src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\App\BaseURL;
  25 use Friendica\Contact\Introduction\Exception\IntroductionNotFoundException;
  26 use Friendica\Content\Pager;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Renderer;
  32 use Friendica\Core\Session;
  33 use Friendica\Core\System;
  34 use Friendica\Core\Worker;
  35 use Friendica\Database\Database;
  36 use Friendica\Database\DBA;
  37 use Friendica\DI;
  38 use Friendica\Network\HTTPException;
  39 use Friendica\Network\Probe;
  40 use Friendica\Protocol\Activity;
  41 use Friendica\Util\DateTimeFormat;
  42 use Friendica\Util\Images;
  43 use Friendica\Util\Network;
  44 use Friendica\Util\Proxy;
  45 use Friendica\Util\Strings;
  46
  47 /**
  48  * functions for interacting with a contact
  49  */
  50 class Contact
  51 {
  52         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  53         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  54         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  55
  56         /**
  57          * @}
  58          */
  59
  60         const LOCK_INSERT = 'contact-insert';
  61
  62         /**
  63          * Account types
  64          *
  65          * TYPE_UNKNOWN - unknown type
  66          *
  67          * TYPE_PERSON - the account belongs to a person
  68          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  69          *
  70          * TYPE_ORGANISATION - the account belongs to an organisation
  71          *      Associated page type: PAGE_SOAPBOX
  72          *
  73          * TYPE_NEWS - the account is a news reflector
  74          *      Associated page type: PAGE_SOAPBOX
  75          *
  76          * TYPE_COMMUNITY - the account is community forum
  77          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
  78          *
  79          * TYPE_RELAY - the account is a relay
  80          *      This will only be assigned to contacts, not to user accounts
  81          * @{
  82          */
  83         const TYPE_UNKNOWN =     -1;
  84         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
  85         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
  86         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
  87         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
  88         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
  89         /**
  90          * @}
  91          */
  92
  93         /**
  94          * Contact_is
  95          *
  96          * Relationship types
  97          * @{
  98          */
  99         const NOTHING  = 0;
 100         const FOLLOWER = 1;
 101         const SHARING  = 2;
 102         const FRIEND   = 3;
 103         const SELF     = 4;
 104         /**
 105          * @}
 106          */
 107
 108          const MIRROR_DEACTIVATED = 0;
 109          const MIRROR_FORWARDED = 1;
 110          const MIRROR_OWN_POST = 2;
 111          const MIRROR_NATIVE_RESHARE = 3;
 112
 113          /**
 114          * @param array $fields    Array of selected fields, empty for all
 115          * @param array $condition Array of fields for condition
 116          * @param array $params    Array of several parameters
 117          * @return array
 118          * @throws \Exception
 119          */
 120         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 121         {
 122                 return DBA::selectToArray('contact', $fields, $condition, $params);
 123         }
 124
 125         /**
 126          * @param array $fields    Array of selected fields, empty for all
 127          * @param array $condition Array of fields for condition
 128          * @param array $params    Array of several parameters
 129          * @return array
 130          * @throws \Exception
 131          */
 132         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 133         {
 134                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 135
 136                 return $contact;
 137         }
 138
 139         /**
 140          * Insert a row into the contact table
 141          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 142          *
 143          * @param array $fields         field array
 144          * @param int   $duplicate_mode Do an update on a duplicate entry
 145          *
 146          * @return int  id of the created contact
 147          * @throws \Exception
 148          */
 149         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 150         {
 151                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 152                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 153                 }
 154
 155                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 156
 157                 if (empty($fields['created'])) {
 158                         $fields['created'] = DateTimeFormat::utcNow();
 159                 }
 160
 161                 DBA::insert('contact', $fields, $duplicate_mode);
 162                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 163                 if (!DBA::isResult($contact)) {
 164                         // Shouldn't happen
 165                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 166                         return 0;
 167                 }
 168
 169                 Contact\User::insertForContactArray($contact);
 170
 171                 // Search for duplicated contacts and get rid of them
 172                 if (!$contact['self']) {
 173                         self::removeDuplicates($contact['nurl'], $contact['uid']);
 174                 }
 175
 176                 return $contact['id'];
 177         }
 178
 179         /**
 180          * Updates rows in the contact table
 181          *
 182          * @param array         $fields     contains the fields that are updated
 183          * @param array         $condition  condition array with the key values
 184          * @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)
 185          *
 186          * @return boolean was the update successfull?
 187          * @throws \Exception
 188          */
 189         public static function update(array $fields, array $condition, $old_fields = [])
 190         {
 191                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 192
 193                 // Apply changes to the "user-contact" table on dedicated fields
 194                 Contact\User::updateByContactUpdate($fields, $condition);
 195
 196                 return $ret;
 197         }
 198
 199         /**
 200          * @param integer $id     Contact ID
 201          * @param array   $fields Array of selected fields, empty for all
 202          * @return array|boolean Contact record if it exists, false otherwise
 203          * @throws \Exception
 204          */
 205         public static function getById($id, $fields = [])
 206         {
 207                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 208         }
 209
 210         /**
 211          * Fetch the first contact with the provided uri-id.
 212          *
 213          * @param integer $uri_id uri-id of the contact
 214          * @param array   $fields Array of selected fields, empty for all
 215          * @return array|boolean Contact record if it exists, false otherwise
 216          * @throws \Exception
 217          */
 218         public static function getByUriId($uri_id, $fields = [])
 219         {
 220                 return DBA::selectFirst('contact', $fields, ['uri-id' => $uri_id], ['order' => ['uid']]);
 221         }
 222
 223         /**
 224          * Fetches a contact by a given url
 225          *
 226          * @param string  $url    profile url
 227          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 228          * @param array   $fields Field list
 229          * @param integer $uid    User ID of the contact
 230          * @return array contact array
 231          */
 232         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 233         {
 234                 if ($update || is_null($update)) {
 235                         $cid = self::getIdForURL($url, $uid, $update);
 236                         if (empty($cid)) {
 237                                 return [];
 238                         }
 239
 240                         $contact = self::getById($cid, $fields);
 241                         if (empty($contact)) {
 242                                 return [];
 243                         }
 244                         return $contact;
 245                 }
 246
 247                 // Add internal fields
 248                 $removal = [];
 249                 if (!empty($fields)) {
 250                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 251                                 if (!in_array($internal, $fields)) {
 252                                         $fields[] = $internal;
 253                                         $removal[] = $internal;
 254                                 }
 255                         }
 256                 }
 257
 258                 // We first try the nurl (http://server.tld/nick), most common case
 259                 $options = ['order' => ['id']];
 260                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 261
 262                 // Then the addr (nick@server.tld)
 263                 if (!DBA::isResult($contact)) {
 264                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 265                 }
 266
 267                 // Then the alias (which could be anything)
 268                 if (!DBA::isResult($contact)) {
 269                         // The link could be provided as http although we stored it as https
 270                         $ssl_url = str_replace('http://', 'https://', $url);
 271                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 272                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 273                 }
 274
 275                 if (!DBA::isResult($contact)) {
 276                         return [];
 277                 }
 278
 279                 // Update the contact in the background if needed
 280                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 281                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 282                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 283                 }
 284
 285                 // Remove the internal fields
 286                 foreach ($removal as $internal) {
 287                         unset($contact[$internal]);
 288                 }
 289
 290                 return $contact;
 291         }
 292
 293         /**
 294          * Fetches a contact for a given user by a given url.
 295          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 296          *
 297          * @param string  $url    profile url
 298          * @param integer $uid    User ID of the contact
 299          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 300          * @param array   $fields Field list
 301          * @return array contact array
 302          */
 303         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 304         {
 305                 if ($uid != 0) {
 306                         $contact = self::getByURL($url, $update, $fields, $uid);
 307                         if (!empty($contact)) {
 308                                 if (!empty($contact['id'])) {
 309                                         $contact['cid'] = $contact['id'];
 310                                         $contact['zid'] = 0;
 311                                 }
 312                                 return $contact;
 313                         }
 314                 }
 315
 316                 $contact = self::getByURL($url, $update, $fields);
 317                 if (!empty($contact['id'])) {
 318                         $contact['cid'] = 0;
 319                         $contact['zid'] = $contact['id'];
 320                 }
 321                 return $contact;
 322         }
 323
 324         /**
 325          * Tests if the given contact is a follower
 326          *
 327          * @param int $cid Either public contact id or user's contact id
 328          * @param int $uid User ID
 329          *
 330          * @return boolean is the contact id a follower?
 331          * @throws HTTPException\InternalServerErrorException
 332          * @throws \ImagickException
 333          */
 334         public static function isFollower($cid, $uid)
 335         {
 336                 if (Contact\User::isBlocked($cid, $uid)) {
 337                         return false;
 338                 }
 339
 340                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 341                 if (empty($cdata['user'])) {
 342                         return false;
 343                 }
 344
 345                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 346                 return DBA::exists('contact', $condition);
 347         }
 348
 349         /**
 350          * Tests if the given contact url is a follower
 351          *
 352          * @param string $url Contact URL
 353          * @param int    $uid User ID
 354          *
 355          * @return boolean is the contact id a follower?
 356          * @throws HTTPException\InternalServerErrorException
 357          * @throws \ImagickException
 358          */
 359         public static function isFollowerByURL($url, $uid)
 360         {
 361                 $cid = self::getIdForURL($url, $uid);
 362
 363                 if (empty($cid)) {
 364                         return false;
 365                 }
 366
 367                 return self::isFollower($cid, $uid);
 368         }
 369
 370         /**
 371          * Tests if the given user follow the given contact
 372          *
 373          * @param int $cid Either public contact id or user's contact id
 374          * @param int $uid User ID
 375          *
 376          * @return boolean is the contact url being followed?
 377          * @throws HTTPException\InternalServerErrorException
 378          * @throws \ImagickException
 379          */
 380         public static function isSharing($cid, $uid)
 381         {
 382                 if (Contact\User::isBlocked($cid, $uid)) {
 383                         return false;
 384                 }
 385
 386                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 387                 if (empty($cdata['user'])) {
 388                         return false;
 389                 }
 390
 391                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 392                 return DBA::exists('contact', $condition);
 393         }
 394
 395         /**
 396          * Tests if the given user follow the given contact url
 397          *
 398          * @param string $url Contact URL
 399          * @param int    $uid User ID
 400          *
 401          * @return boolean is the contact url being followed?
