src/Worker/OnePoll.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Worker;
  23
  24 use Friendica\Core\Logger;
  25 use Friendica\Core\Protocol;
  26 use Friendica\Database\DBA;
  27 use Friendica\DI;
  28 use Friendica\Model\Contact;
  29 use Friendica\Model\Item;
  30 use Friendica\Model\User;
  31 use Friendica\Protocol\Activity;
  32 use Friendica\Protocol\ActivityPub;
  33 use Friendica\Protocol\Email;
  34 use Friendica\Protocol\Feed;
  35 use Friendica\Util\DateTimeFormat;
  36 use Friendica\Util\Strings;
  37 use Friendica\Util\XML;
  38
  39 class OnePoll
  40 {
  41         public static function execute($contact_id = 0, $command = '')
  42         {
  43                 Logger::log('Start for contact ' . $contact_id);
  44
  45                 $force = false;
  46
  47                 if ($command == "force") {
  48                         $force = true;
  49                 }
  50
  51                 if (!$contact_id) {
  52                         Logger::log('no contact');
  53                         return;
  54                 }
  55
  56
  57                 $contact = DBA::selectFirst('contact', [], ['id' => $contact_id]);
  58                 if (!DBA::isResult($contact)) {
  59                         Logger::log('Contact not found or cannot be used.');
  60                         return;
  61                 }
  62
  63                 if (($contact['network'] != Protocol::MAIL) || $force) {
  64                         Contact::updateFromProbe($contact_id, '', $force);
  65                 }
  66
  67                 // Special treatment for wrongly detected local contacts
  68                 if (!$force && ($contact['network'] != Protocol::DFRN) && Contact::isLocalById($contact_id)) {
  69                         Contact::updateFromProbe($contact_id, Protocol::DFRN, true);
  70                         $contact = DBA::selectFirst('contact', [], ['id' => $contact_id]);
  71                 }
  72
  73                 if (($contact['network'] == Protocol::DFRN) && !Contact::isLegacyDFRNContact($contact)) {
  74                         $protocol = Protocol::ACTIVITYPUB;
  75                 } else {
  76                         $protocol = $contact['network'];
  77                 }
  78
  79                 $importer_uid = $contact['uid'];
  80
  81                 $updated = DateTimeFormat::utcNow();
  82
  83                 if ($importer_uid == 0) {
  84                         Logger::log('Ignore public contacts');
  85
  86                         // set the last-update so we don't keep polling
  87                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
  88                         return;
  89                 }
  90
  91                 // Possibly switch the remote contact to AP
  92                 if ($protocol === Protocol::OSTATUS) {
  93                         ActivityPub\Receiver::switchContact($contact['id'], $importer_uid, $contact['url']);
  94                         $contact = DBA::selectFirst('contact', [], ['id' => $contact_id]);
  95                 }
  96
  97                 // Don't poll if polling is deactivated (But we poll feeds and mails anyway)
  98                 if (!in_array($protocol, [Protocol::FEED, Protocol::MAIL]) && DI::config()->get('system', 'disable_polling')) {
  99                         Logger::log('Polling is disabled');
 100
 101                         // set the last-update so we don't keep polling
 102                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
 103                         return;
 104                 }
 105
 106                 // We don't poll AP contacts by now
 107                 if ($protocol === Protocol::ACTIVITYPUB) {
 108                         Logger::log("Don't poll AP contact");
 109
 110                         // set the last-update so we don't keep polling
 111                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
 112                         return;
 113                 }
 114
 115                 $importer = User::getOwnerDataById($importer_uid);
 116
 117                 if (empty($importer)) {
 118                         Logger::log('No self contact for user '.$importer_uid);
 119
 120                         // set the last-update so we don't keep polling
 121                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
 122                         return;
 123                 }
 124
 125                 $url = '';
 126                 $xml = false;
 127
 128                 if ($contact['subhub']) {
 129                         $poll_interval = DI::config()->get('system', 'pushpoll_frequency', 3);
 130                         $contact['priority'] = intval($poll_interval);
 131                         $hub_update = false;
 132
 133                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($contact['last-update'] . " + 1 day")) {
 134                                 $hub_update = true;
 135                         }
 136                 } else {
 137                         $hub_update = false;
 138                 }
 139
 140                 Logger::log("poll: ({$protocol}-{$contact['id']}) IMPORTER: {$importer['name']}, CONTACT: {$contact['name']}");
 141
 142                 $xml = '';
 143
 144                 if ($protocol === Protocol::DFRN) {
 145                         $xml = self::pollDFRN($contact, $updated);
 146                 } elseif (($protocol === Protocol::OSTATUS)
 147                         || ($protocol === Protocol::DIASPORA)
 148                         || ($protocol === Protocol::FEED)) {
 149                         $xml = self::pollFeed($contact, $protocol, $updated);
 150                 } elseif ($protocol === Protocol::MAIL) {
