src/Protocol/Delivery.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, 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\Database;
  30 use Friendica\Database\DBA;
  31 use Friendica\DI;
  32 use Friendica\Model\Contact;
  33 use Friendica\Model\GServer;
  34 use Friendica\Model\Item;
  35 use Friendica\Model\Post;
  36 use Friendica\Model\User;
  37 use Friendica\Util\Network;
  38
  39 class Delivery
  40 {
  41         const MAIL          = 'mail';
  42         const SUGGESTION    = 'suggest';
  43         const RELOCATION    = 'relocate';
  44         const DELETION      = 'drop';
  45         const POST          = 'wall-new';
  46         const REMOVAL       = 'removeme';
  47         const PROFILEUPDATE = 'profileupdate';
  48
  49         /**
  50          * Deliver posts to other systems
  51          *
  52          * @param string $cmd
  53          * @param integer $post_uriid
  54          * @param integer $contact_id
  55          * @param integer $sender_uid
  56          * @return bool "false" on remote system error. "true" when delivery was successful or we shouldn't retry.
  57          */
  58         public static function deliver(string $cmd, int $post_uriid, int $contact_id, int $sender_uid = 0): bool
  59         {
  60                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $post_uriid, 'sender_uid' => $sender_uid, 'contact' => $contact_id]);
  61
  62                 $top_level      = false;
  63                 $followup       = false;
  64                 $public_message = false;
  65
  66                 $items = [];
  67                 if ($cmd == self::MAIL) {
  68                         $target_item = DBA::selectFirst('mail', [], ['id' => $post_uriid]);
  69                         if (!DBA::isResult($target_item)) {
  70                                 return true;
  71                         }
  72                         $uid = $target_item['uid'];
  73                 } elseif ($cmd == self::SUGGESTION) {
  74                         try {
  75                                 $target_item = DI::fsuggest()->selectOneById($post_uriid)->toArray();
  76                         } catch (FriendSuggestNotFoundException $e) {
  77                                 DI::logger()->info('Cannot find FriendSuggestion', ['id' => $post_uriid]);
  78                                 return true;
  79                         }
  80                         $uid = $target_item['uid'];
  81                 } elseif ($cmd == self::RELOCATION) {
  82                         $uid         = $post_uriid;
  83                         $target_item = [];
  84                 } else {
  85                         $item = Post::selectFirst(['id', 'parent'], ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
  86                         if (!DBA::isResult($item) || empty($item['parent'])) {
  87                                 Logger::warning('Post not found', ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
  88                                 return true;
  89                         }
  90                         $target_id = intval($item['id']);
  91                         $parent_id = intval($item['parent']);
  92
  93                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true];
  94                         $params    = ['order' => ['id']];
  95                         $itemdata  = Post::select(Item::DELIVER_FIELDLIST, $condition, $params);
  96
  97                         while ($item = Post::fetch($itemdata)) {
  98                                 if ($item['verb'] == Activity::ANNOUNCE) {
  99                                         continue;
 100                                 }
 101
 102                                 if ($item['id'] == $parent_id) {
 103                                         $parent = $item;
 104                                 }
 105                                 if ($item['id'] == $target_id) {
 106                                         $target_item = $item;
 107                                 }
 108                                 $items[] = $item;
 109                         }
 110                         DBA::close($itemdata);
 111
 112                         if (empty($target_item)) {
 113                                 Logger::warning("No target item data. Quitting here.", ['id' => $target_id]);
 114                                 return true;
 115                         }
 116
 117                         if (empty($parent)) {
 118                                 Logger::warning('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
 119                                 self::setFailedQueue($cmd, $target_item);
 120                                 return true;
 121                         }
 122
 123                         if (!empty($target_item['contact-uid'])) {
 124                                 $uid = $target_item['contact-uid'];
 125                         } elseif (!empty($target_item['uid'])) {
 126                                 $uid = $target_item['uid'];
 127                         } else {
 128                                 Logger::info('Only public users for item ' . $target_id);
 129                                 self::setFailedQueue($cmd, $target_item);
 130                                 return true;
 131                         }
 132
 133                         $condition  = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 134                         $thr_parent = Post::selectFirst(['network', 'object'], $condition);
 135                         if (!DBA::isResult($thr_parent)) {
 136                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 137                                 // That's totally okay for what we use this variable here.
