src/Worker/Delivery.php

   1 <?php
   2 /**
   3  * @file src/Worker/Delivery.php
   4  */
   5 namespace Friendica\Worker;
   6
   7 use Friendica\Core\Config;
   8 use Friendica\Core\Logger;
   9 use Friendica\Core\Protocol;
  10 use Friendica\Database\DBA;
  11 use Friendica\DI;
  12 use Friendica\Model;
  13 use Friendica\Protocol\DFRN;
  14 use Friendica\Protocol\Diaspora;
  15 use Friendica\Protocol\Email;
  16 use Friendica\Protocol\Activity;
  17 use Friendica\Util\Strings;
  18 use Friendica\Util\Network;
  19 use Friendica\Core\Worker;
  20
  21 class Delivery
  22 {
  23         const MAIL          = 'mail';
  24         const SUGGESTION    = 'suggest';
  25         const RELOCATION    = 'relocate';
  26         const DELETION      = 'drop';
  27         const POST          = 'wall-new';
  28         const POKE          = 'poke';
  29         const UPLINK        = 'uplink';
  30         const REMOVAL       = 'removeme';
  31         const PROFILEUPDATE = 'profileupdate';
  32
  33         public static function execute($cmd, $target_id, $contact_id)
  34         {
  35                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id, 'contact' => $contact_id]);
  36
  37                 $top_level = false;
  38                 $followup = false;
  39                 $public_message = false;
  40
  41                 $items = [];
  42                 if ($cmd == self::MAIL) {
  43                         $target_item = DBA::selectFirst('mail', [], ['id' => $target_id]);
  44                         if (!DBA::isResult($target_item)) {
  45                                 self::setFailedQueue($cmd, $target_id);
  46                                 return;
  47                         }
  48                         $uid = $target_item['uid'];
  49                 } elseif ($cmd == self::SUGGESTION) {
  50                         $target_item = DBA::selectFirst('fsuggest', [], ['id' => $target_id]);
  51                         if (!DBA::isResult($target_item)) {
  52                                 self::setFailedQueue($cmd, $target_id);
  53                                 return;
  54                         }
  55                         $uid = $target_item['uid'];
  56                 } elseif ($cmd == self::RELOCATION) {
  57                         $uid = $target_id;
  58                         $target_item = [];
  59                 } else {
  60                         $item = Model\Item::selectFirst(['parent'], ['id' => $target_id]);
  61                         if (!DBA::isResult($item) || empty($item['parent'])) {
  62                                 self::setFailedQueue($cmd, $target_id);
  63                                 return;
  64                         }
  65                         $parent_id = intval($item['parent']);
  66
  67                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true, 'moderated' => false];
  68                         $params = ['order' => ['id']];
  69                         $itemdata = Model\Item::select([], $condition, $params);
  70
  71                         while ($item = Model\Item::fetch($itemdata)) {
  72                                 if ($item['id'] == $parent_id) {
  73                                         $parent = $item;
  74                                 }
  75                                 if ($item['id'] == $target_id) {
  76                                         $target_item = $item;
  77                                 }
  78                                 $items[] = $item;
  79                         }
  80                         DBA::close($itemdata);
  81
  82                         if (empty($target_item)) {
  83                                 Logger::log('Item ' . $target_id . "wasn't found. Quitting here.");
  84                                 self::setFailedQueue($cmd, $target_id);
  85                                 return;
  86                         }
  87
  88                         if (empty($parent)) {
  89                                 Logger::log('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
  90                                 self::setFailedQueue($cmd, $target_id);
  91                                 return;
  92                         }
  93
  94                         if (!empty($target_item['contact-uid'])) {
  95                                 $uid = $target_item['contact-uid'];
  96                         } elseif (!empty($target_item['uid'])) {
  97                                 $uid = $target_item['uid'];
  98                         } else {
  99                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 100                                 self::setFailedQueue($cmd, $target_id);
 101                                 return;
 102                         }
 103
 104                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 105                         $thr_parent = Model\Item::selectFirst(['network', 'object'], $condition);
 106                         if (!DBA::isResult($thr_parent)) {
 107                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 108                                 // That's totally okay for what we use this variable here.
 109                                 $thr_parent = $parent;
 110                         }
 111
 112                         if (!empty($contact_id) && Model\Contact::isArchived($contact_id)) {
 113                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 114                                 self::setFailedQueue($cmd, $target_id);
 115                                 return;
 116                         }
 117
 118                         // avoid race condition with deleting entries
 119                         if ($items[0]['deleted']) {
 120                                 foreach ($items as $item) {
 121                                         $item['deleted'] = 1;
 122                                 }
 123                         }
 124
 125                         // When commenting too fast after delivery, a post wasn't recognized as top level post.
