src/Worker/Delivery.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Worker;
  23
  24 use Friendica\Core\Logger;
  25 use Friendica\Core\Protocol;
  26 use Friendica\Database\DBA;
  27 use Friendica\DI;
  28 use Friendica\Model;
  29 use Friendica\Protocol\DFRN;
  30 use Friendica\Protocol\Diaspora;
  31 use Friendica\Protocol\Email;
  32 use Friendica\Protocol\Activity;
  33 use Friendica\Util\Strings;
  34 use Friendica\Util\Network;
  35 use Friendica\Core\Worker;
  36 use Friendica\Model\Conversation;
  37 use Friendica\Model\FContact;
  38 use Friendica\Model\Item;
  39 use Friendica\Protocol\Relay;
  40
  41 class Delivery
  42 {
  43         const MAIL          = 'mail';
  44         const SUGGESTION    = 'suggest';
  45         const RELOCATION    = 'relocate';
  46         const DELETION      = 'drop';
  47         const POST          = 'wall-new';
  48         const POKE          = 'poke';
  49         const UPLINK        = 'uplink';
  50         const REMOVAL       = 'removeme';
  51         const PROFILEUPDATE = 'profileupdate';
  52
  53         public static function execute($cmd, $target_id, $contact_id)
  54         {
  55                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id, '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' => $target_id]);
  64                         if (!DBA::isResult($target_item)) {
  65                                 return;
  66                         }
  67                         $uid = $target_item['uid'];
  68                 } elseif ($cmd == self::SUGGESTION) {
  69                         $target_item = DBA::selectFirst('fsuggest', [], ['id' => $target_id]);
  70                         if (!DBA::isResult($target_item)) {
  71                                 return;
  72                         }
  73                         $uid = $target_item['uid'];
  74                 } elseif ($cmd == self::RELOCATION) {
  75                         $uid = $target_id;
  76                         $target_item = [];
  77                 } else {
  78                         $item = Model\Post::selectFirst(['parent'], ['id' => $target_id]);
  79                         if (!DBA::isResult($item) || empty($item['parent'])) {
  80                                 return;
  81                         }
  82                         $parent_id = intval($item['parent']);
  83
  84                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true];
  85                         $params = ['order' => ['id']];
  86                         $itemdata = Model\Post::select(Item::DELIVER_FIELDLIST, $condition, $params);
  87
  88                         while ($item = Model\Post::fetch($itemdata)) {
  89                                 if ($item['verb'] == Activity::ANNOUNCE) {
  90                                         continue;
  91                                 }
  92
  93                                 if ($item['id'] == $parent_id) {
  94                                         $parent = $item;
  95                                 }
  96                                 if ($item['id'] == $target_id) {
  97                                         $target_item = $item;
  98                                 }
  99                                 $items[] = $item;
 100                         }
 101                         DBA::close($itemdata);
 102
 103                         if (empty($target_item)) {
 104                                 Logger::log('Item ' . $target_id . "wasn't found. Quitting here.");
 105                                 return;
 106                         }
 107
 108                         if (empty($parent)) {
 109                                 Logger::log('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
 110                                 self::setFailedQueue($cmd, $target_item);
 111                                 return;
 112                         }
 113
 114                         if (!empty($target_item['contact-uid'])) {
 115                                 $uid = $target_item['contact-uid'];
 116                         } elseif (!empty($target_item['uid'])) {
 117                                 $uid = $target_item['uid'];
 118                         } else {
 119                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 120                                 self::setFailedQueue($cmd, $target_item);
 121                                 return;
 122                         }
 123
 124                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 125                         $thr_parent = Model\Post::selectFirst(['network', 'object'], $condition);
 126                         if (!DBA::isResult($thr_parent)) {
 127                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 128                                 // That's totally okay for what we use this variable here.
 129                                 $thr_parent = $parent;
 130                         }
 131
 132                         if (!empty($contact_id) && Model\Contact::isArchived($contact_id)) {
 133                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 134                                 self::setFailedQueue($cmd, $target_item);
 135                                 return;
 136                         }
 137
 138                         // avoid race condition with deleting entries
 139                         if ($items[0]['deleted']) {
 140                                 foreach ($items as $item) {
 141                                         $item['deleted'] = 1;
 142                                 }
 143                         }
 144
 145                         $top_level = $target_item['gravity'] == GRAVITY_PARENT;
 146
 147                         // This is IMPORTANT!!!!
 148
 149                         // We will only send a "notify owner to relay" or followup message if the referenced post
 150                         // originated on our system by virtue of having our hostname somewhere
 151                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 152                         // if $parent['wall'] == 1 we will already have the parent message in our array
 153                         // and we will relay the whole lot.
