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\Config;
   9 use Friendica\Core\Hook;
  10 use Friendica\Core\Logger;
  11 use Friendica\Core\Protocol;
  12 use Friendica\Core\Worker;
  13 use Friendica\Database\DBA;
  14 use Friendica\Model\Contact;
  15 use Friendica\Model\Conversation;
  16 use Friendica\Model\Group;
  17 use Friendica\Model\Item;
  18 use Friendica\Model\ItemDeliveryData;
  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 require_once 'include/items.php';
  28
  29 /*
  30  * The notifier is typically called with:
  31  *
  32  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  33  *
  34  * where COMMAND is one of the following:
  35  *
  36  *              activity                                (in diaspora.php, dfrn_confirm.php, profiles.php)
  37  *              comment-import                  (in diaspora.php, items.php)
  38  *              comment-new                             (in item.php)
  39  *              drop                                    (in diaspora.php, items.php, photos.php)
  40  *              edit_post                               (in item.php)
  41  *              event                                   (in events.php)
  42  *              like                                    (in like.php, poke.php)
  43  *              mail                                    (in message.php)
  44  *              suggest                                 (in fsuggest.php)
  45  *              tag                                             (in photos.php, poke.php, tagger.php)
  46  *              tgroup                                  (in items.php)
  47  *              wall-new                                (in photos.php, item.php)
  48  *              removeme                                (in Contact.php)
  49  *              relocate                                (in uimport.php)
  50  *
  51  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  52  */
  53
  54 class Notifier
  55 {
  56         public static function execute($cmd, $target_id)
  57         {
  58                 $a = BaseObject::getApp();
  59
  60                 Logger::log('Invoked: ' . $cmd . ': ' . $target_id, Logger::DEBUG);
  61
  62                 $top_level = false;
  63                 $recipients = [];
  64                 $url_recipients = [];
  65
  66                 $delivery_contacts_stmt = null;
  67                 $target_item = [];
  68                 $items = [];
  69                 $delivery_queue_count = 0;
  70
  71                 if ($cmd == Delivery::MAIL) {
  72                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  73                         if (!DBA::isResult($message)) {
  74                                 return;
  75                         }
  76                         $uid = $message['uid'];
  77                         $recipients[] = $message['contact-id'];
  78                 } elseif ($cmd == Delivery::SUGGESTION) {
  79                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $target_id]);
  80                         if (!DBA::isResult($suggest)) {
  81                                 return;
  82                         }
  83                         $uid = $suggest['uid'];
  84                         $recipients[] = $suggest['cid'];
  85                 } elseif ($cmd == Delivery::REMOVAL) {
  86                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  87                 } elseif ($cmd == Delivery::RELOCATION) {
  88                         $uid = $target_id;
  89
  90                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
  91                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'network', 'batch'], $condition);
  92                 } else {
  93                         // find ancestors
  94                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
  95                         $target_item = Item::selectFirst([], $condition);
  96
  97                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
  98                                 return;
  99                         }
 100
 101                         if (!empty($target_item['contact-uid'])) {
 102                                 $uid = $target_item['contact-uid'];
 103                         } elseif (!empty($target_item['uid'])) {
 104                                 $uid = $target_item['uid'];
 105                         } else {
 106                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 107                                 return;
 108                         }
 109
 110                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 111                         $params = ['order' => ['id']];
 112                         $items_stmt = Item::select([], $condition, $params);
 113                         if (!DBA::isResult($items_stmt)) {
 114                                 return;
 115                         }
 116
 117                         $items = Item::inArray($items_stmt);
 118
 119                         // avoid race condition with deleting entries
 120                         if ($items[0]['deleted']) {
 121                                 foreach ($items as $item) {
 122                                         $item['deleted'] = 1;
 123                                 }
 124                         }
 125
 126                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 127                                 Logger::log('Top level post');
 128                                 $top_level = true;
 129                         }
 130                 }
 131
 132                 $owner = User::getOwnerDataById($uid);
 133                 if (!$owner) {
 134                         return;
 135                 }
 136
 137                 // Should the post be transmitted to Diaspora?
 138                 $diaspora_delivery = true;
 139
 140                 // If this is a public conversation, notify the feed hub
 141                 $public_message = true;
 142
 143                 // Do a PuSH
 144                 $push_notify = false;
 145
 146                 // Deliver directly to a forum, don't PuSH
 147                 $direct_forum_delivery = false;
 148
 149                 $followup = false;
 150                 $recipients_followup = [];
 151
 152                 if (!empty($target_item) && !empty($items)) {
 153                         $parent = $items[0];
 154
 155                         $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $a->queue['priority'], $a->query_string['created']);
 156
 157                         $fields = ['network', 'author-id', 'owner-id'];
 158                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 159                         $thr_parent = Item::selectFirst($fields, $condition);
 160
 161                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 162
 163                         // This is IMPORTANT!!!!
