src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, 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\Header;
  26 use Friendica\Contact\Introduction\Exception\IntroductionNotFoundException;
  27 use Friendica\Contact\LocalRelationship\Entity\LocalRelationship;
  28 use Friendica\Content\Conversation as ConversationContent;
  29 use Friendica\Content\Pager;
  30 use Friendica\Content\Text\HTML;
  31 use Friendica\Core\Hook;
  32 use Friendica\Core\Logger;
  33 use Friendica\Core\Protocol;
  34 use Friendica\Core\Renderer;
  35 use Friendica\Core\System;
  36 use Friendica\Core\Worker;
  37 use Friendica\Database\Database;
  38 use Friendica\Database\DBA;
  39 use Friendica\DI;
  40 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
  41 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
  42 use Friendica\Network\HTTPException;
  43 use Friendica\Network\Probe;
  44 use Friendica\Object\Image;
  45 use Friendica\Protocol\Activity;
  46 use Friendica\Protocol\ActivityPub;
  47 use Friendica\Util\DateTimeFormat;
  48 use Friendica\Util\HTTPSignature;
  49 use Friendica\Util\Images;
  50 use Friendica\Util\Network;
  51 use Friendica\Util\Proxy;
  52 use Friendica\Util\Strings;
  53 use Friendica\Worker\UpdateContact;
  54
  55 /**
  56  * functions for interacting with a contact
  57  */
  58 class Contact
  59 {
  60         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  61         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  62         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  63
  64         /**
  65          * @}
  66          */
  67
  68         const LOCK_INSERT = 'contact-insert';
  69
  70         /**
  71          * Account types
  72          *
  73          * TYPE_UNKNOWN - unknown type
  74          *
  75          * TYPE_PERSON - the account belongs to a person
  76          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  77          *
  78          * TYPE_ORGANISATION - the account belongs to an organisation
  79          *      Associated page type: PAGE_SOAPBOX
  80          *
  81          * TYPE_NEWS - the account is a news reflector
  82          *      Associated page type: PAGE_SOAPBOX
  83          *
  84          * TYPE_COMMUNITY - the account is community group
  85          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
  86          *
  87          * TYPE_RELAY - the account is a relay
  88          *      This will only be assigned to contacts, not to user accounts
  89          * @{
  90          */
  91         const TYPE_UNKNOWN =     -1;
  92         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
  93         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
  94         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
  95         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
  96         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
  97         /**
  98          * @}
  99          */
 100
 101         /**
 102          * Contact_is
 103          *
 104          * Relationship types
 105          * @{
 106          */
 107         const NOTHING  = 0; // There is no relationship between the contact and the user
 108         const FOLLOWER = 1; // The contact is following this user (the contact is the subscriber)
 109         const SHARING  = 2; // The contact shares their content with this user (the user is the subscriber)
 110         const FRIEND   = 3; // There is a mutual relationship between the contact and the user
 111         const SELF     = 4; // This is the user theirself
 112         /**
 113          * @}
 114          */
 115
 116         /** @deprecated Use Entity\LocalRelationship::MIRROR_DEACTIVATED instead */
 117         const MIRROR_DEACTIVATED = LocalRelationship::MIRROR_DEACTIVATED;
 118         /** @deprecated Now does the same as MIRROR_OWN_POST */
 119         const MIRROR_FORWARDED = 1;
 120         /** @deprecated Use Entity\LocalRelationship::MIRROR_OWN_POST instead */
 121         const MIRROR_OWN_POST = LocalRelationship::MIRROR_OWN_POST;
 122         /** @deprecated Use Entity\LocalRelationship::MIRROR_NATIVE_RESHARE instead */
 123         const MIRROR_NATIVE_RESHARE = LocalRelationship::MIRROR_NATIVE_RESHARE;
 124
 125         /**
 126          * @param array $fields    Array of selected fields, empty for all
 127          * @param array $condition Array of fields for condition
 128          * @param array $params    Array of several parameters
 129          * @return array
 130          * @throws \Exception
 131          */
 132         public static function selectToArray(array $fields = [], array $condition = [], array $params = []): array
 133         {
 134                 return DBA::selectToArray('contact', $fields, $condition, $params);
 135         }
 136
 137         /**
 138          * @param array $fields    Array of selected fields, empty for all
 139          * @param array $condition Array of fields for condition
 140          * @param array $params    Array of several parameters
 141          * @return array|bool
 142          * @throws \Exception
 143          */
 144         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 145         {
 146                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 147
 148                 return $contact;
 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
 156          * @throws \Exception
 157          */
 158         public static function selectAccountToArray(array $fields = [], array $condition = [], array $params = []): array
 159         {
 160                 return DBA::selectToArray('account-user-view', $fields, $condition, $params);
 161         }
 162
 163         /**
 164          * @param array $fields    Array of selected fields, empty for all
 165          * @param array $condition Array of fields for condition
 166          * @param array $params    Array of several parameters
 167          * @return array|bool
 168          * @throws \Exception
 169          */
 170         public static function selectFirstAccount(array $fields = [], array $condition = [], array $params = [])
 171         {
 172                 return DBA::selectFirst('account-view', $fields, $condition, $params);
 173         }
 174
 175         /**
 176          * Insert a row into the contact table
 177          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 178          *
 179          * @param array $fields         field array
 180          * @param int   $duplicate_mode Do an update on a duplicate entry
 181          *
 182          * @return int  id of the created contact
 183          * @throws \Exception
 184          */
 185         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT): int
 186         {
 187                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 188                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 189                 }
 190
 191                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 192
 193                 if (empty($fields['created'])) {
 194                         $fields['created'] = DateTimeFormat::utcNow();
 195                 }
 196
 197                 $fields = DI::dbaDefinition()->truncateFieldsForTable('contact', $fields);
 198                 DBA::insert('contact', $fields, $duplicate_mode);
 199                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 200                 if (!DBA::isResult($contact)) {
 201                         // Shouldn't happen
 202                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 203                         return 0;
 204                 }
 205
 206                 $fields = DI::dbaDefinition()->truncateFieldsForTable('account-user', $contact);
 207                 DBA::insert('account-user', $fields, Database::INSERT_IGNORE);
 208                 $account_user = DBA::selectFirst('account-user', ['id'], ['uid' => $contact['uid'], 'uri-id' => $contact['uri-id']]);
 209                 if (empty($account_user['id'])) {
 210                         Logger::warning('Account-user entry not found', ['cid' => $contact['id'], 'uid' => $contact['uid'], 'uri-id' => $contact['uri-id'], 'url' => $contact['url']]);
 211                 } elseif ($account_user['id'] != $contact['id']) {
 212                         $duplicate = DBA::selectFirst('contact', [], ['id' => $account_user['id'], 'deleted' => false]);
 213                         if (!empty($duplicate['id'])) {
 214                                 $ret = Contact::deleteById($contact['id']);
 215                                 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']]);
 216                                 $contact = $duplicate;
 217                         } else {
 218                                 $ret = DBA::update('account-user', ['id' => $contact['id']], ['uid' => $contact['uid'], 'uri-id' => $contact['uri-id']]);
 219                                 Logger::notice('Updated account-user', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $contact['id'], 'uid' => $contact['uid'], 'uri-id' => $contact['uri-id'], 'url' => $contact['url']]);
 220                         }
 221                 }
 222
 223                 Contact\User::insertForContactArray($contact);
 224
 225                 if ((empty($contact['baseurl']) || empty($contact['gsid'])) && Probe::isProbable($contact['network'])) {
 226                         Logger::debug('Update missing baseurl', ['id' => $contact['id'], 'url' => $contact['url'], 'callstack' => System::callstack(4, 0, true)]);
 227                         UpdateContact::add(['priority' => Worker::PRIORITY_MEDIUM, 'dont_fork' => true], $contact['id']);
 228                 }
 229
 230                 return $contact['id'];
 231         }
 232
 233         /**
 234          * Delete contact by id
 235          *
 236          * @param integer $id
 237          * @return boolean
 238          */
 239         public static function deleteById(int $id): bool
 240         {
 241                 Logger::debug('Delete contact', ['id' => $id]);
 242                 DBA::delete('account-user', ['id' => $id]);
 243                 return DBA::delete('contact', ['id' => $id]);
 244         }
 245
 246         /**
 247          * Updates rows in the contact table
 248          *
 249          * @param array         $fields     contains the fields that are updated
 250          * @param array         $condition  condition array with the key values
 251          * @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)
 252          *
 253          * @return boolean was the update successful?
 254          * @throws \Exception
 255          * @todo Let's get rid of boolean type of $old_fields
 256          */
 257         public static function update(array $fields, array $condition, $old_fields = []): bool
 258         {
 259                 // Apply changes to the "user-contact" table on dedicated fields
 260                 Contact\User::updateByContactUpdate($fields, $condition);
 261
 262                 $fields = DI::dbaDefinition()->truncateFieldsForTable('contact', $fields);
 263                 return DBA::update('contact', $fields, $condition, $old_fields);
 264         }
 265
 266         /**
 267          * @param integer $id     Contact ID
 268          * @param array   $fields Array of selected fields, empty for all
 269          * @return array|boolean Contact record if it exists, false otherwise
 270          * @throws \Exception
 271          */
 272         public static function getById(int $id, array $fields = [])
 273         {
 274                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 275         }
 276
 277         /**
 278          * Fetch the first contact with the provided uri-id.
 279          *
 280          * @param integer $uri_id uri-id of the contact
 281          * @param array   $fields Array of selected fields, empty for all
 282          * @return array|boolean Contact record if it exists, false otherwise
 283          * @throws \Exception
 284          */
 285         public static function getByUriId(int $uri_id, array $fields = [])
 286         {
 287                 return DBA::selectFirst('contact', $fields, ['uri-id' => $uri_id], ['order' => ['uid']]);
 288         }
 289
 290         /**
 291          * Fetch all remote contacts for a given contact url
 292          *
 293          * @param string $url The URL of the contact
 294          * @param array  $fields The wanted fields
 295          *
 296          * @return array all remote contacts
 297          *
 298          * @throws \Exception
 299          */
 300         public static function getVisitorByUrl(string $url, array $fields = ['id', 'uid']): array
 301         {
 302                 $remote = [];
 303
 304                 $remote_contacts = DBA::select('contact', ['id', 'uid'], ['nurl' => Strings::normaliseLink($url), 'rel' => [Contact::FOLLOWER, Contact::FRIEND], 'self' => false]);
 305                 while ($contact = DBA::fetch($remote_contacts)) {
 306                         if (($contact['uid'] == 0) || Contact\User::isBlocked($contact['id'], $contact['uid'])) {
 307                                 continue;
 308                         }
 309                         $remote[$contact['uid']] = $contact['id'];
 310                 }
 311                 DBA::close($remote_contacts);
 312
 313                 return $remote;
 314         }
 315
 316         /**
 317          * Fetches a contact by a given url
 318          *
 319          * @param string  $url    profile url
 320          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 321          * @param array   $fields Field list
 322          * @param integer $uid    User ID of the contact
 323          * @return array contact array
 324          */
 325         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0): array
 326         {
 327                 if ($update || is_null($update)) {
 328                         $cid = self::getIdForURL($url, $uid, $update);
 329                         if (empty($cid)) {
 330                                 return [];
 331                         }
 332
 333                         $contact = self::getById($cid, $fields);
 334                         if (empty($contact)) {
 335                                 return [];
 336                         }
 337                         return $contact;
 338                 }
 339
 340                 // Add internal fields
 341                 $removal = [];
 342                 if (!empty($fields)) {
 343                         foreach (['id', 'next-update', 'network', 'local-data'] as $internal) {
 344                                 if (!in_array($internal, $fields)) {
 345                                         $fields[] = $internal;
 346                                         $removal[] = $internal;
 347                                 }
 348                         }
 349                 }
 350
 351                 // We first try the nurl (http://server.tld/nick), most common case
 352                 $options = ['order' => ['id']];
 353                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 354
 355                 // Then the addr (nick@server.tld)
 356                 if (!DBA::isResult($contact)) {
 357                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 358                 }
 359
 360                 // Then the alias (which could be anything)
 361                 if (!DBA::isResult($contact)) {
 362                         // The link could be provided as http although we stored it as https
 363                         $ssl_url = str_replace('http://', 'https://', $url);
 364                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 365                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 366                 }
 367
 368                 if (!DBA::isResult($contact)) {
 369                         return [];
 370                 }
 371
 372                 $background_update = DI::config()->get('system', 'update_active_contacts') ? $contact['local-data'] : true;
 373
 374                 // Update the contact in the background if needed
 375                 if ($background_update && !self::isLocal($url) && Protocol::supportsProbe($contact['network']) && ($contact['next-update'] < DateTimeFormat::utcNow())) {
 376                         try {
 377                                 UpdateContact::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], $contact['id']);
 378                         } catch (\InvalidArgumentException $e) {
 379                                 Logger::notice($e->getMessage(), ['contact' => $contact]);
 380                         }
 381                 }
 382
 383                 // Remove the internal fields
 384                 foreach ($removal as $internal) {
 385                         unset($contact[$internal]);
 386                 }
 387
 388                 return $contact;
 389         }
 390
 391         /**
 392          * Fetches a contact for a given user by a given url.
 393          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 394          *
 395          * @param string  $url    profile url
 396          * @param integer $uid    User ID of the contact
 397          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 398          * @param array   $fields Field list
 399          * @return array contact array
 400          */
 401         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = []): array
 402         {
 403                 if ($uid != 0) {
 404                         $contact = self::getByURL($url, $update, $fields, $uid);
 405                         if (!empty($contact)) {
 406                                 if (!empty($contact['id'])) {
 407                                         $contact['cid'] = $contact['id'];
 408                                         $contact['zid'] = 0;
 409                                 }
 410                                 return $contact;
 411                         }
 412                 }
 413
 414                 $contact = self::getByURL($url, $update, $fields);
 415                 if (!empty($contact['id'])) {
 416                         $contact['cid'] = 0;
 417                         $contact['zid'] = $contact['id'];
 418                 }
 419                 return $contact;
 420         }
 421
 422         /**
 423          * Checks if a contact uses a specific platform
 424          *
 425          * @param string $url
 426          * @param string $platform
 427          * @return boolean
 428          */
 429         public static function isPlatform(string $url, string $platform): bool
 430         {
 431                 return DBA::exists('account-view', ['nurl' => Strings::normaliseLink($url), 'platform' => $platform]);
 432         }
 433
 434         /**
 435          * Tests if the given contact is a follower
 436          *
 437          * @param int  $cid    Either public contact id or user's contact id
 438          * @param int  $uid    User ID
 439          * @param bool $strict If "true" then contact mustn't be set to pending or readonly
 440          *
 441          * @return boolean is the contact id a follower?
 442          * @throws HTTPException\InternalServerErrorException
 443          * @throws \ImagickException
 444          */
 445         public static function isFollower(int $cid, int $uid, bool $strict = false): bool
 446         {
 447                 if (Contact\User::isBlocked($cid, $uid)) {
 448                         return false;
 449                 }
 450
 451                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 452                 if (empty($cdata['user'])) {
 453                         return false;
 454                 }
 455
 456                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 457                 if ($strict) {
 458                         $condition = array_merge($condition, ['pending' => false, 'readonly' => false, 'blocked' => false]);
 459                 }
 460                 return DBA::exists('contact', $condition);
 461         }
 462
 463         /**
 464          * Tests if the given contact url is a follower
 465          *
 466          * @param string $url    Contact URL
 467          * @param int    $uid    User ID
 468          * @param bool   $strict If "true" then contact mustn't be set to pending or readonly
 469          *
 470          * @return boolean is the contact id a follower?
