src/Worker/Notifier.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   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
  45 /*
  46  * The notifier is typically called with:
  47  *
  48  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  49  *
  50  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  51  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  52  */
  53
  54 class Notifier
  55 {
  56         public static function execute($cmd, $target_id)
  57         {
  58                 $a = DI::app();
  59
  60                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id]);
  61
  62                 $top_level = false;
  63                 $recipients = [];
  64                 $url_recipients = [];
  65
  66                 $delivery_contacts_stmt = null;
  67                 $target_item = [];
  68                 $parent = [];
  69                 $thr_parent = [];
  70                 $items = [];
  71                 $delivery_queue_count = 0;
  72                 $ap_contacts = [];
  73
  74                 if ($cmd == Delivery::MAIL) {
  75                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  76                         if (!DBA::isResult($message)) {
  77                                 return;
  78                         }
  79                         $uid = $message['uid'];
  80                         $recipients[] = $message['contact-id'];
  81
  82                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  83                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  84                         foreach ($inboxes as $inbox => $receivers) {
  85                                 $ap_contacts = array_merge($ap_contacts, $receivers);
  86                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  87                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  88                                         'APDelivery', $cmd, $target_id, $inbox, $uid, $receivers);
  89                         }
  90                 } elseif ($cmd == Delivery::SUGGESTION) {
  91                         $suggest = DI::fsuggest()->getById($target_id);
  92                         $uid = $suggest->uid;
  93                         $recipients[] = $suggest->cid;
  94                 } elseif ($cmd == Delivery::REMOVAL) {
  95                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  96                 } elseif ($cmd == Delivery::RELOCATION) {
  97                         $uid = $target_id;
  98
  99                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
 100                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'batch'], $condition);
 101                 } else {
 102                         // find ancestors
 103                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
 104                         $target_item = Post::selectFirst([], $condition);
 105
 106                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 107                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
 108                                 return;
 109                         }
 110
 111                         if (!empty($target_item['contact-uid'])) {
 112                                 $uid = $target_item['contact-uid'];
 113                         } elseif (!empty($target_item['uid'])) {
 114                                 $uid = $target_item['uid'];
 115                         } else {
 116                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 117                                 return;
 118                         }
 119
 120                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 121                         $params = ['order' => ['id']];
 122                         $items_stmt = Post::select([], $condition, $params);
 123                         if (!DBA::isResult($items_stmt)) {
 124                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 125                                 return;
 126                         }
 127
 128                         $items = Post::toArray($items_stmt);
 129
 130                         // avoid race condition with deleting entries
 131                         if ($items[0]['deleted']) {
 132                                 foreach ($items as $item) {
 133                                         $item['deleted'] = 1;
 134                                 }
 135                         }
 136
 137                         $top_level = $target_item['gravity'] == GRAVITY_PARENT;
 138                 }
 139
 140                 $owner = User::getOwnerDataById($uid);
 141                 if (!$owner) {
 142                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 143                         return;
 144                 }
 145
 146                 // Should the post be transmitted to Diaspora?
 147                 $diaspora_delivery = true;
 148
 149                 // If this is a public conversation, notify the feed hub
 150                 $public_message = true;
 151
 152                 $unlisted = false;
 153
 154                 // Do a PuSH
 155                 $push_notify = false;
 156
 157                 // Deliver directly to a forum, don't PuSH
 158                 $direct_forum_delivery = false;
 159
 160                 $followup = false;
 161                 $recipients_followup = [];
 162
 163                 if (!empty($target_item) && !empty($items)) {
 164                         $parent = $items[0];
 165
 166                         $fields = ['network', 'author-id', 'author-link', 'author-network', 'owner-id'];
 167                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 168                         $thr_parent = Post::selectFirst($fields, $condition);
 169                         if (empty($thr_parent)) {
 170                                 $thr_parent = $parent;
 171                         }
 172
 173                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 174
 175                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 176                                 $apdelivery = self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['created'], $owner);
 177                                 $ap_contacts = $apdelivery['contacts'];
 178                                 $delivery_queue_count += $apdelivery['count'];
 179                         }
 180
 181                         // Only deliver threaded replies (comment to a comment) to Diaspora
 182                         // when the original comment author does support the Diaspora protocol.
