include/dfrn.php

   1 <?php
   2 require_once('include/items.php');
   3 require_once('include/Contact.php');
   4 require_once('include/ostatus.php');
   5
   6 /**
   7  * @brief Generates the atom entries for delivery.php
   8  *
   9  * This function is used whenever content is transmitted via DFRN.
  10  *
  11  * @param array $items Item elements
  12  * @param array $owner Owner record
  13  *
  14  * @return string DFRN entries
  15  */
  16 function dfrn_entries($items,$owner) {
  17
  18         $doc = new DOMDocument('1.0', 'utf-8');
  19         $doc->formatOutput = true;
  20
  21         $root = dfrn_add_header($doc, $owner, "dfrn:owner", "", false);
  22
  23         if(! count($items))
  24                 return trim($doc->saveXML());
  25
  26         foreach($items as $item) {
  27                 $entry = dfrn_entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
  28                 $root->appendChild($entry);
  29         }
  30
  31         return(trim($doc->saveXML()));
  32 }
  33
  34 /**
  35  * @brief Generate an atom feed for the given user
  36  *
  37  * This function is called when another server is pulling data from the user feed.
  38  *
  39  * @param App $a
  40  * @param string $dfrn_id
  41  * @param string $owner_nick Owner nick name
  42  * @param string $last_update Date of the last update
  43  * @param int $direction
  44  *
  45  * @return string DFRN feed entries
  46  */
  47 function dfrn_feed(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {
  48
  49         $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
  50         $public_feed = (($dfrn_id) ? false : true);
  51         $starred     = false;   // not yet implemented, possible security issues
  52         $converse    = false;
  53
  54         if($public_feed && $a->argc > 2) {
  55                 for($x = 2; $x < $a->argc; $x++) {
  56                         if($a->argv[$x] == 'converse')
  57                                 $converse = true;
  58                         if($a->argv[$x] == 'starred')
  59                                 $starred = true;
  60                         if($a->argv[$x] === 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1]))
  61                                 $category = $a->argv[$x+1];
  62                 }
  63         }
  64
  65
  66
  67         // default permissions - anonymous user
  68
  69         $sql_extra = " AND `item`.`allow_cid` = '' AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = '' ";
  70
  71         $r = q("SELECT `contact`.*, `user`.`uid` AS `user_uid`, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
  72                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
  73                 WHERE `contact`.`self` = 1 AND `user`.`nickname` = '%s' LIMIT 1",
  74                 dbesc($owner_nick)
  75         );
  76
  77         if(! count($r))
  78                 killme();
  79
  80         $owner = $r[0];
  81         $owner_id = $owner['user_uid'];
  82         $owner_nick = $owner['nickname'];
  83
  84         $sql_post_table = "";
  85         $visibility = "";
  86
  87         if(! $public_feed) {
  88
  89                 $sql_extra = '';
  90                 switch($direction) {
  91                         case (-1):
  92                                 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
  93                                 $my_id = $dfrn_id;
  94                                 break;
  95                         case 0:
  96                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  97                                 $my_id = '1:' . $dfrn_id;
  98                                 break;
  99                         case 1:
 100                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 101                                 $my_id = '0:' . $dfrn_id;
 102                                 break;
 103                         default:
 104                                 return false;
 105                                 break; // NOTREACHED
 106                 }
 107
 108                 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 109                         intval($owner_id)
 110                 );
 111
 112                 if(! count($r))
 113                         killme();
 114
 115                 $contact = $r[0];
 116                 require_once('include/security.php');
 117                 $groups = init_groups_visitor($contact['id']);
 118
 119                 if(count($groups)) {
 120                         for($x = 0; $x < count($groups); $x ++)
 121                                 $groups[$x] = '<' . intval($groups[$x]) . '>' ;
 122                         $gs = implode('|', $groups);
 123                 }
 124                 else
 125                         $gs = '<<>>' ; // Impossible to match
 126
