include/diaspora.php

   1 <?php
   2
   3 /**
   4  * @file include/diaspora.php
   5  *
   6  * @todo GET /people/9aed8882b9f64896/stream
   7  */
   8
   9 require_once('include/crypto.php');
  10 require_once('include/items.php');
  11 require_once('include/bb2diaspora.php');
  12 require_once('include/contact_selectors.php');
  13 require_once('include/queue_fn.php');
  14 require_once('include/lock.php');
  15 require_once('include/threads.php');
  16 require_once('mod/share.php');
  17
  18 function diaspora_dispatch_public($msg) {
  19
  20         $enabled = intval(get_config('system','diaspora_enabled'));
  21         if(! $enabled) {
  22                 logger('mod-diaspora: disabled');
  23                 return;
  24         }
  25
  26         // Use a dummy importer to import the data for the public copy
  27         $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
  28         $result = diaspora_dispatch($importer,$msg);
  29         logger("Dispatcher reported ".$result, LOGGER_DEBUG);
  30
  31         // Now distribute it to the followers
  32         $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
  33                 ( SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s' )
  34                 AND `account_expired` = 0 AND `account_removed` = 0 ",
  35                 dbesc(NETWORK_DIASPORA),
  36                 dbesc($msg['author'])
  37         );
  38         if(count($r)) {
  39                 foreach($r as $rr) {
  40                         logger('diaspora_public: delivering to: ' . $rr['username']);
  41                         diaspora_dispatch($rr,$msg);
  42                 }
  43         }
  44         else
  45                 logger('diaspora_public: no subscribers for '.$msg["author"].' '.print_r($msg, true));
  46 }
  47
  48
  49
  50 function diaspora_dispatch($importer,$msg,$attempt=1) {
  51
  52         $ret = 0;
  53
  54         $enabled = intval(get_config('system','diaspora_enabled'));
  55         if(! $enabled) {
  56                 logger('mod-diaspora: disabled');
  57                 return;
  58         }
  59
  60         // php doesn't like dashes in variable names
  61
  62         $msg['message'] = str_replace(
  63                         array('<activity_streams-photo>','</activity_streams-photo>'),
  64                         array('<asphoto>','</asphoto>'),
  65                         $msg['message']);
  66
  67
  68         $parsed_xml = parse_xml_string($msg['message'],false);
  69
  70         $xmlbase = $parsed_xml->post;
  71
  72         logger('diaspora_dispatch: ' . print_r($xmlbase,true), LOGGER_DEBUG);
  73
  74
  75         if($xmlbase->request) {
  76                 $ret = diaspora_request($importer,$xmlbase->request);
  77         }
  78         elseif($xmlbase->status_message) {
  79                 $ret = diaspora_post($importer,$xmlbase->status_message,$msg);
  80         }
  81         elseif($xmlbase->profile) {
  82                 $ret = diaspora_profile($importer,$xmlbase->profile,$msg);
  83         }
  84         elseif($xmlbase->comment) {
  85                 $ret = diaspora_comment($importer,$xmlbase->comment,$msg);
  86         }
  87         elseif($xmlbase->like) {
  88                 $ret = diaspora_like($importer,$xmlbase->like,$msg);
  89         }
  90         elseif($xmlbase->asphoto) {
  91                 $ret = diaspora_asphoto($importer,$xmlbase->asphoto,$msg);
  92         }
  93         elseif($xmlbase->reshare) {
  94                 $ret = diaspora_reshare($importer,$xmlbase->reshare,$msg);
  95         }
  96         elseif($xmlbase->retraction) {
  97                 $ret = diaspora_retraction($importer,$xmlbase->retraction,$msg);
  98         }
  99         elseif($xmlbase->signed_retraction) {
 100                 $ret = diaspora_signed_retraction($importer,$xmlbase->signed_retraction,$msg);
 101         }
 102         elseif($xmlbase->relayable_retraction) {
 103                 $ret = diaspora_signed_retraction($importer,$xmlbase->relayable_retraction,$msg);
 104         }
 105         elseif($xmlbase->photo) {
 106                 $ret = diaspora_photo($importer,$xmlbase->photo,$msg,$attempt);
 107         }
 108         elseif($xmlbase->conversation) {
 109                 $ret = diaspora_conversation($importer,$xmlbase->conversation,$msg);
 110         }
 111         elseif($xmlbase->message) {
 112                 $ret = diaspora_message($importer,$xmlbase->message,$msg);
 113         }
 114         elseif($xmlbase->participation) {
 115                 $ret = diaspora_participation($importer,$xmlbase->participation);
 116         }
 117         else {
 118                 logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true));
 119         }
 120         return $ret;
 121 }
 122
 123 function diaspora_handle_from_contact($contact_id) {
 124         $handle = False;
 125
 126         logger("diaspora_handle_from_contact: contact id is " . $contact_id, LOGGER_DEBUG);
 127
 128         $r = q("SELECT network, addr, self, url, nick FROM contact WHERE id = %d",
 129                intval($contact_id)
 130         );
 131         if($r) {
 132                 $contact = $r[0];
 133
 134                 logger("diaspora_handle_from_contact: contact 'self' = " . $contact['self'] . " 'url' = " . $contact['url'], LOGGER_DEBUG);
 135
 136                 if($contact['network'] === NETWORK_DIASPORA) {
 137                         $handle = $contact['addr'];
 138
 139 //                      logger("diaspora_handle_from_contact: contact id is a Diaspora person, handle = " . $handle, LOGGER_DEBUG);
 140                 }
 141                 elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
 142                         $baseurl_start = strpos($contact['url'],'://') + 3;
 143                         $baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
 144                         $baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
 145                         $handle = $contact['nick'] . '@' . $baseurl;
 146
 147 //                      logger("diaspora_handle_from_contact: contact id is a DFRN person, handle = " . $handle, LOGGER_DEBUG);
 148                 }
 149         }
 150
 151         return $handle;
 152 }
 153
 154 function diaspora_get_contact_by_handle($uid,$handle) {
 155         $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `addr` = '%s' LIMIT 1",
 156                 dbesc(NETWORK_DIASPORA),
 157                 intval($uid),
 158                 dbesc($handle)
 159         );
 160         if($r && count($r))
 161                 return $r[0];
 162
 163         $handle_parts = explode("@", $handle);
 164         $nurl_sql = '%%://' . $handle_parts[1] . '%%/profile/' . $handle_parts[0];
 165         $r = q("SELECT * FROM contact WHERE network = '%s' AND uid = %d AND nurl LIKE '%s' LIMIT 1",
 166                dbesc(NETWORK_DFRN),
 167                intval($uid),
 168                dbesc($nurl_sql)
 169         );
 170         if($r && count($r))
 171                 return $r[0];
 172
 173         return false;
 174 }
 175
 176 function find_diaspora_person_by_handle($handle) {
 177
 178         $person = false;
 179         $update = false;
 180         $got_lock = false;
 181
 182         $endlessloop = 0;
 183         $maxloops = 10;
 184
 185         do {
 186                 $r = q("select * from fcontact where network = '%s' and addr = '%s' limit 1",
 187                         dbesc(NETWORK_DIASPORA),
 188                         dbesc($handle)
 189                 );
 190                 if(count($r)) {
 191                         $person = $r[0];
 192                         logger('find_diaspora_person_by handle: in cache ' . print_r($r,true), LOGGER_DEBUG);
 193
 194                         // update record occasionally so it doesn't get stale
 195                         $d = strtotime($person['updated'] . ' +00:00');
 196                         if($d < strtotime('now - 14 days'))
 197                                 $update = true;
 198                 }
 199
 200
 201                 // FETCHING PERSON INFORMATION FROM REMOTE SERVER
 202                 //
 203                 // If the person isn't in our 'fcontact' table, or if he/she is but
 204                 // his/her information hasn't been updated for more than 14 days, then
 205                 // we want to fetch the person's information from the remote server.
 206                 //
 207                 // Note that $person isn't changed by this block of code unless the
 208                 // person's information has been successfully fetched from the remote
 209                 // server. So if $person was 'false' to begin with (because he/she wasn't
 210                 // in the local cache), it'll stay false, and if $person held the local
 211                 // cache information to begin with, it'll keep that information. That way
 212                 // if there's a problem with the remote fetch, we can at least use our
 213                 // cached information--it's better than nothing.
 214
 215                 if((! $person) || ($update))  {
 216                         // Lock the function to prevent race conditions if multiple items
 217                         // come in at the same time from a person who doesn't exist in
 218                         // fcontact
 219                         //
 220                         // Don't loop forever. On the last loop, try to create the contact
 221                         // whether the function is locked or not. Maybe the locking thread
 222                         // has died or something. At any rate, a duplicate in 'fcontact'
 223                         // is a much smaller problem than a deadlocked thread
 224                         $got_lock = lock_function('find_diaspora_person_by_handle', false);
 225                         if(($endlessloop + 1) >= $maxloops)
 226                                 $got_lock = true;
 227
 228                         if($got_lock) {
 229                                 logger('find_diaspora_person_by_handle: create or refresh', LOGGER_DEBUG);
 230                                 require_once('include/Scrape.php');
 231                                 $r = probe_url($handle, PROBE_DIASPORA);
 232
 233                                 // Note that Friendica contacts can return a "Diaspora person"
 234                                 // if Diaspora connectivity is enabled on their server
 235                                 if((count($r)) && ($r['network'] === NETWORK_DIASPORA)) {
 236                                         add_fcontact($r,$update);
 237                                         $person = ($r);
 238                                 }
 239
 240                                 unlock_function('find_diaspora_person_by_handle');
 241                         }
 242                         else {
 243                                 logger('find_diaspora_person_by_handle: couldn\'t lock function', LOGGER_DEBUG);
 244                                 if(! $person)
 245                                         block_on_function_lock('find_diaspora_person_by_handle');
 246                         }
 247                 }
 248         } while((! $person) && (! $got_lock) && (++$endlessloop < $maxloops));
 249         // We need to try again if the person wasn't in 'fcontact' but the function was locked.
 250         // The fact that the function was locked may mean that another process was creating the
 251         // person's record. It could also mean another process was creating or updating an unrelated
 252         // person.
 253         //
 254         // At any rate, we need to keep trying until we've either got the person or had a chance to
 255         // try to fetch his/her remote information. But we don't want to block on locking the
 256         // function, because if the other process is creating the record, then when we acquire the lock
 257         // we'll dive right into creating another, duplicate record. We DO want to at least wait
 258         // until the lock is released, so we don't flood the database with requests.
 259         //
 260         // If the person was in the 'fcontact' table, don't try again. It's not worth the time, since
 261         // we do have some information for the person
 262
 263         return $person;
 264 }
 265
 266
 267 function get_diaspora_key($uri) {
 268         logger('Fetching diaspora key for: ' . $uri);
 269
 270         $r = find_diaspora_person_by_handle($uri);
 271         if($r)
 272                 return $r['pubkey'];
 273         return '';
 274 }
 275
 276
 277 function diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey) {
 278         $a = get_app();
 279
 280         logger('diaspora_pubmsg_build: ' . $msg, LOGGER_DATA);
 281
 282
 283         $handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
 284
 285 //      $b64_data = base64_encode($msg);
 286 //      $b64url_data = base64url_encode($b64_data);
 287
 288         $b64url_data = base64url_encode($msg);
 289
 290         $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
 291
 292         $type = 'application/xml';
 293         $encoding = 'base64url';
 294         $alg = 'RSA-SHA256';
 295
 296         $signable_data = $data  . '.' . base64url_encode($type) . '.'
 297                 . base64url_encode($encoding) . '.' . base64url_encode($alg) ;
 298
 299         $signature = rsa_sign($signable_data,$prvkey);
 300         $sig = base64url_encode($signature);
 301
 302 $magic_env = <<< EOT
 303 <?xml version='1.0' encoding='UTF-8'?>
 304 <diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
 305   <header>
 306     <author_id>$handle</author_id>
 307   </header>
 308   <me:env>
 309     <me:encoding>base64url</me:encoding>
 310     <me:alg>RSA-SHA256</me:alg>
 311     <me:data type="application/xml">$data</me:data>
 312     <me:sig>$sig</me:sig>
 313   </me:env>
 314 </diaspora>
 315 EOT;
 316
 317         logger('diaspora_pubmsg_build: magic_env: ' . $magic_env, LOGGER_DATA);
 318         return $magic_env;
 319
 320 }
 321
 322
 323
 324
 325 function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey,$public = false) {
 326         $a = get_app();
 327
 328         if($public)
 329                 return diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey);
 330
 331         logger('diaspora_msg_build: ' . $msg, LOGGER_DATA);
 332
 333         // without a public key nothing will work
 334
 335         if(! $pubkey) {
 336                 logger('diaspora_msg_build: pubkey missing: contact id: ' . $contact['id']);
 337                 return '';
 338         }
 339
 340         $inner_aes_key = random_string(32);
 341         $b_inner_aes_key = base64_encode($inner_aes_key);
 342         $inner_iv = random_string(16);
 343         $b_inner_iv = base64_encode($inner_iv);
 344
 345         $outer_aes_key = random_string(32);
 346         $b_outer_aes_key = base64_encode($outer_aes_key);
 347         $outer_iv = random_string(16);
 348         $b_outer_iv = base64_encode($outer_iv);
 349
 350         $handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
 351
 352         $padded_data = pkcs5_pad($msg,16);
 353         $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
 354
 355         $b64_data = base64_encode($inner_encrypted);
 356
 357
 358         $b64url_data = base64url_encode($b64_data);
 359         $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
 360
 361         $type = 'application/xml';
 362         $encoding = 'base64url';
 363         $alg = 'RSA-SHA256';
 364
 365         $signable_data = $data  . '.' . base64url_encode($type) . '.'
