include/notifier.php

   1 <?php
   2
   3 use Friendica\App;
   4 use Friendica\Core\Config;
   5
   6 require_once 'include/queue_fn.php';
   7 require_once 'include/html2plain.php';
   8 require_once 'include/probe.php';
   9 require_once 'include/diaspora.php';
  10 require_once 'include/ostatus.php';
  11 require_once 'include/salmon.php';
  12
  13 /*
  14  * This file was at one time responsible for doing all deliveries, but this caused
  15  * big problems when the process was killed or stalled during the delivery process.
  16  * It now invokes separate queues that are delivering via delivery.php and pubsubpublish.php.
  17  */
  18
  19 /*
  20  * The notifier is typically called with:
  21  *
  22  *              proc_run(PRIORITY_HIGH, "include/notifier.php", COMMAND, ITEM_ID);
  23  *
  24  * where COMMAND is one of the following:
  25  *
  26  *              activity                                (in diaspora.php, dfrn_confirm.php, profiles.php)
  27  *              comment-import                  (in diaspora.php, items.php)
  28  *              comment-new                             (in item.php)
  29  *              drop                                    (in diaspora.php, items.php, photos.php)
  30  *              edit_post                               (in item.php)
  31  *              event                                   (in events.php)
  32  *              expire                                  (in items.php)
  33  *              like                                    (in like.php, poke.php)
  34  *              mail                                    (in message.php)
  35  *              suggest                                 (in fsuggest.php)
  36  *              tag                                             (in photos.php, poke.php, tagger.php)
  37  *              tgroup                                  (in items.php)
  38  *              wall-new                                (in photos.php, item.php)
  39  *              removeme                                (in Contact.php)
  40  *              relocate                                (in uimport.php)
  41  *
  42  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  43  */
  44
  45
  46 function notifier_run(&$argv, &$argc){
  47         global $a;
  48
  49         require_once 'include/datetime.php';
  50         require_once 'include/items.php';
  51         require_once 'include/bbcode.php';
  52         require_once 'include/email.php';
  53
  54         if ($argc < 3) {
  55                 return;
  56         }
  57
  58         // Inherit the priority
  59         $queue = dba::select('workerqueue', array('priority'), array('pid' => getmypid()), array('limit' => 1));
  60         if (dbm::is_result($queue)) {
  61                 $priority = (int)$queue['priority'];
  62                 logger('inherited priority: '.$priority);
  63         } else {
  64                 // Normally this shouldn't happen.
  65                 $priority = PRIORITY_HIGH;
  66                 logger('no inherited priority! Something is wrong.');
  67         }
  68
  69         logger('notifier: invoked: ' . print_r($argv,true), LOGGER_DEBUG);
  70
  71         $cmd = $argv[1];
  72
  73         switch($cmd) {
  74                 case 'mail':
  75                 default:
  76                         $item_id = intval($argv[2]);
  77                         if (! $item_id) {
  78                                 return;
  79                         }
  80                         break;
  81         }
  82
  83         $expire = false;
  84         $mail = false;
  85         $fsuggest = false;
  86         $relocate = false;
  87         $top_level = false;
  88         $recipients = array();
  89         $url_recipients = array();
  90
  91         $normal_mode = true;
  92
  93         if ($cmd === 'mail') {
  94                 $normal_mode = false;
  95                 $mail = true;
  96                 $message = q("SELECT * FROM `mail` WHERE `id` = %d LIMIT 1",
  97                                 intval($item_id)
  98                 );
  99                 if (! count($message)) {
 100                         return;
 101                 }
 102                 $uid = $message[0]['uid'];
 103                 $recipients[] = $message[0]['contact-id'];
 104                 $item = $message[0];
 105
 106         } elseif ($cmd === 'expire') {
 107                 $normal_mode = false;
 108                 $expire = true;
 109                 $items = q("SELECT * FROM `item` WHERE `uid` = %d AND `wall` = 1
 110                         AND `deleted` = 1 AND `changed` > UTC_TIMESTAMP() - INTERVAL 10 MINUTE",
 111                         intval($item_id)
 112                 );
