = $attributes->textContent;
1287                                 }
1288                                 if ($attributes->name == "updated") {
1289                                         $contact["avatar-date"] = $attributes->textContent;
1290                                 }
1291                         }
1292                         if (($width > 0) AND ($href != "")) {
1293                                 $avatarlist[$width] = $href;
1294                         }
1295                 }
1296                 if (count($avatarlist) > 0) {
1297                         krsort($avatarlist);
1298                         $author["avatar"] = current($avatarlist);
1299                 }
1300
1301                 if (dbm::is_result($r) AND !$onlyfetch) {
1302                         logger("Check if contact details for contact ".$r[0]["id"]." (".$r[0]["nick"].") have to be updated.", LOGGER_DEBUG);
1303
1304                         $poco = array("url" => $contact["url"]);
1305
1306                         // When was the last change to name or uri?
1307                         $name_element = $xpath->query($element."/atom:name", $context)->item(0);
1308                         foreach ($name_element->attributes AS $attributes) {
1309                                 if ($attributes->name == "updated") {
1310                                         $poco["name-date"] = $attributes->textContent;
1311                                 }
1312                         }
1313
1314                         $link_element = $xpath->query($element."/atom:link", $context)->item(0);
1315                         foreach ($link_element->attributes AS $attributes) {
1316                                 if ($attributes->name == "updated") {
1317                                         $poco["uri-date"] = $attributes->textContent;
1318                                 }
1319                         }
1320
1321                         // Update contact data
1322                         $value = $xpath->evaluate($element."/dfrn:handle/text()", $context)->item(0)->nodeValue;
1323                         if ($value != "") {
1324                                 $poco["addr"] = $value;
1325                         }
1326
1327                         $value = $xpath->evaluate($element."/poco:displayName/text()", $context)->item(0)->nodeValue;
1328                         if ($value != "") {
1329                                 $poco["name"] = $value;
1330                         }
1331
1332                         $value = $xpath->evaluate($element."/poco:preferredUsername/text()", $context)->item(0)->nodeValue;
1333                         if ($value != "") {
1334                                 $poco["nick"] = $value;
1335                         }
1336
1337                         $value = $xpath->evaluate($element."/poco:note/text()", $context)->item(0)->nodeValue;
1338                         if ($value != "") {
1339                                 $poco["about"] = $value;
1340                         }
1341
1342                         $value = $xpath->evaluate($element."/poco:address/poco:formatted/text()", $context)->item(0)->nodeValue;
1343                         if ($value != "") {
1344                                 $poco["location"] = $value;
1345                         }
1346
1347                         /// @todo Only search for elements with "poco:type" = "xmpp"
1348                         $value = $xpath->evaluate($element."/poco:ims/poco:value/text()", $context)->item(0)->nodeValue;
1349                         if ($value != "") {
1350                                 $poco["xmpp"] = $value;
1351                         }
1352
1353                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1354                         /// - poco:utcOffset
1355                         /// - poco:urls
1356                         /// - poco:locality
1357                         /// - poco:region
1358                         /// - poco:country
1359
1360                         // If the "hide" element is present then the profile isn't searchable.
1361                         $hide = intval($xpath->evaluate($element."/dfrn:hide/text()", $context)->item(0)->nodeValue == "true");
1362
1363                         logger("Hidden status for contact ".$contact["url"].": ".$hide, LOGGER_DEBUG);
1364
1365                         // If the contact isn't searchable then set the contact to "hidden".
1366                         // Problem: This can be manually overridden by the user.
1367                         if ($hide) {
1368                                 $contact["hidden"] = true;
1369                         }
1370
1371                         // Save the keywords into the contact table
1372                         $tags = array();
1373                         $tagelements = $xpath->evaluate($element."/poco:tags/text()", $context);
1374                         foreach ($tagelements AS $tag) {
1375                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1376                         }
1377
1378                         if (count($tags)) {
1379                                 $poco["keywords"] = implode(", ", $tags);
1380                         }
1381
1382                         // "dfrn:birthday" contains the birthday converted to UTC
1383                         $old_bdyear = $contact["bdyear"];
1384
1385                         $birthday = $xpath->evaluate($element."/dfrn:birthday/text()", $context)->item(0)->nodeValue;
1386
1387                         if (strtotime($birthday) > time()) {
1388                                 $bd_timestamp = strtotime($birthday);
1389
1390                                 $poco["bdyear"] = date("Y", $bd_timestamp);
1391                         }
1392
1393                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1394                         $value = $xpath->evaluate($element."/poco:birthday/text()", $context)->item(0)->nodeValue;
1395
1396                         if (!in_array($value, array("", "0000-00-00"))) {
1397                                 $bdyear = date("Y");
1398                                 $value = str_replace("0000", $bdyear, $value);
1399
1400                                 if (strtotime($value) < time()) {
1401                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1402                                         $bdyear = $bdyear + 1;
1403                                 }
1404
1405                                 $poco["bd"] = $value;
1406                         }
1407
1408                         $contact = array_merge($contact, $poco);
1409
1410                         if ($old_bdyear != $contact["bdyear"]) {
1411                                 self::birthday_event($contact, $birthday);
1412                         }
1413
1414                         // Get all field names
1415                         $fields = array();
1416                         foreach ($r[0] AS $field => $data) {
1417                                 $fields[$field] = $data;
1418                         }
1419
1420                         unset($fields["id"]);
1421                         unset($fields["uid"]);
1422                         unset($fields["url"]);
1423                         unset($fields["avatar-date"]);
1424                         unset($fields["name-date"]);
1425                         unset($fields["uri-date"]);
1426
1427                         // Update check for this field has to be done differently
1428                         $datefields = array("name-date", "uri-date");
1429                         foreach ($datefields AS $field) {
1430                                 if (strtotime($contact[$field]) > strtotime($r[0][$field])) {
1431                                         logger("Difference for contact ".$contact["id"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
1432                                         $update = true;
1433                                 }
1434                         }
1435
1436                         foreach ($fields AS $field => $data) {
1437                                 if ($contact[$field] != $r[0][$field]) {
1438                                         logger("Difference for contact ".$contact["id"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
1439                                         $update = true;
1440                                 }
1441                         }
1442
1443                         if ($update) {
1444                                 logger("Update contact data for contact ".$contact["id"]." (".$contact["nick"].")", LOGGER_DEBUG);
1445
1446                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `about` = '%s', `location` = '%s',
1447                                         `addr` = '%s', `keywords` = '%s', `bdyear` = '%s', `bd` = '%s', `hidden` = %d,
1448                                         `xmpp` = '%s', `name-date`  = '%s', `uri-date` = '%s'
1449                                         WHERE `id` = %d AND `network` = '%s'",
1450                                         dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["about"]), dbesc($contact["location"]),
1451                                         dbesc($contact["addr"]), dbesc($contact["keywords"]), dbesc($contact["bdyear"]),
1452                                         dbesc($contact["bd"]), intval($contact["hidden"]), dbesc($contact["xmpp"]),
1453                                         dbesc($contact["name-date"]), dbesc($contact["uri-date"]),
1454                                         intval($contact["id"]), dbesc($contact["network"]));
1455                         }
1456
1457                         update_contact_avatar($author["avatar"], $importer["uid"], $contact["id"],
1458                                                 (strtotime($contact["avatar-date"]) > strtotime($r[0]["avatar-date"])));
1459
1460                         // The generation is a sign for the reliability of the provided data.
1461                         // It is used in the socgraph.php to prevent that old contact data
1462                         // that was relayed over several servers can overwrite contact
1463                         // data that we received directly.
