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