src/Worker/Delivery.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   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\Contact\FriendSuggest\Collection\FriendSuggests;
  25 use Friendica\Contact\FriendSuggest\Exception\FriendSuggestNotFoundException;
  26 use Friendica\Core\Logger;
  27 use Friendica\Core\Protocol;
  28 use Friendica\Core\Worker;
  29 use Friendica\Database\DBA;
  30 use Friendica\DI;
  31 use Friendica\Model\Contact;
  32 use Friendica\Model\GServer;
  33 use Friendica\Model\Item;
  34 use Friendica\Model\Post;
  35 use Friendica\Model\User;
  36 use Friendica\Protocol\Activity;
  37 use Friendica\Protocol\DFRN;
  38 use Friendica\Protocol\Diaspora;
  39 use Friendica\Protocol\Email;
  40 use Friendica\Protocol\Relay;
  41 use Friendica\Util\Network;
  42
  43 class Delivery
  44 {
  45         const MAIL          = 'mail';
  46         const SUGGESTION    = 'suggest';
  47         const RELOCATION    = 'relocate';
  48         const DELETION      = 'drop';
  49         const POST          = 'wall-new';
  50         const REMOVAL       = 'removeme';
  51         const PROFILEUPDATE = 'profileupdate';
  52
  53         public static function execute(string $cmd, int $post_uriid, int $contact_id, int $sender_uid = 0)
  54         {
  55                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $post_uriid, 'sender_uid' => $sender_uid, 'contact' => $contact_id]);
  56
  57                 $top_level = false;
  58                 $followup = false;
  59                 $public_message = false;
  60
  61                 $items = [];
  62                 if ($cmd == self::MAIL) {
  63                         $target_item = DBA::selectFirst('mail', [], ['id' => $post_uriid]);
  64                         if (!DBA::isResult($target_item)) {
  65                                 return;
  66                         }
  67                         $uid = $target_item['uid'];
  68                 } elseif ($cmd == self::SUGGESTION) {
  69                         try {
  70                                 $target_item = DI::fsuggest()->selectOneById($post_uriid)->toArray();
  71                         } catch (FriendSuggestNotFoundException $e) {
  72                                 DI::logger()->info('Cannot find FriendSuggestion', ['id' => $post_uriid]);
  73                                 return;
  74                         }
  75                         $uid = $target_item['uid'];
  76                 } elseif ($cmd == self::RELOCATION) {
  77                         $uid = $post_uriid;
  78                         $target_item = [];
  79                 } else {
  80                         $item = Post::selectFirst(['id', 'parent'], ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
  81                         if (!DBA::isResult($item) || empty($item['parent'])) {
  82                                 Logger::warning('Post not found', ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
  83                                 return;
  84                         }
  85                         $target_id = intval($item['id']);
  86                         $parent_id = intval($item['parent']);
  87
  88                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true];
  89                         $params = ['order' => ['id']];
  90                         $itemdata = Post::select(Item::DELIVER_FIELDLIST, $condition, $params);
  91
  92                         while ($item = Post::fetch($itemdata)) {
  93                                 if ($item['verb'] == Activity::ANNOUNCE) {
  94                                         continue;
  95                                 }
  96
  97                                 if ($item['id'] == $parent_id) {
  98                                         $parent = $item;
  99                                 }
 100                                 if ($item['id'] == $target_id) {
 101                                         $target_item = $item;
 102                                 }
 103                                 $items[] = $item;
 104                         }
 105                         DBA::close($itemdata);
 106
 107                         if (empty($target_item)) {
 108                                 Logger::warning("No target item data. Quitting here.", ['id' => $target_id]);
 109                                 return;
 110                         }
 111
 112                         if (empty($parent)) {
 113                                 Logger::warning('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
 114                                 self::setFailedQueue($cmd, $target_item);
 115                                 return;
 116                         }
 117
 118                         if (!empty($target_item['contact-uid'])) {
 119                                 $uid = $target_item['contact-uid'];
 120                         } elseif (!empty($target_item['uid'])) {
 121                                 $uid = $target_item['uid'];
 122                         } else {
 123                                 Logger::info('Only public users for item ' . $target_id);
 124                                 self::setFailedQueue($cmd, $target_item);
 125                                 return;
 126                         }
 127
 128                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 129                         $thr_parent = Post::selectFirst(['network', 'object'], $condition);
 130                         if (!DBA::isResult($thr_parent)) {
 131                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 132                                 // That's totally okay for what we use this variable here.