 366                 . base64url_encode($encoding) . '.' . base64url_encode($alg) ;
 367
 368         $signature = rsa_sign($signable_data,$prvkey);
 369         $sig = base64url_encode($signature);
 370
 371 $decrypted_header = <<< EOT
 372 <decrypted_header>
 373   <iv>$b_inner_iv</iv>
 374   <aes_key>$b_inner_aes_key</aes_key>
 375   <author_id>$handle</author_id>
 376 </decrypted_header>
 377 EOT;
 378
 379         $decrypted_header = pkcs5_pad($decrypted_header,16);
 380
 381         $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
 382
 383         $outer_json = json_encode(array('iv' => $b_outer_iv,'key' => $b_outer_aes_key));
 384
 385         $encrypted_outer_key_bundle = '';
 386         openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey);
 387
 388         $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
 389
 390         logger('outer_bundle: ' . $b64_encrypted_outer_key_bundle . ' key: ' . $pubkey, LOGGER_DATA);
 391
 392         $encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle),
 393                 'ciphertext' => base64_encode($ciphertext)));
 394         $cipher_json = base64_encode($encrypted_header_json_object);
 395
 396         $encrypted_header = '<encrypted_header>' . $cipher_json . '</encrypted_header>';
 397
 398 $magic_env = <<< EOT
 399 <?xml version='1.0' encoding='UTF-8'?>
 400 <diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
 401   $encrypted_header
 402   <me:env>
 403     <me:encoding>base64url</me:encoding>
 404     <me:alg>RSA-SHA256</me:alg>
 405     <me:data type="application/xml">$data</me:data>
 406     <me:sig>$sig</me:sig>
 407   </me:env>
 408 </diaspora>
 409 EOT;
 410
 411         logger('diaspora_msg_build: magic_env: ' . $magic_env, LOGGER_DATA);
 412         return $magic_env;
 413
 414 }
 415
 416 /**
 417  *
 418  * diaspora_decode($importer,$xml)
 419  *   array $importer -> from user table
 420  *   string $xml -> urldecoded Diaspora salmon
 421  *
 422  * Returns array
 423  * 'message' -> decoded Diaspora XML message
 424  * 'author' -> author diaspora handle
 425  * 'key' -> author public key (converted to pkcs#8)
 426  *
 427  * Author and key are used elsewhere to save a lookup for verifying replies and likes
 428  */
 429
 430
 431 function diaspora_decode($importer,$xml) {
 432
 433         $public = false;
 434         $basedom = parse_xml_string($xml);
 435
 436         $children = $basedom->children('https://joindiaspora.com/protocol');
 437
 438         if($children->header) {
 439                 $public = true;
 440                 $author_link = str_replace('acct:','',$children->header->author_id);
 441         }
 442         else {
 443
 444                 $encrypted_header = json_decode(base64_decode($children->encrypted_header));
 445
 446                 $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
 447                 $ciphertext = base64_decode($encrypted_header->ciphertext);
 448
 449                 $outer_key_bundle = '';
 450                 openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
 451
 452                 $j_outer_key_bundle = json_decode($outer_key_bundle);
 453
 454                 $outer_iv = base64_decode($j_outer_key_bundle->iv);
 455                 $outer_key = base64_decode($j_outer_key_bundle->key);
 456
 457                 $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
 458
 459
 460                 $decrypted = pkcs5_unpad($decrypted);
 461
 462                 /**
 463                  * $decrypted now contains something like
 464                  *
 465                  *  <decrypted_header>
 466                  *     <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
 467                  *     <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
 468
 469 ***** OBSOLETE
 470
 471                  *     <author>
 472                  *       <name>Ryan Hughes</name>
 473                  *       <uri>acct:galaxor@diaspora.pirateship.org</uri>
 474                  *     </author>
 475
 476 ***** CURRENT
 477
 478                  *     <author_id>galaxor@diaspora.priateship.org</author_id>
 479
 480 ***** END DIFFS
 481
 482                  *  </decrypted_header>
 483                  */
 484
 485                 logger('decrypted: ' . $decrypted, LOGGER_DEBUG);
 486                 $idom = parse_xml_string($decrypted,false);
 487
 488                 $inner_iv = base64_decode($idom->iv);
 489                 $inner_aes_key = base64_decode($idom->aes_key);
 490
 491                 $author_link = str_replace('acct:','',$idom->author_id);
 492
 493         }
 494
 495         $dom = $basedom->children(NAMESPACE_SALMON_ME);
 496
 497         // figure out where in the DOM tree our data is hiding
 498
 499         if($dom->provenance->data)
 500                 $base = $dom->provenance;
 501         elseif($dom->env->data)
 502                 $base = $dom->env;
 503         elseif($dom->data)
 504                 $base = $dom;
 505
 506         if(! $base) {
 507                 logger('mod-diaspora: unable to locate salmon data in xml ');
 508                 http_status_exit(400);
 509         }
 510
 511
 512         // Stash the signature away for now. We have to find their key or it won't be good for anything.
 513         $signature = base64url_decode($base->sig);
 514
 515         // unpack the  data
 516
 517         // strip whitespace so our data element will return to one big base64 blob
 518         $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
 519
 520
 521         // stash away some other stuff for later
 522
 523         $type = $base->data[0]->attributes()->type[0];
 524         $keyhash = $base->sig[0]->attributes()->keyhash[0];
 525         $encoding = $base->encoding;
 526         $alg = $base->alg;
 527
 528
 529         $signed_data = $data  . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
 530
 531
 532         // decode the data
 533         $data = base64url_decode($data);
 534
 535
 536         if($public) {
 537                 $inner_decrypted = $data;
 538         }
 539         else {
 540
 541                 // Decode the encrypted blob
 542
 543                 $inner_encrypted = base64_decode($data);
 544                 $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
 545                 $inner_decrypted = pkcs5_unpad($inner_decrypted);
 546         }
 547
 548         if(! $author_link) {
 549                 logger('mod-diaspora: Could not retrieve author URI.');
 550                 http_status_exit(400);
 551         }
 552
 553         // Once we have the author URI, go to the web and try to find their public key
 554         // (first this will look it up locally if it is in the fcontact cache)
 555         // This will also convert diaspora public key from pkcs#1 to pkcs#8
 556
 557         logger('mod-diaspora: Fetching key for ' . $author_link );
 558         $key = get_diaspora_key($author_link);
 559
 560         if(! $key) {
 561                 logger('mod-diaspora: Could not retrieve author key.');
 562                 http_status_exit(400);
 563         }
 564
 565         $verify = rsa_verify($signed_data,$signature,$key);
 566
 567         if(! $verify) {
 568                 logger('mod-diaspora: Message did not verify. Discarding.');
 569                 http_status_exit(400);
 570         }
 571
 572         logger('mod-diaspora: Message verified.');
 573
 574         return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
 575
 576 }
 577
 578
 579 function diaspora_request($importer,$xml) {
 580
 581         $a = get_app();
 582
 583         $sender_handle = unxmlify($xml->sender_handle);
 584         $recipient_handle = unxmlify($xml->recipient_handle);
 585
 586         if(! $sender_handle || ! $recipient_handle)
 587                 return;
 588
 589         $contact = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
 590
 591         if($contact) {
 592
 593                 // perhaps we were already sharing with this person. Now they're sharing with us.
 594                 // That makes us friends.
 595
 596                 if($contact['rel'] == CONTACT_IS_FOLLOWER && in_array($importer['page-flags'], array(PAGE_FREELOVE))) {
 597                         q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
 598                                 intval(CONTACT_IS_FRIEND),
 599                                 intval($contact['id']),
 600                                 intval($importer['uid'])
 601                         );
 602                 }
 603                 // send notification
 604
 605                 $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 606                         intval($importer['uid'])
 607                 );
 608
 609                 if((count($r)) && (!$r[0]['hide-friends']) && (!$contact['hidden']) && intval(get_pconfig($importer['uid'],'system','post_newfriend'))) {
 610                         require_once('include/items.php');
 611
 612                         $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 613                                 intval($importer['uid'])
 614                         );
 615
 616                         // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
 617
 618                         if(count($self) && $contact['rel'] == CONTACT_IS_FOLLOWER) {
 619
 620                                 $arr = array();
 621                                 $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $importer['uid']);
 622                                 $arr['uid'] = $importer['uid'];
 623                                 $arr['contact-id'] = $self[0]['id'];
 624                                 $arr['wall'] = 1;
 625                                 $arr['type'] = 'wall';
 626                                 $arr['gravity'] = 0;
 627                                 $arr['origin'] = 1;
 628                                 $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 629                                 $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 630                                 $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 631                                 $arr['verb'] = ACTIVITY_FRIEND;
 632                                 $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 633
 634                                 $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 635                                 $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 636                                 $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 637                                 $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
 638
 639                                 $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 640                                         . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 641                                 $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 642                                 $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 643                                 $arr['object'] .= '</link></object>' . "\n";
 644                                 $arr['last-child'] = 1;
 645
 646                                 $arr['allow_cid'] = $user[0]['allow_cid'];
 647                                 $arr['allow_gid'] = $user[0]['allow_gid'];
 648                                 $arr['deny_cid']  = $user[0]['deny_cid'];
 649                                 $arr['deny_gid']  = $user[0]['deny_gid'];
 650
 651                                 $i = item_store($arr);
 652                                 if($i)
 653                                 proc_run('php',"include/notifier.php","activity","$i");
 654
 655                         }
 656
 657                 }
 658
 659                 return;
 660         }
 661
 662         $ret = find_diaspora_person_by_handle($sender_handle);
 663
 664
 665         if((! count($ret)) || ($ret['network'] != NETWORK_DIASPORA)) {
 666                 logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle);
 667                 return;
 668         }
 669
 670         $batch = (($ret['batch']) ? $ret['batch'] : implode('/', array_slice(explode('/',$ret['url']),0,3)) . '/receive/public');
 671
 672
 673
 674         $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
 675                 VALUES ( %d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d) ",
 676                 intval($importer['uid']),
 677                 dbesc($ret['network']),
 678                 dbesc($ret['addr']),
 679                 datetime_convert(),
 680                 dbesc($ret['url']),
 681                 dbesc(normalise_link($ret['url'])),
 682                 dbesc($batch),
 683                 dbesc($ret['name']),
 684                 dbesc($ret['nick']),
 685                 dbesc($ret['photo']),
 686                 dbesc($ret['pubkey']),
 687                 dbesc($ret['notify']),
 688                 dbesc($ret['poll']),
 689                 1,
 690                 2
 691         );
 692
 693         // find the contact record we just created
 694
 695         $contact_record = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
 696
 697         if(! $contact_record) {
 698                 logger('diaspora_request: unable to locate newly created contact record.');
 699                 return;
 700         }
 701
 702         $g = q("select def_gid from user where uid = %d limit 1",
 703                 intval($importer['uid'])
 704         );
 705         if($g && intval($g[0]['def_gid'])) {
 706                 require_once('include/group.php');
 707                 group_add_member($importer['uid'],'',$contact_record['id'],$g[0]['def_gid']);
 708         }
 709
 710         if($importer['page-flags'] == PAGE_NORMAL) {
 711
 712                 $hash = random_string() . (string) time();   // Generate a confirm_key
 713
 714                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime` )
 715                         VALUES ( %d, %d, %d, %d, '%s', '%s', '%s' )",
 716                         intval($importer['uid']),
 717                         intval($contact_record['id']),
 718                         0,
 719                         0,
 720                         dbesc( t('Sharing notification from Diaspora network')),
 721                         dbesc($hash),
 722                         dbesc(datetime_convert())
 723                 );
 724         }
 725         else {
 726
 727                 // automatic friend approval
 728
 729                 require_once('include/Photo.php');
 730
 731                 $photos = import_profile_photo($contact_record['photo'],$importer['uid'],$contact_record['id']);
 732
 733                 // technically they are sharing with us (CONTACT_IS_SHARING),
 734                 // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
 735                 // we are going to change the relationship and make them a follower.
 736
 737                 if($importer['page-flags'] == PAGE_FREELOVE)
 738                         $new_relation = CONTACT_IS_FRIEND;
 739                 else
 740                         $new_relation = CONTACT_IS_FOLLOWER;
 741
 742                 $r = q("UPDATE `contact` SET
 743                         `photo` = '%s',
 744                         `thumb` = '%s',
 745                         `micro` = '%s',
 746                         `rel` = %d,
 747                         `name-date` = '%s',
 748                         `uri-date` = '%s',
 749                         `avatar-date` = '%s',
 750                         `blocked` = 0,
 751                         `pending` = 0,
 752                         `writable` = 1
 753                         WHERE `id` = %d
 754                         ",
 755                         dbesc($photos[0]),
 756                         dbesc($photos[1]),
 757                         dbesc($photos[2]),
 758                         intval($new_relation),
 759                         dbesc(datetime_convert()),
 760                         dbesc(datetime_convert()),
 761                         dbesc(datetime_convert()),
 762                         intval($contact_record['id'])
 763                 );
 764
 765                 $u = q("select * from user where uid = %d limit 1",intval($importer['uid']));
 766                 if($u)
 767                         $ret = diaspora_share($u[0],$contact_record);
 768         }
 769
 770         return;
 771 }
 772
 773 function diaspora_post_allow($importer,$contact, $is_comment = false) {
 774
 775         // perhaps we were already sharing with this person. Now they're sharing with us.
 776         // That makes us friends.
 777         // Normally this should have handled by getting a request - but this could get lost
 778         if($contact['rel'] == CONTACT_IS_FOLLOWER && in_array($importer['page-flags'], array(PAGE_FREELOVE))) {
 779                 q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
 780                         intval(CONTACT_IS_FRIEND),
 781                         intval($contact['id']),
 782                         intval($importer['uid'])
 783                 );
 784                 $contact['rel'] = CONTACT_IS_FRIEND;
 785                 logger('diaspora_post_allow: defining user '.$contact["nick"].' as friend');
 786         }
 787
 788         if(($contact['blocked']) || ($contact['readonly']) || ($contact['archive']))
 789                 return false;
 790         if($contact['rel'] == CONTACT_IS_SHARING || $contact['rel'] == CONTACT_IS_FRIEND)
 791                 return true;
 792         if($contact['rel'] == CONTACT_IS_FOLLOWER)
 793                 if(($importer['page-flags'] == PAGE_COMMUNITY) OR $is_comment)
 794                         return true;
 795
 796         // Messages for the global users are always accepted
 797         if ($importer['uid'] == 0)
 798                 return true;
 799
 800         return false;
 801 }
 802
 803 function diaspora_is_redmatrix($url) {
 804         return(strstr($url, "/channel/"));
 805 }
 806
 807 function diaspora_plink($addr, $guid) {
 808         $r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr));
 809
 810         // Fallback
 811         if (!$r)
 812                 return 'https://'.substr($addr,strpos($addr,'@')+1).'/posts/'.$guid;
 813
 814         // Friendica contacts are often detected as Diaspora contacts in the "fcontact" table
 815         // So we try another way as well.
