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