1464
1465                         $poco["generation"] = 2;
1466                         $poco["photo"] = $author["avatar"];
1467                         $poco["hide"] = $hide;
1468                         $poco["contact-type"] = $contact["contact-type"];
1469                         update_gcontact($poco);
1470                 }
1471
1472                 return($author);
1473         }
1474
1475         /**
1476          * @brief Transforms activity objects into an XML string
1477          *
1478          * @param object $xpath XPath object
1479          * @param object $activity Activity object
1480          * @param text $element element name
1481          *
1482          * @return string XML string
1483          * @todo Find good type-hints for all parameter
1484          */
1485         private static function transform_activity($xpath, $activity, $element) {
1486                 if (!is_object($activity)) {
1487                         return "";
1488                 }
1489
1490                 $obj_doc = new DOMDocument("1.0", "utf-8");
1491                 $obj_doc->formatOutput = true;
1492
1493                 $obj_element = $obj_doc->createElementNS(NAMESPACE_ATOM1, $element);
1494
1495                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1496                 xml::add_element($obj_doc, $obj_element, "type", $activity_type);
1497
1498                 $id = $xpath->query("atom:id", $activity)->item(0);
1499                 if (is_object($id)) {
1500                         $obj_element->appendChild($obj_doc->importNode($id, true));
1501                 }
1502
1503                 $title = $xpath->query("atom:title", $activity)->item(0);
1504                 if (is_object($title)) {
1505                         $obj_element->appendChild($obj_doc->importNode($title, true));
1506                 }
1507
1508                 $links = $xpath->query("atom:link", $activity);
1509                 if (is_object($links)) {
1510                         foreach ($links AS $link) {
1511                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1512                         }
1513                 }
1514
1515                 $content = $xpath->query("atom:content", $activity)->item(0);
1516                 if (is_object($content)) {
1517                         $obj_element->appendChild($obj_doc->importNode($content, true));
1518                 }
1519
1520                 $obj_doc->appendChild($obj_element);
1521
1522                 $objxml = $obj_doc->saveXML($obj_element);
1523
1524                 /// @todo This isn't totally clean. We should find a way to transform the namespaces
1525                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1526                 return($objxml);
1527         }
1528
1529         /**
1530          * @brief Processes the mail elements
1531          *
1532          * @param object $xpath XPath object
1533          * @param object $mail mail elements
1534          * @param array $importer Record of the importer user mixed with contact of the content
1535          * @todo Find good type-hints for all parameter
1536          */
1537         private static function process_mail($xpath, $mail, $importer) {
1538
1539                 logger("Processing mails");
1540
1541                 /// @TODO Rewrite this to one statement
1542                 $msg = array();
1543                 $msg["uid"] = $importer["importer_uid"];
1544                 $msg["from-name"] = $xpath->query("dfrn:sender/dfrn:name/text()", $mail)->item(0)->nodeValue;
1545                 $msg["from-url"] = $xpath->query("dfrn:sender/dfrn:uri/text()", $mail)->item(0)->nodeValue;
1546                 $msg["from-photo"] = $xpath->query("dfrn:sender/dfrn:avatar/text()", $mail)->item(0)->nodeValue;
1547                 $msg["contact-id"] = $importer["id"];
1548                 $msg["uri"] = $xpath->query("dfrn:id/text()", $mail)->item(0)->nodeValue;
1549                 $msg["parent-uri"] = $xpath->query("dfrn:in-reply-to/text()", $mail)->item(0)->nodeValue;
1550                 $msg["created"] = $xpath->query("dfrn:sentdate/text()", $mail)->item(0)->nodeValue;
1551                 $msg["title"] = $xpath->query("dfrn:subject/text()", $mail)->item(0)->nodeValue;
1552                 $msg["body"] = $xpath->query("dfrn:content/text()", $mail)->item(0)->nodeValue;
1553                 $msg["seen"] = 0;
1554                 $msg["replied"] = 0;
1555
1556                 dbm::esc_array($msg, true);
1557
1558                 $r = dbq("INSERT INTO `mail` (`".implode("`, `", array_keys($msg))."`) VALUES (".implode(", ", array_values($msg)).")");
1559
1560                 // send notifications.
1561                 /// @TODO Arange this mess
1562                 $notif_params = array(
1563                         "type" => NOTIFY_MAIL,
1564                         "notify_flags" => $importer["notify-flags"],
1565                         "language" => $importer["language"],
1566                         "to_name" => $importer["username"],
1567                         "to_email" => $importer["email"],
1568                         "uid" => $importer["importer_uid"],
1569                         "item" => $msg,
1570                         "source_name" => $msg["from-name"],
1571                         "source_link" => $importer["url"],
1572                         "source_photo" => $importer["thumb"],
1573                         "verb" => ACTIVITY_POST,
1574                         "otype" => "mail"
1575                 );
1576
1577                 notification($notif_params);
1578
1579                 logger("Mail is processed, notification was sent.");
1580         }
1581
1582         /**
1583          * @brief Processes the suggestion elements
1584          *
1585          * @param object $xpath XPath object
1586          * @param object $suggestion suggestion elements
1587          * @param array $importer Record of the importer user mixed with contact of the content
1588          * @todo Find good type-hints for all parameter
1589          */
1590         private static function process_suggestion($xpath, $suggestion, $importer) {
1591                 $a = get_app();
1592
1593                 logger("Processing suggestions");
1594
1595                 /// @TODO Rewrite this to one statement
1596                 $suggest = array();
1597                 $suggest["uid"] = $importer["importer_uid"];
1598                 $suggest["cid"] = $importer["id"];
1599                 $suggest["url"] = $xpath->query("dfrn:url/text()", $suggestion)->item(0)->nodeValue;
1600                 $suggest["name"] = $xpath->query("dfrn:name/text()", $suggestion)->item(0)->nodeValue;
1601                 $suggest["photo"] = $xpath->query("dfrn:photo/text()", $suggestion)->item(0)->nodeValue;
1602                 $suggest["request"] = $xpath->query("dfrn:request/text()", $suggestion)->item(0)->nodeValue;
1603                 $suggest["body"] = $xpath->query("dfrn:note/text()", $suggestion)->item(0)->nodeValue;
1604
1605                 // Does our member already have a friend matching this description?
1606
1607                 $r = q("SELECT `id` FROM `contact` WHERE `name` = '%s' AND `nurl` = '%s' AND `uid` = %d LIMIT 1",
1608                         dbesc($suggest["name"]),
1609                         dbesc(normalise_link($suggest["url"])),
1610                         intval($suggest["uid"])
1611                 );
1612
1613                 if (dbm::is_result($r)) {
1614                         // Has already friend matching description
1615                         return false;
1616                 }
1617
1618                 // Do we already have an fcontact record for this person?
1619
1620                 $fid = 0;
1621                 $r = q("SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1622                         dbesc($suggest["url"]),
1623                         dbesc($suggest["name"]),
1624                         dbesc($suggest["request"])
1625                 );
1626                 if (dbm::is_result($r)) {
1627                         $fid = $r[0]["id"];
1628
1629                         // OK, we do. Do we already have an introduction for this person ?
1630                         $r = q("SELECT `id` FROM `intro` WHERE `uid` = %d AND `fid` = %d LIMIT 1",
1631                                 intval($suggest["uid"]),
1632                                 intval($fid)
1633                         );
1634                         /// @TODO Really abort on valid result??? Maybe missed ! here?
1635                         if (dbm::is_result($r)) {
1636                                 return false;
1637                         }
1638                 }
1639                 if (!$fid)
1640                         $r = q("INSERT INTO `fcontact` (`name`,`url`,`photo`,`request`) VALUES ('%s', '%s', '%s', '%s')",
1641                         dbesc($suggest["name"]),
1642                         dbesc($suggest["url"]),
1643                         dbesc($suggest["photo"]),
1644                         dbesc($suggest["request"])
1645                 );
1646                 $r = q("SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1647                         dbesc($suggest["url"]),
1648                         dbesc($suggest["name"]),
1649                         dbesc($suggest["request"])
1650                 );
1651                 if (dbm::is_result($r)) {
1652                         $fid = $r[0]["id"];
1653                 } else {
1654                         // database record did not get created. Quietly give up.
