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                 $parent = [];
  55                 $thr_parent = [];
  56                 $items = [];
  57                 $delivery_queue_count = 0;
  58
  59                 if ($cmd == Delivery::MAIL) {
  60                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  61                         if (!DBA::isResult($message)) {
  62                                 return;
  63                         }
  64                         $uid = $message['uid'];
  65                         $recipients[] = $message['contact-id'];
  66
  67                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  68                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  69                         foreach ($inboxes as $inbox) {
  70                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  71                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  72                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  73                         }
  74                 } elseif ($cmd == Delivery::SUGGESTION) {
  75                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $target_id]);
  76                         if (!DBA::isResult($suggest)) {
  77                                 return;
  78                         }
  79                         $uid = $suggest['uid'];
  80                         $recipients[] = $suggest['cid'];
  81                 } elseif ($cmd == Delivery::REMOVAL) {
  82                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  83                 } elseif ($cmd == Delivery::RELOCATION) {
  84                         $uid = $target_id;
  85
  86                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
  87                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'batch'], $condition);
  88                 } else {
  89                         // find ancestors
  90                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
  91                         $target_item = Item::selectFirst([], $condition);
  92
  93                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
  94                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
  95                                 return;
  96                         }
  97
  98                         if (!empty($target_item['contact-uid'])) {
  99                                 $uid = $target_item['contact-uid'];
 100                         } elseif (!empty($target_item['uid'])) {
 101                                 $uid = $target_item['uid'];
 102                         } else {
 103                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 104                                 return;
 105                         }
 106
 107                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 108                         $params = ['order' => ['id']];
 109                         $items_stmt = Item::select([], $condition, $params);
 110                         if (!DBA::isResult($items_stmt)) {
 111                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 112                                 return;
 113                         }
 114
 115                         $items = Item::inArray($items_stmt);
 116
 117                         // avoid race condition with deleting entries
 118                         if ($items[0]['deleted']) {
 119                                 foreach ($items as $item) {
 120                                         $item['deleted'] = 1;
 121                                 }
 122                         }
 123
 124                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 125                                 Logger::info('Top level post', ['target' => $target_id]);
 126                                 $top_level = true;
 127                         }
 128                 }
 129
 130                 $owner = User::getOwnerDataById($uid);
 131                 if (!$owner) {
 132                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 133                         return;
 134                 }
 135
 136                 // Should the post be transmitted to Diaspora?
 137                 $diaspora_delivery = true;
 138
 139                 // If this is a public conversation, notify the feed hub
 140                 $public_message = true;
 141
 142                 // Do a PuSH
 143                 $push_notify = false;
 144
 145                 // Deliver directly to a forum, don't PuSH
 146                 $direct_forum_delivery = false;
 147
 148                 $followup = false;
 149                 $recipients_followup = [];
 150
 151                 if (!empty($target_item) && !empty($items)) {
 152                         $parent = $items[0];
 153
 154                         $fields = ['network', 'author-id', 'author-link', 'owner-id'];
 155                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 156                         $thr_parent = Item::selectFirst($fields, $condition);
 157                         if (empty($thr_parent)) {
 158                                 $thr_parent = $parent;
 159                         }
 160
 161                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 162
 163                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 164                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['created'], $owner);
 165                         }
 166
 167                         // Only deliver threaded replies (comment to a comment) to Diaspora
 168                         // when the original comment author does support the Diaspora protocol.
 169                         if ($target_item['parent-uri'] != $target_item['thr-parent']) {
 170                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 171                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 172                         }
 173
 174                         // This is IMPORTANT!!!!
 175
 176                         // We will only send a "notify owner to relay" or followup message if the referenced post
 177                         // originated on our system by virtue of having our hostname somewhere
 178                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 179
 180                         // if $parent['wall'] == 1 we will already have the parent message in our array
 181                         // and we will relay the whole lot.
 182
 183                         $localhost = str_replace('www.','',$a->getHostName());
 184                         if (strpos($localhost,':')) {
 185                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 186                         }
 187                         /**
 188                          *
 189                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 190                          * have been known to cause runaway conditions which affected several servers, along with
 191                          * permissions issues.
