src/Worker/Delivery.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Worker;
  23
  24 use Friendica\Core\Logger;
  25 use Friendica\Core\Protocol;
  26 use Friendica\Database\DBA;
  27 use Friendica\DI;
  28 use Friendica\Model;
  29 use Friendica\Protocol\DFRN;
  30 use Friendica\Protocol\Diaspora;
  31 use Friendica\Protocol\Email;
  32 use Friendica\Protocol\Activity;
  33 use Friendica\Util\Strings;
  34 use Friendica\Util\Network;
  35 use Friendica\Core\Worker;
  36 use Friendica\Model\FContact;
  37
  38 class Delivery
  39 {
  40         const MAIL          = 'mail';
  41         const SUGGESTION    = 'suggest';
  42         const RELOCATION    = 'relocate';
  43         const DELETION      = 'drop';
  44         const POST          = 'wall-new';
  45         const POKE          = 'poke';
  46         const UPLINK        = 'uplink';
  47         const REMOVAL       = 'removeme';
  48         const PROFILEUPDATE = 'profileupdate';
  49
  50         public static function execute($cmd, $target_id, $contact_id)
  51         {
  52                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id, 'contact' => $contact_id]);
  53
  54                 $top_level = false;
  55                 $followup = false;
  56                 $public_message = false;
  57
  58                 $items = [];
  59                 if ($cmd == self::MAIL) {
  60                         $target_item = DBA::selectFirst('mail', [], ['id' => $target_id]);
  61                         if (!DBA::isResult($target_item)) {
  62                                 return;
  63                         }
  64                         $uid = $target_item['uid'];
  65                 } elseif ($cmd == self::SUGGESTION) {
  66                         $target_item = DBA::selectFirst('fsuggest', [], ['id' => $target_id]);
  67                         if (!DBA::isResult($target_item)) {
  68                                 return;
  69                         }
  70                         $uid = $target_item['uid'];
  71                 } elseif ($cmd == self::RELOCATION) {
  72                         $uid = $target_id;
  73                         $target_item = [];
  74                 } else {
  75                         $item = Model\Item::selectFirst(['parent'], ['id' => $target_id]);
  76                         if (!DBA::isResult($item) || empty($item['parent'])) {
  77                                 return;
  78                         }
  79                         $parent_id = intval($item['parent']);
  80
  81                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true, 'moderated' => false];
  82                         $params = ['order' => ['id']];
  83                         $itemdata = Model\Item::select([], $condition, $params);
  84
  85                         while ($item = Model\Item::fetch($itemdata)) {
  86                                 if ($item['id'] == $parent_id) {
  87                                         $parent = $item;
  88                                 }
  89                                 if ($item['id'] == $target_id) {
  90                                         $target_item = $item;
  91                                 }
  92                                 $items[] = $item;
  93                         }
  94                         DBA::close($itemdata);
  95
  96                         if (empty($target_item)) {
  97                                 Logger::log('Item ' . $target_id . "wasn't found. Quitting here.");
  98                                 return;
  99                         }
 100
 101                         if (empty($parent)) {
 102                                 Logger::log('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
 103                                 self::setFailedQueue($cmd, $target_item);
 104                                 return;
 105                         }
 106
 107                         if (!empty($target_item['contact-uid'])) {
 108                                 $uid = $target_item['contact-uid'];
 109                         } elseif (!empty($target_item['uid'])) {
 110                                 $uid = $target_item['uid'];
 111                         } else {
 112                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 113                                 self::setFailedQueue($cmd, $target_item);
 114                                 return;
 115                         }
 116
 117                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 118                         $thr_parent = Model\Item::selectFirst(['network', 'object'], $condition);
 119                         if (!DBA::isResult($thr_parent)) {
 120                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 121                                 // That's totally okay for what we use this variable here.
 122                                 $thr_parent = $parent;
 123                         }
 124
 125                         if (!empty($contact_id) && Model\Contact::isArchived($contact_id)) {
 126                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 127                                 self::setFailedQueue($cmd, $target_item);
 128                                 return;
 129                         }
 130
 131                         // avoid race condition with deleting entries
 132                         if ($items[0]['deleted']) {
 133                                 foreach ($items as $item) {
 134                                         $item['deleted'] = 1;
 135                                 }
 136                         }
 137
 138                         // When commenting too fast after delivery, a post wasn't recognized as top level post.
 139                         // The count then showed more than one entry. The additional check should help.
 140                         // The check for the "count" should be superfluous, but I'm not totally sure by now, so we keep it.