 127                 $sql_extra = sprintf("
 128                         AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
 129                         AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
 130                         AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
 131                         AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
 132                 ",
 133                         intval($contact['id']),
 134                         intval($contact['id']),
 135                         dbesc($gs),
 136                         dbesc($gs)
 137                 );
 138         }
 139
 140         if($public_feed)
 141                 $sort = 'DESC';
 142         else
 143                 $sort = 'ASC';
 144
 145         $date_field = "`changed`";
 146         $sql_order = "`item`.`parent` ".$sort.", `item`.`created` ASC";
 147
 148         if(! strlen($last_update))
 149                 $last_update = 'now -30 days';
 150
 151         if(isset($category)) {
 152                 $sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 153                                 dbesc(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($owner_id));
 154                 //$sql_extra .= file_tag_file_query('item',$category,'category');
 155         }
 156
 157         if($public_feed) {
 158                 if(! $converse)
 159                         $sql_extra .= " AND `contact`.`self` = 1 ";
 160         }
 161
 162         $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
 163
 164         //      AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
 165         //      dbesc($check_date),
 166
 167         $r = q("SELECT STRAIGHT_JOIN `item`.*, `item`.`id` AS `item_id`,
 168                 `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 169                 `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 170                 `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 171                 `contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`,
 172                 `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 173                 FROM `item` $sql_post_table
 174                 INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 175                 AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 176                 LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 177                 WHERE `item`.`uid` = %d AND `item`.`visible` = 1 and `item`.`moderated` = 0 AND `item`.`parent` != 0
 178                 AND ((`item`.`wall` = 1) $visibility) AND `item`.$date_field > '%s'
 179                 $sql_extra
 180                 ORDER BY $sql_order LIMIT 0, 300",
 181                 intval($owner_id),
 182                 dbesc($check_date),
 183                 dbesc($sort)
 184         );
 185
 186         // Will check further below if this actually returned results.
 187         // We will provide an empty feed if that is the case.
 188
 189         $items = $r;
 190
 191         $doc = new DOMDocument('1.0', 'utf-8');
 192         $doc->formatOutput = true;
 193
 194         $alternatelink = $owner['url'];
 195
 196         if(isset($category))
 197                 $alternatelink .= "/category/".$category;
 198
 199         if ($public_feed)
 200                 $author = "dfrn:owner";
 201         else
 202                 $author = "author";
 203
 204         $root = dfrn_add_header($doc, $owner, $author, $alternatelink, true);
 205
 206         // This hook can't work anymore
 207         //      call_hooks('atom_feed', $atom);
 208
 209         if(! count($items)) {
 210                 $atom = trim($doc->saveXML());
 211
 212                 call_hooks('atom_feed_end', $atom);
 213
 214                 return $atom;
 215         }
 216
 217         foreach($items as $item) {
 218
 219                 // prevent private email from leaking.
 220                 if($item['network'] === NETWORK_MAIL)
 221                         continue;
 222
 223                 // public feeds get html, our own nodes use bbcode
 224
 225                 if($public_feed) {
 226                         $type = 'html';
 227                         // catch any email that's in a public conversation and make sure it doesn't leak
 228                         if($item['private'])
 229                                 continue;
 230                 }
 231                 else {
 232                         $type = 'text';
 233                 }
 234
 235                 $entry = dfrn_entry($doc, $type, $item, $owner, true);
 236                 $root->appendChild($entry);
 237
 238         }
 239
 240         $atom = trim($doc->saveXML());
 241
 242         call_hooks('atom_feed_end', $atom);
 243
 244         return $atom;
 245 }
 246
 247 /**
 248  * @brief Create XML text for DFRN mails
 249  *
