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