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\APContact;
  15 use Friendica\Model\Contact;
  16 use Friendica\Model\Conversation;
  17 use Friendica\Model\Group;
  18 use Friendica\Model\Item;
  19 use Friendica\Model\ItemDeliveryData;
  20 use Friendica\Model\PushSubscriber;
  21 use Friendica\Model\User;
  22 use Friendica\Network\Probe;
  23 use Friendica\Protocol\ActivityPub;
  24 use Friendica\Protocol\Diaspora;
  25 use Friendica\Protocol\OStatus;
  26 use Friendica\Protocol\Salmon;
  27
  28 require_once 'include/items.php';
  29
  30 /*
  31  * The notifier is typically called with:
  32  *
  33  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  34  *
  35  * where COMMAND is one of the following:
  36  *
  37  *              activity                                (in diaspora.php, dfrn_confirm.php, profiles.php)
  38  *              comment-import                  (in diaspora.php, items.php)
  39  *              comment-new                             (in item.php)
  40  *              drop                                    (in diaspora.php, items.php, photos.php)
  41  *              edit_post                               (in item.php)
  42  *              event                                   (in events.php)
  43  *              like                                    (in like.php, poke.php)
  44  *              mail                                    (in message.php)
  45  *              suggest                                 (in fsuggest.php)
  46  *              tag                                             (in photos.php, poke.php, tagger.php)
  47  *              tgroup                                  (in items.php)
  48  *              wall-new                                (in photos.php, item.php)
  49  *              removeme                                (in Contact.php)
  50  *              relocate                                (in uimport.php)
  51  *
  52  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  53  */
  54
  55 class Notifier
  56 {
  57         public static function execute($cmd, $target_id)
  58         {
  59                 $a = BaseObject::getApp();
  60
  61                 Logger::log('Invoked: ' . $cmd . ': ' . $target_id, Logger::DEBUG);
  62
  63                 $top_level = false;
  64                 $recipients = [];
  65                 $url_recipients = [];
  66
  67                 $delivery_contacts_stmt = null;
  68                 $target_item = [];
  69                 $items = [];
  70                 $delivery_queue_count = 0;
  71
  72                 if ($cmd == Delivery::MAIL) {
  73                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  74                         if (!DBA::isResult($message)) {
  75                                 return;
  76                         }
  77                         $uid = $message['uid'];
  78                         $recipients[] = $message['contact-id'];
  79
  80                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  81                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, §uid, true);
  82                         foreach ($inboxes as $inbox) {
  83                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_id, 'inbox' => $inbox]);
  84                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  85                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  86                         }
  87                 } elseif ($cmd == Delivery::SUGGESTION) {
  88                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $target_id]);
  89                         if (!DBA::isResult($suggest)) {
  90                                 return;
  91                         }
  92                         $uid = $suggest['uid'];
  93                         $recipients[] = $suggest['cid'];
  94                 } elseif ($cmd == Delivery::REMOVAL) {
  95                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  96                 } elseif ($cmd == Delivery::RELOCATION) {
  97                         $uid = $target_id;
  98
  99                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
 100                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'network', 'protocol', 'batch'], $condition);
 101                 } else {
 102                         // find ancestors
 103                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
 104                         $target_item = Item::selectFirst([], $condition);
 105
 106                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 107                                 return;
 108                         }
 109
 110                         if (!empty($target_item['contact-uid'])) {
 111                                 $uid = $target_item['contact-uid'];
 112                         } elseif (!empty($target_item['uid'])) {
 113                                 $uid = $target_item['uid'];
 114                         } else {
 115                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 116                                 return;
 117                         }
 118
 119                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 120                         $params = ['order' => ['id']];
 121                         $items_stmt = Item::select([], $condition, $params);
 122                         if (!DBA::isResult($items_stmt)) {
 123                                 return;
 124                         }
 125
 126                         $items = Item::inArray($items_stmt);
 127
 128                         // avoid race condition with deleting entries
 129                         if ($items[0]['deleted']) {
 130                                 foreach ($items as $item) {
 131                                         $item['deleted'] = 1;
 132                                 }
 133                         }
 134
 135                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 136                                 Logger::log('Top level post');
 137                                 $top_level = true;
 138                         }
 139                 }
 140
 141                 $owner = User::getOwnerDataById($uid);
 142                 if (!$owner) {
 143                         return;
 144                 }
 145
 146                 // Should the post be transmitted to Diaspora?
