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\Network\Probe;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\Diaspora;
  42 use Friendica\Protocol\OStatus;
  43 use Friendica\Protocol\Salmon;
  44
  45 require_once 'include/items.php';
  46
  47 /*
  48  * The notifier is typically called with:
  49  *
  50  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  51  *
  52  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  53  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  54  */
  55
  56 class Notifier
  57 {
  58         public static function execute($cmd, $target_id)
  59         {
  60                 $a = DI::app();
  61
  62                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id]);
  63
  64                 $top_level = false;
  65                 $recipients = [];
  66                 $url_recipients = [];
  67
  68                 $delivery_contacts_stmt = null;
  69                 $target_item = [];
  70                 $parent = [];
  71                 $thr_parent = [];
  72                 $items = [];
  73                 $delivery_queue_count = 0;
  74
  75                 if ($cmd == Delivery::MAIL) {
  76                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  77                         if (!DBA::isResult($message)) {
  78                                 return;
  79                         }
  80                         $uid = $message['uid'];
  81                         $recipients[] = $message['contact-id'];
  82
  83                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  84                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  85                         foreach ($inboxes as $inbox) {
  86                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  87                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  88                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  89                         }
  90                 } elseif ($cmd == Delivery::SUGGESTION) {
  91                         $suggest = DI::fsuggest()->getById($target_id);
  92                         $uid = $suggest->uid;
  93                         $recipients[] = $suggest->cid;
  94                 } elseif ($cmd == Delivery::REMOVAL) {
  95                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  96                 } elseif ($cmd == Delivery::RELOCATION) {
  97                         $uid = $target_id;
  98
  99                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
 100                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'batch'], $condition);
 101                 } else {
 102                         // find ancestors
 103                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
 104                         $target_item = Item::selectFirst([], $condition);
 105
 106                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
 107                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
 108                                 return;
 109                         }
 110
 111                         if (!empty($target_item['contact-uid'])) {
 112                                 $uid = $target_item['contact-uid'];
 113                         } elseif (!empty($target_item['uid'])) {
 114                                 $uid = $target_item['uid'];
 115                         } else {
 116                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 117                                 return;
 118                         }
 119
 120                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 121                         $params = ['order' => ['id']];
 122                         $items_stmt = Item::select([], $condition, $params);
 123                         if (!DBA::isResult($items_stmt)) {
 124                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 125                                 return;
 126                         }
 127
 128                         $items = Item::inArray($items_stmt);
 129
 130                         // avoid race condition with deleting entries
 131                         if ($items[0]['deleted']) {
 132                                 foreach ($items as $item) {
 133                                         $item['deleted'] = 1;
 134                                 }
 135                         }
 136
 137                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 138                                 Logger::info('Top level post', ['target' => $target_id]);
 139                                 $top_level = true;
 140                         }
 141                 }
 142
 143                 $owner = User::getOwnerDataById($uid);
 144                 if (!$owner) {
 145                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 146                         return;
 147                 }
 148
 149                 // Should the post be transmitted to Diaspora?
 150                 $diaspora_delivery = true;
 151
 152                 // If this is a public conversation, notify the feed hub
 153                 $public_message = true;
 154
 155                 $unlisted = false;
 156
 157                 // Do a PuSH
 158                 $push_notify = false;
 159
 160                 // Deliver directly to a forum, don't PuSH
 161                 $direct_forum_delivery = false;
 162
 163                 $followup = false;
 164                 $recipients_followup = [];
 165
 166                 if (!empty($target_item) && !empty($items)) {
 167                         $parent = $items[0];
 168
 169                         $fields = ['network', 'author-id', 'author-link', 'owner-id'];
 170                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 171                         $thr_parent = Item::selectFirst($fields, $condition);
 172                         if (empty($thr_parent)) {
 173                                 $thr_parent = $parent;
 174                         }
 175
 176                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 177
 178                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 179                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['created'], $owner);
 180                         }
 181
 182                         // Only deliver threaded replies (comment to a comment) to Diaspora
 183                         // when the original comment author does support the Diaspora protocol.
 184                         if ($target_item['parent-uri'] != $target_item['thr-parent']) {
 185                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 186                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 187                         }
 188
 189                         $unlisted = $target_item['private'] == Item::UNLISTED;
 190
 191                         // This is IMPORTANT!!!!
