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\Contact\Avatar;
  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', ['uri-id', 'photo', 'thumb', 'micro', 'uid'], ['id' => $id, 'self' => false]);
 801                 if (!DBA::isResult($contact)) {
 802                         return;
 803                 }
 804
 805                 self::clearFollowerFollowingEndpointCache($contact['uid']);
 806
 807                 // Archive the contact
 808                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 809
 810                 if (!DBA::exists('contact', ['uri-id' => $contact['uri-id'], 'deleted' => false])) {
 811                         Avatar::deleteCache($contact);
 812                 }
 813
 814                 // Delete it in the background
 815                 Worker::add(PRIORITY_MEDIUM, 'Contact\Remove', $id);
 816         }
 817
 818         /**
 819          * Unfollow the remote contact
 820          *
 821          * @param array $contact Target user-specific contact (uid != 0) array
 822          * @throws HTTPException\InternalServerErrorException
 823          * @throws \ImagickException
 824          */
 825         public static function unfollow(array $contact): void
 826         {
 827                 if (empty($contact['network'])) {
 828                         throw new \InvalidArgumentException('Empty network in contact array');
 829                 }
 830
 831                 if (empty($contact['uid'])) {
 832                         throw new \InvalidArgumentException('Unexpected public contact record');
 833                 }
 834
 835                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 836                         $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
 837                         if (!empty($cdata['public'])) {
 838                                 Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 839                         }
 840                 }
 841
 842                 self::removeSharer($contact);
 843         }
 844
 845         /**
 846          * Revoke follow privileges of the remote user contact
 847          *
 848          * The local relationship is updated immediately, the eventual remote server is messaged in the background.
 849          *
 850          * @param array $contact User-specific contact array (uid != 0) to revoke the follow from
 851          * @throws HTTPException\InternalServerErrorException
 852          * @throws \ImagickException
 853          */
 854         public static function revokeFollow(array $contact): void
 855         {
 856                 if (empty($contact['network'])) {
 857                         throw new \InvalidArgumentException('Empty network in contact array');
 858                 }
 859
 860                 if (empty($contact['uid'])) {
 861                         throw new \InvalidArgumentException('Unexpected public contact record');
 862                 }
 863
 864                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 865                         $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
 866                         if (!empty($cdata['public'])) {
 867                                 Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 868                         }
 869                 }
 870
 871                 self::removeFollower($contact);
 872         }
 873
 874         /**
 875          * Completely severs a relationship with a contact
 876          *
 877          * @param array $contact User-specific contact (uid != 0) array
 878          * @throws HTTPException\InternalServerErrorException
 879          * @throws \ImagickException
 880          */
 881         public static function terminateFriendship(array $contact)
 882         {
 883                 if (empty($contact['network'])) {
 884                         throw new \InvalidArgumentException('Empty network in contact array');
 885                 }
 886
 887                 if (empty($contact['uid'])) {
 888                         throw new \InvalidArgumentException('Unexpected public contact record');
 889                 }
 890
 891                 $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
 892
 893                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND]) && !empty($cdata['public'])) {
 894                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 895                 }
 896
 897                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) && !empty($cdata['public'])) {
 898                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 899                 }
 900
 901                 self::remove($contact['id']);
 902         }
 903
 904         private static function clearFollowerFollowingEndpointCache(int $uid)
 905         {
 906                 if (empty($uid)) {
 907                         return;
 908                 }
 909
 910                 DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_CONTACTS . 'followers:' . $uid);
 911                 DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_CONTACTS . 'following:' . $uid);
 912         }
 913
 914         /**
 915          * Marks a contact for archival after a communication issue delay
 916          *
 917          * Contact has refused to recognise us as a friend. We will start a countdown.
 918          * If they still don't recognise us in 32 days, the relationship is over,
 919          * and we won't waste any more time trying to communicate with them.
 920          * This provides for the possibility that their database is temporarily messed
 921          * up or some other transient event and that there's a possibility we could recover from it.
 922          *
 923          * @param array $contact contact to mark for archival
 924          * @return null
 925          * @throws HTTPException\InternalServerErrorException
 926          */
 927         public static function markForArchival(array $contact)
 928         {
 929                 if (!isset($contact['url']) && !empty($contact['id'])) {
 930                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 931                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 932                         if (!DBA::isResult($contact)) {
 933                                 return;
 934                         }
 935                 } elseif (!isset($contact['url'])) {
 936                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 937                 }
 938
 939                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 940
 941                 // Contact already archived or "self" contact? => nothing to do
 942                 if ($contact['archive'] || $contact['self']) {
 943                         return;
 944                 }
 945
 946                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 947                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 948                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 949                 } else {
 950                         /* @todo
 951                          * We really should send a notification to the owner after 2-3 weeks
 952                          * so they won't be surprised when the contact vanishes and can take
 953                          * remedial action if this was a serious mistake or glitch
 954                          */
 955
 956                         /// @todo Check for contact vitality via probing
 957                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 958
 959                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 960                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 961                                 /* Relationship is really truly dead. archive them rather than
 962                                  * delete, though if the owner tries to unarchive them we'll start
 963                                  * the whole process over again.
 964                                  */
 965                                 self::update(['archive' => true], ['id' => $contact['id']]);
 966                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 967                         }
 968                 }
 969         }
 970
 971         /**
 972          * Cancels the archival countdown
 973          *
 974          * @see   Contact::markForArchival()
 975          *
 976          * @param array $contact contact to be unmarked for archival
 977          * @return null
 978          * @throws \Exception
 979          */
 980         public static function unmarkForArchival(array $contact)
 981         {
 982                 // Always unarchive the relay contact entry
 983                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 984                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 985                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 986                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 987                                 self::update($fields, $condition);
 988                         }
 989                 }
 990
 991                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 992                 $exists = DBA::exists('contact', $condition);
 993
 994                 // We don't need to update, we never marked this contact for archival
 995                 if (!$exists) {
 996                         return;
 997                 }
 998
 999                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
1000
1001                 if (!isset($contact['url']) && !empty($contact['id'])) {
1002                         $fields = ['id', 'url', 'batch'];
1003                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
1004                         if (!DBA::isResult($contact)) {
1005                                 return;
1006                         }
1007                 }
1008
1009                 // It's a miracle. Our dead contact has inexplicably come back to life.
1010                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
1011                 self::update($fields, ['id' => $contact['id']]);
1012                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1013         }
1014
1015         /**
1016          * Returns the data array for the photo menu of a given contact
1017          *
1018          * @param array $contact contact
1019          * @param int   $uid     optional, default 0
1020          * @return array
1021          * @throws HTTPException\InternalServerErrorException
1022          * @throws \ImagickException
1023          */
1024         public static function photoMenu(array $contact, $uid = 0)
1025         {
1026                 $pm_url = '';
1027                 $status_link = '';
1028                 $photos_link = '';
1029                 $poke_link = '';
1030
1031                 if ($uid == 0) {
1032                         $uid = local_user();
1033                 }
1034
1035                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1036                         if ($uid == 0) {
1037                                 $profile_link = self::magicLinkByContact($contact);
1038                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1039
1040                                 return $menu;
1041                         }
1042
1043                         // Look for our own contact if the uid doesn't match and isn't public
1044                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1045                         if (DBA::isResult($contact_own)) {
1046                                 return self::photoMenu($contact_own, $uid);
1047                         }
1048                 }
1049
1050                 $sparkle = false;
1051                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1052                         $sparkle = true;
1053                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1054                 } else {
1055                         $profile_link = $contact['url'];
1056                 }
1057
1058                 if ($profile_link === 'mailbox') {
1059                         $profile_link = '';
1060                 }
1061
1062                 if ($sparkle) {
1063                         $status_link = $profile_link . '/status';
1064                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1065                         $profile_link = $profile_link . '/profile';
1066                 }
1067
1068                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1069                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1070                 }
1071
1072                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1073                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1074                 }
1075
1076                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1077
1078                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1079
1080                 $follow_link = '';
1081                 $unfollow_link = '';
1082                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1083                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1084                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1085                         } elseif(!$contact['pending']) {
1086                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1087                         }
1088                 }
1089
1090                 /**
1091                  * Menu array:
1092                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1093                  */
1094                 if (empty($contact['uid'])) {
1095                         $menu = [
1096                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1097                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1098                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1099                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1100                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1101                         ];
1102                 } else {
1103                         $menu = [
1104                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1105                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1106                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1107                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1108                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1109                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1110                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1111                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1112                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1113                         ];
1114
1115                         if (!empty($contact['pending'])) {
1116                                 try {
1117                                         $intro = DI::intro()->selectForContact($contact['id']);
1118                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1119                                 } catch (IntroductionNotFoundException $exception) {
1120                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1121                                 }
1122                         }
1123                 }
1124
1125                 $args = ['contact' => $contact, 'menu' => &$menu];
1126
1127                 Hook::callAll('contact_photo_menu', $args);
1128
1129                 $menucondensed = [];
1130
1131                 foreach ($menu as $menuname => $menuitem) {
1132                         if ($menuitem[1] != '') {
1133                                 $menucondensed[$menuname] = $menuitem;
1134                         }
1135                 }
1136
1137                 return $menucondensed;
1138         }
1139
1140         /**
1141          * Fetch the contact id for a given URL and user
1142          *
1143          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1144          * `addr` or `alias`.