 141                         if ((($parent['id'] == $target_id) || (count($items) == 1)) && ($parent['uri'] === $parent['parent-uri'])) {
 142                                 Logger::log('Top level post');
 143                                 $top_level = true;
 144                         }
 145
 146                         // This is IMPORTANT!!!!
 147
 148                         // We will only send a "notify owner to relay" or followup message if the referenced post
 149                         // originated on our system by virtue of having our hostname somewhere
 150                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 151                         // if $parent['wall'] == 1 we will already have the parent message in our array
 152                         // and we will relay the whole lot.
 153
 154                         $localhost = DI::baseUrl()->getHostname();
 155                         if (strpos($localhost, ':')) {
 156                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 157                         }
 158                         /**
 159                          *
 160                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 161                          * have been known to cause runaway conditions which affected several servers, along with
 162                          * permissions issues.
 163                          *
 164                          */
 165
 166                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 167                                 Logger::log('Followup ' . $target_item["guid"], Logger::DEBUG);
 168                                 // local followup to remote post
 169                                 $followup = true;
 170                         }
 171
 172                         if (empty($parent['allow_cid'])
 173                                 && empty($parent['allow_gid'])
 174                                 && empty($parent['deny_cid'])
 175                                 && empty($parent['deny_gid'])
 176                                 && ($parent["private"] != Model\Item::PRIVATE)) {
 177                                 $public_message = true;
 178                         }
 179                 }
 180
 181                 if (empty($items)) {
 182                         Logger::log('No delivery data for  ' . $cmd . ' - Item ID: ' .$target_id . ' - Contact ID: ' . $contact_id);
 183                 }
 184
 185                 $owner = Model\User::getOwnerDataById($uid);
 186                 if (!DBA::isResult($owner)) {
 187                         self::setFailedQueue($cmd, $target_item);
 188                         return;
 189                 }
 190
 191                 // We don't deliver our items to blocked or pending contacts, and not to ourselves either
 192                 $contact = DBA::selectFirst('contact', [],
 193                         ['id' => $contact_id, 'blocked' => false, 'pending' => false, 'self' => false]
 194                 );
 195                 if (!DBA::isResult($contact)) {
 196                         self::setFailedQueue($cmd, $target_item);
 197                         return;
 198                 }
 199
 200                 if (Network::isUrlBlocked($contact['url'])) {
 201                         self::setFailedQueue($cmd, $target_item);
 202                         return;
 203                 }
 204
 205                 // Transmit via Diaspora if the thread had started as Diaspora post.
 206                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 207                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 208                 if (!empty($parent) && !empty($thr_parent) && in_array(Protocol::DIASPORA, [$parent['network'], $thr_parent['network']])) {
 209                         $contact['network'] = Protocol::DIASPORA;
 210                 }
 211
 212                 // Ensure that local contacts are delivered locally
 213                 if (Model\Contact::isLocal($contact['url'])) {
 214                         $contact['network'] = Protocol::DFRN;
 215                 }
 216
 217                 Logger::notice('Delivering', ['cmd' => $cmd, 'target' => $target_id, 'followup' => $followup, 'network' => $contact['network']]);
 218
 219                 switch ($contact['network']) {
 220                         case Protocol::DFRN:
 221                                 self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 222                                 break;
 223
 224                         case Protocol::DIASPORA:
 225                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 226                                 break;
 227
 228                         case Protocol::MAIL:
 229                                 self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 230                                 break;
 231
 232                         default:
 233                                 break;
 234                 }
 235
 236                 return;
 237         }
 238
 239         /**
 240          * Increased the "failed" counter in the item delivery data
 241          *
 242          * @param string $cmd  Command
 243          * @param array  $item Item array
 244          */
 245         private static function setFailedQueue(string $cmd, array $item)
 246         {
 247                 if (!in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 248                         return;
 249                 }
 250
 251                 Model\Post\DeliveryData::incrementQueueFailed($item['uri-id'] ?? $item['id']);
 252         }
 253
 254         /**
 255          * Deliver content via DFRN
 256          *
 257          * @param string  $cmd            Command
 258          * @param array   $contact        Contact record of the receiver
 259          * @param array   $owner          Owner record of the sender
 260          * @param array   $items          Item record of the content and the parent
 261          * @param array   $target_item    Item record of the content
 262          * @param boolean $public_message Is the content public?
 263          * @param boolean $top_level      Is it a thread starter?
 264          * @param boolean $followup       Is it an answer to a remote post?
