include/dfrn.php

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