src/Worker/Delivery.php

   1 <?php
   2 /**
   3  * @file src/Worker/Delivery.php
   4  */
   5 namespace Friendica\Worker;
   6
   7 use Friendica\BaseObject;
   8 use Friendica\Core\Config;
   9 use Friendica\Core\L10n;
  10 use Friendica\Core\Logger;
  11 use Friendica\Core\Protocol;
  12 use Friendica\Core\System;
  13 use Friendica\Database\DBA;
  14 use Friendica\Model;
  15 use Friendica\Protocol\DFRN;
  16 use Friendica\Protocol\Diaspora;
  17 use Friendica\Protocol\Email;
  18 use Friendica\Protocol\Activity;
  19 use Friendica\Util\Strings;
  20 use Friendica\Util\Network;
  21 use Friendica\Core\Worker;
  22
  23 class Delivery extends BaseObject
  24 {
  25         const MAIL          = 'mail';
  26         const SUGGESTION    = 'suggest';
  27         const RELOCATION    = 'relocate';
  28         const DELETION      = 'drop';
  29         const POST          = 'wall-new';
  30         const POKE          = 'poke';
  31         const UPLINK        = 'uplink';
  32         const REMOVAL       = 'removeme';
  33         const PROFILEUPDATE = 'profileupdate';
  34
  35         public static function execute($cmd, $target_id, $contact_id)
  36         {
  37                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id, 'contact' => $contact_id]);
  38
  39                 $top_level = false;
  40                 $followup = false;
  41                 $public_message = false;
  42
  43                 $items = [];
  44                 if ($cmd == self::MAIL) {
  45                         $target_item = DBA::selectFirst('mail', [], ['id' => $target_id]);
  46                         if (!DBA::isResult($target_item)) {
  47                                 self::setFailedQueue($cmd, $target_id);
  48                                 return;
  49                         }
  50                         $uid = $target_item['uid'];
  51                 } elseif ($cmd == self::SUGGESTION) {
  52                         $target_item = DBA::selectFirst('fsuggest', [], ['id' => $target_id]);
  53                         if (!DBA::isResult($target_item)) {
  54                                 self::setFailedQueue($cmd, $target_id);
  55                                 return;
  56                         }
  57                         $uid = $target_item['uid'];
  58                 } elseif ($cmd == self::RELOCATION) {
  59                         $uid = $target_id;
  60                         $target_item = [];
  61                 } else {
  62                         $item = Model\Item::selectFirst(['parent'], ['id' => $target_id]);
  63                         if (!DBA::isResult($item) || empty($item['parent'])) {
  64                                 self::setFailedQueue($cmd, $target_id);
  65                                 return;
  66                         }
  67                         $parent_id = intval($item['parent']);
  68
  69                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true, 'moderated' => false];
  70                         $params = ['order' => ['id']];
  71                         $itemdata = Model\Item::select([], $condition, $params);
  72
  73                         while ($item = Model\Item::fetch($itemdata)) {
  74                                 if ($item['id'] == $parent_id) {
  75                                         $parent = $item;
  76                                 }
  77                                 if ($item['id'] == $target_id) {
  78                                         $target_item = $item;
  79                                 }
  80                                 $items[] = $item;
  81                         }
  82                         DBA::close($itemdata);
  83
  84                         if (empty($target_item)) {
  85                                 Logger::log('Item ' . $target_id . "wasn't found. Quitting here.");
  86                                 self::setFailedQueue($cmd, $target_id);
  87                                 return;
  88                         }
  89
  90                         if (empty($parent)) {
  91                                 Logger::log('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
  92                                 self::setFailedQueue($cmd, $target_id);
  93                                 return;
  94                         }
  95
  96                         if (!empty($target_item['contact-uid'])) {
  97                                 $uid = $target_item['contact-uid'];
  98                         } elseif (!empty($target_item['uid'])) {
  99                                 $uid = $target_item['uid'];
 100                         } else {
 101                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 102                                 self::setFailedQueue($cmd, $target_id);
 103                                 return;
 104                         }
 105
 106                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 107                         $thr_parent = Model\Item::selectFirst(['network', 'object'], $condition);
 108                         if (!DBA::isResult($thr_parent)) {
 109                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 110                                 // That's totally okay for what we use this variable here.
 111                                 $thr_parent = $parent;
 112                         }
 113
 114                         if (!empty($contact_id) && Model\Contact::isArchived($contact_id)) {
 115                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 116                                 self::setFailedQueue($cmd, $target_id);
 117                                 return;
 118                         }
 119
 120                         // avoid race condition with deleting entries
 121                         if ($items[0]['deleted']) {
 122                                 foreach ($items as $item) {
 123                                         $item['deleted'] = 1;
 124                                 }
 125                         }
 126
 127                         // When commenting too fast after delivery, a post wasn't recognized as top level post.
