src/Worker/Delivery.php

   1 <?php
   2 /**
   3  * @file src/Worker/Delivery.php
   4  */
   5 namespace Friendica\Worker;
   6
   7 use Friendica\Core\Logger;
   8 use Friendica\Core\Protocol;
   9 use Friendica\Database\DBA;
  10 use Friendica\DI;
  11 use Friendica\Model;
  12 use Friendica\Protocol\DFRN;
  13 use Friendica\Protocol\Diaspora;
  14 use Friendica\Protocol\Email;
  15 use Friendica\Protocol\Activity;
  16 use Friendica\Util\Strings;
  17 use Friendica\Util\Network;
  18 use Friendica\Core\Worker;
  19
  20 class Delivery
  21 {
  22         const MAIL          = 'mail';
  23         const SUGGESTION    = 'suggest';
  24         const RELOCATION    = 'relocate';
  25         const DELETION      = 'drop';
  26         const POST          = 'wall-new';
  27         const POKE          = 'poke';
  28         const UPLINK        = 'uplink';
  29         const REMOVAL       = 'removeme';
  30         const PROFILEUPDATE = 'profileupdate';
  31
  32         public static function execute($cmd, $target_id, $contact_id)
  33         {
  34                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id, 'contact' => $contact_id]);
  35
  36                 $top_level = false;
  37                 $followup = false;
  38                 $public_message = false;
  39
  40                 $items = [];
  41                 if ($cmd == self::MAIL) {
  42                         $target_item = DBA::selectFirst('mail', [], ['id' => $target_id]);
  43                         if (!DBA::isResult($target_item)) {
  44                                 self::setFailedQueue($cmd, $target_id);
  45                                 return;
  46                         }
  47                         $uid = $target_item['uid'];
  48                 } elseif ($cmd == self::SUGGESTION) {
  49                         $target_item = DBA::selectFirst('fsuggest', [], ['id' => $target_id]);
  50                         if (!DBA::isResult($target_item)) {
  51                                 self::setFailedQueue($cmd, $target_id);
  52                                 return;
  53                         }
  54                         $uid = $target_item['uid'];
  55                 } elseif ($cmd == self::RELOCATION) {
  56                         $uid = $target_id;
  57                         $target_item = [];
  58                 } else {
  59                         $item = Model\Item::selectFirst(['parent'], ['id' => $target_id]);
  60                         if (!DBA::isResult($item) || empty($item['parent'])) {
  61                                 self::setFailedQueue($cmd, $target_id);
  62                                 return;
  63                         }
  64                         $parent_id = intval($item['parent']);
  65
  66                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true, 'moderated' => false];
  67                         $params = ['order' => ['id']];
  68                         $itemdata = Model\Item::select([], $condition, $params);
  69
  70                         while ($item = Model\Item::fetch($itemdata)) {
  71                                 if ($item['id'] == $parent_id) {
  72                                         $parent = $item;
  73                                 }
  74                                 if ($item['id'] == $target_id) {
  75                                         $target_item = $item;
  76                                 }
  77                                 $items[] = $item;
  78                         }
  79                         DBA::close($itemdata);
  80
  81                         if (empty($target_item)) {
  82                                 Logger::log('Item ' . $target_id . "wasn't found. Quitting here.");
  83                                 self::setFailedQueue($cmd, $target_id);
  84                                 return;
  85                         }
  86
  87                         if (empty($parent)) {
  88                                 Logger::log('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
  89                                 self::setFailedQueue($cmd, $target_id);
  90                                 return;
  91                         }
  92
  93                         if (!empty($target_item['contact-uid'])) {
  94                                 $uid = $target_item['contact-uid'];
  95                         } elseif (!empty($target_item['uid'])) {
  96                                 $uid = $target_item['uid'];
  97                         } else {
  98                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
  99                                 self::setFailedQueue($cmd, $target_id);
 100                                 return;
 101                         }
 102
 103                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 104                         $thr_parent = Model\Item::selectFirst(['network', 'object'], $condition);
 105                         if (!DBA::isResult($thr_parent)) {
 106                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 107                                 // That's totally okay for what we use this variable here.
 108                                 $thr_parent = $parent;
 109                         }
 110
 111                         if (!empty($contact_id) && Model\Contact::isArchived($contact_id)) {
 112                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 113                                 self::setFailedQueue($cmd, $target_id);
 114                                 return;
 115                         }
 116
 117                         // avoid race condition with deleting entries
 118                         if ($items[0]['deleted']) {
 119                                 foreach ($items as $item) {
 120                                         $item['deleted'] = 1;
 121                                 }
 122                         }
 123
 124                         // When commenting too fast after delivery, a post wasn't recognized as top level post.