1655                         killme();
1656                 }
1657
1658
1659                 $hash = random_string();
1660
1661                 $r = q("INSERT INTO `intro` (`uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked`)
1662                         VALUES(%d, %d, %d, '%s', '%s', '%s', %d)",
1663                         intval($suggest["uid"]),
1664                         intval($fid),
1665                         intval($suggest["cid"]),
1666                         dbesc($suggest["body"]),
1667                         dbesc($hash),
1668                         dbesc(datetime_convert()),
1669                         intval(0)
1670                 );
1671
1672                 notification(array(
1673                         "type"         => NOTIFY_SUGGEST,
1674                         "notify_flags" => $importer["notify-flags"],
1675                         "language"     => $importer["language"],
1676                         "to_name"      => $importer["username"],
1677                         "to_email"     => $importer["email"],
1678                         "uid"          => $importer["importer_uid"],
1679                         "item"         => $suggest,
1680                         "link"         => App::get_baseurl()."/notifications/intros",
1681                         "source_name"  => $importer["name"],
1682                         "source_link"  => $importer["url"],
1683                         "source_photo" => $importer["photo"],
1684                         "verb"         => ACTIVITY_REQ_FRIEND,
1685                         "otype"        => "intro"
1686                 ));
1687
1688                 return true;
1689
1690         }
1691
1692         /**
1693          * @brief Processes the relocation elements
1694          *
1695          * @param object $xpath XPath object
1696          * @param object $relocation relocation elements
1697          * @param array $importer Record of the importer user mixed with contact of the content
1698          * @todo Find good type-hints for all parameter
1699          */
1700         private static function process_relocation($xpath, $relocation, $importer) {
1701
1702                 logger("Processing relocations");
1703
1704                 /// @TODO Rewrite this to one statement
1705                 $relocate = array();
1706                 $relocate["uid"] = $importer["importer_uid"];
1707                 $relocate["cid"] = $importer["id"];
1708                 $relocate["url"] = $xpath->query("dfrn:url/text()", $relocation)->item(0)->nodeValue;
1709                 $relocate["addr"] = $xpath->query("dfrn:addr/text()", $relocation)->item(0)->nodeValue;
1710                 $relocate["name"] = $xpath->query("dfrn:name/text()", $relocation)->item(0)->nodeValue;
1711                 $relocate["avatar"] = $xpath->query("dfrn:avatar/text()", $relocation)->item(0)->nodeValue;
1712                 $relocate["photo"] = $xpath->query("dfrn:photo/text()", $relocation)->item(0)->nodeValue;
1713                 $relocate["thumb"] = $xpath->query("dfrn:thumb/text()", $relocation)->item(0)->nodeValue;
1714                 $relocate["micro"] = $xpath->query("dfrn:micro/text()", $relocation)->item(0)->nodeValue;
1715                 $relocate["request"] = $xpath->query("dfrn:request/text()", $relocation)->item(0)->nodeValue;
1716                 $relocate["confirm"] = $xpath->query("dfrn:confirm/text()", $relocation)->item(0)->nodeValue;
1717                 $relocate["notify"] = $xpath->query("dfrn:notify/text()", $relocation)->item(0)->nodeValue;
1718                 $relocate["poll"] = $xpath->query("dfrn:poll/text()", $relocation)->item(0)->nodeValue;
1719                 $relocate["sitepubkey"] = $xpath->query("dfrn:sitepubkey/text()", $relocation)->item(0)->nodeValue;
1720
1721                 if (($relocate["avatar"] == "") AND ($relocate["photo"] != "")) {
1722                         $relocate["avatar"] = $relocate["photo"];
1723                 }
1724
1725                 if ($relocate["addr"] == "") {
1726                         $relocate["addr"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$3@$2", $relocate["url"]);
1727                 }
1728
1729                 // update contact
1730                 $r = q("SELECT `photo`, `url` FROM `contact` WHERE `id` = %d AND `uid` = %d;",
1731                         intval($importer["id"]),
1732                         intval($importer["importer_uid"]));
1733
1734                 if (!dbm::is_result($r)) {
1735                         /// @todo Don't die quietly
1736                         killme();
1737                 }
1738
1739                 $old = $r[0];
1740
1741                 // Update the gcontact entry
1742                 $relocate["server_url"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $relocate["url"]);
1743
1744                 $x = q("UPDATE `gcontact` SET
1745                                         `name` = '%s',
1746                                         `photo` = '%s',
1747                                         `url` = '%s',
1748                                         `nurl` = '%s',
1749                                         `addr` = '%s',
1750                                         `connect` = '%s',
1751                                         `notify` = '%s',
1752                                         `server_url` = '%s'
1753                         WHERE `nurl` = '%s';",
1754                                         dbesc($relocate["name"]),
1755                                         dbesc($relocate["avatar"]),
1756                                         dbesc($relocate["url"]),
1757                                         dbesc(normalise_link($relocate["url"])),
1758                                         dbesc($relocate["addr"]),
1759                                         dbesc($relocate["addr"]),
1760                                         dbesc($relocate["notify"]),
1761                                         dbesc($relocate["server_url"]),
1762                                         dbesc(normalise_link($old["url"])));
1763
1764                 // Update the contact table. We try to find every entry.
1765                 $x = q("UPDATE `contact` SET
1766                                         `name` = '%s',
1767                                         `avatar` = '%s',
1768                                         `url` = '%s',
1769                                         `nurl` = '%s',
1770                                         `addr` = '%s',
1771                                         `request` = '%s',
1772                                         `confirm` = '%s',
1773                                         `notify` = '%s',
1774                                         `poll` = '%s',
1775                                         `site-pubkey` = '%s'
1776                         WHERE (`id` = %d AND `uid` = %d) OR (`nurl` = '%s');",
1777                                         dbesc($relocate["name"]),
1778                                         dbesc($relocate["avatar"]),
1779                                         dbesc($relocate["url"]),
1780                                         dbesc(normalise_link($relocate["url"])),
1781                                         dbesc($relocate["addr"]),
1782                                         dbesc($relocate["request"]),
1783                                         dbesc($relocate["confirm"]),
1784                                         dbesc($relocate["notify"]),
1785                                         dbesc($relocate["poll"]),
1786                                         dbesc($relocate["sitepubkey"]),
1787                                         intval($importer["id"]),
1788                                         intval($importer["importer_uid"]),
1789                                         dbesc(normalise_link($old["url"])));
1790
1791                 update_contact_avatar($relocate["avatar"], $importer["importer_uid"], $importer["id"], true);
1792
1793                 if ($x === false) {
1794                         return false;
1795                 }
1796
1797                 // update items
1798                 /// @todo This is an extreme performance killer
1799                 $fields = array(
1800                         'owner-link' => array($old["url"], $relocate["url"]),
1801                         'author-link' => array($old["url"], $relocate["url"]),
1802                         //'owner-avatar' => array($old["photo"], $relocate["photo"]),
1803                         //'author-avatar' => array($old["photo"], $relocate["photo"]),
1804                         );
1805                 foreach ($fields as $n=>$f) {
1806                         $r = q("SELECT `id` FROM `item` WHERE `%s` = '%s' AND `uid` = %d LIMIT 1",
1807                                         $n, dbesc($f[0]),
1808                                         intval($importer["importer_uid"]));
1809
1810                         if (dbm::is_result($r)) {
1811                                 $x = q("UPDATE `item` SET `%s` = '%s' WHERE `%s` = '%s' AND `uid` = %d",
1812                                                 $n, dbesc($f[1]),
1813                                                 $n, dbesc($f[0]),
1814                                                 intval($importer["importer_uid"]));
1815
1816                                 if ($x === false) {
1817                                         return false;
1818                                 }
1819                         }
1820                 }
1821
1822                 /// @TODO
1823                 /// merge with current record, current contents have priority
1824                 /// update record, set url-updated
1825                 /// update profile photos
1826                 /// schedule a scan?
