src/Worker/Notifier.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, 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                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($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->queue['created'], 'dont_fork' => true],
  90                                         'APDelivery', $cmd, $target_id, $inbox, $uid, $receivers, $post_uriid);
  91                         }
  92                 } elseif ($cmd == Delivery::SUGGESTION) {
  93                         $suggest = DI::fsuggest()->getById($target_id);
  94                         $uid = $suggest->uid;
  95                         $recipients[] = $suggest->cid;
  96                 } elseif ($cmd == Delivery::REMOVAL) {
  97                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  98                 } elseif ($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 = true;
 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::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 183
 184                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 185                                 $apdelivery = self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['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                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 195                         }
 196
 197                         $unlisted = $target_item['private'] == Item::UNLISTED;
 198
 199                         // This is IMPORTANT!!!!
 200
 201                         // We will only send a "notify owner to relay" or followup message if the referenced post
 202                         // originated on our system by virtue of having our hostname somewhere
 203                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 204
 205                         // if $parent['wall'] == 1 we will already have the parent message in our array
 206                         // and we will relay the whole lot.
 207
 208                         $localhost = str_replace('www.','', DI::baseUrl()->getHostname());
 209                         if (strpos($localhost,':')) {
 210                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 211                         }
 212                         /**
 213                          *
 214                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 215                          * have been known to cause runaway conditions which affected several servers, along with
 216                          * permissions issues.
 217                          *
 218                          */
 219
 220                         $relay_to_owner = false;
 221
 222                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 223                                 $relay_to_owner = true;
 224                         }
 225
 226                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 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, $owner)) {
 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, $owner)) {
 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::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 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($target_item['wall'])) {
 318                                         Logger::log('Ignoring delete notification for non-wall item');
 319                                         return;
 320                                 }
 321
 322                                 if (strlen($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                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 337                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 338                                 /// @todo Possibly we should not uplink when the author is the forum itself?
 339
 340                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)
 341                                         && ($target_item['verb'] != Activity::ANNOUNCE)) {
 342                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $post_uriid, $sender_uid);
 343                                 }
 344
 345                                 foreach ($items as $item) {
 346                                         $recipients[] = $item['contact-id'];
 347                                         // pull out additional tagged people to notify (if public message)
 348                                         if ($public_message && strlen($item['inform'])) {
 349                                                 $people = explode(',',$item['inform']);
 350                                                 foreach ($people as $person) {
 351                                                         if (substr($person,0,4) === 'cid:') {
 352                                                                 $recipients[] = intval(substr($person,4));
 353                                                         } else {
 354                                                                 $url_recipients[] = substr($person,4);
 355                                                         }
 356                                                 }
 357                                         }
 358                                 }
 359
 360                                 if (count($url_recipients)) {
 361                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 362                                 }
 363
 364                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 365                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 366                                 $recipients = array_diff($recipients, $deny);
 367
 368                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 369                                 if (
 370                                         function_exists('imap_open')
 371                                         && !DI::config()->get('system','imap_disabled')
 372                                         && $public_message
 373                                         && intval($target_item['pubmail'])
 374                                 ) {
 375                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 376                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 377                                                 $recipients[] = $mail_contact['id'];
 378                                         }
 379                                         DBA::close($mail_contacts_stmt);
 380                                 }
 381                         }
 382
 383                         // If the thread parent is OStatus then do some magic to distribute the messages.
 384                         // We have not only to look at the parent, since it could be a Friendica thread.
 385                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 386                                 $diaspora_delivery = false;
 387
 388                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 389
 390                                 // Send a salmon to the parent author
 391                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 392                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 393                                         Logger::notice('Notify parent author', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 394                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 395                                 }
 396
 397                                 // Send a salmon to the parent owner
 398                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 399                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 400                                         Logger::notice('Notify parent owner', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 401                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 402                                 }
 403
 404                                 // Send a salmon notification to every person we mentioned in the post
 405                                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION]) as $tag) {
 406                                         $probed_contact = Contact::getByURL($tag['url']);
 407                                         if (!empty($probed_contact['notify'])) {
 408                                                 Logger::notice('Notify mentioned user', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 409                                                 $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 410                                         }
 411                                 }
 412
 413                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 414                                 $networks = [Protocol::DFRN];
 415                         } elseif ($diaspora_delivery) {
 416                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 417                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 418                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 419                                         $networks[] = Protocol::ACTIVITYPUB;
 420                                 }
 421                         } else {
 422                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 423                         }
 424                 } else {
 425                         $public_message = false;
 426                 }
 427
 428                 if (empty($delivery_contacts_stmt)) {
 429                         if ($followup) {
 430                                 $recipients = $recipients_followup;
 431                         }
 432                         $condition = ['id' => $recipients, 'self' => false, 'uid' => [0, $uid],
 433                                 'blocked' => false, 'pending' => false, 'archive' => false];
 434                         if (!empty($networks)) {
 435                                 $condition['network'] = $networks;
 436                         }
 437                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 438                 }
 439
 440                 $conversants = [];
 441                 $batch_delivery = false;
 442
 443                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 444                         $participants = [];
 445
 446                         if ($diaspora_delivery && !$unlisted) {
 447                                 $batch_delivery = true;
 448
 449                                 $participants_stmt = DBA::p(
 450                                         "SELECT
 451                                                 `batch`, `network`, `protocol`,
