src/Worker/Notifier.php

   1 <?php
   2 /**
   3  * @file src/Worker/Notifier.php
   4  */
   5 namespace Friendica\Worker;
   6
   7 use Friendica\Core\Addon;
   8 use Friendica\Core\Config;
   9 use Friendica\Core\Worker;
  10 use Friendica\Database\DBM;
  11 use Friendica\Model\Contact;
  12 use Friendica\Model\Group;
  13 use Friendica\Model\User;
  14 use Friendica\Model\PushSubscriber;
  15 use Friendica\Network\Probe;
  16 use Friendica\Protocol\Diaspora;
  17 use Friendica\Protocol\OStatus;
  18 use Friendica\Protocol\Salmon;
  19 use Friendica\Worker\Delivery;
  20 use dba;
  21
  22 require_once 'include/dba.php';
  23 require_once 'include/items.php';
  24
  25 /*
  26  * The notifier is typically called with:
  27  *
  28  *              Worker::add(PRIORITY_HIGH, "Notifier", COMMAND, ITEM_ID);
  29  *
  30  * where COMMAND is one of the following:
  31  *
  32  *              activity                                (in diaspora.php, dfrn_confirm.php, profiles.php)
  33  *              comment-import                  (in diaspora.php, items.php)
  34  *              comment-new                             (in item.php)
  35  *              drop                                    (in diaspora.php, items.php, photos.php)
  36  *              edit_post                               (in item.php)
  37  *              event                                   (in events.php)
  38  *              like                                    (in like.php, poke.php)
  39  *              mail                                    (in message.php)
  40  *              suggest                                 (in fsuggest.php)
  41  *              tag                                             (in photos.php, poke.php, tagger.php)
  42  *              tgroup                                  (in items.php)
  43  *              wall-new                                (in photos.php, item.php)
  44  *              removeme                                (in Contact.php)
  45  *              relocate                                (in uimport.php)
  46  *
  47  * and ITEM_ID is the id of the item in the database that needs to be sent to others.
  48  */
  49
  50 class Notifier {
  51         public static function execute($cmd, $item_id) {
  52                 global $a;
  53
  54                 logger('notifier: invoked: '.$cmd.': '.$item_id, LOGGER_DEBUG);
  55
  56                 $top_level = false;
  57                 $recipients = [];
  58                 $url_recipients = [];
  59
  60                 $normal_mode = true;
  61                 $recipients_relocate = [];
  62
  63                 if ($cmd == Delivery::MAIL) {
  64                         $normal_mode = false;
  65                         $message = dba::selectFirst('mail', ['uid', 'contact-id'], ['id' => $item_id]);
  66                         if (!DBM::is_result($message)) {
  67                                 return;
  68                         }
  69                         $uid = $message['uid'];
  70                         $recipients[] = $message['contact-id'];
  71                 } elseif ($cmd == Delivery::SUGGESTION) {
  72                         $normal_mode = false;
  73                         $suggest = dba::selectFirst('fsuggest', ['uid', 'cid'], ['id' => $item_id]);
  74                         if (!DBM::is_result($suggest)) {
  75                                 return;
  76                         }
  77                         $uid = $suggest['uid'];
  78                         $recipients[] = $suggest['cid'];
  79                 } elseif ($cmd == Delivery::REMOVAL) {
  80                         $r = q("SELECT `contact`.*, `user`.`prvkey` AS `uprvkey`,
  81                                         `user`.`timezone`, `user`.`nickname`, `user`.`sprvkey`, `user`.`spubkey`,
  82                                         `user`.`page-flags`, `user`.`prvnets`, `user`.`account-type`, `user`.`guid`
  83                                 FROM `contact` INNER JOIN `user` ON `user`.`uid` = `contact`.`uid`
  84                                         WHERE `contact`.`uid` = %d AND `contact`.`self` LIMIT 1",
  85                                         intval($item_id));
  86                         if (!$r) {
  87                                 return;
  88                         }
  89                         $user = $r[0];
  90
  91                         $r = q("SELECT * FROM `contact` WHERE NOT `self` AND `uid` = %d", intval($item_id));
  92                         if (!$r) {
  93                                 return;
  94                         }
  95                         foreach ($r as $contact) {
  96                                 Contact::terminateFriendship($user, $contact);
  97                         }
  98                         return;
  99                 } elseif ($cmd == Delivery::RELOCATION) {
 100                         $normal_mode = false;
 101                         $uid = $item_id;
 102
 103                         $recipients_relocate = q("SELECT * FROM `contact` WHERE `uid` = %d AND NOT `self` AND `network` IN ('%s', '%s')",
 104                                                 intval($uid), NETWORK_DFRN, NETWORK_DIASPORA);
 105                 } else {
 106                         // find ancestors
