src/Worker/Notifier.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Worker;
  23
  24 use Friendica\Core\Hook;
  25 use Friendica\Core\Logger;
  26 use Friendica\Core\Protocol;
  27 use Friendica\Core\Worker;
  28 use Friendica\Database\DBA;
  29 use Friendica\DI;
  30 use Friendica\Model\Contact;
  31 use Friendica\Model\Conversation;
  32 use Friendica\Model\Group;
  33 use Friendica\Model\GServer;
  34 use Friendica\Model\Item;
  35 use Friendica\Model\Post;
  36 use Friendica\Model\PushSubscriber;
  37 use Friendica\Model\Tag;
  38 use Friendica\Model\User;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\Diaspora;
  42 use Friendica\Protocol\OStatus;
  43 use Friendica\Protocol\Salmon;
  44 use Friendica\Util\Network;
  45 use Friendica\Util\Strings;
  46
  47 /*
  48  * The notifier is typically called with:
  49  *
  50  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  51  *
  52  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  53  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  54  */
  55
  56 class Notifier
  57 {
  58         public static function execute(string $cmd, int $post_uriid, int $sender_uid = 0)
  59         {
  60                 $a = DI::app();
  61
  62                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $post_uriid, 'sender_uid' => $sender_uid]);
  63
  64                 $target_id = $post_uriid;
  65                 $top_level = false;
  66                 $recipients = [];
  67                 $url_recipients = [];
  68
  69                 $delivery_contacts_stmt = null;
  70                 $target_item = [];
  71                 $parent = [];
  72                 $thr_parent = [];
  73                 $items = [];
  74                 $delivery_queue_count = 0;
  75                 $ap_contacts = [];
  76
  77                 if ($cmd == Delivery::MAIL) {
  78                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  79                         if (!DBA::isResult($message)) {
  80                                 return;
  81                         }
  82                         $uid = $message['uid'];
  83                         $recipients[] = $message['contact-id'];
  84
  85                         $mail = ActivityPub\Transmitter::getItemArrayFromMail($target_id);
  86                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  87                         foreach ($inboxes as $inbox => $receivers) {
  88                                 $ap_contacts = array_merge($ap_contacts, $receivers);
  89                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  90                                 Worker::add(['priority' => Worker::PRIORITY_HIGH, 'created' => $a->getQueueValue('created'), 'dont_fork' => true],
  91                                         'APDelivery', $cmd, $target_id, $inbox, $uid, $receivers, $post_uriid);
  92                         }
  93                 } elseif ($cmd == Delivery::SUGGESTION) {
  94                         $suggest = DI::fsuggest()->selectOneById($target_id);
  95                         $uid = $suggest->uid;
  96                         $recipients[] = $suggest->cid;
  97                 } elseif ($cmd == Delivery::REMOVAL) {
  98                         return self::notifySelfRemoval($target_id, $a->getQueueValue('priority'), $a->getQueueValue('created'));
  99                 } elseif ($cmd == Delivery::RELOCATION) {
 100                         $uid = $target_id;
 101
 102                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
 103                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'baseurl', 'gsid', 'batch'], $condition);
 104                 } else {
 105                         $post = Post::selectFirst(['id'], ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
 106                         if (!DBA::isResult($post)) {
 107                                 Logger::warning('Post not found', ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
 108                                 return;
 109                         }
 110                         $target_id = $post['id'];
 111
 112                         // find ancestors
 113                         $condition = ['id' => $target_id, 'visible' => true];
 114                         $target_item = Post::selectFirst(Item::DELIVER_FIELDLIST, $condition);
 115
 116                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 117                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
 118                                 return;
 119                         }
 120
 121                         if (!empty($target_item['contact-uid'])) {
 122                                 $uid = $target_item['contact-uid'];
 123                         } elseif (!empty($target_item['uid'])) {
 124                                 $uid = $target_item['uid'];
 125                         } else {
 126                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 127                                 return;
 128                         }
 129
 130                         $condition = ['parent' => $target_item['parent'], 'visible' => true];
 131                         $params = ['order' => ['id']];
 132                         $items_stmt = Post::select(Item::DELIVER_FIELDLIST, $condition, $params);
 133                         if (!DBA::isResult($items_stmt)) {
 134                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 135                                 return;
 136                         }
 137
 138                         $items = Post::toArray($items_stmt);
 139
 140                         // avoid race condition with deleting entries
 141                         if ($items[0]['deleted']) {
 142                                 foreach ($items as $item) {
 143                                         $item['deleted'] = 1;
 144                                 }
 145                         }
 146
 147                         $top_level = $target_item['gravity'] == Item::GRAVITY_PARENT;
 148                 }
 149
 150                 $owner = User::getOwnerDataById($uid);
 151                 if (!$owner) {
 152                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 153                         return;
 154                 }
 155
 156                 // Should the post be transmitted to Diaspora?