 250  * @param array $item message elements
 251  * @param array $owner Owner record
 252  *
 253  * @return string DFRN mail
 254  */
 255 function dfrn_mail($item, $owner) {
 256         $doc = new DOMDocument('1.0', 'utf-8');
 257         $doc->formatOutput = true;
 258
 259         $root = dfrn_add_header($doc, $owner, "dfrn:owner", "", false);
 260
 261         $mail = $doc->createElement("dfrn:mail");
 262         $sender = $doc->createElement("dfrn:sender");
 263
 264         xml_add_element($doc, $sender, "dfrn:name", $owner['name']);
 265         xml_add_element($doc, $sender, "dfrn:uri", $owner['url']);
 266         xml_add_element($doc, $sender, "dfrn:avatar", $owner['thumb']);
 267
 268         $mail->appendChild($sender);
 269
 270         xml_add_element($doc, $mail, "dfrn:id", $item['uri']);
 271         xml_add_element($doc, $mail, "dfrn:in-reply-to", $item['parent-uri']);
 272         xml_add_element($doc, $mail, "dfrn:sentdate", datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME));
 273         xml_add_element($doc, $mail, "dfrn:subject", $item['title']);
 274         xml_add_element($doc, $mail, "dfrn:content", $item['body']);
 275
 276         $root->appendChild($mail);
 277
 278         return(trim($doc->saveXML()));
 279 }
 280
 281 /**
 282  * @brief Create XML text for DFRN friend suggestions
 283  *
 284  * @param array $item suggestion elements
 285  * @param array $owner Owner record
 286  *
 287  * @return string DFRN suggestions
 288  */
 289 function dfrn_fsuggest($item, $owner) {
 290         $doc = new DOMDocument('1.0', 'utf-8');
 291         $doc->formatOutput = true;
 292
 293         $root = dfrn_add_header($doc, $owner, "dfrn:owner", "", false);
 294
 295         $suggest = $doc->createElement("dfrn:suggest");
 296
 297         xml_add_element($doc, $suggest, "dfrn:url", $item['url']);
 298         xml_add_element($doc, $suggest, "dfrn:name", $item['name']);
 299         xml_add_element($doc, $suggest, "dfrn:photo", $item['photo']);
 300         xml_add_element($doc, $suggest, "dfrn:request", $item['request']);
 301         xml_add_element($doc, $suggest, "dfrn:note", $item['note']);
 302
 303         $root->appendChild($suggest);
 304
 305         return(trim($doc->saveXML()));
 306 }
 307
 308 /**
 309  * @brief Create XML text for DFRN relocations
 310  *
 311  * @param array $owner Owner record
 312  * @param int $uid User ID
 313  *
 314  * @return string DFRN relocations
 315  */
 316 function dfrn_relocate($owner, $uid) {
 317
 318         $a = get_app();
 319
 320         /* get site pubkey. this could be a new installation with no site keys*/
 321         $pubkey = get_config('system','site_pubkey');
 322         if(! $pubkey) {
 323                 $res = new_keypair(1024);
 324                 set_config('system','site_prvkey', $res['prvkey']);
 325                 set_config('system','site_pubkey', $res['pubkey']);
 326         }
 327
 328         $rp = q("SELECT `resource-id` , `scale`, type FROM `photo`
 329                         WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;", $uid);
 330         $photos = array();
 331         $ext = Photo::supportedTypes();
 332         foreach($rp as $p){
 333                 $photos[$p['scale']] = $a->get_baseurl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 334         }
 335         unset($rp, $ext);
 336
 337         $doc = new DOMDocument('1.0', 'utf-8');
 338         $doc->formatOutput = true;
 339
 340         $root = dfrn_add_header($doc, $owner, "dfrn:owner", "", false);
 341
 342         $relocate = $doc->createElement("dfrn:relocate");
 343
 344         xml_add_element($doc, $relocate, "dfrn:url", $owner['url']);
 345         xml_add_element($doc, $relocate, "dfrn:name", $owner['name']);
 346         xml_add_element($doc, $relocate, "dfrn:photo", $photos[4]);
 347         xml_add_element($doc, $relocate, "dfrn:thumb", $photos[5]);
 348         xml_add_element($doc, $relocate, "dfrn:micro", $photos[6]);
 349         xml_add_element($doc, $relocate, "dfrn:request", $owner['request']);
 350         xml_add_element($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 351         xml_add_element($doc, $relocate, "dfrn:notify", $owner['notify']);
 352         xml_add_element($doc, $relocate, "dfrn:poll", $owner['poll']);
 353         xml_add_element($doc, $relocate, "dfrn:sitepubkey", get_config('system','site_pubkey'));
 354
 355         $root->appendChild($relocate);
 356
 357         return(trim($doc->saveXML()));
 358 }
 359
 360 /**
 361  * @brief Adds the header elements for the DFRN protocol
 362  *
 363  * @param object $doc XML document
 364  * @param array $owner Owner record
 365  * @param string $authorelement Element name for the author
 366  * @param string $alternatelink link to profile or category
 367  * @param bool $public Is it a header for public posts?
