src/Model/GContact.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\Model;
  23
  24 use DOMDocument;
  25 use DOMXPath;
  26 use Exception;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\System;
  30 use Friendica\Core\Search;
  31 use Friendica\Core\Worker;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Network\Probe;
  35 use Friendica\Protocol\ActivityPub;
  36 use Friendica\Protocol\PortableContact;
  37 use Friendica\Util\DateTimeFormat;
  38 use Friendica\Util\Network;
  39 use Friendica\Util\Strings;
  40
  41 /**
  42  * This class handles GlobalContact related functions
  43  */
  44 class GContact
  45 {
  46         /**
  47          * No discovery of followers/followings
  48          */
  49         const DISCOVERY_NONE = 0;
  50         /**
  51          * Only discover followers/followings from direct contacts
  52          */
  53         const DISCOVERY_DIRECT = 1;
  54         /**
  55          * Recursive discovery of followers/followings
  56          */
  57         const DISCOVERY_RECURSIVE = 2;
  58
  59         /**
  60          * Search global contact table by nick or name
  61          *
  62          * @param string $search Name or nick
  63          * @param string $mode   Search mode (e.g. "community")
  64          *
  65          * @return array with search results
  66          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  67          */
  68         public static function searchByName($search, $mode = '')
  69         {
  70                 if (empty($search)) {
  71                         return [];
  72                 }
  73
  74                 // check supported networks
  75                 if (DI::config()->get('system', 'diaspora_enabled')) {
  76                         $diaspora = Protocol::DIASPORA;
  77                 } else {
  78                         $diaspora = Protocol::DFRN;
  79                 }
  80
  81                 if (!DI::config()->get('system', 'ostatus_disabled')) {
  82                         $ostatus = Protocol::OSTATUS;
  83                 } else {
  84                         $ostatus = Protocol::DFRN;
  85                 }
  86
  87                 // check if we search only communities or every contact
  88                 if ($mode === 'community') {
  89                         $extra_sql = ' AND `community`';
  90                 } else {
  91                         $extra_sql = '';
  92                 }
  93
  94                 $search .= '%';
  95
  96                 $results = DBA::p("SELECT `nurl` FROM `gcontact`
  97                         WHERE NOT `hide` AND `network` IN (?, ?, ?, ?) AND
  98                                 ((`last_contact` >= `last_failure`) OR (`updated` >= `last_failure`)) AND
  99                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
 100                                 GROUP BY `nurl` ORDER BY `nurl` DESC LIMIT 1000",
 101                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $search, $search, $search
 102                 );
 103
 104                 $gcontacts = [];
 105                 while ($result = DBA::fetch($results)) {
 106                         $urlparts = parse_url($result['nurl']);
 107
 108                         // Ignore results that look strange.
 109                         // For historic reasons the gcontact table does contain some garbage.
 110                         if (empty($result['nurl']) || !empty($urlparts['query']) || !empty($urlparts['fragment'])) {
 111                                 continue;
 112                         }
 113
 114                         $gcontacts[] = Contact::getDetailsByURL($result['nurl'], local_user());
 115                 }
 116                 DBA::close($results);
 117                 return $gcontacts;
 118         }
 119
 120         /**
 121          * Link the gcontact entry with user, contact and global contact
 122          *
 123          * @param integer $gcid Global contact ID
 124          * @param integer $uid  User ID
 125          * @param integer $cid  Contact ID
 126          * @param integer $zcid Global Contact ID
 127          * @return void
 128          * @throws Exception
 129          */
 130         public static function link($gcid, $uid = 0, $cid = 0, $zcid = 0)
 131         {
 132                 if ($gcid <= 0) {
 133                         return;
 134                 }
 135
 136                 $condition = ['cid' => $cid, 'uid' => $uid, 'gcid' => $gcid, 'zcid' => $zcid];
 137                 DBA::update('glink', ['updated' => DateTimeFormat::utcNow()], $condition, true);
 138         }
 139
 140         /**
 141          * Sanitize the given gcontact data
 142          *
 143          * Generation:
 144          *  0: No definition
 145          *  1: Profiles on this server
 146          *  2: Contacts of profiles on this server
 147          *  3: Contacts of contacts of profiles on this server
 148          *  4: ...
 149          *
 150          * @param array $gcontact array with gcontact data
 151          * @return array $gcontact
 152          * @throws Exception
 153          */
 154         public static function sanitize($gcontact)
 155         {
 156                 if (empty($gcontact['url'])) {
 157                         throw new Exception('URL is empty');
 158                 }
 159
 160                 $gcontact['server_url'] = $gcontact['server_url'] ?? '';
 161
 162                 $urlparts = parse_url($gcontact['url']);
 163                 if (empty($urlparts['scheme'])) {
 164                         throw new Exception('This (' . $gcontact['url'] . ") doesn't seem to be an url.");
 165                 }
 166
 167                 if (in_array($urlparts['host'], ['twitter.com', 'identi.ca'])) {
 168                         throw new Exception('Contact from a non federated network ignored. (' . $gcontact['url'] . ')');
 169                 }
 170
 171                 // Don't store the statusnet connector as network
 172                 // We can't simply set this to Protocol::OSTATUS since the connector could have fetched posts from friendica as well
 173                 if ($gcontact['network'] == Protocol::STATUSNET) {
 174                         $gcontact['network'] = '';
 175                 }
 176
 177                 // Assure that there are no parameter fragments in the profile url
 178                 if (empty($gcontact['*network']) || in_array($gcontact['network'], Protocol::FEDERATED)) {
 179                         $gcontact['url'] = self::cleanContactUrl($gcontact['url']);
 180                 }
 181
 182                 // The global contacts should contain the original picture, not the cached one
 183                 if (($gcontact['generation'] != 1) && stristr(Strings::normaliseLink($gcontact['photo']), Strings::normaliseLink(DI::baseUrl() . '/photo/'))) {
 184                         $gcontact['photo'] = '';
 185                 }
 186
 187                 if (empty($gcontact['network'])) {
 188                         $gcontact['network'] = '';
 189
 190                         $condition = ["`uid` = 0 AND `nurl` = ? AND `network` != '' AND `network` != ?",
 191                                 Strings::normaliseLink($gcontact['url']), Protocol::STATUSNET];
 192                         $contact = DBA::selectFirst('contact', ['network'], $condition);
 193                         if (DBA::isResult($contact)) {
 194                                 $gcontact['network'] = $contact['network'];
 195                         }
 196
 197                         if (($gcontact['network'] == '') || ($gcontact['network'] == Protocol::OSTATUS)) {
 198                                 $condition = ["`uid` = 0 AND `alias` IN (?, ?) AND `network` != '' AND `network` != ?",
 199                                         $gcontact['url'], Strings::normaliseLink($gcontact['url']), Protocol::STATUSNET];
 200                                 $contact = DBA::selectFirst('contact', ['network'], $condition);
 201                                 if (DBA::isResult($contact)) {
 202                                         $gcontact['network'] = $contact['network'];
 203                                 }
 204                         }
 205                 }
 206
 207                 $fields = ['network', 'updated', 'server_url', 'url', 'addr'];
 208                 $gcnt = DBA::selectFirst('gcontact', $fields, ['nurl' => Strings::normaliseLink($gcontact['url'])]);
 209                 if (DBA::isResult($gcnt)) {
 210                         if (!isset($gcontact['network']) && ($gcnt['network'] != Protocol::STATUSNET)) {
 211                                 $gcontact['network'] = $gcnt['network'];
 212                         }
 213                         if ($gcontact['updated'] <= DBA::NULL_DATETIME) {
 214                                 $gcontact['updated'] = $gcnt['updated'];
 215                         }
 216                         if (!isset($gcontact['server_url']) && (Strings::normaliseLink($gcnt['server_url']) != Strings::normaliseLink($gcnt['url']))) {
 217                                 $gcontact['server_url'] = $gcnt['server_url'];
 218                         }
 219                         if (!isset($gcontact['addr'])) {
 220                                 $gcontact['addr'] = $gcnt['addr'];
 221                         }
