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