 157                 $diaspora_delivery = ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY);
 158
 159                 // If this is a public conversation, notify the feed hub
 160                 $public_message = true;
 161
 162                 $unlisted = false;
 163
 164                 // Do a PuSH
 165                 $push_notify = false;
 166
 167                 // Deliver directly to a forum, don't PuSH
 168                 $direct_forum_delivery = false;
 169
 170                 $followup = false;
 171                 $recipients_followup = [];
 172
 173                 if (!empty($target_item) && !empty($items)) {
 174                         $parent = $items[0];
 175
 176                         $fields = ['network', 'author-id', 'author-link', 'author-network', 'owner-id'];
 177                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 178                         $thr_parent = Post::selectFirst($fields, $condition);
 179                         if (empty($thr_parent)) {
 180                                 $thr_parent = $parent;
 181                         }
 182
 183                         Logger::info('Got post', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'network' => $target_item['network'], 'parent-network' => $parent['network'], 'thread-parent-network' => $thr_parent['network']]);
 184
 185                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 186                                 $apdelivery = self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->getQueueValue('priority'), $a->getQueueValue('created'), $owner);
 187                                 $ap_contacts = $apdelivery['contacts'];
 188                                 $delivery_queue_count += $apdelivery['count'];
 189                         }
 190
 191                         // Only deliver threaded replies (comment to a comment) to Diaspora
 192                         // when the original comment author does support the Diaspora protocol.
 193                         if ($thr_parent['author-link'] && $target_item['parent-uri'] != $target_item['thr-parent']) {
 194                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 195                                 if ($diaspora_delivery && empty($target_item['signed_text'])) {
 196                                         Logger::debug('Post has got no Diaspora signature, so there will be no Diaspora delivery', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id']]);
 197                                         $diaspora_delivery = false;
 198                                 }
 199                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 200                         }
 201
 202                         $unlisted = $target_item['private'] == Item::UNLISTED;
 203
 204                         // This is IMPORTANT!!!!
 205
 206                         // We will only send a "notify owner to relay" or followup message if the referenced post
 207                         // originated on our system by virtue of having our hostname somewhere
 208                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 209
 210                         // if $parent['wall'] == 1 we will already have the parent message in our array
 211                         // and we will relay the whole lot.
 212
 213                         $localhost = str_replace('www.','', DI::baseUrl()->getHostname());
 214                         if (strpos($localhost,':')) {
 215                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 216                         }
 217                         /**
 218                          *
 219                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 220                          * have been known to cause runaway conditions which affected several servers, along with
 221                          * permissions issues.
 222                          *
 223                          */
 224
 225                         $relay_to_owner = false;
 226
 227                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 228                                 $relay_to_owner = true;
 229                         }
 230
 231                         // until the 'origin' flag has been in use for several months
 232                         // we will just use it as a fallback test
 233                         // later we will be able to use it as the primary test of whether or not to relay.
