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\Model\Post;
  40 use Friendica\Protocol\Relay;
  41
  42 class Delivery
  43 {
  44         const MAIL          = 'mail';
  45         const SUGGESTION    = 'suggest';
  46         const RELOCATION    = 'relocate';
  47         const DELETION      = 'drop';
  48         const POST          = 'wall-new';
  49         const POKE          = 'poke';
  50         const UPLINK        = 'uplink';
  51         const REMOVAL       = 'removeme';
  52         const PROFILEUPDATE = 'profileupdate';
  53
  54         public static function execute(string $cmd, int $post_uriid, int $contact_id, int $sender_uid = 0)
  55         {
  56                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $post_uriid, 'sender_uid' => $sender_uid, 'contact' => $contact_id]);
  57
  58                 $target_id = $post_uriid;
  59
  60                 if (!empty($sender_uid)) {
  61                         $post = Post::selectFirst(['id'], ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
  62                         if (!DBA::isResult($post)) {
  63                                 Logger::warning('Post not found', ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
  64                                 return;
  65                         }
  66                         $target_id = $post['id'];
  67                 } elseif (!in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION])) {
  68                         $post = Post::selectFirst(['id', 'uid', 'uri-id'], ['item-id' => $post_uriid]);
  69                         if (DBA::isResult($post)) {
  70                                 $target_id = $post['id'];
  71                                 $sender_uid = $post['uid'];
  72                                 $post_uriid = $post['uri-id'];
  73                         }
  74                 }
  75
  76                 $top_level = false;
  77                 $followup = false;
  78                 $public_message = false;
  79
  80                 $items = [];
  81                 if ($cmd == self::MAIL) {
  82                         $target_item = DBA::selectFirst('mail', [], ['id' => $target_id]);
  83                         if (!DBA::isResult($target_item)) {
  84                                 return;
  85                         }
  86                         $uid = $target_item['uid'];
  87                 } elseif ($cmd == self::SUGGESTION) {
  88                         $target_item = DBA::selectFirst('fsuggest', [], ['id' => $target_id]);
  89                         if (!DBA::isResult($target_item)) {
  90                                 return;
  91                         }
  92                         $uid = $target_item['uid'];
  93                 } elseif ($cmd == self::RELOCATION) {
  94                         $uid = $target_id;
  95                         $target_item = [];
  96                 } else {
  97                         $item = Model\Post::selectFirst(['parent'], ['id' => $target_id]);
  98                         if (!DBA::isResult($item) || empty($item['parent'])) {
  99                                 return;
 100                         }
 101                         $parent_id = intval($item['parent']);
 102
 103                         $condition = ['id' => [$target_id, $parent_id], 'visible' => true];
 104                         $params = ['order' => ['id']];
 105                         $itemdata = Model\Post::select(Item::DELIVER_FIELDLIST, $condition, $params);
 106
 107                         while ($item = Model\Post::fetch($itemdata)) {
 108                                 if ($item['verb'] == Activity::ANNOUNCE) {
 109                                         continue;
 110                                 }
 111
 112                                 if ($item['id'] == $parent_id) {
 113                                         $parent = $item;
 114                                 }
 115                                 if ($item['id'] == $target_id) {
 116                                         $target_item = $item;
 117                                 }
 118                                 $items[] = $item;
 119                         }
 120                         DBA::close($itemdata);
 121
 122                         if (empty($target_item)) {
 123                                 Logger::log('Item ' . $target_id . "wasn't found. Quitting here.");
 124                                 return;
 125                         }
 126
 127                         if (empty($parent)) {
 128                                 Logger::log('Parent ' . $parent_id . ' for item ' . $target_id . "wasn't found. Quitting here.");
 129                                 self::setFailedQueue($cmd, $target_item);
 130                                 return;
 131                         }
 132
 133                         if (!empty($target_item['contact-uid'])) {
 134                                 $uid = $target_item['contact-uid'];
 135                         } elseif (!empty($target_item['uid'])) {
 136                                 $uid = $target_item['uid'];
 137                         } else {
 138                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 139                                 self::setFailedQueue($cmd, $target_item);
 140                                 return;
 141                         }
 142
 143                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 144                         $thr_parent = Model\Post::selectFirst(['network', 'object'], $condition);
 145                         if (!DBA::isResult($thr_parent)) {
 146                                 // Shouldn't happen. But when this does, we just take the parent as thread parent.