 192                          *
 193                          */
 194
 195                         $relay_to_owner = false;
 196
 197                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 198                                 $relay_to_owner = true;
 199                         }
 200
 201                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 202                                 $relay_to_owner = true;
 203                         }
 204
 205                         // until the 'origin' flag has been in use for several months
 206                         // we will just use it as a fallback test
 207                         // later we will be able to use it as the primary test of whether or not to relay.
 208
 209                         if (!$target_item['origin']) {
 210                                 $relay_to_owner = false;
 211                         }
 212                         if ($parent['origin']) {
 213                                 $relay_to_owner = false;
 214                         }
 215
 216                         // Special treatment for forum posts
 217                         if (Item::isForumPost($target_item, $owner)) {
 218                                 $relay_to_owner = true;
 219                                 $direct_forum_delivery = true;
 220                         }
 221
 222                         // Avoid that comments in a forum thread are sent to OStatus
 223                         if (Item::isForumPost($parent, $owner)) {
 224                                 $direct_forum_delivery = true;
 225                         }
 226
 227                         if ($relay_to_owner) {
 228                                 // local followup to remote post
 229                                 $followup = true;
 230                                 $public_message = false; // not public
 231                                 $recipients = [$parent['contact-id']];
 232                                 $recipients_followup  = [$parent['contact-id']];
 233
 234                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 235
 236                                 //if (!$target_item['private'] && $target_item['wall'] &&
 237                                 if (!$target_item['private'] &&
 238                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 239                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 240                                         $push_notify = true;
 241
 242                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 243                                         $push_notify = true;
 244
 245                                         if ($parent["network"] == Protocol::OSTATUS) {
 246                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 247                                                 // Currently it is work at progress
 248                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 249                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 250                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 251                                                         $recipients_followup[] = $followup_contact['id'];
 252                                                 }
 253                                                 DBA::close($followup_contacts_stmt);
 254                                         }
 255                                 }
 256
 257                                 if ($direct_forum_delivery) {
 258                                         $push_notify = false;
 259                                 }
 260
 261                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 262                         } else {
 263                                 $followup = false;
 264
 265                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 266
 267                                 // don't send deletions onward for other people's stuff
 268
 269                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 270                                         Logger::log('Ignoring delete notification for non-wall item');
 271                                         return;
 272                                 }
 273
 274                                 if (strlen($parent['allow_cid'])
 275                                         || strlen($parent['allow_gid'])
 276                                         || strlen($parent['deny_cid'])
 277                                         || strlen($parent['deny_gid'])) {
 278                                         $public_message = false; // private recipients, not public
 279                                 }
 280
 281                                 /** @var ACLFormatter $aclFormatter */
 282                                 $aclFormatter = BaseObject::getClass(ACLFormatter::class);
 283
 284                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 285                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 286                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 287                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 288
 289                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 290                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 291
 292                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)) {
 293                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $target_id);
 294                                 }
 295
 296                                 foreach ($items as $item) {
 297                                         $recipients[] = $item['contact-id'];
 298                                         // pull out additional tagged people to notify (if public message)
 299                                         if ($public_message && strlen($item['inform'])) {
 300                                                 $people = explode(',',$item['inform']);
 301                                                 foreach ($people as $person) {
 302                                                         if (substr($person,0,4) === 'cid:') {
 303                                                                 $recipients[] = intval(substr($person,4));
 304                                                         } else {
 305                                                                 $url_recipients[] = substr($person,4);
 306                                                         }
 307                                                 }
 308                                         }
 309                                 }
 310
 311                                 if (count($url_recipients)) {
 312                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 313                                 }
 314
 315                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 316                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 317                                 $recipients = array_diff($recipients, $deny);
 318
 319                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 320                                 if (
 321                                         function_exists('imap_open')
 322                                         && !Config::get('system','imap_disabled')
 323                                         && $public_message
 324                                         && intval($target_item['pubmail'])
 325                                 ) {
 326                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 327                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 328                                                 $recipients[] = $mail_contact['id'];
 329                                         }
 330                                         DBA::close($mail_contacts_stmt);
 331                                 }
 332                         }
 333
 334                         // If the thread parent is OStatus then do some magic to distribute the messages.
