include/dfrn.php

   1 <?php
   2 /**
   3  * @file include/dfrn.php
   4  * @brief The implementation of the dfrn protocol
   5  *
   6  * https://github.com/friendica/friendica/wiki/Protocol
   7  */
   8
   9 require_once("include/Contact.php");
  10 require_once("include/ostatus.php");
  11 require_once("include/enotify.php");
  12 require_once("include/threads.php");
  13 require_once("include/socgraph.php");
  14 require_once("include/items.php");
  15 require_once("include/tags.php");
  16 require_once("include/files.php");
  17 require_once("include/event.php");
  18 require_once("include/text.php");
  19 require_once("include/oembed.php");
  20 require_once("include/html2bbcode.php");
  21 require_once("include/bbcode.php");
  22 require_once("include/xml.php");
  23
  24 /**
  25  * @brief This class contain functions to create and send DFRN XML files
  26  *
  27  */
  28 class dfrn {
  29
  30         const DFRN_TOP_LEVEL = 0;       // Top level posting
  31         const DFRN_REPLY = 1;           // Regular reply that is stored locally
  32         const DFRN_REPLY_RC = 2;        // Reply that will be relayed
  33
  34         /**
  35          * @brief Generates the atom entries for delivery.php
  36          *
  37          * This function is used whenever content is transmitted via DFRN.
  38          *
  39          * @param array $items Item elements
  40          * @param array $owner Owner record
  41          *
  42          * @return string DFRN entries
  43          */
  44         public static function entries($items,$owner) {
  45
  46                 $doc = new DOMDocument('1.0', 'utf-8');
  47                 $doc->formatOutput = true;
  48
  49                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
  50
  51                 if(! count($items))
  52                         return trim($doc->saveXML());
  53
  54                 foreach($items as $item) {
  55                         $entry = self::entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
  56                         $root->appendChild($entry);
  57                 }
  58
  59                 return(trim($doc->saveXML()));
  60         }
  61
  62         /**
  63          * @brief Generate an atom feed for the given user
  64          *
  65          * This function is called when another server is pulling data from the user feed.
  66          *
  67          * @param string $dfrn_id DFRN ID from the requesting party
  68          * @param string $owner_nick Owner nick name
  69          * @param string $last_update Date of the last update
  70          * @param int $direction Can be -1, 0 or 1.
  71          * @param boolean $onlyheader Output only the header without content? (Default is "no")
  72          *
  73          * @return string DFRN feed entries
  74          */
  75         public static function feed($dfrn_id, $owner_nick, $last_update, $direction = 0, $onlyheader = false) {
  76
  77                 $a = get_app();
  78
  79                 $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
  80                 $public_feed = (($dfrn_id) ? false : true);
  81                 $starred     = false;   // not yet implemented, possible security issues
  82                 $converse    = false;
  83
  84                 if($public_feed && $a->argc > 2) {
  85                         for($x = 2; $x < $a->argc; $x++) {
  86                                 if($a->argv[$x] == 'converse')
  87                                         $converse = true;
  88                                 if($a->argv[$x] == 'starred')
  89                                         $starred = true;
  90                                 if($a->argv[$x] == 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1]))
  91                                         $category = $a->argv[$x+1];
  92                         }
  93                 }
  94
  95
  96
  97                 // default permissions - anonymous user
  98
  99                 $sql_extra = " AND `item`.`allow_cid` = '' AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = '' ";
 100
 101                 $r = q("SELECT `contact`.*, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`, `user`.`account-type`
 102                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 103                         WHERE `contact`.`self` AND `user`.`nickname` = '%s' LIMIT 1",
 104                         dbesc($owner_nick)
 105                 );
 106
 107                 if(! count($r))
 108                         killme();
 109
 110                 $owner = $r[0];
 111                 $owner_id = $owner['uid'];
 112                 $owner_nick = $owner['nickname'];
 113
 114                 $sql_post_table = "";
 115                 $visibility = "";
 116
 117                 if(! $public_feed) {
 118
 119                         $sql_extra = '';
 120                         switch($direction) {
 121                                 case (-1):
 122                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 123                                         $my_id = $dfrn_id;
 124                                         break;
 125                                 case 0:
 126                                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 127                                         $my_id = '1:' . $dfrn_id;
 128                                         break;
 129                                 case 1:
 130                                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 131                                         $my_id = '0:' . $dfrn_id;
 132                                         break;
 133                                 default:
 134                                         return false;
 135                                         break; // NOTREACHED
 136                         }
 137
 138                         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 139                                 intval($owner_id)
 140                         );
 141
 142                         if(! count($r))
 143                                 killme();
 144
 145                         $contact = $r[0];
 146                         require_once('include/security.php');
 147                         $groups = init_groups_visitor($contact['id']);
 148
 149                         if(count($groups)) {
 150                                 for($x = 0; $x < count($groups); $x ++)
 151                                         $groups[$x] = '<' . intval($groups[$x]) . '>' ;
 152                                 $gs = implode('|', $groups);
 153                         } else
 154                                 $gs = '<<>>' ; // Impossible to match
 155
 156                         $sql_extra = sprintf("
 157                                 AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
 158                                 AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
 159                                 AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
 160                                 AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
 161                         ",
 162                                 intval($contact['id']),
 163                                 intval($contact['id']),
 164                                 dbesc($gs),
 165                                 dbesc($gs)
 166                         );
 167                 }
 168
 169                 if($public_feed)
 170                         $sort = 'DESC';
 171                 else
 172                         $sort = 'ASC';
 173
 174                 $date_field = "`changed`";
 175                 $sql_order = "`item`.`parent` ".$sort.", `item`.`created` ASC";
 176
 177                 if(! strlen($last_update))
 178                         $last_update = 'now -30 days';
 179
 180                 if(isset($category)) {
 181                         $sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 182                                         dbesc(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($owner_id));
 183                         //$sql_extra .= file_tag_file_query('item',$category,'category');
 184                 }
 185
 186                 if($public_feed) {
 187                         if(! $converse)
 188                                 $sql_extra .= " AND `contact`.`self` = 1 ";
 189                 }
 190
 191                 $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
 192
 193                 //      AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
 194                 //      dbesc($check_date),
 195
 196                 $r = q("SELECT STRAIGHT_JOIN `item`.*, `item`.`id` AS `item_id`,
 197                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 198                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 199                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 200                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 201                         FROM `item` $sql_post_table
 202                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 203                         AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 204                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 205                         WHERE `item`.`uid` = %d AND `item`.`visible` = 1 and `item`.`moderated` = 0 AND `item`.`parent` != 0
 206                         AND ((`item`.`wall` = 1) $visibility) AND `item`.$date_field > '%s'
 207                         $sql_extra
 208                         ORDER BY $sql_order LIMIT 0, 300",
 209                         intval($owner_id),
 210                         dbesc($check_date),
 211                         dbesc($sort)
 212                 );
 213
 214                 // Will check further below if this actually returned results.
 215                 // We will provide an empty feed if that is the case.
 216
 217                 $items = $r;
 218
 219                 $doc = new DOMDocument('1.0', 'utf-8');
 220                 $doc->formatOutput = true;
 221
 222                 $alternatelink = $owner['url'];
 223
 224                 if(isset($category))
 225                         $alternatelink .= "/category/".$category;
 226
 227                 if ($public_feed)
 228                         $author = "dfrn:owner";
 229                 else
 230                         $author = "author";
 231
 232                 $root = self::add_header($doc, $owner, $author, $alternatelink, true);
 233
 234                 // This hook can't work anymore
 235                 //      call_hooks('atom_feed', $atom);
 236
 237                 if (!count($items) OR $onlyheader) {
 238                         $atom = trim($doc->saveXML());
 239
 240                         call_hooks('atom_feed_end', $atom);
 241
 242                         return $atom;
 243                 }
 244
 245                 foreach($items as $item) {
 246
 247                         // prevent private email from leaking.
 248                         if($item['network'] == NETWORK_MAIL)
 249                                 continue;
 250
 251                         // public feeds get html, our own nodes use bbcode
 252
 253                         if($public_feed) {
 254                                 $type = 'html';
 255                                 // catch any email that's in a public conversation and make sure it doesn't leak
 256                                 if($item['private'])
 257                                         continue;
 258                         } else
 259                                 $type = 'text';
 260
 261                         $entry = self::entry($doc, $type, $item, $owner, true);
 262                         $root->appendChild($entry);
 263
 264                 }
 265
 266                 $atom = trim($doc->saveXML());
 267
 268                 call_hooks('atom_feed_end', $atom);
 269
 270                 return $atom;
 271         }
 272
 273         /**
 274          * @brief Create XML text for DFRN mails
 275          *
 276          * @param array $item message elements
 277          * @param array $owner Owner record
 278          *
 279          * @return string DFRN mail
 280          */
 281         public static function mail($item, $owner) {
 282                 $doc = new DOMDocument('1.0', 'utf-8');
 283                 $doc->formatOutput = true;
 284
 285                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 286
 287                 $mail = $doc->createElement("dfrn:mail");
 288                 $sender = $doc->createElement("dfrn:sender");
 289
 290                 xml::add_element($doc, $sender, "dfrn:name", $owner['name']);
 291                 xml::add_element($doc, $sender, "dfrn:uri", $owner['url']);
 292                 xml::add_element($doc, $sender, "dfrn:avatar", $owner['thumb']);
 293
 294                 $mail->appendChild($sender);
 295
 296                 xml::add_element($doc, $mail, "dfrn:id", $item['uri']);
 297                 xml::add_element($doc, $mail, "dfrn:in-reply-to", $item['parent-uri']);
 298                 xml::add_element($doc, $mail, "dfrn:sentdate", datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME));
 299                 xml::add_element($doc, $mail, "dfrn:subject", $item['title']);
 300                 xml::add_element($doc, $mail, "dfrn:content", $item['body']);
 301
 302                 $root->appendChild($mail);
 303
 304                 return(trim($doc->saveXML()));
 305         }
 306
 307         /**
 308          * @brief Create XML text for DFRN friend suggestions
 309          *
 310          * @param array $item suggestion elements
 311          * @param array $owner Owner record
 312          *
 313          * @return string DFRN suggestions
 314          */
 315         public static function fsuggest($item, $owner) {
 316                 $doc = new DOMDocument('1.0', 'utf-8');
 317                 $doc->formatOutput = true;
 318
 319                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 320
 321                 $suggest = $doc->createElement("dfrn:suggest");
 322
 323                 xml::add_element($doc, $suggest, "dfrn:url", $item['url']);
 324                 xml::add_element($doc, $suggest, "dfrn:name", $item['name']);
 325                 xml::add_element($doc, $suggest, "dfrn:photo", $item['photo']);
 326                 xml::add_element($doc, $suggest, "dfrn:request", $item['request']);
 327                 xml::add_element($doc, $suggest, "dfrn:note", $item['note']);
 328
 329                 $root->appendChild($suggest);
 330
 331                 return(trim($doc->saveXML()));
 332         }
 333
 334         /**
 335          * @brief Create XML text for DFRN relocations
 336          *
 337          * @param array $owner Owner record
 338          * @param int $uid User ID
 339          *
 340          * @return string DFRN relocations
 341          */
 342         public static function relocate($owner, $uid) {
 343
 344                 /* get site pubkey. this could be a new installation with no site keys*/
 345                 $pubkey = get_config('system','site_pubkey');
 346                 if(! $pubkey) {
 347                         $res = new_keypair(1024);
 348                         set_config('system','site_prvkey', $res['prvkey']);
 349                         set_config('system','site_pubkey', $res['pubkey']);
 350                 }
 351
 352                 $rp = q("SELECT `resource-id` , `scale`, type FROM `photo`
 353                                 WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;", $uid);
 354                 $photos = array();
 355                 $ext = Photo::supportedTypes();
 356
 357                 foreach($rp as $p)
 358                         $photos[$p['scale']] = app::get_baseurl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 359
 360                 unset($rp, $ext);
 361
 362                 $doc = new DOMDocument('1.0', 'utf-8');
 363                 $doc->formatOutput = true;
 364
 365                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 366
 367                 $relocate = $doc->createElement("dfrn:relocate");
 368
 369                 xml::add_element($doc, $relocate, "dfrn:url", $owner['url']);
 370                 xml::add_element($doc, $relocate, "dfrn:name", $owner['name']);
 371                 xml::add_element($doc, $relocate, "dfrn:addr", $owner['addr']);
 372                 xml::add_element($doc, $relocate, "dfrn:avatar", $owner['avatar']);
 373                 xml::add_element($doc, $relocate, "dfrn:photo", $photos[4]);
 374                 xml::add_element($doc, $relocate, "dfrn:thumb", $photos[5]);
 375                 xml::add_element($doc, $relocate, "dfrn:micro", $photos[6]);
 376                 xml::add_element($doc, $relocate, "dfrn:request", $owner['request']);
 377                 xml::add_element($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 378                 xml::add_element($doc, $relocate, "dfrn:notify", $owner['notify']);
 379                 xml::add_element($doc, $relocate, "dfrn:poll", $owner['poll']);
 380                 xml::add_element($doc, $relocate, "dfrn:sitepubkey", get_config('system','site_pubkey'));
 381
 382                 $root->appendChild($relocate);
 383
 384                 return(trim($doc->saveXML()));
 385         }
 386
 387         /**
 388          * @brief Adds the header elements for the DFRN protocol
 389          *
 390          * @param object $doc XML document
 391          * @param array $owner Owner record
 392          * @param string $authorelement Element name for the author
 393          * @param string $alternatelink link to profile or category
 394          * @param bool $public Is it a header for public posts?