 147                                 // That's totally okay for what we use this variable here.
 148                                 $thr_parent = $parent;
 149                         }
 150
 151                         if (!empty($contact_id) && Model\Contact::isArchived($contact_id)) {
 152                                 Logger::info('Contact is archived', ['id' => $contact_id, 'cmd' => $cmd, 'item' => $target_item['id']]);
 153                                 self::setFailedQueue($cmd, $target_item);
 154                                 return;
 155                         }
 156
 157                         // avoid race condition with deleting entries
 158                         if ($items[0]['deleted']) {
 159                                 foreach ($items as $item) {
 160                                         $item['deleted'] = 1;
 161                                 }
 162                         }
 163
 164                         $top_level = $target_item['gravity'] == GRAVITY_PARENT;
 165
 166                         // This is IMPORTANT!!!!
 167
 168                         // We will only send a "notify owner to relay" or followup message if the referenced post
 169                         // originated on our system by virtue of having our hostname somewhere
 170                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 171                         // if $parent['wall'] == 1 we will already have the parent message in our array
 172                         // and we will relay the whole lot.
 173
 174                         $localhost = DI::baseUrl()->getHostname();
 175                         if (strpos($localhost, ':')) {
 176                                 $localhost = substr($localhost, 0, strpos($localhost, ':'));
 177                         }
 178                         /**
 179                          *
 180                          * Be VERY CAREFUL if you make any changes to the following line. Seemingly innocuous changes
 181                          * have been known to cause runaway conditions which affected several servers, along with
 182                          * permissions issues.
 183                          *
 184                          */
 185
 186                         if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
 187                                 Logger::log('Followup ' . $target_item["guid"], Logger::DEBUG);
 188                                 // local followup to remote post
 189                                 $followup = true;
 190                         }
 191
 192                         if (empty($parent['allow_cid'])
 193                                 && empty($parent['allow_gid'])
 194                                 && empty($parent['deny_cid'])
 195                                 && empty($parent['deny_gid'])
 196                                 && ($parent["private"] != Model\Item::PRIVATE)) {
 197                                 $public_message = true;
 198                         }
 199                 }
 200
 201                 if (empty($items)) {
 202                         Logger::log('No delivery data for  ' . $cmd . ' - Item ID: ' .$target_id . ' - Contact ID: ' . $contact_id);
 203                 }
 204
 205                 $owner = Model\User::getOwnerDataById($uid);
 206                 if (!DBA::isResult($owner)) {
 207                         self::setFailedQueue($cmd, $target_item);
 208                         return;
 209                 }
 210
 211                 // We don't deliver our items to blocked, archived or pending contacts, and not to ourselves either
 212                 $contact = DBA::selectFirst('contact', [],
 213                         ['id' => $contact_id, 'archive' => false, 'blocked' => false, 'pending' => false, 'self' => false]
 214                 );
 215                 if (!DBA::isResult($contact)) {
 216                         self::setFailedQueue($cmd, $target_item);
 217                         return;
 218                 }
 219
 220                 if (Network::isUrlBlocked($contact['url'])) {
 221                         self::setFailedQueue($cmd, $target_item);
 222                         return;
 223                 }
 224
 225                 $protocol = Model\GServer::getProtocol($contact['gsid'] ?? 0);
 226
 227                 // Transmit via Diaspora if the thread had started as Diaspora post.
 228                 // Also transmit via Diaspora if this is a direct answer to a Diaspora comment.
 229                 // This is done since the uri wouldn't match (Diaspora doesn't transmit it)
 230                 // Also transmit relayed posts from Diaspora contacts via Diaspora.
