src/Worker/Notifier.php

   1 <?php
   2 /**
   3  * @file src/Worker/Notifier.php
   4  */
   5 namespace Friendica\Worker;
   6
   7 use Friendica\BaseObject;
   8 use Friendica\Core\Addon;
   9 use Friendica\Core\Config;
  10 use Friendica\Core\Hook;
  11 use Friendica\Core\Logger;
  12 use Friendica\Core\Protocol;
  13 use Friendica\Core\Worker;
  14 use Friendica\Database\DBA;
  15 use Friendica\Model\Contact;
  16 use Friendica\Model\Conversation;
  17 use Friendica\Model\Group;
  18 use Friendica\Model\Item;
  19 use Friendica\Model\PushSubscriber;
  20 use Friendica\Model\User;
  21 use Friendica\Network\Probe;
  22 use Friendica\Protocol\ActivityPub;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Protocol\Salmon;
  26
  27 /*
  28  * The notifier is typically called with:
  29  *
  30  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  31  *
  32  * where COMMAND is one of the following:
  33  *
  34  *              activity                                (in diaspora.php, dfrn_confirm.php, profiles.php)
  35  *              comment-import                  (in diaspora.php, items.php)
  36  *              comment-new                             (in item.php)
  37  *              drop                                    (in diaspora.php, items.php, photos.php)
  38  *              edit_post                               (in item.php)
  39  *              event                                   (in events.php)
  40  *              like                                    (in like.php, poke.php)
  41  *              mail                                    (in message.php)
  42  *              suggest                                 (in fsuggest.php)
  43  *              tag                                             (in photos.php, poke.php, tagger.php)
  44  *              tgroup                                  (in items.php)
  45  *              wall-new                                (in photos.php, item.php)
  46  *              removeme                                (in Contact.php)
  47  *              relocate                                (in uimport.php)
  48  *
  49  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  50  */
  51
  52 class Notifier
  53 {
  54         public static function execute($cmd, $item_id)
  55         {
  56                 $a = BaseObject::getApp();
  57
  58                 Logger::log('Invoked: ' . $cmd . ': ' . $item_id, Logger::DEBUG);
  59
  60                 $top_level = false;
  61                 $recipients = [];
  62                 $url_recipients = [];
  63
  64                 $normal_mode = true;
  65                 $recipients_relocate = [];
  66
  67                 if ($cmd == Delivery::MAIL) {
  68                         $normal_mode = false;
  69                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $item_id]);
  70                         if (!DBA::isResult($message)) {
  71                                 return;
  72                         }
  73                         $uid = $message['uid'];
  74                         $recipients[] = $message['contact-id'];
  75                 } elseif ($cmd == Delivery::SUGGESTION) {
  76                         $normal_mode = false;
  77                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $item_id]);
  78                         if (!DBA::isResult($suggest)) {
  79                                 return;
  80                         }
  81                         $uid = $suggest['uid'];
  82                         $recipients[] = $suggest['cid'];
  83                 } elseif ($cmd == Delivery::REMOVAL) {
  84                         $r = q("SELECT `contact`.*, `user`.`prvkey` AS `uprvkey`,
  85                                         `user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
  86                                         `user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`, `user`.`guid`
  87                                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
  88                                         WHERE `contact`.`uid` = %d AND `contact`.`self` LIMIT 1",
  89                                         intval($item_id));
  90                         if (!$r) {
  91                                 return;
  92                         }
  93                         $user = $r[0];
  94
  95                         $r = q("SELECT * FROM `contact` WHERE NOT `self` AND `uid` = %d", intval($item_id));
  96                         if (!$r) {
  97                                 return;
  98                         }
  99                         foreach ($r as $contact) {
 100                                 Contact::terminateFriendship($user, $contact, true);
 101                         }
 102
 103                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 104                         foreach ($inboxes as $inbox) {
 105                                 Logger::log('Account removal for user ' . $item_id . ' to ' . $inbox .' via ActivityPub', Logger::DEBUG);
 106                                 Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $a->queue['created'], 'dont_fork' => true],
 107                                         'APDelivery', Delivery::REMOVAL, '', $inbox, $item_id);
 108                         }
 109
 110                         return;
