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\DI;
  15 use Friendica\Model\APContact;
  16 use Friendica\Model\Contact;
  17 use Friendica\Model\Conversation;
  18 use Friendica\Model\Group;
  19 use Friendica\Model\Item;
  20 use Friendica\Model\ItemDeliveryData;
  21 use Friendica\Model\PushSubscriber;
  22 use Friendica\Model\User;
  23 use Friendica\Network\Probe;
  24 use Friendica\Protocol\ActivityPub;
  25 use Friendica\Protocol\Diaspora;
  26 use Friendica\Protocol\OStatus;
  27 use Friendica\Protocol\Salmon;
  28 use Friendica\Util\ACLFormatter;
  29
  30 require_once 'include/items.php';
  31
  32 /*
  33  * The notifier is typically called with:
  34  *
  35  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  36  *
  37  * where COMMAND is one of the constants that are defined in Worker/Delivery.php
  38  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  39  */
  40
  41 class Notifier
  42 {
  43         public static function execute($cmd, $target_id)
  44         {
  45                 $a = DI::app();
  46
  47                 Logger::info('Invoked', ['cmd' => $cmd, 'target' => $target_id]);
  48
  49                 $top_level = false;
  50                 $recipients = [];
  51                 $url_recipients = [];
  52
  53                 $delivery_contacts_stmt = null;
  54                 $target_item = [];
  55                 $parent = [];
  56                 $thr_parent = [];
  57                 $items = [];
  58                 $delivery_queue_count = 0;
  59
  60                 if ($cmd == Delivery::MAIL) {
  61                         $message = DBA::selectFirst('mail', ['uid', 'contact-id'], ['id' => $target_id]);
  62                         if (!DBA::isResult($message)) {
  63                                 return;
  64                         }
  65                         $uid = $message['uid'];
  66                         $recipients[] = $message['contact-id'];
  67
  68                         $mail = ActivityPub\Transmitter::ItemArrayFromMail($target_id);
  69                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($mail, $uid, true);
  70                         foreach ($inboxes as $inbox) {
  71                                 Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'target' => $target_id, 'inbox' => $inbox]);
  72                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  73                                         'APDelivery', $cmd, $target_id, $inbox, $uid);
  74                         }
  75                 } elseif ($cmd == Delivery::SUGGESTION) {
  76                         $suggest = DBA::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $target_id]);
  77                         if (!DBA::isResult($suggest)) {
  78                                 return;
  79                         }
  80                         $uid = $suggest['uid'];
  81                         $recipients[] = $suggest['cid'];
  82                 } elseif ($cmd == Delivery::REMOVAL) {
  83                         return self::notifySelfRemoval($target_id, $a->queue['priority'], $a->queue['created']);
  84                 } elseif ($cmd == Delivery::RELOCATION) {
  85                         $uid = $target_id;
  86
  87                         $condition = ['uid' => $target_id, 'self' => false, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
  88                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'url', 'addr', 'network', 'protocol', 'batch'], $condition);
  89                 } else {
  90                         // find ancestors
  91                         $condition = ['id' => $target_id, 'visible' => true, 'moderated' => false];
  92                         $target_item = Item::selectFirst([], $condition);
  93
  94                         if (!DBA::isResult($target_item) || !intval($target_item['parent'])) {
  95                                 Logger::info('No target item', ['cmd' => $cmd, 'target' => $target_id]);
  96                                 return;
  97                         }
  98
  99                         if (!empty($target_item['contact-uid'])) {
 100                                 $uid = $target_item['contact-uid'];
 101                         } elseif (!empty($target_item['uid'])) {
 102                                 $uid = $target_item['uid'];
 103                         } else {
 104                                 Logger::info('Only public users, quitting', ['target' => $target_id]);
 105                                 return;
 106                         }
 107
 108                         $condition = ['parent' => $target_item['parent'], 'visible' => true, 'moderated' => false];
 109                         $params = ['order' => ['id']];
 110                         $items_stmt = Item::select([], $condition, $params);
 111                         if (!DBA::isResult($items_stmt)) {
 112                                 Logger::info('No item found', ['cmd' => $cmd, 'target' => $target_id]);
 113                                 return;
 114                         }
 115
 116                         $items = Item::inArray($items_stmt);
 117
 118                         // avoid race condition with deleting entries
 119                         if ($items[0]['deleted']) {
 120                                 foreach ($items as $item) {
 121                                         $item['deleted'] = 1;
 122                                 }
 123                         }
 124
 125                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 126                                 Logger::info('Top level post', ['target' => $target_id]);
 127                                 $top_level = true;
 128                         }
 129                 }
 130
 131                 $owner = User::getOwnerDataById($uid);
 132                 if (!$owner) {
 133                         Logger::info('Owner not found', ['cmd' => $cmd, 'target' => $target_id]);
 134                         return;
 135                 }
 136
 137                 // Should the post be transmitted to Diaspora?
