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, $followup)
 253         {
 254                 // Skip transmitting the announce via DFRN when it had already been done via AP
 255                 if (ActivityPub\Transmitter::isAnnounce($target_item) && !empty(Model\APContact::getByURL($contact['url'], false))) {
 256                         Logger::info('Announce had already been transmitted', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 257                         return;
 258                 }
 259
 260                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 261                 if (Diaspora::isReshare($target_item['body']) && !empty(Diaspora::personByHandle(contact['addr'], false))) {
 262                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 263                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 264                         return;
 265                 }
 266
 267                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 268
 269                 if ($cmd == self::MAIL) {
 270                         $item = $target_item;
 271                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 272                         $atom = DFRN::mail($item, $owner);
 273                 } elseif ($cmd == self::SUGGESTION) {
 274                         $item = $target_item;
 275                         $atom = DFRN::fsuggest($item, $owner);
 276                         DBA::delete('fsuggest', ['id' => $item['id']]);
 277                 } elseif ($cmd == self::RELOCATION) {
 278                         $atom = DFRN::relocate($owner, $owner['uid']);
 279                 } elseif ($followup) {
 280                         $msgitems = [$target_item];
 281                         $atom = DFRN::entries($msgitems, $owner);
 282                 } else {
 283                         $msgitems = [];
 284                         foreach ($items as $item) {
 285                                 // Only add the parent when we don't delete other items.
 286                                 if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 287                                         $item["entry:comment-allow"] = true;
 288                                         $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 289                                         $msgitems[] = $item;
 290                                 }
 291                         }
 292                         $atom = DFRN::entries($msgitems, $owner);
 293                 }
 294
 295                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 296
 297                 $basepath =  implode('/', array_slice(explode('/', $contact['url']), 0, 3));
 298
 299                 // perform local delivery if we are on the same site
 300
 301                 if (Strings::compareLink($basepath, System::baseUrl())) {
 302                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 303                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 304                         if (!DBA::isResult($target_self)) {
 305                                 return;
 306                         }
 307                         $target_uid = $target_self['uid'];
 308
 309                         // Check if the user has got this contact
 310                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 311                         if (!$cid) {
 312                                 // Otherwise there should be a public contact
 313                                 $cid = Model\Contact::getIdForURL($owner['url']);
 314                                 if (!$cid) {
 315                                         return;
 316                                 }
 317                         }
 318
 319                         $target_importer = DFRN::getImporter($cid, $target_uid);
 320                         if (empty($target_importer)) {
 321                                 // This should never happen
 322                                 return;
 323                         }
 324
 325                         DFRN::import($atom, $target_importer);
 326
 327                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 328                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DFRN);
 329                         }
 330
 331                         return;
 332                 }
 333
 334                 $protocol = Model\ItemDeliveryData::DFRN;
 335
 336                 // We don't have a relationship with contacts on a public post.
 337                 // Se we transmit with the new method and via Diaspora as a fallback
 338                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 339                         // Transmit in public if it's a relay post
 340                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 341
 342                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 343
 344                         // We never spool failed relay deliveries
 345                         if ($public_dfrn) {
 346                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 347
 348                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 349                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 350                                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 351                                         } else {
 352                                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 353                                         }
 354                                 }
 355                                 return;
 356                         }
 357
 358                         if (($deliver_status < 200) || ($deliver_status > 299)) {
 359                                 // Transmit via Diaspora if not possible via Friendica
 360                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 361                                 return;
 362                         }
 363                 } elseif ($cmd != self::RELOCATION) {
 364                         // DFRN payload over Diaspora transport layer
 365                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 366                         if ($deliver_status < 200) {
 367                                 // Legacy DFRN
 368                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 369                                 $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 370                         }
 371                 } else {
 372                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 373                         $protocol = Model\ItemDeliveryData::LEGACY_DFRN;
 374                 }
 375
 376                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 377
 378                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 379                         // We successfully delivered a message, the contact is alive
 380                         Model\Contact::unmarkForArchival($contact);
 381
 382                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 383                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], $protocol);
 384                         }
 385                 } else {
 386                         // The message could not be delivered. We mark the contact as "dead"
 387                         Model\Contact::markForArchival($contact);
 388
 389                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 390                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 391                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 392                         }
 393                 }
 394         }
 395
 396         /**
 397          * @brief Deliver content via Diaspora
 398          *
 399          * @param string  $cmd            Command
 400          * @param array   $contact        Contact record of the receiver
 401          * @param array   $owner          Owner record of the sender
 402          * @param array   $items          Item record of the content and the parent
 403          * @param array   $target_item    Item record of the content
 404          * @param boolean $public_message Is the content public?
 405          * @param boolean $top_level      Is it a thread starter?
 406          * @param boolean $followup       Is it an answer to a remote post?
