src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Contact\Avatar;
  25 use Friendica\Contact\Introduction\Exception\IntroductionNotFoundException;
  26 use Friendica\Content\Pager;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Renderer;
  32 use Friendica\Core\System;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\Database;
  35 use Friendica\Database\DBA;
  36 use Friendica\DI;
  37 use Friendica\Network\HTTPException;
  38 use Friendica\Network\Probe;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  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; // There is no relationship between the contact and the user
 100         const FOLLOWER = 1; // The contact is following this user (the contact is the subscriber)
 101         const SHARING  = 2; // The contact shares their content with this user (the user is the subscriber)
 102         const FRIEND   = 3; // There is a mutual relationship between the contact and the user
 103         const SELF     = 4; // This is the user theirself
 104         /**
 105          * @}
 106          */
 107
 108          const MIRROR_DEACTIVATED = 0;
 109          const MIRROR_FORWARDED = 1; // Deprecated, now does the same like MIRROR_OWN_POST
 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 = []): array
 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|bool
 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          * @param array $fields    Array of selected fields, empty for all
 141          * @param array $condition Array of fields for condition
 142          * @param array $params    Array of several parameters
 143          * @return array
 144          * @throws \Exception
 145          */
 146         public static function selectAccountToArray(array $fields = [], array $condition = [], array $params = []): array
 147         {
 148                 return DBA::selectToArray('account-user-view', $fields, $condition, $params);
 149         }
 150
 151         /**
 152          * @param array $fields    Array of selected fields, empty for all
 153          * @param array $condition Array of fields for condition
 154          * @param array $params    Array of several parameters
 155          * @return array|bool
 156          * @throws \Exception
 157          */
 158         public static function selectFirstAccount(array $fields = [], array $condition = [], array $params = [])
 159         {
 160                 return DBA::selectFirst('account-view', $fields, $condition, $params);
 161         }
 162
 163         /**
 164          * Insert a row into the contact table
 165          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 166          *
 167          * @param array $fields         field array
 168          * @param int   $duplicate_mode Do an update on a duplicate entry
 169          *
 170          * @return int  id of the created contact
 171          * @throws \Exception
 172          */
 173         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT): int
 174         {
 175                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 176                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 177                 }
 178
 179                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 180
 181                 if (empty($fields['created'])) {
 182                         $fields['created'] = DateTimeFormat::utcNow();
 183                 }
 184
 185                 $fields = DI::dbaDefinition()->truncateFieldsForTable('contact', $fields);
 186                 DBA::insert('contact', $fields, $duplicate_mode);
 187                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 188                 if (!DBA::isResult($contact)) {
 189                         // Shouldn't happen
 190                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 191                         return 0;
 192                 }
 193
 194                 $fields = DI::dbaDefinition()->truncateFieldsForTable('account-user', $contact);
 195                 DBA::insert('account-user', $fields, Database::INSERT_IGNORE);
 196                 $account_user = DBA::selectFirst('account-user', ['id'], ['uid' => $contact['uid'], 'uri-id' => $contact['uri-id']]);
 197                 if (empty($account_user['id'])) {
 198                         Logger::warning('Account-user entry not found', ['cid' => $contact['id'], 'uid' => $contact['uid'], 'uri-id' => $contact['uri-id'], 'url' => $contact['url']]);
 199                 } elseif ($account_user['id'] != $contact['id']) {
 200                         $duplicate = DBA::selectFirst('contact', [], ['id' => $account_user['id'], 'deleted' => false]);
 201                         if (!empty($duplicate['id'])) {
 202                                 $ret = Contact::deleteById($contact['id']);
 203                                 Logger::notice('Deleted duplicated contact', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $duplicate['id'], 'uid' => $duplicate['uid'], 'uri-id' => $duplicate['uri-id'], 'url' => $duplicate['url']]);
 204                                 $contact = $duplicate;
 205                         } else {
 206                                 $ret = DBA::update('account-user', ['id' => $contact['id']], ['uid' => $contact['uid'], 'uri-id' => $contact['uri-id']]);
 207                                 Logger::notice('Updated account-user', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $contact['id'], 'uid' => $contact['uid'], 'uri-id' => $contact['uri-id'], 'url' => $contact['url']]);
 208                         }
 209                 }
 210
 211                 Contact\User::insertForContactArray($contact);
 212
 213                 return $contact['id'];
 214         }
 215
 216         /**
 217          * Delete contact by id
 218          *
 219          * @param integer $id
 220          * @return boolean
 221          */
 222         public static function deleteById(int $id): bool
 223         {
 224                 Logger::debug('Delete contact', ['id' => $id]);
 225                 DBA::delete('account-user', ['id' => $id]);
 226                 return DBA::delete('contact', ['id' => $id]);
 227         }
 228
 229         /**
 230          * Updates rows in the contact table
 231          *
 232          * @param array         $fields     contains the fields that are updated
 233          * @param array         $condition  condition array with the key values
 234          * @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)
 235          *
 236          * @return boolean was the update successfull?
 237          * @throws \Exception
 238          * @todo Let's get rid of boolean type of $old_fields
 239          */
 240         public static function update(array $fields, array $condition, $old_fields = [])
 241         {
 242                 $fields = DI::dbaDefinition()->truncateFieldsForTable('contact', $fields);
 243                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 244
 245                 // Apply changes to the "user-contact" table on dedicated fields
 246                 Contact\User::updateByContactUpdate($fields, $condition);
 247
 248                 return $ret;
 249         }
 250
 251         /**
 252          * @param integer $id     Contact ID
 253          * @param array   $fields Array of selected fields, empty for all
 254          * @return array|boolean Contact record if it exists, false otherwise
 255          * @throws \Exception
 256          */
 257         public static function getById(int $id, array $fields = [])
 258         {
 259                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 260         }
 261
 262         /**
 263          * Fetch the first contact with the provided uri-id.
 264          *
 265          * @param integer $uri_id uri-id of the contact
 266          * @param array   $fields Array of selected fields, empty for all
 267          * @return array|boolean Contact record if it exists, false otherwise
 268          * @throws \Exception
 269          */
 270         public static function getByUriId(int $uri_id, array $fields = [])
 271         {
 272                 return DBA::selectFirst('contact', $fields, ['uri-id' => $uri_id], ['order' => ['uid']]);
 273         }
 274
 275         /**
 276          * Fetch all remote contacts for a given contact url
 277          *
 278          * @param string $url The URL of the contact
 279          * @param array  $fields The wanted fields
 280          *
 281          * @return array all remote contacts
 282          *
 283          * @throws \Exception
 284          */
 285         public static function getVisitorByUrl(string $url, array $fields = ['id', 'uid']): array
 286         {
 287                 $remote = [];
 288
 289                 $remote_contacts = DBA::select('contact', ['id', 'uid'], ['nurl' => Strings::normaliseLink($url), 'rel' => [Contact::FOLLOWER, Contact::FRIEND], 'self' => false]);
 290                 while ($contact = DBA::fetch($remote_contacts)) {
 291                         if (($contact['uid'] == 0) || Contact\User::isBlocked($contact['id'], $contact['uid'])) {
 292                                 continue;
 293                         }
 294                         $remote[$contact['uid']] = $contact['id'];
 295                 }
 296                 DBA::close($remote_contacts);
 297
 298                 return $remote;
 299         }
 300
 301         /**
 302          * Fetches a contact by a given url
 303          *
 304          * @param string  $url    profile url
 305          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 306          * @param array   $fields Field list
 307          * @param integer $uid    User ID of the contact
 308          * @return array contact array
 309          */
 310         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0): array
 311         {
 312                 if ($update || is_null($update)) {
 313                         $cid = self::getIdForURL($url, $uid, $update);
 314                         if (empty($cid)) {
 315                                 return [];
 316                         }
 317
 318                         $contact = self::getById($cid, $fields);
 319                         if (empty($contact)) {
 320                                 return [];
 321                         }
 322                         return $contact;
 323                 }
 324
 325                 // Add internal fields
 326                 $removal = [];
 327                 if (!empty($fields)) {
 328                         foreach (['id', 'next-update', 'network'] as $internal) {
 329                                 if (!in_array($internal, $fields)) {
 330                                         $fields[] = $internal;
 331                                         $removal[] = $internal;
 332                                 }
 333                         }
 334                 }
 335
 336                 // We first try the nurl (http://server.tld/nick), most common case
 337                 $options = ['order' => ['id']];
 338                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 339
 340                 // Then the addr (nick@server.tld)
 341                 if (!DBA::isResult($contact)) {
 342                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 343                 }
 344
 345                 // Then the alias (which could be anything)
 346                 if (!DBA::isResult($contact)) {
 347                         // The link could be provided as http although we stored it as https
 348                         $ssl_url = str_replace('http://', 'https://', $url);
 349                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 350                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 351                 }
 352
 353                 if (!DBA::isResult($contact)) {
 354                         return [];
 355                 }
 356
 357                 // Update the contact in the background if needed
 358                 if (Probe::isProbable($contact['network']) && ($contact['next-update'] < DateTimeFormat::utcNow())) {
 359                         Worker::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], 'UpdateContact', $contact['id']);
 360                 }
 361
 362                 // Remove the internal fields
 363                 foreach ($removal as $internal) {
 364                         unset($contact[$internal]);
 365                 }
 366
 367                 return $contact;
 368         }
 369
 370         /**
 371          * Fetches a contact for a given user by a given url.
 372          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 373          *
 374          * @param string  $url    profile url
 375          * @param integer $uid    User ID of the contact
 376          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 377          * @param array   $fields Field list
 378          * @return array contact array
 379          */
 380         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = []): array
 381         {
 382                 if ($uid != 0) {
 383                         $contact = self::getByURL($url, $update, $fields, $uid);
 384                         if (!empty($contact)) {
 385                                 if (!empty($contact['id'])) {
 386                                         $contact['cid'] = $contact['id'];
 387                                         $contact['zid'] = 0;
 388                                 }
 389                                 return $contact;
 390                         }
 391                 }
 392
 393                 $contact = self::getByURL($url, $update, $fields);
 394                 if (!empty($contact['id'])) {
 395                         $contact['cid'] = 0;
 396                         $contact['zid'] = $contact['id'];
 397                 }
 398                 return $contact;
 399         }
 400
 401         /**
 402          * Checks if a contact uses a specific platform
 403          *
 404          * @param string $url
 405          * @param string $platform
 406          * @return boolean
 407          */
 408         public static function isPlatform(string $url, string $platform): bool
 409         {
 410                 return DBA::exists('account-view', ['nurl' => Strings::normaliseLink($url), 'platform' => $platform]);
 411         }
 412
 413         /**
 414          * Tests if the given contact is a follower
 415          *
 416          * @param int  $cid    Either public contact id or user's contact id
 417          * @param int  $uid    User ID
 418          * @param bool $strict If "true" then contact mustn't be set to pending or readonly
 419          *
 420          * @return boolean is the contact id a follower?
 421          * @throws HTTPException\InternalServerErrorException
 422          * @throws \ImagickException
 423          */
 424         public static function isFollower(int $cid, int $uid, bool $strict = false): bool
 425         {
 426                 if (Contact\User::isBlocked($cid, $uid)) {
 427                         return false;
 428                 }
 429
 430                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 431                 if (empty($cdata['user'])) {
 432                         return false;
 433                 }
 434
 435                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 436                 if ($strict) {
 437                         $condition = array_merge($condition, ['pending' => false, 'readonly' => false, 'blocked' => false]);
 438                 }
 439                 return DBA::exists('contact', $condition);
 440         }
 441
 442         /**
 443          * Tests if the given contact url is a follower
 444          *
 445          * @param string $url    Contact URL
 446          * @param int    $uid    User ID
 447          * @param bool   $strict If "true" then contact mustn't be set to pending or readonly
 448          *
 449          * @return boolean is the contact id a follower?
 450          * @throws HTTPException\InternalServerErrorException
 451          * @throws \ImagickException
 452          */
 453         public static function isFollowerByURL(string $url, int $uid, bool $strict = false): bool
 454         {
 455                 $cid = self::getIdForURL($url, $uid);
 456
 457                 if (empty($cid)) {
 458                         return false;
 459                 }
 460
 461                 return self::isFollower($cid, $uid, $strict);
 462         }
 463
 464         /**
 465          * Tests if the given user shares with the given contact
 466          *
 467          * @param int  $cid    Either public contact id or user's contact id
 468          * @param int  $uid    User ID
 469          * @param bool $strict If "true" then contact mustn't be set to pending or readonly
 470          *
 471          * @return boolean is the contact sharing with given user?
 472          * @throws HTTPException\InternalServerErrorException
 473          * @throws \ImagickException
 474          */
 475         public static function isSharing(int $cid, int $uid, bool $strict = false): bool
 476         {
 477                 if (Contact\User::isBlocked($cid, $uid)) {
 478                         return false;
 479                 }
 480
 481                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 482                 if (empty($cdata['user'])) {
 483                         return false;
 484                 }
 485
 486                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 487                 if ($strict) {
 488                         $condition = array_merge($condition, ['pending' => false, 'readonly' => false, 'blocked' => false]);
 489                 }
 490                 return DBA::exists('contact', $condition);
 491         }
 492
 493         /**
 494          * Tests if the given user follow the given contact url
 495          *
 496          * @param string $url    Contact URL
 497          * @param int    $uid    User ID
 498          * @param bool   $strict If "true" then contact mustn't be set to pending or readonly
 499          *
 500          * @return boolean is the contact url being followed?
