src/Worker/Notifier.php

   1 <?php
   2 /**
   3  * @file src/Worker/Notifier.php
   4  */
   5 namespace Friendica\Worker;
   6
   7 use Friendica\BaseObject;
   8 use Friendica\Core\Config;
   9 use Friendica\Core\Hook;
  10 use Friendica\Core\Logger;
  11 use Friendica\Core\Protocol;
  12 use Friendica\Core\Worker;
  13 use Friendica\Database\DBA;
  14 use Friendica\Model\APContact;
  15 use Friendica\Model\Contact;
  16 use Friendica\Model\Conversation;
  17 use Friendica\Model\Group;
  18 use Friendica\Model\Item;
  19 use Friendica\Model\ItemDeliveryData;
  20 use Friendica\Model\PushSubscriber;
  21 use Friendica\Model\User;
  22 use Friendica\Network\Probe;
  23 use Friendica\Protocol\ActivityPub;
  24 use Friendica\Protocol\Diaspora;
  25 use Friendica\Protocol\OStatus;
  26 use Friendica\Protocol\Salmon;
  27
  28 require_once 'include/items.php';
  29
  30 /*
  31  * The notifier is typically called with:
  32  *
  33  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  34  *
  35  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  36  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  37  */
  38
  39 class Notifier
  40 {
  41         public static function execute($cmd, $target_id)
  42         {
  43                 $a = BaseObject::getApp();
  44
  45                 Logger::log('Invoked: ' . $cmd . ': ' . $target_id, Logger::DEBUG);
  46
  47                 $top_level = false;
  48                 $recipients = [];
  49                 $url_recipients = [];
  50
  51                 $delivery_contacts_stmt = null;
  52                 $target_item = [];
  53                 $items = [];
  54                 $delivery_queue_count = 0;
  55
  56                 if ($cmd == Delivery::MAIL) {
  57                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  58                         if (!DBA::isResult($message)) {
  59                                 return;
  60                         }
  61                         $uid = $message['uid'];
  62                         $recipients[] = $message['contact-id'];
  63
  64                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  65                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  66                         foreach ($inboxes as $inbox) {
  67                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_id, 'inbox' => $inbox]);
  68                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  69                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  70                         }
  71                 } elseif ($cmd == Delivery::SUGGESTION) {
  72                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $target_id]);
  73                         if (!DBA::isResult($suggest)) {
  74                                 return;
  75                         }
  76                         $uid = $suggest['uid'];
  77                         $recipients[] = $suggest['cid'];
  78                 } elseif ($cmd == Delivery::REMOVAL) {
  79                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  80                 } elseif ($cmd == Delivery::RELOCATION) {
  81                         $uid = $target_id;
  82
  83                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
  84                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'network', 'protocol', 'batch'], $condition);
  85                 } else {
  86                         // find ancestors
  87                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
  88                         $target_item = Item::selectFirst([], $condition);
  89
  90                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
  91                                 return;
  92                         }
  93
  94                         if (!empty($target_item['contact-uid'])) {
  95                                 $uid = $target_item['contact-uid'];
  96                         } elseif (!empty($target_item['uid'])) {
  97                                 $uid = $target_item['uid'];
  98                         } else {
  99                                 Logger::log('Only public users for item ' . $target_id, Logger::DEBUG);
 100                                 return;
 101                         }
 102
 103                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 104                         $params = ['order' => ['id']];
 105                         $items_stmt = Item::select([], $condition, $params);
 106                         if (!DBA::isResult($items_stmt)) {
 107                                 return;
 108                         }
 109
 110                         $items = Item::inArray($items_stmt);
 111
 112                         // avoid race condition with deleting entries
 113                         if ($items[0]['deleted']) {
 114                                 foreach ($items as $item) {
 115                                         $item['deleted'] = 1;
 116                                 }
 117                         }
 118
 119                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 120                                 Logger::log('Top level post');
 121                                 $top_level = true;
 122                         }
 123                 }
 124
 125                 $owner = User::getOwnerDataById($uid);
 126                 if (!$owner) {
 127                         return;
 128                 }
 129
 130                 // Should the post be transmitted to Diaspora?
