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 use Friendica\Util\ACLFormatter;
  28
  29 require_once 'include/items.php';
  30
  31 /*
  32  * The notifier is typically called with:
  33  *
  34  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  35  *
  36  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  37  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  38  */
  39
  40 class Notifier
  41 {
  42         public static function execute($cmd, $target_id)
  43         {
  44                 $a = BaseObject::getApp();
  45
  46                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id]);
  47
  48                 $top_level = false;
  49                 $recipients = [];
  50                 $url_recipients = [];
  51
  52                 $delivery_contacts_stmt = null;
  53                 $target_item = [];
  54                 $items = [];
  55                 $delivery_queue_count = 0;
  56
  57                 if ($cmd == Delivery::MAIL) {
  58                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  59                         if (!DBA::isResult($message)) {
  60                                 return;
  61                         }
  62                         $uid = $message['uid'];
  63                         $recipients[] = $message['contact-id'];
  64
  65                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  66                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  67                         foreach ($inboxes as $inbox) {
  68                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  69                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  70                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  71                         }
  72                 } elseif ($cmd == Delivery::SUGGESTION) {
  73                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $target_id]);
  74                         if (!DBA::isResult($suggest)) {
  75                                 return;
  76                         }
  77                         $uid = $suggest['uid'];
  78                         $recipients[] = $suggest['cid'];
  79                 } elseif ($cmd == Delivery::REMOVAL) {
  80                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  81                 } elseif ($cmd == Delivery::RELOCATION) {
  82                         $uid = $target_id;
  83
  84                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
  85                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'batch'], $condition);
  86                 } else {
  87                         // find ancestors
  88                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
  89                         $target_item = Item::selectFirst([], $condition);
  90
  91                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
  92                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
  93                                 return;
  94                         }
  95
  96                         if (!empty($target_item['contact-uid'])) {
  97                                 $uid = $target_item['contact-uid'];
  98                         } elseif (!empty($target_item['uid'])) {
  99                                 $uid = $target_item['uid'];
 100                         } else {
 101                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 102                                 return;
 103                         }
 104
 105                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 106                         $params = ['order' => ['id']];
 107                         $items_stmt = Item::select([], $condition, $params);
 108                         if (!DBA::isResult($items_stmt)) {
 109                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 110                                 return;
 111                         }
 112
 113                         $items = Item::inArray($items_stmt);
 114
 115                         // avoid race condition with deleting entries
 116                         if ($items[0]['deleted']) {
 117                                 foreach ($items as $item) {
 118                                         $item['deleted'] = 1;
 119                                 }
 120                         }
 121
 122                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 123                                 Logger::info('Top level post', ['target' => $target_id]);
 124                                 $top_level = true;
 125                         }
 126                 }
 127
 128                 $owner = User::getOwnerDataById($uid);
 129                 if (!$owner) {
 130                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 131                         return;
 132                 }
 133
 134                 // Should the post be transmitted to Diaspora?
 135                 $diaspora_delivery = true;
 136
 137                 // If this is a public conversation, notify the feed hub
 138                 $public_message = true;
 139
 140                 // Do a PuSH
 141                 $push_notify = false;
 142
 143                 // Deliver directly to a forum, don't PuSH
 144                 $direct_forum_delivery = false;
 145
 146                 $followup = false;
 147                 $recipients_followup = [];
 148
 149                 if (!empty($target_item) && !empty($items)) {
 150                         $parent = $items[0];
 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 ' . $thr_parent['network'], Logger::DEBUG);
 157
 158                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 159                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['created'], $owner);
 160                         }
 161
 162                         // Only deliver threaded replies (comment to a comment) to Diaspora
 163                         // when the original comment author does support the Diaspora protocol.
 164                         if ($target_item['parent-uri'] != $target_item['thr-parent']) {
 165                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 166                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 167                         }
 168
 169                         // This is IMPORTANT!!!!
 170
 171                         // We will only send a "notify owner to relay" or followup message if the referenced post
 172                         // originated on our system by virtue of having our hostname somewhere
 173                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 174
 175                         // if $parent['wall'] == 1 we will already have the parent message in our array
 176                         // and we will relay the whole lot.