1145          *
1146          * If there's no record and we aren't looking for a public contact, we quit.
1147          * If there's one, we check that it isn't time to update the picture else we
1148          * directly return the found contact id.
1149          *
1150          * Second, we probe the provided $url whether it's http://server.tld/profile or
1151          * nick@server.tld. We quit if we can't get any info back.
1152          *
1153          * Third, we create the contact record if it doesn't exist
1154          *
1155          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1156          * if there's any updates
1157          *
1158          * @param string  $url       Contact URL
1159          * @param integer $uid       The user id for the contact (0 = public contact)
1160          * @param boolean $update    true = always update, false = never update, null = update when not found
1161          * @param array   $default   Default value for creating the contact when everything else fails
1162          *
1163          * @return integer Contact ID
1164          * @throws HTTPException\InternalServerErrorException
1165          * @throws \ImagickException
1166          */
1167         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1168         {
1169                 $contact_id = 0;
1170
1171                 if ($url == '') {
1172                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1173                         return 0;
1174                 }
1175
1176                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1177
1178                 if (!empty($contact)) {
1179                         $contact_id = $contact["id"];
1180
1181                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1182                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1183                                 return $contact_id;
1184                         }
1185                 } elseif ($uid != 0) {
1186                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1187                         return 0;
1188                 } elseif (empty($default) && !is_null($update) && !$update) {
1189                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1190                         return 0;
1191                 }
1192
1193                 $data = [];
1194
1195                 if (empty($default['network']) || $update) {
1196                         $data = Probe::uri($url, "", $uid);
1197
1198                         // Take the default values when probing failed
1199                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1200                                 $data = array_merge($data, $default);
1201                         }
1202                 } elseif (!empty($default['network'])) {
1203                         $data = $default;
1204                 }
1205
1206                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1207                         // Fetch data for the public contact via the first found personal contact
1208                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1209                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1210                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1211                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1212
1213                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1214                         if (!DBA::isResult($personal_contact)) {
1215                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1216                         }
1217
1218                         if (DBA::isResult($personal_contact)) {
1219                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1220                                 $data = $personal_contact;
1221                                 $data['photo'] = $personal_contact['avatar'];
1222                                 $data['account-type'] = $personal_contact['contact-type'];
1223                                 $data['hide'] = $personal_contact['unsearchable'];
1224                                 unset($data['avatar']);
1225                                 unset($data['contact-type']);
1226                                 unset($data['unsearchable']);
1227                         }
1228                 }
1229
1230                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1231                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1232                         return 0;
1233                 }
1234
1235                 if (!$contact_id) {
1236                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1237                         if (!empty($data['alias'])) {
1238                                 $urls[] = Strings::normaliseLink($data['alias']);
1239                         }
1240                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1241                         if (!empty($contact['id'])) {
1242                                 $contact_id = $contact['id'];
1243                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1244                         }
1245                 }
1246
1247                 if (!$contact_id) {
1248                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1249                         $fields = [
1250                                 'uid'       => $uid,
1251                                 'url'       => $data['url'],
1252                                 'nurl'      => Strings::normaliseLink($data['url']),
1253                                 'network'   => $data['network'],
1254                                 'created'   => DateTimeFormat::utcNow(),
1255                                 'rel'       => self::SHARING,
1256                                 'writable'  => 1,
1257                                 'blocked'   => 0,
1258                                 'readonly'  => 0,
1259                                 'pending'   => 0];
1260
1261                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1262
1263                         // Before inserting we do check if the entry does exist now.
1264                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1265                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1266                                 if (DBA::isResult($contact)) {
1267                                         $contact_id = $contact['id'];
1268                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1269                                 } else {
1270                                         $contact_id = self::insert($fields);
1271                                         if ($contact_id) {
1272                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1273                                         }
1274                                 }
1275                                 DI::lock()->release(self::LOCK_INSERT);
1276                         } else {
1277                                 Logger::warning('Contact lock had not been acquired');
1278                         }
1279
1280                         if (!$contact_id) {
1281                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1282                                 return 0;
1283                         }
1284                 } else {
1285                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1286                 }
1287
1288                 if ($data['network'] == Protocol::DIASPORA) {
1289                         FContact::updateFromProbeArray($data);
1290                 }
1291
1292                 self::updateFromProbeArray($contact_id, $data);
1293
1294                 // Don't return a number for a deleted account
1295                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1296                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1297                         return 0;
1298                 }
1299
1300                 return $contact_id;
1301         }
1302
1303         /**
1304          * Checks if the contact is archived
1305          *
1306          * @param int $cid contact id
1307          *
1308          * @return boolean Is the contact archived?
1309          * @throws HTTPException\InternalServerErrorException
1310          */
1311         public static function isArchived(int $cid)
1312         {
1313                 if ($cid == 0) {
1314                         return false;
1315                 }
1316
1317                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1318                 if (!DBA::isResult($contact)) {
1319                         return false;
1320                 }
1321
1322                 if ($contact['archive']) {
1323                         return true;
1324                 }
1325
1326                 // Check status of ActivityPub endpoints
1327                 $apcontact = APContact::getByURL($contact['url'], false);
1328                 if (!empty($apcontact)) {
1329                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1330                                 return true;
1331                         }
1332
1333                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1334                                 return true;
1335                         }
1336                 }
1337
1338                 // Check status of Diaspora endpoints
1339                 if (!empty($contact['batch'])) {
1340                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1341                         return DBA::exists('contact', $condition);
1342                 }
1343
1344                 return false;
1345         }
1346
1347         /**
1348          * Checks if the contact is blocked
1349          *
1350          * @param int $cid contact id
1351          *
1352          * @return boolean Is the contact blocked?
1353          * @throws HTTPException\InternalServerErrorException
1354          */
1355         public static function isBlocked($cid)
1356         {
1357                 if ($cid == 0) {
1358                         return false;
1359                 }
1360
1361                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1362                 if (!DBA::isResult($blocked)) {
1363                         return false;
1364                 }
1365
1366                 if (Network::isUrlBlocked($blocked['url'])) {
1367                         return true;
1368                 }
1369
1370                 return (bool) $blocked['blocked'];
1371         }
1372
1373         /**
1374          * Checks if the contact is hidden
1375          *
1376          * @param int $cid contact id
1377          *
1378          * @return boolean Is the contact hidden?
