include/diaspora.php

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