 138                                 $thr_parent = $parent;
 139                         }
 140
 141                         if (!empty($contact_id) && Contact::isArchived($contact_id)) {
 142                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 143                                 self::setFailedQueue($cmd, $target_item);
 144                                 return true;
 145                         }
 146
 147                         // avoid race condition with deleting entries
 148                         if ($items[0]['deleted']) {
 149                                 foreach ($items as $item) {
 150                                         $item['deleted'] = 1;
 151                                 }
 152                         }
 153
 154                         $top_level = $target_item['gravity'] == Item::GRAVITY_PARENT;
 155
 156                         // This is IMPORTANT!!!!
 157
 158                         // We will only send a "notify owner to relay" or followup message if the referenced post
 159                         // originated on our system by virtue of having our hostname somewhere
 160                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 161                         // if $parent['wall'] == 1 we will already have the parent message in our array
 162                         // and we will relay the whole lot.
 163
 164                         $localhost = DI::baseUrl()->getHost();
 165                         if (strpos($localhost, ':')) {
 166                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 167                         }
 168                         /**
 169                          *
 170                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 171                          * have been known to cause runaway conditions which affected several servers, along with
 172                          * permissions issues.
 173                          *
 174                          */
 175
 176                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 177                                 Logger::info('Followup ' . $target_item["guid"]);
 178                                 // local followup to remote post
 179                                 $followup = true;
 180                         }
 181
 182                         if (empty($parent['allow_cid'])
 183                                 && empty($parent['allow_gid'])
 184                                 && empty($parent['deny_cid'])
 185                                 && empty($parent['deny_gid'])
 186                                 && ($parent['private'] != Item::PRIVATE)) {
 187                                 $public_message = true;
 188                         }
 189                 }
 190
 191                 if (empty($items)) {
 192                         Logger::warning('No delivery data', ['command' => $cmd, 'uri-id' => $post_uriid, 'cid' => $contact_id]);
 193                 }
 194
 195                 $owner = User::getOwnerDataById($uid);
 196                 if (!DBA::isResult($owner)) {
 197                         self::setFailedQueue($cmd, $target_item);
 198                         return true;
 199                 }
 200
 201                 // We don't deliver our items to blocked, archived or pending contacts, and not to ourselves either
 202                 $contact = DBA::selectFirst('contact', [],
 203                         ['id' => $contact_id, 'archive' => false, 'blocked' => false, 'pending' => false, 'self' => false]
 204                 );
 205                 if (!DBA::isResult($contact)) {
 206                         self::setFailedQueue($cmd, $target_item);
 207                         return true;
 208                 }
 209
 210                 if (Network::isUrlBlocked($contact['url'])) {
 211                         self::setFailedQueue($cmd, $target_item);
 212                         return true;
 213                 }
 214
 215                 $protocol = GServer::getProtocol($contact['gsid'] ?? 0);
 216
 217                 // Transmit via Diaspora if the thread had started as Diaspora post.
 218                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 219                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 220                 // Also transmit relayed posts from Diaspora contacts via Diaspora.
