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\Relay;
  43 use Friendica\Protocol\Salmon;
  44 use Friendica\Util\Network;
  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                                 $direct_forum_delivery = true;
 250                         }
 251
 252                         if ($relay_to_owner) {
 253                                 // local followup to remote post
 254                                 $followup = true;
 255                                 $public_message = false; // not public
 256                                 $recipients = [$parent['contact-id']];
 257                                 $recipients_followup  = [$parent['contact-id']];
 258
 259                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 260
 261                                 if (($target_item['private'] != Item::PRIVATE) &&
 262                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 263                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 264                                         $push_notify = true;
 265
 266                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 267                                         $push_notify = true;
 268
 269                                         if ($parent["network"] == Protocol::OSTATUS) {
 270                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 271                                                 // Currently it is work at progress
 272                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 273                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 274                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 275                                                         $recipients_followup[] = $followup_contact['id'];
 276                                                 }
 277                                                 DBA::close($followup_contacts_stmt);
 278                                         }
 279                                 }
 280
 281                                 if ($direct_forum_delivery) {
 282                                         $push_notify = false;
 283                                 }
 284
 285                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 286                         } else {
 287                                 $followup = false;
 288
 289                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 290
 291                                 // don't send deletions onward for other people's stuff
 292
 293                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 294                                         Logger::log('Ignoring delete notification for non-wall item');
 295                                         return;
 296                                 }
 297
 298                                 if (strlen($parent['allow_cid'])
 299                                         || strlen($parent['allow_gid'])
 300                                         || strlen($parent['deny_cid'])
 301                                         || strlen($parent['deny_gid'])) {
 302                                         $public_message = false; // private recipients, not public
 303                                 }
 304
 305                                 $aclFormatter = DI::aclFormatter();
 306
 307                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 308                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 309                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 310                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 311
 312                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 313                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 314                                 /// @todo Possibly we should not uplink when the author is the forum itself?
 315
 316                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)
 317                                         && ($target_item['verb'] != Activity::ANNOUNCE)) {
 318                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $post_uriid, $sender_uid);
 319                                 }
 320
 321                                 foreach ($items as $item) {
 322                                         $recipients[] = $item['contact-id'];
 323                                         // pull out additional tagged people to notify (if public message)
 324                                         if ($public_message && strlen($item['inform'])) {
 325                                                 $people = explode(',',$item['inform']);
 326                                                 foreach ($people as $person) {
 327                                                         if (substr($person,0,4) === 'cid:') {
 328                                                                 $recipients[] = intval(substr($person,4));
 329                                                         } else {
 330                                                                 $url_recipients[] = substr($person,4);
 331                                                         }
 332                                                 }
 333                                         }
 334                                 }
 335
 336                                 if (count($url_recipients)) {
 337                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 338                                 }
 339
 340                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 341                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 342                                 $recipients = array_diff($recipients, $deny);
 343
 344                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 345                                 if (
 346                                         function_exists('imap_open')
 347                                         && !DI::config()->get('system','imap_disabled')
 348                                         && $public_message
 349                                         && intval($target_item['pubmail'])
 350                                 ) {
 351                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 352                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 353                                                 $recipients[] = $mail_contact['id'];
 354                                         }
 355                                         DBA::close($mail_contacts_stmt);
 356                                 }
 357                         }
 358
 359                         // If the thread parent is OStatus then do some magic to distribute the messages.
 360                         // We have not only to look at the parent, since it could be a Friendica thread.
 361                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 362                                 $diaspora_delivery = false;
 363
 364                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 365
 366                                 // Send a salmon to the parent author
 367                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 368                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 369                                         Logger::notice('Notify parent author', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 370                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 371                                 }
 372
 373                                 // Send a salmon to the parent owner
 374                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 375                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 376                                         Logger::notice('Notify parent owner', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 377                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 378                                 }
 379
 380                                 // Send a salmon notification to every person we mentioned in the post
 381                                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION]) as $tag) {
 382                                         $probed_contact = Contact::getByURL($tag['url']);
 383                                         if (!empty($probed_contact['notify'])) {
 384                                                 Logger::notice('Notify mentioned user', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 385                                                 $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 386                                         }
 387                                 }
 388
 389                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 390                                 $networks = [Protocol::DFRN];
 391                         } elseif ($diaspora_delivery) {
 392                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 393                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 394                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 395                                         $networks[] = Protocol::ACTIVITYPUB;
 396                                 }
 397                         } else {
 398                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 399                         }
 400                 } else {
 401                         $public_message = false;
 402                 }
 403
 404                 if (empty($delivery_contacts_stmt)) {
 405                         if ($followup) {
 406                                 $recipients = $recipients_followup;
 407                         }
 408                         $condition = ['id' => $recipients, 'self' => false, 'uid' => [0, $uid],
 409                                 'blocked' => false, 'pending' => false, 'archive' => false];
 410                         if (!empty($networks)) {
 411                                 $condition['network'] = $networks;
 412                         }
 413                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 414                 }
 415
 416                 $conversants = [];
 417                 $batch_delivery = false;
 418
 419                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 420                         $relay_list = [];
 421
 422                         if ($diaspora_delivery && !$unlisted) {
 423                                 $batch_delivery = true;
 424
 425                                 $relay_list_stmt = DBA::p(
 426                                         "SELECT
 427                                                 `batch`, `network`, `protocol`,