 452                                                 ANY_VALUE(`id`) AS `id`,
 453                                                 ANY_VALUE(`url`) AS `url`,
 454                                                 ANY_VALUE(`name`) AS `name`
 455                                         FROM `contact`
 456                                         WHERE `network` = ?
 457                                         AND `batch` != ''
 458                                         AND `uid` = ?
 459                                         AND `rel` != ?
 460                                         AND NOT `blocked`
 461                                         AND NOT `pending`
 462                                         AND NOT `archive`
 463                                         GROUP BY `batch`, `network`, `protocol`",
 464                                         Protocol::DIASPORA,
 465                                         $owner['uid'],
 466                                         Contact::SHARING
 467                                 );
 468                                 $participants = DBA::toArray($participants_stmt);
 469
 470                                 // Fetch the participation list
 471                                 // The function will ensure that there are no duplicates
 472                                 $participants = Diaspora::participantsForThread($target_item, $participants);
 473                         }
 474
 475                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 476                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 477
 478                         $contacts = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 479
 480                         $conversants = array_merge($contacts, $participants);
 481
 482                         $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, true, $conversants, $ap_contacts, []);
 483
 484                         $push_notify = true;
 485                 }
 486
 487                 $contacts = DBA::toArray($delivery_contacts_stmt);
 488                 $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, false, $contacts, $ap_contacts, $conversants);
 489
 490                 $delivery_queue_count += self::deliverOStatus($target_id, $target_item, $owner, $url_recipients, $public_message, $push_notify);
 491
 492                 if (!empty($target_item)) {
 493                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 494
 495                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 496
 497                         Hook::callAll('notifier_end', $target_item);
 498
 499                         // Workaround for pure connector posts
 500                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 501                                 if ($delivery_queue_count == 0) {
 502                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 503                                         $delivery_queue_count = 1;
 504                                 }
 505
 506                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 507                         }
 508                 }
 509
 510                 return;
 511         }
 512
 513         /**
 514          * Deliver the message to the contacts
 515          *
 516          * @param string $cmd
 517          * @param int $post_uriid
 518          * @param int $sender_uid
 519          * @param array $target_item
 520          * @param array $thr_parent
 521          * @param array $owner
 522          * @param bool $batch_delivery
 523          * @param array $contacts
 524          * @param array $ap_contacts
 525          * @param array $conversants
 526          * @return int
 527          * @throws InternalServerErrorException
 528          * @throws Exception
 529          */
 530         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 = [])
 531         {
 532                 $a = DI::app();
 533                 $delivery_queue_count = 0;
 534
 535                 foreach ($contacts as $contact) {
 536                         // Direct delivery of local contacts
 537                         if (!in_array($cmd, [Delivery::RELOCATION, Delivery::SUGGESTION, Delivery::DELETION, Delivery::MAIL]) && $target_uid = User::getIdForURL($contact['url'])) {
 538                                 Logger::info('Direct delivery', ['uri-id' => $target_item['uri-id'], 'target' => $target_uid]);
 539                                 $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH];
 540                                 Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 541                                 continue;
 542                         }
 543
 544                         // Deletions are always sent via DFRN as well.
 545                         // This is done until we can perform deletions of foreign comments on our own threads via AP.