 402          * @throws HTTPException\InternalServerErrorException
 403          * @throws \ImagickException
 404          */
 405         public static function isSharingByURL($url, $uid)
 406         {
 407                 $cid = self::getIdForURL($url, $uid);
 408
 409                 if (empty($cid)) {
 410                         return false;
 411                 }
 412
 413                 return self::isSharing($cid, $uid);
 414         }
 415
 416         /**
 417          * Get the basepath for a given contact link
 418          *
 419          * @param string $url The contact link
 420          * @param boolean $dont_update Don't update the contact
 421          *
 422          * @return string basepath
 423          * @throws HTTPException\InternalServerErrorException
 424          * @throws \ImagickException
 425          */
 426         public static function getBasepath($url, $dont_update = false)
 427         {
 428                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 429                 if (!DBA::isResult($contact)) {
 430                         return '';
 431                 }
 432
 433                 if (!empty($contact['baseurl'])) {
 434                         return $contact['baseurl'];
 435                 } elseif ($dont_update) {
 436                         return '';
 437                 }
 438
 439                 // Update the existing contact
 440                 self::updateFromProbe($contact['id']);
 441
 442                 // And fetch the result
 443                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 444                 if (empty($contact['baseurl'])) {
 445                         Logger::info('No baseurl for contact', ['url' => $url]);
 446                         return '';
 447                 }
 448
 449                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 450                 return $contact['baseurl'];
 451         }
 452
 453         /**
 454          * Check if the given contact url is on the same server
 455          *
 456          * @param string $url The contact link
 457          *
 458          * @return boolean Is it the same server?
 459          */
 460         public static function isLocal($url)
 461         {
 462                 if (!parse_url($url, PHP_URL_SCHEME)) {
 463                         $addr_parts = explode('@', $url);
 464                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 465                 }
 466
 467                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 468         }
 469
 470         /**
 471          * Check if the given contact ID is on the same server
 472          *
 473          * @param string $url The contact link
 474          *
 475          * @return boolean Is it the same server?
 476          */
 477         public static function isLocalById(int $cid)
 478         {
 479                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 480                 if (!DBA::isResult($contact)) {
 481                         return false;
 482                 }
 483
 484                 if (empty($contact['baseurl'])) {
 485                         $baseurl = self::getBasepath($contact['url'], true);
 486                 } else {
 487                         $baseurl = $contact['baseurl'];
 488                 }
 489
 490                 return Strings::compareLink($baseurl, DI::baseUrl());
 491         }
 492
 493         /**
 494          * Returns the public contact id of the given user id
 495          *
 496          * @param  integer $uid User ID
 497          *
 498          * @return integer|boolean Public contact id for given user id
 499          * @throws \Exception
 500          */
 501         public static function getPublicIdByUserId($uid)
 502         {
 503                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 504                 if (!DBA::isResult($self)) {
 505                         return false;
 506                 }
 507                 return self::getIdForURL($self['url']);
 508         }
 509
 510         /**
 511          * Returns the contact id for the user and the public contact id for a given contact id
 512          *
 513          * @param int $cid Either public contact id or user's contact id
 514          * @param int $uid User ID
 515          *
 516          * @return array with public and user's contact id
 517          * @throws HTTPException\InternalServerErrorException
 518          * @throws \ImagickException
 519          */
 520         public static function getPublicAndUserContactID($cid, $uid)
 521         {
 522                 // We have to use the legacy function as long as the post update hasn't finished
 523                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 524                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 525                 }
 526
 527                 if (empty($uid) || empty($cid)) {
 528                         return [];
 529                 }
 530
 531                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 532                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 533                         return [];
 534                 }
 535
 536                 $pcid = $contact['pid'];
 537                 if ($contact['uid'] == $uid) {
 538                         $ucid = $contact['id'];
 539                 } else {
 540                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 541                         if (DBA::isResult($contact)) {
 542                                 $ucid = $contact['id'];
 543                         } else {
 544                                 $ucid = 0;
 545                         }
 546                 }
 547
 548                 return ['public' => $pcid, 'user' => $ucid];
 549         }
 550
 551         /**
 552          * Helper function for "getPublicAndUserContactID"
 553          *
 554          * @param int $cid Either public contact id or user's contact id
 555          * @param int $uid User ID
 556          *
 557          * @return array with public and user's contact id
 558          * @throws HTTPException\InternalServerErrorException
 559          * @throws \ImagickException
 560          */
 561         private static function legacyGetPublicAndUserContactID($cid, $uid)
 562         {
 563                 if (empty($uid) || empty($cid)) {
 564                         return [];
 565                 }
 566
 567                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 568                 if (!DBA::isResult($contact)) {
 569                         return [];
 570                 }
 571
 572                 // We quit when the user id don't match the user id of the provided contact
 573                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 574                         return [];
 575                 }
 576
 577                 if ($contact['uid'] != 0) {
 578                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 579                         if (empty($pcid)) {
 580                                 return [];
 581                         }
 582                         $ucid = $contact['id'];
 583                 } else {
 584                         $pcid = $contact['id'];
 585                         $ucid = self::getIdForURL($contact['url'], $uid);
 586                 }
 587
 588                 return ['public' => $pcid, 'user' => $ucid];
 589         }
 590
 591         /**
 592          * Returns contact details for a given contact id in combination with a user id
 593          *
 594          * @param int $cid A contact ID
 595          * @param int $uid The User ID
 596          * @param array $fields The selected fields for the contact
 597          *
 598          * @return array The contact details
 599          *
 600          * @throws \Exception
 601          */
 602         public static function getContactForUser($cid, $uid, array $fields = [])
 603         {
 604                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 605
 606                 if (!DBA::isResult($contact)) {
 607                         return [];
 608                 } else {
 609                         return $contact;
 610                 }
 611         }
 612
 613         /**
 614          * Creates the self-contact for the provided user id
 615          *
 616          * @param int $uid
 617          * @return bool Operation success
 618          * @throws HTTPException\InternalServerErrorException
 619          */
 620         public static function createSelfFromUserId($uid)
 621         {
 622                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 623                         ['uid' => $uid, 'account_expired' => false]);
 624                 if (!DBA::isResult($user)) {
 625                         return false;
 626                 }
 627
 628                 $contact = [
 629                         'uid'         => $user['uid'],
 630                         'created'     => DateTimeFormat::utcNow(),
 631                         'self'        => 1,
 632                         'name'        => $user['username'],
 633                         'nick'        => $user['nickname'],
 634                         'pubkey'      => $user['pubkey'],
 635                         'prvkey'      => $user['prvkey'],
 636                         'photo'       => User::getAvatarUrl($user),
 637                         'thumb'       => User::getAvatarUrl($user, Proxy::SIZE_THUMB),
 638                         'micro'       => User::getAvatarUrl($user, Proxy::SIZE_MICRO),
 639                         'blocked'     => 0,
 640                         'pending'     => 0,
 641                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 642                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 643                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 644                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 645                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 646                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 647                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 648                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 649                         'name-date'   => DateTimeFormat::utcNow(),
 650                         'uri-date'    => DateTimeFormat::utcNow(),
 651                         'avatar-date' => DateTimeFormat::utcNow(),
 652                         'closeness'   => 0
 653                 ];
 654
 655                 $return = true;
 656
 657                 // Only create the entry if it doesn't exist yet
 658                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 659                         $return = (bool)self::insert($contact);
 660                 }
 661
 662                 // Create the public contact
 663                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 664                         $contact['self']   = false;
 665                         $contact['uid']    = 0;
 666                         $contact['prvkey'] = null;
 667
 668                         self::insert($contact, Database::INSERT_IGNORE);
 669                 }
 670
 671                 return $return;
 672         }
 673
 674         /**
 675          * Updates the self-contact for the provided user id
 676          *
 677          * @param int     $uid
 678          * @param boolean $update_avatar Force the avatar update
 679          * @return bool   "true" if updated
 680          * @throws HTTPException\InternalServerErrorException
 681          */
 682         public static function updateSelfFromUserID($uid, $update_avatar = false)
 683         {
 684                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey', 'manually-approve',
 685                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 686                         'photo', 'thumb', 'micro', 'header', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 687                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 688                 if (!DBA::isResult($self)) {
 689                         return false;
 690                 }
 691
 692                 $fields = ['uid', 'nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 693                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 694                 if (!DBA::isResult($user)) {
 695                         return false;
 696                 }
 697
 698                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 699                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 700                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 701                 if (!DBA::isResult($profile)) {
 702                         return false;
 703                 }
 704
 705                 $file_suffix = 'jpg';
 706
 707                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 708                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 709                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 710                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 711                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'matrix' => $profile['matrix'], 'network' => Protocol::DFRN];
 712
 713                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 714                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 715                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 716                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 717                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 718                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 719                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 720                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 721                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 722
 723                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 724                 if (DBA::isResult($avatar)) {
 725                         if ($update_avatar) {
 726                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 727                         }
 728
 729                         // Creating the path to the avatar, beginning with the file suffix
 730                         $types = Images::supportedTypes();
 731                         if (isset($types[$avatar['type']])) {
 732                                 $file_suffix = $types[$avatar['type']];
 733                         }
 734
 735                         // We are adding a timestamp value so that other systems won't use cached content
 736                         $timestamp = strtotime($fields['avatar-date']);
 737
 738                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 739                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 740
 741                         $fields['photo'] = $prefix . '4' . $suffix;
 742                         $fields['thumb'] = $prefix . '5' . $suffix;
 743                         $fields['micro'] = $prefix . '6' . $suffix;
 744                 } else {
 745                         // We hadn't found a photo entry, so we use the default avatar
 746                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 747                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 748                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 749                 }
 750
 751                 $fields['avatar'] = User::getAvatarUrl($user);
 752                 $fields['header'] = User::getBannerUrl($user);
 753                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 754                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 755                 $fields['unsearchable'] = !$profile['net-publish'];
 756                 $fields['manually-approve'] = in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
 757
 758                 $update = false;
 759
 760                 foreach ($fields as $field => $content) {
 761                         if ($self[$field] != $content) {
 762                                 $update = true;
 763                         }
 764                 }
 765
 766                 if ($update) {
 767                         if ($fields['name'] != $self['name']) {
 768                                 $fields['name-date'] = DateTimeFormat::utcNow();
 769                         }
 770                         $fields['updated'] = DateTimeFormat::utcNow();
 771                         self::update($fields, ['id' => $self['id']]);
 772
 773                         // Update the public contact as well
 774                         $fields['prvkey'] = null;
 775                         $fields['self']   = false;
 776                         self::update($fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 777
 778                         // Update the profile
 779                         $fields = [
 780                                 'photo' => User::getAvatarUrl($user),
 781                                 'thumb' => User::getAvatarUrl($user, Proxy::SIZE_THUMB)
 782                         ];
 783
 784                         DBA::update('profile', $fields, ['uid' => $uid]);
 785                 }
 786
 787                 return $update;
 788         }
 789
 790         /**
 791          * Marks a contact for removal
 792          *
 793          * @param int $id contact id
 794          * @throws HTTPException\InternalServerErrorException
 795          */
 796         public static function remove($id)
 797         {
 798                 // We want just to make sure that we don't delete our "self" contact
 799                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 800                 if (!DBA::isResult($contact)) {
 801                         return;
 802                 }
 803
 804                 // Archive the contact
 805                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 806
 807                 // Delete it in the background
 808                 Worker::add(PRIORITY_MEDIUM, 'Contact\Remove', $id);
 809         }
 810
 811         /**
 812          * Unfollow the remote contact
 813          *
 814          * @param array $contact Target user-specific contact (uid != 0) array
 815          * @throws HTTPException\InternalServerErrorException
 816          * @throws \ImagickException
 817          */
 818         public static function unfollow(array $contact): void
 819         {
 820                 if (empty($contact['network'])) {
 821                         throw new \InvalidArgumentException('Empty network in contact array');
 822                 }
 823
 824                 if (empty($contact['uid'])) {
 825                         throw new \InvalidArgumentException('Unexpected public contact record');
 826                 }
 827
 828                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 829                         $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 830                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 831                 }
 832
 833                 self::removeSharer($contact);
 834         }
 835
 836         /**
 837          * Revoke follow privileges of the remote user contact
 838          *
 839          * The local relationship is updated immediately, the eventual remote server is messaged in the background.