 368  *
 369  * @return object XML root object
 370  */
 371 function dfrn_add_header($doc, $owner, $authorelement, $alternatelink = "", $public = false) {
 372         $a = get_app();
 373
 374         if ($alternatelink == "")
 375                 $alternatelink = $owner['url'];
 376
 377         $root = $doc->createElementNS(NS_ATOM, 'feed');
 378         $doc->appendChild($root);
 379
 380         $root->setAttribute("xmlns:thr", NS_THR);
 381         $root->setAttribute("xmlns:at", "http://purl.org/atompub/tombstones/1.0");
 382         $root->setAttribute("xmlns:media", NS_MEDIA);
 383         $root->setAttribute("xmlns:dfrn", "http://purl.org/macgirvin/dfrn/1.0");
 384         $root->setAttribute("xmlns:activity", NS_ACTIVITY);
 385         $root->setAttribute("xmlns:georss", NS_GEORSS);
 386         $root->setAttribute("xmlns:poco", NS_POCO);
 387         $root->setAttribute("xmlns:ostatus", NS_OSTATUS);
 388         $root->setAttribute("xmlns:statusnet", NS_STATUSNET);
 389
 390         xml_add_element($doc, $root, "id", $a->get_baseurl()."/profile/".$owner["nick"]);
 391         xml_add_element($doc, $root, "title", $owner["name"]);
 392
 393         $attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
 394         xml_add_element($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 395
 396         $attributes = array("rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/");
 397         xml_add_element($doc, $root, "link", "", $attributes);
 398
 399         $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $alternatelink);
 400         xml_add_element($doc, $root, "link", "", $attributes);
 401
 402         ostatus_hublinks($doc, $root);
 403
 404         if ($public) {
 405                 $attributes = array("rel" => "salmon", "href" => $a->get_baseurl()."/salmon/".$owner["nick"]);
 406                 xml_add_element($doc, $root, "link", "", $attributes);
 407
 408                 $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => $a->get_baseurl()."/salmon/".$owner["nick"]);
 409                 xml_add_element($doc, $root, "link", "", $attributes);
 410
 411                 $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => $a->get_baseurl()."/salmon/".$owner["nick"]);
 412                 xml_add_element($doc, $root, "link", "", $attributes);
 413         }
 414
 415         if ($owner['page-flags'] == PAGE_COMMUNITY)
 416                 xml_add_element($doc, $root, "dfrn:community", 1);
 417
 418         xml_add_element($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
 419
 420         $author = dfrn_add_author($doc, $owner, $authorelement, $public);
 421         $root->appendChild($author);
 422
 423         return $root;
 424 }
 425
 426 /**
 427  * @brief Adds the author element in the header for the DFRN protocol
 428  *
 429  * @param object $doc XML document
 430  * @param array $owner Owner record
 431  * @param string $authorelement Element name for the author
 432  *
 433  * @return object XML author object
 434  */
 435 function dfrn_add_author($doc, $owner, $authorelement, $public) {
 436         $a = get_app();
 437
 438         $author = $doc->createElement($authorelement);
 439
 440         $namdate = datetime_convert('UTC', 'UTC', $owner['name-date'].'+00:00' , ATOM_TIME);
 441         $uridate = datetime_convert('UTC', 'UTC', $owner['uri-date'].'+00:00', ATOM_TIME);
 442         $picdate = datetime_convert('UTC', 'UTC', $owner['avatar-date'].'+00:00', ATOM_TIME);
 443
 444         $attributes = array("dfrn:updated" => $namdate);
 445         xml_add_element($doc, $author, "name", $owner["name"], $attributes);
 446
 447         $attributes = array("dfrn:updated" => $namdate);
 448         xml_add_element($doc, $author, "uri", $a->get_baseurl().'/profile/'.$owner["nickname"], $attributes);
 449
 450         $attributes = array("rel" => "photo", "type" => "image/jpeg", "dfrn:updated" => $picdate,
 451                                 "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 452         xml_add_element($doc, $author, "link", "", $attributes);
 453
 454         $attributes = array("rel" => "avatar", "type" => "image/jpeg", "dfrn:updated" => $picdate,
 455                                 "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 456         xml_add_element($doc, $author, "link", "", $attributes);
 457
 458         $birthday = feed_birthday($owner['user_uid'], $owner['timezone']);
 459
 460         if ($birthday)
 461                 xml_add_element($doc, $author, "dfrn:birthday", $birthday);
 462
 463         // The following fields will only be generated if this isn't for a public feed
 464         if ($public)
 465                 return $author;
 466
 467         // Only show contact details when we are allowed to
 468         $r = q("SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`, `user`.`timezone`,
 469                         `profile`.`locality`, `profile`.`region`, `profile`.`country-name`, `profile`.`pub_keywords`, `profile`.`dob`