 471          * @throws HTTPException\InternalServerErrorException
 472          * @throws \ImagickException
 473          */
 474         public static function isFollowerByURL(string $url, int $uid, bool $strict = false): bool
 475         {
 476                 $cid = self::getIdForURL($url, $uid);
 477
 478                 if (empty($cid)) {
 479                         return false;
 480                 }
 481
 482                 return self::isFollower($cid, $uid, $strict);
 483         }
 484
 485         /**
 486          * Tests if the given user shares with the given contact
 487          *
 488          * @param int  $cid    Either public contact id or user's contact id
 489          * @param int  $uid    User ID
 490          * @param bool $strict If "true" then contact mustn't be set to pending or readonly
 491          *
 492          * @return boolean is the contact sharing with given user?
 493          * @throws HTTPException\InternalServerErrorException
 494          * @throws \ImagickException
 495          */
 496         public static function isSharing(int $cid, int $uid, bool $strict = false): bool
 497         {
 498                 if (Contact\User::isBlocked($cid, $uid)) {
 499                         return false;
 500                 }
 501
 502                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 503                 if (empty($cdata['user'])) {
 504                         return false;
 505                 }
 506
 507                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 508                 if ($strict) {
 509                         $condition = array_merge($condition, ['pending' => false, 'readonly' => false, 'blocked' => false]);
 510                 }
 511                 return DBA::exists('contact', $condition);
 512         }
 513
 514         /**
 515          * Tests if the given user follow the given contact url
 516          *
 517          * @param string $url    Contact URL
 518          * @param int    $uid    User ID
 519          * @param bool   $strict If "true" then contact mustn't be set to pending or readonly
 520          *
 521          * @return boolean is the contact url being followed?
 522          * @throws HTTPException\InternalServerErrorException
 523          * @throws \ImagickException
 524          */
 525         public static function isSharingByURL(string $url, int $uid, bool $strict = false): bool
 526         {
 527                 $cid = self::getIdForURL($url, $uid);
 528
 529                 if (empty($cid)) {
 530                         return false;
 531                 }
 532
 533                 return self::isSharing($cid, $uid, $strict);
 534         }
 535
 536         /**
 537          * Checks if the provided public contact id has got followers on this system
 538          *
 539          * @param integer $cid
 540          * @return boolean
 541          */
 542         public static function hasFollowers(int $cid): bool
 543         {
 544                 return DBA::exists('account-user-view', ["`pid` = ? AND `uid` != ? AND `rel` IN (?, ?)", $cid, 0, self::SHARING, self::FRIEND]);
 545         }
 546
 547         /**
 548          * Get the basepath for a given contact link
 549          *
 550          * @param string $url The contact link
 551          * @param boolean $dont_update Don't update the contact
 552          *
 553          * @return string basepath
 554          * @throws HTTPException\InternalServerErrorException
 555          * @throws \ImagickException
 556          */
 557         public static function getBasepath(string $url, bool $dont_update = false): string
 558         {
 559                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 560                 if (!DBA::isResult($contact)) {
 561                         return '';
 562                 }
 563
 564                 if (!empty($contact['baseurl'])) {
 565                         return $contact['baseurl'];
 566                 } elseif ($dont_update) {
 567                         return '';
 568                 }
 569
 570                 // Update the existing contact
 571                 self::updateFromProbe($contact['id']);
 572
 573                 // And fetch the result
 574                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 575                 if (empty($contact['baseurl'])) {
 576                         Logger::info('No baseurl for contact', ['url' => $url]);
 577                         return '';
 578                 }
 579
 580                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 581                 return $contact['baseurl'];
 582         }
 583
 584         /**
 585          * Check if the given contact url is on the same server
 586          *
 587          * @param string $url The contact link
 588          *
 589          * @return boolean Is it the same server?
 590          */
 591         public static function isLocal(string $url): bool
 592         {
 593                 if (!parse_url($url, PHP_URL_SCHEME)) {
 594                         $addr_parts = explode('@', $url);
 595                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHost());
 596                 }
 597
 598                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 599         }
 600
 601         /**
 602          * Check if the given contact ID is on the same server
 603          *
 604          * @param string $url The contact link
 605          * @return boolean Is it the same server?
 606          */
 607         public static function isLocalById(int $cid): bool
 608         {
 609                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 610                 if (!DBA::isResult($contact)) {
 611                         return false;
 612                 }
 613
 614                 if (empty($contact['baseurl'])) {
 615                         $baseurl = self::getBasepath($contact['url'], true);
 616                 } else {
 617                         $baseurl = $contact['baseurl'];
 618                 }
 619
 620                 return Strings::compareLink($baseurl, DI::baseUrl());
 621         }
 622
 623         /**
 624          * Returns the public contact id of the given user id
 625          *
 626          * @param  integer $uid User ID
 627          *
 628          * @return integer|boolean Public contact id for given user id
 629          * @throws \Exception
 630          */
 631         public static function getPublicIdByUserId(int $uid)
 632         {
 633                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 634                 if (!DBA::isResult($self)) {
 635                         return false;
 636                 }
 637                 return self::getIdForURL($self['url']);
 638         }
 639
 640         /**
 641          * Returns the contact id for the user and the public contact id for a given contact id
 642          *
 643          * @param int $cid Either public contact id or user's contact id
 644          * @param int $uid User ID
 645          *
 646          * @return array with public and user's contact id
 647          * @throws HTTPException\InternalServerErrorException
 648          * @throws \ImagickException
 649          */
 650         public static function getPublicAndUserContactID(int $cid, int $uid): array
 651         {
 652                 // We have to use the legacy function as long as the post update hasn't finished
 653                 if (DI::keyValue()->get('post_update_version') < 1427) {
 654                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 655                 }
 656
 657                 if (empty($uid) || empty($cid)) {
 658                         return [];
 659                 }
 660
 661                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 662                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 663                         return [];
 664                 }
 665
 666                 $pcid = $contact['pid'];
 667                 if ($contact['uid'] == $uid) {
 668                         $ucid = $contact['id'];
 669                 } else {
 670                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 671                         if (DBA::isResult($contact)) {
 672                                 $ucid = $contact['id'];
 673                         } else {
 674                                 $ucid = 0;
 675                         }
 676                 }
 677
 678                 return ['public' => $pcid, 'user' => $ucid];
 679         }
 680
 681         /**
 682          * Helper function for "getPublicAndUserContactID"
 683          *
 684          * @param int $cid Either public contact id or user's contact id
 685          * @param int $uid User ID
 686          * @return array with public and user's contact id
 687          * @throws HTTPException\InternalServerErrorException
 688          * @throws \ImagickException
 689          */
 690         private static function legacyGetPublicAndUserContactID(int $cid, int $uid): array
 691         {
 692                 if (empty($uid) || empty($cid)) {
 693                         return [];
 694                 }
 695
 696                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 697                 if (!DBA::isResult($contact)) {
 698                         return [];
 699                 }
 700
 701                 // We quit when the user id don't match the user id of the provided contact
 702                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 703                         return [];
 704                 }
 705
 706                 if ($contact['uid'] != 0) {
 707                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 708                         if (empty($pcid)) {
 709                                 return [];
 710                         }
 711                         $ucid = $contact['id'];
 712                 } else {
 713                         $pcid = $contact['id'];
 714                         $ucid = self::getIdForURL($contact['url'], $uid);
 715                 }
 716
 717                 return ['public' => $pcid, 'user' => $ucid];
 718         }
 719
 720         /**
 721          * Returns contact details for a given contact id in combination with a user id
 722          *
 723          * @param int $cid A contact ID
 724          * @param int $uid The User ID
 725          * @param array $fields The selected fields for the contact
 726          * @return array The contact details
 727          *
 728          * @throws \Exception
 729          */
 730         public static function getContactForUser(int $cid, int $uid, array $fields = []): array
 731         {
 732                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 733
 734                 if (!DBA::isResult($contact)) {
 735                         return [];
 736                 } else {
 737                         return $contact;
 738                 }
 739         }
 740
 741         /**
 742          * Creates the self-contact for the provided user id
 743          *
 744          * @param int $uid
 745          * @return bool Operation success
 746          * @throws HTTPException\InternalServerErrorException
 747          */
 748         public static function createSelfFromUserId(int $uid): bool
 749         {
 750                 $user = DBA::selectFirst(
 751                         'user',
 752                         ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 753                         ['uid' => $uid, 'verified' => true, 'blocked' => false, 'account_removed' => false, 'account_expired' => false]
 754                 );
 755                 if (!DBA::isResult($user)) {
 756                         return false;
 757                 }
 758
 759                 $contact = [
 760                         'uid'         => $user['uid'],
 761                         'created'     => DateTimeFormat::utcNow(),
 762                         'self'        => 1,
 763                         'name'        => $user['username'],
 764                         'nick'        => $user['nickname'],
 765                         'pubkey'      => $user['pubkey'],
 766                         'prvkey'      => $user['prvkey'],
 767                         'photo'       => User::getAvatarUrl($user),
 768                         'thumb'       => User::getAvatarUrl($user, Proxy::SIZE_THUMB),
 769                         'micro'       => User::getAvatarUrl($user, Proxy::SIZE_MICRO),
 770                         'blocked'     => 0,
 771                         'pending'     => 0,
 772                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 773                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 774                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 775                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 776                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 777                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 778                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 779                         'name-date'   => DateTimeFormat::utcNow(),
 780                         'uri-date'    => DateTimeFormat::utcNow(),
 781                         'avatar-date' => DateTimeFormat::utcNow(),
 782                         'closeness'   => 0
 783                 ];
 784
 785                 $return = true;
 786
 787                 // Only create the entry if it doesn't exist yet
 788                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 789                         $return = (bool)self::insert($contact);
 790                 }
 791
 792                 // Create the public contact
 793                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 794                         $contact['self']   = false;
 795                         $contact['uid']    = 0;
 796                         $contact['prvkey'] = null;
 797
 798                         self::insert($contact, Database::INSERT_IGNORE);
 799                 }
 800
 801                 return $return;
 802         }
 803
 804         /**
 805          * Updates the self-contact for the provided user id
 806          *
 807          * @param int  $uid
 808          * @param bool $update_avatar Force the avatar update
 809          * @return bool "true" if updated
 810          * @throws \Exception
 811          */
 812         public static function updateSelfFromUserID(int $uid, bool $update_avatar = false): bool
 813         {
 814                 $fields = [
 815                         'id', 'uri-id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey', 'manually-approve',
 816                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 817                         'photo', 'thumb', 'micro', 'header', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'
 818                 ];
 819                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 820                 if (!DBA::isResult($self)) {
 821                         return false;
 822                 }
 823
 824                 $fields = ['uid', 'username', 'nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 825                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'verified' => true, 'blocked' => false, 'account_removed' => false, 'account_expired' => false]);
 826                 if (!DBA::isResult($user)) {
 827                         return false;
 828                 }
 829
 830                 $fields = [
 831                         'name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 832                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'
 833                 ];
 834                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 835                 if (!DBA::isResult($profile)) {
 836                         return false;
 837                 }
 838
 839                 $file_suffix = 'jpg';
 840                 $url = DI::baseUrl() . '/profile/' . $user['nickname'];
 841
 842                 $fields = [
 843                         'name'         => $user['username'],
 844                         'nick'         => $user['nickname'],
 845                         'avatar-date'  => $self['avatar-date'],
 846                         'location'     => Profile::formatLocation($profile),
 847                         'about'        => $profile['about'],
 848                         'keywords'     => $profile['pub_keywords'],
 849                         'contact-type' => $user['account-type'],
 850                         'prvkey'       => $user['prvkey'],
 851                         'pubkey'       => $user['pubkey'],
 852                         'xmpp'         => $profile['xmpp'],
 853                         'matrix'       => $profile['matrix'],
 854                         'network'      => Protocol::DFRN,
 855                         'url'          => $url,
 856                         // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 857                         'nurl'         => Strings::normaliseLink($url),
 858                         'uri-id'       => ItemURI::getIdByURI($url),
 859                         'addr'         => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 860                         'request'      => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 861                         'notify'       => DI::baseUrl() . '/dfrn_notify/' . $user['nickname'],
 862                         'poll'         => DI::baseUrl() . '/dfrn_poll/' . $user['nickname'],
 863                         'confirm'      => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 864                 ];
 865
 866                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 867                 if (DBA::isResult($avatar)) {
 868                         if ($update_avatar) {
 869                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 870                         }
 871
 872                         // Creating the path to the avatar, beginning with the file suffix
 873                         $types = Images::supportedTypes();
 874                         if (isset($types[$avatar['type']])) {
 875                                 $file_suffix = $types[$avatar['type']];
 876                         }
 877
 878                         // We are adding a timestamp value so that other systems won't use cached content
 879                         $timestamp = strtotime($fields['avatar-date']);
 880
 881                         $prefix = DI::baseUrl() . '/photo/' . $avatar['resource-id'] . '-';
 882                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 883
 884                         $fields['photo'] = $prefix . '4' . $suffix;
 885                         $fields['thumb'] = $prefix . '5' . $suffix;
 886                         $fields['micro'] = $prefix . '6' . $suffix;
 887                 } else {
 888                         // We hadn't found a photo entry, so we use the default avatar
 889                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 890                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 891                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 892                 }
 893
 894                 $fields['avatar'] = User::getAvatarUrl($user);
 895                 $fields['header'] = User::getBannerUrl($user);
 896                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 897                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 898                 $fields['unsearchable'] = !$profile['net-publish'];
 899                 $fields['manually-approve'] = in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
 900
 901                 $update = false;
 902
 903                 foreach ($fields as $field => $content) {
 904                         if ($self[$field] != $content) {
 905                                 $update = true;
 906                         }
 907                 }
 908
 909                 if ($update) {
 910                         if ($fields['name'] != $self['name']) {
 911                                 $fields['name-date'] = DateTimeFormat::utcNow();
 912                         }
 913                         $fields['updated'] = DateTimeFormat::utcNow();
 914                         self::update($fields, ['id' => $self['id']]);
 915
 916                         // Update the other contacts as well
 917                         unset($fields['prvkey']);
 918                         $fields['self'] = false;
 919                         self::update($fields, ['uri-id' => $self['uri-id'], 'self' => false]);
 920
 921                         // Update the profile
 922                         $fields = [
 923                                 'photo' => User::getAvatarUrl($user),
 924                                 'thumb' => User::getAvatarUrl($user, Proxy::SIZE_THUMB)
 925                         ];
 926
 927                         DBA::update('profile', $fields, ['uid' => $uid]);
 928                 }
 929
 930                 return $update;
 931         }
 932
 933         /**
 934          * Marks a contact for removal
 935          *
 936          * @param int $id contact id
 937          * @return void
 938          * @throws HTTPException\InternalServerErrorException
 939          */
 940         public static function remove(int $id)
 941         {
 942                 // We want just to make sure that we don't delete our "self" contact
 943                 $contact = DBA::selectFirst('contact', ['uri-id', 'photo', 'thumb', 'micro', 'uid'], ['id' => $id, 'self' => false]);
 944                 if (!DBA::isResult($contact)) {
 945                         return;
 946                 }
 947
 948                 DBA::delete('account-user', ['id' => $id]);
 949
 950                 self::clearFollowerFollowingEndpointCache($contact['uid']);
 951
 952                 // Archive the contact
 953                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'rel' => self::NOTHING, 'deleted' => true], ['id' => $id]);
 954
 955                 if (!DBA::exists('contact', ['uri-id' => $contact['uri-id'], 'deleted' => false])) {
 956                         Avatar::deleteCache($contact);
 957                 }
 958
 959                 // Delete it in the background
 960                 Worker::add(Worker::PRIORITY_MEDIUM, 'Contact\Remove', $id);
 961         }
 962
 963         /**
 964          * Unfollow the remote contact
 965          *
 966          * @param array $contact Target user-specific contact (uid != 0) array
 967          * @return void
 968          * @throws HTTPException\InternalServerErrorException
 969          * @throws \ImagickException
 970          */
 971         public static function unfollow(array $contact): void
 972         {
 973                 if (empty($contact['network'])) {
 974                         throw new \InvalidArgumentException('Empty network in contact array');
 975                 }
 976
 977                 if (empty($contact['uid'])) {
 978                         throw new \InvalidArgumentException('Unexpected public contact record');
 979                 }
 980
 981                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 982                         $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
 983                         if (!empty($cdata['public'])) {
 984                                 Worker::add(Worker::PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 985                         }
 986                 }
 987
 988                 self::removeSharer($contact);
 989         }
 990
 991         /**
 992          * Revoke follow privileges of the remote user contact
 993          *
 994          * The local relationship is updated immediately, the eventual remote server is messaged in the background.