 192
 193                         // We will only send a "notify owner to relay" or followup message if the referenced post
 194                         // originated on our system by virtue of having our hostname somewhere
 195                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 196
 197                         // if $parent['wall'] == 1 we will already have the parent message in our array
 198                         // and we will relay the whole lot.
 199
 200                         $localhost = str_replace('www.','', DI::baseUrl()->getHostname());
 201                         if (strpos($localhost,':')) {
 202                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 203                         }
 204                         /**
 205                          *
 206                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 207                          * have been known to cause runaway conditions which affected several servers, along with
 208                          * permissions issues.
 209                          *
 210                          */
 211
 212                         $relay_to_owner = false;
 213
 214                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 215                                 $relay_to_owner = true;
 216                         }
 217
 218                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 219                                 $relay_to_owner = true;
 220                         }
 221
 222                         // until the 'origin' flag has been in use for several months
 223                         // we will just use it as a fallback test
 224                         // later we will be able to use it as the primary test of whether or not to relay.
 225
 226                         if (!$target_item['origin']) {
 227                                 $relay_to_owner = false;
 228                         }
 229                         if ($parent['origin']) {
 230                                 $relay_to_owner = false;
 231                         }
 232
 233                         // Special treatment for forum posts
 234                         if (Item::isForumPost($target_item, $owner)) {
 235                                 $relay_to_owner = true;
 236                                 $direct_forum_delivery = true;
 237                         }
 238
 239                         // Avoid that comments in a forum thread are sent to OStatus
 240                         if (Item::isForumPost($parent, $owner)) {
 241                                 $direct_forum_delivery = true;
 242                         }
 243
 244                         if ($relay_to_owner) {
 245                                 // local followup to remote post
 246                                 $followup = true;
 247                                 $public_message = false; // not public
 248                                 $recipients = [$parent['contact-id']];
 249                                 $recipients_followup  = [$parent['contact-id']];
 250
 251                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 252
 253                                 if (($target_item['private'] != Item::PRIVATE) &&
 254                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 255                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 256                                         $push_notify = true;
 257
 258                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 259                                         $push_notify = true;
 260
 261                                         if ($parent["network"] == Protocol::OSTATUS) {
 262                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 263                                                 // Currently it is work at progress
 264                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 265                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 266                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 267                                                         $recipients_followup[] = $followup_contact['id'];
 268                                                 }
 269                                                 DBA::close($followup_contacts_stmt);
 270                                         }
 271                                 }
 272
 273                                 if ($direct_forum_delivery) {
 274                                         $push_notify = false;
 275                                 }
 276
 277                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 278                         } else {
 279                                 $followup = false;
 280
 281                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 282
 283                                 // don't send deletions onward for other people's stuff
 284
 285                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 286                                         Logger::log('Ignoring delete notification for non-wall item');
 287                                         return;
 288                                 }
 289
 290                                 if (strlen($parent['allow_cid'])
 291                                         || strlen($parent['allow_gid'])
 292                                         || strlen($parent['deny_cid'])
 293                                         || strlen($parent['deny_gid'])) {
 294                                         $public_message = false; // private recipients, not public
 295                                 }
 296
 297                                 $aclFormatter = DI::aclFormatter();
 298
 299                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 300                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 301                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 302                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 303
 304                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 305                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 306
 307                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)) {
 308                                         Worker::add($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($probed_contact["notify"])) {
 359                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$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($probed_contact["notify"])) {
 366                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$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                                         $probed_contact = Probe::uri($tag['url']);
 373                                         if ($probed_contact["notify"] != "") {
 374                                                 Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$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' => $recipients, 'self' => false,
 399                                 'blocked' => false, 'pending' => false, 'archive' => false];
 400                         if (!empty($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                                 $relay_list = Diaspora::participantsForThread($parent, $relay_list);
 441
 442                                 // Add the relay to the list, avoid duplicates.
