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