 177
 178                         $localhost = str_replace('www.','',$a->getHostName());
 179                         if (strpos($localhost,':')) {
 180                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 181                         }
 182                         /**
 183                          *
 184                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 185                          * have been known to cause runaway conditions which affected several servers, along with
 186                          * permissions issues.
 187                          *
 188                          */
 189
 190                         $relay_to_owner = false;
 191
 192                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 193                                 $relay_to_owner = true;
 194                         }
 195
 196                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 197                                 $relay_to_owner = true;
 198                         }
 199
 200                         // until the 'origin' flag has been in use for several months
 201                         // we will just use it as a fallback test
 202                         // later we will be able to use it as the primary test of whether or not to relay.
 203
 204                         if (!$target_item['origin']) {
 205                                 $relay_to_owner = false;
 206                         }
 207                         if ($parent['origin']) {
 208                                 $relay_to_owner = false;
 209                         }
 210
 211                         // Special treatment for forum posts
 212                         if (Item::isForumPost($target_item, $owner)) {
 213                                 $relay_to_owner = true;
 214                                 $direct_forum_delivery = true;
 215                         }
 216
 217                         // Avoid that comments in a forum thread are sent to OStatus
 218                         if (Item::isForumPost($parent, $owner)) {
 219                                 $direct_forum_delivery = true;
 220                         }
 221
 222                         if ($relay_to_owner) {
 223                                 // local followup to remote post
 224                                 $followup = true;
 225                                 $public_message = false; // not public
 226                                 $recipients = [$parent['contact-id']];
 227                                 $recipients_followup  = [$parent['contact-id']];
 228
 229                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 230
 231                                 //if (!$target_item['private'] && $target_item['wall'] &&
 232                                 if (!$target_item['private'] &&
 233                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 234                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 235                                         $push_notify = true;
 236
 237                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 238                                         $push_notify = true;
 239
 240                                         if ($parent["network"] == Protocol::OSTATUS) {
 241                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 242                                                 // Currently it is work at progress
 243                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 244                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 245                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 246                                                         $recipients_followup[] = $followup_contact['id'];
 247                                                 }
 248                                                 DBA::close($followup_contacts_stmt);
 249                                         }
 250                                 }
 251
 252                                 if ($direct_forum_delivery) {
 253                                         $push_notify = false;
 254                                 }
 255
 256                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 257                         } else {
 258                                 $followup = false;
 259
 260                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 261
 262                                 // don't send deletions onward for other people's stuff
 263
 264                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 265                                         Logger::log('Ignoring delete notification for non-wall item');
 266                                         return;
 267                                 }
 268
 269                                 if (strlen($parent['allow_cid'])
 270                                         || strlen($parent['allow_gid'])
 271                                         || strlen($parent['deny_cid'])
 272                                         || strlen($parent['deny_gid'])) {
 273                                         $public_message = false; // private recipients, not public
 274                                 }
 275
 276                                 /** @var ACLFormatter $aclFormatter */
 277                                 $aclFormatter = BaseObject::getClass(ACLFormatter::class);
 278
 279                                 $allow_people = $aclFormatter->expand($parent['allow_cid'] ?? '');
 280                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid'] ?? ''),true);
 281                                 $deny_people  = $aclFormatter->expand($parent['deny_cid'] ?? '');
 282                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid'] ?? ''));
 283
 284                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 285                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 286
 287                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)) {
 288                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $target_id);
 289                                 }
 290
 291                                 foreach ($items as $item) {
 292                                         $recipients[] = $item['contact-id'];
 293                                         // pull out additional tagged people to notify (if public message)
 294                                         if ($public_message && strlen($item['inform'])) {
 295                                                 $people = explode(',',$item['inform']);
 296                                                 foreach ($people as $person) {
 297                                                         if (substr($person,0,4) === 'cid:') {
 298                                                                 $recipients[] = intval(substr($person,4));
 299                                                         } else {
 300                                                                 $url_recipients[] = substr($person,4);
 301                                                         }
 302                                                 }
 303                                         }
 304                                 }
 305
 306                                 if (count($url_recipients)) {
 307                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 308                                 }
 309
 310                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 311                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 312                                 $recipients = array_diff($recipients, $deny);
 313
 314                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 315                                 if (
 316                                         function_exists('imap_open')
 317                                         && !Config::get('system','imap_disabled')
 318                                         && $public_message
 319                                         && intval($target_item['pubmail'])
 320                                 ) {
 321                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 322                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 323                                                 $recipients[] = $mail_contact['id'];
 324                                         }
 325                                         DBA::close($mail_contacts_stmt);
 326                                 }
 327                         }
 328
 329                         // If the thread parent is OStatus then do some magic to distribute the messages.