 470                 FROM `profile`
 471                         INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 472                         WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 473                 intval($owner['user_uid']));
 474         if ($r) {
 475                 $profile = $r[0];
 476                 xml_add_element($doc, $author, "poco:displayName", $profile["name"]);
 477                 xml_add_element($doc, $author, "poco:updated", $namdate);
 478
 479                 if (trim($profile["dob"]) != "0000-00-00")
 480                         xml_add_element($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 481
 482                 xml_add_element($doc, $author, "poco:note", $profile["about"]);
 483                 xml_add_element($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 484
 485                 $savetz = date_default_timezone_get();
 486                 date_default_timezone_set($profile["timezone"]);
 487                 xml_add_element($doc, $author, "poco:utcOffset", date("P"));
 488                 date_default_timezone_set($savetz);
 489
 490                 if (trim($profile["homepage"]) != "") {
 491                         $urls = $doc->createElement("poco:urls");
 492                         xml_add_element($doc, $urls, "poco:type", "homepage");
 493                         xml_add_element($doc, $urls, "poco:value", $profile["homepage"]);
 494                         xml_add_element($doc, $urls, "poco:primary", "true");
 495                         $author->appendChild($urls);
 496                 }
 497
 498                 if (trim($profile["pub_keywords"]) != "") {
 499                         $keywords = explode(",", $profile["pub_keywords"]);
 500
 501                         foreach ($keywords AS $keyword)
 502                                 xml_add_element($doc, $author, "poco:tags", trim($keyword));
 503
 504                 }
 505
 506                 /// @todo When we are having the XMPP address in the profile we should propagate it here
 507                 $xmpp = "";
 508                 if (trim($xmpp) != "") {
 509                         $ims = $doc->createElement("poco:ims");
 510                         xml_add_element($doc, $ims, "poco:type", "xmpp");
 511                         xml_add_element($doc, $ims, "poco:value", $xmpp);
 512                         xml_add_element($doc, $ims, "poco:primary", "true");
 513                         $author->appendChild($ims);
 514                 }
 515
 516                 if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 517                         $element = $doc->createElement("poco:address");
 518
 519                         xml_add_element($doc, $element, "poco:formatted", formatted_location($profile));
 520
 521                         if (trim($profile["locality"]) != "")
 522                                 xml_add_element($doc, $element, "poco:locality", $profile["locality"]);
 523
 524                         if (trim($profile["region"]) != "")
 525                                 xml_add_element($doc, $element, "poco:region", $profile["region"]);
 526
 527                         if (trim($profile["country-name"]) != "")
 528                                 xml_add_element($doc, $element, "poco:country", $profile["country-name"]);
 529
 530                         $author->appendChild($element);
 531                 }
 532         }
 533
 534         return $author;
 535 }
 536
 537 /**
 538  * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 539  *
 540  * @param object $doc XML document
 541  * @param string $element Element name for the author
 542  * @param string $contact_url Link of the contact
 543  * @param array $items Item elements
 544  *
 545  * @return object XML author object
 546  */
 547 function dfrn_add_entry_author($doc, $element, $contact_url, $item) {
 548         $a = get_app();
 549
 550         $contact = get_contact_details_by_url($contact_url, $item["uid"]);
 551
 552         $author = $doc->createElement($element);
 553         xml_add_element($doc, $author, "name", $contact["name"]);
 554         xml_add_element($doc, $author, "uri", $contact["url"]);
 555
 556         /// @Todo
 557         /// - Check real image type and image size
 558         /// - Check which of these boths elements we should use
 559         $attributes = array(
 560                         "rel" => "photo",
 561                         "type" => "image/jpeg",
 562                         "media:width" => 80,
 563                         "media:height" => 80,
 564                         "href" => $contact["photo"]);
 565         xml_add_element($doc, $author, "link", "", $attributes);
 566
 567         $attributes = array(
 568                         "rel" => "avatar",
 569                         "type" => "image/jpeg",
 570                         "media:width" => 80,
 571                         "media:height" => 80,
 572                         "href" => $contact["photo"]);