1379          * @throws \Exception
1380          */
1381         public static function isHidden($cid)
1382         {
1383                 if ($cid == 0) {
1384                         return false;
1385                 }
1386
1387                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1388                 if (!DBA::isResult($hidden)) {
1389                         return false;
1390                 }
1391                 return (bool) $hidden['hidden'];
1392         }
1393
1394         /**
1395          * Returns posts from a given contact url
1396          *
1397          * @param string $contact_url Contact URL
1398          * @param bool   $thread_mode
1399          * @param int    $update      Update mode
1400          * @param int    $parent      Item parent ID for the update mode
1401          * @param bool   $only_media  Only display media content
1402          * @return string posts in HTML
1403          * @throws \Exception
1404          */
1405         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1406         {
1407                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1408         }
1409
1410         /**
1411          * Returns posts from a given contact id
1412          *
1413          * @param int  $cid         Contact ID
1414          * @param bool $thread_mode
1415          * @param int  $update      Update mode
1416          * @param int  $parent      Item parent ID for the update mode
1417          * @param bool $only_media  Only display media content
1418          * @return string posts in HTML
1419          * @throws \Exception
1420          */
1421         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1422         {
1423                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1424                 if (!DBA::isResult($contact)) {
1425                         return '';
1426                 }
1427
1428                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1429                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1430                 } else {
1431                         $sql = "`uid` = ?";
1432                 }
1433
1434                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1435
1436                 if ($thread_mode) {
1437                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1438                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1439                 } else {
1440                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1441                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1442                 }
1443
1444                 if (!empty($parent)) {
1445                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1446                 } else {
1447                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1448                         if (!empty($last_received)) {
1449                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1450                         }
1451                 }
1452
1453                 if ($only_media) {
1454                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1455                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1456                 }
1457
1458                 if (DI::mode()->isMobile()) {
1459                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1460                                 DI::config()->get('system', 'itemspage_network_mobile'));
1461                 } else {
1462                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1463                                 DI::config()->get('system', 'itemspage_network'));
1464                 }
1465
1466                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1467
1468                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1469
1470                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1471                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1472                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1473                 } else {
1474                         $o = '';
1475                 }
1476
1477                 if ($thread_mode) {
1478                         $fields = ['uri-id', 'thr-parent-id', 'gravity', 'author-id', 'commented'];
1479                         $items = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
1480
1481                         if ($pager->getStart() == 0) {
1482                                 $cdata = self::getPublicAndUserContactID($cid, local_user());
1483                                 if (!empty($cdata['public'])) {
1484                                         $pinned = Post\Collection::selectToArrayForContact($cdata['public'], Post\Collection::FEATURED, $fields);
1485                                         $items = array_merge($items, $pinned);
1486                                 }
1487                         }
1488
1489                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'pinned_commented', local_user());
1490                 } else {
1491                         $fields = array_merge(Item::DISPLAY_FIELDLIST, ['featured']);
1492                         $items = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
1493
1494                         if ($pager->getStart() == 0) {
1495                                 $cdata = self::getPublicAndUserContactID($cid, local_user());
1496                                 if (!empty($cdata['public'])) {
1497                                         $condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
1498                                                 $cdata['public'], Post\Collection::FEATURED];
1499                                         $pinned = Post::toArray(Post::selectForUser(local_user(), $fields, $condition, $params));
1500                                         $items = array_merge($pinned, $items);
1501                                 }
1502                         }
1503
1504                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1505                 }
1506
1507                 if (!$update) {
1508                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1509                                 $o .= HTML::scrollLoader();
1510                         } else {
1511                                 $o .= $pager->renderMinimal(count($items));
1512                         }
1513                 }
1514
1515                 return $o;
1516         }
1517
1518         /**
1519          * Returns the account type name
1520          *
1521          * The function can be called with either the user or the contact array
1522          *
1523          * @param int $type type of contact or account
1524          * @return string
1525          */
1526         public static function getAccountType(int $type)
1527         {
1528                 switch ($type) {
1529                         case self::TYPE_ORGANISATION:
1530                                 $account_type = DI::l10n()->t("Organisation");
1531                                 break;
1532
1533                         case self::TYPE_NEWS:
1534                                 $account_type = DI::l10n()->t('News');
1535                                 break;
1536
1537                         case self::TYPE_COMMUNITY:
1538                                 $account_type = DI::l10n()->t("Forum");
1539                                 break;
1540
1541                         default:
1542                                 $account_type = "";
1543                                 break;
1544                 }
1545
1546                 return $account_type;
1547         }
1548
1549         /**
1550          * Blocks a contact
1551          *
1552          * @param int $cid
1553          * @return bool
1554          * @throws \Exception
1555          */
1556         public static function block($cid, $reason = null)
1557         {
1558                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1559
1560                 return $return;
1561         }
1562
1563         /**
1564          * Unblocks a contact
1565          *
1566          * @param int $cid
1567          * @return bool
1568          * @throws \Exception
1569          */
1570         public static function unblock($cid)
1571         {
1572                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1573
1574                 return $return;
1575         }
1576
1577         /**
1578          * Ensure that cached avatar exist
1579          *
1580          * @param integer $cid
1581          */
1582         public static function checkAvatarCache(int $cid)
1583         {
1584                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1585                 if (!DBA::isResult($contact)) {
1586                         return;
1587                 }
1588
1589                 if (Network::isLocalLink($contact['url'])) {
1590                         return;
1591                 }
1592
1593                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1594                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1595                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1596                                 self::updateAvatar($cid, $contact['avatar'], true);
1597                                 return;
1598                         }
1599                 } elseif (Photo::isPhotoURI($contact['photo']) || Photo::isPhotoURI($contact['thumb']) || Photo::isPhotoURI($contact['micro'])) {
1600                         Logger::info('Replacing legacy avatar cache', ['id' => $cid, 'contact' => $contact]);
1601                         self::updateAvatar($cid, $contact['avatar'], true);
1602                         return;
1603                 } elseif (DI::config()->get('system', 'avatar_cache') && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1604                         Logger::info('Adding avatar cache file', ['id' => $cid, 'contact' => $contact]);
1605                         self::updateAvatar($cid, $contact['avatar'], true);
1606                 return;
1607                 }
1608         }
1609
1610         /**
1611          * Return the photo path for a given contact array in the given size
1612          *
1613          * @param array $contact    contact array
1614          * @param string $field     Fieldname of the photo in the contact array
1615          * @param string $size      Size of the avatar picture
1616          * @param string $avatar    Avatar path that is displayed when no photo had been found
1617          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1618          * @return string photo path
1619          */
1620         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1621         {
1622                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1623
1624                 if (DI::config()->get('system', 'avatar_cache')) {
1625                         switch ($size) {
1626                                 case Proxy::SIZE_MICRO:
1627                                         if (!empty($contact['micro']) && !Photo::isPhotoURI($contact['micro'])) {
1628                                                 return $contact['micro'];
1629                                         }
1630                                         break;
1631                                 case Proxy::SIZE_THUMB:
1632                                         if (!empty($contact['thumb']) && !Photo::isPhotoURI($contact['thumb'])) {
1633                                                 return $contact['thumb'];
1634                                         }
1635                                         break;
1636                                 case Proxy::SIZE_SMALL:
1637                                         if (!empty($contact['photo']) && !Photo::isPhotoURI($contact['photo'])) {
1638                                                 return $contact['photo'];
1639                                         }
1640                                         break;
1641                         }
1642                 }
1643
1644                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1645         }
1646
1647         /**
1648          * Return the photo path for a given contact array
1649          *
1650          * @param array  $contact   Contact array
1651          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1652          * @return string photo path
1653          */
1654         public static function getPhoto(array $contact, bool $no_update = false)
1655         {
1656                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1657         }
1658
1659         /**
1660          * Return the photo path (thumb size) for a given contact array
1661          *
1662          * @param array  $contact   Contact array
1663          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1664          * @return string photo path
1665          */
1666         public static function getThumb(array $contact, bool $no_update = false)
1667         {
1668                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1669         }