 395          *
 396          * @return object XML root object
 397          */
 398         private function add_header($doc, $owner, $authorelement, $alternatelink = "", $public = false) {
 399
 400                 if ($alternatelink == "")
 401                         $alternatelink = $owner['url'];
 402
 403                 $root = $doc->createElementNS(NAMESPACE_ATOM1, 'feed');
 404                 $doc->appendChild($root);
 405
 406                 $root->setAttribute("xmlns:thr", NAMESPACE_THREAD);
 407                 $root->setAttribute("xmlns:at", NAMESPACE_TOMB);
 408                 $root->setAttribute("xmlns:media", NAMESPACE_MEDIA);
 409                 $root->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
 410                 $root->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
 411                 $root->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
 412                 $root->setAttribute("xmlns:poco", NAMESPACE_POCO);
 413                 $root->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
 414                 $root->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
 415
 416                 xml::add_element($doc, $root, "id", app::get_baseurl()."/profile/".$owner["nick"]);
 417                 xml::add_element($doc, $root, "title", $owner["name"]);
 418
 419                 $attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
 420                 xml::add_element($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 421
 422                 $attributes = array("rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/");
 423                 xml::add_element($doc, $root, "link", "", $attributes);
 424
 425                 $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $alternatelink);
 426                 xml::add_element($doc, $root, "link", "", $attributes);
 427
 428
 429                 if ($public) {
 430                         // DFRN itself doesn't uses this. But maybe someone else wants to subscribe to the public feed.
 431                         ostatus::hublinks($doc, $root);
 432
 433                         $attributes = array("rel" => "salmon", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 434                         xml::add_element($doc, $root, "link", "", $attributes);
 435
 436                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 437                         xml::add_element($doc, $root, "link", "", $attributes);
 438
 439                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 440                         xml::add_element($doc, $root, "link", "", $attributes);
 441                 }
 442
 443                 // For backward compatibility we keep this element
 444                 if ($owner['page-flags'] == PAGE_COMMUNITY)
 445                         xml::add_element($doc, $root, "dfrn:community", 1);
 446
 447                 // The former element is replaced by this one
 448                 xml::add_element($doc, $root, "dfrn:account_type", $owner["account-type"]);
 449
 450                 /// @todo We need a way to transmit the different page flags like "PAGE_PRVGROUP"
 451
 452                 xml::add_element($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
 453
 454                 $author = self::add_author($doc, $owner, $authorelement, $public);
 455                 $root->appendChild($author);
 456
 457                 return $root;
 458         }
 459
 460         /**
 461          * @brief Adds the author element in the header for the DFRN protocol
 462          *
 463          * @param object $doc XML document
 464          * @param array $owner Owner record
 465          * @param string $authorelement Element name for the author
 466          *
 467          * @return object XML author object
 468          */
 469         private function add_author($doc, $owner, $authorelement, $public) {
 470
 471                 // Is the profile hidden or shouldn't be published in the net? Then add the "hide" element
 472                 $r = q("SELECT `id` FROM `profile` INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 473                                 WHERE (`hidewall` OR NOT `net-publish`) AND `user`.`uid` = %d",
 474                         intval($owner['uid']));
 475                 if ($r)
 476                         $hidewall = true;
 477                 else
 478                         $hidewall = false;
 479
 480                 $author = $doc->createElement($authorelement);
 481
 482                 $namdate = datetime_convert('UTC', 'UTC', $owner['name-date'].'+00:00', ATOM_TIME);
 483                 $uridate = datetime_convert('UTC', 'UTC', $owner['uri-date'].'+00:00', ATOM_TIME);
 484                 $picdate = datetime_convert('UTC', 'UTC', $owner['avatar-date'].'+00:00', ATOM_TIME);
 485
 486                 if (!$public OR !$hidewall)
 487                         $attributes = array("dfrn:updated" => $namdate);
 488                 else
 489                         $attributes = array();
 490
 491                 xml::add_element($doc, $author, "name", $owner["name"], $attributes);
 492                 xml::add_element($doc, $author, "uri", app::get_baseurl().'/profile/'.$owner["nickname"], $attributes);
 493                 xml::add_element($doc, $author, "dfrn:handle", $owner["addr"], $attributes);
 494
 495                 $attributes = array("rel" => "photo", "type" => "image/jpeg",
 496                                         "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 497
 498                 if (!$public OR !$hidewall)
 499                         $attributes["dfrn:updated"] = $picdate;
 500
 501                 xml::add_element($doc, $author, "link", "", $attributes);
 502
 503                 $attributes["rel"] = "avatar";
 504                 xml::add_element($doc, $author, "link", "", $attributes);
 505
 506                 if ($hidewall)
 507                         xml::add_element($doc, $author, "dfrn:hide", "true");
 508
 509                 // The following fields will only be generated if the data isn't meant for a public feed
 510                 if ($public)
 511                         return $author;
 512
 513                 $birthday = feed_birthday($owner['uid'], $owner['timezone']);
 514
 515                 if ($birthday)
 516                         xml::add_element($doc, $author, "dfrn:birthday", $birthday);
 517
 518                 // Only show contact details when we are allowed to
 519                 $r = q("SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`,
 520                                 `user`.`timezone`, `profile`.`locality`, `profile`.`region`, `profile`.`country-name`,
 521                                 `profile`.`pub_keywords`, `profile`.`xmpp`, `profile`.`dob`
 522                         FROM `profile`
 523                                 INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 524                                 WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 525                         intval($owner['uid']));
 526                 if ($r) {
 527                         $profile = $r[0];
 528
 529                         xml::add_element($doc, $author, "poco:displayName", $profile["name"]);
 530                         xml::add_element($doc, $author, "poco:updated", $namdate);
 531
 532                         if (trim($profile["dob"]) != "0000-00-00")
 533                                 xml::add_element($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 534
 535                         xml::add_element($doc, $author, "poco:note", $profile["about"]);
 536                         xml::add_element($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 537
 538                         $savetz = date_default_timezone_get();
 539                         date_default_timezone_set($profile["timezone"]);
 540                         xml::add_element($doc, $author, "poco:utcOffset", date("P"));
 541                         date_default_timezone_set($savetz);
 542
 543                         if (trim($profile["homepage"]) != "") {
 544                                 $urls = $doc->createElement("poco:urls");
 545                                 xml::add_element($doc, $urls, "poco:type", "homepage");
 546                                 xml::add_element($doc, $urls, "poco:value", $profile["homepage"]);
 547                                 xml::add_element($doc, $urls, "poco:primary", "true");
 548                                 $author->appendChild($urls);
 549                         }
 550
 551                         if (trim($profile["pub_keywords"]) != "") {
 552                                 $keywords = explode(",", $profile["pub_keywords"]);
 553
 554                                 foreach ($keywords AS $keyword)
 555                                         xml::add_element($doc, $author, "poco:tags", trim($keyword));
 556
 557                         }
 558
 559                         if (trim($profile["xmpp"]) != "") {
 560                                 $ims = $doc->createElement("poco:ims");
 561                                 xml::add_element($doc, $ims, "poco:type", "xmpp");
 562                                 xml::add_element($doc, $ims, "poco:value", $profile["xmpp"]);
 563                                 xml::add_element($doc, $ims, "poco:primary", "true");
 564                                 $author->appendChild($ims);
 565                         }
 566
 567                         if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 568                                 $element = $doc->createElement("poco:address");
 569
 570                                 xml::add_element($doc, $element, "poco:formatted", formatted_location($profile));
 571
 572                                 if (trim($profile["locality"]) != "")
 573                                         xml::add_element($doc, $element, "poco:locality", $profile["locality"]);
 574
 575                                 if (trim($profile["region"]) != "")
 576                                         xml::add_element($doc, $element, "poco:region", $profile["region"]);
 577
 578                                 if (trim($profile["country-name"]) != "")
 579                                         xml::add_element($doc, $element, "poco:country", $profile["country-name"]);
 580
 581                                 $author->appendChild($element);
 582                         }
 583                 }
 584
 585                 return $author;
 586         }
 587
 588         /**
 589          * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 590          *
 591          * @param object $doc XML document
 592          * @param string $element Element name for the author
 593          * @param string $contact_url Link of the contact
 594          * @param array $items Item elements
 595          *
 596          * @return object XML author object
 597          */
 598         private function add_entry_author($doc, $element, $contact_url, $item) {
 599
 600                 $contact = get_contact_details_by_url($contact_url, $item["uid"]);
 601
 602                 $author = $doc->createElement($element);
 603                 xml::add_element($doc, $author, "name", $contact["name"]);
 604                 xml::add_element($doc, $author, "uri", $contact["url"]);
 605                 xml::add_element($doc, $author, "dfrn:handle", $contact["addr"]);
 606
 607                 /// @Todo
 608                 /// - Check real image type and image size
 609                 /// - Check which of these boths elements we should use
 610                 $attributes = array(
 611                                 "rel" => "photo",
 612                                 "type" => "image/jpeg",
 613                                 "media:width" => 80,
 614                                 "media:height" => 80,
 615                                 "href" => $contact["photo"]);
 616                 xml::add_element($doc, $author, "link", "", $attributes);
 617
 618                 $attributes = array(
 619                                 "rel" => "avatar",
 620                                 "type" => "image/jpeg",
 621                                 "media:width" => 80,
 622                                 "media:height" => 80,
 623                                 "href" => $contact["photo"]);
 624                 xml::add_element($doc, $author, "link", "", $attributes);
 625
 626                 return $author;
 627         }
 628
 629         /**
 630          * @brief Adds the activity elements
 631          *
 632          * @param object $doc XML document
 633          * @param string $element Element name for the activity
 634          * @param string $activity activity value
 635          *
 636          * @return object XML activity object
 637          */
 638         private function create_activity($doc, $element, $activity) {
 639
 640                 if($activity) {
 641                         $entry = $doc->createElement($element);
 642
 643                         $r = parse_xml_string($activity, false);
 644                         if(!$r)
 645                                 return false;
 646                         if($r->type)
 647                                 xml::add_element($doc, $entry, "activity:object-type", $r->type);
 648                         if($r->id)
 649                                 xml::add_element($doc, $entry, "id", $r->id);
 650                         if($r->title)
 651                                 xml::add_element($doc, $entry, "title", $r->title);
 652                         if($r->link) {
 653                                 if(substr($r->link,0,1) == '<') {
 654                                         if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
 655                                                 $r->link = str_replace('&','&amp;', $r->link);
 656
 657                                         $r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
 658
 659                                         // XML does need a single element as root element so we add a dummy element here
 660                                         $data = parse_xml_string("<dummy>".$r->link."</dummy>", false);
 661                                         if (is_object($data)) {
 662                                                 foreach ($data->link AS $link) {
 663                                                         $attributes = array();
 664                                                         foreach ($link->attributes() AS $parameter => $value)
 665                                                                 $attributes[$parameter] = $value;
 666                                                         xml::add_element($doc, $entry, "link", "", $attributes);
 667                                                 }
 668                                         }
 669                                 } else {
 670                                         $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $r->link);
 671                                         xml::add_element($doc, $entry, "link", "", $attributes);
 672                                 }
 673                         }
 674                         if($r->content)
 675                                 xml::add_element($doc, $entry, "content", bbcode($r->content), array("type" => "html"));
 676
 677                         return $entry;
 678                 }
 679
 680                 return false;
 681         }
 682
 683         /**
 684          * @brief Adds the elements for attachments
 685          *
 686          * @param object $doc XML document
 687          * @param object $root XML root
 688          * @param array $item Item element
 689          *
 690          * @return object XML attachment object
 691          */
 692         private function get_attachment($doc, $root, $item) {
 693                 $arr = explode('[/attach],',$item['attach']);
 694                 if(count($arr)) {
 695                         foreach($arr as $r) {
 696                                 $matches = false;
 697                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|',$r,$matches);
 698                                 if($cnt) {
 699                                         $attributes = array("rel" => "enclosure",
 700                                                         "href" => $matches[1],
 701                                                         "type" => $matches[3]);
 702
 703                                         if(intval($matches[2]))
 704                                                 $attributes["length"] = intval($matches[2]);
 705
 706                                         if(trim($matches[4]) != "")
 707                                                 $attributes["title"] = trim($matches[4]);
 708
 709                                         xml::add_element($doc, $root, "link", "", $attributes);
 710                                 }
 711                         }
 712                 }
 713         }
 714
 715         /**
 716          * @brief Adds the "entry" elements for the DFRN protocol
 717          *
 718          * @param object $doc XML document
 719          * @param string $type "text" or "html"
 720          * @param array $item Item element
 721          * @param array $owner Owner record
 722          * @param bool $comment Trigger the sending of the "comment" element
 723          * @param int $cid Contact ID of the recipient
 724          *
 725          * @return object XML entry object
 726          */
 727         private function entry($doc, $type, $item, $owner, $comment = false, $cid = 0) {
 728
 729                 $mentioned = array();
 730
 731                 if(!$item['parent'])
 732                         return;
 733
 734                 if($item['deleted']) {
 735                         $attributes = array("ref" => $item['uri'], "when" => datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME));
 736                         return xml::create_element($doc, "at:deleted-entry", "", $attributes);
 737                 }
 738
 739                 $entry = $doc->createElement("entry");
 740
 741                 if($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid'])
 742                         $body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
 743                 else
 744                         $body = $item['body'];
 745
 746                 // Remove the abstract element. It is only locally important.