 125                         // The count then showed more than one entry. The additional check should help.
 126                         // The check for the "count" should be superfluous, but I'm not totally sure by now, so we keep it.
 127                         if ((($parent['id'] == $target_id) || (count($items) == 1)) && ($parent['uri'] === $parent['parent-uri'])) {
 128                                 Logger::log('Top level post');
 129                                 $top_level = true;
 130                         }
 131
 132                         // This is IMPORTANT!!!!
 133
 134                         // We will only send a "notify owner to relay" or followup message if the referenced post
 135                         // originated on our system by virtue of having our hostname somewhere
 136                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 137                         // if $parent['wall'] == 1 we will already have the parent message in our array
 138                         // and we will relay the whole lot.
 139
 140                         $localhost = DI::baseUrl()->getHostname();
 141                         if (strpos($localhost, ':')) {
 142                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 143                         }
 144                         /**
 145                          *
 146                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 147                          * have been known to cause runaway conditions which affected several servers, along with
 148                          * permissions issues.
 149                          *
 150                          */
 151
 152                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 153                                 Logger::log('Followup ' . $target_item["guid"], Logger::DEBUG);
 154                                 // local followup to remote post
 155                                 $followup = true;
 156                         }
 157
 158                         if (empty($parent['allow_cid'])
 159                                 && empty($parent['allow_gid'])
 160                                 && empty($parent['deny_cid'])
 161                                 && empty($parent['deny_gid'])
 162                                 && !$parent["private"]) {
 163                                 $public_message = true;
 164                         }
 165                 }
 166
 167                 if (empty($items)) {
 168                         Logger::log('No delivery data for  ' . $cmd . ' - Item ID: ' .$target_id . ' - Contact ID: ' . $contact_id);
 169                 }
 170
 171                 $owner = Model\User::getOwnerDataById($uid);
 172                 if (!DBA::isResult($owner)) {
 173                         self::setFailedQueue($cmd, $target_id);
 174                         return;
 175                 }
 176
 177                 // We don't deliver our items to blocked or pending contacts, and not to ourselves either
 178                 $contact = DBA::selectFirst('contact', [],
 179                         ['id' => $contact_id, 'blocked' => false, 'pending' => false, 'self' => false]
 180                 );
 181                 if (!DBA::isResult($contact)) {
 182                         self::setFailedQueue($cmd, $target_id);
 183                         return;
 184                 }
 185
 186                 if (Network::isUrlBlocked($contact['url'])) {
 187                         self::setFailedQueue($cmd, $target_id);
 188                         return;
 189                 }
 190
 191                 // Transmit via Diaspora if the thread had started as Diaspora post.
 192                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 193                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 194                 if (!empty($parent) && !empty($thr_parent) && in_array(Protocol::DIASPORA, [$parent['network'], $thr_parent['network']])) {
 195                         $contact['network'] = Protocol::DIASPORA;
 196                 }
 197
 198                 // Ensure that local contacts are delivered locally
 199                 if (Model\Contact::isLocal($contact['url'])) {
 200                         $contact['network'] = Protocol::DFRN;
 201                 }
 202
 203                 Logger::notice('Delivering', ['cmd' => $cmd, 'target' => $target_id, 'followup' => $followup, 'network' => $contact['network']]);
 204
 205                 switch ($contact['network']) {
 206                         case Protocol::DFRN:
 207                                 self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 208                                 break;
 209
 210                         case Protocol::DIASPORA:
 211                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 212                                 break;
 213
 214                         case Protocol::MAIL:
 215                                 self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 216                                 break;
 217
 218                         default:
 219                                 break;
 220                 }
 221
 222                 return;
 223         }
 224
 225         /**
 226          * Increased the "failed" counter in the item delivery data
 227          *
 228          * @param string  $cmd Command
 229          * @param integer $id  Item id
 230          */
 231         private static function setFailedQueue(string $cmd, int $id)
 232         {
 233                 if (!in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 234                         return;
 235                 }
 236
 237                 Model\ItemDeliveryData::incrementQueueFailed($id);
 238         }
 239
 240         /**
 241          * Deliver content via DFRN
 242          *
 243          * @param string  $cmd            Command
 244          * @param array   $contact        Contact record of the receiver
 245          * @param array   $owner          Owner record of the sender
 246          * @param array   $items          Item record of the content and the parent
 247          * @param array   $target_item    Item record of the content
 248          * @param boolean $public_message Is the content public?