 151                         self::pollMail($contact, $importer_uid, $updated);
 152                 }
 153
 154                 if (!empty($xml)) {
 155                         Logger::log('received xml : ' . $xml, Logger::DATA);
 156                         if (!strstr($xml, '<')) {
 157                                 Logger::log('post_handshake: response from ' . $url . ' did not contain XML.');
 158
 159                                 $fields = ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated];
 160                                 self::updateContact($contact, $fields);
 161                                 Contact::markForArchival($contact);
 162                                 return;
 163                         }
 164
 165
 166                         Logger::log("Consume feed of contact ".$contact['id']);
 167
 168                         Feed::consume($xml, $importer, $contact, $hub);
 169
 170                         // do it a second time for DFRN so that any children find their parents.
 171                         if ($protocol === Protocol::DFRN) {
 172                                 Feed::consume($xml, $importer, $contact, $hub);
 173                         }
 174
 175                         $hubmode = 'subscribe';
 176                         if ($protocol === Protocol::DFRN || $contact['blocked']) {
 177                                 $hubmode = 'unsubscribe';
 178                         }
 179
 180                         if (($protocol === Protocol::OSTATUS ||  $protocol == Protocol::FEED) && (! $contact['hub-verify'])) {
 181                                 $hub_update = true;
 182                         }
 183
 184                         if ($force) {
 185                                 $hub_update = true;
 186                         }
 187
 188                         Logger::log("Contact ".$contact['id']." returned hub: ".$hub." Network: ".$protocol." Relation: ".$contact['rel']." Update: ".$hub_update);
 189
 190                         if (strlen($hub) && $hub_update && (($contact['rel'] != Contact::FOLLOWER) || $protocol == Protocol::FEED)) {
 191                                 Logger::log('hub ' . $hubmode . ' : ' . $hub . ' contact name : ' . $contact['name'] . ' local user : ' . $importer['name']);
 192                                 $hubs = explode(',', $hub);
 193
 194                                 if (count($hubs)) {
 195                                         foreach ($hubs as $h) {
 196                                                 $h = trim($h);
 197
 198                                                 if (!strlen($h)) {
 199                                                         continue;
 200                                                 }
 201
 202                                                 self::subscribeToHub($h, $importer, $contact, $hubmode);
 203                                         }
 204                                 }
 205                         }
 206
 207                         self::updateContact($contact, ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
 208                         Contact::unmarkForArchival($contact);
 209                 } elseif (in_array($contact["network"], [Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, Protocol::FEED])) {
 210                         self::updateContact($contact, ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
 211                         Contact::markForArchival($contact);
 212                 } else {
 213                         self::updateContact($contact, ['last-update' => $updated]);
 214                 }
 215
 216                 Logger::log('End');
 217                 return;
 218         }
 219
 220         private static function RemoveReply($subject)
 221         {
 222                 while (in_array(strtolower(substr($subject, 0, 3)), ["re:", "aw:"])) {
 223                         $subject = trim(substr($subject, 4));
 224                 }
 225
 226                 return $subject;
 227         }
 228
 229         /**
 230          * Updates a personal contact entry and the public contact entry
 231          *
 232          * @param array $contact The personal contact entry
 233          * @param array $fields  The fields that are updated
 234          * @throws \Exception
 235          */
 236         private static function updateContact(array $contact, array $fields)
 237         {
 238                 // Update the user's contact
 239                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 240
 241                 // Update the public contact
 242                 DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $contact['nurl']]);
 243
 244                 // Update the rest of the contacts that aren't polled
 245                 DBA::update('contact', $fields, ['rel' => Contact::FOLLOWER, 'nurl' => $contact['nurl']]);
 246         }
 247
 248         /**
 249          * Poll DFRN contacts
 250          *
 251          * @param  array  $contact The personal contact entry
 252          * @param  string $updated The updated date
 253          * @return string polled XML
 254          * @throws \Exception
 255          */
 256         private static function pollDFRN(array $contact, $updated)
 257         {
 258                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
 259                 if (intval($contact['duplex']) && $contact['dfrn-id']) {
 260                         $idtosend = '0:' . $orig_id;
 261                 }
 262                 if (intval($contact['duplex']) && $contact['issued-id']) {
 263                         $idtosend = '1:' . $orig_id;
 264                 }
 265
 266                 // they have permission to write to us. We already filtered this in the contact query.