 501          * @throws HTTPException\InternalServerErrorException
 502          * @throws \ImagickException
 503          */
 504         public static function isSharingByURL(string $url, int $uid, bool $strict = false): bool
 505         {
 506                 $cid = self::getIdForURL($url, $uid);
 507
 508                 if (empty($cid)) {
 509                         return false;
 510                 }
 511
 512                 return self::isSharing($cid, $uid, $strict);
 513         }
 514
 515         /**
 516          * Get the basepath for a given contact link
 517          *
 518          * @param string $url The contact link
 519          * @param boolean $dont_update Don't update the contact
 520          *
 521          * @return string basepath
 522          * @throws HTTPException\InternalServerErrorException
 523          * @throws \ImagickException
 524          */
 525         public static function getBasepath(string $url, bool $dont_update = false): string
 526         {
 527                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 528                 if (!DBA::isResult($contact)) {
 529                         return '';
 530                 }
 531
 532                 if (!empty($contact['baseurl'])) {
 533                         return $contact['baseurl'];
 534                 } elseif ($dont_update) {
 535                         return '';
 536                 }
 537
 538                 // Update the existing contact
 539                 self::updateFromProbe($contact['id']);
 540
 541                 // And fetch the result
 542                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 543                 if (empty($contact['baseurl'])) {
 544                         Logger::info('No baseurl for contact', ['url' => $url]);
 545                         return '';
 546                 }
 547
 548                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 549                 return $contact['baseurl'];
 550         }
 551
 552         /**
 553          * Check if the given contact url is on the same server
 554          *
 555          * @param string $url The contact link
 556          *
 557          * @return boolean Is it the same server?
 558          */
 559         public static function isLocal(string $url): bool
 560         {
 561                 if (!parse_url($url, PHP_URL_SCHEME)) {
 562                         $addr_parts = explode('@', $url);
 563                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 564                 }
 565
 566                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 567         }
 568
 569         /**
 570          * Check if the given contact ID is on the same server
 571          *
 572          * @param string $url The contact link
 573          * @return boolean Is it the same server?
 574          */
 575         public static function isLocalById(int $cid): bool
 576         {
 577                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 578                 if (!DBA::isResult($contact)) {
 579                         return false;
 580                 }
 581
 582                 if (empty($contact['baseurl'])) {
 583                         $baseurl = self::getBasepath($contact['url'], true);
 584                 } else {
 585                         $baseurl = $contact['baseurl'];
 586                 }
 587
 588                 return Strings::compareLink($baseurl, DI::baseUrl());
 589         }
 590
 591         /**
 592          * Returns the public contact id of the given user id
 593          *
 594          * @param  integer $uid User ID
 595          *
 596          * @return integer|boolean Public contact id for given user id
 597          * @throws \Exception
 598          */
 599         public static function getPublicIdByUserId(int $uid)
 600         {
 601                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 602                 if (!DBA::isResult($self)) {
 603                         return false;
 604                 }
 605                 return self::getIdForURL($self['url']);
 606         }
 607
 608         /**
 609          * Returns the contact id for the user and the public contact id for a given contact id
 610          *
 611          * @param int $cid Either public contact id or user's contact id
 612          * @param int $uid User ID
 613          *
 614          * @return array with public and user's contact id
 615          * @throws HTTPException\InternalServerErrorException
 616          * @throws \ImagickException
 617          */
 618         public static function getPublicAndUserContactID(int $cid, int $uid): array
 619         {
 620                 // We have to use the legacy function as long as the post update hasn't finished
 621                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 622                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 623                 }
 624
 625                 if (empty($uid) || empty($cid)) {
 626                         return [];
 627                 }
 628
 629                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 630                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 631                         return [];
 632                 }
 633
 634                 $pcid = $contact['pid'];
 635                 if ($contact['uid'] == $uid) {
 636                         $ucid = $contact['id'];
 637                 } else {
 638                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 639                         if (DBA::isResult($contact)) {
 640                                 $ucid = $contact['id'];
 641                         } else {
 642                                 $ucid = 0;
 643                         }
 644                 }
 645
 646                 return ['public' => $pcid, 'user' => $ucid];
 647         }
 648
 649         /**
 650          * Helper function for "getPublicAndUserContactID"
 651          *
 652          * @param int $cid Either public contact id or user's contact id
 653          * @param int $uid User ID
 654          * @return array with public and user's contact id
 655          * @throws HTTPException\InternalServerErrorException
 656          * @throws \ImagickException
 657          */
 658         private static function legacyGetPublicAndUserContactID(int $cid, int $uid): array
 659         {
 660                 if (empty($uid) || empty($cid)) {
 661                         return [];
 662                 }
 663
 664                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 665                 if (!DBA::isResult($contact)) {
 666                         return [];
 667                 }
 668
 669                 // We quit when the user id don't match the user id of the provided contact
 670                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 671                         return [];
 672                 }
 673
 674                 if ($contact['uid'] != 0) {
 675                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 676                         if (empty($pcid)) {
 677                                 return [];
 678                         }
 679                         $ucid = $contact['id'];
 680                 } else {
 681                         $pcid = $contact['id'];
 682                         $ucid = self::getIdForURL($contact['url'], $uid);
 683                 }
 684
 685                 return ['public' => $pcid, 'user' => $ucid];
 686         }
 687
 688         /**
 689          * Returns contact details for a given contact id in combination with a user id
 690          *
 691          * @param int $cid A contact ID
 692          * @param int $uid The User ID
 693          * @param array $fields The selected fields for the contact
 694          * @return array The contact details
 695          *
 696          * @throws \Exception
 697          */
 698         public static function getContactForUser(int $cid, int $uid, array $fields = []): array
 699         {
 700                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 701
 702                 if (!DBA::isResult($contact)) {
 703                         return [];
 704                 } else {
 705                         return $contact;
 706                 }
 707         }
 708
 709         /**
 710          * Creates the self-contact for the provided user id
 711          *
 712          * @param int $uid
 713          * @return bool Operation success
 714          * @throws HTTPException\InternalServerErrorException
 715          */
 716         public static function createSelfFromUserId(int $uid): bool
 717         {
 718                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 719                         ['uid' => $uid, 'account_expired' => false]);
 720                 if (!DBA::isResult($user)) {
 721                         return false;
 722                 }
 723
 724                 $contact = [
 725                         'uid'         => $user['uid'],
 726                         'created'     => DateTimeFormat::utcNow(),
 727                         'self'        => 1,
 728                         'name'        => $user['username'],
 729                         'nick'        => $user['nickname'],
 730                         'pubkey'      => $user['pubkey'],
 731                         'prvkey'      => $user['prvkey'],
 732                         'photo'       => User::getAvatarUrl($user),
 733                         'thumb'       => User::getAvatarUrl($user, Proxy::SIZE_THUMB),
 734                         'micro'       => User::getAvatarUrl($user, Proxy::SIZE_MICRO),
 735                         'blocked'     => 0,
 736                         'pending'     => 0,
 737                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 738                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 739                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 740                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 741                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 742                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 743                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 744                         'name-date'   => DateTimeFormat::utcNow(),
 745                         'uri-date'    => DateTimeFormat::utcNow(),
 746                         'avatar-date' => DateTimeFormat::utcNow(),
 747                         'closeness'   => 0
 748                 ];
 749
 750                 $return = true;
 751
 752                 // Only create the entry if it doesn't exist yet
 753                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 754                         $return = (bool)self::insert($contact);
 755                 }
 756
 757                 // Create the public contact
 758                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 759                         $contact['self']   = false;
 760                         $contact['uid']    = 0;
 761                         $contact['prvkey'] = null;
 762
 763                         self::insert($contact, Database::INSERT_IGNORE);
 764                 }
 765
 766                 return $return;
 767         }
 768
 769         /**
 770          * Updates the self-contact for the provided user id
 771          *
 772          * @param int   $uid
 773          * @param bool  $update_avatar Force the avatar update
 774          * @return bool "true" if updated
 775          * @throws HTTPException\InternalServerErrorException
 776          */
 777         public static function updateSelfFromUserID(int $uid, bool $update_avatar = false): bool
 778         {
 779                 $fields = ['id', 'uri-id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey', 'manually-approve',
 780                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 781                         'photo', 'thumb', 'micro', 'header', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 782                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 783                 if (!DBA::isResult($self)) {
 784                         return false;
 785                 }
 786
 787                 $fields = ['uid', 'nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 788                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 789                 if (!DBA::isResult($user)) {
 790                         return false;
 791                 }
 792
 793                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 794                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 795                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 796                 if (!DBA::isResult($profile)) {
 797                         return false;
 798                 }
 799
 800                 $file_suffix = 'jpg';
 801                 $url = DI::baseUrl() . '/profile/' . $user['nickname'];
 802
 803                 $fields = [
 804                         'name'         => $profile['name'],
 805                         'nick'         => $user['nickname'],
 806                         'avatar-date'  => $self['avatar-date'],
 807                         'location'     => Profile::formatLocation($profile),
 808                         'about'        => $profile['about'],
 809                         'keywords'     => $profile['pub_keywords'],
 810                         'contact-type' => $user['account-type'],
 811                         'prvkey'       => $user['prvkey'],
 812                         'pubkey'       => $user['pubkey'],
 813                         'xmpp'         => $profile['xmpp'],
 814                         'matrix'       => $profile['matrix'],
 815                         'network'      => Protocol::DFRN,
 816                         'url'          => $url,
 817                         // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 818                         'nurl'         => Strings::normaliseLink($url),
 819                         'uri-id'       => ItemURI::getIdByURI($url),
 820                         'addr'         => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 821                         'request'      => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 822                         'notify'       => DI::baseUrl() . '/dfrn_notify/' . $user['nickname'],
 823                         'poll'         => DI::baseUrl() . '/dfrn_poll/'. $user['nickname'],
 824                         'confirm'      => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 825                 ];
 826
 827
 828                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 829                 if (DBA::isResult($avatar)) {
 830                         if ($update_avatar) {
 831                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 832                         }
 833
 834                         // Creating the path to the avatar, beginning with the file suffix
 835                         $types = Images::supportedTypes();
 836                         if (isset($types[$avatar['type']])) {
 837                                 $file_suffix = $types[$avatar['type']];
 838                         }
 839
 840                         // We are adding a timestamp value so that other systems won't use cached content
 841                         $timestamp = strtotime($fields['avatar-date']);
 842
 843                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 844                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 845
 846                         $fields['photo'] = $prefix . '4' . $suffix;
 847                         $fields['thumb'] = $prefix . '5' . $suffix;
 848                         $fields['micro'] = $prefix . '6' . $suffix;
 849                 } else {
 850                         // We hadn't found a photo entry, so we use the default avatar
 851                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 852                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 853                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 854                 }
 855
 856                 $fields['avatar'] = User::getAvatarUrl($user);
 857                 $fields['header'] = User::getBannerUrl($user);
 858                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 859                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 860                 $fields['unsearchable'] = !$profile['net-publish'];
 861                 $fields['manually-approve'] = in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
 862
 863                 $update = false;
 864
 865                 foreach ($fields as $field => $content) {
 866                         if ($self[$field] != $content) {
 867                                 $update = true;
 868                         }
 869                 }
 870
 871                 if ($update) {
 872                         if ($fields['name'] != $self['name']) {
 873                                 $fields['name-date'] = DateTimeFormat::utcNow();
 874                         }
 875                         $fields['updated'] = DateTimeFormat::utcNow();
 876                         self::update($fields, ['id' => $self['id']]);
 877
 878                         // Update the other contacts as well
 879                         unset($fields['prvkey']);
 880                         $fields['self'] = false;
 881                         self::update($fields, ['uri-id' => $self['uri-id'], 'self' => false]);
 882
 883                         // Update the profile
 884                         $fields = [
 885                                 'photo' => User::getAvatarUrl($user),
 886                                 'thumb' => User::getAvatarUrl($user, Proxy::SIZE_THUMB)
 887                         ];
 888
 889                         DBA::update('profile', $fields, ['uid' => $uid]);
 890                 }
 891
 892                 return $update;
 893         }
 894
 895         /**
 896          * Marks a contact for removal
 897          *
 898          * @param int $id contact id
 899          * @return void
 900          * @throws HTTPException\InternalServerErrorException
 901          */
 902         public static function remove(int $id)
 903         {
 904                 // We want just to make sure that we don't delete our "self" contact
 905                 $contact = DBA::selectFirst('contact', ['uri-id', 'photo', 'thumb', 'micro', 'uid'], ['id' => $id, 'self' => false]);
 906                 if (!DBA::isResult($contact)) {
 907                         return;
 908                 }
 909
 910                 DBA::delete('account-user', ['id' => $id]);
 911
 912                 self::clearFollowerFollowingEndpointCache($contact['uid']);
 913
 914                 // Archive the contact
 915                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'rel' => self::NOTHING, 'deleted' => true], ['id' => $id]);
 916
 917                 if (!DBA::exists('contact', ['uri-id' => $contact['uri-id'], 'deleted' => false])) {
 918                         Avatar::deleteCache($contact);
 919                 }
 920
 921                 // Delete it in the background
 922                 Worker::add(Worker::PRIORITY_MEDIUM, 'Contact\Remove', $id);
 923         }
 924
 925         /**
 926          * Unfollow the remote contact
 927          *
 928          * @param array $contact Target user-specific contact (uid != 0) array
 929          * @return void
 930          * @throws HTTPException\InternalServerErrorException
 931          * @throws \ImagickException
 932          */
 933         public static function unfollow(array $contact): void
 934         {
 935                 if (empty($contact['network'])) {
 936                         throw new \InvalidArgumentException('Empty network in contact array');
 937                 }
 938
 939                 if (empty($contact['uid'])) {
 940                         throw new \InvalidArgumentException('Unexpected public contact record');
 941                 }
 942
 943                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 944                         $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
 945                         if (!empty($cdata['public'])) {
 946                                 Worker::add(Worker::PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 947                         }
 948                 }
 949
 950                 self::removeSharer($contact);
 951         }
 952
 953         /**
 954          * Revoke follow privileges of the remote user contact
 955          *
 956          * The local relationship is updated immediately, the eventual remote server is messaged in the background.