 138                 $diaspora_delivery = true;
 139
 140                 // If this is a public conversation, notify the feed hub
 141                 $public_message = true;
 142
 143                 // Do a PuSH
 144                 $push_notify = false;
 145
 146                 // Deliver directly to a forum, don't PuSH
 147                 $direct_forum_delivery = false;
 148
 149                 $followup = false;
 150                 $recipients_followup = [];
 151
 152                 if (!empty($target_item) && !empty($items)) {
 153                         $parent = $items[0];
 154
 155                         $fields = ['network', 'author-id', 'author-link', 'owner-id'];
 156                         $condition = ['uri' => $target_item["thr-parent"], 'uid' => $target_item["uid"]];
 157                         $thr_parent = Item::selectFirst($fields, $condition);
 158                         if (empty($thr_parent)) {
 159                                 $thr_parent = $parent;
 160                         }
 161
 162                         Logger::log('GUID: ' . $target_item["guid"] . ': Parent is ' . $parent['network'] . '. Thread parent is ' . $thr_parent['network'], Logger::DEBUG);
 163
 164                         if (!self::isRemovalActivity($cmd, $owner, Protocol::ACTIVITYPUB)) {
 165                                 $delivery_queue_count += self::activityPubDelivery($cmd, $target_item, $parent, $thr_parent, $a->queue['priority'], $a->queue['created'], $owner);
 166                         }
 167
 168                         // Only deliver threaded replies (comment to a comment) to Diaspora
 169                         // when the original comment author does support the Diaspora protocol.
 170                         if ($target_item['parent-uri'] != $target_item['thr-parent']) {
 171                                 $diaspora_delivery = Diaspora::isSupportedByContactUrl($thr_parent['author-link']);
 172                                 Logger::info('Threaded comment', ['diaspora_delivery' => (int)$diaspora_delivery]);
 173                         }
 174
 175                         // This is IMPORTANT!!!!
 176
 177                         // We will only send a "notify owner to relay" or followup message if the referenced post
 178                         // originated on our system by virtue of having our hostname somewhere
 179                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 180
 181                         // if $parent['wall'] == 1 we will already have the parent message in our array
 182                         // and we will relay the whole lot.
 183
 184                         $localhost = str_replace('www.','',$a->getHostName());
 185                         if (strpos($localhost,':')) {
 186                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 187                         }
 188                         /**
 189                          *
 190                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 191                          * have been known to cause runaway conditions which affected several servers, along with
 192                          * permissions issues.
 193                          *
 194                          */
 195
 196                         $relay_to_owner = false;
 197
 198                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 199                                 $relay_to_owner = true;
 200                         }
 201
 202                         if (($cmd === Delivery::UPLINK) && (intval($parent['forum_mode']) == 1) && !$top_level) {
 203                                 $relay_to_owner = true;
 204                         }
 205
 206                         // until the 'origin' flag has been in use for several months
 207                         // we will just use it as a fallback test
 208                         // later we will be able to use it as the primary test of whether or not to relay.