 234
 235                         if (!$target_item['origin']) {
 236                                 $relay_to_owner = false;
 237                         }
 238                         if ($parent['origin']) {
 239                                 $relay_to_owner = false;
 240                         }
 241
 242                         // Special treatment for forum posts
 243                         if (Item::isForumPost($target_item['uri-id'])) {
 244                                 $relay_to_owner = true;
 245                                 $direct_forum_delivery = true;
 246                         }
 247
 248                         // Avoid that comments in a forum thread are sent to OStatus
 249                         if (Item::isForumPost($parent['uri-id'])) {
 250                                 $direct_forum_delivery = true;
 251                         }
 252
 253                         $exclusive_delivery = false;
 254
 255                         $exclusive_targets = Tag::getByURIId($parent['uri-id'], [Tag::EXCLUSIVE_MENTION]);
 256                         if (!empty($exclusive_targets)) {
 257                                 $exclusive_delivery = true;
 258                                 Logger::info('Possible Exclusively delivering', ['uid' => $target_item['uid'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id']]);
 259                                 foreach ($exclusive_targets as $target) {
 260                                         if (Strings::compareLink($owner['url'], $target['url'])) {
 261                                                 $exclusive_delivery = false;
 262                                                 Logger::info('False Exclusively delivering', ['uid' => $target_item['uid'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'url' => $target['url']]);
 263                                         }
 264                                 }
 265                         }
 266
 267                         if ($relay_to_owner) {
 268                                 // local followup to remote post
 269                                 $followup = true;
 270                                 $public_message = false; // not public
 271                                 $recipients = [$parent['contact-id']];
 272                                 $recipients_followup  = [$parent['contact-id']];
 273
 274                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 275
 276                                 if (($target_item['private'] != Item::PRIVATE) &&
 277                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 278                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 279                                         $push_notify = true;
 280
 281                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 282                                         $push_notify = true;
 283
 284                                         if ($parent["network"] == Protocol::OSTATUS) {
 285                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 286                                                 // Currently it is work at progress
 287                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 288                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 289                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 290                                                         $recipients_followup[] = $followup_contact['id'];
 291                                                 }
 292                                                 DBA::close($followup_contacts_stmt);
 293                                         }
 294                                 }
 295
 296                                 if ($direct_forum_delivery) {
 297                                         $push_notify = false;
 298                                 }
 299
 300                                 Logger::info('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"));
 301                         } elseif ($exclusive_delivery) {
 302                                 $followup = true;
 303
 304                                 foreach ($exclusive_targets as $target) {
 305                                         $cid = Contact::getIdForURL($target['url'], $uid, false);
 306                                         if ($cid) {
 307                                                 $recipients_followup[] = $cid;
 308                                                 Logger::info('Exclusively delivering', ['uid' => $target_item['uid'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'url' => $target['url']]);
 309                                         }
 310                                 }
 311                         } else {
 312                                 $followup = false;
 313
 314                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 315
 316                                 // don't send deletions onward for other people's stuff
 317
 318                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 319                                         Logger::notice('Ignoring delete notification for non-wall item');
 320                                         return;
 321                                 }
 322
 323                                 if (strlen($parent['allow_cid'])
 324                                         || strlen($parent['allow_gid'])
 325                                         || strlen($parent['deny_cid'])
 326                                         || strlen($parent['deny_gid'])) {
 327                                         $public_message = false; // private recipients, not public
 328                                 }
 329
 330                                 $aclFormatter = DI::aclFormatter();
 331
 332                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 333                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 334                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 335                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 336
 337                                 foreach ($items as $item) {
 338                                         $recipients[] = $item['contact-id'];
 339                                         // pull out additional tagged people to notify (if public message)
 340                                         if ($public_message && $item['inform']) {
 341                                                 $people = explode(',',$item['inform']);
 342                                                 foreach ($people as $person) {
 343                                                         if (substr($person,0,4) === 'cid:') {
 344                                                                 $recipients[] = intval(substr($person,4));
 345                                                         } else {
 346                                                                 $url_recipients[] = substr($person,4);
 347                                                         }
 348                                                 }
 349                                         }
 350                                 }
 351
 352                                 if (count($url_recipients)) {
 353                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 354                                 }
 355
 356                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 357                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 358                                 $recipients = array_diff($recipients, $deny);
 359
 360                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 361                                 if (
 362                                         function_exists('imap_open')
 363                                         && !DI::config()->get('system','imap_disabled')
 364                                         && $public_message
 365                                         && intval($target_item['pubmail'])
 366                                 ) {
 367                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 368                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 369                                                 $recipients[] = $mail_contact['id'];
 370                                         }
 371                                         DBA::close($mail_contacts_stmt);
 372                                 }
 373                         }
 374
 375                         // If the thread parent is OStatus then do some magic to distribute the messages.