 747                 $body = remove_abstract($body);
 748
 749                 if ($type == 'html') {
 750                         $htmlbody = $body;
 751
 752                         if ($item['title'] != "")
 753                                 $htmlbody = "[b]".$item['title']."[/b]\n\n".$htmlbody;
 754
 755                         $htmlbody = bbcode($htmlbody, false, false, 7);
 756                 }
 757
 758                 $author = self::add_entry_author($doc, "author", $item["author-link"], $item);
 759                 $entry->appendChild($author);
 760
 761                 $dfrnowner = self::add_entry_author($doc, "dfrn:owner", $item["owner-link"], $item);
 762                 $entry->appendChild($dfrnowner);
 763
 764                 if(($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 765                         $parent = q("SELECT `guid` FROM `item` WHERE `id` = %d", intval($item["parent"]));
 766                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 767                         $attributes = array("ref" => $parent_item, "type" => "text/html",
 768                                                 "href" => app::get_baseurl().'/display/'.$parent[0]['guid'],
 769                                                 "dfrn:diaspora_guid" => $parent[0]['guid']);
 770                         xml::add_element($doc, $entry, "thr:in-reply-to", "", $attributes);
 771                 }
 772
 773                 xml::add_element($doc, $entry, "id", $item["uri"]);
 774                 xml::add_element($doc, $entry, "title", $item["title"]);
 775
 776                 xml::add_element($doc, $entry, "published", datetime_convert("UTC","UTC",$item["created"]."+00:00",ATOM_TIME));
 777                 xml::add_element($doc, $entry, "updated", datetime_convert("UTC","UTC",$item["edited"]."+00:00",ATOM_TIME));
 778
 779                 // "dfrn:env" is used to read the content
 780                 xml::add_element($doc, $entry, "dfrn:env", base64url_encode($body, true));
 781
 782                 // The "content" field is not read by the receiver. We could remove it when the type is "text"
 783                 // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
 784                 xml::add_element($doc, $entry, "content", (($type == 'html') ? $htmlbody : $body), array("type" => $type));
 785
 786                 // We save this value in "plink". Maybe we should read it from there as well?
 787                 xml::add_element($doc, $entry, "link", "", array("rel" => "alternate", "type" => "text/html",
 788                                                                 "href" => app::get_baseurl()."/display/".$item["guid"]));
 789
 790                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
 791                 // It is included in the rewritten code for completeness
 792                 if ($comment)
 793                         xml::add_element($doc, $entry, "dfrn:comment-allow", intval($item['last-child']));
 794
 795                 if($item['location'])
 796                         xml::add_element($doc, $entry, "dfrn:location", $item['location']);
 797
 798                 if($item['coord'])
 799                         xml::add_element($doc, $entry, "georss:point", $item['coord']);
 800
 801                 if(($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid']))
 802                         xml::add_element($doc, $entry, "dfrn:private", (($item['private']) ? $item['private'] : 1));
 803
 804                 if($item['extid'])
 805                         xml::add_element($doc, $entry, "dfrn:extid", $item['extid']);
 806
 807                 if($item['bookmark'])
 808                         xml::add_element($doc, $entry, "dfrn:bookmark", "true");
 809
 810                 if($item['app'])
 811                         xml::add_element($doc, $entry, "statusnet:notice_info", "", array("local_id" => $item['id'], "source" => $item['app']));
 812
 813                 xml::add_element($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
 814
 815                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
 816                 // It is needed for relayed comments to Diaspora.
 817                 if($item['signed_text']) {
 818                         $sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
 819                         xml::add_element($doc, $entry, "dfrn:diaspora_signature", $sign);
 820                 }
 821
 822                 xml::add_element($doc, $entry, "activity:verb", construct_verb($item));
 823
 824                 if ($item['object-type'] != "")
 825                         xml::add_element($doc, $entry, "activity:object-type", $item['object-type']);
 826                 elseif ($item['id'] == $item['parent'])
 827                         xml::add_element($doc, $entry, "activity:object-type", ACTIVITY_OBJ_NOTE);
 828                 else
 829                         xml::add_element($doc, $entry, "activity:object-type", ACTIVITY_OBJ_COMMENT);
 830
 831                 $actobj = self::create_activity($doc, "activity:object", $item['object']);
 832                 if ($actobj)
 833                         $entry->appendChild($actobj);
 834
 835                 $actarg = self::create_activity($doc, "activity:target", $item['target']);
 836                 if ($actarg)
 837                         $entry->appendChild($actarg);
 838
 839                 $tags = item_getfeedtags($item);
 840
 841                 if(count($tags)) {
 842                         foreach($tags as $t)
 843                                 if (($type != 'html') OR ($t[0] != "@"))
 844                                         xml::add_element($doc, $entry, "category", "", array("scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]));
 845                 }
 846
 847                 if(count($tags))
 848                         foreach($tags as $t)
 849                                 if ($t[0] == "@")
 850                                         $mentioned[$t[1]] = $t[1];
 851
 852                 foreach ($mentioned AS $mention) {
 853                         $r = q("SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
 854                                 intval($owner["uid"]),
 855                                 dbesc(normalise_link($mention)));
 856                         if ($r[0]["forum"] OR $r[0]["prv"])
 857                                 xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 858                                                                                         "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
 859                                                                                         "href" => $mention));
 860                         else
 861                                 xml::add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 862                                                                                         "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
 863                                                                                         "href" => $mention));
 864                 }
 865
 866                 self::get_attachment($doc, $entry, $item);
 867
 868                 return $entry;
 869         }
 870
 871         /**
 872          * @brief Delivers the atom content to the contacts
 873          *
 874          * @param array $owner Owner record
 875          * @param array $contactr Contact record of the receiver
 876          * @param string $atom Content that will be transmitted
 877          * @param bool $dissolve (to be documented)
 878          *
 879          * @return int Deliver status. -1 means an error.
 880          */
 881         public static function deliver($owner,$contact,$atom, $dissolve = false) {
 882
 883                 $a = get_app();
 884
 885                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
 886
 887                 if($contact['duplex'] && $contact['dfrn-id'])
 888                         $idtosend = '0:' . $orig_id;
 889                 if($contact['duplex'] && $contact['issued-id'])
 890                         $idtosend = '1:' . $orig_id;
 891
 892
 893                 $rino = get_config('system','rino_encrypt');
 894                 $rino = intval($rino);
 895                 // use RINO1 if mcrypt isn't installed and RINO2 was selected
 896                 if ($rino==2 and !function_exists('mcrypt_create_iv')) $rino=1;
 897
 898                 logger("Local rino version: ". $rino, LOGGER_DEBUG);
 899
 900                 $ssl_val = intval(get_config('system','ssl_policy'));
 901                 $ssl_policy = '';
 902
 903                 switch($ssl_val){
 904                         case SSL_POLICY_FULL:
 905                                 $ssl_policy = 'full';
 906                                 break;
 907                         case SSL_POLICY_SELFSIGN:
 908                                 $ssl_policy = 'self';
 909                                 break;
 910                         case SSL_POLICY_NONE:
 911                         default:
 912                                 $ssl_policy = 'none';
 913                                 break;
 914                 }
 915
 916                 $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
 917
 918                 logger('dfrn_deliver: ' . $url);
 919
 920                 $xml = fetch_url($url);
 921
 922                 $curl_stat = $a->get_curl_code();
 923                 if(! $curl_stat)
 924                         return(-1); // timed out
 925
 926                 logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
 927
 928                 if(! $xml)
 929                         return 3;
 930
 931                 if(strpos($xml,'<?xml') === false) {
 932                         logger('dfrn_deliver: no valid XML returned');
 933                         logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
 934                         return 3;
 935                 }
 936
 937                 $res = parse_xml_string($xml);
 938
 939                 if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 940                         return (($res->status) ? $res->status : 3);
 941
 942                 $postvars     = array();
 943                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
 944                 $challenge    = hex2bin((string) $res->challenge);
 945                 $perm         = (($res->perm) ? $res->perm : null);
 946                 $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
 947                 $rino_remote_version = intval($res->rino);
 948                 $page         = (($owner['page-flags'] == PAGE_COMMUNITY) ? 1 : 0);
 949
 950                 logger("Remote rino version: ".$rino_remote_version." for ".$contact["url"], LOGGER_DEBUG);
 951
 952                 if($owner['page-flags'] == PAGE_PRVGROUP)
 953                         $page = 2;
 954
 955                 $final_dfrn_id = '';
 956
 957                 if($perm) {
 958                         if((($perm == 'rw') && (! intval($contact['writable'])))
 959                                 || (($perm == 'r') && (intval($contact['writable'])))) {
 960                                 q("update contact set writable = %d where id = %d",
 961                                         intval(($perm == 'rw') ? 1 : 0),
 962                                         intval($contact['id'])
 963                                 );
 964                                 $contact['writable'] = (string) 1 - intval($contact['writable']);
 965                         }
 966                 }
 967
 968                 if(($contact['duplex'] && strlen($contact['pubkey']))
 969                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
 970                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
 971                         openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 972                         openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 973                 } else {
 974                         openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 975                         openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 976                 }
 977
 978                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 979
 980                 if(strpos($final_dfrn_id,':') == 1)
 981                         $final_dfrn_id = substr($final_dfrn_id,2);
 982
 983                 if($final_dfrn_id != $orig_id) {
 984                         logger('dfrn_deliver: wrong dfrn_id.');
 985                         // did not decode properly - cannot trust this site
 986                         return 3;
 987                 }
 988
 989                 $postvars['dfrn_id']      = $idtosend;
 990                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 991                 if($dissolve)
 992                         $postvars['dissolve'] = '1';
 993
 994
 995                 if((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
 996                         $postvars['data'] = $atom;
 997                         $postvars['perm'] = 'rw';
 998                 } else {
 999                         $postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
1000                         $postvars['perm'] = 'r';
1001                 }
1002
1003                 $postvars['ssl_policy'] = $ssl_policy;
1004
1005                 if($page)
1006                         $postvars['page'] = $page;
1007
1008
1009                 if($rino>0 && $rino_remote_version>0 && (! $dissolve)) {
1010                         logger('rino version: '. $rino_remote_version);
1011
1012                         switch($rino_remote_version) {
1013                                 case 1:
1014                                         // Deprecated rino version!