 428                                                 ANY_VALUE(`id`) AS `id`,
 429                                                 ANY_VALUE(`url`) AS `url`,
 430                                                 ANY_VALUE(`name`) AS `name`
 431                                         FROM `contact`
 432                                         WHERE `network` = ?
 433                                         AND `batch` != ''
 434                                         AND `uid` = ?
 435                                         AND `rel` != ?
 436                                         AND NOT `blocked`
 437                                         AND NOT `pending`
 438                                         AND NOT `archive`
 439                                         GROUP BY `batch`, `network`, `protocol`",
 440                                         Protocol::DIASPORA,
 441                                         $owner['uid'],
 442                                         Contact::SHARING
 443                                 );
 444                                 $relay_list = DBA::toArray($relay_list_stmt);
 445
 446                                 // Fetch the participation list
 447                                 // The function will ensure that there are no duplicates
 448                                 $relay_list = Diaspora::participantsForThread($target_item, $relay_list);
 449
 450                                 // Add the relay to the list, avoid duplicates.
 451                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 452                                 if (!$followup && !Item::isForumPost($target_item, $owner) && !self::isForumPost($target_item)) {
 453                                         $relay_list = Relay::getList($target_id, $relay_list, [Protocol::DFRN, Protocol::DIASPORA]);
 454                                 }
 455                         }
 456
 457                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 458                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 459
 460                         $contacts = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 461
 462                         $conversants = array_merge($contacts, $relay_list);
 463
 464                         $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, true, $conversants, $ap_contacts, []);
 465
 466                         $push_notify = true;
 467                 }
 468
 469                 $contacts = DBA::toArray($delivery_contacts_stmt);
 470                 $delivery_queue_count += self::delivery($cmd, $post_uriid, $sender_uid, $target_item, $thr_parent, $owner, $batch_delivery, false, $contacts, $ap_contacts, $conversants);
 471
 472                 $delivery_queue_count += self::deliverOStatus($target_id, $target_item, $owner, $url_recipients, $public_message, $push_notify);
 473
 474                 if (!empty($target_item)) {
 475                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 476
 477                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 478
 479                         Hook::callAll('notifier_end', $target_item);
 480
 481                         // Workaround for pure connector posts
 482                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 483                                 if ($delivery_queue_count == 0) {
 484                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 485                                         $delivery_queue_count = 1;
 486                                 }
 487
 488                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 489                         }
 490                 }
 491
 492                 return;
 493         }
 494
 495         /**
 496          * Deliver the message to the contacts
 497          *
 498          * @param string $cmd
 499          * @param int $post_uriid
 500          * @param int $sender_uid
 501          * @param array $target_item
 502          * @param array $thr_parent
 503          * @param array $owner
 504          * @param bool $batch_delivery
 505          * @param array $contacts
 506          * @param array $ap_contacts
 507          * @param array $conversants
 508          * @return int
 509          * @throws InternalServerErrorException
 510          * @throws Exception
 511          */
 512         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 = [])
 513         {
 514                 $a = DI::app();
 515                 $delivery_queue_count = 0;
 516
 517                 foreach ($contacts as $contact) {
 518                         // Direct delivery of local contacts
 519                         if ($target_uid = User::getIdForURL($contact['url'])) {
 520                                 Logger::info('Direct delivery', ['uri-id' => $target_item['uri-id'], 'target' => $target_uid]);
 521                                 $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH];
 522                                 Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 523                                 continue;
 524                         }
 525
 526                         // Deletions are always sent via DFRN as well.
 527                         // This is done until we can perform deletions of foreign comments on our own threads via AP.