 128                         // The count then showed more than one entry. The additional check should help.
 129                         // The check for the "count" should be superfluous, but I'm not totally sure by now, so we keep it.
 130                         if ((($parent['id'] == $target_id) || (count($items) == 1)) && ($parent['uri'] === $parent['parent-uri'])) {
 131                                 Logger::log('Top level post');
 132                                 $top_level = true;
 133                         }
 134
 135                         // This is IMPORTANT!!!!
 136
 137                         // We will only send a "notify owner to relay" or followup message if the referenced post
 138                         // originated on our system by virtue of having our hostname somewhere
 139                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 140                         // if $parent['wall'] == 1 we will already have the parent message in our array
 141                         // and we will relay the whole lot.
 142
 143                         $localhost = self::getApp()->getHostName();
 144                         if (strpos($localhost, ':')) {
 145                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 146                         }
 147                         /**
 148                          *
 149                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 150                          * have been known to cause runaway conditions which affected several servers, along with
 151                          * permissions issues.
 152                          *
 153                          */
 154
 155                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 156                                 Logger::log('Followup ' . $target_item["guid"], Logger::DEBUG);
 157                                 // local followup to remote post
 158                                 $followup = true;
 159                         }
 160
 161                         if (empty($parent['allow_cid'])
 162                                 && empty($parent['allow_gid'])
 163                                 && empty($parent['deny_cid'])
 164                                 && empty($parent['deny_gid'])
 165                                 && !$parent["private"]) {
 166                                 $public_message = true;
 167                         }
 168                 }
 169
 170                 if (empty($items)) {
 171                         Logger::log('No delivery data for  ' . $cmd . ' - Item ID: ' .$target_id . ' - Contact ID: ' . $contact_id);
 172                 }
 173
 174                 $owner = Model\User::getOwnerDataById($uid);
 175                 if (!DBA::isResult($owner)) {
 176                         self::setFailedQueue($cmd, $target_id);
 177                         return;
 178                 }
 179
 180                 // We don't deliver our items to blocked or pending contacts, and not to ourselves either
 181                 $contact = DBA::selectFirst('contact', [],
 182                         ['id' => $contact_id, 'blocked' => false, 'pending' => false, 'self' => false]
 183                 );
 184                 if (!DBA::isResult($contact)) {
 185                         self::setFailedQueue($cmd, $target_id);
 186                         return;
 187                 }
 188
 189                 if (Network::isUrlBlocked($contact['url'])) {
 190                         self::setFailedQueue($cmd, $target_id);
 191                         return;
 192                 }
 193
 194                 // Transmit via Diaspora if the thread had started as Diaspora post.
 195                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 196                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 197                 if (!empty($parent) && !empty($thr_parent) && in_array(Protocol::DIASPORA, [$parent['network'], $thr_parent['network']])) {
 198                         $contact['network'] = Protocol::DIASPORA;
 199                 }
 200
 201                 Logger::notice('Delivering', ['cmd' => $cmd, 'target' => $target_id, 'followup' => $followup, 'network' => $contact['network']]);
 202
 203                 switch ($contact['network']) {
 204                         case Protocol::DFRN:
 205                                 self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 206                                 break;
 207
 208                         case Protocol::DIASPORA:
 209                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 210                                 break;
 211
 212                         case Protocol::MAIL:
 213                                 self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 214                                 break;
 215
 216                         default:
 217                                 break;
 218                 }
 219
 220                 return;
 221         }
 222
 223         /**
 224          * Increased the "failed" counter in the item delivery data
 225          *
 226          * @param string  $cmd Command
 227          * @param integer $id  Item id
 228          */
 229         private static function setFailedQueue(string $cmd, int $id)
 230         {
 231                 if (!in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 232                         return;
 233                 }
 234
 235                 Model\ItemDeliveryData::incrementQueueFailed($id);
 236         }
 237
 238         /**
 239          * @brief Deliver content via DFRN
 240          *
 241          * @param string  $cmd            Command
 242          * @param array   $contact        Contact record of the receiver
 243          * @param array   $owner          Owner record of the sender
 244          * @param array   $items          Item record of the content and the parent
 245          * @param array   $target_item    Item record of the content
 246          * @param boolean $public_message Is the content public?
 247          * @param boolean $top_level      Is it a thread starter?