 376                         // We have not only to look at the parent, since it could be a Friendica thread.
 377                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 378                                 $diaspora_delivery = false;
 379
 380                                 Logger::info('Some parent is OStatus for ' . $target_item['guid'] . ' - Author: ' . $thr_parent['author-id'] . ' - Owner: ' . $thr_parent['owner-id']);
 381
 382                                 // Send a salmon to the parent author
 383                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 384                                 if (DBA::isResult($probed_contact) && !empty($probed_contact['notify'])) {
 385                                         Logger::notice('Notify parent author', ['url' => $probed_contact['url'], 'notify' => $probed_contact['notify']]);
 386                                         $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 387                                 }
 388
 389                                 // Send a salmon to the parent owner
 390                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 391                                 if (DBA::isResult($probed_contact) && !empty($probed_contact['notify'])) {
 392                                         Logger::notice('Notify parent owner', ['url' => $probed_contact['url'], 'notify' => $probed_contact['notify']]);
 393                                         $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 394                                 }
 395
 396                                 // Send a salmon notification to every person we mentioned in the post
 397                                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION]) as $tag) {
 398                                         $probed_contact = Contact::getByURL($tag['url']);
 399                                         if (!empty($probed_contact['notify'])) {
 400                                                 Logger::notice('Notify mentioned user', ['url' => $probed_contact['url'], 'notify' => $probed_contact['notify']]);
 401                                                 $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 402                                         }
 403                                 }
 404
 405                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 406                                 $networks = [Protocol::DFRN];
 407                         } elseif ($diaspora_delivery) {
 408                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 409                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 410                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 411                                         $networks[] = Protocol::ACTIVITYPUB;
 412                                 }
 413                         } else {
 414                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 415                         }
 416                 } else {
 417                         $public_message = false;
 418                 }
 419
 420                 if (empty($delivery_contacts_stmt)) {
 421                         if ($followup) {
 422                                 $recipients = $recipients_followup;
 423                         }
 424                         $condition = ['id' => $recipients, 'self' => false, 'uid' => [0, $uid],
 425                                 'blocked' => false, 'pending' => false, 'archive' => false];
 426                         if (!empty($networks)) {
 427                                 $condition['network'] = $networks;
 428                         }
 429                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'baseurl', 'gsid', 'batch'], $condition);
 430                 }
 431
 432                 $conversants = [];
 433                 $batch_delivery = false;
 434
 435                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 436                         $participants = [];
 437
 438                         if ($diaspora_delivery && !$unlisted) {
 439                                 $batch_delivery = true;
 440
 441                                 $participants = DBA::selectToArray('contact', ['batch', 'network', 'protocol', 'baseurl', 'gsid', 'id', 'url', 'name'],
 442                                         ["`network` = ? AND `batch` != '' AND `uid` = ? AND `rel` != ? AND NOT `blocked` AND NOT `pending` AND NOT `archive`", Protocol::DIASPORA, $owner['uid'], Contact::SHARING],
 443                                         ['group_by' => ['batch', 'network', 'protocol']]);
 444
 445                                 // Fetch the participation list
 446                                 // The function will ensure that there are no duplicates
 447                                 $participants = Diaspora::participantsForThread($target_item, $participants);
