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 class dfrn {
   7
   8         /**
   9          * @brief Generates the atom entries for delivery.php
  10          *
  11          * This function is used whenever content is transmitted via DFRN.
  12          *
  13          * @param array $items Item elements
  14          * @param array $owner Owner record
  15          *
  16          * @return string DFRN entries
  17          */
  18         function entries($items,$owner) {
  19
  20                 $doc = new DOMDocument('1.0', 'utf-8');
  21                 $doc->formatOutput = true;
  22
  23                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
  24
  25                 if(! count($items))
  26                         return trim($doc->saveXML());
  27
  28                 foreach($items as $item) {
  29                         $entry = self::entry($doc, "text", $item, $owner, $item["entry:comment-allow"], $item["entry:cid"]);
  30                         $root->appendChild($entry);
  31                 }
  32
  33                 return(trim($doc->saveXML()));
  34         }
  35
  36         /**
  37          * @brief Generate an atom feed for the given user
  38          *
  39          * This function is called when another server is pulling data from the user feed.
  40          *
  41          * @param string $dfrn_id DFRN ID from the requesting party
  42          * @param string $owner_nick Owner nick name
  43          * @param string $last_update Date of the last update
  44          * @param int $direction Can be -1, 0 or 1.
  45          *
  46          * @return string DFRN feed entries
  47          */
  48         function feed($dfrn_id, $owner_nick, $last_update, $direction = 0) {
  49
  50                 $a = get_app();
  51
  52                 $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
  53                 $public_feed = (($dfrn_id) ? false : true);
  54                 $starred     = false;   // not yet implemented, possible security issues
  55                 $converse    = false;
  56
  57                 if($public_feed && $a->argc > 2) {
  58                         for($x = 2; $x < $a->argc; $x++) {
  59                                 if($a->argv[$x] == 'converse')
  60                                         $converse = true;
  61                                 if($a->argv[$x] == 'starred')
  62                                         $starred = true;
  63                                 if($a->argv[$x] === 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1]))
  64                                         $category = $a->argv[$x+1];
  65                         }
  66                 }
  67
  68
  69
  70                 // default permissions - anonymous user
  71
  72                 $sql_extra = " AND `item`.`allow_cid` = '' AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = '' ";
  73
  74                 $r = q("SELECT `contact`.*, `user`.`uid` AS `user_uid`, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
  75                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
  76                         WHERE `contact`.`self` = 1 AND `user`.`nickname` = '%s' LIMIT 1",
  77                         dbesc($owner_nick)
  78                 );
  79
  80                 if(! count($r))
  81                         killme();
  82
  83                 $owner = $r[0];
  84                 $owner_id = $owner['user_uid'];
  85                 $owner_nick = $owner['nickname'];
  86
  87                 $sql_post_table = "";
  88                 $visibility = "";
  89
  90                 if(! $public_feed) {
  91
  92                         $sql_extra = '';
  93                         switch($direction) {
  94                                 case (-1):
  95                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
  96                                         $my_id = $dfrn_id;
  97                                         break;
  98                                 case 0:
  99                                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 100                                         $my_id = '1:' . $dfrn_id;
 101                                         break;
 102                                 case 1:
 103                                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 104                                         $my_id = '0:' . $dfrn_id;
 105                                         break;
 106                                 default:
 107                                         return false;
 108                                         break; // NOTREACHED
 109                         }
 110
 111                         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `contact`.`uid` = %d $sql_extra LIMIT 1",
 112                                 intval($owner_id)
 113                         );
 114
 115                         if(! count($r))
 116                                 killme();
 117
 118                         $contact = $r[0];
 119                         require_once('include/security.php');
 120                         $groups = init_groups_visitor($contact['id']);
 121
 122                         if(count($groups)) {
 123                                 for($x = 0; $x < count($groups); $x ++)
 124                                         $groups[$x] = '<' . intval($groups[$x]) . '>' ;
 125                                 $gs = implode('|', $groups);
 126                         } else
 127                                 $gs = '<<>>' ; // Impossible to match
