src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   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 Friendica\App\BaseURL;
  25 use Friendica\Contact\Introduction\Exception\IntroductionNotFoundException;
  26 use Friendica\Content\Pager;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Renderer;
  32 use Friendica\Core\Session;
  33 use Friendica\Core\System;
  34 use Friendica\Core\Worker;
  35 use Friendica\Database\Database;
  36 use Friendica\Database\DBA;
  37 use Friendica\DI;
  38 use Friendica\Network\HTTPException;
  39 use Friendica\Network\Probe;
  40 use Friendica\Protocol\Activity;
  41 use Friendica\Protocol\ActivityPub;
  42 use Friendica\Util\DateTimeFormat;
  43 use Friendica\Util\Images;
  44 use Friendica\Util\Network;
  45 use Friendica\Util\Proxy;
  46 use Friendica\Util\Strings;
  47
  48 /**
  49  * functions for interacting with a contact
  50  */
  51 class Contact
  52 {
  53         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  54         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  55         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  56
  57         /**
  58          * @}
  59          */
  60
  61         const LOCK_INSERT = 'contact-insert';
  62
  63         /**
  64          * Account types
  65          *
  66          * TYPE_UNKNOWN - unknown type
  67          *
  68          * TYPE_PERSON - the account belongs to a person
  69          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  70          *
  71          * TYPE_ORGANISATION - the account belongs to an organisation
  72          *      Associated page type: PAGE_SOAPBOX
  73          *
  74          * TYPE_NEWS - the account is a news reflector
  75          *      Associated page type: PAGE_SOAPBOX
  76          *
  77          * TYPE_COMMUNITY - the account is community forum
  78          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
  79          *
  80          * TYPE_RELAY - the account is a relay
  81          *      This will only be assigned to contacts, not to user accounts
  82          * @{
  83          */
  84         const TYPE_UNKNOWN =     -1;
  85         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
  86         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
  87         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
  88         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
  89         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
  90         /**
  91          * @}
  92          */
  93
  94         /**
  95          * Contact_is
  96          *
  97          * Relationship types
  98          * @{
  99          */
 100         const NOTHING  = 0;
 101         const FOLLOWER = 1;
 102         const SHARING  = 2;
 103         const FRIEND   = 3;
 104         const SELF     = 4;
 105         /**
 106          * @}
 107          */
 108
 109          const MIRROR_DEACTIVATED = 0;
 110          const MIRROR_FORWARDED = 1;
 111          const MIRROR_OWN_POST = 2;
 112          const MIRROR_NATIVE_RESHARE = 3;
 113
 114          /**
 115          * @param array $fields    Array of selected fields, empty for all
 116          * @param array $condition Array of fields for condition
 117          * @param array $params    Array of several parameters
 118          * @return array
 119          * @throws \Exception
 120          */
 121         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 122         {
 123                 return DBA::selectToArray('contact', $fields, $condition, $params);
 124         }
 125
 126         /**
 127          * @param array $fields    Array of selected fields, empty for all
 128          * @param array $condition Array of fields for condition
 129          * @param array $params    Array of several parameters
 130          * @return array
 131          * @throws \Exception
 132          */
 133         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 134         {
 135                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 136
 137                 return $contact;
 138         }
 139
 140         /**
 141          * Insert a row into the contact table
 142          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 143          *
 144          * @param array $fields         field array
 145          * @param int   $duplicate_mode Do an update on a duplicate entry
 146          *
 147          * @return int  id of the created contact
 148          * @throws \Exception
 149          */
 150         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 151         {
 152                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 153                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 154                 }
 155
 156                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 157
 158                 if (empty($fields['created'])) {
 159                         $fields['created'] = DateTimeFormat::utcNow();
 160                 }
 161
 162                 DBA::insert('contact', $fields, $duplicate_mode);
 163                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 164                 if (!DBA::isResult($contact)) {
 165                         // Shouldn't happen
 166                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 167                         return 0;
 168                 }
 169
 170                 Contact\User::insertForContactArray($contact);
 171
 172                 // Search for duplicated contacts and get rid of them
 173                 if (!$contact['self']) {
 174                         self::removeDuplicates($contact['nurl'], $contact['uid']);
 175                 }
 176
 177                 return $contact['id'];
 178         }
 179
 180         /**
 181          * Updates rows in the contact table
 182          *
 183          * @param array         $fields     contains the fields that are updated
 184          * @param array         $condition  condition array with the key values
 185          * @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate, false = don't update identical fields)
 186          *
 187          * @return boolean was the update successfull?
 188          * @throws \Exception
 189          */
 190         public static function update(array $fields, array $condition, $old_fields = [])
 191         {
 192                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 193
 194                 // Apply changes to the "user-contact" table on dedicated fields
 195                 Contact\User::updateByContactUpdate($fields, $condition);
 196
 197                 return $ret;
 198         }
 199
 200         /**
 201          * @param integer $id     Contact ID
 202          * @param array   $fields Array of selected fields, empty for all
 203          * @return array|boolean Contact record if it exists, false otherwise
 204          * @throws \Exception
 205          */
 206         public static function getById($id, $fields = [])
 207         {
 208                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 209         }
 210
 211         /**
 212          * Fetch the first contact with the provided uri-id.
 213          *
 214          * @param integer $uri_id uri-id of the contact
 215          * @param array   $fields Array of selected fields, empty for all
 216          * @return array|boolean Contact record if it exists, false otherwise
 217          * @throws \Exception
 218          */
 219         public static function getByUriId($uri_id, $fields = [])
 220         {
 221                 return DBA::selectFirst('contact', $fields, ['uri-id' => $uri_id], ['order' => ['uid']]);
 222         }
 223
 224         /**
 225          * Fetches a contact by a given url
 226          *
 227          * @param string  $url    profile url
 228          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 229          * @param array   $fields Field list
 230          * @param integer $uid    User ID of the contact
 231          * @return array contact array
 232          */
 233         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 234         {
 235                 if ($update || is_null($update)) {
 236                         $cid = self::getIdForURL($url, $uid, $update);
 237                         if (empty($cid)) {
 238                                 return [];
 239                         }
 240
 241                         $contact = self::getById($cid, $fields);
 242                         if (empty($contact)) {
 243                                 return [];
 244                         }
 245                         return $contact;
 246                 }
 247
 248                 // Add internal fields
 249                 $removal = [];
 250                 if (!empty($fields)) {
 251                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 252                                 if (!in_array($internal, $fields)) {
 253                                         $fields[] = $internal;
 254                                         $removal[] = $internal;
 255                                 }
 256                         }
 257                 }
 258
 259                 // We first try the nurl (http://server.tld/nick), most common case
 260                 $options = ['order' => ['id']];
 261                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 262
 263                 // Then the addr (nick@server.tld)
 264                 if (!DBA::isResult($contact)) {
 265                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 266                 }
 267
 268                 // Then the alias (which could be anything)
 269                 if (!DBA::isResult($contact)) {
 270                         // The link could be provided as http although we stored it as https
 271                         $ssl_url = str_replace('http://', 'https://', $url);
 272                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 273                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 274                 }
 275
 276                 if (!DBA::isResult($contact)) {
 277                         return [];
 278                 }
 279
 280                 // Update the contact in the background if needed
 281                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 282                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 283                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 284                 }
 285
 286                 // Remove the internal fields
 287                 foreach ($removal as $internal) {
 288                         unset($contact[$internal]);
 289                 }
 290
 291                 return $contact;
 292         }
 293
 294         /**
 295          * Fetches a contact for a given user by a given url.
 296          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 297          *
 298          * @param string  $url    profile url
 299          * @param integer $uid    User ID of the contact
 300          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 301          * @param array   $fields Field list
 302          * @return array contact array
 303          */
 304         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 305         {
 306                 if ($uid != 0) {
 307                         $contact = self::getByURL($url, $update, $fields, $uid);
 308                         if (!empty($contact)) {
 309                                 if (!empty($contact['id'])) {
 310                                         $contact['cid'] = $contact['id'];
 311                                         $contact['zid'] = 0;
 312                                 }
 313                                 return $contact;
 314                         }
 315                 }
 316
 317                 $contact = self::getByURL($url, $update, $fields);
 318                 if (!empty($contact['id'])) {
 319                         $contact['cid'] = 0;
 320                         $contact['zid'] = $contact['id'];
 321                 }
 322                 return $contact;
 323         }
 324
 325         /**
 326          * Tests if the given contact is a follower
 327          *
 328          * @param int $cid Either public contact id or user's contact id
 329          * @param int $uid User ID
 330          *
 331          * @return boolean is the contact id a follower?
 332          * @throws HTTPException\InternalServerErrorException
 333          * @throws \ImagickException
 334          */
 335         public static function isFollower($cid, $uid)
 336         {
 337                 if (Contact\User::isBlocked($cid, $uid)) {
 338                         return false;
 339                 }
 340
 341                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 342                 if (empty($cdata['user'])) {
 343                         return false;
 344                 }
 345
 346                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 347                 return DBA::exists('contact', $condition);
 348         }
 349
 350         /**
 351          * Tests if the given contact url is a follower
 352          *
 353          * @param string $url Contact URL
 354          * @param int    $uid User ID
 355          *
 356          * @return boolean is the contact id a follower?
 357          * @throws HTTPException\InternalServerErrorException
 358          * @throws \ImagickException
 359          */
 360         public static function isFollowerByURL($url, $uid)
 361         {
 362                 $cid = self::getIdForURL($url, $uid);
 363
 364                 if (empty($cid)) {
 365                         return false;
 366                 }
 367
 368                 return self::isFollower($cid, $uid);
 369         }
 370
 371         /**
 372          * Tests if the given user follow the given contact
 373          *
 374          * @param int $cid Either public contact id or user's contact id
 375          * @param int $uid User ID
 376          *
 377          * @return boolean is the contact url being followed?
 378          * @throws HTTPException\InternalServerErrorException
 379          * @throws \ImagickException
 380          */
 381         public static function isSharing($cid, $uid)
 382         {
 383                 if (Contact\User::isBlocked($cid, $uid)) {
 384                         return false;
 385                 }
 386
 387                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 388                 if (empty($cdata['user'])) {
 389                         return false;
 390                 }
 391
 392                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 393                 return DBA::exists('contact', $condition);
 394         }
 395
 396         /**
 397          * Tests if the given user follow the given contact url
 398          *
 399          * @param string $url Contact URL
 400          * @param int    $uid User ID
 401          *
 402          * @return boolean is the contact url being followed?
