include/diaspora.php

   1 <?php
   2
   3 require_once('include/crypto.php');
   4 require_once('include/items.php');
   5 require_once('include/bb2diaspora.php');
   6 require_once('include/contact_selectors.php');
   7 require_once('include/queue_fn.php');
   8 require_once('include/lock.php');
   9
  10 function diaspora_dispatch_public($msg) {
  11
  12         $enabled = intval(get_config('system','diaspora_enabled'));
  13         if(! $enabled) {
  14                 logger('mod-diaspora: disabled');
  15                 return;
  16         }
  17
  18         $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
  19                 ( SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s' )
  20                 AND `account_expired` = 0 AND `account_removed` = 0 ",
  21                 dbesc(NETWORK_DIASPORA),
  22                 dbesc($msg['author'])
  23         );
  24         if(count($r)) {
  25                 foreach($r as $rr) {
  26                         logger('diaspora_public: delivering to: ' . $rr['username']);
  27                         diaspora_dispatch($rr,$msg);
  28                 }
  29         }
  30         else
  31                 logger('diaspora_public: no subscribers');
  32 }
  33
  34
  35
  36 function diaspora_dispatch($importer,$msg,$attempt=1) {
  37
  38         $ret = 0;
  39
  40         $enabled = intval(get_config('system','diaspora_enabled'));
  41         if(! $enabled) {
  42                 logger('mod-diaspora: disabled');
  43                 return;
  44         }
  45
  46         // php doesn't like dashes in variable names
  47
  48         $msg['message'] = str_replace(
  49                         array('<activity_streams-photo>','</activity_streams-photo>'),
  50                         array('<asphoto>','</asphoto>'),
  51                         $msg['message']);
  52
  53
  54         $parsed_xml = parse_xml_string($msg['message'],false);
  55
  56         $xmlbase = $parsed_xml->post;
  57
  58         logger('diaspora_dispatch: ' . print_r($xmlbase,true), LOGGER_DEBUG);
  59
  60
  61         if($xmlbase->request) {
  62                 $ret = diaspora_request($importer,$xmlbase->request);
  63         }
  64         elseif($xmlbase->status_message) {
  65                 $ret = diaspora_post($importer,$xmlbase->status_message,$msg);
  66         }
  67         elseif($xmlbase->profile) {
  68                 $ret = diaspora_profile($importer,$xmlbase->profile,$msg);
  69         }
  70         elseif($xmlbase->comment) {
  71                 $ret = diaspora_comment($importer,$xmlbase->comment,$msg);
  72         }
  73         elseif($xmlbase->like) {
  74                 $ret = diaspora_like($importer,$xmlbase->like,$msg);
  75         }
  76         elseif($xmlbase->asphoto) {
  77                 $ret = diaspora_asphoto($importer,$xmlbase->asphoto,$msg);
  78         }
  79         elseif($xmlbase->reshare) {
  80                 $ret = diaspora_reshare($importer,$xmlbase->reshare,$msg);
  81         }
  82         elseif($xmlbase->retraction) {
  83                 $ret = diaspora_retraction($importer,$xmlbase->retraction,$msg);
  84         }
  85         elseif($xmlbase->signed_retraction) {
  86                 $ret = diaspora_signed_retraction($importer,$xmlbase->signed_retraction,$msg);
  87         }
  88         elseif($xmlbase->relayable_retraction) {
  89                 $ret = diaspora_signed_retraction($importer,$xmlbase->relayable_retraction,$msg);
  90         }
  91         elseif($xmlbase->photo) {
  92                 $ret = diaspora_photo($importer,$xmlbase->photo,$msg,$attempt);
  93         }
  94         elseif($xmlbase->conversation) {
  95                 $ret = diaspora_conversation($importer,$xmlbase->conversation,$msg);
  96         }
  97         elseif($xmlbase->message) {
  98                 $ret = diaspora_message($importer,$xmlbase->message,$msg);
  99         }
 100         else {
 101                 logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true));
 102         }
 103         return $ret;
 104 }
 105
 106 function diaspora_handle_from_contact($contact_id) {
 107         $handle = False;
 108
 109         logger("diaspora_handle_from_contact: contact id is " . $contact_id, LOGGER_DEBUG);
 110
 111         $r = q("SELECT network, addr, self, url, nick FROM contact WHERE id = %d",
 112                intval($contact_id)
 113         );
 114         if($r) {
 115                 $contact = $r[0];
 116
 117                 logger("diaspora_handle_from_contact: contact 'self' = " . $contact['self'] . " 'url' = " . $contact['url'], LOGGER_DEBUG);
 118
 119                 if($contact['network'] === NETWORK_DIASPORA) {
 120                         $handle = $contact['addr'];
 121
 122 //                      logger("diaspora_handle_from_contact: contact id is a Diaspora person, handle = " . $handle, LOGGER_DEBUG);
 123                 }
 124                 elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
 125                         $baseurl_start = strpos($contact['url'],'://') + 3;
 126                         $baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
 127                         $baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
 128                         $handle = $contact['nick'] . '@' . $baseurl;
 129
 130 //                      logger("diaspora_handle_from_contact: contact id is a DFRN person, handle = " . $handle, LOGGER_DEBUG);
 131                 }
 132         }
 133
 134         return $handle;
 135 }
 136
 137 function diaspora_get_contact_by_handle($uid,$handle) {
 138         $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `addr` = '%s' LIMIT 1",
 139                 dbesc(NETWORK_DIASPORA),
 140                 intval($uid),
 141                 dbesc($handle)
 142         );
 143         if($r && count($r))
 144                 return $r[0];
 145
 146         $handle_parts = explode("@", $handle);
 147         $nurl_sql = '%%://' . $handle_parts[1] . '%%/profile/' . $handle_parts[0];
 148         $r = q("SELECT * FROM contact WHERE network = '%s' AND uid = %d AND nurl LIKE '%s' LIMIT 1",
 149                dbesc(NETWORK_DFRN),
 150                intval($uid),
 151                dbesc($nurl_sql)
 152         );
 153         if($r && count($r))
 154                 return $r[0];
 155
 156         return false;
 157 }
 158
 159 function find_diaspora_person_by_handle($handle) {
 160
 161         $person = false;
 162         $update = false;
 163         $got_lock = false;
 164
 165         $endlessloop = 0;
 166         $maxloops = 10;
 167
 168         do {
 169                 $r = q("select * from fcontact where network = '%s' and addr = '%s' limit 1",
 170                         dbesc(NETWORK_DIASPORA),
 171                         dbesc($handle)
 172                 );
 173                 if(count($r)) {
 174                         $person = $r[0];
 175                         logger('find_diaspora_person_by handle: in cache ' . print_r($r,true), LOGGER_DEBUG);
 176
 177                         // update record occasionally so it doesn't get stale
 178                         $d = strtotime($person['updated'] . ' +00:00');
 179                         if($d < strtotime('now - 14 days'))
 180                                 $update = true;
 181                 }
 182
 183
 184                 // FETCHING PERSON INFORMATION FROM REMOTE SERVER
 185                 //
 186                 // If the person isn't in our 'fcontact' table, or if he/she is but
 187                 // his/her information hasn't been updated for more than 14 days, then
 188                 // we want to fetch the person's information from the remote server.
 189                 //
 190                 // Note that $person isn't changed by this block of code unless the
 191                 // person's information has been successfully fetched from the remote
 192                 // server. So if $person was 'false' to begin with (because he/she wasn't
 193                 // in the local cache), it'll stay false, and if $person held the local
 194                 // cache information to begin with, it'll keep that information. That way
 195                 // if there's a problem with the remote fetch, we can at least use our
 196                 // cached information--it's better than nothing.
 197
 198                 if((! $person) || ($update))  {
 199                         // Lock the function to prevent race conditions if multiple items
 200                         // come in at the same time from a person who doesn't exist in
 201                         // fcontact
 202                         //
 203                         // Don't loop forever. On the last loop, try to create the contact
 204                         // whether the function is locked or not. Maybe the locking thread
 205                         // has died or something. At any rate, a duplicate in 'fcontact'
 206                         // is a much smaller problem than a deadlocked thread
 207                         $got_lock = lock_function('find_diaspora_person_by_handle', false);
 208                         if(($endlessloop + 1) >= $maxloops)
 209                                 $got_lock = true;
 210
 211                         if($got_lock) {
 212                                 logger('find_diaspora_person_by_handle: create or refresh', LOGGER_DEBUG);
 213                                 require_once('include/Scrape.php');
 214                                 $r = probe_url($handle, PROBE_DIASPORA);
 215
 216                                 // Note that Friendica contacts can return a "Diaspora person"
 217                                 // if Diaspora connectivity is enabled on their server
 218                                 if((count($r)) && ($r['network'] === NETWORK_DIASPORA)) {
 219                                         add_fcontact($r,$update);
 220                                         $person = ($r);
 221                                 }
 222
 223                                 unlock_function('find_diaspora_person_by_handle');
 224                         }
 225                         else {
 226                                 logger('find_diaspora_person_by_handle: couldn\'t lock function', LOGGER_DEBUG);
 227                                 if(! $person)
 228                                         block_on_function_lock('find_diaspora_person_by_handle');
 229                         }
 230                 }
 231         } while((! $person) && (! $got_lock) && (++$endlessloop < $maxloops));
 232         // We need to try again if the person wasn't in 'fcontact' but the function was locked.
 233         // The fact that the function was locked may mean that another process was creating the
 234         // person's record. It could also mean another process was creating or updating an unrelated
 235         // person.
 236         //
 237         // At any rate, we need to keep trying until we've either got the person or had a chance to
 238         // try to fetch his/her remote information. But we don't want to block on locking the
 239         // function, because if the other process is creating the record, then when we acquire the lock
 240         // we'll dive right into creating another, duplicate record. We DO want to at least wait
 241         // until the lock is released, so we don't flood the database with requests.
 242         //
 243         // If the person was in the 'fcontact' table, don't try again. It's not worth the time, since
 244         // we do have some information for the person
 245
 246         return $person;
 247 }
 248
 249
 250 function get_diaspora_key($uri) {
 251         logger('Fetching diaspora key for: ' . $uri);
 252
 253         $r = find_diaspora_person_by_handle($uri);
 254         if($r)
 255                 return $r['pubkey'];
 256         return '';
 257 }
 258
 259
 260 function diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey) {
 261         $a = get_app();
 262
 263         logger('diaspora_pubmsg_build: ' . $msg, LOGGER_DATA);
 264
 265
 266         $handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
 267
 268 //      $b64_data = base64_encode($msg);
 269 //      $b64url_data = base64url_encode($b64_data);
 270
 271         $b64url_data = base64url_encode($msg);
 272
 273         $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
 274
 275         $type = 'application/xml';
 276         $encoding = 'base64url';
 277         $alg = 'RSA-SHA256';
 278
 279         $signable_data = $data  . '.' . base64url_encode($type) . '.'
 280                 . base64url_encode($encoding) . '.' . base64url_encode($alg) ;
 281
 282         $signature = rsa_sign($signable_data,$prvkey);
 283         $sig = base64url_encode($signature);
 284
 285 $magic_env = <<< EOT
 286 <?xml version='1.0' encoding='UTF-8'?>
 287 <diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
 288   <header>
 289     <author_id>$handle</author_id>
 290   </header>
 291   <me:env>
 292     <me:encoding>base64url</me:encoding>
 293     <me:alg>RSA-SHA256</me:alg>
 294     <me:data type="application/xml">$data</me:data>
 295     <me:sig>$sig</me:sig>
 296   </me:env>
 297 </diaspora>
 298 EOT;
 299
 300         logger('diaspora_pubmsg_build: magic_env: ' . $magic_env, LOGGER_DATA);
 301         return $magic_env;
 302
 303 }
 304
 305
 306
 307
 308 function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey,$public = false) {
 309         $a = get_app();
 310
 311         if($public)
 312                 return diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey);
 313
 314         logger('diaspora_msg_build: ' . $msg, LOGGER_DATA);
 315
 316         // without a public key nothing will work
 317
 318         if(! $pubkey) {
 319                 logger('diaspora_msg_build: pubkey missing: contact id: ' . $contact['id']);
 320                 return '';
 321         }
 322
 323         $inner_aes_key = random_string(32);
 324         $b_inner_aes_key = base64_encode($inner_aes_key);
 325         $inner_iv = random_string(16);
 326         $b_inner_iv = base64_encode($inner_iv);
 327
 328         $outer_aes_key = random_string(32);
 329         $b_outer_aes_key = base64_encode($outer_aes_key);
 330         $outer_iv = random_string(16);
 331         $b_outer_iv = base64_encode($outer_iv);
 332
 333         $handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
 334
 335         $padded_data = pkcs5_pad($msg,16);
 336         $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
 337
 338         $b64_data = base64_encode($inner_encrypted);
 339
 340
 341         $b64url_data = base64url_encode($b64_data);
 342         $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
 343
 344         $type = 'application/xml';
 345         $encoding = 'base64url';
 346         $alg = 'RSA-SHA256';
 347
 348         $signable_data = $data  . '.' . base64url_encode($type) . '.'