 128
 129                         $sql_extra = sprintf("
 130                                 AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
 131                                 AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
 132                                 AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
 133                                 AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
 134                         ",
 135                                 intval($contact['id']),
 136                                 intval($contact['id']),
 137                                 dbesc($gs),
 138                                 dbesc($gs)
 139                         );
 140                 }
 141
 142                 if($public_feed)
 143                         $sort = 'DESC';
 144                 else
 145                         $sort = 'ASC';
 146
 147                 $date_field = "`changed`";
 148                 $sql_order = "`item`.`parent` ".$sort.", `item`.`created` ASC";
 149
 150                 if(! strlen($last_update))
 151                         $last_update = 'now -30 days';
 152
 153                 if(isset($category)) {
 154                         $sql_post_table = sprintf("INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
 155                                         dbesc(protect_sprintf($category)), intval(TERM_OBJ_POST), intval(TERM_CATEGORY), intval($owner_id));
 156                         //$sql_extra .= file_tag_file_query('item',$category,'category');
 157                 }
 158
 159                 if($public_feed) {
 160                         if(! $converse)
 161                                 $sql_extra .= " AND `contact`.`self` = 1 ";
 162                 }
 163
 164                 $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
 165
 166                 //      AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
 167                 //      dbesc($check_date),
 168
 169                 $r = q("SELECT STRAIGHT_JOIN `item`.*, `item`.`id` AS `item_id`,
 170                         `contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`,
 171                         `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 172                         `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 173                         `contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`,
 174                         `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 175                         FROM `item` $sql_post_table
 176                         INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 177                         AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 178                         LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 179                         WHERE `item`.`uid` = %d AND `item`.`visible` = 1 and `item`.`moderated` = 0 AND `item`.`parent` != 0
 180                         AND ((`item`.`wall` = 1) $visibility) AND `item`.$date_field > '%s'
 181                         $sql_extra
 182                         ORDER BY $sql_order LIMIT 0, 300",
 183                         intval($owner_id),
 184                         dbesc($check_date),
 185                         dbesc($sort)
 186                 );
 187
 188                 // Will check further below if this actually returned results.
 189                 // We will provide an empty feed if that is the case.
 190
 191                 $items = $r;
 192
 193                 $doc = new DOMDocument('1.0', 'utf-8');
 194                 $doc->formatOutput = true;
 195
 196                 $alternatelink = $owner['url'];
 197
 198                 if(isset($category))
 199                         $alternatelink .= "/category/".$category;
 200
 201                 if ($public_feed)
 202                         $author = "dfrn:owner";
 203                 else
 204                         $author = "author";
 205
 206                 $root = self::add_header($doc, $owner, $author, $alternatelink, true);
 207
 208                 // This hook can't work anymore
 209                 //      call_hooks('atom_feed', $atom);
 210
 211                 if(! count($items)) {
 212                         $atom = trim($doc->saveXML());
 213
 214                         call_hooks('atom_feed_end', $atom);
 215
 216                         return $atom;
 217                 }
 218
 219                 foreach($items as $item) {
 220
 221                         // prevent private email from leaking.
 222                         if($item['network'] === NETWORK_MAIL)
 223                                 continue;
 224
 225                         // public feeds get html, our own nodes use bbcode
 226
 227                         if($public_feed) {
 228                                 $type = 'html';
 229                                 // catch any email that's in a public conversation and make sure it doesn't leak
 230                                 if($item['private'])
 231                                         continue;
 232                         } else
 233                                 $type = 'text';
 234
 235                         $entry = self::entry($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 $owner Owner record
 252          *
 253          * @return string DFRN mail
 254          */
 255         function mail($item, $owner) {
 256                 $doc = new DOMDocument('1.0', 'utf-8');
 257                 $doc->formatOutput = true;
 258
 259                 $root = self::add_header($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 $owner Owner record