 267                 $perm = 'rw';
 268
 269                 // But this may be our first communication, so set the writable flag if it isn't set already.
 270                 if (!intval($contact['writable'])) {
 271                         $fields = ['writable' => true];
 272                         DBA::update('contact', $fields, ['id' => $contact['id']]);
 273                 }
 274
 275                 $last_update = (($contact['last-update'] <= DBA::NULL_DATETIME)
 276                         ? DateTimeFormat::utc('now - 7 days', DateTimeFormat::ATOM)
 277                         : DateTimeFormat::utc($contact['last-update'], DateTimeFormat::ATOM)
 278                 );
 279
 280                 $url = $contact['poll'] . '?dfrn_id=' . $idtosend
 281                         . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 282                         . '&type=data&last_update=' . $last_update
 283                         . '&perm=' . $perm;
 284
 285                 $curlResult = DI::httpRequest()->get($url);
 286
 287                 if (!$curlResult->isSuccess() && ($curlResult->getErrorNumber() == CURLE_OPERATION_TIMEDOUT)) {
 288                         // set the last-update so we don't keep polling
 289                         self::updateContact($contact, ['failed' => true, 'last-update' => $updated]);
 290                         Contact::markForArchival($contact);
 291                         Logger::log('Contact archived');
 292                         return false;
 293                 }
 294
 295                 $handshake_xml = $curlResult->getBody();
 296                 $html_code = $curlResult->getReturnCode();
 297
 298                 Logger::log('handshake with url ' . $url . ' returns xml: ' . $handshake_xml, Logger::DATA);
 299
 300                 if (!strlen($handshake_xml) || ($html_code >= 400) || !$html_code) {
 301                         // dead connection - might be a transient event, or this might
 302                         // mean the software was uninstalled or the domain expired.
 303                         // Will keep trying for one month.
 304                         Logger::log("$url appears to be dead - marking for death ");
 305
 306                         // set the last-update so we don't keep polling
 307                         $fields = ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated];
 308                         self::updateContact($contact, $fields);
 309                         Contact::markForArchival($contact);
 310                         return false;
 311                 }
 312
 313                 if (!strstr($handshake_xml, '<')) {
 314                         Logger::log('response from ' . $url . ' did not contain XML.');
 315
 316                         $fields = ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated];
 317                         self::updateContact($contact, $fields);
 318                         Contact::markForArchival($contact);
 319                         return false;
 320                 }
 321
 322                 $res = XML::parseString($handshake_xml);
 323
 324                 if (!is_object($res)) {
 325                         Logger::info('Unparseable response', ['url' => $url]);
 326
 327                         $fields = ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated];
 328                         self::updateContact($contact, $fields);
 329                         Contact::markForArchival($contact);
 330                         return false;
 331                 }
 332
 333                 if (intval($res->status) == 1) {
 334                         // we may not be friends anymore. Will keep trying for one month.