 403          * @throws HTTPException\InternalServerErrorException
 404          * @throws \ImagickException
 405          */
 406         public static function isSharingByURL($url, $uid)
 407         {
 408                 $cid = self::getIdForURL($url, $uid);
 409
 410                 if (empty($cid)) {
 411                         return false;
 412                 }
 413
 414                 return self::isSharing($cid, $uid);
 415         }
 416
 417         /**
 418          * Get the basepath for a given contact link
 419          *
 420          * @param string $url The contact link
 421          * @param boolean $dont_update Don't update the contact
 422          *
 423          * @return string basepath
 424          * @throws HTTPException\InternalServerErrorException
 425          * @throws \ImagickException
 426          */
 427         public static function getBasepath($url, $dont_update = false)
 428         {
 429                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 430                 if (!DBA::isResult($contact)) {
 431                         return '';
 432                 }
 433
 434                 if (!empty($contact['baseurl'])) {
 435                         return $contact['baseurl'];
 436                 } elseif ($dont_update) {
 437                         return '';
 438                 }
 439
 440                 // Update the existing contact
 441                 self::updateFromProbe($contact['id']);
 442
 443                 // And fetch the result
 444                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 445                 if (empty($contact['baseurl'])) {
 446                         Logger::info('No baseurl for contact', ['url' => $url]);
 447                         return '';
 448                 }
 449
 450                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 451                 return $contact['baseurl'];
 452         }
 453
 454         /**
 455          * Check if the given contact url is on the same server
 456          *
 457          * @param string $url The contact link
 458          *
 459          * @return boolean Is it the same server?
 460          */
 461         public static function isLocal($url)
 462         {
 463                 if (!parse_url($url, PHP_URL_SCHEME)) {
 464                         $addr_parts = explode('@', $url);
 465                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 466                 }
 467
 468                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 469         }
 470
 471         /**
 472          * Check if the given contact ID is on the same server
 473          *
 474          * @param string $url The contact link
 475          *
 476          * @return boolean Is it the same server?
 477          */
 478         public static function isLocalById(int $cid)
 479         {
 480                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 481                 if (!DBA::isResult($contact)) {
 482                         return false;
 483                 }
 484
 485                 if (empty($contact['baseurl'])) {
 486                         $baseurl = self::getBasepath($contact['url'], true);
 487                 } else {
 488                         $baseurl = $contact['baseurl'];
 489                 }
 490
 491                 return Strings::compareLink($baseurl, DI::baseUrl());
 492         }
 493
 494         /**
 495          * Returns the public contact id of the given user id
 496          *
 497          * @param  integer $uid User ID
 498          *
 499          * @return integer|boolean Public contact id for given user id
 500          * @throws \Exception
 501          */
 502         public static function getPublicIdByUserId($uid)
 503         {
 504                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 505                 if (!DBA::isResult($self)) {
 506                         return false;
 507                 }
 508                 return self::getIdForURL($self['url']);
 509         }
 510
 511         /**
 512          * Returns the contact id for the user and the public contact id for a given contact id
 513          *
 514          * @param int $cid Either public contact id or user's contact id
 515          * @param int $uid User ID
 516          *
 517          * @return array with public and user's contact id
 518          * @throws HTTPException\InternalServerErrorException
 519          * @throws \ImagickException
 520          */
 521         public static function getPublicAndUserContactID($cid, $uid)
 522         {
 523                 // We have to use the legacy function as long as the post update hasn't finished
 524                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 525                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 526                 }
 527
 528                 if (empty($uid) || empty($cid)) {
 529                         return [];
 530                 }
 531
 532                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 533                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 534                         return [];
 535                 }
 536
 537                 $pcid = $contact['pid'];
 538                 if ($contact['uid'] == $uid) {
 539                         $ucid = $contact['id'];
 540                 } else {
 541                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 542                         if (DBA::isResult($contact)) {
 543                                 $ucid = $contact['id'];
 544                         } else {
 545                                 $ucid = 0;
 546                         }
 547                 }
 548
 549                 return ['public' => $pcid, 'user' => $ucid];
 550         }
 551
 552         /**
 553          * Helper function for "getPublicAndUserContactID"
 554          *
 555          * @param int $cid Either public contact id or user's contact id
 556          * @param int $uid User ID
 557          *
 558          * @return array with public and user's contact id
 559          * @throws HTTPException\InternalServerErrorException
 560          * @throws \ImagickException
 561          */
 562         private static function legacyGetPublicAndUserContactID($cid, $uid)
 563         {
 564                 if (empty($uid) || empty($cid)) {
 565                         return [];
 566                 }
 567
 568                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 569                 if (!DBA::isResult($contact)) {
 570                         return [];
 571                 }
 572
 573                 // We quit when the user id don't match the user id of the provided contact
 574                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 575                         return [];
 576                 }
 577
 578                 if ($contact['uid'] != 0) {
 579                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 580                         if (empty($pcid)) {
 581                                 return [];
 582                         }
 583                         $ucid = $contact['id'];
 584                 } else {
 585                         $pcid = $contact['id'];
 586                         $ucid = self::getIdForURL($contact['url'], $uid);
 587                 }
 588
 589                 return ['public' => $pcid, 'user' => $ucid];
 590         }
 591
 592         /**
 593          * Returns contact details for a given contact id in combination with a user id
 594          *
 595          * @param int $cid A contact ID
 596          * @param int $uid The User ID
 597          * @param array $fields The selected fields for the contact
 598          *
 599          * @return array The contact details
 600          *
 601          * @throws \Exception
 602          */
 603         public static function getContactForUser($cid, $uid, array $fields = [])
 604         {
 605                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 606
 607                 if (!DBA::isResult($contact)) {
 608                         return [];
 609                 } else {
 610                         return $contact;
 611                 }
 612         }
 613
 614         /**
 615          * Creates the self-contact for the provided user id
 616          *
 617          * @param int $uid
 618          * @return bool Operation success
 619          * @throws HTTPException\InternalServerErrorException
 620          */
 621         public static function createSelfFromUserId($uid)
 622         {
 623                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 624                         ['uid' => $uid, 'account_expired' => false]);
 625                 if (!DBA::isResult($user)) {
 626                         return false;
 627                 }
 628
 629                 $contact = [
 630                         'uid'         => $user['uid'],
 631                         'created'     => DateTimeFormat::utcNow(),
 632                         'self'        => 1,
 633                         'name'        => $user['username'],
 634                         'nick'        => $user['nickname'],
 635                         'pubkey'      => $user['pubkey'],
 636                         'prvkey'      => $user['prvkey'],
 637                         'photo'       => User::getAvatarUrl($user),
 638                         'thumb'       => User::getAvatarUrl($user, Proxy::SIZE_THUMB),
 639                         'micro'       => User::getAvatarUrl($user, Proxy::SIZE_MICRO),
 640                         'blocked'     => 0,
 641                         'pending'     => 0,
 642                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 643                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 644                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 645                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 646                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 647                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 648                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 649                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 650                         'name-date'   => DateTimeFormat::utcNow(),
 651                         'uri-date'    => DateTimeFormat::utcNow(),
 652                         'avatar-date' => DateTimeFormat::utcNow(),
 653                         'closeness'   => 0
 654                 ];
 655
 656                 $return = true;
 657
 658                 // Only create the entry if it doesn't exist yet
 659                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 660                         $return = (bool)self::insert($contact);
 661                 }
 662
 663                 // Create the public contact
 664                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 665                         $contact['self']   = false;
 666                         $contact['uid']    = 0;
 667                         $contact['prvkey'] = null;
 668
 669                         self::insert($contact, Database::INSERT_IGNORE);
 670                 }
 671
 672                 return $return;
 673         }
 674
 675         /**
 676          * Updates the self-contact for the provided user id
 677          *
 678          * @param int     $uid
 679          * @param boolean $update_avatar Force the avatar update
 680          * @return bool   "true" if updated
 681          * @throws HTTPException\InternalServerErrorException
 682          */
 683         public static function updateSelfFromUserID($uid, $update_avatar = false)
 684         {
 685                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey', 'manually-approve',
 686                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 687                         'photo', 'thumb', 'micro', 'header', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 688                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 689                 if (!DBA::isResult($self)) {
 690                         return false;
 691                 }
 692
 693                 $fields = ['uid', 'nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 694                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 695                 if (!DBA::isResult($user)) {
 696                         return false;
 697                 }
 698
 699                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 700                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 701                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 702                 if (!DBA::isResult($profile)) {
 703                         return false;
 704                 }
 705
 706                 $file_suffix = 'jpg';
 707
 708                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 709                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 710                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 711                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 712                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'matrix' => $profile['matrix'], 'network' => Protocol::DFRN];
 713
 714                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 715                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 716                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 717                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 718                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 719                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 720                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 721                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 722                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 723
 724                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 725                 if (DBA::isResult($avatar)) {
 726                         if ($update_avatar) {
 727                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 728                         }
 729
 730                         // Creating the path to the avatar, beginning with the file suffix
 731                         $types = Images::supportedTypes();
 732                         if (isset($types[$avatar['type']])) {
 733                                 $file_suffix = $types[$avatar['type']];
 734                         }
 735
 736                         // We are adding a timestamp value so that other systems won't use cached content
 737                         $timestamp = strtotime($fields['avatar-date']);
 738
 739                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 740                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 741
 742                         $fields['photo'] = $prefix . '4' . $suffix;
 743                         $fields['thumb'] = $prefix . '5' . $suffix;
 744                         $fields['micro'] = $prefix . '6' . $suffix;
 745                 } else {
 746                         // We hadn't found a photo entry, so we use the default avatar
 747                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 748                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 749                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 750                 }
 751
 752                 $fields['avatar'] = User::getAvatarUrl($user);
 753                 $fields['header'] = User::getBannerUrl($user);
 754                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 755                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 756                 $fields['unsearchable'] = !$profile['net-publish'];
 757                 $fields['manually-approve'] = in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
 758
 759                 $update = false;
 760
 761                 foreach ($fields as $field => $content) {
 762                         if ($self[$field] != $content) {
 763                                 $update = true;
 764                         }
 765                 }
 766
 767                 if ($update) {
 768                         if ($fields['name'] != $self['name']) {
 769                                 $fields['name-date'] = DateTimeFormat::utcNow();
 770                         }
 771                         $fields['updated'] = DateTimeFormat::utcNow();
 772                         self::update($fields, ['id' => $self['id']]);
 773
 774                         // Update the public contact as well
 775                         $fields['prvkey'] = null;
 776                         $fields['self']   = false;
 777                         self::update($fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 778
 779                         // Update the profile
 780                         $fields = [
 781                                 'photo' => User::getAvatarUrl($user),
 782                                 'thumb' => User::getAvatarUrl($user, Proxy::SIZE_THUMB)
 783                         ];
 784
 785                         DBA::update('profile', $fields, ['uid' => $uid]);
 786                 }
 787
 788                 return $update;
 789         }
 790
 791         /**
 792          * Marks a contact for removal
 793          *
 794          * @param int $id contact id
 795          * @throws HTTPException\InternalServerErrorException
 796          */
 797         public static function remove($id)
 798         {
 799                 // We want just to make sure that we don't delete our "self" contact
 800                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 801                 if (!DBA::isResult($contact)) {
 802                         return;
 803                 }
 804
 805                 // Archive the contact
 806                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 807
 808                 // Delete it in the background
 809                 Worker::add(PRIORITY_MEDIUM, 'Contact\Remove', $id);
 810         }
 811
 812         /**
 813          * Unfollow the remote contact
 814          *
 815          * @param array $contact Target user-specific contact (uid != 0) array
 816          * @throws HTTPException\InternalServerErrorException
 817          * @throws \ImagickException
 818          */
 819         public static function unfollow(array $contact): void
 820         {
 821                 if (empty($contact['network'])) {
 822                         throw new \InvalidArgumentException('Empty network in contact array');
 823                 }
 824
 825                 if (empty($contact['uid'])) {
 826                         throw new \InvalidArgumentException('Unexpected public contact record');
 827                 }
 828
 829                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 830                         $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 831                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 832                 }
 833
 834                 self::removeSharer($contact);
 835         }
 836
 837         /**
 838          * Revoke follow privileges of the remote user contact
 839          *
 840          * The local relationship is updated immediately, the eventual remote server is messaged in the background.