 183                         if ($thr_parent['author-link'] && $target_item['parent-uri'] != $target_item['thr-parent']) {
 184                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 185                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 186                         }
 187
 188                         $unlisted = $target_item['private'] == Item::UNLISTED;
 189
 190                         // This is IMPORTANT!!!!
 191
 192                         // We will only send a "notify owner to relay" or followup message if the referenced post
 193                         // originated on our system by virtue of having our hostname somewhere
 194                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 195
 196                         // if $parent['wall'] == 1 we will already have the parent message in our array
 197                         // and we will relay the whole lot.
 198
 199                         $localhost = str_replace('www.','', DI::baseUrl()->getHostname());
 200                         if (strpos($localhost,':')) {
 201                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 202                         }
 203                         /**
 204                          *
 205                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 206                          * have been known to cause runaway conditions which affected several servers, along with
 207                          * permissions issues.
 208                          *
 209                          */
 210
 211                         $relay_to_owner = false;
 212
 213                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 214                                 $relay_to_owner = true;
 215                         }
 216
 217                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 218                                 $relay_to_owner = true;
 219                         }
 220
 221                         // until the 'origin' flag has been in use for several months
 222                         // we will just use it as a fallback test
 223                         // later we will be able to use it as the primary test of whether or not to relay.
 224
 225                         if (!$target_item['origin']) {
 226                                 $relay_to_owner = false;
 227                         }
 228                         if ($parent['origin']) {
 229                                 $relay_to_owner = false;
 230                         }
 231
 232                         // Special treatment for forum posts
 233                         if (Item::isForumPost($target_item, $owner)) {
 234                                 $relay_to_owner = true;
 235                                 $direct_forum_delivery = true;
 236                         }
 237
 238                         // Avoid that comments in a forum thread are sent to OStatus
 239                         if (Item::isForumPost($parent, $owner)) {
 240                                 $direct_forum_delivery = true;
 241                         }
 242
 243                         if ($relay_to_owner) {
 244                                 // local followup to remote post
 245                                 $followup = true;
 246                                 $public_message = false; // not public
 247                                 $recipients = [$parent['contact-id']];
 248                                 $recipients_followup  = [$parent['contact-id']];
 249
 250                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 251
 252                                 if (($target_item['private'] != Item::PRIVATE) &&
 253                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 254                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 255                                         $push_notify = true;
 256
 257                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 258                                         $push_notify = true;
 259
 260                                         if ($parent["network"] == Protocol::OSTATUS) {
 261                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 262                                                 // Currently it is work at progress
 263                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 264                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 265                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 266                                                         $recipients_followup[] = $followup_contact['id'];
 267                                                 }
 268                                                 DBA::close($followup_contacts_stmt);
 269                                         }
 270                                 }
 271
 272                                 if ($direct_forum_delivery) {
 273                                         $push_notify = false;
 274                                 }
 275
 276                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 277                         } else {
 278                                 $followup = false;
 279
 280                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 281
 282                                 // don't send deletions onward for other people's stuff
 283
 284                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 285                                         Logger::log('Ignoring delete notification for non-wall item');
 286                                         return;
 287                                 }
 288
 289                                 if (strlen($parent['allow_cid'])
 290                                         || strlen($parent['allow_gid'])
 291                                         || strlen($parent['deny_cid'])
 292                                         || strlen($parent['deny_gid'])) {
 293                                         $public_message = false; // private recipients, not public
 294                                 }
 295
 296                                 $aclFormatter = DI::aclFormatter();
 297
 298                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 299                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 300                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 301                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 302
 303                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 304                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 305                                 /// @todo Possibly we should not uplink when the author is the forum itself?