 335                         // We have not only to look at the parent, since it could be a Friendica thread.
 336                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 337                                 $diaspora_delivery = false;
 338
 339                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 340
 341                                 // Send a salmon to the parent author
 342                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 343                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 344                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 345                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 346                                 }
 347
 348                                 // Send a salmon to the parent owner
 349                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 350                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 351                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 352                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 353                                 }
 354
 355                                 // Send a salmon notification to every person we mentioned in the post
 356                                 $arr = explode(',',$target_item['tag']);
 357                                 foreach ($arr as $x) {
 358                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 359                                         $matches = null;
 360                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 361                                                         $probed_contact = Probe::uri($matches[1]);
 362                                                 if ($probed_contact["notify"] != "") {
 363                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 364                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 365                                                 }
 366                                         }
 367                                 }
 368
 369                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 370                                 $networks = [Protocol::DFRN];
 371                         } elseif ($diaspora_delivery) {
 372                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 373                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 374                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 375                                         $networks[] = Protocol::ACTIVITYPUB;
 376                                 }
 377                         } else {
 378                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 379                         }
 380                 } else {
 381                         $public_message = false;
 382                 }
 383
 384                 if (empty($delivery_contacts_stmt)) {
 385                         if ($followup) {
 386                                 $recipients = $recipients_followup;
 387                         }
 388                         $condition = ['id' => $recipients, 'self' => false,
 389                                 'blocked' => false, 'pending' => false, 'archive' => false];
 390                         if (!empty($networks)) {
 391                                 $condition['network'] = $networks;
 392                         }
 393                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 394                 }
 395
 396                 $conversants = [];
 397                 $batch_delivery = false;
 398
 399                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 400                         $relay_list = [];
 401
 402                         if ($diaspora_delivery) {
 403                                 $batch_delivery = true;
 404
 405                                 $relay_list_stmt = DBA::p(
 406                                         "SELECT
 407                                                 `batch`,
 408                                                 ANY_VALUE(`id`) AS `id`,
 409                                                 ANY_VALUE(`url`) AS `url`,
 410                                                 ANY_VALUE(`name`) AS `name`,
 411                                                 ANY_VALUE(`network`) AS `network`,
 412                                                 ANY_VALUE(`protocol`) AS `protocol`
 413                                         FROM `contact`
 414                                         WHERE `network` = ?
 415                                         AND `batch` != ''
 416                                         AND `uid` = ?
 417                                         AND `rel` != ?
 418                                         AND NOT `blocked`
 419                                         AND NOT `pending`
 420                                         AND NOT `archive`
 421                                         GROUP BY `batch`",
 422                                         Protocol::DIASPORA,
 423                                         $owner['uid'],
 424                                         Contact::SHARING
 425                                 );
 426                                 $relay_list = DBA::toArray($relay_list_stmt);
 427
 428                                 // Fetch the participation list
 429                                 // The function will ensure that there are no duplicates
 430                                 $relay_list = Diaspora::participantsForThread($target_id, $relay_list);
 431
 432                                 // Add the relay to the list, avoid duplicates.