 154
 155                         $localhost = DI::baseUrl()->getHostname();
 156                         if (strpos($localhost, ':')) {
 157                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 158                         }
 159                         /**
 160                          *
 161                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 162                          * have been known to cause runaway conditions which affected several servers, along with
 163                          * permissions issues.
 164                          *
 165                          */
 166
 167                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 168                                 Logger::log('Followup ' . $target_item["guid"], Logger::DEBUG);
 169                                 // local followup to remote post
 170                                 $followup = true;
 171                         }
 172
 173                         if (empty($parent['allow_cid'])
 174                                 && empty($parent['allow_gid'])
 175                                 && empty($parent['deny_cid'])
 176                                 && empty($parent['deny_gid'])
 177                                 && ($parent["private"] != Model\Item::PRIVATE)) {
 178                                 $public_message = true;
 179                         }
 180                 }
 181
 182                 if (empty($items)) {
 183                         Logger::log('No delivery data for  ' . $cmd . ' - Item ID: ' .$target_id . ' - Contact ID: ' . $contact_id);
 184                 }
 185
 186                 $owner = Model\User::getOwnerDataById($uid);
 187                 if (!DBA::isResult($owner)) {
 188                         self::setFailedQueue($cmd, $target_item);
 189                         return;
 190                 }
 191
 192                 // We don't deliver our items to blocked, archived or pending contacts, and not to ourselves either
 193                 $contact = DBA::selectFirst('contact', [],
 194                         ['id' => $contact_id, 'archive' => false, 'blocked' => false, 'pending' => false, 'self' => false]
 195                 );
 196                 if (!DBA::isResult($contact)) {
 197                         self::setFailedQueue($cmd, $target_item);
 198                         return;
 199                 }
 200
 201                 if (Network::isUrlBlocked($contact['url'])) {
 202                         self::setFailedQueue($cmd, $target_item);
 203                         return;
 204                 }
 205
 206                 $protocol = Model\GServer::getProtocol($contact['gsid'] ?? 0);
 207
 208                 // Transmit via Diaspora if the thread had started as Diaspora post.
 209                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 210                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 211                 // Also transmit relayed posts from Diaspora contacts via Diaspora.
 212                 if (!empty($parent) && !empty($thr_parent) && in_array(Protocol::DIASPORA, [$parent['network'], $thr_parent['network'], $target_item['network']])) {
 213                         $contact['network'] = Protocol::DIASPORA;
 214                 }
 215
 216                 // Ensure that local contacts are delivered locally
 217                 if (Model\Contact::isLocal($contact['url'])) {
 218                         $contact['network'] = Protocol::DFRN;
 219                 }
 220
 221                 Logger::notice('Delivering', ['cmd' => $cmd, 'target' => $target_id, '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         private static function setFailedQueue(string $cmd, array $item)
 250         {
 251                 if (!in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 252                         return;
 253                 }
 254
 255                 Model\Post\DeliveryData::incrementQueueFailed($item['uri-id'] ?? $item['id']);
 256         }
 257
 258         /**
 259          * Deliver content via DFRN
 260          *
 261          * @param string  $cmd             Command
 262          * @param array   $contact         Contact record of the receiver
 263          * @param array   $owner           Owner record of the sender
 264          * @param array   $items           Item record of the content and the parent
 265          * @param array   $target_item     Item record of the content
 266          * @param boolean $public_message  Is the content public?
 267          * @param boolean $top_level       Is it a thread starter?
 268          * @param boolean $followup        Is it an answer to a remote post?
 269          * @param int     $server_protocol The protocol of the server
 270          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 271          * @throws \ImagickException
 272          */
 273         private static function deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup, $server_protocol)
 274         {
 275                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 276                 if (Diaspora::isReshare($target_item['body']) && !empty(FContact::getByURL($contact['addr'], false))) {
 277                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 278                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 279                         return;
 280                 }
 281
 282                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 283
 284                 if ($cmd == self::MAIL) {
 285                         $item = $target_item;
 286                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 287                         $atom = DFRN::mail($item, $owner);
 288                 } elseif ($cmd == self::SUGGESTION) {
 289                         $item = $target_item;
 290                         $atom = DFRN::fsuggest($item, $owner);
 291                         DBA::delete('fsuggest', ['id' => $item['id']]);
 292                 } elseif ($cmd == self::RELOCATION) {
 293                         $atom = DFRN::relocate($owner, $owner['uid']);
 294                 } elseif ($followup) {
 295                         $msgitems = [$target_item];
 296                         $atom = DFRN::entries($msgitems, $owner);
 297                 } else {
 298                         if ($target_item['deleted']) {
 299                                 $msgitems = [$target_item];
 300                         } else {
 301                                 $msgitems = [];
 302                                 foreach ($items as $item) {
 303                                         // Only add the parent when we don't delete other items.