 222                 }
 223
 224                 if ((!isset($gcontact['network']) || !isset($gcontact['name']) || !isset($gcontact['addr']) || !isset($gcontact['photo']) || !isset($gcontact['server_url']))
 225                         && GServer::reachable($gcontact['url'], $gcontact['server_url'], $gcontact['network'], false)
 226                 ) {
 227                         $data = Probe::uri($gcontact['url']);
 228
 229                         if ($data['network'] == Protocol::PHANTOM) {
 230                                 throw new Exception('Probing for URL ' . $gcontact['url'] . ' failed');
 231                         }
 232
 233                         $gcontact['server_url'] = $data['baseurl'];
 234
 235                         $gcontact = array_merge($gcontact, $data);
 236                 }
 237
 238                 if (!isset($gcontact['name']) || !isset($gcontact['photo'])) {
 239                         throw new Exception('No name and photo for URL '.$gcontact['url']);
 240                 }
 241
 242                 if (!in_array($gcontact['network'], Protocol::FEDERATED)) {
 243                         throw new Exception('No federated network (' . $gcontact['network'] . ') detected for URL ' . $gcontact['url']);
 244                 }
 245
 246                 if (empty($gcontact['server_url'])) {
 247                         // We check the server url to be sure that it is a real one
 248                         $server_url = self::getBasepath($gcontact['url']);
 249
 250                         // We are now sure that it is a correct URL. So we use it in the future
 251                         if ($server_url != '') {
 252                                 $gcontact['server_url'] = $server_url;
 253                         }
 254                 }
 255
 256                 // The server URL doesn't seem to be valid, so we don't store it.
 257                 if (!GServer::check($gcontact['server_url'], $gcontact['network'])) {
 258                         $gcontact['server_url'] = '';
 259                 }
 260
 261                 return $gcontact;
 262         }
 263
 264         /**
 265          * @param integer $uid id
 266          * @param integer $cid id
 267          * @return integer
 268          * @throws Exception
 269          */
 270         public static function countCommonFriends($uid, $cid)
 271         {
 272                 $r = q(
 273                         "SELECT count(*) as `total`
 274                         FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 275                         WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
 276                         ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR
 277                         (`gcontact`.`updated` >= `gcontact`.`last_failure`))
 278                         AND `gcontact`.`nurl` IN (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0 and id != %d) ",
 279                         intval($cid),
 280                         intval($uid),
 281                         intval($uid),
 282                         intval($cid)
 283                 );
 284
 285                 if (DBA::isResult($r)) {
 286                         return $r[0]['total'];
 287                 }
 288                 return 0;
 289         }
 290
 291         /**
 292          * @param integer $uid  id
 293          * @param integer $zcid zcid
 294          * @return integer
 295          * @throws Exception
 296          */
 297         public static function countCommonFriendsZcid($uid, $zcid)
 298         {
 299                 $r = q(
 300                         "SELECT count(*) as `total`
 301                         FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 302                         where `glink`.`zcid` = %d
 303                         and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0) ",
 304                         intval($zcid),
 305                         intval($uid)
 306                 );
 307
 308                 if (DBA::isResult($r)) {
 309                         return $r[0]['total'];
 310                 }
 311
 312                 return 0;
 313         }
 314
 315         /**
 316          * @param integer $uid     user
 317          * @param integer $cid     cid
 318          * @param integer $start   optional, default 0
 319          * @param integer $limit   optional, default 9999
 320          * @param boolean $shuffle optional, default false
 321          * @return object
 322          * @throws Exception
 323          */
 324         public static function commonFriends($uid, $cid, $start = 0, $limit = 9999, $shuffle = false)
 325         {
 326                 if ($shuffle) {
 327                         $sql_extra = " order by rand() ";
 328                 } else {
 329                         $sql_extra = " order by `gcontact`.`name` asc ";
 330                 }
 331
 332                 $r = q(
 333                         "SELECT `gcontact`.*, `contact`.`id` AS `cid`
 334                         FROM `glink`
 335                         INNER JOIN `gcontact` ON `glink`.`gcid` = `gcontact`.`id`
 336                         INNER JOIN `contact` ON `gcontact`.`nurl` = `contact`.`nurl`
 337                         WHERE `glink`.`cid` = %d and `glink`.`uid` = %d
 338                                 AND `contact`.`uid` = %d AND `contact`.`self` = 0 AND `contact`.`blocked` = 0
 339                                 AND `contact`.`hidden` = 0 AND `contact`.`id` != %d
 340                                 AND ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
 341                                 $sql_extra LIMIT %d, %d",
 342                         intval($cid),
 343                         intval($uid),
 344                         intval($uid),
 345                         intval($cid),
 346                         intval($start),
 347                         intval($limit)
 348                 );
 349
 350                 /// @TODO Check all calling-findings of this function if they properly use DBA::isResult()
 351                 return $r;
 352         }
 353
 354         /**
 355          * @param integer $uid     user
 356          * @param integer $zcid    zcid
 357          * @param integer $start   optional, default 0
 358          * @param integer $limit   optional, default 9999
 359          * @param boolean $shuffle optional, default false
 360          * @return object
 361          * @throws Exception
 362          */
 363         public static function commonFriendsZcid($uid, $zcid, $start = 0, $limit = 9999, $shuffle = false)
 364         {
 365                 if ($shuffle) {
 366                         $sql_extra = " order by rand() ";
 367                 } else {
 368                         $sql_extra = " order by `gcontact`.`name` asc ";
 369                 }
 370
 371                 $r = q(
 372                         "SELECT `gcontact`.*
 373                         FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 374                         where `glink`.`zcid` = %d
 375                         and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and blocked = 0 and hidden = 0)
 376                         $sql_extra limit %d, %d",
 377                         intval($zcid),
 378                         intval($uid),
 379                         intval($start),
 380                         intval($limit)
 381                 );
 382
 383                 /// @TODO Check all calling-findings of this function if they properly use DBA::isResult()
 384                 return $r;
 385         }
 386
 387         /**
 388          * @param integer $uid user
 389          * @param integer $cid cid
 390          * @return integer
 391          * @throws Exception
 392          */
 393         public static function countAllFriends($uid, $cid)
 394         {
 395                 $r = q(
 396                         "SELECT count(*) as `total`
 397                         FROM `glink` INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 398                         where `glink`.`cid` = %d and `glink`.`uid` = %d AND
 399                         ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))",
 400                         intval($cid),
 401                         intval($uid)
 402                 );
 403
 404                 if (DBA::isResult($r)) {
 405                         return $r[0]['total'];
 406                 }
 407
 408                 return 0;
 409         }
 410
 411         /**
 412          * @param integer $uid   user
 413          * @param integer $cid   cid
 414          * @param integer $start optional, default 0
 415          * @param integer $limit optional, default 80
 416          * @return array
 417          * @throws Exception
 418          */
 419         public static function allFriends($uid, $cid, $start = 0, $limit = 80)
 420         {
 421                 $r = q(
 422                         "SELECT `gcontact`.*, `contact`.`id` AS `cid`
 423                         FROM `glink`
 424                         INNER JOIN `gcontact` on `glink`.`gcid` = `gcontact`.`id`
 425                         LEFT JOIN `contact` ON `contact`.`nurl` = `gcontact`.`nurl` AND `contact`.`uid` = %d
 426                         WHERE `glink`.`cid` = %d AND `glink`.`uid` = %d AND