 265          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 266          * @throws \ImagickException
 267          */
 268         private static function deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 269         {
 270                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 271                 if (Diaspora::isReshare($target_item['body']) && !empty(FContact::getByURL($contact['addr'], false))) {
 272                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 273                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 274                         return;
 275                 }
 276
 277                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 278
 279                 if ($cmd == self::MAIL) {
 280                         $item = $target_item;
 281                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 282                         $atom = DFRN::mail($item, $owner);
 283                 } elseif ($cmd == self::SUGGESTION) {
 284                         $item = $target_item;
 285                         $atom = DFRN::fsuggest($item, $owner);
 286                         DBA::delete('fsuggest', ['id' => $item['id']]);
 287                 } elseif ($cmd == self::RELOCATION) {
 288                         $atom = DFRN::relocate($owner, $owner['uid']);
 289                 } elseif ($followup) {
 290                         $msgitems = [$target_item];
 291                         $atom = DFRN::entries($msgitems, $owner);
 292                 } else {
 293                         $msgitems = [];
 294                         foreach ($items as $item) {
 295                                 // Only add the parent when we don't delete other items.
 296                                 if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 297                                         $item["entry:comment-allow"] = true;
 298                                         $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 299                                         $msgitems[] = $item;
 300                                 }
 301                         }
 302                         $atom = DFRN::entries($msgitems, $owner);
 303                 }
 304
 305                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 306
 307                 // perform local delivery if we are on the same site
 308                 if (Model\Contact::isLocal($contact['url'])) {
 309                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 310                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 311                         if (!DBA::isResult($target_self)) {
 312                                 return;
 313                         }
 314                         $target_uid = $target_self['uid'];
 315
 316                         // Check if the user has got this contact
 317                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 318                         if (!$cid) {
 319                                 // Otherwise there should be a public contact
 320                                 $cid = Model\Contact::getIdForURL($owner['url']);
 321                                 if (!$cid) {
 322                                         return;
 323                                 }
 324                         }
 325
 326                         $target_importer = DFRN::getImporter($cid, $target_uid);
 327                         if (empty($target_importer)) {
 328                                 // This should never happen
 329                                 return;
 330                         }
 331
 332                         DFRN::import($atom, $target_importer);
 333
 334                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 335                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::DFRN);
 336                         }
 337
 338                         return;
 339                 }
 340
 341                 $protocol = Model\Post\DeliveryData::DFRN;
 342
 343                 // We don't have a relationship with contacts on a public post.
 344                 // Se we transmit with the new method and via Diaspora as a fallback
 345                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 346                         // Transmit in public if it's a relay post
 347                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 348
 349                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 350
 351                         // We never spool failed relay deliveries
 352                         if ($public_dfrn) {
 353                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 354
 355                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 356                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 357                                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 358                                         } else {
 359                                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 360                                         }
 361                                 }
 362                                 return;
 363                         }
 364
 365                         if (($deliver_status < 200) || ($deliver_status > 299)) {
 366                                 // Transmit via Diaspora if not possible via Friendica
 367                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 368                                 return;
 369                         }
 370                 } elseif ($cmd != self::RELOCATION) {
 371                         // DFRN payload over Diaspora transport layer
 372                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 373                         if ($deliver_status < 200) {
 374                                 // Legacy DFRN
 375                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 376                                 $protocol = Model\Post\DeliveryData::LEGACY_DFRN;
 377                         }
 378                 } else {
 379                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 380                         $protocol = Model\Post\DeliveryData::LEGACY_DFRN;
 381                 }
 382
 383                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 384
 385                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 386                         // We successfully delivered a message, the contact is alive
 387                         Model\Contact::unmarkForArchival($contact);
 388
 389                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 390                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 391                         }
 392                 } else {
 393                         // The message could not be delivered. We mark the contact as "dead"
 394                         Model\Contact::markForArchival($contact);
 395
 396                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 397                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 398                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 399                         }
 400                 }
 401         }
 402
 403         /**
 404          * Deliver content via Diaspora
 405          *
 406          * @param string  $cmd            Command
 407          * @param array   $contact        Contact record of the receiver
 408          * @param array   $owner          Owner record of the sender
 409          * @param array   $items          Item record of the content and the parent
 410          * @param array   $target_item    Item record of the content
 411          * @param boolean $public_message Is the content public?
 412          * @param boolean $top_level      Is it a thread starter?
 413          * @param boolean $followup       Is it an answer to a remote post?