1670
1671         /**
1672          * Return the photo path (micro size) for a given contact array
1673          *
1674          * @param array  $contact   Contact array
1675          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1676          * @return string photo path
1677          */
1678         public static function getMicro(array $contact, bool $no_update = false)
1679         {
1680                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1681         }
1682
1683         /**
1684          * Check the given contact array for avatar cache fields
1685          *
1686          * @param array $contact
1687          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1688          * @return array contact array with avatar cache fields
1689          */
1690         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1691         {
1692                 $update = false;
1693                 $contact_fields = [];
1694                 $fields = ['photo', 'thumb', 'micro'];
1695                 foreach ($fields as $field) {
1696                         if (isset($contact[$field])) {
1697                                 $contact_fields[] = $field;
1698                         }
1699                         if (isset($contact[$field]) && empty($contact[$field])) {
1700                                 $update = true;
1701                         }
1702                 }
1703
1704                 if (!$update || $no_update) {
1705                         return $contact;
1706                 }
1707
1708                 $local = !empty($contact['url']) && Network::isLocalLink($contact['url']);
1709
1710                 if (!$local && !empty($contact['id']) && !empty($contact['avatar'])) {
1711                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1712
1713                         $new_contact = self::getById($contact['id'], $contact_fields);
1714                         if (DBA::isResult($new_contact)) {
1715                                 // We only update the cache fields
1716                                 $contact = array_merge($contact, $new_contact);
1717                         }
1718                 } elseif ($local && !empty($contact['avatar'])) {
1719                         return $contact;
1720                 }
1721
1722                 /// add the default avatars if the fields aren't filled
1723                 if (isset($contact['photo']) && empty($contact['photo'])) {
1724                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1725                 }
1726                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1727                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1728                 }
1729                 if (isset($contact['micro']) && empty($contact['micro'])) {
1730                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1731                 }
1732
1733                 return $contact;
1734         }
1735
1736         /**
1737          * Fetch the default header for the given contact
1738          *
1739          * @param array $contact  contact array
1740          * @return string avatar URL
1741          */
1742         public static function getDefaultHeader(array $contact): string
1743         {
1744                 if (!empty($contact['header'])) {
1745                         return $contact['header'];
1746                 }
1747
1748                 if (!empty($contact['gsid'])) {
1749                         // Use default banners for certain platforms
1750                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1751                         $platform = strtolower($gserver['platform'] ?? '');
1752                 } else {
1753                         $platform = '';
1754                 }
1755
1756                 switch ($platform) {
1757                         case 'friendica':
1758                         case 'friendika':
1759                                 /**
1760                                  * Picture credits
1761                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1762                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1763                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1764                                  */
1765                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1766                                 break;
1767                         case 'diaspora':
1768                                 /**
1769                                  * Picture credits
1770                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1771                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1772                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1773                                  */
1774                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1775                                 break;
1776                         default:
1777                                 /**
1778                                  * Use a random picture.
1779                                  * The service provides random pictures from Unsplash.
1780                                  * @license https://unsplash.com/license
1781                                  */
1782                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1783                                 break;
1784                 }
1785
1786                 return $header;
1787         }
1788
1789         /**
1790          * Fetch the default avatar for the given contact and size
1791          *
1792          * @param array $contact  contact array
1793          * @param string $size    Size of the avatar picture
1794          * @return string avatar URL
1795          */
1796         public static function getDefaultAvatar(array $contact, string $size)
1797         {
1798                 switch ($size) {
1799                         case Proxy::SIZE_MICRO:
1800                                 $avatar['size'] = 48;
1801                                 $default = self::DEFAULT_AVATAR_MICRO;
1802                                 break;
1803
1804                         case Proxy::SIZE_THUMB:
1805                                 $avatar['size'] = 80;
1806                                 $default = self::DEFAULT_AVATAR_THUMB;
1807                                 break;
1808
1809                         case Proxy::SIZE_SMALL:
1810                         default:
1811                                 $avatar['size'] = 300;
1812                                 $default = self::DEFAULT_AVATAR_PHOTO;
1813                                 break;
1814                 }
1815
1816                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1817                         return DI::baseUrl() . $default;
1818                 }
1819
1820                 if (!empty($contact['xmpp'])) {
1821                         $avatar['email'] = $contact['xmpp'];
1822                 } elseif (!empty($contact['addr'])) {
1823                         $avatar['email'] = $contact['addr'];
1824                 } elseif (!empty($contact['url'])) {
1825                         $avatar['email'] = $contact['url'];
1826                 } else {
1827                         return DI::baseUrl() . $default;
1828                 }
1829
1830                 $avatar['url'] = '';
1831                 $avatar['success'] = false;
1832
1833                 Hook::callAll('avatar_lookup', $avatar);
1834
1835                 if ($avatar['success'] && !empty($avatar['url'])) {
1836                         return $avatar['url'];
1837                 }
1838
1839                 return DI::baseUrl() . $default;
1840         }
1841
1842         /**
1843          * Get avatar link for given contact id
1844          *
1845          * @param integer $cid     contact id
1846          * @param string  $size    One of the Proxy::SIZE_* constants
1847          * @param string  $updated Contact update date
1848          * @return string avatar link
1849          */
1850         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1851         {
1852                 // We have to fetch the "updated" variable when it wasn't provided
1853                 // The parameter can be provided to improve performance
1854                 if (empty($updated)) {
1855                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1856                         $updated = $account['updated'] ?? '';
1857                         $guid = $account['guid'] ?? '';
1858                 }
1859
1860                 $guid = urlencode($guid);
1861
1862                 $url = DI::baseUrl() . '/photo/contact/';
1863                 switch ($size) {
1864                         case Proxy::SIZE_MICRO:
1865                                 $url .= Proxy::PIXEL_MICRO . '/';
1866                                 break;
1867                         case Proxy::SIZE_THUMB:
1868                                 $url .= Proxy::PIXEL_THUMB . '/';
1869                                 break;
1870                         case Proxy::SIZE_SMALL:
1871                                 $url .= Proxy::PIXEL_SMALL . '/';
1872                                 break;
1873                         case Proxy::SIZE_MEDIUM:
1874                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1875                                 break;
1876                         case Proxy::SIZE_LARGE:
1877                                 $url .= Proxy::PIXEL_LARGE . '/';
1878                                 break;
1879                 }
1880                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1881         }
1882
1883         /**
1884          * Get avatar link for given contact URL
1885          *
1886          * @param string  $url  contact url
1887          * @param integer $uid  user id
1888          * @param string  $size One of the Proxy::SIZE_* constants
1889          * @return string avatar link
1890          */
1891         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1892         {
1893                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1894                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1895                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1896                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1897         }
1898
1899         /**
1900          * Get header link for given contact id
1901          *
1902          * @param integer $cid     contact id
1903          * @param string  $size    One of the Proxy::SIZE_* constants
1904          * @param string  $updated Contact update date
1905          * @return string header link
1906          */
1907         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1908         {
1909                 // We have to fetch the "updated" variable when it wasn't provided
1910                 // The parameter can be provided to improve performance
1911                 if (empty($updated) || empty($guid)) {
1912                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1913                         $updated = $account['updated'] ?? '';
1914                         $guid = $account['guid'] ?? '';
1915                 }
1916
1917                 $guid = urlencode($guid);
1918
1919                 $url = DI::baseUrl() . '/photo/header/';
1920                 switch ($size) {
1921                         case Proxy::SIZE_MICRO:
1922                                 $url .= Proxy::PIXEL_MICRO . '/';
1923                                 break;
1924                         case Proxy::SIZE_THUMB:
1925                                 $url .= Proxy::PIXEL_THUMB . '/';
1926                                 break;
1927                         case Proxy::SIZE_SMALL:
1928                                 $url .= Proxy::PIXEL_SMALL . '/';
1929                                 break;
1930                         case Proxy::SIZE_MEDIUM:
1931                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1932                                 break;
1933                         case Proxy::SIZE_LARGE:
1934                                 $url .= Proxy::PIXEL_LARGE . '/';
1935                                 break;
1936                 }
1937
1938                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1939         }
1940
1941         /**
1942          * Updates the avatar links in a contact only if needed
1943          *
1944          * @param int    $cid          Contact id
1945          * @param string $avatar       Link to avatar picture
1946          * @param bool   $force        force picture update
1947          * @param bool   $create_cache Enforces the creation of cached avatar fields
1948          *
1949          * @return void
1950          * @throws HTTPException\InternalServerErrorException
1951          * @throws HTTPException\NotFoundException
1952          * @throws \ImagickException
1953          */
1954         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1955         {
1956                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network', 'uri-id'],