 448                         }
 449
 450                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 451                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 452
 453                         $contacts = DBA::selectToArray('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol', 'baseurl', 'gsid'], $condition);
 454
 455                         $conversants = array_merge($contacts, $participants);
 456
 457                         $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, true, $conversants, $ap_contacts, []);
 458
 459                         $push_notify = true;
 460                 }
 461
 462                 $contacts = DBA::toArray($delivery_contacts_stmt);
 463                 $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, false, $contacts, $ap_contacts, $conversants);
 464
 465                 $delivery_queue_count += self::deliverOStatus($target_id, $target_item, $owner, $url_recipients, $public_message, $push_notify);
 466
 467                 if (!empty($target_item)) {
 468                         Logger::info('Calling hooks for ' . $cmd . ' ' . $target_id);
 469
 470                         Hook::fork($a->getQueueValue('priority'), 'notifier_normal', $target_item);
 471
 472                         Hook::callAll('notifier_end', $target_item);
 473
 474                         // Workaround for pure connector posts
 475                         if ($cmd == Delivery::POST) {
 476                                 if ($delivery_queue_count == 0) {
 477                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 478                                         $delivery_queue_count = 1;
 479                                 }
 480
 481                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 482                         }
 483                 }
 484
 485                 return;
 486         }
 487
 488         /**
 489          * Deliver the message to the contacts
 490          *
 491          * @param string $cmd
 492          * @param int $post_uriid
 493          * @param int $sender_uid
 494          * @param array $target_item
 495          * @param array $thr_parent
 496          * @param array $owner
 497          * @param bool $batch_delivery
 498          * @param array $contacts
 499          * @param array $ap_contacts
 500          * @param array $conversants
 501          *
 502          * @return int Count of delivery queue
 503          * @throws InternalServerErrorException
 504          * @throws Exception
 505          */
 506         private static function delivery(string $cmd, int $post_uriid, int $sender_uid, array $target_item, array $thr_parent, array $owner, bool $batch_delivery, bool $in_batch, array $contacts, array $ap_contacts, array $conversants = []): int
 507         {
 508                 $a = DI::app();
 509                 $delivery_queue_count = 0;
 510
 511                 if (!empty($target_item['verb']) && ($target_item['verb'] == Activity::ANNOUNCE)) {
 512                         Logger::notice('Announces are only delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 513                         return 0;
 514                 }
 515
 516                 foreach ($contacts as $contact) {
 517                         // Direct delivery of local contacts
 518                         if (!in_array($cmd, [Delivery::RELOCATION, Delivery::SUGGESTION, Delivery::DELETION, Delivery::MAIL]) && $target_uid = User::getIdForURL($contact['url'])) {
 519                                 if ($target_item['origin'] || ($target_item['network'] != Protocol::ACTIVITYPUB)) {
 520                                         if ($target_uid != $target_item['uid']) {
 521                                                 $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH, 'post-reason' => Item::PR_DIRECT];
 522                                                 Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 523                                                 Logger::info('Delivered locally', ['cmd' => $cmd, 'id' => $target_item['id'], 'target' => $target_uid]);
 524                                         } else {
 525                                                 Logger::info('No need to deliver to myself', ['uid' => $target_uid, 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 526                                         }
 527                                 } else {
 528                                         Logger::info('Remote item does not need to be delivered locally', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 529                                 }
 530                                 continue;
 531                         }
 532
 533                         // Deletions are always sent via DFRN as well.
 534                         // This is done until we can perform deletions of foreign comments on our own threads via AP.