 816         $s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"])));
 817         if ($s)
 818                 $r[0]["network"] = $s[0]["network"];
 819
 820         if ($r[0]["network"] == NETWORK_DFRN)
 821                 return(str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/"));
 822
 823         if (diaspora_is_redmatrix($r[0]["url"]))
 824                 return $r[0]["url"]."/?f=&mid=".$guid;
 825
 826         return 'https://'.substr($addr,strpos($addr,'@')+1).'/posts/'.$guid;
 827 }
 828
 829 function diaspora_repair_signature($signature, $handle = "", $level = 1) {
 830         if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) {
 831                 $signature = base64_decode($signature);
 832                 logger("Repaired double encoded signature from Diaspora/Hubzilla handle ".$handle." - level ".$level, LOGGER_DEBUG);
 833
 834                 // Do a recursive call to be able to fix even multiple levels
 835                 if ($level < 10)
 836                         $signature = diaspora_repair_signature($signature, $handle, ++$level);
 837         }
 838
 839         return($signature);
 840 }
 841
 842 function diaspora_post($importer,$xml,$msg) {
 843
 844         $a = get_app();
 845         $guid = notags(unxmlify($xml->guid));
 846         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
 847
 848         if($diaspora_handle != $msg['author']) {
 849                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
 850                 return 202;
 851         }
 852
 853         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
 854         if(! $contact) {
 855                 logger('diaspora_post: A Contact for handle '.$diaspora_handle.' and user '.$importer['uid'].' was not found');
 856                 return 203;
 857         }
 858
 859         if(! diaspora_post_allow($importer,$contact, false)) {
 860                 logger('diaspora_post: Ignoring this author.');
 861                 return 202;
 862         }
 863
 864         $message_id = $diaspora_handle . ':' . $guid;
 865         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
 866                 intval($importer['uid']),
 867                 dbesc($guid)
 868         );
 869         if(count($r)) {
 870                 logger('diaspora_post: message exists: ' . $guid);
 871                 return 208;
 872         }
 873
 874         $created = unxmlify($xml->created_at);
 875         $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
 876
 877         $body = diaspora2bb($xml->raw_message);
 878
 879         $datarray = array();
 880
 881         $datarray["object"] = json_encode($xml);
 882
 883         if($xml->photo->remote_photo_path AND $xml->photo->remote_photo_name)
 884                 $datarray["object-type"] = ACTIVITY_OBJ_PHOTO;
 885         else {
 886                 $datarray['object-type'] = ACTIVITY_OBJ_NOTE;
 887                 // Add OEmbed and other information to the body
 888                 if (!diaspora_is_redmatrix($contact['url']))
 889                         $body = add_page_info_to_body($body, false, true);
 890         }
 891
 892         $str_tags = '';
 893
 894         $cnt = preg_match_all('/@\[url=(.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
 895         if($cnt) {
 896                 foreach($matches as $mtch) {
 897                         if(strlen($str_tags))
 898                                 $str_tags .= ',';
 899                         $str_tags .= '@[url=' . $mtch[1] . '[/url]';
 900                 }
 901         }
 902
 903         $plink = diaspora_plink($diaspora_handle, $guid);
 904
 905         $datarray['uid'] = $importer['uid'];
 906         $datarray['contact-id'] = $contact['id'];
 907         $datarray['wall'] = 0;
 908         $datarray['network'] = NETWORK_DIASPORA;
 909         $datarray['verb'] = ACTIVITY_POST;
 910         $datarray['guid'] = $guid;
 911         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
 912         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
 913         $datarray['private'] = $private;
 914         $datarray['parent'] = 0;
 915         $datarray['plink'] = $plink;
 916         $datarray['owner-name'] = $contact['name'];
 917         $datarray['owner-link'] = $contact['url'];
 918         //$datarray['owner-avatar'] = $contact['thumb'];
 919         $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
 920         $datarray['author-name'] = $contact['name'];
 921         $datarray['author-link'] = $contact['url'];
 922         $datarray['author-avatar'] = $contact['thumb'];
 923         $datarray['body'] = $body;
 924         $datarray['tag'] = $str_tags;
 925         if ($xml->provider_display_name)
 926                 $datarray["app"] = unxmlify($xml->provider_display_name);
 927         else
 928                 $datarray['app']  = 'Diaspora';
 929
 930         // if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible.
 931
 932         $datarray['visible'] = ((strlen($body)) ? 1 : 0);
 933
 934         DiasporaFetchGuid($datarray);
 935         $message_id = item_store($datarray);
 936
 937         logger("Stored item with message id ".$message_id, LOGGER_DEBUG);
 938
 939         return 201;
 940
 941 }
 942
 943 function DiasporaFetchGuid($item) {
 944         preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
 945                 function ($match) use ($item){
 946                         return(DiasporaFetchGuidSub($match, $item));
 947                 },$item["body"]);
 948 }
 949
 950 function DiasporaFetchGuidSub($match, $item) {
 951         $a = get_app();
 952
 953         if (!diaspora_store_by_guid($match[1], $item["author-link"]))
 954                 diaspora_store_by_guid($match[1], $item["owner-link"]);
 955 }
 956
 957 function diaspora_store_by_guid($guid, $server, $uid = 0) {
 958         require_once("include/Contact.php");
 959
 960         $serverparts = parse_url($server);
 961         $server = $serverparts["scheme"]."://".$serverparts["host"];
 962
 963         logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
 964
 965         $item = diaspora_fetch_message($guid, $server);
 966
 967         if (!$item)
 968                 return false;
 969
 970         logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
 971
 972         $body = $item["body"];
 973         $str_tags = $item["tag"];
 974         $app = $item["app"];
 975         $created = $item["created"];
 976         $author = $item["author"];
 977         $guid = $item["guid"];
 978         $private = $item["private"];
 979         $object = $item["object"];
 980         $objecttype = $item["object-type"];
 981
 982         $message_id = $author.':'.$guid;
 983         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
 984                 intval($uid),
 985                 dbesc($guid)
 986         );
 987         if(count($r))
 988                 return $r[0]["id"];
 989
 990         $person = find_diaspora_person_by_handle($author);
 991
 992         $contact_id = get_contact($person['url'], $uid);
 993
 994         $contacts = q("SELECT * FROM `contact` WHERE `id` = %d", intval($contact_id));
 995         $importers = q("SELECT * FROM `user` WHERE `uid` = %d", intval($uid));
 996
 997         if ($contacts AND $importers)
 998                 if(!diaspora_post_allow($importers[0],$contacts[0], false)) {
 999                         logger('Ignoring author '.$person['url'].' for uid '.$uid);
1000                         return false;
1001                 } else
1002                         logger('Author '.$person['url'].' is allowed for uid '.$uid);
1003
1004         $datarray = array();
1005         $datarray['uid'] = $uid;
1006         $datarray['contact-id'] = $contact_id;
1007         $datarray['wall'] = 0;
1008         $datarray['network']  = NETWORK_DIASPORA;
1009         $datarray['guid'] = $guid;
1010         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
1011         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
1012         $datarray['private'] = $private;
1013         $datarray['parent'] = 0;
1014         $datarray['plink'] = diaspora_plink($author, $guid);
1015         $datarray['author-name'] = $person['name'];
1016         $datarray['author-link'] = $person['url'];
1017         $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1018         $datarray['owner-name'] = $datarray['author-name'];
1019         $datarray['owner-link'] = $datarray['author-link'];
1020         $datarray['owner-avatar'] = $datarray['author-avatar'];
1021         $datarray['body'] = $body;
1022         $datarray['tag'] = $str_tags;
1023         $datarray['app']  = $app;
1024         $datarray['visible'] = ((strlen($body)) ? 1 : 0);
1025         $datarray['object'] = $object;
1026         $datarray['object-type'] = $objecttype;
1027
1028         if ($datarray['contact-id'] == 0)
1029                 return false;
1030
1031         DiasporaFetchGuid($datarray);
1032         $message_id = item_store($datarray);
1033
1034         /// @TODO
1035         /// Looking if there is some subscribe mechanism in Diaspora to get all comments for this post
1036
1037         return $message_id;
1038 }
1039
1040 function diaspora_fetch_message($guid, $server, $level = 0) {
1041
1042         if ($level > 5)
1043                 return false;
1044
1045         $a = get_app();
1046
1047         // This will not work if the server is not a Diaspora server
1048         $source_url = $server.'/p/'.$guid.'.xml';
1049         $x = fetch_url($source_url);
1050         if(!$x)
1051                 return false;
1052
1053         $x = str_replace(array('<activity_streams-photo>','</activity_streams-photo>'),array('<asphoto>','</asphoto>'),$x);
1054         $source_xml = parse_xml_string($x,false);
1055
1056         $item = array();
1057         $item["app"] = 'Diaspora';
1058         $item["guid"] = $guid;
1059         $body = "";
1060
1061         if ($source_xml->post->status_message->created_at)
1062                 $item["created"] = unxmlify($source_xml->post->status_message->created_at);
1063
1064         if ($source_xml->post->status_message->provider_display_name)
1065                 $item["app"] = unxmlify($source_xml->post->status_message->provider_display_name);
1066
1067         if ($source_xml->post->status_message->diaspora_handle)
1068                 $item["author"] = unxmlify($source_xml->post->status_message->diaspora_handle);
1069
1070         if ($source_xml->post->status_message->guid)
1071                 $item["guid"] = unxmlify($source_xml->post->status_message->guid);
1072
1073         $item["private"] = (unxmlify($source_xml->post->status_message->public) == 'false');
1074         $item["object"] = json_encode($source_xml->post);
1075
1076         if(strlen($source_xml->post->asphoto->objectId) && ($source_xml->post->asphoto->objectId != 0) && ($source_xml->post->asphoto->image_url)) {
1077                 $item["object-type"] = ACTIVITY_OBJ_PHOTO;
1078                 $body = '[url=' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '][img]' . notags(unxmlify($source_xml->post->asphoto->objectId)) . '[/img][/url]' . "\n";
1079                 $body = scale_external_images($body,false);
1080         } elseif($source_xml->post->asphoto->image_url) {
1081                 $item["object-type"] = ACTIVITY_OBJ_PHOTO;
1082                 $body = '[img]' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '[/img]' . "\n";
1083                 $body = scale_external_images($body);
1084         } elseif($source_xml->post->status_message) {
1085                 $body = diaspora2bb($source_xml->post->status_message->raw_message);
1086
1087                 // Checking for embedded pictures
1088                 if($source_xml->post->status_message->photo->remote_photo_path AND
1089                         $source_xml->post->status_message->photo->remote_photo_name) {
1090
1091                         $item["object-type"] = ACTIVITY_OBJ_PHOTO;
1092
1093                         $remote_photo_path = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_path));
1094                         $remote_photo_name = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_name));
1095
1096                         $body = '[img]'.$remote_photo_path.$remote_photo_name.'[/img]'."\n".$body;
1097
1098                         logger('embedded picture link found: '.$body, LOGGER_DEBUG);
1099                 } else
1100                         $item["object-type"] = ACTIVITY_OBJ_NOTE;
1101
1102                 $body = scale_external_images($body);
1103
1104                 // Add OEmbed and other information to the body
1105                 /// @TODO It could be a repeated redmatrix item
1106                 /// Then we shouldn't add further data to it
1107                 if ($item["object-type"] == ACTIVITY_OBJ_NOTE)
1108                         $body = add_page_info_to_body($body, false, true);
1109
1110         } elseif($source_xml->post->reshare) {
1111                 // Reshare of a reshare
1112                 return diaspora_fetch_message($source_xml->post->reshare->root_guid, $server, ++$level);
1113         } else {
1114                 // Maybe it is a reshare of a photo that will be delivered at a later time (testing)
1115                 logger('no content found: '.print_r($source_xml,true));
1116                 return false;
1117         }
1118
1119         if (trim($body) == "")
1120                 return false;
1121
1122         $item["tag"] = '';
1123         $item["body"] = $body;
1124
1125         return $item;
1126 }
1127
1128 function diaspora_reshare($importer,$xml,$msg) {
1129
1130         logger('diaspora_reshare: init: ' . print_r($xml,true));
1131
1132         $a = get_app();
1133         $guid = notags(unxmlify($xml->guid));
1134         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1135
1136
1137         if($diaspora_handle != $msg['author']) {
1138                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
1139                 return 202;
1140         }
1141
1142         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
1143         if(! $contact)
1144                 return;
1145
1146         if(! diaspora_post_allow($importer,$contact, false)) {
1147                 logger('diaspora_reshare: Ignoring this author: ' . $diaspora_handle . ' ' . print_r($xml,true));
1148                 return 202;
1149         }
1150
1151         $message_id = $diaspora_handle . ':' . $guid;
1152         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1153                 intval($importer['uid']),
1154                 dbesc($guid)
1155         );
1156         if(count($r)) {
1157                 logger('diaspora_reshare: message exists: ' . $guid);
1158                 return;
1159         }
1160
1161         $orig_author = notags(unxmlify($xml->root_diaspora_id));
1162         $orig_guid = notags(unxmlify($xml->root_guid));
1163         $orig_url = $a->get_baseurl()."/display/".$orig_guid;
1164
1165         $create_original_post = false;
1166
1167         // Do we already have this item?
1168         $r = q("SELECT `body`, `tag`, `app`, `created`, `plink`, `object`, `object-type`, `uri` FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
1169                 dbesc($orig_guid),
1170                 dbesc(NETWORK_DIASPORA)
1171         );
1172         if(count($r)) {
1173                 logger('reshared message '.$orig_guid." reshared by ".$guid.' already exists on system.');
1174
1175                 // Maybe it is already a reshared item?