 126                         // The count then showed more than one entry. The additional check should help.
 127                         // The check for the "count" should be superfluous, but I'm not totally sure by now, so we keep it.
 128                         if ((($parent['id'] == $target_id) || (count($items) == 1)) && ($parent['uri'] === $parent['parent-uri'])) {
 129                                 Logger::log('Top level post');
 130                                 $top_level = true;
 131                         }
 132
 133                         // This is IMPORTANT!!!!
 134
 135                         // We will only send a "notify owner to relay" or followup message if the referenced post
 136                         // originated on our system by virtue of having our hostname somewhere
 137                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 138                         // if $parent['wall'] == 1 we will already have the parent message in our array
 139                         // and we will relay the whole lot.
 140
 141                         $localhost = DI::baseUrl()->getHostname();
 142                         if (strpos($localhost, ':')) {
 143                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 144                         }
 145                         /**
 146                          *
 147                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 148                          * have been known to cause runaway conditions which affected several servers, along with
 149                          * permissions issues.
 150                          *
 151                          */
 152
 153                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 154                                 Logger::log('Followup ' . $target_item["guid"], Logger::DEBUG);
 155                                 // local followup to remote post
 156                                 $followup = true;
 157                         }
 158
 159                         if (empty($parent['allow_cid'])
 160                                 && empty($parent['allow_gid'])
 161                                 && empty($parent['deny_cid'])
 162                                 && empty($parent['deny_gid'])
 163                                 && !$parent["private"]) {
 164                                 $public_message = true;
 165                         }
 166                 }
 167
 168                 if (empty($items)) {
 169                         Logger::log('No delivery data for  ' . $cmd . ' - Item ID: ' .$target_id . ' - Contact ID: ' . $contact_id);
 170                 }
 171
 172                 $owner = Model\User::getOwnerDataById($uid);
 173                 if (!DBA::isResult($owner)) {
 174                         self::setFailedQueue($cmd, $target_id);
 175                         return;
 176                 }
 177
 178                 // We don't deliver our items to blocked or pending contacts, and not to ourselves either
 179                 $contact = DBA::selectFirst('contact', [],
 180                         ['id' => $contact_id, 'blocked' => false, 'pending' => false, 'self' => false]
 181                 );
 182                 if (!DBA::isResult($contact)) {
 183                         self::setFailedQueue($cmd, $target_id);
 184                         return;
 185                 }
 186
 187                 if (Network::isUrlBlocked($contact['url'])) {
 188                         self::setFailedQueue($cmd, $target_id);
 189                         return;
 190                 }
 191
 192                 // Transmit via Diaspora if the thread had started as Diaspora post.
 193                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 194                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 195                 if (!empty($parent) && !empty($thr_parent) && in_array(Protocol::DIASPORA, [$parent['network'], $thr_parent['network']])) {
 196                         $contact['network'] = Protocol::DIASPORA;
 197                 }
 198
 199                 // Ensure that local contacts are delivered locally
 200                 if (Model\Contact::isLocal($contact['url'])) {
 201                         $contact['network'] = Protocol::DFRN;
 202                 }
 203
 204                 Logger::notice('Delivering', ['cmd' => $cmd, 'target' => $target_id, 'followup' => $followup, 'network' => $contact['network']]);
 205
 206                 switch ($contact['network']) {
 207                         case Protocol::DFRN:
 208                                 self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 209                                 break;
 210
 211                         case Protocol::DIASPORA:
 212                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 213                                 break;
 214
 215                         case Protocol::MAIL:
 216                                 self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 217                                 break;
 218
 219                         default:
 220                                 break;
 221                 }
 222
 223                 return;
 224         }
 225
 226         /**
 227          * Increased the "failed" counter in the item delivery data
 228          *
 229          * @param string  $cmd Command
 230          * @param integer $id  Item id
 231          */
 232         private static function setFailedQueue(string $cmd, int $id)
 233         {
 234                 if (!in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 235                         return;
 236                 }
 237
 238                 Model\ItemDeliveryData::incrementQueueFailed($id);
 239         }
 240
 241         /**
 242          * Deliver content via DFRN
 243          *
 244          * @param string  $cmd            Command
 245          * @param array   $contact        Contact record of the receiver
 246          * @param array   $owner          Owner record of the sender
 247          * @param array   $items          Item record of the content and the parent
 248          * @param array   $target_item    Item record of the content
 249          * @param boolean $public_message Is the content public?