 249          * @param boolean $top_level      Is it a thread starter?
 250          * @param boolean $followup       Is it an answer to a remote post?
 251          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 252          * @throws \ImagickException
 253          */
 254         private static function deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 255         {
 256                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 257                 if (Diaspora::isReshare($target_item['body']) && !empty(Diaspora::personByHandle($contact['addr'], false))) {
 258                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 259                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 260                         return;
 261                 }
 262
 263                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 264
 265                 if ($cmd == self::MAIL) {
 266                         $item = $target_item;
 267                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 268                         $atom = DFRN::mail($item, $owner);
 269                 } elseif ($cmd == self::SUGGESTION) {
 270                         $item = $target_item;
 271                         $atom = DFRN::fsuggest($item, $owner);
 272                         DBA::delete('fsuggest', ['id' => $item['id']]);
 273                 } elseif ($cmd == self::RELOCATION) {
 274                         $atom = DFRN::relocate($owner, $owner['uid']);
 275                 } elseif ($followup) {
 276                         $msgitems = [$target_item];
 277                         $atom = DFRN::entries($msgitems, $owner);
 278                 } else {
 279                         $msgitems = [];
 280                         foreach ($items as $item) {
 281                                 // Only add the parent when we don't delete other items.
 282                                 if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 283                                         $item["entry:comment-allow"] = true;
 284                                         $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 285                                         $msgitems[] = $item;
 286                                 }
 287                         }
 288                         $atom = DFRN::entries($msgitems, $owner);
 289                 }
 290
 291                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 292
 293                 // perform local delivery if we are on the same site
 294                 if (Model\Contact::isLocal($contact['url'])) {
 295                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 296                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 297                         if (!DBA::isResult($target_self)) {
 298                                 return;
 299                         }
 300                         $target_uid = $target_self['uid'];
 301
 302                         // Check if the user has got this contact
 303                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 304                         if (!$cid) {
 305                                 // Otherwise there should be a public contact
 306                                 $cid = Model\Contact::getIdForURL($owner['url']);
 307                                 if (!$cid) {
 308                                         return;
 309                                 }
 310                         }
 311
 312                         $target_importer = DFRN::getImporter($cid, $target_uid);
 313                         if (empty($target_importer)) {
 314                                 // This should never happen
 315                                 return;
 316                         }
 317
 318                         DFRN::import($atom, $target_importer);
 319
 320                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 321                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DFRN);
 322                         }
 323
 324                         return;
 325                 }
 326
 327                 $protocol = Model\ItemDeliveryData::DFRN;
 328
 329                 // We don't have a relationship with contacts on a public post.
 330                 // Se we transmit with the new method and via Diaspora as a fallback
 331                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 332                         // Transmit in public if it's a relay post
 333                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 334
 335                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 336
 337                         // We never spool failed relay deliveries
 338                         if ($public_dfrn) {
 339                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 340
 341                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 342                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 343                                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 344                                         } else {
 345                                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 346                                         }
 347                                 }
 348                                 return;
 349                         }
 350
 351                         if (($deliver_status < 200) || ($deliver_status > 299)) {
 352                                 // Transmit via Diaspora if not possible via Friendica
 353                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 354                                 return;
 355                         }
 356                 } elseif ($cmd != self::RELOCATION) {
 357                         // DFRN payload over Diaspora transport layer
 358                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 359                         if ($deliver_status < 200) {
 360                                 // Legacy DFRN
 361                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 362                                 $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 363                         }
 364                 } else {
 365                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 366                         $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 367                 }
 368
 369                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 370
 371                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 372                         // We successfully delivered a message, the contact is alive
 373                         Model\Contact::unmarkForArchival($contact);
 374
 375                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 376                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 377                         }
 378                 } else {
 379                         // The message could not be delivered. We mark the contact as "dead"
 380                         Model\Contact::markForArchival($contact);
 381
 382                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 383                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 384                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 385                         }
 386                 }
 387         }
 388
 389         /**
 390          * Deliver content via Diaspora
 391          *
 392          * @param string  $cmd            Command
 393          * @param array   $contact        Contact record of the receiver
 394          * @param array   $owner          Owner record of the sender
 395          * @param array   $items          Item record of the content and the parent
 396          * @param array   $target_item    Item record of the content
 397          * @param boolean $public_message Is the content public?
 398          * @param boolean $top_level      Is it a thread starter?
 399          * @param boolean $followup       Is it an answer to a remote post?