 131                 $diaspora_delivery = true;
 132
 133                 // If this is a public conversation, notify the feed hub
 134                 $public_message = true;
 135
 136                 // Do a PuSH
 137                 $push_notify = false;
 138
 139                 // Deliver directly to a forum, don't PuSH
 140                 $direct_forum_delivery = false;
 141
 142                 $followup = false;
 143                 $recipients_followup = [];
 144
 145                 if (!empty($target_item) && !empty($items)) {
 146                         $parent = $items[0];
 147
 148                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 149                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $a->queue['priority'], $a->queue['created'], $owner);
 150                         }
 151
 152                         $fields = ['network', 'author-id', 'author-link', 'owner-id'];
 153                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 154                         $thr_parent = Item::selectFirst($fields, $condition);
 155
 156                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 157
 158                         // Only deliver threaded replies (comment to a comment) to Diaspora
 159                         // when the original comment author does support the Diaspora protocol.
 160                         if ($target_item['parent-uri'] != $target_item['thr-parent']) {
 161                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 162                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 163                         }
 164
 165                         // This is IMPORTANT!!!!
 166
 167                         // We will only send a "notify owner to relay" or followup message if the referenced post
 168                         // originated on our system by virtue of having our hostname somewhere
 169                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 170
 171                         // if $parent['wall'] == 1 we will already have the parent message in our array
 172                         // and we will relay the whole lot.
 173
 174                         $localhost = str_replace('www.','',$a->getHostName());
 175                         if (strpos($localhost,':')) {
 176                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 177                         }
 178                         /**
 179                          *
 180                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 181                          * have been known to cause runaway conditions which affected several servers, along with
 182                          * permissions issues.
 183                          *
 184                          */
 185
 186                         $relay_to_owner = false;
 187
 188                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 189                                 $relay_to_owner = true;
 190                         }
 191
 192
 193                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 194                                 $relay_to_owner = true;
 195                         }
 196
 197                         // until the 'origin' flag has been in use for several months
 198                         // we will just use it as a fallback test
 199                         // later we will be able to use it as the primary test of whether or not to relay.
 200
 201                         if (!$target_item['origin']) {
 202                                 $relay_to_owner = false;
 203                         }
 204                         if ($parent['origin']) {
 205                                 $relay_to_owner = false;
 206                         }
 207
 208                         // Special treatment for forum posts
 209                         if (Item::isForumPost($target_item, $owner)) {
 210                                 $relay_to_owner = true;
 211                                 $direct_forum_delivery = true;
 212                         }
 213
 214                         // Avoid that comments in a forum thread are sent to OStatus
 215                         if (Item::isForumPost($parent, $owner)) {
 216                                 $direct_forum_delivery = true;
 217                         }
 218
 219                         if ($relay_to_owner) {
 220                                 // local followup to remote post
 221                                 $followup = true;
 222                                 $public_message = false; // not public
 223                                 $recipients = [$parent['contact-id']];
 224                                 $recipients_followup  = [$parent['contact-id']];
 225
 226                                 Logger::log('Followup ' . $target_item['guid'] . ' to ' . $parent['contact-id'], Logger::DEBUG);
 227
 228                                 //if (!$target_item['private'] && $target_item['wall'] &&
 229                                 if (!$target_item['private'] &&
 230                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 231                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 232                                         $push_notify = true;
 233
 234                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 235                                         $push_notify = true;
 236
 237                                         if ($parent["network"] == Protocol::OSTATUS) {
 238                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 239                                                 // Currently it is work at progress
 240                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 241                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 242                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 243                                                         $recipients_followup[] = $followup_contact['id'];
 244                                                 }
 245                                                 DBA::close($followup_contacts_stmt);
 246                                         }
 247                                 }
 248
 249                                 if ($direct_forum_delivery) {
 250                                         $push_notify = false;
 251                                 }
 252
 253                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 254                         } else {
 255                                 $followup = false;
 256
 257                                 Logger::log('Distributing directly ' . $target_item["guid"], Logger::DEBUG);
 258
 259                                 // don't send deletions onward for other people's stuff
 260
 261                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 262                                         Logger::log('Ignoring delete notification for non-wall item');
 263                                         return;
 264                                 }
 265
 266                                 if (strlen($parent['allow_cid'])
 267                                         || strlen($parent['allow_gid'])