 427                         ((`gcontact`.`last_contact` >= `gcontact`.`last_failure`) OR (`gcontact`.`updated` >= `gcontact`.`last_failure`))
 428                         ORDER BY `gcontact`.`name` ASC LIMIT %d, %d ",
 429                         intval($uid),
 430                         intval($cid),
 431                         intval($uid),
 432                         intval($start),
 433                         intval($limit)
 434                 );
 435
 436                 /// @TODO Check all calling-findings of this function if they properly use DBA::isResult()
 437                 return $r;
 438         }
 439
 440         /**
 441          * @param int     $uid   user
 442          * @param integer $start optional, default 0
 443          * @param integer $limit optional, default 80
 444          * @return array
 445          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 446          */
 447         public static function suggestionQuery($uid, $start = 0, $limit = 80)
 448         {
 449                 if (!$uid) {
 450                         return [];
 451                 }
 452
 453                 $network = [Protocol::DFRN, Protocol::ACTIVITYPUB];
 454
 455                 if (DI::config()->get('system', 'diaspora_enabled')) {
 456                         $network[] = Protocol::DIASPORA;
 457                 }
 458
 459                 if (!DI::config()->get('system', 'ostatus_disabled')) {
 460                         $network[] = Protocol::OSTATUS;
 461                 }
 462
 463                 $sql_network = "'" . implode("', '", $network) . "'";
 464
 465                 /// @todo This query is really slow
 466                 // By now we cache the data for five minutes
 467                 $r = q(
 468                         "SELECT count(glink.gcid) as `total`, gcontact.* from gcontact
 469                         INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
 470                         where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
 471                         AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
 472                         AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
 473                         AND `gcontact`.`updated` >= '%s' AND NOT `gcontact`.`hide`
 474                         AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
 475                         AND `gcontact`.`network` IN (%s)
 476                         GROUP BY `glink`.`gcid` ORDER BY `gcontact`.`updated` DESC,`total` DESC LIMIT %d, %d",
 477                         intval($uid),
 478                         intval($uid),
 479                         intval($uid),
 480                         intval($uid),
 481                         DBA::NULL_DATETIME,
 482                         $sql_network,
 483                         intval($start),
 484                         intval($limit)
 485                 );
 486
 487                 if (DBA::isResult($r) && count($r) >= ($limit -1)) {
 488                         return $r;
 489                 }
 490
 491                 $r2 = q(
 492                         "SELECT gcontact.* FROM gcontact
 493                         INNER JOIN `glink` ON `glink`.`gcid` = `gcontact`.`id`
 494                         WHERE `glink`.`uid` = 0 AND `glink`.`cid` = 0 AND `glink`.`zcid` = 0 AND NOT `gcontact`.`nurl` IN (SELECT `nurl` FROM `contact` WHERE `uid` = %d)
 495                         AND NOT `gcontact`.`name` IN (SELECT `name` FROM `contact` WHERE `uid` = %d)
 496                         AND NOT `gcontact`.`id` IN (SELECT `gcid` FROM `gcign` WHERE `uid` = %d)
 497                         AND `gcontact`.`updated` >= '%s'
 498                         AND `gcontact`.`last_contact` >= `gcontact`.`last_failure`
 499                         AND `gcontact`.`network` IN (%s)
 500                         ORDER BY rand() LIMIT %d, %d",
 501                         intval($uid),
 502                         intval($uid),
 503                         intval($uid),
 504                         DBA::NULL_DATETIME,
 505                         $sql_network,
 506                         intval($start),
 507                         intval($limit)
 508                 );
 509
 510                 $list = [];
 511                 foreach ($r2 as $suggestion) {
 512                         $list[$suggestion['nurl']] = $suggestion;
 513                 }
 514
 515                 foreach ($r as $suggestion) {
 516                         $list[$suggestion['nurl']] = $suggestion;
 517                 }
 518
 519                 while (sizeof($list) > ($limit)) {
 520                         array_pop($list);
 521                 }
 522
 523                 return $list;
 524         }
 525
 526         /**
 527          * @return void
 528          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 529          */
 530         public static function updateSuggestions()
 531         {
 532                 $done = [];
 533
 534                 /// @TODO Check if it is really neccessary to poll the own server
 535                 PortableContact::loadWorker(0, 0, 0, DI::baseUrl() . '/poco');
 536
 537                 $done[] = DI::baseUrl() . '/poco';
 538
 539                 if (strlen(DI::config()->get('system', 'directory'))) {
 540                         $x = Network::fetchUrl(Search::getGlobalDirectory() . '/pubsites');
 541                         if (!empty($x)) {
 542                                 $j = json_decode($x);
 543                                 if (!empty($j->entries)) {
 544                                         foreach ($j->entries as $entry) {
 545                                                 GServer::check($entry->url);
 546
 547                                                 $url = $entry->url . '/poco';
 548                                                 if (!in_array($url, $done)) {
 549                                                         PortableContact::loadWorker(0, 0, 0, $url);
 550                                                         $done[] = $url;
 551                                                 }
 552                                         }
 553                                 }
 554                         }
 555                 }
 556
 557                 // Query your contacts from Friendica and Redmatrix/Hubzilla for their contacts
 558                 $contacts = DBA::p("SELECT DISTINCT(`poco`) AS `poco` FROM `contact` WHERE `network` IN (?, ?)", Protocol::DFRN, Protocol::DIASPORA);
 559                 while ($contact = DBA::fetch($contacts)) {
 560                         $base = substr($contact['poco'], 0, strrpos($contact['poco'], '/'));
 561                         if (!in_array($base, $done)) {
 562                                 PortableContact::loadWorker(0, 0, 0, $base);
 563                         }
 564                 }
 565                 DBA::close($contacts);
 566         }
 567
 568         /**
 569          * Removes unwanted parts from a contact url
 570          *
 571          * @param string $url Contact url
 572          *
 573          * @return string Contact url with the wanted parts
 574          * @throws Exception
 575          */
 576         public static function cleanContactUrl($url)
 577         {
 578                 $parts = parse_url($url);
 579
 580                 if (empty($parts['scheme']) || empty($parts['host'])) {
 581                         return $url;
 582                 }
 583
 584                 $new_url = $parts['scheme'] . '://' . $parts['host'];
 585
 586                 if (!empty($parts['port'])) {
 587                         $new_url .= ':' . $parts['port'];
 588                 }
 589
 590                 if (!empty($parts['path'])) {
 591                         $new_url .= $parts['path'];
 592                 }
 593
 594                 if ($new_url != $url) {
 595                         Logger::info('Cleaned contact url', ['url' => $url, 'new_url' => $new_url, 'callstack' => System::callstack()]);
 596                 }
 597
 598                 return $new_url;
 599         }
 600
 601         /**
 602          * Fetch the gcontact id, add an entry if not existed
 603          *
 604          * @param array $contact contact array
 605          *
 606          * @return bool|int Returns false if not found, integer if contact was found
 607          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 608          * @throws \ImagickException
 609          */
 610         public static function getId($contact)
 611         {
 612                 $gcontact_id = 0;
 613
 614                 if (empty($contact['network'])) {
 615                         Logger::notice('Empty network', ['url' => $contact['url'], 'callstack' => System::callstack()]);
 616                         return false;
 617                 }
 618
 619                 if (in_array($contact['network'], [Protocol::PHANTOM])) {
 620                         Logger::notice('Invalid network', ['url' => $contact['url'], 'callstack' => System::callstack()]);
 621                         return false;
 622                 }
 623
 624                 if ($contact['network'] == Protocol::STATUSNET) {
 625                         $contact['network'] = Protocol::OSTATUS;
 626                 }
 627
 628                 // Remove unwanted parts from the contact url (e.g. '?zrl=...')
