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