 111                 } elseif ($cmd == Delivery::RELOCATION) {
 112                         $normal_mode = false;
 113                         $uid = $item_id;
 114
 115                         $recipients_relocate = q("SELECT * FROM `contact` WHERE `uid` = %d AND NOT `self` AND `network` IN ('%s', '%s')",
 116                                                 intval($uid), Protocol::DFRN, Protocol::DIASPORA);
 117                 } else {
 118                         // find ancestors
 119                         $condition = ['id' => $item_id, 'visible' => true, 'moderated' => false];
 120                         $target_item = Item::selectFirst([], $condition);
 121
 122                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 123                                 return;
 124                         }
 125
 126                         $parent_id = intval($target_item['parent']);
 127                         $uid = $target_item['contact-uid'];
 128                         $updated = $target_item['edited'];
 129
 130                         $condition = ['parent' => $parent_id, 'visible' => true, 'moderated' => false];
 131                         $params = ['order' => ['id']];
 132                         $ret = Item::select([], $condition, $params);
 133
 134                         if (!DBA::isResult($ret)) {
 135                                 return;
 136                         }
 137
 138                         $items = Item::inArray($ret);
 139
 140                         // avoid race condition with deleting entries
 141                         if ($items[0]['deleted']) {
 142                                 foreach ($items as $item) {
 143                                         $item['deleted'] = 1;
 144                                 }
 145                         }
 146
 147                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 148                                 Logger::log('Top level post');
 149                                 $top_level = true;
 150                         }
 151                 }
 152
 153                 $owner = User::getOwnerDataById($uid);
 154                 if (!$owner) {
 155                         return;
 156                 }
 157
 158                 $walltowall = ($top_level && ($owner['id'] != $items[0]['contact-id']) ? true : false);
 159
 160                 // Should the post be transmitted to Diaspora?
 161                 $diaspora_delivery = true;
 162
 163                 // If this is a public conversation, notify the feed hub
 164                 $public_message = true;
 165
 166                 // Do a PuSH
 167                 $push_notify = false;
 168
 169                 // Deliver directly to a forum, don't PuSH
 170                 $direct_forum_delivery = false;
 171
 172                 $followup = false;
 173                 $recipients_followup = [];
 174
 175                 if (!in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION, Delivery::RELOCATION])) {
 176                         $parent = $items[0];
 177
 178                         self::activityPubDelivery($a, $cmd, $item_id, $uid, $target_item, $parent);
 179
 180                         $fields = ['network', 'author-id', 'owner-id'];
 181                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 182                         $thr_parent = Item::selectFirst($fields, $condition);
 183
 184                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 185
 186                         // This is IMPORTANT!!!!
 187
 188                         // We will only send a "notify owner to relay" or followup message if the referenced post
 189                         // originated on our system by virtue of having our hostname somewhere
 190                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 191
 192                         // if $parent['wall'] == 1 we will already have the parent message in our array
 193                         // and we will relay the whole lot.
 194
 195                         $localhost = str_replace('www.','',$a->getHostName());
 196                         if (strpos($localhost,':')) {
 197                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 198                         }
 199                         /**
 200                          *
 201                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 202                          * have been known to cause runaway conditions which affected several servers, along with
 203                          * permissions issues.
 204                          *
 205                          */
 206
 207                         $relay_to_owner = false;
 208
 209                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 210                                 $relay_to_owner = true;
 211                         }
 212
 213
 214                         if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
 215                                 $relay_to_owner = true;
 216                         }
 217
 218                         // until the 'origin' flag has been in use for several months
 219                         // we will just use it as a fallback test
 220                         // later we will be able to use it as the primary test of whether or not to relay.