 629                 if (in_array($contact['network'], Protocol::FEDERATED)) {
 630                         $contact['url'] = self::cleanContactUrl($contact['url']);
 631                 }
 632
 633                 DBA::lock('gcontact');
 634                 $fields = ['id', 'last_contact', 'last_failure', 'network'];
 635                 $gcnt = DBA::selectFirst('gcontact', $fields, ['nurl' => Strings::normaliseLink($contact['url'])]);
 636                 if (DBA::isResult($gcnt)) {
 637                         $gcontact_id = $gcnt['id'];
 638                 } else {
 639                         $contact['location'] = $contact['location'] ?? '';
 640                         $contact['about'] = $contact['about'] ?? '';
 641                         $contact['generation'] = $contact['generation'] ?? 0;
 642                         $contact['hide'] = $contact['hide'] ?? true;
 643
 644                         $fields = ['name' => $contact['name'], 'nick' => $contact['nick'] ?? '', 'addr' => $contact['addr'] ?? '', 'network' => $contact['network'],
 645                                 'url' => $contact['url'], 'nurl' => Strings::normaliseLink($contact['url']), 'photo' => $contact['photo'],
 646                                 'created' => DateTimeFormat::utcNow(), 'updated' => DateTimeFormat::utcNow(), 'location' => $contact['location'],
 647                                 'about' => $contact['about'], 'hide' => $contact['hide'], 'generation' => $contact['generation']];
 648
 649                         DBA::insert('gcontact', $fields);
 650
 651                         $condition = ['nurl' => Strings::normaliseLink($contact['url'])];
 652                         $cnt = DBA::selectFirst('gcontact', ['id', 'network'], $condition, ['order' => ['id']]);
 653                         if (DBA::isResult($cnt)) {
 654                                 $gcontact_id = $cnt['id'];
 655                         }
 656                 }
 657                 DBA::unlock();
 658
 659                 return $gcontact_id;
 660         }
 661
 662         /**
 663          * Updates the gcontact table from a given array
 664          *
 665          * @param array $contact contact array
 666          *
 667          * @return bool|int Returns false if not found, integer if contact was found
 668          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 669          * @throws \ImagickException
 670          */
 671         public static function update($contact)
 672         {
 673                 // Check for invalid "contact-type" value
 674                 if (isset($contact['contact-type']) && (intval($contact['contact-type']) < 0)) {
 675                         $contact['contact-type'] = 0;
 676                 }
 677
 678                 /// @todo update contact table as well
 679
 680                 $gcontact_id = self::getId($contact);
 681
 682                 if (!$gcontact_id) {
 683                         return false;
 684                 }
 685
 686                 $public_contact = DBA::selectFirst('gcontact', [
 687                         'name', 'nick', 'photo', 'location', 'about', 'addr', 'generation', 'birthday', 'keywords', 'gsid',
 688                         'contact-type', 'hide', 'nsfw', 'network', 'alias', 'notify', 'server_url', 'connect', 'updated', 'url'
 689                 ], ['id' => $gcontact_id]);
 690
 691                 if (!DBA::isResult($public_contact)) {
 692                         return false;
 693                 }
 694
 695                 // Get all field names
 696                 $fields = [];
 697                 foreach ($public_contact as $field => $data) {
 698                         $fields[$field] = $data;
 699                 }
 700
 701                 unset($fields['url']);
 702                 unset($fields['updated']);
 703                 unset($fields['hide']);
 704
 705                 // Bugfix: We had an error in the storing of keywords which lead to the "0"
 706                 // This value is still transmitted via poco.
