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\Delivery;
  43 use Friendica\Protocol\OStatus;
  44 use Friendica\Protocol\Salmon;
  45 use Friendica\Util\Network;
  46 use Friendica\Util\Strings;
  47
  48 /*
  49  * The notifier is typically called with:
  50  *
  51  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  52  *
  53  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  54  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  55  */
  56
  57 class Notifier
  58 {
  59         public static function execute(string $cmd, int $post_uriid, int $sender_uid = 0)
  60         {
  61                 $a = DI::app();
  62
  63                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $post_uriid, 'sender_uid' => $sender_uid]);
  64
  65                 $target_id = $post_uriid;
  66                 $top_level = false;
  67                 $recipients = [];
  68                 $url_recipients = [];
  69
  70                 $delivery_contacts_stmt = null;
  71                 $target_item = [];
  72                 $parent = [];
  73                 $thr_parent = [];
  74                 $items = [];
  75                 $delivery_queue_count = 0;
  76                 $ap_contacts = [];
  77
  78                 if ($cmd == Delivery::MAIL) {
  79                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  80                         if (!DBA::isResult($message)) {
  81                                 return;
  82                         }
  83                         $uid = $message['uid'];
  84                         $recipients[] = $message['contact-id'];
  85
  86                         $mail = ActivityPub\Transmitter::getItemArrayFromMail($target_id);
  87                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  88                         foreach ($inboxes as $inbox => $receivers) {
  89                                 $ap_contacts = array_merge($ap_contacts, $receivers);
  90                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  91                                 Worker::add(['priority' => Worker::PRIORITY_HIGH, 'created' => $a->getQueueValue('created'), 'dont_fork' => true],
  92                                         'APDelivery', $cmd, $target_id, $inbox, $uid, $receivers, $post_uriid);
  93                         }
  94                 } elseif ($cmd == Delivery::SUGGESTION) {
  95                         $suggest = DI::fsuggest()->selectOneById($target_id);
  96                         $uid = $suggest->uid;
  97                         $recipients[] = $suggest->cid;
  98                 } elseif ($cmd == Delivery::REMOVAL) {
  99                         return self::notifySelfRemoval($target_id, $a->getQueueValue('priority'), $a->getQueueValue('created'));
 100                 } elseif ($cmd == Delivery::RELOCATION) {
 101                         $uid = $target_id;
 102
 103                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
 104                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'baseurl', 'gsid', 'batch'], $condition);
 105                 } else {
 106                         $post = Post::selectFirst(['id'], ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
 107                         if (!DBA::isResult($post)) {
 108                                 Logger::warning('Post not found', ['uri-id' => $post_uriid, 'uid' => $sender_uid]);
 109                                 return;
 110                         }
 111                         $target_id = $post['id'];
 112
 113                         // find ancestors
 114                         $condition = ['id' => $target_id, 'visible' => true];
 115                         $target_item = Post::selectFirst(Item::DELIVER_FIELDLIST, $condition);
 116
 117                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 118                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
 119                                 return;
 120                         }
 121
 122                         if (!empty($target_item['contact-uid'])) {
 123                                 $uid = $target_item['contact-uid'];
 124                         } elseif (!empty($target_item['uid'])) {
 125                                 $uid = $target_item['uid'];
 126                         } else {
 127                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 128                                 return;
 129                         }
 130
 131                         $condition = ['parent' => $target_item['parent'], 'visible' => true];
 132                         $params = ['order' => ['id']];
 133                         $items_stmt = Post::select(Item::DELIVER_FIELDLIST, $condition, $params);
 134                         if (!DBA::isResult($items_stmt)) {
 135                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 136                                 return;
 137                         }
 138
 139                         $items = Post::toArray($items_stmt);
 140
 141                         // avoid race condition with deleting entries
 142                         if ($items[0]['deleted']) {
 143                                 foreach ($items as $item) {
 144                                         $item['deleted'] = 1;
 145                                 }
 146                         }
 147
 148                         $top_level = $target_item['gravity'] == Item::GRAVITY_PARENT;
 149                 }
 150
 151                 $owner = User::getOwnerDataById($uid);
 152                 if (!$owner) {
 153                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 154                         return;
 155                 }
 156
 157                 // Should the post be transmitted to Diaspora?