 957          *
 958          * @param array $contact User-specific contact array (uid != 0) to revoke the follow from
 959          * @return void
 960          * @throws HTTPException\InternalServerErrorException
 961          * @throws \ImagickException
 962          */
 963         public static function revokeFollow(array $contact): void
 964         {
 965                 if (empty($contact['network'])) {
 966                         throw new \InvalidArgumentException('Empty network in contact array');
 967                 }
 968
 969                 if (empty($contact['uid'])) {
 970                         throw new \InvalidArgumentException('Unexpected public contact record');
 971                 }
 972
 973                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 974                         $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
 975                         if (!empty($cdata['public'])) {
 976                                 Worker::add(Worker::PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 977                         }
 978                 }
 979
 980                 self::removeFollower($contact);
 981         }
 982
 983         /**
 984          * Completely severs a relationship with a contact
 985          *
 986          * @param array $contact User-specific contact (uid != 0) array
 987          * @return void
 988          * @throws HTTPException\InternalServerErrorException
 989          * @throws \ImagickException
 990          */
 991         public static function terminateFriendship(array $contact)
 992         {
 993                 if (empty($contact['network'])) {
 994                         throw new \InvalidArgumentException('Empty network in contact array');
 995                 }
 996
 997                 if (empty($contact['uid'])) {
 998                         throw new \InvalidArgumentException('Unexpected public contact record');
 999                 }
1000
1001                 $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
1002
1003                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND]) && !empty($cdata['public'])) {
1004                         Worker::add(Worker::PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
1005                 }
1006
1007                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) && !empty($cdata['public'])) {
1008                         Worker::add(Worker::PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
1009                 }
1010
1011                 self::remove($contact['id']);
1012         }
1013
1014         private static function clearFollowerFollowingEndpointCache(int $uid)
1015         {
1016                 if (empty($uid)) {
1017                         return;
1018                 }
1019
1020                 DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_CONTACTS . 'followers:' . $uid);
1021                 DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_CONTACTS . 'following:' . $uid);
1022         }
1023
1024         /**
1025          * Marks a contact for archival after a communication issue delay
1026          *
1027          * Contact has refused to recognise us as a friend. We will start a countdown.
1028          * If they still don't recognise us in 32 days, the relationship is over,
1029          * and we won't waste any more time trying to communicate with them.
1030          * This provides for the possibility that their database is temporarily messed
1031          * up or some other transient event and that there's a possibility we could recover from it.
1032          *
1033          * @param array $contact contact to mark for archival
1034          * @return void
1035          * @throws HTTPException\InternalServerErrorException
1036          */
1037         public static function markForArchival(array $contact)
1038         {
1039                 if (!isset($contact['url']) && !empty($contact['id'])) {
1040                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
1041                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
1042                         if (!DBA::isResult($contact)) {
1043                                 return;
1044                         }
1045                 } elseif (!isset($contact['url'])) {
1046                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
1047                 }
1048
1049                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
1050
1051                 // Contact already archived or "self" contact? => nothing to do
1052                 if ($contact['archive'] || $contact['self']) {
1053                         return;
1054                 }
1055
1056                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
1057                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
1058                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
1059                 } else {
1060                         /* @todo
1061                          * We really should send a notification to the owner after 2-3 weeks
1062                          * so they won't be surprised when the contact vanishes and can take
1063                          * remedial action if this was a serious mistake or glitch
1064                          */
1065
1066                         /// @todo Check for contact vitality via probing
1067                         $archival_days = DI::config()->get('system', 'archival_days', 32);
1068
1069                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
1070                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
1071                                 /* Relationship is really truly dead. archive them rather than
1072                                  * delete, though if the owner tries to unarchive them we'll start
1073                                  * the whole process over again.
1074                                  */
1075                                 self::update(['archive' => true], ['id' => $contact['id']]);
1076                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1077                         }
1078                 }
1079         }
1080
1081         /**
1082          * Cancels the archival countdown
1083          *
1084          * @see   Contact::markForArchival()
1085          *
1086          * @param array $contact contact to be unmarked for archival
1087          * @return void
1088          * @throws \Exception
1089          */
1090         public static function unmarkForArchival(array $contact)
1091         {
1092                 // Always unarchive the relay contact entry
1093                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
1094                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
1095                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1096                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
1097                                 self::update($fields, $condition);
1098                         }
1099                 }
1100
1101                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
1102                 $exists = DBA::exists('contact', $condition);
1103
1104                 // We don't need to update, we never marked this contact for archival
1105                 if (!$exists) {
1106                         return;
1107                 }
1108
1109                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
1110
1111                 if (!isset($contact['url']) && !empty($contact['id'])) {
1112                         $fields = ['id', 'url', 'batch'];
1113                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
1114                         if (!DBA::isResult($contact)) {
1115                                 return;
1116                         }
1117                 }
1118
1119                 // It's a miracle. Our dead contact has inexplicably come back to life.
1120                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
1121                 self::update($fields, ['id' => $contact['id']]);
1122                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1123         }
1124
1125         /**
1126          * Returns the data array for the photo menu of a given contact
1127          *
1128          * @param array $contact contact
1129          * @param int   $uid     optional, default 0
1130          * @return array
1131          * @throws HTTPException\InternalServerErrorException
1132          * @throws \ImagickException
1133          */
1134         public static function photoMenu(array $contact, int $uid = 0): array
1135         {
1136                 $pm_url = '';
1137                 $status_link = '';
1138                 $photos_link = '';
1139
1140                 if ($uid == 0) {
1141                         $uid = DI::userSession()->getLocalUserId();
1142                 }
1143
1144                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1145                         if ($uid == 0) {
1146                                 $profile_link = self::magicLinkByContact($contact);
1147                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1148
1149                                 return $menu;
1150                         }
1151
1152                         // Look for our own contact if the uid doesn't match and isn't public
1153                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1154                         if (DBA::isResult($contact_own)) {
1155                                 return self::photoMenu($contact_own, $uid);
1156                         }
1157                 }
1158
1159                 $sparkle = false;
1160                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1161                         $sparkle = true;
1162                         $profile_link = 'contact/redir/' . $contact['id'];
1163                 } else {
1164                         $profile_link = $contact['url'];
1165                 }
1166
1167                 if ($profile_link === 'mailbox') {
1168                         $profile_link = '';
1169                 }
1170
1171                 if ($sparkle) {
1172                         $status_link = $profile_link . '/status';
1173                         $photos_link = $profile_link . '/photos';
1174                         $profile_link = $profile_link . '/profile';
1175                 }
1176
1177                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1178                         $pm_url = 'message/new/' . $contact['id'];
1179                 }
1180
1181                 $contact_url = 'contact/' . $contact['id'];
1182
1183                 $posts_link = 'contact/' . $contact['id'] . '/conversations';
1184
1185                 $follow_link = '';
1186                 $unfollow_link = '';
1187                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1188                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1189                                 $unfollow_link = 'contact/unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1190                         } elseif(!$contact['pending']) {
1191                                 $follow_link = 'contact/follow?url=' . urlencode($contact['url']) . '&auto=1';
1192                         }
1193                 }
1194
1195                 /**
1196                  * Menu array:
1197                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1198                  */
1199                 if (empty($contact['uid'])) {
1200                         $menu = [
1201                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1202                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1203                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1204                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1205                                 'unfollow'=> [DI::l10n()->t('Unfollow')      , $unfollow_link, true],
1206                         ];
1207                 } else {
1208                         $menu = [
1209                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1210                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1211                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1212                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1213                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1214                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1215                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1216                                 'unfollow'=> [DI::l10n()->t('Unfollow')      , $unfollow_link    , true],
1217                         ];
1218
1219                         if (!empty($contact['pending'])) {
1220                                 try {
1221                                         $intro = DI::intro()->selectForContact($contact['id']);
1222                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1223                                 } catch (IntroductionNotFoundException $exception) {
1224                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1225                                 }
1226                         }
1227                 }
1228
1229                 $args = ['contact' => $contact, 'menu' => &$menu];
1230
1231                 Hook::callAll('contact_photo_menu', $args);
1232
1233                 $menucondensed = [];
1234
1235                 foreach ($menu as $menuname => $menuitem) {
1236                         if ($menuitem[1] != '') {
1237                                 $menucondensed[$menuname] = $menuitem;
1238                         }
1239                 }
1240
1241                 return $menucondensed;
1242         }
1243
1244         /**
1245          * Fetch the contact id for a given URL and user
1246          *
1247          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1248          * `addr` or `alias`.
1249          *
1250          * If there's no record and we aren't looking for a public contact, we quit.
1251          * If there's one, we check that it isn't time to update the picture else we
1252          * directly return the found contact id.
1253          *
1254          * Second, we probe the provided $url whether it's http://server.tld/profile or
1255          * nick@server.tld. We quit if we can't get any info back.
1256          *
1257          * Third, we create the contact record if it doesn't exist
1258          *
1259          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1260          * if there's any updates
1261          *
1262          * @param string  $url       Contact URL
1263          * @param integer $uid       The user id for the contact (0 = public contact)
1264          * @param boolean $update    true = always update, false = never update, null = update when not found
1265          * @param array   $default   Default value for creating the contact when everything else fails
1266          *
1267          * @return integer Contact ID
1268          * @throws HTTPException\InternalServerErrorException
1269          * @throws \ImagickException
1270          */
1271         public static function getIdForURL(string $url = null, int $uid = 0, $update = null, array $default = []): int
1272         {
1273                 $contact_id = 0;
1274
1275                 if (empty($url)) {
1276                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1277                         return 0;
1278                 }
1279
1280                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id', 'next-update'], $uid);
1281
1282                 if (!empty($contact)) {
1283                         $contact_id = $contact['id'];
1284
1285                         if (Probe::isProbable($contact['network']) && ($contact['next-update'] < DateTimeFormat::utcNow())) {
1286                                 Worker::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], 'UpdateContact', $contact['id']);
1287                         }
1288
1289                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1290                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1291                                 return $contact_id;
1292                         }
1293                 } elseif ($uid != 0) {
1294                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1295                         return 0;
1296                 } elseif (empty($default) && !is_null($update) && !$update) {
1297                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1298                         return 0;
1299                 }
1300
1301                 $data = [];
1302
1303                 if (empty($default['network']) || $update) {
1304                         $data = Probe::uri($url, '', $uid);
1305
1306                         // Take the default values when probing failed
1307                         if (!empty($default) && !in_array($data['network'], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1308                                 $data = array_merge($data, $default);
1309                         }
1310                 } elseif (!empty($default['network'])) {
1311                         $data = $default;
1312                 }
1313
1314                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1315                         // Fetch data for the public contact via the first found personal contact
1316                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1317                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1318                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1319                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1320
1321                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1322                         if (!DBA::isResult($personal_contact)) {
1323                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1324                         }
1325
1326                         if (DBA::isResult($personal_contact)) {
1327                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1328                                 $data = $personal_contact;
1329                                 $data['photo'] = $personal_contact['avatar'];
1330                                 $data['account-type'] = $personal_contact['contact-type'];
1331                                 $data['hide'] = $personal_contact['unsearchable'];
1332                                 unset($data['avatar']);
1333                                 unset($data['contact-type']);
1334                                 unset($data['unsearchable']);
1335                         }
1336                 }
1337
1338                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1339                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1340                         return 0;
1341                 }
1342
1343                 if (!$contact_id && !empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1344                         Logger::info('Contact is a tombstone. It will not be inserted', ['url' => $url, 'uid' => $uid]);
1345                         return 0;
1346                 }
1347
1348                 if (!$contact_id) {
1349                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1350                         if (!empty($data['alias'])) {
1351                                 $urls[] = Strings::normaliseLink($data['alias']);
1352                         }
1353                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1354                         if (!empty($contact['id'])) {
1355                                 $contact_id = $contact['id'];
1356                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1357                         }
1358                 }
1359
1360                 if (!$contact_id) {
1361                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1362                         $fields = [
1363                                 'uid'       => $uid,
1364                                 'url'       => $data['url'],
1365                                 'nurl'      => Strings::normaliseLink($data['url']),
1366                                 'network'   => $data['network'],
1367                                 'created'   => DateTimeFormat::utcNow(),
1368                                 'rel'       => self::SHARING,
1369                                 'writable'  => 1,
1370                                 'blocked'   => 0,
1371                                 'readonly'  => 0,
1372                                 'pending'   => 0,
1373                         ];
1374
1375                         $condition = ['nurl' => Strings::normaliseLink($data['url']), 'uid' => $uid, 'deleted' => false];
1376
1377                         // Before inserting we do check if the entry does exist now.