 349                 . base64url_encode($encoding) . '.' . base64url_encode($alg) ;
 350
 351         $signature = rsa_sign($signable_data,$prvkey);
 352         $sig = base64url_encode($signature);
 353
 354 $decrypted_header = <<< EOT
 355 <decrypted_header>
 356   <iv>$b_inner_iv</iv>
 357   <aes_key>$b_inner_aes_key</aes_key>
 358   <author_id>$handle</author_id>
 359 </decrypted_header>
 360 EOT;
 361
 362         $decrypted_header = pkcs5_pad($decrypted_header,16);
 363
 364         $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
 365
 366         $outer_json = json_encode(array('iv' => $b_outer_iv,'key' => $b_outer_aes_key));
 367
 368         $encrypted_outer_key_bundle = '';
 369         openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey);
 370
 371         $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
 372
 373         logger('outer_bundle: ' . $b64_encrypted_outer_key_bundle . ' key: ' . $pubkey, LOGGER_DATA);
 374
 375         $encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle),
 376                 'ciphertext' => base64_encode($ciphertext)));
 377         $cipher_json = base64_encode($encrypted_header_json_object);
 378
 379         $encrypted_header = '<encrypted_header>' . $cipher_json . '</encrypted_header>';
 380
 381 $magic_env = <<< EOT
 382 <?xml version='1.0' encoding='UTF-8'?>
 383 <diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
 384   $encrypted_header
 385   <me:env>
 386     <me:encoding>base64url</me:encoding>
 387     <me:alg>RSA-SHA256</me:alg>
 388     <me:data type="application/xml">$data</me:data>
 389     <me:sig>$sig</me:sig>
 390   </me:env>
 391 </diaspora>
 392 EOT;
 393
 394         logger('diaspora_msg_build: magic_env: ' . $magic_env, LOGGER_DATA);
 395         return $magic_env;
 396
 397 }
 398
 399 /**
 400  *
 401  * diaspora_decode($importer,$xml)
 402  *   array $importer -> from user table
 403  *   string $xml -> urldecoded Diaspora salmon
 404  *
 405  * Returns array
 406  * 'message' -> decoded Diaspora XML message
 407  * 'author' -> author diaspora handle
 408  * 'key' -> author public key (converted to pkcs#8)
 409  *
 410  * Author and key are used elsewhere to save a lookup for verifying replies and likes
 411  */
 412
 413
 414 function diaspora_decode($importer,$xml) {
 415
 416         $public = false;
 417         $basedom = parse_xml_string($xml);
 418
 419         $children = $basedom->children('https://joindiaspora.com/protocol');
 420
 421         if($children->header) {
 422                 $public = true;
 423                 $author_link = str_replace('acct:','',$children->header->author_id);
 424         }
 425         else {
 426
 427                 $encrypted_header = json_decode(base64_decode($children->encrypted_header));
 428
 429                 $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
 430                 $ciphertext = base64_decode($encrypted_header->ciphertext);
 431
 432                 $outer_key_bundle = '';
 433                 openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
 434
 435                 $j_outer_key_bundle = json_decode($outer_key_bundle);
 436
 437                 $outer_iv = base64_decode($j_outer_key_bundle->iv);
 438                 $outer_key = base64_decode($j_outer_key_bundle->key);
 439
 440                 $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
 441
 442
 443                 $decrypted = pkcs5_unpad($decrypted);
 444
 445                 /**
 446                  * $decrypted now contains something like
 447                  *
 448                  *  <decrypted_header>
 449                  *     <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
 450                  *     <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
 451
 452 ***** OBSOLETE
 453
 454                  *     <author>
 455                  *       <name>Ryan Hughes</name>
 456                  *       <uri>acct:galaxor@diaspora.pirateship.org</uri>
 457                  *     </author>
 458
 459 ***** CURRENT
 460
 461                  *     <author_id>galaxor@diaspora.priateship.org</author_id>
 462
 463 ***** END DIFFS
 464
 465                  *  </decrypted_header>
 466                  */
 467
 468                 logger('decrypted: ' . $decrypted, LOGGER_DEBUG);
 469                 $idom = parse_xml_string($decrypted,false);
 470
 471                 $inner_iv = base64_decode($idom->iv);
 472                 $inner_aes_key = base64_decode($idom->aes_key);
 473
 474                 $author_link = str_replace('acct:','',$idom->author_id);
 475
 476         }
 477
 478         $dom = $basedom->children(NAMESPACE_SALMON_ME);
 479
 480         // figure out where in the DOM tree our data is hiding
 481
 482         if($dom->provenance->data)
 483                 $base = $dom->provenance;
 484         elseif($dom->env->data)
 485                 $base = $dom->env;
 486         elseif($dom->data)
 487                 $base = $dom;
 488
 489         if(! $base) {
 490                 logger('mod-diaspora: unable to locate salmon data in xml ');
 491                 http_status_exit(400);
 492         }
 493
 494
 495         // Stash the signature away for now. We have to find their key or it won't be good for anything.
 496         $signature = base64url_decode($base->sig);
 497
 498         // unpack the  data
 499
 500         // strip whitespace so our data element will return to one big base64 blob
 501         $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
 502
 503
 504         // stash away some other stuff for later
 505
 506         $type = $base->data[0]->attributes()->type[0];
 507         $keyhash = $base->sig[0]->attributes()->keyhash[0];
 508         $encoding = $base->encoding;
 509         $alg = $base->alg;
 510
 511
 512         $signed_data = $data  . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
 513
 514
 515         // decode the data
 516         $data = base64url_decode($data);
 517
 518
 519         if($public) {
 520                 $inner_decrypted = $data;
 521         }
 522         else {
 523
 524                 // Decode the encrypted blob
 525
 526                 $inner_encrypted = base64_decode($data);
 527                 $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
 528                 $inner_decrypted = pkcs5_unpad($inner_decrypted);
 529         }
 530
 531         if(! $author_link) {
 532                 logger('mod-diaspora: Could not retrieve author URI.');
 533                 http_status_exit(400);
 534         }
 535
 536         // Once we have the author URI, go to the web and try to find their public key
 537         // (first this will look it up locally if it is in the fcontact cache)
 538         // This will also convert diaspora public key from pkcs#1 to pkcs#8
 539
 540         logger('mod-diaspora: Fetching key for ' . $author_link );
 541         $key = get_diaspora_key($author_link);
 542
 543         if(! $key) {
 544                 logger('mod-diaspora: Could not retrieve author key.');
 545                 http_status_exit(400);
 546         }
 547
 548         $verify = rsa_verify($signed_data,$signature,$key);
 549
 550         if(! $verify) {
 551                 logger('mod-diaspora: Message did not verify. Discarding.');
 552                 http_status_exit(400);
 553         }
 554
 555         logger('mod-diaspora: Message verified.');
 556
 557         return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
 558
 559 }
 560
 561
 562 function diaspora_request($importer,$xml) {
 563
 564         $a = get_app();
 565
 566         $sender_handle = unxmlify($xml->sender_handle);
 567         $recipient_handle = unxmlify($xml->recipient_handle);
 568
 569         if(! $sender_handle || ! $recipient_handle)
 570                 return;
 571
 572         $contact = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
 573
 574         if($contact) {
 575
 576                 // perhaps we were already sharing with this person. Now they're sharing with us.
 577                 // That makes us friends.
 578
 579                 if($contact['rel'] == CONTACT_IS_FOLLOWER && $importer['page-flags'] != PAGE_COMMUNITY) {
 580                         q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
 581                                 intval(CONTACT_IS_FRIEND),
 582                                 intval($contact['id']),
 583                                 intval($importer['uid'])
 584                         );
 585                 }
 586                 // send notification
 587
 588                 $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 589                         intval($importer['uid'])
 590                 );
 591
 592                 if((count($r)) && (!$r[0]['hide-friends']) && (!$contact['hidden']) && intval(get_pconfig($importer['uid'],'system','post_newfriend'))) {
 593                         require_once('include/items.php');
 594
 595                         $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 596                                 intval($importer['uid'])
 597                         );
 598
 599                         // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
 600
 601                         if(count($self) && $contact['rel'] == CONTACT_IS_FOLLOWER) {
 602
 603                                 $arr = array();
 604                                 $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $importer['uid']);
 605                                 $arr['uid'] = $importer['uid'];
 606                                 $arr['contact-id'] = $self[0]['id'];
 607                                 $arr['wall'] = 1;
 608                                 $arr['type'] = 'wall';
 609                                 $arr['gravity'] = 0;
 610                                 $arr['origin'] = 1;
 611                                 $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 612                                 $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 613                                 $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 614                                 $arr['verb'] = ACTIVITY_FRIEND;
 615                                 $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 616
 617                                 $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 618                                 $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 619                                 $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 620                                 $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
 621
 622                                 $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 623                                         . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 624                                 $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 625                                 $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 626                                 $arr['object'] .= '</link></object>' . "\n";
 627                                 $arr['last-child'] = 1;
 628
 629                                 $arr['allow_cid'] = $user[0]['allow_cid'];
 630                                 $arr['allow_gid'] = $user[0]['allow_gid'];
 631                                 $arr['deny_cid']  = $user[0]['deny_cid'];
 632                                 $arr['deny_gid']  = $user[0]['deny_gid'];
 633
 634                                 $i = item_store($arr);
 635                                 if($i)
 636                                 proc_run('php',"include/notifier.php","activity","$i");
 637
 638                         }
 639
 640                 }
 641
 642                 return;
 643         }
 644
 645         $ret = find_diaspora_person_by_handle($sender_handle);
 646
 647
 648         if((! count($ret)) || ($ret['network'] != NETWORK_DIASPORA)) {
 649                 logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle);
 650                 return;
 651         }
 652
 653         $batch = (($ret['batch']) ? $ret['batch'] : implode('/', array_slice(explode('/',$ret['url']),0,3)) . '/receive/public');
 654
 655
 656
 657         $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
 658                 VALUES ( %d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d) ",
 659                 intval($importer['uid']),
 660                 dbesc($ret['network']),
 661                 dbesc($ret['addr']),
 662                 datetime_convert(),
 663                 dbesc($ret['url']),
 664                 dbesc(normalise_link($ret['url'])),
 665                 dbesc($batch),
 666                 dbesc($ret['name']),
 667                 dbesc($ret['nick']),
 668                 dbesc($ret['photo']),
 669                 dbesc($ret['pubkey']),
 670                 dbesc($ret['notify']),
 671                 dbesc($ret['poll']),
 672                 1,
 673                 2
 674         );
 675
 676         // find the contact record we just created
 677
 678         $contact_record = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
 679
 680         if(! $contact_record) {
 681                 logger('diaspora_request: unable to locate newly created contact record.');
 682                 return;
 683         }
 684
 685         $g = q("select def_gid from user where uid = %d limit 1",
 686                 intval($importer['uid'])
 687         );
 688         if($g && intval($g[0]['def_gid'])) {
 689                 require_once('include/group.php');
 690                 group_add_member($importer['uid'],'',$contact_record['id'],$g[0]['def_gid']);
 691         }
 692
 693         if($importer['page-flags'] == PAGE_NORMAL) {
 694
 695                 $hash = random_string() . (string) time();   // Generate a confirm_key
 696
 697                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime` )
 698                         VALUES ( %d, %d, %d, %d, '%s', '%s', '%s' )",
 699                         intval($importer['uid']),
 700                         intval($contact_record['id']),
 701                         0,
 702                         0,
 703                         dbesc( t('Sharing notification from Diaspora network')),
 704                         dbesc($hash),
 705                         dbesc(datetime_convert())
 706                 );
 707         }
 708         else {
 709
 710                 // automatic friend approval
 711
 712                 require_once('include/Photo.php');
 713
 714                 $photos = import_profile_photo($contact_record['photo'],$importer['uid'],$contact_record['id']);
 715
 716                 // technically they are sharing with us (CONTACT_IS_SHARING),
 717                 // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
 718                 // we are going to change the relationship and make them a follower.
 719
 720                 if($importer['page-flags'] == PAGE_FREELOVE)
 721                         $new_relation = CONTACT_IS_FRIEND;
 722                 else
 723                         $new_relation = CONTACT_IS_FOLLOWER;
 724
 725                 $r = q("UPDATE `contact` SET
 726                         `photo` = '%s',
 727                         `thumb` = '%s',
 728                         `micro` = '%s',
 729                         `rel` = %d,
 730                         `name-date` = '%s',
 731                         `uri-date` = '%s',
 732                         `avatar-date` = '%s',
 733                         `blocked` = 0,
 734                         `pending` = 0
 735                         WHERE `id` = %d
 736                         ",
 737                         dbesc($photos[0]),
 738                         dbesc($photos[1]),
 739                         dbesc($photos[2]),
 740                         intval($new_relation),
 741                         dbesc(datetime_convert()),
 742                         dbesc(datetime_convert()),
 743                         dbesc(datetime_convert()),
 744                         intval($contact_record['id'])
 745                 );
 746
 747                 $u = q("select * from user where uid = %d limit 1",intval($importer['uid']));
 748                 if($u)
 749                         $ret = diaspora_share($u[0],$contact_record);
 750         }
 751
 752         return;
 753 }
 754
 755 function diaspora_post_allow($importer,$contact) {
 756
 757         // perhaps we were already sharing with this person. Now they're sharing with us.
 758         // That makes us friends.