 330                         // We have not only to look at the parent, since it could be a Friendica thread.
 331                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 332                                 $diaspora_delivery = false;
 333
 334                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 335
 336                                 // Send a salmon to the parent author
 337                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 338                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 339                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 340                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 341                                 }
 342
 343                                 // Send a salmon to the parent owner
 344                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 345                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 346                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 347                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 348                                 }
 349
 350                                 // Send a salmon notification to every person we mentioned in the post
 351                                 $arr = explode(',',$target_item['tag']);
 352                                 foreach ($arr as $x) {
 353                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 354                                         $matches = null;
 355                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 356                                                         $probed_contact = Probe::uri($matches[1]);
 357                                                 if ($probed_contact["notify"] != "") {
 358                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 359                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 360                                                 }
 361                                         }
 362                                 }
 363
 364                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 365                                 $networks = [Protocol::DFRN];
 366                         } elseif ($diaspora_delivery) {
 367                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 368                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 369                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 370                                         $networks[] = Protocol::ACTIVITYPUB;
 371                                 }
 372                         } else {
 373                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 374                         }
 375                 } else {
 376                         $public_message = false;
 377                 }
 378
 379                 if (empty($delivery_contacts_stmt)) {
 380                         if ($followup) {
 381                                 $recipients = $recipients_followup;
 382                         }
 383                         $condition = ['id' => $recipients, 'self' => false,
 384                                 'blocked' => false, 'pending' => false, 'archive' => false];
 385                         if (!empty($networks)) {
 386                                 $condition['network'] = $networks;
 387                         }
 388                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 389                 }
 390
 391                 $conversants = [];
 392                 $batch_delivery = false;
 393
 394                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 395                         $relay_list = [];
 396
 397                         if ($diaspora_delivery) {
 398                                 $batch_delivery = true;
 399
 400                                 $relay_list_stmt = DBA::p(
 401                                         "SELECT
 402                                                 `batch`,
 403                                                 ANY_VALUE(`id`) AS `id`,
 404                                                 ANY_VALUE(`name`) AS `name`,
 405                                                 ANY_VALUE(`network`) AS `network`,
 406                                                 ANY_VALUE(`protocol`) AS `protocol`
 407                                         FROM `contact`
 408                                         WHERE `network` = ?
 409                                         AND `batch` != ''
 410                                         AND `uid` = ?
 411                                         AND `rel` != ?
 412                                         AND NOT `blocked`
 413                                         AND NOT `pending`
 414                                         AND NOT `archive`
 415                                         GROUP BY `batch`",
 416                                         Protocol::DIASPORA,
 417                                         $owner['uid'],
 418                                         Contact::SHARING
 419                                 );
 420                                 $relay_list = DBA::toArray($relay_list_stmt);
 421
 422                                 // Fetch the participation list
 423                                 // The function will ensure that there are no duplicates
 424                                 $relay_list = Diaspora::participantsForThread($target_id, $relay_list);
 425
 426                                 // Add the relay to the list, avoid duplicates.