 335                         Logger::log("$url replied status 1 - marking for death ");
 336
 337                         // set the last-update so we don't keep polling
 338                         $fields = ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated];
 339                         self::updateContact($contact, $fields);
 340                         Contact::markForArchival($contact);
 341                 } elseif ($contact['term-date'] > DBA::NULL_DATETIME) {
 342                         Contact::unmarkForArchival($contact);
 343                 }
 344
 345                 if ((intval($res->status) != 0) || !strlen($res->challenge) || !strlen($res->dfrn_id)) {
 346                         // set the last-update so we don't keep polling
 347                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
 348                         Logger::log('Contact status is ' . $res->status);
 349                         return false;
 350                 }
 351
 352                 if (((float)$res->dfrn_version > 2.21) && ($contact['poco'] == '')) {
 353                         $fields = ['poco' => str_replace('/profile/', '/poco/', $contact['url'])];
 354                         DBA::update('contact', $fields, ['id' => $contact['id']]);
 355                 }
 356
 357                 $postvars = [];
 358
 359                 $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
 360                 $challenge    = hex2bin((string) $res->challenge);
 361
 362                 $final_dfrn_id = '';
 363
 364                 if ($contact['duplex'] && strlen($contact['prvkey'])) {
 365                         openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
 366                         openssl_private_decrypt($challenge, $postvars['challenge'], $contact['prvkey']);
 367                 } else {
 368                         openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
 369                         openssl_public_decrypt($challenge, $postvars['challenge'], $contact['pubkey']);
 370                 }
 371
 372                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 373
 374                 if (strpos($final_dfrn_id, ':') == 1) {
 375                         $final_dfrn_id = substr($final_dfrn_id, 2);
 376                 }
 377
 378                 // There are issues with the legacy DFRN transport layer.
 379                 // Since we mostly don't use it anyway, we won't dig into it deeper, but simply ignore it.
 380                 if (empty($final_dfrn_id) || empty($orig_id)) {
 381                         Logger::log('Contact has got no ID - quitting');
 382                         return false;
 383                 }
 384
 385                 if ($final_dfrn_id != $orig_id) {
 386                         // did not decode properly - cannot trust this site
 387                         Logger::log('ID did not decode: ' . $contact['id'] . ' orig: ' . $orig_id . ' final: ' . $final_dfrn_id);
 388
 389                         // set the last-update so we don't keep polling
 390                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
 391                         Contact::markForArchival($contact);
 392                         return false;
 393                 }
 394
 395                 $postvars['dfrn_id'] = $idtosend;
 396                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 397                 $postvars['perm'] = 'rw';
 398
 399                 return DI::httpRequest()->post($contact['poll'], $postvars)->getBody();
 400         }
 401
 402         /**
 403          * Poll Feed/OStatus contacts
 404          *
 405          * @param  array  $contact The personal contact entry
 406          * @param  string $protocol The used protocol of the contact
 407          * @param  string $updated The updated date
 408          * @return string polled XML
 409          * @throws \Exception
 410          */
 411         private static function pollFeed(array $contact, $protocol, $updated)
 412         {
 413                 // Upgrading DB fields from an older Friendica version
 414                 // Will only do this once per notify-enabled OStatus contact
 415                 // or if relationship changes
 416
 417                 $stat_writeable = $contact['notify'] && ($contact['rel'] == Contact::FOLLOWER || $contact['rel'] == Contact::FRIEND);
 418
 419                 // Contacts from OStatus are always writable
 420                 if ($protocol === Protocol::OSTATUS) {
 421                         $stat_writeable = 1;
 422                 }
 423
 424                 if ($stat_writeable != $contact['writable']) {
 425                         $fields = ['writable' => $stat_writeable];
 426                         DBA::update('contact', $fields, ['id' => $contact['id']]);
 427                 }
 428
 429                 // Are we allowed to import from this person?