 841          *
 842          * @param array $contact User-specific contact array (uid != 0) to revoke the follow from
 843          * @throws HTTPException\InternalServerErrorException
 844          * @throws \ImagickException
 845          */
 846         public static function revokeFollow(array $contact): void
 847         {
 848                 if (empty($contact['network'])) {
 849                         throw new \InvalidArgumentException('Empty network in contact array');
 850                 }
 851
 852                 if (empty($contact['uid'])) {
 853                         throw new \InvalidArgumentException('Unexpected public contact record');
 854                 }
 855
 856                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 857                         $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 858                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 859                 }
 860
 861                 self::removeFollower($contact);
 862         }
 863
 864         /**
 865          * Completely severs a relationship with a contact
 866          *
 867          * @param array $contact User-specific contact (uid != 0) array
 868          * @throws HTTPException\InternalServerErrorException
 869          * @throws \ImagickException
 870          */
 871         public static function terminateFriendship(array $contact)
 872         {
 873                 if (empty($contact['network'])) {
 874                         throw new \InvalidArgumentException('Empty network in contact array');
 875                 }
 876
 877                 if (empty($contact['uid'])) {
 878                         throw new \InvalidArgumentException('Unexpected public contact record');
 879                 }
 880
 881                 $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 882
 883                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 884                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 885                 }
 886
 887                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 888                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 889                 }
 890
 891                 self::remove($contact['id']);
 892         }
 893
 894
 895         /**
 896          * Marks a contact for archival after a communication issue delay
 897          *
 898          * Contact has refused to recognise us as a friend. We will start a countdown.
 899          * If they still don't recognise us in 32 days, the relationship is over,
 900          * and we won't waste any more time trying to communicate with them.
 901          * This provides for the possibility that their database is temporarily messed
 902          * up or some other transient event and that there's a possibility we could recover from it.
 903          *
 904          * @param array $contact contact to mark for archival
 905          * @return null
 906          * @throws HTTPException\InternalServerErrorException
 907          */
 908         public static function markForArchival(array $contact)
 909         {
 910                 if (!isset($contact['url']) && !empty($contact['id'])) {
 911                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 912                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 913                         if (!DBA::isResult($contact)) {
 914                                 return;
 915                         }
 916                 } elseif (!isset($contact['url'])) {
 917                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 918                 }
 919
 920                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 921
 922                 // Contact already archived or "self" contact? => nothing to do
 923                 if ($contact['archive'] || $contact['self']) {
 924                         return;
 925                 }
 926
 927                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 928                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 929                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 930                 } else {
 931                         /* @todo
 932                          * We really should send a notification to the owner after 2-3 weeks
 933                          * so they won't be surprised when the contact vanishes and can take
 934                          * remedial action if this was a serious mistake or glitch
 935                          */
 936
 937                         /// @todo Check for contact vitality via probing
 938                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 939
 940                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 941                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 942                                 /* Relationship is really truly dead. archive them rather than
 943                                  * delete, though if the owner tries to unarchive them we'll start
 944                                  * the whole process over again.
 945                                  */
 946                                 self::update(['archive' => true], ['id' => $contact['id']]);
 947                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 948                         }
 949                 }
 950         }
 951
 952         /**
 953          * Cancels the archival countdown
 954          *
 955          * @see   Contact::markForArchival()
 956          *
 957          * @param array $contact contact to be unmarked for archival
 958          * @return null
 959          * @throws \Exception
 960          */
 961         public static function unmarkForArchival(array $contact)
 962         {
 963                 // Always unarchive the relay contact entry
 964                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 965                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 966                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 967                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 968                                 self::update($fields, $condition);
 969                         }
 970                 }
 971
 972                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 973                 $exists = DBA::exists('contact', $condition);
 974
 975                 // We don't need to update, we never marked this contact for archival
 976                 if (!$exists) {
 977                         return;
 978                 }
 979
 980                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 981
 982                 if (!isset($contact['url']) && !empty($contact['id'])) {
 983                         $fields = ['id', 'url', 'batch'];
 984                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 985                         if (!DBA::isResult($contact)) {
 986                                 return;
 987                         }
 988                 }
 989
 990                 // It's a miracle. Our dead contact has inexplicably come back to life.
 991                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 992                 self::update($fields, ['id' => $contact['id']]);
 993                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 994         }
 995
 996         /**
 997          * Returns the data array for the photo menu of a given contact
 998          *
 999          * @param array $contact contact
1000          * @param int   $uid     optional, default 0
1001          * @return array
1002          * @throws HTTPException\InternalServerErrorException
1003          * @throws \ImagickException
1004          */
1005         public static function photoMenu(array $contact, $uid = 0)
1006         {
1007                 $pm_url = '';
1008                 $status_link = '';
1009                 $photos_link = '';
1010                 $poke_link = '';
1011
1012                 if ($uid == 0) {
1013                         $uid = local_user();
1014                 }
1015
1016                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1017                         if ($uid == 0) {
1018                                 $profile_link = self::magicLinkByContact($contact);
1019                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1020
1021                                 return $menu;
1022                         }
1023
1024                         // Look for our own contact if the uid doesn't match and isn't public
1025                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1026                         if (DBA::isResult($contact_own)) {
1027                                 return self::photoMenu($contact_own, $uid);
1028                         }
1029                 }
1030
1031                 $sparkle = false;
1032                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1033                         $sparkle = true;
1034                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1035                 } else {
1036                         $profile_link = $contact['url'];
1037                 }
1038
1039                 if ($profile_link === 'mailbox') {
1040                         $profile_link = '';
1041                 }
1042
1043                 if ($sparkle) {
1044                         $status_link = $profile_link . '/status';
1045                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1046                         $profile_link = $profile_link . '/profile';
1047                 }
1048
1049                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1050                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1051                 }
1052
1053                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1054                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1055                 }
1056
1057                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1058
1059                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1060
1061                 $follow_link = '';
1062                 $unfollow_link = '';
1063                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1064                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1065                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1066                         } elseif(!$contact['pending']) {
1067                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1068                         }
1069                 }
1070
1071                 /**
1072                  * Menu array:
1073                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1074                  */
1075                 if (empty($contact['uid'])) {
1076                         $menu = [
1077                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1078                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1079                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1080                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1081                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1082                         ];
1083                 } else {
1084                         $menu = [
1085                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1086                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1087                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1088                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1089                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1090                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1091                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1092                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1093                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1094                         ];
1095
1096                         if (!empty($contact['pending'])) {
1097                                 try {
1098                                         $intro = DI::intro()->selectForContact($contact['id']);
1099                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1100                                 } catch (IntroductionNotFoundException $exception) {
1101                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1102                                 }
1103                         }
1104                 }
1105
1106                 $args = ['contact' => $contact, 'menu' => &$menu];
1107
1108                 Hook::callAll('contact_photo_menu', $args);
1109
1110                 $menucondensed = [];
1111
1112                 foreach ($menu as $menuname => $menuitem) {
1113                         if ($menuitem[1] != '') {
1114                                 $menucondensed[$menuname] = $menuitem;
1115                         }
1116                 }
1117
1118                 return $menucondensed;
1119         }
1120
1121         /**
1122          * Fetch the contact id for a given URL and user
1123          *
1124          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1125          * `addr` or `alias`.
1126          *
1127          * If there's no record and we aren't looking for a public contact, we quit.
1128          * If there's one, we check that it isn't time to update the picture else we
1129          * directly return the found contact id.
1130          *
1131          * Second, we probe the provided $url whether it's http://server.tld/profile or
1132          * nick@server.tld. We quit if we can't get any info back.