 164
 165                         // We will only send a "notify owner to relay" or followup message if the referenced post
 166                         // originated on our system by virtue of having our hostname somewhere
 167                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 168
 169                         // if $parent['wall'] == 1 we will already have the parent message in our array
 170                         // and we will relay the whole lot.
 171
 172                         $localhost = str_replace('www.','',$a->getHostName());
 173                         if (strpos($localhost,':')) {
 174                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 175                         }
 176                         /**
 177                          *
 178                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 179                          * have been known to cause runaway conditions which affected several servers, along with
 180                          * permissions issues.
 181                          *
 182                          */
 183
 184                         $relay_to_owner = false;
 185
 186                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 187                                 $relay_to_owner = true;
 188                         }
 189
 190
 191                         if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
 192                                 $relay_to_owner = true;
 193                         }
 194
 195                         // until the 'origin' flag has been in use for several months
 196                         // we will just use it as a fallback test
 197                         // later we will be able to use it as the primary test of whether or not to relay.
 198
 199                         if (!$target_item['origin']) {
 200                                 $relay_to_owner = false;
 201                         }
 202                         if ($parent['origin']) {
 203                                 $relay_to_owner = false;
 204                         }
 205
 206                         // Special treatment for forum posts
 207                         if (self::isForumPost($target_item, $owner)) {
 208                                 $relay_to_owner = true;
 209                                 $direct_forum_delivery = true;
 210                         }
 211
 212                         // Avoid that comments in a forum thread are sent to OStatus
 213                         if (self::isForumPost($parent, $owner)) {
 214                                 $direct_forum_delivery = true;
 215                         }
 216
 217                         if ($relay_to_owner) {
 218                                 // local followup to remote post
 219                                 $followup = true;
 220                                 $public_message = false; // not public
 221                                 $recipients = [$parent['contact-id']];
 222                                 $recipients_followup  = [$parent['contact-id']];
 223
 224                                 Logger::log('Followup ' . $target_item['guid'] . ' to ' . $parent['contact-id'], Logger::DEBUG);
 225
 226                                 //if (!$target_item['private'] && $target_item['wall'] &&
 227                                 if (!$target_item['private'] &&
 228                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 229                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 230                                         $push_notify = true;
 231
 232                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 233                                         $push_notify = true;
 234
 235                                         if ($parent["network"] == Protocol::OSTATUS) {
 236                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 237                                                 // Currently it is work at progress
 238                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 239                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 240                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 241                                                         $recipients_followup[] = $followup_contact['id'];
 242                                                 }
 243                                                 DBA::close($followup_contacts_stmt);
 244                                         }
 245                                 }
 246
 247                                 if ($direct_forum_delivery) {
 248                                         $push_notify = false;
 249                                 }
 250
 251                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 252                         } else {
 253                                 $followup = false;
 254
 255                                 Logger::log('Distributing directly ' . $target_item["guid"], Logger::DEBUG);
 256
 257                                 // don't send deletions onward for other people's stuff
 258
 259                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 260                                         Logger::log('Ignoring delete notification for non-wall item');
 261                                         return;
 262                                 }
 263
 264                                 if (strlen($parent['allow_cid'])
 265                                         || strlen($parent['allow_gid'])
 266                                         || strlen($parent['deny_cid'])
 267                                         || strlen($parent['deny_gid'])) {
 268                                         $public_message = false; // private recipients, not public
 269                                 }
 270
 271                                 $allow_people = expand_acl($parent['allow_cid']);
 272                                 $allow_groups = Group::expand(expand_acl($parent['allow_gid']),true);
 273                                 $deny_people  = expand_acl($parent['deny_cid']);
 274                                 $deny_groups  = Group::expand(expand_acl($parent['deny_gid']));
 275
 276                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 277                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 278
 279                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== 'uplink')) {
 280                                         Worker::add($a->queue['priority'], 'Notifier', 'uplink', $target_id);
 281                                 }
 282
 283                                 foreach ($items as $item) {
 284                                         $recipients[] = $item['contact-id'];
 285                                         // pull out additional tagged people to notify (if public message)
 286                                         if ($public_message && strlen($item['inform'])) {
 287                                                 $people = explode(',',$item['inform']);
 288                                                 foreach ($people as $person) {
 289                                                         if (substr($person,0,4) === 'cid:') {
 290                                                                 $recipients[] = intval(substr($person,4));
 291                                                         } else {
 292                                                                 $url_recipients[] = substr($person,4);
 293                                                         }
 294                                                 }
 295                                         }
 296                                 }
 297
 298                                 if (count($url_recipients)) {
 299                                         Logger::log('Deliver ' . $target_item["guid"] . ' to _recipients ' . json_encode($url_recipients));
 300                                 }
 301
 302                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 303                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 304                                 $recipients = array_diff($recipients, $deny);
 305
 306                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 307                                 if (
 308                                         function_exists('imap_open')
 309                                         && !Config::get('system','imap_disabled')
 310                                         && $public_message
 311                                         && intval($target_item['pubmail'])
 312                                 ) {
 313                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 314                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 315                                                 $recipients[] = $mail_contact['id'];
 316                                         }
 317                                         DBA::close($mail_contacts_stmt);
 318                                 }
 319                         }
 320
 321                         // If the thread parent is OStatus then do some magic to distribute the messages.