1015                                         $key = substr(random_string(),0,16);
1016                                         $data = aes_encrypt($postvars['data'],$key);
1017                                         break;
1018                                 case 2:
1019                                         // RINO 2 based on php-encryption
1020                                         try {
1021                                                 $key = Crypto::createNewRandomKey();
1022                                         } catch (CryptoTestFailed $ex) {
1023                                                 logger('Cannot safely create a key');
1024                                                 return -1;
1025                                         } catch (CannotPerformOperation $ex) {
1026                                                 logger('Cannot safely create a key');
1027                                                 return -1;
1028                                         }
1029                                         try {
1030                                                 $data = Crypto::encrypt($postvars['data'], $key);
1031                                         } catch (CryptoTestFailed $ex) {
1032                                                 logger('Cannot safely perform encryption');
1033                                                 return -1;
1034                                         } catch (CannotPerformOperation $ex) {
1035                                                 logger('Cannot safely perform encryption');
1036                                                 return -1;
1037                                         }
1038                                         break;
1039                                 default:
1040                                         logger("rino: invalid requested verision '$rino_remote_version'");
1041                                         return -1;
1042                         }
1043
1044                         $postvars['rino'] = $rino_remote_version;
1045                         $postvars['data'] = bin2hex($data);
1046
1047                         #logger('rino: sent key = ' . $key, LOGGER_DEBUG);
1048
1049
1050                         if($dfrn_version >= 2.1) {
1051                                 if(($contact['duplex'] && strlen($contact['pubkey']))
1052                                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
1053                                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey'])))
1054
1055                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1056                                 else
1057                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1058
1059                         } else {
1060                                 if(($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY))
1061                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1062                                 else
1063                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1064
1065                         }
1066
1067                         logger('md5 rawkey ' . md5($postvars['key']));
1068
1069                         $postvars['key'] = bin2hex($postvars['key']);
1070                 }
1071
1072
1073                 logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars,true), LOGGER_DATA);
1074
1075                 $xml = post_url($contact['notify'],$postvars);
1076
1077                 logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
1078
1079                 $curl_stat = $a->get_curl_code();
1080                 if((! $curl_stat) || (! strlen($xml)))
1081                         return(-1); // timed out
1082
1083                 if(($curl_stat == 503) && (stristr($a->get_curl_headers(),'retry-after')))
1084                         return(-1);
1085
1086                 if(strpos($xml,'<?xml') === false) {
1087                         logger('dfrn_deliver: phase 2: no valid XML returned');
1088                         logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
1089                         return 3;
1090                 }
1091
1092                 if($contact['term-date'] != '0000-00-00 00:00:00') {
1093                         logger("dfrn_deliver: $url back from the dead - removing mark for death");
1094                         require_once('include/Contact.php');
1095                         unmark_for_death($contact);
1096                 }
1097
1098                 $res = parse_xml_string($xml);
1099
1100                 return $res->status;
1101         }
1102
1103         /**
1104          * @brief Add new birthday event for this person
1105          *
1106          * @param array $contact Contact record
1107          * @param string $birthday Birthday of the contact
1108          *
1109          */
1110         private function birthday_event($contact, $birthday) {
1111
1112                 logger("updating birthday: ".$birthday." for contact ".$contact["id"]);
1113
1114                 $bdtext = sprintf(t("%s\'s birthday"), $contact["name"]);
1115                 $bdtext2 = sprintf(t("Happy Birthday %s"), " [url=".$contact["url"]."]".$contact["name"]."[/url]") ;
1116
1117
1118                 $r = q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`)
1119                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s') ",
1120                         intval($contact["uid"]),
1121                         intval($contact["id"]),
1122                         dbesc(datetime_convert()),
1123                         dbesc(datetime_convert()),
1124                         dbesc(datetime_convert("UTC","UTC", $birthday)),
1125                         dbesc(datetime_convert("UTC","UTC", $birthday." + 1 day ")),
1126                         dbesc($bdtext),
1127                         dbesc($bdtext2),
1128                         dbesc("birthday")
1129                 );
1130         }
1131
1132         /**
1133          * @brief Fetch the author data from head or entry items
1134          *
1135          * @param object $xpath XPath object
1136          * @param object $context In which context should the data be searched
1137          * @param array $importer Record of the importer user mixed with contact of the content
1138          * @param string $element Element name from which the data is fetched
1139          * @param bool $onlyfetch Should the data only be fetched or should it update the contact record as well
1140          *
1141          * @return Returns an array with relevant data of the author
1142          */
1143         private function fetchauthor($xpath, $context, $importer, $element, $onlyfetch, $xml = "") {
1144
1145                 $author = array();
1146                 $author["name"] = $xpath->evaluate($element."/atom:name/text()", $context)->item(0)->nodeValue;
1147                 $author["link"] = $xpath->evaluate($element."/atom:uri/text()", $context)->item(0)->nodeValue;
1148
1149                 $r = q("SELECT `id`, `uid`, `url`, `network`, `avatar-date`, `name-date`, `uri-date`, `addr`,
1150                                 `name`, `nick`, `about`, `location`, `keywords`, `xmpp`, `bdyear`, `bd`, `hidden`
1151                                 FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND `network` != '%s'",
1152                         intval($importer["uid"]), dbesc(normalise_link($author["link"])), dbesc(NETWORK_STATUSNET));
1153                 if ($r) {
1154                         $contact = $r[0];
1155                         $author["contact-id"] = $r[0]["id"];
1156                         $author["network"] = $r[0]["network"];
1157                 } else {
1158                         if (!$onlyfetch)
1159                                 logger("Contact ".$author["link"]." wasn't found for user ".$importer["uid"]." XML: ".$xml, LOGGER_DEBUG);
1160
1161                         $author["contact-id"] = $importer["id"];
1162                         $author["network"] = $importer["network"];
1163                         $onlyfetch = true;
1164                 }
1165
1166                 // Until now we aren't serving different sizes - but maybe later
1167                 $avatarlist = array();
1168                 // @todo check if "avatar" or "photo" would be the best field in the specification
1169                 $avatars = $xpath->query($element."/atom:link[@rel='avatar']", $context);
1170                 foreach($avatars AS $avatar) {
1171                         $href = "";
1172                         $width = 0;
1173                         foreach($avatar->attributes AS $attributes) {
1174                                 if ($attributes->name == "href")
1175                                         $href = $attributes->textContent;
1176                                 if ($attributes->name == "width")
1177                                         $width = $attributes->textContent;
1178                                 if ($attributes->name == "updated")
1179                                         $contact["avatar-date"] = $attributes->textContent;
1180                         }
1181                         if (($width > 0) AND ($href != ""))
1182                                 $avatarlist[$width] = $href;
1183                 }
1184                 if (count($avatarlist) > 0) {
1185                         krsort($avatarlist);
1186                         $author["avatar"] = current($avatarlist);
1187                 }
1188
1189                 if ($r AND !$onlyfetch) {
1190                         logger("Check if contact details for contact ".$r[0]["id"]." (".$r[0]["nick"].") have to be updated.", LOGGER_DEBUG);
1191
1192                         $poco = array("url" => $contact["url"]);
1193
1194                         // When was the last change to name or uri?
1195                         $name_element = $xpath->query($element."/atom:name", $context)->item(0);
1196                         foreach($name_element->attributes AS $attributes)
1197                                 if ($attributes->name == "updated")
1198                                         $poco["name-date"] = $attributes->textContent;
1199
1200                         $link_element = $xpath->query($element."/atom:link", $context)->item(0);
1201                         foreach($link_element->attributes AS $attributes)
1202                                 if ($attributes->name == "updated")
1203                                         $poco["uri-date"] = $attributes->textContent;
1204
1205                         // Update contact data
1206                         $value = $xpath->evaluate($element."/dfrn:handle/text()", $context)->item(0)->nodeValue;
1207                         if ($value != "")
1208                                 $poco["addr"] = $value;
1209
1210                         $value = $xpath->evaluate($element."/poco:displayName/text()", $context)->item(0)->nodeValue;
1211                         if ($value != "")
1212                                 $poco["name"] = $value;
1213
1214                         $value = $xpath->evaluate($element."/poco:preferredUsername/text()", $context)->item(0)->nodeValue;
1215                         if ($value != "")
1216                                 $poco["nick"] = $value;
1217
1218                         $value = $xpath->evaluate($element."/poco:note/text()", $context)->item(0)->nodeValue;
1219                         if ($value != "")
1220                                 $poco["about"] = $value;
1221
1222                         $value = $xpath->evaluate($element."/poco:address/poco:formatted/text()", $context)->item(0)->nodeValue;
1223                         if ($value != "")
1224                                 $poco["location"] = $value;
1225
1226                         /// @todo Only search for elements with "poco:type" = "xmpp"
1227                         $value = $xpath->evaluate($element."/poco:ims/poco:value/text()", $context)->item(0)->nodeValue;
1228                         if ($value != "")
1229                                 $poco["xmpp"] = $value;
1230
1231                         /// @todo Add support for the following fields that we don't support by now in the contact table:
1232                         /// - poco:utcOffset
1233                         /// - poco:urls
1234                         /// - poco:locality
1235                         /// - poco:region
1236                         /// - poco:country
1237
1238                         // If the "hide" element is present then the profile isn't searchable.
1239                         $hide = intval($xpath->evaluate($element."/dfrn:hide/text()", $context)->item(0)->nodeValue == "true");
1240
1241                         logger("Hidden status for contact ".$contact["url"].": ".$hide, LOGGER_DEBUG);
1242
1243                         // If the contact isn't searchable then set the contact to "hidden".
1244                         // Problem: This can be manually overridden by the user.
1245                         if ($hide)
1246                                 $contact["hidden"] = true;
1247
1248                         // Save the keywords into the contact table
1249                         $tags = array();
1250                         $tagelements = $xpath->evaluate($element."/poco:tags/text()", $context);
1251                         foreach($tagelements AS $tag)
1252                                 $tags[$tag->nodeValue] = $tag->nodeValue;
1253
1254                         if (count($tags))
1255                                 $poco["keywords"] = implode(", ", $tags);
1256
1257                         // "dfrn:birthday" contains the birthday converted to UTC
1258                         $old_bdyear = $contact["bdyear"];
1259
1260                         $birthday = $xpath->evaluate($element."/dfrn:birthday/text()", $context)->item(0)->nodeValue;
1261
1262                         if (strtotime($birthday) > time()) {
1263                                 $bd_timestamp = strtotime($birthday);
1264
1265                                 $poco["bdyear"] = date("Y", $bd_timestamp);
1266                         }
1267
1268                         // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
1269                         $value = $xpath->evaluate($element."/poco:birthday/text()", $context)->item(0)->nodeValue;
1270
1271                         if (!in_array($value, array("", "0000-00-00"))) {
1272                                 $bdyear = date("Y");
1273                                 $value = str_replace("0000", $bdyear, $value);
1274
1275                                 if (strtotime($value) < time()) {
1276                                         $value = str_replace($bdyear, $bdyear + 1, $value);
1277                                         $bdyear = $bdyear + 1;
1278                                 }
1279
1280                                 $poco["bd"] = $value;
1281                         }
1282
1283                         $contact = array_merge($contact, $poco);
1284
1285                         if ($old_bdyear != $contact["bdyear"])
1286                                 self::birthday_event($contact, $birthday);
1287
1288                         // Get all field names
1289                         $fields = array();
1290                         foreach ($r[0] AS $field => $data)
1291                                 $fields[$field] = $data;
1292
1293                         unset($fields["id"]);
1294                         unset($fields["uid"]);
1295                         unset($fields["url"]);
1296                         unset($fields["avatar-date"]);
1297                         unset($fields["name-date"]);
1298                         unset($fields["uri-date"]);
1299
1300                         // Update check for this field has to be done differently
1301                         $datefields = array("name-date", "uri-date");
1302                         foreach ($datefields AS $field)
1303                                 if (strtotime($contact[$field]) > strtotime($r[0][$field])) {
1304                                         logger("Difference for contact ".$contact["id"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
1305                                         $update = true;
1306                                 }
1307
1308                         foreach ($fields AS $field => $data)
1309                                 if ($contact[$field] != $r[0][$field]) {
1310                                         logger("Difference for contact ".$contact["id"]." in field '".$field."'. New value: '".$contact[$field]."', old value '".$r[0][$field]."'", LOGGER_DEBUG);
1311                                         $update = true;
1312                                 }
1313
1314                         if ($update) {
1315                                 logger("Update contact data for contact ".$contact["id"]." (".$contact["nick"].")", LOGGER_DEBUG);
1316
1317                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `about` = '%s', `location` = '%s',
1318                                         `addr` = '%s', `keywords` = '%s', `bdyear` = '%s', `bd` = '%s', `hidden` = %d,
1319                                         `xmpp` = '%s', `name-date`  = '%s', `uri-date` = '%s'
1320                                         WHERE `id` = %d AND `network` = '%s'",
1321                                         dbesc($contact["name"]), dbesc($contact["nick"]), dbesc($contact["about"]), dbesc($contact["location"]),
1322                                         dbesc($contact["addr"]), dbesc($contact["keywords"]), dbesc($contact["bdyear"]),
1323                                         dbesc($contact["bd"]), intval($contact["hidden"]), dbesc($contact["xmpp"]),
1324                                         dbesc($contact["name-date"]), dbesc($contact["uri-date"]),
1325                                         intval($contact["id"]), dbesc($contact["network"]));
1326                         }
1327
1328                         update_contact_avatar($author["avatar"], $importer["uid"], $contact["id"],
1329                                                 (strtotime($contact["avatar-date"]) > strtotime($r[0]["avatar-date"])));
1330
1331                         // The generation is a sign for the reliability of the provided data.
1332                         // It is used in the socgraph.php to prevent that old contact data
1333                         // that was relayed over several servers can overwrite contact
1334                         // data that we received directly.
