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