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