 286          *
 287          * @return string DFRN suggestions
 288          */
 289         function fsuggest($item, $owner) {
 290                 $doc = new DOMDocument('1.0', 'utf-8');
 291                 $doc->formatOutput = true;
 292
 293                 $root = self::add_header($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 $uid User ID
 313          *
 314          * @return string DFRN relocations
 315          */
 316         function relocate($owner, $uid) {
 317
 318                 /* get site pubkey. this could be a new installation with no site keys*/
 319                 $pubkey = get_config('system','site_pubkey');
 320                 if(! $pubkey) {
 321                         $res = new_keypair(1024);
 322                         set_config('system','site_prvkey', $res['prvkey']);
 323                         set_config('system','site_pubkey', $res['pubkey']);
 324                 }
 325
 326                 $rp = q("SELECT `resource-id` , `scale`, type FROM `photo`
 327                                 WHERE `profile` = 1 AND `uid` = %d ORDER BY scale;", $uid);
 328                 $photos = array();
 329                 $ext = Photo::supportedTypes();
 330
 331                 foreach($rp as $p)
 332                         $photos[$p['scale']] = app::get_baseurl().'/photo/'.$p['resource-id'].'-'.$p['scale'].'.'.$ext[$p['type']];
 333
 334                 unset($rp, $ext);
 335
 336                 $doc = new DOMDocument('1.0', 'utf-8');
 337                 $doc->formatOutput = true;
 338
 339                 $root = self::add_header($doc, $owner, "dfrn:owner", "", false);
 340
 341                 $relocate = $doc->createElement("dfrn:relocate");
 342
 343                 xml_add_element($doc, $relocate, "dfrn:url", $owner['url']);
 344                 xml_add_element($doc, $relocate, "dfrn:name", $owner['name']);
 345                 xml_add_element($doc, $relocate, "dfrn:photo", $photos[4]);
 346                 xml_add_element($doc, $relocate, "dfrn:thumb", $photos[5]);
 347                 xml_add_element($doc, $relocate, "dfrn:micro", $photos[6]);
 348                 xml_add_element($doc, $relocate, "dfrn:request", $owner['request']);
 349                 xml_add_element($doc, $relocate, "dfrn:confirm", $owner['confirm']);
 350                 xml_add_element($doc, $relocate, "dfrn:notify", $owner['notify']);
 351                 xml_add_element($doc, $relocate, "dfrn:poll", $owner['poll']);
 352                 xml_add_element($doc, $relocate, "dfrn:sitepubkey", get_config('system','site_pubkey'));
 353
 354                 $root->appendChild($relocate);
 355
 356                 return(trim($doc->saveXML()));
 357         }
 358
 359         /**
 360          * @brief Adds the header elements for the DFRN protocol
 361          *
 362          * @param object $doc XML document
 363          * @param array $owner Owner record
 364          * @param string $authorelement Element name for the author
 365          * @param string $alternatelink link to profile or category
 366          * @param bool $public Is it a header for public posts?
 367          *
 368          * @return object XML root object
 369          */
 370         private function add_header($doc, $owner, $authorelement, $alternatelink = "", $public = false) {
 371
 372                 if ($alternatelink == "")
 373                         $alternatelink = $owner['url'];
 374
 375                 $root = $doc->createElementNS(NS_ATOM, 'feed');
 376                 $doc->appendChild($root);
 377
 378                 $root->setAttribute("xmlns:thr", NS_THR);
 379                 $root->setAttribute("xmlns:at", "http://purl.org/atompub/tombstones/1.0");
 380                 $root->setAttribute("xmlns:media", NS_MEDIA);
 381                 $root->setAttribute("xmlns:dfrn", "http://purl.org/macgirvin/dfrn/1.0");
 382                 $root->setAttribute("xmlns:activity", NS_ACTIVITY);
 383                 $root->setAttribute("xmlns:georss", NS_GEORSS);
 384                 $root->setAttribute("xmlns:poco", NS_POCO);
 385                 $root->setAttribute("xmlns:ostatus", NS_OSTATUS);
 386                 $root->setAttribute("xmlns:statusnet", NS_STATUSNET);
 387
 388                 //xml_add_element($doc, $root, "id", app::get_baseurl()."/profile/".$owner["nick"]);
 389                 xml_add_element($doc, $root, "id", app::get_baseurl()."/profile/".$owner["nick"]);
 390                 xml_add_element($doc, $root, "title", $owner["name"]);
 391
 392                 $attributes = array("uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION."-".DB_UPDATE_VERSION);
 393                 xml_add_element($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
 394
 395                 $attributes = array("rel" => "license", "href" => "http://creativecommons.org/licenses/by/3.0/");
 396                 xml_add_element($doc, $root, "link", "", $attributes);
 397
 398                 $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $alternatelink);
 399                 xml_add_element($doc, $root, "link", "", $attributes);
 400
 401                 ostatus_hublinks($doc, $root);
 402
 403                 if ($public) {
 404                         $attributes = array("rel" => "salmon", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 405                         xml_add_element($doc, $root, "link", "", $attributes);
 406
 407                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-replies", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 408                         xml_add_element($doc, $root, "link", "", $attributes);