 306
 307                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)
 308                                         && ($target_item['verb'] != Activity::ANNOUNCE)) {
 309                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $target_id);
 310                                 }
 311
 312                                 foreach ($items as $item) {
 313                                         $recipients[] = $item['contact-id'];
 314                                         // pull out additional tagged people to notify (if public message)
 315                                         if ($public_message && strlen($item['inform'])) {
 316                                                 $people = explode(',',$item['inform']);
 317                                                 foreach ($people as $person) {
 318                                                         if (substr($person,0,4) === 'cid:') {
 319                                                                 $recipients[] = intval(substr($person,4));
 320                                                         } else {
 321                                                                 $url_recipients[] = substr($person,4);
 322                                                         }
 323                                                 }
 324                                         }
 325                                 }
 326
 327                                 if (count($url_recipients)) {
 328                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 329                                 }
 330
 331                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 332                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 333                                 $recipients = array_diff($recipients, $deny);
 334
 335                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 336                                 if (
 337                                         function_exists('imap_open')
 338                                         && !DI::config()->get('system','imap_disabled')
 339                                         && $public_message
 340                                         && intval($target_item['pubmail'])
 341                                 ) {
 342                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 343                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 344                                                 $recipients[] = $mail_contact['id'];
 345                                         }
 346                                         DBA::close($mail_contacts_stmt);
 347                                 }
 348                         }
 349
 350                         // If the thread parent is OStatus then do some magic to distribute the messages.
 351                         // We have not only to look at the parent, since it could be a Friendica thread.
 352                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 353                                 $diaspora_delivery = false;
 354
 355                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 356
 357                                 // Send a salmon to the parent author
 358                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 359                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 360                                         Logger::notice('Notify parent author', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 361                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 362                                 }
 363
 364                                 // Send a salmon to the parent owner
 365                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 366                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 367                                         Logger::notice('Notify parent owner', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 368                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 369                                 }
 370
 371                                 // Send a salmon notification to every person we mentioned in the post
 372                                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION]) as $tag) {
 373                                         $probed_contact = Contact::getByURL($tag['url']);
 374                                         if (!empty($probed_contact['notify'])) {
 375                                                 Logger::notice('Notify mentioned user', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 376                                                 $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 377                                         }
 378                                 }
 379
 380                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 381                                 $networks = [Protocol::DFRN];
 382                         } elseif ($diaspora_delivery) {
 383                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 384                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 385                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 386                                         $networks[] = Protocol::ACTIVITYPUB;
 387                                 }
 388                         } else {
 389                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 390                         }
 391                 } else {
 392                         $public_message = false;
 393                 }
 394
 395                 if (empty($delivery_contacts_stmt)) {
 396                         if ($followup) {
 397                                 $recipients = $recipients_followup;
 398                         }
 399                         $condition = ['id' => $recipients, 'self' => false, 'uid' => [0, $uid],
 400                                 'blocked' => false, 'pending' => false, 'archive' => false];
 401                         if (!empty($networks)) {
 402                                 $condition['network'] = $networks;
 403                         }
 404                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 405                 }
 406
 407                 $conversants = [];
 408                 $batch_delivery = false;
 409
 410                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 411                         $relay_list = [];
 412
 413                         if ($diaspora_delivery && !$unlisted) {
 414                                 $batch_delivery = true;
 415
 416                                 $relay_list_stmt = DBA::p(
 417                                         "SELECT
 418                                                 `batch`, `network`, `protocol`,
 419                                                 ANY_VALUE(`id`) AS `id`,
 420                                                 ANY_VALUE(`url`) AS `url`,
 421                                                 ANY_VALUE(`name`) AS `name`
 422                                         FROM `contact`
 423                                         WHERE `network` = ?
 424                                         AND `batch` != ''
 425                                         AND `uid` = ?
 426                                         AND `rel` != ?
 427                                         AND NOT `blocked`
 428                                         AND NOT `pending`
 429                                         AND NOT `archive`
 430                                         GROUP BY `batch`, `network`, `protocol`",
 431                                         Protocol::DIASPORA,
 432                                         $owner['uid'],
 433                                         Contact::SHARING
 434                                 );
 435                                 $relay_list = DBA::toArray($relay_list_stmt);
 436
 437                                 // Fetch the participation list
 438                                 // The function will ensure that there are no duplicates
 439                                 $relay_list = Diaspora::participantsForThread($target_item, $relay_list);
 440
 441                                 // Add the relay to the list, avoid duplicates.