 209
 210                         if (!$target_item['origin']) {
 211                                 $relay_to_owner = false;
 212                         }
 213                         if ($parent['origin']) {
 214                                 $relay_to_owner = false;
 215                         }
 216
 217                         // Special treatment for forum posts
 218                         if (Item::isForumPost($target_item, $owner)) {
 219                                 $relay_to_owner = true;
 220                                 $direct_forum_delivery = true;
 221                         }
 222
 223                         // Avoid that comments in a forum thread are sent to OStatus
 224                         if (Item::isForumPost($parent, $owner)) {
 225                                 $direct_forum_delivery = true;
 226                         }
 227
 228                         if ($relay_to_owner) {
 229                                 // local followup to remote post
 230                                 $followup = true;
 231                                 $public_message = false; // not public
 232                                 $recipients = [$parent['contact-id']];
 233                                 $recipients_followup  = [$parent['contact-id']];
 234
 235                                 Logger::info('Followup', ['target' => $target_id, 'guid' => $target_item['guid'], 'to' => $parent['contact-id']]);
 236
 237                                 //if (!$target_item['private'] && $target_item['wall'] &&
 238                                 if (!$target_item['private'] &&
 239                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 240                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 241                                         $push_notify = true;
 242
 243                                 if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 244                                         $push_notify = true;
 245
 246                                         if ($parent["network"] == Protocol::OSTATUS) {
 247                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 248                                                 // Currently it is work at progress
 249                                                 $condition = ['uid' => $uid, 'network' => Protocol::DFRN, 'blocked' => false, 'pending' => false, 'archive' => false];
 250                                                 $followup_contacts_stmt = DBA::select('contact', ['id'], $condition);
 251                                                 while($followup_contact = DBA::fetch($followup_contacts_stmt)) {
 252                                                         $recipients_followup[] = $followup_contact['id'];
 253                                                 }
 254                                                 DBA::close($followup_contacts_stmt);
 255                                         }
 256                                 }
 257
 258                                 if ($direct_forum_delivery) {
 259                                         $push_notify = false;
 260                                 }
 261
 262                                 Logger::log('Notify ' . $target_item["guid"] .' via PuSH: ' . ($push_notify ? "Yes":"No"), Logger::DEBUG);
 263                         } else {
 264                                 $followup = false;
 265
 266                                 Logger::info('Distributing directly', ['target' => $target_id, 'guid' => $target_item['guid']]);
 267
 268                                 // don't send deletions onward for other people's stuff
 269
 270                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 271                                         Logger::log('Ignoring delete notification for non-wall item');
 272                                         return;
 273                                 }
 274
 275                                 if (strlen($parent['allow_cid'])
 276                                         || strlen($parent['allow_gid'])
 277                                         || strlen($parent['deny_cid'])
 278                                         || strlen($parent['deny_gid'])) {
 279                                         $public_message = false; // private recipients, not public
 280                                 }
 281
 282                                 /** @var ACLFormatter $aclFormatter */
 283                                 $aclFormatter = BaseObject::getClass(ACLFormatter::class);
 284
 285                                 $allow_people = $aclFormatter->expand($parent['allow_cid']);
 286                                 $allow_groups = Group::expand($uid, $aclFormatter->expand($parent['allow_gid']),true);
 287                                 $deny_people  = $aclFormatter->expand($parent['deny_cid']);
 288                                 $deny_groups  = Group::expand($uid, $aclFormatter->expand($parent['deny_gid']));
 289
 290                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 291                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 292
 293                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== Delivery::UPLINK)) {
 294                                         Worker::add($a->queue['priority'], 'Notifier', Delivery::UPLINK, $target_id);
 295                                 }
 296
 297                                 foreach ($items as $item) {
 298                                         $recipients[] = $item['contact-id'];
 299                                         // pull out additional tagged people to notify (if public message)
 300                                         if ($public_message && strlen($item['inform'])) {
 301                                                 $people = explode(',',$item['inform']);
 302                                                 foreach ($people as $person) {
 303                                                         if (substr($person,0,4) === 'cid:') {
 304                                                                 $recipients[] = intval(substr($person,4));
 305                                                         } else {
 306                                                                 $url_recipients[] = substr($person,4);
 307                                                         }