 840          *
 841          * @param array $contact User-specific contact array (uid != 0) to revoke the follow from
 842          * @throws HTTPException\InternalServerErrorException
 843          * @throws \ImagickException
 844          */
 845         public static function revokeFollow(array $contact): void
 846         {
 847                 if (empty($contact['network'])) {
 848                         throw new \InvalidArgumentException('Empty network in contact array');
 849                 }
 850
 851                 if (empty($contact['uid'])) {
 852                         throw new \InvalidArgumentException('Unexpected public contact record');
 853                 }
 854
 855                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 856                         $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 857                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 858                 }
 859
 860                 self::removeFollower($contact);
 861         }
 862
 863         /**
 864          * Completely severs a relationship with a contact
 865          *
 866          * @param array $contact User-specific contact (uid != 0) array
 867          * @throws HTTPException\InternalServerErrorException
 868          * @throws \ImagickException
 869          */
 870         public static function terminateFriendship(array $contact)
 871         {
 872                 if (empty($contact['network'])) {
 873                         throw new \InvalidArgumentException('Empty network in contact array');
 874                 }
 875
 876                 if (empty($contact['uid'])) {
 877                         throw new \InvalidArgumentException('Unexpected public contact record');
 878                 }
 879
 880                 $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 881
 882                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 883                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 884                 }
 885
 886                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 887                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 888                 }
 889
 890                 self::remove($contact['id']);
 891         }
 892
 893
 894         /**
 895          * Marks a contact for archival after a communication issue delay
 896          *
 897          * Contact has refused to recognise us as a friend. We will start a countdown.
 898          * If they still don't recognise us in 32 days, the relationship is over,
 899          * and we won't waste any more time trying to communicate with them.
 900          * This provides for the possibility that their database is temporarily messed
 901          * up or some other transient event and that there's a possibility we could recover from it.
 902          *
 903          * @param array $contact contact to mark for archival
 904          * @return null
 905          * @throws HTTPException\InternalServerErrorException
 906          */
 907         public static function markForArchival(array $contact)
 908         {
 909                 if (!isset($contact['url']) && !empty($contact['id'])) {
 910                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 911                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 912                         if (!DBA::isResult($contact)) {
 913                                 return;
 914                         }
 915                 } elseif (!isset($contact['url'])) {
 916                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 917                 }
 918
 919                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 920
 921                 // Contact already archived or "self" contact? => nothing to do
 922                 if ($contact['archive'] || $contact['self']) {
 923                         return;
 924                 }
 925
 926                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 927                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 928                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 929                 } else {
 930                         /* @todo
 931                          * We really should send a notification to the owner after 2-3 weeks
 932                          * so they won't be surprised when the contact vanishes and can take
 933                          * remedial action if this was a serious mistake or glitch
 934                          */
 935
 936                         /// @todo Check for contact vitality via probing
 937                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 938
 939                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 940                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 941                                 /* Relationship is really truly dead. archive them rather than
 942                                  * delete, though if the owner tries to unarchive them we'll start
 943                                  * the whole process over again.
 944                                  */
 945                                 self::update(['archive' => true], ['id' => $contact['id']]);
 946                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 947                         }
 948                 }
 949         }
 950
 951         /**
 952          * Cancels the archival countdown
 953          *
 954          * @see   Contact::markForArchival()
 955          *
 956          * @param array $contact contact to be unmarked for archival
 957          * @return null
 958          * @throws \Exception
 959          */
 960         public static function unmarkForArchival(array $contact)
 961         {
 962                 // Always unarchive the relay contact entry
 963                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 964                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 965                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 966                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 967                                 self::update($fields, $condition);
 968                         }
 969                 }
 970
 971                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 972                 $exists = DBA::exists('contact', $condition);
 973
 974                 // We don't need to update, we never marked this contact for archival
 975                 if (!$exists) {
 976                         return;
 977                 }
 978
 979                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 980
 981                 if (!isset($contact['url']) && !empty($contact['id'])) {
 982                         $fields = ['id', 'url', 'batch'];
 983                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 984                         if (!DBA::isResult($contact)) {
 985                                 return;
 986                         }
 987                 }
 988
 989                 // It's a miracle. Our dead contact has inexplicably come back to life.
 990                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 991                 self::update($fields, ['id' => $contact['id']]);
 992                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 993         }
 994
 995         /**
 996          * Returns the data array for the photo menu of a given contact
 997          *
 998          * @param array $contact contact
 999          * @param int   $uid     optional, default 0
1000          * @return array
1001          * @throws HTTPException\InternalServerErrorException
1002          * @throws \ImagickException
1003          */
1004         public static function photoMenu(array $contact, $uid = 0)
1005         {
1006                 $pm_url = '';
1007                 $status_link = '';
1008                 $photos_link = '';
1009                 $poke_link = '';
1010
1011                 if ($uid == 0) {
1012                         $uid = local_user();
1013                 }
1014
1015                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1016                         if ($uid == 0) {
1017                                 $profile_link = self::magicLinkByContact($contact);
1018                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1019
1020                                 return $menu;
1021                         }
1022
1023                         // Look for our own contact if the uid doesn't match and isn't public
1024                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1025                         if (DBA::isResult($contact_own)) {
1026                                 return self::photoMenu($contact_own, $uid);
1027                         }
1028                 }
1029
1030                 $sparkle = false;
1031                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1032                         $sparkle = true;
1033                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1034                 } else {
1035                         $profile_link = $contact['url'];
1036                 }
1037
1038                 if ($profile_link === 'mailbox') {
1039                         $profile_link = '';
1040                 }
1041
1042                 if ($sparkle) {
1043                         $status_link = $profile_link . '/status';
1044                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1045                         $profile_link = $profile_link . '/profile';
1046                 }
1047
1048                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1049                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1050                 }
1051
1052                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1053                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1054                 }
1055
1056                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1057
1058                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1059
1060                 $follow_link = '';
1061                 $unfollow_link = '';
1062                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1063                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1064                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1065                         } elseif(!$contact['pending']) {
1066                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1067                         }
1068                 }
1069
1070                 /**
1071                  * Menu array:
1072                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1073                  */
1074                 if (empty($contact['uid'])) {
1075                         $menu = [
1076                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1077                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1078                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1079                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1080                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1081                         ];
1082                 } else {
1083                         $menu = [
1084                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1085                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1086                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1087                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1088                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1089                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1090                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1091                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1092                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1093                         ];
1094
1095                         if (!empty($contact['pending'])) {
1096                                 try {
1097                                         $intro = DI::intro()->selectForContact($contact['id']);
1098                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1099                                 } catch (IntroductionNotFoundException $exception) {
1100                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1101                                 }
1102                         }
1103                 }
1104
1105                 $args = ['contact' => $contact, 'menu' => &$menu];
1106
1107                 Hook::callAll('contact_photo_menu', $args);
1108
1109                 $menucondensed = [];
1110
1111                 foreach ($menu as $menuname => $menuitem) {
1112                         if ($menuitem[1] != '') {
1113                                 $menucondensed[$menuname] = $menuitem;
1114                         }
1115                 }
1116
1117                 return $menucondensed;
1118         }
1119
1120         /**
1121          * Fetch the contact id for a given URL and user
1122          *
1123          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1124          * `addr` or `alias`.
1125          *
1126          * If there's no record and we aren't looking for a public contact, we quit.
1127          * If there's one, we check that it isn't time to update the picture else we
1128          * directly return the found contact id.
1129          *
1130          * Second, we probe the provided $url whether it's http://server.tld/profile or
1131          * nick@server.tld. We quit if we can't get any info back.