 535                         if (($cmd != Delivery::DELETION) && in_array($contact['id'], $ap_contacts)) {
 536                                 Logger::info('Contact is already delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 537                                 continue;
 538                         }
 539
 540                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 541                                 Logger::info('Contact is archived, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 542                                 continue;
 543                         }
 544
 545                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 546                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 547                                 continue;
 548                         }
 549
 550                         if (self::skipActivityPubForDiaspora($contact, $target_item, $thr_parent)) {
 551                                 Logger::info('Contact is from Diaspora, but the replied author is from ActivityPub, so skip delivery via Diaspora', ['id' => $post_uriid, 'uid' => $sender_uid, 'url' => $contact['url']]);
 552                                 continue;
 553                         }
 554
 555                         // Don't deliver to Diaspora if it already had been done as batch delivery
 556                         if (!$in_batch && $batch_delivery && ($contact['network'] == Protocol::DIASPORA)) {
 557                                 Logger::info('Diaspora contact is already delivered via batch', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 558                                 continue;
 559                         }
 560
 561                         // Don't deliver to folks who have already been delivered to
 562                         if (in_array($contact['id'], $conversants)) {
 563                                 Logger::info('Already delivery', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 564                                 continue;
 565                         }
 566
 567                         if (!GServer::reachable($contact)) {
 568                                 Logger::info('Server is not reachable', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 569                                 continue;
 570                         }
 571
 572                         Logger::info('Delivery', ['batch' => $in_batch, 'target' => $post_uriid, 'uid' => $sender_uid, 'guid' => $target_item['guid'] ?? '', 'to' => $contact]);
 573
 574                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 575                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 576                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 577                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 578                         if (($contact['network'] == Protocol::DIASPORA) && in_array($a->getQueueValue('priority'), [Worker::PRIORITY_HIGH, Worker::PRIORITY_MEDIUM])) {
 579                                 $deliver_options = ['priority' => $a->getQueueValue('priority'), 'dont_fork' => true];
 580                         } else {
 581                                 $deliver_options = ['priority' => $a->getQueueValue('priority'), 'created' => $a->getQueueValue('created'), 'dont_fork' => true];
 582                         }
 583
 584                         if (Worker::add($deliver_options, 'Delivery', $cmd, $post_uriid, (int)$contact['id'], $sender_uid)) {
 585                                 $delivery_queue_count++;
 586                         }
 587                         Worker::coolDown();
 588                 }
 589                 return $delivery_queue_count;
 590         }
 591
 592         /**
 593          * Deliver the message via OStatus
 594          *
 595          * @param int $target_id
 596          * @param array $target_item
 597          * @param array $owner
 598          * @param array $url_recipients
 599          * @param bool $public_message
 600          * @param bool $push_notify
 601          *
 602          * @return int Count of sent Salmon notifications
 603          * @throws InternalServerErrorException
 604          * @throws Exception
 605          */
 606         private static function deliverOStatus(int $target_id, array $target_item, array $owner, array $url_recipients, bool $public_message, bool $push_notify): int
 607         {
 608                 $a = DI::app();
 609                 $delivery_queue_count = 0;
 610
 611                 $url_recipients = array_filter($url_recipients);
 612                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 613                 // They are especially used for notifications to OStatus users that don't follow us.
 614                 if (count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 615                         $slap = OStatus::salmon($target_item, $owner);
 616                         foreach ($url_recipients as $url) {
 617                                 Logger::info('Salmon delivery', ['item' => $target_id, 'to' => $url]);
 618
 619                                 $delivery_queue_count++;
 620                                 Salmon::slapper($owner, $url, $slap);
 621                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 622                         }
 623                 }
 624
 625                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 626                 if ($push_notify) {
 627                         Logger::info('Activating internal PuSH', ['uid' => $owner['uid']]);
 628
 629                         // Handling the pubsubhubbub requests
 630                         PushSubscriber::publishFeed($owner['uid'], $a->getQueueValue('priority'));
 631                 }
 632                 return $delivery_queue_count;
 633         }
 634
 635         /**
 636          * Checks if the current delivery shouldn't be transported to Diaspora.
 637          * This is done for posts from AP authors or posts that are comments to AP authors.
 638          *
 639          * @param array  $contact    Receiver of the post
 640          * @param array  $item       The post
 641          * @param array  $thr_parent The thread parent
 642          *
 643          * @return bool
 644          */
 645         private static function skipActivityPubForDiaspora(array $contact, array $item, array $thr_parent): bool
 646         {
 647                 // No skipping needs to be done when delivery isn't done to Diaspora
 648                 if ($contact['network'] != Protocol::DIASPORA) {
 649                         return false;
 650                 }
 651
 652                 // Skip the delivery to Diaspora if the item is from an ActivityPub author
 653                 if (!empty($item['author-network']) && ($item['author-network'] == Protocol::ACTIVITYPUB)) {
 654                         return true;
 655                 }
 656
 657                 // Skip the delivery to Diaspora if the thread parent is from an ActivityPub author
 658                 if (!empty($thr_parent['author-network']) && ($thr_parent['author-network'] == Protocol::ACTIVITYPUB)) {
 659                         return true;
 660                 }
 661
 662                 return false;
 663         }
 664
 665         /**
 666          * Checks if the current action is a deletion command of a account removal activity
 667          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 668          * These protocols do have a dedicated command for deleting a whole account.