 995          *
 996          * @param array $contact User-specific contact array (uid != 0) to revoke the follow from
 997          * @return void
 998          * @throws HTTPException\InternalServerErrorException
 999          * @throws \ImagickException
1000          */
1001         public static function revokeFollow(array $contact): void
1002         {
1003                 if (empty($contact['network'])) {
1004                         throw new \InvalidArgumentException('Empty network in contact array');
1005                 }
1006
1007                 if (empty($contact['uid'])) {
1008                         throw new \InvalidArgumentException('Unexpected public contact record');
1009                 }
1010
1011                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
1012                         $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
1013                         if (!empty($cdata['public'])) {
1014                                 Worker::add(Worker::PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
1015                         }
1016                 }
1017
1018                 self::removeFollower($contact);
1019         }
1020
1021         /**
1022          * Completely severs a relationship with a contact
1023          *
1024          * @param array $contact User-specific contact (uid != 0) array
1025          * @return void
1026          * @throws HTTPException\InternalServerErrorException
1027          * @throws \ImagickException
1028          */
1029         public static function terminateFriendship(array $contact)
1030         {
1031                 if (empty($contact['network'])) {
1032                         throw new \InvalidArgumentException('Empty network in contact array');
1033                 }
1034
1035                 if (empty($contact['uid'])) {
1036                         throw new \InvalidArgumentException('Unexpected public contact record');
1037                 }
1038
1039                 $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
1040
1041                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND]) && !empty($cdata['public'])) {
1042                         Worker::add(Worker::PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
1043                 }
1044
1045                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) && !empty($cdata['public'])) {
1046                         Worker::add(Worker::PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
1047                 }
1048
1049                 self::remove($contact['id']);
1050         }
1051
1052         private static function clearFollowerFollowingEndpointCache(int $uid)
1053         {
1054                 if (empty($uid)) {
1055                         return;
1056                 }
1057
1058                 DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_CONTACTS . 'followers:' . $uid);
1059                 DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_CONTACTS . 'following:' . $uid);
1060         }
1061
1062         /**
1063          * Marks a contact for archival after a communication issue delay
1064          *
1065          * Contact has refused to recognise us as a friend. We will start a countdown.
1066          * If they still don't recognise us in 32 days, the relationship is over,
1067          * and we won't waste any more time trying to communicate with them.
1068          * This provides for the possibility that their database is temporarily messed
1069          * up or some other transient event and that there's a possibility we could recover from it.
1070          *
1071          * @param array $contact contact to mark for archival
1072          * @return void
1073          * @throws HTTPException\InternalServerErrorException
1074          */
1075         public static function markForArchival(array $contact)
1076         {
1077                 if (!isset($contact['url']) && !empty($contact['id'])) {
1078                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
1079                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
1080                         if (!DBA::isResult($contact)) {
1081                                 return;
1082                         }
1083                 } elseif (!isset($contact['url'])) {
1084                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
1085                 }
1086
1087                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
1088
1089                 // Contact already archived or "self" contact? => nothing to do
1090                 if ($contact['archive'] || $contact['self']) {
1091                         return;
1092                 }
1093
1094                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
1095                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
1096                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
1097                 } else {
1098                         /* @todo
1099                          * We really should send a notification to the owner after 2-3 weeks
1100                          * so they won't be surprised when the contact vanishes and can take
1101                          * remedial action if this was a serious mistake or glitch
1102                          */
1103
1104                         /// @todo Check for contact vitality via probing
1105                         $archival_days = DI::config()->get('system', 'archival_days', 32);
1106
1107                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
1108                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
1109                                 /* Relationship is really truly dead. archive them rather than
1110                                  * delete, though if the owner tries to unarchive them we'll start
1111                                  * the whole process over again.
1112                                  */
1113                                 self::update(['archive' => true], ['id' => $contact['id']]);
1114                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1115                         }
1116                 }
1117         }
1118
1119         /**
1120          * Cancels the archival countdown
1121          *
1122          * @see   Contact::markForArchival()
1123          *
1124          * @param array $contact contact to be unmarked for archival
1125          * @return void
1126          * @throws \Exception
1127          */
1128         public static function unmarkForArchival(array $contact)
1129         {
1130                 // Always unarchive the relay contact entry
1131                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
1132                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
1133                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1134                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
1135                                 self::update($fields, $condition);
1136                         }
1137                 }
1138
1139                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
1140                 $exists = DBA::exists('contact', $condition);
1141
1142                 // We don't need to update, we never marked this contact for archival
1143                 if (!$exists) {
1144                         return;
1145                 }
1146
1147                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
1148
1149                 if (!isset($contact['url']) && !empty($contact['id'])) {
1150                         $fields = ['id', 'url', 'batch'];
1151                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
1152                         if (!DBA::isResult($contact)) {
1153                                 return;
1154                         }
1155                 }
1156
1157                 // It's a miracle. Our dead contact has inexplicably come back to life.
1158                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
1159                 self::update($fields, ['id' => $contact['id']]);
1160                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1161         }
1162
1163         /**
1164          * Returns the data array for the photo menu of a given contact
1165          *
1166          * @param array $contact contact
1167          * @param int   $uid     Visitor user id
1168          * @return array
1169          * @throws HTTPException\InternalServerErrorException
1170          * @throws \ImagickException
1171          */
1172         public static function photoMenu(array $contact, int $uid): array
1173         {
1174                 // Anonymous visitor
1175                 if (!$uid) {
1176                         return ['profile' => [DI::l10n()->t('View Profile'), self::magicLinkByContact($contact), true]];
1177                 }
1178
1179                 $pm_url      = '';
1180                 $mention_url = '';
1181                 $status_link = '';
1182                 $photos_link = '';
1183
1184                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1185                         $profile_link = 'contact/redir/' . $contact['id'];
1186                         $status_link  = $profile_link . '?' . http_build_query(['url' => $contact['url'] . '/status']);
1187                         $photos_link  = $profile_link . '?' . http_build_query(['url' => $contact['url'] . '/photos']);
1188                         $profile_link = $profile_link . '?' . http_build_query(['url' => $contact['url'] . '/profile']);
1189                 } else {
1190                         $profile_link = $contact['url'];
1191                 }
1192
1193                 if ($profile_link === 'mailbox') {
1194                         $profile_link = '';
1195                 }
1196
1197                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1198                         $pm_url = 'message/new/' . $contact['id'];
1199                 }
1200
1201                 $mention_url = 'compose/0?body=@' . $contact['addr'];
1202                 $contact_url = 'contact/' . $contact['id'];
1203                 $posts_link = 'contact/' . $contact['id'] . '/conversations';
1204
1205                 $follow_link   = '';
1206                 $unfollow_link = '';
1207                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1208                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1209                                 $unfollow_link = 'contact/unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1210                         } elseif (!$contact['pending']) {
1211                                 $follow_link = 'contact/follow?url=' . urlencode($contact['url']) . '&auto=1';
1212                         }
1213                 }
1214
1215                 /**
1216                  * Menu array:
1217                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1218                  */
1219                 if (empty($contact['uid'])) {
1220                         $menu = [
1221                                 'profile'  => [DI::l10n()->t('View Profile'), $profile_link, true],
1222                                 'network'  => [DI::l10n()->t('Network Posts'), $posts_link, false],
1223                                 'edit'     => [DI::l10n()->t('View Contact'), $contact_url, false],
1224                                 'follow'   => [DI::l10n()->t('Connect/Follow'), $follow_link, true],
1225                                 'unfollow' => [DI::l10n()->t('Unfollow'), $unfollow_link, true],
1226                         ];
1227                 } else {
1228                         $menu = [
1229                                 'status'   => [DI::l10n()->t('View Status'), $status_link, true],
1230                                 'profile'  => [DI::l10n()->t('View Profile'), $profile_link, true],
1231                                 'photos'   => [DI::l10n()->t('View Photos'), $photos_link, true],
1232                                 'network'  => [DI::l10n()->t('Network Posts'), $posts_link, false],
1233                                 'edit'     => [DI::l10n()->t('View Contact'), $contact_url, false],
1234                                 'pm'       => [DI::l10n()->t('Send PM'), $pm_url, false],
1235                                 'mention'  => [DI::l10n()->t('Mention'), DI::l10n()->t('Post to group'), $mention_url, false],
1236                                 'follow'   => [DI::l10n()->t('Connect/Follow'), $follow_link, true],
1237                                 'unfollow' => [DI::l10n()->t('Unfollow'), $unfollow_link, true],
1238                                 'isgroup'  => [$contact['forum'], true],
1239                         ];
1240
1241                         if (!empty($contact['pending'])) {
1242                                 try {
1243                                         $intro          = DI::intro()->selectForContact($contact['id']);
1244                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1245                                 } catch (IntroductionNotFoundException $exception) {
1246                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1247                                 }
1248                         }
1249                 }
1250
1251                 $args = ['contact' => $contact, 'menu' => &$menu];
1252
1253                 Hook::callAll('contact_photo_menu', $args);
1254
1255                 $menucondensed = [];
1256
1257                 foreach ($menu as $menuname => $menuitem) {
1258                         if ($menuitem[1] != '') {
1259                                 $menucondensed[$menuname] = $menuitem;
1260                         }
1261                 }
1262
1263                 return $menucondensed;
1264         }
1265
1266         /**
1267          * Fetch the contact id for a given URL and user
1268          *
1269          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1270          * `addr` or `alias`.
1271          *
1272          * If there's no record and we aren't looking for a public contact, we quit.
1273          * If there's one, we check that it isn't time to update the picture else we
1274          * directly return the found contact id.
1275          *
1276          * Second, we probe the provided $url whether it's http://server.tld/profile or
1277          * nick@server.tld. We quit if we can't get any info back.
1278          *
1279          * Third, we create the contact record if it doesn't exist
1280          *
1281          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1282          * if there's any updates
1283          *
1284          * @param string  $url       Contact URL
1285          * @param integer $uid       The user id for the contact (0 = public contact)
1286          * @param boolean $update    true = always update, false = never update, null = update when not found
1287          * @param array   $default   Default value for creating the contact when everything else fails
1288          *
1289          * @return integer Contact ID
1290          * @throws HTTPException\InternalServerErrorException
1291          * @throws \ImagickException
1292          */
1293         public static function getIdForURL(string $url = null, int $uid = 0, $update = null, array $default = []): int
1294         {
1295                 $contact_id = 0;
1296
1297                 if (empty($url)) {
1298                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1299                         return 0;
1300                 }
1301
1302                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id', 'next-update', 'local-data'], $uid);
1303
1304                 if (!empty($contact)) {
1305                         $contact_id = $contact['id'];
1306
1307                         $background_update = DI::config()->get('system', 'update_active_contacts') ? $contact['local-data'] : true;
1308
1309                         if ($background_update && !self::isLocal($url) && Protocol::supportsProbe($contact['network']) && ($contact['next-update'] < DateTimeFormat::utcNow())) {
1310                                 try {
1311                                         UpdateContact::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], $contact['id']);
1312                                 } catch (\InvalidArgumentException $e) {
1313                                         Logger::notice($e->getMessage(), ['contact' => $contact]);
1314                                 }
1315                         }
1316
1317                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1318                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1319                                 return $contact_id;
1320                         }
1321                 } elseif ($uid != 0) {
1322                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1323                         return 0;
1324                 } elseif (empty($default) && !is_null($update) && !$update) {
1325                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1326                         return 0;
1327                 }
1328
1329                 $data = [];
1330
1331                 if (empty($default['network']) || $update) {
1332                         $data = Probe::uri($url, '', $uid);
1333
1334                         // Take the default values when probing failed
1335                         if (!empty($default) && !in_array($data['network'], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1336                                 $data = array_merge($data, $default);
1337                         }
1338                 } elseif (!empty($default['network'])) {
1339                         $data = $default;
1340                 }
1341
1342                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1343                         // Fetch data for the public contact via the first found personal contact
1344                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1345                         $fields = [
1346                                 'name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1347                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1348                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'
1349                         ];
1350
1351                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1352                         if (!DBA::isResult($personal_contact)) {
1353                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1354                         }
1355
1356                         if (DBA::isResult($personal_contact)) {
1357                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1358                                 $data = $personal_contact;
1359                                 $data['photo'] = $personal_contact['avatar'];
1360                                 $data['account-type'] = $personal_contact['contact-type'];
1361                                 $data['hide'] = $personal_contact['unsearchable'];
1362                                 unset($data['avatar']);
1363                                 unset($data['contact-type']);
1364                                 unset($data['unsearchable']);
1365                         }
1366                 }
1367
1368                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1369                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1370                         return 0;
1371                 }
1372
1373                 if (!$contact_id && !empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1374                         Logger::info('Contact is a tombstone. It will not be inserted', ['url' => $url, 'uid' => $uid]);
1375                         return 0;
1376                 }
1377
1378                 if (!$contact_id) {
1379                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1380                         if (!empty($data['alias'])) {
1381                                 $urls[] = Strings::normaliseLink($data['alias']);
1382                         }
1383                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1384                         if (!empty($contact['id'])) {
1385                                 $contact_id = $contact['id'];
1386                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1387                         }
1388                 }
1389
1390                 if (!$contact_id) {
1391                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1392                         $fields = [
1393                                 'uid'       => $uid,
1394                                 'url'       => $data['url'],
1395                                 'baseurl'   => $data['baseurl'] ?? '',
1396                                 'nurl'      => Strings::normaliseLink($data['url']),
1397                                 'network'   => $data['network'],
1398                                 'created'   => DateTimeFormat::utcNow(),
1399                                 'rel'       => self::SHARING,
1400                                 'writable'  => 1,
1401                                 'blocked'   => 0,
1402                                 'readonly'  => 0,
1403                                 'pending'   => 0,
1404                         ];
1405
1406                         $condition = ['nurl' => Strings::normaliseLink($data['url']), 'uid' => $uid, 'deleted' => false];
1407
1408                         // Before inserting we do check if the entry does exist now.
