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\APContact;
  31 use Friendica\Model\Contact;
  32 use Friendica\Model\Conversation;
  33 use Friendica\Model\Group;
  34 use Friendica\Model\Item;
  35 use Friendica\Model\Post;
  36 use Friendica\Model\PushSubscriber;
  37 use Friendica\Model\Tag;
  38 use Friendica\Model\User;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\Diaspora;
  42 use Friendica\Protocol\OStatus;
  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                 $delivery_queue_count = 0;
  72
  73                 if ($cmd == Delivery::MAIL) {
  74                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  75                         if (!DBA::isResult($message)) {
  76                                 return;
  77                         }
  78                         $uid = $message['uid'];
  79                         $recipients[] = $message['contact-id'];
  80
  81                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  82                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  83                         foreach ($inboxes as $inbox) {
  84                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  85                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  86                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  87                         }
  88                 } elseif ($cmd == Delivery::SUGGESTION) {
  89                         $suggest = DI::fsuggest()->getById($target_id);
  90                         $uid = $suggest->uid;
  91                         $recipients[] = $suggest->cid;
  92                 } elseif ($cmd == Delivery::REMOVAL) {
  93                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  94                 } elseif ($cmd == Delivery::RELOCATION) {
  95                         $uid = $target_id;
  96
  97                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
  98                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'batch'], $condition);
  99                 } else {
 100                         // find ancestors
 101                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
 102                         $target_item = Item::selectFirst([], $condition);
 103
 104                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 105                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
 106                                 return;
 107                         }
 108
 109                         if (!empty($target_item['contact-uid'])) {
 110                                 $uid = $target_item['contact-uid'];
 111                         } elseif (!empty($target_item['uid'])) {
 112                                 $uid = $target_item['uid'];
 113                         } else {
 114                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 115                                 return;
 116                         }
 117
 118                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 119                         $params = ['order' => ['id']];
 120                         $items_stmt = Item::select([], $condition, $params);
 121                         if (!DBA::isResult($items_stmt)) {
 122                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 123                                 return;
 124                         }
 125
 126                         $items = Item::inArray($items_stmt);
 127
 128                         // avoid race condition with deleting entries
 129                         if ($items[0]['deleted']) {
 130                                 foreach ($items as $item) {
 131                                         $item['deleted'] = 1;
 132                                 }
 133                         }
 134
 135                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 136                                 Logger::info('Top level post', ['target' => $target_id]);
 137                                 $top_level = true;
 138                         }
 139                 }
 140
 141                 $owner = User::getOwnerDataById($uid);
 142                 if (!$owner) {
 143                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 144                         return;
 145                 }
 146
 147                 // Should the post be transmitted to Diaspora?
 148                 $diaspora_delivery = true;
 149
 150                 // If this is a public conversation, notify the feed hub
 151                 $public_message = true;
 152
 153                 $unlisted = false;
 154
 155                 // Do a PuSH
 156                 $push_notify = false;
 157
 158                 // Deliver directly to a forum, don't PuSH
 159                 $direct_forum_delivery = false;
 160
 161                 $followup = false;
 162                 $recipients_followup = [];
 163
 164                 if (!empty($target_item) && !empty($items)) {
 165                         $parent = $items[0];
 166
 167                         $fields = ['network', 'author-id', 'author-link', 'author-network', 'owner-id'];
 168                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 169                         $thr_parent = Item::selectFirst($fields, $condition);
 170                         if (empty($thr_parent)) {
 171                                 $thr_parent = $parent;
 172                         }
 173
 174                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 175
 176                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 177                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['created'], $owner);
 178                         }
 179
 180                         // Only deliver threaded replies (comment to a comment) to Diaspora
 181                         // when the original comment author does support the Diaspora protocol.
 182                         if ($target_item['parent-uri'] != $target_item['thr-parent']) {
 183                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 184                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 185                         }
 186
 187                         $unlisted = $target_item['private'] == Item::UNLISTED;
 188
 189                         // This is IMPORTANT!!!!