 221
 222                         if (!$target_item['origin']) {
 223                                 $relay_to_owner = false;
 224                         }
 225                         if ($parent['origin']) {
 226                                 $relay_to_owner = false;
 227                         }
 228
 229                         // Special treatment for forum posts
 230                         if (self::isForumPost($target_item, $owner)) {
 231                                 $relay_to_owner = true;
 232                                 $direct_forum_delivery = true;
 233                         }
 234
 235                         // Avoid that comments in a forum thread are sent to OStatus
 236                         if (self::isForumPost($parent, $owner)) {
 237                                 $direct_forum_delivery = true;
 238                         }
 239
 240                         if ($relay_to_owner) {
 241                                 // local followup to remote post
 242                                 $followup = true;
 243                                 $public_message = false; // not public
 244                                 $recipients = [$parent['contact-id']];
 245                                 $recipients_followup  = [$parent['contact-id']];
 246
 247                                 Logger::log('Followup ' . $target_item['guid'] . ' to ' . $parent['contact-id'], Logger::DEBUG);
 248
 249                                 //if (!$target_item['private'] && $target_item['wall'] &&
 250                                 if (!$target_item['private'] &&
 251                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 252                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 253                                         $push_notify = true;
 254
 255                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 256                                         $push_notify = true;
 257
 258                                         if ($parent["network"] == Protocol::OSTATUS) {
 259                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 260                                                 // Currently it is work at progress
 261                                                 $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s' AND NOT `blocked` AND NOT `pending` AND NOT `archive`",
 262                                                         intval($uid),
 263                                                         DBA::escape(Protocol::DFRN)
 264                                                 );
 265                                                 if (DBA::isResult($r)) {
 266                                                         foreach ($r as $rr) {
 267                                                                 $recipients_followup[] = $rr['id'];
 268                                                         }
 269                                                 }
 270                                         }
 271                                 }
 272
 273                                 if ($direct_forum_delivery) {
 274                                         $push_notify = false;
 275                                 }
 276
 277                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 278                         } else {
 279                                 $followup = false;
 280
 281                                 Logger::log('Distributing directly ' . $target_item["guid"], Logger::DEBUG);
 282
 283                                 // don't send deletions onward for other people's stuff
 284
 285                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 286                                         Logger::log('Ignoring delete notification for non-wall item');
 287                                         return;
 288                                 }
 289
 290                                 if (strlen($parent['allow_cid'])
 291                                         || strlen($parent['allow_gid'])
 292                                         || strlen($parent['deny_cid'])
 293                                         || strlen($parent['deny_gid'])) {
 294                                         $public_message = false; // private recipients, not public
 295                                 }
 296
 297                                 $allow_people = expand_acl($parent['allow_cid']);
 298                                 $allow_groups = Group::expand(expand_acl($parent['allow_gid']),true);
 299                                 $deny_people  = expand_acl($parent['deny_cid']);
 300                                 $deny_groups  = Group::expand(expand_acl($parent['deny_gid']));
 301
 302                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 303                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 304
 305                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== 'uplink')) {
 306                                         Worker::add($a->queue['priority'], 'Notifier', 'uplink', $item_id);
 307                                 }
 308
 309                                 foreach ($items as $item) {
 310                                         $recipients[] = $item['contact-id'];
 311                                         // pull out additional tagged people to notify (if public message)
 312                                         if ($public_message && strlen($item['inform'])) {
 313                                                 $people = explode(',',$item['inform']);
 314                                                 foreach ($people as $person) {
 315                                                         if (substr($person,0,4) === 'cid:') {
 316                                                                 $recipients[] = intval(substr($person,4));
 317                                                         } else {
 318                                                                 $url_recipients[] = substr($person,4);
 319                                                         }
 320                                                 }
 321                                         }
 322                                 }
 323
 324                                 if (count($url_recipients)) {
 325                                         Logger::log('Deliver ' . $target_item["guid"] . ' to _recipients ' . json_decode($url_recipients));
 326                                 }
 327
 328                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 329                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 330                                 $recipients = array_diff($recipients, $deny);
 331                         }
 332
 333                         // If the thread parent is OStatus then do some magic to distribute the messages.
 334                         // We have not only to look at the parent, since it could be a Friendica thread.