 147                 $diaspora_delivery = true;
 148
 149                 // If this is a public conversation, notify the feed hub
 150                 $public_message = true;
 151
 152                 // Do a PuSH
 153                 $push_notify = false;
 154
 155                 // Deliver directly to a forum, don't PuSH
 156                 $direct_forum_delivery = false;
 157
 158                 $followup = false;
 159                 $recipients_followup = [];
 160
 161                 if (!empty($target_item) && !empty($items)) {
 162                         $parent = $items[0];
 163
 164                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 165                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $a->queue['priority'], $a->queue['created'], $owner);
 166                         }
 167
 168                         $fields = ['network', 'author-id', 'owner-id'];
 169                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 170                         $thr_parent = Item::selectFirst($fields, $condition);
 171
 172                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 173
 174                         // This is IMPORTANT!!!!
 175
 176                         // We will only send a "notify owner to relay" or followup message if the referenced post
 177                         // originated on our system by virtue of having our hostname somewhere
 178                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 179
 180                         // if $parent['wall'] == 1 we will already have the parent message in our array
 181                         // and we will relay the whole lot.
 182
 183                         $localhost = str_replace('www.','',$a->getHostName());
 184                         if (strpos($localhost,':')) {
 185                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 186                         }
 187                         /**
 188                          *
 189                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 190                          * have been known to cause runaway conditions which affected several servers, along with
 191                          * permissions issues.
 192                          *
 193                          */
 194
 195                         $relay_to_owner = false;
 196
 197                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 198                                 $relay_to_owner = true;
 199                         }
 200
 201
 202                         if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
 203                                 $relay_to_owner = true;
 204                         }
 205
 206                         // until the 'origin' flag has been in use for several months
 207                         // we will just use it as a fallback test
 208                         // later we will be able to use it as the primary test of whether or not to relay.
 209
 210                         if (!$target_item['origin']) {
 211                                 $relay_to_owner = false;
 212                         }
 213                         if ($parent['origin']) {
 214                                 $relay_to_owner = false;
 215                         }
 216
 217                         // Special treatment for forum posts
 218                         if (Item::isForumPost($target_item, $owner)) {
 219                                 $relay_to_owner = true;
 220                                 $direct_forum_delivery = true;
 221                         }
 222
 223                         // Avoid that comments in a forum thread are sent to OStatus
 224                         if (Item::isForumPost($parent, $owner)) {
 225                                 $direct_forum_delivery = true;
 226                         }
 227
 228                         if ($relay_to_owner) {
 229                                 // local followup to remote post
 230                                 $followup = true;
 231                                 $public_message = false; // not public
 232                                 $recipients = [$parent['contact-id']];
 233                                 $recipients_followup  = [$parent['contact-id']];
 234
 235                                 Logger::log('Followup ' . $target_item['guid'] . ' to ' . $parent['contact-id'], Logger::DEBUG);
 236
 237                                 //if (!$target_item['private'] && $target_item['wall'] &&
 238                                 if (!$target_item['private'] &&
 239                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 240                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 241                                         $push_notify = true;
 242
 243                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 244                                         $push_notify = true;
 245
 246                                         if ($parent["network"] == Protocol::OSTATUS) {
 247                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 248                                                 // Currently it is work at progress
 249                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 250                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 251                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 252                                                         $recipients_followup[] = $followup_contact['id'];
 253                                                 }
 254                                                 DBA::close($followup_contacts_stmt);
 255                                         }
 256                                 }
 257
 258                                 if ($direct_forum_delivery) {
 259                                         $push_notify = false;
 260                                 }
 261
 262                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 263                         } else {
 264                                 $followup = false;
 265
 266                                 Logger::log('Distributing directly ' . $target_item["guid"], Logger::DEBUG);
 267
 268                                 // don't send deletions onward for other people's stuff
 269
 270                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 271                                         Logger::log('Ignoring delete notification for non-wall item');
 272                                         return;
 273                                 }
 274
 275                                 if (strlen($parent['allow_cid'])
 276                                         || strlen($parent['allow_gid'])
 277                                         || strlen($parent['deny_cid'])
 278                                         || strlen($parent['deny_gid'])) {
 279                                         $public_message = false; // private recipients, not public