 546                         if (($cmd != Delivery::DELETION) && in_array($contact['id'], $ap_contacts)) {
 547                                 Logger::info('Contact is already delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 548                                 continue;
 549                         }
 550
 551                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 552                                 Logger::info('Contact is archived, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 553                                 continue;
 554                         }
 555
 556                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 557                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 558                                 continue;
 559                         }
 560
 561                         if (self::skipActivityPubForDiaspora($contact, $target_item, $thr_parent)) {
 562                                 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' => $contact['url']]);
 563                                 continue;
 564                         }
 565
 566                         // Don't deliver to Diaspora if it already had been done as batch delivery
 567                         if (!$in_batch && $batch_delivery && ($contact['network'] == Protocol::DIASPORA)) {
 568                                 Logger::info('Diaspora contact is already delivered via batch', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 569                                 continue;
 570                         }
 571
 572                         // Don't deliver to folks who have already been delivered to
 573                         if (in_array($contact['id'], $conversants)) {
 574                                 Logger::info('Already delivery', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 575                                 continue;
 576                         }
 577
 578                         Logger::info('Delivery', ['batch' => $in_batch, 'target' => $post_uriid, 'uid' => $sender_uid, 'guid' => $target_item['guid'] ?? '', 'to' => $contact]);
 579
 580                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 581                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 582                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 583                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 584                         if (($contact['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 585                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 586                         } else {
 587                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 588                         }
 589
 590                         if (Worker::add($deliver_options, 'Delivery', $cmd, $post_uriid, (int)$contact['id'], $sender_uid)) {
 591                                 $delivery_queue_count++;
 592                         }
 593                 }
 594                 return $delivery_queue_count;
 595         }
 596
 597         /**
 598          * Deliver the message via OStatus
 599          *
 600          * @param int $target_id
 601          * @param array $target_item
 602          * @param array $owner
 603          * @param array $url_recipients
 604          * @param bool $public_message
 605          * @param bool $push_notify
 606          * @return int
 607          * @throws InternalServerErrorException
 608          * @throws Exception
 609          */
 610         private static function deliverOStatus(int $target_id, array $target_item, array $owner, array $url_recipients, bool $public_message, bool $push_notify)
 611         {
 612                 $a = DI::app();
 613                 $delivery_queue_count = 0;
 614
 615                 $url_recipients = array_filter($url_recipients);
 616                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 617                 // They are especially used for notifications to OStatus users that don't follow us.
 618                 if (!DI::config()->get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 619                         $slap = OStatus::salmon($target_item, $owner);
 620                         foreach ($url_recipients as $url) {
 621                                 Logger::info('Salmon delivery', ['item' => $target_id, 'to' => $url]);
 622
 623                                 $delivery_queue_count++;
 624                                 Salmon::slapper($owner, $url, $slap);
 625                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 626                         }
 627                 }
 628
 629                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 630                 if ($push_notify) {
 631                         Logger::info('Activating internal PuSH', ['item' => $target_id]);
 632
 633                         // Handling the pubsubhubbub requests
 634                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 635                 }
 636                 return $delivery_queue_count;
 637         }
 638
 639         /**
 640          * Checks if the current delivery shouldn't be transported to Diaspora.
 641          * This is done for posts from AP authors or posts that are comments to AP authors.
 642          *
 643          * @param array  $contact    Receiver of the post
 644          * @param array  $item       The post
 645          * @param array  $thr_parent The thread parent
 646          * @return bool
 647          */
 648         private static function skipActivityPubForDiaspora(array $contact, array $item, array $thr_parent)
 649         {
 650                 // No skipping needs to be done when delivery isn't done to Diaspora
 651                 if ($contact['network'] != Protocol::DIASPORA) {
 652                         return false;
 653                 }
 654
 655                 // Skip the delivery to Diaspora if the item is from an ActivityPub author
 656                 if (!empty($item['author-network']) && ($item['author-network'] == Protocol::ACTIVITYPUB)) {
 657                         return true;
 658                 }
 659
 660                 // Skip the delivery to Diaspora if the thread parent is from an ActivityPub author
 661                 if (!empty($thr_parent['author-network']) && ($thr_parent['author-network'] == Protocol::ACTIVITYPUB)) {
 662                         return true;
 663                 }
 664
 665                 return false;
 666         }
 667
 668         /**
 669          * Checks if the current action is a deletion command of a account removal activity
 670          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 671          * These protocols do have a dedicated command for deleting a whole account.