 442                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 443                                 if (!$followup && !Item::isForumPost($target_item, $owner) && !self::isForumPost($target_item)) {
 444                                         $relay_list = Relay::getList($target_id, $relay_list, [Protocol::DFRN, Protocol::DIASPORA]);
 445                                 }
 446                         }
 447
 448                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 449                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 450
 451                         $contacts = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 452
 453                         $conversants = array_merge($contacts, $relay_list);
 454
 455                         $delivery_queue_count += self::delivery($cmd, $target_id, $target_item, $thr_parent, $owner, $batch_delivery, true, $conversants, $ap_contacts, []);
 456
 457                         $push_notify = true;
 458                 }
 459
 460                 $contacts = DBA::toArray($delivery_contacts_stmt);
 461                 $delivery_queue_count += self::delivery($cmd, $target_id, $target_item, $thr_parent, $owner, $batch_delivery, false, $contacts, $ap_contacts, $conversants);
 462
 463                 $delivery_queue_count += self::deliverOStatus($target_id, $target_item, $owner, $url_recipients, $public_message, $push_notify);
 464
 465                 if (!empty($target_item)) {
 466                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 467
 468                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 469
 470                         Hook::callAll('notifier_end', $target_item);
 471
 472                         // Workaround for pure connector posts
 473                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 474                                 if ($delivery_queue_count == 0) {
 475                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 476                                         $delivery_queue_count = 1;
 477                                 }
 478
 479                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 480                         }
 481                 }
 482
 483                 return;
 484         }
 485
 486         /**
 487          * Deliver the message to the contacts
 488          *
 489          * @param string $cmd
 490          * @param int $target_id
 491          * @param array $target_item
 492          * @param array $thr_parent
 493          * @param array $owner
 494          * @param bool $batch_delivery
 495          * @param array $contacts
 496          * @param array $ap_contacts
 497          * @param array $conversants
 498          * @return int
 499          * @throws InternalServerErrorException
 500          * @throws Exception
 501          */
 502         private static function delivery(string $cmd, int $target_id, array $target_item, array $thr_parent, array $owner, bool $batch_delivery, bool $in_batch, array $contacts, array $ap_contacts, array $conversants = [])
 503         {
 504                 $a = DI::app();
 505                 $delivery_queue_count = 0;
 506
 507                 foreach ($contacts as $contact) {
 508                         // Ensure that local contacts are delivered via DFRN
 509                         if (Contact::isLocal($contact['url'])) {
 510                                 $contact['network'] = Protocol::DFRN;
 511                         }
 512
 513                         if (in_array($contact['id'], $ap_contacts)) {
 514                                 Logger::info('Contact is already delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'contact' => $contact['url']]);
 515                                 continue;
 516                         }
 517
 518                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 519                                 Logger::info('Contact is archived, so skip delivery', ['target' => $target_id, 'contact' => $contact['url']]);
 520                                 continue;
 521                         }
 522
 523                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 524                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $target_id, 'contact' => $contact['url']]);
 525                                 continue;
 526                         }
 527
 528                         if (self::skipActivityPubForDiaspora($contact, $target_item, $thr_parent)) {
 529                                 Logger::info('Contact is from Diaspora, but the replied author is from ActivityPub, so skip delivery via Diaspora', ['id' => $target_id, 'url' => $contact['url']]);
 530                                 continue;
 531                         }
 532
 533                         // Don't deliver to Diaspora if it already had been done as batch delivery
 534                         if (!$in_batch && $batch_delivery && ($contact['network'] == Protocol::DIASPORA)) {
 535                                 Logger::info('Diaspora contact is already delivered via batch', ['id' => $target_id, 'contact' => $contact]);
 536                                 continue;
 537                         }
 538
 539                         // Don't deliver to folks who have already been delivered to
 540                         if (in_array($contact['id'], $conversants)) {
 541                                 Logger::info('Already delivery', ['id' => $target_id, 'contact' => $contact]);
 542                                 continue;
 543                         }
 544
 545                         Logger::info('Delivery', ['batch' => $in_batch, 'target' => $target_id, 'guid' => $target_item['guid'] ?? '', 'to' => $contact]);
 546
 547                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 548                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 549                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 550                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 551                         if (($contact['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 552                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 553                         } else {
 554                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 555                         }
 556
 557                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id'])) {
 558                                 $delivery_queue_count++;
 559                         }
 560                 }
 561                 return $delivery_queue_count;
 562         }
 563
 564         /**
 565          * Deliver the message via OStatus
 566          *
 567          * @param int $target_id
 568          * @param array $target_item
 569          * @param array $owner
 570          * @param array $url_recipients
 571          * @param bool $public_message
 572          * @param bool $push_notify
 573          * @return int
 574          * @throws InternalServerErrorException
 575          * @throws Exception
 576          */
 577         private static function deliverOStatus(int $target_id, array $target_item, array $owner, array $url_recipients, bool $public_message, bool $push_notify)
 578         {
 579                 $a = DI::app();
 580                 $delivery_queue_count = 0;
 581
 582                 $url_recipients = array_filter($url_recipients);
 583                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 584                 // They are especially used for notifications to OStatus users that don't follow us.