1133          *
1134          * Third, we create the contact record if it doesn't exist
1135          *
1136          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1137          * if there's any updates
1138          *
1139          * @param string  $url       Contact URL
1140          * @param integer $uid       The user id for the contact (0 = public contact)
1141          * @param boolean $update    true = always update, false = never update, null = update when not found
1142          * @param array   $default   Default value for creating the contact when everything else fails
1143          *
1144          * @return integer Contact ID
1145          * @throws HTTPException\InternalServerErrorException
1146          * @throws \ImagickException
1147          */
1148         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1149         {
1150                 $contact_id = 0;
1151
1152                 if ($url == '') {
1153                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1154                         return 0;
1155                 }
1156
1157                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1158
1159                 if (!empty($contact)) {
1160                         $contact_id = $contact["id"];
1161
1162                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1163                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1164                                 return $contact_id;
1165                         }
1166                 } elseif ($uid != 0) {
1167                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1168                         return 0;
1169                 } elseif (empty($default) && !is_null($update) && !$update) {
1170                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1171                         return 0;
1172                 }
1173
1174                 $data = [];
1175
1176                 if (empty($default['network']) || $update) {
1177                         $data = Probe::uri($url, "", $uid);
1178
1179                         // Take the default values when probing failed
1180                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1181                                 $data = array_merge($data, $default);
1182                         }
1183                 } elseif (!empty($default['network'])) {
1184                         $data = $default;
1185                 }
1186
1187                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1188                         // Fetch data for the public contact via the first found personal contact
1189                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1190                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1191                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1192                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1193
1194                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1195                         if (!DBA::isResult($personal_contact)) {
1196                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1197                         }
1198
1199                         if (DBA::isResult($personal_contact)) {
1200                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1201                                 $data = $personal_contact;
1202                                 $data['photo'] = $personal_contact['avatar'];
1203                                 $data['account-type'] = $personal_contact['contact-type'];
1204                                 $data['hide'] = $personal_contact['unsearchable'];
1205                                 unset($data['avatar']);
1206                                 unset($data['contact-type']);
1207                                 unset($data['unsearchable']);
1208                         }
1209                 }
1210
1211                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1212                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1213                         return 0;
1214                 }
1215
1216                 if (!$contact_id) {
1217                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1218                         if (!empty($data['alias'])) {
1219                                 $urls[] = Strings::normaliseLink($data['alias']);
1220                         }
1221                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1222                         if (!empty($contact['id'])) {
1223                                 $contact_id = $contact['id'];
1224                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1225                         }
1226                 }
1227
1228                 if (!$contact_id) {
1229                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1230                         $fields = [
1231                                 'uid'       => $uid,
1232                                 'url'       => $data['url'],
1233                                 'nurl'      => Strings::normaliseLink($data['url']),
1234                                 'network'   => $data['network'],
1235                                 'created'   => DateTimeFormat::utcNow(),
1236                                 'rel'       => self::SHARING,
1237                                 'writable'  => 1,
1238                                 'blocked'   => 0,
1239                                 'readonly'  => 0,
1240                                 'pending'   => 0];
1241
1242                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1243
1244                         // Before inserting we do check if the entry does exist now.
1245                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1246                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1247                                 if (DBA::isResult($contact)) {
1248                                         $contact_id = $contact['id'];
1249                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1250                                 } else {
1251                                         $contact_id = self::insert($fields);
1252                                         if ($contact_id) {
1253                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1254                                         }
1255                                 }
1256                                 DI::lock()->release(self::LOCK_INSERT);
1257                         } else {
1258                                 Logger::warning('Contact lock had not been acquired');
1259                         }
1260
1261                         if (!$contact_id) {
1262                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1263                                 return 0;
1264                         }
1265                 } else {
1266                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1267                 }
1268
1269                 if ($data['network'] == Protocol::DIASPORA) {
1270                         FContact::updateFromProbeArray($data);
1271                 }
1272
1273                 self::updateFromProbeArray($contact_id, $data);
1274
1275                 // Don't return a number for a deleted account
1276                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1277                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1278                         return 0;
1279                 }
1280
1281                 return $contact_id;
1282         }
1283
1284         /**
1285          * Checks if the contact is archived
1286          *
1287          * @param int $cid contact id
1288          *
1289          * @return boolean Is the contact archived?
1290          * @throws HTTPException\InternalServerErrorException
1291          */
1292         public static function isArchived(int $cid)
1293         {
1294                 if ($cid == 0) {
1295                         return false;
1296                 }
1297
1298                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1299                 if (!DBA::isResult($contact)) {
1300                         return false;
1301                 }
1302
1303                 if ($contact['archive']) {
1304                         return true;
1305                 }
1306
1307                 // Check status of ActivityPub endpoints
1308                 $apcontact = APContact::getByURL($contact['url'], false);
1309                 if (!empty($apcontact)) {
1310                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1311                                 return true;
1312                         }
1313
1314                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1315                                 return true;
1316                         }
1317                 }
1318
1319                 // Check status of Diaspora endpoints
1320                 if (!empty($contact['batch'])) {
1321                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1322                         return DBA::exists('contact', $condition);
1323                 }
1324
1325                 return false;
1326         }
1327
1328         /**
1329          * Checks if the contact is blocked
1330          *
1331          * @param int $cid contact id
1332          *
1333          * @return boolean Is the contact blocked?
1334          * @throws HTTPException\InternalServerErrorException
1335          */
1336         public static function isBlocked($cid)
1337         {
1338                 if ($cid == 0) {
1339                         return false;
1340                 }
1341
1342                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1343                 if (!DBA::isResult($blocked)) {
1344                         return false;
1345                 }
1346
1347                 if (Network::isUrlBlocked($blocked['url'])) {
1348                         return true;
1349                 }
1350
1351                 return (bool) $blocked['blocked'];
1352         }
1353
1354         /**
1355          * Checks if the contact is hidden
1356          *
1357          * @param int $cid contact id
1358          *
1359          * @return boolean Is the contact hidden?
1360          * @throws \Exception
1361          */
1362         public static function isHidden($cid)
1363         {
1364                 if ($cid == 0) {
1365                         return false;
1366                 }
1367
1368                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1369                 if (!DBA::isResult($hidden)) {
1370                         return false;
1371                 }
1372                 return (bool) $hidden['hidden'];
1373         }
1374
1375         /**
1376          * Returns posts from a given contact url
1377          *
1378          * @param string $contact_url Contact URL
1379          * @param bool   $thread_mode
1380          * @param int    $update      Update mode
1381          * @param int    $parent      Item parent ID for the update mode
1382          * @param bool   $only_media  Only display media content
1383          * @return string posts in HTML
1384          * @throws \Exception
1385          */
1386         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1387         {
1388                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1389         }
1390
1391         /**
1392          * Returns posts from a given contact id
1393          *
1394          * @param int  $cid         Contact ID
1395          * @param bool $thread_mode
1396          * @param int  $update      Update mode
1397          * @param int  $parent      Item parent ID for the update mode
1398          * @param bool $only_media  Only display media content
1399          * @return string posts in HTML
1400          * @throws \Exception
1401          */
1402         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1403         {
1404                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1405                 if (!DBA::isResult($contact)) {
1406                         return '';
1407                 }
1408
1409                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1410                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1411                 } else {
1412                         $sql = "`uid` = ?";
1413                 }
1414
1415                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1416
1417                 if ($thread_mode) {
1418                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1419                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1420                 } else {
1421                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1422                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1423                 }
1424
1425                 if (!empty($parent)) {
1426                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1427                 } else {
1428                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1429                         if (!empty($last_received)) {
1430                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1431                         }
1432                 }
1433
1434                 if ($only_media) {
1435                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1436                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1437                 }
1438
1439                 if (DI::mode()->isMobile()) {
1440                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1441                                 DI::config()->get('system', 'itemspage_network_mobile'));
1442                 } else {
1443                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1444                                 DI::config()->get('system', 'itemspage_network'));
1445                 }
1446
1447                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1448
1449                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1450
1451                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1452                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1453                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1454                 } else {
1455                         $o = '';
1456                 }
1457
1458                 if ($thread_mode) {
1459                         $fields = ['uri-id', 'thr-parent-id', 'gravity', 'author-id', 'commented'];
1460                         $items = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
1461
1462                         if ($pager->getStart() == 0) {
1463                                 $cdata = Contact::getPublicAndUserContactID($cid, local_user());
1464                                 if (!empty($cdata['public'])) {
1465                                         $pinned = Post\Collection::selectToArrayForContact($cdata['public'], Post\Collection::FEATURED, $fields);
1466                                         $items = array_merge($items, $pinned);
1467                                 }
1468                         }
1469
1470                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'pinned_commented', local_user());
1471                 } else {
1472                         $fields = array_merge(Item::DISPLAY_FIELDLIST, ['featured']);
1473                         $items = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
1474
1475                         if ($pager->getStart() == 0) {
1476                                 $cdata = Contact::getPublicAndUserContactID($cid, local_user());
1477                                 if (!empty($cdata['public'])) {
1478                                         $condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
1479                                                 $cdata['public'], Post\Collection::FEATURED];
1480                                         $pinned = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
1481                                         $items = array_merge($pinned, $items);
1482                                 }
1483                         }
1484
1485                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1486                 }
1487
1488                 if (!$update) {
1489                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1490                                 $o .= HTML::scrollLoader();
1491                         } else {
1492                                 $o .= $pager->renderMinimal(count($items));
1493                         }