 221                 if (($contact['network'] != Protocol::DIASPORA) && in_array(Protocol::DIASPORA, [$parent['network'] ?? '', $thr_parent['network'] ?? '', $target_item['network'] ?? ''])) {
 222                         Logger::info('Enforcing the Diaspora protocol', ['id' => $contact['id'], 'network' => $contact['network'], 'parent' => $parent['network'], 'thread-parent' => $thr_parent['network'], 'post' => $target_item['network']]);
 223                         $contact['network'] = Protocol::DIASPORA;
 224                 }
 225
 226                 Logger::notice('Delivering', ['cmd' => $cmd, 'uri-id' => $post_uriid, 'followup' => $followup, 'network' => $contact['network']]);
 227
 228                 switch ($contact['network']) {
 229                         case Protocol::DFRN:
 230                                 $success = self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup, $protocol);
 231                                 break;
 232
 233                         case Protocol::DIASPORA:
 234                                 $success = self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 235                                 break;
 236
 237                         case Protocol::MAIL:
 238                                 $success = self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 239                                 break;
 240
 241                         default:
 242                                 $success = true;
 243                                 break;
 244                 }
 245
 246                 return $success;
 247         }
 248
 249         /**
 250          * Increased the "failed" counter in the item delivery data
 251          *
 252          * @param string $cmd  Command
 253          * @param array  $item Item array
 254          *
 255          * @return void
 256          */
 257         private static function setFailedQueue(string $cmd, array $item)
 258         {
 259                 if ($cmd != Delivery::POST) {
 260                         return;
 261                 }
 262
 263                 Post\DeliveryData::incrementQueueFailed($item['uri-id'] ?? $item['id']);
 264         }
 265
 266         /**
 267          * Deliver content via DFRN
 268          *
 269          * @param string   $cmd             Command
 270          * @param array    $contact         Contact record of the receiver
 271          * @param array    $owner           Owner record of the sender
 272          * @param array    $items           Item record of the content and the parent
 273          * @param array    $target_item     Item record of the content
 274          * @param boolean  $public_message  Is the content public?
 275          * @param boolean  $top_level       Is it a thread starter?
 276          * @param boolean  $followup        Is it an answer to a remote post?
 277          * @param int|null $server_protocol The protocol of the server
 278          *
 279          * @return bool "false" on remote system error. "true" when delivery was successful or we shouldn't retry.
 280          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 281          * @throws \ImagickException
 282          */
 283         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): bool
 284         {
 285                 $target_item_id = $target_item['guid'] ?? '' ?: $target_item['id'] ?? null;
 286
 287                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 288                 if (Diaspora::getReshareDetails($target_item) && Diaspora::isSupportedByContactUrl($contact['addr'])) {
 289                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => $target_item_id]);
 290                         return self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 291                 }
 292
 293                 Logger::info('Deliver ' . ($target_item_id ?? 'relocation') . ' via DFRN to ' . ($contact['addr'] ?? '' ?: $contact['url']));
 294
 295                 if ($cmd == self::MAIL) {
 296                         $item         = $target_item;
 297                         $item['body'] = Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 298                         $atom         = DFRN::mail($item, $owner);
 299                 } elseif ($cmd == self::SUGGESTION) {
 300                         $item = $target_item;
 301                         $atom = DFRN::fsuggest($item, $owner);
 302                         DI::fsuggest()->delete(new FriendSuggests([DI::fsuggest()->selectOneById($item['id'])]));
 303                 } elseif ($cmd == self::RELOCATION) {
 304                         $atom = DFRN::relocate($owner, $owner['uid']);
 305                 } elseif ($followup) {
 306                         $msgitems = [$target_item];
 307                         $atom     = DFRN::entries($msgitems, $owner);
 308                 } else {
 309                         if ($target_item['deleted']) {
 310                                 $msgitems = [$target_item];
 311                         } else {
 312                                 $msgitems = [];
 313                                 foreach ($items as $item) {
 314                                         // Only add the parent when we don't delete other items.
 315                                         if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 316                                                 $item['entry:comment-allow'] = true;
 317                                                 $item['entry:cid']           = ($top_level ? $contact['id'] : 0);
 318                                                 $msgitems[]                  = $item;
 319                                         }
 320                                 }
 321                         }
 322                         $atom = DFRN::entries($msgitems, $owner);
 323                 }
 324
 325                 Logger::debug('Notifier entry: ' . $contact['url'] . ' ' . ($target_item_id ?? 'relocation') . ' entry: ' . $atom);
 326
 327                 $protocol = Post\DeliveryData::DFRN;
 328
 329                 // We don't have a relationship with contacts on a public post.