 430                 if ($contact['rel'] == Contact::FOLLOWER || $contact['blocked']) {
 431                         // set the last-update so we don't keep polling
 432                         DBA::update('contact', ['last-update' => $updated], ['id' => $contact['id']]);
 433                         Logger::log('Contact is blocked or only a follower');
 434                         return false;
 435                 }
 436
 437                 $cookiejar = tempnam(get_temppath(), 'cookiejar-onepoll-');
 438                 $curlResult = DI::httpRequest()->get($contact['poll'], false, ['cookiejar' => $cookiejar]);
 439                 unlink($cookiejar);
 440
 441                 if ($curlResult->isTimeout()) {
 442                         // set the last-update so we don't keep polling
 443                         self::updateContact($contact, ['failed' => true, 'last-update' => $updated]);
 444                         Contact::markForArchival($contact);
 445                         Logger::log('Contact archived');
 446                         return false;
 447                 }
 448
 449                 return $curlResult->getBody();
 450         }
 451
 452         /**
 453          * Poll Mail contacts
 454          *
 455          * @param  array   $contact      The personal contact entry
 456          * @param  integer $importer_uid The UID of the importer
 457          * @param  string  $updated      The updated date
 458          * @throws \Exception
 459          */
 460         private static function pollMail(array $contact, $importer_uid, $updated)
 461         {
 462                 Logger::log("Mail: Fetching for ".$contact['addr'], Logger::DEBUG);
 463
 464                 $mail_disabled = ((function_exists('imap_open') && !DI::config()->get('system', 'imap_disabled')) ? 0 : 1);
 465                 if ($mail_disabled) {
 466                         // set the last-update so we don't keep polling
 467                         self::updateContact($contact, ['failed' => true, 'last-update' => $updated]);
 468                         Contact::markForArchival($contact);
 469                         Logger::log('Contact archived');
 470                         return;
 471                 }
 472
 473                 Logger::log("Mail: Enabled", Logger::DEBUG);
 474
 475                 $mbox = null;
 476                 $user = DBA::selectFirst('user', ['prvkey'], ['uid' => $importer_uid]);
 477
 478                 $condition = ["`server` != '' AND `uid` = ?", $importer_uid];
 479                 $mailconf = DBA::selectFirst('mailacct', [], $condition);
 480                 if (DBA::isResult($user) && DBA::isResult($mailconf)) {
 481                         $mailbox = Email::constructMailboxName($mailconf);
 482                         $password = '';
 483                         openssl_private_decrypt(hex2bin($mailconf['pass']), $password, $user['prvkey']);
 484                         $mbox = Email::connect($mailbox, $mailconf['user'], $password);
 485                         unset($password);
 486                         Logger::log("Mail: Connect to " . $mailconf['user']);
 487                         if ($mbox) {
 488                                 $fields = ['last_check' => $updated];
 489                                 DBA::update('mailacct', $fields, ['id' => $mailconf['id']]);
 490                                 Logger::log("Mail: Connected to " . $mailconf['user']);
 491                         } else {
 492                                 Logger::log("Mail: Connection error ".$mailconf['user']." ".print_r(imap_errors(), true));
 493                         }
 494                 }
 495
 496                 if (!$mbox) {
 497                         return;
 498                 }
 499
 500                 $msgs = Email::poll($mbox, $contact['addr']);
 501
 502                 if (count($msgs)) {
 503                         Logger::log("Mail: Parsing ".count($msgs)." mails from ".$contact['addr']." for ".$mailconf['user'], Logger::DEBUG);
 504
 505                         $metas = Email::messageMeta($mbox, implode(',', $msgs));
 506
 507                         if (count($metas) != count($msgs)) {
 508                                 Logger::log("for " . $mailconf['user'] . " there are ". count($msgs) . " messages but received " . count($metas) . " metas", Logger::DEBUG);
 509                         } else {
 510                                 $msgs = array_combine($msgs, $metas);
 511
 512                                 foreach ($msgs as $msg_uid => $meta) {
 513                                         Logger::log("Mail: Parsing mail ".$msg_uid, Logger::DATA);
 514
 515                                         $datarray = [];
 516                                         $datarray['uid'] = $importer_uid;
 517                                         $datarray['contact-id'] = $contact['id'];
 518                                         $datarray['verb'] = Activity::POST;
 519                                         $datarray['object-type'] = Activity\ObjectType::NOTE;
 520                                         $datarray['network'] = Protocol::MAIL;
 521                                         // $meta = Email::messageMeta($mbox, $msg_uid);
 522
 523                                         $datarray['uri'] = Email::msgid2iri(trim($meta->message_id, '<>'));
 524
 525                                         // Have we seen it before?