 158                 $diaspora_delivery = ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY);
 159
 160                 // If this is a public conversation, notify the feed hub
 161                 $public_message = true;
 162
 163                 $unlisted = false;
 164
 165                 // Do a PuSH
 166                 $push_notify = false;
 167
 168                 // Deliver directly to a forum, don't PuSH
 169                 $direct_forum_delivery = false;
 170
 171                 $followup = false;
 172                 $recipients_followup = [];
 173
 174                 if (!empty($target_item) && !empty($items)) {
 175                         $parent = $items[0];
 176
 177                         $fields = ['network', 'author-id', 'author-link', 'author-network', 'owner-id'];
 178                         $condition = ['uri' => $target_item['thr-parent'], 'uid' => $target_item['uid']];
 179                         $thr_parent = Post::selectFirst($fields, $condition);
 180                         if (empty($thr_parent)) {
 181                                 $thr_parent = $parent;
 182                         }
 183
 184                         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' => $thr_parent['network']]);
 185
 186                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 187                                 $apdelivery = self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->getQueueValue('priority'), $a->getQueueValue('created'), $owner);
 188                                 $ap_contacts = $apdelivery['contacts'];
 189                                 $delivery_queue_count += $apdelivery['count'];
 190                         }
 191
 192                         // Only deliver threaded replies (comment to a comment) to Diaspora
 193                         // when the original comment author does support the Diaspora protocol.
 194                         if ($thr_parent['author-link'] && $target_item['parent-uri'] != $target_item['thr-parent']) {
 195                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 196                                 if ($diaspora_delivery && empty($target_item['signed_text'])) {
 197                                         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']]);
 198                                         $diaspora_delivery = false;
 199                                 }
 200                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 201                         }
 202
 203                         $unlisted = $target_item['private'] == Item::UNLISTED;
 204
 205                         // This is IMPORTANT!!!!
 206
 207                         // We will only send a "notify owner to relay" or followup message if the referenced post
 208                         // originated on our system by virtue of having our hostname somewhere
 209                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 210
 211                         // if $parent['wall'] == 1 we will already have the parent message in our array
 212                         // and we will relay the whole lot.
 213
 214                         $localhost = str_replace('www.','', DI::baseUrl()->getHostname());
 215                         if (strpos($localhost,':')) {
 216                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 217                         }
 218                         /**
 219                          *
 220                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 221                          * have been known to cause runaway conditions which affected several servers, along with
 222                          * permissions issues.
 223                          *
 224                          */
 225
 226                         $relay_to_owner = false;
 227
 228                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 229                                 $relay_to_owner = true;
 230                         }
 231
 232                         // until the 'origin' flag has been in use for several months
 233                         // we will just use it as a fallback test
 234                         // later we will be able to use it as the primary test of whether or not to relay.