1957                         ['id' => $cid, 'self' => false]);
1958                 if (!DBA::isResult($contact)) {
1959                         return;
1960                 }
1961
1962                 $uid = $contact['uid'];
1963
1964                 // Only update the cached photo links of public contacts when they already are cached
1965                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1966                         if ($contact['avatar'] != $avatar) {
1967                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1968                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1969                         }
1970                         return;
1971                 }
1972
1973                 // User contacts use are updated through the public contacts
1974                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1975                         $pcid = self::getIdForURL($contact['url'], 0, false);
1976                         if (!empty($pcid)) {
1977                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1978                                 self::updateAvatar($pcid, $avatar, $force, true);
1979                                 return;
1980                         }
1981                 }
1982
1983                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1984
1985                 if ($default_avatar) {
1986                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1987                 }
1988
1989                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
1990
1991                 // Local contact avatars don't need to be cached
1992                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
1993                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
1994                 }
1995
1996                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
1997                         Avatar::deleteCache($contact);
1998
1999                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
2000                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
2001                                         'photo' => $avatar,
2002                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
2003                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
2004                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
2005                         }
2006
2007                         // Use the data from the self account
2008                         if (empty($fields)) {
2009                                 $local_uid = User::getIdForURL($contact['url']);
2010                                 if (!empty($local_uid)) {
2011                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
2012                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
2013                                 }
2014                         }
2015
2016                         if (empty($fields)) {
2017                                 $update = ($contact['avatar'] != $avatar) || $force;
2018
2019                                 if (!$update) {
2020                                         $data = [
2021                                                 $contact['photo'] ?? '',
2022                                                 $contact['thumb'] ?? '',
2023                                                 $contact['micro'] ?? '',
2024                                         ];
2025
2026                                         foreach ($data as $image_uri) {
2027                                                 $image_rid = Photo::ridFromURI($image_uri);
2028                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
2029                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
2030                                                         $update = true;
2031                                                 }
2032                                         }
2033                                 }
2034
2035                                 if ($update) {
2036                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
2037                                         if ($photos) {
2038                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
2039                                                 $update = !empty($fields);
2040                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
2041                                         } else {
2042                                                 $update = false;
2043                                         }
2044                                 }
2045                         } else {
2046                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
2047                         }
2048                 } else {
2049                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
2050                         $fields = Avatar::fetchAvatarContact($contact, $avatar);
2051                         $update = ($avatar . $fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
2052                 }
2053
2054                 if (!$update) {
2055                         return;
2056                 }
2057
2058                 $cids = [];
2059                 $uids = [];
2060                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2061                         // Collect all user contacts of the given public contact
2062                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
2063                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
2064                         while ($personal_contact = DBA::fetch($personal_contacts)) {
2065                                 $cids[] = $personal_contact['id'];
2066                                 $uids[] = $personal_contact['uid'];
2067                         }
2068                         DBA::close($personal_contacts);
2069
2070                         if (!empty($cids)) {
2071                                 // Delete possibly existing cached user contact avatars
2072                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
2073                         }
2074                 }
2075
2076                 $cids[] = $cid;
2077                 $uids[] = $uid;
2078                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2079                 self::update($fields, ['id' => $cids]);
2080         }
2081
2082         public static function deleteContactByUrl(string $url)
2083         {
2084                 // Update contact data for all users
2085                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2086                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2087                 while ($contact = DBA::fetch($contacts)) {
2088                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2089                         self::remove($contact['id']);
2090                 }
2091         }
2092
2093         /**
2094          * Helper function for "updateFromProbe". Updates personal and public contact
2095          *
2096          * @param integer $id      contact id
2097          * @param integer $uid     user id
2098          * @param string  $old_url The previous profile URL of the contact
2099          * @param string  $new_url The profile URL of the contact
2100          * @param array   $fields  The fields that are updated
2101          *
2102          * @throws \Exception
2103          */
2104         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
2105         {
2106                 if (!self::update($fields, ['id' => $id])) {
2107                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2108                         return;
2109                 }
2110
2111                 // Search for duplicated contacts and get rid of them
2112                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
2113                         return;
2114                 }
2115
2116                 // Archive or unarchive the contact.
2117                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2118                 if (!DBA::isResult($contact)) {
2119                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2120                         return;
2121                 }
2122
2123                 if (isset($fields['failed'])) {
2124                         if ($fields['failed']) {
2125                                 self::markForArchival($contact);
2126                         } else {
2127                                 self::unmarkForArchival($contact);
2128                         }
2129                 }
2130
2131                 if ($contact['uid'] != 0) {
2132                         return;
2133                 }
2134
2135                 // Update contact data for all users
2136                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
2137
2138                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2139                 self::update($fields, $condition);
2140
2141                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2142                 $condition['network'] = Protocol::OSTATUS;
2143
2144                 // If the contact failed, propagate the update fields to all contacts
2145                 if (empty($fields['failed'])) {
2146                         unset($fields['last-update']);
2147                         unset($fields['success_update']);
2148                         unset($fields['failure_update']);
2149                 }
2150
2151                 if (empty($fields)) {
2152                         return;
2153                 }
2154
2155                 self::update($fields, $condition);
2156         }
2157
2158         /**
2159          * Remove duplicated contacts
2160          *
2161          * @param string  $nurl  Normalised contact url
2162          * @param integer $uid   User id
2163          * @return boolean
2164          * @throws \Exception
2165          */
2166         public static function removeDuplicates(string $nurl, int $uid)
2167         {
2168                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2169                 $count = DBA::count('contact', $condition);
2170                 if ($count <= 1) {
2171                         return false;
2172                 }
2173
2174                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2175                 if (!DBA::isResult($first_contact)) {
2176                         // Shouldn't happen - so we handle it
2177                         return false;
2178                 }
2179
2180                 $first = $first_contact['id'];
2181                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2182                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2183                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2184                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2185                         return false;
2186                 }
2187
2188                 // Find all duplicates
2189                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2190                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2191                 while ($duplicate = DBA::fetch($duplicates)) {
2192                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2193                                 continue;
2194                         }
2195
2196                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2197                 }
2198                 DBA::close($duplicates);
2199                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2200                 return true;
2201         }
2202
2203         /**
2204          * @param integer $id      contact id
2205          * @param string  $network Optional network we are probing for
2206          * @return boolean
2207          * @throws HTTPException\InternalServerErrorException
2208          * @throws \ImagickException
2209          */
2210         public static function updateFromProbe(int $id, string $network = '')
2211         {
2212                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2213                 if (!DBA::isResult($contact)) {
2214                         return false;
2215                 }
2216
2217                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2218
2219                 if ($ret['network'] == Protocol::DIASPORA) {
2220                         FContact::updateFromProbeArray($ret);
2221                 }
2222
2223                 return self::updateFromProbeArray($id, $ret);
2224         }
2225
2226         /**
2227          * @param integer $id      contact id
2228          * @param array   $ret     Probed data
2229          * @return boolean
2230          * @throws HTTPException\InternalServerErrorException
2231          * @throws \ImagickException
2232          */
2233         private static function updateFromProbeArray(int $id, array $ret)
2234         {
2235                 /*
2236                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2237                   This will reliably kill your communication with old Friendica contacts.