1827                 return true;
1828         }
1829
1830         /**
1831          * @brief Updates an item
1832          *
1833          * @param array $current the current item record
1834          * @param array $item the new item record
1835          * @param array $importer Record of the importer user mixed with contact of the content
1836          * @param int $entrytype Is it a toplevel entry, a comment or a relayed comment?
1837          */
1838         private static function update_content($current, $item, $importer, $entrytype) {
1839                 $changed = false;
1840
1841                 if (edited_timestamp_is_newer($current, $item)) {
1842
1843                         // do not accept (ignore) an earlier edit than one we currently have.
1844                         if (datetime_convert("UTC","UTC",$item["edited"]) < $current["edited"])
1845                                 return(false);
1846
1847                         $r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s', `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d",
1848                                 dbesc($item["title"]),
1849                                 dbesc($item["body"]),
1850                                 dbesc($item["tag"]),
1851                                 dbesc(datetime_convert("UTC","UTC",$item["edited"])),
1852                                 dbesc(datetime_convert()),
1853                                 dbesc($item["uri"]),
1854                                 intval($importer["importer_uid"])
1855                         );
1856                         create_tags_from_itemuri($item["uri"], $importer["importer_uid"]);
1857                         update_thread_uri($item["uri"], $importer["importer_uid"]);
1858
1859                         $changed = true;
1860
1861                         if ($entrytype == DFRN_REPLY_RC) {
1862                                 proc_run(PRIORITY_HIGH, "include/notifier.php","comment-import", $current["id"]);
1863                         }
1864                 }
1865
1866                 // update last-child if it changes
1867                 if ($item["last-child"] AND ($item["last-child"] != $current["last-child"])) {
1868                         $r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
1869                                 dbesc(datetime_convert()),
1870                                 dbesc($item["parent-uri"]),
1871                                 intval($importer["importer_uid"])
1872                         );
1873                         $r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d",
1874                                 intval($item["last-child"]),
1875                                 dbesc(datetime_convert()),
1876                                 dbesc($item["uri"]),
1877                                 intval($importer["importer_uid"])
1878                         );
1879                 }
1880                 return $changed;
1881         }
1882
1883         /**
1884          * @brief Detects the entry type of the item
1885          *
1886          * @param array $importer Record of the importer user mixed with contact of the content
1887          * @param array $item the new item record
1888          *
1889          * @return int Is it a toplevel entry, a comment or a relayed comment?
1890          */
1891         private static function get_entry_type($importer, $item) {
1892                 if ($item["parent-uri"] != $item["uri"]) {
1893                         $community = false;
1894
1895                         if ($importer["page-flags"] == PAGE_COMMUNITY || $importer["page-flags"] == PAGE_PRVGROUP) {
1896                                 $sql_extra = "";
1897                                 $community = true;
1898                                 logger("possible community action");
1899                         } else {
1900                                 $sql_extra = " AND `contact`.`self` AND `item`.`wall` ";
1901                         }
1902
1903                         // was the top-level post for this action written by somebody on this site?
1904                         // Specifically, the recipient?
1905
1906                         $is_a_remote_action = false;
1907
1908                         $r = q("SELECT `item`.`parent-uri` FROM `item`
1909                                 WHERE `item`.`uri` = '%s'
1910                                 LIMIT 1",
1911                                 dbesc($item["parent-uri"])
1912                         );
1913                         if (dbm::is_result($r)) {
1914                                 $r = q("SELECT `item`.`forum_mode`, `item`.`wall` FROM `item`
1915                                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
1916                                         WHERE `item`.`uri` = '%s' AND (`item`.`parent-uri` = '%s' OR `item`.`thr-parent` = '%s')
1917                                         AND `item`.`uid` = %d
1918                                         $sql_extra
1919                                         LIMIT 1",
1920                                         dbesc($r[0]["parent-uri"]),
1921                                         dbesc($r[0]["parent-uri"]),
1922                                         dbesc($r[0]["parent-uri"]),
1923                                         intval($importer["importer_uid"])
1924                                 );
1925                                 if (dbm::is_result($r)) {
1926                                         $is_a_remote_action = true;
1927                                 }
1928                         }
1929
1930                         // Does this have the characteristics of a community or private group action?
1931                         // If it's an action to a wall post on a community/prvgroup page it's a
1932                         // valid community action. Also forum_mode makes it valid for sure.
1933                         // If neither, it's not.
1934
1935                         if ($is_a_remote_action && $community) {
1936                                 if ((!$r[0]["forum_mode"]) && (!$r[0]["wall"])) {
1937                                         $is_a_remote_action = false;
1938                                         logger("not a community action");
1939                                 }
1940                         }
1941
1942                         if ($is_a_remote_action) {
1943                                 return DFRN_REPLY_RC;
1944                         } else {
1945                                 return DFRN_REPLY;
1946                         }
1947
1948                 } else {
1949                         return DFRN_TOP_LEVEL;
1950                 }
1951
1952         }
1953
1954         /**
1955          * @brief Send a "poke"
1956          *
1957          * @param array $item the new item record
1958          * @param array $importer Record of the importer user mixed with contact of the content
1959          * @param int $posted_id The record number of item record that was just posted
1960          */
1961         private static function do_poke($item, $importer, $posted_id) {
1962                 $verb = urldecode(substr($item["verb"],strpos($item["verb"], "#")+1));
1963                 if (!$verb) {
1964                         return;
1965                 }
1966                 $xo = parse_xml_string($item["object"],false);
1967
1968                 if (($xo->type == ACTIVITY_OBJ_PERSON) && ($xo->id)) {
1969
1970                         // somebody was poked/prodded. Was it me?
1971                         foreach ($xo->link as $l) {
1972                                 $atts = $l->attributes();
1973                                 switch($atts["rel"]) {
1974                                         case "alternate":
1975                                                 $Blink = $atts["href"];
1976                                                 break;
1977                                         default:
1978                                                 break;
1979                                 }
1980                         }
1981
1982                         if ($Blink && link_compare($Blink,App::get_baseurl()."/profile/".$importer["nickname"])) {
1983
1984                                 // send a notification
1985                                 notification(array(
1986                                         "type"         => NOTIFY_POKE,
1987                                         "notify_flags" => $importer["notify-flags"],
1988                                         "language"     => $importer["language"],
1989                                         "to_name"      => $importer["username"],
1990                                         "to_email"     => $importer["email"],
1991                                         "uid"          => $importer["importer_uid"],
1992                                         "item"         => $item,
1993                                         "link"         => App::get_baseurl()."/display/".urlencode(get_item_guid($posted_id)),
1994                                         "source_name"  => stripslashes($item["author-name"]),
1995                                         "source_link"  => $item["author-link"],
1996                                         "source_photo" => ((link_compare($item["author-link"],$importer["url"]))
1997                                                 ? $importer["thumb"] : $item["author-avatar"]),
1998                                         "verb"         => $item["verb"],
1999                                         "otype"        => "person",
2000                                         "activity"     => $verb,
2001                                         "parent"       => $item["parent"]
2002                                 ));
2003                         }
2004                 }
2005         }
2006
2007         /**
2008          * @brief Processes several actions, depending on the verb
2009          *
2010          * @param int $entrytype Is it a toplevel entry, a comment or a relayed comment?
2011          * @param array $importer Record of the importer user mixed with contact of the content
2012          * @param array $item the new item record
2013          * @param bool $is_like Is the verb a "like"?
2014          *
2015          * @return bool Should the processing of the entries be continued?
2016          */
2017         private static function process_verbs($entrytype, $importer, &$item, &$is_like) {
2018
2019                 logger("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, LOGGER_DEBUG);
2020
2021                 if (($entrytype == DFRN_TOP_LEVEL)) {
2022                         // The filling of the the "contact" variable is done for legcy reasons
2023                         // The functions below are partly used by ostatus.php as well - where we have this variable
2024                         $r = q("SELECT * FROM `contact` WHERE `id` = %d", intval($importer["id"]));
2025                         $contact = $r[0];
2026                         $nickname = $contact["nick"];
2027
2028                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
2029                         // This function once was responsible for DFRN and OStatus.