 235
 236                         if (!$target_item['origin']) {
 237                                 $relay_to_owner = false;
 238                         }
 239                         if ($parent['origin']) {
 240                                 $relay_to_owner = false;
 241                         }
 242
 243                         // Special treatment for forum posts
 244                         if (Item::isForumPost($target_item['uri-id'])) {
 245                                 $relay_to_owner = true;
 246                                 $direct_forum_delivery = true;
 247                         }
 248
 249                         // Avoid that comments in a forum thread are sent to OStatus
 250                         if (Item::isForumPost($parent['uri-id'])) {
 251                                 $direct_forum_delivery = true;
 252                         }
 253
 254                         $exclusive_delivery = false;
 255
 256                         $exclusive_targets = Tag::getByURIId($parent['uri-id'], [Tag::EXCLUSIVE_MENTION]);
 257                         if (!empty($exclusive_targets)) {
 258                                 $exclusive_delivery = true;
 259                                 Logger::info('Possible Exclusively delivering', ['uid' => $target_item['uid'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id']]);
 260                                 foreach ($exclusive_targets as $target) {
 261                                         if (Strings::compareLink($owner['url'], $target['url'])) {
 262                                                 $exclusive_delivery = false;
 263                                                 Logger::info('False Exclusively delivering', ['uid' => $target_item['uid'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'url' => $target['url']]);
 264                                         }
 265                                 }
 266                         }
 267
 268                         if ($relay_to_owner) {
 269                                 // local followup to remote post
 270                                 $followup = true;
 271                                 $public_message = false; // not public
 272                                 $recipients = [$parent['contact-id']];
 273                                 $recipients_followup  = [$parent['contact-id']];
 274
 275                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 276
 277                                 if (($target_item['private'] != Item::PRIVATE) &&
 278                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 279                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 280                                         $push_notify = true;
 281
 282                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 283                                         $push_notify = true;
 284
 285                                         if ($parent["network"] == Protocol::OSTATUS) {
 286                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 287                                                 // Currently it is work at progress
 288                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 289                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 290                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 291                                                         $recipients_followup[] = $followup_contact['id'];
 292                                                 }
 293                                                 DBA::close($followup_contacts_stmt);
 294                                         }
 295                                 }
 296
 297                                 if ($direct_forum_delivery) {
 298                                         $push_notify = false;
 299                                 }
 300
 301                                 Logger::info('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"));
 302                         } elseif ($exclusive_delivery) {
 303                                 $followup = true;
 304
 305                                 foreach ($exclusive_targets as $target) {
 306                                         $cid = Contact::getIdForURL($target['url'], $uid, false);
 307                                         if ($cid) {
 308                                                 $recipients_followup[] = $cid;
 309                                                 Logger::info('Exclusively delivering', ['uid' => $target_item['uid'], 'guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'url' => $target['url']]);
 310                                         }
 311                                 }
 312                         } else {
 313                                 $followup = false;
 314
 315                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 316
 317                                 // don't send deletions onward for other people's stuff
 318
 319                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 320                                         Logger::notice('Ignoring delete notification for non-wall item');
 321                                         return;
 322                                 }
 323
 324                                 if (strlen($parent['allow_cid'])
 325                                         || strlen($parent['allow_gid'])
 326                                         || strlen($parent['deny_cid'])
 327                                         || strlen($parent['deny_gid'])) {
 328                                         $public_message = false; // private recipients, not public
 329                                 }
 330
 331                                 $aclFormatter = DI::aclFormatter();
 332
 333                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 334                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 335                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 336                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 337
 338                                 foreach ($items as $item) {
 339                                         $recipients[] = $item['contact-id'];
 340                                         // pull out additional tagged people to notify (if public message)
 341                                         if ($public_message && $item['inform']) {
 342                                                 $people = explode(',',$item['inform']);
 343                                                 foreach ($people as $person) {
 344                                                         if (substr($person,0,4) === 'cid:') {
 345                                                                 $recipients[] = intval(substr($person,4));
 346                                                         } else {
 347                                                                 $url_recipients[] = substr($person,4);
 348                                                         }
 349                                                 }
 350                                         }
 351                                 }
 352
 353                                 if (count($url_recipients)) {
 354                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 355                                 }
 356
 357                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 358                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 359                                 $recipients = array_diff($recipients, $deny);
 360
 361                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 362                                 if (
 363                                         function_exists('imap_open')
 364                                         && !DI::config()->get('system','imap_disabled')
 365                                         && $public_message
 366                                         && intval($target_item['pubmail'])
 367                                 ) {
 368                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 369                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 370                                                 $recipients[] = $mail_contact['id'];
 371                                         }
 372                                         DBA::close($mail_contacts_stmt);
 373                                 }
 374                         }
 375
 376                         // If the thread parent is OStatus then do some magic to distribute the messages.
 377                         // We have not only to look at the parent, since it could be a Friendica thread.