 759         // Normally this should have handled by getting a request - but this could get lost
 760         if($contact['rel'] == CONTACT_IS_FOLLOWER && $importer['page-flags'] != PAGE_COMMUNITY) {
 761                 q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
 762                         intval(CONTACT_IS_FRIEND),
 763                         intval($contact['id']),
 764                         intval($importer['uid'])
 765                 );
 766                 $contact['rel'] = CONTACT_IS_FRIEND;
 767                 logger('diaspora_post_allow: defining user '.$contact["nick"].' as friend');
 768         }
 769
 770         if(($contact['blocked']) || ($contact['readonly']) || ($contact['archive']))
 771                 return false;
 772         if($contact['rel'] == CONTACT_IS_SHARING || $contact['rel'] == CONTACT_IS_FRIEND)
 773                 return true;
 774         if($contact['rel'] == CONTACT_IS_FOLLOWER)
 775                 if($importer['page-flags'] == PAGE_COMMUNITY)
 776                         return true;
 777         return false;
 778 }
 779
 780
 781 function diaspora_post($importer,$xml,$msg) {
 782
 783         $a = get_app();
 784         $guid = notags(unxmlify($xml->guid));
 785         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
 786
 787         if($diaspora_handle != $msg['author']) {
 788                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
 789                 return 202;
 790         }
 791
 792         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
 793         if(! $contact)
 794                 return;
 795
 796         if(! diaspora_post_allow($importer,$contact)) {
 797                 logger('diaspora_post: Ignoring this author.');
 798                 return 202;
 799         }
 800
 801         $message_id = $diaspora_handle . ':' . $guid;
 802         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
 803                 intval($importer['uid']),
 804                 dbesc($message_id),
 805                 dbesc($guid)
 806         );
 807         if(count($r)) {
 808                 logger('diaspora_post: message exists: ' . $guid);
 809                 return;
 810         }
 811
 812         // allocate a guid on our system - we aren't fixing any collisions.
 813         // we're ignoring them
 814
 815         $g = q("select * from guid where guid = '%s' limit 1",
 816                 dbesc($guid)
 817         );
 818         if(! count($g)) {
 819                 q("insert into guid ( guid ) values ( '%s' )",
 820                         dbesc($guid)
 821                 );
 822         }
 823
 824         $created = unxmlify($xml->created_at);
 825         $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
 826
 827         $body = diaspora2bb($xml->raw_message);
 828
 829         // Add OEmbed and other information to the body
 830         $body = add_page_info_to_body($body, false, true);
 831
 832         $datarray = array();
 833
 834         $str_tags = '';
 835
 836         $tags = get_tags($body);
 837
 838         if(count($tags)) {
 839                 foreach($tags as $tag) {
 840                         if(strpos($tag,'#') === 0) {
 841                                 if(strpos($tag,'[url='))
 842                                         continue;
 843
 844                                 // don't link tags that are already embedded in links
 845
 846                                 if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body))
 847                                         continue;
 848                                 if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body))
 849                                         continue;
 850
 851                                 $basetag = str_replace('_',' ',substr($tag,1));
 852                                 $body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body);
 853                                 if(strlen($str_tags))
 854                                         $str_tags .= ',';
 855                                 $str_tags .= '#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
 856                                 continue;
 857                         }
 858                 }
 859         }
 860
 861         $cnt = preg_match_all('/@\[url=(.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
 862         if($cnt) {
 863                 foreach($matches as $mtch) {
 864                         if(strlen($str_tags))
 865                                 $str_tags .= ',';
 866                         $str_tags .= '@[url=' . $mtch[1] . '[/url]';
 867                 }
 868         }
 869
 870         $plink = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1).'/posts/'.$guid;
 871
 872         $datarray['uid'] = $importer['uid'];
 873         $datarray['contact-id'] = $contact['id'];
 874         $datarray['wall'] = 0;
 875         $datarray['network'] = NETWORK_DIASPORA;
 876         $datarray['verb'] = ACTIVITY_POST;
 877         $datarray['guid'] = $guid;
 878         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
 879         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
 880         $datarray['private'] = $private;
 881         $datarray['parent'] = 0;
 882         $datarray['plink'] = $plink;
 883         $datarray['owner-name'] = $contact['name'];
 884         $datarray['owner-link'] = $contact['url'];
 885         //$datarray['owner-avatar'] = $contact['thumb'];
 886         $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
 887         $datarray['author-name'] = $contact['name'];
 888         $datarray['author-link'] = $contact['url'];
 889         $datarray['author-avatar'] = $contact['thumb'];
 890         $datarray['body'] = $body;
 891         $datarray['tag'] = $str_tags;
 892         $datarray['app']  = 'Diaspora';
 893
 894         // if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible.
 895
 896         $datarray['visible'] = ((strlen($body)) ? 1 : 0);
 897
 898         DiasporaFetchGuid($datarray);
 899         $message_id = item_store($datarray);
 900
 901         return;
 902
 903 }
 904
 905 function DiasporaFetchGuid($item) {
 906         preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
 907                 function ($match) use ($item){
 908                         return(DiasporaFetchGuidSub($match, $item));
 909                 },$item["body"]);
 910 }
 911
 912 function DiasporaFetchGuidSub($match, $item) {
 913         $a = get_app();
 914
 915         $author = parse_url($item["author-link"]);
 916         $authorserver = $author["scheme"]."://".$author["host"];
 917
 918         $owner = parse_url($item["owner-link"]);
 919         $ownerserver = $owner["scheme"]."://".$owner["host"];
 920
 921         if (!diaspora_store_by_guid($match[1], $authorserver))
 922                 diaspora_store_by_guid($match[1], $ownerserver);
 923 }
 924
 925 function diaspora_store_by_guid($guid, $server) {
 926         require_once("include/Contact.php");
 927
 928         logger("fetching item ".$guid." from ".$server, LOGGER_DEBUG);
 929
 930         $item = diaspora_fetch_message($guid, $server);
 931
 932         if (!$item)
 933                 return false;
 934
 935         $body = $item["body"];
 936         $str_tags = $item["tag"];
 937         $app = $item["app"];
 938         $created = $item["created"];
 939         $author = $item["author"];
 940         $guid = $item["guid"];
 941         $private = $item["private"];
 942
 943         $message_id = $author.':'.$guid;
 944         $r = q("SELECT `id` FROM `item` WHERE `uid` = 0 AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
 945                 dbesc($message_id),
 946                 dbesc($guid)
 947         );
 948         if(count($r))
 949                 return $r[0]["id"];
 950
 951         $person = find_diaspora_person_by_handle($author);
 952
 953         $datarray = array();
 954
 955         $datarray['uid'] = 0;
 956         $datarray['contact-id'] = get_contact($person['url'], 0);
 957         $datarray['wall'] = 0;
 958         $datarray['network']  = NETWORK_DIASPORA;
 959         $datarray['guid'] = $guid;
 960         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
 961         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
 962         $datarray['private'] = $private;
 963         $datarray['parent'] = 0;
 964         $datarray['plink'] = 'https://'.substr($author,strpos($author,'@')+1).'/posts/'.$guid;
 965         $datarray['author-name'] = $person['name'];
 966         $datarray['author-link'] = $person['url'];
 967         $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
 968         $datarray['owner-name'] = $datarray['author-name'];
 969         $datarray['owner-link'] = $datarray['author-link'];
 970         $datarray['owner-avatar'] = $datarray['author-avatar'];
 971         $datarray['body'] = $body;
 972         $datarray['tag'] = $str_tags;
 973         $datarray['app']  = $app;
 974         $datarray['visible'] = ((strlen($body)) ? 1 : 0);
 975
 976         DiasporaFetchGuid($datarray);
 977         $message_id = item_store($datarray);
 978
 979         // To-Do:
 980         // Looking if there is some subscribe mechanism in Diaspora to get all comments for this post
 981
 982         return $message_id;
 983 }
 984
 985 function diaspora_fetch_message($guid, $server, $level = 0) {
 986
 987         if ($level > 5)
 988                 return false;
 989
 990         $a = get_app();
 991
 992         // This will not work if the server is not a Diaspora server
 993         $source_url = $server.'/p/'.$guid.'.xml';
 994         $x = fetch_url($source_url);
 995         if(!$x)
 996                 return false;
 997
 998         $x = str_replace(array('<activity_streams-photo>','</activity_streams-photo>'),array('<asphoto>','</asphoto>'),$x);
 999         $source_xml = parse_xml_string($x,false);
1000
1001         $item = array();
1002         $item["app"] = 'Diaspora';
1003         $item["guid"] = $guid;
1004         $body = "";
1005
1006         if ($source_xml->post->status_message->created_at)
1007                 $item["created"] = unxmlify($source_xml->post->status_message->created_at);
1008
1009         if ($source_xml->post->status_message->provider_display_name)
1010                 $item["app"] = unxmlify($source_xml->post->status_message->provider_display_name);
1011
1012         if ($source_xml->post->status_message->diaspora_handle)
1013                 $item["author"] = unxmlify($source_xml->post->status_message->diaspora_handle);
1014
1015         if ($source_xml->post->status_message->guid)
1016                 $item["guid"] = unxmlify($source_xml->post->status_message->guid);
1017
1018         $item["private"] = (unxmlify($source_xml->post->status_message->public) == 'false');
1019
1020         if(strlen($source_xml->post->asphoto->objectId) && ($source_xml->post->asphoto->objectId != 0) && ($source_xml->post->asphoto->image_url)) {
1021                 $body = '[url=' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '][img]' . notags(unxmlify($source_xml->post->asphoto->objectId)) . '[/img][/url]' . "\n";
1022                 $body = scale_external_images($body,false);
1023         } elseif($source_xml->post->asphoto->image_url) {
1024                 $body = '[img]' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '[/img]' . "\n";
1025                 $body = scale_external_images($body);
1026         } elseif($source_xml->post->status_message) {
1027                 $body = diaspora2bb($source_xml->post->status_message->raw_message);
1028
1029                 // Checking for embedded pictures
1030                 if($source_xml->post->status_message->photo->remote_photo_path AND
1031                         $source_xml->post->status_message->photo->remote_photo_name) {
1032
1033                         $remote_photo_path = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_path));
1034                         $remote_photo_name = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_name));
1035
1036                         $body = '[img]'.$remote_photo_path.$remote_photo_name.'[/img]'."\n".$body;
1037
1038                         logger('embedded picture link found: '.$body, LOGGER_DEBUG);
1039                 }
1040
1041                 $body = scale_external_images($body);
1042
1043                 // Add OEmbed and other information to the body
1044                 $body = add_page_info_to_body($body, false, true);
1045         } elseif($source_xml->post->reshare) {
1046                 // Reshare of a reshare
1047                 return diaspora_fetch_message($source_xml->post->reshare->root_guid, $server, ++$level);
1048         } else {
1049                 // Maybe it is a reshare of a photo that will be delivered at a later time (testing)
1050                 logger('no content found: '.print_r($source_xml,true));
1051                 $body = "";
1052         }
1053
1054         if ($body == "")
1055                 return false;
1056
1057         $item["tag"] = '';
1058
1059         $tags = get_tags($body);
1060
1061         if(count($tags)) {
1062                 foreach($tags as $tag) {
1063                         if(strpos($tag,'#') === 0) {
1064                                 if(strpos($tag,'[url='))
1065                                         continue;
1066
1067                                 // don't link tags that are already embedded in links
1068
1069                                 if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body))
1070                                         continue;
1071                                 if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body))
1072                                         continue;
1073
1074
1075                                 $basetag = str_replace('_',' ',substr($tag,1));
1076                                 $body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body);
1077                                 if(strlen($item["tag"]))
1078                                         $item["tag"] .= ',';
1079                                 $item["tag"] .= '#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1080                                 continue;
1081                         }
1082                 }
1083         }
1084
1085         $item["body"] = $body;
1086         return $item;
1087 }
1088
1089 function diaspora_reshare($importer,$xml,$msg) {
1090
1091         logger('diaspora_reshare: init: ' . print_r($xml,true));
1092
1093         $a = get_app();
1094         $guid = notags(unxmlify($xml->guid));
1095         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1096
1097
1098         if($diaspora_handle != $msg['author']) {
1099                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
1100                 return 202;
1101         }
1102
1103         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
1104         if(! $contact)
1105                 return;
1106
1107         if(! diaspora_post_allow($importer,$contact)) {
1108                 logger('diaspora_reshare: Ignoring this author: ' . $diaspora_handle . ' ' . print_r($xml,true));
1109                 return 202;
1110         }
1111
1112         $message_id = $diaspora_handle . ':' . $guid;
1113         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
1114                 intval($importer['uid']),
1115                 dbesc($message_id),
1116                 dbesc($guid)
1117         );
1118         if(count($r)) {
1119                 logger('diaspora_reshare: message exists: ' . $guid);
1120                 return;
1121         }
1122
1123         $orig_author = notags(unxmlify($xml->root_diaspora_id));
1124         $orig_guid = notags(unxmlify($xml->root_guid));
1125
1126         $create_original_post = false;
1127
1128         // Do we already have this item?
1129         $r = q("SELECT `body`, `tag`, `app`, `author-link`, `plink` FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
1130                 dbesc($orig_guid),
1131                 dbesc(NETWORK_DIASPORA)
1132         );
1133         if(count($r)) {
1134                 logger('reshared message '.orig_guid." reshared by ".$guid.' already exists on system: '.$orig_url);
1135
1136                 // Maybe it is already a reshared item?