1176                 // Then refetch the content, since there can be many side effects with reshared posts from other networks or reshares from reshares
1177                 require_once('include/api.php');
1178                 if (api_share_as_retweet($r[0]))
1179                         $r = array();
1180                 else {
1181                         $body = $r[0]["body"];
1182                         $str_tags = $r[0]["tag"];
1183                         $app = $r[0]["app"];
1184                         $orig_created = $r[0]["created"];
1185                         $orig_plink = $r[0]["plink"];
1186                         $orig_uri = $r[0]["uri"];
1187                         $object = $r[0]["object"];
1188                         $objecttype = $r[0]["object-type"];
1189                 }
1190         }
1191
1192         if (!count($r)) {
1193                 $body = "";
1194                 $str_tags = "";
1195                 $app = "";
1196
1197                 $server = 'https://'.substr($orig_author,strpos($orig_author,'@')+1);
1198                 logger('1st try: reshared message '.$orig_guid." reshared by ".$guid.' will be fetched from original server: '.$server);
1199                 $item = diaspora_fetch_message($orig_guid, $server);
1200
1201                 if (!$item) {
1202                         $server = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1);
1203                         logger('2nd try: reshared message '.$orig_guid." reshared by ".$guid." will be fetched from sharer's server: ".$server);
1204                         $item = diaspora_fetch_message($orig_guid, $server);
1205                 }
1206                 if (!$item) {
1207                         $server = 'http://'.substr($orig_author,strpos($orig_author,'@')+1);
1208                         logger('3rd try: reshared message '.$orig_guid." reshared by ".$guid.' will be fetched from original server: '.$server);
1209                         $item = diaspora_fetch_message($orig_guid, $server);
1210                 }
1211                 if (!$item) {
1212                         $server = 'http://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1);
1213                         logger('4th try: reshared message '.$orig_guid." reshared by ".$guid." will be fetched from sharer's server: ".$server);
1214                         $item = diaspora_fetch_message($orig_guid, $server);
1215                 }
1216
1217                 if ($item) {
1218                         $body = $item["body"];
1219                         $str_tags = $item["tag"];
1220                         $app = $item["app"];
1221                         $orig_created = $item["created"];
1222                         $orig_author = $item["author"];
1223                         $orig_guid = $item["guid"];
1224                         $orig_plink = diaspora_plink($orig_author, $orig_guid);
1225                         $orig_uri = $orig_author.':'.$orig_guid;
1226                         $create_original_post = ($body != "");
1227                         $object = $item["object"];
1228                         $objecttype = $item["object-type"];
1229                 }
1230         }
1231
1232         $plink = diaspora_plink($diaspora_handle, $guid);
1233
1234         $person = find_diaspora_person_by_handle($orig_author);
1235
1236         $created = unxmlify($xml->created_at);
1237         $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
1238
1239         $datarray = array();
1240
1241         $datarray['uid'] = $importer['uid'];
1242         $datarray['contact-id'] = $contact['id'];
1243         $datarray['wall'] = 0;
1244         $datarray['network']  = NETWORK_DIASPORA;
1245         $datarray['guid'] = $guid;
1246         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
1247         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
1248         $datarray['private'] = $private;
1249         $datarray['parent'] = 0;
1250         $datarray['plink'] = $plink;
1251         $datarray['owner-name'] = $contact['name'];
1252         $datarray['owner-link'] = $contact['url'];
1253         $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
1254         if (!intval(get_config('system','wall-to-wall_share'))) {
1255                 $prefix = share_header($person['name'], $person['url'], ((x($person,'thumb')) ? $person['thumb'] : $person['photo']), $orig_guid, $orig_created, $orig_url);
1256
1257                 $datarray['author-name'] = $contact['name'];
1258                 $datarray['author-link'] = $contact['url'];
1259                 $datarray['author-avatar'] = $contact['thumb'];
1260                 $datarray['body'] = $prefix.$body."[/share]";
1261         } else {
1262                 // Let reshared messages look like wall-to-wall posts
1263                 $datarray['author-name'] = $person['name'];
1264                 $datarray['author-link'] = $person['url'];
1265                 $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1266                 $datarray['body'] = $body;
1267         }
1268
1269         $datarray["object"] = json_encode($xml);
1270         $datarray['object-type'] = $objecttype;
1271
1272         $datarray['tag'] = $str_tags;
1273         $datarray['app']  = $app;
1274
1275         // if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible. (testing)
1276         $datarray['visible'] = ((strlen($body)) ? 1 : 0);
1277
1278         // Store the original item of a reshare
1279         if ($create_original_post) {
1280                 require_once("include/Contact.php");
1281
1282                 $datarray2 = $datarray;
1283
1284                 $datarray2['uid'] = 0;
1285                 $datarray2['contact-id'] = get_contact($person['url'], 0);
1286                 $datarray2['guid'] = $orig_guid;
1287                 $datarray2['uri'] = $datarray2['parent-uri'] = $orig_uri;
1288                 $datarray2['changed'] = $datarray2['created'] = $datarray2['edited'] = $datarray2['commented'] = $datarray2['received'] = datetime_convert('UTC','UTC',$orig_created);
1289                 $datarray2['parent'] = 0;
1290                 $datarray2['plink'] = $orig_plink;
1291
1292                 $datarray2['author-name'] = $person['name'];
1293                 $datarray2['author-link'] = $person['url'];
1294                 $datarray2['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1295                 $datarray2['owner-name'] = $datarray2['author-name'];
1296                 $datarray2['owner-link'] = $datarray2['author-link'];
1297                 $datarray2['owner-avatar'] = $datarray2['author-avatar'];
1298                 $datarray2['body'] = $body;
1299                 $datarray2["object"] = $object;
1300
1301                 DiasporaFetchGuid($datarray2);
1302                 $message_id = item_store($datarray2);
1303
1304                 logger("Store original item ".$orig_guid." under message id ".$message_id);
1305         }
1306
1307         DiasporaFetchGuid($datarray);
1308         $message_id = item_store($datarray);
1309
1310         return;
1311
1312 }
1313
1314
1315 function diaspora_asphoto($importer,$xml,$msg) {
1316         logger('diaspora_asphoto called');
1317
1318         $a = get_app();
1319         $guid = notags(unxmlify($xml->guid));
1320         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1321
1322         if($diaspora_handle != $msg['author']) {
1323                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
1324                 return 202;
1325         }
1326
1327         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
1328         if(! $contact)
1329                 return;
1330
1331         if(! diaspora_post_allow($importer,$contact, false)) {
1332                 logger('diaspora_asphoto: Ignoring this author.');
1333                 return 202;
1334         }
1335
1336         $message_id = $diaspora_handle . ':' . $guid;
1337         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1338                 intval($importer['uid']),
1339                 dbesc($guid)
1340         );
1341         if(count($r)) {
1342                 logger('diaspora_asphoto: message exists: ' . $guid);
1343                 return;
1344         }
1345
1346         $created = unxmlify($xml->created_at);
1347         $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
1348
1349         if(strlen($xml->objectId) && ($xml->objectId != 0) && ($xml->image_url)) {
1350                 $body = '[url=' . notags(unxmlify($xml->image_url)) . '][img]' . notags(unxmlify($xml->objectId)) . '[/img][/url]' . "\n";
1351                 $body = scale_external_images($body,false);
1352         }
1353         elseif($xml->image_url) {
1354                 $body = '[img]' . notags(unxmlify($xml->image_url)) . '[/img]' . "\n";
1355                 $body = scale_external_images($body);
1356         }
1357         else {
1358                 logger('diaspora_asphoto: no photo url found.');
1359                 return;
1360         }
1361
1362         $plink = diaspora_plink($diaspora_handle, $guid);
1363
1364         $datarray = array();
1365
1366         $datarray['uid'] = $importer['uid'];
1367         $datarray['contact-id'] = $contact['id'];
1368         $datarray['wall'] = 0;
1369         $datarray['network']  = NETWORK_DIASPORA;
1370         $datarray['guid'] = $guid;
1371         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
1372         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
1373         $datarray['private'] = $private;
1374         $datarray['parent'] = 0;
1375         $datarray['plink'] = $plink;
1376         $datarray['owner-name'] = $contact['name'];
1377         $datarray['owner-link'] = $contact['url'];
1378         //$datarray['owner-avatar'] = $contact['thumb'];
1379         $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
1380         $datarray['author-name'] = $contact['name'];
1381         $datarray['author-link'] = $contact['url'];
1382         $datarray['author-avatar'] = $contact['thumb'];
1383         $datarray['body'] = $body;
1384         $datarray["object"] = json_encode($xml);
1385         $datarray['object-type'] = ACTIVITY_OBJ_PHOTO;
1386
1387         $datarray['app']  = 'Diaspora/Cubbi.es';
1388
1389         DiasporaFetchGuid($datarray);
1390         $message_id = item_store($datarray);
1391
1392         //if($message_id) {
1393         //      q("update item set plink = '%s' where id = %d",
1394         //              dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
1395         //              intval($message_id)
1396         //      );
1397         //}
1398
1399         return;
1400
1401 }
1402
1403 function diaspora_comment($importer,$xml,$msg) {
1404
1405         $a = get_app();
1406         $guid = notags(unxmlify($xml->guid));
1407         $parent_guid = notags(unxmlify($xml->parent_guid));
1408         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1409         $target_type = notags(unxmlify($xml->target_type));
1410         $text = unxmlify($xml->text);
1411         $author_signature = notags(unxmlify($xml->author_signature));
1412
1413         $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
1414
1415         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1416         if(! $contact) {
1417                 logger('diaspora_comment: cannot find contact: ' . $msg['author']);
1418                 return;
1419         }
1420
1421         if(! diaspora_post_allow($importer,$contact, true)) {
1422                 logger('diaspora_comment: Ignoring this author.');
1423                 return 202;
1424         }
1425
1426         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1427                 intval($importer['uid']),
1428                 dbesc($guid)
1429         );
1430         if(count($r)) {
1431                 logger('diaspora_comment: our comment just got relayed back to us (or there was a guid collision) : ' . $guid);
1432                 return;
1433         }
1434
1435         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1436                 intval($importer['uid']),
1437                 dbesc($parent_guid)
1438         );
1439
1440         if(!count($r)) {
1441                 $result = diaspora_store_by_guid($parent_guid, $contact['url'], $importer['uid']);
1442
1443                 if (!$result) {
1444                         $person = find_diaspora_person_by_handle($diaspora_handle);
1445                         $result = diaspora_store_by_guid($parent_guid, $person['url'], $importer['uid']);
1446                 }
1447
1448                 if ($result) {
1449                         logger("Fetched missing item ".$parent_guid." - result: ".$result, LOGGER_DEBUG);
1450
1451                         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1452                                 intval($importer['uid']),
1453                                 dbesc($parent_guid)
1454                         );
1455                 }
1456         }
1457
1458         if(! count($r)) {
1459                 logger('diaspora_comment: parent item not found: parent: ' . $parent_guid . ' item: ' . $guid);
1460                 return;
1461         }
1462         $parent_item = $r[0];
1463
1464
1465         /* How Diaspora performs comment signature checking:
1466
1467            - If an item has been sent by the comment author to the top-level post owner to relay on
1468              to the rest of the contacts on the top-level post, the top-level post owner should check
1469              the author_signature, then create a parent_author_signature before relaying the comment on
1470            - If an item has been relayed on by the top-level post owner, the contacts who receive it
1471              check only the parent_author_signature. Basically, they trust that the top-level post
1472              owner has already verified the authenticity of anything he/she sends out
1473            - In either case, the signature that get checked is the signature created by the person
1474              who sent the salmon
1475         */
1476
1477         $signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
1478         $key = $msg['key'];
1479
1480         if($parent_author_signature) {
1481                 // If a parent_author_signature exists, then we've received the comment
1482                 // relayed from the top-level post owner. There's no need to check the
1483                 // author_signature if the parent_author_signature is valid
1484
1485                 $parent_author_signature = base64_decode($parent_author_signature);
1486
1487                 if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
1488                         logger('diaspora_comment: top-level owner verification failed.');
1489                         return;
1490                 }
1491         }
1492         else {
1493                 // If there's no parent_author_signature, then we've received the comment
1494                 // from the comment creator. In that case, the person is commenting on
1495                 // our post, so he/she must be a contact of ours and his/her public key
1496                 // should be in $msg['key']
1497
1498                 $author_signature = base64_decode($author_signature);
1499
1500                 if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
1501                         logger('diaspora_comment: comment author verification failed.');
1502                         return;
1503                 }
1504         }
1505
1506         // Phew! Everything checks out. Now create an item.
1507
1508         // Find the original comment author information.
1509         // We need this to make sure we display the comment author
1510         // information (name and avatar) correctly.
1511         if(strcasecmp($diaspora_handle,$msg['author']) == 0)
1512                 $person = $contact;
1513         else {
1514                 $person = find_diaspora_person_by_handle($diaspora_handle);
1515
1516                 if(! is_array($person)) {
1517                         logger('diaspora_comment: unable to find author details');
1518                         return;
1519                 }
1520         }
1521
1522         // Fetch the contact id - if we know this contact
1523         $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
1524                 dbesc(normalise_link($person['url'])), intval($importer['uid']));
1525         if ($r) {
1526                 $cid = $r[0]['id'];
1527                 $network = $r[0]['network'];
1528         } else {
1529                 $cid = $contact['id'];
1530                 $network = NETWORK_DIASPORA;
1531         }
1532
1533         $body = diaspora2bb($text);
1534         $message_id = $diaspora_handle . ':' . $guid;
1535
1536         $datarray = array();
1537
1538         $datarray['uid'] = $importer['uid'];
1539         $datarray['contact-id'] = $cid;
1540         $datarray['type'] = 'remote-comment';
1541         $datarray['wall'] = $parent_item['wall'];
1542         $datarray['network']  = $network;
1543         $datarray['verb'] = ACTIVITY_POST;
1544         $datarray['gravity'] = GRAVITY_COMMENT;
1545         $datarray['guid'] = $guid;
1546         $datarray['uri'] = $message_id;
1547         $datarray['parent-uri'] = $parent_item['uri'];
1548
1549         // No timestamps for comments? OK, we'll the use current time.
1550         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert();
1551         $datarray['private'] = $parent_item['private'];
1552
1553         $datarray['owner-name'] = $parent_item['owner-name'];
1554         $datarray['owner-link'] = $parent_item['owner-link'];
1555         $datarray['owner-avatar'] = $parent_item['owner-avatar'];
1556
1557         $datarray['author-name'] = $person['name'];
1558         $datarray['author-link'] = $person['url'];
1559         $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1560         $datarray['body'] = $body;
1561         $datarray["object"] = json_encode($xml);
1562         $datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
1563
1564         // We can't be certain what the original app is if the message is relayed.