 308                                                 }
 309                                         }
 310                                 }
 311
 312                                 if (count($url_recipients)) {
 313                                         Logger::notice('Deliver', ['target' => $target_id, 'guid' => $target_item['guid'], 'recipients' => $url_recipients]);
 314                                 }
 315
 316                                 $recipients = array_unique(array_merge($recipients, $allow_people, $allow_groups));
 317                                 $deny = array_unique(array_merge($deny_people, $deny_groups));
 318                                 $recipients = array_diff($recipients, $deny);
 319
 320                                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 321                                 if (
 322                                         function_exists('imap_open')
 323                                         && !Config::get('system','imap_disabled')
 324                                         && $public_message
 325                                         && intval($target_item['pubmail'])
 326                                 ) {
 327                                         $mail_contacts_stmt = DBA::select('contact', ['id'], ['uid' => $uid, 'network' => Protocol::MAIL]);
 328                                         while ($mail_contact = DBA::fetch($mail_contacts_stmt)) {
 329                                                 $recipients[] = $mail_contact['id'];
 330                                         }
 331                                         DBA::close($mail_contacts_stmt);
 332                                 }
 333                         }
 334
 335                         // If the thread parent is OStatus then do some magic to distribute the messages.
 336                         // We have not only to look at the parent, since it could be a Friendica thread.
 337                         if (($thr_parent && ($thr_parent['network'] == Protocol::OSTATUS)) || ($parent['network'] == Protocol::OSTATUS)) {
 338                                 $diaspora_delivery = false;
 339
 340                                 Logger::log('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent['author-id']." - Owner: ".$thr_parent['owner-id'], Logger::DEBUG);
 341
 342                                 // Send a salmon to the parent author
 343                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['author-id']]);
 344                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 345                                         Logger::log('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 346                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 347                                 }
 348
 349                                 // Send a salmon to the parent owner
 350                                 $probed_contact = DBA::selectFirst('contact', ['url', 'notify'], ['id' => $thr_parent['owner-id']]);
 351                                 if (DBA::isResult($probed_contact) && !empty($probed_contact["notify"])) {
 352                                         Logger::log('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 353                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 354                                 }
 355
 356                                 // Send a salmon notification to every person we mentioned in the post
 357                                 $arr = explode(',',$target_item['tag']);
 358                                 foreach ($arr as $x) {
 359                                         //Logger::log('Checking tag '.$x, Logger::DEBUG);
 360                                         $matches = null;
 361                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 362                                                         $probed_contact = Probe::uri($matches[1]);
 363                                                 if ($probed_contact["notify"] != "") {
 364                                                         Logger::log('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 365                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 366                                                 }
 367                                         }
 368                                 }
 369
 370                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 371                                 $networks = [Protocol::DFRN];
 372                         } elseif ($diaspora_delivery) {
 373                                 $networks = [Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 374                                 if (($parent['network'] == Protocol::DIASPORA) || ($thr_parent['network'] == Protocol::DIASPORA)) {
 375                                         Logger::info('Add AP contacts', ['target' => $target_id, 'guid' => $target_item['guid']]);
 376                                         $networks[] = Protocol::ACTIVITYPUB;
 377                                 }
 378                         } else {
 379                                 $networks = [Protocol::DFRN, Protocol::MAIL];
 380                         }
 381                 } else {
 382                         $public_message = false;
 383                 }
 384
 385                 if (empty($delivery_contacts_stmt)) {
 386                         if ($followup) {
 387                                 $recipients = $recipients_followup;
 388                         }
 389                         $condition = ['id' => $recipients, 'self' => false,
 390                                 'blocked' => false, 'pending' => false, 'archive' => false];
 391                         if (!empty($networks)) {
 392                                 $condition['network'] = $networks;
 393                         }
 394                         $delivery_contacts_stmt = DBA::select('contact', ['id', 'addr', 'url', 'network', 'protocol', 'batch'], $condition);
 395                 }
 396
 397                 $conversants = [];
 398                 $batch_delivery = false;
 399
 400                 if ($public_message && !in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 401                         $relay_list = [];
 402
 403                         if ($diaspora_delivery) {
 404                                 $batch_delivery = true;