1137                 // Then refetch the content, since there can be many side effects with reshared posts from other networks or reshares from reshares
1138                 require_once('include/api.php');
1139                 if (api_share_as_retweet($r[0]))
1140                         $r = array();
1141                 else
1142                         $orig_url = $a->get_baseurl().'/display/'.$orig_guid;
1143         }
1144
1145         if (!count($r)) {
1146                 $body = "";
1147                 $str_tags = "";
1148                 $app = "";
1149
1150                 $orig_url = 'https://'.substr($orig_author,strpos($orig_author,'@')+1).'/posts/'.$orig_guid;
1151
1152                 $server = 'https://'.substr($orig_author,strpos($orig_author,'@')+1);
1153                 logger('1st try: reshared message '.$orig_guid." reshared by ".$guid.' will be fetched from original server: '.$server);
1154                 $item = diaspora_fetch_message($orig_guid, $server);
1155
1156                 if (!$item) {
1157                         $server = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1);
1158                         logger('2nd try: reshared message '.$orig_guid." reshared by ".$guid." will be fetched from sharer's server: ".$server);
1159                         $item = diaspora_fetch_message($orig_guid, $server);
1160                 }
1161                 if (!$item) {
1162                         $server = 'http://'.substr($orig_author,strpos($orig_author,'@')+1);
1163                         logger('3rd try: reshared message '.$orig_guid." reshared by ".$guid.' will be fetched from original server: '.$server);
1164                         $item = diaspora_fetch_message($orig_guid, $server);
1165                 }
1166                 if (!$item) {
1167                         $server = 'http://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1);
1168                         logger('4th try: reshared message '.$orig_guid." reshared by ".$guid." will be fetched from sharer's server: ".$server);
1169                         $item = diaspora_fetch_message($orig_guid, $server);
1170                 }
1171
1172                 if ($item) {
1173                         $body = $item["body"];
1174                         $str_tags = $item["tag"];
1175                         $app = $item["app"];
1176                         $orig_created = $item["created"];
1177                         $orig_author = $item["author"];
1178                         $orig_guid = $item["guid"];
1179                         $create_original_post = ($body != "");
1180                         $orig_url = $a->get_baseurl()."/display/".$orig_guid;
1181                 }
1182         }
1183
1184         $person = find_diaspora_person_by_handle($orig_author);
1185
1186         // allocate a guid on our system - we aren't fixing any collisions.
1187         // we're ignoring them
1188
1189         $g = q("select * from guid where guid = '%s' limit 1",
1190                 dbesc($guid)
1191         );
1192         if(! count($g)) {
1193                 q("insert into guid ( guid ) values ( '%s' )",
1194                         dbesc($guid)
1195                 );
1196         }
1197
1198         $created = unxmlify($xml->created_at);
1199         $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
1200
1201         $datarray = array();
1202
1203         $plink = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1).'/posts/'.$guid;
1204
1205         $datarray['uid'] = $importer['uid'];
1206         $datarray['contact-id'] = $contact['id'];
1207         $datarray['wall'] = 0;
1208         $datarray['network']  = NETWORK_DIASPORA;
1209         $datarray['guid'] = $guid;
1210         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
1211         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
1212         $datarray['private'] = $private;
1213         $datarray['parent'] = 0;
1214         $datarray['plink'] = $plink;
1215         $datarray['owner-name'] = $contact['name'];
1216         $datarray['owner-link'] = $contact['url'];
1217         $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
1218         if (!intval(get_config('system','wall-to-wall_share'))) {
1219                 $prefix = "[share author='".str_replace(array("'", "[", "]"), array("&#x27;", "&#x5B;", "&#x5D;"),$person['name']).
1220                                 "' profile='".$person['url'].
1221                                 "' avatar='".((x($person,'thumb')) ? $person['thumb'] : $person['photo']).
1222                                 "' link='".str_replace(array("'", "[", "]"), array("&#x27;", "&#x5B;", "&#x5D;"),$orig_url)."']";
1223                 $datarray['author-name'] = $contact['name'];
1224                 $datarray['author-link'] = $contact['url'];
1225                 $datarray['author-avatar'] = $contact['thumb'];
1226                 $datarray['body'] = $prefix.$body."[/share]";
1227         } else {
1228                 // Let reshared messages look like wall-to-wall posts
1229                 $datarray['author-name'] = $person['name'];
1230                 $datarray['author-link'] = $person['url'];
1231                 $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1232                 $datarray['body'] = $body;
1233         }
1234
1235         $datarray['tag'] = $str_tags;
1236         $datarray['app']  = $app;
1237
1238         // if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible. (testing)
1239         $datarray['visible'] = ((strlen($body)) ? 1 : 0);
1240
1241         // Store the original item of a reshare
1242         if ($create_original_post) {
1243                 require_once("include/Contact.php");
1244
1245                 $datarray2 = $datarray;
1246
1247                 $datarray2['uid'] = 0;
1248                 $datarray2['contact-id'] = get_contact($person['url'], 0);
1249                 $datarray2['guid'] = $orig_guid;
1250                 $datarray2['uri'] = $datarray2['parent-uri'] = $orig_author.':'.$orig_guid;
1251                 $datarray2['changed'] = $datarray2['created'] = $datarray2['edited'] = datetime_convert('UTC','UTC',$orig_created);
1252                 $datarray2['plink'] = 'https://'.substr($orig_author,strpos($orig_author,'@')+1).'/posts/'.$orig_guid;
1253
1254                 $datarray2['author-name'] = $person['name'];
1255                 $datarray2['author-link'] = $person['url'];
1256                 $datarray2['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1257                 $datarray2['owner-name'] = $datarray2['author-name'];
1258                 $datarray2['owner-link'] = $datarray2['author-link'];
1259                 $datarray2['owner-avatar'] = $datarray2['author-avatar'];
1260                 $datarray2['body'] = $body;
1261
1262                 DiasporaFetchGuid($datarray2);
1263                 $message_id = item_store($datarray2);
1264
1265                 logger("Store original item ".$orig_guid." under message id ".$message_id);
1266         }
1267
1268         DiasporaFetchGuid($datarray);
1269         $message_id = item_store($datarray);
1270
1271         return;
1272
1273 }
1274
1275
1276 function diaspora_asphoto($importer,$xml,$msg) {
1277         logger('diaspora_asphoto called');
1278
1279         $a = get_app();
1280         $guid = notags(unxmlify($xml->guid));
1281         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1282
1283         if($diaspora_handle != $msg['author']) {
1284                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
1285                 return 202;
1286         }
1287
1288         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
1289         if(! $contact)
1290                 return;
1291
1292         if(! diaspora_post_allow($importer,$contact)) {
1293                 logger('diaspora_asphoto: Ignoring this author.');
1294                 return 202;
1295         }
1296
1297         $message_id = $diaspora_handle . ':' . $guid;
1298         $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
1299                 intval($importer['uid']),
1300                 dbesc($message_id),
1301                 dbesc($guid)
1302         );
1303         if(count($r)) {
1304                 logger('diaspora_asphoto: message exists: ' . $guid);
1305                 return;
1306         }
1307
1308         // allocate a guid on our system - we aren't fixing any collisions.
1309         // we're ignoring them
1310
1311         $g = q("select * from guid where guid = '%s' limit 1",
1312                 dbesc($guid)
1313         );
1314         if(! count($g)) {
1315                 q("insert into guid ( guid ) values ( '%s' )",
1316                         dbesc($guid)
1317                 );
1318         }
1319
1320         $created = unxmlify($xml->created_at);
1321         $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
1322
1323         if(strlen($xml->objectId) && ($xml->objectId != 0) && ($xml->image_url)) {
1324                 $body = '[url=' . notags(unxmlify($xml->image_url)) . '][img]' . notags(unxmlify($xml->objectId)) . '[/img][/url]' . "\n";
1325                 $body = scale_external_images($body,false);
1326         }
1327         elseif($xml->image_url) {
1328                 $body = '[img]' . notags(unxmlify($xml->image_url)) . '[/img]' . "\n";
1329                 $body = scale_external_images($body);
1330         }
1331         else {
1332                 logger('diaspora_asphoto: no photo url found.');
1333                 return;
1334         }
1335
1336         $plink = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1).'/posts/'.$guid;
1337
1338         $datarray = array();
1339
1340         $datarray['uid'] = $importer['uid'];
1341         $datarray['contact-id'] = $contact['id'];
1342         $datarray['wall'] = 0;
1343         $datarray['network']  = NETWORK_DIASPORA;
1344         $datarray['guid'] = $guid;
1345         $datarray['uri'] = $datarray['parent-uri'] = $message_id;
1346         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
1347         $datarray['private'] = $private;
1348         $datarray['parent'] = 0;
1349         $datarray['plink'] = $plink;
1350         $datarray['owner-name'] = $contact['name'];
1351         $datarray['owner-link'] = $contact['url'];
1352         //$datarray['owner-avatar'] = $contact['thumb'];
1353         $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
1354         $datarray['author-name'] = $contact['name'];
1355         $datarray['author-link'] = $contact['url'];
1356         $datarray['author-avatar'] = $contact['thumb'];
1357         $datarray['body'] = $body;
1358
1359         $datarray['app']  = 'Diaspora/Cubbi.es';
1360
1361         DiasporaFetchGuid($datarray);
1362         $message_id = item_store($datarray);
1363
1364         //if($message_id) {
1365         //      q("update item set plink = '%s' where id = %d",
1366         //              dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
1367         //              intval($message_id)
1368         //      );
1369         //}
1370
1371         return;
1372
1373 }
1374
1375
1376
1377
1378
1379
1380 function diaspora_comment($importer,$xml,$msg) {
1381
1382         $a = get_app();
1383         $guid = notags(unxmlify($xml->guid));
1384         $parent_guid = notags(unxmlify($xml->parent_guid));
1385         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1386         $target_type = notags(unxmlify($xml->target_type));
1387         $text = unxmlify($xml->text);
1388         $author_signature = notags(unxmlify($xml->author_signature));
1389
1390         $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
1391
1392         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1393         if(! $contact) {
1394                 logger('diaspora_comment: cannot find contact: ' . $msg['author']);
1395                 return;
1396         }
1397
1398         if(! diaspora_post_allow($importer,$contact)) {
1399                 logger('diaspora_comment: Ignoring this author.');
1400                 return 202;
1401         }
1402
1403         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1404                 intval($importer['uid']),
1405                 dbesc($guid)
1406         );
1407         if(count($r)) {
1408                 logger('diaspora_comment: our comment just got relayed back to us (or there was a guid collision) : ' . $guid);
1409                 return;
1410         }
1411
1412         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1413                 intval($importer['uid']),
1414                 dbesc($parent_guid)
1415         );
1416         if(! count($r)) {
1417                 logger('diaspora_comment: parent item not found: parent: ' . $parent_guid . ' item: ' . $guid);
1418                 return;
1419         }
1420         $parent_item = $r[0];
1421
1422
1423         /* How Diaspora performs comment signature checking:
1424
1425            - If an item has been sent by the comment author to the top-level post owner to relay on
1426              to the rest of the contacts on the top-level post, the top-level post owner should check
1427              the author_signature, then create a parent_author_signature before relaying the comment on
1428            - If an item has been relayed on by the top-level post owner, the contacts who receive it
1429              check only the parent_author_signature. Basically, they trust that the top-level post
1430              owner has already verified the authenticity of anything he/she sends out
1431            - In either case, the signature that get checked is the signature created by the person
1432              who sent the salmon
1433         */
1434
1435         $signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
1436         $key = $msg['key'];
1437
1438         if($parent_author_signature) {
1439                 // If a parent_author_signature exists, then we've received the comment
1440                 // relayed from the top-level post owner. There's no need to check the
1441                 // author_signature if the parent_author_signature is valid
1442
1443                 $parent_author_signature = base64_decode($parent_author_signature);
1444
1445                 if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
1446                         logger('diaspora_comment: top-level owner verification failed.');
1447                         return;
1448                 }
1449         }
1450         else {
1451                 // If there's no parent_author_signature, then we've received the comment
1452                 // from the comment creator. In that case, the person is commenting on
1453                 // our post, so he/she must be a contact of ours and his/her public key
1454                 // should be in $msg['key']
1455
1456                 $author_signature = base64_decode($author_signature);
1457
1458                 if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
1459                         logger('diaspora_comment: comment author verification failed.');
1460                         return;
1461                 }
1462         }
1463
1464         // Phew! Everything checks out. Now create an item.
1465
1466         // Find the original comment author information.
1467         // We need this to make sure we display the comment author
1468         // information (name and avatar) correctly.
1469         if(strcasecmp($diaspora_handle,$msg['author']) == 0)
1470                 $person = $contact;
1471         else {
1472                 $person = find_diaspora_person_by_handle($diaspora_handle);
1473
1474                 if(! is_array($person)) {
1475                         logger('diaspora_comment: unable to find author details');
1476                         return;
1477                 }
1478         }
1479
1480         $body = diaspora2bb($text);
1481         $message_id = $diaspora_handle . ':' . $guid;
1482
1483         $datarray = array();
1484
1485         $str_tags = '';
1486
1487         $tags = get_tags($body);
1488
1489         if(count($tags)) {
1490                 foreach($tags as $tag) {
1491                         if(strpos($tag,'#') === 0) {
1492                                 if(strpos($tag,'[url='))
1493                                         continue;
1494
1495                                 // don't link tags that are already embedded in links
1496
1497                                 if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body))
1498                                         continue;
1499                                 if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body))
1500                                         continue;
1501
1502
1503                                 $basetag = str_replace('_',' ',substr($tag,1));
1504                                 $body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body);
1505                                 if(strlen($str_tags))
1506                                         $str_tags .= ',';
1507                                 $str_tags .= '#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1508                                 continue;
1509                         }
1510                 }
1511         }
1512
1513         $datarray['uid'] = $importer['uid'];
1514         $datarray['contact-id'] = $contact['id'];
1515         $datarray['type'] = 'remote-comment';
1516         $datarray['wall'] = $parent_item['wall'];
1517         $datarray['network']  = NETWORK_DIASPORA;
1518         $datarray['verb'] = ACTIVITY_POST;
1519         $datarray['gravity'] = GRAVITY_COMMENT;
1520         $datarray['guid'] = $guid;
1521         $datarray['uri'] = $message_id;
1522         $datarray['parent-uri'] = $parent_item['uri'];
1523
1524         // No timestamps for comments? OK, we'll the use current time.