 231                 if (!empty($parent) && !empty($thr_parent) && in_array(Protocol::DIASPORA, [$parent['network'], $thr_parent['network'], $target_item['network']])) {
 232                         $contact['network'] = Protocol::DIASPORA;
 233                 }
 234
 235                 // Ensure that local contacts are delivered locally
 236                 if (Model\Contact::isLocal($contact['url'])) {
 237                         $contact['network'] = Protocol::DFRN;
 238                 }
 239
 240                 Logger::notice('Delivering', ['cmd' => $cmd, 'target' => $target_id, 'followup' => $followup, 'network' => $contact['network']]);
 241
 242                 switch ($contact['network']) {
 243                         case Protocol::DFRN:
 244                                 self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup, $protocol);
 245                                 break;
 246
 247                         case Protocol::DIASPORA:
 248                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 249                                 break;
 250
 251                         case Protocol::MAIL:
 252                                 self::deliverMail($cmd, $contact, $owner, $target_item, $thr_parent);
 253                                 break;
 254
 255                         default:
 256                                 break;
 257                 }
 258
 259                 return;
 260         }
 261
 262         /**
 263          * Increased the "failed" counter in the item delivery data
 264          *
 265          * @param string $cmd  Command
 266          * @param array  $item Item array
 267          */
 268         private static function setFailedQueue(string $cmd, array $item)
 269         {
 270                 if (!in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 271                         return;
 272                 }
 273
 274                 Model\Post\DeliveryData::incrementQueueFailed($item['uri-id'] ?? $item['id']);
 275         }
 276
 277         /**
 278          * Deliver content via DFRN
 279          *
 280          * @param string  $cmd             Command
 281          * @param array   $contact         Contact record of the receiver
 282          * @param array   $owner           Owner record of the sender
 283          * @param array   $items           Item record of the content and the parent
 284          * @param array   $target_item     Item record of the content
 285          * @param boolean $public_message  Is the content public?
 286          * @param boolean $top_level       Is it a thread starter?
 287          * @param boolean $followup        Is it an answer to a remote post?
 288          * @param int     $server_protocol The protocol of the server
 289          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 290          * @throws \ImagickException
 291          */
 292         private static function deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup, $server_protocol)
 293         {
 294                 // Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
 295                 if (Diaspora::isReshare($target_item['body']) && !empty(FContact::getByURL($contact['addr'], false))) {
 296                         Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 297                         self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 298                         return;
 299                 }
 300
 301                 Logger::info('Deliver ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' via DFRN to ' . (($contact['addr'] ?? '') ?: $contact['url']));
 302
 303                 if ($cmd == self::MAIL) {
 304                         $item = $target_item;
 305                         $item['body'] = Model\Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
 306                         $atom = DFRN::mail($item, $owner);
 307                 } elseif ($cmd == self::SUGGESTION) {
 308                         $item = $target_item;
 309                         $atom = DFRN::fsuggest($item, $owner);
 310                         DBA::delete('fsuggest', ['id' => $item['id']]);
 311                 } elseif ($cmd == self::RELOCATION) {
 312                         $atom = DFRN::relocate($owner, $owner['uid']);
 313                 } elseif ($followup) {
 314                         $msgitems = [$target_item];
 315                         $atom = DFRN::entries($msgitems, $owner);
 316                 } else {
 317                         if ($target_item['deleted']) {
 318                                 $msgitems = [$target_item];
 319                         } else {
 320                                 $msgitems = [];
 321                                 foreach ($items as $item) {
 322                                         // Only add the parent when we don't delete other items.