 669          *
 670          * @param string $cmd     Notifier command
 671          * @param array  $owner   Sender of the post
 672          * @param string $network Receiver network
 673          *
 674          * @return bool
 675          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 676          * @throws \ImagickException
 677          */
 678         private static function isRemovalActivity(string $cmd, array $owner, string $network): bool
 679         {
 680                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 681         }
 682
 683         /**
 684          * @param int    $self_user_id
 685          * @param int    $priority The priority the Notifier queue item was created with
 686          * @param string $created  The date the Notifier queue item was created on
 687          *
 688          * @return bool
 689          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 690          * @throws \ImagickException
 691          */
 692         private static function notifySelfRemoval(int $self_user_id, int $priority, string $created): bool
 693         {
 694                 $owner = User::getOwnerDataById($self_user_id);
 695                 if (empty($self_user_id) || empty($owner)) {
 696                         return false;
 697                 }
 698
 699                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 700                 if (!DBA::isResult($contacts_stmt)) {
 701                         return false;
 702                 }
 703
 704                 while($contact = DBA::fetch($contacts_stmt)) {
 705                         Contact::terminateFriendship($contact);
 706                 }
 707                 DBA::close($contacts_stmt);
 708
 709                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser($self_user_id);
 710                 foreach ($inboxes as $inbox => $receivers) {
 711                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 712                         Worker::add(['priority' => Worker::PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 713                                 'APDelivery', Delivery::REMOVAL, 0, $inbox, $self_user_id, $receivers);
 714                         Worker::coolDown();
 715                 }
 716
 717                 return true;
 718         }
 719
 720         /**
 721          * @param string $cmd
 722          * @param array  $target_item
 723          * @param array  $parent
 724          * @param array  $thr_parent
 725          * @param int    $priority The priority the Notifier queue item was created with
 726          * @param string $created  The date the Notifier queue item was created on
 727          *
 728          * @return array 'count' => The number of delivery tasks created, 'contacts' => their contact ids
 729          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 730          * @throws \ImagickException
 731          * @todo Unused parameter $owner
 732          */
 733         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, int $priority, string $created, $owner): array
 734         {
 735                 // Don't deliver via AP when the starting post isn't from a federated network
 736                 if (!in_array($parent['network'], Protocol::FEDERATED)) {
 737                         Logger::info('Parent network is no federated network, so no AP delivery', ['network' => $parent['network']]);
 738                         return ['count' => 0, 'contacts' => []];
 739                 }
 740
 741                 // Don't deliver via AP when the starting post is delivered via Diaspora
 742                 if ($parent['network'] == Protocol::DIASPORA) {
 743                         Logger::info('Parent network is Diaspora, so no AP delivery');
 744                         return ['count' => 0, 'contacts' => []];
 745                 }
 746
 747                 // Also don't deliver when the direct thread parent was delivered via Diaspora
 748                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 749                         Logger::info('Thread parent network is Diaspora, so no AP delivery');
 750                         return ['count' => 0, 'contacts' => []];
 751                 }
 752
 753                 // Posts from Diaspora contacts are transmitted via Diaspora
 754                 if ($target_item['network'] == Protocol::DIASPORA) {
 755                         Logger::info('Post network is Diaspora, so no AP delivery');
 756                         return ['count' => 0, 'contacts' => []];
 757                 }
 758
 759                 $inboxes = [];
 760                 $relay_inboxes = [];
 761
 762                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 763
 764                 // Update the locally stored follower list when we deliver to a forum
 765                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
 766                         $target_contact = Contact::getByURL(Strings::normaliseLink($tag['url']), null, [], $uid);
 767                         if ($target_contact && $target_contact['contact-type'] == Contact::TYPE_COMMUNITY && $target_contact['manually-approve']) {
 768                                 Group::updateMembersForForum($target_contact['id']);
 769                         }
 770                 }
 771
 772                 if ($target_item['origin']) {
 773                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 774
 775                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 776                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($target_item['id'], $inboxes);
 777                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes();
 778                         }
 779
 780                         Logger::info('Origin item will be distributed', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 781                 } elseif (!Post\Activity::exists($target_item['uri-id'])) {