 190
 191                         // We will only send a "notify owner to relay" or followup message if the referenced post
 192                         // originated on our system by virtue of having our hostname somewhere
 193                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 194
 195                         // if $parent['wall'] == 1 we will already have the parent message in our array
 196                         // and we will relay the whole lot.
 197
 198                         $localhost = str_replace('www.','', DI::baseUrl()->getHostname());
 199                         if (strpos($localhost,':')) {
 200                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 201                         }
 202                         /**
 203                          *
 204                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 205                          * have been known to cause runaway conditions which affected several servers, along with
 206                          * permissions issues.
 207                          *
 208                          */
 209
 210                         $relay_to_owner = false;
 211
 212                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 213                                 $relay_to_owner = true;
 214                         }
 215
 216                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 217                                 $relay_to_owner = true;
 218                         }
 219
 220                         // until the 'origin' flag has been in use for several months
 221                         // we will just use it as a fallback test
 222                         // later we will be able to use it as the primary test of whether or not to relay.
 223
 224                         if (!$target_item['origin']) {
 225                                 $relay_to_owner = false;
 226                         }
 227                         if ($parent['origin']) {
 228                                 $relay_to_owner = false;
 229                         }
 230
 231                         // Special treatment for forum posts
 232                         if (Item::isForumPost($target_item, $owner)) {
 233                                 $relay_to_owner = true;
 234                                 $direct_forum_delivery = true;
 235                         }
 236
 237                         // Avoid that comments in a forum thread are sent to OStatus
 238                         if (Item::isForumPost($parent, $owner)) {
 239                                 $direct_forum_delivery = true;
 240                         }
 241
 242                         if ($relay_to_owner) {
 243                                 // local followup to remote post
 244                                 $followup = true;
 245                                 $public_message = false; // not public
 246                                 $recipients = [$parent['contact-id']];
 247                                 $recipients_followup  = [$parent['contact-id']];
 248
 249                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 250
 251                                 if (($target_item['private'] != Item::PRIVATE) &&
 252                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 253                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 254                                         $push_notify = true;
 255
 256                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 257                                         $push_notify = true;
 258
 259                                         if ($parent["network"] == Protocol::OSTATUS) {
 260                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 261                                                 // Currently it is work at progress
 262                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 263                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 264                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 265                                                         $recipients_followup[] = $followup_contact['id'];
 266                                                 }
 267                                                 DBA::close($followup_contacts_stmt);
 268                                         }
 269                                 }
 270
 271                                 if ($direct_forum_delivery) {
 272                                         $push_notify = false;
 273                                 }
 274
 275                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 276                         } else {
 277                                 $followup = false;
 278
 279                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 280
 281                                 // don't send deletions onward for other people's stuff
 282
 283                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 284                                         Logger::log('Ignoring delete notification for non-wall item');
 285                                         return;
 286                                 }
 287
 288                                 if (strlen($parent['allow_cid'])
 289                                         || strlen($parent['allow_gid'])
 290                                         || strlen($parent['deny_cid'])
 291                                         || strlen($parent['deny_gid'])) {
 292                                         $public_message = false; // private recipients, not public
 293                                 }
 294
 295                                 $aclFormatter = DI::aclFormatter();
 296
 297                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 298                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 299                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 300                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 301
 302                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 303                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 304                                 /// @todo Possibly we should not uplink when the author is the forum itself?
 305
 306                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)
 307                                         && ($target_item['verb'] != Activity::ANNOUNCE)) {
 308                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $target_id);
 309                                 }
 310
 311                                 foreach ($items as $item) {
 312                                         $recipients[] = $item['contact-id'];
 313                                         // pull out additional tagged people to notify (if public message)
 314                                         if ($public_message && strlen($item['inform'])) {
 315                                                 $people = explode(',',$item['inform']);
 316                                                 foreach ($people as $person) {
 317                                                         if (substr($person,0,4) === 'cid:') {
 318                                                                 $recipients[] = intval(substr($person,4));
 319                                                         } else {
 320                                                                 $url_recipients[] = substr($person,4);
 321                                                         }
 322                                                 }
 323                                         }
 324                                 }
 325
 326                                 if (count($url_recipients)) {
 327                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 328                                 }
 329
 330                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 331                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 332                                 $recipients = array_diff($recipients, $deny);
 333
 334                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 335                                 if (
 336                                         function_exists('imap_open')
 337                                         && !DI::config()->get('system','imap_disabled')
 338                                         && $public_message
 339                                         && intval($target_item['pubmail'])
 340                                 ) {
 341                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 342                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 343                                                 $recipients[] = $mail_contact['id'];
 344                                         }
 345                                         DBA::close($mail_contacts_stmt);
 346                                 }
 347                         }
 348
 349                         // If the thread parent is OStatus then do some magic to distribute the messages.