 707                 if (isset($contact['keywords']) && ($contact['keywords'] == '0')) {
 708                         unset($contact['keywords']);
 709                 }
 710
 711                 if (isset($public_contact['keywords']) && ($public_contact['keywords'] == '0')) {
 712                         $public_contact['keywords'] = '';
 713                 }
 714
 715                 // assign all unassigned fields from the database entry
 716                 foreach ($fields as $field => $data) {
 717                         if (empty($contact[$field])) {
 718                                 $contact[$field] = $public_contact[$field];
 719                         }
 720                 }
 721
 722                 if (!isset($contact['hide'])) {
 723                         $contact['hide'] = $public_contact['hide'];
 724                 }
 725
 726                 $fields['hide'] = $public_contact['hide'];
 727
 728                 if ($contact['network'] == Protocol::STATUSNET) {
 729                         $contact['network'] = Protocol::OSTATUS;
 730                 }
 731
 732                 if (!isset($contact['updated'])) {
 733                         $contact['updated'] = DateTimeFormat::utcNow();
 734                 }
 735
 736                 if ($contact['network'] == Protocol::TWITTER) {
 737                         $contact['server_url'] = 'http://twitter.com';
 738                 }
 739
 740                 if (empty($contact['server_url'])) {
 741                         $data = Probe::uri($contact['url']);
 742                         if ($data['network'] != Protocol::PHANTOM) {
 743                                 $contact['server_url'] = $data['baseurl'];
 744                         }
 745                 } else {
 746                         $contact['server_url'] = Strings::normaliseLink($contact['server_url']);
 747                 }
 748
 749                 if (!empty($contact['server_url']) && empty($contact['gsid'])) {
 750                         $contact['gsid'] = GServer::getID($contact['server_url']);
 751                 }
 752
 753                 if (empty($contact['addr']) && !empty($contact['server_url']) && !empty($contact['nick'])) {
 754                         $hostname = str_replace('http://', '', $contact['server_url']);
 755                         $contact['addr'] = $contact['nick'] . '@' . $hostname;
 756                 }
 757
 758                 // Check if any field changed
 759                 $update = false;
 760                 unset($fields['generation']);
 761
 762                 if ((($contact['generation'] > 0) && ($contact['generation'] <= $public_contact['generation'])) || ($public_contact['generation'] == 0)) {
 763                         foreach ($fields as $field => $data) {
 764                                 if ($contact[$field] != $public_contact[$field]) {
 765                                         Logger::debug('Difference found.', ['contact' => $contact['url'], 'field' => $field, 'new' => $contact[$field], 'old' => $public_contact[$field]]);
 766                                         $update = true;
 767                                 }
 768                         }
 769
 770                         if ($contact['generation'] < $public_contact['generation']) {
 771                                 Logger::debug('Difference found.', ['contact' => $contact['url'], 'field' => 'generation', 'new' => $contact['generation'], 'old' => $public_contact['generation']]);
 772                                 $update = true;
 773                         }
 774                 }
 775
 776                 if ($update) {
 777                         Logger::debug('Update gcontact.', ['contact' => $contact['url']]);
 778                         $condition = ["`nurl` = ? AND (`generation` = 0 OR `generation` >= ?)",
 779                                         Strings::normaliseLink($contact['url']), $contact['generation']];
 780                         $contact['updated'] = DateTimeFormat::utc($contact['updated']);
 781
 782                         $updated = [
 783                                 'photo' => $contact['photo'], 'name' => $contact['name'],
 784                                 'nick' => $contact['nick'], 'addr' => $contact['addr'],
 785                                 'network' => $contact['network'], 'birthday' => $contact['birthday'],
 786                                 'keywords' => $contact['keywords'],
 787                                 'hide' => $contact['hide'], 'nsfw' => $contact['nsfw'],
 788                                 'contact-type' => $contact['contact-type'], 'alias' => $contact['alias'],
 789                                 'notify' => $contact['notify'], 'url' => $contact['url'],
 790                                 'location' => $contact['location'], 'about' => $contact['about'],
 791                                 'generation' => $contact['generation'], 'updated' => $contact['updated'],
 792                                 'server_url' => $contact['server_url'], 'connect' => $contact['connect'],
 793                                 'gsid' => $contact['gsid']
 794                         ];
 795
 796                         DBA::update('gcontact', $updated, $condition, $fields);
 797                 }
 798
 799                 return $gcontact_id;
 800         }
 801
 802         /**
 803          * Set the last date that the contact had posted something
 804          *
 805          * @param string $data  Probing result
 806          * @param bool   $force force updating
 807          */
 808         public static function setLastUpdate(array $data, bool $force = false)
 809         {
 810                 // Fetch the global contact
 811                 $gcontact = DBA::selectFirst('gcontact', ['created', 'updated', 'last_contact', 'last_failure'],
 812                         ['nurl' => Strings::normaliseLink($data['url'])]);
 813                 if (!DBA::isResult($gcontact)) {
 814                         return;
 815                 }
 816
 817                 if (!$force && !GServer::updateNeeded($gcontact['created'], $gcontact['updated'], $gcontact['last_failure'], $gcontact['last_contact'])) {
 818                         Logger::info("Don't update profile", ['url' => $data['url'], 'updated' => $gcontact['updated']]);
 819                         return;
 820                 }
 821
 822                 if (self::updateFromNoScrape($data)) {
 823                         return;
 824                 }
 825
 826                 if (!empty($data['outbox'])) {
 827                         self::updateFromOutbox($data['outbox'], $data);
 828                 } elseif (!empty($data['poll']) && ($data['network'] == Protocol::ACTIVITYPUB)) {
 829                         self::updateFromOutbox($data['poll'], $data);
 830                 } elseif (!empty($data['poll'])) {
 831                         self::updateFromFeed($data);
 832                 }
 833         }
 834
 835         /**
 836          * Update a global contact via the "noscrape" endpoint
 837          *
 838          * @param string $data Probing result
 839          *
 840          * @return bool 'true' if update was successful or the server was unreachable
 841          */
 842         private static function updateFromNoScrape(array $data)
 843         {
 844                 // Check the 'noscrape' endpoint when it is a Friendica server
 845                 $gserver = DBA::selectFirst('gserver', ['noscrape'], ["`nurl` = ? AND `noscrape` != ''",
 846                 Strings::normaliseLink($data['baseurl'])]);
 847                 if (!DBA::isResult($gserver)) {
 848                         return false;
 849                 }
 850
 851                 $curlResult = Network::curl($gserver['noscrape'] . '/' . $data['nick']);
 852
 853                 if ($curlResult->isSuccess() && !empty($curlResult->getBody())) {
 854                         $noscrape = json_decode($curlResult->getBody(), true);
 855                         if (!empty($noscrape) && !empty($noscrape['updated'])) {
 856                                 $noscrape['updated'] = DateTimeFormat::utc($noscrape['updated'], DateTimeFormat::MYSQL);
 857                                 $fields = ['last_contact' => DateTimeFormat::utcNow(), 'updated' => $noscrape['updated']];
 858                                 DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($data['url'])]);
 859                                 return true;
 860                         }
 861                 } elseif ($curlResult->isTimeout()) {
 862                         // On a timeout return the existing value, but mark the contact as failure
 863                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 864                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($data['url'])]);
 865                         return true;
 866                 }
 867                 return false;
 868         }
 869
 870         /**
 871          * Update a global contact via an ActivityPub Outbox
 872          *
 873          * @param string $feed
 874          * @param array  $data Probing result
 875          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 876          */
 877         private static function updateFromOutbox(string $feed, array $data)
 878         {
 879                 $outbox = ActivityPub::fetchContent($feed);
 880                 if (empty($outbox)) {
 881                         return;
 882                 }