2030                         if (activity_match($item["verb"],ACTIVITY_FOLLOW)) {
2031                                 logger("New follower");
2032                                 new_follower($importer, $contact, $item, $nickname);
2033                                 return false;
2034                         }
2035                         if (activity_match($item["verb"],ACTIVITY_UNFOLLOW))  {
2036                                 logger("Lost follower");
2037                                 lose_follower($importer, $contact, $item);
2038                                 return false;
2039                         }
2040                         if (activity_match($item["verb"],ACTIVITY_REQ_FRIEND)) {
2041                                 logger("New friend request");
2042                                 new_follower($importer, $contact, $item, $nickname, true);
2043                                 return false;
2044                         }
2045                         if (activity_match($item["verb"],ACTIVITY_UNFRIEND))  {
2046                                 logger("Lost sharer");
2047                                 lose_sharer($importer, $contact, $item);
2048                                 return false;
2049                         }
2050                 } else {
2051                         if (($item["verb"] == ACTIVITY_LIKE)
2052                                 || ($item["verb"] == ACTIVITY_DISLIKE)
2053                                 || ($item["verb"] == ACTIVITY_ATTEND)
2054                                 || ($item["verb"] == ACTIVITY_ATTENDNO)
2055                                 || ($item["verb"] == ACTIVITY_ATTENDMAYBE)) {
2056                                 $is_like = true;
2057                                 $item["type"] = "activity";
2058                                 $item["gravity"] = GRAVITY_LIKE;
2059                                 // only one like or dislike per person
2060                                 // splitted into two queries for performance issues
2061                                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `parent-uri` = '%s' AND NOT `deleted` LIMIT 1",
2062                                         intval($item["uid"]),
2063                                         dbesc($item["author-link"]),
2064                                         dbesc($item["verb"]),
2065                                         dbesc($item["parent-uri"])
2066                                 );
2067                                 if (dbm::is_result($r)) {
2068                                         return false;
2069                                 }
2070
2071                                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `thr-parent` = '%s' AND NOT `deleted` LIMIT 1",
2072                                         intval($item["uid"]),
2073                                         dbesc($item["author-link"]),
2074                                         dbesc($item["verb"]),
2075                                         dbesc($item["parent-uri"])
2076                                 );
2077                                 if (dbm::is_result($r)) {
2078                                         return false;
2079                                 }
2080                         } else {
2081                                 $is_like = false;
2082                         }
2083
2084                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2085
2086                                 $xo = parse_xml_string($item["object"],false);
2087                                 $xt = parse_xml_string($item["target"],false);
2088
2089                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2090                                         $r = q("SELECT `id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2091                                                 dbesc($xt->id),
2092                                                 intval($importer["importer_uid"])
2093                                         );
2094
2095                                         if (!dbm::is_result($r)) {
2096                                                 killme();
2097                                         }
2098
2099                                         // extract tag, if not duplicate, add to parent item
2100                                         if ($xo->content) {
2101                                                 if (!(stristr($r[0]["tag"],trim($xo->content)))) {
2102                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2103                                                                 dbesc($r[0]["tag"] . (strlen($r[0]["tag"]) ? ',' : '') . '#[url=' . $xo->id . ']'. $xo->content . '[/url]'),
2104                                                                 intval($r[0]["id"])
2105                                                         );
2106                                                         create_tags_from_item($r[0]["id"]);
2107                                                 }
2108                                         }
2109                                 }
2110                         }
2111                 }
2112                 return true;
2113         }
2114
2115         /**
2116          * @brief Processes the link elements
2117          *
2118          * @param object $links link elements
2119          * @param array $item the item record
2120          * @todo Add type-hints
2121          */
2122         private static function parse_links($links, &$item) {
2123                 $rel = "";
2124                 $href = "";
2125                 $type = "";
2126                 $length = "0";
2127                 $title = "";
2128                 foreach ($links AS $link) {
2129                         foreach ($link->attributes AS $attributes) {
2130                                 /// @TODO Rewrite these repeated (same) if () statements to a switch()
2131                                 if ($attributes->name == "href") {
2132                                         $href = $attributes->textContent;
2133                                 }
2134                                 if ($attributes->name == "rel") {
2135                                         $rel = $attributes->textContent;
2136                                 }
2137                                 if ($attributes->name == "type") {
2138                                         $type = $attributes->textContent;
2139                                 }
2140                                 if ($attributes->name == "length") {
2141                                         $length = $attributes->textContent;
2142                                 }
2143                                 if ($attributes->name == "title") {
2144                                         $title = $attributes->textContent;
2145                                 }
2146                         }
2147                         if (($rel != "") AND ($href != ""))
2148                                 switch($rel) {
2149                                         case "alternate":
2150                                                 $item["plink"] = $href;
2151                                                 break;
2152                                         case "enclosure":
2153                                                 $enclosure = $href;
2154                                                 if (strlen($item["attach"])) {
2155                                                         $item["attach"] .= ",";
2156                                                 }
2157
2158                                                 $item["attach"] .= '[attach]href="'.$href.'" length="'.$length.'" type="'.$type.'" title="'.$title.'"[/attach]';
2159                                                 break;
2160                                 }
2161                 }
2162         }
2163
2164         /**
2165          * @brief Processes the entry elements which contain the items and comments
2166          *
2167          * @param array $header Array of the header elements that always stay the same
2168          * @param object $xpath XPath object
2169          * @param object $entry entry elements
2170          * @param array $importer Record of the importer user mixed with contact of the content
2171          * @todo Add type-hints
2172          */
2173         private static function process_entry($header, $xpath, $entry, $importer) {
2174
2175                 logger("Processing entries");
2176
2177                 $item = $header;
2178
2179                 // Get the uri
2180                 $item["uri"] = $xpath->query("atom:id/text()", $entry)->item(0)->nodeValue;
2181
2182                 $item["edited"] = $xpath->query("atom:updated/text()", $entry)->item(0)->nodeValue;
2183
2184                 $current = q("SELECT `id`, `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2185                         dbesc($item["uri"]),
2186                         intval($importer["importer_uid"])
2187                 );
2188
2189                 // Is there an existing item?
2190                 if (dbm::is_result($current) AND edited_timestamp_is_newer($current[0], $item) AND
2191                         (datetime_convert("UTC","UTC",$item["edited"]) < $current[0]["edited"])) {
2192                         logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2193                         return;
2194                 }
2195
2196                 // Fetch the owner
2197                 $owner = self::fetchauthor($xpath, $entry, $importer, "dfrn:owner", true);
2198
2199                 $item["owner-name"] = $owner["name"];
2200                 $item["owner-link"] = $owner["link"];
2201                 $item["owner-avatar"] = $owner["avatar"];
2202
2203                 // fetch the author
2204                 $author = self::fetchauthor($xpath, $entry, $importer, "atom:author", true);
2205
2206                 $item["author-name"] = $author["name"];
2207                 $item["author-link"] = $author["link"];
2208                 $item["author-avatar"] = $author["avatar"];
2209
2210                 $item["title"] = $xpath->query("atom:title/text()", $entry)->item(0)->nodeValue;
2211
2212                 $item["created"] = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2213
2214                 $item["body"] = $xpath->query("dfrn:env/text()", $entry)->item(0)->nodeValue;
2215                 $item["body"] = str_replace(array(' ',"\t","\r","\n"), array('','','',''),$item["body"]);
2216                 // make sure nobody is trying to sneak some html tags by us
2217                 $item["body"] = notags(base64url_decode($item["body"]));
2218
2219                 $item["body"] = limit_body_size($item["body"]);
2220
2221                 /// @todo Do we really need this check for HTML elements? (It was copied from the old function)
2222                 if ((strpos($item['body'],'<') !== false) && (strpos($item['body'],'>') !== false)) {
2223
2224                         $item['body'] = reltoabs($item['body'],$base_url);
2225
2226                         $item['body'] = html2bb_video($item['body']);
2227
2228                         $item['body'] = oembed_html2bbcode($item['body']);
2229
2230                         $config = HTMLPurifier_Config::createDefault();
2231                         $config->set('Cache.DefinitionImpl', null);
2232
2233                         // we shouldn't need a whitelist, because the bbcode converter
2234                         // will strip out any unsupported tags.