 335                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 336                                 $diaspora_delivery = false;
 337
 338                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 339
 340                                 // Send a salmon to the parent author
 341                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 342                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 343                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 344                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 345                                 }
 346
 347                                 // Send a salmon to the parent owner
 348                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 349                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 350                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 351                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 352                                 }
 353
 354                                 // Send a salmon notification to every person we mentioned in the post
 355                                 $arr = explode(',',$target_item['tag']);
 356                                 foreach ($arr as $x) {
 357                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 358                                         $matches = null;
 359                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 360                                                         $probed_contact = Probe::uri($matches[1]);
 361                                                 if ($probed_contact["notify"] != "") {
 362                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 363                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 364                                                 }
 365                                         }
 366                                 }
 367
 368                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 369                                 $networks = [Protocol::OSTATUS, Protocol::DFRN];
 370                         } else {
 371                                 $networks = [Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 372                         }
 373                 } else {
 374                         $public_message = false;
 375                 }
 376
 377                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 378                 if (!empty($target_item) && function_exists('imap_open') && !Config::get('system','imap_disabled')) {
 379                         if (!strlen($target_item['allow_cid']) && !strlen($target_item['allow_gid'])
 380                                 && !strlen($target_item['deny_cid']) && !strlen($target_item['deny_gid'])
 381                                 && intval($target_item['pubmail'])) {
 382                                 $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s'",
 383                                         intval($uid),
 384                                         DBA::escape(Protocol::MAIL)
 385                                 );
 386                                 if (DBA::isResult($r)) {
 387                                         foreach ($r as $rr) {
 388                                                 $recipients[] = $rr['id'];
 389                                         }
 390                                 }
 391                         }
 392                 }
 393
 394                 if (($cmd == Delivery::RELOCATION)) {
 395                         $contacts = $recipients_relocate;
 396                 } else {
 397                         if ($followup) {
 398                                 $recipients = $recipients_followup;
 399                         }
 400                         $condition = ['id' => $recipients, 'self' => false,
 401                                 'blocked' => false, 'pending' => false, 'archive' => false];
 402                         if (!empty($networks)) {
 403                                 $condition['network'] = $networks;
 404                         }
 405                         $result = DBA::select('contact', ['id', 'url', 'network', 'batch'], $condition);
 406                         $contacts = DBA::toArray($result);
 407                 }
 408
 409                 $conversants = [];
 410                 $batch_delivery = false;
 411
 412                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 413                         $r1 = [];
 414
 415                         if ($diaspora_delivery) {
 416                                 $batch_delivery = true;
 417
 418                                 $r1 = q("SELECT `batch`, ANY_VALUE(`id`) AS `id`, ANY_VALUE(`name`) AS `name`, ANY_VALUE(`network`) AS `network`
 419                                         FROM `contact` WHERE `network` = '%s' AND `batch` != ''
 420                                         AND `uid` = %d AND `rel` != %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` GROUP BY `batch`",
 421                                         DBA::escape(Protocol::DIASPORA),
 422                                         intval($owner['uid']),
 423                                         intval(Contact::SHARING)
 424                                 );
 425
 426                                 // Fetch the participation list
 427                                 // The function will ensure that there are no duplicates
 428                                 $r1 = Diaspora::participantsForThread($item_id, $r1);
 429
 430                                 // Add the relay to the list, avoid duplicates
 431                                 if (!$followup) {
 432                                         $r1 = Diaspora::relayList($item_id, $r1);
 433                                 }
 434                         }
 435
 436                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 437                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 438
 439                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'name', 'network'], $condition));
 440
 441                         $r = array_merge($r2, $r1);
 442
 443                         if (DBA::isResult($r)) {
 444                                 foreach ($r as $rr) {
 445                                         $conversants[] = $rr['id'];
 446                                         Logger::log('Public delivery of item ' . $target_item["guid"] . ' (' . $item_id . ') to ' . json_encode($rr), Logger::DEBUG);
 447                                         Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
 448                                                 'Delivery', $cmd, $item_id, (int)$rr['id']);
 449                                 }
 450                         }
 451
 452                         $push_notify = true;
 453                 }
 454
 455                 // delivery loop
 456                 if (DBA::isResult($contacts)) {
 457                         foreach ($contacts as $contact) {
 458                                 // Don't deliver to Diaspora if it already had been done as batch delivery
 459                                 if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 460                                         Logger::log('Already delivered  id ' . $item_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 461                                         continue;
 462                                 }
 463
 464                                 // Don't deliver to folks who have already been delivered to
 465                                 if (in_array($contact['id'], $conversants)) {
 466                                         Logger::log('Already delivered id ' . $item_id. ' to ' . json_encode($contact), Logger::DEBUG);
 467                                         continue;
 468                                 }
 469
 470                                 Logger::log('Delivery of item ' . $item_id . ' to ' . json_encode($contact), Logger::DEBUG);
 471                                 Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
 472                                                 'Delivery', $cmd, $item_id, (int)$contact['id']);
 473                         }
 474                 }
 475
 476                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 477                 // They are especially used for notifications to OStatus users that don't follow us.