1132          *
1133          * Third, we create the contact record if it doesn't exist
1134          *
1135          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1136          * if there's any updates
1137          *
1138          * @param string  $url       Contact URL
1139          * @param integer $uid       The user id for the contact (0 = public contact)
1140          * @param boolean $update    true = always update, false = never update, null = update when not found
1141          * @param array   $default   Default value for creating the contact when everything else fails
1142          *
1143          * @return integer Contact ID
1144          * @throws HTTPException\InternalServerErrorException
1145          * @throws \ImagickException
1146          */
1147         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1148         {
1149                 $contact_id = 0;
1150
1151                 if ($url == '') {
1152                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1153                         return 0;
1154                 }
1155
1156                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1157
1158                 if (!empty($contact)) {
1159                         $contact_id = $contact["id"];
1160
1161                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1162                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1163                                 return $contact_id;
1164                         }
1165                 } elseif ($uid != 0) {
1166                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1167                         return 0;
1168                 } elseif (empty($default) && !is_null($update) && !$update) {
1169                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1170                         return 0;
1171                 }
1172
1173                 $data = [];
1174
1175                 if (empty($default['network']) || $update) {
1176                         $data = Probe::uri($url, "", $uid);
1177
1178                         // Take the default values when probing failed
1179                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1180                                 $data = array_merge($data, $default);
1181                         }
1182                 } elseif (!empty($default['network'])) {
1183                         $data = $default;
1184                 }
1185
1186                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1187                         // Fetch data for the public contact via the first found personal contact
1188                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1189                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1190                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1191                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1192
1193                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1194                         if (!DBA::isResult($personal_contact)) {
1195                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1196                         }
1197
1198                         if (DBA::isResult($personal_contact)) {
1199                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1200                                 $data = $personal_contact;
1201                                 $data['photo'] = $personal_contact['avatar'];
1202                                 $data['account-type'] = $personal_contact['contact-type'];
1203                                 $data['hide'] = $personal_contact['unsearchable'];
1204                                 unset($data['avatar']);
1205                                 unset($data['contact-type']);
1206                                 unset($data['unsearchable']);
1207                         }
1208                 }
1209
1210                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1211                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1212                         return 0;
1213                 }
1214
1215                 if (!$contact_id) {
1216                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1217                         if (!empty($data['alias'])) {
1218                                 $urls[] = Strings::normaliseLink($data['alias']);
1219                         }
1220                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1221                         if (!empty($contact['id'])) {
1222                                 $contact_id = $contact['id'];
1223                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1224                         }
1225                 }
1226
1227                 if (!$contact_id) {
1228                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1229                         $fields = [
1230                                 'uid'       => $uid,
1231                                 'url'       => $data['url'],
1232                                 'nurl'      => Strings::normaliseLink($data['url']),
1233                                 'network'   => $data['network'],
1234                                 'created'   => DateTimeFormat::utcNow(),
1235                                 'rel'       => self::SHARING,
1236                                 'writable'  => 1,
1237                                 'blocked'   => 0,
1238                                 'readonly'  => 0,
1239                                 'pending'   => 0];
1240
1241                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1242
1243                         // Before inserting we do check if the entry does exist now.
1244                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1245                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1246                                 if (DBA::isResult($contact)) {
1247                                         $contact_id = $contact['id'];
1248                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1249                                 } else {
1250                                         $contact_id = self::insert($fields);
1251                                         if ($contact_id) {
1252                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1253                                         }
1254                                 }
1255                                 DI::lock()->release(self::LOCK_INSERT);
1256                         } else {
1257                                 Logger::warning('Contact lock had not been acquired');
1258                         }
1259
1260                         if (!$contact_id) {
1261                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1262                                 return 0;
1263                         }
1264                 } else {
1265                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1266                 }
1267
1268                 if ($data['network'] == Protocol::DIASPORA) {
1269                         FContact::updateFromProbeArray($data);
1270                 }
1271
1272                 self::updateFromProbeArray($contact_id, $data);
1273
1274                 // Don't return a number for a deleted account
1275                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1276                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1277                         return 0;
1278                 }
1279
1280                 return $contact_id;
1281         }
1282
1283         /**
1284          * Checks if the contact is archived
1285          *
1286          * @param int $cid contact id
1287          *
1288          * @return boolean Is the contact archived?
1289          * @throws HTTPException\InternalServerErrorException
1290          */
1291         public static function isArchived(int $cid)
1292         {
1293                 if ($cid == 0) {
1294                         return false;
1295                 }
1296
1297                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1298                 if (!DBA::isResult($contact)) {
1299                         return false;
1300                 }
1301
1302                 if ($contact['archive']) {
1303                         return true;
1304                 }
1305
1306                 // Check status of ActivityPub endpoints
1307                 $apcontact = APContact::getByURL($contact['url'], false);
1308                 if (!empty($apcontact)) {
1309                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1310                                 return true;
1311                         }
1312
1313                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1314                                 return true;
1315                         }
1316                 }
1317
1318                 // Check status of Diaspora endpoints
1319                 if (!empty($contact['batch'])) {
1320                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1321                         return DBA::exists('contact', $condition);
1322                 }
1323
1324                 return false;
1325         }
1326
1327         /**
1328          * Checks if the contact is blocked
1329          *
1330          * @param int $cid contact id
1331          *
1332          * @return boolean Is the contact blocked?
1333          * @throws HTTPException\InternalServerErrorException
1334          */
1335         public static function isBlocked($cid)
1336         {
1337                 if ($cid == 0) {
1338                         return false;
1339                 }
1340
1341                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1342                 if (!DBA::isResult($blocked)) {
1343                         return false;
1344                 }
1345
1346                 if (Network::isUrlBlocked($blocked['url'])) {
1347                         return true;
1348                 }
1349
1350                 return (bool) $blocked['blocked'];
1351         }
1352
1353         /**
1354          * Checks if the contact is hidden
1355          *
1356          * @param int $cid contact id
1357          *
1358          * @return boolean Is the contact hidden?
1359          * @throws \Exception
1360          */
1361         public static function isHidden($cid)
1362         {
1363                 if ($cid == 0) {
1364                         return false;
1365                 }
1366
1367                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1368                 if (!DBA::isResult($hidden)) {
1369                         return false;
1370                 }
1371                 return (bool) $hidden['hidden'];
1372         }
1373
1374         /**
1375          * Returns posts from a given contact url
1376          *
1377          * @param string $contact_url Contact URL
1378          * @param bool   $thread_mode
1379          * @param int    $update      Update mode
1380          * @param int    $parent      Item parent ID for the update mode
1381          * @param bool   $only_media  Only display media content
1382          * @return string posts in HTML
1383          * @throws \Exception
1384          */
1385         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1386         {
1387                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1388         }
1389
1390         /**
1391          * Returns posts from a given contact id
1392          *
1393          * @param int  $cid         Contact ID
1394          * @param bool $thread_mode
1395          * @param int  $update      Update mode
1396          * @param int  $parent      Item parent ID for the update mode
1397          * @param bool $only_media  Only display media content
1398          * @return string posts in HTML
1399          * @throws \Exception
1400          */
1401         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1402         {
1403                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1404                 if (!DBA::isResult($contact)) {
1405                         return '';
1406                 }
1407
1408                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1409                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1410                 } else {
1411                         $sql = "`uid` = ?";
1412                 }
1413
1414                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1415
1416                 if ($thread_mode) {
1417                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1418                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1419                 } else {
1420                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1421                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1422                 }
1423
1424                 if (!empty($parent)) {
1425                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1426                 } else {
1427                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1428                         if (!empty($last_received)) {
1429                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1430                         }
1431                 }
1432
1433                 if ($only_media) {
1434                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1435                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1436                 }
1437
1438                 if (DI::mode()->isMobile()) {
1439                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1440                                 DI::config()->get('system', 'itemspage_network_mobile'));
1441                 } else {
1442                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1443                                 DI::config()->get('system', 'itemspage_network'));
1444                 }
1445
1446                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1447
1448                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1449
1450                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1451                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1452                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1453                 } else {
1454                         $o = '';
1455                 }
1456
1457                 if ($thread_mode) {
1458                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1459
1460                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'commented', local_user());
1461                 } else {
1462                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1463
1464                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1465                 }
1466
1467                 if (!$update) {
1468                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1469                                 $o .= HTML::scrollLoader();
1470                         } else {
1471                                 $o .= $pager->renderMinimal(count($items));
1472                         }
1473                 }
1474
1475                 return $o;
1476         }
1477
1478         /**
1479          * Returns the account type name
1480          *
1481          * The function can be called with either the user or the contact array
1482          *
1483          * @param int $type type of contact or account
1484          * @return string
1485          */
1486         public static function getAccountType(int $type)
1487         {
1488                 switch ($type) {
1489                         case self::TYPE_ORGANISATION:
1490                                 $account_type = DI::l10n()->t("Organisation");
1491                                 break;
1492
1493                         case self::TYPE_NEWS:
1494                                 $account_type = DI::l10n()->t('News');
1495                                 break;
1496
1497                         case self::TYPE_COMMUNITY:
1498                                 $account_type = DI::l10n()->t("Forum");
1499                                 break;
1500
1501                         default:
1502                                 $account_type = "";
1503                                 break;
1504                 }
1505
1506                 return $account_type;
1507         }
1508
1509         /**
1510          * Blocks a contact
1511          *
1512          * @param int $cid
1513          * @return bool
1514          * @throws \Exception
1515          */
1516         public static function block($cid, $reason = null)
1517         {
1518                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1519
1520                 return $return;
1521         }
1522
1523         /**
1524          * Unblocks a contact
1525          *
1526          * @param int $cid
1527          * @return bool
1528          * @throws \Exception
1529          */
1530         public static function unblock($cid)
1531         {
1532                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1533
1534                 return $return;
1535         }
1536
1537         /**
1538          * Ensure that cached avatar exist
1539          *
1540          * @param integer $cid
1541          */
1542         public static function checkAvatarCache(int $cid)
1543         {
1544                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1545                 if (!DBA::isResult($contact)) {
1546                         return;
1547                 }
1548
1549                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1550                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1551                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1552                                 self::updateAvatar($cid, $contact['avatar'], true);
1553                                 return;
1554                         }
1555                 } elseif (!empty($contact['photo']) || !empty($contact['thumb']) || !empty($contact['micro'])) {
1556                         Logger::info('Removing avatar cache', ['id' => $cid, 'contact' => $contact]);
1557                         self::updateAvatar($cid, $contact['avatar'], true);
1558                         return;
1559                 }
1560         }
1561
1562         /**
1563          * Return the photo path for a given contact array in the given size
1564          *
1565          * @param array $contact    contact array