 409
 410                         $attributes = array("rel" => "http://salmon-protocol.org/ns/salmon-mention", "href" => app::get_baseurl()."/salmon/".$owner["nick"]);
 411                         xml_add_element($doc, $root, "link", "", $attributes);
 412                 }
 413
 414                 if ($owner['page-flags'] == PAGE_COMMUNITY)
 415                         xml_add_element($doc, $root, "dfrn:community", 1);
 416
 417                 xml_add_element($doc, $root, "updated", datetime_convert("UTC", "UTC", "now", ATOM_TIME));
 418
 419                 $author = self::add_author($doc, $owner, $authorelement, $public);
 420                 $root->appendChild($author);
 421
 422                 return $root;
 423         }
 424
 425         /**
 426          * @brief Adds the author element in the header for the DFRN protocol
 427          *
 428          * @param object $doc XML document
 429          * @param array $owner Owner record
 430          * @param string $authorelement Element name for the author
 431          *
 432          * @return object XML author object
 433          */
 434         private function add_author($doc, $owner, $authorelement, $public) {
 435
 436                 $author = $doc->createElement($authorelement);
 437
 438                 $namdate = datetime_convert('UTC', 'UTC', $owner['name-date'].'+00:00' , ATOM_TIME);
 439                 $uridate = datetime_convert('UTC', 'UTC', $owner['uri-date'].'+00:00', ATOM_TIME);
 440                 $picdate = datetime_convert('UTC', 'UTC', $owner['avatar-date'].'+00:00', ATOM_TIME);
 441
 442                 $attributes = array("dfrn:updated" => $namdate);
 443                 xml_add_element($doc, $author, "name", $owner["name"], $attributes);
 444
 445                 $attributes = array("dfrn:updated" => $namdate);
 446                 xml_add_element($doc, $author, "uri", app::get_baseurl().'/profile/'.$owner["nickname"], $attributes);
 447
 448                 $attributes = array("rel" => "photo", "type" => "image/jpeg", "dfrn:updated" => $picdate,
 449                                         "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 450                 xml_add_element($doc, $author, "link", "", $attributes);
 451
 452                 $attributes = array("rel" => "avatar", "type" => "image/jpeg", "dfrn:updated" => $picdate,
 453                                         "media:width" => 175, "media:height" => 175, "href" => $owner['photo']);
 454                 xml_add_element($doc, $author, "link", "", $attributes);
 455
 456                 $birthday = feed_birthday($owner['user_uid'], $owner['timezone']);
 457
 458                 if ($birthday)
 459                         xml_add_element($doc, $author, "dfrn:birthday", $birthday);
 460
 461                 // The following fields will only be generated if this isn't for a public feed
 462                 if ($public)
 463                         return $author;
 464
 465                 // Only show contact details when we are allowed to
 466                 $r = q("SELECT `profile`.`about`, `profile`.`name`, `profile`.`homepage`, `user`.`nickname`, `user`.`timezone`,
 467                                 `profile`.`locality`, `profile`.`region`, `profile`.`country-name`, `profile`.`pub_keywords`, `profile`.`dob`
 468                         FROM `profile`
 469                                 INNER JOIN `user` ON `user`.`uid` = `profile`.`uid`
 470                                 WHERE `profile`.`is-default` AND NOT `user`.`hidewall` AND `user`.`uid` = %d",
 471                         intval($owner['user_uid']));
 472                 if ($r) {
 473                         $profile = $r[0];
 474                         xml_add_element($doc, $author, "poco:displayName", $profile["name"]);
 475                         xml_add_element($doc, $author, "poco:updated", $namdate);
 476
 477                         if (trim($profile["dob"]) != "0000-00-00")
 478                                 xml_add_element($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
 479
 480                         xml_add_element($doc, $author, "poco:note", $profile["about"]);
 481                         xml_add_element($doc, $author, "poco:preferredUsername", $profile["nickname"]);
 482
 483                         $savetz = date_default_timezone_get();
 484                         date_default_timezone_set($profile["timezone"]);
 485                         xml_add_element($doc, $author, "poco:utcOffset", date("P"));
 486                         date_default_timezone_set($savetz);
 487
 488                         if (trim($profile["homepage"]) != "") {
 489                                 $urls = $doc->createElement("poco:urls");
 490                                 xml_add_element($doc, $urls, "poco:type", "homepage");
 491                                 xml_add_element($doc, $urls, "poco:value", $profile["homepage"]);
 492                                 xml_add_element($doc, $urls, "poco:primary", "true");
 493                                 $author->appendChild($urls);
 494                         }
 495
 496                         if (trim($profile["pub_keywords"]) != "") {
 497                                 $keywords = explode(",", $profile["pub_keywords"]);
 498
 499                                 foreach ($keywords AS $keyword)
 500                                         xml_add_element($doc, $author, "poco:tags", trim($keyword));
 501
 502                         }
 503