 133                                 $thr_parent = $parent;
 134                         }
 135
 136                         if (!empty($contact_id) && Contact::isArchived($contact_id)) {
 137                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 138                                 self::setFailedQueue($cmd, $target_item);
 139                                 return;
 140                         }
 141
 142                         // avoid race condition with deleting entries
 143                         if ($items[0]['deleted']) {
 144                                 foreach ($items as $item) {
 145                                         $item['deleted'] = 1;
 146                                 }
 147                         }
 148
 149                         $top_level = $target_item['gravity'] == Item::GRAVITY_PARENT;
 150
 151                         // This is IMPORTANT!!!!
 152
 153                         // We will only send a "notify owner to relay" or followup message if the referenced post
 154                         // originated on our system by virtue of having our hostname somewhere
 155                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 156                         // if $parent['wall'] == 1 we will already have the parent message in our array
 157                         // and we will relay the whole lot.
 158
 159                         $localhost = DI::baseUrl()->getHostname();
 160                         if (strpos($localhost, ':')) {
 161                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 162                         }
 163                         /**
 164                          *
 165                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 166                          * have been known to cause runaway conditions which affected several servers, along with
 167                          * permissions issues.
 168                          *
 169                          */
 170
 171                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 172                                 Logger::info('Followup ' . $target_item["guid"]);
 173                                 // local followup to remote post
 174                                 $followup = true;
 175                         }
 176
 177                         if (empty($parent['allow_cid'])
 178                                 && empty($parent['allow_gid'])
 179                                 && empty($parent['deny_cid'])
 180                                 && empty($parent['deny_gid'])
 181                                 && ($parent['private'] != Item::PRIVATE)) {
 182                                 $public_message = true;
 183                         }
 184                 }
 185
 186                 if (empty($items)) {
 187                         Logger::warning('No delivery data', ['command' => $cmd, 'uri-id' => $post_uriid, 'cid' => $contact_id]);
 188                 }
 189
 190                 $owner = User::getOwnerDataById($uid);
 191                 if (!DBA::isResult($owner)) {
 192                         self::setFailedQueue($cmd, $target_item);
 193                         return;
 194                 }
 195
 196                 // We don't deliver our items to blocked, archived or pending contacts, and not to ourselves either
 197                 $contact = DBA::selectFirst('contact', [],
 198                         ['id' => $contact_id, 'archive' => false, 'blocked' => false, 'pending' => false, 'self' => false]
 199                 );
 200                 if (!DBA::isResult($contact)) {
 201                         self::setFailedQueue($cmd, $target_item);
 202                         return;
 203                 }
 204
 205                 if (Network::isUrlBlocked($contact['url'])) {
 206                         self::setFailedQueue($cmd, $target_item);
 207                         return;
 208                 }
 209
 210                 $protocol = GServer::getProtocol($contact['gsid'] ?? 0);
 211
 212                 // Transmit via Diaspora if the thread had started as Diaspora post.
 213                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 214                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 215                 // Also transmit relayed posts from Diaspora contacts via Diaspora.