 248          * @param boolean $followup       Is it an answer to a remote post?
 249          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 250          * @throws \ImagickException
 251          */
 252         private static function deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 253         {
 254                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 255
 256                 if ($cmd == self::MAIL) {
 257                         $item = $target_item;
 258                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 259                         $atom = DFRN::mail($item, $owner);
 260                 } elseif ($cmd == self::SUGGESTION) {
 261                         $item = $target_item;
 262                         $atom = DFRN::fsuggest($item, $owner);
 263                         DBA::delete('fsuggest', ['id' => $item['id']]);
 264                 } elseif ($cmd == self::RELOCATION) {
 265                         $atom = DFRN::relocate($owner, $owner['uid']);
 266                 } elseif ($followup) {
 267                         $msgitems = [$target_item];
 268                         $atom = DFRN::entries($msgitems, $owner);
 269                 } else {
 270                         $msgitems = [];
 271                         foreach ($items as $item) {
 272                                 // Only add the parent when we don't delete other items.
 273                                 if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 274                                         $item["entry:comment-allow"] = true;
 275                                         $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 276                                         $msgitems[] = $item;
 277                                 }
 278                         }
 279                         $atom = DFRN::entries($msgitems, $owner);
 280                 }
 281
 282                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 283
 284                 $basepath =  implode('/', array_slice(explode('/', $contact['url']), 0, 3));
 285
 286                 // perform local delivery if we are on the same site
 287
 288                 if (Strings::compareLink($basepath, System::baseUrl())) {
 289                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 290                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 291                         if (!DBA::isResult($target_self)) {
 292                                 return;
 293                         }
 294                         $target_uid = $target_self['uid'];
 295
 296                         // Check if the user has got this contact
 297                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 298                         if (!$cid) {
 299                                 // Otherwise there should be a public contact
 300                                 $cid = Model\Contact::getIdForURL($owner['url']);
 301                                 if (!$cid) {
 302                                         return;
 303                                 }
 304                         }
 305
 306                         $target_importer = DFRN::getImporter($cid, $target_uid);
 307                         if (empty($target_importer)) {
 308                                 // This should never happen
 309                                 return;
 310                         }
 311
 312                         DFRN::import($atom, $target_importer);
 313
 314                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 315                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DFRN);
 316                         }
 317
 318                         return;
 319                 }
 320
 321                 $protocol = Model\ItemDeliveryData::DFRN;
 322
 323                 // We don't have a relationship with contacts on a public post.
 324                 // Se we transmit with the new method and via Diaspora as a fallback
 325                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 326                         // Transmit in public if it's a relay post
 327                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 328
 329                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 330
 331                         // We never spool failed relay deliveries
 332                         if ($public_dfrn) {
 333                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 334
 335                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 336                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 337                                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 338                                         } else {
 339                                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 340                                         }
 341                                 }
 342                                 return;
 343                         }
 344
 345                         if (($deliver_status < 200) || ($deliver_status > 299)) {
 346                                 // Transmit via Diaspora if not possible via Friendica
 347                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 348                                 return;
 349                         }
 350                 } elseif ($cmd != self::RELOCATION) {
 351                         // DFRN payload over Diaspora transport layer
 352                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 353                         if ($deliver_status < 200) {
 354                                 // Legacy DFRN
 355                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 356                                 $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 357                         }
 358                 } else {
 359                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 360                         $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 361                 }
 362
 363                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 364
 365                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 366                         // We successfully delivered a message, the contact is alive
 367                         Model\Contact::unmarkForArchival($contact);
 368
 369                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 370                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 371                         }
 372                 } else {
 373                         // The message could not be delivered. We mark the contact as "dead"
 374                         Model\Contact::markForArchival($contact);
 375
 376                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 377                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 378                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 379                         }
 380                 }
 381         }
 382
 383         /**
 384          * @brief Deliver content via Diaspora
 385          *
 386          * @param string  $cmd            Command
 387          * @param array   $contact        Contact record of the receiver
 388          * @param array   $owner          Owner record of the sender
 389          * @param array   $items          Item record of the content and the parent
 390          * @param array   $target_item    Item record of the content
 391          * @param boolean $public_message Is the content public?
 392          * @param boolean $top_level      Is it a thread starter?
 393          * @param boolean $followup       Is it an answer to a remote post?