 113                 $uid = $item_id;
 114                 $item_id = 0;
 115                 if (! count($items)) {
 116                         return;
 117                 }
 118         } elseif ($cmd === 'suggest') {
 119                 $normal_mode = false;
 120                 $fsuggest = true;
 121
 122                 $suggest = q("SELECT * FROM `fsuggest` WHERE `id` = %d LIMIT 1",
 123                         intval($item_id)
 124                 );
 125                 if (! count($suggest)) {
 126                         return;
 127                 }
 128                 $uid = $suggest[0]['uid'];
 129                 $recipients[] = $suggest[0]['cid'];
 130                 $item = $suggest[0];
 131         } elseif ($cmd === 'removeme') {
 132                 $r = q("SELECT `contact`.*, `user`.`pubkey` AS `upubkey`, `user`.`prvkey` AS `uprvkey`,
 133                                 `user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
 134                                 `user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`, `user`.`guid`
 135                         FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 136                                 WHERE `contact`.`uid` = %d AND `contact`.`self` LIMIT 1",
 137                                 intval($item_id));
 138                 if (!$r)
 139                         return;
 140
 141                 $user = $r[0];
 142
 143                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` LIMIT 1", intval($item_id));
 144                 if (!$r)
 145                         return;
 146
 147                 $self = $r[0];
 148
 149                 $r = q("SELECT * FROM `contact` WHERE NOT `self` AND `uid` = %d", intval($item_id));
 150                 if (!$r) {
 151                         return;
 152                 }
 153                 require_once 'include/Contact.php';
 154                 foreach ($r as $contact) {
 155                         terminate_friendship($user, $self, $contact);
 156                 }
 157                 return;
 158         } elseif ($cmd === 'relocate') {
 159                 $normal_mode = false;
 160                 $relocate = true;
 161                 $uid = $item_id;
 162
 163                 $recipients_relocate = q("SELECT * FROM contact WHERE uid = %d  AND self = 0 AND network = '%s'" , intval($uid), NETWORK_DFRN);
 164         } else {
 165                 // find ancestors
 166                 $r = q("SELECT * FROM `item` WHERE `id` = %d AND visible = 1 AND moderated = 0 LIMIT 1",
 167                         intval($item_id)
 168                 );
 169
 170                 if ((! dbm::is_result($r)) || (! intval($r[0]['parent']))) {
 171                         return;
 172                 }
 173
 174                 $target_item = $r[0];
 175                 $parent_id = intval($r[0]['parent']);
 176                 $uid = $r[0]['uid'];
 177                 $updated = $r[0]['edited'];
 178
 179                 $items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
 180                         FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d AND visible = 1 AND moderated = 0 ORDER BY `id` ASC",
 181                         intval($parent_id)
 182                 );
 183
 184                 if (! count($items)) {
 185                         return;
 186                 }
 187
 188                 // avoid race condition with deleting entries
 189
 190                 if ($items[0]['deleted']) {
 191                         foreach ($items as $item) {
 192                                 $item['deleted'] = 1;
 193                         }
 194                 }
 195
 196                 if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 197                         logger('notifier: top level post');
 198                         $top_level = true;
 199                 }
 200
 201         }
 202
 203         $r = q("SELECT `contact`.*, `user`.`pubkey` AS `upubkey`, `user`.`prvkey` AS `uprvkey`,
 204                 `user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
 205                 `user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`
 206                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
 207                 WHERE `contact`.`uid` = %d AND `contact`.`self` = 1 LIMIT 1",
 208                 intval($uid)
 209         );
 210
 211         if (! dbm::is_result($r)) {
 212                 return;
 213         }
 214
 215         $owner = $r[0];
 216
 217         $walltowall = ((($top_level) && ($owner['id'] != $items[0]['contact-id'])) ? true : false);
 218
 219         $hub = get_config('system','huburl');
 220
 221         // Should the post be transmitted to Diaspora?