 782                         Logger::info('Remote item is no AP post. It will not be distributed.', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 783                         return ['count' => 0, 'contacts' => []];
 784                 } elseif ($parent['origin'] && (($target_item['gravity'] != Item::GRAVITY_ACTIVITY) || DI::config()->get('system', 'redistribute_activities'))) {
 785                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, false, $target_item['id']);
 786
 787                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 788                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($parent['id'], $inboxes);
 789                         }
 790
 791                         Logger::info('Remote item will be distributed', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 792                 } else {
 793                         Logger::info('Remote activity will not be distributed', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 794                         return ['count' => 0, 'contacts' => []];
 795                 }
 796
 797                 if (empty($inboxes) && empty($relay_inboxes)) {
 798                         Logger::info('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.');
 799                         return ['count' => 0, 'contacts' => []];
 800                 }
 801
 802                 // Fill the item cache
 803                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 804
 805                 $delivery_queue_count = 0;
 806                 $contacts = [];
 807
 808                 foreach ($inboxes as $inbox => $receivers) {
 809                         $contacts = array_merge($contacts, $receivers);
 810
 811                         if ((count($receivers) == 1) && Network::isLocalLink($inbox)) {
 812                                 $contact = Contact::getById($receivers[0], ['url']);
 813                                 if (!in_array($cmd, [Delivery::RELOCATION, Delivery::SUGGESTION, Delivery::DELETION, Delivery::MAIL]) && ($target_uid = User::getIdForURL($contact['url']))) {
 814                                         if ($target_item['origin'] || ($target_item['network'] != Protocol::ACTIVITYPUB)) {
 815                                                 if ($target_uid != $target_item['uid']) {
 816                                                         $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH, 'post-reason' => Item::PR_BCC];
 817                                                         Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 818                                                         Logger::info('Delivered locally', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 819                                                 } else {
 820                                                         Logger::info('No need to deliver to myself', ['uid' => $target_uid, 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 821                                                 }
 822                                         } else {
 823                                                 Logger::info('Remote item does not need to be delivered locally', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 824                                         }
 825                                         continue;
 826                                 }
 827                         } elseif ((count($receivers) >= 1) && Network::isLocalLink($inbox)) {
 828                                 Logger::info('Is this a thing?', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 829                         }
 830
 831                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 832
 833                         if (DI::config()->get('system', 'bulk_delivery')) {
 834                                 $delivery_queue_count++;
 835                                 Post\Delivery::add($target_item['uri-id'], $uid, $inbox, $target_item['created'], $cmd, $receivers);
 836                                 Worker::add(Worker::PRIORITY_HIGH, 'APDelivery', '', 0, $inbox, 0);
 837                         } else {
 838                                 if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 839                                                 'APDelivery', $cmd, $target_item['id'], $inbox, $uid, $receivers, $target_item['uri-id'])) {
 840                                         $delivery_queue_count++;
 841                                 }
 842                         }
 843                         Worker::coolDown();
 844                 }
 845
 846                 // We deliver posts to relay servers slightly delayed to priorize the direct delivery
 847                 foreach ($relay_inboxes as $inbox) {
 848                         Logger::info('Delivery to relay servers via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 849
 850                         if (DI::config()->get('system', 'bulk_delivery')) {
 851                                 $delivery_queue_count++;
 852                                 Post\Delivery::add($target_item['uri-id'], $uid, $inbox, $target_item['created'], $cmd, []);
 853                                 Worker::add(Worker::PRIORITY_MEDIUM, 'APDelivery', '', 0, $inbox, 0);
 854                         } else {
 855                                 if (Worker::add(['priority' => $priority, 'dont_fork' => true], 'APDelivery', $cmd, $target_item['id'], $inbox, $uid, [], $target_item['uri-id'])) {
 856                                         $delivery_queue_count++;
 857                                 }
 858                         }
 859                         Worker::coolDown();
 860                 }
 861
 862                 return ['count' => $delivery_queue_count, 'contacts' => $contacts];
 863         }
 864 }