 350                         // We have not only to look at the parent, since it could be a Friendica thread.
 351                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 352                                 $diaspora_delivery = false;
 353
 354                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 355
 356                                 // Send a salmon to the parent author
 357                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 358                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 359                                         Logger::notice('Notify parent author', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 360                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 361                                 }
 362
 363                                 // Send a salmon to the parent owner
 364                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 365                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 366                                         Logger::notice('Notify parent owner', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 367                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 368                                 }
 369
 370                                 // Send a salmon notification to every person we mentioned in the post
 371                                 foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION]) as $tag) {
 372                                         $probed_contact = Contact::getByURL($tag['url']);
 373                                         if (!empty($probed_contact['notify'])) {
 374                                                 Logger::notice('Notify mentioned user', ['url' => $probed_contact["url"], 'notify' => $probed_contact["notify"]]);
 375                                                 $url_recipients[$probed_contact['notify']] = $probed_contact['notify'];
 376                                         }
 377                                 }
 378
 379                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 380                                 $networks = [Protocol::DFRN];
 381                         } elseif ($diaspora_delivery) {
 382                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 383                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 384                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 385                                         $networks[] = Protocol::ACTIVITYPUB;
 386                                 }
 387                         } else {
 388                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 389                         }
 390                 } else {
 391                         $public_message = false;
 392                 }
 393
 394                 if (empty($delivery_contacts_stmt)) {
 395                         if ($followup) {
 396                                 $recipients = $recipients_followup;
 397                         }
 398                         $condition = ['id' => $recipients, 'self' => false, 'uid' => [0, $uid],
 399                                 'blocked' => false, 'pending' => false, 'archive' => false];
 400                         if (!empty($networks)) {
 401                                 $condition['network'] = $networks;
 402                         }
 403                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 404                 }
 405
 406                 $conversants = [];
 407                 $batch_delivery = false;
 408
 409                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 410                         $relay_list = [];
 411
 412                         if ($diaspora_delivery && !$unlisted) {
 413                                 $batch_delivery = true;
 414
 415                                 $relay_list_stmt = DBA::p(
 416                                         "SELECT
 417                                                 `batch`,
 418                                                 ANY_VALUE(`id`) AS `id`,
 419                                                 ANY_VALUE(`url`) AS `url`,
 420                                                 ANY_VALUE(`name`) AS `name`,
 421                                                 ANY_VALUE(`network`) AS `network`,
 422                                                 ANY_VALUE(`protocol`) AS `protocol`
 423                                         FROM `contact`
 424                                         WHERE `network` = ?
 425                                         AND `batch` != ''
 426                                         AND `uid` = ?
 427                                         AND `rel` != ?
 428                                         AND NOT `blocked`
 429                                         AND NOT `pending`
 430                                         AND NOT `archive`
 431                                         GROUP BY `batch`",
 432                                         Protocol::DIASPORA,
 433                                         $owner['uid'],
 434                                         Contact::SHARING
 435                                 );
 436                                 $relay_list = DBA::toArray($relay_list_stmt);
 437
 438                                 // Fetch the participation list
 439                                 // The function will ensure that there are no duplicates
 440                                 $relay_list = Diaspora::participantsForThread($target_item, $relay_list);
 441
 442                                 // Add the relay to the list, avoid duplicates.