1566          * @param string $field     Fieldname of the photo in the contact array
1567          * @param string $size      Size of the avatar picture
1568          * @param string $avatar    Avatar path that is displayed when no photo had been found
1569          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1570          * @return string photo path
1571          */
1572         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1573         {
1574                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1575                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1576         }
1577
1578         /**
1579          * Return the photo path for a given contact array
1580          *
1581          * @param array  $contact   Contact array
1582          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1583          * @return string photo path
1584          */
1585         public static function getPhoto(array $contact, bool $no_update = false)
1586         {
1587                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1588         }
1589
1590         /**
1591          * Return the photo path (thumb size) for a given contact array
1592          *
1593          * @param array  $contact   Contact array
1594          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1595          * @return string photo path
1596          */
1597         public static function getThumb(array $contact, bool $no_update = false)
1598         {
1599                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1600         }
1601
1602         /**
1603          * Return the photo path (micro size) for a given contact array
1604          *
1605          * @param array  $contact   Contact array
1606          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1607          * @return string photo path
1608          */
1609         public static function getMicro(array $contact, bool $no_update = false)
1610         {
1611                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1612         }
1613
1614         /**
1615          * Check the given contact array for avatar cache fields
1616          *
1617          * @param array $contact
1618          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1619          * @return array contact array with avatar cache fields
1620          */
1621         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1622         {
1623                 $update = false;
1624                 $contact_fields = [];
1625                 $fields = ['photo', 'thumb', 'micro'];
1626                 foreach ($fields as $field) {
1627                         if (isset($contact[$field])) {
1628                                 $contact_fields[] = $field;
1629                         }
1630                         if (isset($contact[$field]) && empty($contact[$field])) {
1631                                 $update = true;
1632                         }
1633                 }
1634
1635                 if (!$update || $no_update) {
1636                         return $contact;
1637                 }
1638
1639                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1640                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1641
1642                         $new_contact = self::getById($contact['id'], $contact_fields);
1643                         if (DBA::isResult($new_contact)) {
1644                                 // We only update the cache fields
1645                                 $contact = array_merge($contact, $new_contact);
1646                         }
1647                 }
1648
1649                 /// add the default avatars if the fields aren't filled
1650                 if (isset($contact['photo']) && empty($contact['photo'])) {
1651                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1652                 }
1653                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1654                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1655                 }
1656                 if (isset($contact['micro']) && empty($contact['micro'])) {
1657                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1658                 }
1659
1660                 return $contact;
1661         }
1662
1663         /**
1664          * Fetch the default header for the given contact
1665          *
1666          * @param array $contact  contact array
1667          * @return string avatar URL
1668          */
1669         public static function getDefaultHeader(array $contact): string
1670         {
1671                 if (!empty($contact['header'])) {
1672                         return $contact['header'];
1673                 }
1674
1675                 if (!empty($contact['gsid'])) {
1676                         // Use default banners for certain platforms
1677                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1678                         $platform = strtolower($gserver['platform'] ?? '');
1679                 } else {
1680                         $platform = '';
1681                 }
1682
1683                 switch ($platform) {
1684                         case 'friendica':
1685                         case 'friendika':
1686                                 /**
1687                                  * Picture credits
1688                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1689                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1690                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1691                                  */
1692                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1693                                 break;
1694                         case 'diaspora':
1695                                 /**
1696                                  * Picture credits
1697                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1698                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1699                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1700                                  */
1701                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1702                                 break;
1703                         default:
1704                                 /**
1705                                  * Use a random picture.
1706                                  * The service provides random pictures from Unsplash.
1707                                  * @license https://unsplash.com/license
1708                                  */
1709                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1710                                 break;
1711                 }
1712
1713                 return $header;
1714         }
1715
1716         /**
1717          * Fetch the default avatar for the given contact and size
1718          *
1719          * @param array $contact  contact array
1720          * @param string $size    Size of the avatar picture
1721          * @return string avatar URL
1722          */
1723         public static function getDefaultAvatar(array $contact, string $size)
1724         {
1725                 switch ($size) {
1726                         case Proxy::SIZE_MICRO:
1727                                 $avatar['size'] = 48;
1728                                 $default = self::DEFAULT_AVATAR_MICRO;
1729                                 break;
1730
1731                         case Proxy::SIZE_THUMB:
1732                                 $avatar['size'] = 80;
1733                                 $default = self::DEFAULT_AVATAR_THUMB;
1734                                 break;
1735
1736                         case Proxy::SIZE_SMALL:
1737                         default:
1738                                 $avatar['size'] = 300;
1739                                 $default = self::DEFAULT_AVATAR_PHOTO;
1740                                 break;
1741                 }
1742
1743                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1744                         return DI::baseUrl() . $default;
1745                 }
1746
1747                 if (!empty($contact['xmpp'])) {
1748                         $avatar['email'] = $contact['xmpp'];
1749                 } elseif (!empty($contact['addr'])) {
1750                         $avatar['email'] = $contact['addr'];
1751                 } elseif (!empty($contact['url'])) {
1752                         $avatar['email'] = $contact['url'];
1753                 } else {
1754                         return DI::baseUrl() . $default;
1755                 }
1756
1757                 $avatar['url'] = '';
1758                 $avatar['success'] = false;
1759
1760                 Hook::callAll('avatar_lookup', $avatar);
1761
1762                 if ($avatar['success'] && !empty($avatar['url'])) {
1763                         return $avatar['url'];
1764                 }
1765
1766                 return DI::baseUrl() . $default;
1767         }
1768
1769         /**
1770          * Get avatar link for given contact id
1771          *
1772          * @param integer $cid     contact id
1773          * @param string  $size    One of the Proxy::SIZE_* constants
1774          * @param string  $updated Contact update date
1775          * @return string avatar link
1776          */
1777         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1778         {
1779                 // We have to fetch the "updated" variable when it wasn't provided
1780                 // The parameter can be provided to improve performance
1781                 if (empty($updated) || empty($guid)) {
1782                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1783                         $updated = $account['updated'] ?? '';
1784                         $guid = $account['guid'] ?? '';
1785                 }
1786
1787                 $guid = urlencode($guid);
1788
1789                 $url = DI::baseUrl() . '/photo/contact/';
1790                 switch ($size) {
1791                         case Proxy::SIZE_MICRO:
1792                                 $url .= Proxy::PIXEL_MICRO . '/';
1793                                 break;
1794                         case Proxy::SIZE_THUMB:
1795                                 $url .= Proxy::PIXEL_THUMB . '/';
1796                                 break;
1797                         case Proxy::SIZE_SMALL:
1798                                 $url .= Proxy::PIXEL_SMALL . '/';
1799                                 break;
1800                         case Proxy::SIZE_MEDIUM:
1801                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1802                                 break;
1803                         case Proxy::SIZE_LARGE:
1804                                 $url .= Proxy::PIXEL_LARGE . '/';
1805                                 break;
1806                 }
1807                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1808         }
1809
1810         /**
1811          * Get avatar link for given contact URL
1812          *
1813          * @param string  $url  contact url
1814          * @param integer $uid  user id
1815          * @param string  $size One of the Proxy::SIZE_* constants
1816          * @return string avatar link
1817          */
1818         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1819         {
1820                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1821                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1822                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1823                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1824         }
1825
1826         /**
1827          * Get header link for given contact id
1828          *
1829          * @param integer $cid     contact id
1830          * @param string  $size    One of the Proxy::SIZE_* constants
1831          * @param string  $updated Contact update date
1832          * @return string header link
1833          */
1834         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1835         {
1836                 // We have to fetch the "updated" variable when it wasn't provided
1837                 // The parameter can be provided to improve performance
1838                 if (empty($updated) || empty($guid)) {
1839                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1840                         $updated = $account['updated'] ?? '';
1841                         $guid = $account['guid'] ?? '';
1842                 }
1843
1844                 $guid = urlencode($guid);
1845
1846                 $url = DI::baseUrl() . '/photo/header/';
1847                 switch ($size) {
1848                         case Proxy::SIZE_MICRO:
1849                                 $url .= Proxy::PIXEL_MICRO . '/';
1850                                 break;
1851                         case Proxy::SIZE_THUMB:
1852                                 $url .= Proxy::PIXEL_THUMB . '/';
1853                                 break;
1854                         case Proxy::SIZE_SMALL:
1855                                 $url .= Proxy::PIXEL_SMALL . '/';
1856                                 break;
1857                         case Proxy::SIZE_MEDIUM:
1858                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1859                                 break;
1860                         case Proxy::SIZE_LARGE:
1861                                 $url .= Proxy::PIXEL_LARGE . '/';
1862                                 break;
1863                 }
1864
1865                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1866         }
1867
1868         /**
1869          * Updates the avatar links in a contact only if needed
1870          *
1871          * @param int    $cid          Contact id
1872          * @param string $avatar       Link to avatar picture
1873          * @param bool   $force        force picture update
1874          * @param bool   $create_cache Enforces the creation of cached avatar fields
1875          *
1876          * @return void
1877          * @throws HTTPException\InternalServerErrorException
1878          * @throws HTTPException\NotFoundException
1879          * @throws \ImagickException
1880          */
1881         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1882         {
1883                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1884                         ['id' => $cid, 'self' => false]);
1885                 if (!DBA::isResult($contact)) {
1886                         return;
1887                 }
1888
1889                 $uid = $contact['uid'];
1890
1891                 // Only update the cached photo links of public contacts when they already are cached
1892                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1893                         if ($contact['avatar'] != $avatar) {
1894                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1895                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1896                         }
1897                         return;
1898                 }
1899
1900                 // User contacts use are updated through the public contacts
1901                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1902                         $pcid = self::getIdForURL($contact['url'], 0, false);
1903                         if (!empty($pcid)) {
1904                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1905                                 self::updateAvatar($pcid, $avatar, $force, true);
1906                                 return;
1907                         }
1908                 }
1909
1910                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1911
1912                 if ($default_avatar) {
1913                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1914                 }
1915
1916                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
1917
1918                 // Local contact avatars don't need to be cached
1919                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
1920                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
1921                 }
1922
1923                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
1924                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
1925                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1926                                         'photo' => $avatar,
1927                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1928                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1929                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1930                         }
1931
1932                         // Use the data from the self account
1933                         if (empty($fields)) {
1934                                 $local_uid = User::getIdForURL($contact['url']);
1935                                 if (!empty($local_uid)) {
1936                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1937                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1938                                 }
1939                         }
1940
1941                         if (empty($fields)) {
1942                                 $update = ($contact['avatar'] != $avatar) || $force;
1943
1944                                 if (!$update) {
1945                                         $data = [
1946                                                 $contact['photo'] ?? '',
1947                                                 $contact['thumb'] ?? '',
1948                                                 $contact['micro'] ?? '',
1949                                         ];
1950
1951                                         foreach ($data as $image_uri) {
1952                                                 $image_rid = Photo::ridFromURI($image_uri);
1953                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1954                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1955                                                         $update = true;
1956                                                 }
1957                                         }
1958                                 }
1959
1960                                 if ($update) {
1961                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1962                                         if ($photos) {