 280                                 }
 281
 282                                 $allow_people = expand_acl($parent['allow_cid']);
 283                                 $allow_groups = Group::expand(expand_acl($parent['allow_gid']),true);
 284                                 $deny_people  = expand_acl($parent['deny_cid']);
 285                                 $deny_groups  = Group::expand(expand_acl($parent['deny_gid']));
 286
 287                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 288                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 289
 290                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== 'uplink')) {
 291                                         Worker::add($a->queue['priority'], 'Notifier', 'uplink', $target_id);
 292                                 }
 293
 294                                 foreach ($items as $item) {
 295                                         $recipients[] = $item['contact-id'];
 296                                         // pull out additional tagged people to notify (if public message)
 297                                         if ($public_message && strlen($item['inform'])) {
 298                                                 $people = explode(',',$item['inform']);
 299                                                 foreach ($people as $person) {
 300                                                         if (substr($person,0,4) === 'cid:') {
 301                                                                 $recipients[] = intval(substr($person,4));
 302                                                         } else {
 303                                                                 $url_recipients[] = substr($person,4);
 304                                                         }
 305                                                 }
 306                                         }
 307                                 }
 308
 309                                 if (count($url_recipients)) {
 310                                         Logger::log('Deliver ' . $target_item["guid"] . ' to _recipients ' . json_encode($url_recipients));
 311                                 }
 312
 313                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 314                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 315                                 $recipients = array_diff($recipients, $deny);
 316
 317                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 318                                 if (
 319                                         function_exists('imap_open')
 320                                         && !Config::get('system','imap_disabled')
 321                                         && $public_message
 322                                         && intval($target_item['pubmail'])
 323                                 ) {
 324                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 325                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 326                                                 $recipients[] = $mail_contact['id'];
 327                                         }
 328                                         DBA::close($mail_contacts_stmt);
 329                                 }
 330                         }
 331
 332                         // If the thread parent is OStatus then do some magic to distribute the messages.
 333                         // We have not only to look at the parent, since it could be a Friendica thread.
 334                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 335                                 $diaspora_delivery = false;
 336
 337                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 338
 339                                 // Send a salmon to the parent author
 340                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 341                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 342                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 343                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 344                                 }
 345
 346                                 // Send a salmon to the parent owner
 347                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 348                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 349                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 350                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 351                                 }
 352
 353                                 // Send a salmon notification to every person we mentioned in the post
 354                                 $arr = explode(',',$target_item['tag']);
 355                                 foreach ($arr as $x) {
 356                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 357                                         $matches = null;
 358                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 359                                                         $probed_contact = Probe::uri($matches[1]);
 360                                                 if ($probed_contact["notify"] != "") {
 361                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 362                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 363                                                 }
 364                                         }
 365                                 }
 366
 367                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 368                                 $networks = [Protocol::OSTATUS, Protocol::DFRN];
 369                         } else {
 370                                 $networks = [Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 371                         }
 372                 } else {
 373                         $public_message = false;
 374                 }
 375
 376                 if (empty($delivery_contacts_stmt)) {
 377                         if ($followup) {
 378                                 $recipients = $recipients_followup;
 379                         }
 380                         $condition = ['id' => $recipients, 'self' => false,
 381                                 'blocked' => false, 'pending' => false, 'archive' => false];
 382                         if (!empty($networks)) {
 383                                 $condition['network'] = $networks;
 384                         }
 385                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'network', 'protocol', 'batch'], $condition);
 386                 }
 387
 388                 $conversants = [];
 389                 $batch_delivery = false;
 390
 391                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 392                         $relay_list = [];
 393
 394                         if ($diaspora_delivery) {
 395                                 $batch_delivery = true;