1335
1336                         $poco["generation"] = 2;
1337                         $poco["photo"] = $author["avatar"];
1338                         $poco["hide"] = $hide;
1339                         update_gcontact($poco);
1340                 }
1341
1342                 return($author);
1343         }
1344
1345         /**
1346          * @brief Transforms activity objects into an XML string
1347          *
1348          * @param object $xpath XPath object
1349          * @param object $activity Activity object
1350          * @param text $element element name
1351          *
1352          * @return string XML string
1353          */
1354         private function transform_activity($xpath, $activity, $element) {
1355                 if (!is_object($activity))
1356                         return "";
1357
1358                 $obj_doc = new DOMDocument("1.0", "utf-8");
1359                 $obj_doc->formatOutput = true;
1360
1361                 $obj_element = $obj_doc->createElementNS(NAMESPACE_ATOM1, $element);
1362
1363                 $activity_type = $xpath->query("activity:object-type/text()", $activity)->item(0)->nodeValue;
1364                 xml::add_element($obj_doc, $obj_element, "type", $activity_type);
1365
1366                 $id = $xpath->query("atom:id", $activity)->item(0);
1367                 if (is_object($id))
1368                         $obj_element->appendChild($obj_doc->importNode($id, true));
1369
1370                 $title = $xpath->query("atom:title", $activity)->item(0);
1371                 if (is_object($title))
1372                         $obj_element->appendChild($obj_doc->importNode($title, true));
1373
1374                 $links = $xpath->query("atom:link", $activity);
1375                 if (is_object($links))
1376                         foreach ($links AS $link)
1377                                 $obj_element->appendChild($obj_doc->importNode($link, true));
1378
1379                 $content = $xpath->query("atom:content", $activity)->item(0);
1380                 if (is_object($content))
1381                         $obj_element->appendChild($obj_doc->importNode($content, true));
1382
1383                 $obj_doc->appendChild($obj_element);
1384
1385                 $objxml = $obj_doc->saveXML($obj_element);
1386
1387                 // @todo This isn't totally clean. We should find a way to transform the namespaces
1388                 $objxml = str_replace("<".$element.' xmlns="http://www.w3.org/2005/Atom">', "<".$element.">", $objxml);
1389                 return($objxml);
1390         }
1391
1392         /**
1393          * @brief Processes the mail elements
1394          *
1395          * @param object $xpath XPath object
1396          * @param object $mail mail elements
1397          * @param array $importer Record of the importer user mixed with contact of the content
1398          */
1399         private function process_mail($xpath, $mail, $importer) {
1400
1401                 logger("Processing mails");
1402
1403                 $msg = array();
1404                 $msg["uid"] = $importer["importer_uid"];
1405                 $msg["from-name"] = $xpath->query("dfrn:sender/dfrn:name/text()", $mail)->item(0)->nodeValue;
1406                 $msg["from-url"] = $xpath->query("dfrn:sender/dfrn:uri/text()", $mail)->item(0)->nodeValue;
1407                 $msg["from-photo"] = $xpath->query("dfrn:sender/dfrn:avatar/text()", $mail)->item(0)->nodeValue;
1408                 $msg["contact-id"] = $importer["id"];
1409                 $msg["uri"] = $xpath->query("dfrn:id/text()", $mail)->item(0)->nodeValue;
1410                 $msg["parent-uri"] = $xpath->query("dfrn:in-reply-to/text()", $mail)->item(0)->nodeValue;
1411                 $msg["created"] = $xpath->query("dfrn:sentdate/text()", $mail)->item(0)->nodeValue;
1412                 $msg["title"] = $xpath->query("dfrn:subject/text()", $mail)->item(0)->nodeValue;
1413                 $msg["body"] = $xpath->query("dfrn:content/text()", $mail)->item(0)->nodeValue;
1414                 $msg["seen"] = 0;
1415                 $msg["replied"] = 0;
1416
1417                 dbesc_array($msg);
1418
1419                 $r = dbq("INSERT INTO `mail` (`".implode("`, `", array_keys($msg))."`) VALUES ('".implode("', '", array_values($msg))."')");
1420
1421                 // send notifications.
1422
1423                 $notif_params = array(
1424                         "type" => NOTIFY_MAIL,
1425                         "notify_flags" => $importer["notify-flags"],
1426                         "language" => $importer["language"],
1427                         "to_name" => $importer["username"],
1428                         "to_email" => $importer["email"],
1429                         "uid" => $importer["importer_uid"],
1430                         "item" => $msg,
1431                         "source_name" => $msg["from-name"],
1432                         "source_link" => $importer["url"],
1433                         "source_photo" => $importer["thumb"],
1434                         "verb" => ACTIVITY_POST,
1435                         "otype" => "mail"
1436                 );
1437
1438                 notification($notif_params);
1439
1440                 logger("Mail is processed, notification was sent.");
1441         }
1442
1443         /**
1444          * @brief Processes the suggestion elements
1445          *
1446          * @param object $xpath XPath object
1447          * @param object $suggestion suggestion elements
1448          * @param array $importer Record of the importer user mixed with contact of the content
1449          */
1450         private function process_suggestion($xpath, $suggestion, $importer) {
1451
1452                 logger("Processing suggestions");
1453
1454                 $suggest = array();
1455                 $suggest["uid"] = $importer["importer_uid"];
1456                 $suggest["cid"] = $importer["id"];
1457                 $suggest["url"] = $xpath->query("dfrn:url/text()", $suggestion)->item(0)->nodeValue;
1458                 $suggest["name"] = $xpath->query("dfrn:name/text()", $suggestion)->item(0)->nodeValue;
1459                 $suggest["photo"] = $xpath->query("dfrn:photo/text()", $suggestion)->item(0)->nodeValue;
1460                 $suggest["request"] = $xpath->query("dfrn:request/text()", $suggestion)->item(0)->nodeValue;
1461                 $suggest["body"] = $xpath->query("dfrn:note/text()", $suggestion)->item(0)->nodeValue;
1462
1463                 // Does our member already have a friend matching this description?
1464
1465                 $r = q("SELECT `id` FROM `contact` WHERE `name` = '%s' AND `nurl` = '%s' AND `uid` = %d LIMIT 1",
1466                         dbesc($suggest["name"]),
1467                         dbesc(normalise_link($suggest["url"])),
1468                         intval($suggest["uid"])
1469                 );
1470                 if(count($r))
1471                         return false;
1472
1473                 // Do we already have an fcontact record for this person?
1474
1475                 $fid = 0;
1476                 $r = q("SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1477                         dbesc($suggest["url"]),
1478                         dbesc($suggest["name"]),
1479                         dbesc($suggest["request"])
1480                 );
1481                 if(count($r)) {
1482                         $fid = $r[0]["id"];
1483
1484                         // OK, we do. Do we already have an introduction for this person ?
1485                         $r = q("SELECT `id` FROM `intro` WHERE `uid` = %d AND `fid` = %d LIMIT 1",
1486                                 intval($suggest["uid"]),
1487                                 intval($fid)
1488                         );
1489                         if(count($r))
1490                                 return false;
1491                 }
1492                 if(!$fid)
1493                         $r = q("INSERT INTO `fcontact` (`name`,`url`,`photo`,`request`) VALUES ('%s', '%s', '%s', '%s')",
1494                         dbesc($suggest["name"]),
1495                         dbesc($suggest["url"]),
1496                         dbesc($suggest["photo"]),
1497                         dbesc($suggest["request"])
1498                 );
1499                 $r = q("SELECT `id` FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
1500                         dbesc($suggest["url"]),
1501                         dbesc($suggest["name"]),
1502                         dbesc($suggest["request"])
1503                 );
1504                 if(count($r))
1505                         $fid = $r[0]["id"];
1506                 else
1507                         // database record did not get created. Quietly give up.
1508                         return false;
1509
1510
1511                 $hash = random_string();
1512
1513                 $r = q("INSERT INTO `intro` (`uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked`)
1514                         VALUES(%d, %d, %d, '%s', '%s', '%s', %d)",
1515                         intval($suggest["uid"]),
1516                         intval($fid),
1517                         intval($suggest["cid"]),
1518                         dbesc($suggest["body"]),
1519                         dbesc($hash),
1520                         dbesc(datetime_convert()),
1521                         intval(0)
1522                 );
1523
1524                 notification(array(
1525                         "type"         => NOTIFY_SUGGEST,
1526                         "notify_flags" => $importer["notify-flags"],
1527                         "language"     => $importer["language"],
1528                         "to_name"      => $importer["username"],
1529                         "to_email"     => $importer["email"],
1530                         "uid"          => $importer["importer_uid"],
1531                         "item"         => $suggest,
1532                         "link"         => App::get_baseurl()."/notifications/intros",
1533                         "source_name"  => $importer["name"],
1534                         "source_link"  => $importer["url"],
1535                         "source_photo" => $importer["photo"],
1536                         "verb"         => ACTIVITY_REQ_FRIEND,
1537                         "otype"        => "intro"
1538                 ));
1539
1540                 return true;
1541
1542         }
1543
1544         /**
1545          * @brief Processes the relocation elements
1546          *
1547          * @param object $xpath XPath object
1548          * @param object $relocation relocation elements
1549          * @param array $importer Record of the importer user mixed with contact of the content
1550          */
1551         private function process_relocation($xpath, $relocation, $importer) {
1552
1553                 logger("Processing relocations");
1554
1555                 $relocate = array();
1556                 $relocate["uid"] = $importer["importer_uid"];
1557                 $relocate["cid"] = $importer["id"];
1558                 $relocate["url"] = $xpath->query("dfrn:url/text()", $relocation)->item(0)->nodeValue;
1559                 $relocate["addr"] = $xpath->query("dfrn:addr/text()", $relocation)->item(0)->nodeValue;
1560                 $relocate["name"] = $xpath->query("dfrn:name/text()", $relocation)->item(0)->nodeValue;
1561                 $relocate["avatar"] = $xpath->query("dfrn:avatar/text()", $relocation)->item(0)->nodeValue;
1562                 $relocate["photo"] = $xpath->query("dfrn:photo/text()", $relocation)->item(0)->nodeValue;
1563                 $relocate["thumb"] = $xpath->query("dfrn:thumb/text()", $relocation)->item(0)->nodeValue;
1564                 $relocate["micro"] = $xpath->query("dfrn:micro/text()", $relocation)->item(0)->nodeValue;
1565                 $relocate["request"] = $xpath->query("dfrn:request/text()", $relocation)->item(0)->nodeValue;
1566                 $relocate["confirm"] = $xpath->query("dfrn:confirm/text()", $relocation)->item(0)->nodeValue;
1567                 $relocate["notify"] = $xpath->query("dfrn:notify/text()", $relocation)->item(0)->nodeValue;
1568                 $relocate["poll"] = $xpath->query("dfrn:poll/text()", $relocation)->item(0)->nodeValue;
1569                 $relocate["sitepubkey"] = $xpath->query("dfrn:sitepubkey/text()", $relocation)->item(0)->nodeValue;
1570
1571                 if (($relocate["avatar"] == "") AND ($relocate["photo"] != ""))
1572                         $relocate["avatar"] = $relocate["photo"];
1573
1574                 if ($relocate["addr"] == "")
1575                         $relocate["addr"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$3@$2", $relocate["url"]);
1576
1577                 // update contact
1578                 $r = q("SELECT `photo`, `url` FROM `contact` WHERE `id` = %d AND `uid` = %d;",
1579                         intval($importer["id"]),
1580                         intval($importer["importer_uid"]));
1581                 if (!$r)
1582                         return false;
1583
1584                 $old = $r[0];
1585
1586                 // Update the gcontact entry
1587                 $relocate["server_url"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $relocate["url"]);
1588
1589                 $x = q("UPDATE `gcontact` SET
1590                                         `name` = '%s',
1591                                         `photo` = '%s',
1592                                         `url` = '%s',
1593                                         `nurl` = '%s',
1594                                         `addr` = '%s',
1595                                         `connect` = '%s',
1596                                         `notify` = '%s',
1597                                         `server_url` = '%s'
1598                         WHERE `nurl` = '%s';",
1599                                         dbesc($relocate["name"]),
1600                                         dbesc($relocate["avatar"]),
1601                                         dbesc($relocate["url"]),
1602                                         dbesc(normalise_link($relocate["url"])),
1603                                         dbesc($relocate["addr"]),
1604                                         dbesc($relocate["addr"]),
1605                                         dbesc($relocate["notify"]),
1606                                         dbesc($relocate["server_url"]),
1607                                         dbesc(normalise_link($old["url"])));
1608
1609                 // Update the contact table. We try to find every entry.
1610                 $x = q("UPDATE `contact` SET
1611                                         `name` = '%s',
1612                                         `avatar` = '%s',
1613                                         `url` = '%s',
1614                                         `nurl` = '%s',
1615                                         `addr` = '%s',
1616                                         `request` = '%s',
1617                                         `confirm` = '%s',
1618                                         `notify` = '%s',
1619                                         `poll` = '%s',
1620                                         `site-pubkey` = '%s'
1621                         WHERE (`id` = %d AND `uid` = %d) OR (`nurl` = '%s');",
1622                                         dbesc($relocate["name"]),
1623                                         dbesc($relocate["avatar"]),
1624                                         dbesc($relocate["url"]),
1625                                         dbesc(normalise_link($relocate["url"])),
1626                                         dbesc($relocate["addr"]),
1627                                         dbesc($relocate["request"]),
1628                                         dbesc($relocate["confirm"]),
1629                                         dbesc($relocate["notify"]),
1630                                         dbesc($relocate["poll"]),
1631                                         dbesc($relocate["sitepubkey"]),
1632                                         intval($importer["id"]),
1633                                         intval($importer["importer_uid"]),
1634                                         dbesc(normalise_link($old["url"])));
1635
1636                 update_contact_avatar($relocate["avatar"], $importer["importer_uid"], $importer["id"], true);
1637
1638                 if ($x === false)
1639                         return false;
1640
1641                 // update items
1642                 /// @todo This is an extreme performance killer
1643                 $fields = array(
1644                         'owner-link' => array($old["url"], $relocate["url"]),
1645                         'author-link' => array($old["url"], $relocate["url"]),
1646                         //'owner-avatar' => array($old["photo"], $relocate["photo"]),
1647                         //'author-avatar' => array($old["photo"], $relocate["photo"]),
1648                         );
1649                 foreach ($fields as $n=>$f) {
1650                         $r = q("SELECT `id` FROM `item` WHERE `%s` = '%s' AND `uid` = %d LIMIT 1",
1651                                         $n, dbesc($f[0]),
1652                                         intval($importer["importer_uid"]));
1653
1654                         if ($r) {
1655                                 $x = q("UPDATE `item` SET `%s` = '%s' WHERE `%s` = '%s' AND `uid` = %d",
1656                                                 $n, dbesc($f[1]),
1657                                                 $n, dbesc($f[0]),
1658                                                 intval($importer["importer_uid"]));
1659                                         if ($x === false)
1660                                                 return false;
1661                         }
1662                 }
1663
1664                 /// @TODO
1665                 /// merge with current record, current contents have priority
1666                 /// update record, set url-updated
1667                 /// update profile photos
1668                 /// schedule a scan?