 216                 if (($contact['network'] != Protocol::DIASPORA) && in_array(Protocol::DIASPORA, [$parent['network'] ?? '', $thr_parent['network'] ?? '', $target_item['network']] ?? '')) {
 217                         Logger::info('Enforcing the Diaspora protocol', ['id' => $contact['id'], 'network' => $contact['network'], 'parent' => $parent['network'], 'thread-parent' => $thr_parent['network'], 'post' => $target_item['network']]);
 218                         $contact['network'] = Protocol::DIASPORA;
 219                 }
 220
 221                 Logger::notice('Delivering', ['cmd' => $cmd, 'uri-id' => $post_uriid, 'followup' => $followup, 'network' => $contact['network']]);
 222
 223                 switch ($contact['network']) {
 224                         case Protocol::DFRN:
 225                                 self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup, $protocol);
 226                                 break;
 227
 228                         case Protocol::DIASPORA:
 229                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 230                                 break;
 231
 232                         case Protocol::MAIL:
 233                                 self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 234                                 break;
 235
 236                         default:
 237                                 break;
 238                 }
 239
 240                 return;
 241         }
 242
 243         /**
 244          * Increased the "failed" counter in the item delivery data
 245          *
 246          * @param string $cmd  Command
 247          * @param array  $item Item array
 248          *
 249          * @return void
 250          */
 251         private static function setFailedQueue(string $cmd, array $item)
 252         {
 253                 if ($cmd != Delivery::POST) {
 254                         return;
 255                 }
 256
 257                 Post\DeliveryData::incrementQueueFailed($item['uri-id'] ?? $item['id']);
 258         }
 259
 260         /**
 261          * Deliver content via DFRN
 262          *
 263          * @param string   $cmd             Command
 264          * @param array    $contact         Contact record of the receiver
 265          * @param array    $owner           Owner record of the sender
 266          * @param array    $items           Item record of the content and the parent
 267          * @param array    $target_item     Item record of the content
 268          * @param boolean  $public_message  Is the content public?
 269          * @param boolean  $top_level       Is it a thread starter?
 270          * @param boolean  $followup        Is it an answer to a remote post?
 271          * @param int|null $server_protocol The protocol of the server
 272          *
 273          * @return void
 274          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 275          * @throws \ImagickException
 276          */
 277         private static function deliverDFRN(string $cmd, array $contact, array $owner, array $items, array $target_item, bool $public_message, bool $top_level, bool $followup, int $server_protocol = null)
 278         {
 279                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 280                 if (Diaspora::getReshareDetails($target_item ?? []) && Diaspora::isSupportedByContactUrl($contact['addr'])) {
 281                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 282                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 283                         return;
 284                 }
 285
 286                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 287
 288                 if ($cmd == self::MAIL) {
 289                         $item = $target_item;
 290                         $item['body'] = Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 291                         $atom = DFRN::mail($item, $owner);
 292                 } elseif ($cmd == self::SUGGESTION) {
 293                         $item = $target_item;
 294                         $atom = DFRN::fsuggest($item, $owner);
 295                         DI::fsuggest()->delete(new FriendSuggests([DI::fsuggest()->selectOneById($item['id'])]));
 296                 } elseif ($cmd == self::RELOCATION) {
 297                         $atom = DFRN::relocate($owner, $owner['uid']);
 298                 } elseif ($followup) {
 299                         $msgitems = [$target_item];
 300                         $atom = DFRN::entries($msgitems, $owner);
 301                 } else {
 302                         if ($target_item['deleted']) {
 303                                 $msgitems = [$target_item];
 304                         } else {
 305                                 $msgitems = [];
 306                                 foreach ($items as $item) {
 307                                         // Only add the parent when we don't delete other items.
 308                                         if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 309                                                 $item['entry:comment-allow'] = true;
 310                                                 $item['entry:cid'] = ($top_level ? $contact['id'] : 0);
 311                                                 $msgitems[] = $item;
 312                                         }
 313                                 }
 314                         }
 315                         $atom = DFRN::entries($msgitems, $owner);
 316                 }
 317
 318                 Logger::debug('Notifier entry: ' . $contact['url'] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 319
 320                 $protocol = Post\DeliveryData::DFRN;
 321
 322                 // We don't have a relationship with contacts on a public post.