1409                         $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1410                         if (DBA::isResult($contact)) {
1411                                 $contact_id = $contact['id'];
1412                                 Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1413                         } else {
1414                                 $contact_id = self::insert($fields);
1415                                 if ($contact_id) {
1416                                         Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1417                                 }
1418                         }
1419
1420                         if (!$contact_id) {
1421                                 Logger::warning('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1422                                 return 0;
1423                         }
1424                 } else {
1425                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1426                 }
1427
1428                 if ($data['network'] == Protocol::DIASPORA) {
1429                         try {
1430                                 DI::dsprContact()->updateFromProbeArray($data);
1431                         } catch (HTTPException\NotFoundException $e) {
1432                                 Logger::notice($e->getMessage(), ['url' => $url, 'data' => $data]);
1433                         } catch (\InvalidArgumentException $e) {
1434                                 Logger::notice($e->getMessage(), ['url' => $url, 'data' => $data]);
1435                         }
1436                 } elseif (!empty($data['networks'][Protocol::DIASPORA])) {
1437                         try {
1438                                 DI::dsprContact()->updateFromProbeArray($data['networks'][Protocol::DIASPORA]);
1439                         } catch (HTTPException\NotFoundException $e) {
1440                                 Logger::notice($e->getMessage(), ['url' => $url, 'data' => $data['networks'][Protocol::DIASPORA]]);
1441                         } catch (\InvalidArgumentException $e) {
1442                                 Logger::notice($e->getMessage(), ['url' => $url, 'data' => $data['networks'][Protocol::DIASPORA]]);
1443                         }
1444                 }
1445
1446                 self::updateFromProbeArray($contact_id, $data);
1447
1448                 // Don't return a number for a deleted account
1449                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1450                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1451                         return 0;
1452                 }
1453
1454                 return $contact_id;
1455         }
1456
1457         /**
1458          * Checks if the contact is archived
1459          *
1460          * @param int $cid contact id
1461          *
1462          * @return boolean Is the contact archived?
1463          * @throws HTTPException\InternalServerErrorException
1464          */
1465         public static function isArchived(int $cid): bool
1466         {
1467                 if ($cid == 0) {
1468                         return false;
1469                 }
1470
1471                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1472                 if (!DBA::isResult($contact)) {
1473                         return false;
1474                 }
1475
1476                 if ($contact['archive']) {
1477                         return true;
1478                 }
1479
1480                 // Check status of ActivityPub endpoints
1481                 $apcontact = APContact::getByURL($contact['url'], false);
1482                 if (!empty($apcontact)) {
1483                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1484                                 return true;
1485                         }
1486
1487                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1488                                 return true;
1489                         }
1490                 }
1491
1492                 // Check status of Diaspora endpoints
1493                 if (!empty($contact['batch'])) {
1494                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1495                         return DBA::exists('contact', $condition);
1496                 }
1497
1498                 return false;
1499         }
1500
1501         /**
1502          * Checks if the contact is blocked
1503          *
1504          * @param int $cid contact id
1505          * @return boolean Is the contact blocked?
1506          * @throws HTTPException\InternalServerErrorException
1507          */
1508         public static function isBlocked(int $cid): bool
1509         {
1510                 if ($cid == 0) {
1511                         return false;
1512                 }
1513
1514                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1515                 if (!DBA::isResult($blocked)) {
1516                         return false;
1517                 }
1518
1519                 if (Network::isUrlBlocked($blocked['url'])) {
1520                         return true;
1521                 }
1522
1523                 return (bool) $blocked['blocked'];
1524         }
1525
1526         /**
1527          * Checks if the contact is hidden
1528          *
1529          * @param int $cid contact id
1530          * @return boolean Is the contact hidden?
1531          * @throws \Exception
1532          */
1533         public static function isHidden(int $cid): bool
1534         {
1535                 if ($cid == 0) {
1536                         return false;
1537                 }
1538
1539                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1540                 if (!DBA::isResult($hidden)) {
1541                         return false;
1542                 }
1543                 return (bool) $hidden['hidden'];
1544         }
1545
1546         /**
1547          * Returns posts from a given contact url
1548          *
1549          * @param string $contact_url Contact URL
1550          * @param bool   $thread_mode
1551          * @param int    $update      Update mode
1552          * @param int    $parent      Item parent ID for the update mode
1553          * @param bool   $only_media  Only display media content
1554          * @return string posts in HTML
1555          * @throws \Exception
1556          */
1557         public static function getPostsFromUrl(string $contact_url, bool $thread_mode = false, int $update = 0, int $parent = 0, bool $only_media = false): string
1558         {
1559                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1560         }
1561
1562         /**
1563          * Returns posts from a given contact id
1564          *
1565          * @param int  $cid         Contact ID
1566          * @param bool $thread_mode
1567          * @param int  $update      Update mode
1568          * @param int  $parent      Item parent ID for the update mode
1569          * @param bool $only_media  Only display media content
1570          * @return string posts in HTML
1571          * @throws \Exception
1572          */
1573         public static function getPostsFromId(int $cid, bool $thread_mode = false, int $update = 0, int $parent = 0, bool $only_media = false): string
1574         {
1575                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1576                 if (!DBA::isResult($contact)) {
1577                         return '';
1578                 }
1579
1580                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1581                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1582                 } else {
1583                         $sql = "`uid` = ?";
1584                 }
1585
1586                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1587
1588                 if ($thread_mode) {
1589                         $condition = [
1590                                 "((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ? AND `protocol` != ? AND `thr-parent-id` = `parent-uri-id`)) AND " . $sql,
1591                                 $cid, Item::GRAVITY_PARENT, $cid, Item::GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), Conversation::PARCEL_DIASPORA, DI::userSession()->getLocalUserId()
1592                         ];
1593                 } else {
1594                         $condition = [
1595                                 "`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1596                                 $cid, Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT, DI::userSession()->getLocalUserId()
1597                         ];
1598                 }
1599
1600                 if (!empty($parent)) {
1601                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1602                 } else {
1603                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1604                         if (!empty($last_received)) {
1605                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1606                         }
1607                 }
1608
1609                 if ($only_media) {
1610                         $condition = DBA::mergeConditions($condition, [
1611                                 "`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1612                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO
1613                         ]);
1614                 }
1615
1616                 if (DI::mode()->isMobile()) {
1617                         $itemsPerPage = DI::pConfig()->get(
1618                                 DI::userSession()->getLocalUserId(),
1619                                 'system',
1620                                 'itemspage_mobile_network',
1621                                 DI::config()->get('system', 'itemspage_network_mobile')
1622                         );
1623                 } else {
1624                         $itemsPerPage = DI::pConfig()->get(
1625                                 DI::userSession()->getLocalUserId(),
1626                                 'system',
1627                                 'itemspage_network',
1628                                 DI::config()->get('system', 'itemspage_network')
1629                         );
1630                 }
1631
1632                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1633
1634                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1635
1636                 if (DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'infinite_scroll')) {
1637                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1638                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1639                 } else {
1640                         $o = '';
1641                 }
1642
1643                 if ($thread_mode) {
1644                         $fields = ['uri-id', 'thr-parent-id', 'gravity', 'author-id', 'commented'];
1645                         $items = Post::toArray(Post::selectForUser(DI::userSession()->getLocalUserId(), $fields, $condition, $params));
1646
1647                         if ($pager->getStart() == 0) {
1648                                 $cdata = self::getPublicAndUserContactID($cid, DI::userSession()->getLocalUserId());
1649                                 if (!empty($cdata['public'])) {
1650                                         $pinned = Post\Collection::selectToArrayForContact($cdata['public'], Post\Collection::FEATURED, $fields);
1651                                         $items = array_merge($items, $pinned);
1652                                 }
1653                         }
1654
1655                         $o .= DI::conversation()->render($items, ConversationContent::MODE_CONTACTS, $update, false, 'pinned_commented', DI::userSession()->getLocalUserId());
1656                 } else {
1657                         $fields = array_merge(Item::DISPLAY_FIELDLIST, ['featured']);
1658                         $items = Post::toArray(Post::selectForUser(DI::userSession()->getLocalUserId(), $fields, $condition, $params));
1659
1660                         if ($pager->getStart() == 0) {
1661                                 $cdata = self::getPublicAndUserContactID($cid, DI::userSession()->getLocalUserId());
1662                                 if (!empty($cdata['public'])) {
1663                                         $condition = [
1664                                                 "`uri-id` IN (SELECT `uri-id` FROM `collection-view` WHERE `cid` = ? AND `type` = ?)",
1665                                                 $cdata['public'], Post\Collection::FEATURED
1666                                         ];
1667                                         $pinned = Post::toArray(Post::selectForUser(DI::userSession()->getLocalUserId(), $fields, $condition, $params));
1668                                         $items = array_merge($pinned, $items);
1669                                 }
1670                         }
1671
1672                         $o .= DI::conversation()->render($items, ConversationContent::MODE_CONTACT_POSTS, $update);
1673                 }
1674
1675                 if (!$update) {
1676                         if (DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'infinite_scroll')) {
1677                                 $o .= HTML::scrollLoader();
1678                         } else {
1679                                 $o .= $pager->renderMinimal(count($items));
1680                         }
1681                 }
1682
1683                 return $o;
1684         }
1685
1686         /**
1687          * Returns the account type name
1688          *
1689          * The function can be called with either the user or the contact array
1690          *
1691          * @param int $type type of contact or account
1692          * @return string
1693          */
1694         public static function getAccountType(int $type): string
1695         {
1696                 switch ($type) {
1697                         case self::TYPE_ORGANISATION:
1698                                 $account_type = DI::l10n()->t("Organisation");
1699                                 break;
1700
1701                         case self::TYPE_NEWS:
1702                                 $account_type = DI::l10n()->t('News');
1703                                 break;
1704
1705                         case self::TYPE_COMMUNITY:
1706                                 $account_type = DI::l10n()->t("Group");
1707                                 break;
1708
1709                         default:
1710                                 $account_type = "";
1711                                 break;
1712                 }
1713
1714                 return $account_type;
1715         }
1716
1717         /**
1718          * Blocks a contact
1719          *
1720          * @param int $cid Contact id to block
1721          * @param string $reason Block reason
1722          * @return bool Whether it was successful
1723          */
1724         public static function block(int $cid, string $reason = null): bool
1725         {
1726                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1727
1728                 return $return;
1729         }
1730
1731         /**
1732          * Unblocks a contact
1733          *
1734          * @param int $cid Contact id to unblock
1735          * @return bool Whether it was successful
1736          */
1737         public static function unblock(int $cid): bool
1738         {
1739                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1740
1741                 return $return;
1742         }
1743
1744         /**
1745          * Ensure that cached avatar exist
1746          *
1747          * @param integer $cid Contact id
1748          */
1749         public static function checkAvatarCache(int $cid)
1750         {
1751                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1752                 if (!DBA::isResult($contact)) {
1753                         return;
1754                 }
1755
1756                 if (Network::isLocalLink($contact['url'])) {
1757                         return;
1758                 }
1759
1760                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1761                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1762                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1763                                 self::updateAvatar($cid, $contact['avatar'], true);
1764                                 return;
1765                         }
1766                 } elseif (Photo::isPhotoURI($contact['photo']) || Photo::isPhotoURI($contact['thumb']) || Photo::isPhotoURI($contact['micro'])) {
1767                         Logger::info('Replacing legacy avatar cache', ['id' => $cid, 'contact' => $contact]);
1768                         self::updateAvatar($cid, $contact['avatar'], true);
1769                         return;
1770                 } elseif (DI::config()->get('system', 'avatar_cache') && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1771                         Logger::info('Adding avatar cache file', ['id' => $cid, 'contact' => $contact]);
1772                         self::updateAvatar($cid, $contact['avatar'], true);
1773                         return;
1774                 }
1775         }
1776
1777         /**
1778          * Return the photo path for a given contact array in the given size
1779          *
1780          * @param array  $contact   contact array
1781          * @param string $size      Size of the avatar picture
1782          * @param bool   $no_update Don't perform an update if no cached avatar was found
1783          * @return string photo path
1784          */
1785         private static function getAvatarPath(array $contact, string $size, bool $no_update = false): string
1786         {
1787                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1788
1789                 if (DI::config()->get('system', 'avatar_cache')) {
1790                         switch ($size) {
1791                                 case Proxy::SIZE_MICRO:
1792                                         if (!empty($contact['micro']) && !Photo::isPhotoURI($contact['micro'])) {
1793                                                 return $contact['micro'];
1794                                         }
1795                                         break;
1796                                 case Proxy::SIZE_THUMB:
1797                                         if (!empty($contact['thumb']) && !Photo::isPhotoURI($contact['thumb'])) {
1798                                                 return $contact['thumb'];
1799                                         }
1800                                         break;
1801                                 case Proxy::SIZE_SMALL:
1802                                         if (!empty($contact['photo']) && !Photo::isPhotoURI($contact['photo'])) {
1803                                                 return $contact['photo'];
1804                                         }
1805                                         break;
1806                         }
1807                 }
1808
1809                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1810         }
1811
1812         /**
1813          * Return the photo path for a given contact array
1814          *
1815          * @param array  $contact   Contact array
1816          * @param bool   $no_update Don't perform an update if no cached avatar was found
1817          * @return string photo path
1818          */
1819         public static function getPhoto(array $contact, bool $no_update = false): string
1820         {
1821                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1822         }
1823
1824         /**
1825          * Return the photo path (thumb size) for a given contact array
1826          *
1827          * @param array  $contact   Contact array
1828          * @param bool   $no_update Don't perform an update if no cached avatar was found
1829          * @return string photo path
1830          */
1831         public static function getThumb(array $contact, bool $no_update = false): string
1832         {
1833                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1834         }
1835
1836         /**
1837          * Return the photo path (micro size) for a given contact array
1838          *
1839          * @param array  $contact   Contact array
1840          * @param bool   $no_update Don't perform an update if no cached avatar was found
1841          * @return string photo path
1842          */
1843         public static function getMicro(array $contact, bool $no_update = false): string
1844         {
1845                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1846         }
1847
1848         /**
1849          * Check the given contact array for avatar cache fields
1850          *
1851          * @param array $contact
1852          * @param bool  $no_update Don't perform an update if no cached avatar was found
1853          * @return array contact array with avatar cache fields
1854          */
1855         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false): array
1856         {
1857                 $update = false;
1858                 $contact_fields = [];
1859                 $fields = ['photo', 'thumb', 'micro'];
1860                 foreach ($fields as $field) {
1861                         if (isset($contact[$field])) {
1862                                 $contact_fields[] = $field;
1863                         }
1864                         if (isset($contact[$field]) && empty($contact[$field])) {
1865                                 $update = true;
1866                         }
1867                 }
1868
1869                 if (!$update || $no_update) {
1870                         return $contact;
1871                 }
1872
1873                 $local = !empty($contact['url']) && Network::isLocalLink($contact['url']);
1874
1875                 if (!$local && !empty($contact['id']) && !empty($contact['avatar'])) {
1876                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1877
1878                         $new_contact = self::getById($contact['id'], $contact_fields);
1879                         if (DBA::isResult($new_contact)) {
1880                                 // We only update the cache fields
1881                                 $contact = array_merge($contact, $new_contact);
1882                         }
1883                 } elseif ($local && !empty($contact['avatar'])) {
1884                         return $contact;
1885                 }
1886
1887                 /// add the default avatars if the fields aren't filled
1888                 if (isset($contact['photo']) && empty($contact['photo'])) {
1889                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1890                 }
1891                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1892                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1893                 }
1894                 if (isset($contact['micro']) && empty($contact['micro'])) {
1895                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1896                 }
1897
1898                 return $contact;
1899         }
1900
1901         /**
1902          * Fetch the default header for the given contact
1903          *
1904          * @param array $contact  contact array
1905          * @return string avatar URL
1906          */
1907         public static function getDefaultHeader(array $contact): string
1908         {
1909                 if (!empty($contact['header'])) {
1910                         return $contact['header'];
1911                 }
1912
1913                 if (!empty($contact['gsid'])) {
1914                         // Use default banners for certain platforms
1915                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1916                         $platform = strtolower($gserver['platform'] ?? '');
1917                 } else {
1918                         $platform = '';
1919                 }
1920
1921                 switch ($platform) {
1922                         case 'friendica':
1923                         case 'friendika':
1924                                 $header = DI::baseUrl() . (new Header(DI::config()))->getMastodonBannerPath();
1925                                 break;
1926                         case 'diaspora':
1927                                 /**
1928                                  * Picture credits
1929                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1930                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1931                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1932                                  */
1933                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1934                                 break;
1935                         default:
1936                                 /**
1937                                  * Use a random picture.