 504                         /// @todo When we are having the XMPP address in the profile we should propagate it here
 505                         $xmpp = "";
 506                         if (trim($xmpp) != "") {
 507                                 $ims = $doc->createElement("poco:ims");
 508                                 xml_add_element($doc, $ims, "poco:type", "xmpp");
 509                                 xml_add_element($doc, $ims, "poco:value", $xmpp);
 510                                 xml_add_element($doc, $ims, "poco:primary", "true");
 511                                 $author->appendChild($ims);
 512                         }
 513
 514                         if (trim($profile["locality"].$profile["region"].$profile["country-name"]) != "") {
 515                                 $element = $doc->createElement("poco:address");
 516
 517                                 xml_add_element($doc, $element, "poco:formatted", formatted_location($profile));
 518
 519                                 if (trim($profile["locality"]) != "")
 520                                         xml_add_element($doc, $element, "poco:locality", $profile["locality"]);
 521
 522                                 if (trim($profile["region"]) != "")
 523                                         xml_add_element($doc, $element, "poco:region", $profile["region"]);
 524
 525                                 if (trim($profile["country-name"]) != "")
 526                                         xml_add_element($doc, $element, "poco:country", $profile["country-name"]);
 527
 528                                 $author->appendChild($element);
 529                         }
 530                 }
 531
 532                 return $author;
 533         }
 534
 535         /**
 536          * @brief Adds the author elements in the "entry" elements of the DFRN protocol
 537          *
 538          * @param object $doc XML document
 539          * @param string $element Element name for the author
 540          * @param string $contact_url Link of the contact
 541          * @param array $items Item elements
 542          *
 543          * @return object XML author object
 544          */
 545         private function add_entry_author($doc, $element, $contact_url, $item) {
 546
 547                 $contact = get_contact_details_by_url($contact_url, $item["uid"]);
 548
 549                 $author = $doc->createElement($element);
 550                 xml_add_element($doc, $author, "name", $contact["name"]);
 551                 xml_add_element($doc, $author, "uri", $contact["url"]);
 552
 553                 /// @Todo
 554                 /// - Check real image type and image size
 555                 /// - Check which of these boths elements we should use
 556                 $attributes = array(
 557                                 "rel" => "photo",
 558                                 "type" => "image/jpeg",
 559                                 "media:width" => 80,
 560                                 "media:height" => 80,
 561                                 "href" => $contact["photo"]);
 562                 xml_add_element($doc, $author, "link", "", $attributes);
 563
 564                 $attributes = array(
 565                                 "rel" => "avatar",
 566                                 "type" => "image/jpeg",
 567                                 "media:width" => 80,
 568                                 "media:height" => 80,
 569                                 "href" => $contact["photo"]);
 570                 xml_add_element($doc, $author, "link", "", $attributes);
 571
 572                 return $author;
 573         }
 574
 575         /**
 576          * @brief Adds the activity elements
 577          *
 578          * @param object $doc XML document
 579          * @param string $element Element name for the activity
 580          * @param string $activity activity value
 581          *
 582          * @return object XML activity object
 583          */
 584         private function create_activity($doc, $element, $activity) {
 585
 586                 if($activity) {
 587                         $entry = $doc->createElement($element);
 588
 589                         $r = parse_xml_string($activity, false);
 590                         if(!$r)
 591                                 return false;
 592                         if($r->type)
 593                                 xml_add_element($doc, $entry, "activity:object-type", $r->type);
 594                         if($r->id)
 595                                 xml_add_element($doc, $entry, "id", $r->id);
 596                         if($r->title)
 597                                 xml_add_element($doc, $entry, "title", $r->title);
 598                         if($r->link) {
 599                                 if(substr($r->link,0,1) === '<') {
 600                                         if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
 601                                                 $r->link = str_replace('&','&amp;', $r->link);
 602
 603                                         $r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
 604
 605                                         $data = parse_xml_string($r->link, false);
 606                                         foreach ($data->attributes() AS $parameter => $value)
 607                                                 $attributes[$parameter] = $value;
 608                                 } else
 609                                         $attributes = array("rel" => "alternate", "type" => "text/html", "href" => $r->link);