 427                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 428                                 if (!$followup && !Item::isForumPost($target_item, $owner)) {
 429                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 430                                 }
 431                         }
 432
 433                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 434                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 435
 436                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 437
 438                         $r = array_merge($r2, $relay_list);
 439
 440                         if (DBA::isResult($r)) {
 441                                 foreach ($r as $rr) {
 442                                         if (!empty($rr['addr']) && ($rr['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $rr['addr']])) {
 443                                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $rr['url']]);
 444                                                 continue;
 445                                         }
 446
 447                                         if (!empty($rr['id']) && Contact::isArchived($rr['id'])) {
 448                                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $rr['url']]);
 449                                                 continue;
 450                                         }
 451
 452                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 453                                                 Logger::log('Skipping dropping for ' . $rr['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 454                                                 continue;
 455                                         }
 456
 457                                         if (self::skipDFRN($rr, $target_item, $parent, $thr_parent, $cmd)) {
 458                                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['id' => $target_id, 'url' => $rr['url']]);
 459                                                 continue;
 460                                         }
 461
 462                                         $conversants[] = $rr['id'];
 463
 464                                         Logger::info('Public delivery', ['target' => $target_id, 'guid' => $target_item["guid"], 'to' => $rr]);
 465
 466                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 467                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 468                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 469                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 470                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 471                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 472                                         } else {
 473                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 474                                         }
 475
 476                                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id'])) {
 477                                                 $delivery_queue_count++;
 478                                         }
 479                                 }
 480                         }
 481
 482                         $push_notify = true;
 483                 }
 484
 485                 // delivery loop
 486                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 487                         if (!empty($contact['addr']) && ($contact['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $contact['addr']])) {
 488                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $contact['url']]);
 489                                 continue;
 490                         }
 491
 492                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 493                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $contact['url']]);
 494                                 continue;
 495                         }
 496
 497                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 498                                 Logger::log('Skipping dropping for ' . $contact['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 499                                 continue;
 500                         }
 501
 502                         if (self::skipDFRN($contact, $target_item, $parent, $thr_parent, $cmd)) {
 503                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'url' => contact['url']]);
 504                                 continue;
 505                         }
 506
 507                         // Don't deliver to Diaspora if it already had been done as batch delivery
 508                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 509                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 510                                 continue;
 511                         }
 512
 513                         // Don't deliver to folks who have already been delivered to
 514                         if (in_array($contact['id'], $conversants)) {
 515                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 516                                 continue;
 517                         }
 518
 519                         Logger::info('Delivery', ['id' => $target_id, 'to' => $contact]);
 520
 521                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 522                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 523                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 524                         if ($contact['network'] == Protocol::DIASPORA) {
 525                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 526                         } else {
 527                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 528                         }
 529
 530                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id'])) {
 531                                 $delivery_queue_count++;
 532                         }
 533                 }
 534                 DBA::close($delivery_contacts_stmt);
 535
 536                 $url_recipients = array_filter($url_recipients);
 537                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 538                 // They are especially used for notifications to OStatus users that don't follow us.
 539                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 540                         $slap = OStatus::salmon($target_item, $owner);
 541                         foreach ($url_recipients as $url) {
 542                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 543                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 544                                 $delivery_queue_count++;
 545                                 Salmon::slapper($owner, $url, $slap);
 546                                 ItemDeliveryData::incrementQueueDone($target_id, ItemDeliveryData::OSTATUS);
 547                         }
 548                 }
 549
 550                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 551                 if ($push_notify) {
 552                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 553
 554                         // Handling the pubsubhubbub requests
 555                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 556                 }
 557
 558                 if (!empty($target_item)) {
 559                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 560
 561                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 562
 563                         Hook::callAll('notifier_end', $target_item);
 564
 565                         // Workaround for pure connector posts
 566                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 567                                 if ($delivery_queue_count == 0) {
 568                                         ItemDeliveryData::incrementQueueDone($target_item['id']);
 569                                         $delivery_queue_count = 1;
 570                                 }
 571
 572                                 ItemDeliveryData::incrementQueueCount($target_item['id'], $delivery_queue_count);
 573                         }
 574                 }
 575
 576                 return;
 577         }
 578
 579         /**
 580          * Checks if the current delivery process needs to be transported via DFRN.