 268                                         || strlen($parent['deny_cid'])
 269                                         || strlen($parent['deny_gid'])) {
 270                                         $public_message = false; // private recipients, not public
 271                                 }
 272
 273                                 $allow_people = expand_acl($parent['allow_cid']);
 274                                 $allow_groups = Group::expand($uid, expand_acl($parent['allow_gid']),true);
 275                                 $deny_people  = expand_acl($parent['deny_cid']);
 276                                 $deny_groups  = Group::expand($uid, expand_acl($parent['deny_gid']));
 277
 278                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 279                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 280
 281                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)) {
 282                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $target_id);
 283                                 }
 284
 285                                 foreach ($items as $item) {
 286                                         $recipients[] = $item['contact-id'];
 287                                         // pull out additional tagged people to notify (if public message)
 288                                         if ($public_message && strlen($item['inform'])) {
 289                                                 $people = explode(',',$item['inform']);
 290                                                 foreach ($people as $person) {
 291                                                         if (substr($person,0,4) === 'cid:') {
 292                                                                 $recipients[] = intval(substr($person,4));
 293                                                         } else {
 294                                                                 $url_recipients[] = substr($person,4);
 295                                                         }
 296                                                 }
 297                                         }
 298                                 }
 299
 300                                 if (count($url_recipients)) {
 301                                         Logger::log('Deliver ' . $target_item["guid"] . ' to _recipients ' . json_encode($url_recipients));
 302                                 }
 303
 304                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 305                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 306                                 $recipients = array_diff($recipients, $deny);
 307
 308                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 309                                 if (
 310                                         function_exists('imap_open')
 311                                         && !Config::get('system','imap_disabled')
 312                                         && $public_message
 313                                         && intval($target_item['pubmail'])
 314                                 ) {
 315                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 316                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 317                                                 $recipients[] = $mail_contact['id'];
 318                                         }
 319                                         DBA::close($mail_contacts_stmt);
 320                                 }
 321                         }
 322
 323                         // If the thread parent is OStatus then do some magic to distribute the messages.
 324                         // We have not only to look at the parent, since it could be a Friendica thread.
 325                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 326                                 $diaspora_delivery = false;
 327
 328                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 329
 330                                 // Send a salmon to the parent author
 331                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 332                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 333                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 334                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 335                                 }
 336
 337                                 // Send a salmon to the parent owner
 338                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 339                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 340                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 341                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 342                                 }
 343
 344                                 // Send a salmon notification to every person we mentioned in the post
 345                                 $arr = explode(',',$target_item['tag']);
 346                                 foreach ($arr as $x) {
 347                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 348                                         $matches = null;
 349                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 350                                                         $probed_contact = Probe::uri($matches[1]);
 351                                                 if ($probed_contact["notify"] != "") {
 352                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 353                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 354                                                 }
 355                                         }
 356                                 }
 357
 358                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 359                                 $networks = [Protocol::DFRN];
 360                         } elseif ($diaspora_delivery) {
 361                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 362                         } else {
 363                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 364                         }
 365                 } else {
 366                         $public_message = false;
 367                 }
 368
 369                 if (empty($delivery_contacts_stmt)) {
 370                         if ($followup) {
 371                                 $recipients = $recipients_followup;
 372                         }
 373                         $condition = ['id' => $recipients, 'self' => false,
 374                                 'blocked' => false, 'pending' => false, 'archive' => false];
 375                         if (!empty($networks)) {
 376                                 $condition['network'] = $networks;
 377                         }
 378                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'network', 'protocol', 'batch'], $condition);
 379                 }
 380
 381                 $conversants = [];
 382                 $batch_delivery = false;
 383
 384                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 385                         $relay_list = [];
 386
 387                         if ($diaspora_delivery) {
 388                                 $batch_delivery = true;