1565         if(($parent_item['origin']) && (! $parent_author_signature))
1566                 $datarray['app']  = 'Diaspora';
1567
1568         DiasporaFetchGuid($datarray);
1569         $message_id = item_store($datarray);
1570
1571         $datarray['id'] = $message_id;
1572
1573         //if($message_id) {
1574                 //q("update item set plink = '%s' where id = %d",
1575                 //      //dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
1576                 //      dbesc($a->get_baseurl().'/display/'.$datarray['guid']),
1577                 //      intval($message_id)
1578                 //);
1579         //}
1580
1581         // If we are the origin of the parent we store the original signature and notify our followers
1582         if($parent_item['origin']) {
1583                 $author_signature_base64 = base64_encode($author_signature);
1584                 $author_signature_base64 = diaspora_repair_signature($author_signature_base64, $diaspora_handle);
1585
1586                 q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
1587                         intval($message_id),
1588                         dbesc($signed_data),
1589                         dbesc($author_signature_base64),
1590                         dbesc($diaspora_handle)
1591                 );
1592
1593                 // notify others
1594                 proc_run('php','include/notifier.php','comment-import',$message_id);
1595         }
1596
1597         $myconv = q("SELECT `author-link`, `author-avatar`, `parent` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `parent` != 0 AND `deleted` = 0 ",
1598                 dbesc($parent_item['uri']),
1599                 intval($importer['uid'])
1600         );
1601
1602         if(count($myconv)) {
1603                 $importer_url = $a->get_baseurl() . '/profile/' . $importer['nickname'];
1604
1605                 foreach($myconv as $conv) {
1606
1607                         // now if we find a match, it means we're in this conversation
1608
1609                         if(! link_compare($conv['author-link'],$importer_url))
1610                                 continue;
1611
1612                         require_once('include/enotify.php');
1613
1614                         $conv_parent = $conv['parent'];
1615
1616                         notification(array(
1617                                 'type'         => NOTIFY_COMMENT,
1618                                 'notify_flags' => $importer['notify-flags'],
1619                                 'language'     => $importer['language'],
1620                                 'to_name'      => $importer['username'],
1621                                 'to_email'     => $importer['email'],
1622                                 'uid'          => $importer['uid'],
1623                                 'item'         => $datarray,
1624                                 'link'             => $a->get_baseurl().'/display/'.urlencode($datarray['guid']),
1625                                 'source_name'  => $datarray['author-name'],
1626                                 'source_link'  => $datarray['author-link'],
1627                                 'source_photo' => $datarray['author-avatar'],
1628                                 'verb'         => ACTIVITY_POST,
1629                                 'otype'        => 'item',
1630                                 'parent'       => $conv_parent,
1631                                 'parent_uri'   => $parent_uri
1632                         ));
1633
1634                         // only send one notification
1635                         break;
1636                 }
1637         }
1638         return;
1639 }
1640
1641
1642
1643
1644 function diaspora_conversation($importer,$xml,$msg) {
1645
1646         $a = get_app();
1647
1648         $guid = notags(unxmlify($xml->guid));
1649         $subject = notags(unxmlify($xml->subject));
1650         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1651         $participant_handles = notags(unxmlify($xml->participant_handles));
1652         $created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
1653
1654         $parent_uri = $diaspora_handle . ':' . $guid;
1655
1656         $messages = $xml->message;
1657
1658         if(! count($messages)) {
1659                 logger('diaspora_conversation: empty conversation');
1660                 return;
1661         }
1662
1663         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1664         if(! $contact) {
1665                 logger('diaspora_conversation: cannot find contact: ' . $msg['author']);
1666                 return;
1667         }
1668
1669         if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
1670                 logger('diaspora_conversation: Ignoring this author.');
1671                 return 202;
1672         }
1673
1674         $conversation = null;
1675
1676         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
1677                 intval($importer['uid']),
1678                 dbesc($guid)
1679         );
1680         if(count($c))
1681                 $conversation = $c[0];
1682         else {
1683                 $r = q("insert into conv (uid,guid,creator,created,updated,subject,recips) values(%d, '%s', '%s', '%s', '%s', '%s', '%s') ",
1684                         intval($importer['uid']),
1685                         dbesc($guid),
1686                         dbesc($diaspora_handle),
1687                         dbesc(datetime_convert('UTC','UTC',$created_at)),
1688                         dbesc(datetime_convert()),
1689                         dbesc($subject),
1690                         dbesc($participant_handles)
1691                 );
1692                 if($r)
1693                         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
1694                 intval($importer['uid']),
1695             dbesc($guid)
1696         );
1697             if(count($c))
1698             $conversation = $c[0];
1699         }
1700         if(! $conversation) {
1701                 logger('diaspora_conversation: unable to create conversation.');
1702                 return;
1703         }
1704
1705         foreach($messages as $mesg) {
1706
1707                 $reply = 0;
1708
1709                 $msg_guid = notags(unxmlify($mesg->guid));
1710                 $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
1711                 $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
1712                 $msg_author_signature = notags(unxmlify($mesg->author_signature));
1713                 $msg_text = unxmlify($mesg->text);
1714                 $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($mesg->created_at)));
1715                 $msg_diaspora_handle = notags(unxmlify($mesg->diaspora_handle));
1716                 $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
1717                 if($msg_conversation_guid != $guid) {
1718                         logger('diaspora_conversation: message conversation guid does not belong to the current conversation. ' . $xml);
1719                         continue;
1720                 }
1721
1722                 $body = diaspora2bb($msg_text);
1723                 $message_id = $msg_diaspora_handle . ':' . $msg_guid;
1724
1725                 $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
1726
1727                 $author_signature = base64_decode($msg_author_signature);
1728
1729                 if(strcasecmp($msg_diaspora_handle,$msg['author']) == 0) {
1730                         $person = $contact;
1731                         $key = $msg['key'];
1732                 }
1733                 else {
1734                         $person = find_diaspora_person_by_handle($msg_diaspora_handle);
1735
1736                         if(is_array($person) && x($person,'pubkey'))
1737                                 $key = $person['pubkey'];
1738                         else {
1739                                 logger('diaspora_conversation: unable to find author details');
1740                                 continue;
1741                         }
1742                 }
1743
1744                 if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
1745                         logger('diaspora_conversation: verification failed.');
1746                         continue;
1747                 }
1748
1749                 if($msg_parent_author_signature) {
1750                         $owner_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
1751
1752                         $parent_author_signature = base64_decode($msg_parent_author_signature);
1753
1754                         $key = $msg['key'];
1755
1756                         if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
1757                                 logger('diaspora_conversation: owner verification failed.');
1758                                 continue;
1759                         }
1760                 }
1761
1762                 $r = q("select id from mail where `uri` = '%s' limit 1",
1763                         dbesc($message_id)
1764                 );
1765                 if(count($r)) {
1766                         logger('diaspora_conversation: duplicate message already delivered.', LOGGER_DEBUG);
1767                         continue;
1768                 }
1769
1770                 q("insert into mail ( `uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) values ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
1771                         intval($importer['uid']),
1772                         dbesc($msg_guid),
1773                         intval($conversation['id']),
1774                         dbesc($person['name']),
1775                         dbesc($person['photo']),
1776                         dbesc($person['url']),
1777                         intval($contact['id']),
1778                         dbesc($subject),
1779                         dbesc($body),
1780                         0,
1781                         0,
1782                         dbesc($message_id),
1783                         dbesc($parent_uri),
1784                         dbesc($msg_created_at)
1785                 );
1786
1787                 q("update conv set updated = '%s' where id = %d",
1788                         dbesc(datetime_convert()),
1789                         intval($conversation['id'])
1790                 );
1791
1792                 require_once('include/enotify.php');
1793                 notification(array(
1794                         'type' => NOTIFY_MAIL,
1795                         'notify_flags' => $importer['notify-flags'],
1796                         'language' => $importer['language'],
1797                         'to_name' => $importer['username'],
1798                         'to_email' => $importer['email'],
1799                         'uid' =>$importer['uid'],
1800                         'item' => array('subject' => $subject, 'body' => $body),
1801                         'source_name' => $person['name'],
1802                         'source_link' => $person['url'],
1803                         'source_photo' => $person['thumb'],
1804                         'verb' => ACTIVITY_POST,
1805                         'otype' => 'mail'
1806                 ));
1807         }
1808
1809         return;
1810 }
1811
1812 function diaspora_message($importer,$xml,$msg) {
1813
1814         $a = get_app();
1815
1816         $msg_guid = notags(unxmlify($xml->guid));
1817         $msg_parent_guid = notags(unxmlify($xml->parent_guid));
1818         $msg_parent_author_signature = notags(unxmlify($xml->parent_author_signature));
1819         $msg_author_signature = notags(unxmlify($xml->author_signature));
1820         $msg_text = unxmlify($xml->text);
1821         $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
1822         $msg_diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1823         $msg_conversation_guid = notags(unxmlify($xml->conversation_guid));
1824
1825         $parent_uri = $msg_diaspora_handle . ':' . $msg_parent_guid;
1826
1827         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg_diaspora_handle);
1828         if(! $contact) {
1829                 logger('diaspora_message: cannot find contact: ' . $msg_diaspora_handle);
1830                 return;
1831         }
1832
1833         if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
1834                 logger('diaspora_message: Ignoring this author.');
1835                 return 202;
1836         }
1837
1838         $conversation = null;
1839
1840         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
1841                 intval($importer['uid']),
1842                 dbesc($msg_conversation_guid)
1843         );
1844         if(count($c))
1845                 $conversation = $c[0];
1846         else {
1847                 logger('diaspora_message: conversation not available.');
1848                 return;
1849         }
1850
1851         $reply = 0;
1852
1853         $body = diaspora2bb($msg_text);
1854         $message_id = $msg_diaspora_handle . ':' . $msg_guid;
1855
1856         $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($xml->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
1857
1858
1859         $author_signature = base64_decode($msg_author_signature);
1860
1861         $person = find_diaspora_person_by_handle($msg_diaspora_handle);
1862         if(is_array($person) && x($person,'pubkey'))
1863                 $key = $person['pubkey'];
1864         else {
1865                 logger('diaspora_message: unable to find author details');
1866                 return;
1867         }
1868
1869         if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
1870                 logger('diaspora_message: verification failed.');
1871                 return;
1872         }
1873
1874         $r = q("select id from mail where `uri` = '%s' and uid = %d limit 1",
1875                 dbesc($message_id),
1876                 intval($importer['uid'])
1877         );
1878         if(count($r)) {
1879                 logger('diaspora_message: duplicate message already delivered.', LOGGER_DEBUG);
1880                 return;
1881         }
1882
1883         q("insert into mail ( `uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) values ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
1884                 intval($importer['uid']),
1885                 dbesc($msg_guid),
1886                 intval($conversation['id']),
1887                 dbesc($person['name']),
1888                 dbesc($person['photo']),
1889                 dbesc($person['url']),
1890                 intval($contact['id']),
1891                 dbesc($conversation['subject']),
1892                 dbesc($body),
1893                 0,
1894                 1,
1895                 dbesc($message_id),
1896                 dbesc($parent_uri),
1897                 dbesc($msg_created_at)
1898         );
1899
1900         q("update conv set updated = '%s' where id = %d",
1901                 dbesc(datetime_convert()),
1902                 intval($conversation['id'])
1903         );
1904
1905         return;
1906 }
1907
1908 function diaspora_participation($importer,$xml) {
1909         logger("Unsupported message type 'participation' ".print_r($xml, true));
1910 }
1911
1912 function diaspora_photo($importer,$xml,$msg,$attempt=1) {
1913
1914         $a = get_app();
1915
1916         logger('diaspora_photo: init',LOGGER_DEBUG);
1917
1918         $remote_photo_path = notags(unxmlify($xml->remote_photo_path));
1919
1920         $remote_photo_name = notags(unxmlify($xml->remote_photo_name));
1921
1922         $status_message_guid = notags(unxmlify($xml->status_message_guid));
1923
1924         $guid = notags(unxmlify($xml->guid));
1925
1926         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1927
1928         $public = notags(unxmlify($xml->public));
1929
1930         $created_at = notags(unxmlify($xml_created_at));
1931
1932         logger('diaspora_photo: status_message_guid: ' . $status_message_guid, LOGGER_DEBUG);
1933
1934         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1935         if(! $contact) {
1936                 logger('diaspora_photo: contact record not found: ' . $msg['author'] . ' handle: ' . $diaspora_handle);
1937                 return;
1938         }
1939
1940         if(! diaspora_post_allow($importer,$contact, false)) {
1941                 logger('diaspora_photo: Ignoring this author.');
1942                 return 202;
1943         }
1944
1945         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1946                 intval($importer['uid']),
1947                 dbesc($status_message_guid)
1948         );
1949
1950 /*      deactivated by now since it can lead to multiplicated pictures in posts.