 250          * @param boolean $top_level      Is it a thread starter?
 251          * @param boolean $followup       Is it an answer to a remote post?
 252          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 253          * @throws \ImagickException
 254          */
 255         private static function deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 256         {
 257                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 258                 if (Diaspora::isReshare($target_item['body']) && !empty(Diaspora::personByHandle($contact['addr'], false))) {
 259                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 260                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 261                         return;
 262                 }
 263
 264                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 265
 266                 if ($cmd == self::MAIL) {
 267                         $item = $target_item;
 268                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 269                         $atom = DFRN::mail($item, $owner);
 270                 } elseif ($cmd == self::SUGGESTION) {
 271                         $item = $target_item;
 272                         $atom = DFRN::fsuggest($item, $owner);
 273                         DBA::delete('fsuggest', ['id' => $item['id']]);
 274                 } elseif ($cmd == self::RELOCATION) {
 275                         $atom = DFRN::relocate($owner, $owner['uid']);
 276                 } elseif ($followup) {
 277                         $msgitems = [$target_item];
 278                         $atom = DFRN::entries($msgitems, $owner);
 279                 } else {
 280                         $msgitems = [];
 281                         foreach ($items as $item) {
 282                                 // Only add the parent when we don't delete other items.
 283                                 if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 284                                         $item["entry:comment-allow"] = true;
 285                                         $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 286                                         $msgitems[] = $item;
 287                                 }
 288                         }
 289                         $atom = DFRN::entries($msgitems, $owner);
 290                 }
 291
 292                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 293
 294                 // perform local delivery if we are on the same site
 295                 if (Model\Contact::isLocal($contact['url'])) {
 296                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 297                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 298                         if (!DBA::isResult($target_self)) {
 299                                 return;
 300                         }
 301                         $target_uid = $target_self['uid'];
 302
 303                         // Check if the user has got this contact
 304                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 305                         if (!$cid) {
 306                                 // Otherwise there should be a public contact
 307                                 $cid = Model\Contact::getIdForURL($owner['url']);
 308                                 if (!$cid) {
 309                                         return;
 310                                 }
 311                         }
 312
 313                         $target_importer = DFRN::getImporter($cid, $target_uid);
 314                         if (empty($target_importer)) {
 315                                 // This should never happen
 316                                 return;
 317                         }
 318
 319                         DFRN::import($atom, $target_importer);
 320
 321                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 322                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DFRN);
 323                         }
 324
 325                         return;
 326                 }
 327
 328                 $protocol = Model\ItemDeliveryData::DFRN;
 329
 330                 // We don't have a relationship with contacts on a public post.
 331                 // Se we transmit with the new method and via Diaspora as a fallback
 332                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 333                         // Transmit in public if it's a relay post
 334                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 335
 336                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 337
 338                         // We never spool failed relay deliveries
 339                         if ($public_dfrn) {
 340                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 341
 342                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 343                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 344                                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 345                                         } else {
 346                                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 347                                         }
 348                                 }
 349                                 return;
 350                         }
 351
 352                         if (($deliver_status < 200) || ($deliver_status > 299)) {
 353                                 // Transmit via Diaspora if not possible via Friendica
 354                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 355                                 return;
 356                         }
 357                 } elseif ($cmd != self::RELOCATION) {
 358                         // DFRN payload over Diaspora transport layer
 359                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 360                         if ($deliver_status < 200) {
 361                                 // Legacy DFRN
 362                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 363                                 $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 364                         }
 365                 } else {
 366                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 367                         $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 368                 }
 369
 370                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 371
 372                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 373                         // We successfully delivered a message, the contact is alive
 374                         Model\Contact::unmarkForArchival($contact);
 375
 376                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 377                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 378                         }
 379                 } else {
 380                         // The message could not be delivered. We mark the contact as "dead"
 381                         Model\Contact::markForArchival($contact);
 382
 383                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 384                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 385                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 386                         }
 387                 }
 388         }
 389
 390         /**
 391          * Deliver content via Diaspora
 392          *
 393          * @param string  $cmd            Command
 394          * @param array   $contact        Contact record of the receiver
 395          * @param array   $owner          Owner record of the sender
 396          * @param array   $items          Item record of the content and the parent
 397          * @param array   $target_item    Item record of the content
 398          * @param boolean $public_message Is the content public?
 399          * @param boolean $top_level      Is it a thread starter?
 400          * @param boolean $followup       Is it an answer to a remote post?