 573         xml_add_element($doc, $author, "link", "", $attributes);
 574
 575         return $author;
 576 }
 577
 578 /**
 579  * @brief Adds the activity elements
 580  *
 581  * @param object $doc XML document
 582  * @param string $element Element name for the activity
 583  * @param string $activity activity value
 584  *
 585  * @return object XML activity object
 586  */
 587 function dfrn_create_activity($doc, $element, $activity) {
 588
 589         if($activity) {
 590                 $entry = $doc->createElement($element);
 591
 592                 $r = parse_xml_string($activity, false);
 593                 if(!$r)
 594                         return false;
 595                 if($r->type)
 596                         xml_add_element($doc, $entry, "activity:object-type", $r->type);
 597                 if($r->id)
 598                         xml_add_element($doc, $entry, "id", $r->id);
 599                 if($r->title)
 600                         xml_add_element($doc, $entry, "title", $r->title);
 601                 if($r->link) {
 602                         if(substr($r->link,0,1) === '<') {
 603                                 if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
 604                                         $r->link = str_replace('&','&amp;', $r->link);
 605
 606                                 $r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
 607
 608                                 $data = parse_xml_string($r->link, false);
 609                                 foreach ($data->attributes() AS $parameter => $value)
 610                                         $attributes[$parameter] = $value;
 611                         } else
 612                                 $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $r->link);
 613
 614                         xml_add_element($doc, $entry, "link", "", $attributes);
 615                 }
 616                 if($r->content)
 617                         xml_add_element($doc, $entry, "content", bbcode($r->content), array("type" => "html"));
 618
 619                 return $entry;
 620         }
 621
 622         return false;
 623 }
 624
 625 /**
 626  * @brief Adds the elements for attachments
 627  *
 628  * @param object $doc XML document
 629  * @param object $root XML root
 630  * @param array $item Item element
 631  *
 632  * @return object XML attachment object
 633  */
 634 function dfrn_get_attachment($doc, $root, $item) {
 635         $arr = explode('[/attach],',$item['attach']);
 636         if(count($arr)) {
 637                 foreach($arr as $r) {
 638                         $matches = false;
 639                         $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|',$r,$matches);
 640                         if($cnt) {
 641                                 $attributes = array("rel" => "enclosure",
 642                                                 "href" => $matches[1],
 643                                                 "type" => $matches[3]);
 644
 645                                 if(intval($matches[2]))
 646                                         $attributes["length"] = intval($matches[2]);
 647
 648                                 if(trim($matches[4]) != "")
 649                                         $attributes["title"] = trim($matches[4]);
 650
 651                                 xml_add_element($doc, $root, "link", "", $attributes);
 652                         }
 653                 }
 654         }
 655 }
 656
 657 /**
 658  * @brief Adds the "entry" elements for the DFRN protocol
 659  *
 660  * @param object $doc XML document
 661  * @param string $type "text" or "html"
 662  * @param array $item Item element
 663  * @param array $owner Owner record
 664  * @param bool $comment Trigger the sending of the "comment" element
 665  * @param int $cid
 666  *
 667  * @return object XML entry object
 668  */
 669 function dfrn_entry($doc, $type, $item, $owner, $comment = false, $cid = 0) {
 670         $a = get_app();
 671
 672         $mentioned = array();
 673
 674         if(!$item['parent'])
 675                 return;
 676
 677         if($item['deleted']) {
 678                 $attributes = array("ref" => $item['uri'], "when" => datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME));
 679                 return xml_create_element($doc, "at:deleted-entry", "", $attributes);
 680         }
 681
 682         $entry = $doc->createElement("entry");
 683
 684         if($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid'])
 685                 $body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
 686         else
 687                 $body = $item['body'];
 688
 689         if ($type == 'html') {
 690                 $htmlbody = $body;
 691
 692                 if ($item['title'] != "")
 693                         $htmlbody = "[b]".$item['title']."[/b]\n\n".$htmlbody;
 694
 695                 $htmlbody = bbcode($htmlbody, false, false, 7);
 696         }
 697