1951         if(!count($r)) {
1952                 $result = diaspora_store_by_guid($status_message_guid, $contact['url'], $importer['uid']);
1953
1954                 if (!$result) {
1955                         $person = find_diaspora_person_by_handle($diaspora_handle);
1956                         $result = diaspora_store_by_guid($status_message_guid, $person['url'], $importer['uid']);
1957                 }
1958
1959                 if ($result) {
1960                         logger("Fetched missing item ".$status_message_guid." - result: ".$result, LOGGER_DEBUG);
1961
1962                         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1963                                 intval($importer['uid']),
1964                                 dbesc($status_message_guid)
1965                         );
1966                 }
1967         }
1968 */
1969         if(!count($r)) {
1970                 if($attempt <= 3) {
1971                         q("INSERT INTO dsprphotoq (uid, msg, attempt) VALUES (%d, '%s', %d)",
1972                            intval($importer['uid']),
1973                            dbesc(serialize($msg)),
1974                            intval($attempt + 1)
1975                         );
1976                 }
1977
1978                 logger('diaspora_photo: attempt = ' . $attempt . '; status message not found: ' . $status_message_guid . ' for photo: ' . $guid);
1979                 return;
1980         }
1981
1982         $parent_item = $r[0];
1983
1984         $link_text = '[img]' . $remote_photo_path . $remote_photo_name . '[/img]' . "\n";
1985
1986         $link_text = scale_external_images($link_text, true,
1987                                            array($remote_photo_name, 'scaled_full_' . $remote_photo_name));
1988
1989         if(strpos($parent_item['body'],$link_text) === false) {
1990
1991                 $parent_item['body'] = $link_text . $parent_item['body'];
1992
1993                 $r = q("UPDATE `item` SET `body` = '%s', `visible` = 1 WHERE `id` = %d AND `uid` = %d",
1994                         dbesc($parent_item['body']),
1995                         intval($parent_item['id']),
1996                         intval($parent_item['uid'])
1997                 );
1998                 put_item_in_cache($parent_item, true);
1999                 update_thread($parent_item['id']);
2000         }
2001
2002         return;
2003 }
2004
2005
2006
2007
2008 function diaspora_like($importer,$xml,$msg) {
2009
2010         $a = get_app();
2011         $guid = notags(unxmlify($xml->guid));
2012         $parent_guid = notags(unxmlify($xml->parent_guid));
2013         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
2014         $target_type = notags(unxmlify($xml->target_type));
2015         $positive = notags(unxmlify($xml->positive));
2016         $author_signature = notags(unxmlify($xml->author_signature));
2017
2018         $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
2019
2020         // likes on comments not supported here and likes on photos not supported by Diaspora
2021
2022 //      if($target_type !== 'Post')
2023 //              return;
2024
2025         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
2026         if(! $contact) {
2027                 logger('diaspora_like: cannot find contact: ' . $msg['author']);
2028                 return;
2029         }
2030
2031         if(! diaspora_post_allow($importer,$contact, false)) {
2032                 logger('diaspora_like: Ignoring this author.');
2033                 return 202;
2034         }
2035
2036         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
2037                 intval($importer['uid']),
2038                 dbesc($parent_guid)
2039         );
2040
2041         if(!count($r)) {
2042                 $result = diaspora_store_by_guid($parent_guid, $contact['url'], $importer['uid']);
2043
2044                 if (!$result) {
2045                         $person = find_diaspora_person_by_handle($diaspora_handle);
2046                         $result = diaspora_store_by_guid($parent_guid, $person['url'], $importer['uid']);
2047                 }
2048
2049                 if ($result) {
2050                         logger("Fetched missing item ".$parent_guid." - result: ".$result, LOGGER_DEBUG);
2051
2052                         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
2053                                 intval($importer['uid']),
2054                                 dbesc($parent_guid)
2055                         );
2056                 }
2057         }
2058
2059         if(! count($r)) {
2060                 logger('diaspora_like: parent item not found: ' . $guid);
2061                 return;
2062         }
2063
2064         $parent_item = $r[0];
2065
2066         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
2067                 intval($importer['uid']),
2068                 dbesc($guid)
2069         );
2070         if(count($r)) {
2071                 if($positive === 'true') {
2072                         logger('diaspora_like: duplicate like: ' . $guid);
2073                         return;
2074                 }
2075                 // Note: I don't think "Like" objects with positive = "false" are ever actually used
2076                 // It looks like "RelayableRetractions" are used for "unlike" instead
2077                 if($positive === 'false') {
2078                         logger('diaspora_like: received a like with positive set to "false"...ignoring');
2079 /*                      q("UPDATE `item` SET `deleted` = 1 WHERE `id` = %d AND `uid` = %d",
2080                                 intval($r[0]['id']),
2081                                 intval($importer['uid'])
2082                         );*/
2083                         // FIXME--actually don't unless it turns out that Diaspora does indeed send out "false" likes
2084                         //  send notification via proc_run()
2085                         return;
2086                 }
2087         }
2088         // Note: I don't think "Like" objects with positive = "false" are ever actually used
2089         // It looks like "RelayableRetractions" are used for "unlike" instead
2090         if($positive === 'false') {
2091                 logger('diaspora_like: received a like with positive set to "false"');
2092                 logger('diaspora_like: unlike received with no corresponding like...ignoring');
2093                 return;
2094         }
2095
2096
2097         /* How Diaspora performs "like" signature checking:
2098
2099            - If an item has been sent by the like author to the top-level post owner to relay on
2100              to the rest of the contacts on the top-level post, the top-level post owner should check
2101              the author_signature, then create a parent_author_signature before relaying the like on
2102            - If an item has been relayed on by the top-level post owner, the contacts who receive it
2103              check only the parent_author_signature. Basically, they trust that the top-level post
2104              owner has already verified the authenticity of anything he/she sends out
2105            - In either case, the signature that get checked is the signature created by the person
2106              who sent the salmon
2107         */
2108
2109         // Diaspora has changed the way they are signing the likes.
2110         // Just to make sure that we don't miss any likes we will check the old and the current way.
2111         $old_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
2112
2113         $signed_data = $positive . ';' . $guid . ';' . $target_type . ';' . $parent_guid . ';' . $diaspora_handle;
2114
2115         $key = $msg['key'];
2116
2117         if ($parent_author_signature) {
2118                 // If a parent_author_signature exists, then we've received the like
2119                 // relayed from the top-level post owner. There's no need to check the
2120                 // author_signature if the parent_author_signature is valid
2121
2122                 $parent_author_signature = base64_decode($parent_author_signature);
2123
2124                 if (!rsa_verify($signed_data,$parent_author_signature,$key,'sha256') AND
2125                         !rsa_verify($old_signed_data,$parent_author_signature,$key,'sha256')) {
2126
2127                         logger('diaspora_like: top-level owner verification failed.');
2128                         return;
2129                 }
2130         } else {
2131                 // If there's no parent_author_signature, then we've received the like
2132                 // from the like creator. In that case, the person is "like"ing
2133                 // our post, so he/she must be a contact of ours and his/her public key
2134                 // should be in $msg['key']
2135
2136                 $author_signature = base64_decode($author_signature);
2137
2138                 if (!rsa_verify($signed_data,$author_signature,$key,'sha256') AND
2139                         !rsa_verify($old_signed_data,$author_signature,$key,'sha256')) {
2140
2141                         logger('diaspora_like: like creator verification failed.');
2142                         return;
2143                 }
2144         }
2145
2146         // Phew! Everything checks out. Now create an item.
2147
2148         // Find the original comment author information.
2149         // We need this to make sure we display the comment author
2150         // information (name and avatar) correctly.
2151         if(strcasecmp($diaspora_handle,$msg['author']) == 0)
2152                 $person = $contact;
2153         else {
2154                 $person = find_diaspora_person_by_handle($diaspora_handle);
2155
2156                 if(! is_array($person)) {
2157                         logger('diaspora_like: unable to find author details');
2158                         return;
2159                 }
2160         }
2161
2162         $uri = $diaspora_handle . ':' . $guid;
2163
2164         $activity = ACTIVITY_LIKE;
2165         $post_type = (($parent_item['resource-id']) ? t('photo') : t('status'));
2166         $objtype = (($parent_item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
2167         $link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . '" />' . "\n") ;
2168         $body = $parent_item['body'];
2169
2170         $obj = <<< EOT
2171
2172         <object>
2173                 <type>$objtype</type>
2174                 <local>1</local>
2175                 <id>{$parent_item['uri']}</id>
2176                 <link>$link</link>
2177                 <title></title>
2178                 <content>$body</content>
2179         </object>
2180 EOT;
2181         $bodyverb = t('%1$s likes %2$s\'s %3$s');
2182
2183         // Fetch the contact id - if we know this contact
2184         $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
2185                 dbesc(normalise_link($person['url'])), intval($importer['uid']));
2186         if ($r) {
2187                 $cid = $r[0]['id'];
2188                 $network = $r[0]['network'];
2189         } else {
2190                 $cid = $contact['id'];
2191                 $network = NETWORK_DIASPORA;
2192         }
2193
2194         $arr = array();
2195
2196         $arr['uri'] = $uri;
2197         $arr['uid'] = $importer['uid'];
2198         $arr['guid'] = $guid;
2199         $arr['network']  = $network;
2200         $arr['contact-id'] = $cid;
2201         $arr['type'] = 'activity';
2202         $arr['wall'] = $parent_item['wall'];
2203         $arr['gravity'] = GRAVITY_LIKE;
2204         $arr['parent'] = $parent_item['id'];
2205         $arr['parent-uri'] = $parent_item['uri'];
2206
2207         $arr['owner-name'] = $parent_item['name'];
2208         $arr['owner-link'] = $parent_item['url'];
2209         //$arr['owner-avatar'] = $parent_item['thumb'];
2210         $arr['owner-avatar'] = ((x($parent_item,'thumb')) ? $parent_item['thumb'] : $parent_item['photo']);
2211
2212         $arr['author-name'] = $person['name'];
2213         $arr['author-link'] = $person['url'];
2214         $arr['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
2215
2216         $ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
2217         $alink = '[url=' . $parent_item['author-link'] . ']' . $parent_item['author-name'] . '[/url]';
2218         //$plink = '[url=' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . ']' . $post_type . '[/url]';
2219         $plink = '[url='.$a->get_baseurl().'/display/'.urlencode($guid).']'.$post_type.'[/url]';
2220         $arr['body'] =  sprintf( $bodyverb, $ulink, $alink, $plink );
2221
2222         $arr['app']  = 'Diaspora';
2223
2224         $arr['private'] = $parent_item['private'];
2225         $arr['verb'] = $activity;
2226         $arr['object-type'] = $objtype;
2227         $arr['object'] = $obj;
2228         $arr['visible'] = 1;
2229         $arr['unseen'] = 1;
2230         $arr['last-child'] = 0;
2231
2232         $message_id = item_store($arr);
2233
2234
2235         //if($message_id) {
2236         //      q("update item set plink = '%s' where id = %d",
2237         //              //dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
2238         //              dbesc($a->get_baseurl().'/display/'.$guid),
2239         //              intval($message_id)
2240         //      );
2241         //}
2242
2243         // If we are the origin of the parent we store the original signature and notify our followers
2244         if($parent_item['origin']) {
2245                 $author_signature_base64 = base64_encode($author_signature);
2246                 $author_signature_base64 = diaspora_repair_signature($author_signature_base64, $diaspora_handle);
2247
2248                 q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
2249                         intval($message_id),
2250                         dbesc($signed_data),
2251                         dbesc($author_signature_base64),
2252                         dbesc($diaspora_handle)
2253                 );
2254
2255                 // notify others
2256                 proc_run('php','include/notifier.php','comment-import',$message_id);
2257         }
2258
2259         return;
2260 }
2261
2262 function diaspora_retraction($importer,$xml) {
2263
2264
2265         $guid = notags(unxmlify($xml->guid));
2266         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
2267         $type = notags(unxmlify($xml->type));
2268
2269         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
2270         if(! $contact)
2271                 return;
2272
2273         if($type === 'Person') {
2274                 require_once('include/Contact.php');
2275                 contact_remove($contact['id']);
2276         } elseif($type === 'StatusMessage') {
2277                 $guid = notags(unxmlify($xml->post_guid));
2278
2279                 $r = q("SELECT * FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1",
2280                         dbesc($guid),
2281                         intval($importer['uid'])
2282                 );
2283                 if(count($r)) {
2284                         if(link_compare($r[0]['author-link'],$contact['url'])) {
2285                                 q("UPDATE `item` SET `deleted` = 1, `changed` = '%s' WHERE `id` = %d",
2286                                         dbesc(datetime_convert()),
2287                                         intval($r[0]['id'])
2288                                 );
2289                                 delete_thread($r[0]['id'], $r[0]['parent-uri']);
2290                         }
2291                 }
2292         } elseif($type === 'Post') {
2293                 $r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
2294                         dbesc('guid'),
2295                         intval($importer['uid'])
2296                 );
2297                 if(count($r)) {
2298                         if(link_compare($r[0]['author-link'],$contact['url'])) {
2299                                 q("update item set `deleted` = 1, `changed` = '%s' where `id` = %d",
2300                                         dbesc(datetime_convert()),
2301                                         intval($r[0]['id'])
2302                                 );
2303                                 delete_thread($r[0]['id'], $r[0]['parent-uri']);
2304                         }
2305                 }
2306         }
2307
2308         return 202;
2309         // NOTREACHED
2310 }
2311
2312 function diaspora_signed_retraction($importer,$xml,$msg) {
2313
2314
2315         $guid = notags(unxmlify($xml->target_guid));
2316         $diaspora_handle = notags(unxmlify($xml->sender_handle));
2317         $type = notags(unxmlify($xml->target_type));
2318         $sig = notags(unxmlify($xml->target_author_signature));
2319
2320         $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
2321
2322         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
2323         if(! $contact) {
2324                 logger('diaspora_signed_retraction: no contact ' . $diaspora_handle . ' for ' . $importer['uid']);
2325                 return;
2326         }
2327
2328
2329         $signed_data = $guid . ';' . $type ;
2330         $key = $msg['key'];
2331
2332         /* How Diaspora performs relayable_retraction signature checking:
2333
2334            - If an item has been sent by the item author to the top-level post owner to relay on
2335              to the rest of the contacts on the top-level post, the top-level post owner checks
2336              the author_signature, then creates a parent_author_signature before relaying the item on
2337            - If an item has been relayed on by the top-level post owner, the contacts who receive it
2338              check only the parent_author_signature. Basically, they trust that the top-level post
2339              owner has already verified the authenticity of anything he/she sends out
2340            - In either case, the signature that get checked is the signature created by the person
2341              who sent the salmon
2342         */
2343
2344         if($parent_author_signature) {
2345
2346                 $parent_author_signature = base64_decode($parent_author_signature);
2347
2348                 if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
2349                         logger('diaspora_signed_retraction: top-level post owner verification failed');
2350                         return;
2351                 }
2352
2353         } else {
2354
2355                 $sig_decode = base64_decode($sig);
2356
2357                 if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
2358                         logger('diaspora_signed_retraction: retraction owner verification failed.' . print_r($msg,true));
2359                         return;
2360                 }
2361         }
2362
2363         if($type === 'StatusMessage' || $type === 'Comment' || $type === 'Like') {
2364                 $r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
2365                         dbesc($guid),
2366                         intval($importer['uid'])
2367                 );
2368                 if(count($r)) {
2369                         if(link_compare($r[0]['author-link'],$contact['url'])) {
2370                                 q("update item set `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' where `id` = %d",
2371                                         dbesc(datetime_convert()),
2372                                         dbesc(datetime_convert()),
2373                                         intval($r[0]['id'])
2374                                 );
2375                                 delete_thread($r[0]['id'], $r[0]['parent-uri']);
2376
2377                                 // Now check if the retraction needs to be relayed by us
2378                                 //
2379                                 // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
2380                                 // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
2381                                 // The only item with `parent` and `id` as the parent id is the parent item.
2382                                 $p = q("SELECT `origin` FROM `item` WHERE `parent` = %d AND `id` = %d LIMIT 1",
2383                                         intval($r[0]['parent']),
2384                                         intval($r[0]['parent'])
2385                                 );
2386                                 if(count($p)) {
2387                                         if($p[0]['origin']) {
2388                                                 q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
2389                                                         $r[0]['id'],
2390                                                         dbesc($signed_data),
2391                                                         dbesc($sig),
2392                                                         dbesc($diaspora_handle)
2393                                                 );
2394
2395                                                 // the existence of parent_author_signature would have meant the parent_author or owner
2396                                                 // is already relaying.