 526                                         $fields = ['deleted', 'id'];
 527                                         $condition = ['uid' => $importer_uid, 'uri' => $datarray['uri']];
 528                                         $item = Item::selectFirst($fields, $condition);
 529                                         if (DBA::isResult($item)) {
 530                                                 Logger::log("Mail: Seen before ".$msg_uid." for ".$mailconf['user']." UID: ".$importer_uid." URI: ".$datarray['uri'],Logger::DEBUG);
 531
 532                                                 // Only delete when mails aren't automatically moved or deleted
 533                                                 if (($mailconf['action'] != 1) && ($mailconf['action'] != 3))
 534                                                         if ($meta->deleted && ! $item['deleted']) {
 535                                                                 $fields = ['deleted' => true, 'changed' => $updated];
 536                                                                 Item::update($fields, ['id' => $item['id']]);
 537                                                         }
 538
 539                                                 switch ($mailconf['action']) {
 540                                                         case 0:
 541                                                                 Logger::log("Mail: Seen before ".$msg_uid." for ".$mailconf['user'].". Doing nothing.", Logger::DEBUG);
 542                                                                 break;
 543                                                         case 1:
 544                                                                 Logger::log("Mail: Deleting ".$msg_uid." for ".$mailconf['user']);
 545                                                                 imap_delete($mbox, $msg_uid, FT_UID);
 546                                                                 break;
 547                                                         case 2:
 548                                                                 Logger::log("Mail: Mark as seen ".$msg_uid." for ".$mailconf['user']);
 549                                                                 imap_setflag_full($mbox, $msg_uid, "\\Seen", ST_UID);
 550                                                                 break;
 551                                                         case 3:
 552                                                                 Logger::log("Mail: Moving ".$msg_uid." to ".$mailconf['movetofolder']." for ".$mailconf['user']);
 553                                                                 imap_setflag_full($mbox, $msg_uid, "\\Seen", ST_UID);
 554                                                                 if ($mailconf['movetofolder'] != "") {
 555                                                                         imap_mail_move($mbox, $msg_uid, $mailconf['movetofolder'], FT_UID);
 556                                                                 }
 557                                                                 break;
 558                                                 }
 559                                                 continue;
 560                                         }
 561
 562                                         // look for a 'references' or an 'in-reply-to' header and try to match with a parent item we have locally.
 563                                         $raw_refs = (property_exists($meta, 'references') ? str_replace("\t", '', $meta->references) : '');
 564                                         if (!trim($raw_refs)) {
 565                                                 $raw_refs = (property_exists($meta, 'in_reply_to') ? str_replace("\t", '', $meta->in_reply_to) : '');
 566                                         }
 567                                         $raw_refs = trim($raw_refs);  // Don't allow a blank reference in $refs_arr
 568
 569                                         if ($raw_refs) {
 570                                                 $refs_arr = explode(' ', $raw_refs);
 571                                                 if (count($refs_arr)) {
 572                                                         for ($x = 0; $x < count($refs_arr); $x ++) {
 573                                                                 $refs_arr[$x] = Email::msgid2iri(str_replace(['<', '>', ' '],['', '', ''], $refs_arr[$x]));
 574                                                         }
 575                                                 }
 576                                                 $condition = ['uri' => $refs_arr, 'uid' => $importer_uid];
 577                                                 $parent = Item::selectFirst(['parent-uri'], $condition);
 578                                                 if (DBA::isResult($parent)) {
 579                                                         $datarray['parent-uri'] = $parent['parent-uri'];  // Set the parent as the top-level item
 580                                                 }
 581                                         }
 582
 583                                         // Decoding the header
 584                                         $subject = imap_mime_header_decode($meta->subject ?? '');
 585                                         $datarray['title'] = "";
 586                                         foreach ($subject as $subpart) {
 587                                                 if ($subpart->charset != "default") {
 588                                                         $datarray['title'] .= iconv($subpart->charset, 'UTF-8//IGNORE', $subpart->text);
 589                                                 } else {
 590                                                         $datarray['title'] .= $subpart->text;
 591                                                 }
 592                                         }
 593                                         $datarray['title'] = Strings::escapeTags(trim($datarray['title']));
 594
 595                                         //$datarray['title'] = Strings::escapeTags(trim($meta->subject));
 596                                         $datarray['created'] = DateTimeFormat::utc($meta->date);
 597
 598                                         // Is it a reply?