 396
 397                                 $relay_list_stmt = DBA::p(
 398                                         "SELECT
 399                                                 `batch`,
 400                                                 ANY_VALUE(`id`) AS `id`,
 401                                                 ANY_VALUE(`name`) AS `name`,
 402                                                 ANY_VALUE(`network`) AS `network`,
 403                                                 ANY_VALUE(`protocol`) AS `protocol`
 404                                         FROM `contact`
 405                                         WHERE `network` = ?
 406                                         AND `batch` != ''
 407                                         AND `uid` = ?
 408                                         AND `rel` != ?
 409                                         AND NOT `blocked`
 410                                         AND NOT `pending`
 411                                         AND NOT `archive`
 412                                         GROUP BY `batch`",
 413                                         Protocol::DIASPORA,
 414                                         $owner['uid'],
 415                                         Contact::SHARING
 416                                 );
 417                                 $relay_list = DBA::toArray($relay_list_stmt);
 418
 419                                 // Fetch the participation list
 420                                 // The function will ensure that there are no duplicates
 421                                 $relay_list = Diaspora::participantsForThread($target_id, $relay_list);
 422
 423                                 // Add the relay to the list, avoid duplicates.
 424                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 425                                 if (!$followup && !Item::isForumPost($target_item, $owner)) {
 426                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 427                                 }
 428                         }
 429
 430                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 431                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 432
 433                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'url', 'name', 'network', 'protocol'], $condition));
 434
 435                         $r = array_merge($r2, $relay_list);
 436
 437                         if (DBA::isResult($r)) {
 438                                 foreach ($r as $rr) {
 439                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 440                                                 Logger::log('Skipping dropping for ' . $rr['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 441                                                 continue;
 442                                         }
 443
 444                                         if (($rr['network'] == Protocol::DFRN) && ($rr['protocol'] == Protocol::ACTIVITYPUB) &&
 445                                                 !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION])) {
 446                                                 Logger::info('Contact is Friendica AP, so skipping delivery via legacy DFRN', ['url' => $rr['url']]);
 447                                                 continue;
 448                                         }
 449
 450                                         if (Config::get('debug', 'total_ap_delivery') && !empty($rr['url']) && ($rr['network'] == Protocol::DFRN) && !empty(APContact::getByURL($rr['url'], false))) {
 451                                                 Logger::log('Skipping contact ' . $rr['url'] . ' since it will be delivered via AP', Logger::DEBUG);
 452                                                 continue;
 453                                         }
 454
 455                                         $conversants[] = $rr['id'];
 456
 457                                         $delivery_queue_count++;
 458
 459                                         Logger::log('Public delivery of item ' . $target_item["guid"] . ' (' . $target_id . ') to ' . json_encode($rr), Logger::DEBUG);
 460
 461                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 462                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 463                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 464                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 465                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 466                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 467                                         } else {
 468                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 469                                         }
 470                                         Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id']);
 471                                 }
 472                         }
 473
 474                         $push_notify = true;
 475                 }
 476
 477                 // delivery loop
 478                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 479                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 480                                 Logger::log('Skipping dropping for ' . $contact['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 481                                 continue;
 482                         }
 483
 484                         if (($contact['network'] == Protocol::DFRN) && ($contact['protocol'] == Protocol::ACTIVITYPUB) &&
 485                                 !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION])) {
 486                                 Logger::info('Contact is Friendica AP, so skipping delivery via legacy DFRN', ['url' => $contact['url']]);
 487                                 continue;
 488                         }
 489
 490                         if (Config::get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 491                                 Logger::log('Skipping contact ' . $contact['url'] . ' since it will be delivered via AP', Logger::DEBUG);
 492                                 continue;
 493                         }
 494
 495                         // Don't deliver to Diaspora if it already had been done as batch delivery
 496                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 497                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 498                                 continue;
 499                         }
 500
 501                         // Don't deliver to folks who have already been delivered to
 502                         if (in_array($contact['id'], $conversants)) {
 503                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 504                                 continue;
 505                         }
 506
 507                         $delivery_queue_count++;
 508
 509                         Logger::log('Delivery of item ' . $target_id . ' to ' . json_encode($contact), Logger::DEBUG);
 510
 511                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 512                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 513                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 514                         if ($contact['network'] == Protocol::DIASPORA) {
 515                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 516                         } else {
 517                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 518                         }
 519                         Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id']);
 520                 }
 521                 DBA::close($delivery_contacts_stmt);
 522
 523                 $url_recipients = array_filter($url_recipients);
 524                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 525                 // They are especially used for notifications to OStatus users that don't follow us.