2397                                                 logger('diaspora_signed_retraction: relaying relayable_retraction');
2398
2399                                                 proc_run('php','include/notifier.php','drop',$r[0]['id']);
2400                                         }
2401                                 }
2402                         }
2403                 }
2404         }
2405         else
2406                 logger('diaspora_signed_retraction: unknown type: ' . $type);
2407
2408         return 202;
2409         // NOTREACHED
2410 }
2411
2412 function diaspora_profile($importer,$xml,$msg) {
2413
2414         $a = get_app();
2415         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
2416
2417
2418         if($diaspora_handle != $msg['author']) {
2419                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
2420                 return 202;
2421         }
2422
2423         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
2424         if(! $contact)
2425                 return;
2426
2427         //if($contact['blocked']) {
2428         //      logger('diaspora_post: Ignoring this author.');
2429         //      return 202;
2430         //}
2431
2432         $name = unxmlify($xml->first_name) . ((strlen($xml->last_name)) ? ' ' . unxmlify($xml->last_name) : '');
2433         $image_url = unxmlify($xml->image_url);
2434         $birthday = unxmlify($xml->birthday);
2435         $location = diaspora2bb(unxmlify($xml->location));
2436         $about = diaspora2bb(unxmlify($xml->bio));
2437         $gender = unxmlify($xml->gender);
2438         $searchable = (unxmlify($xml->searchable) == "true");
2439         $nsfw = (unxmlify($xml->nsfw) == "true");
2440         $tags = unxmlify($xml->tag_string);
2441
2442         $tags = explode("#", $tags);
2443
2444         $keywords = array();
2445         foreach ($tags as $tag) {
2446                 $tag = trim(strtolower($tag));
2447                 if ($tag != "")
2448                         $keywords[] = $tag;
2449         }
2450
2451         $keywords = implode(", ", $keywords);
2452
2453         $handle_parts = explode("@", $diaspora_handle);
2454         $nick = $handle_parts[0];
2455
2456         if($name === '') {
2457                 $name = $handle_parts[0];
2458         }
2459
2460         if( preg_match("|^https?://|", $image_url) === 0) {
2461                 $image_url = "http://" . $handle_parts[1] . $image_url;
2462         }
2463
2464 /*      $r = q("SELECT DISTINCT ( `resource-id` ) FROM `photo` WHERE  `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' ",
2465                 intval($importer['uid']),
2466                 intval($contact['id'])
2467         );
2468         $oldphotos = ((count($r)) ? $r : null);*/
2469
2470         require_once('include/Photo.php');
2471
2472         $images = import_profile_photo($image_url,$importer['uid'],$contact['id']);
2473
2474         // Generic birthday. We don't know the timezone. The year is irrelevant.
2475
2476         $birthday = str_replace('1000','1901',$birthday);
2477
2478         if ($birthday != "")
2479                 $birthday = datetime_convert('UTC','UTC',$birthday,'Y-m-d');
2480
2481         // this is to prevent multiple birthday notifications in a single year
2482         // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
2483
2484         if(substr($birthday,5) === substr($contact['bd'],5))
2485                 $birthday = $contact['bd'];
2486
2487         /// @TODO Update name on item['author-name'] if the name changed. See consume_feed()
2488         /// (Not doing this currently because D* protocol is scheduled for revision soon).
2489
2490         $r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `photo` = '%s', `thumb` = '%s', `micro` = '%s', `avatar-date` = '%s' , `bd` = '%s', `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
2491                 dbesc($name),
2492                 dbesc($nick),
2493                 dbesc($diaspora_handle),
2494                 dbesc(datetime_convert()),
2495                 dbesc($image_url),
2496                 dbesc($images[1]),
2497                 dbesc($images[2]),
2498                 dbesc(datetime_convert()),
2499                 dbesc($birthday),
2500                 dbesc($location),
2501                 dbesc($about),
2502                 dbesc($keywords),
2503                 dbesc($gender),
2504                 intval($contact['id']),
2505                 intval($importer['uid'])
2506         );
2507
2508         if ($searchable) {
2509                 require_once('include/socgraph.php');
2510                 poco_check($contact['url'], $name, NETWORK_DIASPORA, $image_url, $about, $location, $gender, $keywords, "",
2511                         datetime_convert(), 2, $contact['id'], $importer['uid']);
2512         }
2513
2514         update_gcontact(array("url" => $contact['url'], "network" => NETWORK_DIASPORA, "generation" => 2,
2515                                 "photo" => $image_url, "name" => $name, "location" => $location,
2516                                 "about" => $about, "birthday" => $birthday, "gender" => $gender,
2517                                 "addr" => $diaspora_handle, "nick" => $nick, "keywords" => $keywords,
2518                                 "hide" => !$searchable, "nsfw" => $nsfw));
2519
2520 /*      if($r) {
2521                 if($oldphotos) {
2522                         foreach($oldphotos as $ph) {
2523                                 q("DELETE FROM `photo` WHERE `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' AND `resource-id` = '%s' ",
2524                                         intval($importer['uid']),
2525                                         intval($contact['id']),
2526                                         dbesc($ph['resource-id'])
2527                                 );
2528                         }
2529                 }
2530         }       */
2531
2532         return;
2533
2534 }
2535
2536 function diaspora_share($me,$contact) {
2537         $a = get_app();
2538         $myaddr = $me['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2539         $theiraddr = $contact['addr'];
2540
2541         $tpl = get_markup_template('diaspora_share.tpl');
2542         $msg = replace_macros($tpl, array(
2543                 '$sender' => $myaddr,
2544                 '$recipient' => $theiraddr
2545         ));
2546
2547         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
2548         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey']));
2549
2550         return(diaspora_transmit($owner,$contact,$slap, false));
2551 }
2552
2553 function diaspora_unshare($me,$contact) {
2554
2555         $a = get_app();
2556         $myaddr = $me['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2557
2558         $tpl = get_markup_template('diaspora_retract.tpl');
2559         $msg = replace_macros($tpl, array(
2560                 '$guid'   => $me['guid'],
2561                 '$type'   => 'Person',
2562                 '$handle' => $myaddr
2563         ));
2564
2565         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
2566         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey']));
2567
2568         return(diaspora_transmit($owner,$contact,$slap, false));
2569
2570 }
2571
2572
2573 function diaspora_send_status($item,$owner,$contact,$public_batch = false) {
2574
2575         $a = get_app();
2576         $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2577         $theiraddr = $contact['addr'];
2578
2579         $images = array();
2580
2581         $title = $item['title'];
2582         $body = $item['body'];
2583
2584 /*
2585         // We're trying to match Diaspora's split message/photo protocol but
2586         // all the photos are displayed on D* as links and not img's - even
2587         // though we're sending pretty much precisely what they send us when
2588         // doing the same operation.
2589         // Commented out for now, we'll use bb2diaspora to convert photos to markdown
2590         // which seems to get through intact.
2591
2592         $cnt = preg_match_all('|\[img\](.*?)\[\/img\]|',$body,$matches,PREG_SET_ORDER);
2593         if($cnt) {
2594                 foreach($matches as $mtch) {
2595                         $detail = array();
2596                         $detail['str'] = $mtch[0];
2597                         $detail['path'] = dirname($mtch[1]) . '/';
2598                         $detail['file'] = basename($mtch[1]);
2599                         $detail['guid'] = $item['guid'];
2600                         $detail['handle'] = $myaddr;
2601                         $images[] = $detail;
2602                         $body = str_replace($detail['str'],$mtch[1],$body);
2603                 }
2604         }
2605 */
2606
2607         //if(strlen($title))
2608         //      $body = "[b]".html_entity_decode($title)."[/b]\n\n".$body;
2609
2610         // convert to markdown
2611         $body = xmlify(html_entity_decode(bb2diaspora($body)));
2612         //$body = bb2diaspora($body);
2613
2614         // Adding the title
2615         if(strlen($title))
2616                 $body = "## ".html_entity_decode($title)."\n\n".$body;
2617
2618         if($item['attach']) {
2619                 $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism',$item['attach'],$matches,PREG_SET_ORDER);
2620                 if(cnt) {
2621                         $body .= "\n" . t('Attachments:') . "\n";
2622                         foreach($matches as $mtch) {
2623                                 $body .= '[' . $mtch[3] . '](' . $mtch[1] . ')' . "\n";
2624                         }
2625                 }
2626         }
2627
2628
2629         $public = (($item['private']) ? 'false' : 'true');
2630
2631         require_once('include/datetime.php');
2632         $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
2633
2634         // Detect a share element and do a reshare
2635         // see: https://github.com/Raven24/diaspora-federation/blob/master/lib/diaspora-federation/entities/reshare.rb
2636         if (!$item['private'] AND ($ret = diaspora_is_reshare($item["body"]))) {
2637                 $tpl = get_markup_template('diaspora_reshare.tpl');
2638                 $msg = replace_macros($tpl, array(
2639                         '$root_handle' => xmlify($ret['root_handle']),
2640                         '$root_guid' => $ret['root_guid'],
2641                         '$guid' => $item['guid'],
2642                         '$handle' => xmlify($myaddr),
2643                         '$public' => $public,
2644                         '$created' => $created,
2645                         '$provider' => $item["app"]
2646                 ));
2647         } else {
2648                 $tpl = get_markup_template('diaspora_post.tpl');
2649                 $msg = replace_macros($tpl, array(
2650                         '$body' => $body,
2651                         '$guid' => $item['guid'],
2652                         '$handle' => xmlify($myaddr),
2653                         '$public' => $public,
2654                         '$created' => $created,
2655                         '$provider' => $item["app"]
2656                 ));
2657         }
2658
2659         logger('diaspora_send_status: '.$owner['username'].' -> '.$contact['name'].' base message: '.$msg, LOGGER_DATA);
2660         logger('send guid '.$item['guid'], LOGGER_DEBUG);
2661
2662         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2663         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2664
2665         $return_code = diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']);
2666
2667         logger('diaspora_send_status: guid: '.$item['guid'].' result '.$return_code, LOGGER_DEBUG);
2668
2669         if(count($images)) {
2670                 diaspora_send_images($item,$owner,$contact,$images,$public_batch);
2671         }
2672
2673         return $return_code;
2674 }
2675
2676 function diaspora_is_reshare($body) {
2677         $body = trim($body);
2678
2679         // Skip if it isn't a pure repeated messages
2680         // Does it start with a share?
2681         if (strpos($body, "[share") > 0)
2682                 return(false);
2683
2684         // Does it end with a share?
2685         if (strlen($body) > (strrpos($body, "[/share]") + 8))
2686                 return(false);
2687
2688         $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
2689         // Skip if there is no shared message in there
2690         if ($body == $attributes)
2691                 return(false);
2692
2693         $guid = "";
2694         preg_match("/guid='(.*?)'/ism", $attributes, $matches);
2695         if ($matches[1] != "")
2696                 $guid = $matches[1];
2697
2698         preg_match('/guid="(.*?)"/ism', $attributes, $matches);
2699         if ($matches[1] != "")
2700                 $guid = $matches[1];
2701
2702         if ($guid != "") {
2703                 $r = q("SELECT `contact-id` FROM `item` WHERE `guid` = '%s' AND `network` IN ('%s', '%s') LIMIT 1",
2704                         dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
2705                 if ($r) {
2706                         $ret= array();
2707                         $ret["root_handle"] = diaspora_handle_from_contact($r[0]["contact-id"]);
2708                         $ret["root_guid"] = $guid;
2709                         return($ret);
2710                 }
2711         }
2712
2713         $profile = "";
2714         preg_match("/profile='(.*?)'/ism", $attributes, $matches);
2715         if ($matches[1] != "")
2716                 $profile = $matches[1];
2717
2718         preg_match('/profile="(.*?)"/ism', $attributes, $matches);
2719         if ($matches[1] != "")
2720                 $profile = $matches[1];
2721
2722         $ret= array();
2723
2724         $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
2725         if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
2726                 return(false);
2727
2728         $link = "";
2729         preg_match("/link='(.*?)'/ism", $attributes, $matches);
2730         if ($matches[1] != "")
2731                 $link = $matches[1];
2732
2733         preg_match('/link="(.*?)"/ism', $attributes, $matches);
2734         if ($matches[1] != "")
2735                 $link = $matches[1];
2736
2737         $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
2738         if (($ret["root_guid"] == $link) OR ($ret["root_guid"] == ""))
2739                 return(false);
2740
2741         return($ret);
2742 }
2743
2744 function diaspora_send_images($item,$owner,$contact,$images,$public_batch = false) {
2745         $a = get_app();
2746         if(! count($images))
2747                 return;
2748         $mysite = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://') + 3) . '/photo';
2749
2750         $tpl = get_markup_template('diaspora_photo.tpl');
2751         foreach($images as $image) {
2752                 if(! stristr($image['path'],$mysite))
2753                         continue;
2754                 $resource = str_replace('.jpg','',$image['file']);
2755                 $resource = substr($resource,0,strpos($resource,'-'));
2756
2757                 $r = q("select * from photo where `resource-id` = '%s' and `uid` = %d limit 1",
2758                         dbesc($resource),
2759                         intval($owner['uid'])
2760                 );
2761                 if(! count($r))
2762                         continue;
2763                 $public = (($r[0]['allow_cid'] || $r[0]['allow_gid'] || $r[0]['deny_cid'] || $r[0]['deny_gid']) ? 'false' : 'true' );
2764                 $msg = replace_macros($tpl,array(
2765                         '$path' => xmlify($image['path']),
2766                         '$filename' => xmlify($image['file']),
2767                         '$msg_guid' => xmlify($image['guid']),
2768                         '$guid' => xmlify($r[0]['guid']),
2769                         '$handle' => xmlify($image['handle']),
2770                         '$public' => xmlify($public),
2771                         '$created_at' => xmlify(datetime_convert('UTC','UTC',$r[0]['created'],'Y-m-d H:i:s \U\T\C'))
2772                 ));
2773
2774
2775                 logger('diaspora_send_photo: base message: ' . $msg, LOGGER_DATA);
2776                 logger('send guid '.$r[0]['guid'], LOGGER_DEBUG);
2777
2778                 $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2779                 //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2780
2781                 diaspora_transmit($owner,$contact,$slap,$public_batch,false,$r[0]['guid']);
2782         }
2783
2784 }
2785
2786 function diaspora_send_followup($item,$owner,$contact,$public_batch = false) {
2787
2788         $a = get_app();
2789         $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2790 //      $theiraddr = $contact['addr'];
2791
2792         // Diaspora doesn't support threaded comments, but some
2793         // versions of Diaspora (i.e. Diaspora-pistos) support
2794         // likes on comments
2795         if($item['verb'] === ACTIVITY_LIKE && $item['thr-parent']) {
2796                 $p = q("select guid, type, uri, `parent-uri` from item where uri = '%s' limit 1",
2797                         dbesc($item['thr-parent'])
2798                       );
2799         }
2800         else {
2801                 // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
2802                 // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
2803                 // The only item with `parent` and `id` as the parent id is the parent item.