 378                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 379                                 $diaspora_delivery = false;
 380
 381                                 Logger::info('Some parent is OStatus for ' . $target_item['guid'] . ' - Author: ' . $thr_parent['author-id'] . ' - Owner: ' . $thr_parent['owner-id']);
 382
 383                                 // Send a salmon to the parent author
 384                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 385                                 if (DBA::isResult($probed_contact) && !empty($probed_contact['notify'])) {
 386                                         Logger::notice('Notify parent author', ['url' => $probed_contact['url'], 'notify' => $probed_contact['notify']]);
 387                                         $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 388                                 }
 389
 390                                 // Send a salmon to the parent owner
 391                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 392                                 if (DBA::isResult($probed_contact) && !empty($probed_contact['notify'])) {
 393                                         Logger::notice('Notify parent owner', ['url' => $probed_contact['url'], 'notify' => $probed_contact['notify']]);
 394                                         $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 395                                 }
 396
 397                                 // Send a salmon notification to every person we mentioned in the post
 398                                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION]) as $tag) {
 399                                         $probed_contact = Contact::getByURL($tag['url']);
 400                                         if (!empty($probed_contact['notify'])) {
 401                                                 Logger::notice('Notify mentioned user', ['url' => $probed_contact['url'], 'notify' => $probed_contact['notify']]);
 402                                                 $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 403                                         }
 404                                 }
 405
 406                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 407                                 $networks = [Protocol::DFRN];
 408                         } elseif ($diaspora_delivery) {
 409                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 410                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 411                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 412                                         $networks[] = Protocol::ACTIVITYPUB;
 413                                 }
 414                         } else {
 415                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 416                         }
 417                 } else {
 418                         $public_message = false;
 419                 }
 420
 421                 if (empty($delivery_contacts_stmt)) {
 422                         if ($followup) {
 423                                 $recipients = $recipients_followup;
 424                         }
 425                         $condition = ['id' => $recipients, 'self' => false, 'uid' => [0, $uid],
 426                                 'blocked' => false, 'pending' => false, 'archive' => false];
 427                         if (!empty($networks)) {
 428                                 $condition['network'] = $networks;
 429                         }
 430                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'baseurl', 'gsid', 'batch'], $condition);
 431                 }
 432
 433                 $conversants = [];
 434                 $batch_delivery = false;
 435
 436                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 437                         $participants = [];
 438
 439                         if ($diaspora_delivery && !$unlisted) {
 440                                 $batch_delivery = true;
 441
 442                                 $participants = DBA::selectToArray('contact', ['batch', 'network', 'protocol', 'baseurl', 'gsid', 'id', 'url', 'name'],
 443                                         ["`network` = ? AND `batch` != '' AND `uid` = ? AND `rel` != ? AND NOT `blocked` AND NOT `pending` AND NOT `archive`", Protocol::DIASPORA, $owner['uid'], Contact::SHARING],
 444                                         ['group_by' => ['batch', 'network', 'protocol']]);
 445
 446                                 // Fetch the participation list
 447                                 // The function will ensure that there are no duplicates
 448                                 $participants = Diaspora::participantsForThread($target_item, $participants);
 449                         }
 450
 451                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 452                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 453
 454                         $contacts = DBA::selectToArray('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol', 'baseurl', 'gsid'], $condition);
 455
 456                         $conversants = array_merge($contacts, $participants);
 457
 458                         $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, true, $conversants, $ap_contacts, []);
 459
 460                         $push_notify = true;
 461                 }
 462
 463                 $contacts = DBA::toArray($delivery_contacts_stmt);
 464                 $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, false, $contacts, $ap_contacts, $conversants);
 465
 466                 $delivery_queue_count += self::deliverOStatus($target_id, $target_item, $owner, $url_recipients, $public_message, $push_notify);
 467
 468                 if (!empty($target_item)) {
 469                         Logger::info('Calling hooks for ' . $cmd . ' ' . $target_id);
 470