 322                         // We have not only to look at the parent, since it could be a Friendica thread.
 323                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 324                                 $diaspora_delivery = false;
 325
 326                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 327
 328                                 // Send a salmon to the parent author
 329                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 330                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 331                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 332                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 333                                 }
 334
 335                                 // Send a salmon to the parent owner
 336                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 337                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 338                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 339                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 340                                 }
 341
 342                                 // Send a salmon notification to every person we mentioned in the post
 343                                 $arr = explode(',',$target_item['tag']);
 344                                 foreach ($arr as $x) {
 345                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 346                                         $matches = null;
 347                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 348                                                         $probed_contact = Probe::uri($matches[1]);
 349                                                 if ($probed_contact["notify"] != "") {
 350                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 351                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 352                                                 }
 353                                         }
 354                                 }
 355
 356                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 357                                 $networks = [Protocol::OSTATUS, Protocol::DFRN];
 358                         } else {
 359                                 $networks = [Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 360                         }
 361                 } else {
 362                         $public_message = false;
 363                 }
 364
 365                 if (empty($delivery_contacts_stmt)) {
 366                         if ($followup) {
 367                                 $recipients = $recipients_followup;
 368                         }
 369                         $condition = ['id' => $recipients, 'self' => false,
 370                                 'blocked' => false, 'pending' => false, 'archive' => false];
 371                         if (!empty($networks)) {
 372                                 $condition['network'] = $networks;
 373                         }
 374                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'network', 'batch'], $condition);
 375                 }
 376
 377                 $conversants = [];
 378                 $batch_delivery = false;
 379
 380                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 381                         $relay_list = [];
 382
 383                         if ($diaspora_delivery) {
 384                                 $batch_delivery = true;
 385
 386                                 $relay_list_stmt = DBA::p(
 387                                         "SELECT
 388                                         `batch`,
 389                                         ANY_VALUE(`id`) AS `id`,
 390                                         ANY_VALUE(`name`) AS `name`,
 391                                         ANY_VALUE(`network`) AS `network`
 392                                         FROM `contact`
 393                                         WHERE `network` = ?
 394                                         AND `batch` != ''
 395                                         AND `uid` = ?
 396                                         AND `rel` != ?
 397                                         AND NOT `blocked`
 398                                         AND NOT `pending`
 399                                         AND NOT `archive`
 400                                         GROUP BY `batch`",
 401                                         Protocol::DIASPORA,
 402                                         $owner['uid'],
 403                                         Contact::SHARING
 404                                 );
 405                                 $relay_list = DBA::toArray($relay_list_stmt);
 406
 407                                 // Fetch the participation list
 408                                 // The function will ensure that there are no duplicates
 409                                 $relay_list = Diaspora::participantsForThread($target_id, $relay_list);
 410
 411                                 // Add the relay to the list, avoid duplicates.
 412                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 413                                 if (!$followup && !self::isForumPost($target_item, $owner)) {
 414                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 415                                 }
 416                         }
 417
 418                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 419                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 420
 421                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'name', 'network'], $condition));
 422
 423                         $r = array_merge($r2, $relay_list);
 424
 425                         if (DBA::isResult($r)) {
 426                                 foreach ($r as $rr) {
 427                                         $conversants[] = $rr['id'];
 428
 429                                         $delivery_queue_count++;
 430
 431                                         Logger::log('Public delivery of item ' . $target_item["guid"] . ' (' . $target_id . ') to ' . json_encode($rr), Logger::DEBUG);
 432
 433                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 434                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 435                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 436                                         if ($rr['network'] == Protocol::DIASPORA) {
 437                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 438                                         } else {
 439                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 440                                         }
 441                                         Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id']);
 442                                 }
 443                         }
 444
 445                         $push_notify = true;
 446                 }
 447
 448                 // delivery loop
 449                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 450                         // Don't deliver to Diaspora if it already had been done as batch delivery
 451                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 452                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 453                                 continue;
 454                         }
 455
 456                         // Don't deliver to folks who have already been delivered to
 457                         if (in_array($contact['id'], $conversants)) {
 458                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 459                                 continue;
 460                         }
 461
 462                         $delivery_queue_count++;
 463
 464                         Logger::log('Delivery of item ' . $target_id . ' to ' . json_encode($contact), Logger::DEBUG);
 465
 466                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 467                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 468                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 469                         if ($contact['network'] == Protocol::DIASPORA) {
 470                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 471                         } else {
 472                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 473                         }
 474                         Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id']);
 475                 }
 476                 DBA::close($delivery_contacts_stmt);
 477
 478
 479                 $url_recipients = array_filter($url_recipients);
 480                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 481                 // They are especially used for notifications to OStatus users that don't follow us.