 405
 406                                 $relay_list_stmt = DBA::p(
 407                                         "SELECT
 408                                                 `batch`,
 409                                                 ANY_VALUE(`id`) AS `id`,
 410                                                 ANY_VALUE(`url`) AS `url`,
 411                                                 ANY_VALUE(`name`) AS `name`,
 412                                                 ANY_VALUE(`network`) AS `network`,
 413                                                 ANY_VALUE(`protocol`) AS `protocol`
 414                                         FROM `contact`
 415                                         WHERE `network` = ?
 416                                         AND `batch` != ''
 417                                         AND `uid` = ?
 418                                         AND `rel` != ?
 419                                         AND NOT `blocked`
 420                                         AND NOT `pending`
 421                                         AND NOT `archive`
 422                                         GROUP BY `batch`",
 423                                         Protocol::DIASPORA,
 424                                         $owner['uid'],
 425                                         Contact::SHARING
 426                                 );
 427                                 $relay_list = DBA::toArray($relay_list_stmt);
 428
 429                                 // Fetch the participation list
 430                                 // The function will ensure that there are no duplicates
 431                                 $relay_list = Diaspora::participantsForThread($target_id, $relay_list);
 432
 433                                 // Add the relay to the list, avoid duplicates.
 434                                 // Don't send community posts to the relay. Forum posts via the Diaspora protocol are looking ugly.
 435                                 if (!$followup && !Item::isForumPost($target_item, $owner)) {
 436                                         $relay_list = Diaspora::relayList($target_id, $relay_list);
 437                                 }
 438                         }
 439
 440                         $condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 441                                 'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 442
 443                         $r2 = DBA::toArray(DBA::select('contact', ['id', 'url', 'addr', 'name', 'network', 'protocol'], $condition));
 444
 445                         $r = array_merge($r2, $relay_list);
 446
 447                         if (DBA::isResult($r)) {
 448                                 foreach ($r as $rr) {
 449                                         if (!empty($rr['addr']) && ($rr['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $rr['addr']])) {
 450                                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $rr['url']]);
 451                                                 continue;
 452                                         }
 453
 454                                         if (!empty($rr['id']) && Contact::isArchived($rr['id'])) {
 455                                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $rr['url']]);
 456                                                 continue;
 457                                         }
 458
 459                                         if (self::isRemovalActivity($cmd, $owner, $rr['network'])) {
 460                                                 Logger::log('Skipping dropping for ' . $rr['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 461                                                 continue;
 462                                         }
 463
 464                                         if (self::skipDFRN($rr, $target_item, $parent, $thr_parent, $cmd)) {
 465                                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['id' => $target_id, 'url' => $rr['url']]);
 466                                                 continue;
 467                                         }
 468
 469                                         $conversants[] = $rr['id'];
 470
 471                                         Logger::info('Public delivery', ['target' => $target_id, 'guid' => $target_item["guid"], 'to' => $rr]);
 472
 473                                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 474                                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 475                                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 476                                         // This is only important for high and medium priority tasks and not for Low priority jobs like deletions.