 471                         Hook::fork($a->getQueueValue('priority'), 'notifier_normal', $target_item);
 472
 473                         Hook::callAll('notifier_end', $target_item);
 474
 475                         // Workaround for pure connector posts
 476                         if ($cmd == Delivery::POST) {
 477                                 if ($delivery_queue_count == 0) {
 478                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 479                                         $delivery_queue_count = 1;
 480                                 }
 481
 482                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 483                         }
 484                 }
 485
 486                 return;
 487         }
 488
 489         /**
 490          * Deliver the message to the contacts
 491          *
 492          * @param string $cmd
 493          * @param int $post_uriid
 494          * @param int $sender_uid
 495          * @param array $target_item
 496          * @param array $thr_parent
 497          * @param array $owner
 498          * @param bool $batch_delivery
 499          * @param array $contacts
 500          * @param array $ap_contacts
 501          * @param array $conversants
 502          *
 503          * @return int Count of delivery queue
 504          * @throws InternalServerErrorException
 505          * @throws Exception
 506          */
 507         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
 508         {
 509                 $a = DI::app();
 510                 $delivery_queue_count = 0;
 511
 512                 if (!empty($target_item['verb']) && ($target_item['verb'] == Activity::ANNOUNCE)) {
 513                         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' => $target_item['uri']]);
 514                         return 0;
 515                 }
 516
 517                 foreach ($contacts as $contact) {
 518                         // Direct delivery of local contacts
 519                         if (!in_array($cmd, [Delivery::RELOCATION, Delivery::SUGGESTION, Delivery::DELETION, Delivery::MAIL]) && $target_uid = User::getIdForURL($contact['url'])) {
 520                                 if ($target_item['origin'] || ($target_item['network'] != Protocol::ACTIVITYPUB)) {
 521                                         if ($target_uid != $target_item['uid']) {
 522                                                 $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH, 'post-reason' => Item::PR_DIRECT];
 523                                                 Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 524                                                 Logger::info('Delivered locally', ['cmd' => $cmd, 'id' => $target_item['id'], 'target' => $target_uid]);
 525                                         } else {
 526                                                 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']]);
 527                                         }
 528                                 } else {
 529                                         Logger::info('Remote item does not need to be delivered locally', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 530                                 }
 531                                 continue;
 532                         }
 533
 534                         // Deletions are always sent via DFRN as well.
 535                         // This is done until we can perform deletions of foreign comments on our own threads via AP.
 536                         if (($cmd != Delivery::DELETION) && in_array($contact['id'], $ap_contacts)) {
 537                                 Logger::info('Contact is already delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 538                                 continue;
 539                         }
 540
 541                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 542                                 Logger::info('Contact is archived, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 543                                 continue;
 544                         }
 545
 546                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 547                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 548                                 continue;
 549                         }
 550
 551                         if (self::skipActivityPubForDiaspora($contact, $target_item, $thr_parent)) {
 552                                 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' => $contact['url']]);
 553                                 continue;
 554                         }
 555
 556                         // Don't deliver to Diaspora if it already had been done as batch delivery
 557                         if (!$in_batch && $batch_delivery && ($contact['network'] == Protocol::DIASPORA)) {
 558                                 Logger::info('Diaspora contact is already delivered via batch', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 559                                 continue;
 560                         }
 561
 562                         // Don't deliver to folks who have already been delivered to
 563                         if (in_array($contact['id'], $conversants)) {
 564                                 Logger::info('Already delivery', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 565                                 continue;
 566                         }
 567
 568                         if (empty($contact['gsid'])) {
 569                                 $reachable = !GServer::reachable($contact);
 570                         } elseif (!DI::config()->get('system', 'bulk_delivery')) {
 571                                 $reachable = !GServer::isReachableById($contact['gsid']);
 572                         } else {
 573                                 $reachable = !GServer::isDefunctById($contact['gsid']);
 574                         }
 575
 576                         if (!$reachable) {