 443                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 444                                 if (!$followup && !Item::isForumPost($target_item, $owner) && !self::isForumPost($target_item)) {
 445                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 446                                 }
 447                         }
 448
 449                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 450                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 451
 452                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 453
 454                         $r = array_merge($r2, $relay_list);
 455
 456                         if (DBA::isResult($r)) {
 457                                 foreach ($r as $rr) {
 458                                         // Ensure that local contacts are delivered via DFRN
 459                                         if (Contact::isLocal($rr['url'])) {
 460                                                 $contact['network'] = Protocol::DFRN;
 461                                         }
 462
 463                                         if (!empty($rr['addr']) && ($rr['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $rr['addr']])) {
 464                                                 Logger::info('Contact is AP omly, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'contact' => $rr['url']]);
 465                                                 continue;
 466                                         }
 467
 468                                         if (!empty($rr['id']) && Contact::isArchived($rr['id'])) {
 469                                                 Logger::info('Contact is archived, so skip delivery', ['target' => $target_id, 'contact' => $rr['url']]);
 470                                                 continue;
 471                                         }
 472
 473                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 474                                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $target_id, 'contact' => $rr['url']]);
 475                                                 continue;
 476                                         }
 477
 478                                         if (self::skipDFRN($rr, $target_item, $parent, $thr_parent, $owner, $cmd)) {
 479                                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['id' => $target_id, 'url' => $rr['url']]);
 480                                                 continue;
 481                                         }
 482
 483                                         if (self::skipActivityPubForDiaspora($rr, $target_item, $thr_parent)) {
 484                                                 Logger::info('Contact is from Diaspora, but the replied author is from ActivityPub, so skip delivery via Diaspora', ['id' => $target_id, 'url' => $rr['url']]);
 485                                                 continue;
 486                                         }
 487
 488                                         $conversants[] = $rr['id'];
 489
 490                                         Logger::info('Public delivery', ['target' => $target_id, 'guid' => $target_item["guid"], 'to' => $rr]);
 491
 492                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 493                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 494                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 495                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 496                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 497                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 498                                         } else {
 499                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 500                                         }
 501
 502                                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id'])) {
 503                                                 $delivery_queue_count++;
 504                                         }
 505                                 }
 506                         }
 507
 508                         $push_notify = true;
 509                 }
 510
 511                 // delivery loop
 512                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 513                         // Ensure that local contacts are delivered via DFRN
 514                         if (Contact::isLocal($contact['url'])) {
 515                                 $contact['network'] = Protocol::DFRN;
 516                         }
 517
 518                         if (!empty($contact['addr']) && ($contact['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $contact['addr']])) {
 519                                 Logger::info('Contact is AP omly, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'contact' => $contact['url']]);
 520                                 continue;
 521                         }
 522
 523                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 524                                 Logger::info('Contact is archived, so skip delivery', ['target' => $target_id, 'contact' => $contact['url']]);
 525                                 continue;
 526                         }
 527
 528                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 529                                 Logger::info('Contact does no supports account removal commands, so skip delivery', ['target' => $target_id, 'contact' => $contact['url']]);
 530                                 continue;
 531                         }
 532
 533                         if (self::skipDFRN($contact, $target_item, $parent, $thr_parent, $owner, $cmd)) {
 534                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'url' => $contact['url']]);
 535                                 continue;
 536                         }
 537
 538                         if (self::skipActivityPubForDiaspora($contact, $target_item, $thr_parent)) {
 539                                 Logger::info('Contact is from Diaspora, but the replied author is from ActivityPub, so skip delivery via Diaspora', ['id' => $target_id, 'url' => $contact['url']]);
 540                                 continue;
 541                         }
 542
 543                         // Don't deliver to Diaspora if it already had been done as batch delivery
 544                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 545                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 546                                 continue;
 547                         }
 548
 549                         // Don't deliver to folks who have already been delivered to
 550                         if (in_array($contact['id'], $conversants)) {
 551                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 552                                 continue;
 553                         }
 554
 555                         Logger::info('Delivery', ['id' => $target_id, 'to' => $contact]);
 556
 557                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 558                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 559                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 560                         if ($contact['network'] == Protocol::DIASPORA) {
 561                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 562                         } else {
 563                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 564                         }
 565
 566                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id'])) {
 567                                 $delivery_queue_count++;
 568                         }
 569                 }
 570                 DBA::close($delivery_contacts_stmt);
 571
 572                 $url_recipients = array_filter($url_recipients);
 573                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 574                 // They are especially used for notifications to OStatus users that don't follow us.