 401          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 402          * @throws \ImagickException
 403          */
 404         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 405         {
 406                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 407                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 408
 409                 if ($public_message) {
 410                         $loc = 'public batch ' . $contact['batch'];
 411                 } else {
 412                         $loc = $contact['addr'];
 413                 }
 414
 415                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 416
 417                 if (Config::get('system', 'dfrn_only') || !Config::get('system', 'diaspora_enabled')) {
 418                         return;
 419                 }
 420
 421                 if ($cmd == self::MAIL) {
 422                         Diaspora::sendMail($target_item, $owner, $contact);
 423                         return;
 424                 }
 425
 426                 if ($cmd == self::SUGGESTION) {
 427                         return;
 428                 }
 429
 430                 if (!$contact['pubkey'] && !$public_message) {
 431                         return;
 432                 }
 433
 434                 if ($cmd == self::RELOCATION) {
 435                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 436                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 437                         // top-level retraction
 438                         Logger::log('diaspora retract: ' . $loc);
 439                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 440                 } elseif ($followup) {
 441                         // send comments and likes to owner to relay
 442                         Logger::log('diaspora followup: ' . $loc);
 443                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 444                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 445                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 446                         Logger::log('diaspora relay: ' . $loc);
 447                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 448                 } elseif ($top_level && !$walltowall) {
 449                         // currently no workable solution for sending walltowall
 450                         Logger::log('diaspora status: ' . $loc);
 451                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 452                 } else {
 453                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 454                         return;
 455                 }
 456
 457                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 458                         // We successfully delivered a message, the contact is alive
 459                         Model\Contact::unmarkForArchival($contact);
 460
 461                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 462                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DIASPORA);
 463                         }
 464                 } else {
 465                         // The message could not be delivered. We mark the contact as "dead"
 466                         Model\Contact::markForArchival($contact);
 467
 468                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 469                         if ($public_message) {
 470                                 Diaspora::markRelayForArchival($contact);
 471                         }
 472
 473                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 474                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 475                                 // defer message for redelivery
 476                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 477                                         Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 478                                 }
 479                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 480                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 481                         }
 482                 }
 483         }
 484
 485         /**
 486          * Deliver content via mail
 487          *
 488          * @param string $cmd         Command
 489          * @param array  $contact     Contact record of the receiver
 490          * @param array  $owner       Owner record of the sender
 491          * @param array  $target_item Item record of the content
 492          * @param array  $thr_parent  Item record of the direct parent in the thread
 493          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 494          * @throws \ImagickException
 495          */
 496         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 497         {
 498                 if (Config::get('system','dfrn_only')) {
 499                         return;
 500                 }
 501
 502                 $addr = $contact['addr'];
 503                 if (!strlen($addr)) {
 504                         return;
 505                 }
 506
 507                 if (!in_array($cmd, [self::POST, self::POKE])) {
 508                         return;
 509                 }
 510
 511                 if ($target_item['verb'] != Activity::POST) {
 512                         return;
 513                 }
 514
 515                 if (!empty($thr_parent['object'])) {
 516                         $data = json_decode($thr_parent['object'], true);
 517                         if (!empty($data['reply_to'])) {
 518                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 519                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 520                         } elseif (!empty($data['from'])) {
 521                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 522                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 523                         }
 524                 }
 525
 526                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 527                 if (!DBA::isResult($local_user)) {
 528                         return;
 529                 }
 530
 531                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 532
 533                 $reply_to = '';
 534                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 535                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 536                         $reply_to = $mailacct['reply_to'];
 537                 }
 538
 539                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 540
 541                 // only expose our real email address to true friends
 542
 543                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 544                         if ($reply_to) {
 545                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 546                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 547                         } else {
 548                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 549                         }
 550                 } else {
 551                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <noreply@' . DI::baseUrl()->getHostname() . '>' . "\n";
 552                 }
 553
 554                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 555
 556                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 557                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 558
 559                         // Export more references on deeper nested threads
 560                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 561                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 562                         }
 563
 564                         $headers .= "\n";
 565
 566                         if (empty($target_item['title'])) {
 567                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 568                                 $title = Model\Item::selectFirst(['title'], $condition);
 569
 570                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 571                                         $subject = $title['title'];
 572                                 } else {
 573                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 574                                         $title = Model\Item::selectFirst(['title'], $condition);
 575
 576                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 577                                                 $subject = $title['title'];
 578                                         }
 579                                 }
 580                         }
 581
 582                         if (strncasecmp($subject, 'RE:', 3)) {
 583                                 $subject = 'Re: ' . $subject;
 584                         }
 585                 }
 586
 587                 Email::send($addr, $subject, $headers, $target_item);
 588
 589                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::MAIL);
 590
 591                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 592         }
 593 }