 477                                         if (($rr['network'] == Protocol::DIASPORA) && in_array($a->queue['priority'], [PRIORITY_HIGH, PRIORITY_MEDIUM])) {
 478                                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 479                                         } else {
 480                                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 481                                         }
 482
 483                                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$rr['id'])) {
 484                                                 $delivery_queue_count++;
 485                                         }
 486                                 }
 487                         }
 488
 489                         $push_notify = true;
 490                 }
 491
 492                 // delivery loop
 493                 while ($contact = DBA::fetch($delivery_contacts_stmt)) {
 494                         if (!empty($contact['addr']) && ($contact['network'] == Protocol::ACTIVITYPUB) && !DBA::exists('fcontact', ['addr' => $contact['addr']])) {
 495                                 Logger::info('Contact is AP omly', ['target' => $target_id, 'contact' => $contact['url']]);
 496                                 continue;
 497                         }
 498
 499                         if (!empty($contact['id']) && Contact::isArchived($contact['id'])) {
 500                                 Logger::info('Contact is archived', ['target' => $target_id, 'contact' => $contact['url']]);
 501                                 continue;
 502                         }
 503
 504                         if (self::isRemovalActivity($cmd, $owner, $contact['network'])) {
 505                                 Logger::log('Skipping dropping for ' . $contact['url'] . ' since the network supports account removal commands.', Logger::DEBUG);
 506                                 continue;
 507                         }
 508
 509                         if (self::skipDFRN($contact, $target_item, $parent, $thr_parent, $cmd)) {
 510                                 Logger::info('Contact can be delivered via AP, so skip delivery via legacy DFRN/Diaspora', ['target' => $target_id, 'url' => $contact['url']]);
 511                                 continue;
 512                         }
 513
 514                         // Don't deliver to Diaspora if it already had been done as batch delivery
 515                         if (($contact['network'] == Protocol::DIASPORA) && $batch_delivery) {
 516                                 Logger::log('Already delivered  id ' . $target_id . ' via batch to ' . json_encode($contact), Logger::DEBUG);
 517                                 continue;
 518                         }
 519
 520                         // Don't deliver to folks who have already been delivered to
 521                         if (in_array($contact['id'], $conversants)) {
 522                                 Logger::log('Already delivered id ' . $target_id. ' to ' . json_encode($contact), Logger::DEBUG);
 523                                 continue;
 524                         }
 525
 526                         Logger::info('Delivery', ['id' => $target_id, 'to' => $contact]);
 527
 528                         // Ensure that posts with our own protocol arrives before Diaspora posts arrive.
 529                         // Situation is that sometimes Friendica servers receive Friendica posts over the Diaspora protocol first.
 530                         // The conversion in Markdown reduces the formatting, so these posts should arrive after the Friendica posts.
 531                         if ($contact['network'] == Protocol::DIASPORA) {
 532                                 $deliver_options = ['priority' => $a->queue['priority'], 'dont_fork' => true];
 533                         } else {
 534                                 $deliver_options = ['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true];
 535                         }
 536
 537                         if (Worker::add($deliver_options, 'Delivery', $cmd, $target_id, (int)$contact['id'])) {
 538                                 $delivery_queue_count++;
 539                         }
 540                 }
 541                 DBA::close($delivery_contacts_stmt);
 542
 543                 $url_recipients = array_filter($url_recipients);
 544                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 545                 // They are especially used for notifications to OStatus users that don't follow us.
 546                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && !empty($target_item)) {
 547                         $slap = OStatus::salmon($target_item, $owner);
 548                         foreach ($url_recipients as $url) {
 549                                 Logger::log('Salmon delivery of item ' . $target_id . ' to ' . $url);
 550                                 /// @TODO Redeliver/queue these items on failure, though there is no contact record
 551                                 $delivery_queue_count++;
 552                                 Salmon::slapper($owner, $url, $slap);
 553                                 ItemDeliveryData::incrementQueueDone($target_id, ItemDeliveryData::OSTATUS);
 554                         }
 555                 }
 556
 557                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 558                 if ($push_notify) {
 559                         Logger::log('Activating internal PuSH for item '.$target_id, Logger::DEBUG);
 560
 561                         // Handling the pubsubhubbub requests
 562                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 563                 }
 564
 565                 if (!empty($target_item)) {
 566                         Logger::log('Calling hooks for ' . $cmd . ' ' . $target_id, Logger::DEBUG);
 567
 568                         Hook::fork($a->queue['priority'], 'notifier_normal', $target_item);
 569
 570                         Hook::callAll('notifier_end', $target_item);
 571
 572                         // Workaround for pure connector posts
 573                         if (in_array($cmd, [Delivery::POST, Delivery::POKE])) {
 574                                 if ($delivery_queue_count == 0) {
 575                                         ItemDeliveryData::incrementQueueDone($target_item['id']);
 576                                         $delivery_queue_count = 1;
 577                                 }
 578
 579                                 ItemDeliveryData::incrementQueueCount($target_item['id'], $delivery_queue_count);
 580                         }
 581                 }
 582
 583                 return;
 584         }
 585
 586         /**
 587          * Checks if the current delivery process needs to be transported via DFRN.