2235
2236                         $purifier = new HTMLPurifier($config);
2237                         $item['body'] = $purifier->purify($item['body']);
2238
2239                         $item['body'] = @html2bbcode($item['body']);
2240                 }
2241
2242                 /// @todo We should check for a repeated post and if we know the repeated author.
2243
2244                 // We don't need the content element since "dfrn:env" is always present
2245                 //$item["body"] = $xpath->query("atom:content/text()", $entry)->item(0)->nodeValue;
2246
2247                 $item["last-child"] = $xpath->query("dfrn:comment-allow/text()", $entry)->item(0)->nodeValue;
2248                 $item["location"] = $xpath->query("dfrn:location/text()", $entry)->item(0)->nodeValue;
2249
2250                 $georsspoint = $xpath->query("georss:point", $entry);
2251                 if ($georsspoint) {
2252                         $item["coord"] = $georsspoint->item(0)->nodeValue;
2253                 }
2254
2255                 $item["private"] = $xpath->query("dfrn:private/text()", $entry)->item(0)->nodeValue;
2256
2257                 $item["extid"] = $xpath->query("dfrn:extid/text()", $entry)->item(0)->nodeValue;
2258
2259                 if ($xpath->query("dfrn:bookmark/text()", $entry)->item(0)->nodeValue == "true") {
2260                         $item["bookmark"] = true;
2261                 }
2262
2263                 $notice_info = $xpath->query("statusnet:notice_info", $entry);
2264                 if ($notice_info AND ($notice_info->length > 0)) {
2265                         foreach ($notice_info->item(0)->attributes AS $attributes) {
2266                                 if ($attributes->name == "source") {
2267                                         $item["app"] = strip_tags($attributes->textContent);
2268                                 }
2269                         }
2270                 }
2271
2272                 $item["guid"] = $xpath->query("dfrn:diaspora_guid/text()", $entry)->item(0)->nodeValue;
2273
2274                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "item_store"
2275                 $dsprsig = unxmlify($xpath->query("dfrn:diaspora_signature/text()", $entry)->item(0)->nodeValue);
2276                 if ($dsprsig != "") {
2277                         $item["dsprsig"] = $dsprsig;
2278                 }
2279
2280                 $item["verb"] = $xpath->query("activity:verb/text()", $entry)->item(0)->nodeValue;
2281
2282                 if ($xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue != "") {
2283                         $item["object-type"] = $xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue;
2284                 }
2285
2286                 $object = $xpath->query("activity:object", $entry)->item(0);
2287                 $item["object"] = self::transform_activity($xpath, $object, "object");
2288
2289                 if (trim($item["object"]) != "") {
2290                         $r = parse_xml_string($item["object"], false);
2291                         if (isset($r->type)) {
2292                                 $item["object-type"] = $r->type;
2293                         }
2294                 }
2295
2296                 $target = $xpath->query("activity:target", $entry)->item(0);
2297                 $item["target"] = self::transform_activity($xpath, $target, "target");
2298
2299                 $categories = $xpath->query("atom:category", $entry);
2300                 if ($categories) {
2301                         foreach ($categories AS $category) {
2302                                 $term = "";
2303                                 $scheme = "";
2304                                 foreach ($category->attributes AS $attributes) {
2305                                         if ($attributes->name == "term") {
2306                                                 $term = $attributes->textContent;
2307                                         }
2308
2309                                         if ($attributes->name == "scheme") {
2310                                                 $scheme = $attributes->textContent;
2311                                         }
2312                                 }
2313
2314                                 if (($term != "") AND ($scheme != "")) {
2315                                         $parts = explode(":", $scheme);
2316                                         if ((count($parts) >= 4) AND (array_shift($parts) == "X-DFRN")) {
2317                                                 $termhash = array_shift($parts);
2318                                                 $termurl = implode(":", $parts);
2319
2320                                                 if (strlen($item["tag"])) {
2321                                                         $item["tag"] .= ",";
2322                                                 }
2323
2324                                                 $item["tag"] .= $termhash."[url=".$termurl."]".$term."[/url]";
2325                                         }
2326                                 }
2327                         }
2328                 }
2329
2330                 $enclosure = "";
2331
2332                 $links = $xpath->query("atom:link", $entry);
2333                 if ($links) {
2334                         self::parse_links($links, $item);
2335                 }
2336
2337                 // Is it a reply or a top level posting?
2338                 $item["parent-uri"] = $item["uri"];
2339
2340                 $inreplyto = $xpath->query("thr:in-reply-to", $entry);
2341                 if (is_object($inreplyto->item(0))) {
2342                         foreach ($inreplyto->item(0)->attributes AS $attributes) {
2343                                 if ($attributes->name == "ref") {
2344                                         $item["parent-uri"] = $attributes->textContent;
2345                                 }
2346                         }
2347                 }
2348
2349                 // Get the type of the item (Top level post, reply or remote reply)
2350                 $entrytype = self::get_entry_type($importer, $item);
2351
2352                 // Now assign the rest of the values that depend on the type of the message
2353                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2354                         if (!isset($item["object-type"])) {
2355                                 $item["object-type"] = ACTIVITY_OBJ_COMMENT;
2356                         }
2357
2358                         if ($item["contact-id"] != $owner["contact-id"]) {
2359                                 $item["contact-id"] = $owner["contact-id"];
2360                         }
2361
2362                         if (($item["network"] != $owner["network"]) AND ($owner["network"] != "")) {
2363                                 $item["network"] = $owner["network"];
2364                         }
2365
2366                         if ($item["contact-id"] != $author["contact-id"]) {
2367                                 $item["contact-id"] = $author["contact-id"];
2368                         }
2369
2370                         if (($item["network"] != $author["network"]) AND ($author["network"] != "")) {
2371                                 $item["network"] = $author["network"];
2372                         }
2373
2374                         // This code was taken from the old DFRN code
2375                         // When activated, forums don't work.
2376                         // And: Why should we disallow commenting by followers?
2377                         // the behaviour is now similar to the Diaspora part.
2378                         //if ($importer["rel"] == CONTACT_IS_FOLLOWER) {
2379                         //      logger("Contact ".$importer["id"]." is only follower. Quitting", LOGGER_DEBUG);
2380                         //      return;
2381                         //}
2382                 }
2383
2384                 if ($entrytype == DFRN_REPLY_RC) {
2385                         $item["type"] = "remote-comment";
2386                         $item["wall"] = 1;
2387                 } elseif ($entrytype == DFRN_TOP_LEVEL) {
2388                         if (!isset($item["object-type"])) {
2389                                 $item["object-type"] = ACTIVITY_OBJ_NOTE;
2390                         }
2391
2392                         // Is it an event?