 883
 884                 if (!empty($outbox['orderedItems'])) {
 885                         $items = $outbox['orderedItems'];
 886                 } elseif (!empty($outbox['first']['orderedItems'])) {
 887                         $items = $outbox['first']['orderedItems'];
 888                 } elseif (!empty($outbox['first']['href']) && ($outbox['first']['href'] != $feed)) {
 889                         self::updateFromOutbox($outbox['first']['href'], $data);
 890                         return;
 891                 } elseif (!empty($outbox['first'])) {
 892                         if (is_string($outbox['first']) && ($outbox['first'] != $feed)) {
 893                                 self::updateFromOutbox($outbox['first'], $data);
 894                         } else {
 895                                 Logger::warning('Unexpected data', ['outbox' => $outbox]);
 896                         }
 897                         return;
 898                 } else {
 899                         $items = [];
 900                 }
 901
 902                 $last_updated = '';
 903                 foreach ($items as $activity) {
 904                         if (!empty($activity['published'])) {
 905                                 $published =  DateTimeFormat::utc($activity['published']);
 906                         } elseif (!empty($activity['object']['published'])) {
 907                                 $published =  DateTimeFormat::utc($activity['object']['published']);
 908                         } else {
 909                                 continue;
 910                         }
 911
 912                         if ($last_updated < $published) {
 913                                 $last_updated = $published;
 914                         }
 915                 }
 916
 917                 if (empty($last_updated)) {
 918                         return;
 919                 }
 920
 921                 $fields = ['last_contact' => DateTimeFormat::utcNow(), 'updated' => $last_updated];
 922                 DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($data['url'])]);
 923         }
 924
 925         /**
 926          * Update a global contact via an XML feed
 927          *
 928          * @param string $data Probing result
 929          */
 930         private static function updateFromFeed(array $data)
 931         {
 932                 // Search for the newest entry in the feed
 933                 $curlResult = Network::curl($data['poll']);
 934                 if (!$curlResult->isSuccess()) {
 935                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
 936                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($data['url'])]);
 937
 938                         Logger::info("Profile wasn't reachable (no feed)", ['url' => $data['url']]);
 939                         return;
 940                 }
 941
 942                 $doc = new DOMDocument();
 943                 @$doc->loadXML($curlResult->getBody());
 944
 945                 $xpath = new DOMXPath($doc);
 946                 $xpath->registerNamespace('atom', 'http://www.w3.org/2005/Atom');
 947
 948                 $entries = $xpath->query('/atom:feed/atom:entry');
 949
 950                 $last_updated = '';
 951
 952                 foreach ($entries as $entry) {
 953                         $published_item = $xpath->query('atom:published/text()', $entry)->item(0);
 954                         $updated_item   = $xpath->query('atom:updated/text()'  , $entry)->item(0);
 955                         $published      = !empty($published_item->nodeValue) ? DateTimeFormat::utc($published_item->nodeValue) : null;
 956                         $updated        = !empty($updated_item->nodeValue) ? DateTimeFormat::utc($updated_item->nodeValue) : null;
 957
 958                         if (empty($published) || empty($updated)) {
 959                                 Logger::notice('Invalid entry for XPath.', ['entry' => $entry, 'url' => $data['url']]);
 960                                 continue;
 961                         }
 962
 963                         if ($last_updated < $published) {
 964                                 $last_updated = $published;
 965                         }
 966
 967                         if ($last_updated < $updated) {
 968                                 $last_updated = $updated;
 969                         }
 970                 }
 971
 972                 if (empty($last_updated)) {
 973                         return;
 974                 }
 975
 976                 $fields = ['last_contact' => DateTimeFormat::utcNow(), 'updated' => $last_updated];
 977                 DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($data['url'])]);
 978         }
 979         /**
 980          * Updates the gcontact entry from a given public contact id
 981          *
 982          * @param integer $cid contact id
 983          * @return void
 984          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 985          * @throws \ImagickException
 986          */
 987         public static function updateFromPublicContactID($cid)
 988         {
 989                 self::updateFromPublicContact(['id' => $cid]);
 990         }
 991
 992         /**
 993          * Updates the gcontact entry from a given public contact url
 994          *
 995          * @param string $url contact url
 996          * @return integer gcontact id
 997          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 998          * @throws \ImagickException
 999          */
1000         public static function updateFromPublicContactURL($url)
1001         {
1002                 return self::updateFromPublicContact(['nurl' => Strings::normaliseLink($url)]);
1003         }
1004
1005         /**
1006          * Helper function for updateFromPublicContactID and updateFromPublicContactURL
1007          *
1008          * @param array $condition contact condition
1009          * @return integer gcontact id
1010          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1011          * @throws \ImagickException
1012          */
1013         private static function updateFromPublicContact($condition)
1014         {
1015                 $fields = ['name', 'nick', 'url', 'nurl', 'location', 'about', 'keywords',
1016                         'bd', 'contact-type', 'network', 'addr', 'notify', 'alias', 'archive', 'term-date',
1017                         'created', 'updated', 'avatar', 'success_update', 'failure_update', 'forum', 'prv',
1018                         'baseurl', 'gsid', 'sensitive', 'unsearchable'];
1019
1020                 $contact = DBA::selectFirst('contact', $fields, array_merge($condition, ['uid' => 0, 'network' => Protocol::FEDERATED]));
1021                 if (!DBA::isResult($contact)) {
1022                         return 0;
1023                 }
1024
1025                 $fields = ['name', 'nick', 'url', 'nurl', 'location', 'about', 'keywords', 'generation',
1026                         'birthday', 'contact-type', 'network', 'addr', 'notify', 'alias', 'archived', 'archive_date',
1027                         'created', 'updated', 'photo', 'last_contact', 'last_failure', 'community', 'connect',
1028                         'server_url', 'gsid', 'nsfw', 'hide', 'id'];
1029
1030                 $old_gcontact = DBA::selectFirst('gcontact', $fields, ['nurl' => $contact['nurl']]);
1031                 $do_insert = !DBA::isResult($old_gcontact);
1032                 if ($do_insert) {
1033                         $old_gcontact = [];
1034                 }
1035
1036                 $gcontact = [];
1037
1038                 // These fields are identical in both contact and gcontact
1039                 $fields = ['name', 'nick', 'url', 'nurl', 'location', 'about', 'keywords', 'gsid',
1040                         'contact-type', 'network', 'addr', 'notify', 'alias', 'created', 'updated'];
1041
1042                 foreach ($fields as $field) {
1043                         $gcontact[$field] = $contact[$field];
1044                 }
1045
1046                 // These fields are having different names but the same content
1047                 $gcontact['server_url'] = $contact['baseurl'] ?? ''; // "baseurl" can be null, "server_url" not
1048                 $gcontact['nsfw'] = $contact['sensitive'];
1049                 $gcontact['hide'] = $contact['unsearchable'];
1050                 $gcontact['archived'] = $contact['archive'];
1051                 $gcontact['archive_date'] = $contact['term-date'];
1052                 $gcontact['birthday'] = $contact['bd'];
1053                 $gcontact['photo'] = $contact['avatar'];
1054                 $gcontact['last_contact'] = $contact['success_update'];
1055                 $gcontact['last_failure'] = $contact['failure_update'];
1056                 $gcontact['community'] = ($contact['forum'] || $contact['prv']);
1057
1058                 foreach (['last_contact', 'last_failure', 'updated'] as $field) {
1059                         if (!empty($old_gcontact[$field]) && ($old_gcontact[$field] >= $gcontact[$field])) {
1060                                 unset($gcontact[$field]);
1061                         }
1062                 }
1063
1064                 if (!$gcontact['archived']) {
1065                         $gcontact['archive_date'] = DBA::NULL_DATETIME;
1066                 }
1067
1068                 if (!empty($old_gcontact['created']) && ($old_gcontact['created'] > DBA::NULL_DATETIME)