1938                                  * The service provides random pictures from Unsplash.
1939                                  * @license https://unsplash.com/license
1940                                  */
1941                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1942                                 break;
1943                 }
1944
1945                 return $header;
1946         }
1947
1948         /**
1949          * Fetch the default avatar for the given contact and size
1950          *
1951          * @param array $contact  contact array
1952          * @param string $size    Size of the avatar picture
1953          * @return string avatar URL
1954          */
1955         public static function getDefaultAvatar(array $contact, string $size): string
1956         {
1957                 switch ($size) {
1958                         case Proxy::SIZE_MICRO:
1959                                 $avatar['size'] = 48;
1960                                 $default = self::DEFAULT_AVATAR_MICRO;
1961                                 break;
1962
1963                         case Proxy::SIZE_THUMB:
1964                                 $avatar['size'] = 80;
1965                                 $default = self::DEFAULT_AVATAR_THUMB;
1966                                 break;
1967
1968                         case Proxy::SIZE_SMALL:
1969                         default:
1970                                 $avatar['size'] = 300;
1971                                 $default = self::DEFAULT_AVATAR_PHOTO;
1972                                 break;
1973                 }
1974
1975                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1976                         $platform = '';
1977                         $type     = Contact::TYPE_PERSON;
1978
1979                         if (!empty($contact['id'])) {
1980                                 $account = DBA::selectFirst('account-user-view', ['platform', 'contact-type'], ['id' => $contact['id']]);
1981                                 $platform = $account['platform'] ?? '';
1982                                 $type     = $account['contact-type'] ?? Contact::TYPE_PERSON;
1983                         }
1984
1985                         if (empty($platform) && !empty($contact['uri-id'])) {
1986                                 $account = DBA::selectFirst('account-user-view', ['platform', 'contact-type'], ['uri-id' => $contact['uri-id']]);
1987                                 $platform = $account['platform'] ?? '';
1988                                 $type     = $account['contact-type'] ?? Contact::TYPE_PERSON;
1989                         }
1990
1991                         switch ($platform) {
1992                                 case 'corgidon':
1993                                         /**
1994                                          * Picture credits
1995                                          * @license GNU Affero General Public License v3.0
1996                                          * @link    https://github.com/msdos621/corgidon/blob/main/public/avatars/original/missing.png
1997                                          */
1998                                         $default = '/images/default/corgidon.png';
1999                                         break;
2000
2001                                 case 'diaspora':
2002                                         /**
2003                                          * Picture credits
2004                                          * @license GNU Affero General Public License v3.0
2005                                          * @link    https://github.com/diaspora/diaspora/
2006                                          */
2007                                         $default = '/images/default/diaspora.png';
2008                                         break;
2009
2010                                 case 'gotosocial':
2011                                         /**
2012                                          * Picture credits
2013                                          * @license GNU Affero General Public License v3.0
2014                                          * @link    https://github.com/superseriousbusiness/gotosocial/blob/main/web/assets/default_avatars/GoToSocial_icon1.svg
2015                                          */
2016                                         $default = '/images/default/gotosocial.svg';
2017                                         break;
2018
2019                                 case 'hometown':
2020                                         /**
2021                                          * Picture credits
2022                                          * @license GNU Affero General Public License v3.0
2023                                          * @link    https://github.com/hometown-fork/hometown/blob/hometown-dev/public/avatars/original/missing.png
2024                                          */
2025                                         $default = '/images/default/hometown.png';
2026                                         break;
2027
2028                                 case 'koyuspace':
2029                                         /**
2030                                          * Picture credits
2031                                          * @license GNU Affero General Public License v3.0
2032                                          * @link    https://github.com/koyuspace/mastodon/blob/main/public/avatars/original/missing.png
2033                                          */
2034                                         $default = '/images/default/koyuspace.png';
2035                                         break;
2036
2037                                 case 'ecko':
2038                                 case 'qoto':
2039                                 case 'mastodon':
2040                                         /**
2041                                          * Picture credits
2042                                          * @license GNU Affero General Public License v3.0
2043                                          * @link    https://github.com/mastodon/mastodon/tree/main/public/avatars/original/missing.png
2044                                          */
2045                                         $default = '/images/default/mastodon.png';
2046                                         break;
2047
2048                                 case 'peertube':
2049                                         if ($type == Contact::TYPE_COMMUNITY) {
2050                                                 /**
2051                                                  * Picture credits
2052                                                  * @license GNU Affero General Public License v3.0
2053                                                  * @link    https://github.com/Chocobozzz/PeerTube/blob/develop/client/src/assets/images/default-avatar-video-channel.png
2054                                                  */
2055                                                 $default = '/images/default/peertube-channel.png';
2056                                         } else {
2057                                                 /**
2058                                                  * Picture credits
2059                                                  * @license GNU Affero General Public License v3.0
2060                                                  * @link    https://github.com/Chocobozzz/PeerTube/blob/develop/client/src/assets/images/default-avatar-account.png
2061                                                  */
2062                                                 $default = '/images/default/peertube-account.png';
2063                                         }
2064                                         break;
2065
2066                                 case 'pleroma':
2067                                         /**
2068                                          * Picture credits
2069                                          * @license GNU Affero General Public License v3.0
2070                                          * @link    https://git.pleroma.social/pleroma/pleroma/-/blob/develop/priv/static/images/avi.png
2071                                          */
2072                                         $default = '/images/default/pleroma.png';
2073                                         break;
2074
2075                                 case 'plume':
2076                                         /**
2077                                          * Picture credits
2078                                          * @license GNU Affero General Public License v3.0
2079                                          * @link    https://github.com/Plume-org/Plume/blob/main/assets/images/default-avatar.png
2080                                          */
2081                                         $default = '/images/default/plume.png';
2082                                         break;
2083                         }
2084                         return DI::baseUrl() . $default;
2085                 }
2086
2087                 if (!empty($contact['xmpp'])) {
2088                         $avatar['email'] = $contact['xmpp'];
2089                 } elseif (!empty($contact['addr'])) {
2090                         $avatar['email'] = $contact['addr'];
2091                 } elseif (!empty($contact['url'])) {
2092                         $avatar['email'] = $contact['url'];
2093                 } else {
2094                         return DI::baseUrl() . $default;
2095                 }
2096
2097                 $avatar['url'] = '';
2098                 $avatar['success'] = false;
2099
2100                 Hook::callAll('avatar_lookup', $avatar);
2101
2102                 if ($avatar['success'] && !empty($avatar['url'])) {
2103                         return $avatar['url'];
2104                 }
2105
2106                 return DI::baseUrl() . $default;
2107         }
2108
2109         /**
2110          * Get avatar link for given contact id
2111          *
2112          * @param integer $cid     contact id
2113          * @param string  $size    One of the Proxy::SIZE_* constants
2114          * @param string  $updated Contact update date
2115          * @param bool    $static  If "true" a parameter is added to convert the avatar to a static one
2116          * @return string avatar link
2117          */
2118         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = '', bool $static = false): string
2119         {
2120                 // We have to fetch the "updated" variable when it wasn't provided
2121                 // The parameter can be provided to improve performance
2122                 if (empty($updated)) {
2123                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
2124                         $updated = $account['updated'] ?? '';
2125                         $guid = $account['guid'] ?? '';
2126                 }
2127
2128                 $guid = urlencode($guid);
2129
2130                 $url = DI::baseUrl() . '/photo/contact/';
2131                 switch ($size) {
2132                         case Proxy::SIZE_MICRO:
2133                                 $url .= Proxy::PIXEL_MICRO . '/';
2134                                 break;
2135                         case Proxy::SIZE_THUMB:
2136                                 $url .= Proxy::PIXEL_THUMB . '/';
2137                                 break;
2138                         case Proxy::SIZE_SMALL:
2139                                 $url .= Proxy::PIXEL_SMALL . '/';
2140                                 break;
2141                         case Proxy::SIZE_MEDIUM:
2142                                 $url .= Proxy::PIXEL_MEDIUM . '/';
2143                                 break;
2144                         case Proxy::SIZE_LARGE:
2145                                 $url .= Proxy::PIXEL_LARGE . '/';
2146                                 break;
2147                 }
2148                 $query_params = [];
2149                 if ($updated) {
2150                         $query_params['ts'] = strtotime($updated);
2151                 }
2152                 if ($static) {
2153                         $query_params['static'] = true;
2154                 }
2155
2156                 return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
2157         }
2158
2159         /**
2160          * Get avatar link for given contact URL
2161          *
2162          * @param string  $url  contact url
2163          * @param integer $uid  user id
2164          * @param string  $size One of the Proxy::SIZE_* constants
2165          * @return string avatar link
2166          */
2167         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''): string
2168         {
2169                 $condition = [
2170                         "`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
2171                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0
2172                 ];
2173                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
2174                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
2175         }
2176
2177         /**
2178          * Get header link for given contact id
2179          *
2180          * @param integer $cid     contact id
2181          * @param string  $size    One of the Proxy::SIZE_* constants
2182          * @param string  $updated Contact update date
2183          * @param bool    $static  If "true" a parameter is added to convert the header to a static one
2184          * @return string header link
2185          */
2186         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = '', bool $static = false): string
2187         {
2188                 // We have to fetch the "updated" variable when it wasn't provided
2189                 // The parameter can be provided to improve performance
2190                 if (empty($updated) || empty($guid)) {
2191                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
2192                         $updated = $account['updated'] ?? '';
2193                         $guid = $account['guid'] ?? '';
2194                 }
2195
2196                 $guid = urlencode($guid);
2197
2198                 $url = DI::baseUrl() . '/photo/header/';
2199                 switch ($size) {
2200                         case Proxy::SIZE_MICRO:
2201                                 $url .= Proxy::PIXEL_MICRO . '/';
2202                                 break;
2203                         case Proxy::SIZE_THUMB:
2204                                 $url .= Proxy::PIXEL_THUMB . '/';
2205                                 break;
2206                         case Proxy::SIZE_SMALL:
2207                                 $url .= Proxy::PIXEL_SMALL . '/';
2208                                 break;
2209                         case Proxy::SIZE_MEDIUM:
2210                                 $url .= Proxy::PIXEL_MEDIUM . '/';
2211                                 break;
2212                         case Proxy::SIZE_LARGE:
2213                                 $url .= Proxy::PIXEL_LARGE . '/';
2214                                 break;
2215                 }
2216
2217                 $query_params = [];
2218                 if ($updated) {
2219                         $query_params['ts'] = strtotime($updated);
2220                 }
2221                 if ($static) {
2222                         $query_params['static'] = true;
2223                 }
2224
2225                 return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
2226         }
2227
2228         /**
2229          * Updates the avatar links in a contact only if needed
2230          *
2231          * @param int    $cid          Contact id
2232          * @param string $avatar       Link to avatar picture
2233          * @param bool   $force        force picture update
2234          * @param bool   $create_cache Enforces the creation of cached avatar fields
2235          *
2236          * @return void
2237          * @throws HTTPException\InternalServerErrorException
2238          * @throws HTTPException\NotFoundException
2239          * @throws \ImagickException
2240          */
2241         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
2242         {
2243                 $contact = DBA::selectFirst(
2244                         'contact',
2245                         ['uid', 'avatar', 'photo', 'thumb', 'micro', 'blurhash', 'xmpp', 'addr', 'nurl', 'url', 'network', 'uri-id'],
2246                         ['id' => $cid, 'self' => false]
2247                 );
2248                 if (!DBA::isResult($contact)) {
2249                         return;
2250                 }
2251
2252                 if (!Network::isValidHttpUrl($avatar)) {
2253                         Logger::warning('Invalid avatar', ['cid' => $cid, 'avatar' => $avatar]);
2254                         $avatar = '';
2255                 }
2256
2257                 $uid = $contact['uid'];
2258
2259                 // Only update the cached photo links of public contacts when they already are cached
2260                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
2261                         if (($contact['avatar'] != $avatar) || empty($contact['blurhash'])) {
2262                                 $update_fields = ['avatar' => $avatar];
2263                                 if (!Network::isLocalLink($avatar)) {
2264                                         try {
2265                                                 $fetchResult = HTTPSignature::fetchRaw($avatar, 0, [HttpClientOptions::ACCEPT_CONTENT => [HttpClientAccept::IMAGE]]);
2266
2267                                                 $img_str = $fetchResult->getBody();
2268                                                 if (!empty($img_str)) {
2269                                                         $image = new Image($img_str, Images::getMimeTypeByData($img_str));
2270                                                         if ($image->isValid()) {
2271                                                                 $update_fields['blurhash'] = $image->getBlurHash();
2272                                                         } else {
2273                                                                 return;
2274                                                         }
2275                                                 }
2276                                         } catch (\Exception $exception) {
2277                                                 Logger::notice('Error fetching avatar', ['avatar' => $avatar, 'exception' => $exception]);
2278                                                 return;
2279                                         }
2280                                 } elseif (!empty($contact['blurhash'])) {
2281                                         $update_fields['blurhash'] = null;
2282                                 } else {
2283                                         return;
2284                                 }
2285
2286                                 self::update($update_fields, ['id' => $cid]);
2287                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
2288                         }
2289                         return;
2290                 }
2291
2292                 // User contacts use are updated through the public contacts
2293                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2294                         $pcid = self::getIdForURL($contact['url'], 0, false);
2295                         if (!empty($pcid)) {
2296                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
2297                                 self::updateAvatar($pcid, $avatar, $force, true);
2298                                 return;
2299                         }
2300                 }
2301
2302                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
2303
2304                 if ($default_avatar) {
2305                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
2306                 }
2307
2308                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
2309
2310                 // Local contact avatars don't need to be cached
2311                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
2312                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
2313                 }
2314
2315                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
2316                         if (Avatar::deleteCache($contact)) {
2317                                 $force = true;
2318                         }
2319
2320                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
2321                                 $fields = [
2322                                         'avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
2323                                         'photo' => $avatar,
2324                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
2325                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)
2326                                 ];
2327                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
2328                         }
2329
2330                         // Use the data from the self account
2331                         if (empty($fields)) {
2332                                 $local_uid = User::getIdForURL($contact['url']);
2333                                 if (!empty($local_uid)) {
2334                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
2335                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
2336                                 }
2337                         }
2338
2339                         if (empty($fields)) {
2340                                 $update = ($contact['avatar'] != $avatar) || $force;
2341
2342                                 if (!$update) {
2343                                         $data = [
2344                                                 $contact['photo'] ?? '',
2345                                                 $contact['thumb'] ?? '',
2346                                                 $contact['micro'] ?? '',
2347                                         ];
2348
2349                                         foreach ($data as $image_uri) {
2350                                                 $image_rid = Photo::ridFromURI($image_uri);
2351                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
2352                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
2353                                                         $update = true;
2354                                                 }
2355                                         }
2356                                 }
2357
2358                                 if ($update) {
2359                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
2360                                         if ($photos) {
2361                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'blurhash' => $photos[3], 'avatar-date' => DateTimeFormat::utcNow()];
2362                                                 $update = !empty($fields);
2363                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
2364                                         } else {
2365                                                 $update = false;
2366                                         }
2367                                 }
2368                         } else {
2369                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
2370                         }
2371                 } else {
2372                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
2373                         $fields = Avatar::fetchAvatarContact($contact, $avatar, $force);
2374                         $update = ($avatar . $fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
2375                 }
2376
2377                 if (!$update) {
2378                         return;
2379                 }
2380
2381                 $cids = [];
2382                 $uids = [];
2383                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2384                         // Collect all user contacts of the given public contact
2385                         $personal_contacts = DBA::select(
2386                                 'contact',
2387                                 ['id', 'uid'],
2388                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]
2389                         );
2390                         while ($personal_contact = DBA::fetch($personal_contacts)) {
2391                                 $cids[] = $personal_contact['id'];
2392                                 $uids[] = $personal_contact['uid'];
2393                         }
2394                         DBA::close($personal_contacts);
2395
2396                         if (!empty($cids)) {
2397                                 // Delete possibly existing cached user contact avatars
2398                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
2399                         }
2400                 }
2401
2402                 $cids[] = $cid;
2403                 $uids[] = $uid;
2404                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2405                 self::update($fields, ['id' => $cids]);
2406         }
2407
2408         public static function deleteContactByUrl(string $url)
2409         {
2410                 // Update contact data for all users
2411                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2412                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2413                 while ($contact = DBA::fetch($contacts)) {
2414                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2415                         self::remove($contact['id']);
2416                 }
2417         }
2418
2419         /**
2420          * Helper function for "updateFromProbe". Updates personal and public contact
2421          *
2422          * @param integer $id     contact id
2423          * @param integer $uid    user id
2424          * @param integer $uri_id Uri-Id
2425          * @param string  $url    The profile URL of the contact
2426          * @param array   $fields The fields that are updated
2427          *
2428          * @throws \Exception
2429          */
2430         private static function updateContact(int $id, int $uid, int $uri_id, string $url, array $fields)
2431         {
2432                 if (!self::update($fields, ['id' => $id])) {
2433                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2434                         return;
2435                 }
2436
2437                 self::setAccountUser($id, $uid, $uri_id, $url);
2438
2439                 // Archive or unarchive the contact.