2804                 $p = q("select guid, type, uri, `parent-uri` from item where parent = %d and id = %d limit 1",
2805                         intval($item['parent']),
2806                         intval($item['parent'])
2807                 );
2808         }
2809         if(count($p))
2810                 $parent = $p[0];
2811         else
2812                 return;
2813
2814         if($item['verb'] === ACTIVITY_LIKE) {
2815                 $tpl = get_markup_template('diaspora_like.tpl');
2816                 $like = true;
2817                 $target_type = ( $parent['uri'] === $parent['parent-uri']  ? 'Post' : 'Comment');
2818 //              $target_type = (strpos($parent['type'], 'comment') ? 'Comment' : 'Post');
2819 //              $positive = (($item['deleted']) ? 'false' : 'true');
2820                 $positive = 'true';
2821
2822                 if(($item['deleted']))
2823                         logger('diaspora_send_followup: received deleted "like". Those should go to diaspora_send_retraction');
2824         }
2825         else {
2826                 $tpl = get_markup_template('diaspora_comment.tpl');
2827                 $like = false;
2828         }
2829
2830         $text = html_entity_decode(bb2diaspora($item['body']));
2831
2832         // sign it
2833
2834         if($like)
2835                 $signed_text = $item['guid'] . ';' . $target_type . ';' . $parent['guid'] . ';' . $positive . ';' . $myaddr;
2836         else
2837                 $signed_text = $item['guid'] . ';' . $parent['guid'] . ';' . $text . ';' . $myaddr;
2838
2839         $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
2840
2841         $msg = replace_macros($tpl,array(
2842                 '$guid' => xmlify($item['guid']),
2843                 '$parent_guid' => xmlify($parent['guid']),
2844                 '$target_type' =>xmlify($target_type),
2845                 '$authorsig' => xmlify($authorsig),
2846                 '$body' => xmlify($text),
2847                 '$positive' => xmlify($positive),
2848                 '$handle' => xmlify($myaddr)
2849         ));
2850
2851         logger('diaspora_followup: base message: ' . $msg, LOGGER_DATA);
2852         logger('send guid '.$item['guid'], LOGGER_DEBUG);
2853
2854         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2855         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2856
2857         return(diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']));
2858 }
2859
2860
2861 function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
2862
2863
2864         $a = get_app();
2865         $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2866 //      $theiraddr = $contact['addr'];
2867
2868         // Diaspora doesn't support threaded comments, but some
2869         // versions of Diaspora (i.e. Diaspora-pistos) support
2870         // likes on comments
2871         if($item['verb'] === ACTIVITY_LIKE && $item['thr-parent']) {
2872                 $p = q("select guid, type, uri, `parent-uri` from item where uri = '%s' limit 1",
2873                         dbesc($item['thr-parent'])
2874                       );
2875         }
2876         else {
2877                 // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
2878                 // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
2879                 // The only item with `parent` and `id` as the parent id is the parent item.
2880                 $p = q("select guid, type, uri, `parent-uri` from item where parent = %d and id = %d limit 1",
2881                        intval($item['parent']),
2882                        intval($item['parent'])
2883                       );
2884         }
2885         if(count($p))
2886                 $parent = $p[0];
2887         else
2888                 return;
2889
2890         $like = false;
2891         $relay_retract = false;
2892         $sql_sign_id = 'iid';
2893         if( $item['deleted']) {
2894                 $relay_retract = true;
2895
2896                 $target_type = ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
2897
2898                 $sql_sign_id = 'retract_iid';
2899                 $tpl = get_markup_template('diaspora_relayable_retraction.tpl');
2900         }
2901         elseif($item['verb'] === ACTIVITY_LIKE) {
2902                 $like = true;
2903
2904                 $target_type = ( $parent['uri'] === $parent['parent-uri']  ? 'Post' : 'Comment');
2905 //              $positive = (($item['deleted']) ? 'false' : 'true');
2906                 $positive = 'true';
2907
2908                 $tpl = get_markup_template('diaspora_like_relay.tpl');
2909         }
2910         else { // item is a comment
2911                 $tpl = get_markup_template('diaspora_comment_relay.tpl');
2912         }
2913
2914
2915         // fetch the original signature if the relayable was created by a Diaspora
2916         // or DFRN user. Relayables for other networks are not supported.
2917
2918         $r = q("SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE " . $sql_sign_id . " = %d LIMIT 1",
2919                 intval($item['id'])
2920         );
2921         if(count($r)) {
2922                 $orig_sign = $r[0];
2923                 $signed_text = $orig_sign['signed_text'];
2924                 $authorsig = $orig_sign['signature'];
2925                 $handle = $orig_sign['signer'];
2926
2927                 // Split the signed text
2928                 $signed_parts = explode(";", $signed_text);
2929
2930                 // Remove the parent guid
2931                 array_shift($signed_parts);
2932
2933                 // Remove the comment guid
2934                 array_shift($signed_parts);
2935
2936                 // Remove the handle
2937                 array_pop($signed_parts);
2938
2939                 // Glue the parts together
2940                 $text = implode(";", $signed_parts);
2941         }
2942         else {
2943                 // This part is meant for cases where we don't have the signatur. (Which shouldn't happen with posts from Diaspora and Friendica)
2944                 // This means that the comment won't be accepted by newer Diaspora servers
2945
2946                 $body = $item['body'];
2947                 $text = html_entity_decode(bb2diaspora($body));
2948
2949                 $handle = diaspora_handle_from_contact($item['contact-id']);
2950                 if(! $handle)
2951                         return;
2952
2953                 if($relay_retract)
2954                         $signed_text = $item['guid'] . ';' . $target_type;
2955                 elseif($like)
2956                         $signed_text = $item['guid'] . ';' . $target_type . ';' . $parent['guid'] . ';' . $positive . ';' . $handle;
2957                 else
2958                         $signed_text = $item['guid'] . ';' . $parent['guid'] . ';' . $text . ';' . $handle;
2959
2960                 $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
2961         }
2962
2963         // Sign the relayable with the top-level owner's signature
2964         $parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
2965
2966         $msg = replace_macros($tpl,array(
2967                 '$guid' => xmlify($item['guid']),
2968                 '$parent_guid' => xmlify($parent['guid']),
2969                 '$target_type' =>xmlify($target_type),
2970                 '$authorsig' => xmlify($authorsig),
2971                 '$parentsig' => xmlify($parentauthorsig),
2972                 '$body' => xmlify($text),
2973                 '$positive' => xmlify($positive),
2974                 '$handle' => xmlify($handle)
2975         ));
2976
2977         logger('diaspora_send_relay: base message: ' . $msg, LOGGER_DEBUG);
2978         logger('send guid '.$item['guid'], LOGGER_DEBUG);
2979
2980         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2981         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2982
2983         return(diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']));
2984
2985 }
2986
2987
2988
2989 function diaspora_send_retraction($item,$owner,$contact,$public_batch = false) {
2990
2991         $a = get_app();
2992         $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2993
2994         // Check whether the retraction is for a top-level post or whether it's a relayable
2995         if( $item['uri'] !== $item['parent-uri'] ) {
2996
2997                 $tpl = get_markup_template('diaspora_relay_retraction.tpl');
2998                 $target_type = (($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
2999         }
3000         else {
3001
3002                 $tpl = get_markup_template('diaspora_signed_retract.tpl');
3003                 $target_type = 'StatusMessage';
3004         }
3005
3006         $signed_text = $item['guid'] . ';' . $target_type;
3007
3008         $msg = replace_macros($tpl, array(
3009                 '$guid'   => xmlify($item['guid']),
3010                 '$type'   => xmlify($target_type),
3011                 '$handle' => xmlify($myaddr),
3012                 '$signature' => xmlify(base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')))
3013         ));
3014
3015         logger('send guid '.$item['guid'], LOGGER_DEBUG);
3016
3017         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
3018         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
3019
3020         return(diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']));
3021 }
3022
3023 function diaspora_send_mail($item,$owner,$contact) {
3024
3025         $a = get_app();
3026         $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
3027
3028         $r = q("select * from conv where id = %d and uid = %d limit 1",
3029                 intval($item['convid']),
3030                 intval($item['uid'])
3031         );
3032
3033         if(! count($r)) {
3034                 logger('diaspora_send_mail: conversation not found.');
3035                 return;
3036         }
3037         $cnv = $r[0];
3038
3039         $conv = array(
3040                 'guid' => xmlify($cnv['guid']),
3041                 'subject' => xmlify($cnv['subject']),
3042                 'created_at' => xmlify(datetime_convert('UTC','UTC',$cnv['created'],'Y-m-d H:i:s \U\T\C')),
3043                 'diaspora_handle' => xmlify($cnv['creator']),
3044                 'participant_handles' => xmlify($cnv['recips'])
3045         );
3046
3047         $body = bb2diaspora($item['body']);
3048         $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
3049
3050         $signed_text =  $item['guid'] . ';' . $cnv['guid'] . ';' . $body .  ';'
3051                 . $created . ';' . $myaddr . ';' . $cnv['guid'];
3052
3053         $sig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
3054
3055         $msg = array(
3056                 'guid' => xmlify($item['guid']),
3057                 'parent_guid' => xmlify($cnv['guid']),
3058                 'parent_author_signature' => xmlify($sig),
3059                 'author_signature' => xmlify($sig),
3060                 'text' => xmlify($body),
3061                 'created_at' => xmlify($created),
3062                 'diaspora_handle' => xmlify($myaddr),
3063                 'conversation_guid' => xmlify($cnv['guid'])
3064         );
3065
3066         if($item['reply']) {
3067                 $tpl = get_markup_template('diaspora_message.tpl');
3068                 $xmsg = replace_macros($tpl, array('$msg' => $msg));
3069         }
3070         else {
3071                 $conv['messages'] = array($msg);
3072                 $tpl = get_markup_template('diaspora_conversation.tpl');
3073                 $xmsg = replace_macros($tpl, array('$conv' => $conv));
3074         }
3075
3076         logger('diaspora_conversation: ' . print_r($xmsg,true), LOGGER_DATA);
3077         logger('send guid '.$item['guid'], LOGGER_DEBUG);
3078
3079         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],false)));
3080         //$slap = 'xml=' . urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],false));
3081
3082         return(diaspora_transmit($owner,$contact,$slap,false,false,$item['guid']));
3083
3084
3085 }
3086
3087 function diaspora_transmit($owner,$contact,$slap,$public_batch,$queue_run=false,$guid = "") {
3088
3089         $enabled = intval(get_config('system','diaspora_enabled'));
3090         if(! $enabled) {
3091                 return 200;
3092         }
3093
3094         $a = get_app();
3095         $logid = random_string(4);
3096         $dest_url = (($public_batch) ? $contact['batch'] : $contact['notify']);
3097         if(! $dest_url) {
3098                 logger('diaspora_transmit: no url for contact: ' . $contact['id'] . ' batch mode =' . $public_batch);
3099                 return 0;
3100         }
3101
3102         logger('diaspora_transmit: '.$logid.'-'.$guid.' '.$dest_url);
3103
3104         if( (! $queue_run) && (was_recently_delayed($contact['id'])) ) {
3105                 $return_code = 0;
3106         }
3107         else {
3108                 if (!intval(get_config('system','diaspora_test'))) {
3109                         post_url($dest_url . '/', $slap);
3110                         $return_code = $a->get_curl_code();
3111                 } else {
3112                         logger('diaspora_transmit: test_mode');
3113                         return 200;
3114                 }
3115         }
3116
3117         logger('diaspora_transmit: '.$logid.'-'.$guid.' returns: '.$return_code);
3118
3119         if((! $return_code) || (($return_code == 503) && (stristr($a->get_curl_headers(),'retry-after')))) {
3120                 logger('diaspora_transmit: queue message');
3121
3122                 $r = q("SELECT id from queue where cid = %d and network = '%s' and content = '%s' and batch = %d limit 1",
3123                         intval($contact['id']),
3124                         dbesc(NETWORK_DIASPORA),
3125                         dbesc($slap),
3126                         intval($public_batch)
3127                 );
3128                 if(count($r)) {
3129                         logger('diaspora_transmit: add_to_queue ignored - identical item already in queue');
3130                 }
3131                 else {
3132                         // queue message for redelivery
3133                         add_to_queue($contact['id'],NETWORK_DIASPORA,$slap,$public_batch);
3134                 }
3135         }
3136
3137
3138         return(($return_code) ? $return_code : (-1));
3139 }
3140
3141 function diaspora_fetch_relay() {
3142
3143         $serverdata = get_config("system", "relay_server");
3144         if ($serverdata == "")
3145                 return array();
3146
3147         $relay = array();
3148
3149         $servers = explode(",", $serverdata);
3150
3151         foreach($servers AS $server) {
3152                 $server = trim($server);
3153                 $batch = $server."/receive/public";
3154
3155                 $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
3156
3157                 if (!$relais) {
3158                         $addr = "relay@".str_replace("http://", "", normalise_link($server));
3159
3160                         $r = q("INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`)
3161                                 VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')",
3162                                 datetime_convert(),
3163                                 dbesc($addr),
3164                                 dbesc($addr),
3165                                 dbesc($server),
3166                                 dbesc(normalise_link($server)),
3167                                 dbesc($batch),
3168                                 dbesc(NETWORK_DIASPORA),
3169                                 intval(CONTACT_IS_FOLLOWER),
3170                                 dbesc(datetime_convert()),
3171                                 dbesc(datetime_convert()),
3172                                 dbesc(datetime_convert())
3173                         );
3174
3175                         $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
3176                         if ($relais)
3177                                 $relay[] = $relais[0];
3178                 } else
3179                         $relay[] = $relais[0];
3180         }
3181
3182         return $relay;
3183 }