2238                  */
2239
2240                 // These fields aren't updated by this routine:
2241                 // 'sensitive'
2242
2243                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2244                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2245                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2246                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2247                 if (!DBA::isResult($contact)) {
2248                         return false;
2249                 }
2250
2251                 if (self::isLocal($ret['url'])) {
2252                         if ($contact['uid'] == 0) {
2253                                 Logger::info('Local contacts are not updated here.');
2254                         } else {
2255                                 self::updateFromPublicContact($id, $contact);
2256                         }
2257                         return true;
2258                 }
2259
2260                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2261                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2262                         self::remove($id);
2263
2264                         // Delete all contacts with the same URL
2265                         self::deleteContactByUrl($ret['url']);
2266                         return true;
2267                 }
2268
2269                 $uid = $contact['uid'];
2270                 unset($contact['uid']);
2271
2272                 $uriid = $contact['uri-id'];
2273                 unset($contact['uri-id']);
2274
2275                 $pubkey = $contact['pubkey'];
2276                 unset($contact['pubkey']);
2277
2278                 $contact['photo'] = $contact['avatar'];
2279                 unset($contact['avatar']);
2280
2281                 $updated = DateTimeFormat::utcNow();
2282
2283                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2284                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2285                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2286                         return false;
2287                 }
2288
2289                 // We must not try to update relay contacts via probe. They are no real contacts.
2290                 // We check after the probing to be able to correct falsely detected contact types.
2291                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2292                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2293                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2294                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2295                         return true;
2296                 }
2297
2298                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2299                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2300                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2301                         return false;
2302                 }
2303
2304                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2305                         $cid = self::getIdForURL($ret['url'], 0, false);
2306                         if (!empty($cid) && ($cid != $id)) {
2307                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2308                                 return self::updateFromProbeArray($cid, $ret);
2309                         }
2310                 }
2311
2312                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2313                         $ret['unsearchable'] = $ret['hide'];
2314                 }
2315
2316                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2317                         $ret['forum'] = false;
2318                         $ret['prv'] = false;
2319                         $ret['contact-type'] = $ret['account-type'];
2320                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2321                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2322                                 $ret['prv'] = (bool)!$ret['forum'];
2323                         }
2324                 }
2325
2326                 $new_pubkey = $ret['pubkey'] ?? '';
2327
2328                 if ($uid == 0) {
2329                         if ($ret['network'] == Protocol::ACTIVITYPUB) {
2330                                 $apcontact = APContact::getByURL($ret['url'], false);
2331                                 if (!empty($apcontact['featured'])) {
2332                                         Worker::add(PRIORITY_LOW, 'FetchFeaturedPosts', $ret['url']);
2333                                 }
2334                         }
2335
2336                         $ret['last-item'] = Probe::getLastUpdate($ret);
2337                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2338                 }
2339
2340                 $update = false;
2341                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2342
2343                 // make sure to not overwrite existing values with blank entries except some technical fields
2344                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2345                 foreach ($ret as $key => $val) {
2346                         if (!array_key_exists($key, $contact)) {
2347                                 unset($ret[$key]);
2348                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2349                                 $ret[$key] = $contact[$key];
2350                         } elseif ($ret[$key] != $contact[$key]) {
2351                                 $update = true;
2352                         }
2353                 }
2354
2355                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2356                         $update = true;
2357                 } else {
2358                         unset($ret['last-item']);
2359                 }
2360
2361                 if (empty($uriid)) {
2362                         $update = true;
2363                 }
2364
2365                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2366                         self::updateAvatar($id, $ret['photo'], $update);
2367                 }
2368
2369                 $uriid = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2370
2371                 if (!$update) {
2372                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2373
2374                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2375                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2376                         }
2377
2378                         // Update the public contact
2379                         if ($uid != 0) {
2380                                 $contact = self::getByURL($ret['url'], false, ['id']);
2381                                 if (!empty($contact['id'])) {
2382                                         self::updateFromProbeArray($contact['id'], $ret);
2383                                 }
2384                         }
2385
2386                         return true;
2387                 }
2388
2389                 $ret['uri-id']  = $uriid;
2390                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2391                 $ret['updated'] = $updated;
2392                 $ret['failed']  = false;
2393
2394                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2395                 if (empty($pubkey) && !empty($new_pubkey)) {
2396                         $ret['pubkey'] = $new_pubkey;
2397                 }
2398
2399                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2400                         $ret['uri-date'] = $updated;
2401                 }
2402
2403                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2404                         $ret['name-date'] = $updated;
2405                 }
2406
2407                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2408                         $ret['last-update'] = $updated;
2409                         $ret['success_update'] = $updated;
2410                 }
2411
2412                 unset($ret['photo']);
2413
2414                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2415
2416                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2417                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2418                 }
2419
2420                 return true;
2421         }
2422
2423         private static function updateFromPublicContact(int $id, array $contact)
2424         {
2425                 $public = self::getByURL($contact['url'], false);
2426
2427                 $fields = [];
2428
2429                 foreach ($contact as $field => $value) {
2430                         if ($field == 'uid') {
2431                                 continue;
2432                         }
2433                         if ($public[$field] != $value) {
2434                                 $fields[$field] = $public[$field];
2435                         }
2436                 }
2437                 if (!empty($fields)) {
2438                         self::update($fields, ['id' => $id, 'self' => false]);
2439                         Logger::info('Updating local contact', ['id' => $id]);
2440                 }
2441         }
2442
2443         /**
2444          * @param integer $url contact url
2445          * @return integer Contact id
2446          * @throws HTTPException\InternalServerErrorException
2447          * @throws \ImagickException
2448          */
2449         public static function updateFromProbeByURL($url)
2450         {
2451                 $id = self::getIdForURL($url);
2452
2453                 if (empty($id)) {
2454                         return $id;
2455                 }
2456
2457                 self::updateFromProbe($id);
2458
2459                 return $id;
2460         }
2461
2462         /**
2463          * Detects the communication protocol for a given contact url.
2464          * This is used to detect Friendica contacts that we can communicate via AP.
2465          *
2466          * @param string $url contact url
2467          * @param string $network Network of that contact
2468          * @return string with protocol
2469          */
2470         public static function getProtocol($url, $network)
2471         {
2472                 if ($network != Protocol::DFRN) {
2473                         return $network;
2474                 }
2475
2476                 $apcontact = APContact::getByURL($url);
2477                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2478                         return Protocol::ACTIVITYPUB;
2479                 } else {
2480                         return $network;
2481                 }
2482         }
2483
2484         /**
2485          * Takes a $uid and a url/handle and adds a new contact
2486          *
2487          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2488          * dfrn_request page.
2489          *
2490          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2491          *
2492          * Returns an array
2493          * $return['success'] boolean true if successful
2494          * $return['message'] error text if success is false.
2495          *
2496          * Takes a $uid and a url/handle and adds a new contact
2497          *
2498          * @param int    $uid         The user id the contact should be created for
2499          * @param string $url         The profile URL of the contact
2500          * @param string $network
2501          * @return array
2502          * @throws HTTPException\InternalServerErrorException
2503          * @throws HTTPException\NotFoundException
2504          * @throws \ImagickException
2505          */
2506         public static function createFromProbeForUser(int $uid, $url, $network = '')
2507         {
2508                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2509
2510                 // remove ajax junk, e.g. Twitter
2511                 $url = str_replace('/#!/', '/', $url);
2512
2513                 if (!Network::isUrlAllowed($url)) {
2514                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2515                         return $result;
2516                 }
2517
2518                 if (Network::isUrlBlocked($url)) {
2519                         $result['message'] = DI::l10n()->t('Blocked domain');
2520                         return $result;
2521                 }
2522
2523                 if (!$url) {
2524                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2525                         return $result;
2526                 }
2527
2528                 $arr = ['url' => $url, 'contact' => []];
2529
2530                 Hook::callAll('follow', $arr);
2531
2532                 if (empty($arr)) {
2533                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2534                         return $result;
2535                 }
2536
2537                 if (!empty($arr['contact']['name'])) {
2538                         $probed = false;
2539                         $ret = $arr['contact'];
2540                 } else {
2541                         $probed = true;
2542                         $ret = Probe::uri($url, $network, $uid);
2543                 }
2544
2545                 if (($network != '') && ($ret['network'] != $network)) {
2546                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2547                         return $result;
2548                 }
2549
2550                 // check if we already have a contact
2551                 // the poll url is more reliable than the profile url, as we may have
2552                 // indirect links or webfinger links
2553
2554                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2555                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2556                 if (!DBA::isResult($contact)) {
2557                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2558                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2559                 }
2560
2561                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2562
2563                 // This extra param just confuses things, remove it
2564                 if ($protocol === Protocol::DIASPORA) {
2565                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2566                 }
2567
2568                 // do we have enough information?