1525         $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert();
1526         $datarray['private'] = $parent_item['private'];
1527
1528         $datarray['owner-name'] = $parent_item['owner-name'];
1529         $datarray['owner-link'] = $parent_item['owner-link'];
1530         $datarray['owner-avatar'] = $parent_item['owner-avatar'];
1531
1532         $datarray['author-name'] = $person['name'];
1533         $datarray['author-link'] = $person['url'];
1534         $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
1535         $datarray['body'] = $body;
1536         $datarray['tag'] = $str_tags;
1537
1538         // We can't be certain what the original app is if the message is relayed.
1539         if(($parent_item['origin']) && (! $parent_author_signature))
1540                 $datarray['app']  = 'Diaspora';
1541
1542         DiasporaFetchGuid($datarray);
1543         $message_id = item_store($datarray);
1544
1545         //if($message_id) {
1546                 //q("update item set plink = '%s' where id = %d",
1547                 //      //dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
1548                 //      dbesc($a->get_baseurl().'/display/'.$datarray['guid']),
1549                 //      intval($message_id)
1550                 //);
1551         //}
1552
1553         if(($parent_item['origin']) && (! $parent_author_signature)) {
1554                 q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
1555                         intval($message_id),
1556                         dbesc($signed_data),
1557                         dbesc(base64_encode($author_signature)),
1558                         dbesc($diaspora_handle)
1559                 );
1560
1561                 // if the message isn't already being relayed, notify others
1562                 // the existence of parent_author_signature means the parent_author or owner
1563                 // is already relaying.
1564
1565                 proc_run('php','include/notifier.php','comment-import',$message_id);
1566         }
1567
1568         $myconv = q("SELECT `author-link`, `author-avatar`, `parent` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `parent` != 0 AND `deleted` = 0 ",
1569                 dbesc($parent_item['uri']),
1570                 intval($importer['uid'])
1571         );
1572
1573         if(count($myconv)) {
1574                 $importer_url = $a->get_baseurl() . '/profile/' . $importer['nickname'];
1575
1576                 foreach($myconv as $conv) {
1577
1578                         // now if we find a match, it means we're in this conversation
1579
1580                         if(! link_compare($conv['author-link'],$importer_url))
1581                                 continue;
1582
1583                         require_once('include/enotify.php');
1584
1585                         $conv_parent = $conv['parent'];
1586
1587                         notification(array(
1588                                 'type'         => NOTIFY_COMMENT,
1589                                 'notify_flags' => $importer['notify-flags'],
1590                                 'language'     => $importer['language'],
1591                                 'to_name'      => $importer['username'],
1592                                 'to_email'     => $importer['email'],
1593                                 'uid'          => $importer['uid'],
1594                                 'item'         => $datarray,
1595                                 'link'             => $a->get_baseurl().'/display/'.urlencode($datarray['guid']),
1596                                 'source_name'  => $datarray['author-name'],
1597                                 'source_link'  => $datarray['author-link'],
1598                                 'source_photo' => $datarray['author-avatar'],
1599                                 'verb'         => ACTIVITY_POST,
1600                                 'otype'        => 'item',
1601                                 'parent'       => $conv_parent,
1602                                 'parent_uri'   => $parent_uri
1603                         ));
1604
1605                         // only send one notification
1606                         break;
1607                 }
1608         }
1609         return;
1610 }
1611
1612
1613
1614
1615 function diaspora_conversation($importer,$xml,$msg) {
1616
1617         $a = get_app();
1618
1619         $guid = notags(unxmlify($xml->guid));
1620         $subject = notags(unxmlify($xml->subject));
1621         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1622         $participant_handles = notags(unxmlify($xml->participant_handles));
1623         $created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
1624
1625         $parent_uri = $diaspora_handle . ':' . $guid;
1626
1627         $messages = $xml->message;
1628
1629         if(! count($messages)) {
1630                 logger('diaspora_conversation: empty conversation');
1631                 return;
1632         }
1633
1634         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1635         if(! $contact) {
1636                 logger('diaspora_conversation: cannot find contact: ' . $msg['author']);
1637                 return;
1638         }
1639
1640         if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
1641                 logger('diaspora_conversation: Ignoring this author.');
1642                 return 202;
1643         }
1644
1645         $conversation = null;
1646
1647         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
1648                 intval($importer['uid']),
1649                 dbesc($guid)
1650         );
1651         if(count($c))
1652                 $conversation = $c[0];
1653         else {
1654                 $r = q("insert into conv (uid,guid,creator,created,updated,subject,recips) values(%d, '%s', '%s', '%s', '%s', '%s', '%s') ",
1655                         intval($importer['uid']),
1656                         dbesc($guid),
1657                         dbesc($diaspora_handle),
1658                         dbesc(datetime_convert('UTC','UTC',$created_at)),
1659                         dbesc(datetime_convert()),
1660                         dbesc($subject),
1661                         dbesc($participant_handles)
1662                 );
1663                 if($r)
1664                         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
1665                 intval($importer['uid']),
1666             dbesc($guid)
1667         );
1668             if(count($c))
1669             $conversation = $c[0];
1670         }
1671         if(! $conversation) {
1672                 logger('diaspora_conversation: unable to create conversation.');
1673                 return;
1674         }
1675
1676         foreach($messages as $mesg) {
1677
1678                 $reply = 0;
1679
1680                 $msg_guid = notags(unxmlify($mesg->guid));
1681                 $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
1682                 $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
1683                 $msg_author_signature = notags(unxmlify($mesg->author_signature));
1684                 $msg_text = unxmlify($mesg->text);
1685                 $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($mesg->created_at)));
1686                 $msg_diaspora_handle = notags(unxmlify($mesg->diaspora_handle));
1687                 $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
1688                 if($msg_conversation_guid != $guid) {
1689                         logger('diaspora_conversation: message conversation guid does not belong to the current conversation. ' . $xml);
1690                         continue;
1691                 }
1692
1693                 $body = diaspora2bb($msg_text);
1694                 $message_id = $msg_diaspora_handle . ':' . $msg_guid;
1695
1696                 $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
1697
1698                 $author_signature = base64_decode($msg_author_signature);
1699
1700                 if(strcasecmp($msg_diaspora_handle,$msg['author']) == 0) {
1701                         $person = $contact;
1702                         $key = $msg['key'];
1703                 }
1704                 else {
1705                         $person = find_diaspora_person_by_handle($msg_diaspora_handle);
1706
1707                         if(is_array($person) && x($person,'pubkey'))
1708                                 $key = $person['pubkey'];
1709                         else {
1710                                 logger('diaspora_conversation: unable to find author details');
1711                                 continue;
1712                         }
1713                 }
1714
1715                 if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
1716                         logger('diaspora_conversation: verification failed.');
1717                         continue;
1718                 }
1719
1720                 if($msg_parent_author_signature) {
1721                         $owner_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
1722
1723                         $parent_author_signature = base64_decode($msg_parent_author_signature);
1724
1725                         $key = $msg['key'];
1726
1727                         if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
1728                                 logger('diaspora_conversation: owner verification failed.');
1729                                 continue;
1730                         }
1731                 }
1732
1733                 $r = q("select id from mail where `uri` = '%s' limit 1",
1734                         dbesc($message_id)
1735                 );
1736                 if(count($r)) {
1737                         logger('diaspora_conversation: duplicate message already delivered.', LOGGER_DEBUG);
1738                         continue;
1739                 }
1740
1741                 q("insert into mail ( `uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) values ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
1742                         intval($importer['uid']),
1743                         dbesc($msg_guid),
1744                         intval($conversation['id']),
1745                         dbesc($person['name']),
1746                         dbesc($person['photo']),
1747                         dbesc($person['url']),
1748                         intval($contact['id']),
1749                         dbesc($subject),
1750                         dbesc($body),
1751                         0,
1752                         0,
1753                         dbesc($message_id),
1754                         dbesc($parent_uri),
1755                         dbesc($msg_created_at)
1756                 );
1757
1758                 q("update conv set updated = '%s' where id = %d",
1759                         dbesc(datetime_convert()),
1760                         intval($conversation['id'])
1761                 );
1762
1763                 require_once('include/enotify.php');
1764                 notification(array(
1765                         'type' => NOTIFY_MAIL,
1766                         'notify_flags' => $importer['notify-flags'],
1767                         'language' => $importer['language'],
1768                         'to_name' => $importer['username'],
1769                         'to_email' => $importer['email'],
1770                         'uid' =>$importer['importer_uid'],
1771                         'item' => array('subject' => $subject, 'body' => $body),
1772                         'source_name' => $person['name'],
1773                         'source_link' => $person['url'],
1774                         'source_photo' => $person['thumb'],
1775                         'verb' => ACTIVITY_POST,
1776                         'otype' => 'mail'
1777                 ));
1778         }
1779
1780         return;
1781 }
1782
1783 function diaspora_message($importer,$xml,$msg) {
1784
1785         $a = get_app();
1786
1787         $msg_guid = notags(unxmlify($xml->guid));
1788         $msg_parent_guid = notags(unxmlify($xml->parent_guid));
1789         $msg_parent_author_signature = notags(unxmlify($xml->parent_author_signature));
1790         $msg_author_signature = notags(unxmlify($xml->author_signature));
1791         $msg_text = unxmlify($xml->text);
1792         $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
1793         $msg_diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1794         $msg_conversation_guid = notags(unxmlify($xml->conversation_guid));
1795
1796         $parent_uri = $diaspora_handle . ':' . $msg_parent_guid;
1797
1798         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg_diaspora_handle);
1799         if(! $contact) {
1800                 logger('diaspora_message: cannot find contact: ' . $msg_diaspora_handle);
1801                 return;
1802         }
1803
1804         if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
1805                 logger('diaspora_message: Ignoring this author.');
1806                 return 202;
1807         }
1808
1809         $conversation = null;
1810
1811         $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
1812                 intval($importer['uid']),
1813                 dbesc($msg_conversation_guid)
1814         );
1815         if(count($c))
1816                 $conversation = $c[0];
1817         else {
1818                 logger('diaspora_message: conversation not available.');
1819                 return;
1820         }
1821
1822         $reply = 0;
1823
1824         $body = diaspora2bb($msg_text);
1825         $message_id = $msg_diaspora_handle . ':' . $msg_guid;
1826
1827         $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($xml->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
1828
1829
1830         $author_signature = base64_decode($msg_author_signature);
1831
1832         $person = find_diaspora_person_by_handle($msg_diaspora_handle);
1833         if(is_array($person) && x($person,'pubkey'))
1834                 $key = $person['pubkey'];
1835         else {
1836                 logger('diaspora_message: unable to find author details');
1837                 return;
1838         }
1839
1840         if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
1841                 logger('diaspora_message: verification failed.');
1842                 return;
1843         }
1844
1845         $r = q("select id from mail where `uri` = '%s' and uid = %d limit 1",
1846                 dbesc($message_id),
1847                 intval($importer['uid'])
1848         );
1849         if(count($r)) {
1850                 logger('diaspora_message: duplicate message already delivered.', LOGGER_DEBUG);
1851                 return;
1852         }
1853
1854         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')",
1855                 intval($importer['uid']),
1856                 dbesc($msg_guid),
1857                 intval($conversation['id']),
1858                 dbesc($person['name']),
1859                 dbesc($person['photo']),
1860                 dbesc($person['url']),
1861                 intval($contact['id']),
1862                 dbesc($conversation['subject']),
1863                 dbesc($body),
1864                 0,
1865                 1,
1866                 dbesc($message_id),
1867                 dbesc($parent_uri),
1868                 dbesc($msg_created_at)
1869         );
1870
1871         q("update conv set updated = '%s' where id = %d",
1872                 dbesc(datetime_convert()),
1873                 intval($conversation['id'])
1874         );
1875
1876         return;
1877 }
1878
1879
1880 function diaspora_photo($importer,$xml,$msg,$attempt=1) {
1881
1882         $a = get_app();
1883
1884         logger('diaspora_photo: init',LOGGER_DEBUG);
1885
1886         $remote_photo_path = notags(unxmlify($xml->remote_photo_path));
1887
1888         $remote_photo_name = notags(unxmlify($xml->remote_photo_name));
1889
1890         $status_message_guid = notags(unxmlify($xml->status_message_guid));
1891
1892         $guid = notags(unxmlify($xml->guid));
1893
1894         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1895
1896         $public = notags(unxmlify($xml->public));
1897
1898         $created_at = notags(unxmlify($xml_created_at));
1899
1900         logger('diaspora_photo: status_message_guid: ' . $status_message_guid, LOGGER_DEBUG);
1901
1902         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1903         if(! $contact) {
1904                 logger('diaspora_photo: contact record not found: ' . $msg['author'] . ' handle: ' . $diaspora_handle);
1905                 return;
1906         }
1907
1908         if(! diaspora_post_allow($importer,$contact)) {
1909                 logger('diaspora_photo: Ignoring this author.');
1910                 return 202;
1911         }
1912
1913         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1914                 intval($importer['uid']),
1915                 dbesc($status_message_guid)
1916         );
1917         if(! count($r)) {
1918                 if($attempt <= 3) {
1919                         q("INSERT INTO dsprphotoq (uid, msg, attempt) VALUES (%d, '%s', %d)",
1920                            intval($importer['uid']),
1921                            dbesc(serialize($msg)),
1922                            intval($attempt + 1)
1923                         );
1924                 }
1925                 logger('diaspora_photo: attempt = ' . $attempt . '; status message not found: ' . $status_message_guid . ' for photo: ' . $guid);
1926                 return;