 222         $diaspora_delivery = true;
 223
 224         // If this is a public conversation, notify the feed hub
 225         $public_message = true;
 226
 227         // Do a PuSH
 228         $push_notify = false;
 229
 230         // fill this in with a single salmon slap if applicable
 231         $slap = '';
 232
 233         if (! ($mail || $fsuggest || $relocate)) {
 234
 235                 $slap = ostatus::salmon($target_item,$owner);
 236
 237                 require_once 'include/group.php';
 238
 239                 $parent = $items[0];
 240
 241                 $thr_parent = q("SELECT `network`, `author-link`, `owner-link` FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
 242                         dbesc($target_item["thr-parent"]), intval($target_item["uid"]));
 243
 244                 logger('GUID: '.$target_item["guid"].': Parent is '.$parent['network'].'. Thread parent is '.$thr_parent[0]['network'], LOGGER_DEBUG);
 245
 246                 // This is IMPORTANT!!!!
 247
 248                 // We will only send a "notify owner to relay" or followup message if the referenced post
 249                 // originated on our system by virtue of having our hostname somewhere
 250                 // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 251
 252                 // if $parent['wall'] == 1 we will already have the parent message in our array
 253                 // and we will relay the whole lot.
 254
 255                 // expire sends an entire group of expire messages and cannot be forwarded.
 256                 // However the conversation owner will be a part of the conversation and will
 257                 // be notified during this run.
 258                 // Other DFRN conversation members will be alerted during polled updates.
 259
 260
 261
 262                 // Diaspora members currently are not notified of expirations, and other networks have
 263                 // either limited or no ability to process deletions. We should at least fix Diaspora
 264                 // by stringing togther an array of retractions and sending them onward.
 265
 266
 267                 $localhost = str_replace('www.','',$a->get_hostname());
 268                 if (strpos($localhost,':')) {
 269                         $localhost = substr($localhost,0,strpos($localhost,':'));
 270                 }
 271                 /**
 272                  *
 273                  * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 274                  * have been known to cause runaway conditions which affected several servers, along with
 275                  * permissions issues.
 276                  *
 277                  */
 278
 279                 $relay_to_owner = false;
 280
 281                 if (!$top_level && ($parent['wall'] == 0) && !$expire && (stristr($target_item['uri'],$localhost))) {
 282                         $relay_to_owner = true;
 283                 }
 284
 285
 286                 if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
 287                         $relay_to_owner = true;
 288                 }
 289
 290                 // until the 'origin' flag has been in use for several months
 291                 // we will just use it as a fallback test
 292                 // later we will be able to use it as the primary test of whether or not to relay.
 293
 294                 if (! $target_item['origin']) {
 295                         $relay_to_owner = false;
 296                 }
 297                 if ($parent['origin']) {
 298                         $relay_to_owner = false;
 299                 }
 300                 if ($relay_to_owner) {
 301                         logger('notifier: followup '.$target_item["guid"], LOGGER_DEBUG);
 302                         // local followup to remote post
 303                         $followup = true;
 304                         $public_message = false; // not public
 305                         $conversant_str = dbesc($parent['contact-id']);
 306                         $recipients = array($parent['contact-id']);
 307                         $recipients_followup  = array($parent['contact-id']);
 308
 309                         //if (!$target_item['private'] && $target_item['wall'] &&
 310                         if (!$target_item['private'] &&
 311                                 (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 312                                         $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 313                                 $push_notify = true;
 314
 315                         if (($thr_parent && ($thr_parent[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
 316
 317                                 $push_notify = true;
 318
 319                                 if ($parent["network"] == NETWORK_OSTATUS) {