 394          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 395          * @throws \ImagickException
 396          */
 397         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 398         {
 399                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 400                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 401
 402                 if ($public_message) {
 403                         $loc = 'public batch ' . $contact['batch'];
 404                 } else {
 405                         $loc = $contact['addr'];
 406                 }
 407
 408                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 409
 410                 if (Config::get('system', 'dfrn_only') || !Config::get('system', 'diaspora_enabled')) {
 411                         return;
 412                 }
 413
 414                 if ($cmd == self::MAIL) {
 415                         Diaspora::sendMail($target_item, $owner, $contact);
 416                         return;
 417                 }
 418
 419                 if ($cmd == self::SUGGESTION) {
 420                         return;
 421                 }
 422
 423                 if (!$contact['pubkey'] && !$public_message) {
 424                         return;
 425                 }
 426
 427                 if ($cmd == self::RELOCATION) {
 428                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 429                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 430                         // top-level retraction
 431                         Logger::log('diaspora retract: ' . $loc);
 432                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 433                 } elseif ($followup) {
 434                         // send comments and likes to owner to relay
 435                         Logger::log('diaspora followup: ' . $loc);
 436                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 437                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 438                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 439                         Logger::log('diaspora relay: ' . $loc);
 440                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 441                 } elseif ($top_level && !$walltowall) {
 442                         // currently no workable solution for sending walltowall
 443                         Logger::log('diaspora status: ' . $loc);
 444                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 445                 } else {
 446                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 447                         return;
 448                 }
 449
 450                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 451                         // We successfully delivered a message, the contact is alive
 452                         Model\Contact::unmarkForArchival($contact);
 453
 454                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 455                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DIASPORA);
 456                         }
 457                 } else {
 458                         // The message could not be delivered. We mark the contact as "dead"
 459                         Model\Contact::markForArchival($contact);
 460
 461                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 462                         if ($public_message) {
 463                                 Diaspora::markRelayForArchival($contact);
 464                         }
 465
 466                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 467                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 468                                 // defer message for redelivery
 469                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 470                                         Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 471                                 }
 472                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 473                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 474                         }
 475                 }
 476         }
 477
 478         /**
 479          * @brief Deliver content via mail
 480          *
 481          * @param string $cmd         Command
 482          * @param array  $contact     Contact record of the receiver
 483          * @param array  $owner       Owner record of the sender
 484          * @param array  $target_item Item record of the content
 485          * @param array  $thr_parent  Item record of the direct parent in the thread
 486          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 487          * @throws \ImagickException
 488          */
 489         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 490         {
 491                 if (Config::get('system','dfrn_only')) {
 492                         return;
 493                 }
 494
 495                 $addr = $contact['addr'];
 496                 if (!strlen($addr)) {
 497                         return;
 498                 }
 499
 500                 if (!in_array($cmd, [self::POST, self::POKE])) {
 501                         return;
 502                 }
 503 Logger::info('Blubb', $target_item);
 504                 if ($target_item['verb'] != Activity::POST) {
 505                         return;
 506                 }
 507
 508                 if (!empty($thr_parent['object'])) {
 509                         $data = json_decode($thr_parent['object'], true);
 510                         if (!empty($data['reply_to'])) {
 511                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 512                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 513                         } elseif (!empty($data['from'])) {
 514                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 515                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 516                         }
 517                 }
 518
 519                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 520                 if (!DBA::isResult($local_user)) {
 521                         return;
 522                 }
 523
 524                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 525
 526                 $reply_to = '';
 527                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 528                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 529                         $reply_to = $mailacct['reply_to'];
 530                 }
 531
 532                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : L10n::t("\x28no subject\x29"));
 533
 534                 // only expose our real email address to true friends
 535
 536                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 537                         if ($reply_to) {
 538                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 539                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 540                         } else {
 541                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 542                         }
 543                 } else {
 544                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <noreply@' . self::getApp()->getHostName() . '>' . "\n";
 545                 }
 546
 547                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 548
 549                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 550                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 551
 552                         // Export more references on deeper nested threads
 553                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 554                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 555                         }
 556
 557                         $headers .= "\n";
 558
 559                         if (empty($target_item['title'])) {
 560                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 561                                 $title = Model\Item::selectFirst(['title'], $condition);
 562
 563                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 564                                         $subject = $title['title'];
 565                                 } else {
 566                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 567                                         $title = Model\Item::selectFirst(['title'], $condition);
 568
 569                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 570                                                 $subject = $title['title'];
 571                                         }
 572                                 }
 573                         }
 574
 575                         if (strncasecmp($subject, 'RE:', 3)) {
 576                                 $subject = 'Re: ' . $subject;
 577                         }
 578                 }
 579
 580                 Email::send($addr, $subject, $headers, $target_item);
 581
 582                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::MAIL);
 583
 584                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 585         }
 586 }