1927         }
1928
1929         $parent_item = $r[0];
1930
1931         $link_text = '[img]' . $remote_photo_path . $remote_photo_name . '[/img]' . "\n";
1932
1933         $link_text = scale_external_images($link_text, true,
1934                                            array($remote_photo_name, 'scaled_full_' . $remote_photo_name));
1935
1936         if(strpos($parent_item['body'],$link_text) === false) {
1937                 $r = q("update item set `body` = '%s', `visible` = 1 where `id` = %d and `uid` = %d",
1938                         dbesc($link_text . $parent_item['body']),
1939                         intval($parent_item['id']),
1940                         intval($parent_item['uid'])
1941                 );
1942         }
1943
1944         return;
1945 }
1946
1947
1948
1949
1950 function diaspora_like($importer,$xml,$msg) {
1951
1952         $a = get_app();
1953         $guid = notags(unxmlify($xml->guid));
1954         $parent_guid = notags(unxmlify($xml->parent_guid));
1955         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
1956         $target_type = notags(unxmlify($xml->target_type));
1957         $positive = notags(unxmlify($xml->positive));
1958         $author_signature = notags(unxmlify($xml->author_signature));
1959
1960         $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
1961
1962         // likes on comments not supported here and likes on photos not supported by Diaspora
1963
1964 //      if($target_type !== 'Post')
1965 //              return;
1966
1967         $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
1968         if(! $contact) {
1969                 logger('diaspora_like: cannot find contact: ' . $msg['author']);
1970                 return;
1971         }
1972
1973         if(! diaspora_post_allow($importer,$contact)) {
1974                 logger('diaspora_like: Ignoring this author.');
1975                 return 202;
1976         }
1977
1978         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1979                 intval($importer['uid']),
1980                 dbesc($parent_guid)
1981         );
1982         if(! count($r)) {
1983                 logger('diaspora_like: parent item not found: ' . $guid);
1984                 return;
1985         }
1986
1987         $parent_item = $r[0];
1988
1989         $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
1990                 intval($importer['uid']),
1991                 dbesc($guid)
1992         );
1993         if(count($r)) {
1994                 if($positive === 'true') {
1995                         logger('diaspora_like: duplicate like: ' . $guid);
1996                         return;
1997                 }
1998                 // Note: I don't think "Like" objects with positive = "false" are ever actually used
1999                 // It looks like "RelayableRetractions" are used for "unlike" instead
2000                 if($positive === 'false') {
2001                         logger('diaspora_like: received a like with positive set to "false"...ignoring');
2002 /*                      q("UPDATE `item` SET `deleted` = 1 WHERE `id` = %d AND `uid` = %d",
2003                                 intval($r[0]['id']),
2004                                 intval($importer['uid'])
2005                         );*/
2006                         // FIXME--actually don't unless it turns out that Diaspora does indeed send out "false" likes
2007                         //  send notification via proc_run()
2008                         return;
2009                 }
2010         }
2011         // Note: I don't think "Like" objects with positive = "false" are ever actually used
2012         // It looks like "RelayableRetractions" are used for "unlike" instead
2013         if($positive === 'false') {
2014                 logger('diaspora_like: received a like with positive set to "false"');
2015                 logger('diaspora_like: unlike received with no corresponding like...ignoring');
2016                 return;
2017         }
2018
2019
2020         /* How Diaspora performs "like" signature checking:
2021
2022            - If an item has been sent by the like author to the top-level post owner to relay on
2023              to the rest of the contacts on the top-level post, the top-level post owner should check
2024              the author_signature, then create a parent_author_signature before relaying the like on
2025            - If an item has been relayed on by the top-level post owner, the contacts who receive it
2026              check only the parent_author_signature. Basically, they trust that the top-level post
2027              owner has already verified the authenticity of anything he/she sends out
2028            - In either case, the signature that get checked is the signature created by the person
2029              who sent the salmon
2030         */
2031
2032         $signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
2033         $key = $msg['key'];
2034
2035         if($parent_author_signature) {
2036                 // If a parent_author_signature exists, then we've received the like
2037                 // relayed from the top-level post owner. There's no need to check the
2038                 // author_signature if the parent_author_signature is valid
2039
2040                 $parent_author_signature = base64_decode($parent_author_signature);
2041
2042                 if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
2043                         if (intval(get_config('system','ignore_diaspora_like_signature')))
2044                                 logger('diaspora_like: top-level owner verification failed. Proceeding anyway.');
2045                         else {
2046                                 logger('diaspora_like: top-level owner verification failed.');
2047                                 return;
2048                         }
2049                 }
2050         }
2051         else {
2052                 // If there's no parent_author_signature, then we've received the like
2053                 // from the like creator. In that case, the person is "like"ing
2054                 // our post, so he/she must be a contact of ours and his/her public key
2055                 // should be in $msg['key']
2056
2057                 $author_signature = base64_decode($author_signature);
2058
2059                 if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
2060                         if (intval(get_config('system','ignore_diaspora_like_signature')))
2061                                 logger('diaspora_like: like creator verification failed. Proceeding anyway');
2062                         else {
2063                                 logger('diaspora_like: like creator verification failed.');
2064                                 return;
2065                         }
2066                 }
2067         }
2068
2069         // Phew! Everything checks out. Now create an item.
2070
2071         // Find the original comment author information.
2072         // We need this to make sure we display the comment author
2073         // information (name and avatar) correctly.
2074         if(strcasecmp($diaspora_handle,$msg['author']) == 0)
2075                 $person = $contact;
2076         else {
2077                 $person = find_diaspora_person_by_handle($diaspora_handle);
2078
2079                 if(! is_array($person)) {
2080                         logger('diaspora_like: unable to find author details');
2081                         return;
2082                 }
2083         }
2084
2085         $uri = $diaspora_handle . ':' . $guid;
2086
2087         $activity = ACTIVITY_LIKE;
2088         $post_type = (($parent_item['resource-id']) ? t('photo') : t('status'));
2089         $objtype = (($parent_item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
2090         $link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . '" />' . "\n") ;
2091         $body = $parent_item['body'];
2092
2093         $obj = <<< EOT
2094
2095         <object>
2096                 <type>$objtype</type>
2097                 <local>1</local>
2098                 <id>{$parent_item['uri']}</id>
2099                 <link>$link</link>
2100                 <title></title>
2101                 <content>$body</content>
2102         </object>
2103 EOT;
2104         $bodyverb = t('%1$s likes %2$s\'s %3$s');
2105
2106         $arr = array();
2107
2108         $arr['uri'] = $uri;
2109         $arr['uid'] = $importer['uid'];
2110         $arr['guid'] = $guid;
2111         $arr['network']  = NETWORK_DIASPORA;
2112         $arr['contact-id'] = $contact['id'];
2113         $arr['type'] = 'activity';
2114         $arr['wall'] = $parent_item['wall'];
2115         $arr['gravity'] = GRAVITY_LIKE;
2116         $arr['parent'] = $parent_item['id'];
2117         $arr['parent-uri'] = $parent_item['uri'];
2118
2119         $arr['owner-name'] = $parent_item['name'];
2120         $arr['owner-link'] = $parent_item['url'];
2121         //$arr['owner-avatar'] = $parent_item['thumb'];
2122         $arr['owner-avatar'] = ((x($parent_item,'thumb')) ? $parent_item['thumb'] : $parent_item['photo']);
2123
2124         $arr['author-name'] = $person['name'];
2125         $arr['author-link'] = $person['url'];
2126         $arr['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
2127
2128         $ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
2129         $alink = '[url=' . $parent_item['author-link'] . ']' . $parent_item['author-name'] . '[/url]';
2130         //$plink = '[url=' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . ']' . $post_type . '[/url]';
2131         $plink = '[url='.$a->get_baseurl().'/display/'.urlencode($guid).']'.$post_type.'[/url]';
2132         $arr['body'] =  sprintf( $bodyverb, $ulink, $alink, $plink );
2133
2134         $arr['app']  = 'Diaspora';
2135
2136         $arr['private'] = $parent_item['private'];
2137         $arr['verb'] = $activity;
2138         $arr['object-type'] = $objtype;
2139         $arr['object'] = $obj;
2140         $arr['visible'] = 1;
2141         $arr['unseen'] = 1;
2142         $arr['last-child'] = 0;
2143
2144         $message_id = item_store($arr);
2145
2146
2147         //if($message_id) {
2148         //      q("update item set plink = '%s' where id = %d",
2149         //              //dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
2150         //              dbesc($a->get_baseurl().'/display/'.$guid),
2151         //              intval($message_id)
2152         //      );
2153         //}
2154
2155         if(! $parent_author_signature) {
2156                 q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
2157                         intval($message_id),
2158                         dbesc($signed_data),
2159                         dbesc(base64_encode($author_signature)),
2160                         dbesc($diaspora_handle)
2161                 );
2162         }
2163
2164         // if the message isn't already being relayed, notify others
2165         // the existence of parent_author_signature means the parent_author or owner
2166         // is already relaying. The parent_item['origin'] indicates the message was created on our system
2167
2168         if(($parent_item['origin']) && (! $parent_author_signature))
2169                 proc_run('php','include/notifier.php','comment-import',$message_id);
2170
2171         return;
2172 }
2173
2174 function diaspora_retraction($importer,$xml) {
2175
2176
2177         $guid = notags(unxmlify($xml->guid));
2178         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
2179         $type = notags(unxmlify($xml->type));
2180
2181         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
2182         if(! $contact)
2183                 return;
2184
2185         if($type === 'Person') {
2186                 require_once('include/Contact.php');
2187                 contact_remove($contact['id']);
2188         }
2189         elseif($type === 'Post') {
2190                 $r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
2191                         dbesc('guid'),
2192                         intval($importer['uid'])
2193                 );
2194                 if(count($r)) {
2195                         if(link_compare($r[0]['author-link'],$contact['url'])) {
2196                                 q("update item set `deleted` = 1, `changed` = '%s' where `id` = %d",
2197                                         dbesc(datetime_convert()),
2198                                         intval($r[0]['id'])
2199                                 );
2200                                 delete_thread($r[0]['id'], $r[0]['parent-uri']);
2201                         }
2202                 }
2203         }
2204
2205         return 202;
2206         // NOTREACHED
2207 }
2208
2209 function diaspora_signed_retraction($importer,$xml,$msg) {
2210
2211
2212         $guid = notags(unxmlify($xml->target_guid));
2213         $diaspora_handle = notags(unxmlify($xml->sender_handle));
2214         $type = notags(unxmlify($xml->target_type));
2215         $sig = notags(unxmlify($xml->target_author_signature));
2216
2217         $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
2218
2219         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
2220         if(! $contact) {
2221                 logger('diaspora_signed_retraction: no contact ' . $diaspora_handle . ' for ' . $importer['uid']);
2222                 return;
2223         }
2224
2225
2226         $signed_data = $guid . ';' . $type ;
2227         $key = $msg['key'];
2228
2229         /* How Diaspora performs relayable_retraction signature checking:
2230
2231            - If an item has been sent by the item author to the top-level post owner to relay on
2232              to the rest of the contacts on the top-level post, the top-level post owner checks
2233              the author_signature, then creates a parent_author_signature before relaying the item on
2234            - If an item has been relayed on by the top-level post owner, the contacts who receive it
2235              check only the parent_author_signature. Basically, they trust that the top-level post
2236              owner has already verified the authenticity of anything he/she sends out
2237            - In either case, the signature that get checked is the signature created by the person
2238              who sent the salmon
2239         */
2240
2241         if($parent_author_signature) {
2242
2243                 $parent_author_signature = base64_decode($parent_author_signature);
2244
2245                 if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
2246                         logger('diaspora_signed_retraction: top-level post owner verification failed');
2247                         return;
2248                 }
2249
2250         }
2251         else {
2252
2253                 $sig_decode = base64_decode($sig);
2254
2255                 if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
2256                         logger('diaspora_signed_retraction: retraction owner verification failed.' . print_r($msg,true));
2257                         return;
2258                 }
2259         }
2260
2261         if($type === 'StatusMessage' || $type === 'Comment' || $type === 'Like') {
2262                 $r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
2263                         dbesc($guid),
2264                         intval($importer['uid'])
2265                 );
2266                 if(count($r)) {
2267                         if(link_compare($r[0]['author-link'],$contact['url'])) {
2268                                 q("update item set `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' where `id` = %d",
2269                                         dbesc(datetime_convert()),
2270                                         dbesc(datetime_convert()),
2271                                         intval($r[0]['id'])
2272                                 );
2273                                 delete_thread($r[0]['id'], $r[0]['parent-uri']);
2274
2275                                 // Now check if the retraction needs to be relayed by us
2276                                 //
2277                                 // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
2278                                 // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
2279                                 // The only item with `parent` and `id` as the parent id is the parent item.
2280                                 $p = q("select origin from item where parent = %d and id = %d limit 1",
2281                                         $r[0]['parent'],
2282                                         $r[0]['parent']
2283                                 );
2284                                 if(count($p)) {
2285                                         if(($p[0]['origin']) && (! $parent_author_signature)) {
2286                                                 q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
2287                                                         $r[0]['id'],
2288                                                         dbesc($signed_data),
2289                                                         dbesc($sig),
2290                                                         dbesc($diaspora_handle)
2291                                                 );
2292
2293                                                 // the existence of parent_author_signature would have meant the parent_author or owner
2294                                                 // is already relaying.