 443                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 444                                 if (!$followup && !Item::isForumPost($target_item, $owner)) {
 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', ['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', ['target' => $target_id, 'contact' => $rr['url']]);
 470                                                 continue;
 471                                         }
 472
 473                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 474                                                 Logger::log('Skipping dropping for ' . $rr['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 475                                                 continue;
 476                                         }
 477
 478                                         if (self::skipDFRN($rr, $target_item, $parent, $thr_parent, $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                                         $conversants[] = $rr['id'];
 484
 485                                         Logger::info('Public delivery', ['target' => $target_id, 'guid' => $target_item["guid"], 'to' => $rr]);
 486
 487                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 488                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 489                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 490                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 491                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 492                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 493                                         } else {
 494                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 495                                         }
 496
 497                                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id'])) {
 498                                                 $delivery_queue_count++;
 499                                         }
 500                                 }
 501                         }
 502
 503                         $push_notify = true;
 504                 }
 505
 506                 // delivery loop
 507                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 508                         // Ensure that local contacts are delivered via DFRN
 509                         if (Contact::isLocal($contact['url'])) {
 510                                 $contact['network'] = Protocol::DFRN;
 511                         }
 512
 513                         if (!empty($contact['addr']) && ($contact['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $contact['addr']])) {
 514                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $contact['url']]);
 515                                 continue;
 516                         }
 517
 518                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 519                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $contact['url']]);
 520                                 continue;
 521                         }
 522
 523                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 524                                 Logger::log('Skipping dropping for ' . $contact['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 525                                 continue;
 526                         }
 527
 528                         if (self::skipDFRN($contact, $target_item, $parent, $thr_parent, $cmd)) {
 529                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'url' => $contact['url']]);
 530                                 continue;
 531                         }
 532
 533                         // Don't deliver to Diaspora if it already had been done as batch delivery
 534                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 535                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 536                                 continue;
 537                         }
 538
 539                         // Don't deliver to folks who have already been delivered to
 540                         if (in_array($contact['id'], $conversants)) {
 541                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 542                                 continue;
 543                         }
 544
 545                         Logger::info('Delivery', ['id' => $target_id, 'to' => $contact]);
 546
 547                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 548                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 549                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 550                         if ($contact['network'] == Protocol::DIASPORA) {
 551                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 552                         } else {
 553                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 554                         }
 555
 556                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id'])) {
 557                                 $delivery_queue_count++;
 558                         }
 559                 }
 560                 DBA::close($delivery_contacts_stmt);
 561
 562                 $url_recipients = array_filter($url_recipients);
 563                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 564                 // They are especially used for notifications to OStatus users that don't follow us.
 565                 if (!DI::config()->get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 566                         $slap = OStatus::salmon($target_item, $owner);
 567                         foreach ($url_recipients as $url) {
 568                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 569                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 570                                 $delivery_queue_count++;
 571                                 Salmon::slapper($owner, $url, $slap);
 572                                 Post\DeliveryData::incrementQueueDone($target_item['uri-id'], Post\DeliveryData::OSTATUS);
 573                         }
 574                 }
 575
 576                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 577                 if ($push_notify) {
 578                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 579
 580                         // Handling the pubsubhubbub requests
 581                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 582                 }
 583
 584                 if (!empty($target_item)) {
 585                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 586
 587                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 588
 589                         Hook::callAll('notifier_end', $target_item);
 590
 591                         // Workaround for pure connector posts
 592                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 593                                 if ($delivery_queue_count == 0) {
 594                                         Post\DeliveryData::incrementQueueDone($target_item['uri-id']);
 595                                         $delivery_queue_count = 1;
 596                                 }
 597
 598                                 Post\DeliveryData::incrementQueueCount($target_item['uri-id'], $delivery_queue_count);
 599                         }
 600                 }
 601
 602                 return;
 603         }
 604
 605         /**
 606          * Checks if the current delivery process needs to be transported via DFRN.