 577                                 Logger::info('Server is not reachable', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 578                                 continue;
 579                         }
 580
 581                         Logger::info('Delivery', ['batch' => $in_batch, 'target' => $post_uriid, 'uid' => $sender_uid, 'guid' => $target_item['guid'] ?? '', 'to' => $contact]);
 582
 583                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 584                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 585                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 586                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 587                         if (($contact['network'] == Protocol::DIASPORA) && in_array($a->getQueueValue('priority'), [Worker::PRIORITY_HIGH, Worker::PRIORITY_MEDIUM])) {
 588                                 $deliver_options = ['priority' => $a->getQueueValue('priority'), 'dont_fork' => true];
 589                         } else {
 590                                 $deliver_options = ['priority' => $a->getQueueValue('priority'), 'created' => $a->getQueueValue('created'), 'dont_fork' => true];
 591                         }
 592
 593                         if (!empty($contact['gsid']) && DI::config()->get('system', 'bulk_delivery')) {
 594                                 $delivery_queue_count++;
 595                                 Delivery::addQueue($cmd, $post_uriid, $target_item['created'], $contact['id'], $contact['gsid'], $sender_uid);
 596                                 Worker::add(['priority' => Worker::PRIORITY_HIGH, 'dont_fork' => true], 'BulkDelivery', $contact['gsid']);
 597                         } else {
 598                                 if (Worker::add($deliver_options, 'Delivery', $cmd, $post_uriid, (int)$contact['id'], $sender_uid)) {
 599                                         $delivery_queue_count++;
 600                                 }
 601                         }
 602
 603                         Worker::coolDown();
 604                 }
 605                 return $delivery_queue_count;
 606         }
 607
 608         /**
 609          * Deliver the message via OStatus
 610          *
 611          * @param int $target_id
 612          * @param array $target_item
 613          * @param array $owner
 614          * @param array $url_recipients
 615          * @param bool $public_message
 616          * @param bool $push_notify
 617          *
 618          * @return int Count of sent Salmon notifications
 619          * @throws InternalServerErrorException
 620          * @throws Exception
 621          */
 622         private static function deliverOStatus(int $target_id, array $target_item, array $owner, array $url_recipients, bool $public_message, bool $push_notify): int
 623         {
 624                 $a = DI::app();
 625                 $delivery_queue_count = 0;
 626
 627                 $url_recipients = array_filter($url_recipients);
 628                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 629                 // They are especially used for notifications to OStatus users that don't follow us.
 630                 if (count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 631                         $slap = OStatus::salmon($target_item, $owner);
 632                         foreach ($url_recipients as $url) {
 633                                 Logger::info('Salmon delivery', ['item' => $target_id, 'to' => $url]);
 634
 635                                 $delivery_queue_count++;
 636                                 Salmon::slapper($owner, $url, $slap);
 637                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 638                         }
 639                 }
 640
 641                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 642                 if ($push_notify) {
 643                         Logger::info('Activating internal PuSH', ['uid' => $owner['uid']]);
 644
 645                         // Handling the pubsubhubbub requests
 646                         PushSubscriber::publishFeed($owner['uid'], $a->getQueueValue('priority'));
 647                 }
 648                 return $delivery_queue_count;
 649         }
 650
 651         /**
 652          * Checks if the current delivery shouldn't be transported to Diaspora.
 653          * This is done for posts from AP authors or posts that are comments to AP authors.
 654          *
 655          * @param array  $contact    Receiver of the post
 656          * @param array  $item       The post
 657          * @param array  $thr_parent The thread parent
 658          *
 659          * @return bool
 660          */
 661         private static function skipActivityPubForDiaspora(array $contact, array $item, array $thr_parent): bool
 662         {
 663                 // No skipping needs to be done when delivery isn't done to Diaspora
 664                 if ($contact['network'] != Protocol::DIASPORA) {
 665                         return false;
 666                 }
 667
 668                 // Skip the delivery to Diaspora if the item is from an ActivityPub author
 669                 if (!empty($item['author-network']) && ($item['author-network'] == Protocol::ACTIVITYPUB)) {
 670                         return true;
 671                 }
 672
 673                 // Skip the delivery to Diaspora if the thread parent is from an ActivityPub author
 674                 if (!empty($thr_parent['author-network']) && ($thr_parent['author-network'] == Protocol::ACTIVITYPUB)) {
 675                         return true;
 676                 }
 677
 678                 return false;
 679         }
 680
 681         /**
 682          * Checks if the current action is a deletion command of a account removal activity
 683          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 684          * These protocols do have a dedicated command for deleting a whole account.