 304                                         if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 305                                                 $item["entry:comment-allow"] = true;
 306                                                 $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 307                                                 $msgitems[] = $item;
 308                                         }
 309                                 }
 310                         }
 311                         $atom = DFRN::entries($msgitems, $owner);
 312                 }
 313
 314                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 315
 316                 // perform local delivery if we are on the same site
 317                 if (Model\Contact::isLocal($contact['url'])) {
 318                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 319                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 320                         if (!DBA::isResult($target_self)) {
 321                                 return;
 322                         }
 323                         $target_uid = $target_self['uid'];
 324
 325                         // Check if the user has got this contact
 326                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 327                         if (!$cid) {
 328                                 // Otherwise there should be a public contact
 329                                 $cid = Model\Contact::getIdForURL($owner['url']);
 330                                 if (!$cid) {
 331                                         return;
 332                                 }
 333                         }
 334
 335                         $target_importer = DFRN::getImporter($cid, $target_uid);
 336                         if (empty($target_importer)) {
 337                                 // This should never happen
 338                                 return;
 339                         }
 340
 341                         DFRN::import($atom, $target_importer, Conversation::PARCEL_LOCAL_DFRN, Conversation::PUSH);
 342
 343                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 344                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::DFRN);
 345                         }
 346
 347                         return;
 348                 }
 349
 350                 $protocol = Model\Post\DeliveryData::DFRN;
 351
 352                 // We don't have a relationship with contacts on a public post.
 353                 // Se we transmit with the new method and via Diaspora as a fallback
 354                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 355                         // Transmit in public if it's a relay post
 356                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 357
 358                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 359
 360                         // We never spool failed relay deliveries
 361                         if ($public_dfrn) {
 362                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 363
 364                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 365                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 366                                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 367
 368                                                 Model\GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 369                                         } else {
 370                                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 371                                         }
 372                                 }
 373                                 return;
 374                         }
 375
 376                         if ((($deliver_status < 200) || ($deliver_status > 299)) && (empty($server_protocol) || ($server_protocol == Model\Post\DeliveryData::LEGACY_DFRN))) {
 377                                 // Transmit via Diaspora if not possible via Friendica
 378                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 379                                 return;
 380                         }
 381                 } elseif ($cmd != self::RELOCATION) {
 382                         // DFRN payload over Diaspora transport layer
 383                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 384                         if (($deliver_status < 200) && (empty($server_protocol) || ($server_protocol == Model\Post\DeliveryData::LEGACY_DFRN))) {
 385                                 // Legacy DFRN
 386                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 387                                 $protocol = Model\Post\DeliveryData::LEGACY_DFRN;
 388                         }
 389                 } else {
 390                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 391                         $protocol = Model\Post\DeliveryData::LEGACY_DFRN;
 392                 }
 393
 394                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 395
 396                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 397                         // We successfully delivered a message, the contact is alive
 398                         Model\Contact::unmarkForArchival($contact);
 399
 400                         Model\GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 401
 402                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 403                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 404                         }
 405                 } else {
 406                         // The message could not be delivered. We mark the contact as "dead"
 407                         Model\Contact::markForArchival($contact);
 408
 409                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 410                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 411                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 412                         }
 413                 }
 414         }
 415
 416         /**
 417          * Deliver content via Diaspora
 418          *
 419          * @param string  $cmd            Command
 420          * @param array   $contact        Contact record of the receiver
 421          * @param array   $owner          Owner record of the sender
 422          * @param array   $items          Item record of the content and the parent
 423          * @param array   $target_item    Item record of the content
 424          * @param boolean $public_message Is the content public?
 425          * @param boolean $top_level      Is it a thread starter?
 426          * @param boolean $followup       Is it an answer to a remote post?