 320                                         // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 321                                         // Currently it is work at progress
 322                                         $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s' AND NOT `blocked` AND NOT `pending` AND NOT `archive`",
 323                                                 intval($uid),
 324                                                 dbesc(NETWORK_DFRN)
 325                                         );
 326                                         if (dbm::is_result($r)) {
 327                                                 foreach ($r as $rr) {
 328                                                         $recipients_followup[] = $rr['id'];
 329                                                 }
 330                                         }
 331                                 }
 332                         }
 333                         logger("Notify ".$target_item["guid"]." via PuSH: ".($push_notify?"Yes":"No"), LOGGER_DEBUG);
 334                 } else {
 335                         $followup = false;
 336
 337                         logger('Distributing directly '.$target_item["guid"], LOGGER_DEBUG);
 338
 339                         // don't send deletions onward for other people's stuff
 340
 341                         if ($target_item['deleted'] && (! intval($target_item['wall']))) {
 342                                 logger('notifier: ignoring delete notification for non-wall item');
 343                                 return;
 344                         }
 345
 346                         if ((strlen($parent['allow_cid']))
 347                                 || (strlen($parent['allow_gid']))
 348                                 || (strlen($parent['deny_cid']))
 349                                 || (strlen($parent['deny_gid']))) {
 350                                 $public_message = false; // private recipients, not public
 351                         }
 352
 353                         $allow_people = expand_acl($parent['allow_cid']);
 354                         $allow_groups = expand_groups(expand_acl($parent['allow_gid']),true);
 355                         $deny_people  = expand_acl($parent['deny_cid']);
 356                         $deny_groups  = expand_groups(expand_acl($parent['deny_gid']));
 357
 358                         // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 359                         // a delivery fork. private groups (forum_mode == 2) do not uplink
 360
 361                         if ((intval($parent['forum_mode']) == 1) && (! $top_level) && ($cmd !== 'uplink')) {
 362                                 proc_run($priority, 'include/notifier.php', 'uplink', $item_id);
 363                         }
 364
 365                         $conversants = array();
 366
 367                         foreach ($items as $item) {
 368                                 $recipients[] = $item['contact-id'];
 369                                 $conversants[] = $item['contact-id'];
 370                                 // pull out additional tagged people to notify (if public message)
 371                                 if ($public_message && strlen($item['inform'])) {
 372                                         $people = explode(',',$item['inform']);
 373                                         foreach ($people as $person) {
 374                                                 if (substr($person,0,4) === 'cid:') {
 375                                                         $recipients[] = intval(substr($person,4));
 376                                                         $conversants[] = intval(substr($person,4));
 377                                                 } else {
 378                                                         $url_recipients[] = substr($person,4);
 379                                                 }
 380                                         }
 381                                 }
 382                         }
 383
 384                         if (count($url_recipients))
 385                                 logger('notifier: '.$target_item["guid"].' url_recipients ' . print_r($url_recipients,true));
 386
 387                         $conversants = array_unique($conversants);
 388
 389
 390                         $recipients = array_unique(array_merge($recipients,$allow_people,$allow_groups));
 391                         $deny = array_unique(array_merge($deny_people,$deny_groups));
 392                         $recipients = array_diff($recipients,$deny);
 393
 394                         $conversant_str = dbesc(implode(', ',$conversants));
 395                 }
 396
 397                 // If the thread parent is OStatus then do some magic to distribute the messages.
 398                 // We have not only to look at the parent, since it could be a Friendica thread.