 323                 // Se we transmit with the new method and via Diaspora as a fallback
 324                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 325                         // Transmit in public if it's a relay post
 326                         $public_dfrn = ($contact['contact-type'] == Contact::TYPE_RELAY);
 327
 328                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 329
 330                         // We never spool failed relay deliveries
 331                         if ($public_dfrn) {
 332                                 Logger::info('Relay delivery to ' . $contact['url'] . ' with guid ' . $target_item['guid'] . ' returns ' . $deliver_status);
 333
 334                                 if ($cmd == Delivery::POST) {
 335                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 336                                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 337
 338                                                 GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 339                                         } else {
 340                                                 Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 341                                         }
 342                                 }
 343                                 return;
 344                         }
 345
 346                         if ((($deliver_status < 200) || ($deliver_status > 299)) && (empty($server_protocol) || ($server_protocol == Post\DeliveryData::LEGACY_DFRN))) {
 347                                 // Transmit via Diaspora if not possible via Friendica
 348                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 349                                 return;
 350                         }
 351                 } else {
 352                         // DFRN payload over Diaspora transport layer
 353                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 354                 }
 355
 356                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 357
 358                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 359                         // We successfully delivered a message, the contact is alive
 360                         Contact::unmarkForArchival($contact);
 361
 362                         GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 363
 364                         if ($cmd == Delivery::POST) {
 365                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 366                         }
 367                 } else {
 368                         // The message could not be delivered. We mark the contact as "dead"
 369                         Contact::markForArchival($contact);
 370
 371                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 372                         if (!Worker::defer() && $cmd == Delivery::POST) {
 373                                 Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 374                         }
 375                 }
 376         }
 377
 378         /**
 379          * Deliver content via Diaspora
 380          *
 381          * @param string  $cmd            Command
 382          * @param array   $contact        Contact record of the receiver
 383          * @param array   $owner          Owner record of the sender
 384          * @param array   $items          Item record of the content and the parent
 385          * @param array   $target_item    Item record of the content
 386          * @param boolean $public_message Is the content public?
 387          * @param boolean $top_level      Is it a thread starter?
 388          * @param boolean $followup       Is it an answer to a remote post?
 389          *
 390          * @return void
 391          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 392          * @throws \ImagickException
 393          */
 394         private static function deliverDiaspora(string $cmd, array $contact, array $owner, array $items, array $target_item, bool $public_message, bool $top_level, bool $followup)
 395         {
 396                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 397                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY);
 398
 399                 if ($public_message) {
 400                         $loc = 'public batch ' . $contact['batch'];
 401                 } else {
 402                         $loc = $contact['addr'];
 403                 }
 404
 405                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 406
 407                 if (!DI::config()->get('system', 'diaspora_enabled')) {
 408                         return;
 409                 }
 410
 411                 if ($cmd == self::MAIL) {
 412                         Diaspora::sendMail($target_item, $owner, $contact);
 413                         return;
 414                 }
 415
 416                 if ($cmd == self::SUGGESTION) {
 417                         return;
 418                 }
 419
 420                 if (!$contact['pubkey'] && !$public_message) {
 421                         return;
 422                 }
 423
 424                 if ($cmd == self::RELOCATION) {
 425                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 426                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 427                         // top-level retraction
 428                         Logger::notice('diaspora retract: ' . $loc);
 429                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 430                 } elseif ($followup) {
 431                         // send comments and likes to owner to relay
 432                         Logger::notice('diaspora followup: ' . $loc);
 433                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 434                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 435                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 436                         Logger::notice('diaspora relay: ' . $loc);
 437                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 438                 } elseif ($top_level && !$walltowall) {
 439                         // currently no workable solution for sending walltowall
 440                         Logger::notice('diaspora status: ' . $loc);
 441                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 442                 } else {
 443                         Logger::warning('Unknown mode', ['command' => $cmd, 'target' => $loc]);
 444                         return;
 445                 }
 446
 447                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 448                         // We successfully delivered a message, the contact is alive
 449                         Contact::unmarkForArchival($contact);
 450
 451                         GServer::setProtocol($contact['gsid'] ?? 0, Post\DeliveryData::DIASPORA);