 685          *
 686          * @param string $cmd     Notifier command
 687          * @param array  $owner   Sender of the post
 688          * @param string $network Receiver network
 689          *
 690          * @return bool
 691          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 692          * @throws \ImagickException
 693          */
 694         private static function isRemovalActivity(string $cmd, array $owner, string $network): bool
 695         {
 696                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 697         }
 698
 699         /**
 700          * @param int    $self_user_id
 701          * @param int    $priority The priority the Notifier queue item was created with
 702          * @param string $created  The date the Notifier queue item was created on
 703          *
 704          * @return bool
 705          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 706          * @throws \ImagickException
 707          */
 708         private static function notifySelfRemoval(int $self_user_id, int $priority, string $created): bool
 709         {
 710                 $owner = User::getOwnerDataById($self_user_id);
 711                 if (empty($self_user_id) || empty($owner)) {
 712                         return false;
 713                 }
 714
 715                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 716                 if (!DBA::isResult($contacts_stmt)) {
 717                         return false;
 718                 }
 719
 720                 while($contact = DBA::fetch($contacts_stmt)) {
 721                         Contact::terminateFriendship($contact);
 722                 }
 723                 DBA::close($contacts_stmt);
 724
 725                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser($self_user_id);
 726                 foreach ($inboxes as $inbox => $receivers) {
 727                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 728                         Worker::add(['priority' => Worker::PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 729                                 'APDelivery', Delivery::REMOVAL, 0, $inbox, $self_user_id, $receivers);
 730                         Worker::coolDown();
 731                 }
 732
 733                 return true;
 734         }
 735
 736         /**
 737          * @param string $cmd
 738          * @param array  $target_item
 739          * @param array  $parent
 740          * @param array  $thr_parent
 741          * @param int    $priority The priority the Notifier queue item was created with
 742          * @param string $created  The date the Notifier queue item was created on
 743          *
 744          * @return array 'count' => The number of delivery tasks created, 'contacts' => their contact ids
 745          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 746          * @throws \ImagickException
 747          * @todo Unused parameter $owner
 748          */
 749         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, int $priority, string $created, $owner): array
 750         {
 751                 // Don't deliver via AP when the starting post isn't from a federated network
 752                 if (!in_array($parent['network'], Protocol::FEDERATED)) {
 753                         Logger::info('Parent network is no federated network, so no AP delivery', ['network' => $parent['network']]);
 754                         return ['count' => 0, 'contacts' => []];
 755                 }
 756
 757                 // Don't deliver via AP when the starting post is delivered via Diaspora
 758                 if ($parent['network'] == Protocol::DIASPORA) {
 759                         Logger::info('Parent network is Diaspora, so no AP delivery');
 760                         return ['count' => 0, 'contacts' => []];
 761                 }
 762
 763                 // Also don't deliver when the direct thread parent was delivered via Diaspora
 764                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 765                         Logger::info('Thread parent network is Diaspora, so no AP delivery');
 766                         return ['count' => 0, 'contacts' => []];
 767                 }
 768
 769                 // Posts from Diaspora contacts are transmitted via Diaspora
 770                 if ($target_item['network'] == Protocol::DIASPORA) {
 771                         Logger::info('Post network is Diaspora, so no AP delivery');
 772                         return ['count' => 0, 'contacts' => []];
 773                 }
 774
 775                 $inboxes = [];
 776                 $relay_inboxes = [];
 777
 778                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 779
 780                 // Update the locally stored follower list when we deliver to a forum
 781                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
 782                         $target_contact = Contact::getByURL(Strings::normaliseLink($tag['url']), null, [], $uid);
 783                         if ($target_contact && $target_contact['contact-type'] == Contact::TYPE_COMMUNITY && $target_contact['manually-approve']) {
 784                                 Group::updateMembersForForum($target_contact['id']);
 785                         }
 786                 }
 787
 788                 if ($target_item['origin']) {
 789                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 790
 791                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 792                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($target_item['id'], $inboxes);
 793                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes();
 794                         }
 795
 796                         Logger::info('Origin item will be distributed', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 797                 } elseif (!Post\Activity::exists($target_item['uri-id'])) {