 588          *
 589          * @param array  $contact    Receiver of the post
 590          * @param array  $item       The post
 591          * @param array  $parent     The parent
 592          * @param array  $thr_parent The thread parent
 593          * @param string $cmd        Notifier command
 594          * @return bool
 595          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 596          * @throws \ImagickException
 597          */
 598         private static function skipDFRN($contact, $item, $parent, $thr_parent, $cmd)
 599         {
 600                 if (empty($parent['network'])) {
 601                         return false;
 602                 }
 603
 604                 // Don't skip when the starting post is delivered via Diaspora
 605                 if ($parent['network'] == Protocol::DIASPORA) {
 606                         return false;
 607                 }
 608
 609                 // Also don't skip when the direct thread parent was delivered via Diaspora
 610                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 611                         return false;
 612                 }
 613
 614                 // Use DFRN if we are on the same site
 615                 if (!empty($contact['url']) && Contact::isLocal($contact['url'])) {
 616                         return false;
 617                 }
 618
 619                 // Don't skip when author or owner don't have AP profiles
 620                 if ((!empty($item['author-link']) && empty(APContact::getByURL($item['author-link'], false))) || (!empty($item['owner-link']) && empty(APContact::getByURL($item['owner-link'], false)))) {
 621                         return false;
 622                 }
 623
 624                 // Don't skip DFRN delivery for these commands
 625                 if (in_array($cmd, [Delivery::SUGGESTION, Delivery::REMOVAL, Delivery::RELOCATION, Delivery::POKE])) {
 626                         return false;
 627                 }
 628
 629                 // We deliver reshares via AP whenever possible
 630                 if (ActivityPub\Transmitter::isAnnounce($item)) {
 631                         return true;
 632                 }
 633
 634                 // Skip DFRN when the item will be (forcefully) delivered via AP
 635                 if (Config::get('debug', 'total_ap_delivery') && ($contact['network'] == Protocol::DFRN) && !empty(APContact::getByURL($contact['url'], false))) {
 636                         return true;
 637                 }
 638
 639                 // Skip DFRN delivery if the contact speaks ActivityPub
 640                 return in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && ($contact['protocol'] == Protocol::ACTIVITYPUB);
 641         }
 642
 643         /**
 644          * Checks if the current action is a deletion command of a account removal activity
 645          * For Diaspora and ActivityPub we don't need to send single item deletion calls.
 646          * These protocols do have a dedicated command for deleting a whole account.