1378                         $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1379                         if (DBA::isResult($contact)) {
1380                                 $contact_id = $contact['id'];
1381                                 Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1382                         } else {
1383                                 $contact_id = self::insert($fields);
1384                                 if ($contact_id) {
1385                                         Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1386                                 }
1387                         }
1388
1389                         if (!$contact_id) {
1390                                 Logger::warning('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1391                                 return 0;
1392                         }
1393                 } else {
1394                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1395                 }
1396
1397                 if ($data['network'] == Protocol::DIASPORA) {
1398                         FContact::updateFromProbeArray($data);
1399                 }
1400
1401                 self::updateFromProbeArray($contact_id, $data);
1402
1403                 // Don't return a number for a deleted account
1404                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1405                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1406                         return 0;
1407                 }
1408
1409                 return $contact_id;
1410         }
1411
1412         /**
1413          * Checks if the contact is archived
1414          *
1415          * @param int $cid contact id
1416          *
1417          * @return boolean Is the contact archived?
1418          * @throws HTTPException\InternalServerErrorException
1419          */
1420         public static function isArchived(int $cid): bool
1421         {
1422                 if ($cid == 0) {
1423                         return false;
1424                 }
1425
1426                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1427                 if (!DBA::isResult($contact)) {
1428                         return false;
1429                 }
1430
1431                 if ($contact['archive']) {
1432                         return true;
1433                 }
1434
1435                 // Check status of ActivityPub endpoints
1436                 $apcontact = APContact::getByURL($contact['url'], false);
1437                 if (!empty($apcontact)) {
1438                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1439                                 return true;
1440                         }
1441
1442                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1443                                 return true;
1444                         }
1445                 }
1446
1447                 // Check status of Diaspora endpoints
1448                 if (!empty($contact['batch'])) {
1449                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1450                         return DBA::exists('contact', $condition);
1451                 }
1452
1453                 return false;
1454         }
1455
1456         /**
1457          * Checks if the contact is blocked
1458          *
1459          * @param int $cid contact id
1460          * @return boolean Is the contact blocked?
1461          * @throws HTTPException\InternalServerErrorException
1462          */
1463         public static function isBlocked(int $cid): bool
1464         {
1465                 if ($cid == 0) {
1466                         return false;
1467                 }
1468
1469                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1470                 if (!DBA::isResult($blocked)) {
1471                         return false;
1472                 }
1473
1474                 if (Network::isUrlBlocked($blocked['url'])) {
1475                         return true;
1476                 }
1477
1478                 return (bool) $blocked['blocked'];
1479         }
1480
1481         /**
1482          * Checks if the contact is hidden
1483          *
1484          * @param int $cid contact id
1485          * @return boolean Is the contact hidden?
1486          * @throws \Exception
1487          */
1488         public static function isHidden(int $cid): bool
1489         {
1490                 if ($cid == 0) {
1491                         return false;
1492                 }
1493
1494                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1495                 if (!DBA::isResult($hidden)) {
1496                         return false;
1497                 }
1498                 return (bool) $hidden['hidden'];
1499         }
1500
1501         /**
1502          * Returns posts from a given contact url
1503          *
1504          * @param string $contact_url Contact URL
1505          * @param bool   $thread_mode
1506          * @param int    $update      Update mode
1507          * @param int    $parent      Item parent ID for the update mode
1508          * @param bool   $only_media  Only display media content
1509          * @return string posts in HTML
1510          * @throws \Exception
1511          */
1512         public static function getPostsFromUrl(string $contact_url, bool $thread_mode = false, int $update = 0, int $parent = 0, bool $only_media = false): string
1513         {
1514                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1515         }
1516
1517         /**
1518          * Returns posts from a given contact id
1519          *
1520          * @param int  $cid         Contact ID
1521          * @param bool $thread_mode
1522          * @param int  $update      Update mode
1523          * @param int  $parent      Item parent ID for the update mode
1524          * @param bool $only_media  Only display media content
1525          * @return string posts in HTML
1526          * @throws \Exception
1527          */
1528         public static function getPostsFromId(int $cid, bool $thread_mode = false, int $update = 0, int $parent = 0, bool $only_media = false): string
1529         {
1530                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1531                 if (!DBA::isResult($contact)) {
1532                         return '';
1533                 }
1534
1535                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1536                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1537                 } else {
1538                         $sql = "`uid` = ?";
1539                 }
1540
1541                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1542
1543                 if ($thread_mode) {
1544                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ? AND `thr-parent-id` = `parent-uri-id`)) AND " . $sql,
1545                                 $cid, Item::GRAVITY_PARENT, $cid, Item::GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), DI::userSession()->getLocalUserId()];
1546                 } else {
1547                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1548                                 $cid, Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT, DI::userSession()->getLocalUserId()];
1549                 }
1550
1551                 if (!empty($parent)) {
1552                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1553                 } else {
1554                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1555                         if (!empty($last_received)) {
1556                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1557                         }
1558                 }
1559
1560                 if ($only_media) {
1561                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1562                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1563                 }
1564
1565                 if (DI::mode()->isMobile()) {
1566                         $itemsPerPage = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'itemspage_mobile_network',
1567                                 DI::config()->get('system', 'itemspage_network_mobile'));
1568                 } else {
1569                         $itemsPerPage = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'itemspage_network',
1570                                 DI::config()->get('system', 'itemspage_network'));
1571                 }
1572
1573                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1574
1575                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1576
1577                 if (DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'infinite_scroll')) {
1578                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1579                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1580                 } else {
1581                         $o = '';
1582                 }
1583
1584                 if ($thread_mode) {
1585                         $fields = ['uri-id', 'thr-parent-id', 'gravity', 'author-id', 'commented'];
1586                         $items = Post::toArray(Post::selectForUser(DI::userSession()->getLocalUserId(), $fields, $condition, $params));
1587
1588                         if ($pager->getStart() == 0) {
1589                                 $cdata = self::getPublicAndUserContactID($cid, DI::userSession()->getLocalUserId());
1590                                 if (!empty($cdata['public'])) {
1591                                         $pinned = Post\Collection::selectToArrayForContact($cdata['public'], Post\Collection::FEATURED, $fields);
1592                                         $items = array_merge($items, $pinned);
1593                                 }
1594                         }
1595
1596                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'pinned_commented', DI::userSession()->getLocalUserId());
1597                 } else {
1598                         $fields = array_merge(Item::DISPLAY_FIELDLIST, ['featured']);
1599                         $items = Post::toArray(Post::selectForUser(DI::userSession()->getLocalUserId(), $fields, $condition, $params));
1600
1601                         if ($pager->getStart() == 0) {
1602                                 $cdata = self::getPublicAndUserContactID($cid, DI::userSession()->getLocalUserId());
1603                                 if (!empty($cdata['public'])) {
1604                                         $condition = ["`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
1605                                                 $cdata['public'], Post\Collection::FEATURED];
1606                                         $pinned = Post::toArray(Post::selectForUser(DI::userSession()->getLocalUserId(), $fields, $condition, $params));
1607                                         $items = array_merge($pinned, $items);
1608                                 }
1609                         }
1610
1611                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1612                 }
1613
1614                 if (!$update) {
1615                         if (DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'infinite_scroll')) {
1616                                 $o .= HTML::scrollLoader();
1617                         } else {
1618                                 $o .= $pager->renderMinimal(count($items));
1619                         }
1620                 }
1621
1622                 return $o;
1623         }
1624
1625         /**
1626          * Returns the account type name
1627          *
1628          * The function can be called with either the user or the contact array
1629          *
1630          * @param int $type type of contact or account
1631          * @return string
1632          */
1633         public static function getAccountType(int $type): string
1634         {
1635                 switch ($type) {
1636                         case self::TYPE_ORGANISATION:
1637                                 $account_type = DI::l10n()->t("Organisation");
1638                                 break;
1639
1640                         case self::TYPE_NEWS:
1641                                 $account_type = DI::l10n()->t('News');
1642                                 break;
1643
1644                         case self::TYPE_COMMUNITY:
1645                                 $account_type = DI::l10n()->t("Forum");
1646                                 break;
1647
1648                         default:
1649                                 $account_type = "";
1650                                 break;
1651                 }
1652
1653                 return $account_type;
1654         }
1655
1656         /**
1657          * Blocks a contact
1658          *
1659          * @param int $cid Contact id to block
1660          * @param string $reason Block reason
1661          * @return bool Whether it was successful
1662          */
1663         public static function block(int $cid, string $reason = null): bool
1664         {
1665                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1666
1667                 return $return;
1668         }
1669
1670         /**
1671          * Unblocks a contact
1672          *
1673          * @param int $cid Contact id to unblock
1674          * @return bool Whether it was successfull
1675          */
1676         public static function unblock(int $cid): bool
1677         {
1678                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1679
1680                 return $return;
1681         }
1682
1683         /**
1684          * Ensure that cached avatar exist
1685          *
1686          * @param integer $cid Contact id
1687          */
1688         public static function checkAvatarCache(int $cid)
1689         {
1690                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1691                 if (!DBA::isResult($contact)) {
1692                         return;
1693                 }
1694
1695                 if (Network::isLocalLink($contact['url'])) {
1696                         return;
1697                 }
1698
1699                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1700                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1701                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1702                                 self::updateAvatar($cid, $contact['avatar'], true);
1703                                 return;
1704                         }
1705                 } elseif (Photo::isPhotoURI($contact['photo']) || Photo::isPhotoURI($contact['thumb']) || Photo::isPhotoURI($contact['micro'])) {
1706                         Logger::info('Replacing legacy avatar cache', ['id' => $cid, 'contact' => $contact]);
1707                         self::updateAvatar($cid, $contact['avatar'], true);
1708                         return;
1709                 } elseif (DI::config()->get('system', 'avatar_cache') && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1710                         Logger::info('Adding avatar cache file', ['id' => $cid, 'contact' => $contact]);
1711                         self::updateAvatar($cid, $contact['avatar'], true);
1712                 return;
1713                 }
1714         }
1715
1716         /**
1717          * Return the photo path for a given contact array in the given size
1718          *
1719          * @param array  $contact   contact array
1720          * @param string $size      Size of the avatar picture
1721          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1722          * @return string photo path
1723          */
1724         private static function getAvatarPath(array $contact, string $size, bool $no_update = false): string
1725         {
1726                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1727
1728                 if (DI::config()->get('system', 'avatar_cache')) {
1729                         switch ($size) {
1730                                 case Proxy::SIZE_MICRO:
1731                                         if (!empty($contact['micro']) && !Photo::isPhotoURI($contact['micro'])) {
1732                                                 return $contact['micro'];
1733                                         }
1734                                         break;
1735                                 case Proxy::SIZE_THUMB:
1736                                         if (!empty($contact['thumb']) && !Photo::isPhotoURI($contact['thumb'])) {
1737                                                 return $contact['thumb'];
1738                                         }
1739                                         break;
1740                                 case Proxy::SIZE_SMALL:
1741                                         if (!empty($contact['photo']) && !Photo::isPhotoURI($contact['photo'])) {
1742                                                 return $contact['photo'];
1743                                         }
1744                                         break;
1745                         }
1746                 }
1747
1748                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1749         }
1750
1751         /**
1752          * Return the photo path for a given contact array
1753          *
1754          * @param array  $contact   Contact array
1755          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1756          * @return string photo path
1757          */
1758         public static function getPhoto(array $contact, bool $no_update = false): string
1759         {
1760                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1761         }
1762
1763         /**
1764          * Return the photo path (thumb size) for a given contact array
1765          *
1766          * @param array  $contact   Contact array
1767          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1768          * @return string photo path
1769          */
1770         public static function getThumb(array $contact, bool $no_update = false): string
1771         {
1772                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1773         }
1774
1775         /**
1776          * Return the photo path (micro size) for a given contact array
1777          *
1778          * @param array  $contact   Contact array
1779          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1780          * @return string photo path
1781          */
1782         public static function getMicro(array $contact, bool $no_update = false): string
1783         {
1784                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1785         }
1786
1787         /**
1788          * Check the given contact array for avatar cache fields
1789          *
1790          * @param array $contact
1791          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1792          * @return array contact array with avatar cache fields
1793          */
1794         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false): array
1795         {
1796                 $update = false;
1797                 $contact_fields = [];
1798                 $fields = ['photo', 'thumb', 'micro'];
1799                 foreach ($fields as $field) {
1800                         if (isset($contact[$field])) {
1801                                 $contact_fields[] = $field;
1802                         }
1803                         if (isset($contact[$field]) && empty($contact[$field])) {
1804                                 $update = true;
1805                         }
1806                 }
1807
1808                 if (!$update || $no_update) {
1809                         return $contact;
1810                 }
1811
1812                 $local = !empty($contact['url']) && Network::isLocalLink($contact['url']);
1813
1814                 if (!$local && !empty($contact['id']) && !empty($contact['avatar'])) {
1815                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1816
1817                         $new_contact = self::getById($contact['id'], $contact_fields);
1818                         if (DBA::isResult($new_contact)) {
1819                                 // We only update the cache fields
1820                                 $contact = array_merge($contact, $new_contact);
1821                         }
1822                 } elseif ($local && !empty($contact['avatar'])) {
1823                         return $contact;
1824                 }
1825
1826                 /// add the default avatars if the fields aren't filled
1827                 if (isset($contact['photo']) && empty($contact['photo'])) {
1828                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1829                 }
1830                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1831                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1832                 }
1833                 if (isset($contact['micro']) && empty($contact['micro'])) {
1834                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1835                 }
1836
1837                 return $contact;
1838         }
1839
1840         /**
1841          * Fetch the default header for the given contact
1842          *
1843          * @param array $contact  contact array
1844          * @return string avatar URL
1845          */
1846         public static function getDefaultHeader(array $contact): string
1847         {
1848                 if (!empty($contact['header'])) {
1849                         return $contact['header'];
1850                 }
1851
1852                 if (!empty($contact['gsid'])) {
1853                         // Use default banners for certain platforms
1854                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1855                         $platform = strtolower($gserver['platform'] ?? '');
1856                 } else {
1857                         $platform = '';
1858                 }
1859
1860                 switch ($platform) {
1861                         case 'friendica':
1862                         case 'friendika':
1863                                 /**
1864                                  * Picture credits
1865                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1866                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1867                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1868                                  */
1869                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1870                                 break;
1871                         case 'diaspora':
1872                                 /**
1873                                  * Picture credits
1874                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1875                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1876                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1877                                  */
1878                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1879                                 break;
1880                         default:
1881                                 /**
1882                                  * Use a random picture.