1494                 }
1495
1496                 return $o;
1497         }
1498
1499         /**
1500          * Returns the account type name
1501          *
1502          * The function can be called with either the user or the contact array
1503          *
1504          * @param int $type type of contact or account
1505          * @return string
1506          */
1507         public static function getAccountType(int $type)
1508         {
1509                 switch ($type) {
1510                         case self::TYPE_ORGANISATION:
1511                                 $account_type = DI::l10n()->t("Organisation");
1512                                 break;
1513
1514                         case self::TYPE_NEWS:
1515                                 $account_type = DI::l10n()->t('News');
1516                                 break;
1517
1518                         case self::TYPE_COMMUNITY:
1519                                 $account_type = DI::l10n()->t("Forum");
1520                                 break;
1521
1522                         default:
1523                                 $account_type = "";
1524                                 break;
1525                 }
1526
1527                 return $account_type;
1528         }
1529
1530         /**
1531          * Blocks a contact
1532          *
1533          * @param int $cid
1534          * @return bool
1535          * @throws \Exception
1536          */
1537         public static function block($cid, $reason = null)
1538         {
1539                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1540
1541                 return $return;
1542         }
1543
1544         /**
1545          * Unblocks a contact
1546          *
1547          * @param int $cid
1548          * @return bool
1549          * @throws \Exception
1550          */
1551         public static function unblock($cid)
1552         {
1553                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1554
1555                 return $return;
1556         }
1557
1558         /**
1559          * Ensure that cached avatar exist
1560          *
1561          * @param integer $cid
1562          */
1563         public static function checkAvatarCache(int $cid)
1564         {
1565                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1566                 if (!DBA::isResult($contact)) {
1567                         return;
1568                 }
1569
1570                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1571                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1572                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1573                                 self::updateAvatar($cid, $contact['avatar'], true);
1574                                 return;
1575                         }
1576                 } elseif (!empty($contact['photo']) || !empty($contact['thumb']) || !empty($contact['micro'])) {
1577                         Logger::info('Removing avatar cache', ['id' => $cid, 'contact' => $contact]);
1578                         self::updateAvatar($cid, $contact['avatar'], true);
1579                         return;
1580                 }
1581         }
1582
1583         /**
1584          * Return the photo path for a given contact array in the given size
1585          *
1586          * @param array $contact    contact array
1587          * @param string $field     Fieldname of the photo in the contact array
1588          * @param string $size      Size of the avatar picture
1589          * @param string $avatar    Avatar path that is displayed when no photo had been found
1590          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1591          * @return string photo path
1592          */
1593         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1594         {
1595                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1596                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1597         }
1598
1599         /**
1600          * Return the photo path for a given contact array
1601          *
1602          * @param array  $contact   Contact array
1603          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1604          * @return string photo path
1605          */
1606         public static function getPhoto(array $contact, bool $no_update = false)
1607         {
1608                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1609         }
1610
1611         /**
1612          * Return the photo path (thumb size) for a given contact array
1613          *
1614          * @param array  $contact   Contact array
1615          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1616          * @return string photo path
1617          */
1618         public static function getThumb(array $contact, bool $no_update = false)
1619         {
1620                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1621         }
1622
1623         /**
1624          * Return the photo path (micro size) for a given contact array
1625          *
1626          * @param array  $contact   Contact array
1627          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1628          * @return string photo path
1629          */
1630         public static function getMicro(array $contact, bool $no_update = false)
1631         {
1632                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1633         }
1634
1635         /**
1636          * Check the given contact array for avatar cache fields
1637          *
1638          * @param array $contact
1639          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1640          * @return array contact array with avatar cache fields
1641          */
1642         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1643         {
1644                 $update = false;
1645                 $contact_fields = [];
1646                 $fields = ['photo', 'thumb', 'micro'];
1647                 foreach ($fields as $field) {
1648                         if (isset($contact[$field])) {
1649                                 $contact_fields[] = $field;
1650                         }
1651                         if (isset($contact[$field]) && empty($contact[$field])) {
1652                                 $update = true;
1653                         }
1654                 }
1655
1656                 if (!$update || $no_update) {
1657                         return $contact;
1658                 }
1659
1660                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1661                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1662
1663                         $new_contact = self::getById($contact['id'], $contact_fields);
1664                         if (DBA::isResult($new_contact)) {
1665                                 // We only update the cache fields
1666                                 $contact = array_merge($contact, $new_contact);
1667                         }
1668                 }
1669
1670                 /// add the default avatars if the fields aren't filled
1671                 if (isset($contact['photo']) && empty($contact['photo'])) {
1672                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1673                 }
1674                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1675                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1676                 }
1677                 if (isset($contact['micro']) && empty($contact['micro'])) {
1678                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1679                 }
1680
1681                 return $contact;
1682         }
1683
1684         /**
1685          * Fetch the default header for the given contact
1686          *
1687          * @param array $contact  contact array
1688          * @return string avatar URL
1689          */
1690         public static function getDefaultHeader(array $contact): string
1691         {
1692                 if (!empty($contact['header'])) {
1693                         return $contact['header'];
1694                 }
1695
1696                 if (!empty($contact['gsid'])) {
1697                         // Use default banners for certain platforms
1698                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1699                         $platform = strtolower($gserver['platform'] ?? '');
1700                 } else {
1701                         $platform = '';
1702                 }
1703
1704                 switch ($platform) {
1705                         case 'friendica':
1706                         case 'friendika':
1707                                 /**
1708                                  * Picture credits
1709                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1710                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1711                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1712                                  */
1713                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1714                                 break;
1715                         case 'diaspora':
1716                                 /**
1717                                  * Picture credits
1718                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1719                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1720                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1721                                  */
1722                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1723                                 break;
1724                         default:
1725                                 /**
1726                                  * Use a random picture.
1727                                  * The service provides random pictures from Unsplash.
1728                                  * @license https://unsplash.com/license
1729                                  */
1730                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1731                                 break;
1732                 }
1733
1734                 return $header;
1735         }
1736
1737         /**
1738          * Fetch the default avatar for the given contact and size
1739          *
1740          * @param array $contact  contact array
1741          * @param string $size    Size of the avatar picture
1742          * @return string avatar URL
1743          */
1744         public static function getDefaultAvatar(array $contact, string $size)
1745         {
1746                 switch ($size) {
1747                         case Proxy::SIZE_MICRO:
1748                                 $avatar['size'] = 48;
1749                                 $default = self::DEFAULT_AVATAR_MICRO;
1750                                 break;
1751
1752                         case Proxy::SIZE_THUMB:
1753                                 $avatar['size'] = 80;
1754                                 $default = self::DEFAULT_AVATAR_THUMB;
1755                                 break;
1756
1757                         case Proxy::SIZE_SMALL:
1758                         default:
1759                                 $avatar['size'] = 300;
1760                                 $default = self::DEFAULT_AVATAR_PHOTO;
1761                                 break;
1762                 }
1763
1764                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1765                         return DI::baseUrl() . $default;
1766                 }
1767
1768                 if (!empty($contact['xmpp'])) {
1769                         $avatar['email'] = $contact['xmpp'];
1770                 } elseif (!empty($contact['addr'])) {
1771                         $avatar['email'] = $contact['addr'];
1772                 } elseif (!empty($contact['url'])) {
1773                         $avatar['email'] = $contact['url'];
1774                 } else {
1775                         return DI::baseUrl() . $default;
1776                 }
1777
1778                 $avatar['url'] = '';
1779                 $avatar['success'] = false;
1780
1781                 Hook::callAll('avatar_lookup', $avatar);
1782
1783                 if ($avatar['success'] && !empty($avatar['url'])) {
1784                         return $avatar['url'];
1785                 }
1786
1787                 return DI::baseUrl() . $default;
1788         }
1789
1790         /**
1791          * Get avatar link for given contact id
1792          *
1793          * @param integer $cid     contact id
1794          * @param string  $size    One of the Proxy::SIZE_* constants
1795          * @param string  $updated Contact update date
1796          * @return string avatar link
1797          */
1798         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1799         {
1800                 // We have to fetch the "updated" variable when it wasn't provided
1801                 // The parameter can be provided to improve performance
1802                 if (empty($updated)) {
1803                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1804                         $updated = $account['updated'] ?? '';
1805                         $guid = $account['guid'] ?? '';
1806                 }
1807
1808                 $guid = urlencode($guid);
1809
1810                 $url = DI::baseUrl() . '/photo/contact/';
1811                 switch ($size) {
1812                         case Proxy::SIZE_MICRO:
1813                                 $url .= Proxy::PIXEL_MICRO . '/';
1814                                 break;
1815                         case Proxy::SIZE_THUMB:
1816                                 $url .= Proxy::PIXEL_THUMB . '/';
1817                                 break;
1818                         case Proxy::SIZE_SMALL:
1819                                 $url .= Proxy::PIXEL_SMALL . '/';
1820                                 break;
1821                         case Proxy::SIZE_MEDIUM:
1822                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1823                                 break;
1824                         case Proxy::SIZE_LARGE:
1825                                 $url .= Proxy::PIXEL_LARGE . '/';
1826                                 break;
1827                 }
1828                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1829         }
1830
1831         /**
1832          * Get avatar link for given contact URL
1833          *
1834          * @param string  $url  contact url
1835          * @param integer $uid  user id
1836          * @param string  $size One of the Proxy::SIZE_* constants
1837          * @return string avatar link
1838          */
1839         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1840         {
1841                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1842                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1843                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1844                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1845         }
1846
1847         /**
1848          * Get header link for given contact id
1849          *
1850          * @param integer $cid     contact id
1851          * @param string  $size    One of the Proxy::SIZE_* constants
1852          * @param string  $updated Contact update date
1853          * @return string header link
1854          */
1855         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1856         {
1857                 // We have to fetch the "updated" variable when it wasn't provided
1858                 // The parameter can be provided to improve performance
1859                 if (empty($updated) || empty($guid)) {
1860                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1861                         $updated = $account['updated'] ?? '';
1862                         $guid = $account['guid'] ?? '';
1863                 }
1864
1865                 $guid = urlencode($guid);
1866
1867                 $url = DI::baseUrl() . '/photo/header/';
1868                 switch ($size) {
1869                         case Proxy::SIZE_MICRO:
1870                                 $url .= Proxy::PIXEL_MICRO . '/';
1871                                 break;
1872                         case Proxy::SIZE_THUMB:
1873                                 $url .= Proxy::PIXEL_THUMB . '/';
1874                                 break;
1875                         case Proxy::SIZE_SMALL:
1876                                 $url .= Proxy::PIXEL_SMALL . '/';
1877                                 break;
1878                         case Proxy::SIZE_MEDIUM:
1879                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1880                                 break;
1881                         case Proxy::SIZE_LARGE:
1882                                 $url .= Proxy::PIXEL_LARGE . '/';
1883                                 break;
1884                 }
1885
1886                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1887         }
1888
1889         /**
1890          * Updates the avatar links in a contact only if needed
1891          *
1892          * @param int    $cid          Contact id
1893          * @param string $avatar       Link to avatar picture
1894          * @param bool   $force        force picture update
1895          * @param bool   $create_cache Enforces the creation of cached avatar fields
1896          *
1897          * @return void
1898          * @throws HTTPException\InternalServerErrorException
1899          * @throws HTTPException\NotFoundException
1900          * @throws \ImagickException
1901          */
1902         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1903         {
1904                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1905                         ['id' => $cid, 'self' => false]);
1906                 if (!DBA::isResult($contact)) {
1907                         return;
1908                 }
1909
1910                 $uid = $contact['uid'];
1911
1912                 // Only update the cached photo links of public contacts when they already are cached
1913                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1914                         if ($contact['avatar'] != $avatar) {
1915                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1916                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1917                         }
1918                         return;
1919                 }
1920
1921                 // User contacts use are updated through the public contacts
1922                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1923                         $pcid = self::getIdForURL($contact['url'], 0, false);
1924                         if (!empty($pcid)) {
1925                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1926                                 self::updateAvatar($pcid, $avatar, $force, true);
1927                                 return;
1928                         }
1929                 }
1930
1931                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1932
1933                 if ($default_avatar) {
1934                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1935                 }
1936
1937                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
1938
1939                 // Local contact avatars don't need to be cached
1940                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
1941                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
1942                 }
1943
1944                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
1945                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
1946                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1947                                         'photo' => $avatar,
1948                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1949                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1950                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1951                         }
1952
1953                         // Use the data from the self account
1954                         if (empty($fields)) {
1955                                 $local_uid = User::getIdForURL($contact['url']);
1956                                 if (!empty($local_uid)) {
1957                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1958                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1959                                 }
1960                         }
1961
1962                         if (empty($fields)) {
1963                                 $update = ($contact['avatar'] != $avatar) || $force;
1964
1965                                 if (!$update) {
1966                                         $data = [
1967                                                 $contact['photo'] ?? '',
1968                                                 $contact['thumb'] ?? '',
1969                                                 $contact['micro'] ?? '',
1970                                         ];
1971
1972                                         foreach ($data as $image_uri) {
1973                                                 $image_rid = Photo::ridFromURI($image_uri);
1974                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1975                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1976                                                         $update = true;
1977                                                 }
1978                                         }
1979                                 }
1980
1981                                 if ($update) {
1982                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1983                                         if ($photos) {
1984                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1985                                                 $update = !empty($fields);
1986                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1987                                         } else {
1988                                                 $update = false;
1989                                         }
1990                                 }
1991                         } else {
1992                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1993                         }
1994                 } else {
1995                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
1996                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1997                                 'photo' => '', 'thumb' => '', 'micro' => ''];
1998                         $update = ($avatar != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1999                 }
2000
2001                 if (!$update) {
2002                         return;
2003                 }
2004
2005                 $cids = [];
2006                 $uids = [];
2007                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2008                         // Collect all user contacts of the given public contact
2009                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
2010                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
2011                         while ($personal_contact = DBA::fetch($personal_contacts)) {
2012                                 $cids[] = $personal_contact['id'];
2013                                 $uids[] = $personal_contact['uid'];
2014                         }
2015                         DBA::close($personal_contacts);
2016
2017                         if (!empty($cids)) {
2018                                 // Delete possibly existing cached user contact avatars
2019                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
2020                         }
2021                 }
2022
2023                 $cids[] = $cid;
2024                 $uids[] = $uid;
2025                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2026                 self::update($fields, ['id' => $cids]);
2027         }
2028
2029         public static function deleteContactByUrl(string $url)
2030         {
2031                 // Update contact data for all users
2032                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2033                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2034                 while ($contact = DBA::fetch($contacts)) {
2035                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2036                         self::remove($contact['id']);
2037                 }
2038         }
2039
2040         /**
2041          * Helper function for "updateFromProbe". Updates personal and public contact
2042          *
2043          * @param integer $id      contact id
2044          * @param integer $uid     user id
2045          * @param string  $old_url The previous profile URL of the contact
2046          * @param string  $new_url The profile URL of the contact
2047          * @param array   $fields  The fields that are updated
2048          *
2049          * @throws \Exception
2050          */
2051         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
2052         {
2053                 if (!self::update($fields, ['id' => $id])) {
2054                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2055                         return;
2056                 }
2057
2058                 // Search for duplicated contacts and get rid of them
2059                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
2060                         return;
2061                 }
2062
2063                 // Archive or unarchive the contact.
2064                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2065                 if (!DBA::isResult($contact)) {
2066                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2067                         return;
2068                 }
2069
2070                 if (isset($fields['failed'])) {
2071                         if ($fields['failed']) {
2072                                 self::markForArchival($contact);
2073                         } else {
2074                                 self::unmarkForArchival($contact);
2075                         }
2076                 }
2077
2078                 if ($contact['uid'] != 0) {
2079                         return;
2080                 }
2081
2082                 // Update contact data for all users
2083                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
2084
2085                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2086                 self::update($fields, $condition);
2087
2088                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2089                 $condition['network'] = Protocol::OSTATUS;
2090
2091                 // If the contact failed, propagate the update fields to all contacts
2092                 if (empty($fields['failed'])) {
2093                         unset($fields['last-update']);
2094                         unset($fields['success_update']);
2095                         unset($fields['failure_update']);
2096                 }
2097
2098                 if (empty($fields)) {
2099                         return;
2100                 }
2101
2102                 self::update($fields, $condition);
2103         }
2104
2105         /**
2106          * Remove duplicated contacts
2107          *
2108          * @param string  $nurl  Normalised contact url
2109          * @param integer $uid   User id
2110          * @return boolean
2111          * @throws \Exception
2112          */
2113         public static function removeDuplicates(string $nurl, int $uid)
2114         {
2115                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2116                 $count = DBA::count('contact', $condition);
2117                 if ($count <= 1) {
2118                         return false;
2119                 }
2120
2121                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2122                 if (!DBA::isResult($first_contact)) {
2123                         // Shouldn't happen - so we handle it
2124                         return false;
2125                 }
2126
2127                 $first = $first_contact['id'];
2128                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2129                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2130                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2131                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2132                         return false;
2133                 }
2134
2135                 // Find all duplicates
2136                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2137                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2138                 while ($duplicate = DBA::fetch($duplicates)) {
2139                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2140                                 continue;
2141                         }
2142
2143                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2144                 }
2145                 DBA::close($duplicates);
2146                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2147                 return true;
2148         }
2149
2150         /**
2151          * @param integer $id      contact id
2152          * @param string  $network Optional network we are probing for
2153          * @return boolean
2154          * @throws HTTPException\InternalServerErrorException
2155          * @throws \ImagickException
2156          */
2157         public static function updateFromProbe(int $id, string $network = '')
2158         {
2159                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2160                 if (!DBA::isResult($contact)) {
2161                         return false;
2162                 }
2163
2164                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2165
2166                 if ($ret['network'] == Protocol::DIASPORA) {
2167                         FContact::updateFromProbeArray($ret);
2168                 }
2169
2170                 return self::updateFromProbeArray($id, $ret);
2171         }
2172
2173         /**
2174          * @param integer $id      contact id
2175          * @param array   $ret     Probed data
2176          * @return boolean
2177          * @throws HTTPException\InternalServerErrorException
2178          * @throws \ImagickException
2179          */
2180         private static function updateFromProbeArray(int $id, array $ret)
2181         {
2182                 /*
2183                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2184                   This will reliably kill your communication with old Friendica contacts.
2185                  */
2186
2187                 // These fields aren't updated by this routine:
2188                 // 'sensitive'
2189
2190                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2191                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2192                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2193                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2194                 if (!DBA::isResult($contact)) {
2195                         return false;
2196                 }
2197
2198                 if (self::isLocal($ret['url'])) {
2199                         if ($contact['uid'] == 0) {
2200                                 Logger::info('Local contacts are not updated here.');
2201                         } else {
2202                                 self::updateFromPublicContact($id, $contact);
2203                         }
2204                         return true;
2205                 }
2206
2207                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2208                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2209                         self::remove($id);
2210
2211                         // Delete all contacts with the same URL
2212                         self::deleteContactByUrl($ret['url']);
2213                         return true;
2214                 }
2215
2216                 $uid = $contact['uid'];
2217                 unset($contact['uid']);
2218
2219                 $uriid = $contact['uri-id'];
2220                 unset($contact['uri-id']);
2221
2222                 $pubkey = $contact['pubkey'];
2223                 unset($contact['pubkey']);
2224
2225                 $contact['photo'] = $contact['avatar'];
2226                 unset($contact['avatar']);
2227
2228                 $updated = DateTimeFormat::utcNow();
2229
2230                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2231                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2232                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2233                         return false;
2234                 }
2235
2236                 // We must not try to update relay contacts via probe. They are no real contacts.
2237                 // We check after the probing to be able to correct falsely detected contact types.