 323                                         if (($target_item['id'] == $item['id']) || ($cmd != self::DELETION)) {
 324                                                 $item["entry:comment-allow"] = true;
 325                                                 $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
 326                                                 $msgitems[] = $item;
 327                                         }
 328                                 }
 329                         }
 330                         $atom = DFRN::entries($msgitems, $owner);
 331                 }
 332
 333                 Logger::debug('Notifier entry: ' . $contact["url"] . ' ' . (($target_item['guid'] ?? '') ?: $target_item['id']) . ' entry: ' . $atom);
 334
 335                 // perform local delivery if we are on the same site
 336                 if (Model\Contact::isLocal($contact['url'])) {
 337                         $condition = ['nurl' => Strings::normaliseLink($contact['url']), 'self' => true];
 338                         $target_self = DBA::selectFirst('contact', ['uid'], $condition);
 339                         if (!DBA::isResult($target_self)) {
 340                                 return;
 341                         }
 342                         $target_uid = $target_self['uid'];
 343
 344                         // Check if the user has got this contact
 345                         $cid = Model\Contact::getIdForURL($owner['url'], $target_uid);
 346                         if (!$cid) {
 347                                 // Otherwise there should be a public contact
 348                                 $cid = Model\Contact::getIdForURL($owner['url']);
 349                                 if (!$cid) {
 350                                         return;
 351                                 }
 352                         }
 353
 354                         $target_importer = DFRN::getImporter($cid, $target_uid);
 355                         if (empty($target_importer)) {
 356                                 // This should never happen
 357                                 return;
 358                         }
 359
 360                         DFRN::import($atom, $target_importer, Conversation::PARCEL_LOCAL_DFRN, Conversation::PUSH);
 361
 362                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 363                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::DFRN);
 364                         }
 365
 366                         return;
 367                 }
 368
 369                 $protocol = Model\Post\DeliveryData::DFRN;
 370
 371                 // We don't have a relationship with contacts on a public post.
 372                 // Se we transmit with the new method and via Diaspora as a fallback
 373                 if (!empty($items) && (($items[0]['uid'] == 0) || ($contact['uid'] == 0))) {
 374                         // Transmit in public if it's a relay post
 375                         $public_dfrn = ($contact['contact-type'] == Model\Contact::TYPE_RELAY);
 376
 377                         $deliver_status = DFRN::transmit($owner, $contact, $atom, $public_dfrn);
 378
 379                         // We never spool failed relay deliveries
 380                         if ($public_dfrn) {
 381                                 Logger::info('Relay delivery to ' . $contact["url"] . ' with guid ' . $target_item["guid"] . ' returns ' . $deliver_status);
 382
 383                                 if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 384                                         if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 385                                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 386
 387                                                 Model\GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 388                                         } else {
 389                                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 390                                         }
 391                                 }
 392                                 return;
 393                         }
 394
 395                         if ((($deliver_status < 200) || ($deliver_status > 299)) && (empty($server_protocol) || ($server_protocol == Model\Post\DeliveryData::LEGACY_DFRN))) {
 396                                 // Transmit via Diaspora if not possible via Friendica
 397                                 self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 398                                 return;
 399                         }
 400                 } elseif ($cmd != self::RELOCATION) {
 401                         // DFRN payload over Diaspora transport layer
 402                         $deliver_status = DFRN::transmit($owner, $contact, $atom);
 403                         if (($deliver_status < 200) && (empty($server_protocol) || ($server_protocol == Model\Post\DeliveryData::LEGACY_DFRN))) {
 404                                 // Legacy DFRN
 405                                 $deliver_status = DFRN::deliver($owner, $contact, $atom);
 406                                 $protocol = Model\Post\DeliveryData::LEGACY_DFRN;
 407                         }
 408                 } else {
 409                         $deliver_status = DFRN::deliver($owner, $contact, $atom);
 410                         $protocol = Model\Post\DeliveryData::LEGACY_DFRN;
 411                 }
 412
 413                 Logger::info('DFRN Delivery', ['cmd' => $cmd, 'url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id'], 'return' => $deliver_status]);
 414
 415                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 416                         // We successfully delivered a message, the contact is alive
 417                         Model\Contact::unmarkForArchival($contact);
 418
 419                         Model\GServer::setProtocol($contact['gsid'] ?? 0, $protocol);
 420
 421                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 422                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], $protocol);
 423                         }
 424                 } else {
 425                         // The message could not be delivered. We mark the contact as "dead"
 426                         Model\Contact::markForArchival($contact);
 427
 428                         Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 429                         if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 430                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 431                         }
 432                 }
 433         }
 434
 435         /**
 436          * Deliver content via Diaspora
 437          *
 438          * @param string  $cmd            Command
 439          * @param array   $contact        Contact record of the receiver
 440          * @param array   $owner          Owner record of the sender
 441          * @param array   $items          Item record of the content and the parent
 442          * @param array   $target_item    Item record of the content
 443          * @param boolean $public_message Is the content public?