 427          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 428          * @throws \ImagickException
 429          */
 430         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 431         {
 432                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 433                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 434
 435                 if ($public_message) {
 436                         $loc = 'public batch ' . $contact['batch'];
 437                 } else {
 438                         $loc = $contact['addr'];
 439                 }
 440
 441                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 442
 443                 if (DI::config()->get('system', 'dfrn_only') || !DI::config()->get('system', 'diaspora_enabled')) {
 444                         return;
 445                 }
 446
 447                 if ($cmd == self::MAIL) {
 448                         Diaspora::sendMail($target_item, $owner, $contact);
 449                         return;
 450                 }
 451
 452                 if ($cmd == self::SUGGESTION) {
 453                         return;
 454                 }
 455
 456                 if (!$contact['pubkey'] && !$public_message) {
 457                         return;
 458                 }
 459
 460                 if ($cmd == self::RELOCATION) {
 461                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 462                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 463                         // top-level retraction
 464                         Logger::log('diaspora retract: ' . $loc);
 465                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 466                 } elseif ($followup) {
 467                         // send comments and likes to owner to relay
 468                         Logger::log('diaspora followup: ' . $loc);
 469                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 470                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 471                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 472                         Logger::log('diaspora relay: ' . $loc);
 473                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 474                 } elseif ($top_level && !$walltowall) {
 475                         // currently no workable solution for sending walltowall
 476                         Logger::log('diaspora status: ' . $loc);
 477                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 478                 } else {
 479                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 480                         return;
 481                 }
 482
 483                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 484                         // We successfully delivered a message, the contact is alive
 485                         Model\Contact::unmarkForArchival($contact);
 486
 487                         Model\GServer::setProtocol($contact['gsid'] ?? 0, Model\Post\DeliveryData::DIASPORA);
 488
 489                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 490                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::DIASPORA);
 491                         }
 492                 } else {
 493                         // The message could not be delivered. We mark the contact as "dead"
 494                         Model\Contact::markForArchival($contact);
 495
 496                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 497                         if ($public_message) {
 498                                 Relay::markForArchival($contact);
 499                         }
 500
 501                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 502                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 503                                 // defer message for redelivery
 504                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 505                                         Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 506                                 }
 507                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 508                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 509                         }
 510                 }
 511         }
 512
 513         /**
 514          * Deliver content via mail
 515          *
 516          * @param string $cmd         Command
 517          * @param array  $contact     Contact record of the receiver
 518          * @param array  $owner       Owner record of the sender
 519          * @param array  $target_item Item record of the content
 520          * @param array  $thr_parent  Item record of the direct parent in the thread
 521          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 522          * @throws \ImagickException
 523          */
 524         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 525         {
 526                 if (DI::config()->get('system','dfrn_only')) {
 527                         return;
 528                 }
 529
 530                 $addr = $contact['addr'];
 531                 if (!strlen($addr)) {
 532                         return;
 533                 }
 534
 535                 if (!in_array($cmd, [self::POST, self::POKE])) {
 536                         return;
 537                 }
 538
 539                 if ($target_item['verb'] != Activity::POST) {
 540                         return;
 541                 }
 542
 543                 if (!empty($thr_parent['object'])) {
 544                         $data = json_decode($thr_parent['object'], true);
 545                         if (!empty($data['reply_to'])) {
 546                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 547                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 548                         } elseif (!empty($data['from'])) {
 549                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 550                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 551                         }
 552                 }
 553
 554                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 555                 if (!DBA::isResult($local_user)) {
 556                         return;
 557                 }
 558
 559                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 560
 561                 $reply_to = '';
 562                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 563                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 564                         $reply_to = $mailacct['reply_to'];
 565                 }
 566
 567                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 568
 569                 // only expose our real email address to true friends
 570
 571                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 572                         if ($reply_to) {
 573                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 574                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 575                         } else {
 576                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 577                         }
 578                 } else {
 579                         $sender = DI::config()->get('config', 'sender_email', 'noreply@' . DI::baseUrl()->getHostname());
 580                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <' . $sender . '>' . "\n";
 581                 }
 582
 583                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 584
 585                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 586                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 587
 588                         // Export more references on deeper nested threads
 589                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 590                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 591                         }
 592
 593                         $headers .= "\n";
 594
 595                         if (empty($target_item['title'])) {
 596                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 597                                 $title = Model\Post::selectFirst(['title'], $condition);
 598
 599                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 600                                         $subject = $title['title'];
 601                                 } else {
 602                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 603                                         $title = Model\Post::selectFirst(['title'], $condition);
 604
 605                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 606                                                 $subject = $title['title'];
 607                                         }
 608                                 }
 609                         }
 610
 611                         if (strncasecmp($subject, 'RE:', 3)) {
 612                                 $subject = 'Re: ' . $subject;
 613                         }
 614                 }
 615
 616                 Email::send($addr, $subject, $headers, $target_item);
 617
 618                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::MAIL);
 619
 620                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 621         }
 622 }