2238                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2239                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2240                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2241                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2242                         return true;
2243                 }
2244
2245                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2246                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2247                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2248                         return false;
2249                 }
2250
2251                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2252                         $cid = self::getIdForURL($ret['url'], 0, false);
2253                         if (!empty($cid) && ($cid != $id)) {
2254                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2255                                 return self::updateFromProbeArray($cid, $ret);
2256                         }
2257                 }
2258
2259                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2260                         $ret['unsearchable'] = $ret['hide'];
2261                 }
2262
2263                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2264                         $ret['forum'] = false;
2265                         $ret['prv'] = false;
2266                         $ret['contact-type'] = $ret['account-type'];
2267                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2268                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2269                                 $ret['prv'] = (bool)!$ret['forum'];
2270                         }
2271                 }
2272
2273                 $new_pubkey = $ret['pubkey'] ?? '';
2274
2275                 if ($uid == 0) {
2276                         if ($ret['network'] == Protocol::ACTIVITYPUB) {
2277                                 ActivityPub\Processor::fetchFeaturedPosts($ret['url']);
2278                         }
2279
2280                         $ret['last-item'] = Probe::getLastUpdate($ret);
2281                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2282                 }
2283
2284                 $update = false;
2285                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2286
2287                 // make sure to not overwrite existing values with blank entries except some technical fields
2288                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2289                 foreach ($ret as $key => $val) {
2290                         if (!array_key_exists($key, $contact)) {
2291                                 unset($ret[$key]);
2292                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2293                                 $ret[$key] = $contact[$key];
2294                         } elseif ($ret[$key] != $contact[$key]) {
2295                                 $update = true;
2296                         }
2297                 }
2298
2299                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2300                         $update = true;
2301                 } else {
2302                         unset($ret['last-item']);
2303                 }
2304
2305                 if (empty($uriid)) {
2306                         $update = true;
2307                 }
2308
2309                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2310                         self::updateAvatar($id, $ret['photo'], $update);
2311                 }
2312
2313                 $uriid = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2314
2315                 if (!$update) {
2316                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2317
2318                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2319                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2320                         }
2321
2322                         // Update the public contact
2323                         if ($uid != 0) {
2324                                 $contact = self::getByURL($ret['url'], false, ['id']);
2325                                 if (!empty($contact['id'])) {
2326                                         self::updateFromProbeArray($contact['id'], $ret);
2327                                 }
2328                         }
2329
2330                         return true;
2331                 }
2332
2333                 $ret['uri-id']  = $uriid;
2334                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2335                 $ret['updated'] = $updated;
2336                 $ret['failed']  = false;
2337
2338                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2339                 if (empty($pubkey) && !empty($new_pubkey)) {
2340                         $ret['pubkey'] = $new_pubkey;
2341                 }
2342
2343                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2344                         $ret['uri-date'] = $updated;
2345                 }
2346
2347                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2348                         $ret['name-date'] = $updated;
2349                 }
2350
2351                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2352                         $ret['last-update'] = $updated;
2353                         $ret['success_update'] = $updated;
2354                 }
2355
2356                 unset($ret['photo']);
2357
2358                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2359
2360                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2361                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2362                 }
2363
2364                 return true;
2365         }
2366
2367         private static function updateFromPublicContact(int $id, array $contact)
2368         {
2369                 $public = self::getByURL($contact['url'], false);
2370
2371                 $fields = [];
2372
2373                 foreach ($contact as $field => $value) {
2374                         if ($field == 'uid') {
2375                                 continue;
2376                         }
2377                         if ($public[$field] != $value) {
2378                                 $fields[$field] = $public[$field];
2379                         }
2380                 }
2381                 if (!empty($fields)) {
2382                         self::update($fields, ['id' => $id, 'self' => false]);
2383                         Logger::info('Updating local contact', ['id' => $id]);
2384                 }
2385         }
2386
2387         /**
2388          * @param integer $url contact url
2389          * @return integer Contact id
2390          * @throws HTTPException\InternalServerErrorException
2391          * @throws \ImagickException
2392          */
2393         public static function updateFromProbeByURL($url)
2394         {
2395                 $id = self::getIdForURL($url);
2396
2397                 if (empty($id)) {
2398                         return $id;
2399                 }
2400
2401                 self::updateFromProbe($id);
2402
2403                 return $id;
2404         }
2405
2406         /**
2407          * Detects the communication protocol for a given contact url.
2408          * This is used to detect Friendica contacts that we can communicate via AP.
2409          *
2410          * @param string $url contact url
2411          * @param string $network Network of that contact
2412          * @return string with protocol
2413          */
2414         public static function getProtocol($url, $network)
2415         {
2416                 if ($network != Protocol::DFRN) {
2417                         return $network;
2418                 }
2419
2420                 $apcontact = APContact::getByURL($url);
2421                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2422                         return Protocol::ACTIVITYPUB;
2423                 } else {
2424                         return $network;
2425                 }
2426         }
2427
2428         /**
2429          * Takes a $uid and a url/handle and adds a new contact
2430          *
2431          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2432          * dfrn_request page.
2433          *
2434          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2435          *
2436          * Returns an array
2437          * $return['success'] boolean true if successful
2438          * $return['message'] error text if success is false.
2439          *
2440          * Takes a $uid and a url/handle and adds a new contact
2441          *
2442          * @param int    $uid         The user id the contact should be created for
2443          * @param string $url         The profile URL of the contact
2444          * @param string $network
2445          * @return array
2446          * @throws HTTPException\InternalServerErrorException
2447          * @throws HTTPException\NotFoundException
2448          * @throws \ImagickException
2449          */
2450         public static function createFromProbeForUser(int $uid, $url, $network = '')
2451         {
2452                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2453
2454                 // remove ajax junk, e.g. Twitter
2455                 $url = str_replace('/#!/', '/', $url);
2456
2457                 if (!Network::isUrlAllowed($url)) {
2458                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2459                         return $result;
2460                 }
2461
2462                 if (Network::isUrlBlocked($url)) {
2463                         $result['message'] = DI::l10n()->t('Blocked domain');
2464                         return $result;
2465                 }
2466
2467                 if (!$url) {
2468                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2469                         return $result;
2470                 }
2471
2472                 $arr = ['url' => $url, 'contact' => []];
2473
2474                 Hook::callAll('follow', $arr);
2475
2476                 if (empty($arr)) {
2477                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2478                         return $result;
2479                 }
2480
2481                 if (!empty($arr['contact']['name'])) {
2482                         $probed = false;
2483                         $ret = $arr['contact'];
2484                 } else {
2485                         $probed = true;
2486                         $ret = Probe::uri($url, $network, $uid);
2487                 }
2488
2489                 if (($network != '') && ($ret['network'] != $network)) {
2490                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2491                         return $result;
2492                 }
2493
2494                 // check if we already have a contact
2495                 // the poll url is more reliable than the profile url, as we may have
2496                 // indirect links or webfinger links
2497
2498                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2499                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2500                 if (!DBA::isResult($contact)) {
2501                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2502                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2503                 }
2504
2505                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2506
2507                 // This extra param just confuses things, remove it
2508                 if ($protocol === Protocol::DIASPORA) {
2509                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2510                 }
2511
2512                 // do we have enough information?
2513                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2514                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2515                         if (empty($ret['poll'])) {
2516                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2517                         }
2518                         if (empty($ret['name'])) {
2519                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2520                         }
2521                         if (empty($ret['url'])) {
2522                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2523                         }
2524                         if (strpos($ret['url'], '@') !== false) {
2525                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2526                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2527                         }
2528                         return $result;
2529                 }
2530
2531                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2532                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2533                         $ret['notify'] = '';
2534                 }
2535
2536                 if (!$ret['notify']) {
2537                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2538                 }
2539
2540                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2541
2542                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2543
2544                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2545
2546                 $pending = false;
2547                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2548                         $pending = (bool)$ret['manually-approve'];
2549                 }
2550
2551                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2552                         $writeable = 1;
2553                 }
2554
2555                 if (DBA::isResult($contact)) {
2556                         // update contact
2557                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2558
2559                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2560                         self::update($fields, ['id' => $contact['id']]);
2561                 } else {
2562                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2563
2564                         // create contact record
2565                         self::insert([
2566                                 'uid'     => $uid,
2567                                 'created' => DateTimeFormat::utcNow(),
2568                                 'url'     => $ret['url'],
2569                                 'nurl'    => Strings::normaliseLink($ret['url']),
2570                                 'addr'    => $ret['addr'],
2571                                 'alias'   => $ret['alias'],
2572                                 'batch'   => $ret['batch'],
2573                                 'notify'  => $ret['notify'],
2574                                 'poll'    => $ret['poll'],
2575                                 'poco'    => $ret['poco'],
2576                                 'name'    => $ret['name'],
2577                                 'nick'    => $ret['nick'],
2578                                 'network' => $ret['network'],
2579                                 'baseurl' => $ret['baseurl'],
2580                                 'gsid'    => $ret['gsid'] ?? null,
2581                                 'protocol' => $protocol,
2582                                 'pubkey'  => $ret['pubkey'],
2583                                 'rel'     => $new_relation,
2584                                 'priority'=> $ret['priority'],
2585                                 'writable'=> $writeable,
2586                                 'hidden'  => $hidden,
2587                                 'blocked' => 0,
2588                                 'readonly'=> 0,
2589                                 'pending' => $pending,
2590                                 'subhub'  => $subhub
2591                         ]);
2592                 }
2593
2594                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2595                 if (!DBA::isResult($contact)) {
2596                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2597                         return $result;
2598                 }
2599
2600                 $contact_id = $contact['id'];
2601                 $result['cid'] = $contact_id;
2602
2603                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
2604
2605                 // Update the avatar
2606                 self::updateAvatar($contact_id, $ret['photo']);
2607
2608                 // pull feed and consume it, which should subscribe to the hub.
2609                 if ($contact['network'] == Protocol::OSTATUS) {
2610                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2611                 }
2612
2613                 if ($probed) {
2614                         self::updateFromProbeArray($contact_id, $ret);
2615                 } else {
2616                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2617                 }
2618
2619                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
2620
2621                 return $result;
2622         }
2623
2624         /**
2625          * @param array  $importer Owner (local user) data
2626          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2627          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2628          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2629          * @param string $note     Introduction additional message
2630          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2631          * @throws HTTPException\InternalServerErrorException
2632          * @throws \ImagickException
2633          */
2634         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2635         {
2636                 // Should always be set
2637                 if (empty($datarray['author-id'])) {
2638                         return false;
2639                 }
2640
2641                 $fields = ['id', 'url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2642                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2643                 if (!DBA::isResult($pub_contact)) {
2644                         // Should never happen
2645                         return false;
2646                 }
2647
2648                 // Contact is blocked at node-level
2649                 if (self::isBlocked($datarray['author-id'])) {
2650                         return false;
2651                 }
2652
2653                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2654                 $name = $pub_contact['name'];
2655                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2656                 $nick = $pub_contact['nick'];
2657                 $network = $pub_contact['network'];
2658
2659                 // Ensure that we don't create a new contact when there already is one
2660                 $cid = self::getIdForURL($url, $importer['uid']);
2661                 if (!empty($cid)) {
2662                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2663                 }
2664
2665                 if (!empty($contact)) {
2666                         if (!empty($contact['pending'])) {
2667                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2668                                 return null;
2669                         }
2670
2671                         // Contact is blocked at user-level
2672                         if (!empty($contact['id']) && !empty($importer['id']) &&
2673                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2674                                 return false;
2675                         }
2676
2677                         // Make sure that the existing contact isn't archived
2678                         self::unmarkForArchival($contact);
2679
2680                         if (($contact['rel'] == self::SHARING)
2681                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2682                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2683                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2684                         }
2685
2686                         // Ensure to always have the correct network type, independent from the connection request method
2687                         self::updateFromProbe($contact['id']);
2688
2689                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
2690
2691                         return true;
2692                 } else {
2693                         // send email notification to owner?