2393                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2394                                 logger("Item ".$item["uri"]." seems to contain an event.", LOGGER_DEBUG);
2395                                 $ev = bbtoevent($item["body"]);
2396                                 if ((x($ev, "desc") || x($ev, "summary")) && x($ev, "start")) {
2397                                         logger("Event in item ".$item["uri"]." was found.", LOGGER_DEBUG);
2398                                         $ev["cid"] = $importer["id"];
2399                                         $ev["uid"] = $importer["uid"];
2400                                         $ev["uri"] = $item["uri"];
2401                                         $ev["edited"] = $item["edited"];
2402                                         $ev['private'] = $item['private'];
2403                                         $ev["guid"] = $item["guid"];
2404
2405                                         $r = q("SELECT `id` FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2406                                                 dbesc($item["uri"]),
2407                                                 intval($importer["uid"])
2408                                         );
2409                                         if (dbm::is_result($r)) {
2410                                                 $ev["id"] = $r[0]["id"];
2411                                         }
2412
2413                                         $event_id = event_store($ev);
2414                                         logger("Event ".$event_id." was stored", LOGGER_DEBUG);
2415                                         return;
2416                                 }
2417                         }
2418                 }
2419
2420                 if (!self::process_verbs($entrytype, $importer, $item, $is_like)) {
2421                         logger("Exiting because 'process_verbs' told us so", LOGGER_DEBUG);
2422                         return;
2423                 }
2424
2425                 // Update content if 'updated' changes
2426                 if (dbm::is_result($current)) {
2427                         if (self::update_content($r[0], $item, $importer, $entrytype))
2428                                 logger("Item ".$item["uri"]." was updated.", LOGGER_DEBUG);
2429                         } else {
2430                                 logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2431                         }
2432                         return;
2433                 }
2434
2435                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2436                         $posted_id = item_store($item);
2437                         $parent = 0;
2438
2439                         if ($posted_id) {
2440
2441                                 logger("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, LOGGER_DEBUG);
2442
2443                                 $item["id"] = $posted_id;
2444
2445                                 $r = q("SELECT `parent`, `parent-uri` FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
2446                                         intval($posted_id),
2447                                         intval($importer["importer_uid"])
2448                                 );
2449                                 if (dbm::is_result($r)) {
2450                                         $parent = $r[0]["parent"];
2451                                         $parent_uri = $r[0]["parent-uri"];
2452                                 }
2453
2454                                 if (!$is_like) {
2455                                         $r1 = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `uid` = %d AND `parent` = %d",
2456                                                 dbesc(datetime_convert()),
2457                                                 intval($importer["importer_uid"]),
2458                                                 intval($r[0]["parent"])
2459                                         );
2460
2461                                         $r2 = q("UPDATE `item` SET `last-child` = 1, `changed` = '%s' WHERE `uid` = %d AND `id` = %d",
2462                                                 dbesc(datetime_convert()),
2463                                                 intval($importer["importer_uid"]),
2464                                                 intval($posted_id)
2465                                         );
2466                                 }
2467
2468                                 if ($posted_id AND $parent AND ($entrytype == DFRN_REPLY_RC)) {
2469                                         logger("Notifying followers about comment ".$posted_id, LOGGER_DEBUG);
2470                                         proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $posted_id);
2471                                 }
2472
2473                                 return true;
2474                         }
2475                 } else { // $entrytype == DFRN_TOP_LEVEL
2476                         if (!link_compare($item["owner-link"],$importer["url"])) {
2477                                 // The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery,
2478                                 // but otherwise there's a possible data mixup on the sender's system.
2479                                 // the tgroup delivery code called from item_store will correct it if it's a forum,
2480                                 // but we're going to unconditionally correct it here so that the post will always be owned by our contact.
2481                                 logger('Correcting item owner.', LOGGER_DEBUG);
2482                                 $item["owner-name"]   = $importer["senderName"];
2483                                 $item["owner-link"]   = $importer["url"];
2484                                 $item["owner-avatar"] = $importer["thumb"];
2485                         }
2486
2487                         if (($importer["rel"] == CONTACT_IS_FOLLOWER) && (!tgroup_check($importer["importer_uid"], $item))) {
2488                                 logger("Contact ".$importer["id"]." is only follower and tgroup check was negative.", LOGGER_DEBUG);
2489                                 return;
2490                         }
2491
2492                         // This is my contact on another system, but it's really me.
2493                         // Turn this into a wall post.
2494                         $notify = item_is_remote_self($importer, $item);
2495
2496                         $posted_id = item_store($item, false, $notify);
2497
2498                         logger("Item was stored with id ".$posted_id, LOGGER_DEBUG);
2499
2500                         if (stristr($item["verb"],ACTIVITY_POKE))
2501                                 self::do_poke($item, $importer, $posted_id);
2502                 }
2503         }
2504
2505         /**
2506          * @brief Deletes items
2507          *
2508          * @param object $xpath XPath object
2509          * @param object $deletion deletion elements
2510          * @param array $importer Record of the importer user mixed with contact of the content
2511          */
2512         private static function process_deletion($xpath, $deletion, $importer) {
2513
2514                 logger("Processing deletions");
2515
2516                 foreach ($deletion->attributes AS $attributes) {
2517                         if ($attributes->name == "ref") {
2518                                 $uri = $attributes->textContent;
2519                         }
2520                         if ($attributes->name == "when") {
2521                                 $when = $attributes->textContent;
2522                         }
2523                 }
2524                 if ($when) {
2525                         $when = datetime_convert("UTC", "UTC", $when, "Y-m-d H:i:s");
2526                 } else {
2527                         $when = datetime_convert("UTC", "UTC", "now", "Y-m-d H:i:s");
2528                 }
2529
2530                 if (!$uri OR !$importer["id"]) {
2531                         return false;
2532                 }
2533
2534                 /// @todo Only select the used fields
2535                 $r = q("SELECT `item`.*, `contact`.`self` FROM `item` INNER JOIN `contact` on `item`.`contact-id` = `contact`.`id`
2536                                 WHERE `uri` = '%s' AND `item`.`uid` = %d AND `contact-id` = %d AND NOT `item`.`file` LIKE '%%[%%' LIMIT 1",
2537                                 dbesc($uri),
2538                                 intval($importer["uid"]),
2539                                 intval($importer["id"])
2540                         );
2541                 if (!dbm::is_result($r)) {
2542                         logger("Item with uri ".$uri." from contact ".$importer["id"]." for user ".$importer["uid"]." wasn't found.", LOGGER_DEBUG);
2543                         return;
2544                 } else {
2545
2546                         $item = $r[0];
2547
2548                         $entrytype = self::get_entry_type($importer, $item);
2549
2550                         if (!$item["deleted"]) {
2551                                 logger('deleting item '.$item["id"].' uri='.$uri, LOGGER_DEBUG);
2552                         } else {
2553                                 return;
2554                         }
2555
2556                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2557                                 logger("Deleting event ".$item["event-id"], LOGGER_DEBUG);
2558                                 event_delete($item["event-id"]);
2559                         }
2560
2561                         if (($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2562
2563                                 $xo = parse_xml_string($item["object"],false);
2564                                 $xt = parse_xml_string($item["target"],false);
2565
2566                                 if ($xt->type == ACTIVITY_OBJ_NOTE) {
2567                                         $i = q("SELECT `id`, `contact-id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2568                                                 dbesc($xt->id),
2569                                                 intval($importer["importer_uid"])
2570                                         );
2571                                         if (dbm::is_result($i)) {
2572
2573                                                 // For tags, the owner cannot remove the tag on the author's copy of the post.