1883                                  * The service provides random pictures from Unsplash.
1884                                  * @license https://unsplash.com/license
1885                                  */
1886                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1887                                 break;
1888                 }
1889
1890                 return $header;
1891         }
1892
1893         /**
1894          * Fetch the default avatar for the given contact and size
1895          *
1896          * @param array $contact  contact array
1897          * @param string $size    Size of the avatar picture
1898          * @return string avatar URL
1899          */
1900         public static function getDefaultAvatar(array $contact, string $size): string
1901         {
1902                 switch ($size) {
1903                         case Proxy::SIZE_MICRO:
1904                                 $avatar['size'] = 48;
1905                                 $default = self::DEFAULT_AVATAR_MICRO;
1906                                 break;
1907
1908                         case Proxy::SIZE_THUMB:
1909                                 $avatar['size'] = 80;
1910                                 $default = self::DEFAULT_AVATAR_THUMB;
1911                                 break;
1912
1913                         case Proxy::SIZE_SMALL:
1914                         default:
1915                                 $avatar['size'] = 300;
1916                                 $default = self::DEFAULT_AVATAR_PHOTO;
1917                                 break;
1918                 }
1919
1920                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1921                         $platform = '';
1922                         $type     = Contact::TYPE_PERSON;
1923
1924                         if (!empty($contact['id'])) {
1925                                 $account = DBA::selectFirst('account-user-view', ['platform', 'contact-type'], ['id' => $contact['id']]);
1926                                 $platform = $account['platform'] ?? '';
1927                                 $type     = $account['contact-type'] ?? Contact::TYPE_PERSON;
1928                         }
1929
1930                         if (empty($platform) && !empty($contact['uri-id'])) {
1931                                 $account = DBA::selectFirst('account-user-view', ['platform', 'contact-type'], ['uri-id' => $contact['uri-id']]);
1932                                 $platform = $account['platform'] ?? '';
1933                                 $type     = $account['contact-type'] ?? Contact::TYPE_PERSON;
1934                         }
1935
1936                         switch ($platform) {
1937                                 case 'corgidon':
1938                                         /**
1939                                          * Picture credits
1940                                          * @license GNU Affero General Public License v3.0
1941                                          * @link    https://github.com/msdos621/corgidon/blob/main/public/avatars/original/missing.png
1942                                          */
1943                                         $default = '/images/default/corgidon.png';
1944                                         break;
1945
1946                                 case 'diaspora':
1947                                         /**
1948                                          * Picture credits
1949                                          * @license GNU Affero General Public License v3.0
1950                                          * @link    https://github.com/diaspora/diaspora/
1951                                          */
1952                                         $default = '/images/default/diaspora.png';
1953                                         break;
1954
1955                                 case 'gotosocial':
1956                                         /**
1957                                          * Picture credits
1958                                          * @license GNU Affero General Public License v3.0
1959                                          * @link    https://github.com/superseriousbusiness/gotosocial/blob/main/web/assets/default_avatars/GoToSocial_icon1.svg
1960                                          */
1961                                         $default = '/images/default/gotosocial.svg';
1962                                         break;
1963
1964                                 case 'hometown':
1965                                         /**
1966                                          * Picture credits
1967                                          * @license GNU Affero General Public License v3.0
1968                                          * @link    https://github.com/hometown-fork/hometown/blob/hometown-dev/public/avatars/original/missing.png
1969                                          */
1970                                         $default = '/images/default/hometown.png';
1971                                         break;
1972
1973                                 case 'koyuspace':
1974                                         /**
1975                                          * Picture credits
1976                                          * @license GNU Affero General Public License v3.0
1977                                          * @link    https://github.com/koyuspace/mastodon/blob/main/public/avatars/original/missing.png
1978                                          */
1979                                         $default = '/images/default/koyuspace.png';
1980                                         break;
1981
1982                                 case 'ecko':
1983                                 case 'qoto':
1984                                 case 'mastodon':
1985                                         /**
1986                                          * Picture credits
1987                                          * @license GNU Affero General Public License v3.0
1988                                          * @link    https://github.com/mastodon/mastodon/tree/main/public/avatars/original/missing.png
1989                                          */
1990                                         $default = '/images/default/mastodon.png';
1991                                         break;
1992
1993                                 case 'peertube':
1994                                         if ($type == Contact::TYPE_COMMUNITY) {
1995                                                 /**
1996                                                  * Picture credits
1997                                                  * @license GNU Affero General Public License v3.0
1998                                                  * @link    https://github.com/Chocobozzz/PeerTube/blob/develop/client/src/assets/images/default-avatar-video-channel.png
1999                                                  */
2000                                                 $default = '/images/default/peertube-channel.png';
2001                                         } else {
2002                                                 /**
2003                                                  * Picture credits
2004                                                  * @license GNU Affero General Public License v3.0
2005                                                  * @link    https://github.com/Chocobozzz/PeerTube/blob/develop/client/src/assets/images/default-avatar-account.png
2006                                                  */
2007                                                 $default = '/images/default/peertube-account.png';
2008                                         }
2009                                         break;
2010
2011                                 case 'pleroma':
2012                                         /**
2013                                          * Picture credits
2014                                          * @license GNU Affero General Public License v3.0
2015                                          * @link    https://git.pleroma.social/pleroma/pleroma/-/blob/develop/priv/static/images/avi.png
2016                                          */
2017                                         $default = '/images/default/pleroma.png';
2018                                         break;
2019
2020                                 case 'plume':
2021                                         /**
2022                                          * Picture credits
2023                                          * @license GNU Affero General Public License v3.0
2024                                          * @link    https://github.com/Plume-org/Plume/blob/main/assets/images/default-avatar.png
2025                                          */
2026                                         $default = '/images/default/plume.png';
2027                                         break;
2028                         }
2029                         return DI::baseUrl() . $default;
2030                 }
2031
2032                 if (!empty($contact['xmpp'])) {
2033                         $avatar['email'] = $contact['xmpp'];
2034                 } elseif (!empty($contact['addr'])) {
2035                         $avatar['email'] = $contact['addr'];
2036                 } elseif (!empty($contact['url'])) {
2037                         $avatar['email'] = $contact['url'];
2038                 } else {
2039                         return DI::baseUrl() . $default;
2040                 }
2041
2042                 $avatar['url'] = '';
2043                 $avatar['success'] = false;
2044
2045                 Hook::callAll('avatar_lookup', $avatar);
2046
2047                 if ($avatar['success'] && !empty($avatar['url'])) {
2048                         return $avatar['url'];
2049                 }
2050
2051                 return DI::baseUrl() . $default;
2052         }
2053
2054         /**
2055          * Get avatar link for given contact id
2056          *
2057          * @param integer $cid     contact id
2058          * @param string  $size    One of the Proxy::SIZE_* constants
2059          * @param string  $updated Contact update date
2060          * @param bool    $static  If "true" a parameter is added to convert the header to a static one
2061          * @return string avatar link
2062          */
2063         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = '', bool $static = false): string
2064         {
2065                 // We have to fetch the "updated" variable when it wasn't provided
2066                 // The parameter can be provided to improve performance
2067                 if (empty($updated)) {
2068                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
2069                         $updated = $account['updated'] ?? '';
2070                         $guid = $account['guid'] ?? '';
2071                 }
2072
2073                 $guid = urlencode($guid);
2074
2075                 $url = DI::baseUrl() . '/photo/contact/';
2076                 switch ($size) {
2077                         case Proxy::SIZE_MICRO:
2078                                 $url .= Proxy::PIXEL_MICRO . '/';
2079                                 break;
2080                         case Proxy::SIZE_THUMB:
2081                                 $url .= Proxy::PIXEL_THUMB . '/';
2082                                 break;
2083                         case Proxy::SIZE_SMALL:
2084                                 $url .= Proxy::PIXEL_SMALL . '/';
2085                                 break;
2086                         case Proxy::SIZE_MEDIUM:
2087                                 $url .= Proxy::PIXEL_MEDIUM . '/';
2088                                 break;
2089                         case Proxy::SIZE_LARGE:
2090                                 $url .= Proxy::PIXEL_LARGE . '/';
2091                                 break;
2092                 }
2093                 $query_params = [];
2094                 if ($updated) {
2095                         $query_params['ts'] = strtotime($updated);
2096                 }
2097                 if ($static) {
2098                         $query_params['static'] = true;
2099                 }
2100
2101                 return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
2102         }
2103
2104         /**
2105          * Get avatar link for given contact URL
2106          *
2107          * @param string  $url  contact url
2108          * @param integer $uid  user id
2109          * @param string  $size One of the Proxy::SIZE_* constants
2110          * @return string avatar link
2111          */
2112         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''): string
2113         {
2114                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
2115                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
2116                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
2117                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
2118         }
2119
2120         /**
2121          * Get header link for given contact id
2122          *
2123          * @param integer $cid     contact id
2124          * @param string  $size    One of the Proxy::SIZE_* constants
2125          * @param string  $updated Contact update date
2126          * @param bool    $static  If "true" a parameter is added to convert the header to a static one
2127          * @return string header link
2128          */
2129         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = '', bool $static = false): string
2130         {
2131                 // We have to fetch the "updated" variable when it wasn't provided
2132                 // The parameter can be provided to improve performance
2133                 if (empty($updated) || empty($guid)) {
2134                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
2135                         $updated = $account['updated'] ?? '';
2136                         $guid = $account['guid'] ?? '';
2137                 }
2138
2139                 $guid = urlencode($guid);
2140
2141                 $url = DI::baseUrl() . '/photo/header/';
2142                 switch ($size) {
2143                         case Proxy::SIZE_MICRO:
2144                                 $url .= Proxy::PIXEL_MICRO . '/';
2145                                 break;
2146                         case Proxy::SIZE_THUMB:
2147                                 $url .= Proxy::PIXEL_THUMB . '/';
2148                                 break;
2149                         case Proxy::SIZE_SMALL:
2150                                 $url .= Proxy::PIXEL_SMALL . '/';
2151                                 break;
2152                         case Proxy::SIZE_MEDIUM:
2153                                 $url .= Proxy::PIXEL_MEDIUM . '/';
2154                                 break;
2155                         case Proxy::SIZE_LARGE:
2156                                 $url .= Proxy::PIXEL_LARGE . '/';
2157                                 break;
2158                 }
2159
2160                 $query_params = [];
2161                 if ($updated) {
2162                         $query_params['ts'] = strtotime($updated);
2163                 }
2164                 if ($static) {
2165                         $query_params['static'] = true;
2166                 }
2167
2168                 return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
2169         }
2170
2171         /**
2172          * Updates the avatar links in a contact only if needed
2173          *
2174          * @param int    $cid          Contact id
2175          * @param string $avatar       Link to avatar picture
2176          * @param bool   $force        force picture update
2177          * @param bool   $create_cache Enforces the creation of cached avatar fields
2178          *
2179          * @return void
2180          * @throws HTTPException\InternalServerErrorException
2181          * @throws HTTPException\NotFoundException
2182          * @throws \ImagickException
2183          */
2184         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
2185         {
2186                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network', 'uri-id'],
2187                         ['id' => $cid, 'self' => false]);
2188                 if (!DBA::isResult($contact)) {
2189                         return;
2190                 }
2191
2192                 $uid = $contact['uid'];
2193
2194                 // Only update the cached photo links of public contacts when they already are cached
2195                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
2196                         if ($contact['avatar'] != $avatar) {
2197                                 self::update(['avatar' => $avatar], ['id' => $cid]);
2198                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
2199                         }
2200                         return;
2201                 }
2202
2203                 // User contacts use are updated through the public contacts
2204                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2205                         $pcid = self::getIdForURL($contact['url'], 0, false);
2206                         if (!empty($pcid)) {
2207                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
2208                                 self::updateAvatar($pcid, $avatar, $force, true);
2209                                 return;
2210                         }
2211                 }
2212
2213                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
2214
2215                 if ($default_avatar) {
2216                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
2217                 }
2218
2219                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
2220
2221                 // Local contact avatars don't need to be cached
2222                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
2223                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
2224                 }
2225
2226                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
2227                         Avatar::deleteCache($contact);
2228
2229                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
2230                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
2231                                         'photo' => $avatar,
2232                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
2233                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
2234                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
2235                         }
2236
2237                         // Use the data from the self account
2238                         if (empty($fields)) {
2239                                 $local_uid = User::getIdForURL($contact['url']);