 444          * @param boolean $top_level      Is it a thread starter?
 445          * @param boolean $followup       Is it an answer to a remote post?
 446          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 447          * @throws \ImagickException
 448          */
 449         private static function deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
 450         {
 451                 // We don't treat Forum posts as "wall-to-wall" to be able to post them via Diaspora
 452                 $walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Model\User::ACCOUNT_TYPE_COMMUNITY);
 453
 454                 if ($public_message) {
 455                         $loc = 'public batch ' . $contact['batch'];
 456                 } else {
 457                         $loc = $contact['addr'];
 458                 }
 459
 460                 Logger::notice('Deliver via Diaspora', ['target' => $target_item['id'], 'guid' => $target_item['guid'], 'to' => $loc]);
 461
 462                 if (DI::config()->get('system', 'dfrn_only') || !DI::config()->get('system', 'diaspora_enabled')) {
 463                         return;
 464                 }
 465
 466                 if ($cmd == self::MAIL) {
 467                         Diaspora::sendMail($target_item, $owner, $contact);
 468                         return;
 469                 }
 470
 471                 if ($cmd == self::SUGGESTION) {
 472                         return;
 473                 }
 474
 475                 if (!$contact['pubkey'] && !$public_message) {
 476                         return;
 477                 }
 478
 479                 if ($cmd == self::RELOCATION) {
 480                         $deliver_status = Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
 481                 } elseif ($target_item['deleted'] && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
 482                         // top-level retraction
 483                         Logger::log('diaspora retract: ' . $loc);
 484                         $deliver_status = Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
 485                 } elseif ($followup) {
 486                         // send comments and likes to owner to relay
 487                         Logger::log('diaspora followup: ' . $loc);
 488                         $deliver_status = Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
 489                 } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
 490                         // we are the relay - send comments, likes and relayable_retractions to our conversants
 491                         Logger::log('diaspora relay: ' . $loc);
 492                         $deliver_status = Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
 493                 } elseif ($top_level && !$walltowall) {
 494                         // currently no workable solution for sending walltowall
 495                         Logger::log('diaspora status: ' . $loc);
 496                         $deliver_status = Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
 497                 } else {
 498                         Logger::log('Unknown mode ' . $cmd . ' for ' . $loc);
 499                         return;
 500                 }
 501
 502                 if (($deliver_status >= 200) && ($deliver_status <= 299)) {
 503                         // We successfully delivered a message, the contact is alive
 504                         Model\Contact::unmarkForArchival($contact);
 505
 506                         Model\GServer::setProtocol($contact['gsid'] ?? 0, Model\Post\DeliveryData::DIASPORA);
 507
 508                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 509                                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::DIASPORA);
 510                         }
 511                 } else {
 512                         // The message could not be delivered. We mark the contact as "dead"
 513                         Model\Contact::markForArchival($contact);
 514
 515                         // When it is delivered to the public endpoint, we do mark the relay contact for archival as well
 516                         if ($public_message) {
 517                                 Relay::markForArchival($contact);
 518                         }
 519
 520                         if (empty($contact['contact-type']) || ($contact['contact-type'] != Model\Contact::TYPE_RELAY)) {
 521                                 Logger::info('Delivery failed: defer message', ['id' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 522                                 // defer message for redelivery
 523                                 if (!Worker::defer() && in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 524                                         Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 525                                 }
 526                         } elseif (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 527                                 Model\Post\DeliveryData::incrementQueueFailed($target_item['uri-id']);
 528                         }
 529                 }
 530         }
 531
 532         /**
 533          * Deliver content via mail
 534          *
 535          * @param string $cmd         Command
 536          * @param array  $contact     Contact record of the receiver
 537          * @param array  $owner       Owner record of the sender
 538          * @param array  $target_item Item record of the content