 433                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 434                                 if (!$followup && !Item::isForumPost($target_item, $owner)) {
 435                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 436                                 }
 437                         }
 438
 439                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 440                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 441
 442                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 443
 444                         $r = array_merge($r2, $relay_list);
 445
 446                         if (DBA::isResult($r)) {
 447                                 foreach ($r as $rr) {
 448                                         if (!empty($rr['addr']) && ($rr['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $rr['addr']])) {
 449                                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $rr['url']]);
 450                                                 continue;
 451                                         }
 452
 453                                         if (!empty($rr['id']) && Contact::isArchived($rr['id'])) {
 454                                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $rr['url']]);
 455                                                 continue;
 456                                         }
 457
 458                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 459                                                 Logger::log('Skipping dropping for ' . $rr['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 460                                                 continue;
 461                                         }
 462
 463                                         if (self::skipDFRN($rr, $target_item, $parent, $thr_parent, $cmd)) {
 464                                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['id' => $target_id, 'url' => $rr['url']]);
 465                                                 continue;
 466                                         }
 467
 468                                         $conversants[] = $rr['id'];
 469
 470                                         Logger::info('Public delivery', ['target' => $target_id, 'guid' => $target_item["guid"], 'to' => $rr]);
 471
 472                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 473                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 474                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 475                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 476                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 477                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 478                                         } else {
 479                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 480                                         }
 481
 482                                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id'])) {
 483                                                 $delivery_queue_count++;
 484                                         }
 485                                 }
 486                         }
 487
 488                         $push_notify = true;
 489                 }
 490
 491                 // delivery loop
 492                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 493                         if (!empty($contact['addr']) && ($contact['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $contact['addr']])) {
 494                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $contact['url']]);
 495                                 continue;
 496                         }
 497
 498                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 499                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $contact['url']]);
 500                                 continue;
 501                         }
 502
 503                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 504                                 Logger::log('Skipping dropping for ' . $contact['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 505                                 continue;
 506                         }
 507
 508                         if (self::skipDFRN($contact, $target_item, $parent, $thr_parent, $cmd)) {
 509                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'url' => $contact['url']]);
 510                                 continue;
 511                         }
 512
 513                         // Don't deliver to Diaspora if it already had been done as batch delivery
 514                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 515                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 516                                 continue;
 517                         }
 518
 519                         // Don't deliver to folks who have already been delivered to
 520                         if (in_array($contact['id'], $conversants)) {
 521                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 522                                 continue;
 523                         }
 524
 525                         Logger::info('Delivery', ['id' => $target_id, 'to' => $contact]);
 526
 527                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 528                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 529                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 530                         if ($contact['network'] == Protocol::DIASPORA) {
 531                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 532                         } else {
 533                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 534                         }
 535
 536                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id'])) {
 537                                 $delivery_queue_count++;
 538                         }
 539                 }
 540                 DBA::close($delivery_contacts_stmt);
 541
 542                 $url_recipients = array_filter($url_recipients);
 543                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 544                 // They are especially used for notifications to OStatus users that don't follow us.
 545                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 546                         $slap = OStatus::salmon($target_item, $owner);
 547                         foreach ($url_recipients as $url) {
 548                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 549                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 550                                 $delivery_queue_count++;
 551                                 Salmon::slapper($owner, $url, $slap);
 552                                 ItemDeliveryData::incrementQueueDone($target_id, ItemDeliveryData::OSTATUS);
 553                         }
 554                 }
 555
 556                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 557                 if ($push_notify) {
 558                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 559
 560                         // Handling the pubsubhubbub requests
 561                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 562                 }
 563
 564                 if (!empty($target_item)) {
 565                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 566
 567                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 568
 569                         Hook::callAll('notifier_end', $target_item);
 570
 571                         // Workaround for pure connector posts
 572                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 573                                 if ($delivery_queue_count == 0) {
 574                                         ItemDeliveryData::incrementQueueDone($target_item['id']);
 575                                         $delivery_queue_count = 1;
 576                                 }
 577
 578                                 ItemDeliveryData::incrementQueueCount($target_item['id'], $delivery_queue_count);
 579                         }
 580                 }
 581
 582                 return;
 583         }
 584
 585         /**
 586          * Checks if the current delivery process needs to be transported via DFRN.