 647          *
 648          * @param string $cmd     Notifier command
 649          * @param array  $owner   Sender of the post
 650          * @param string $network Receiver network
 651          * @return bool
 652          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 653          * @throws \ImagickException
 654          */
 655         private static function isRemovalActivity($cmd, $owner, $network)
 656         {
 657                 return ($cmd == Delivery::DELETION) && $owner['account_removed'] && in_array($network, [Protocol::ACTIVITYPUB, Protocol::DIASPORA]);
 658         }
 659
 660         /**
 661          * @param int    $self_user_id
 662          * @param int    $priority The priority the Notifier queue item was created with
 663          * @param string $created  The date the Notifier queue item was created on
 664          * @return bool
 665          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 666          * @throws \ImagickException
 667          */
 668         private static function notifySelfRemoval($self_user_id, $priority, $created)
 669         {
 670                 $owner = User::getOwnerDataById($self_user_id);
 671                 if (!$owner) {
 672                         return false;
 673                 }
 674
 675                 $contacts_stmt = DBA::select('contact', [], ['self' => false, 'uid' => $self_user_id]);
 676                 if (!DBA::isResult($contacts_stmt)) {
 677                         return false;
 678                 }
 679
 680                 while($contact = DBA::fetch($contacts_stmt)) {
 681                         Contact::terminateFriendship($owner, $contact, true);
 682                 }
 683                 DBA::close($contacts_stmt);
 684
 685                 $inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser(0);
 686                 foreach ($inboxes as $inbox) {
 687                         Logger::info('Account removal via ActivityPub', ['uid' => $self_user_id, 'inbox' => $inbox]);
 688                         Worker::add(['priority' => PRIORITY_NEGLIGIBLE, 'created' => $created, 'dont_fork' => true],
 689                                 'APDelivery', Delivery::REMOVAL, '', $inbox, $self_user_id);
 690                 }
 691
 692                 return true;
 693         }
 694
 695         /**
 696          * @param string $cmd
 697          * @param array  $target_item
 698          * @param array  $parent
 699          * @param array  $thr_parent
 700          * @param int    $priority The priority the Notifier queue item was created with
 701          * @param string $created  The date the Notifier queue item was created on
 702          * @return int The number of delivery tasks created
 703          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 704          * @throws \ImagickException
 705          */
 706         private static function activityPubDelivery($cmd, array $target_item, array $parent, array $thr_parent, $priority, $created, $owner)
 707         {
 708                 // Don't deliver via AP when the starting post is delivered via Diaspora
 709                 if ($parent['network'] == Protocol::DIASPORA) {
 710                         return 0;
 711                 }
 712
 713                 // Also don't deliver  when the direct thread parent was delivered via Diaspora
 714                 if ($thr_parent['network'] == Protocol::DIASPORA) {
 715                         return 0;
 716                 }
 717
 718                 $inboxes = [];
 719
 720                 $uid = $target_item['contact-uid'] ?: $target_item['uid'];
 721
 722                 if ($target_item['origin']) {
 723                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid);
 724                         Logger::log('Origin item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 725                 } elseif (Item::isForumPost($target_item, $owner)) {
 726                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($target_item, $uid, false, 0, true);
 727                         Logger::log('Forum item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 728                 } elseif (!DBA::exists('conversation', ['item-uri' => $target_item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB])) {
 729                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' is no AP post. It will not be distributed.', Logger::DEBUG);
 730                         return 0;
 731                 } elseif ($parent['origin']) {
 732                         // Remote items are transmitted via the personal inboxes.
 733                         // Doing so ensures that the dedicated receiver will get the message.
 734                         $inboxes = ActivityPub\Transmitter::fetchTargetInboxes($parent, $uid, true, $target_item['id']);
 735                         Logger::log('Remote item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . ' will be distributed.', Logger::DEBUG);
 736                 }
 737
 738                 if (empty($inboxes)) {
 739                         Logger::log('No inboxes found for item ' . $target_item['id'] . ' with URL ' . $target_item['uri'] . '. It will not be distributed.', Logger::DEBUG);
 740                         return 0;
 741                 }
 742
 743                 // Fill the item cache
 744                 ActivityPub\Transmitter::createCachedActivityFromItem($target_item['id'], true);
 745
 746                 $delivery_queue_count = 0;
 747
 748                 foreach ($inboxes as $inbox) {
 749                         Logger::info('Delivery via ActivityPub', ['cmd' => $cmd, 'id' => $target_item['id'], 'inbox' => $inbox]);
 750
 751                         if (Worker::add(['priority' => $priority, 'created' => $created, 'dont_fork' => true],
 752                                         'APDelivery', $cmd, $target_item['id'], $inbox, $uid)) {
 753                                 $delivery_queue_count++;
 754                         }
 755                 }
 756
 757                 return $delivery_queue_count;
 758         }
 759 }