 389
 390                                 $relay_list_stmt = DBA::p(
 391                                         "SELECT
 392                                                 `batch`,
 393                                                 ANY_VALUE(`id`) AS `id`,
 394                                                 ANY_VALUE(`name`) AS `name`,
 395                                                 ANY_VALUE(`network`) AS `network`,
 396                                                 ANY_VALUE(`protocol`) AS `protocol`
 397                                         FROM `contact`
 398                                         WHERE `network` = ?
 399                                         AND `batch` != ''
 400                                         AND `uid` = ?
 401                                         AND `rel` != ?
 402                                         AND NOT `blocked`
 403                                         AND NOT `pending`
 404                                         AND NOT `archive`
 405                                         GROUP BY `batch`",
 406                                         Protocol::DIASPORA,
 407                                         $owner['uid'],
 408                                         Contact::SHARING
 409                                 );
 410                                 $relay_list = DBA::toArray($relay_list_stmt);
 411
 412                                 // Fetch the participation list
 413                                 // The function will ensure that there are no duplicates
 414                                 $relay_list = Diaspora::participantsForThread($target_id, $relay_list);
 415
 416                                 // Add the relay to the list, avoid duplicates.
 417                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 418                                 if (!$followup && !Item::isForumPost($target_item, $owner)) {
 419                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 420                                 }
 421                         }
 422
 423                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 424                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 425
 426                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'url', 'name', 'network', 'protocol'], $condition));
 427
 428                         $r = array_merge($r2, $relay_list);
 429
 430                         if (DBA::isResult($r)) {
 431                                 foreach ($r as $rr) {
 432                                         if (!empty($rr['id']) && Contact::isArchived($rr['id'])) {
 433                                                 Logger::info('Contact is archived', $rr);
 434                                                 continue;
 435                                         }
 436
 437                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 438                                                 Logger::log('Skipping dropping for ' . $rr['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 439                                                 continue;
 440                                         }
 441
 442                                         if (self::skipDFRN($rr, $target_item, $cmd)) {
 443                                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN', ['url' => $rr['url']]);
 444                                                 continue;
 445                                         }
 446
 447                                         $conversants[] = $rr['id'];
 448
 449                                         $delivery_queue_count++;
 450
 451                                         Logger::log('Public delivery of item ' . $target_item["guid"] . ' (' . $target_id . ') to ' . json_encode($rr), Logger::DEBUG);
 452
 453                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 454                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 455                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 456                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 457                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 458                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 459                                         } else {
 460                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 461                                         }
 462                                         Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id']);
 463                                 }
 464                         }
 465
 466                         $push_notify = true;
 467                 }
 468
 469                 // delivery loop
 470                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 471                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 472                                 Logger::info('Contact is archived', $contact);
 473                                 continue;
 474                         }
 475
 476                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 477                                 Logger::log('Skipping dropping for ' . $contact['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 478                                 continue;
 479                         }
 480
 481                         if (self::skipDFRN($contact, $target_item, $cmd)) {
 482                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN', ['url' => $contact['url']]);
 483                                 continue;
 484                         }
 485
 486                         // Don't deliver to Diaspora if it already had been done as batch delivery
 487                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 488                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 489                                 continue;
 490                         }
 491
 492                         // Don't deliver to folks who have already been delivered to
 493                         if (in_array($contact['id'], $conversants)) {
 494                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 495                                 continue;
 496                         }
 497
 498                         $delivery_queue_count++;
 499
 500                         Logger::log('Delivery of item ' . $target_id . ' to ' . json_encode($contact), Logger::DEBUG);
 501
 502                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 503                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 504                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 505                         if ($contact['network'] == Protocol::DIASPORA) {
 506                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 507                         } else {
 508                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 509                         }
 510                         Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id']);
 511                 }
 512                 DBA::close($delivery_contacts_stmt);
 513
 514                 $url_recipients = array_filter($url_recipients);
 515                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 516                 // They are especially used for notifications to OStatus users that don't follow us.
 517                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 518                         $delivery_queue_count += count($url_recipients);
 519                         $slap = OStatus::salmon($target_item, $owner);
 520                         foreach ($url_recipients as $url) {
 521                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 522                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 523                                 Salmon::slapper($owner, $url, $slap);
 524                                 ItemDeliveryData::incrementQueueDone($target_id, ItemDeliveryData::OSTATUS);
 525                         }
 526                 }
 527
 528                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 529                 if ($push_notify) {
 530                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 531
 532                         // Handling the pubsubhubbub requests
 533                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 534                 }
 535
 536                 if (!empty($target_item)) {
 537                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 538
 539                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 540
 541                         Hook::callAll('notifier_end', $target_item);
 542
 543                         // Workaround for pure connector posts
 544                         if ($delivery_queue_count == 0) {
 545                                 ItemDeliveryData::incrementQueueDone($target_item['id']);
 546                                 $delivery_queue_count = 1;
 547                         }
 548
 549                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 550                                 ItemDeliveryData::update($target_item['id'], ['queue_count' => $delivery_queue_count]);
 551                         }
 552                 }
 553
 554                 return;
 555         }
 556
 557         /**
 558          * Checks if the current delivery process needs to be transported via DFRN.