2240                                 if (!empty($local_uid)) {
2241                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
2242                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
2243                                 }
2244                         }
2245
2246                         if (empty($fields)) {
2247                                 $update = ($contact['avatar'] != $avatar) || $force;
2248
2249                                 if (!$update) {
2250                                         $data = [
2251                                                 $contact['photo'] ?? '',
2252                                                 $contact['thumb'] ?? '',
2253                                                 $contact['micro'] ?? '',
2254                                         ];
2255
2256                                         foreach ($data as $image_uri) {
2257                                                 $image_rid = Photo::ridFromURI($image_uri);
2258                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
2259                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
2260                                                         $update = true;
2261                                                 }
2262                                         }
2263                                 }
2264
2265                                 if ($update) {
2266                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
2267                                         if ($photos) {
2268                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
2269                                                 $update = !empty($fields);
2270                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
2271                                         } else {
2272                                                 $update = false;
2273                                         }
2274                                 }
2275                         } else {
2276                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
2277                         }
2278                 } else {
2279                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
2280                         $fields = Avatar::fetchAvatarContact($contact, $avatar, $force);
2281                         $update = ($avatar . $fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
2282                 }
2283
2284                 if (!$update) {
2285                         return;
2286                 }
2287
2288                 $cids = [];
2289                 $uids = [];
2290                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2291                         // Collect all user contacts of the given public contact
2292                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
2293                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
2294                         while ($personal_contact = DBA::fetch($personal_contacts)) {
2295                                 $cids[] = $personal_contact['id'];
2296                                 $uids[] = $personal_contact['uid'];
2297                         }
2298                         DBA::close($personal_contacts);
2299
2300                         if (!empty($cids)) {
2301                                 // Delete possibly existing cached user contact avatars
2302                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
2303                         }
2304                 }
2305
2306                 $cids[] = $cid;
2307                 $uids[] = $uid;
2308                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2309                 self::update($fields, ['id' => $cids]);
2310         }
2311
2312         public static function deleteContactByUrl(string $url)
2313         {
2314                 // Update contact data for all users
2315                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2316                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2317                 while ($contact = DBA::fetch($contacts)) {
2318                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2319                         self::remove($contact['id']);
2320                 }
2321         }
2322
2323         /**
2324          * Helper function for "updateFromProbe". Updates personal and public contact
2325          *
2326          * @param integer $id     contact id
2327          * @param integer $uid    user id
2328          * @param integer $uri_id Uri-Id
2329          * @param string  $url    The profile URL of the contact
2330          * @param array   $fields The fields that are updated
2331          *
2332          * @throws \Exception
2333          */
2334         private static function updateContact(int $id, int $uid, int $uri_id, string $url, array $fields)
2335         {
2336                 if (!self::update($fields, ['id' => $id])) {
2337                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2338                         return;
2339                 }
2340
2341                 self::setAccountUser($id, $uid, $uri_id, $url);
2342
2343                 // Archive or unarchive the contact.
2344                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2345                 if (!DBA::isResult($contact)) {
2346                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2347                         return;
2348                 }
2349
2350                 if (isset($fields['failed'])) {
2351                         if ($fields['failed']) {
2352                                 self::markForArchival($contact);
2353                         } else {
2354                                 self::unmarkForArchival($contact);
2355                         }
2356                 }
2357
2358                 if ($contact['uid'] != 0) {
2359                         return;
2360                 }
2361
2362                 // Update contact data for all users
2363                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2364
2365                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2366                 self::update($fields, $condition);
2367
2368                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2369                 $condition['network'] = Protocol::OSTATUS;
2370
2371                 // If the contact failed, propagate the update fields to all contacts
2372                 if (empty($fields['failed'])) {
2373                         unset($fields['last-update']);
2374                         unset($fields['success_update']);
2375                         unset($fields['failure_update']);
2376                 }
2377
2378                 if (empty($fields)) {
2379                         return;
2380                 }
2381
2382                 self::update($fields, $condition);
2383         }
2384
2385         /**
2386          * Create or update an "account-user" entry
2387          *
2388          * @param integer $id
2389          * @param integer $uid
2390          * @param integer $uri_id
2391          * @param string $url
2392          * @return void
2393          */
2394         public static function setAccountUser(int $id, int $uid, int $uri_id, string $url)
2395         {
2396                 if (empty($uri_id)) {
2397                         return;
2398                 }
2399
2400                 $account_user = DBA::selectFirst('account-user', ['id', 'uid', 'uri-id'], ['id' => $id]);
2401                 if (!empty($account_user['uri-id']) && ($account_user['uri-id'] != $uri_id)) {
2402                         if ($account_user['uid'] == $uid) {
2403                                 $ret = DBA::update('account-user', ['uri-id' => $uri_id], ['id' => $id]);
2404                                 Logger::notice('Updated account-user uri-id', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2405                         } else {
2406                                 // This should never happen
2407                                 Logger::warning('account-user exists for a different uri-id and uid', ['account_user' => $account_user, 'id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2408                         }
2409                 }
2410
2411                 $account_user = DBA::selectFirst('account-user', ['id', 'uid', 'uri-id'], ['uid' => $uid, 'uri-id' => $uri_id]);
2412                 if (!empty($account_user['id'])) {
2413                         if ($account_user['id'] == $id) {
2414                                 Logger::debug('account-user already exists', ['id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2415                                 return;
2416                         } elseif (!DBA::exists('contact', ['id' => $account_user['id'], 'deleted' => false])) {
2417                                 $ret = DBA::update('account-user', ['id' => $id], ['uid' => $uid, 'uri-id' => $uri_id]);
2418                                 Logger::notice('Updated account-user', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2419                                 return;
2420                         }
2421                         Logger::warning('account-user exists for a different contact id', ['account_user' => $account_user, 'id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2422                         Worker::add(Worker::PRIORITY_HIGH, 'MergeContact', $account_user['id'], $id, $uid);
2423                 } elseif (DBA::insert('account-user', ['id' => $id, 'uri-id' => $uri_id, 'uid' => $uid], Database::INSERT_IGNORE)) {
2424                         Logger::notice('account-user was added', ['id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2425                 } else {
2426                         Logger::warning('account-user was not added', ['id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2427                 }
2428         }
2429
2430         /**
2431          * Remove duplicated contacts
2432          *
2433          * @param string  $nurl  Normalised contact url
2434          * @param integer $uid   User id
2435          * @return boolean
2436          * @throws \Exception
2437          */
2438         public static function removeDuplicates(string $nurl, int $uid)
2439         {
2440                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2441                 $count = DBA::count('contact', $condition);
2442                 if ($count <= 1) {
2443                         return false;
2444                 }
2445
2446                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2447                 if (!DBA::isResult($first_contact)) {
2448                         // Shouldn't happen - so we handle it
2449                         return false;
2450                 }
2451
2452                 $first = $first_contact['id'];
2453                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2454
2455                 // Find all duplicates
2456                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2457                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2458                 while ($duplicate = DBA::fetch($duplicates)) {
2459                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2460                                 continue;
2461                         }
2462
2463                         Worker::add(Worker::PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2464                 }
2465                 DBA::close($duplicates);
2466                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2467                 return true;
2468         }
2469
2470         /**
2471          * Updates contact record by provided id and optional network
2472          *
2473          * @param integer $id      contact id
2474          * @param string  $network Optional network we are probing for
2475          * @return boolean
2476          * @throws HTTPException\InternalServerErrorException
2477          * @throws \ImagickException
2478          */
2479         public static function updateFromProbe(int $id, string $network = '')
2480         {
2481                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2482                 if (!DBA::isResult($contact)) {
2483                         return false;
2484                 }
2485
2486                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2487
2488                 if ($ret['network'] == Protocol::DIASPORA) {
2489                         FContact::updateFromProbeArray($ret);
2490                 }
2491
2492                 return self::updateFromProbeArray($id, $ret);
2493         }
2494
2495         /**
2496          * Checks if the given contact has got local data
2497          *
2498          * @param int   $id
2499          * @param array $contact
2500          *
2501          * @return boolean
2502          */
2503         private static function hasLocalData(int $id, array $contact): bool
2504         {
2505                 if (!empty($contact['uri-id']) && DBA::exists('contact', ["`uri-id` = ? AND `uid` != ?", $contact['uri-id'], 0])) {
2506                         // User contacts with the same uri-id exist
2507                         return true;
2508                 } elseif (DBA::exists('contact', ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($contact['url']), 0])) {
2509                         // User contacts with the same nurl exists (compatibility mode for systems with missing uri-id values)
2510                         return true;
2511                 }
2512                 if (DBA::exists('post-tag', ['cid' => $id])) {
2513                         // Is tagged in a post
2514                         return true;
2515                 }
2516                 if (DBA::exists('user-contact', ['cid' => $id])) {
2517                         // Has got user-contact data
2518                         return true;
2519                 }
2520                 if (Post::exists(['author-id' => $id])) {
2521                         // Posts with this author exist
2522                         return true;
2523                 }
2524                 if (Post::exists(['owner-id' => $id])) {
2525                         // Posts with this owner exist
2526                         return true;
2527                 }
2528                 if (Post::exists(['causer-id' => $id])) {
2529                         // Posts with this causer exist
2530                         return true;
2531                 }
2532                 // We don't have got this contact locally
2533                 return false;
2534         }
2535
2536         /**
2537          * Updates contact record by provided id and probed data
2538          *
2539          * @param integer $id      contact id
2540          * @param array   $ret     Probed data
2541          * @return boolean
2542          * @throws HTTPException\InternalServerErrorException
2543          * @throws \ImagickException
2544          */
2545         private static function updateFromProbeArray(int $id, array $ret): bool
2546         {
2547                 /*
2548                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2549                   This will reliably kill your communication with old Friendica contacts.
2550                  */
2551
2552                 // These fields aren't updated by this routine:
2553                 // 'sensitive'
2554
2555                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2556                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2557                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix',
2558                         'created', 'last-update'];
2559                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2560                 if (!DBA::isResult($contact)) {
2561                         return false;
2562                 }
2563
2564                 if (self::isLocal($ret['url'])) {
2565                         if ($contact['uid'] == 0) {
2566                                 Logger::info('Local contacts are not updated here.');
2567                         } else {
2568                                 self::updateFromPublicContact($id, $contact);
2569                         }
2570                         return true;
2571                 }
2572
2573                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2574                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2575                         self::remove($id);
2576
2577                         // Delete all contacts with the same URL
2578                         self::deleteContactByUrl($ret['url']);
2579                         return true;
2580                 }
2581
2582                 $uid = $contact['uid'];
2583                 unset($contact['uid']);
2584
2585                 $uriid = $contact['uri-id'];
2586                 unset($contact['uri-id']);
2587
2588                 $pubkey = $contact['pubkey'];
2589                 unset($contact['pubkey']);
2590
2591                 $created = $contact['created'];
2592                 unset($contact['created']);
2593
2594                 $last_update = $contact['last-update'];
2595                 unset($contact['last-update']);
2596
2597                 $contact['photo'] = $contact['avatar'];
2598                 unset($contact['avatar']);
2599
2600                 $updated = DateTimeFormat::utcNow();
2601
2602                 $has_local_data = self::hasLocalData($id, $contact);
2603
2604                 if (!Probe::isProbable($ret['network'])) {
2605                         // Periodical checks are only done on federated contacts
2606                         $failed_next_update  = null;
2607                         $success_next_update = null;
2608                 } elseif ($has_local_data) {
2609                         $failed_next_update  = GServer::getNextUpdateDate(false, $created, $last_update, !in_array($contact['network'], Protocol::FEDERATED));
2610                         $success_next_update = GServer::getNextUpdateDate(true, $created, $last_update, !in_array($contact['network'], Protocol::FEDERATED));
2611                 } else {
2612                         $failed_next_update  = DateTimeFormat::utc('now +6 month');
2613                         $success_next_update = DateTimeFormat::utc('now +1 month');
2614                 }
2615
2616                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2617                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2618                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => true, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $failed_next_update, 'failure_update' => $updated]);
2619                         return false;
2620                 }
2621
2622                 // We must not try to update relay contacts via probe. They are no real contacts.