 599                                         $reply = ((substr(strtolower($datarray['title']), 0, 3) == "re:") ||
 600                                                 (substr(strtolower($datarray['title']), 0, 3) == "re-") ||
 601                                                 ($raw_refs != ""));
 602
 603                                         // Remove Reply-signs in the subject
 604                                         $datarray['title'] = self::RemoveReply($datarray['title']);
 605
 606                                         // If it seems to be a reply but a header couldn't be found take the last message with matching subject
 607                                         if (empty($datarray['parent-uri']) && $reply) {
 608                                                 $condition = ['title' => $datarray['title'], 'uid' => $importer_uid, 'network' => Protocol::MAIL];
 609                                                 $params = ['order' => ['created' => true]];
 610                                                 $parent = Item::selectFirst(['parent-uri'], $condition, $params);
 611                                                 if (DBA::isResult($parent)) {
 612                                                         $datarray['parent-uri'] = $parent['parent-uri'];
 613                                                 }
 614                                         }
 615
 616                                         if (empty($datarray['parent-uri'])) {
 617                                                 $datarray['parent-uri'] = $datarray['uri'];
 618                                         }
 619
 620                                         $headers = imap_headerinfo($mbox, $meta->msgno);
 621
 622                                         $object = [];
 623
 624                                         if (!empty($headers->from)) {
 625                                                 $object['from'] = $headers->from;
 626                                         }
 627
 628                                         if (!empty($headers->to)) {
 629                                                 $object['to'] = $headers->to;
 630                                         }
 631
 632                                         if (!empty($headers->reply_to)) {
 633                                                 $object['reply_to'] = $headers->reply_to;
 634                                         }
 635
 636                                         if (!empty($headers->sender)) {
 637                                                 $object['sender'] = $headers->sender;
 638                                         }
 639
 640                                         if (!empty($object)) {
 641                                                 $datarray['object'] = json_encode($object);
 642                                         }
 643
 644                                         $fromname = $frommail = $headers->from[0]->mailbox . '@' . $headers->from[0]->host;
 645                                         if (!empty($headers->from[0]->personal)) {
 646                                                 $fromname = $headers->from[0]->personal;
 647                                         }
 648
 649                                         $datarray['author-name'] = $fromname;
 650                                         $datarray['author-link'] = "mailto:".$frommail;
 651                                         $datarray['author-avatar'] = $contact['photo'];
 652
 653                                         $datarray['owner-name'] = $contact['name'];
 654                                         $datarray['owner-link'] = "mailto:".$contact['addr'];
 655                                         $datarray['owner-avatar'] = $contact['photo'];
 656
 657                                         if ($datarray['parent-uri'] === $datarray['uri']) {
 658                                                 $datarray['private'] = Item::PRIVATE;
 659                                         }
 660
 661                                         if (!DI::pConfig()->get($importer_uid, 'system', 'allow_public_email_replies')) {
 662                                                 $datarray['private'] = Item::PRIVATE;
 663                                                 $datarray['allow_cid'] = '<' . $contact['id'] . '>';
 664                                         }
 665
 666                                         $datarray = Email::getMessage($mbox, $msg_uid, $reply, $datarray);
 667                                         if (empty($datarray['body'])) {
 668                                                 Logger::log("Mail: can't fetch msg ".$msg_uid." for ".$mailconf['user']);
 669                                                 continue;
 670                                         }
 671