 399                 if (($thr_parent && ($thr_parent[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
 400
 401                         $diaspora_delivery = false;
 402
 403                         logger('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent[0]['author-link']." - Owner: ".$thr_parent[0]['owner-link'], LOGGER_DEBUG);
 404
 405                         // Send a salmon to the parent author
 406                         $r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
 407                                 dbesc(normalise_link($thr_parent[0]['author-link'])),
 408                                 intval($uid));
 409                         if (dbm::is_result($r)) {
 410                                 $probed_contact = $r[0];
 411                         } else {
 412                                 $probed_contact = probe_url($thr_parent[0]['author-link']);
 413                         }
 414
 415                         if ($probed_contact["notify"] != "") {
 416                                 logger('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 417                                 $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 418                         }
 419
 420                         // Send a salmon to the parent owner
 421                         $r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
 422                                 dbesc(normalise_link($thr_parent[0]['owner-link'])),
 423                                 intval($uid));
 424                         if (dbm::is_result($r)) {
 425                                 $probed_contact = $r[0];
 426                         } else {
 427                                 $probed_contact = probe_url($thr_parent[0]['owner-link']);
 428                         }
 429
 430                         if ($probed_contact["notify"] != "") {
 431                                 logger('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 432                                 $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 433                         }
 434
 435                         // Send a salmon notification to every person we mentioned in the post
 436                         $arr = explode(',',$target_item['tag']);
 437                         foreach ($arr as $x) {
 438                                 //logger('Checking tag '.$x, LOGGER_DEBUG);
 439                                 $matches = null;
 440                                 if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 441                                                 $probed_contact = probe_url($matches[1]);
 442                                         if ($probed_contact["notify"] != "") {
 443                                                 logger('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 444                                                 $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 445                                         }
 446                                 }
 447                         }
 448
 449                         // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 450                         $sql_extra = " AND `network` IN ('".NETWORK_OSTATUS."', '".NETWORK_DFRN."')";
 451                 } else {
 452                         $sql_extra = " AND `network` IN ('".NETWORK_OSTATUS."', '".NETWORK_DFRN."', '".NETWORK_DIASPORA."', '".NETWORK_MAIL."', '".NETWORK_MAIL2."')";
 453                 }
 454         } else {
 455                 $public_message = false;
 456         }
 457
 458         // If this is a public message and pubmail is set on the parent, include all your email contacts
 459
 460         $mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
 461
 462         if (! $mail_disabled) {
 463                 if ((! strlen($target_item['allow_cid'])) && (! strlen($target_item['allow_gid']))
 464                         && (! strlen($target_item['deny_cid'])) && (! strlen($target_item['deny_gid']))
 465                         && (intval($target_item['pubmail']))) {
 466                         $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s'",
 467                                 intval($uid),
 468                                 dbesc(NETWORK_MAIL)
 469                         );
 470                         if (dbm::is_result($r)) {
 471                                 foreach ($r as $rr) {
 472                                         $recipients[] = $rr['id'];
 473                                 }
 474                         }
 475                 }
 476         }
 477
 478         if ($followup) {
 479                 $recip_str = implode(', ', $recipients_followup);
 480         } else {
 481                 $recip_str = implode(', ', $recipients);
 482         }
 483         if ($relocate) {
 484                 $r = $recipients_relocate;
 485         } else {
 486                 $r = q("SELECT `id`, `url`, `network`, `self` FROM `contact`
 487                         WHERE `id` IN (%s) AND NOT `blocked` AND NOT `pending` AND NOT `archive`".$sql_extra,
 488                         dbesc($recip_str)
 489                 );
 490         }
 491
 492         // delivery loop
 493
 494         if (dbm::is_result($r)) {
 495                 foreach ($r as $contact) {
 496                         if ($contact['self']) {
 497                                 continue;
 498                         }
 499                         logger("Deliver ".$target_item["guid"]." to ".$contact['url']." via network ".$contact['network'], LOGGER_DEBUG);
 500
 501                         proc_run(array('priority' => $priority, 'dont_fork' => true), 'include/delivery.php', $cmd, $item_id, $contact['id']);
 502                 }
 503         }
 504
 505         // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 506         // They are especially used for notifications to OStatus users that don't follow us.