2623                 // We check after the probing to be able to correct falsely detected contact types.
2624                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2625                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2626                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => false, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $success_next_update, 'success_update' => $updated]);
2627                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2628                         return true;
2629                 }
2630
2631                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2632                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2633                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => true, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $failed_next_update, 'failure_update' => $updated]);
2634                         return false;
2635                 }
2636
2637                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2638                         $cid = self::getIdForURL($ret['url'], 0, false);
2639                         if (!empty($cid) && ($cid != $id)) {
2640                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2641                                 return self::updateFromProbeArray($cid, $ret);
2642                         }
2643                 }
2644
2645                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2646                         $ret['unsearchable'] = $ret['hide'];
2647                 }
2648
2649                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2650                         $ret['forum'] = false;
2651                         $ret['prv'] = false;
2652                         $ret['contact-type'] = $ret['account-type'];
2653                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2654                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2655                                 $ret['prv'] = (bool)!$ret['forum'];
2656                         }
2657                 }
2658
2659                 $new_pubkey = $ret['pubkey'] ?? '';
2660
2661                 if ($uid == 0 && DI::config()->get('system', 'fetch_featured_posts')) {
2662                         if ($ret['network'] == Protocol::ACTIVITYPUB) {
2663                                 $apcontact = APContact::getByURL($ret['url'], false);
2664                                 if (!empty($apcontact['featured'])) {
2665                                         Worker::add(Worker::PRIORITY_LOW, 'FetchFeaturedPosts', $ret['url']);
2666                                 }
2667                         }
2668
2669                         $ret['last-item'] = Probe::getLastUpdate($ret);
2670                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2671                 }
2672
2673                 $update = false;
2674                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2675
2676                 // make sure to not overwrite existing values with blank entries except some technical fields
2677                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2678                 foreach ($ret as $key => $val) {
2679                         if (!array_key_exists($key, $contact)) {
2680                                 unset($ret[$key]);
2681                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2682                                 $ret[$key] = $contact[$key];
2683                         } elseif ($ret[$key] != $contact[$key]) {
2684                                 $update = true;
2685                         }
2686                 }
2687
2688                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2689                         $update = true;
2690                 } else {
2691                         unset($ret['last-item']);
2692                 }
2693
2694                 if (empty($uriid)) {
2695                         $update = true;
2696                 }
2697
2698                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2699                         self::updateAvatar($id, $ret['photo'], $update);
2700                 }
2701
2702                 if (!$update) {
2703                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => false, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $success_next_update, 'success_update' => $updated]);
2704
2705                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2706                                 Worker::add(Worker::PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2707                         }
2708
2709                         // Update the public contact
2710                         if ($uid != 0) {
2711                                 $contact = self::getByURL($ret['url'], false, ['id']);
2712                                 if (!empty($contact['id'])) {
2713                                         self::updateFromProbeArray($contact['id'], $ret);
2714                                 }
2715                         }
2716
2717                         return true;
2718                 }
2719
2720                 $ret['uri-id']      = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2721                 $ret['nurl']        = Strings::normaliseLink($ret['url']);
2722                 $ret['updated']     = $updated;
2723                 $ret['failed']      = false;
2724                 $ret['next-update'] = $success_next_update;
2725                 $ret['local-data']  = $has_local_data;
2726
2727                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2728                 if (empty($pubkey) && !empty($new_pubkey)) {
2729                         $ret['pubkey'] = $new_pubkey;
2730                 }
2731
2732                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2733                         $ret['uri-date'] = $updated;
2734                 }
2735
2736                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2737                         $ret['name-date'] = $updated;
2738                 }
2739
2740                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2741                         $ret['last-update'] = $updated;
2742                         $ret['success_update'] = $updated;
2743                 }
2744
2745                 unset($ret['photo']);
2746
2747                 self::updateContact($id, $uid, $ret['uri-id'], $ret['url'], $ret);
2748
2749                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2750                         Worker::add(Worker::PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2751                 }
2752
2753                 return true;
2754         }
2755
2756         private static function updateFromPublicContact(int $id, array $contact)
2757         {
2758                 $public = self::getByURL($contact['url'], false);
2759
2760                 $fields = [];
2761
2762                 foreach ($contact as $field => $value) {
2763                         if ($field == 'uid') {
2764                                 continue;
2765                         }
2766                         if ($public[$field] != $value) {
2767                                 $fields[$field] = $public[$field];
2768                         }
2769                 }
2770                 if (!empty($fields)) {
2771                         self::update($fields, ['id' => $id, 'self' => false]);
2772                         Logger::info('Updating local contact', ['id' => $id]);
2773                 }
2774         }
2775
2776         /**
2777          * Updates contact record by provided URL
2778          *
2779          * @param integer $url contact url
2780          * @return integer Contact id
2781          * @throws HTTPException\InternalServerErrorException
2782          * @throws \ImagickException
2783          */
2784         public static function updateFromProbeByURL(string $url): int
2785         {
2786                 $id = self::getIdForURL($url);
2787
2788                 if (empty($id)) {
2789                         return $id;
2790                 }
2791
2792                 self::updateFromProbe($id);
2793
2794                 return $id;
2795         }
2796
2797         /**
2798          * Detects the communication protocol for a given contact url.
2799          * This is used to detect Friendica contacts that we can communicate via AP.
2800          *
2801          * @param string $url contact url
2802          * @param string $network Network of that contact
2803          * @return string with protocol
2804          */
2805         public static function getProtocol(string $url, string $network): string
2806         {
2807                 if ($network != Protocol::DFRN) {
2808                         return $network;
2809                 }
2810
2811                 $apcontact = APContact::getByURL($url);
2812                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2813                         return Protocol::ACTIVITYPUB;
2814                 } else {
2815                         return $network;
2816                 }
2817         }
2818
2819         /**
2820          * Takes a $uid and a url/handle and adds a new contact
2821          *
2822          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2823          * dfrn_request page.
2824          *
2825          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2826          *
2827          * Returns an array
2828          * $return['success'] boolean true if successful
2829          * $return['message'] error text if success is false.
2830          *
2831          * Takes a $uid and a url/handle and adds a new contact
2832          *
2833          * @param int    $uid         The user id the contact should be created for
2834          * @param string $url         The profile URL of the contact
2835          * @param string $network
2836          * @return array
2837          * @throws HTTPException\InternalServerErrorException
2838          * @throws HTTPException\NotFoundException
2839          * @throws \ImagickException
2840          */
2841         public static function createFromProbeForUser(int $uid, string $url, string $network = ''): array
2842         {
2843                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2844
2845                 // remove ajax junk, e.g. Twitter
2846                 $url = str_replace('/#!/', '/', $url);
2847
2848                 if (!Network::isUrlAllowed($url)) {
2849                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2850                         return $result;
2851                 }
2852
2853                 if (Network::isUrlBlocked($url)) {
2854                         $result['message'] = DI::l10n()->t('Blocked domain');
2855                         return $result;
2856                 }
2857
2858                 if (!$url) {
2859                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2860                         return $result;
2861                 }
2862
2863                 $arr = ['url' => $url, 'contact' => []];
2864
2865                 Hook::callAll('follow', $arr);
2866
2867                 if (empty($arr)) {
2868                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2869                         return $result;
2870                 }
2871
2872                 if (!empty($arr['contact']['name'])) {
2873                         $probed = false;
2874                         $ret = $arr['contact'];
2875                 } else {
2876                         $probed = true;
2877                         $ret = Probe::uri($url, $network, $uid);
2878
2879                         // Ensure that the public contact exists
2880                         if ($ret['network'] != Protocol::PHANTOM) {
2881                                 self::getIdForURL($url);
2882                         }
2883                 }
2884
2885                 if (($network != '') && ($ret['network'] != $network)) {
2886                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2887                         return $result;
2888                 }
2889
2890                 // check if we already have a contact
2891                 // the poll url is more reliable than the profile url, as we may have
2892                 // indirect links or webfinger links
2893
2894                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2895                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2896                 if (!DBA::isResult($contact)) {
2897                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2898                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2899                 }
2900
2901                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2902
2903                 // This extra param just confuses things, remove it
2904                 if ($protocol === Protocol::DIASPORA) {
2905                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2906                 }
2907
2908                 // do we have enough information?
2909                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2910                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . '<br />';
2911                         if (empty($ret['poll'])) {
2912                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . '<br />';
2913                         }
2914                         if (empty($ret['name'])) {
2915                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . '<br />';
2916                         }
2917                         if (empty($ret['url'])) {
2918                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . '<br />';
2919                         }
2920                         if (strpos($ret['url'], '@') !== false) {
2921                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . '<br />';
2922                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . '<br />';
2923                         }
2924                         return $result;
2925                 }
2926
2927                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2928                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . '<br />';
2929                         $ret['notify'] = '';
2930                 }
2931
2932                 if (!$ret['notify']) {
2933                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . '<br />';
2934                 }
2935
2936                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2937
2938                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2939
2940                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2941
2942                 $pending = false;
2943                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2944                         $pending = (bool)$ret['manually-approve'];
2945                 }
2946
2947                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2948                         $writeable = 1;
2949                 }
2950
2951                 if (DBA::isResult($contact)) {
2952                         // update contact
2953                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2954
2955                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2956                         self::update($fields, ['id' => $contact['id']]);
2957                 } else {
2958                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2959
2960                         // create contact record
2961                         self::insert([
2962                                 'uid'     => $uid,
2963                                 'created' => DateTimeFormat::utcNow(),
2964                                 'url'     => $ret['url'],
2965                                 'nurl'    => Strings::normaliseLink($ret['url']),
2966                                 'addr'    => $ret['addr'],
2967                                 'alias'   => $ret['alias'],
2968                                 'batch'   => $ret['batch'],
2969                                 'notify'  => $ret['notify'],
2970                                 'poll'    => $ret['poll'],
2971                                 'poco'    => $ret['poco'],
2972                                 'name'    => $ret['name'],
2973                                 'nick'    => $ret['nick'],
2974                                 'network' => $ret['network'],
2975                                 'baseurl' => $ret['baseurl'],
2976                                 'gsid'    => $ret['gsid'] ?? null,
2977                                 'protocol' => $protocol,
2978                                 'pubkey'  => $ret['pubkey'],
2979                                 'rel'     => $new_relation,
2980                                 'priority'=> $ret['priority'],
2981                                 'writable'=> $writeable,
2982                                 'hidden'  => $hidden,
2983                                 'blocked' => 0,
2984                                 'readonly'=> 0,
2985                                 'pending' => $pending,
2986                                 'subhub'  => $subhub
2987                         ]);
2988                 }
2989
2990                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2991                 if (!DBA::isResult($contact)) {
2992                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . '<br />';
2993                         return $result;
2994                 }
2995
2996                 $contact_id = $contact['id'];
2997                 $result['cid'] = $contact_id;
2998
2999                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
3000
3001                 // Update the avatar
3002                 self::updateAvatar($contact_id, $ret['photo']);
3003
3004                 // pull feed and consume it, which should subscribe to the hub.
3005                 if ($contact['network'] == Protocol::OSTATUS) {
3006                         Worker::add(Worker::PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
3007                 }
3008
3009                 if ($probed) {
3010                         self::updateFromProbeArray($contact_id, $ret);
3011                 } else {
3012                         Worker::add(Worker::PRIORITY_HIGH, 'UpdateContact', $contact_id);
3013                 }
3014
3015                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
3016
3017                 return $result;
3018         }
3019
3020         /**
3021          * @param array  $importer Owner (local user) data
3022          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
3023          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
3024          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
3025          * @param string $note     Introduction additional message
3026          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
3027          * @throws HTTPException\InternalServerErrorException
3028          * @throws \ImagickException
3029          */
3030         public static function addRelationship(array $importer, array $contact, array $datarray, bool $sharing = false, string $note = '')
3031         {
3032                 // Should always be set
3033                 if (empty($datarray['author-id'])) {
3034                         return false;
3035                 }
3036
3037                 $fields = ['id', 'url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
3038                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
3039                 if (!DBA::isResult($pub_contact)) {
3040                         // Should never happen
3041                         return false;
3042                 }
3043
3044                 // Contact is blocked at node-level
3045                 if (self::isBlocked($datarray['author-id'])) {
3046                         return false;
3047                 }
3048
3049                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
3050                 $name = $pub_contact['name'];
3051                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
3052                 $nick = $pub_contact['nick'];
3053                 $network = $pub_contact['network'];
3054
3055                 // Ensure that we don't create a new contact when there already is one
3056                 $cid = self::getIdForURL($url, $importer['uid']);
3057                 if (!empty($cid)) {
3058                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
3059                 }
3060
3061                 self::clearFollowerFollowingEndpointCache($importer['uid']);
3062
3063                 if (!empty($contact)) {
3064                         if (!empty($contact['pending'])) {
3065                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
3066                                 return null;
3067                         }
3068
3069                         // Contact is blocked at user-level
3070                         if (!empty($contact['id']) && !empty($importer['id']) &&
3071                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
3072                                 return false;
3073                         }
3074
3075                         // Make sure that the existing contact isn't archived
3076                         self::unmarkForArchival($contact);
3077
3078                         if (($contact['rel'] == self::SHARING)
3079                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
3080                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
3081                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
3082                         }
3083
3084                         // Ensure to always have the correct network type, independent from the connection request method
3085                         self::updateFromProbe($contact['id']);
3086
3087                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
3088
3089                         return true;
3090                 } else {
3091                         // send email notification to owner?