2569                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2570                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2571                         if (empty($ret['poll'])) {
2572                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2573                         }
2574                         if (empty($ret['name'])) {
2575                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2576                         }
2577                         if (empty($ret['url'])) {
2578                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2579                         }
2580                         if (strpos($ret['url'], '@') !== false) {
2581                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2582                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2583                         }
2584                         return $result;
2585                 }
2586
2587                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2588                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2589                         $ret['notify'] = '';
2590                 }
2591
2592                 if (!$ret['notify']) {
2593                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2594                 }
2595
2596                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2597
2598                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2599
2600                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2601
2602                 $pending = false;
2603                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2604                         $pending = (bool)$ret['manually-approve'];
2605                 }
2606
2607                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2608                         $writeable = 1;
2609                 }
2610
2611                 if (DBA::isResult($contact)) {
2612                         // update contact
2613                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2614
2615                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2616                         self::update($fields, ['id' => $contact['id']]);
2617                 } else {
2618                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2619
2620                         // create contact record
2621                         self::insert([
2622                                 'uid'     => $uid,
2623                                 'created' => DateTimeFormat::utcNow(),
2624                                 'url'     => $ret['url'],
2625                                 'nurl'    => Strings::normaliseLink($ret['url']),
2626                                 'addr'    => $ret['addr'],
2627                                 'alias'   => $ret['alias'],
2628                                 'batch'   => $ret['batch'],
2629                                 'notify'  => $ret['notify'],
2630                                 'poll'    => $ret['poll'],
2631                                 'poco'    => $ret['poco'],
2632                                 'name'    => $ret['name'],
2633                                 'nick'    => $ret['nick'],
2634                                 'network' => $ret['network'],
2635                                 'baseurl' => $ret['baseurl'],
2636                                 'gsid'    => $ret['gsid'] ?? null,
2637                                 'protocol' => $protocol,
2638                                 'pubkey'  => $ret['pubkey'],
2639                                 'rel'     => $new_relation,
2640                                 'priority'=> $ret['priority'],
2641                                 'writable'=> $writeable,
2642                                 'hidden'  => $hidden,
2643                                 'blocked' => 0,
2644                                 'readonly'=> 0,
2645                                 'pending' => $pending,
2646                                 'subhub'  => $subhub
2647                         ]);
2648                 }
2649
2650                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2651                 if (!DBA::isResult($contact)) {
2652                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2653                         return $result;
2654                 }
2655
2656                 $contact_id = $contact['id'];
2657                 $result['cid'] = $contact_id;
2658
2659                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
2660
2661                 // Update the avatar
2662                 self::updateAvatar($contact_id, $ret['photo']);
2663
2664                 // pull feed and consume it, which should subscribe to the hub.
2665                 if ($contact['network'] == Protocol::OSTATUS) {
2666                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2667                 }
2668
2669                 if ($probed) {
2670                         self::updateFromProbeArray($contact_id, $ret);
2671                 } else {
2672                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2673                 }
2674
2675                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
2676
2677                 return $result;
2678         }
2679
2680         /**
2681          * @param array  $importer Owner (local user) data
2682          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2683          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2684          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2685          * @param string $note     Introduction additional message
2686          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2687          * @throws HTTPException\InternalServerErrorException
2688          * @throws \ImagickException
2689          */
2690         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2691         {
2692                 // Should always be set
2693                 if (empty($datarray['author-id'])) {
2694                         return false;
2695                 }
2696
2697                 $fields = ['id', 'url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2698                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2699                 if (!DBA::isResult($pub_contact)) {
2700                         // Should never happen
2701                         return false;
2702                 }
2703
2704                 // Contact is blocked at node-level
2705                 if (self::isBlocked($datarray['author-id'])) {
2706                         return false;
2707                 }
2708
2709                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2710                 $name = $pub_contact['name'];
2711                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2712                 $nick = $pub_contact['nick'];
2713                 $network = $pub_contact['network'];
2714
2715                 // Ensure that we don't create a new contact when there already is one
2716                 $cid = self::getIdForURL($url, $importer['uid']);
2717                 if (!empty($cid)) {
2718                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2719                 }
2720
2721                 self::clearFollowerFollowingEndpointCache($importer['uid']);
2722
2723                 if (!empty($contact)) {
2724                         if (!empty($contact['pending'])) {
2725                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2726                                 return null;
2727                         }
2728
2729                         // Contact is blocked at user-level
2730                         if (!empty($contact['id']) && !empty($importer['id']) &&
2731                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2732                                 return false;
2733                         }
2734
2735                         // Make sure that the existing contact isn't archived
2736                         self::unmarkForArchival($contact);
2737
2738                         if (($contact['rel'] == self::SHARING)
2739                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2740                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2741                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2742                         }
2743
2744                         // Ensure to always have the correct network type, independent from the connection request method
2745                         self::updateFromProbe($contact['id']);
2746
2747                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
2748
2749                         return true;
2750                 } else {
2751                         // send email notification to owner?
2752                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2753                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
2754                                 return null;
2755                         }
2756
2757                         // create contact record
2758                         $contact_id = self::insert([
2759                                 'uid'      => $importer['uid'],
2760                                 'created'  => DateTimeFormat::utcNow(),
2761                                 'url'      => $url,
2762                                 'nurl'     => Strings::normaliseLink($url),
2763                                 'name'     => $name,
2764                                 'nick'     => $nick,
2765                                 'network'  => $network,
2766                                 'rel'      => self::FOLLOWER,
2767                                 'blocked'  => 0,
2768                                 'readonly' => 0,
2769                                 'pending'  => 1,
2770                                 'writable' => 1,
2771                         ]);
2772
2773                         // Ensure to always have the correct network type, independent from the connection request method
2774                         self::updateFromProbe($contact_id);
2775
2776                         self::updateAvatar($contact_id, $photo, true);
2777
2778                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
2779
2780                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2781
2782                         /// @TODO Encapsulate this into a function/method
2783                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2784                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2785                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2786                                 // create notification
2787                                 if (is_array($contact_record)) {
2788                                         $intro = DI::introFactory()->createNew(
2789                                                 $importer['uid'],
2790                                                 $contact_record['id'],
2791                                                 $note
2792                                         );
2793                                         DI::intro()->save($intro);
2794                                 }
2795
2796                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
2797
2798                                 if (($user['notify-flags'] & Notification\Type::INTRO) && $user['page-flags'] == User::PAGE_FLAGS_NORMAL) {
2799                                         DI::notify()->createFromArray([
2800                                                 'type'  => Notification\Type::INTRO,
2801                                                 'otype' => Notification\ObjectType::INTRO,
2802                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2803                                                 'uid'   => $user['uid'],
2804                                                 'cid'   => $contact_record['id'],
2805                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2806                                         ]);
2807                                 }
2808                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2809                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2810                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2811                                 }
2812
2813                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2814                                 $fields = ['pending' => false];
2815                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2816                                         $fields['rel'] = self::FRIEND;
2817                                 }
2818
2819                                 self::update($fields, $condition);
2820
2821                                 return true;
2822                         }
2823                 }
2824
2825                 return null;
2826         }
2827
2828         /**
2829          * Update the local relationship when a local user loses a follower
2830          *
2831          * @param array $contact User-specific contact (uid != 0) array
2832          * @throws HTTPException\InternalServerErrorException
2833          * @throws \ImagickException
2834          */
2835         public static function removeFollower(array $contact)
2836         {
2837                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2838                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
2839                 } elseif (!empty($contact['id'])) {
2840                         self::remove($contact['id']);
2841                 } else {
2842                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2843                         return;
2844                 }
2845
2846                 self::clearFollowerFollowingEndpointCache($contact['uid']);
2847
2848                 $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
2849
2850                 DI::notification()->deleteForUserByVerb($contact['uid'], Activity::FOLLOW, ['actor-id' => $cdata['public']]);
2851         }
2852
2853         /**
2854          * Update the local relationship when a local user unfollow a contact.