2295                                                 logger('diaspora_signed_retraction: relaying relayable_retraction');
2296
2297                                                 proc_run('php','include/notifier.php','drop',$r[0]['id']);
2298                                         }
2299                                 }
2300                         }
2301                 }
2302         }
2303         else
2304                 logger('diaspora_signed_retraction: unknown type: ' . $type);
2305
2306         return 202;
2307         // NOTREACHED
2308 }
2309
2310 function diaspora_profile($importer,$xml,$msg) {
2311
2312         $a = get_app();
2313         $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
2314
2315
2316         if($diaspora_handle != $msg['author']) {
2317                 logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
2318                 return 202;
2319         }
2320
2321         $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
2322         if(! $contact)
2323                 return;
2324
2325         if($contact['blocked']) {
2326                 logger('diaspora_post: Ignoring this author.');
2327                 return 202;
2328         }
2329
2330         $name = unxmlify($xml->first_name) . ((strlen($xml->last_name)) ? ' ' . unxmlify($xml->last_name) : '');
2331         $image_url = unxmlify($xml->image_url);
2332         $birthday = unxmlify($xml->birthday);
2333         $location = diaspora2bb(unxmlify($xml->location));
2334         $about = diaspora2bb(unxmlify($xml->bio));
2335         $gender = unxmlify($xml->gender);
2336         $tags = unxmlify($xml->tag_string);
2337
2338         $tags = explode("#", $tags);
2339
2340         $keywords = array();
2341         foreach ($tags as $tag) {
2342                 $tag = trim(strtolower($tag));
2343                 if ($tag != "")
2344                         $keywords[] = $tag;
2345         }
2346
2347         $keywords = implode(", ", $keywords);
2348
2349         $handle_parts = explode("@", $diaspora_handle);
2350         if($name === '') {
2351                 $name = $handle_parts[0];
2352         }
2353
2354         if( preg_match("|^https?://|", $image_url) === 0) {
2355                 $image_url = "http://" . $handle_parts[1] . $image_url;
2356         }
2357
2358 /*      $r = q("SELECT DISTINCT ( `resource-id` ) FROM `photo` WHERE  `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' ",
2359                 intval($importer['uid']),
2360                 intval($contact['id'])
2361         );
2362         $oldphotos = ((count($r)) ? $r : null);*/
2363
2364         require_once('include/Photo.php');
2365
2366         $images = import_profile_photo($image_url,$importer['uid'],$contact['id']);
2367
2368         // Generic birthday. We don't know the timezone. The year is irrelevant.
2369
2370         $birthday = str_replace('1000','1901',$birthday);
2371
2372         $birthday = datetime_convert('UTC','UTC',$birthday,'Y-m-d');
2373
2374         // this is to prevent multiple birthday notifications in a single year
2375         // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
2376
2377         if(substr($birthday,5) === substr($contact['bd'],5))
2378                 $birthday = $contact['bd'];
2379
2380         // TODO: update name on item['author-name'] if the name changed. See consume_feed()
2381         // Not doing this currently because D* protocol is scheduled for revision soon.
2382
2383         $r = q("UPDATE `contact` SET `name` = '%s', `name-date` = '%s', `photo` = '%s', `thumb` = '%s', `micro` = '%s', `avatar-date` = '%s' , `bd` = '%s', `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
2384                 dbesc($name),
2385                 dbesc(datetime_convert()),
2386                 dbesc($images[0]),
2387                 dbesc($images[1]),
2388                 dbesc($images[2]),
2389                 dbesc(datetime_convert()),
2390                 dbesc($birthday),
2391                 dbesc($location),
2392                 dbesc($about),
2393                 dbesc($keywords),
2394                 dbesc($gender),
2395                 intval($contact['id']),
2396                 intval($importer['uid'])
2397         );
2398
2399         if (unxmlify($xml->searchable) == "true") {
2400                 require_once('include/socgraph.php');
2401                 poco_check($contact['url'], $name, NETWORK_DIASPORA, $images[0], $about, $location, $gender, $keywords, "",
2402                         datetime_convert(), $contact['id'], $importer['uid']);
2403         }
2404
2405         $profileurl = "";
2406         $author = q("SELECT * FROM `unique_contacts` WHERE `url`='%s' LIMIT 1",
2407                         dbesc(normalise_link($contact['url'])));
2408
2409         if (count($author) == 0) {
2410                 q("INSERT INTO `unique_contacts` (`url`, `name`, `avatar`, `location`, `about`) VALUES ('%s', '%s', '%s', '%s', '%s')",
2411                         dbesc(normalise_link($contact['url'])), dbesc($name), dbesc($location), dbesc($about), dbesc($images[0]));
2412
2413                 $author = q("SELECT id FROM unique_contacts WHERE url='%s' LIMIT 1",
2414                         dbesc(normalise_link($contact['url'])));
2415         } else if (normalise_link($contact['url']).$name.$location.$about != normalise_link($author[0]["url"]).$author[0]["name"].$author[0]["location"].$author[0]["about"]) {
2416                 q("UPDATE unique_contacts SET name = '%s', avatar = '%s', `location` = '%s', `about` = '%s' WHERE url = '%s'",
2417                 dbesc($name), dbesc($images[0]), dbesc($location), dbesc($about), dbesc(normalise_link($contact['url'])));
2418         }
2419
2420 /*      if($r) {
2421                 if($oldphotos) {
2422                         foreach($oldphotos as $ph) {
2423                                 q("DELETE FROM `photo` WHERE `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' AND `resource-id` = '%s' ",
2424                                         intval($importer['uid']),
2425                                         intval($contact['id']),
2426                                         dbesc($ph['resource-id'])
2427                                 );
2428                         }
2429                 }
2430         }       */
2431
2432         return;
2433
2434 }
2435
2436 function diaspora_share($me,$contact) {
2437         $a = get_app();
2438         $myaddr = $me['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2439         $theiraddr = $contact['addr'];
2440
2441         $tpl = get_markup_template('diaspora_share.tpl');
2442         $msg = replace_macros($tpl, array(
2443                 '$sender' => $myaddr,
2444                 '$recipient' => $theiraddr
2445         ));
2446
2447         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
2448         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey']));
2449
2450         return(diaspora_transmit($owner,$contact,$slap, false));
2451 }
2452
2453 function diaspora_unshare($me,$contact) {
2454
2455         $a = get_app();
2456         $myaddr = $me['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2457
2458         $tpl = get_markup_template('diaspora_retract.tpl');
2459         $msg = replace_macros($tpl, array(
2460                 '$guid'   => $me['guid'],
2461                 '$type'   => 'Person',
2462                 '$handle' => $myaddr
2463         ));
2464
2465         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
2466         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey']));
2467
2468         return(diaspora_transmit($owner,$contact,$slap, false));
2469
2470 }
2471
2472
2473 function diaspora_send_status($item,$owner,$contact,$public_batch = false) {
2474
2475         $a = get_app();
2476         $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2477         $theiraddr = $contact['addr'];
2478
2479         $images = array();
2480
2481         $title = $item['title'];
2482         $body = $item['body'];
2483
2484 /*
2485         // We're trying to match Diaspora's split message/photo protocol but
2486         // all the photos are displayed on D* as links and not img's - even
2487         // though we're sending pretty much precisely what they send us when
2488         // doing the same operation.
2489         // Commented out for now, we'll use bb2diaspora to convert photos to markdown
2490         // which seems to get through intact.
2491
2492         $cnt = preg_match_all('|\[img\](.*?)\[\/img\]|',$body,$matches,PREG_SET_ORDER);
2493         if($cnt) {
2494                 foreach($matches as $mtch) {
2495                         $detail = array();
2496                         $detail['str'] = $mtch[0];
2497                         $detail['path'] = dirname($mtch[1]) . '/';
2498                         $detail['file'] = basename($mtch[1]);
2499                         $detail['guid'] = $item['guid'];
2500                         $detail['handle'] = $myaddr;
2501                         $images[] = $detail;
2502                         $body = str_replace($detail['str'],$mtch[1],$body);
2503                 }
2504         }
2505 */
2506
2507         //if(strlen($title))
2508         //      $body = "[b]".html_entity_decode($title)."[/b]\n\n".$body;
2509
2510         // convert to markdown
2511         $body = xmlify(html_entity_decode(bb2diaspora($body)));
2512         //$body = bb2diaspora($body);
2513
2514         // Adding the title
2515         if(strlen($title))
2516                 $body = "## ".html_entity_decode($title)."\n\n".$body;
2517
2518         if($item['attach']) {
2519                 $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism',$item['attach'],$matches,PREG_SET_ORDER);
2520                 if(cnt) {
2521                         $body .= "\n" . t('Attachments:') . "\n";
2522                         foreach($matches as $mtch) {
2523                                 $body .= '[' . $mtch[3] . '](' . $mtch[1] . ')' . "\n";
2524                         }
2525                 }
2526         }
2527
2528
2529         $public = (($item['private']) ? 'false' : 'true');
2530
2531         require_once('include/datetime.php');
2532         $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
2533
2534         // Detect a share element and do a reshare
2535         // see: https://github.com/Raven24/diaspora-federation/blob/master/lib/diaspora-federation/entities/reshare.rb
2536         if (!$item['private'] AND ($ret = diaspora_is_reshare($item["body"]))) {
2537                 $tpl = get_markup_template('diaspora_reshare.tpl');
2538                 $msg = replace_macros($tpl, array(
2539                         '$root_handle' => xmlify($ret['root_handle']),
2540                         '$root_guid' => $ret['root_guid'],
2541                         '$guid' => $item['guid'],
2542                         '$handle' => xmlify($myaddr),
2543                         '$public' => $public,
2544                         '$created' => $created,
2545                         '$provider' => $item["app"]
2546                 ));
2547         } else {
2548                 $tpl = get_markup_template('diaspora_post.tpl');
2549                 $msg = replace_macros($tpl, array(
2550                         '$body' => $body,
2551                         '$guid' => $item['guid'],
2552                         '$handle' => xmlify($myaddr),
2553                         '$public' => $public,
2554                         '$created' => $created,
2555                         '$provider' => $item["app"]
2556                 ));
2557         }
2558
2559         logger('diaspora_send_status: '.$owner['username'].' -> '.$contact['name'].' base message: '.$msg, LOGGER_DATA);
2560
2561         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2562         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2563
2564         $return_code = diaspora_transmit($owner,$contact,$slap,$public_batch);
2565
2566         logger('diaspora_send_status: guid: '.$item['guid'].' result '.$return_code, LOGGER_DEBUG);
2567
2568         if(count($images)) {
2569                 diaspora_send_images($item,$owner,$contact,$images,$public_batch);
2570         }
2571
2572         return $return_code;
2573 }
2574
2575 function diaspora_is_reshare($body) {
2576         $body = trim($body);
2577
2578         // Skip if it isn't a pure repeated messages
2579         // Does it start with a share?
2580         if (strpos($body, "[share") > 0)
2581                 return(false);
2582
2583         // Does it end with a share?
2584         if (strlen($body) > (strrpos($body, "[/share]") + 8))
2585                 return(false);
2586
2587         $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
2588         // Skip if there is no shared message in there
2589         if ($body == $attributes)
2590                 return(false);
2591
2592         $profile = "";
2593         preg_match("/profile='(.*?)'/ism", $attributes, $matches);
2594         if ($matches[1] != "")
2595                 $profile = $matches[1];
2596
2597         preg_match('/profile="(.*?)"/ism', $attributes, $matches);
2598         if ($matches[1] != "")
2599                 $profile = $matches[1];
2600
2601         $ret= array();
2602
2603         $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
2604         if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
2605                 return(false);
2606
2607         $link = "";
2608         preg_match("/link='(.*?)'/ism", $attributes, $matches);
2609         if ($matches[1] != "")
2610                 $link = $matches[1];
2611
2612         preg_match('/link="(.*?)"/ism', $attributes, $matches);
2613         if ($matches[1] != "")
2614                 $link = $matches[1];
2615
2616         $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
2617         if (($ret["root_guid"] == $link) OR ($ret["root_guid"] == ""))
2618                 return(false);
2619
2620         return($ret);
2621 }
2622
2623 function diaspora_send_images($item,$owner,$contact,$images,$public_batch = false) {
2624         $a = get_app();
2625         if(! count($images))
2626                 return;
2627         $mysite = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://') + 3) . '/photo';
2628
2629         $tpl = get_markup_template('diaspora_photo.tpl');
2630         foreach($images as $image) {
2631                 if(! stristr($image['path'],$mysite))
2632                         continue;
2633                 $resource = str_replace('.jpg','',$image['file']);
2634                 $resource = substr($resource,0,strpos($resource,'-'));
2635
2636                 $r = q("select * from photo where `resource-id` = '%s' and `uid` = %d limit 1",
2637                         dbesc($resource),
2638                         intval($owner['uid'])
2639                 );
2640                 if(! count($r))
2641                         continue;
2642                 $public = (($r[0]['allow_cid'] || $r[0]['allow_gid'] || $r[0]['deny_cid'] || $r[0]['deny_gid']) ? 'false' : 'true' );
2643                 $msg = replace_macros($tpl,array(
2644                         '$path' => xmlify($image['path']),
2645                         '$filename' => xmlify($image['file']),
2646                         '$msg_guid' => xmlify($image['guid']),
2647                         '$guid' => xmlify($r[0]['guid']),
2648                         '$handle' => xmlify($image['handle']),
2649                         '$public' => xmlify($public),
2650                         '$created_at' => xmlify(datetime_convert('UTC','UTC',$r[0]['created'],'Y-m-d H:i:s \U\T\C'))
2651                 ));
2652
2653
2654                 logger('diaspora_send_photo: base message: ' . $msg, LOGGER_DATA);
2655                 $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2656                 //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2657
2658                 diaspora_transmit($owner,$contact,$slap,$public_batch);
2659         }
2660
2661 }
2662
2663 function diaspora_send_followup($item,$owner,$contact,$public_batch = false) {
2664
2665         $a = get_app();
2666         $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2667 //      $theiraddr = $contact['addr'];
2668
2669         // Diaspora doesn't support threaded comments, but some
2670         // versions of Diaspora (i.e. Diaspora-pistos) support
2671         // likes on comments
2672         if($item['verb'] === ACTIVITY_LIKE && $item['thr-parent']) {
2673                 $p = q("select guid, type, uri, `parent-uri` from item where uri = '%s' limit 1",
2674                         dbesc($item['thr-parent'])
2675                       );
2676         }
2677         else {
2678                 // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
2679                 // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
2680                 // The only item with `parent` and `id` as the parent id is the parent item.