2440                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2441                 if (!DBA::isResult($contact)) {
2442                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2443                         return;
2444                 }
2445
2446                 if (isset($fields['failed'])) {
2447                         if ($fields['failed']) {
2448                                 self::markForArchival($contact);
2449                         } else {
2450                                 self::unmarkForArchival($contact);
2451                         }
2452                 }
2453
2454                 if ($contact['uid'] != 0) {
2455                         return;
2456                 }
2457
2458                 // Update contact data for all users
2459                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2460
2461                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2462
2463                 if (!in_array($contact['network'], Protocol::NATIVE_SUPPORT) && Protocol::supportsProbe($contact['network'])) {
2464                         $condition['network'][] = $contact['network'];
2465                 }
2466
2467                 self::update($fields, $condition);
2468
2469                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2470                 $condition['network'] = Protocol::OSTATUS;
2471
2472                 // If the contact failed, propagate the update fields to all contacts
2473                 if (empty($fields['failed'])) {
2474                         unset($fields['last-update']);
2475                         unset($fields['success_update']);
2476                         unset($fields['failure_update']);
2477                 }
2478
2479                 if (empty($fields)) {
2480                         return;
2481                 }
2482
2483                 self::update($fields, $condition);
2484         }
2485
2486         /**
2487          * Create or update an "account-user" entry
2488          *
2489          * @param integer $id
2490          * @param integer $uid
2491          * @param integer $uri_id
2492          * @param string $url
2493          * @return void
2494          */
2495         public static function setAccountUser(int $id, int $uid, int $uri_id, string $url)
2496         {
2497                 if (empty($uri_id)) {
2498                         return;
2499                 }
2500
2501                 $account_user = DBA::selectFirst('account-user', ['id', 'uid', 'uri-id'], ['id' => $id]);
2502                 if (!empty($account_user['uri-id']) && ($account_user['uri-id'] != $uri_id)) {
2503                         if ($account_user['uid'] == $uid) {
2504                                 $ret = DBA::update('account-user', ['uri-id' => $uri_id], ['id' => $id]);
2505                                 Logger::notice('Updated account-user uri-id', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2506                         } else {
2507                                 // This should never happen
2508                                 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]);
2509                         }
2510                 }
2511
2512                 $account_user = DBA::selectFirst('account-user', ['id', 'uid', 'uri-id'], ['uid' => $uid, 'uri-id' => $uri_id]);
2513                 if (!empty($account_user['id'])) {
2514                         if ($account_user['id'] == $id) {
2515                                 Logger::debug('account-user already exists', ['id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2516                                 return;
2517                         } elseif (!DBA::exists('contact', ['id' => $account_user['id'], 'deleted' => false])) {
2518                                 $ret = DBA::update('account-user', ['id' => $id], ['uid' => $uid, 'uri-id' => $uri_id]);
2519                                 Logger::notice('Updated account-user', ['ret' => $ret, 'account-user' => $account_user, 'cid' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2520                                 return;
2521                         }
2522                         Logger::warning('account-user exists for a different contact id', ['account_user' => $account_user, 'id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2523                         Worker::add(Worker::PRIORITY_HIGH, 'MergeContact', $account_user['id'], $id, $uid);
2524                 } elseif (DBA::insert('account-user', ['id' => $id, 'uri-id' => $uri_id, 'uid' => $uid], Database::INSERT_IGNORE)) {
2525                         Logger::notice('account-user was added', ['id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2526                 } else {
2527                         Logger::warning('account-user was not added', ['id' => $id, 'uid' => $uid, 'uri-id' => $uri_id, 'url' => $url]);
2528                 }
2529         }
2530
2531         /**
2532          * Remove duplicated contacts
2533          *
2534          * @param string  $nurl  Normalised contact url
2535          * @param integer $uid   User id
2536          * @return boolean
2537          * @throws \Exception
2538          */
2539         public static function removeDuplicates(string $nurl, int $uid)
2540         {
2541                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2542                 $count = DBA::count('contact', $condition);
2543                 if ($count <= 1) {
2544                         return false;
2545                 }
2546
2547                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2548                 if (!DBA::isResult($first_contact)) {
2549                         // Shouldn't happen - so we handle it
2550                         return false;
2551                 }
2552
2553                 $first = $first_contact['id'];
2554                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2555
2556                 // Find all duplicates
2557                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2558                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2559                 while ($duplicate = DBA::fetch($duplicates)) {
2560                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2561                                 continue;
2562                         }
2563
2564                         Worker::add(Worker::PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2565                 }
2566                 DBA::close($duplicates);
2567                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2568                 return true;
2569         }
2570
2571         /**
2572          * Perform a contact update if the contact is outdated
2573          *
2574          * @param integer $id contact id
2575          * @return bool
2576          */
2577         public static function updateByIdIfNeeded(int $id): bool
2578         {
2579                 $contact = self::selectFirst(['url'], ["`id` = ? AND `next-update` < ?", $id, DateTimeFormat::utcNow()]);
2580                 if (empty($contact['url'])) {
2581                         return false;
2582                 }
2583
2584                 if (self::isLocal($contact['url'])) {
2585                         return true;
2586                 }
2587
2588                 $stamp = (float)microtime(true);
2589                 self::updateFromProbe($id);
2590                 Logger::debug('Contact data is updated.', ['duration' => round((float)microtime(true) - $stamp, 3), 'id' => $id, 'url' => $contact['url'], 'callstack' => System::callstack(20)]);
2591                 return true;
2592         }
2593
2594         /**
2595          * Perform a contact update if the contact is outdated
2596          *
2597          * @param string $url contact url
2598          * @return bool
2599          */
2600         public static function updateByUrlIfNeeded(string $url): bool
2601         {
2602                 $id = self::getIdForURL($url, 0, false);
2603                 if (!empty($id)) {
2604                         return self::updateByIdIfNeeded($id);
2605                 }
2606                 return (bool)self::getIdForURL($url);
2607         }
2608
2609         /**
2610          * Updates contact record by provided id and optional network
2611          *
2612          * @param integer $id      contact id
2613          * @param string  $network Optional network we are probing for
2614          * @return boolean
2615          * @throws HTTPException\InternalServerErrorException
2616          * @throws \ImagickException
2617          */
2618         public static function updateFromProbe(int $id, string $network = ''): bool
2619         {
2620                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2621                 if (!DBA::isResult($contact)) {
2622                         return false;
2623                 }
2624
2625                 $data = Probe::uri($contact['url'], $network, $contact['uid']);
2626
2627                 if ($data['network'] == Protocol::DIASPORA) {
2628                         try {
2629                                 DI::dsprContact()->updateFromProbeArray($data);
2630                         } catch (HTTPException\NotFoundException $e) {
2631                                 Logger::notice($e->getMessage(), ['id' => $id, 'network' => $network, 'contact' => $contact, 'data' => $data]);
2632                         } catch (\InvalidArgumentException $e) {
2633                                 Logger::notice($e->getMessage(), ['id' => $id, 'network' => $network, 'contact' => $contact, 'data' => $data]);
2634                         }
2635                 } elseif (!empty($data['networks'][Protocol::DIASPORA])) {
2636                         try {
2637                                 DI::dsprContact()->updateFromProbeArray($data['networks'][Protocol::DIASPORA]);
2638                         } catch (HTTPException\NotFoundException $e) {
2639                                 Logger::notice($e->getMessage(), ['id' => $id, 'network' => $network, 'contact' => $contact, 'data' => $data]);
2640                         } catch (\InvalidArgumentException $e) {
2641                                 Logger::notice($e->getMessage(), ['id' => $id, 'network' => $network, 'contact' => $contact, 'data' => $data]);
2642                         }
2643                 }
2644
2645                 return self::updateFromProbeArray($id, $data);
2646         }
2647
2648         /**
2649          * Checks if the given contact has got local data
2650          *
2651          * @param int   $id
2652          * @param array $contact
2653          *
2654          * @return boolean
2655          */
2656         private static function hasLocalData(int $id, array $contact): bool
2657         {
2658                 if (!empty($contact['uri-id']) && DBA::exists('contact', ["`uri-id` = ? AND `uid` != ?", $contact['uri-id'], 0])) {
2659                         // User contacts with the same uri-id exist
2660                         return true;
2661                 } elseif (DBA::exists('contact', ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($contact['url']), 0])) {
2662                         // User contacts with the same nurl exists (compatibility mode for systems with missing uri-id values)
2663                         return true;
2664                 }
2665                 if (DBA::exists('post-tag', ['cid' => $id])) {
2666                         // Is tagged in a post
2667                         return true;
2668                 }
2669                 if (DBA::exists('user-contact', ['cid' => $id])) {
2670                         // Has got user-contact data
2671                         return true;
2672                 }
2673                 if (Post::exists(['author-id' => $id])) {
2674                         // Posts with this author exist
2675                         return true;
2676                 }
2677                 if (Post::exists(['owner-id' => $id])) {
2678                         // Posts with this owner exist
2679                         return true;
2680                 }
2681                 if (Post::exists(['causer-id' => $id])) {
2682                         // Posts with this causer exist
2683                         return true;
2684                 }
2685                 // We don't have got this contact locally
2686                 return false;
2687         }
2688
2689         /**
2690          * Updates contact record by provided id and probed data
2691          *
2692          * @param integer $id      contact id
2693          * @param array   $ret     Probed data
2694          * @return boolean
2695          * @throws HTTPException\InternalServerErrorException
2696          * @throws \ImagickException
2697          */
2698         private static function updateFromProbeArray(int $id, array $ret): bool
2699         {
2700                 /*
2701                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2702                   This will reliably kill your communication with old Friendica contacts.
2703                  */
2704
2705                 // These fields aren't updated by this routine:
2706                 // 'sensitive'
2707
2708                 $fields = [
2709                         'uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2710                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2711                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix',
2712                         'created', 'last-update'
2713                 ];
2714                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2715                 if (!DBA::isResult($contact)) {
2716                         return false;
2717                 }
2718
2719                 if (self::isLocal($ret['url'])) {
2720                         if ($contact['uid'] == 0) {
2721                                 Logger::info('Local contacts are not updated here.');
2722                         } else {
2723                                 self::updateFromPublicContact($id, $contact);
2724                         }
2725                         return true;
2726                 }
2727
2728                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2729                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2730                         self::remove($id);
2731
2732                         // Delete all contacts with the same URL
2733                         self::deleteContactByUrl($ret['url']);
2734                         return true;
2735                 }
2736
2737                 $has_local_data = self::hasLocalData($id, $contact);
2738
2739                 $uid = $contact['uid'];
2740                 unset($contact['uid']);
2741
2742                 $uriid = $contact['uri-id'];
2743                 unset($contact['uri-id']);
2744
2745                 $pubkey = $contact['pubkey'];
2746                 unset($contact['pubkey']);
2747
2748                 $created = $contact['created'];
2749                 unset($contact['created']);
2750
2751                 $last_update = $contact['last-update'];
2752                 unset($contact['last-update']);
2753
2754                 $contact['photo'] = $contact['avatar'];
2755                 unset($contact['avatar']);
2756
2757                 $updated = DateTimeFormat::utcNow();
2758
2759                 if (!Protocol::supportsProbe($ret['network']) && !Protocol::supportsProbe($contact['network'])) {
2760                         // Periodical checks are only done on federated contacts
2761                         $failed_next_update  = null;
2762                         $success_next_update = null;
2763                 } elseif ($has_local_data) {
2764                         $failed_next_update  = GServer::getNextUpdateDate(false, $created, $last_update, !in_array($contact['network'], Protocol::FEDERATED));
2765                         $success_next_update = GServer::getNextUpdateDate(true, $created, $last_update, !in_array($contact['network'], Protocol::FEDERATED));
2766                 } elseif (in_array($ret['network'], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::ZOT, Protocol::PHANTOM]))) {
2767                         $failed_next_update  = DateTimeFormat::utc('now +6 month');
2768                         $success_next_update = DateTimeFormat::utc('now +1 month');
2769                 } else {
2770                         // We don't check connector networks very often to not run into API rate limits
2771                         $failed_next_update  = DateTimeFormat::utc('now +12 month');
2772                         $success_next_update = DateTimeFormat::utc('now +12 month');
2773                 }
2774
2775                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2776                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2777                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => true, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $failed_next_update, 'failure_update' => $updated]);
2778                         return false;
2779                 }
2780
2781                 // We must not try to update relay contacts via probe. They are no real contacts.