 107                         $target_item = dba::fetch_first("SELECT `item`.*, `contact`.`uid` AS `cuid` FROM `item`
 108                                                 INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 109                                                 WHERE `item`.`id` = ? AND `visible` AND NOT `moderated`", $item_id);
 110
 111                         if (!DBM::is_result($target_item) || !intval($target_item['parent'])) {
 112                                 return;
 113                         }
 114
 115                         $parent_id = intval($target_item['parent']);
 116                         $uid = $target_item['cuid'];
 117                         $updated = $target_item['edited'];
 118
 119                         $items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
 120                                 FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d AND visible AND NOT moderated ORDER BY `id` ASC",
 121                                 intval($parent_id)
 122                         );
 123
 124                         if (!count($items)) {
 125                                 return;
 126                         }
 127
 128                         // avoid race condition with deleting entries
 129                         if ($items[0]['deleted']) {
 130                                 foreach ($items as $item) {
 131                                         $item['deleted'] = 1;
 132                                 }
 133                         }
 134
 135                         if ((count($items) == 1) && ($items[0]['id'] === $target_item['id']) && ($items[0]['uri'] === $items[0]['parent-uri'])) {
 136                                 logger('notifier: top level post');
 137                                 $top_level = true;
 138                         }
 139                 }
 140
 141                 $owner = User::getOwnerDataById($uid);
 142                 if (!$owner) {
 143                         return;
 144                 }
 145
 146                 $walltowall = ($top_level && ($owner['id'] != $items[0]['contact-id']) ? true : false);
 147
 148                 // Should the post be transmitted to Diaspora?
 149                 $diaspora_delivery = true;
 150
 151                 // If this is a public conversation, notify the feed hub
 152                 $public_message = true;
 153
 154                 // Do a PuSH
 155                 $push_notify = false;
 156
 157                 // Deliver directly to a forum, don't PuSH
 158                 $direct_forum_delivery = false;
 159
 160                 $followup = false;
 161                 $recipients_followup = [];
 162                 $conversants = [];
 163
 164                 if (!in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION, Delivery::RELOCATION])) {
 165                         $parent = $items[0];
 166
 167                         $thr_parent = q("SELECT `network`, `author-link`, `owner-link` FROM `item` WHERE `uri` = '%s' AND `uid` = %d",
 168                                 dbesc($target_item["thr-parent"]), intval($target_item["uid"]));
 169
 170                         logger('GUID: '.$target_item["guid"].': Parent is '.$parent['network'].'. Thread parent is '.$thr_parent[0]['network'], LOGGER_DEBUG);
 171
 172                         // This is IMPORTANT!!!!
 173
 174                         // We will only send a "notify owner to relay" or followup message if the referenced post
 175                         // originated on our system by virtue of having our hostname somewhere
 176                         // in the URI, AND it was a comment (not top_level) AND the parent originated elsewhere.
 177
 178                         // if $parent['wall'] == 1 we will already have the parent message in our array
 179                         // and we will relay the whole lot.
 180
 181                         $localhost = str_replace('www.','',$a->get_hostname());
 182                         if (strpos($localhost,':')) {
 183                                 $localhost = substr($localhost,0,strpos($localhost,':'));
 184                         }
 185                         /**
 186                          *
 187                          * Be VERY CAREFUL if you make any changes to the following several lines. Seemingly innocuous changes
 188                          * have been known to cause runaway conditions which affected several servers, along with
 189                          * permissions issues.
 190                          *
 191                          */
 192
 193                         $relay_to_owner = false;
 194
 195                         if (!$top_level && ($parent['wall'] == 0) && (stristr($target_item['uri'],$localhost))) {
 196                                 $relay_to_owner = true;
 197                         }
 198
 199
 200                         if (($cmd === 'uplink') && (intval($parent['forum_mode']) == 1) && !$top_level) {
 201                                 $relay_to_owner = true;
 202                         }
 203
 204                         // until the 'origin' flag has been in use for several months
 205                         // we will just use it as a fallback test
 206                         // later we will be able to use it as the primary test of whether or not to relay.