 585                 if (!DI::config()->get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 586                         $slap = OStatus::salmon($target_item, $owner);
 587                         foreach ($url_recipients as $url) {
 588                                 Logger::info('Salmon delivery', ['item' => $target_id, 'to' => $url]);
 589
 590                                 $delivery_queue_count++;
 591                                 Salmon::slapper($owner, $url, $slap);
 592                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 593                         }
 594                 }
 595
 596                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 597                 if ($push_notify) {
 598                         Logger::info('Activating internal PuSH', ['item' => $target_id]);
 599
 600                         // Handling the pubsubhubbub requests
 601                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 602                 }
 603                 return $delivery_queue_count;
 604         }
 605
 606         /**
 607          * Checks if the current delivery shouldn't be transported to Diaspora.
 608          * This is done for posts from AP authors or posts that are comments to AP authors.
 609          *
 610          * @param array  $contact    Receiver of the post
 611          * @param array  $item       The post
 612          * @param array  $thr_parent The thread parent
 613          * @return bool
 614          */
 615         private static function skipActivityPubForDiaspora(array $contact, array $item, array $thr_parent)
 616         {
 617                 // No skipping needs to be done when delivery isn't done to Diaspora
 618                 if ($contact['network'] != Protocol::DIASPORA) {
 619                         return false;
 620                 }
 621
 622                 // Skip the delivery to Diaspora if the item is from an ActivityPub author
 623                 if (!empty($item['author-network']) && ($item['author-network'] == Protocol::ACTIVITYPUB)) {
 624                         return true;
 625                 }
 626
 627                 // Skip the delivery to Diaspora if the thread parent is from an ActivityPub author
 628                 if (!empty($thr_parent['author-network']) && ($thr_parent['author-network'] == Protocol::ACTIVITYPUB)) {
 629                         return true;
 630                 }
 631
 632                 return false;
 633         }
 634
 635         /**
 636          * Checks if the current action is a deletion command of a account removal activity
 637          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 638          * These protocols do have a dedicated command for deleting a whole account.