 482                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 483                         $delivery_queue_count += count($url_recipients);
 484                         $slap = OStatus::salmon($target_item, $owner);
 485                         foreach ($url_recipients as $url) {
 486                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 487                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 488                                 Salmon::slapper($owner, $url, $slap);
 489                                 ItemDeliveryData::incrementQueueDone($target_id);
 490                         }
 491                 }
 492
 493                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 494                 if ($push_notify) {
 495                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 496
 497                         // Handling the pubsubhubbub requests
 498                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 499                 }
 500
 501                 if (!empty($target_item)) {
 502                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 503
 504                         if (in_array($cmd, [Delivery::POST, Delivery::COMMENT])) {
 505                                 ItemDeliveryData::update($target_item['id'], ['queue_count' => $delivery_queue_count]);
 506                         }
 507
 508                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 509
 510                         Hook::callAll('notifier_end', $target_item);
 511                 }
 512
 513                 return;
 514         }
 515
 516         /**
 517          * @param int    $self_user_id
 518          * @param int    $priority The priority the Notifier queue item was created with
 519          * @param string $created  The date the Notifier queue item was created on
 520          * @return bool
 521          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 522          * @throws \ImagickException
 523          */
 524         private static function notifySelfRemoval($self_user_id, $priority, $created)
 525         {
 526                 $owner = User::getOwnerDataById($self_user_id);
 527                 if (!$owner) {
 528                         return false;
 529                 }
 530
 531                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 532                 if (!DBA::isResult($contacts_stmt)) {
 533                         return false;
 534                 }
 535
 536                 while($contact = DBA::fetch($contacts_stmt)) {
 537                         Contact::terminateFriendship($owner, $contact, true);
 538                 }
 539                 DBA::close($contacts_stmt);
 540
 541                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 542                 foreach ($inboxes as $inbox) {
 543                         Logger::log('Account removal for user ' . $self_user_id . ' to ' . $inbox .' via ActivityPub', Logger::DEBUG);
 544                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 545                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 546                 }
 547
 548                 return true;
 549         }
 550
 551         /**
 552          * @param string $cmd
 553          * @param array  $target_item
 554          * @param array  $parent
 555          * @param int    $priority The priority the Notifier queue item was created with
 556          * @param string $created  The date the Notifier queue item was created on
 557          * @return int The number of delivery tasks created
 558          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 559          * @throws \ImagickException
 560          */
 561         private static function activityPubDelivery($cmd, array $target_item, array $parent, $priority, $created)
 562         {
 563                 $inboxes = [];
 564
 565                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 566
 567                 if ($target_item['origin']) {
 568                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 569                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 570                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 571                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 572                         return 0;
 573                 } elseif ($parent['origin']) {
 574                         // Remote items are transmitted via the personal inboxes.
 575                         // Doing so ensures that the dedicated receiver will get the message.
 576                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 577                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 578                 }
 579
 580                 if (empty($inboxes)) {
 581                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 582                         return 0;
 583                 }
 584
 585                 // Fill the item cache
 586                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 587
 588                 foreach ($inboxes as $inbox) {
 589                         Logger::log('Deliver ' . $target_item['id'] .' to ' . $inbox .' via ActivityPub', Logger::DEBUG);
 590
 591                         Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 592                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid);
 593                 }
 594
 595                 return count($inboxes);
 596         }
 597
 598         private static function isForumPost(array $item, array $owner)
 599         {
 600                 if (($item['author-id'] == $item['owner-id']) ||
 601                         ($owner['id'] == $item['contact-id']) ||
 602                         ($item['uri'] != $item['parent-uri'])) {
 603                         return false;
 604                 }
 605
 606                 $fields = ['forum', 'prv'];
 607                 $condition = ['id' => $item['contact-id']];
 608                 $contact = DBA::selectFirst('contact', $fields, $condition);
 609                 if (!DBA::isResult($contact)) {
 610                         // Should never happen
 611                         return false;
 612                 }
 613
 614                 // Is the post from a forum?
 615                 return ($contact['forum'] || $contact['prv']);
 616         }
 617 }