1963                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1964                                                 $update = !empty($fields);
1965                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1966                                         } else {
1967                                                 $update = false;
1968                                         }
1969                                 }
1970                         } else {
1971                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1972                         }
1973                 } else {
1974                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
1975                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1976                                 'photo' => '', 'thumb' => '', 'micro' => ''];
1977                         $update = ($avatar != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1978                 }
1979
1980                 if (!$update) {
1981                         return;
1982                 }
1983
1984                 $cids = [];
1985                 $uids = [];
1986                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1987                         // Collect all user contacts of the given public contact
1988                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1989                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1990                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1991                                 $cids[] = $personal_contact['id'];
1992                                 $uids[] = $personal_contact['uid'];
1993                         }
1994                         DBA::close($personal_contacts);
1995
1996                         if (!empty($cids)) {
1997                                 // Delete possibly existing cached user contact avatars
1998                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
1999                         }
2000                 }
2001
2002                 $cids[] = $cid;
2003                 $uids[] = $uid;
2004                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2005                 self::update($fields, ['id' => $cids]);
2006         }
2007
2008         public static function deleteContactByUrl(string $url)
2009         {
2010                 // Update contact data for all users
2011                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2012                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2013                 while ($contact = DBA::fetch($contacts)) {
2014                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2015                         self::remove($contact['id']);
2016                 }
2017         }
2018
2019         /**
2020          * Helper function for "updateFromProbe". Updates personal and public contact
2021          *
2022          * @param integer $id      contact id
2023          * @param integer $uid     user id
2024          * @param string  $old_url The previous profile URL of the contact
2025          * @param string  $new_url The profile URL of the contact
2026          * @param array   $fields  The fields that are updated
2027          *
2028          * @throws \Exception
2029          */
2030         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
2031         {
2032                 if (!self::update($fields, ['id' => $id])) {
2033                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2034                         return;
2035                 }
2036
2037                 // Search for duplicated contacts and get rid of them
2038                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
2039                         return;
2040                 }
2041
2042                 // Archive or unarchive the contact.
2043                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2044                 if (!DBA::isResult($contact)) {
2045                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2046                         return;
2047                 }
2048
2049                 if (isset($fields['failed'])) {
2050                         if ($fields['failed']) {
2051                                 self::markForArchival($contact);
2052                         } else {
2053                                 self::unmarkForArchival($contact);
2054                         }
2055                 }
2056
2057                 if ($contact['uid'] != 0) {
2058                         return;
2059                 }
2060
2061                 // Update contact data for all users
2062                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
2063
2064                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2065                 self::update($fields, $condition);
2066
2067                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2068                 $condition['network'] = Protocol::OSTATUS;
2069
2070                 // If the contact failed, propagate the update fields to all contacts
2071                 if (empty($fields['failed'])) {
2072                         unset($fields['last-update']);
2073                         unset($fields['success_update']);
2074                         unset($fields['failure_update']);
2075                 }
2076
2077                 if (empty($fields)) {
2078                         return;
2079                 }
2080
2081                 self::update($fields, $condition);
2082         }
2083
2084         /**
2085          * Remove duplicated contacts
2086          *
2087          * @param string  $nurl  Normalised contact url
2088          * @param integer $uid   User id
2089          * @return boolean
2090          * @throws \Exception
2091          */
2092         public static function removeDuplicates(string $nurl, int $uid)
2093         {
2094                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2095                 $count = DBA::count('contact', $condition);
2096                 if ($count <= 1) {
2097                         return false;
2098                 }
2099
2100                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2101                 if (!DBA::isResult($first_contact)) {
2102                         // Shouldn't happen - so we handle it
2103                         return false;
2104                 }
2105
2106                 $first = $first_contact['id'];
2107                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2108                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2109                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2110                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2111                         return false;
2112                 }
2113
2114                 // Find all duplicates
2115                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2116                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2117                 while ($duplicate = DBA::fetch($duplicates)) {
2118                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2119                                 continue;
2120                         }
2121
2122                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2123                 }
2124                 DBA::close($duplicates);
2125                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2126                 return true;
2127         }
2128
2129         /**
2130          * @param integer $id      contact id
2131          * @param string  $network Optional network we are probing for
2132          * @return boolean
2133          * @throws HTTPException\InternalServerErrorException
2134          * @throws \ImagickException
2135          */
2136         public static function updateFromProbe(int $id, string $network = '')
2137         {
2138                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2139                 if (!DBA::isResult($contact)) {
2140                         return false;
2141                 }
2142
2143                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2144
2145                 if ($ret['network'] == Protocol::DIASPORA) {
2146                         FContact::updateFromProbeArray($ret);
2147                 }
2148
2149                 return self::updateFromProbeArray($id, $ret);
2150         }
2151
2152         /**
2153          * @param integer $id      contact id
2154          * @param array   $ret     Probed data
2155          * @return boolean
2156          * @throws HTTPException\InternalServerErrorException
2157          * @throws \ImagickException
2158          */
2159         private static function updateFromProbeArray(int $id, array $ret)
2160         {
2161                 /*
2162                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2163                   This will reliably kill your communication with old Friendica contacts.
2164                  */
2165
2166                 // These fields aren't updated by this routine:
2167                 // 'sensitive'
2168
2169                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2170                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2171                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2172                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2173                 if (!DBA::isResult($contact)) {
2174                         return false;
2175                 }
2176
2177                 if (self::isLocal($ret['url'])) {
2178                         if ($contact['uid'] == 0) {
2179                                 Logger::info('Local contacts are not updated here.');
2180                         } else {
2181                                 self::updateFromPublicContact($id, $contact);
2182                         }
2183                         return true;
2184                 }
2185
2186                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2187                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2188                         self::remove($id);
2189
2190                         // Delete all contacts with the same URL
2191                         self::deleteContactByUrl($ret['url']);
2192                         return true;
2193                 }
2194
2195                 $uid = $contact['uid'];
2196                 unset($contact['uid']);
2197
2198                 $uriid = $contact['uri-id'];
2199                 unset($contact['uri-id']);
2200
2201                 $pubkey = $contact['pubkey'];
2202                 unset($contact['pubkey']);
2203
2204                 $contact['photo'] = $contact['avatar'];
2205                 unset($contact['avatar']);
2206
2207                 $updated = DateTimeFormat::utcNow();
2208
2209                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2210                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2211                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2212                         return false;
2213                 }
2214
2215                 // We must not try to update relay contacts via probe. They are no real contacts.
2216                 // We check after the probing to be able to correct falsely detected contact types.
2217                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2218                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2219                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2220                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2221                         return true;
2222                 }
2223
2224                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2225                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2226                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2227                         return false;
2228                 }
2229
2230                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2231                         $cid = self::getIdForURL($ret['url'], 0, false);
2232                         if (!empty($cid) && ($cid != $id)) {
2233                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2234                                 return self::updateFromProbeArray($cid, $ret);
2235                         }
2236                 }
2237
2238                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2239                         $ret['unsearchable'] = $ret['hide'];
2240                 }
2241
2242                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2243                         $ret['forum'] = false;
2244                         $ret['prv'] = false;
2245                         $ret['contact-type'] = $ret['account-type'];
2246                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2247                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2248                                 $ret['prv'] = (bool)!$ret['forum'];
2249                         }
2250                 }
2251
2252                 $new_pubkey = $ret['pubkey'] ?? '';
2253
2254                 if ($uid == 0) {
2255                         $ret['last-item'] = Probe::getLastUpdate($ret);
2256                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2257                 }
2258
2259                 $update = false;
2260                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2261
2262                 // make sure to not overwrite existing values with blank entries except some technical fields
2263                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2264                 foreach ($ret as $key => $val) {
2265                         if (!array_key_exists($key, $contact)) {
2266                                 unset($ret[$key]);
2267                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2268                                 $ret[$key] = $contact[$key];
2269                         } elseif ($ret[$key] != $contact[$key]) {
2270                                 $update = true;
2271                         }
2272                 }
2273
2274                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2275                         $update = true;
2276                 } else {
2277                         unset($ret['last-item']);
2278                 }
2279
2280                 if (empty($uriid)) {
2281                         $update = true;
2282                 }
2283
2284                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2285                         self::updateAvatar($id, $ret['photo'], $update);
2286                 }
2287
2288                 $uriid = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2289
2290                 if (!$update) {
2291                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2292
2293                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2294                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2295                         }
2296
2297                         // Update the public contact
2298                         if ($uid != 0) {
2299                                 $contact = self::getByURL($ret['url'], false, ['id']);
2300                                 if (!empty($contact['id'])) {
2301                                         self::updateFromProbeArray($contact['id'], $ret);
2302                                 }
2303                         }
2304
2305                         return true;
2306                 }
2307
2308                 $ret['uri-id']  = $uriid;
2309                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2310                 $ret['updated'] = $updated;
2311                 $ret['failed']  = false;
2312
2313                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2314                 if (empty($pubkey) && !empty($new_pubkey)) {
2315                         $ret['pubkey'] = $new_pubkey;
2316                 }
2317
2318                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2319                         $ret['uri-date'] = $updated;
2320                 }
2321
2322                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2323                         $ret['name-date'] = $updated;
2324                 }
2325
2326                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2327                         $ret['last-update'] = $updated;
2328                         $ret['success_update'] = $updated;
2329                 }
2330
2331                 unset($ret['photo']);
2332
2333                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2334
2335                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2336                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2337                 }
2338
2339                 return true;
2340         }
2341
2342         private static function updateFromPublicContact(int $id, array $contact)
2343         {
2344                 $public = self::getByURL($contact['url'], false);
2345
2346                 $fields = [];
2347
2348                 foreach ($contact as $field => $value) {
2349                         if ($field == 'uid') {
2350                                 continue;
2351                         }
2352                         if ($public[$field] != $value) {
2353                                 $fields[$field] = $public[$field];
2354                         }
2355                 }
2356                 if (!empty($fields)) {
2357                         self::update($fields, ['id' => $id, 'self' => false]);
2358                         Logger::info('Updating local contact', ['id' => $id]);
2359                 }
2360         }
2361
2362         /**
2363          * @param integer $url contact url
2364          * @return integer Contact id
2365          * @throws HTTPException\InternalServerErrorException
2366          * @throws \ImagickException
2367          */
2368         public static function updateFromProbeByURL($url)
2369         {
2370                 $id = self::getIdForURL($url);
2371
2372                 if (empty($id)) {
2373                         return $id;
2374                 }
2375
2376                 self::updateFromProbe($id);
2377
2378                 return $id;
2379         }
2380
2381         /**
2382          * Detects the communication protocol for a given contact url.