 207
 208                         if (!$target_item['origin']) {
 209                                 $relay_to_owner = false;
 210                         }
 211                         if ($parent['origin']) {
 212                                 $relay_to_owner = false;
 213                         }
 214
 215                         // Special treatment for forum posts
 216                         if (($target_item['author-link'] != $target_item['owner-link']) &&
 217                                 ($owner['id'] != $target_item['contact-id']) &&
 218                                 ($target_item['uri'] === $target_item['parent-uri'])) {
 219
 220                                 $fields = ['forum', 'prv'];
 221                                 $condition = ['id' => $target_item['contact-id']];
 222                                 $contact = dba::selectFirst('contact', $fields, $condition);
 223                                 if (!DBM::is_result($contact)) {
 224                                         // Should never happen
 225                                         return false;
 226                                 }
 227
 228                                 // Is the post from a forum?
 229                                 if ($contact['forum'] || $contact['prv']) {
 230                                         $relay_to_owner = true;
 231                                         $direct_forum_delivery = true;
 232                                 }
 233                         }
 234                         if ($relay_to_owner) {
 235                                 // local followup to remote post
 236                                 $followup = true;
 237                                 $public_message = false; // not public
 238                                 $conversant_str = dbesc($parent['contact-id']);
 239                                 $recipients = [$parent['contact-id']];
 240                                 $recipients_followup  = [$parent['contact-id']];
 241
 242                                 logger('notifier: followup '.$target_item["guid"].' to '.$conversant_str, LOGGER_DEBUG);
 243
 244                                 //if (!$target_item['private'] && $target_item['wall'] &&
 245                                 if (!$target_item['private'] &&
 246                                         (strlen($target_item['allow_cid'].$target_item['allow_gid'].
 247                                                 $target_item['deny_cid'].$target_item['deny_gid']) == 0))
 248                                         $push_notify = true;
 249
 250                                 if (($thr_parent && ($thr_parent[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
 251                                         $push_notify = true;
 252
 253                                         if ($parent["network"] == NETWORK_OSTATUS) {
 254                                                 // Distribute the message to the DFRN contacts as if this wasn't a followup since OStatus can't relay comments
 255                                                 // Currently it is work at progress
 256                                                 $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s' AND NOT `blocked` AND NOT `pending` AND NOT `archive`",
 257                                                         intval($uid),
 258                                                         dbesc(NETWORK_DFRN)
 259                                                 );
 260                                                 if (DBM::is_result($r)) {
 261                                                         foreach ($r as $rr) {
 262                                                                 $recipients_followup[] = $rr['id'];
 263                                                         }
 264                                                 }
 265                                         }
 266                                 }
 267
 268                                 if ($direct_forum_delivery) {
 269                                         $push_notify = false;
 270                                 }
 271
 272                                 logger("Notify ".$target_item["guid"]." via PuSH: ".($push_notify?"Yes":"No"), LOGGER_DEBUG);
 273                         } else {
 274                                 $followup = false;
 275
 276                                 logger('Distributing directly '.$target_item["guid"], LOGGER_DEBUG);
 277
 278                                 // don't send deletions onward for other people's stuff
 279
 280                                 if ($target_item['deleted'] && !intval($target_item['wall'])) {
 281                                         logger('notifier: ignoring delete notification for non-wall item');
 282                                         return;
 283                                 }
 284
 285                                 if (strlen($parent['allow_cid'])
 286                                         || strlen($parent['allow_gid'])
 287                                         || strlen($parent['deny_cid'])
 288                                         || strlen($parent['deny_gid'])) {
 289                                         $public_message = false; // private recipients, not public
 290                                 }
 291
 292                                 $allow_people = expand_acl($parent['allow_cid']);
 293                                 $allow_groups = Group::expand(expand_acl($parent['allow_gid']),true);
 294                                 $deny_people  = expand_acl($parent['deny_cid']);
 295                                 $deny_groups  = Group::expand(expand_acl($parent['deny_gid']));
 296
 297                                 // if our parent is a public forum (forum_mode == 1), uplink to the origional author causing
 298                                 // a delivery fork. private groups (forum_mode == 2) do not uplink
 299
 300                                 if ((intval($parent['forum_mode']) == 1) && !$top_level && ($cmd !== 'uplink')) {
 301                                         Worker::add($a->queue['priority'], 'Notifier', 'uplink', $item_id);
 302                                 }
 303
 304                                 foreach ($items as $item) {
 305                                         $recipients[] = $item['contact-id'];
 306                                         $conversants[] = $item['contact-id'];
 307                                         // pull out additional tagged people to notify (if public message)
 308                                         if ($public_message && strlen($item['inform'])) {
 309                                                 $people = explode(',',$item['inform']);
 310                                                 foreach ($people as $person) {
 311                                                         if (substr($person,0,4) === 'cid:') {
 312                                                                 $recipients[] = intval(substr($person,4));
 313                                                                 $conversants[] = intval(substr($person,4));
 314                                                         } else {
 315                                                                 $url_recipients[] = substr($person,4);
 316                                                         }
 317                                                 }