 698         $author = dfrn_add_entry_author($doc, "author", $item["author-link"], $item);
 699         $entry->appendChild($author);
 700
 701         $dfrnowner = dfrn_add_entry_author($doc, "dfrn:owner", $item["owner-link"], $item);
 702         $entry->appendChild($dfrnowner);
 703
 704         if(($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 705                 $parent = q("SELECT `guid` FROM `item` WHERE `id` = %d", intval($item["parent"]));
 706                 $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 707                 $attributes = array("ref" => $parent_item, "type" => "text/html", "href" => $a->get_baseurl().'/display/'.$parent[0]['guid']);
 708                 xml_add_element($doc, $entry, "thr:in-reply-to", "", $attributes);
 709         }
 710
 711         xml_add_element($doc, $entry, "id", $item["uri"]);
 712         xml_add_element($doc, $entry, "title", $item["title"]);
 713
 714         xml_add_element($doc, $entry, "published", datetime_convert("UTC","UTC",$item["created"]."+00:00",ATOM_TIME));
 715         xml_add_element($doc, $entry, "updated", datetime_convert("UTC","UTC",$item["edited"]."+00:00",ATOM_TIME));
 716
 717         xml_add_element($doc, $entry, "dfrn:env", base64url_encode($body, true));
 718         xml_add_element($doc, $entry, "content", (($type === 'html') ? $htmlbody : $body), array("type" => $type));
 719
 720         xml_add_element($doc, $entry, "link", "", array("rel" => "alternate", "type" => "text/html",
 721                                                         "href" => $a->get_baseurl()."/display/".$item["guid"]));
 722
 723         if ($comment)
 724                 xml_add_element($doc, $entry, "dfrn:comment-allow", intval($item['last-child']));
 725
 726         if($item['location'])
 727                 xml_add_element($doc, $entry, "dfrn:location", $item['location']);
 728
 729         if($item['coord'])
 730                 xml_add_element($doc, $entry, "georss:point", $item['coord']);
 731
 732         if(($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid']))
 733                 xml_add_element($doc, $entry, "dfrn:private", (($item['private']) ? $item['private'] : 1));
 734
 735         if($item['extid'])
 736                 xml_add_element($doc, $entry, "dfrn:extid", $item['extid']);
 737
 738         if($item['bookmark'])
 739                 xml_add_element($doc, $entry, "dfrn:bookmark", "true");
 740
 741         if($item['app'])
 742                 xml_add_element($doc, $entry, "statusnet:notice_info", "", array("local_id" => $item['id'], "source" => $item['app']));
 743
 744         xml_add_element($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
 745
 746         if($item['signed_text']) {
 747                 $sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
 748                 xml_add_element($doc, $entry, "dfrn:diaspora_signature", $sign);
 749         }
 750
 751         xml_add_element($doc, $entry, "activity:verb", construct_verb($item));
 752
 753         $actobj = dfrn_create_activity($doc, "activity:object", $item['object']);
 754         if ($actobj)
 755                 $entry->appendChild($actobj);
 756
 757         $actarg = dfrn_create_activity($doc, "activity:target", $item['target']);
 758         if ($actarg)
 759                 $entry->appendChild($actarg);
 760
 761         $tags = item_getfeedtags($item);
 762
 763         if(count($tags)) {
 764                 foreach($tags as $t)
 765                         if (($type != 'html') OR ($t[0] != "@"))
 766                                 xml_add_element($doc, $entry, "category", "", array("scheme" => "X-DFRN:".$t[0].":".$t[1], "term" => $t[2]));
 767         }
 768
 769         if(count($tags))
 770                 foreach($tags as $t)
 771                         if ($t[0] == "@")
 772                                 $mentioned[$t[1]] = $t[1];
 773
 774         foreach ($mentioned AS $mention) {
 775                 $r = q("SELECT `forum`, `prv` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s'",
 776                         intval($owner["uid"]),
 777                         dbesc(normalise_link($mention)));
 778                 if ($r[0]["forum"] OR $r[0]["prv"])
 779                         xml_add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 780                                                                                 "ostatus:object-type" => ACTIVITY_OBJ_GROUP,
 781                                                                                 "href" => $mention));
 782                 else
 783                         xml_add_element($doc, $entry, "link", "", array("rel" => "mentioned",
 784                                                                                 "ostatus:object-type" => ACTIVITY_OBJ_PERSON,
 785                                                                                 "href" => $mention));
 786         }
 787
 788         dfrn_get_attachment($doc, $entry, $item);
 789
 790         return $entry;
 791 }