1669                 return true;
1670         }
1671
1672         /**
1673          * @brief Updates an item
1674          *
1675          * @param array $current the current item record
1676          * @param array $item the new item record
1677          * @param array $importer Record of the importer user mixed with contact of the content
1678          * @param int $entrytype Is it a toplevel entry, a comment or a relayed comment?
1679          */
1680         private function update_content($current, $item, $importer, $entrytype) {
1681                 $changed = false;
1682
1683                 if (edited_timestamp_is_newer($current, $item)) {
1684
1685                         // do not accept (ignore) an earlier edit than one we currently have.
1686                         if(datetime_convert("UTC","UTC",$item["edited"]) < $current["edited"])
1687                                 return(false);
1688
1689                         $r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s', `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d",
1690                                 dbesc($item["title"]),
1691                                 dbesc($item["body"]),
1692                                 dbesc($item["tag"]),
1693                                 dbesc(datetime_convert("UTC","UTC",$item["edited"])),
1694                                 dbesc(datetime_convert()),
1695                                 dbesc($item["uri"]),
1696                                 intval($importer["importer_uid"])
1697                         );
1698                         create_tags_from_itemuri($item["uri"], $importer["importer_uid"]);
1699                         update_thread_uri($item["uri"], $importer["importer_uid"]);
1700
1701                         $changed = true;
1702
1703                         if ($entrytype == DFRN_REPLY_RC)
1704                                 proc_run(PRIORITY_HIGH, "include/notifier.php","comment-import", $current["id"]);
1705                 }
1706
1707                 // update last-child if it changes
1708                 if($item["last-child"] AND ($item["last-child"] != $current["last-child"])) {
1709                         $r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
1710                                 dbesc(datetime_convert()),
1711                                 dbesc($item["parent-uri"]),
1712                                 intval($importer["importer_uid"])
1713                         );
1714                         $r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d",
1715                                 intval($item["last-child"]),
1716                                 dbesc(datetime_convert()),
1717                                 dbesc($item["uri"]),
1718                                 intval($importer["importer_uid"])
1719                         );
1720                 }
1721                 return $changed;
1722         }
1723
1724         /**
1725          * @brief Detects the entry type of the item
1726          *
1727          * @param array $importer Record of the importer user mixed with contact of the content
1728          * @param array $item the new item record
1729          *
1730          * @return int Is it a toplevel entry, a comment or a relayed comment?
1731          */
1732         private function get_entry_type($importer, $item) {
1733                 if ($item["parent-uri"] != $item["uri"]) {
1734                         $community = false;
1735
1736                         if($importer["page-flags"] == PAGE_COMMUNITY || $importer["page-flags"] == PAGE_PRVGROUP) {
1737                                 $sql_extra = "";
1738                                 $community = true;
1739                                 logger("possible community action");
1740                         } else
1741                                 $sql_extra = " AND `contact`.`self` AND `item`.`wall` ";
1742
1743                         // was the top-level post for this action written by somebody on this site?
1744                         // Specifically, the recipient?
1745
1746                         $is_a_remote_action = false;
1747
1748                         $r = q("SELECT `item`.`parent-uri` FROM `item`
1749                                 WHERE `item`.`uri` = '%s'
1750                                 LIMIT 1",
1751                                 dbesc($item["parent-uri"])
1752                         );
1753                         if($r && count($r)) {
1754                                 $r = q("SELECT `item`.`forum_mode`, `item`.`wall` FROM `item`
1755                                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
1756                                         WHERE `item`.`uri` = '%s' AND (`item`.`parent-uri` = '%s' OR `item`.`thr-parent` = '%s')
1757                                         AND `item`.`uid` = %d
1758                                         $sql_extra
1759                                         LIMIT 1",
1760                                         dbesc($r[0]["parent-uri"]),
1761                                         dbesc($r[0]["parent-uri"]),
1762                                         dbesc($r[0]["parent-uri"]),
1763                                         intval($importer["importer_uid"])
1764                                 );
1765                                 if($r && count($r))
1766                                         $is_a_remote_action = true;
1767                         }
1768
1769                         // Does this have the characteristics of a community or private group action?
1770                         // If it's an action to a wall post on a community/prvgroup page it's a
1771                         // valid community action. Also forum_mode makes it valid for sure.
1772                         // If neither, it's not.
1773
1774                         if($is_a_remote_action && $community) {
1775                                 if((!$r[0]["forum_mode"]) && (!$r[0]["wall"])) {
1776                                         $is_a_remote_action = false;
1777                                         logger("not a community action");
1778                                 }
1779                         }
1780
1781                         if ($is_a_remote_action)
1782                                 return DFRN_REPLY_RC;
1783                         else
1784                                 return DFRN_REPLY;
1785
1786                 } else
1787                         return DFRN_TOP_LEVEL;
1788
1789         }
1790
1791         /**
1792          * @brief Send a "poke"
1793          *
1794          * @param array $item the new item record
1795          * @param array $importer Record of the importer user mixed with contact of the content
1796          * @param int $posted_id The record number of item record that was just posted
1797          */
1798         private function do_poke($item, $importer, $posted_id) {
1799                 $verb = urldecode(substr($item["verb"],strpos($item["verb"], "#")+1));
1800                 if(!$verb)
1801                         return;
1802                 $xo = parse_xml_string($item["object"],false);
1803
1804                 if(($xo->type == ACTIVITY_OBJ_PERSON) && ($xo->id)) {
1805
1806                         // somebody was poked/prodded. Was it me?
1807                         foreach($xo->link as $l) {
1808                                 $atts = $l->attributes();
1809                                 switch($atts["rel"]) {
1810                                         case "alternate":
1811                                                 $Blink = $atts["href"];
1812                                                 break;
1813                                         default:
1814                                                 break;
1815                                 }
1816                         }
1817
1818                         if($Blink && link_compare($Blink,App::get_baseurl()."/profile/".$importer["nickname"])) {
1819
1820                                 // send a notification
1821                                 notification(array(
1822                                         "type"         => NOTIFY_POKE,
1823                                         "notify_flags" => $importer["notify-flags"],
1824                                         "language"     => $importer["language"],
1825                                         "to_name"      => $importer["username"],
1826                                         "to_email"     => $importer["email"],
1827                                         "uid"          => $importer["importer_uid"],
1828                                         "item"         => $item,
1829                                         "link"         => App::get_baseurl()."/display/".urlencode(get_item_guid($posted_id)),
1830                                         "source_name"  => stripslashes($item["author-name"]),
1831                                         "source_link"  => $item["author-link"],
1832                                         "source_photo" => ((link_compare($item["author-link"],$importer["url"]))
1833                                                 ? $importer["thumb"] : $item["author-avatar"]),
1834                                         "verb"         => $item["verb"],
1835                                         "otype"        => "person",
1836                                         "activity"     => $verb,
1837                                         "parent"       => $item["parent"]
1838                                 ));
1839                         }
1840                 }
1841         }
1842
1843         /**
1844          * @brief Processes several actions, depending on the verb
1845          *
1846          * @param int $entrytype Is it a toplevel entry, a comment or a relayed comment?
1847          * @param array $importer Record of the importer user mixed with contact of the content
1848          * @param array $item the new item record
1849          * @param bool $is_like Is the verb a "like"?
1850          *
1851          * @return bool Should the processing of the entries be continued?
1852          */
1853         private function process_verbs($entrytype, $importer, &$item, &$is_like) {
1854
1855                 logger("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, LOGGER_DEBUG);
1856
1857                 if (($entrytype == DFRN_TOP_LEVEL)) {
1858                         // The filling of the the "contact" variable is done for legcy reasons
1859                         // The functions below are partly used by ostatus.php as well - where we have this variable
1860                         $r = q("SELECT * FROM `contact` WHERE `id` = %d", intval($importer["id"]));
1861                         $contact = $r[0];
1862                         $nickname = $contact["nick"];
1863
1864                         // Big question: Do we need these functions? They were part of the "consume_feed" function.
1865                         // This function once was responsible for DFRN and OStatus.
1866                         if(activity_match($item["verb"],ACTIVITY_FOLLOW)) {
1867                                 logger("New follower");
1868                                 new_follower($importer, $contact, $item, $nickname);
1869                                 return false;
1870                         }
1871                         if(activity_match($item["verb"],ACTIVITY_UNFOLLOW))  {
1872                                 logger("Lost follower");
1873                                 lose_follower($importer, $contact, $item);
1874                                 return false;
1875                         }
1876                         if(activity_match($item["verb"],ACTIVITY_REQ_FRIEND)) {
1877                                 logger("New friend request");
1878                                 new_follower($importer, $contact, $item, $nickname, true);
1879                                 return false;
1880                         }
1881                         if(activity_match($item["verb"],ACTIVITY_UNFRIEND))  {
1882                                 logger("Lost sharer");
1883                                 lose_sharer($importer, $contact, $item);
1884                                 return false;
1885                         }
1886                 } else {
1887                         if(($item["verb"] == ACTIVITY_LIKE)
1888                                 || ($item["verb"] == ACTIVITY_DISLIKE)
1889                                 || ($item["verb"] == ACTIVITY_ATTEND)
1890                                 || ($item["verb"] == ACTIVITY_ATTENDNO)
1891                                 || ($item["verb"] == ACTIVITY_ATTENDMAYBE)) {
1892                                 $is_like = true;
1893                                 $item["type"] = "activity";
1894                                 $item["gravity"] = GRAVITY_LIKE;
1895                                 // only one like or dislike per person
1896                                 // splitted into two queries for performance issues
1897                                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `parent-uri` = '%s' AND NOT `deleted` LIMIT 1",
1898                                         intval($item["uid"]),
1899                                         dbesc($item["author-link"]),
1900                                         dbesc($item["verb"]),
1901                                         dbesc($item["parent-uri"])
1902                                 );
1903                                 if($r && count($r))
1904                                         return false;
1905
1906                                 $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `author-link` = '%s' AND `verb` = '%s' AND `thr-parent` = '%s' AND NOT `deleted` LIMIT 1",
1907                                         intval($item["uid"]),
1908                                         dbesc($item["author-link"]),
1909                                         dbesc($item["verb"]),
1910                                         dbesc($item["parent-uri"])
1911                                 );
1912                                 if($r && count($r))
1913                                         return false;
1914                         } else
1915                                 $is_like = false;
1916
1917                         if(($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
1918
1919                                 $xo = parse_xml_string($item["object"],false);
1920                                 $xt = parse_xml_string($item["target"],false);
1921
1922                                 if($xt->type == ACTIVITY_OBJ_NOTE) {
1923                                         $r = q("SELECT `id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1924                                                 dbesc($xt->id),
1925                                                 intval($importer["importer_uid"])
1926                                         );
1927
1928                                         if(!count($r))
1929                                                 return false;
1930
1931                                         // extract tag, if not duplicate, add to parent item
1932                                         if($xo->content) {
1933                                                 if(!(stristr($r[0]["tag"],trim($xo->content)))) {
1934                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
1935                                                                 dbesc($r[0]["tag"] . (strlen($r[0]["tag"]) ? ',' : '') . '#[url=' . $xo->id . ']'. $xo->content . '[/url]'),
1936                                                                 intval($r[0]["id"])
1937                                                         );
1938                                                         create_tags_from_item($r[0]["id"]);
1939                                                 }
1940                                         }
1941                                 }
1942                         }
1943                 }
1944                 return true;
1945         }
1946
1947         /**
1948          * @brief Processes the link elements
1949          *
1950          * @param object $links link elements
1951          * @param array $item the item record
1952          */
1953         private function parse_links($links, &$item) {
1954                 $rel = "";
1955                 $href = "";
1956                 $type = "";
1957                 $length = "0";
1958                 $title = "";
1959                 foreach ($links AS $link) {
1960                         foreach($link->attributes AS $attributes) {
1961                                 if ($attributes->name == "href")
1962                                         $href = $attributes->textContent;
1963                                 if ($attributes->name == "rel")
1964                                         $rel = $attributes->textContent;
1965                                 if ($attributes->name == "type")
1966                                         $type = $attributes->textContent;
1967                                 if ($attributes->name == "length")
1968                                         $length = $attributes->textContent;
1969                                 if ($attributes->name == "title")
1970                                         $title = $attributes->textContent;
1971                         }
1972                         if (($rel != "") AND ($href != ""))
1973                                 switch($rel) {
1974                                         case "alternate":
1975                                                 $item["plink"] = $href;
1976                                                 break;
1977                                         case "enclosure":
1978                                                 $enclosure = $href;
1979                                                 if(strlen($item["attach"]))
1980                                                         $item["attach"] .= ",";
1981
1982                                                 $item["attach"] .= '[attach]href="'.$href.'" length="'.$length.'" type="'.$type.'" title="'.$title.'"[/attach]';
1983                                                 break;
1984                                 }
1985                 }
1986         }
1987
1988         /**
1989          * @brief Processes the entry elements which contain the items and comments
1990          *
1991          * @param array $header Array of the header elements that always stay the same
1992          * @param object $xpath XPath object
1993          * @param object $entry entry elements
1994          * @param array $importer Record of the importer user mixed with contact of the content
1995          */
1996         private function process_entry($header, $xpath, $entry, $importer) {
1997
1998                 logger("Processing entries");
1999
2000                 $item = $header;
2001
2002                 // Get the uri
2003                 $item["uri"] = $xpath->query("atom:id/text()", $entry)->item(0)->nodeValue;
2004
2005                 // Fetch the owner
2006                 $owner = self::fetchauthor($xpath, $entry, $importer, "dfrn:owner", true);
2007
2008                 $item["owner-name"] = $owner["name"];
2009                 $item["owner-link"] = $owner["link"];
2010                 $item["owner-avatar"] = $owner["avatar"];
2011
2012                 // fetch the author
2013                 $author = self::fetchauthor($xpath, $entry, $importer, "atom:author", true);
2014
2015                 $item["author-name"] = $author["name"];
2016                 $item["author-link"] = $author["link"];
2017                 $item["author-avatar"] = $author["avatar"];
2018
2019                 $item["title"] = $xpath->query("atom:title/text()", $entry)->item(0)->nodeValue;
2020
2021                 $item["created"] = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2022                 $item["edited"] = $xpath->query("atom:updated/text()", $entry)->item(0)->nodeValue;
2023
2024                 $item["body"] = $xpath->query("dfrn:env/text()", $entry)->item(0)->nodeValue;
2025                 $item["body"] = str_replace(array(' ',"\t","\r","\n"), array('','','',''),$item["body"]);
2026                 // make sure nobody is trying to sneak some html tags by us
2027                 $item["body"] = notags(base64url_decode($item["body"]));
2028
2029                 $item["body"] = limit_body_size($item["body"]);
2030
2031                 /// @todo Do we really need this check for HTML elements? (It was copied from the old function)
2032                 if((strpos($item['body'],'<') !== false) && (strpos($item['body'],'>') !== false)) {
2033
2034                         $item['body'] = reltoabs($item['body'],$base_url);
2035
2036                         $item['body'] = html2bb_video($item['body']);
2037
2038                         $item['body'] = oembed_html2bbcode($item['body']);
2039
2040                         $config = HTMLPurifier_Config::createDefault();
2041                         $config->set('Cache.DefinitionImpl', null);
2042
2043                         // we shouldn't need a whitelist, because the bbcode converter
2044                         // will strip out any unsupported tags.