 610
 611                                 xml_add_element($doc, $entry, "link", "", $attributes);
 612                         }
 613                         if($r->content)
 614                                 xml_add_element($doc, $entry, "content", bbcode($r->content), array("type" => "html"));
 615
 616                         return $entry;
 617                 }
 618
 619                 return false;
 620         }
 621
 622         /**
 623          * @brief Adds the elements for attachments
 624          *
 625          * @param object $doc XML document
 626          * @param object $root XML root
 627          * @param array $item Item element
 628          *
 629          * @return object XML attachment object
 630          */
 631         private function get_attachment($doc, $root, $item) {
 632                 $arr = explode('[/attach],',$item['attach']);
 633                 if(count($arr)) {
 634                         foreach($arr as $r) {
 635                                 $matches = false;
 636                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|',$r,$matches);
 637                                 if($cnt) {
 638                                         $attributes = array("rel" => "enclosure",
 639                                                         "href" => $matches[1],
 640                                                         "type" => $matches[3]);
 641
 642                                         if(intval($matches[2]))
 643                                                 $attributes["length"] = intval($matches[2]);
 644
 645                                         if(trim($matches[4]) != "")
 646                                                 $attributes["title"] = trim($matches[4]);
 647
 648                                         xml_add_element($doc, $root, "link", "", $attributes);
 649                                 }
 650                         }
 651                 }
 652         }
 653
 654         /**
 655          * @brief Adds the "entry" elements for the DFRN protocol
 656          *
 657          * @param object $doc XML document
 658          * @param string $type "text" or "html"
 659          * @param array $item Item element
 660          * @param array $owner Owner record
 661          * @param bool $comment Trigger the sending of the "comment" element
 662          * @param int $cid Contact ID of the recipient
 663          *
 664          * @return object XML entry object
 665          */
 666         private function entry($doc, $type, $item, $owner, $comment = false, $cid = 0) {
 667
 668                 $mentioned = array();
 669
 670                 if(!$item['parent'])
 671                         return;
 672
 673                 if($item['deleted']) {
 674                         $attributes = array("ref" => $item['uri'], "when" => datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME));
 675                         return xml_create_element($doc, "at:deleted-entry", "", $attributes);
 676                 }
 677
 678                 $entry = $doc->createElement("entry");
 679
 680                 if($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid'])
 681                         $body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
 682                 else
 683                         $body = $item['body'];
 684
 685                 if ($type == 'html') {
 686                         $htmlbody = $body;
 687
 688                         if ($item['title'] != "")
 689                                 $htmlbody = "[b]".$item['title']."[/b]\n\n".$htmlbody;
 690
 691                         $htmlbody = bbcode($htmlbody, false, false, 7);
 692                 }
 693
 694                 $author = self::add_entry_author($doc, "author", $item["author-link"], $item);
 695                 $entry->appendChild($author);
 696
 697                 $dfrnowner = self::add_entry_author($doc, "dfrn:owner", $item["owner-link"], $item);
 698                 $entry->appendChild($dfrnowner);
 699
 700                 if(($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
 701                         $parent = q("SELECT `guid` FROM `item` WHERE `id` = %d", intval($item["parent"]));
 702                         $parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 703                         $attributes = array("ref" => $parent_item, "type" => "text/html", "href" => app::get_baseurl().'/display/'.$parent[0]['guid']);
 704                         xml_add_element($doc, $entry, "thr:in-reply-to", "", $attributes);
 705                 }
 706
 707                 xml_add_element($doc, $entry, "id", $item["uri"]);
 708                 xml_add_element($doc, $entry, "title", $item["title"]);
 709
 710                 xml_add_element($doc, $entry, "published", datetime_convert("UTC","UTC",$item["created"]."+00:00",ATOM_TIME));
 711                 xml_add_element($doc, $entry, "updated", datetime_convert("UTC","UTC",$item["edited"]."+00:00",ATOM_TIME));
 712
 713                 xml_add_element($doc, $entry, "dfrn:env", base64url_encode($body, true));
 714                 xml_add_element($doc, $entry, "content", (($type === 'html') ? $htmlbody : $body), array("type" => $type));
 715
 716                 xml_add_element($doc, $entry, "link", "", array("rel" => "alternate", "type" => "text/html",
 717                                                                 "href" => app::get_baseurl()."/display/".$item["guid"]));
 718
 719                 // "comment-allow" is some old fashioned stuff for old Friendica versions.