 318                                         }
 319                                 }
 320
 321                                 if (count($url_recipients)) {
 322                                         logger('notifier: '.$target_item["guid"].' url_recipients ' . print_r($url_recipients,true));
 323                                 }
 324
 325                                 $conversants = array_unique($conversants);
 326
 327                                 $recipients = array_unique(array_merge($recipients,$allow_people,$allow_groups));
 328                                 $deny = array_unique(array_merge($deny_people,$deny_groups));
 329                                 $recipients = array_diff($recipients,$deny);
 330
 331                                 $conversant_str = dbesc(implode(', ',$conversants));
 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[0]['network'] == NETWORK_OSTATUS)) || ($parent['network'] == NETWORK_OSTATUS)) {
 337                                 $diaspora_delivery = false;
 338
 339                                 logger('Some parent is OStatus for '.$target_item["guid"]." - Author: ".$thr_parent[0]['author-link']." - Owner: ".$thr_parent[0]['owner-link'], LOGGER_DEBUG);
 340
 341                                 // Send a salmon to the parent author
 342                                 $r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
 343                                         dbesc(normalise_link($thr_parent[0]['author-link'])),
 344                                         intval($uid));
 345                                 if (DBM::is_result($r)) {
 346                                         $probed_contact = $r[0];
 347                                 } else {
 348                                         $probed_contact = Probe::uri($thr_parent[0]['author-link']);
 349                                 }
 350
 351                                 if ($probed_contact["notify"] != "") {
 352                                         logger('Notify parent author '.$probed_contact["url"].': '.$probed_contact["notify"]);
 353                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 354                                 }
 355
 356                                 // Send a salmon to the parent owner
 357                                 $r = q("SELECT `url`, `notify` FROM `contact` WHERE `nurl`='%s' AND `uid` IN (0, %d) AND `notify` != ''",
 358                                         dbesc(normalise_link($thr_parent[0]['owner-link'])),
 359                                         intval($uid));
 360                                 if (DBM::is_result($r)) {
 361                                         $probed_contact = $r[0];
 362                                 } else {
 363                                         $probed_contact = Probe::uri($thr_parent[0]['owner-link']);
 364                                 }
 365
 366                                 if ($probed_contact["notify"] != "") {
 367                                         logger('Notify parent owner '.$probed_contact["url"].': '.$probed_contact["notify"]);
 368                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 369                                 }
 370
 371                                 // Send a salmon notification to every person we mentioned in the post
 372                                 $arr = explode(',',$target_item['tag']);
 373                                 foreach ($arr as $x) {
 374                                         //logger('Checking tag '.$x, LOGGER_DEBUG);
 375                                         $matches = null;
 376                                         if (preg_match('/@\[url=([^\]]*)\]/',$x,$matches)) {
 377                                                         $probed_contact = Probe::uri($matches[1]);
 378                                                 if ($probed_contact["notify"] != "") {
 379                                                         logger('Notify mentioned user '.$probed_contact["url"].': '.$probed_contact["notify"]);
 380                                                         $url_recipients[$probed_contact["notify"]] = $probed_contact["notify"];
 381                                                 }
 382                                         }
 383                                 }
 384
 385                                 // It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
 386                                 $networks = [NETWORK_OSTATUS, NETWORK_DFRN];
 387                         } else {
 388                                 $networks = [NETWORK_OSTATUS, NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_MAIL];
 389                         }
 390                 } else {
 391                         $public_message = false;
 392                 }
 393
 394                 // If this is a public message and pubmail is set on the parent, include all your email contacts
 395                 if (function_exists('imap_open') && !Config::get('system','imap_disabled')) {
 396                         if (!strlen($target_item['allow_cid']) && !strlen($target_item['allow_gid'])
 397                                 && !strlen($target_item['deny_cid']) && !strlen($target_item['deny_gid'])
 398                                 && intval($target_item['pubmail'])) {
 399                                 $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s'",
 400                                         intval($uid),
 401                                         dbesc(NETWORK_MAIL)
 402                                 );
 403                                 if (DBM::is_result($r)) {
 404                                         foreach ($r as $rr) {
 405                                                 $recipients[] = $rr['id'];
 406                                         }
 407                                 }
 408                         }
 409                 }
 410
 411                 if (($cmd == Delivery::RELOCATION)) {
 412                         $r = $recipients_relocate;
 413                 } else {
 414                         if ($followup) {
 415                                 $recipients = $recipients_followup;
 416                         }
 417                         $condition = ['id' => $recipients, 'self' => false,
 418                                 'blocked' => false, 'pending' => false, 'archive' => false];
 419                         if (!empty($networks)) {
 420                                 $condition['network'] = $networks;
 421                         }
 422                         $contacts = dba::select('contact', ['id', 'url', 'network'], $condition);
 423                         $r = dba::inArray($contacts);
 424                 }
 425
 426                 // delivery loop
 427                 if (DBM::is_result($r)) {
 428                         foreach ($r as $contact) {
 429                                 logger("Deliver ".$target_item["guid"]." to ".$contact['url']." via network ".$contact['network'], LOGGER_DEBUG);
 430
 431                                 Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
 432                                                 'Delivery', $cmd, $item_id, (int)$contact['id']);
 433                         }
 434                 }
 435
 436                 // send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 437                 // They are especially used for notifications to OStatus users that don't follow us.