2045
2046                         $purifier = new HTMLPurifier($config);
2047                         $item['body'] = $purifier->purify($item['body']);
2048
2049                         $item['body'] = @html2bbcode($item['body']);
2050                 }
2051
2052                 /// @todo We should check for a repeated post and if we know the repeated author.
2053
2054                 // We don't need the content element since "dfrn:env" is always present
2055                 //$item["body"] = $xpath->query("atom:content/text()", $entry)->item(0)->nodeValue;
2056
2057                 $item["last-child"] = $xpath->query("dfrn:comment-allow/text()", $entry)->item(0)->nodeValue;
2058                 $item["location"] = $xpath->query("dfrn:location/text()", $entry)->item(0)->nodeValue;
2059
2060                 $georsspoint = $xpath->query("georss:point", $entry);
2061                 if ($georsspoint)
2062                         $item["coord"] = $georsspoint->item(0)->nodeValue;
2063
2064                 $item["private"] = $xpath->query("dfrn:private/text()", $entry)->item(0)->nodeValue;
2065
2066                 $item["extid"] = $xpath->query("dfrn:extid/text()", $entry)->item(0)->nodeValue;
2067
2068                 if ($xpath->query("dfrn:bookmark/text()", $entry)->item(0)->nodeValue == "true")
2069                         $item["bookmark"] = true;
2070
2071                 $notice_info = $xpath->query("statusnet:notice_info", $entry);
2072                 if ($notice_info AND ($notice_info->length > 0)) {
2073                         foreach($notice_info->item(0)->attributes AS $attributes) {
2074                                 if ($attributes->name == "source")
2075                                         $item["app"] = strip_tags($attributes->textContent);
2076                         }
2077                 }
2078
2079                 $item["guid"] = $xpath->query("dfrn:diaspora_guid/text()", $entry)->item(0)->nodeValue;
2080
2081                 // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "item_store"
2082                 $dsprsig = unxmlify($xpath->query("dfrn:diaspora_signature/text()", $entry)->item(0)->nodeValue);
2083                 if ($dsprsig != "")
2084                         $item["dsprsig"] = $dsprsig;
2085
2086                 $item["verb"] = $xpath->query("activity:verb/text()", $entry)->item(0)->nodeValue;
2087
2088                 if ($xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue != "")
2089                         $item["object-type"] = $xpath->query("activity:object-type/text()", $entry)->item(0)->nodeValue;
2090
2091                 $object = $xpath->query("activity:object", $entry)->item(0);
2092                 $item["object"] = self::transform_activity($xpath, $object, "object");
2093
2094                 if (trim($item["object"]) != "") {
2095                         $r = parse_xml_string($item["object"], false);
2096                         if (isset($r->type))
2097                                 $item["object-type"] = $r->type;
2098                 }
2099
2100                 $target = $xpath->query("activity:target", $entry)->item(0);
2101                 $item["target"] = self::transform_activity($xpath, $target, "target");
2102
2103                 $categories = $xpath->query("atom:category", $entry);
2104                 if ($categories) {
2105                         foreach ($categories AS $category) {
2106                                 $term = "";
2107                                 $scheme = "";
2108                                 foreach($category->attributes AS $attributes) {
2109                                         if ($attributes->name == "term")
2110                                                 $term = $attributes->textContent;
2111
2112                                         if ($attributes->name == "scheme")
2113                                                 $scheme = $attributes->textContent;
2114                                 }
2115
2116                                 if (($term != "") AND ($scheme != "")) {
2117                                         $parts = explode(":", $scheme);
2118                                         if ((count($parts) >= 4) AND (array_shift($parts) == "X-DFRN")) {
2119                                                 $termhash = array_shift($parts);
2120                                                 $termurl = implode(":", $parts);
2121
2122                                                 if(strlen($item["tag"]))
2123                                                         $item["tag"] .= ",";
2124
2125                                                 $item["tag"] .= $termhash."[url=".$termurl."]".$term."[/url]";
2126                                         }
2127                                 }
2128                         }
2129                 }
2130
2131                 $enclosure = "";
2132
2133                 $links = $xpath->query("atom:link", $entry);
2134                 if ($links)
2135                         self::parse_links($links, $item);
2136
2137                 // Is it a reply or a top level posting?
2138                 $item["parent-uri"] = $item["uri"];
2139
2140                 $inreplyto = $xpath->query("thr:in-reply-to", $entry);
2141                 if (is_object($inreplyto->item(0)))
2142                         foreach($inreplyto->item(0)->attributes AS $attributes)
2143                                 if ($attributes->name == "ref")
2144                                         $item["parent-uri"] = $attributes->textContent;
2145
2146                 // Get the type of the item (Top level post, reply or remote reply)
2147                 $entrytype = self::get_entry_type($importer, $item);
2148
2149                 // Now assign the rest of the values that depend on the type of the message
2150                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2151                         if (!isset($item["object-type"]))
2152                                 $item["object-type"] = ACTIVITY_OBJ_COMMENT;
2153
2154                         if ($item["contact-id"] != $owner["contact-id"])
2155                                 $item["contact-id"] = $owner["contact-id"];
2156
2157                         if (($item["network"] != $owner["network"]) AND ($owner["network"] != ""))
2158                                 $item["network"] = $owner["network"];
2159
2160                         if ($item["contact-id"] != $author["contact-id"])
2161                                 $item["contact-id"] = $author["contact-id"];
2162
2163                         if (($item["network"] != $author["network"]) AND ($author["network"] != ""))
2164                                 $item["network"] = $author["network"];
2165
2166                         // This code was taken from the old DFRN code
2167                         // When activated, forums don't work.
2168                         // And: Why should we disallow commenting by followers?
2169                         // the behaviour is now similar to the Diaspora part.
2170                         //if($importer["rel"] == CONTACT_IS_FOLLOWER) {
2171                         //      logger("Contact ".$importer["id"]." is only follower. Quitting", LOGGER_DEBUG);
2172                         //      return;
2173                         //}
2174                 }
2175
2176                 if ($entrytype == DFRN_REPLY_RC) {
2177                         $item["type"] = "remote-comment";
2178                         $item["wall"] = 1;
2179                 } elseif ($entrytype == DFRN_TOP_LEVEL) {
2180                         if (!isset($item["object-type"]))
2181                                 $item["object-type"] = ACTIVITY_OBJ_NOTE;
2182
2183                         // Is it an event?
2184                         if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2185                                 logger("Item ".$item["uri"]." seems to contain an event.", LOGGER_DEBUG);
2186                                 $ev = bbtoevent($item["body"]);
2187                                 if((x($ev, "desc") || x($ev, "summary")) && x($ev, "start")) {
2188                                         logger("Event in item ".$item["uri"]." was found.", LOGGER_DEBUG);
2189                                         $ev["cid"] = $importer["id"];
2190                                         $ev["uid"] = $importer["uid"];
2191                                         $ev["uri"] = $item["uri"];
2192                                         $ev["edited"] = $item["edited"];
2193                                         $ev['private'] = $item['private'];
2194                                         $ev["guid"] = $item["guid"];
2195
2196                                         $r = q("SELECT `id` FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2197                                                 dbesc($item["uri"]),
2198                                                 intval($importer["uid"])
2199                                         );
2200                                         if(count($r))
2201                                                 $ev["id"] = $r[0]["id"];
2202
2203                                         $event_id = event_store($ev);
2204                                         logger("Event ".$event_id." was stored", LOGGER_DEBUG);
2205                                         return;
2206                                 }
2207                         }
2208                 }
2209
2210                 $r = q("SELECT `id`, `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2211                         dbesc($item["uri"]),
2212                         intval($importer["importer_uid"])
2213                 );
2214
2215                 if (!self::process_verbs($entrytype, $importer, $item, $is_like)) {
2216                         logger("Exiting because 'process_verbs' told us so", LOGGER_DEBUG);
2217                         return;
2218                 }
2219
2220                 // Update content if 'updated' changes
2221                 if(count($r)) {
2222                         if (self::update_content($r[0], $item, $importer, $entrytype))
2223                                 logger("Item ".$item["uri"]." was updated.", LOGGER_DEBUG);
2224                         else
2225                                 logger("Item ".$item["uri"]." already existed.", LOGGER_DEBUG);
2226                         return;
2227                 }
2228
2229                 if (in_array($entrytype, array(DFRN_REPLY, DFRN_REPLY_RC))) {
2230                         $posted_id = item_store($item);
2231                         $parent = 0;
2232
2233                         if($posted_id) {
2234
2235                                 logger("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, LOGGER_DEBUG);
2236
2237                                 $item["id"] = $posted_id;
2238
2239                                 $r = q("SELECT `parent`, `parent-uri` FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
2240                                         intval($posted_id),
2241                                         intval($importer["importer_uid"])
2242                                 );
2243                                 if(count($r)) {
2244                                         $parent = $r[0]["parent"];
2245                                         $parent_uri = $r[0]["parent-uri"];
2246                                 }
2247
2248                                 if(!$is_like) {
2249                                         $r1 = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `uid` = %d AND `parent` = %d",
2250                                                 dbesc(datetime_convert()),
2251                                                 intval($importer["importer_uid"]),
2252                                                 intval($r[0]["parent"])
2253                                         );
2254
2255                                         $r2 = q("UPDATE `item` SET `last-child` = 1, `changed` = '%s' WHERE `uid` = %d AND `id` = %d",
2256                                                 dbesc(datetime_convert()),
2257                                                 intval($importer["importer_uid"]),
2258                                                 intval($posted_id)
2259                                         );
2260                                 }
2261
2262                                 if($posted_id AND $parent AND ($entrytype == DFRN_REPLY_RC)) {
2263                                         logger("Notifying followers about comment ".$posted_id, LOGGER_DEBUG);
2264                                         proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $posted_id);
2265                                 }
2266
2267                                 return true;
2268                         }
2269                 } else { // $entrytype == DFRN_TOP_LEVEL
2270                         if(!link_compare($item["owner-link"],$importer["url"])) {
2271                                 // The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery,
2272                                 // but otherwise there's a possible data mixup on the sender's system.