 575                 if (!DI::config()->get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 576                         $slap = OStatus::salmon($target_item, $owner);
 577                         foreach ($url_recipients as $url) {
 578                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 579                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 580                                 $delivery_queue_count++;
 581                                 Salmon::slapper($owner, $url, $slap);
 582                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 583                         }
 584                 }
 585
 586                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 587                 if ($push_notify) {
 588                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 589
 590                         // Handling the pubsubhubbub requests
 591                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 592                 }
 593
 594                 if (!empty($target_item)) {
 595                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 596
 597                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 598
 599                         Hook::callAll('notifier_end', $target_item);
 600
 601                         // Workaround for pure connector posts
 602                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 603                                 if ($delivery_queue_count == 0) {
 604                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 605                                         $delivery_queue_count = 1;
 606                                 }
 607
 608                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 609                         }
 610                 }
 611
 612                 return;
 613         }
 614
 615         /**
 616          * Checks if the current delivery shouldn't be transported to Diaspora.
 617          * This is done for posts from AP authors or posts that are comments to AP authors.
 618          *
 619          * @param array  $contact    Receiver of the post
 620          * @param array  $item       The post
 621          * @param array  $thr_parent The thread parent
 622          * @return bool
 623          */
 624         private static function skipActivityPubForDiaspora(array $contact, array $item, array $thr_parent)
 625         {
 626                 // No skipping needs to be done when delivery isn't done to Diaspora
 627                 if ($contact['network'] != Protocol::DIASPORA) {
 628                         return false;
 629                 }
 630
 631                 // Skip the delivery to Diaspora if the item is from an ActivityPub author
 632                 if ($item['author-network'] == Protocol::ACTIVITYPUB) {
 633                         return true;
 634                 }
 635
 636                 // Skip the delivery to Diaspora if the thread parent is from an ActivityPub author
 637                 if ($thr_parent['author-network'] == Protocol::ACTIVITYPUB) {
 638                         return true;
 639                 }
 640
 641                 return false;
 642         }
 643
 644         /**
 645          * Checks if the current delivery process needs to be transported via DFRN.
 646          *
 647          * @param array  $contact    Receiver of the post
 648          * @param array  $item       The post
 649          * @param array  $parent     The parent
 650          * @param array  $thr_parent The thread parent
 651          * @param array  $owner      Owner array
 652          * @param string $cmd        Notifier command
 653          * @return bool
 654          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 655          * @throws \ImagickException
 656          */
 657         private static function skipDFRN($contact, $item, $parent, $thr_parent, $owner, $cmd)
 658         {
 659                 if (empty($parent['network'])) {
 660                         return false;
 661                 }
 662
 663                 // Don't skip when the starting post is delivered via Diaspora
 664                 if ($parent['network'] == Protocol::DIASPORA) {
 665                         return false;
 666                 }
 667
 668                 // Also don't skip when the direct thread parent was delivered via Diaspora
 669                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 670                         return false;
 671                 }
 672
 673                 // Use DFRN if we are on the same site
 674                 if (!empty($contact['url']) && Contact::isLocal($contact['url'])) {
 675                         return false;
 676                 }
 677
 678                 // Don't skip when author or owner don't have AP profiles
 679                 if ((!empty($item['author-link']) && empty(APContact::getByURL($item['author-link'], false))) || (!empty($item['owner-link']) && empty(APContact::getByURL($item['owner-link'], false)))) {
 680                         return false;
 681                 }
 682
 683                 // Don't skip DFRN delivery for these commands
 684                 if (in_array($cmd, [Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION, Delivery::POKE])) {
 685                         return false;
 686                 }
 687
 688                 // We deliver reshares via AP whenever possible
 689                 if (ActivityPub\Transmitter::isAnnounce($item)) {
 690                         return true;
 691                 }
 692
 693                 // For the time being we always deliver forum post via DFRN if possible
 694                 // This can be removed possible at the end of 2020 when hopefully most system can process AP forum posts
 695                 if ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
 696                         return false;
 697                 }
 698
 699                 // Skip DFRN when the item will be (forcefully) delivered via AP
 700                 if (DI::config()->get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 701                         return true;
 702                 }
 703
 704                 // Skip DFRN delivery if the contact speaks ActivityPub
 705                 return in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && ($contact['protocol'] == Protocol::ACTIVITYPUB);
 706         }
 707
 708         /**
 709          * Checks if the current action is a deletion command of a account removal activity
 710          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 711          * These protocols do have a dedicated command for deleting a whole account.