 720                 // It is included in the rewritten code for completeness
 721                 if ($comment)
 722                         xml_add_element($doc, $entry, "dfrn:comment-allow", intval($item['last-child']));
 723
 724                 if($item['location'])
 725                         xml_add_element($doc, $entry, "dfrn:location", $item['location']);
 726
 727                 if($item['coord'])
 728                         xml_add_element($doc, $entry, "georss:point", $item['coord']);
 729
 730                 if(($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid']))
 731                         xml_add_element($doc, $entry, "dfrn:private", (($item['private']) ? $item['private'] : 1));
 732
 733                 if($item['extid'])
 734                         xml_add_element($doc, $entry, "dfrn:extid", $item['extid']);
 735
 736                 if($item['bookmark'])
 737                         xml_add_element($doc, $entry, "dfrn:bookmark", "true");
 738
 739                 if($item['app'])
 740                         xml_add_element($doc, $entry, "statusnet:notice_info", "", array("local_id" => $item['id'], "source" => $item['app']));
 741
 742                 xml_add_element($doc, $entry, "dfrn:diaspora_guid", $item["guid"]);
 743
 744                 // The signed text contains the content in Markdown, the sender handle and the signatur for the content
 745                 // It is needed for relayed comments to Diaspora.
 746                 if($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                 $actobj = self::create_activity($doc, "activity:object", $item['object']);
 754                 if ($actobj)
 755                         $entry->appendChild($actobj);
 756
 757                 $actarg = self::create_activity($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" => $mention));
 786                 }
 787
 788                 self::get_attachment($doc, $entry, $item);
 789
 790                 return $entry;
 791         }
 792
 793         /**
 794          * @brief Delivers the atom content to the contacts
 795          *
 796          * @param array $owner Owner record
 797          * @param array $contactr Contact record of the receiver
 798          * @param string $atom Content that will be transmitted
 799          * @param bool $dissolve (to be documented)
 800          *
 801          * @return int Deliver status. -1 means an error.
 802          */
 803         function deliver($owner,$contact,$atom, $dissolve = false) {
 804
 805                 $a = get_app();
 806
 807                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
 808
 809                 if($contact['duplex'] && $contact['dfrn-id'])
 810                         $idtosend = '0:' . $orig_id;
 811                 if($contact['duplex'] && $contact['issued-id'])
 812                         $idtosend = '1:' . $orig_id;
 813
 814
 815                 $rino = get_config('system','rino_encrypt');
 816                 $rino = intval($rino);
 817                 // use RINO1 if mcrypt isn't installed and RINO2 was selected
 818                 if ($rino==2 and !function_exists('mcrypt_create_iv')) $rino=1;
 819
 820                 logger("Local rino version: ". $rino, LOGGER_DEBUG);
 821
 822                 $ssl_val = intval(get_config('system','ssl_policy'));
 823                 $ssl_policy = '';
 824
 825                 switch($ssl_val){
 826                         case SSL_POLICY_FULL:
 827                                 $ssl_policy = 'full';
 828                                 break;
 829                         case SSL_POLICY_SELFSIGN:
 830                                 $ssl_policy = 'self';
 831                                 break;
 832                         case SSL_POLICY_NONE:
 833                         default:
 834                                 $ssl_policy = 'none';
 835                                 break;
 836                 }
 837
 838                 $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
 839
 840                 logger('dfrn_deliver: ' . $url);
 841
 842                 $xml = fetch_url($url);
 843
 844                 $curl_stat = $a->get_curl_code();
 845                 if(! $curl_stat)
 846                         return(-1); // timed out
 847
 848                 logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
 849
 850                 if(! $xml)
 851                         return 3;
 852
 853                 if(strpos($xml,'<?xml') === false) {
 854                         logger('dfrn_deliver: no valid XML returned');
 855                         logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
 856                         return 3;
 857                 }
 858
 859                 $res = parse_xml_string($xml);
 860
 861                 if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 862                         return (($res->status) ? $res->status : 3);
 863
 864                 $postvars     = array();
 865                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
 866                 $challenge    = hex2bin((string) $res->challenge);
 867                 $perm         = (($res->perm) ? $res->perm : null);
 868                 $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
 869                 $rino_remote_version = intval($res->rino);
 870                 $page         = (($owner['page-flags'] == PAGE_COMMUNITY) ? 1 : 0);
 871
 872                 logger("Remote rino version: ".$rino_remote_version." for ".$contact["url"], LOGGER_DEBUG);
 873
 874                 if($owner['page-flags'] == PAGE_PRVGROUP)
 875                         $page = 2;
 876
 877                 $final_dfrn_id = '';
 878
 879                 if($perm) {
 880                         if((($perm == 'rw') && (! intval($contact['writable'])))
 881                                 || (($perm == 'r') && (intval($contact['writable'])))) {
 882                                 q("update contact set writable = %d where id = %d",
 883                                         intval(($perm == 'rw') ? 1 : 0),
 884                                         intval($contact['id'])
 885                                 );
 886                                 $contact['writable'] = (string) 1 - intval($contact['writable']);
 887                         }
 888                 }
 889
 890                 if(($contact['duplex'] && strlen($contact['pubkey']))
 891                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
 892                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