 672                                         Logger::log("Mail: Importing ".$msg_uid." for ".$mailconf['user']);
 673
 674                                         Item::insert($datarray);
 675
 676                                         switch ($mailconf['action']) {
 677                                                 case 0:
 678                                                         Logger::log("Mail: Seen before ".$msg_uid." for ".$mailconf['user'].". Doing nothing.", Logger::DEBUG);
 679                                                         break;
 680                                                 case 1:
 681                                                         Logger::log("Mail: Deleting ".$msg_uid." for ".$mailconf['user']);
 682                                                         imap_delete($mbox, $msg_uid, FT_UID);
 683                                                         break;
 684                                                 case 2:
 685                                                         Logger::log("Mail: Mark as seen ".$msg_uid." for ".$mailconf['user']);
 686                                                         imap_setflag_full($mbox, $msg_uid, "\\Seen", ST_UID);
 687                                                         break;
 688                                                 case 3:
 689                                                         Logger::log("Mail: Moving ".$msg_uid." to ".$mailconf['movetofolder']." for ".$mailconf['user']);
 690                                                         imap_setflag_full($mbox, $msg_uid, "\\Seen", ST_UID);
 691                                                         if ($mailconf['movetofolder'] != "") {
 692                                                                 imap_mail_move($mbox, $msg_uid, $mailconf['movetofolder'], FT_UID);
 693                                                         }
 694                                                         break;
 695                                         }
 696                                 }
 697                         }
 698                 } else {
 699                         Logger::log("Mail: no mails for ".$mailconf['user']);
 700                 }
 701
 702                 Logger::log("Mail: closing connection for ".$mailconf['user']);
 703                 imap_close($mbox);
 704         }
 705
 706
 707         /**
 708          * @param string $url
 709          * @param array  $importer
 710          * @param array  $contact
 711          * @param string $hubmode
 712          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 713          */
 714         private static function subscribeToHub(string $url, array $importer, array $contact, $hubmode = 'subscribe')
 715         {
 716                 /*
 717                  * Diaspora has different message-ids in feeds than they do
 718                  * through the direct Diaspora protocol. If we try and use
 719                  * the feed, we'll get duplicates. So don't.
 720                  */
 721                 if ($contact['network'] === Protocol::DIASPORA) {
 722                         return;
 723                 }
 724
 725                 // Without an importer we don't have a user id - so we quit
 726                 if (empty($importer)) {
 727                         return;
 728                 }
 729
 730                 $user = DBA::selectFirst('user', ['nickname'], ['uid' => $importer['uid']]);
 731
 732                 // No user, no nickname, we quit
 733                 if (!DBA::isResult($user)) {
 734                         return;
 735                 }
 736
 737                 $push_url = DI::baseUrl() . '/pubsub/' . $user['nickname'] . '/' . $contact['id'];
 738
 739                 // Use a single verify token, even if multiple hubs
 740                 $verify_token = ((strlen($contact['hub-verify'])) ? $contact['hub-verify'] : Strings::getRandomHex());
 741
 742                 $params = 'hub.mode=' . $hubmode . '&hub.callback=' . urlencode($push_url) . '&hub.topic=' . urlencode($contact['poll']) . '&hub.verify=async&hub.verify_token=' . $verify_token;
 743
 744                 Logger::log('subscribe_to_hub: ' . $hubmode . ' ' . $contact['name'] . ' to hub ' . $url . ' endpoint: ' . $push_url . ' with verifier ' . $verify_token);
 745
 746                 if (!strlen($contact['hub-verify']) || ($contact['hub-verify'] != $verify_token)) {
 747                         DBA::update('contact', ['hub-verify' => $verify_token], ['id' => $contact['id']]);
 748                 }
 749
 750                 $postResult = DI::httpRequest()->post($url, $params);
 751
 752                 Logger::log('subscribe_to_hub: returns: ' . $postResult->getReturnCode(), Logger::DEBUG);
 753
 754                 return;
 755
 756         }
 757 }