2694                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2695                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
2696                                 return null;
2697                         }
2698
2699                         // create contact record
2700                         $contact_id = self::insert([
2701                                 'uid'      => $importer['uid'],
2702                                 'created'  => DateTimeFormat::utcNow(),
2703                                 'url'      => $url,
2704                                 'nurl'     => Strings::normaliseLink($url),
2705                                 'name'     => $name,
2706                                 'nick'     => $nick,
2707                                 'network'  => $network,
2708                                 'rel'      => self::FOLLOWER,
2709                                 'blocked'  => 0,
2710                                 'readonly' => 0,
2711                                 'pending'  => 1,
2712                                 'writable' => 1,
2713                         ]);
2714
2715                         // Ensure to always have the correct network type, independent from the connection request method
2716                         self::updateFromProbe($contact_id);
2717
2718                         self::updateAvatar($contact_id, $photo, true);
2719
2720                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
2721
2722                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2723
2724                         /// @TODO Encapsulate this into a function/method
2725                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2726                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2727                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2728                                 // create notification
2729                                 if (is_array($contact_record)) {
2730                                         $intro = DI::introFactory()->createNew(
2731                                                 $importer['uid'],
2732                                                 $contact_record['id'],
2733                                                 $note
2734                                         );
2735                                         DI::intro()->save($intro);
2736                                 }
2737
2738                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
2739
2740                                 if (($user['notify-flags'] & Notification\Type::INTRO) && $user['page-flags'] == User::PAGE_FLAGS_NORMAL) {
2741                                         DI::notify()->createFromArray([
2742                                                 'type'  => Notification\Type::INTRO,
2743                                                 'otype' => Notification\ObjectType::INTRO,
2744                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2745                                                 'uid'   => $user['uid'],
2746                                                 'cid'   => $contact_record['id'],
2747                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2748                                         ]);
2749                                 }
2750                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2751                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2752                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2753                                 }
2754
2755                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2756                                 $fields = ['pending' => false];
2757                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2758                                         $fields['rel'] = self::FRIEND;
2759                                 }
2760
2761                                 self::update($fields, $condition);
2762
2763                                 return true;
2764                         }
2765                 }
2766
2767                 return null;
2768         }
2769
2770         /**
2771          * Update the local relationship when a local user loses a follower
2772          *
2773          * @param array $contact User-specific contact (uid != 0) array
2774          * @throws HTTPException\InternalServerErrorException
2775          * @throws \ImagickException
2776          */
2777         public static function removeFollower(array $contact)
2778         {
2779                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2780                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
2781                 } elseif (!empty($contact['id'])) {
2782                         self::remove($contact['id']);
2783                 } else {
2784                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2785                         return;
2786                 }
2787
2788                 $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
2789
2790                 DI::notification()->deleteForUserByVerb($contact['uid'], Activity::FOLLOW, ['actor-id' => $cdata['public']]);
2791         }
2792
2793         /**
2794          * Update the local relationship when a local user unfollow a contact.
2795          * Removes the contact for sharing-only protocols (feed and mail).
2796          *
2797          * @param array $contact User-specific contact (uid != 0) array
2798          * @throws HTTPException\InternalServerErrorException
2799          */
2800         public static function removeSharer(array $contact)
2801         {
2802                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2803                         self::remove($contact['id']);
2804                 } else {
2805                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2806                 }
2807         }
2808
2809         /**
2810          * Create a birthday event.
2811          *
2812          * Update the year and the birthday.
2813          */
2814         public static function updateBirthdays()
2815         {
2816                 $condition = [
2817                         '`bd` > ?
2818                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2819                         AND NOT `contact`.`pending`
2820                         AND NOT `contact`.`hidden`
2821                         AND NOT `contact`.`blocked`
2822                         AND NOT `contact`.`archive`
2823                         AND NOT `contact`.`deleted`',
2824                         DBA::NULL_DATE,
2825                         self::SHARING,
2826                         self::FRIEND
2827                 ];
2828
2829                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2830
2831                 while ($contact = DBA::fetch($contacts)) {
2832                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
2833
2834                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2835
2836                         if (Event::createBirthday($contact, $nextbd)) {
2837                                 // update bdyear
2838                                 DBA::update(
2839                                         'contact',
2840                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2841                                         ['id' => $contact['id']]
2842                                 );
2843                         }
2844                 }
2845                 DBA::close($contacts);
2846         }
2847
2848         /**
2849          * Remove the unavailable contact ids from the provided list
2850          *
2851          * @param array $contact_ids Contact id list
2852          * @return array
2853          * @throws \Exception
2854          */
2855         public static function pruneUnavailable(array $contact_ids)
2856         {
2857                 if (empty($contact_ids)) {
2858                         return [];
2859                 }
2860
2861                 $contacts = self::selectToArray(['id'], [
2862                         'id'      => $contact_ids,
2863                         'blocked' => false,
2864                         'pending' => false,
2865                         'archive' => false,
2866                 ]);
2867
2868                 return array_column($contacts, 'id');
2869         }
2870
2871         /**
2872          * Returns a magic link to authenticate remote visitors
2873          *
2874          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2875          *
2876          * @param string $contact_url The address of the target contact profile
2877          * @param string $url         An url that we will be redirected to after the authentication
2878          *
2879          * @return string with "redir" link
2880          * @throws HTTPException\InternalServerErrorException
2881          * @throws \ImagickException
2882          */
2883         public static function magicLink($contact_url, $url = '')
2884         {
2885                 if (!Session::isAuthenticated()) {
2886                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2887                 }
2888
2889                 $contact = self::getByURL($contact_url, false);
2890                 if (empty($contact)) {
2891                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2892                 }
2893
2894                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2895                 unset($contact['uid']);
2896
2897                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2898         }
2899
2900         /**
2901          * Returns a magic link to authenticate remote visitors
2902          *
2903          * @param integer $cid The contact id of the target contact profile
2904          * @param string  $url An url that we will be redirected to after the authentication
2905          *
2906          * @return string with "redir" link
2907          * @throws HTTPException\InternalServerErrorException
2908          * @throws \ImagickException
2909          */
2910         public static function magicLinkById($cid, $url = '')
2911         {
2912                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2913
2914                 return self::magicLinkByContact($contact, $url);
2915         }
2916
2917         /**
2918          * Returns a magic link to authenticate remote visitors
2919          *
2920          * @param array  $contact The contact array with "uid", "network" and "url"
2921          * @param string $url     An url that we will be redirected to after the authentication
2922          *
2923          * @return string with "redir" link
2924          * @throws HTTPException\InternalServerErrorException
2925          * @throws \ImagickException
2926          */
2927         public static function magicLinkByContact($contact, $url = '')
2928         {
2929                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2930
2931                 if (!Session::isAuthenticated()) {
2932                         return $destination;
2933                 }
2934
2935                 // Only redirections to the same host do make sense
2936                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2937                         return $url;
2938                 }
2939
2940                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2941                         return 'contact/' . $contact['id'] . '/conversations';
2942                 }
2943
2944                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2945                         return $destination;
2946                 }
2947
2948                 if (empty($contact['id'])) {
2949                         return $destination;
2950                 }
2951
2952                 $redirect = 'redir/' . $contact['id'];
2953
2954                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2955                         $redirect .= '?url=' . $url;
2956                 }
2957
2958                 return $redirect;
2959         }
2960
2961         /**
2962          * Is the contact a forum?
2963          *
2964          * @param integer $contactid ID of the contact
2965          *
2966          * @return boolean "true" if it is a forum
2967          */
2968         public static function isForum($contactid)
2969         {
2970                 $fields = ['contact-type'];
2971                 $condition = ['id' => $contactid];
2972                 $contact = DBA::selectFirst('contact', $fields, $condition);
2973                 if (!DBA::isResult($contact)) {
2974                         return false;
2975                 }
2976
2977                 // Is it a forum?
2978                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
2979         }
2980
2981         /**
2982          * Can the remote contact receive private messages?
2983          *
2984          * @param array $contact
2985          * @return bool
2986          */
2987         public static function canReceivePrivateMessages(array $contact)
2988         {
2989                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2990                 $self = $contact['self'] ?? false;
2991
2992                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2993         }
2994
2995         /**
2996          * Search contact table by nick or name
2997          *
2998          * @param string $search Name or nick
2999          * @param string $mode   Search mode (e.g. "community")
3000          * @param int    $uid    User ID
3001          *
3002          * @return array with search results
3003          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3004          */
3005         public static function searchByName(string $search, string $mode = '', int $uid = 0)
3006         {
3007                 if (empty($search)) {
3008                         return [];
3009                 }
3010
3011                 // check supported networks
3012                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
3013                 if (DI::config()->get('system', 'diaspora_enabled')) {
3014                         $networks[] = Protocol::DIASPORA;
3015                 }
3016
3017                 if (!DI::config()->get('system', 'ostatus_disabled')) {
3018                         $networks[] = Protocol::OSTATUS;
3019                 }
3020
3021                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
3022
3023                 if ($uid == 0) {
3024                         $condition['blocked'] = false;
3025                 }
3026
3027                 // check if we search only communities or every contact
3028                 if ($mode === 'community') {
3029                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3030                 }
3031
3032                 $search .= '%';
3033
3034                 $condition = DBA::mergeConditions($condition,
3035                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3036                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3037
3038                 $contacts = self::selectToArray([], $condition);
3039                 return $contacts;
3040         }
3041
3042         /**
3043          * Add public contacts from an array
3044          *
3045          * @param array $urls
3046          * @return array result "count", "added" and "updated"
3047          */
3048         public static function addByUrls(array $urls)
3049         {
3050                 $added = 0;
3051                 $updated = 0;
3052                 $unchanged = 0;
3053                 $count = 0;
3054
3055                 foreach ($urls as $url) {
3056                         if (empty($url) || !is_string($url)) {
3057                                 continue;
3058                         }
3059                         $contact = self::getByURL($url, false, ['id', 'updated']);
3060                         if (empty($contact['id'])) {
3061                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3062                                 ++$added;
3063                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3064                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3065                                 ++$updated;
3066                         } else {
3067                                 ++$unchanged;
3068                         }
3069                         ++$count;
3070                 }
3071
3072                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3073         }
3074
3075         /**
3076          * Returns a random, global contact array of the current node
3077          *
3078          * @return array The profile array
3079          * @throws Exception
3080          */
3081         public static function getRandomContact()
3082         {
3083                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3084                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3085                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3086                 ], ['order' => ['RAND()']]);
3087
3088                 if (DBA::isResult($contact)) {
3089                         return $contact;
3090                 }
3091
3092                 return [];
3093         }
3094 }