 798                         Logger::info('Remote item is no AP post. It will not be distributed.', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 799                         return ['count' => 0, 'contacts' => []];
 800                 } elseif ($parent['origin'] && (($target_item['gravity'] != Item::GRAVITY_ACTIVITY) || DI::config()->get('system', 'redistribute_activities'))) {
 801                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, false, $target_item['id']);
 802
 803                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 804                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($parent['id'], $inboxes);
 805                         }
 806
 807                         Logger::info('Remote item will be distributed', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 808                 } else {
 809                         Logger::info('Remote activity will not be distributed', ['id' => $target_item['id'], 'url' => $target_item['uri'], 'verb' => $target_item['verb']]);
 810                         return ['count' => 0, 'contacts' => []];
 811                 }
 812
 813                 if (empty($inboxes) && empty($relay_inboxes)) {
 814                         Logger::info('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.');
 815                         return ['count' => 0, 'contacts' => []];
 816                 }
 817
 818                 // Fill the item cache
 819                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 820
 821                 $delivery_queue_count = 0;
 822                 $contacts = [];
 823
 824                 foreach ($inboxes as $inbox => $receivers) {
 825                         $contacts = array_merge($contacts, $receivers);
 826
 827                         if ((count($receivers) == 1) && Network::isLocalLink($inbox)) {
 828                                 $contact = Contact::getById($receivers[0], ['url']);
 829                                 if (!in_array($cmd, [Delivery::RELOCATION, Delivery::SUGGESTION, Delivery::DELETION, Delivery::MAIL]) && ($target_uid = User::getIdForURL($contact['url']))) {
 830                                         if ($target_item['origin'] || ($target_item['network'] != Protocol::ACTIVITYPUB)) {
 831                                                 if ($target_uid != $target_item['uid']) {
 832                                                         $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH, 'post-reason' => Item::PR_BCC];
 833                                                         Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 834                                                         Logger::info('Delivered locally', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 835                                                 } else {
 836                                                         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']]);
 837                                                 }
 838                                         } else {
 839                                                 Logger::info('Remote item does not need to be delivered locally', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 840                                         }
 841                                         continue;
 842                                 }
 843                         } elseif ((count($receivers) >= 1) && Network::isLocalLink($inbox)) {
 844                                 Logger::info('Is this a thing?', ['guid' => $target_item['guid'], 'uri-id' => $target_item['uri-id'], 'uri' => $target_item['uri']]);
 845                         }
 846
 847                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 848
 849                         if (DI::config()->get('system', 'bulk_delivery')) {
 850                                 $delivery_queue_count++;
 851                                 Post\Delivery::add($target_item['uri-id'], $uid, $inbox, $target_item['created'], $cmd, $receivers);
 852                                 Worker::add([Worker::PRIORITY_HIGH, 'dont_fork' => true], 'APDelivery', '', 0, $inbox, 0);
 853                         } else {
 854                                 if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 855                                                 'APDelivery', $cmd, $target_item['id'], $inbox, $uid, $receivers, $target_item['uri-id'])) {
 856                                         $delivery_queue_count++;
 857                                 }
 858                         }
 859                         Worker::coolDown();
 860                 }
 861
 862                 // We deliver posts to relay servers slightly delayed to priorize the direct delivery
 863                 foreach ($relay_inboxes as $inbox) {
 864                         Logger::info('Delivery to relay servers via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 865
 866                         if (DI::config()->get('system', 'bulk_delivery')) {
 867                                 $delivery_queue_count++;
 868                                 Post\Delivery::add($target_item['uri-id'], $uid, $inbox, $target_item['created'], $cmd, []);
 869                                 Worker::add([Worker::PRIORITY_MEDIUM, 'dont_fork' => true], 'APDelivery', '', 0, $inbox, 0);
 870                         } else {
 871                                 if (Worker::add(['priority' => $priority, 'dont_fork' => true], 'APDelivery', $cmd, $target_item['id'], $inbox, $uid, [], $target_item['uri-id'])) {
 872                                         $delivery_queue_count++;
 873                                 }
 874                         }
 875                         Worker::coolDown();
 876                 }
 877
 878                 return ['count' => $delivery_queue_count, 'contacts' => $contacts];
 879         }
 880 }