 478                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
 479                         $slap = OStatus::salmon($target_item, $owner);
 480                         foreach ($url_recipients as $url) {
 481                                 if ($url) {
 482                                         Logger::log('Salmon delivery of item ' . $item_id . ' to ' . $url);
 483                                         $deliver_status = Salmon::slapper($owner, $url, $slap);
 484                                         /// @TODO Redeliver/queue these items on failure, though there is no contact record
 485                                 }
 486                         }
 487                 }
 488
 489                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 490                 if ($push_notify) {
 491                         Logger::log('Activating internal PuSH for item '.$item_id, Logger::DEBUG);
 492
 493                         // Handling the pubsubhubbub requests
 494                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 495                 }
 496
 497                 Logger::log('Calling hooks for ' . $cmd . ' ' . $item_id, Logger::DEBUG);
 498
 499                 if ($normal_mode) {
 500                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 501                 }
 502
 503                 Addon::callHooks('notifier_end',$target_item);
 504
 505                 return;
 506         }
 507
 508         private static function activityPubDelivery($a, $cmd, $item_id, $uid, $target_item, $parent)
 509         {
 510                 $inboxes = [];
 511                 $personal = false;
 512
 513                 if ($target_item['origin']) {
 514                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 515                         Logger::log('Origin item ' . $item_id . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 516                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 517                         Logger::log('Remote item ' . $item_id . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 518                         return;
 519                 } else {
 520                         // Remote items are transmitted via the personal inboxes.
 521                         // Doing so ensures that the dedicated receiver will get the message.
 522                         $personal = true;
 523                         Logger::log('Remote item ' . $item_id . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 524                 }
 525
 526                 if ($parent['origin']) {
 527                         $parent_inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, $personal);
 528                         $inboxes = array_merge($inboxes, $parent_inboxes);
 529                 }
 530
 531                 if (empty($inboxes)) {
 532                         Logger::log('No inboxes found for item ' . $item_id . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 533                         return;
 534                 }
 535
 536                 // Fill the item cache
 537                 ActivityPub\Transmitter::createCachedActivityFromItem($item_id, true);
 538
 539                 foreach ($inboxes as $inbox) {
 540                         Logger::log('Deliver ' . $item_id .' to ' . $inbox .' via ActivityPub', Logger::DEBUG);
 541
 542                         Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
 543                                         'APDelivery', $cmd, $item_id, $inbox, $uid);
 544                 }
 545         }
 546
 547         private static function isForumPost($item, $owner) {
 548                 if (($item['author-id'] == $item['owner-id']) ||
 549                         ($owner['id'] == $item['contact-id']) ||
 550                         ($item['uri'] != $item['parent-uri'])) {
 551                         return false;
 552                 }
 553
 554                 $fields = ['forum', 'prv'];
 555                 $condition = ['id' => $item['contact-id']];
 556                 $contact = DBA::selectFirst('contact', $fields, $condition);
 557                 if (!DBA::isResult($contact)) {
 558                         // Should never happen
 559                         return false;
 560                 }
 561
 562                 // Is the post from a forum?
 563                 return ($contact['forum'] || $contact['prv']);
 564         }
 565 }