2383          * This is used to detect Friendica contacts that we can communicate via AP.
2384          *
2385          * @param string $url contact url
2386          * @param string $network Network of that contact
2387          * @return string with protocol
2388          */
2389         public static function getProtocol($url, $network)
2390         {
2391                 if ($network != Protocol::DFRN) {
2392                         return $network;
2393                 }
2394
2395                 $apcontact = APContact::getByURL($url);
2396                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2397                         return Protocol::ACTIVITYPUB;
2398                 } else {
2399                         return $network;
2400                 }
2401         }
2402
2403         /**
2404          * Takes a $uid and a url/handle and adds a new contact
2405          *
2406          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2407          * dfrn_request page.
2408          *
2409          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2410          *
2411          * Returns an array
2412          * $return['success'] boolean true if successful
2413          * $return['message'] error text if success is false.
2414          *
2415          * Takes a $uid and a url/handle and adds a new contact
2416          *
2417          * @param int    $uid         The user id the contact should be created for
2418          * @param string $url         The profile URL of the contact
2419          * @param string $network
2420          * @return array
2421          * @throws HTTPException\InternalServerErrorException
2422          * @throws HTTPException\NotFoundException
2423          * @throws \ImagickException
2424          */
2425         public static function createFromProbeForUser(int $uid, $url, $network = '')
2426         {
2427                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2428
2429                 // remove ajax junk, e.g. Twitter
2430                 $url = str_replace('/#!/', '/', $url);
2431
2432                 if (!Network::isUrlAllowed($url)) {
2433                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2434                         return $result;
2435                 }
2436
2437                 if (Network::isUrlBlocked($url)) {
2438                         $result['message'] = DI::l10n()->t('Blocked domain');
2439                         return $result;
2440                 }
2441
2442                 if (!$url) {
2443                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2444                         return $result;
2445                 }
2446
2447                 $arr = ['url' => $url, 'contact' => []];
2448
2449                 Hook::callAll('follow', $arr);
2450
2451                 if (empty($arr)) {
2452                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2453                         return $result;
2454                 }
2455
2456                 if (!empty($arr['contact']['name'])) {
2457                         $probed = false;
2458                         $ret = $arr['contact'];
2459                 } else {
2460                         $probed = true;
2461                         $ret = Probe::uri($url, $network, $uid);
2462                 }
2463
2464                 if (($network != '') && ($ret['network'] != $network)) {
2465                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2466                         return $result;
2467                 }
2468
2469                 // check if we already have a contact
2470                 // the poll url is more reliable than the profile url, as we may have
2471                 // indirect links or webfinger links
2472
2473                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2474                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2475                 if (!DBA::isResult($contact)) {
2476                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2477                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2478                 }
2479
2480                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2481
2482                 // This extra param just confuses things, remove it
2483                 if ($protocol === Protocol::DIASPORA) {
2484                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2485                 }
2486
2487                 // do we have enough information?
2488                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2489                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2490                         if (empty($ret['poll'])) {
2491                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2492                         }
2493                         if (empty($ret['name'])) {
2494                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2495                         }
2496                         if (empty($ret['url'])) {
2497                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2498                         }
2499                         if (strpos($ret['url'], '@') !== false) {
2500                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2501                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2502                         }
2503                         return $result;
2504                 }
2505
2506                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2507                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2508                         $ret['notify'] = '';
2509                 }
2510
2511                 if (!$ret['notify']) {
2512                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2513                 }
2514
2515                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2516
2517                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2518
2519                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2520
2521                 $pending = false;
2522                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2523                         $pending = (bool)$ret['manually-approve'];
2524                 }
2525
2526                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2527                         $writeable = 1;
2528                 }
2529
2530                 if (DBA::isResult($contact)) {
2531                         // update contact
2532                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2533
2534                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2535                         self::update($fields, ['id' => $contact['id']]);
2536                 } else {
2537                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2538
2539                         // create contact record
2540                         self::insert([
2541                                 'uid'     => $uid,
2542                                 'created' => DateTimeFormat::utcNow(),
2543                                 'url'     => $ret['url'],
2544                                 'nurl'    => Strings::normaliseLink($ret['url']),
2545                                 'addr'    => $ret['addr'],
2546                                 'alias'   => $ret['alias'],
2547                                 'batch'   => $ret['batch'],
2548                                 'notify'  => $ret['notify'],
2549                                 'poll'    => $ret['poll'],
2550                                 'poco'    => $ret['poco'],
2551                                 'name'    => $ret['name'],
2552                                 'nick'    => $ret['nick'],
2553                                 'network' => $ret['network'],
2554                                 'baseurl' => $ret['baseurl'],
2555                                 'gsid'    => $ret['gsid'] ?? null,
2556                                 'protocol' => $protocol,
2557                                 'pubkey'  => $ret['pubkey'],
2558                                 'rel'     => $new_relation,
2559                                 'priority'=> $ret['priority'],
2560                                 'writable'=> $writeable,
2561                                 'hidden'  => $hidden,
2562                                 'blocked' => 0,
2563                                 'readonly'=> 0,
2564                                 'pending' => $pending,
2565                                 'subhub'  => $subhub
2566                         ]);
2567                 }
2568
2569                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2570                 if (!DBA::isResult($contact)) {
2571                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2572                         return $result;
2573                 }
2574
2575                 $contact_id = $contact['id'];
2576                 $result['cid'] = $contact_id;
2577
2578                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
2579
2580                 // Update the avatar
2581                 self::updateAvatar($contact_id, $ret['photo']);
2582
2583                 // pull feed and consume it, which should subscribe to the hub.
2584                 if ($contact['network'] == Protocol::OSTATUS) {
2585                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2586                 }
2587
2588                 if ($probed) {
2589                         self::updateFromProbeArray($contact_id, $ret);
2590                 } else {
2591                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2592                 }
2593
2594                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
2595
2596                 return $result;
2597         }
2598
2599         /**
2600          * @param array  $importer Owner (local user) data
2601          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2602          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2603          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2604          * @param string $note     Introduction additional message
2605          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2606          * @throws HTTPException\InternalServerErrorException
2607          * @throws \ImagickException
2608          */
2609         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2610         {
2611                 // Should always be set
2612                 if (empty($datarray['author-id'])) {
2613                         return false;
2614                 }
2615
2616                 $fields = ['id', 'url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2617                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2618                 if (!DBA::isResult($pub_contact)) {
2619                         // Should never happen
2620                         return false;
2621                 }
2622
2623                 // Contact is blocked at node-level
2624                 if (self::isBlocked($datarray['author-id'])) {
2625                         return false;
2626                 }
2627
2628                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2629                 $name = $pub_contact['name'];
2630                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2631                 $nick = $pub_contact['nick'];
2632                 $network = $pub_contact['network'];
2633
2634                 // Ensure that we don't create a new contact when there already is one
2635                 $cid = self::getIdForURL($url, $importer['uid']);
2636                 if (!empty($cid)) {
2637                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2638                 }
2639
2640                 if (!empty($contact)) {
2641                         if (!empty($contact['pending'])) {
2642                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2643                                 return null;
2644                         }
2645
2646                         // Contact is blocked at user-level
2647                         if (!empty($contact['id']) && !empty($importer['id']) &&
2648                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2649                                 return false;
2650                         }
2651
2652                         // Make sure that the existing contact isn't archived
2653                         self::unmarkForArchival($contact);
2654
2655                         if (($contact['rel'] == self::SHARING)
2656                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2657                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2658                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2659                         }
2660
2661                         // Ensure to always have the correct network type, independent from the connection request method
2662                         self::updateFromProbe($contact['id']);
2663
2664                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
2665
2666                         return true;
2667                 } else {
2668                         // send email notification to owner?