 526                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 527                         $delivery_queue_count += count($url_recipients);
 528                         $slap = OStatus::salmon($target_item, $owner);
 529                         foreach ($url_recipients as $url) {
 530                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 531                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 532                                 Salmon::slapper($owner, $url, $slap);
 533                                 ItemDeliveryData::incrementQueueDone($target_id);
 534                         }
 535                 }
 536
 537                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 538                 if ($push_notify) {
 539                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 540
 541                         // Handling the pubsubhubbub requests
 542                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 543                 }
 544
 545                 if (!empty($target_item)) {
 546                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 547
 548                         if (in_array($cmd, [Delivery::POST, Delivery::COMMENT])) {
 549                                 ItemDeliveryData::update($target_item['id'], ['queue_count' => $delivery_queue_count]);
 550                         }
 551
 552                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 553
 554                         Hook::callAll('notifier_end', $target_item);
 555                 }
 556
 557                 return;
 558         }
 559
 560         /**
 561          * Checks if the current action is a deletion command of a account removal activity
 562          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 563          * These protocols do have a dedicated command for deleting a whole account.
 564          *
 565          * @param string $cmd     Notifier command
 566          * @param array  $owner   Sender of the post
 567          * @param string $network Receiver network
 568          * @return bool
 569          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 570          * @throws \ImagickException
 571          */
 572         private static function isRemovalActivity($cmd, $owner, $network)
 573         {
 574                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 575         }
 576
 577         /**
 578          * @param int    $self_user_id
 579          * @param int    $priority The priority the Notifier queue item was created with
 580          * @param string $created  The date the Notifier queue item was created on
 581          * @return bool
 582          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 583          * @throws \ImagickException
 584          */
 585         private static function notifySelfRemoval($self_user_id, $priority, $created)
 586         {
 587                 $owner = User::getOwnerDataById($self_user_id);
 588                 if (!$owner) {
 589                         return false;
 590                 }
 591
 592                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 593                 if (!DBA::isResult($contacts_stmt)) {
 594                         return false;
 595                 }
 596
 597                 while($contact = DBA::fetch($contacts_stmt)) {
 598                         Contact::terminateFriendship($owner, $contact, true);
 599                 }
 600                 DBA::close($contacts_stmt);
 601
 602                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 603                 foreach ($inboxes as $inbox) {
 604                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 605                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 606                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 607                 }
 608
 609                 return true;
 610         }
 611
 612         /**
 613          * @param string $cmd
 614          * @param array  $target_item
 615          * @param array  $parent
 616          * @param int    $priority The priority the Notifier queue item was created with
 617          * @param string $created  The date the Notifier queue item was created on
 618          * @return int The number of delivery tasks created
 619          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 620          * @throws \ImagickException
 621          */
 622         private static function activityPubDelivery($cmd, array $target_item, array $parent, $priority, $created, $owner)
 623         {
 624                 $inboxes = [];
 625
 626                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 627
 628                 if ($target_item['origin']) {
 629                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 630                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 631                 } elseif (Item::isForumPost($target_item, $owner)) {
 632                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 633                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 634                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 635                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 636                         return 0;
 637                 } elseif ($parent['origin']) {
 638                         // Remote items are transmitted via the personal inboxes.
 639                         // Doing so ensures that the dedicated receiver will get the message.
 640                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 641                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 642                 }
 643
 644                 if (empty($inboxes)) {
 645                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 646                         return 0;
 647                 }
 648
 649                 // Fill the item cache
 650                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 651
 652                 foreach ($inboxes as $inbox) {
 653                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 654
 655                         Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 656                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid);
 657                 }
 658
 659                 return count($inboxes);
 660         }
 661 }