 607          *
 608          * @param array  $contact    Receiver of the post
 609          * @param array  $item       The post
 610          * @param array  $parent     The parent
 611          * @param array  $thr_parent The thread parent
 612          * @param string $cmd        Notifier command
 613          * @return bool
 614          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 615          * @throws \ImagickException
 616          */
 617         private static function skipDFRN($contact, $item, $parent, $thr_parent, $cmd)
 618         {
 619                 if (empty($parent['network'])) {
 620                         return false;
 621                 }
 622
 623                 // Don't skip when the starting post is delivered via Diaspora
 624                 if ($parent['network'] == Protocol::DIASPORA) {
 625                         return false;
 626                 }
 627
 628                 // Also don't skip when the direct thread parent was delivered via Diaspora
 629                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 630                         return false;
 631                 }
 632
 633                 // Use DFRN if we are on the same site
 634                 if (!empty($contact['url']) && Contact::isLocal($contact['url'])) {
 635                         return false;
 636                 }
 637
 638                 // Don't skip when author or owner don't have AP profiles
 639                 if ((!empty($item['author-link']) && empty(APContact::getByURL($item['author-link'], false))) || (!empty($item['owner-link']) && empty(APContact::getByURL($item['owner-link'], false)))) {
 640                         return false;
 641                 }
 642
 643                 // Don't skip DFRN delivery for these commands
 644                 if (in_array($cmd, [Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION, Delivery::POKE])) {
 645                         return false;
 646                 }
 647
 648                 // We deliver reshares via AP whenever possible
 649                 if (ActivityPub\Transmitter::isAnnounce($item)) {
 650                         return true;
 651                 }
 652
 653                 // Skip DFRN when the item will be (forcefully) delivered via AP
 654                 if (DI::config()->get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 655                         return true;
 656                 }
 657
 658                 // Skip DFRN delivery if the contact speaks ActivityPub
 659                 return in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && ($contact['protocol'] == Protocol::ACTIVITYPUB);
 660         }
 661
 662         /**
 663          * Checks if the current action is a deletion command of a account removal activity
 664          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 665          * These protocols do have a dedicated command for deleting a whole account.
 666          *
 667          * @param string $cmd     Notifier command
 668          * @param array  $owner   Sender of the post
 669          * @param string $network Receiver network
 670          * @return bool
 671          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 672          * @throws \ImagickException
 673          */
 674         private static function isRemovalActivity($cmd, $owner, $network)
 675         {
 676                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 677         }
 678
 679         /**
 680          * @param int    $self_user_id
 681          * @param int    $priority The priority the Notifier queue item was created with
 682          * @param string $created  The date the Notifier queue item was created on
 683          * @return bool
 684          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 685          * @throws \ImagickException
 686          */
 687         private static function notifySelfRemoval($self_user_id, $priority, $created)
 688         {
 689                 $owner = User::getOwnerDataById($self_user_id);
 690                 if (!$owner) {
 691                         return false;
 692                 }
 693
 694                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 695                 if (!DBA::isResult($contacts_stmt)) {
 696                         return false;
 697                 }
 698
 699                 while($contact = DBA::fetch($contacts_stmt)) {
 700                         Contact::terminateFriendship($owner, $contact, true);
 701                 }
 702                 DBA::close($contacts_stmt);
 703
 704                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 705                 foreach ($inboxes as $inbox) {
 706                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 707                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 708                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 709                 }
 710
 711                 return true;
 712         }
 713
 714         /**
 715          * @param string $cmd
 716          * @param array  $target_item
 717          * @param array  $parent
 718          * @param array  $thr_parent
 719          * @param int    $priority The priority the Notifier queue item was created with
 720          * @param string $created  The date the Notifier queue item was created on
 721          * @return int The number of delivery tasks created
 722          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 723          * @throws \ImagickException
 724          */
 725         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 726         {
 727                 // Don't deliver via AP when the starting post is delivered via Diaspora
 728                 if ($parent['network'] == Protocol::DIASPORA) {
 729                         return 0;
 730                 }
 731
 732                 // Also don't deliver  when the direct thread parent was delivered via Diaspora
 733                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 734                         return 0;
 735                 }
 736
 737                 $inboxes = [];
 738
 739                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 740
 741                 if ($target_item['origin']) {
 742                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 743                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 744                 } elseif (Item::isForumPost($target_item, $owner)) {
 745                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 746                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 747                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 748                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 749                         return 0;
 750                 } elseif ($parent['origin']) {
 751                         // Remote items are transmitted via the personal inboxes.
 752                         // Doing so ensures that the dedicated receiver will get the message.
 753                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 754                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 755                 }
 756
 757                 if (empty($inboxes)) {
 758                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 759                         return 0;
 760                 }
 761
 762                 // Fill the item cache
 763                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 764
 765                 $delivery_queue_count = 0;
 766
 767                 foreach ($inboxes as $inbox) {
 768                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 769
 770                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 771                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid)) {
 772                                 $delivery_queue_count++;
 773                         }
 774                 }
 775
 776                 return $delivery_queue_count;
 777         }
 778 }