 712          *
 713          * @param string $cmd     Notifier command
 714          * @param array  $owner   Sender of the post
 715          * @param string $network Receiver network
 716          * @return bool
 717          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 718          * @throws \ImagickException
 719          */
 720         private static function isRemovalActivity($cmd, $owner, $network)
 721         {
 722                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 723         }
 724
 725         /**
 726          * @param int    $self_user_id
 727          * @param int    $priority The priority the Notifier queue item was created with
 728          * @param string $created  The date the Notifier queue item was created on
 729          * @return bool
 730          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 731          * @throws \ImagickException
 732          */
 733         private static function notifySelfRemoval($self_user_id, $priority, $created)
 734         {
 735                 $owner = User::getOwnerDataById($self_user_id);
 736                 if (!$owner) {
 737                         return false;
 738                 }
 739
 740                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 741                 if (!DBA::isResult($contacts_stmt)) {
 742                         return false;
 743                 }
 744
 745                 while($contact = DBA::fetch($contacts_stmt)) {
 746                         Contact::terminateFriendship($owner, $contact, true);
 747                 }
 748                 DBA::close($contacts_stmt);
 749
 750                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 751                 foreach ($inboxes as $inbox) {
 752                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 753                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 754                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 755                 }
 756
 757                 return true;
 758         }
 759
 760         /**
 761          * @param string $cmd
 762          * @param array  $target_item
 763          * @param array  $parent
 764          * @param array  $thr_parent
 765          * @param int    $priority The priority the Notifier queue item was created with
 766          * @param string $created  The date the Notifier queue item was created on
 767          * @return int The number of delivery tasks created
 768          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 769          * @throws \ImagickException
 770          */
 771         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 772         {
 773                 // Don't deliver via AP when the starting post is delivered via Diaspora
 774                 if ($parent['network'] == Protocol::DIASPORA) {
 775                         return 0;
 776                 }
 777
 778                 // Also don't deliver  when the direct thread parent was delivered via Diaspora
 779                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 780                         return 0;
 781                 }
 782
 783                 $inboxes = [];
 784
 785                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 786
 787                 if ($target_item['origin']) {
 788                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 789
 790                         if (in_array($target_item['private'], [Item::PUBLIC])) {
 791                                 $inboxes = ActivityPub\Transmitter::addRelayServerInboxes($inboxes);
 792                         }
 793
 794                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 795                 } elseif (Item::isForumPost($target_item, $owner)) {
 796                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 797                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 798                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 799                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 800                         return 0;
 801                 } elseif ($parent['origin']) {
 802                         // Remote items are transmitted via the personal inboxes.
 803                         // Doing so ensures that the dedicated receiver will get the message.
 804                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 805                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 806                 }
 807
 808                 if (empty($inboxes)) {
 809                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 810                         return 0;
 811                 }
 812
 813                 // Fill the item cache
 814                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 815
 816                 $delivery_queue_count = 0;
 817
 818                 foreach ($inboxes as $inbox) {
 819                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 820
 821                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 822                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid)) {
 823                                 $delivery_queue_count++;
 824                         }
 825                 }
 826
 827                 return $delivery_queue_count;
 828         }
 829
 830         /**
 831          * Check if the delivered item is a forum post
 832          *
 833          * @param array $item
 834          * @return boolean
 835          */
 836         public static function isForumPost(array $item)
 837         {
 838                 return !empty($item['forum_mode']);
 839         }
 840 }