 581          *
 582          * @param array  $contact    Receiver of the post
 583          * @param array  $item       The post
 584          * @param array  $parent     The parent
 585          * @param array  $thr_parent The thread parent
 586          * @param string $cmd        Notifier command
 587          * @return bool
 588          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 589          * @throws \ImagickException
 590          */
 591         private static function skipDFRN($contact, $item, $parent, $thr_parent, $cmd)
 592         {
 593                 // Don't skip when the starting post is delivered via Diaspora
 594                 if ($parent['network'] == Protocol::DIASPORA) {
 595                         return false;
 596                 }
 597
 598                 // Also don't skip when the direct thread parent was delivered via Diaspora
 599                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 600                         return false;
 601                 }
 602
 603                 // Use DFRN if we are on the same site
 604                 if (!empty($contact['url']) && Contact::isLocal($contact['url'])) {
 605                         return false;
 606                 }
 607
 608                 // Don't skip when author or owner don't have AP profiles
 609                 if ((!empty($item['author-link']) && empty(APContact::getByURL($item['author-link'], false))) || (!empty($item['owner-link']) && empty(APContact::getByURL($item['owner-link'], false)))) {
 610                         return false;
 611                 }
 612
 613                 // Don't skip DFRN delivery for these commands
 614                 if (in_array($cmd, [Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION, Delivery::POKE])) {
 615                         return false;
 616                 }
 617
 618                 // Skip DFRN when the item will be (forcefully) delivered via AP
 619                 if (Config::get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 620                         return true;
 621                 }
 622
 623                 // Skip DFRN delivery if the contact speaks ActivityPub
 624                 return in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && ($contact['protocol'] == Protocol::ACTIVITYPUB);
 625         }
 626
 627         /**
 628          * Checks if the current action is a deletion command of a account removal activity
 629          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 630          * These protocols do have a dedicated command for deleting a whole account.
 631          *
 632          * @param string $cmd     Notifier command
 633          * @param array  $owner   Sender of the post
 634          * @param string $network Receiver network
 635          * @return bool
 636          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 637          * @throws \ImagickException
 638          */
 639         private static function isRemovalActivity($cmd, $owner, $network)
 640         {
 641                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 642         }
 643
 644         /**
 645          * @param int    $self_user_id
 646          * @param int    $priority The priority the Notifier queue item was created with
 647          * @param string $created  The date the Notifier queue item was created on
 648          * @return bool
 649          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 650          * @throws \ImagickException
 651          */
 652         private static function notifySelfRemoval($self_user_id, $priority, $created)
 653         {
 654                 $owner = User::getOwnerDataById($self_user_id);
 655                 if (!$owner) {
 656                         return false;
 657                 }
 658
 659                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 660                 if (!DBA::isResult($contacts_stmt)) {
 661                         return false;
 662                 }
 663
 664                 while($contact = DBA::fetch($contacts_stmt)) {
 665                         Contact::terminateFriendship($owner, $contact, true);
 666                 }
 667                 DBA::close($contacts_stmt);
 668
 669                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 670                 foreach ($inboxes as $inbox) {
 671                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 672                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 673                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 674                 }
 675
 676                 return true;
 677         }
 678
 679         /**
 680          * @param string $cmd
 681          * @param array  $target_item
 682          * @param array  $parent
 683          * @param array  $thr_parent
 684          * @param int    $priority The priority the Notifier queue item was created with
 685          * @param string $created  The date the Notifier queue item was created on
 686          * @return int The number of delivery tasks created
 687          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 688          * @throws \ImagickException
 689          */
 690         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 691         {
 692                 // Don't deliver via AP when the starting post is delivered via Diaspora
 693                 if ($parent['network'] == Protocol::DIASPORA) {
 694                         return 0;
 695                 }
 696
 697                 // Also don't deliver  when the direct thread parent was delivered via Diaspora
 698                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 699                         return 0;
 700                 }
 701
 702                 $inboxes = [];
 703
 704                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 705
 706                 if ($target_item['origin']) {
 707                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 708                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 709                 } elseif (Item::isForumPost($target_item, $owner)) {
 710                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 711                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 712                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 713                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 714                         return 0;
 715                 } elseif ($parent['origin']) {
 716                         // Remote items are transmitted via the personal inboxes.
 717                         // Doing so ensures that the dedicated receiver will get the message.
 718                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 719                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 720                 }
 721
 722                 if (empty($inboxes)) {
 723                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 724                         return 0;
 725                 }
 726
 727                 // Fill the item cache
 728                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 729
 730                 $delivery_queue_count = 0;
 731
 732                 foreach ($inboxes as $inbox) {
 733                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 734
 735                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 736                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid)) {
 737                                 $delivery_queue_count++;
 738                         }
 739                 }
 740
 741                 return $delivery_queue_count;
 742         }
 743 }