 330                 // Se we transmit with the new method and via Diaspora as a fallback
 331                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 332                         // Transmit in public if it's a relay post
 333                         $public_dfrn = ($contact['contact-type'] == Contact::TYPE_RELAY);
 334
 335                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 336
 337                         // We never spool failed relay deliveries
 338                         if ($public_dfrn) {
 339                                 Logger::info('Relay delivery to ' . $contact['url'] . ' with guid ' . $target_item['guid'] . ' returns ' . $deliver_status);
 340
 341                                 if ($cmd == Delivery::POST) {
 342                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 343                                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 344
 345                                                 GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 346                                                 $success = true;
 347                                         } else {
 348                                                 Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 349                                                 $success = false;
 350                                         }
 351                                 }
 352                                 return $success;
 353                         }
 354
 355                         if ((($deliver_status < 200) || ($deliver_status > 299)) && (empty($server_protocol) || ($server_protocol == Post\DeliveryData::LEGACY_DFRN))) {
 356                                 // Transmit via Diaspora if not possible via Friendica
 357                                 return self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 358                         }
 359                 } else {
 360                         // DFRN payload over Diaspora transport layer
 361                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 362                 }
 363
 364                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => $target_item_id, 'return' => $deliver_status]);
 365
 366                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 367                         // We successfully delivered a message, the contact is alive
 368                         Contact::unmarkForArchival($contact);
 369
 370                         GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 371
 372                         if ($cmd == Delivery::POST) {
 373                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 374                         }
 375                         $success = true;
 376                 } else {
 377                         // The message could not be delivered. We mark the contact as "dead"
 378                         Contact::markForArchival($contact);
 379
 380                         Logger::info('Delivery failed: defer message', ['id' => $target_item_id]);
 381                         if (!Worker::defer() && $cmd == Delivery::POST) {
 382                                 Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 383                         }
 384                         $success = false;
 385                 }
 386                 return $success;
 387         }
 388
 389         /**
 390          * Deliver content via Diaspora
 391          *
 392          * @param string  $cmd            Command
 393          * @param array   $contact        Contact record of the receiver
 394          * @param array   $owner          Owner record of the sender
 395          * @param array   $items          Item record of the content and the parent
 396          * @param array   $target_item    Item record of the content
 397          * @param boolean $public_message Is the content public?
 398          * @param boolean $top_level      Is it a thread starter?
 399          * @param boolean $followup       Is it an answer to a remote post?
 400          *
 401          * @return bool "false" on remote system error. "true" when delivery was successful or we shouldn't retry.
 402          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 403          * @throws \ImagickException
 404          */
 405         private static function deliverDiaspora(string $cmd, array $contact, array $owner, array $items, array $target_item, bool $public_message, bool $top_level, bool $followup): bool
 406         {
 407                 // We don't treat group posts as "wall-to-wall" to be able to post them via Diaspora
 408                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY);
 409
 410                 if ($public_message) {
 411                         $loc = 'public batch ' . $contact['batch'];
 412                 } else {
 413                         $loc = $contact['addr'];
 414                 }
 415
 416                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 417
 418                 if (!DI::config()->get('system', 'diaspora_enabled')) {
 419                         return true;
 420                 }
 421
 422                 if ($cmd == self::MAIL) {
 423                         $deliver_status = Diaspora::sendMail($target_item, $owner, $contact);
 424                         return ($deliver_status >= 200) && ($deliver_status <= 299);
 425                 }
 426
 427                 if ($cmd == self::SUGGESTION) {
 428                         return true;
 429                 }
 430
 431                 if (!$contact['pubkey'] && !$public_message) {
 432                         return true;
 433                 }
 434
 435                 if ($cmd == self::RELOCATION) {
 436                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 437                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 438                         // top-level retraction
 439                         Logger::notice('diaspora retract: ' . $loc);
 440                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 441                 } elseif ($followup) {
 442                         // send comments and likes to owner to relay
 443                         Logger::notice('diaspora followup: ' . $loc);
 444                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 445                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 446                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 447                         Logger::notice('diaspora relay: ' . $loc);
 448                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 449                 } elseif ($top_level && !$walltowall) {
 450                         // currently no workable solution for sending walltowall
 451                         Logger::notice('diaspora status: ' . $loc);
 452                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 453                 } else {
 454                         Logger::warning('Unknown mode', ['command' => $cmd, 'target' => $loc]);
 455                         return true;
 456                 }
 457
 458                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 459                         // We successfully delivered a message, the contact is alive
 460                         Contact::unmarkForArchival($contact);