2273                                 // the tgroup delivery code called from item_store will correct it if it's a forum,
2274                                 // but we're going to unconditionally correct it here so that the post will always be owned by our contact.
2275                                 logger('Correcting item owner.', LOGGER_DEBUG);
2276                                 $item["owner-name"]   = $importer["senderName"];
2277                                 $item["owner-link"]   = $importer["url"];
2278                                 $item["owner-avatar"] = $importer["thumb"];
2279                         }
2280
2281                         if(($importer["rel"] == CONTACT_IS_FOLLOWER) && (!tgroup_check($importer["importer_uid"], $item))) {
2282                                 logger("Contact ".$importer["id"]." is only follower and tgroup check was negative.", LOGGER_DEBUG);
2283                                 return;
2284                         }
2285
2286                         // This is my contact on another system, but it's really me.
2287                         // Turn this into a wall post.
2288                         $notify = item_is_remote_self($importer, $item);
2289
2290                         $posted_id = item_store($item, false, $notify);
2291
2292                         logger("Item was stored with id ".$posted_id, LOGGER_DEBUG);
2293
2294                         if(stristr($item["verb"],ACTIVITY_POKE))
2295                                 self::do_poke($item, $importer, $posted_id);
2296                 }
2297         }
2298
2299         /**
2300          * @brief Deletes items
2301          *
2302          * @param object $xpath XPath object
2303          * @param object $deletion deletion elements
2304          * @param array $importer Record of the importer user mixed with contact of the content
2305          */
2306         private function process_deletion($xpath, $deletion, $importer) {
2307
2308                 logger("Processing deletions");
2309
2310                 foreach($deletion->attributes AS $attributes) {
2311                         if ($attributes->name == "ref")
2312                                 $uri = $attributes->textContent;
2313                         if ($attributes->name == "when")
2314                                 $when = $attributes->textContent;
2315                 }
2316                 if ($when)
2317                         $when = datetime_convert("UTC", "UTC", $when, "Y-m-d H:i:s");
2318                 else
2319                         $when = datetime_convert("UTC", "UTC", "now", "Y-m-d H:i:s");
2320
2321                 if (!$uri OR !$importer["id"])
2322                         return false;
2323
2324                 /// @todo Only select the used fields
2325                 $r = q("SELECT `item`.*, `contact`.`self` FROM `item` INNER JOIN `contact` on `item`.`contact-id` = `contact`.`id`
2326                                 WHERE `uri` = '%s' AND `item`.`uid` = %d AND `contact-id` = %d AND NOT `item`.`file` LIKE '%%[%%' LIMIT 1",
2327                                 dbesc($uri),
2328                                 intval($importer["uid"]),
2329                                 intval($importer["id"])
2330                         );
2331                 if(!count($r)) {
2332                         logger("Item with uri ".$uri." from contact ".$importer["id"]." for user ".$importer["uid"]." wasn't found.", LOGGER_DEBUG);
2333                         return;
2334                 } else {
2335
2336                         $item = $r[0];
2337
2338                         $entrytype = self::get_entry_type($importer, $item);
2339
2340                         if(!$item["deleted"])
2341                                 logger('deleting item '.$item["id"].' uri='.$uri, LOGGER_DEBUG);
2342                         else
2343                                 return;
2344
2345                         if($item["object-type"] == ACTIVITY_OBJ_EVENT) {
2346                                 logger("Deleting event ".$item["event-id"], LOGGER_DEBUG);
2347                                 event_delete($item["event-id"]);
2348                         }
2349
2350                         if(($item["verb"] == ACTIVITY_TAG) && ($item["object-type"] == ACTIVITY_OBJ_TAGTERM)) {
2351
2352                                 $xo = parse_xml_string($item["object"],false);
2353                                 $xt = parse_xml_string($item["target"],false);
2354
2355                                 if($xt->type == ACTIVITY_OBJ_NOTE) {
2356                                         $i = q("SELECT `id`, `contact-id`, `tag` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
2357                                                 dbesc($xt->id),
2358                                                 intval($importer["importer_uid"])
2359                                         );
2360                                         if(count($i)) {
2361
2362                                                 // For tags, the owner cannot remove the tag on the author's copy of the post.
2363
2364                                                 $owner_remove = (($item["contact-id"] == $i[0]["contact-id"]) ? true: false);
2365                                                 $author_remove = (($item["origin"] && $item["self"]) ? true : false);
2366                                                 $author_copy = (($item["origin"]) ? true : false);
2367
2368                                                 if($owner_remove && $author_copy)
2369                                                         return;
2370                                                 if($author_remove || $owner_remove) {
2371                                                         $tags = explode(',',$i[0]["tag"]);
2372                                                         $newtags = array();
2373                                                         if(count($tags)) {
2374                                                                 foreach($tags as $tag)
2375                                                                         if(trim($tag) !== trim($xo->body))
2376                                                                                 $newtags[] = trim($tag);
2377                                                         }
2378                                                         q("UPDATE `item` SET `tag` = '%s' WHERE `id` = %d",
2379                                                                 dbesc(implode(',',$newtags)),
2380                                                                 intval($i[0]["id"])
2381                                                         );
2382                                                         create_tags_from_item($i[0]["id"]);
2383                                                 }
2384                                         }
2385                                 }
2386                         }
2387
2388                         if($entrytype == DFRN_TOP_LEVEL) {
2389                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2390                                                 `body` = '', `title` = ''
2391                                         WHERE `parent-uri` = '%s' AND `uid` = %d",
2392                                                 dbesc($when),
2393                                                 dbesc(datetime_convert()),
2394                                                 dbesc($uri),
2395                                                 intval($importer["uid"])
2396                                         );
2397                                 create_tags_from_itemuri($uri, $importer["uid"]);
2398                                 create_files_from_itemuri($uri, $importer["uid"]);
2399                                 update_thread_uri($uri, $importer["uid"]);
2400                         } else {
2401                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
2402                                                 `body` = '', `title` = ''
2403                                         WHERE `uri` = '%s' AND `uid` = %d",
2404                                                 dbesc($when),
2405                                                 dbesc(datetime_convert()),
2406                                                 dbesc($uri),
2407                                                 intval($importer["uid"])
2408                                         );
2409                                 create_tags_from_itemuri($uri, $importer["uid"]);
2410                                 create_files_from_itemuri($uri, $importer["uid"]);
2411                                 update_thread_uri($uri, $importer["importer_uid"]);
2412                                 if($item["last-child"]) {
2413                                         // ensure that last-child is set in case the comment that had it just got wiped.
2414                                         q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
2415                                                 dbesc(datetime_convert()),
2416                                                 dbesc($item["parent-uri"]),
2417                                                 intval($item["uid"])
2418                                         );
2419                                         // who is the last child now?
2420                                         $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `moderated` = 0 AND `uid` = %d
2421                                                 ORDER BY `created` DESC LIMIT 1",
2422                                                         dbesc($item["parent-uri"]),
2423                                                         intval($importer["uid"])
2424                                         );
2425                                         if(count($r)) {
2426                                                 q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d",
2427                                                         intval($r[0]["id"])
2428                                                 );
2429                                         }
2430                                 }
2431                                 // if this is a relayed delete, propagate it to other recipients
2432
2433                                 if($entrytype == DFRN_REPLY_RC) {
2434                                         logger("Notifying followers about deletion of post ".$item["id"], LOGGER_DEBUG);
2435                                         proc_run(PRIORITY_HIGH, "include/notifier.php","drop", $item["id"]);
2436                                 }
2437                         }
2438                 }
2439         }
2440
2441         /**
2442          * @brief Imports a DFRN message
2443          *
2444          * @param text $xml The DFRN message
2445          * @param array $importer Record of the importer user mixed with contact of the content
2446          * @param bool $sort_by_date Is used when feeds are polled
2447          */
2448         public static function import($xml,$importer, $sort_by_date = false) {
2449
2450                 if ($xml == "")
2451                         return;
2452
2453                 if($importer["readonly"]) {
2454                         // We aren't receiving stuff from this person. But we will quietly ignore them
2455                         // rather than a blatant "go away" message.
2456                         logger('ignoring contact '.$importer["id"]);
2457                         return;
2458                 }
2459
2460                 $doc = new DOMDocument();
2461                 @$doc->loadXML($xml);
2462
2463                 $xpath = new DomXPath($doc);
2464                 $xpath->registerNamespace("atom", NAMESPACE_ATOM1);
2465                 $xpath->registerNamespace("thr", NAMESPACE_THREAD);
2466                 $xpath->registerNamespace("at", NAMESPACE_TOMB);
2467                 $xpath->registerNamespace("media", NAMESPACE_MEDIA);
2468                 $xpath->registerNamespace("dfrn", NAMESPACE_DFRN);
2469                 $xpath->registerNamespace("activity", NAMESPACE_ACTIVITY);
2470                 $xpath->registerNamespace("georss", NAMESPACE_GEORSS);
2471                 $xpath->registerNamespace("poco", NAMESPACE_POCO);
2472                 $xpath->registerNamespace("ostatus", NAMESPACE_OSTATUS);
2473                 $xpath->registerNamespace("statusnet", NAMESPACE_STATUSNET);
2474
2475                 $header = array();
2476                 $header["uid"] = $importer["uid"];
2477                 $header["network"] = NETWORK_DFRN;
2478                 $header["type"] = "remote";
2479                 $header["wall"] = 0;
2480                 $header["origin"] = 0;
2481                 $header["contact-id"] = $importer["id"];
2482
2483                 // Update the contact table if the data has changed
2484
2485                 // The "atom:author" is only present in feeds
2486                 if ($xpath->query("/atom:feed/atom:author")->length > 0)
2487                         self::fetchauthor($xpath, $doc->firstChild, $importer, "atom:author", false, $xml);
2488
2489                 // Only the "dfrn:owner" in the head section contains all data
2490                 if ($xpath->query("/atom:feed/dfrn:owner")->length > 0)
2491                         self::fetchauthor($xpath, $doc->firstChild, $importer, "dfrn:owner", false, $xml);
2492
2493                 logger("Import DFRN message for user ".$importer["uid"]." from contact ".$importer["id"], LOGGER_DEBUG);
2494
2495                 // is it a public forum? Private forums aren't supported by now with this method
2496                 $forum = intval($xpath->evaluate("/atom:feed/dfrn:community/text()", $context)->item(0)->nodeValue);
2497
2498                 if ($forum != $importer["forum"])
2499                         q("UPDATE `contact` SET `forum` = %d WHERE `forum` != %d AND `id` = %d",
2500                                 intval($forum), intval($forum),
2501                                 intval($importer["id"])
2502                         );
2503
2504                 $mails = $xpath->query("/atom:feed/dfrn:mail");
2505                 foreach ($mails AS $mail)
2506                         self::process_mail($xpath, $mail, $importer);
2507
2508                 $suggestions = $xpath->query("/atom:feed/dfrn:suggest");
2509                 foreach ($suggestions AS $suggestion)
2510                         self::process_suggestion($xpath, $suggestion, $importer);
2511
2512                 $relocations = $xpath->query("/atom:feed/dfrn:relocate");
2513                 foreach ($relocations AS $relocation)
2514                         self::process_relocation($xpath, $relocation, $importer);
2515
2516                 $deletions = $xpath->query("/atom:feed/at:deleted-entry");
2517                 foreach ($deletions AS $deletion)
2518                         self::process_deletion($xpath, $deletion, $importer);
2519
2520                 if (!$sort_by_date) {
2521                         $entries = $xpath->query("/atom:feed/atom:entry");
2522                         foreach ($entries AS $entry)
2523                                 self::process_entry($header, $xpath, $entry, $importer);
2524                 } else {
2525                         $newentries = array();
2526                         $entries = $xpath->query("/atom:feed/atom:entry");
2527                         foreach ($entries AS $entry) {
2528                                 $created = $xpath->query("atom:published/text()", $entry)->item(0)->nodeValue;
2529                                 $newentries[strtotime($created)] = $entry;
2530                         }
2531
2532                         // Now sort after the publishing date
2533                         ksort($newentries);
2534
2535                         foreach ($newentries AS $entry)
2536                                 self::process_entry($header, $xpath, $entry, $importer);
2537                 }
2538                 logger("Import done for user ".$importer["uid"]." from contact ".$importer["id"], LOGGER_DEBUG);
2539         }
2540 }
2541 ?>