1069                         && ($old_gcontact['created'] <= $gcontact['created'])) {
1070                         unset($gcontact['created']);
1071                 }
1072
1073                 if (empty($gcontact['birthday']) && ($gcontact['birthday'] <= DBA::NULL_DATETIME)) {
1074                         unset($gcontact['birthday']);
1075                 }
1076
1077                 if (empty($old_gcontact['generation']) || ($old_gcontact['generation'] > 2)) {
1078                         $gcontact['generation'] = 2; // We fetched the data directly from the other server
1079                 }
1080
1081                 if (!$do_insert) {
1082                         DBA::update('gcontact', $gcontact, ['nurl' => $contact['nurl']], $old_gcontact);
1083                         return $old_gcontact['id'];
1084                 } elseif (!$gcontact['archived']) {
1085                         DBA::insert('gcontact', $gcontact);
1086                         return DBA::lastInsertId();
1087                 }
1088         }
1089
1090         /**
1091          * Updates the gcontact entry from probe
1092          *
1093          * @param string  $url   profile link
1094          * @param boolean $force Optional forcing of network probing (otherwise we use the cached data)
1095          *
1096          * @return boolean 'true' when contact had been updated
1097          *
1098          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1099          * @throws \ImagickException
1100          */
1101         public static function updateFromProbe($url, $force = false)
1102         {
1103                 $data = Probe::uri($url, $force);
1104
1105                 if (in_array($data['network'], [Protocol::PHANTOM])) {
1106                         $fields = ['last_failure' => DateTimeFormat::utcNow()];
1107                         DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($url)]);
1108                         Logger::info('Invalid network for contact', ['url' => $data['url'], 'callstack' => System::callstack()]);
1109                         return false;
1110                 }
1111
1112                 $data['server_url'] = $data['baseurl'];
1113
1114                 self::update($data);
1115
1116                 // Set the date of the latest post
1117                 self::setLastUpdate($data, $force);
1118
1119                 return true;
1120         }
1121
1122         /**
1123          * Update the gcontact entry for a given user id
1124          *
1125          * @param int $uid User ID
1126          * @return bool
1127          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1128          * @throws \ImagickException
1129          */
1130         public static function updateForUser($uid)
1131         {
1132                 $profile = Profile::getByUID($uid);
1133                 if (empty($profile)) {
1134                         Logger::error('Cannot find profile', ['uid' => $uid]);
1135                         return false;
1136                 }
1137
1138                 $user = User::getOwnerDataById($uid);
1139                 if (empty($user)) {
1140                         Logger::error('Cannot find user', ['uid' => $uid]);
1141                         return false;
1142                 }
1143
1144                 $userdata = array_merge($profile, $user);
1145
1146                 $location = Profile::formatLocation(
1147                         ['locality' => $userdata['locality'], 'region' => $userdata['region'], 'country-name' => $userdata['country-name']]
1148                 );
1149
1150                 $gcontact = ['name' => $userdata['name'], 'location' => $location, 'about' => $userdata['about'],
1151                                 'keywords' => $userdata['pub_keywords'],
1152                                 'birthday' => $userdata['dob'], 'photo' => $userdata['photo'],
1153                                 "notify" => $userdata['notify'], 'url' => $userdata['url'],
1154                                 "hide" => !$userdata['net-publish'],
1155                                 'nick' => $userdata['nickname'], 'addr' => $userdata['addr'],
1156                                 "connect" => $userdata['addr'], "server_url" => DI::baseUrl(),
1157                                 "generation" => 1, 'network' => Protocol::DFRN];
1158
1159                 self::update($gcontact);
1160         }
1161
1162         /**
1163          * Get the basepath for a given contact link
1164          *
1165          * @param string $url The gcontact link
1166          * @param boolean $dont_update Don't update the contact
1167          *
1168          * @return string basepath
1169          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1170          * @throws \ImagickException
1171          */
1172         public static function getBasepath($url, $dont_update = false)
1173         {
1174                 $gcontact = DBA::selectFirst('gcontact', ['server_url'], ['nurl' => Strings::normaliseLink($url)]);
1175                 if (!empty($gcontact['server_url'])) {
1176                         return $gcontact['server_url'];
1177                 } elseif ($dont_update) {
1178                         return '';
1179                 }
1180
1181                 self::updateFromProbe($url, true);
1182
1183                 // Fetch the result
1184                 $gcontact = DBA::selectFirst('gcontact', ['server_url'], ['nurl' => Strings::normaliseLink($url)]);
1185                 if (empty($gcontact['server_url'])) {
1186                         Logger::info('No baseurl for gcontact', ['url' => $url]);
1187                         return '';
1188                 }
1189
1190                 Logger::info('Found baseurl for gcontact', ['url' => $url, 'baseurl' => $gcontact['server_url']]);
1191                 return $gcontact['server_url'];
1192         }
1193
1194         /**
1195          * Fetches users of given GNU Social server
1196          *
1197          * If the "Statistics" addon is enabled (See http://gstools.org/ for details) we query user data with this.
1198          *
1199          * @param string $server Server address
1200          * @return bool
1201          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1202          * @throws \ImagickException
1203          */
1204         public static function fetchGsUsers($server)
1205         {
1206                 Logger::info('Fetching users from GNU Social server', ['server' => $server]);
1207
1208                 $url = $server . '/main/statistics';
1209
1210                 $curlResult = Network::curl($url);
1211                 if (!$curlResult->isSuccess()) {
1212                         return false;
1213                 }
1214
1215                 $statistics = json_decode($curlResult->getBody());
1216
1217                 if (!empty($statistics->config->instance_address)) {
1218                         if (!empty($statistics->config->instance_with_ssl)) {
1219                                 $server = 'https://';
1220                         } else {
1221                                 $server = 'http://';
1222                         }
1223
1224                         $server .= $statistics->config->instance_address;
1225
1226                         $hostname = $statistics->config->instance_address;
1227                 } elseif (!empty($statistics->instance_address)) {
1228                         if (!empty($statistics->instance_with_ssl)) {
1229                                 $server = 'https://';
1230                         } else {
1231                                 $server = 'http://';
1232                         }
1233
1234                         $server .= $statistics->instance_address;
1235
1236                         $hostname = $statistics->instance_address;
1237                 }
1238
1239                 if (!empty($statistics->users)) {
1240                         foreach ($statistics->users as $nick => $user) {
1241                                 $profile_url = $server . '/' . $user->nickname;
1242
1243                                 $contact = ['url' => $profile_url,
1244                                                 'name' => $user->fullname,
1245                                                 'addr' => $user->nickname . '@' . $hostname,
1246                                                 'nick' => $user->nickname,
1247                                                 "network" => Protocol::OSTATUS,
1248                                                 'photo' => DI::baseUrl() . '/images/person-300.jpg'];
1249
1250                                 if (isset($user->bio)) {
1251                                         $contact['about'] = $user->bio;
1252                                 }
1253
1254                                 self::getId($contact);
1255                         }
1256                 }
1257         }
1258
1259         /**
1260          * Asking GNU Social server on a regular base for their user data
1261          *
1262          * @return void
1263          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1264          * @throws \ImagickException
1265          */
1266         public static function discoverGsUsers()
1267         {
1268                 $requery_days = intval(DI::config()->get('system', 'poco_requery_days'));
1269
1270                 $last_update = date("c", time() - (60 * 60 * 24 * $requery_days));
1271
1272                 $r = DBA::select('gserver', ['nurl', 'url'], [
1273                         '`network` = ?