 539          * @param array  $thr_parent  Item record of the direct parent in the thread
 540          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 541          * @throws \ImagickException
 542          */
 543         private static function deliverMail($cmd, $contact, $owner, $target_item, $thr_parent)
 544         {
 545                 if (DI::config()->get('system','dfrn_only')) {
 546                         return;
 547                 }
 548
 549                 $addr = $contact['addr'];
 550                 if (!strlen($addr)) {
 551                         return;
 552                 }
 553
 554                 if (!in_array($cmd, [self::POST, self::POKE])) {
 555                         return;
 556                 }
 557
 558                 if ($target_item['verb'] != Activity::POST) {
 559                         return;
 560                 }
 561
 562                 if (!empty($thr_parent['object'])) {
 563                         $data = json_decode($thr_parent['object'], true);
 564                         if (!empty($data['reply_to'])) {
 565                                 $addr = $data['reply_to'][0]['mailbox'] . '@' . $data['reply_to'][0]['host'];
 566                                 Logger::info('Use "reply-to" address of the thread parent', ['addr' => $addr]);
 567                         } elseif (!empty($data['from'])) {
 568                                 $addr = $data['from'][0]['mailbox'] . '@' . $data['from'][0]['host'];
 569                                 Logger::info('Use "from" address of the thread parent', ['addr' => $addr]);
 570                         }
 571                 }
 572
 573                 $local_user = DBA::selectFirst('user', [], ['uid' => $owner['uid']]);
 574                 if (!DBA::isResult($local_user)) {
 575                         return;
 576                 }
 577
 578                 Logger::info('About to deliver via mail', ['guid' => $target_item['guid'], 'to' => $addr]);
 579
 580                 $reply_to = '';
 581                 $mailacct = DBA::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
 582                 if (DBA::isResult($mailacct) && !empty($mailacct['reply_to'])) {
 583                         $reply_to = $mailacct['reply_to'];
 584                 }
 585
 586                 $subject  = ($target_item['title'] ? Email::encodeHeader($target_item['title'], 'UTF-8') : DI::l10n()->t("\x28no subject\x29"));
 587
 588                 // only expose our real email address to true friends
 589
 590                 if (($contact['rel'] == Model\Contact::FRIEND) && !$contact['blocked']) {
 591                         if ($reply_to) {
 592                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to . '>' . "\n";
 593                                 $headers .= 'Sender: ' . $local_user['email'] . "\n";
 594                         } else {
 595                                 $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $local_user['email'] . '>' . "\n";
 596                         }
 597                 } else {
 598                         $sender = DI::config()->get('config', 'sender_email', 'noreply@' . DI::baseUrl()->getHostname());
 599                         $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <' . $sender . '>' . "\n";
 600                 }
 601
 602                 $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
 603
 604                 if ($target_item['uri'] !== $target_item['parent-uri']) {
 605                         $headers .= 'References: <' . Email::iri2msgid($target_item['parent-uri']) . '>';
 606
 607                         // Export more references on deeper nested threads
 608                         if (($target_item['thr-parent'] != '') && ($target_item['thr-parent'] != $target_item['parent-uri'])) {
 609                                 $headers .= ' <' . Email::iri2msgid($target_item['thr-parent']) . '>';
 610                         }
 611
 612                         $headers .= "\n";
 613
 614                         if (empty($target_item['title'])) {
 615                                 $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 616                                 $title = Model\Post::selectFirst(['title'], $condition);
 617
 618                                 if (DBA::isResult($title) && ($title['title'] != '')) {
 619                                         $subject = $title['title'];
 620                                 } else {
 621                                         $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
 622                                         $title = Model\Post::selectFirst(['title'], $condition);
 623
 624                                         if (DBA::isResult($title) && ($title['title'] != '')) {
 625                                                 $subject = $title['title'];
 626                                         }
 627                                 }
 628                         }
 629
 630                         if (strncasecmp($subject, 'RE:', 3)) {
 631                                 $subject = 'Re: ' . $subject;
 632                         }
 633                 }
 634
 635                 Email::send($addr, $subject, $headers, $target_item);
 636
 637                 Model\Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Model\Post\DeliveryData::MAIL);
 638
 639                 Logger::info('Delivered via mail', ['guid' => $target_item['guid'], 'to' => $addr, 'subject' => $subject]);
 640         }
 641 }