 414          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 415          * @throws \ImagickException
 416          */
 417         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 418         {
 419                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 420                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 421
 422                 if ($public_message) {
 423                         $loc = 'public batch ' . $contact['batch'];
 424                 } else {
 425                         $loc = $contact['addr'];
 426                 }
 427
 428                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 429
 430                 if (DI::config()->get('system', 'dfrn_only') || !DI::config()->get('system', 'diaspora_enabled')) {
 431                         return;
 432                 }
 433
 434                 if ($cmd == self::MAIL) {
 435                         Diaspora::sendMail($target_item, $owner, $contact);
 436                         return;
 437                 }
 438
 439                 if ($cmd == self::SUGGESTION) {
 440                         return;
 441                 }
 442
 443                 if (!$contact['pubkey'] && !$public_message) {
 444                         return;
 445                 }
 446
 447                 if ($cmd == self::RELOCATION) {
 448                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 449                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 450                         // top-level retraction
 451                         Logger::log('diaspora retract: ' . $loc);
 452                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 453                 } elseif ($followup) {
 454                         // send comments and likes to owner to relay
 455                         Logger::log('diaspora followup: ' . $loc);
 456                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 457                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 458                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 459                         Logger::log('diaspora relay: ' . $loc);
 460                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 461                 } elseif ($top_level && !$walltowall) {
 462                         // currently no workable solution for sending walltowall
 463                         Logger::log('diaspora status: ' . $loc);
 464                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 465                 } else {
 466                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 467                         return;
 468                 }
 469
 470                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 471                         // We successfully delivered a message, the contact is alive
 472                         Model\Contact::unmarkForArchival($contact);
 473
 474                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 475                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::DIASPORA);
 476                         }
 477                 } else {
 478                         // The message could not be delivered. We mark the contact as "dead"
 479                         Model\Contact::markForArchival($contact);
 480
 481                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 482                         if ($public_message) {
 483                                 Diaspora::markRelayForArchival($contact);
 484                         }
 485
 486                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 487                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 488                                 // defer message for redelivery
 489                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 490                                         Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 491                                 }
 492                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 493                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 494                         }
 495                 }
 496         }
 497
 498         /**
 499          * Deliver content via mail
 500          *
 501          * @param string $cmd         Command
 502          * @param array  $contact     Contact record of the receiver
 503          * @param array  $owner       Owner record of the sender
 504          * @param array  $target_item Item record of the content
 505          * @param array  $thr_parent  Item record of the direct parent in the thread
 506          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 507          * @throws \ImagickException
 508          */
 509         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 510         {
 511                 if (DI::config()->get('system','dfrn_only')) {
 512                         return;
 513                 }
 514
 515                 $addr = $contact['addr'];
 516                 if (!strlen($addr)) {
 517                         return;
 518                 }
 519
 520                 if (!in_array($cmd, [self::POST, self::POKE])) {
 521                         return;
 522                 }
 523
 524                 if ($target_item['verb'] != Activity::POST) {
 525                         return;
 526                 }
 527
 528                 if (!empty($thr_parent['object'])) {
 529                         $data = json_decode($thr_parent['object'], true);
 530                         if (!empty($data['reply_to'])) {
 531                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 532                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 533                         } elseif (!empty($data['from'])) {
 534                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 535                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 536                         }
 537                 }
 538
 539                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 540                 if (!DBA::isResult($local_user)) {
 541                         return;
 542                 }
 543
 544                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 545
 546                 $reply_to = '';
 547                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 548                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 549                         $reply_to = $mailacct['reply_to'];
 550                 }
 551
 552                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 553
 554                 // only expose our real email address to true friends
 555
 556                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 557                         if ($reply_to) {
 558                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 559                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 560                         } else {
 561                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 562                         }
 563                 } else {
 564                         $sender = DI::config()->get('config', 'sender_email', 'noreply@' . DI::baseUrl()->getHostname());
 565                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <' . $sender . '>' . "\n";
 566                 }
 567
 568                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 569
 570                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 571                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 572
 573                         // Export more references on deeper nested threads
 574                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 575                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 576                         }
 577
 578                         $headers .= "\n";
 579
 580                         if (empty($target_item['title'])) {
 581                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 582                                 $title = Model\Item::selectFirst(['title'], $condition);
 583
 584                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 585                                         $subject = $title['title'];
 586                                 } else {
 587                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 588                                         $title = Model\Item::selectFirst(['title'], $condition);
 589
 590                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 591                                                 $subject = $title['title'];
 592                                         }
 593                                 }
 594                         }
 595
 596                         if (strncasecmp($subject, 'RE:', 3)) {
 597                                 $subject = 'Re: ' . $subject;
 598                         }
 599                 }
 600
 601                 Email::send($addr, $subject, $headers, $target_item);
 602
 603                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::MAIL);
 604
 605                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 606         }
 607 }