 507
 508         if ($slap && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
 509                 if (!get_config('system','dfrn_only')) {
 510                         foreach ($url_recipients as $url) {
 511                                 if ($url) {
 512                                         logger('notifier: urldelivery: ' . $url);
 513                                         $deliver_status = slapper($owner,$url,$slap);
 514                                         /// @TODO Redeliver/queue these items on failure, though there is no contact record
 515                                 }
 516                         }
 517                 }
 518         }
 519
 520
 521         if ($public_message) {
 522
 523                 $r0 = array();
 524                 $r1 = array();
 525
 526                 if ($diaspora_delivery) {
 527                         if (!$followup) {
 528                                 $r0 = Diaspora::relay_list();
 529                         }
 530
 531                         $r1 = q("SELECT `batch`, ANY_VALUE(`id`) AS `id`, ANY_VALUE(`name`) AS `name`, ANY_VALUE(`network`) AS `network`
 532                                 FROM `contact` WHERE `network` = '%s'
 533                                 AND `uid` = %d AND `rel` != %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` GROUP BY `batch` ORDER BY rand()",
 534                                 dbesc(NETWORK_DIASPORA),
 535                                 intval($owner['uid']),
 536                                 intval(CONTACT_IS_SHARING)
 537                         );
 538                 }
 539
 540                 $r2 = q("SELECT `id`, `name`,`network` FROM `contact`
 541                         WHERE `network` in ( '%s', '%s')  AND `uid` = %d AND NOT `blocked` AND NOT `pending` AND NOT `archive`
 542                         AND `rel` != %d order by rand() ",
 543                         dbesc(NETWORK_DFRN),
 544                         dbesc(NETWORK_MAIL2),
 545                         intval($owner['uid']),
 546                         intval(CONTACT_IS_SHARING)
 547                 );
 548
 549                 $r = array_merge($r2,$r1,$r0);
 550
 551                 if (dbm::is_result($r)) {
 552                         logger('pubdeliver '.$target_item["guid"].': '.print_r($r,true), LOGGER_DEBUG);
 553
 554                         foreach ($r as $rr) {
 555
 556                                 // except for Diaspora batch jobs
 557                                 // Don't deliver to folks who have already been delivered to
 558
 559                                 if (($rr['network'] !== NETWORK_DIASPORA) && (in_array($rr['id'],$conversants))) {
 560                                         logger('notifier: already delivered id=' . $rr['id']);
 561                                         continue;
 562                                 }
 563
 564                                 if ((! $mail) && (! $fsuggest) && (! $followup)) {
 565                                         logger('notifier: delivery agent: '.$rr['name'].' '.$rr['id'].' '.$rr['network'].' '.$target_item["guid"]);
 566                                         proc_run(array('priority' => $priority, 'dont_fork' => true), 'include/delivery.php', $cmd, $item_id, $rr['id']);
 567                                 }
 568                         }
 569                 }
 570
 571                 $push_notify = true;
 572
 573         }
 574
 575         // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 576         if ($push_notify && strlen($hub)) {
 577                 $hubs = explode(',', $hub);
 578                 if (count($hubs)) {
 579                         foreach ($hubs as $h) {
 580                                 $h = trim($h);
 581                                 if (! strlen($h)) {
 582                                         continue;
 583                                 }
 584
 585                                 if ($h === '[internal]') {
 586                                         // Set push flag for PuSH subscribers to this topic,
 587                                         // they will be notified in queue.php
 588                                         q("UPDATE `push_subscriber` SET `push` = 1 ".
 589                                           "WHERE `nickname` = '%s' AND `push` = 0", dbesc($owner['nickname']));
 590
 591                                         logger('Activating internal PuSH for item '.$item_id, LOGGER_DEBUG);
 592
 593                                 } else {
 594
 595                                         $params = 'hub.mode=publish&hub.url=' . urlencode( App::get_baseurl() . '/dfrn_poll/' . $owner['nickname'] );
 596                                         post_url($h,$params);
 597                                         logger('publish for item '.$item_id.' ' . $h . ' ' . $params . ' returned ' . $a->get_curl_code());
 598                                 }
 599                                 if (count($hubs) > 1) {
 600                                         sleep(7);                               // try and avoid multiple hubs responding at precisely the same time
 601                                 }
 602                         }
 603                 }
 604
 605                 // Handling the pubsubhubbub requests
 606                 proc_run(array('priority' => PRIORITY_HIGH, 'dont_fork' => true), 'include/pubsubpublish.php');
 607         }
 608
 609         logger('notifier: calling hooks', LOGGER_DEBUG);
 610
 611         if ($normal_mode) {
 612                 call_hooks('notifier_normal',$target_item);
 613         }
 614
 615         call_hooks('notifier_end',$target_item);
 616
 617         return;
 618 }