2855          * Removes the contact for sharing-only protocols (feed and mail).
2856          *
2857          * @param array $contact User-specific contact (uid != 0) array
2858          * @throws HTTPException\InternalServerErrorException
2859          */
2860         public static function removeSharer(array $contact)
2861         {
2862                 self::clearFollowerFollowingEndpointCache($contact['uid']);
2863
2864                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2865                         self::remove($contact['id']);
2866                 } else {
2867                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2868                 }
2869         }
2870
2871         /**
2872          * Create a birthday event.
2873          *
2874          * Update the year and the birthday.
2875          */
2876         public static function updateBirthdays()
2877         {
2878                 $condition = [
2879                         '`bd` > ?
2880                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2881                         AND NOT `contact`.`pending`
2882                         AND NOT `contact`.`hidden`
2883                         AND NOT `contact`.`blocked`
2884                         AND NOT `contact`.`archive`
2885                         AND NOT `contact`.`deleted`',
2886                         DBA::NULL_DATE,
2887                         self::SHARING,
2888                         self::FRIEND
2889                 ];
2890
2891                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2892
2893                 while ($contact = DBA::fetch($contacts)) {
2894                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
2895
2896                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2897
2898                         if (Event::createBirthday($contact, $nextbd)) {
2899                                 // update bdyear
2900                                 DBA::update(
2901                                         'contact',
2902                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2903                                         ['id' => $contact['id']]
2904                                 );
2905                         }
2906                 }
2907                 DBA::close($contacts);
2908         }
2909
2910         /**
2911          * Remove the unavailable contact ids from the provided list
2912          *
2913          * @param array $contact_ids Contact id list
2914          * @return array
2915          * @throws \Exception
2916          */
2917         public static function pruneUnavailable(array $contact_ids)
2918         {
2919                 if (empty($contact_ids)) {
2920                         return [];
2921                 }
2922
2923                 $contacts = self::selectToArray(['id'], [
2924                         'id'      => $contact_ids,
2925                         'blocked' => false,
2926                         'pending' => false,
2927                         'archive' => false,
2928                 ]);
2929
2930                 return array_column($contacts, 'id');
2931         }
2932
2933         /**
2934          * Returns a magic link to authenticate remote visitors
2935          *
2936          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2937          *
2938          * @param string $contact_url The address of the target contact profile
2939          * @param string $url         An url that we will be redirected to after the authentication
2940          *
2941          * @return string with "redir" link
2942          * @throws HTTPException\InternalServerErrorException
2943          * @throws \ImagickException
2944          */
2945         public static function magicLink($contact_url, $url = '')
2946         {
2947                 if (!Session::isAuthenticated()) {
2948                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2949                 }
2950
2951                 $contact = self::getByURL($contact_url, false);
2952                 if (empty($contact)) {
2953                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2954                 }
2955
2956                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2957                 unset($contact['uid']);
2958
2959                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2960         }
2961
2962         /**
2963          * Returns a magic link to authenticate remote visitors
2964          *
2965          * @param integer $cid The contact id of the target contact profile
2966          * @param string  $url An url that we will be redirected to after the authentication
2967          *
2968          * @return string with "redir" link
2969          * @throws HTTPException\InternalServerErrorException
2970          * @throws \ImagickException
2971          */
2972         public static function magicLinkById($cid, $url = '')
2973         {
2974                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2975
2976                 return self::magicLinkByContact($contact, $url);
2977         }
2978
2979         /**
2980          * Returns a magic link to authenticate remote visitors
2981          *
2982          * @param array  $contact The contact array with "uid", "network" and "url"
2983          * @param string $url     An url that we will be redirected to after the authentication
2984          *
2985          * @return string with "redir" link
2986          * @throws HTTPException\InternalServerErrorException
2987          * @throws \ImagickException
2988          */
2989         public static function magicLinkByContact($contact, $url = '')
2990         {
2991                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2992
2993                 if (!Session::isAuthenticated()) {
2994                         return $destination;
2995                 }
2996
2997                 // Only redirections to the same host do make sense
2998                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2999                         return $url;
3000                 }
3001
3002                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
3003                         return 'contact/' . $contact['id'] . '/conversations';
3004                 }
3005
3006                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
3007                         return $destination;
3008                 }
3009
3010                 if (empty($contact['id'])) {
3011                         return $destination;
3012                 }
3013
3014                 $redirect = 'redir/' . $contact['id'];
3015
3016                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
3017                         $redirect .= '?url=' . $url;
3018                 }
3019
3020                 return $redirect;
3021         }
3022
3023         /**
3024          * Is the contact a forum?
3025          *
3026          * @param integer $contactid ID of the contact
3027          *
3028          * @return boolean "true" if it is a forum
3029          */
3030         public static function isForum($contactid)
3031         {
3032                 $fields = ['contact-type'];
3033                 $condition = ['id' => $contactid];
3034                 $contact = DBA::selectFirst('contact', $fields, $condition);
3035                 if (!DBA::isResult($contact)) {
3036                         return false;
3037                 }
3038
3039                 // Is it a forum?
3040                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
3041         }
3042
3043         /**
3044          * Can the remote contact receive private messages?
3045          *
3046          * @param array $contact
3047          * @return bool
3048          */
3049         public static function canReceivePrivateMessages(array $contact)
3050         {
3051                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
3052                 $self = $contact['self'] ?? false;
3053
3054                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
3055         }
3056
3057         /**
3058          * Search contact table by nick or name
3059          *
3060          * @param string $search Name or nick
3061          * @param string $mode   Search mode (e.g. "community")
3062          * @param int    $uid    User ID
3063          *
3064          * @return array with search results
3065          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3066          */
3067         public static function searchByName(string $search, string $mode = '', int $uid = 0)
3068         {
3069                 if (empty($search)) {
3070                         return [];
3071                 }
3072
3073                 // check supported networks
3074                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
3075                 if (DI::config()->get('system', 'diaspora_enabled')) {
3076                         $networks[] = Protocol::DIASPORA;
3077                 }
3078
3079                 if (!DI::config()->get('system', 'ostatus_disabled')) {
3080                         $networks[] = Protocol::OSTATUS;
3081                 }
3082
3083                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
3084
3085                 if ($uid == 0) {
3086                         $condition['blocked'] = false;
3087                 }
3088
3089                 // check if we search only communities or every contact
3090                 if ($mode === 'community') {
3091                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3092                 }
3093
3094                 $search .= '%';
3095
3096                 $condition = DBA::mergeConditions($condition,
3097                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3098                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3099
3100                 $contacts = self::selectToArray([], $condition);
3101                 return $contacts;
3102         }
3103
3104         /**
3105          * Add public contacts from an array
3106          *
3107          * @param array $urls
3108          * @return array result "count", "added" and "updated"
3109          */
3110         public static function addByUrls(array $urls)
3111         {
3112                 $added = 0;
3113                 $updated = 0;
3114                 $unchanged = 0;
3115                 $count = 0;
3116
3117                 foreach ($urls as $url) {
3118                         if (empty($url) || !is_string($url)) {
3119                                 continue;
3120                         }
3121                         $contact = self::getByURL($url, false, ['id', 'updated']);
3122                         if (empty($contact['id'])) {
3123                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3124                                 ++$added;
3125                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3126                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3127                                 ++$updated;
3128                         } else {
3129                                 ++$unchanged;
3130                         }
3131                         ++$count;
3132                 }
3133
3134                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3135         }
3136
3137         /**
3138          * Returns a random, global contact array of the current node
3139          *
3140          * @return array The profile array
3141          * @throws Exception
3142          */
3143         public static function getRandomContact()
3144         {
3145                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3146                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3147                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3148                 ], ['order' => ['RAND()']]);
3149
3150                 if (DBA::isResult($contact)) {
3151                         return $contact;
3152                 }
3153
3154                 return [];
3155         }
3156 }