3092                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
3093                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
3094                                 return null;
3095                         }
3096
3097                         // create contact record
3098                         $contact_id = self::insert([
3099                                 'uid'      => $importer['uid'],
3100                                 'created'  => DateTimeFormat::utcNow(),
3101                                 'url'      => $url,
3102                                 'nurl'     => Strings::normaliseLink($url),
3103                                 'name'     => $name,
3104                                 'nick'     => $nick,
3105                                 'network'  => $network,
3106                                 'rel'      => self::FOLLOWER,
3107                                 'blocked'  => 0,
3108                                 'readonly' => 0,
3109                                 'pending'  => 1,
3110                                 'writable' => 1,
3111                         ]);
3112
3113                         // Ensure to always have the correct network type, independent from the connection request method
3114                         self::updateFromProbe($contact_id);
3115
3116                         self::updateAvatar($contact_id, $photo, true);
3117
3118                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
3119
3120                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
3121
3122                         /// @TODO Encapsulate this into a function/method
3123                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
3124                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
3125                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
3126                                 // create notification
3127                                 if (is_array($contact_record)) {
3128                                         $intro = DI::introFactory()->createNew(
3129                                                 $importer['uid'],
3130                                                 $contact_record['id'],
3131                                                 $note
3132                                         );
3133                                         DI::intro()->save($intro);
3134                                 }
3135
3136                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
3137
3138                                 if (($user['notify-flags'] & Notification\Type::INTRO) && $user['page-flags'] == User::PAGE_FLAGS_NORMAL) {
3139                                         DI::notify()->createFromArray([
3140                                                 'type'  => Notification\Type::INTRO,
3141                                                 'otype' => Notification\ObjectType::INTRO,
3142                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
3143                                                 'uid'   => $user['uid'],
3144                                                 'cid'   => $contact_record['id'],
3145                                                 'link'  => DI::baseUrl() . '/notifications/intros',
3146                                         ]);
3147                                 }
3148                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
3149                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
3150                                         self::createFromProbeForUser($importer['uid'], $url, $network);
3151                                 }
3152
3153                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
3154                                 $fields = ['pending' => false];
3155                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
3156                                         $fields['rel'] = self::FRIEND;
3157                                 }
3158
3159                                 self::update($fields, $condition);
3160
3161                                 return true;
3162                         }
3163                 }
3164
3165                 return null;
3166         }
3167
3168         /**
3169          * Update the local relationship when a local user loses a follower
3170          *
3171          * @param array $contact User-specific contact (uid != 0) array
3172          * @return void
3173          * @throws HTTPException\InternalServerErrorException
3174          * @throws \ImagickException
3175          */
3176         public static function removeFollower(array $contact)
3177         {
3178                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
3179                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
3180                 } elseif (!empty($contact['id'])) {
3181                         self::remove($contact['id']);
3182                 } else {
3183                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
3184                         return;
3185                 }
3186
3187                 Worker::add(Worker::PRIORITY_LOW, 'ContactDiscoveryForUser', $contact['uid']);
3188
3189                 self::clearFollowerFollowingEndpointCache($contact['uid']);
3190
3191                 $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
3192
3193                 DI::notification()->deleteForUserByVerb($contact['uid'], Activity::FOLLOW, ['actor-id' => $cdata['public']]);
3194         }
3195
3196         /**
3197          * Update the local relationship when a local user unfollow a contact.
3198          * Removes the contact for sharing-only protocols (feed and mail).
3199          *
3200          * @param array $contact User-specific contact (uid != 0) array
3201          * @throws HTTPException\InternalServerErrorException
3202          */
3203         public static function removeSharer(array $contact)
3204         {
3205                 self::clearFollowerFollowingEndpointCache($contact['uid']);
3206
3207                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
3208                         self::remove($contact['id']);
3209                 } else {
3210                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
3211                 }
3212
3213                 Worker::add(Worker::PRIORITY_LOW, 'ContactDiscoveryForUser', $contact['uid']);
3214         }
3215
3216         /**
3217          * Create a birthday event.
3218          *
3219          * Update the year and the birthday.
3220          */
3221         public static function updateBirthdays()
3222         {
3223                 $condition = [
3224                         '`bd` > ?
3225                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
3226                         AND NOT `contact`.`pending`
3227                         AND NOT `contact`.`hidden`
3228                         AND NOT `contact`.`blocked`
3229                         AND NOT `contact`.`archive`
3230                         AND NOT `contact`.`deleted`',
3231                         DBA::NULL_DATE,
3232                         self::SHARING,
3233                         self::FRIEND
3234                 ];
3235
3236                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
3237
3238                 while ($contact = DBA::fetch($contacts)) {
3239                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
3240
3241                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
3242
3243                         if (Event::createBirthday($contact, $nextbd)) {
3244                                 // update bdyear
3245                                 DBA::update(
3246                                         'contact',
3247                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
3248                                         ['id' => $contact['id']]
3249                                 );
3250                         }
3251                 }
3252                 DBA::close($contacts);
3253         }
3254
3255         /**
3256          * Remove the unavailable contact ids from the provided list
3257          *
3258          * @param array $contact_ids Contact id list
3259          * @return array
3260          * @throws \Exception
3261          */
3262         public static function pruneUnavailable(array $contact_ids): array
3263         {
3264                 if (empty($contact_ids)) {
3265                         return [];
3266                 }
3267
3268                 $contacts = self::selectToArray(['id'], [
3269                         'id'      => $contact_ids,
3270                         'blocked' => false,
3271                         'pending' => false,
3272                         'archive' => false,
3273                 ]);
3274
3275                 return array_column($contacts, 'id');
3276         }
3277
3278         /**
3279          * Returns a magic link to authenticate remote visitors
3280          *
3281          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
3282          *
3283          * @param string $contact_url The address of the target contact profile
3284          * @param string $url         An url that we will be redirected to after the authentication
3285          *
3286          * @return string with "redir" link
3287          * @throws HTTPException\InternalServerErrorException
3288          * @throws \ImagickException
3289          */
3290         public static function magicLink(string $contact_url, string $url = ''): string
3291         {
3292                 if (!DI::userSession()->isAuthenticated()) {
3293                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
3294                 }
3295
3296                 $contact = self::getByURL($contact_url, false);
3297                 if (empty($contact)) {
3298                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
3299                 }
3300
3301                 // Prevents endless loop in case only a non-public contact exists for the contact URL
3302                 unset($contact['uid']);
3303
3304                 return self::magicLinkByContact($contact, $url ?: $contact_url);
3305         }
3306
3307         /**
3308          * Returns a magic link to authenticate remote visitors
3309          *
3310          * @param integer $cid The contact id of the target contact profile
3311          * @param string  $url An url that we will be redirected to after the authentication
3312          *
3313          * @return string with "redir" link
3314          * @throws HTTPException\InternalServerErrorException
3315          * @throws \ImagickException
3316          */
3317         public static function magicLinkById(int $cid, string $url = ''): string
3318         {
3319                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
3320
3321                 return self::magicLinkByContact($contact, $url);
3322         }
3323
3324         /**
3325          * Returns a magic link to authenticate remote visitors
3326          *
3327          * @param array  $contact The contact array with "uid", "network" and "url"
3328          * @param string $url     An url that we will be redirected to after the authentication
3329          *
3330          * @return string with "redir" link
3331          * @throws HTTPException\InternalServerErrorException
3332          * @throws \ImagickException
3333          */
3334         public static function magicLinkByContact(array $contact, string $url = ''): string
3335         {
3336                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
3337
3338                 if (!DI::userSession()->isAuthenticated()) {
3339                         return $destination;
3340                 }
3341
3342                 // Only redirections to the same host do make sense
3343                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
3344                         return $url;
3345                 }
3346
3347                 if (DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'stay_local') && ($url == '')) {
3348                         return 'contact/' . $contact['id'] . '/conversations';
3349                 }
3350
3351                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
3352                         return $destination;
3353                 }
3354
3355                 if (empty($contact['id'])) {
3356                         return $destination;
3357                 }
3358
3359                 $redirect = 'contact/redir/' . $contact['id'];
3360
3361                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
3362                         $redirect .= '?url=' . $url;
3363                 }
3364
3365                 return $redirect;
3366         }
3367
3368         /**
3369          * Is the contact a forum?
3370          *
3371          * @param integer $contactid ID of the contact
3372          *
3373          * @return boolean "true" if it is a forum
3374          */
3375         public static function isForum(int $contactid): bool
3376         {
3377                 $fields = ['contact-type'];
3378                 $condition = ['id' => $contactid];
3379                 $contact = DBA::selectFirst('contact', $fields, $condition);
3380                 if (!DBA::isResult($contact)) {
3381                         return false;
3382                 }
3383
3384                 // Is it a forum?
3385                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
3386         }
3387
3388         /**
3389          * Can the remote contact receive private messages?
3390          *
3391          * @param array $contact
3392          * @return bool
3393          */
3394         public static function canReceivePrivateMessages(array $contact): bool
3395         {
3396                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
3397                 $self = $contact['self'] ?? false;
3398
3399                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
3400         }
3401
3402         /**
3403          * Search contact table by nick or name
3404          *
3405          * @param string $search Name or nick
3406          * @param string $mode   Search mode (e.g. "community")
3407          * @param int    $uid    User ID
3408          * @param int    $limit  Maximum amount of returned values
3409          * @param int    $offset Limit offset
3410          *
3411          * @return array with search results
3412          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3413          */
3414         public static function searchByName(string $search, string $mode = '', int $uid = 0, int $limit = 0, int $offset = 0): array
3415         {
3416                 if (empty($search)) {
3417                         return [];
3418                 }
3419
3420                 // check supported networks
3421                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
3422                 if (DI::config()->get('system', 'diaspora_enabled')) {
3423                         $networks[] = Protocol::DIASPORA;
3424                 }
3425
3426                 if (!DI::config()->get('system', 'ostatus_disabled')) {
3427                         $networks[] = Protocol::OSTATUS;
3428                 }
3429
3430                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
3431
3432                 if ($uid == 0) {
3433                         $condition['blocked'] = false;
3434                 } else {
3435                         $condition['rel'] = [Contact::SHARING, Contact::FRIEND];
3436                 }
3437
3438                 // check if we search only communities or every contact
3439                 if ($mode === 'community') {
3440                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3441                 }
3442
3443                 $search .= '%';
3444
3445                 $params = [];
3446
3447                 if (!empty($limit) && !empty($offset)) {
3448                         $params['limit'] = [$offset, $limit];
3449                 } elseif (!empty($limit)) {
3450                         $params['limit'] = $limit;
3451                 }
3452
3453                 $condition = DBA::mergeConditions($condition,
3454                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3455                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3456
3457                 return self::selectToArray([], $condition, $params);
3458         }
3459
3460         /**
3461          * Add public contacts from an array
3462          *
3463          * @param array $urls
3464          * @return array result "count", "added" and "updated"
3465          */
3466         public static function addByUrls(array $urls): array
3467         {
3468                 $added = 0;
3469                 $updated = 0;
3470                 $unchanged = 0;
3471                 $count = 0;
3472
3473                 foreach ($urls as $url) {
3474                         if (empty($url) || !is_string($url)) {
3475                                 continue;
3476                         }
3477                         $contact = self::getByURL($url, false, ['id', 'network', 'next-update']);
3478                         if (empty($contact['id']) && Network::isValidHttpUrl($url)) {
3479                                 Worker::add(Worker::PRIORITY_LOW, 'AddContact', 0, $url);
3480                                 ++$added;
3481                         } elseif (!empty($contact['network']) && Probe::isProbable($contact['network']) && ($contact['next-update'] < DateTimeFormat::utcNow())) {
3482                                 Worker::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], 'UpdateContact', $contact['id']);
3483                                 ++$updated;
3484                         } else {
3485                                 ++$unchanged;
3486                         }
3487                         ++$count;
3488                 }
3489
3490                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3491         }
3492
3493         /**
3494          * Returns a random, global contact array of the current node
3495          *
3496          * @return array The profile array
3497          * @throws Exception
3498          */
3499         public static function getRandomContact(): array
3500         {
3501                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3502                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3503                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3504                 ], ['order' => ['RAND()']]);
3505
3506                 if (DBA::isResult($contact)) {
3507                         return $contact;
3508                 }
3509
3510                 return [];
3511         }
3512
3513         /**
3514          * Checks, if contacts with the given condition exists
3515          *
3516          * @param array $condition
3517          *
3518          * @return bool
3519          * @throws \Exception
3520          */
3521         public static function exists(array $condition): bool
3522         {
3523                 return DBA::exists('contact', $condition);
3524         }
3525 }