 528                         if (($cmd != Delivery::DELETION) && in_array($contact['id'], $ap_contacts)) {
 529                                 Logger::info('Contact is already delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 530                                 continue;
 531                         }
 532
 533                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 534                                 Logger::info('Contact is archived, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 535                                 continue;
 536                         }
 537
 538                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 539                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact['url']]);
 540                                 continue;
 541                         }
 542
 543                         if (self::skipActivityPubForDiaspora($contact, $target_item, $thr_parent)) {
 544                                 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' => $contact['url']]);
 545                                 continue;
 546                         }
 547
 548                         // Don't deliver to Diaspora if it already had been done as batch delivery
 549                         if (!$in_batch && $batch_delivery && ($contact['network'] == Protocol::DIASPORA)) {
 550                                 Logger::info('Diaspora contact is already delivered via batch', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 551                                 continue;
 552                         }
 553
 554                         // Don't deliver to folks who have already been delivered to
 555                         if (in_array($contact['id'], $conversants)) {
 556                                 Logger::info('Already delivery', ['id' => $post_uriid, 'uid' => $sender_uid, 'contact' => $contact]);
 557                                 continue;
 558                         }
 559
 560                         Logger::info('Delivery', ['batch' => $in_batch, 'target' => $post_uriid, 'uid' => $sender_uid, 'guid' => $target_item['guid'] ?? '', 'to' => $contact]);
 561
 562                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 563                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 564                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 565                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 566                         if (($contact['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 567                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 568                         } else {
 569                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 570                         }
 571
 572                         if (Worker::add($deliver_options, 'Delivery', $cmd, $post_uriid, (int)$contact['id'], $sender_uid)) {
 573                                 $delivery_queue_count++;
 574                         }
 575                 }
 576                 return $delivery_queue_count;
 577         }
 578
 579         /**
 580          * Deliver the message via OStatus
 581          *
 582          * @param int $target_id
 583          * @param array $target_item
 584          * @param array $owner
 585          * @param array $url_recipients
 586          * @param bool $public_message
 587          * @param bool $push_notify
 588          * @return int
 589          * @throws InternalServerErrorException
 590          * @throws Exception
 591          */
 592         private static function deliverOStatus(int $target_id, array $target_item, array $owner, array $url_recipients, bool $public_message, bool $push_notify)
 593         {
 594                 $a = DI::app();
 595                 $delivery_queue_count = 0;
 596
 597                 $url_recipients = array_filter($url_recipients);
 598                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 599                 // They are especially used for notifications to OStatus users that don't follow us.
 600                 if (!DI::config()->get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 601                         $slap = OStatus::salmon($target_item, $owner);
 602                         foreach ($url_recipients as $url) {
 603                                 Logger::info('Salmon delivery', ['item' => $target_id, 'to' => $url]);
 604
 605                                 $delivery_queue_count++;
 606                                 Salmon::slapper($owner, $url, $slap);
 607                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 608                         }
 609                 }
 610
 611                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 612                 if ($push_notify) {
 613                         Logger::info('Activating internal PuSH', ['item' => $target_id]);
 614
 615                         // Handling the pubsubhubbub requests
 616                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 617                 }
 618                 return $delivery_queue_count;
 619         }
 620
 621         /**
 622          * Checks if the current delivery shouldn't be transported to Diaspora.
 623          * This is done for posts from AP authors or posts that are comments to AP authors.
 624          *
 625          * @param array  $contact    Receiver of the post
 626          * @param array  $item       The post
 627          * @param array  $thr_parent The thread parent
 628          * @return bool
 629          */
 630         private static function skipActivityPubForDiaspora(array $contact, array $item, array $thr_parent)
 631         {
 632                 // No skipping needs to be done when delivery isn't done to Diaspora
 633                 if ($contact['network'] != Protocol::DIASPORA) {
 634                         return false;
 635                 }
 636
 637                 // Skip the delivery to Diaspora if the item is from an ActivityPub author
 638                 if (!empty($item['author-network']) && ($item['author-network'] == Protocol::ACTIVITYPUB)) {
 639                         return true;
 640                 }
 641
 642                 // Skip the delivery to Diaspora if the thread parent is from an ActivityPub author
 643                 if (!empty($thr_parent['author-network']) && ($thr_parent['author-network'] == Protocol::ACTIVITYPUB)) {
 644                         return true;
 645                 }
 646
 647                 return false;
 648         }
 649
 650         /**
 651          * Checks if the current action is a deletion command of a account removal activity
 652          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 653          * These protocols do have a dedicated command for deleting a whole account.