 893                         openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 894                         openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 895                 } else {
 896                         openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 897                         openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 898                 }
 899
 900                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 901
 902                 if(strpos($final_dfrn_id,':') == 1)
 903                         $final_dfrn_id = substr($final_dfrn_id,2);
 904
 905                 if($final_dfrn_id != $orig_id) {
 906                         logger('dfrn_deliver: wrong dfrn_id.');
 907                         // did not decode properly - cannot trust this site
 908                         return 3;
 909                 }
 910
 911                 $postvars['dfrn_id']      = $idtosend;
 912                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 913                 if($dissolve)
 914                         $postvars['dissolve'] = '1';
 915
 916
 917                 if((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
 918                         $postvars['data'] = $atom;
 919                         $postvars['perm'] = 'rw';
 920                 } else {
 921                         $postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
 922                         $postvars['perm'] = 'r';
 923                 }
 924
 925                 $postvars['ssl_policy'] = $ssl_policy;
 926
 927                 if($page)
 928                         $postvars['page'] = $page;
 929
 930
 931                 if($rino>0 && $rino_remote_version>0 && (! $dissolve)) {
 932                         logger('rino version: '. $rino_remote_version);
 933
 934                         switch($rino_remote_version) {
 935                                 case 1:
 936                                         // Deprecated rino version!
 937                                         $key = substr(random_string(),0,16);
 938                                         $data = aes_encrypt($postvars['data'],$key);
 939                                         break;
 940                                 case 2:
 941                                         // RINO 2 based on php-encryption
 942                                         try {
 943                                                 $key = Crypto::createNewRandomKey();
 944                                         } catch (CryptoTestFailed $ex) {
 945                                                 logger('Cannot safely create a key');
 946                                                 return -1;
 947                                         } catch (CannotPerformOperation $ex) {
 948                                                 logger('Cannot safely create a key');
 949                                                 return -1;
 950                                         }
 951                                         try {
 952                                                 $data = Crypto::encrypt($postvars['data'], $key);
 953                                         } catch (CryptoTestFailed $ex) {
 954                                                 logger('Cannot safely perform encryption');
 955                                                 return -1;
 956                                         } catch (CannotPerformOperation $ex) {
 957                                                 logger('Cannot safely perform encryption');
 958                                                 return -1;
 959                                         }
 960                                         break;
 961                                 default:
 962                                         logger("rino: invalid requested verision '$rino_remote_version'");
 963                                         return -1;
 964                         }
 965
 966                         $postvars['rino'] = $rino_remote_version;
 967                         $postvars['data'] = bin2hex($data);
 968
 969                         #logger('rino: sent key = ' . $key, LOGGER_DEBUG);
 970
 971
 972                         if($dfrn_version >= 2.1) {
 973                                 if(($contact['duplex'] && strlen($contact['pubkey']))
 974                                         || ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
 975                                         || ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey'])))
 976
 977                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
 978                                 else
 979                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
 980
 981                         } else {
 982                                 if(($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY))
 983                                         openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
 984                                 else
 985                                         openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
 986
 987                         }
 988
 989                         logger('md5 rawkey ' . md5($postvars['key']));
 990
 991                         $postvars['key'] = bin2hex($postvars['key']);
 992                 }
 993
 994
 995                 logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars,true), LOGGER_DATA);
 996
 997                 $xml = post_url($contact['notify'],$postvars);
 998
 999                 logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
1000
1001                 $curl_stat = $a->get_curl_code();
1002                 if((! $curl_stat) || (! strlen($xml)))
1003                         return(-1); // timed out
1004
1005                 if(($curl_stat == 503) && (stristr($a->get_curl_headers(),'retry-after')))
1006                         return(-1);
1007
1008                 if(strpos($xml,'<?xml') === false) {
1009                         logger('dfrn_deliver: phase 2: no valid XML returned');
1010                         logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
1011                         return 3;
1012                 }
1013
1014                 if($contact['term-date'] != '0000-00-00 00:00:00') {
1015                         logger("dfrn_deliver: $url back from the dead - removing mark for death");
1016                         require_once('include/Contact.php');
1017                         unmark_for_death($contact);
1018                 }
1019
1020                 $res = parse_xml_string($xml);
1021
1022                 return $res->status;
1023         }
1024 }