 438                 if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
 439                         $slap = OStatus::salmon($target_item, $owner);
 440                         foreach ($url_recipients as $url) {
 441                                 if ($url) {
 442                                         logger('notifier: urldelivery: ' . $url);
 443                                         $deliver_status = Salmon::slapper($owner, $url, $slap);
 444                                         /// @TODO Redeliver/queue these items on failure, though there is no contact record
 445                                 }
 446                         }
 447                 }
 448
 449                 if ($public_message) {
 450                         $r1 = [];
 451
 452                         if ($diaspora_delivery) {
 453                                 $r1 = q("SELECT `batch`, ANY_VALUE(`id`) AS `id`, ANY_VALUE(`name`) AS `name`, ANY_VALUE(`network`) AS `network`
 454                                         FROM `contact` WHERE `network` = '%s' AND `batch` != ''
 455                                         AND `uid` = %d AND `rel` != %d AND NOT `blocked` AND NOT `pending` AND NOT `archive` GROUP BY `batch`",
 456                                         dbesc(NETWORK_DIASPORA),
 457                                         intval($owner['uid']),
 458                                         intval(CONTACT_IS_SHARING)
 459                                 );
 460
 461                                 // Fetch the participation list
 462                                 // The function will ensure that there are no duplicates
 463                                 $r1 = Diaspora::participantsForThread($item_id, $r1);
 464
 465                                 // Add the relay to the list, avoid duplicates
 466                                 if (!$followup) {
 467                                         $r1 = Diaspora::relayList($item_id, $r1);
 468                                 }
 469                         }
 470
 471                         $condition = ['network' => NETWORK_DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 472                                 'pending' => false, 'archive' => false, 'rel' => [CONTACT_IS_FOLLOWER, CONTACT_IS_FRIEND]];
 473                         $r2 = dba::inArray(dba::select('contact', ['id', 'name', 'network'], $condition));
 474
 475                         $r = array_merge($r2, $r1);
 476
 477                         if (DBM::is_result($r)) {
 478                                 logger('pubdeliver '.$target_item["guid"].': '.print_r($r,true), LOGGER_DEBUG);
 479
 480                                 foreach ($r as $rr) {
 481                                         // except for Diaspora batch jobs
 482                                         // Don't deliver to folks who have already been delivered to
 483
 484                                         if (($rr['network'] !== NETWORK_DIASPORA) && (in_array($rr['id'], $conversants))) {
 485                                                 logger('notifier: already delivered id=' . $rr['id']);
 486                                                 continue;
 487                                         }
 488
 489                                         if (!in_array($cmd, [Delivery::MAIL, Delivery::SUGGESTION]) && !$followup) {
 490                                                 logger('notifier: delivery agent: '.$rr['name'].' '.$rr['id'].' '.$rr['network'].' '.$target_item["guid"]);
 491                                                 Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
 492                                                                 'Delivery', $cmd, $item_id, (int)$rr['id']);
 493                                         }
 494                                 }
 495                         }
 496
 497                         $push_notify = true;
 498                 }
 499
 500                 // Notify PuSH subscribers (Used for OStatus distribution of regular posts)
 501                 if ($push_notify) {
 502                         logger('Activating internal PuSH for item '.$item_id, LOGGER_DEBUG);
 503
 504                         // Handling the pubsubhubbub requests
 505                         PushSubscriber::publishFeed($owner['uid'], $a->queue['priority']);
 506                 }
 507
 508                 logger('notifier: calling hooks for ' . $cmd . ' ' . $item_id, LOGGER_DEBUG);
 509
 510                 if ($normal_mode) {
 511                         Addon::forkHooks($a->queue['priority'], 'notifier_normal', $target_item);
 512                 }
 513
 514                 Addon::callHooks('notifier_end',$target_item);
 515
 516                 return;
 517         }
 518 }