 559          *
 560          * @param array  $contact Receiver of the post
 561          * @param array  $item    The post
 562          * @param string $cmd     Notifier command
 563          * @return bool
 564          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 565          * @throws \ImagickException
 566          */
 567         private static function skipDFRN($contact, $item, $cmd)
 568         {
 569                 // Don't skip when author or owner don't have AP profiles
 570                 if ((!empty($item['author-link']) && empty(APContact::getByURL($item['author-link'], false))) || (!empty($item['owner-link']) && empty(APContact::getByURL($item['owner-link'], false)))) {
 571                         return false;
 572                 }
 573
 574                 // Don't skip DFRN delivery for these commands
 575                 if (in_array($cmd, [Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION, Delivery::POKE])) {
 576                         return false;
 577                 }
 578
 579                 // Skip DFRN when the item will be (forcefully) delivered via AP
 580                 if (Config::get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 581                         return true;
 582                 }
 583
 584                 // Skip DFRN delivery if the contact speaks ActivityPub
 585                 return in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && ($contact['protocol'] == Protocol::ACTIVITYPUB);
 586         }
 587
 588         /**
 589          * Checks if the current action is a deletion command of a account removal activity
 590          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 591          * These protocols do have a dedicated command for deleting a whole account.
 592          *
 593          * @param string $cmd     Notifier command
 594          * @param array  $owner   Sender of the post
 595          * @param string $network Receiver network
 596          * @return bool
 597          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 598          * @throws \ImagickException
 599          */
 600         private static function isRemovalActivity($cmd, $owner, $network)
 601         {
 602                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 603         }
 604
 605         /**
 606          * @param int    $self_user_id
 607          * @param int    $priority The priority the Notifier queue item was created with
 608          * @param string $created  The date the Notifier queue item was created on
 609          * @return bool
 610          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 611          * @throws \ImagickException
 612          */
 613         private static function notifySelfRemoval($self_user_id, $priority, $created)
 614         {
 615                 $owner = User::getOwnerDataById($self_user_id);
 616                 if (!$owner) {
 617                         return false;
 618                 }
 619
 620                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 621                 if (!DBA::isResult($contacts_stmt)) {
 622                         return false;
 623                 }
 624
 625                 while($contact = DBA::fetch($contacts_stmt)) {
 626                         Contact::terminateFriendship($owner, $contact, true);
 627                 }
 628                 DBA::close($contacts_stmt);
 629
 630                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 631                 foreach ($inboxes as $inbox) {
 632                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 633                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 634                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 635                 }
 636
 637                 return true;
 638         }
 639
 640         /**
 641          * @param string $cmd
 642          * @param array  $target_item
 643          * @param array  $parent
 644          * @param int    $priority The priority the Notifier queue item was created with
 645          * @param string $created  The date the Notifier queue item was created on
 646          * @return int The number of delivery tasks created
 647          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 648          * @throws \ImagickException
 649          */
 650         private static function activityPubDelivery($cmd, array $target_item, array $parent, $priority, $created, $owner)
 651         {
 652                 $inboxes = [];
 653
 654                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 655
 656                 if ($target_item['origin']) {
 657                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 658                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 659                 } elseif (Item::isForumPost($target_item, $owner)) {
 660                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 661                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 662                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 663                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 664                         return 0;
 665                 } elseif ($parent['origin']) {
 666                         // Remote items are transmitted via the personal inboxes.
 667                         // Doing so ensures that the dedicated receiver will get the message.
 668                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 669                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 670                 }
 671
 672                 if (empty($inboxes)) {
 673                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 674                         return 0;
 675                 }
 676
 677                 // Fill the item cache
 678                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 679
 680                 foreach ($inboxes as $inbox) {
 681                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 682
 683                         Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 684                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid);
 685                 }
 686
 687                 return count($inboxes);
 688         }
 689 }