2782                 // We check after the probing to be able to correct falsely detected contact types.
2783                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2784                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))
2785                 ) {
2786                         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]);
2787                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2788                         return true;
2789                 }
2790
2791                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2792                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2793                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => true, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $failed_next_update, 'failure_update' => $updated]);
2794                         return false;
2795                 }
2796
2797                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2798                         $cid = self::getIdForURL($ret['url'], 0, false);
2799                         if (!empty($cid) && ($cid != $id)) {
2800                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2801                                 return self::updateFromProbeArray($cid, $ret);
2802                         }
2803                 }
2804
2805                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2806                         $ret['unsearchable'] = $ret['hide'];
2807                 }
2808
2809                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2810                         $ret['forum'] = false;
2811                         $ret['prv'] = false;
2812                         $ret['contact-type'] = $ret['account-type'];
2813                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2814                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2815                                 $ret['prv'] = (bool)!$ret['forum'];
2816                         }
2817                 }
2818
2819                 $new_pubkey = $ret['pubkey'] ?? '';
2820
2821                 if ($uid == 0 && DI::config()->get('system', 'fetch_featured_posts')) {
2822                         if ($ret['network'] == Protocol::ACTIVITYPUB) {
2823                                 $apcontact = APContact::getByURL($ret['url'], false);
2824                                 if (!empty($apcontact['featured'])) {
2825                                         Worker::add(Worker::PRIORITY_LOW, 'FetchFeaturedPosts', $ret['url']);
2826                                 }
2827                         }
2828
2829                         $ret['last-item'] = Probe::getLastUpdate($ret);
2830                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2831                 }
2832
2833                 $update = false;
2834                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], $ret['baseurl'] ?? $ret['alias'] ?? '');
2835
2836                 // make sure to not overwrite existing values with blank entries except some technical fields
2837                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2838                 foreach ($ret as $key => $val) {
2839                         if (!array_key_exists($key, $contact)) {
2840                                 unset($ret[$key]);
2841                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2842                                 $ret[$key] = $contact[$key];
2843                         } elseif ($ret[$key] != $contact[$key]) {
2844                                 $update = true;
2845                         }
2846                 }
2847
2848                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2849                         $update = true;
2850                 } else {
2851                         unset($ret['last-item']);
2852                 }
2853
2854                 if (empty($uriid)) {
2855                         $update = true;
2856                 }
2857
2858                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2859                         self::updateAvatar($id, $ret['photo'], $update);
2860                 }
2861
2862                 if (!$update) {
2863                         self::updateContact($id, $uid, $uriid, $contact['url'], ['failed' => false, 'local-data' => $has_local_data, 'last-update' => $updated, 'next-update' => $success_next_update, 'success_update' => $updated]);
2864
2865                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2866                                 Worker::add(Worker::PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2867                         }
2868
2869                         // Update the public contact
2870                         if ($uid != 0) {
2871                                 $contact = self::getByURL($ret['url'], false, ['id']);
2872                                 if (!empty($contact['id'])) {
2873                                         self::updateFromProbeArray($contact['id'], $ret);
2874                                 }
2875                         }
2876
2877                         return true;
2878                 }
2879
2880                 $ret['uri-id']      = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2881                 $ret['nurl']        = Strings::normaliseLink($ret['url']);
2882                 $ret['updated']     = $updated;
2883                 $ret['failed']      = false;
2884                 $ret['next-update'] = $success_next_update;
2885                 $ret['local-data']  = $has_local_data;
2886
2887                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2888                 if (empty($pubkey) && !empty($new_pubkey)) {
2889                         $ret['pubkey'] = $new_pubkey;
2890                 }
2891
2892                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2893                         $ret['uri-date'] = $updated;
2894                 }
2895
2896                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2897                         $ret['name-date'] = $updated;
2898                 }
2899
2900                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2901                         $ret['last-update'] = $updated;
2902                         $ret['success_update'] = $updated;
2903                 }
2904
2905                 unset($ret['photo']);
2906
2907                 self::updateContact($id, $uid, $ret['uri-id'], $ret['url'], $ret);
2908
2909                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2910                         Worker::add(Worker::PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2911                 }
2912
2913                 return true;
2914         }
2915
2916         private static function updateFromPublicContact(int $id, array $contact)
2917         {
2918                 $public = self::getByURL($contact['url'], false);
2919
2920                 $fields = [];
2921
2922                 foreach ($contact as $field => $value) {
2923                         if ($field == 'uid') {
2924                                 continue;
2925                         }
2926                         if ($public[$field] != $value) {
2927                                 $fields[$field] = $public[$field];
2928                         }
2929                 }
2930                 if (!empty($fields)) {
2931                         self::update($fields, ['id' => $id, 'self' => false]);
2932                         Logger::info('Updating local contact', ['id' => $id]);
2933                 }
2934         }
2935
2936         /**
2937          * Updates contact record by provided URL
2938          *
2939          * @param integer $url contact url
2940          * @return integer Contact id
2941          * @throws HTTPException\InternalServerErrorException
2942          * @throws \ImagickException
2943          */
2944         public static function updateFromProbeByURL(string $url): int
2945         {
2946                 $id = self::getIdForURL($url);
2947
2948                 if (empty($id)) {
2949                         return $id;
2950                 }
2951
2952                 self::updateFromProbe($id);
2953
2954                 return $id;
2955         }
2956
2957         /**
2958          * Detects the communication protocol for a given contact url.
2959          * This is used to detect Friendica contacts that we can communicate via AP.
2960          *
2961          * @param string $url contact url
2962          * @param string $network Network of that contact
2963          * @return string with protocol
2964          */
2965         public static function getProtocol(string $url, string $network): string
2966         {
2967                 if ($network != Protocol::DFRN) {
2968                         return $network;
2969                 }
2970
2971                 $apcontact = APContact::getByURL($url);
2972                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2973                         return Protocol::ACTIVITYPUB;
2974                 } else {
2975                         return $network;
2976                 }
2977         }
2978
2979         /**
2980          * Takes a $uid and a url/handle and adds a new contact
2981          *
2982          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2983          * dfrn_request page.
2984          *
2985          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2986          *
2987          * Returns an array
2988          * $return['success'] boolean true if successful
2989          * $return['message'] error text if success is false.
2990          *
2991          * Takes a $uid and a url/handle and adds a new contact
2992          *
2993          * @param int    $uid         The user id the contact should be created for
2994          * @param string $url         The profile URL of the contact
2995          * @param string $network
2996          * @return array
2997          * @throws HTTPException\InternalServerErrorException
2998          * @throws HTTPException\NotFoundException
2999          * @throws \ImagickException
3000          */
3001         public static function createFromProbeForUser(int $uid, string $url, string $network = ''): array
3002         {
3003                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
3004
3005                 // remove ajax junk, e.g. Twitter
3006                 $url = str_replace('/#!/', '/', $url);
3007
3008                 if (!Network::isUrlAllowed($url)) {
3009                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
3010                         return $result;
3011                 }
3012
3013                 if (Network::isUrlBlocked($url)) {
3014                         $result['message'] = DI::l10n()->t('Blocked domain');
3015                         return $result;
3016                 }
3017
3018                 if (!$url) {
3019                         $result['message'] = DI::l10n()->t('Connect URL missing.');
3020                         return $result;
3021                 }
3022
3023                 $arr = ['url' => $url, 'uid' => $uid, 'contact' => []];
3024
3025                 Hook::callAll('follow', $arr);
3026
3027                 if (empty($arr)) {
3028                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
3029                         return $result;
3030                 }
3031
3032                 if (!empty($arr['contact']['name'])) {
3033                         $probed = false;
3034                         $ret = $arr['contact'];
3035                 } else {
3036                         $probed = true;
3037                         $ret = Probe::uri($url, $network, $uid);
3038
3039                         // Ensure that the public contact exists
3040                         if ($ret['network'] != Protocol::PHANTOM) {
3041                                 self::getIdForURL($url);
3042                         }
3043                 }
3044
3045                 if (($network != '') && ($ret['network'] != $network)) {
3046                         $result['message'] = DI::l10n()->t('Expected network %s does not match actual network %s', $network, $ret['network']);
3047                         return $result;
3048                 }
3049
3050                 // check if we already have a contact
3051                 $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'deleted' => false];
3052                 $contact = DBA::selectFirst('contact', ['id', 'rel', 'url', 'pending', 'hub-verify'], $condition);
3053
3054                 $protocol = self::getProtocol($ret['url'], $ret['network']);
3055
3056                 // This extra param just confuses things, remove it
3057                 if ($protocol === Protocol::DIASPORA) {
3058                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
3059                 }
3060
3061                 // do we have enough information?
3062                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
3063                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . '<br />';
3064                         if (empty($ret['poll'])) {
3065                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . '<br />';
3066                         }
3067                         if (empty($ret['name'])) {
3068                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . '<br />';
3069                         }
3070                         if (empty($ret['url'])) {
3071                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . '<br />';
3072                         }
3073                         if (strpos($ret['url'], '@') !== false) {
3074                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . '<br />';
3075                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . '<br />';
3076                         }
3077                         return $result;
3078                 }
3079
3080                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
3081                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . '<br />';
3082                         $ret['notify'] = '';
3083                 }
3084
3085                 if (!$ret['notify']) {
3086                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . '<br />';
3087                 }
3088
3089                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
3090
3091                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
3092
3093                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
3094
3095                 $pending = false;
3096                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
3097                         $pending = (bool)$ret['manually-approve'];
3098                 }
3099
3100                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
3101                         $writeable = 1;
3102                 }
3103
3104                 if (DBA::isResult($contact)) {
3105                         // update contact
3106                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
3107
3108                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false, 'network' => $ret['network']];
3109
3110                         if ($contact['pending'] && !empty($contact['hub-verify'])) {
3111                                 ActivityPub\Transmitter::sendContactAccept($contact['url'], $contact['hub-verify'], $uid);
3112                                 $fields['pending'] = false;
3113                         }
3114
3115                         self::update($fields, ['id' => $contact['id']]);
3116                 } else {
3117                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
3118
3119                         // create contact record
3120                         self::insert([
3121                                 'uid'          => $uid,
3122                                 'created'      => DateTimeFormat::utcNow(),
3123                                 'url'          => $ret['url'],
3124                                 'nurl'         => Strings::normaliseLink($ret['url']),
3125                                 'addr'         => $ret['addr'],
3126                                 'alias'        => $ret['alias'],
3127                                 'batch'        => $ret['batch'],
3128                                 'notify'       => $ret['notify'],
3129                                 'poll'         => $ret['poll'],
3130                                 'poco'         => $ret['poco'],
3131                                 'name'         => $ret['name'],
3132                                 'nick'         => $ret['nick'],
3133                                 'network'      => $ret['network'],
3134                                 'baseurl'      => $ret['baseurl'],
3135                                 'gsid'         => $ret['gsid'] ?? null,
3136                                 'contact-type' => $ret['account-type'] ?? self::TYPE_PERSON,
3137                                 'protocol'     => $protocol,
3138                                 'pubkey'       => $ret['pubkey'],
3139                                 'rel'          => $new_relation,
3140                                 'priority'     => $ret['priority'],
3141                                 'writable'     => $writeable,
3142                                 'hidden'       => $hidden,
3143                                 'blocked'      => 0,
3144                                 'readonly'     => 0,
3145                                 'pending'      => $pending,
3146                                 'subhub'       => $subhub
3147                         ]);
3148                 }
3149
3150                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
3151                 if (!DBA::isResult($contact)) {
3152                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . '<br />';
3153                         return $result;
3154                 }
3155
3156                 $contact_id = $contact['id'];
3157                 $result['cid'] = $contact_id;
3158
3159                 if ($contact['contact-type'] == self::TYPE_COMMUNITY) {
3160                         Circle::addMember(User::getDefaultGroupCircle($uid), $contact_id);
3161                 } else {
3162                         Circle::addMember(User::getDefaultCircle($uid), $contact_id);
3163                 }
3164
3165                 // Update the avatar
3166                 self::updateAvatar($contact_id, $ret['photo']);
3167
3168                 // pull feed and consume it, which should subscribe to the hub.
3169                 if ($contact['network'] == Protocol::OSTATUS) {
3170                         Worker::add(Worker::PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
3171                 }
3172
3173                 if ($probed) {
3174                         self::updateFromProbeArray($contact_id, $ret);
3175                 } else {
3176                         try {
3177                                 UpdateContact::add(Worker::PRIORITY_HIGH, $contact['id']);
3178                         } catch (\InvalidArgumentException $e) {
3179                                 Logger::notice($e->getMessage(), ['contact' => $contact]);
3180                         }
3181                 }
3182
3183                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
3184
3185                 return $result;
3186         }
3187
3188         /**
3189          * @param array  $importer Owner (local user) data
3190          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
3191          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
3192          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
3193          * @param string $note     Introduction additional message
3194          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
3195          * @throws HTTPException\InternalServerErrorException
3196          * @throws \ImagickException
3197          */
3198         public static function addRelationship(array $importer, array $contact, array $datarray, bool $sharing = false, string $note = '')
3199         {
3200                 // Should always be set
3201                 if (empty($datarray['author-id'])) {
3202                         return false;
3203                 }
3204
3205                 $fields = ['id', 'url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked', 'baseurl'];
3206                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
3207                 if (!DBA::isResult($pub_contact)) {
3208                         // Should never happen
3209                         return false;
3210                 }
3211
3212                 // Contact is blocked at node-level
3213                 if (self::isBlocked($datarray['author-id'])) {
3214                         return false;
3215                 }
3216
3217                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
3218                 $name = $pub_contact['name'];
3219                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
3220                 $nick = $pub_contact['nick'];
3221                 $network = $pub_contact['network'];
3222
3223                 // Ensure that we don't create a new contact when there already is one
3224                 $cid = self::getIdForURL($url, $importer['uid']);
3225                 if (!empty($cid)) {
3226                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
3227                 }
3228
3229                 self::clearFollowerFollowingEndpointCache($importer['uid']);
3230
3231                 if (!empty($contact)) {
3232                         if (!empty($contact['pending'])) {
3233                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
3234                                 return null;
3235                         }
3236
3237                         // Contact is blocked at user-level
3238                         if (
3239                                 !empty($contact['id']) && !empty($importer['id']) &&
3240                                 Contact\User::isBlocked($contact['id'], $importer['id'])
3241                         ) {
3242                                 return false;
3243                         }
3244
3245                         // Make sure that the existing contact isn't archived
3246                         self::unmarkForArchival($contact);
3247
3248                         if (($contact['rel'] == self::SHARING)
3249                                 || ($sharing && $contact['rel'] == self::FOLLOWER)
3250                         ) {
3251                                 self::update(
3252                                         ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
3253                                         ['id' => $contact['id'], 'uid' => $importer['uid']]
3254                                 );
3255                         }
3256
3257                         // Ensure to always have the correct network type, independent from the connection request method
3258                         self::updateFromProbe($contact['id']);
3259
3260                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
3261
3262                         return true;
3263                 } else {
3264                         // send email notification to owner?