2681                 $p = q("select guid, type, uri, `parent-uri` from item where parent = %d and id = %d limit 1",
2682                         intval($item['parent']),
2683                         intval($item['parent'])
2684                 );
2685         }
2686         if(count($p))
2687                 $parent = $p[0];
2688         else
2689                 return;
2690
2691         if($item['verb'] === ACTIVITY_LIKE) {
2692                 $tpl = get_markup_template('diaspora_like.tpl');
2693                 $like = true;
2694                 $target_type = ( $parent['uri'] === $parent['parent-uri']  ? 'Post' : 'Comment');
2695 //              $target_type = (strpos($parent['type'], 'comment') ? 'Comment' : 'Post');
2696 //              $positive = (($item['deleted']) ? 'false' : 'true');
2697                 $positive = 'true';
2698
2699                 if(($item['deleted']))
2700                         logger('diaspora_send_followup: received deleted "like". Those should go to diaspora_send_retraction');
2701         }
2702         else {
2703                 $tpl = get_markup_template('diaspora_comment.tpl');
2704                 $like = false;
2705         }
2706
2707         $text = html_entity_decode(bb2diaspora($item['body']));
2708
2709         // sign it
2710
2711         if($like)
2712                 $signed_text = $item['guid'] . ';' . $target_type . ';' . $parent['guid'] . ';' . $positive . ';' . $myaddr;
2713         else
2714                 $signed_text = $item['guid'] . ';' . $parent['guid'] . ';' . $text . ';' . $myaddr;
2715
2716         $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
2717
2718         $msg = replace_macros($tpl,array(
2719                 '$guid' => xmlify($item['guid']),
2720                 '$parent_guid' => xmlify($parent['guid']),
2721                 '$target_type' =>xmlify($target_type),
2722                 '$authorsig' => xmlify($authorsig),
2723                 '$body' => xmlify($text),
2724                 '$positive' => xmlify($positive),
2725                 '$handle' => xmlify($myaddr)
2726         ));
2727
2728         logger('diaspora_followup: base message: ' . $msg, LOGGER_DATA);
2729
2730         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2731         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2732
2733         return(diaspora_transmit($owner,$contact,$slap,$public_batch));
2734 }
2735
2736
2737 function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
2738
2739
2740         $a = get_app();
2741         $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2742 //      $theiraddr = $contact['addr'];
2743
2744         $body = $item['body'];
2745         $text = html_entity_decode(bb2diaspora($body));
2746
2747         // Diaspora doesn't support threaded comments, but some
2748         // versions of Diaspora (i.e. Diaspora-pistos) support
2749         // likes on comments
2750         if($item['verb'] === ACTIVITY_LIKE && $item['thr-parent']) {
2751                 $p = q("select guid, type, uri, `parent-uri` from item where uri = '%s' limit 1",
2752                         dbesc($item['thr-parent'])
2753                       );
2754         }
2755         else {
2756                 // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
2757                 // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
2758                 // The only item with `parent` and `id` as the parent id is the parent item.
2759                 $p = q("select guid, type, uri, `parent-uri` from item where parent = %d and id = %d limit 1",
2760                        intval($item['parent']),
2761                        intval($item['parent'])
2762                       );
2763         }
2764         if(count($p))
2765                 $parent = $p[0];
2766         else
2767                 return;
2768
2769         $like = false;
2770         $relay_retract = false;
2771         $sql_sign_id = 'iid';
2772         if( $item['deleted']) {
2773                 $relay_retract = true;
2774
2775                 $target_type = ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
2776
2777                 $sql_sign_id = 'retract_iid';
2778                 $tpl = get_markup_template('diaspora_relayable_retraction.tpl');
2779         }
2780         elseif($item['verb'] === ACTIVITY_LIKE) {
2781                 $like = true;
2782
2783                 $target_type = ( $parent['uri'] === $parent['parent-uri']  ? 'Post' : 'Comment');
2784 //              $positive = (($item['deleted']) ? 'false' : 'true');
2785                 $positive = 'true';
2786
2787                 $tpl = get_markup_template('diaspora_like_relay.tpl');
2788         }
2789         else { // item is a comment
2790                 $tpl = get_markup_template('diaspora_comment_relay.tpl');
2791         }
2792
2793
2794         // fetch the original signature if the relayable was created by a Diaspora
2795         // or DFRN user. Relayables for other networks are not supported.
2796
2797 /*      $r = q("select * from sign where " . $sql_sign_id . " = %d limit 1",
2798                 intval($item['id'])
2799         );
2800         if(count($r)) {
2801                 $orig_sign = $r[0];
2802                 $signed_text = $orig_sign['signed_text'];
2803                 $authorsig = $orig_sign['signature'];
2804                 $handle = $orig_sign['signer'];
2805         }
2806         else {
2807
2808                 // Author signature information (for likes, comments, and retractions of likes or comments,
2809                 // whether from Diaspora or Friendica) must be placed in the `sign` table before this
2810                 // function is called
2811                 logger('diaspora_send_relay: original author signature not found, cannot send relayable');
2812                 return;
2813         }*/
2814
2815         /* Since the author signature is only checked by the parent, not by the relay recipients,
2816          * I think it may not be necessary for us to do so much work to preserve all the original
2817          * signatures. The important thing that Diaspora DOES need is the original creator's handle.
2818          * Let's just generate that and forget about all the original author signature stuff.
2819          *
2820          * Note: this might be more of an problem if we want to support likes on comments for older
2821          * versions of Diaspora (diaspora-pistos), but since there are a number of problems with
2822          * doing that, let's ignore it for now.
2823          *
2824          * Currently, only DFRN contacts are supported. StatusNet shouldn't be hard, but it hasn't
2825          * been done yet
2826          */
2827
2828         $handle = diaspora_handle_from_contact($item['contact-id']);
2829         if(! $handle)
2830                 return;
2831
2832
2833         if($relay_retract)
2834                 $sender_signed_text = $item['guid'] . ';' . $target_type;
2835         elseif($like)
2836                 $sender_signed_text = $item['guid'] . ';' . $target_type . ';' . $parent['guid'] . ';' . $positive . ';' . $handle;
2837         else
2838                 $sender_signed_text = $item['guid'] . ';' . $parent['guid'] . ';' . $text . ';' . $handle;
2839
2840         // Sign the relayable with the top-level owner's signature
2841         //
2842         // We'll use the $sender_signed_text that we just created, instead of the $signed_text
2843         // stored in the database, because that provides the best chance that Diaspora will
2844         // be able to reconstruct the signed text the same way we did. This is particularly a
2845         // concern for the comment, whose signed text includes the text of the comment. The
2846         // smallest change in the text of the comment, including removing whitespace, will
2847         // make the signature verification fail. Since we translate from BB code to Diaspora's
2848         // markup at the top of this function, which is AFTER we placed the original $signed_text
2849         // in the database, it's hazardous to trust the original $signed_text.
2850
2851         $parentauthorsig = base64_encode(rsa_sign($sender_signed_text,$owner['uprvkey'],'sha256'));
2852
2853         $msg = replace_macros($tpl,array(
2854                 '$guid' => xmlify($item['guid']),
2855                 '$parent_guid' => xmlify($parent['guid']),
2856                 '$target_type' =>xmlify($target_type),
2857                 '$authorsig' => xmlify($authorsig),
2858                 '$parentsig' => xmlify($parentauthorsig),
2859                 '$body' => xmlify($text),
2860                 '$positive' => xmlify($positive),
2861                 '$handle' => xmlify($handle)
2862         ));
2863
2864         logger('diaspora_send_relay: base message: ' . $msg, LOGGER_DATA);
2865
2866
2867         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2868         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2869
2870         return(diaspora_transmit($owner,$contact,$slap,$public_batch));
2871
2872 }
2873
2874
2875
2876 function diaspora_send_retraction($item,$owner,$contact,$public_batch = false) {
2877
2878         $a = get_app();
2879         $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2880
2881         // Check whether the retraction is for a top-level post or whether it's a relayable
2882         if( $item['uri'] !== $item['parent-uri'] ) {
2883
2884                 $tpl = get_markup_template('diaspora_relay_retraction.tpl');
2885                 $target_type = (($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
2886         }
2887         else {
2888
2889                 $tpl = get_markup_template('diaspora_signed_retract.tpl');
2890                 $target_type = 'StatusMessage';
2891         }
2892
2893         $signed_text = $item['guid'] . ';' . $target_type;
2894
2895         $msg = replace_macros($tpl, array(
2896                 '$guid'   => xmlify($item['guid']),
2897                 '$type'   => xmlify($target_type),
2898                 '$handle' => xmlify($myaddr),
2899                 '$signature' => xmlify(base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')))
2900         ));
2901
2902         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
2903         //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
2904
2905         return(diaspora_transmit($owner,$contact,$slap,$public_batch));
2906 }
2907
2908 function diaspora_send_mail($item,$owner,$contact) {
2909
2910         $a = get_app();
2911         $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
2912
2913         $r = q("select * from conv where id = %d and uid = %d limit 1",
2914                 intval($item['convid']),
2915                 intval($item['uid'])
2916         );
2917
2918         if(! count($r)) {
2919                 logger('diaspora_send_mail: conversation not found.');
2920                 return;
2921         }
2922         $cnv = $r[0];
2923
2924         $conv = array(
2925                 'guid' => xmlify($cnv['guid']),
2926                 'subject' => xmlify($cnv['subject']),
2927                 'created_at' => xmlify(datetime_convert('UTC','UTC',$cnv['created'],'Y-m-d H:i:s \U\T\C')),
2928                 'diaspora_handle' => xmlify($cnv['creator']),
2929                 'participant_handles' => xmlify($cnv['recips'])
2930         );
2931
2932         $body = bb2diaspora($item['body']);
2933         $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
2934
2935         $signed_text =  $item['guid'] . ';' . $cnv['guid'] . ';' . $body .  ';'
2936                 . $created . ';' . $myaddr . ';' . $cnv['guid'];
2937
2938         $sig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
2939
2940         $msg = array(
2941                 'guid' => xmlify($item['guid']),
2942                 'parent_guid' => xmlify($cnv['guid']),
2943                 'parent_author_signature' => (($item['reply']) ? null : xmlify($sig)),
2944                 'author_signature' => xmlify($sig),
2945                 'text' => xmlify($body),
2946                 'created_at' => xmlify($created),
2947                 'diaspora_handle' => xmlify($myaddr),
2948                 'conversation_guid' => xmlify($cnv['guid'])
2949         );
2950
2951         if($item['reply']) {
2952                 $tpl = get_markup_template('diaspora_message.tpl');
2953                 $xmsg = replace_macros($tpl, array('$msg' => $msg));
2954         }
2955         else {
2956                 $conv['messages'] = array($msg);
2957                 $tpl = get_markup_template('diaspora_conversation.tpl');
2958                 $xmsg = replace_macros($tpl, array('$conv' => $conv));
2959         }
2960
2961         logger('diaspora_conversation: ' . print_r($xmsg,true), LOGGER_DATA);
2962
2963         $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],false)));
2964         //$slap = 'xml=' . urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],false));
2965
2966         return(diaspora_transmit($owner,$contact,$slap,false));
2967
2968
2969 }
2970
2971 function diaspora_transmit($owner,$contact,$slap,$public_batch,$queue_run=false) {
2972
2973         $enabled = intval(get_config('system','diaspora_enabled'));
2974         if(! $enabled) {
2975                 return 200;
2976         }
2977
2978         $a = get_app();
2979         $logid = random_string(4);
2980         $dest_url = (($public_batch) ? $contact['batch'] : $contact['notify']);
2981         if(! $dest_url) {
2982                 logger('diaspora_transmit: no url for contact: ' . $contact['id'] . ' batch mode =' . $public_batch);
2983                 return 0;
2984         }
2985
2986         logger('diaspora_transmit: ' . $logid . ' ' . $dest_url);
2987
2988         if( (! $queue_run) && (was_recently_delayed($contact['id'])) ) {
2989                 $return_code = 0;
2990         }
2991         else {
2992                 if (!intval(get_config('system','diaspora_test'))) {
2993                         post_url($dest_url . '/', $slap);
2994                         $return_code = $a->get_curl_code();
2995                 } else {
2996                         logger('diaspora_transmit: test_mode');
2997                         return 200;
2998                 }
2999         }
3000
3001         logger('diaspora_transmit: ' . $logid . ' returns: ' . $return_code);
3002
3003         if((! $return_code) || (($return_code == 503) && (stristr($a->get_curl_headers(),'retry-after')))) {
3004                 logger('diaspora_transmit: queue message');
3005
3006                 $r = q("SELECT id from queue where cid = %d and network = '%s' and content = '%s' and batch = %d limit 1",
3007                         intval($contact['id']),
3008                         dbesc(NETWORK_DIASPORA),
3009                         dbesc($slap),
3010                         intval($public_batch)
3011                 );
3012                 if(count($r)) {
3013                         logger('diaspora_transmit: add_to_queue ignored - identical item already in queue');
3014                 }
3015                 else {
3016                         // queue message for redelivery
3017                         add_to_queue($contact['id'],NETWORK_DIASPORA,$slap,$public_batch);
3018                 }
3019         }
3020
3021
3022         return(($return_code) ? $return_code : (-1));
3023 }
3024
3025