 587          *
 588          * @param array  $contact    Receiver of the post
 589          * @param array  $item       The post
 590          * @param array  $parent     The parent
 591          * @param array  $thr_parent The thread parent
 592          * @param string $cmd        Notifier command
 593          * @return bool
 594          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 595          * @throws \ImagickException
 596          */
 597         private static function skipDFRN($contact, $item, $parent, $thr_parent, $cmd)
 598         {
 599                 if (empty($parent['network'])) {
 600                         return false;
 601                 }
 602
 603                 // Don't skip when the starting post is delivered via Diaspora
 604                 if ($parent['network'] == Protocol::DIASPORA) {
 605                         return false;
 606                 }
 607
 608                 // Also don't skip when the direct thread parent was delivered via Diaspora
 609                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 610                         return false;
 611                 }
 612
 613                 // Use DFRN if we are on the same site
 614                 if (!empty($contact['url']) && Contact::isLocal($contact['url'])) {
 615                         return false;
 616                 }
 617
 618                 // Don't skip when author or owner don't have AP profiles
 619                 if ((!empty($item['author-link']) && empty(APContact::getByURL($item['author-link'], false))) || (!empty($item['owner-link']) && empty(APContact::getByURL($item['owner-link'], false)))) {
 620                         return false;
 621                 }
 622
 623                 // Don't skip DFRN delivery for these commands
 624                 if (in_array($cmd, [Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION, Delivery::POKE])) {
 625                         return false;
 626                 }
 627
 628                 // Skip DFRN when the item will be (forcefully) delivered via AP
 629                 if (Config::get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 630                         return true;
 631                 }
 632
 633                 // Skip DFRN delivery if the contact speaks ActivityPub
 634                 return in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && ($contact['protocol'] == Protocol::ACTIVITYPUB);
 635         }
 636
 637         /**
 638          * Checks if the current action is a deletion command of a account removal activity
 639          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 640          * These protocols do have a dedicated command for deleting a whole account.
 641          *
 642          * @param string $cmd     Notifier command
 643          * @param array  $owner   Sender of the post
 644          * @param string $network Receiver network
 645          * @return bool
 646          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 647          * @throws \ImagickException
 648          */
 649         private static function isRemovalActivity($cmd, $owner, $network)
 650         {
 651                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 652         }
 653
 654         /**
 655          * @param int    $self_user_id
 656          * @param int    $priority The priority the Notifier queue item was created with
 657          * @param string $created  The date the Notifier queue item was created on
 658          * @return bool
 659          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 660          * @throws \ImagickException
 661          */
 662         private static function notifySelfRemoval($self_user_id, $priority, $created)
 663         {
 664                 $owner = User::getOwnerDataById($self_user_id);
 665                 if (!$owner) {
 666                         return false;
 667                 }
 668
 669                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 670                 if (!DBA::isResult($contacts_stmt)) {
 671                         return false;
 672                 }
 673
 674                 while($contact = DBA::fetch($contacts_stmt)) {
 675                         Contact::terminateFriendship($owner, $contact, true);
 676                 }
 677                 DBA::close($contacts_stmt);
 678
 679                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 680                 foreach ($inboxes as $inbox) {
 681                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 682                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 683                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 684                 }
 685
 686                 return true;
 687         }
 688
 689         /**
 690          * @param string $cmd
 691          * @param array  $target_item
 692          * @param array  $parent
 693          * @param array  $thr_parent
 694          * @param int    $priority The priority the Notifier queue item was created with
 695          * @param string $created  The date the Notifier queue item was created on
 696          * @return int The number of delivery tasks created
 697          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 698          * @throws \ImagickException
 699          */
 700         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 701         {
 702                 // Don't deliver via AP when the starting post is delivered via Diaspora
 703                 if ($parent['network'] == Protocol::DIASPORA) {
 704                         return 0;
 705                 }
 706
 707                 // Also don't deliver  when the direct thread parent was delivered via Diaspora
 708                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 709                         return 0;
 710                 }
 711
 712                 $inboxes = [];
 713
 714                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 715
 716                 if ($target_item['origin']) {
 717                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 718                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 719                 } elseif (Item::isForumPost($target_item, $owner)) {
 720                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 721                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 722                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 723                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 724                         return 0;
 725                 } elseif ($parent['origin']) {
 726                         // Remote items are transmitted via the personal inboxes.
 727                         // Doing so ensures that the dedicated receiver will get the message.
 728                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 729                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 730                 }
 731
 732                 if (empty($inboxes)) {
 733                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 734                         return 0;
 735                 }
 736
 737                 // Fill the item cache
 738                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 739
 740                 $delivery_queue_count = 0;
 741
 742                 foreach ($inboxes as $inbox) {
 743                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 744
 745                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 746                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid)) {
 747                                 $delivery_queue_count++;
 748                         }
 749                 }
 750
 751                 return $delivery_queue_count;
 752         }
 753 }