 639          *
 640          * @param string $cmd     Notifier command
 641          * @param array  $owner   Sender of the post
 642          * @param string $network Receiver network
 643          * @return bool
 644          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 645          * @throws \ImagickException
 646          */
 647         private static function isRemovalActivity($cmd, $owner, $network)
 648         {
 649                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 650         }
 651
 652         /**
 653          * @param int    $self_user_id
 654          * @param int    $priority The priority the Notifier queue item was created with
 655          * @param string $created  The date the Notifier queue item was created on
 656          * @return bool
 657          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 658          * @throws \ImagickException
 659          */
 660         private static function notifySelfRemoval($self_user_id, $priority, $created)
 661         {
 662                 $owner = User::getOwnerDataById($self_user_id);
 663                 if (!$owner) {
 664                         return false;
 665                 }
 666
 667                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 668                 if (!DBA::isResult($contacts_stmt)) {
 669                         return false;
 670                 }
 671
 672                 while($contact = DBA::fetch($contacts_stmt)) {
 673                         Contact::terminateFriendship($owner, $contact, true);
 674                 }
 675                 DBA::close($contacts_stmt);
 676
 677                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 678                 foreach ($inboxes as $inbox => $receivers) {
 679                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 680                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 681                                 'APDelivery', Delivery::REMOVAL, 0, $inbox, $self_user_id, $receivers);
 682                 }
 683
 684                 return true;
 685         }
 686
 687         /**
 688          * @param string $cmd
 689          * @param array  $target_item
 690          * @param array  $parent
 691          * @param array  $thr_parent
 692          * @param int    $priority The priority the Notifier queue item was created with
 693          * @param string $created  The date the Notifier queue item was created on
 694          * @return array 'count' => The number of delivery tasks created, 'contacts' => their contact ids
 695          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 696          * @throws \ImagickException
 697          */
 698         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 699         {
 700                 // Don't deliver via AP when the starting post isn't from a federated network
 701                 if (!in_array($parent['network'], Protocol::FEDERATED)) {
 702                         return ['count' => 0, 'contacts' => []];
 703                 }
 704
 705                 // Don't deliver via AP when the starting post is delivered via Diaspora
 706                 if ($parent['network'] == Protocol::DIASPORA) {
 707                         return ['count' => 0, 'contacts' => []];
 708                 }
 709
 710                 // Also don't deliver when the direct thread parent was delivered via Diaspora
 711                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 712                         return ['count' => 0, 'contacts' => []];
 713                 }
 714
 715                 // Posts from Diaspora contacts are transmitted via Diaspora
 716                 if ($target_item['network'] == Protocol::DIASPORA) {
 717                         return ['count' => 0, 'contacts' => []];
 718                 }
 719
 720                 $inboxes = [];
 721                 $relay_inboxes = [];
 722
 723                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 724
 725                 if ($target_item['origin']) {
 726                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 727
 728                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 729                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($target_item['id'], $inboxes);
 730                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes();
 731                         }
 732
 733                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 734                 } elseif (Item::isForumPost($target_item, $owner)) {
 735                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 736                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 737                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 738                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 739                         return ['count' => 0, 'contacts' => []];
 740                 } elseif ($parent['origin']) {
 741                         // Remote items are transmitted via the personal inboxes.
 742                         // Doing so ensures that the dedicated receiver will get the message.
 743                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 744
 745                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 746                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxesForItem($parent['id'], $inboxes);
 747                                 $relay_inboxes = ActivityPub\Transmitter::addRelayServerInboxes([]);
 748                         }
 749
 750                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 751                 }
 752
 753                 if (empty($inboxes) && empty($relay_inboxes)) {
 754                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 755                         return ['count' => 0, 'contacts' => []];
 756                 }
 757
 758                 // Fill the item cache
 759                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 760
 761                 $delivery_queue_count = 0;
 762                 $contacts = [];
 763
 764                 foreach ($inboxes as $inbox => $receivers) {
 765                         $contacts = array_merge($contacts, $receivers);
 766
 767                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 768
 769                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 770                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid, $receivers)) {
 771                                 $delivery_queue_count++;
 772                         }
 773                 }
 774
 775                 // We deliver posts to relay servers slightly delayed to priorize the direct delivery
 776                 foreach ($relay_inboxes as $inbox) {
 777                         Logger::info('Delivery to relay servers via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 778
 779                         if (Worker::add(['priority' => $priority, 'dont_fork' => true], 'APDelivery', $cmd, $target_item['id'], $inbox, $uid)) {
 780                                 $delivery_queue_count++;
 781                         }
 782                 }
 783
 784                 return ['count' => $delivery_queue_count, 'contacts' => $contacts];
 785         }
 786
 787         /**
 788          * Check if the delivered item is a forum post
 789          *
 790          * @param array $item
 791          * @return boolean
 792          */
 793         public static function isForumPost(array $item)
 794         {
 795                 return !empty($item['forum_mode']);
 796         }
 797 }