 400          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 401          * @throws \ImagickException
 402          */
 403         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 404         {
 405                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 406                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 407
 408                 if ($public_message) {
 409                         $loc = 'public batch ' . $contact['batch'];
 410                 } else {
 411                         $loc = $contact['addr'];
 412                 }
 413
 414                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 415
 416                 if (DI::config()->get('system', 'dfrn_only') || !DI::config()->get('system', 'diaspora_enabled')) {
 417                         return;
 418                 }
 419
 420                 if ($cmd == self::MAIL) {
 421                         Diaspora::sendMail($target_item, $owner, $contact);
 422                         return;
 423                 }
 424
 425                 if ($cmd == self::SUGGESTION) {
 426                         return;
 427                 }
 428
 429                 if (!$contact['pubkey'] && !$public_message) {
 430                         return;
 431                 }
 432
 433                 if ($cmd == self::RELOCATION) {
 434                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 435                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 436                         // top-level retraction
 437                         Logger::log('diaspora retract: ' . $loc);
 438                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 439                 } elseif ($followup) {
 440                         // send comments and likes to owner to relay
 441                         Logger::log('diaspora followup: ' . $loc);
 442                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 443                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 444                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 445                         Logger::log('diaspora relay: ' . $loc);
 446                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 447                 } elseif ($top_level && !$walltowall) {
 448                         // currently no workable solution for sending walltowall
 449                         Logger::log('diaspora status: ' . $loc);
 450                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 451                 } else {
 452                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 453                         return;
 454                 }
 455
 456                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 457                         // We successfully delivered a message, the contact is alive
 458                         Model\Contact::unmarkForArchival($contact);
 459
 460                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 461                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DIASPORA);
 462                         }
 463                 } else {
 464                         // The message could not be delivered. We mark the contact as "dead"
 465                         Model\Contact::markForArchival($contact);
 466
 467                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 468                         if ($public_message) {
 469                                 Diaspora::markRelayForArchival($contact);
 470                         }
 471
 472                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 473                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 474                                 // defer message for redelivery
 475                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 476                                         Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 477                                 }
 478                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 479                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 480                         }
 481                 }
 482         }
 483
 484         /**
 485          * Deliver content via mail
 486          *
 487          * @param string $cmd         Command
 488          * @param array  $contact     Contact record of the receiver
 489          * @param array  $owner       Owner record of the sender
 490          * @param array  $target_item Item record of the content
 491          * @param array  $thr_parent  Item record of the direct parent in the thread
 492          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 493          * @throws \ImagickException
 494          */
 495         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 496         {
 497                 if (DI::config()->get('system','dfrn_only')) {
 498                         return;
 499                 }
 500
 501                 $addr = $contact['addr'];
 502                 if (!strlen($addr)) {
 503                         return;
 504                 }
 505
 506                 if (!in_array($cmd, [self::POST, self::POKE])) {
 507                         return;
 508                 }
 509
 510                 if ($target_item['verb'] != Activity::POST) {
 511                         return;
 512                 }
 513
 514                 if (!empty($thr_parent['object'])) {
 515                         $data = json_decode($thr_parent['object'], true);
 516                         if (!empty($data['reply_to'])) {
 517                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 518                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 519                         } elseif (!empty($data['from'])) {
 520                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 521                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 522                         }
 523                 }
 524
 525                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 526                 if (!DBA::isResult($local_user)) {
 527                         return;
 528                 }
 529
 530                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 531
 532                 $reply_to = '';
 533                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 534                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 535                         $reply_to = $mailacct['reply_to'];
 536                 }
 537
 538                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 539
 540                 // only expose our real email address to true friends
 541
 542                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 543                         if ($reply_to) {
 544                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 545                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 546                         } else {
 547                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 548                         }
 549                 } else {
 550                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <noreply@' . DI::baseUrl()->getHostname() . '>' . "\n";
 551                 }
 552
 553                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 554
 555                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 556                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 557
 558                         // Export more references on deeper nested threads
 559                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 560                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 561                         }
 562
 563                         $headers .= "\n";
 564
 565                         if (empty($target_item['title'])) {
 566                                 $condition = ['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                                 } else {
 572                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 573                                         $title = Model\Item::selectFirst(['title'], $condition);
 574
 575                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 576                                                 $subject = $title['title'];
 577                                         }
 578                                 }
 579                         }
 580
 581                         if (strncasecmp($subject, 'RE:', 3)) {
 582                                 $subject = 'Re: ' . $subject;
 583                         }
 584                 }
 585
 586                 Email::send($addr, $subject, $headers, $target_item);
 587
 588                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::MAIL);
 589
 590                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 591         }
 592 }