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