 461
 462                         GServer::setProtocol($contact['gsid'] ?? 0, Post\DeliveryData::DIASPORA);
 463
 464                         if ($cmd == Delivery::POST) {
 465                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::DIASPORA);
 466                         }
 467                         $success = true;
 468                 } else {
 469                         // The message could not be delivered. We mark the contact as "dead"
 470                         Contact::markForArchival($contact);
 471
 472                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 473                         if ($public_message) {
 474                                 Relay::markForArchival($contact);
 475                         }
 476
 477                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Contact::TYPE_RELAY)) {
 478                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 479                                 // defer message for redelivery
 480                                 if (!Worker::defer() && $cmd == Delivery::POST) {
 481                                         Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 482                                 }
 483                         } elseif ($cmd == Delivery::POST) {
 484                                 Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 485                         }
 486                         $success = false;
 487                 }
 488                 return $success;
 489         }
 490
 491         /**
 492          * Deliver content via mail
 493          *
 494          * @param string $cmd         Command
 495          * @param array  $contact     Contact record of the receiver
 496          * @param array  $owner       Owner record of the sender
 497          * @param array  $target_item Item record of the content
 498          * @param array  $thr_parent  Item record of the direct parent in the thread
 499          *
 500          * @return bool "false" on remote system error. "true" when delivery was successful or we shouldn't retry.
 501          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 502          * @throws \ImagickException
 503          */
 504         private static function deliverMail(string $cmd, array $contact, array $owner, array $target_item, array $thr_parent): bool
 505         {
 506                 if (DI::config()->get('system', 'imap_disabled')) {
 507                         return true;
 508                 }
 509
 510                 $addr = $contact['addr'];
 511                 if (!strlen($addr)) {
 512                         return true;
 513                 }
 514
 515                 if ($cmd != self::POST) {
 516                         return true;
 517                 }
 518
 519                 if ($target_item['verb'] != Activity::POST) {
 520                         return true;
 521                 }
 522
 523                 if (!empty($thr_parent['object'])) {
 524                         $data = json_decode($thr_parent['object'], true);
 525                         if (!empty($data['reply_to'])) {
 526                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 527                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 528                         } elseif (!empty($data['from'])) {
 529                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 530                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 531                         }
 532                 }
 533
 534                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 535                 if (!DBA::isResult($local_user)) {
 536                         return true;
 537                 }
 538
 539                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 540
 541                 $reply_to = '';
 542                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 543                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 544                         $reply_to = $mailacct['reply_to'];
 545                 }
 546
 547                 $subject = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 548
 549                 // only expose our real email address to true friends
 550
 551                 if (($contact['rel'] == Contact::FRIEND) && !$contact['blocked']) {
 552                         if ($reply_to) {
 553                                 $headers = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 554                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 555                         } else {
 556                                 $headers = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 557                         }
 558                 } else {
 559                         $sender  = DI::config()->get('config', 'sender_email', 'noreply@' . DI::baseUrl()->getHost());
 560                         $headers = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <' . $sender . '>' . "\n";
 561                 }
 562
 563                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 564
 565                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 566                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 567
 568                         // Export more references on deeper nested threads
 569                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 570                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 571                         }
 572
 573                         $headers .= "\n";
 574
 575                         if (empty($target_item['title'])) {
 576                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 577                                 $title     = Post::selectFirst(['title'], $condition);
 578
 579                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 580                                         $subject = $title['title'];
 581                                 } else {
 582                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 583                                         $title     = Post::selectFirst(['title'], $condition);
 584
 585                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 586                                                 $subject = $title['title'];
 587                                         }
 588                                 }
 589                         }
 590
 591                         if (strncasecmp($subject, 'RE:', 3)) {
 592                                 $subject = 'Re: ' . $subject;
 593                         }
 594                 }
 595
 596                 // Try to send email
 597                 $success = Email::send($addr, $subject, $headers, $target_item);
 598
 599                 if ($success) {
 600                         // Success
 601                         Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::MAIL);
 602                         Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 603                 } else {
 604                         // Failed
 605                         Logger::warning('Delivery of mail has FAILED', ['to' => $addr, 'subject' => $subject, 'guid' => $target_item['guid']]);
 606                 }
 607                 return $success;
 608         }
 609 }