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