2669                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2670                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
2671                                 return null;
2672                         }
2673
2674                         // create contact record
2675                         $contact_id = self::insert([
2676                                 'uid'      => $importer['uid'],
2677                                 'created'  => DateTimeFormat::utcNow(),
2678                                 'url'      => $url,
2679                                 'nurl'     => Strings::normaliseLink($url),
2680                                 'name'     => $name,
2681                                 'nick'     => $nick,
2682                                 'network'  => $network,
2683                                 'rel'      => self::FOLLOWER,
2684                                 'blocked'  => 0,
2685                                 'readonly' => 0,
2686                                 'pending'  => 1,
2687                                 'writable' => 1,
2688                         ]);
2689
2690                         // Ensure to always have the correct network type, independent from the connection request method
2691                         self::updateFromProbe($contact_id);
2692
2693                         self::updateAvatar($contact_id, $photo, true);
2694
2695                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
2696
2697                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2698
2699                         /// @TODO Encapsulate this into a function/method
2700                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2701                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2702                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2703                                 // create notification
2704                                 if (is_array($contact_record)) {
2705                                         $intro = DI::introFactory()->createNew(
2706                                                 $importer['uid'],
2707                                                 $contact_record['id'],
2708                                                 $note
2709                                         );
2710                                         DI::intro()->save($intro);
2711                                 }
2712
2713                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
2714
2715                                 if (($user['notify-flags'] & Notification\Type::INTRO) && $user['page-flags'] == User::PAGE_FLAGS_NORMAL) {
2716                                         DI::notify()->createFromArray([
2717                                                 'type'  => Notification\Type::INTRO,
2718                                                 'otype' => Notification\ObjectType::INTRO,
2719                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2720                                                 'uid'   => $user['uid'],
2721                                                 'cid'   => $contact_record['id'],
2722                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2723                                         ]);
2724                                 }
2725                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2726                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2727                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2728                                 }
2729
2730                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2731                                 $fields = ['pending' => false];
2732                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2733                                         $fields['rel'] = self::FRIEND;
2734                                 }
2735
2736                                 self::update($fields, $condition);
2737
2738                                 return true;
2739                         }
2740                 }
2741
2742                 return null;
2743         }
2744
2745         /**
2746          * Update the local relationship when a local user loses a follower
2747          *
2748          * @param array $contact User-specific contact (uid != 0) array
2749          * @throws HTTPException\InternalServerErrorException
2750          * @throws \ImagickException
2751          */
2752         public static function removeFollower(array $contact)
2753         {
2754                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2755                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
2756                 } elseif (!empty($contact['id'])) {
2757                         self::remove($contact['id']);
2758                 } else {
2759                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2760                 }
2761
2762                 $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
2763
2764                 DI::notification()->deleteForUserByVerb($contact['uid'], Activity::FOLLOW, ['actor-id' => $cdata['public']]);
2765         }
2766
2767         /**
2768          * Update the local relationship when a local user unfollow a contact.
2769          * Removes the contact for sharing-only protocols (feed and mail).
2770          *
2771          * @param array $contact User-specific contact (uid != 0) array
2772          * @throws HTTPException\InternalServerErrorException
2773          */
2774         public static function removeSharer(array $contact)
2775         {
2776                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2777                         self::remove($contact['id']);
2778                 } else {
2779                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2780                 }
2781         }
2782
2783         /**
2784          * Create a birthday event.
2785          *
2786          * Update the year and the birthday.
2787          */
2788         public static function updateBirthdays()
2789         {
2790                 $condition = [
2791                         '`bd` > ?
2792                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2793                         AND NOT `contact`.`pending`
2794                         AND NOT `contact`.`hidden`
2795                         AND NOT `contact`.`blocked`
2796                         AND NOT `contact`.`archive`
2797                         AND NOT `contact`.`deleted`',
2798                         DBA::NULL_DATE,
2799                         self::SHARING,
2800                         self::FRIEND
2801                 ];
2802
2803                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2804
2805                 while ($contact = DBA::fetch($contacts)) {
2806                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
2807
2808                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2809
2810                         if (Event::createBirthday($contact, $nextbd)) {
2811                                 // update bdyear
2812                                 DBA::update(
2813                                         'contact',
2814                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2815                                         ['id' => $contact['id']]
2816                                 );
2817                         }
2818                 }
2819                 DBA::close($contacts);
2820         }
2821
2822         /**
2823          * Remove the unavailable contact ids from the provided list
2824          *
2825          * @param array $contact_ids Contact id list
2826          * @return array
2827          * @throws \Exception
2828          */
2829         public static function pruneUnavailable(array $contact_ids)
2830         {
2831                 if (empty($contact_ids)) {
2832                         return [];
2833                 }
2834
2835                 $contacts = self::selectToArray(['id'], [
2836                         'id'      => $contact_ids,
2837                         'blocked' => false,
2838                         'pending' => false,
2839                         'archive' => false,
2840                 ]);
2841
2842                 return array_column($contacts, 'id');
2843         }
2844
2845         /**
2846          * Returns a magic link to authenticate remote visitors
2847          *
2848          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2849          *
2850          * @param string $contact_url The address of the target contact profile
2851          * @param string $url         An url that we will be redirected to after the authentication
2852          *
2853          * @return string with "redir" link
2854          * @throws HTTPException\InternalServerErrorException
2855          * @throws \ImagickException
2856          */
2857         public static function magicLink($contact_url, $url = '')
2858         {
2859                 if (!Session::isAuthenticated()) {
2860                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2861                 }
2862
2863                 $contact = self::getByURL($contact_url, false);
2864                 if (empty($contact)) {
2865                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2866                 }
2867
2868                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2869                 unset($contact['uid']);
2870
2871                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2872         }
2873
2874         /**
2875          * Returns a magic link to authenticate remote visitors
2876          *
2877          * @param integer $cid The contact id of the target contact profile
2878          * @param string  $url An url that we will be redirected to after the authentication
2879          *
2880          * @return string with "redir" link
2881          * @throws HTTPException\InternalServerErrorException
2882          * @throws \ImagickException
2883          */
2884         public static function magicLinkById($cid, $url = '')
2885         {
2886                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2887
2888                 return self::magicLinkByContact($contact, $url);
2889         }
2890
2891         /**
2892          * Returns a magic link to authenticate remote visitors
2893          *
2894          * @param array  $contact The contact array with "uid", "network" and "url"
2895          * @param string $url     An url that we will be redirected to after the authentication
2896          *
2897          * @return string with "redir" link
2898          * @throws HTTPException\InternalServerErrorException
2899          * @throws \ImagickException
2900          */
2901         public static function magicLinkByContact($contact, $url = '')
2902         {
2903                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2904
2905                 if (!Session::isAuthenticated()) {
2906                         return $destination;
2907                 }
2908
2909                 // Only redirections to the same host do make sense
2910                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2911                         return $url;
2912                 }
2913
2914                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2915                         return 'contact/' . $contact['id'] . '/conversations';
2916                 }
2917
2918                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2919                         return $destination;
2920                 }
2921
2922                 if (empty($contact['id'])) {
2923                         return $destination;
2924                 }
2925
2926                 $redirect = 'redir/' . $contact['id'];
2927
2928                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2929                         $redirect .= '?url=' . $url;
2930                 }
2931
2932                 return $redirect;
2933         }
2934
2935         /**
2936          * Is the contact a forum?
2937          *
2938          * @param integer $contactid ID of the contact
2939          *
2940          * @return boolean "true" if it is a forum
2941          */
2942         public static function isForum($contactid)
2943         {
2944                 $fields = ['contact-type'];
2945                 $condition = ['id' => $contactid];
2946                 $contact = DBA::selectFirst('contact', $fields, $condition);
2947                 if (!DBA::isResult($contact)) {
2948                         return false;
2949                 }
2950
2951                 // Is it a forum?
2952                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
2953         }
2954
2955         /**
2956          * Can the remote contact receive private messages?
2957          *
2958          * @param array $contact
2959          * @return bool
2960          */
2961         public static function canReceivePrivateMessages(array $contact)
2962         {
2963                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2964                 $self = $contact['self'] ?? false;
2965
2966                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2967         }
2968
2969         /**
2970          * Search contact table by nick or name
2971          *
2972          * @param string $search Name or nick
2973          * @param string $mode   Search mode (e.g. "community")
2974          * @param int    $uid    User ID
2975          *
2976          * @return array with search results
2977          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2978          */
2979         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2980         {
2981                 if (empty($search)) {
2982                         return [];
2983                 }
2984
2985                 // check supported networks
2986                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
2987                 if (DI::config()->get('system', 'diaspora_enabled')) {
2988                         $networks[] = Protocol::DIASPORA;
2989                 }
2990
2991                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2992                         $networks[] = Protocol::OSTATUS;
2993                 }
2994
2995                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
2996
2997                 if ($uid == 0) {
2998                         $condition['blocked'] = false;
2999                 }
3000
3001                 // check if we search only communities or every contact
3002                 if ($mode === 'community') {
3003                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3004                 }
3005
3006                 $search .= '%';
3007
3008                 $condition = DBA::mergeConditions($condition,
3009                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3010                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3011
3012                 $contacts = self::selectToArray([], $condition);
3013                 return $contacts;
3014         }
3015
3016         /**
3017          * Add public contacts from an array
3018          *
3019          * @param array $urls
3020          * @return array result "count", "added" and "updated"
3021          */
3022         public static function addByUrls(array $urls)
3023         {
3024                 $added = 0;
3025                 $updated = 0;
3026                 $unchanged = 0;
3027                 $count = 0;
3028
3029                 foreach ($urls as $url) {
3030                         if (empty($url) || !is_string($url)) {
3031                                 continue;
3032                         }
3033                         $contact = self::getByURL($url, false, ['id', 'updated']);
3034                         if (empty($contact['id'])) {
3035                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3036                                 ++$added;
3037                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3038                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3039                                 ++$updated;
3040                         } else {
3041                                 ++$unchanged;
3042                         }
3043                         ++$count;
3044                 }
3045
3046                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3047         }
3048
3049         /**
3050          * Returns a random, global contact array of the current node
3051          *
3052          * @return array The profile array
3053          * @throws Exception
3054          */
3055         public static function getRandomContact()
3056         {
3057                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3058                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3059                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3060                 ], ['order' => ['RAND()']]);
3061
3062                 if (DBA::isResult($contact)) {
3063                         return $contact;
3064                 }
3065
3066                 return [];
3067         }
3068 }