1274                         AND `last_contact` >= `last_failure`
1275                         AND `last_poco_query` < ?',
1276                         Protocol::OSTATUS,
1277                         $last_update
1278                 ], [
1279                         'limit' => 5,
1280                         'order' => ['RAND()']
1281                 ]);
1282
1283                 if (!DBA::isResult($r)) {
1284                         return;
1285                 }
1286
1287                 foreach ($r as $server) {
1288                         self::fetchGsUsers($server['url']);
1289                         DBA::update('gserver', ['last_poco_query' => DateTimeFormat::utcNow()], ['nurl' => $server['nurl']]);
1290                 }
1291         }
1292
1293         /**
1294          * Fetches the followers of a given profile and adds them
1295          *
1296          * @param string $url URL of a profile
1297          * @return void
1298          */
1299         public static function discoverFollowers(string $url)
1300         {
1301                 $gcontact = DBA::selectFirst('gcontact', ['id', 'last_discovery'], ['nurl' => Strings::normaliseLink(($url))]);
1302                 if (!DBA::isResult($gcontact)) {
1303                         return;
1304                 }
1305
1306                 if ($gcontact['last_discovery'] > DateTimeFormat::utc('now - 1 month')) {
1307                         Logger::info('Last discovery was less then a month before.', ['url' => $url, 'discovery' => $gcontact['last_discovery']]);
1308                         return;
1309                 }
1310
1311                 $gcid = $gcontact['id'];
1312
1313                 $apcontact = APContact::getByURL($url);
1314
1315                 if (!empty($apcontact['followers']) && is_string($apcontact['followers'])) {
1316                         $followers = ActivityPub::fetchItems($apcontact['followers']);
1317                 } else {
1318                         $followers = [];
1319                 }
1320
1321                 if (!empty($apcontact['following']) && is_string($apcontact['following'])) {
1322                         $followings = ActivityPub::fetchItems($apcontact['following']);
1323                 } else {
1324                         $followings = [];
1325                 }
1326
1327                 if (!empty($followers) || !empty($followings)) {
1328                         if (!empty($followers)) {
1329                                 // Clear the follower list, since it will be recreated in the next step
1330                                 DBA::update('gfollower', ['deleted' => true], ['gcid' => $gcid]);
1331                         }
1332
1333                         $contacts = [];
1334                         foreach (array_merge($followers, $followings) as $contact) {
1335                                 if (is_string($contact)) {
1336                                         $contacts[] = $contact;
1337                                 } elseif (!empty($contact['url']) && is_string($contact['url'])) {
1338                                         $contacts[] = $contact['url'];
1339                                 }
1340                         }
1341                         $contacts = array_unique($contacts);
1342
1343                         Logger::info('Discover AP contacts', ['url' => $url, 'contacts' => count($contacts)]);
1344                         foreach ($contacts as $contact) {
1345                                 $gcontact = DBA::selectFirst('gcontact', ['id'], ['nurl' => Strings::normaliseLink(($contact))]);
1346                                 if (DBA::isResult($gcontact)) {
1347                                         $fields = [];
1348                                         if (in_array($contact, $followers)) {
1349                                                 $fields = ['gcid' => $gcid, 'follower-gcid' => $gcontact['id']];
1350                                         } elseif (in_array($contact, $followings)) {
1351                                                 $fields = ['gcid' => $gcontact['id'], 'follower-gcid' => $gcid];
1352                                         }
1353
1354                                         if (!empty($fields)) {
1355                                                 Logger::info('Set relation between contacts', $fields);
1356                                                 DBA::update('gfollower', ['deleted' => false], $fields, true);
1357                                                 continue;
1358                                         }
1359                                 }
1360
1361                                 if (!Network::isUrlBlocked($contact)) {
1362                                         Logger::info('Discover new AP contact', ['url' => $contact]);
1363                                         Worker::add(PRIORITY_LOW, 'UpdateGContact', $contact, 'nodiscover');
1364                                 } else {
1365                                         Logger::info('No discovery, the URL is blocked.', ['url' => $contact]);
1366                                 }
1367                         }
1368                         if (!empty($followers)) {
1369                                 // Delete all followers that aren't undeleted
1370                                 DBA::delete('gfollower', ['gcid' => $gcid, 'deleted' => true]);
1371                         }
1372
1373                         DBA::update('gcontact', ['last_discovery' => DateTimeFormat::utcNow()], ['id' => $gcid]);
1374                         Logger::info('AP contacts discovery finished, last discovery set', ['url' => $url]);
1375                         return;
1376                 }
1377
1378                 $data = Probe::uri($url);
1379                 if (empty($data['poco'])) {
1380                         return;
1381                 }
1382
1383                 $curlResult = Network::curl($data['poco']);
1384                 if (!$curlResult->isSuccess()) {
1385                         return;
1386                 }
1387                 $poco = json_decode($curlResult->getBody(), true);
1388                 if (empty($poco['entry'])) {
1389                         return;
1390                 }
1391
1392                 Logger::info('PoCo Discovery started', ['url' => $url, 'contacts' => count($poco['entry'])]);
1393
1394                 foreach ($poco['entry'] as $entries) {
1395                         if (!empty($entries['urls'])) {
1396                                 foreach ($entries['urls'] as $entry) {
1397                                         if ($entry['type'] == 'profile') {
1398                                                 if (DBA::exists('gcontact', ['nurl' => Strings::normaliseLink(($entry['value']))])) {
1399                                                         continue;
1400                                                 }
1401                                                 if (!Network::isUrlBlocked($entry['value'])) {
1402                                                         Logger::info('Discover new PoCo contact', ['url' => $entry['value']]);
1403                                                         Worker::add(PRIORITY_LOW, 'UpdateGContact', $entry['value'], 'nodiscover');
1404                                                 } else {
1405                                                         Logger::info('No discovery, the URL is blocked.', ['url' => $entry['value']]);
1406                                                 }
1407                                         }
1408                                 }
1409                         }
1410                 }
1411
1412                 DBA::update('gcontact', ['last_discovery' => DateTimeFormat::utcNow()], ['id' => $gcid]);
1413                 Logger::info('PoCo Discovery finished', ['url' => $url]);
1414         }
1415
1416         /**
1417          * Returns a random, global contact of the current node
1418          *
1419          * @return string The profile URL
1420          * @throws Exception
1421          */
1422         public static function getRandomUrl()
1423         {
1424                 $r = DBA::selectFirst('gcontact', ['url'], [
1425                         '`network` = ?
1426                         AND `last_contact` >= `last_failure`
1427                         AND `updated` > ?',
1428                         Protocol::DFRN,
1429                         DateTimeFormat::utc('now - 1 month'),
1430                 ], ['order' => ['RAND()']]);
1431
1432                 if (DBA::isResult($r)) {
1433                         return $r['url'];
1434                 }
1435
1436                 return '';
1437         }
1438 }