 407          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 408          * @throws \ImagickException
 409          */
 410         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 411         {
 412                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 413                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 414
 415                 if ($public_message) {
 416                         $loc = 'public batch ' . $contact['batch'];
 417                 } else {
 418                         $loc = $contact['addr'];
 419                 }
 420
 421                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 422
 423                 if (Config::get('system', 'dfrn_only') || !Config::get('system', 'diaspora_enabled')) {
 424                         return;
 425                 }
 426
 427                 if ($cmd == self::MAIL) {
 428                         Diaspora::sendMail($target_item, $owner, $contact);
 429                         return;
 430                 }
 431
 432                 if ($cmd == self::SUGGESTION) {
 433                         return;
 434                 }
 435
 436                 if (!$contact['pubkey'] && !$public_message) {
 437                         return;
 438                 }
 439
 440                 if ($cmd == self::RELOCATION) {
 441                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 442                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 443                         // top-level retraction
 444                         Logger::log('diaspora retract: ' . $loc);
 445                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 446                 } elseif ($followup) {
 447                         // send comments and likes to owner to relay
 448                         Logger::log('diaspora followup: ' . $loc);
 449                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 450                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 451                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 452                         Logger::log('diaspora relay: ' . $loc);
 453                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 454                 } elseif ($top_level && !$walltowall) {
 455                         // currently no workable solution for sending walltowall
 456                         Logger::log('diaspora status: ' . $loc);
 457                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 458                 } else {
 459                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 460                         return;
 461                 }
 462
 463                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 464                         // We successfully delivered a message, the contact is alive
 465                         Model\Contact::unmarkForArchival($contact);
 466
 467                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 468                                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::DIASPORA);
 469                         }
 470                 } else {
 471                         // The message could not be delivered. We mark the contact as "dead"
 472                         Model\Contact::markForArchival($contact);
 473
 474                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 475                         if ($public_message) {
 476                                 Diaspora::markRelayForArchival($contact);
 477                         }
 478
 479                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 480                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 481                                 // defer message for redelivery
 482                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 483                                         Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 484                                 }
 485                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 486                                 Model\ItemDeliveryData::incrementQueueFailed($target_item['id']);
 487                         }
 488                 }
 489         }
 490
 491         /**
 492          * @brief Deliver content via mail
 493          *
 494          * @param string $cmd         Command
 495          * @param array  $contact     Contact record of the receiver
 496          * @param array  $owner       Owner record of the sender
 497          * @param array  $target_item Item record of the content
 498          * @param array  $thr_parent  Item record of the direct parent in the thread
 499          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 500          * @throws \ImagickException
 501          */
 502         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 503         {
 504                 if (Config::get('system','dfrn_only')) {
 505                         return;
 506                 }
 507
 508                 $addr = $contact['addr'];
 509                 if (!strlen($addr)) {
 510                         return;
 511                 }
 512
 513                 if (!in_array($cmd, [self::POST, self::POKE])) {
 514                         return;
 515                 }
 516
 517                 if ($target_item['verb'] != Activity::POST) {
 518                         return;
 519                 }
 520
 521                 if (!empty($thr_parent['object'])) {
 522                         $data = json_decode($thr_parent['object'], true);
 523                         if (!empty($data['reply_to'])) {
 524                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 525                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 526                         } elseif (!empty($data['from'])) {
 527                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 528                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 529                         }
 530                 }
 531
 532                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 533                 if (!DBA::isResult($local_user)) {
 534                         return;
 535                 }
 536
 537                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 538
 539                 $reply_to = '';
 540                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 541                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 542                         $reply_to = $mailacct['reply_to'];
 543                 }
 544
 545                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : L10n::t("\x28no subject\x29"));
 546
 547                 // only expose our real email address to true friends
 548
 549                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 550                         if ($reply_to) {
 551                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 552                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 553                         } else {
 554                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 555                         }
 556                 } else {
 557                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <noreply@' . self::getApp()->getHostName() . '>' . "\n";
 558                 }
 559
 560                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 561
 562                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 563                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 564
 565                         // Export more references on deeper nested threads
 566                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 567                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 568                         }
 569
 570                         $headers .= "\n";
 571
 572                         if (empty($target_item['title'])) {
 573                                 $condition = ['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                                 } else {
 579                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 580                                         $title = Model\Item::selectFirst(['title'], $condition);
 581
 582                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 583                                                 $subject = $title['title'];
 584                                         }
 585                                 }
 586                         }
 587
 588                         if (strncasecmp($subject, 'RE:', 3)) {
 589                                 $subject = 'Re: ' . $subject;
 590                         }
 591                 }
 592
 593                 Email::send($addr, $subject, $headers, $target_item);
 594
 595                 Model\ItemDeliveryData::incrementQueueDone($target_item['id'], Model\ItemDeliveryData::MAIL);
 596
 597                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 598         }
 599 }