2574
2575                                                 $owner_remove = (($item["contact-id"] == $i[0]["contact-id"]) ? true: false);
2576                                                 $author_remove = (($item["origin"] && $item["self"]) ? true : false);
2577                                                 $author_copy = (($item["origin"]) ? true : false);
2578
2579                                                 if ($owner_remove && $author_copy) {
2580                                                         return;
2581                                                 }
2582                                                 if ($author_remove || $owner_remove) {
2583                                                         $tags = explode(',',$i[0]["tag"]);
2584                                                         $newtags = array();
2585                                                         if (count($tags)) {
2586                                                                 foreach ($tags as $tag) {
2587                                                                         if (trim($tag) !== trim($xo->body)) {
2588                                                                                 $newtags[] = trim($tag);
2589                                                                         }
2590                                                                 }
2591                                                         }
2592                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2593                                                                 dbesc(implode(',',$newtags)),
2594                                                                 intval($i[0]["id"])
2595                                                         );
2596                                                         create_tags_from_item($i[0]["id"]);
2597                                                 }
2598                                         }
2599                                 }
2600                         }
2601
2602                         if ($entrytype == DFRN_TOP_LEVEL) {
2603                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2604                                                 `body` = '', `title` = ''
2605                                         WHERE `parent-uri` = '%s' AND `uid` = %d",
2606                                                 dbesc($when),
2607                                                 dbesc(datetime_convert()),
2608                                                 dbesc($uri),
2609                                                 intval($importer["uid"])
2610                                         );
2611                                 create_tags_from_itemuri($uri, $importer["uid"]);
2612                                 create_files_from_itemuri($uri, $importer["uid"]);
2613                                 update_thread_uri($uri, $importer["uid"]);
2614                         } else {
2615                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2616                                                 `body` = '', `title` = ''
2617                                         WHERE `uri` = '%s' AND `uid` = %d",
2618                                                 dbesc($when),
2619                                                 dbesc(datetime_convert()),
2620                                                 dbesc($uri),
2621                                                 intval($importer["uid"])
2622                                         );
2623                                 create_tags_from_itemuri($uri, $importer["uid"]);
2624                                 create_files_from_itemuri($uri, $importer["uid"]);
2625                                 update_thread_uri($uri, $importer["importer_uid"]);
2626                                 if ($item["last-child"]) {
2627                                         // ensure that last-child is set in case the comment that had it just got wiped.
2628                                         q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
2629                                                 dbesc(datetime_convert()),
2630                                                 dbesc($item["parent-uri"]),
2631                                                 intval($item["uid"])
2632                                         );
2633                                         // who is the last child now?
2634                                         $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `moderated` = 0 AND `uid` = %d
2635                                                 ORDER BY `created` DESC LIMIT 1",
2636                                                         dbesc($item["parent-uri"]),
2637                                                         intval($importer["uid"])
2638                                         );
2639                                         if (dbm::is_result($r)) {
2640                                                 q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d",
2641                                                         intval($r[0]["id"])
2642                                                 );
2643                                         }
2644                                 }
2645                                 // if this is a relayed delete, propagate it to other recipients
2646
2647                                 if ($entrytype == DFRN_REPLY_RC) {
2648                                         logger("Notifying followers about deletion of post ".$item["id"], LOGGER_DEBUG);
2649                                         proc_run(PRIORITY_HIGH, "include/notifier.php","drop", $item["id"]);
2650                                 }
2651                         }
2652                 }
2653         }
2654
2655         /**
2656          * @brief Imports a DFRN message
2657          *
2658          * @param text $xml The DFRN message
2659          * @param array $importer Record of the importer user mixed with contact of the content
2660          * @param bool $sort_by_date Is used when feeds are polled
2661          */
2662         public static function import($xml,$importer, $sort_by_date = false) {
2663
2664                 if ($xml == "")
2665                         return;
2666
2667                 if ($importer["readonly"]) {
2668                         // We aren't receiving stuff from this person. But we will quietly ignore them
2669                         // rather than a blatant "go away" message.
2670                         logger('ignoring contact '.$importer["id"]);
2671                         return;
2672                 }
2673
2674                 $doc = new DOMDocument();
2675                 @$doc->loadXML($xml);
2676
2677                 $xpath = new DomXPath($doc);
2678                 $xpath->registerNamespace("atom", NAMESPACE_ATOM1);
2679                 $xpath->registerNamespace("thr", NAMESPACE_THREAD);
2680                 $xpath->registerNamespace("at", NAMESPACE_TOMB);
2681                 $xpath->registerNamespace("media", NAMESPACE_MEDIA);
2682                 $xpath->registerNamespace("dfrn", NAMESPACE_DFRN);
2683                 $xpath->registerNamespace("activity", NAMESPACE_ACTIVITY);
2684                 $xpath->registerNamespace("georss", NAMESPACE_GEORSS);
2685                 $xpath->registerNamespace("poco", NAMESPACE_POCO);
2686                 $xpath->registerNamespace("ostatus", NAMESPACE_OSTATUS);
2687                 $xpath->registerNamespace("statusnet", NAMESPACE_STATUSNET);
2688
2689                 $header = array();
2690                 $header["uid"] = $importer["uid"];
2691                 $header["network"] = NETWORK_DFRN;
2692                 $header["type"] = "remote";
2693                 $header["wall"] = 0;
2694                 $header["origin"] = 0;
2695                 $header["contact-id"] = $importer["id"];
2696
2697                 // Update the contact table if the data has changed
2698
2699                 // The "atom:author" is only present in feeds
2700                 if ($xpath->query("/atom:feed/atom:author")->length > 0) {
2701                         self::fetchauthor($xpath, $doc->firstChild, $importer, "atom:author", false, $xml);
2702                 }
2703
2704                 // Only the "dfrn:owner" in the head section contains all data
2705                 if ($xpath->query("/atom:feed/dfrn:owner")->length > 0) {
2706                         self::fetchauthor($xpath, $doc->firstChild, $importer, "dfrn:owner", false, $xml);
2707                 }
2708
2709                 logger("Import DFRN message for user ".$importer["uid"]." from contact ".$importer["id"], LOGGER_DEBUG);
2710
2711                 // The account type is new since 3.5.1
2712                 if ($xpath->query("/atom:feed/dfrn:account_type")->length > 0) {
2713                         $accounttype = intval($xpath->evaluate("/atom:feed/dfrn:account_type/text()", $context)->item(0)->nodeValue);
2714
2715                         if ($accounttype != $importer["contact-type"]) {
2716                                 q("UPDATE `contact` SET `contact-type` = %d WHERE `id` = %d",
2717                                         intval($accounttype),
2718                                         intval($importer["id"])
2719                                 );
2720                         }
2721                 }
2722
2723                 // is it a public forum? Private forums aren't supported with this method
2724                 // This is deprecated since 3.5.1
2725                 $forum = intval($xpath->evaluate("/atom:feed/dfrn:community/text()", $context)->item(0)->nodeValue);
2726
2727                 if ($forum != $importer["forum"]) {
2728                         q("UPDATE `contact` SET `forum` = %d WHERE `forum` != %d AND `id` = %d",
2729                                 intval($forum), intval($forum),
2730                                 intval($importer["id"])
2731                         );
2732                 }
2733
2734                 $mails = $xpath->query("/atom:feed/dfrn:mail");
2735                 foreach ($mails AS $mail) {
2736                         self::process_mail($xpath, $mail, $importer);
2737                 }
2738
2739                 $suggestions = $xpath->query("/atom:feed/dfrn:suggest");
2740                 foreach ($suggestions AS $suggestion) {
2741                         self::process_suggestion($xpath, $suggestion, $importer);
2742                 }
2743
2744                 $relocations = $xpath->query("/atom:feed/dfrn:relocate");
2745                 foreach ($relocations AS $relocation) {
2746                         self::process_relocation($xpath, $relocation, $importer);
2747                 }
2748
2749                 $deletions = $xpath->query("/atom:feed/at:deleted-entry");
2750                 foreach ($deletions AS $deletion) {
2751                         self::process_deletion($xpath, $deletion, $importer);
2752                 }
2753
2754                 if (!$sort_by_date) {
2755                         $entries = $xpath->query("/atom:feed/atom:entry");
2756                         foreach ($entries AS $entry) {
2757                                 self::process_entry($header, $xpath, $entry, $importer);
2758                         }
2759                 } else {
2760                         $newentries = array();
2761                         $entries = $xpath->query("/atom:feed/atom:entry");
2762                         foreach ($entries AS $entry) {
2763                                 $created = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2764                                 $newentries[strtotime($created)] = $entry;
2765                         }
2766
2767                         // Now sort after the publishing date
2768                         ksort($newentries);
2769
2770                         foreach ($newentries AS $entry) {
2771                                 self::process_entry($header, $xpath, $entry, $importer);
2772                         }
2773                 }
2774                 logger("Import done for user ".$importer["uid"]." from contact ".$importer["id"], LOGGER_DEBUG);
2775         }
2776 }
2777 ?>