 452
 453                         if ($cmd == Delivery::POST) {
 454                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::DIASPORA);
 455                         }
 456                 } else {
 457                         // The message could not be delivered. We mark the contact as "dead"
 458                         Contact::markForArchival($contact);
 459
 460                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 461                         if ($public_message) {
 462                                 Relay::markForArchival($contact);
 463                         }
 464
 465                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Contact::TYPE_RELAY)) {
 466                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 467                                 // defer message for redelivery
 468                                 if (!Worker::defer() && $cmd == Delivery::POST) {
 469                                         Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 470                                 }
 471                         } elseif ($cmd == Delivery::POST) {
 472                                 Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 473                         }
 474                 }
 475         }
 476
 477         /**
 478          * Deliver content via mail
 479          *
 480          * @param string $cmd         Command
 481          * @param array  $contact     Contact record of the receiver
 482          * @param array  $owner       Owner record of the sender
 483          * @param array  $target_item Item record of the content
 484          * @param array  $thr_parent  Item record of the direct parent in the thread
 485          *
 486          * @return void
 487          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 488          * @throws \ImagickException
 489          */
 490         private static function deliverMail(string $cmd, array $contact, array $owner, array $target_item, array $thr_parent)
 491         {
 492                 if (DI::config()->get('system', 'imap_disabled')) {
 493                         return;
 494                 }
 495
 496                 $addr = $contact['addr'];
 497                 if (!strlen($addr)) {
 498                         return;
 499                 }
 500
 501                 if ($cmd != self::POST) {
 502                         return;
 503                 }
 504
 505                 if ($target_item['verb'] != Activity::POST) {
 506                         return;
 507                 }
 508
 509                 if (!empty($thr_parent['object'])) {
 510                         $data = json_decode($thr_parent['object'], true);
 511                         if (!empty($data['reply_to'])) {
 512                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 513                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 514                         } elseif (!empty($data['from'])) {
 515                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 516                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 517                         }
 518                 }
 519
 520                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 521                 if (!DBA::isResult($local_user)) {
 522                         return;
 523                 }
 524
 525                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 526
 527                 $reply_to = '';
 528                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 529                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 530                         $reply_to = $mailacct['reply_to'];
 531                 }
 532
 533                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 534
 535                 // only expose our real email address to true friends
 536
 537                 if (($contact['rel'] == Contact::FRIEND) && !$contact['blocked']) {
 538                         if ($reply_to) {
 539                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 540                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 541                         } else {
 542                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 543                         }
 544                 } else {
 545                         $sender = DI::config()->get('config', 'sender_email', 'noreply@' . DI::baseUrl()->getHostname());
 546                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <' . $sender . '>' . "\n";
 547                 }
 548
 549                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 550
 551                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 552                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 553
 554                         // Export more references on deeper nested threads
 555                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 556                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 557                         }
 558
 559                         $headers .= "\n";
 560
 561                         if (empty($target_item['title'])) {
 562                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 563                                 $title = Post::selectFirst(['title'], $condition);
 564
 565                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 566                                         $subject = $title['title'];
 567                                 } else {
 568                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 569                                         $title = Post::selectFirst(['title'], $condition);
 570
 571                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 572                                                 $subject = $title['title'];
 573                                         }
 574                                 }
 575                         }
 576
 577                         if (strncasecmp($subject, 'RE:', 3)) {
 578                                 $subject = 'Re: ' . $subject;
 579                         }
 580                 }
 581
 582                 // Try to send email
 583                 $success = Email::send($addr, $subject, $headers, $target_item);
 584
 585                 if ($success) {
 586                         // Success
 587                         Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::MAIL);
 588                         Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 589                 } else {
 590                         // Failed
 591                         Logger::warning('Delivery of mail has FAILED', ['to' => $addr, 'subject' => $subject, 'guid' => $target_item['guid']]);
 592                 }
 593         }
 594 }