 654          *
 655          * @param string $cmd     Notifier command
 656          * @param array  $owner   Sender of the post
 657          * @param string $network Receiver network
 658          * @return bool
 659          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 660          * @throws \ImagickException
 661          */
 662         private static function isRemovalActivity($cmd, $owner, $network)
 663         {
 664                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 665         }
 666
 667         /**
 668          * @param int    $self_user_id
 669          * @param int    $priority The priority the Notifier queue item was created with
 670          * @param string $created  The date the Notifier queue item was created on
 671          * @return bool
 672          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 673          * @throws \ImagickException
 674          */
 675         private static function notifySelfRemoval($self_user_id, $priority, $created)
 676         {
 677                 $owner = User::getOwnerDataById($self_user_id);
 678                 if (!$owner) {
 679                         return false;
 680                 }
 681
 682                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 683                 if (!DBA::isResult($contacts_stmt)) {
 684                         return false;
 685                 }
 686
 687                 while($contact = DBA::fetch($contacts_stmt)) {
 688                         Contact::terminateFriendship($owner, $contact, true);
 689                 }
 690                 DBA::close($contacts_stmt);
 691
 692                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 693                 foreach ($inboxes as $inbox => $receivers) {
 694                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 695                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 696                                 'APDelivery', Delivery::REMOVAL, 0, $inbox, $self_user_id, $receivers);
 697                 }
 698
 699                 return true;
 700         }
 701
 702         /**
 703          * @param string $cmd
 704          * @param array  $target_item
 705          * @param array  $parent
 706          * @param array  $thr_parent
 707          * @param int    $priority The priority the Notifier queue item was created with
 708          * @param string $created  The date the Notifier queue item was created on
 709          * @return array 'count' => The number of delivery tasks created, 'contacts' => their contact ids
 710          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 711          * @throws \ImagickException
 712          */
 713         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 714         {
 715                 // Don't deliver via AP when the starting post isn't from a federated network
 716                 if (!in_array($parent['network'], Protocol::FEDERATED)) {
 717                         return ['count' => 0, 'contacts' => []];
 718                 }
 719
 720                 // Don't deliver via AP when the starting post is delivered via Diaspora
 721                 if ($parent['network'] == Protocol::DIASPORA) {
 722                         return ['count' => 0, 'contacts' => []];
 723                 }
 724
 725                 // Also don't deliver when the direct thread parent was delivered via Diaspora
 726                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 727                         return ['count' => 0, 'contacts' => []];
 728                 }
 729
 730                 // Posts from Diaspora contacts are transmitted via Diaspora
 731                 if ($target_item['network'] == Protocol::DIASPORA) {
 732                         return ['count' => 0, 'contacts' => []];
 733                 }
 734
 735                 $inboxes = [];
 736                 $relay_inboxes = [];
 737
 738                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 739
 740                 if ($target_item['origin']) {
 741                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 742
 743                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 744                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($target_item['id'], $inboxes);
 745                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes();
 746                         }
 747
 748                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 749                 } elseif (Item::isForumPost($target_item, $owner)) {
 750                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 751                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 752                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 753                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 754                         return ['count' => 0, 'contacts' => []];
 755                 } elseif ($parent['origin']) {
 756                         // Remote items are transmitted via the personal inboxes.
 757                         // Doing so ensures that the dedicated receiver will get the message.
 758                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 759
 760                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 761                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($parent['id'], $inboxes);
 762                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes([]);
 763                         }
 764
 765                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 766                 }
 767
 768                 if (empty($inboxes) && empty($relay_inboxes)) {
 769                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 770                         return ['count' => 0, 'contacts' => []];
 771                 }
 772
 773                 // Fill the item cache
 774                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 775
 776                 $delivery_queue_count = 0;
 777                 $contacts = [];
 778
 779                 foreach ($inboxes as $inbox => $receivers) {
 780                         $contacts = array_merge($contacts, $receivers);
 781
 782                         if ((count($receivers) == 1) && Network::isLocalLink($inbox)) {
 783                                 $contact = Contact::getById($receivers[0], ['url']);
 784                                 if ($target_uid = User::getIdForURL($contact['url'])) {
 785                                         $fields = ['protocol' => Conversation::PARCEL_LOCAL_DFRN, 'direction' => Conversation::PUSH, 'post-reason' => Item::PR_BCC];
 786                                         Item::storeForUserByUriId($target_item['uri-id'], $target_uid, $fields, $target_item['uid']);
 787                                         Logger::info('Delivered locally', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 788                                         continue;
 789                                 }
 790                         }
 791
 792                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 793
 794                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 795                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid, $receivers, $target_item['uri-id'])) {
 796                                 $delivery_queue_count++;
 797                         }
 798                 }
 799
 800                 // We deliver posts to relay servers slightly delayed to priorize the direct delivery
 801                 foreach ($relay_inboxes as $inbox) {
 802                         Logger::info('Delivery to relay servers via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 803
 804                         if (Worker::add(['priority' => $priority, 'dont_fork' => true], 'APDelivery', $cmd, $target_item['id'], $inbox, $uid, [], $target_item['uri-id'])) {
 805                                 $delivery_queue_count++;
 806                         }
 807                 }
 808
 809                 return ['count' => $delivery_queue_count, 'contacts' => $contacts];
 810         }
 811
 812         /**
 813          * Check if the delivered item is a forum post
 814          *
 815          * @param array $item
 816          * @return boolean
 817          */
 818         public static function isForumPost(array $item)
 819         {
 820                 return ($item['gravity'] == GRAVITY_PARENT) && !empty($item['forum_mode']);
 821         }
 822 }