 672          *
 673          * @param string $cmd     Notifier command
 674          * @param array  $owner   Sender of the post
 675          * @param string $network Receiver network
 676          * @return bool
 677          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 678          * @throws \ImagickException
 679          */
 680         private static function isRemovalActivity($cmd, $owner, $network)
 681         {
 682                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 683         }
 684
 685         /**
 686          * @param int    $self_user_id
 687          * @param int    $priority The priority the Notifier queue item was created with
 688          * @param string $created  The date the Notifier queue item was created on
 689          * @return bool
 690          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 691          * @throws \ImagickException
 692          */
 693         private static function notifySelfRemoval($self_user_id, $priority, $created)
 694         {
 695                 $owner = User::getOwnerDataById($self_user_id);
 696                 if (!$owner) {
 697                         return false;
 698                 }
 699
 700                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 701                 if (!DBA::isResult($contacts_stmt)) {
 702                         return false;
 703                 }
 704
 705                 while($contact = DBA::fetch($contacts_stmt)) {
 706                         Contact::terminateFriendship($owner, $contact, true);
 707                 }
 708                 DBA::close($contacts_stmt);
 709
 710                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 711                 foreach ($inboxes as $inbox => $receivers) {
 712                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 713                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 714                                 'APDelivery', Delivery::REMOVAL, 0, $inbox, $self_user_id, $receivers);
 715                 }
 716
 717                 return true;
 718         }
 719
 720         /**
 721          * @param string $cmd
 722          * @param array  $target_item
 723          * @param array  $parent
 724          * @param array  $thr_parent
 725          * @param int    $priority The priority the Notifier queue item was created with
 726          * @param string $created  The date the Notifier queue item was created on
 727          * @return array 'count' => The number of delivery tasks created, 'contacts' => their contact ids
 728          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 729          * @throws \ImagickException
 730          */
 731         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 732         {
 733                 // Don't deliver via AP when the starting post isn't from a federated network
 734                 if (!in_array($parent['network'], Protocol::FEDERATED)) {
 735                         return ['count' => 0, 'contacts' => []];
 736                 }
 737
 738                 // Don't deliver via AP when the starting post is delivered via Diaspora
 739                 if ($parent['network'] == Protocol::DIASPORA) {
 740                         return ['count' => 0, 'contacts' => []];
 741                 }
 742
 743                 // Also don't deliver when the direct thread parent was delivered via Diaspora
 744                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 745                         return ['count' => 0, 'contacts' => []];
 746                 }
 747
 748                 // Posts from Diaspora contacts are transmitted via Diaspora
 749                 if ($target_item['network'] == Protocol::DIASPORA) {
 750                         return ['count' => 0, 'contacts' => []];
 751                 }
 752
 753                 $inboxes = [];
 754                 $relay_inboxes = [];
 755
 756                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 757
 758                 if ($target_item['origin']) {
 759                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 760
 761                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 762                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($target_item['id'], $inboxes);
 763                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes();
 764                         }
 765
 766                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 767                 } elseif (Item::isForumPost($target_item, $owner)) {
 768                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 769                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 770                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 771                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 772                         return ['count' => 0, 'contacts' => []];
 773                 } elseif ($parent['origin']) {
 774                         // Remote items are transmitted via the personal inboxes.
 775                         // Doing so ensures that the dedicated receiver will get the message.
 776                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 777
 778                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 779                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($parent['id'], $inboxes);
 780                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes([]);
 781                         }
 782
 783                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 784                 }
 785
 786                 if (empty($inboxes) && empty($relay_inboxes)) {
 787                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 788                         return ['count' => 0, 'contacts' => []];
 789                 }
 790
 791                 // Fill the item cache
 792                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 793
 794                 $delivery_queue_count = 0;
 795                 $contacts = [];
 796
 797                 foreach ($inboxes as $inbox => $receivers) {
 798                         $contacts = array_merge($contacts, $receivers);
 799
 800                         if ((count($receivers) == 1) && Network::isLocalLink($inbox)) {
 801                                 $contact = Contact::getById($receivers[0], ['url']);
 802                                 if ($target_uid = User::getIdForURL($contact['url'])) {
 803                                         $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH, 'post-reason' => Item::PR_BCC];
 804                                         Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 805                                         Logger::info('Delivered locally', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 806                                         continue;
 807                                 }
 808                         }
 809
 810                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 811
 812                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 813                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid, $receivers, $target_item['uri-id'])) {
 814                                 $delivery_queue_count++;
 815                         }
 816                 }
 817
 818                 // We deliver posts to relay servers slightly delayed to priorize the direct delivery
 819                 foreach ($relay_inboxes as $inbox) {
 820                         Logger::info('Delivery to relay servers via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 821
 822                         if (Worker::add(['priority' => $priority, 'dont_fork' => true], 'APDelivery', $cmd, $target_item['id'], $inbox, $uid, [], $target_item['uri-id'])) {
 823                                 $delivery_queue_count++;
 824                         }
 825                 }
 826
 827                 return ['count' => $delivery_queue_count, 'contacts' => $contacts];
 828         }
 829
 830         /**
 831          * Check if the delivered item is a forum post
 832          *
 833          * @param array $item
 834          * @return boolean
 835          */
 836         public static function isForumPost(array $item)
 837         {
 838                 return ($item['gravity'] == GRAVITY_PARENT) && !empty($item['forum_mode']);
 839         }
 840 }