3265                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
3266                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
3267                                 return null;
3268                         }
3269
3270                         // create contact record
3271                         $contact_id = self::insert([
3272                                 'uid'      => $importer['uid'],
3273                                 'created'  => DateTimeFormat::utcNow(),
3274                                 'url'      => $url,
3275                                 'nurl'     => Strings::normaliseLink($url),
3276                                 'baseurl'  => $pub_contact['baseurl'] ?? '',
3277                                 'name'     => $name,
3278                                 'nick'     => $nick,
3279                                 'network'  => $network,
3280                                 'rel'      => self::FOLLOWER,
3281                                 'blocked'  => 0,
3282                                 'readonly' => 0,
3283                                 'pending'  => 1,
3284                                 'writable' => 1,
3285                         ]);
3286
3287                         // Ensure to always have the correct network type, independent from the connection request method
3288                         self::updateFromProbe($contact_id);
3289
3290                         self::updateAvatar($contact_id, $photo, true);
3291
3292                         Post\UserNotification::insertNotification($pub_contact['id'], Activity::FOLLOW, $importer['uid']);
3293
3294                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo', 'contact-type'], ['id' => $contact_id]);
3295
3296                         /// @TODO Encapsulate this into a function/method
3297                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
3298                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
3299                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
3300                                 // create notification
3301                                 if (is_array($contact_record)) {
3302                                         $intro = DI::introFactory()->createNew(
3303                                                 $importer['uid'],
3304                                                 $contact_record['id'],
3305                                                 $note
3306                                         );
3307                                         DI::intro()->save($intro);
3308                                 }
3309
3310                                 if ($contact_record['contact-type'] == self::TYPE_COMMUNITY) {
3311                                         Circle::addMember(User::getDefaultGroupCircle($importer['uid']), $contact_record['id']);
3312                                 } else {
3313                                         Circle::addMember(User::getDefaultCircle($importer['uid']), $contact_record['id']);
3314                                 }
3315
3316                                 if (($user['notify-flags'] & Notification\Type::INTRO) && $user['page-flags'] == User::PAGE_FLAGS_NORMAL) {
3317                                         DI::notify()->createFromArray([
3318                                                 'type'  => Notification\Type::INTRO,
3319                                                 'otype' => Notification\ObjectType::INTRO,
3320                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
3321                                                 'uid'   => $user['uid'],
3322                                                 'cid'   => $contact_record['id'],
3323                                                 'link'  => DI::baseUrl() . '/notifications/intros',
3324                                         ]);
3325                                 }
3326                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
3327                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
3328                                         self::createFromProbeForUser($importer['uid'], $url, $network);
3329                                 }
3330
3331                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
3332                                 $fields = ['pending' => false];
3333                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
3334                                         $fields['rel'] = self::FRIEND;
3335                                 }
3336
3337                                 self::update($fields, $condition);
3338
3339                                 return true;
3340                         }
3341                 }
3342
3343                 return null;
3344         }
3345
3346         /**
3347          * Update the local relationship when a local user loses a follower
3348          *
3349          * @param array $contact User-specific contact (uid != 0) array
3350          * @return void
3351          * @throws HTTPException\InternalServerErrorException
3352          * @throws \ImagickException
3353          */
3354         public static function removeFollower(array $contact)
3355         {
3356                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
3357                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
3358                 } elseif (!empty($contact['id'])) {
3359                         self::remove($contact['id']);
3360                 } else {
3361                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
3362                         return;
3363                 }
3364
3365                 Worker::add(Worker::PRIORITY_LOW, 'ContactDiscoveryForUser', $contact['uid']);
3366
3367                 self::clearFollowerFollowingEndpointCache($contact['uid']);
3368
3369                 $cdata = self::getPublicAndUserContactID($contact['id'], $contact['uid']);
3370                 if (!empty($cdata['public'])) {
3371                         DI::notification()->deleteForUserByVerb($contact['uid'], Activity::FOLLOW, ['actor-id' => $cdata['public']]);
3372                 }
3373         }
3374
3375         /**
3376          * Update the local relationship when a local user unfollow a contact.
3377          * Removes the contact for sharing-only protocols (feed and mail).
3378          *
3379          * @param array $contact User-specific contact (uid != 0) array
3380          * @throws HTTPException\InternalServerErrorException
3381          */
3382         public static function removeSharer(array $contact)
3383         {
3384                 self::clearFollowerFollowingEndpointCache($contact['uid']);
3385
3386                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
3387                         self::remove($contact['id']);
3388                 } else {
3389                         self::update(['rel' => self::FOLLOWER, 'pending' => false], ['id' => $contact['id']]);
3390                 }
3391
3392                 Worker::add(Worker::PRIORITY_LOW, 'ContactDiscoveryForUser', $contact['uid']);
3393         }
3394
3395         /**
3396          * Create a birthday event.
3397          *
3398          * Update the year and the birthday.
3399          */
3400         public static function updateBirthdays()
3401         {
3402                 $condition = [
3403                         '`bd` > ?
3404                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
3405                         AND NOT `contact`.`pending`
3406                         AND NOT `contact`.`hidden`
3407                         AND NOT `contact`.`blocked`
3408                         AND NOT `contact`.`archive`
3409                         AND NOT `contact`.`deleted`',
3410                         DBA::NULL_DATE,
3411                         self::SHARING,
3412                         self::FRIEND
3413                 ];
3414
3415                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
3416
3417                 while ($contact = DBA::fetch($contacts)) {
3418                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
3419
3420                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
3421
3422                         if (Event::createBirthday($contact, $nextbd)) {
3423                                 // update bdyear
3424                                 DBA::update(
3425                                         'contact',
3426                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
3427                                         ['id' => $contact['id']]
3428                                 );
3429                         }
3430                 }
3431                 DBA::close($contacts);
3432         }
3433
3434         /**
3435          * Remove the unavailable contact ids from the provided list
3436          *
3437          * @param array $contact_ids Contact id list
3438          * @return array
3439          * @throws \Exception
3440          */
3441         public static function pruneUnavailable(array $contact_ids): array
3442         {
3443                 if (empty($contact_ids)) {
3444                         return [];
3445                 }
3446
3447                 $contacts = self::selectToArray(['id'], [
3448                         'id'      => $contact_ids,
3449                         'blocked' => false,
3450                         'pending' => false,
3451                         'archive' => false,
3452                 ]);
3453
3454                 return array_column($contacts, 'id');
3455         }
3456
3457         /**
3458          * Returns a magic link to authenticate remote visitors
3459          *
3460          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
3461          *
3462          * @param string $contact_url The address of the target contact profile
3463          * @param string $url         An url that we will be redirected to after the authentication
3464          *
3465          * @return string with "redir" link
3466          * @throws HTTPException\InternalServerErrorException
3467          * @throws \ImagickException
3468          */
3469         public static function magicLink(string $contact_url, string $url = ''): string
3470         {
3471                 if (!DI::userSession()->isAuthenticated()) {
3472                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
3473                 }
3474
3475                 $contact = self::getByURL($contact_url, false);
3476                 if (empty($contact)) {
3477                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
3478                 }
3479
3480                 // Prevents endless loop in case only a non-public contact exists for the contact URL
3481                 unset($contact['uid']);
3482
3483                 return self::magicLinkByContact($contact, $url ?: $contact_url);
3484         }
3485
3486         /**
3487          * Returns a magic link to authenticate remote visitors
3488          *
3489          * @param integer $cid The contact id of the target contact profile
3490          * @param string  $url An url that we will be redirected to after the authentication
3491          *
3492          * @return string with "redir" link
3493          * @throws HTTPException\InternalServerErrorException
3494          * @throws \ImagickException
3495          */
3496         public static function magicLinkById(int $cid, string $url = ''): string
3497         {
3498                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'alias', 'uid'], ['id' => $cid]);
3499
3500                 return self::magicLinkByContact($contact, $url);
3501         }
3502
3503         /**
3504          * Returns a magic link to authenticate remote visitors
3505          *
3506          * @param array  $contact The contact array with "uid", "network" and "url"
3507          * @param string $url     An url that we will be redirected to after the authentication
3508          *
3509          * @return string with "redir" link
3510          * @throws HTTPException\InternalServerErrorException
3511          * @throws \ImagickException
3512          */
3513         public static function magicLinkByContact(array $contact, string $url = ''): string
3514         {
3515                 $destination = $url ?: (!Network::isValidHttpUrl($contact['url']) && !empty($contact['alias']) && Network::isValidHttpUrl($contact['alias']) ? $contact['alias'] : $contact['url']);
3516
3517                 if (!DI::userSession()->isAuthenticated()) {
3518                         return $destination;
3519                 }
3520
3521                 // Only redirections to the same host do make sense
3522                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
3523                         return $url;
3524                 }
3525
3526                 if (DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'stay_local') && ($url == '')) {
3527                         return 'contact/' . $contact['id'] . '/conversations';
3528                 }
3529
3530                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
3531                         return $destination;
3532                 }
3533
3534                 if (empty($contact['id'])) {
3535                         return $destination;
3536                 }
3537
3538                 $redirect = 'contact/redir/' . $contact['id'];
3539
3540                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
3541                         $redirect .= '?url=' . $url;
3542                 }
3543
3544                 return $redirect;
3545         }
3546
3547         /**
3548          * Is the contact a group?
3549          *
3550          * @param integer $contactid ID of the contact
3551          *
3552          * @return boolean "true" if it is a group
3553          */
3554         public static function isGroup(int $contactid): bool
3555         {
3556                 $fields = ['contact-type'];
3557                 $condition = ['id' => $contactid];
3558                 $contact = DBA::selectFirst('contact', $fields, $condition);
3559                 if (!DBA::isResult($contact)) {
3560                         return false;
3561                 }
3562
3563                 // Is it a group?
3564                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
3565         }
3566
3567         /**
3568          * Can the remote contact receive private messages?
3569          *
3570          * @param array $contact
3571          * @return bool
3572          */
3573         public static function canReceivePrivateMessages(array $contact): bool
3574         {
3575                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
3576                 $self = $contact['self'] ?? false;
3577
3578                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
3579         }
3580
3581         /**
3582          * Search contact table by nick or name
3583          *
3584          * @param string $search       Name or nick
3585          * @param string $mode         Search mode (e.g. "community")
3586          * @param bool   $show_blocked Show users from blocked servers. Default is false
3587          * @param int    $uid          User ID
3588          * @param int    $limit        Maximum amount of returned values
3589          * @param int    $offset       Limit offset
3590          *
3591          * @return array with search results
3592          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3593          */
3594         public static function searchByName(string $search, string $mode = '', bool $show_blocked = false, int $uid = 0, int $limit = 0, int $offset = 0): array
3595         {
3596                 if (empty($search)) {
3597                         return [];
3598                 }
3599
3600                 // check supported networks
3601                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
3602                 if (DI::config()->get('system', 'diaspora_enabled')) {
3603                         $networks[] = Protocol::DIASPORA;
3604                 }
3605
3606                 if (!DI::config()->get('system', 'ostatus_disabled')) {
3607                         $networks[] = Protocol::OSTATUS;
3608                 }
3609
3610                 $condition = [
3611                         'network'        => $networks,
3612                         'server-failed'  => false,
3613                         'failed'         => false,
3614                         'deleted'        => false,
3615                         'unsearchable'   => false,
3616                         'uid'            => $uid
3617                 ];
3618
3619                 if (!$show_blocked) {
3620                         $condition['server-blocked'] = true;
3621                 }
3622
3623                 if ($uid == 0) {
3624                         $condition['blocked'] = false;
3625                 } else {
3626                         $condition['rel'] = [Contact::SHARING, Contact::FRIEND];
3627                 }
3628
3629                 // check if we search only communities or every contact
3630                 if ($mode === 'community') {
3631                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3632                 }
3633
3634                 $search .= '%';
3635
3636                 $params = [];
3637
3638                 if (!empty($limit) && !empty($offset)) {
3639                         $params['limit'] = [$offset, $limit];
3640                 } elseif (!empty($limit)) {
3641                         $params['limit'] = $limit;
3642                 }
3643
3644                 $condition = DBA::mergeConditions(
3645                         $condition,
3646                         ["(`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]
3647                 );
3648
3649                 return DBA::selectToArray('account-user-view', [], $condition, $params);
3650         }
3651
3652         /**
3653          * Add public contacts from an array
3654          *
3655          * @param array $urls
3656          * @return array result "count", "added" and "updated"
3657          */
3658         public static function addByUrls(array $urls): array
3659         {
3660                 $added = 0;
3661                 $updated = 0;
3662                 $unchanged = 0;
3663                 $count = 0;
3664
3665                 foreach ($urls as $url) {
3666                         if (empty($url) || !is_string($url)) {
3667                                 continue;
3668                         }
3669                         $contact = self::getByURL($url, false, ['id', 'network', 'next-update']);
3670                         if (empty($contact['id']) && Network::isValidHttpUrl($url)) {
3671                                 Worker::add(Worker::PRIORITY_LOW, 'AddContact', 0, $url);
3672                                 ++$added;
3673                         } elseif (!empty($contact['network']) && Protocol::supportsProbe($contact['network']) && ($contact['next-update'] < DateTimeFormat::utcNow())) {
3674                                 try {
3675                                         UpdateContact::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], $contact['id']);
3676                                         ++$updated;
3677                                 } catch (\InvalidArgumentException $e) {
3678                                         Logger::notice($e->getMessage(), ['contact' => $contact]);
3679                                 }
3680                         } else {
3681                                 ++$unchanged;
3682                         }
3683                         ++$count;
3684                 }
3685
3686                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3687         }
3688
3689         /**
3690          * Returns a random, global contact array of the current node
3691          *
3692          * @return array The profile array
3693          * @throws Exception
3694          */
3695         public static function getRandomContact(): array
3696         {
3697                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'alias', 'uid'], [
3698                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3699                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3700                 ], ['order' => ['RAND()']]);
3701
3702                 if (DBA::isResult($contact)) {
3703                         return $contact;
3704                 }
3705
3706                 return [];
3707         }
3708
3709         /**
3710          * Checks, if contacts with the given condition exists
3711          *
3712          * @param array $condition
3713          *
3714          * @return bool
3715          * @throws \Exception
3716          */
3717         public static function exists(array $condition): bool
3718         {
3719                 return DBA::exists('contact', $condition);
3720         }
3721 }