src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\App\BaseURL;
  25 use Friendica\Contact\Introduction\Exception\IntroductionNotFoundException;
  26 use Friendica\Content\Pager;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Renderer;
  32 use Friendica\Core\Session;
  33 use Friendica\Core\System;
  34 use Friendica\Core\Worker;
  35 use Friendica\Database\Database;
  36 use Friendica\Database\DBA;
  37 use Friendica\DI;
  38 use Friendica\Network\HTTPException;
  39 use Friendica\Network\Probe;
  40 use Friendica\Protocol\Activity;
  41 use Friendica\Protocol\ActivityPub;
  42 use Friendica\Protocol\Diaspora;
  43 use Friendica\Protocol\OStatus;
  44 use Friendica\Protocol\Salmon;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50
  51 /**
  52  * functions for interacting with a contact
  53  */
  54 class Contact
  55 {
  56         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  57         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  58         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  59
  60         /**
  61          * @}
  62          */
  63
  64         const LOCK_INSERT = 'contact-insert';
  65
  66         /**
  67          * Account types
  68          *
  69          * TYPE_UNKNOWN - unknown type
  70          *
  71          * TYPE_PERSON - the account belongs to a person
  72          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  73          *
  74          * TYPE_ORGANISATION - the account belongs to an organisation
  75          *      Associated page type: PAGE_SOAPBOX
  76          *
  77          * TYPE_NEWS - the account is a news reflector
  78          *      Associated page type: PAGE_SOAPBOX
  79          *
  80          * TYPE_COMMUNITY - the account is community forum
  81          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
  82          *
  83          * TYPE_RELAY - the account is a relay
  84          *      This will only be assigned to contacts, not to user accounts
  85          * @{
  86          */
  87         const TYPE_UNKNOWN =     -1;
  88         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
  89         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
  90         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
  91         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
  92         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
  93         /**
  94          * @}
  95          */
  96
  97         /**
  98          * Contact_is
  99          *
 100          * Relationship types
 101          * @{
 102          */
 103         const NOTHING  = 0;
 104         const FOLLOWER = 1;
 105         const SHARING  = 2;
 106         const FRIEND   = 3;
 107         const SELF     = 4;
 108         /**
 109          * @}
 110          */
 111
 112          const MIRROR_DEACTIVATED = 0;
 113          const MIRROR_FORWARDED = 1;
 114          const MIRROR_OWN_POST = 2;
 115          const MIRROR_NATIVE_RESHARE = 3;
 116
 117          /**
 118          * @param array $fields    Array of selected fields, empty for all
 119          * @param array $condition Array of fields for condition
 120          * @param array $params    Array of several parameters
 121          * @return array
 122          * @throws \Exception
 123          */
 124         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 125         {
 126                 return DBA::selectToArray('contact', $fields, $condition, $params);
 127         }
 128
 129         /**
 130          * @param array $fields    Array of selected fields, empty for all
 131          * @param array $condition Array of fields for condition
 132          * @param array $params    Array of several parameters
 133          * @return array
 134          * @throws \Exception
 135          */
 136         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 137         {
 138                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 139
 140                 return $contact;
 141         }
 142
 143         /**
 144          * Insert a row into the contact table
 145          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 146          *
 147          * @param array $fields         field array
 148          * @param int   $duplicate_mode Do an update on a duplicate entry
 149          *
 150          * @return int  id of the created contact
 151          * @throws \Exception
 152          */
 153         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 154         {
 155                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 156                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 157                 }
 158
 159                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 160
 161                 if (empty($fields['created'])) {
 162                         $fields['created'] = DateTimeFormat::utcNow();
 163                 }
 164
 165                 DBA::insert('contact', $fields, $duplicate_mode);
 166                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 167                 if (!DBA::isResult($contact)) {
 168                         // Shouldn't happen
 169                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 170                         return 0;
 171                 }
 172
 173                 Contact\User::insertForContactArray($contact);
 174
 175                 // Search for duplicated contacts and get rid of them
 176                 if (!$contact['self']) {
 177                         self::removeDuplicates($contact['nurl'], $contact['uid']);
 178                 }
 179
 180                 return $contact['id'];
 181         }
 182
 183         /**
 184          * Updates rows in the contact table
 185          *
 186          * @param array         $fields     contains the fields that are updated
 187          * @param array         $condition  condition array with the key values
 188          * @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)
 189          *
 190          * @return boolean was the update successfull?
 191          * @throws \Exception
 192          */
 193         public static function update(array $fields, array $condition, $old_fields = [])
 194         {
 195                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 196
 197                 // Apply changes to the "user-contact" table on dedicated fields
 198                 Contact\User::updateByContactUpdate($fields, $condition);
 199
 200                 return $ret;
 201         }
 202
 203         /**
 204          * @param integer $id     Contact ID
 205          * @param array   $fields Array of selected fields, empty for all
 206          * @return array|boolean Contact record if it exists, false otherwise
 207          * @throws \Exception
 208          */
 209         public static function getById($id, $fields = [])
 210         {
 211                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 212         }
 213
 214         /**
 215          * Fetch the first contact with the provided uri-id.
 216          *
 217          * @param integer $uri_id uri-id of the contact
 218          * @param array   $fields Array of selected fields, empty for all
 219          * @return array|boolean Contact record if it exists, false otherwise
 220          * @throws \Exception
 221          */
 222         public static function getByUriId($uri_id, $fields = [])
 223         {
 224                 return DBA::selectFirst('contact', $fields, ['uri-id' => $uri_id], ['order' => ['uid']]);
 225         }
 226
 227         /**
 228          * Fetches a contact by a given url
 229          *
 230          * @param string  $url    profile url
 231          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 232          * @param array   $fields Field list
 233          * @param integer $uid    User ID of the contact
 234          * @return array contact array
 235          */
 236         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 237         {
 238                 if ($update || is_null($update)) {
 239                         $cid = self::getIdForURL($url, $uid, $update);
 240                         if (empty($cid)) {
 241                                 return [];
 242                         }
 243
 244                         $contact = self::getById($cid, $fields);
 245                         if (empty($contact)) {
 246                                 return [];
 247                         }
 248                         return $contact;
 249                 }
 250
 251                 // Add internal fields
 252                 $removal = [];
 253                 if (!empty($fields)) {
 254                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 255                                 if (!in_array($internal, $fields)) {
 256                                         $fields[] = $internal;
 257                                         $removal[] = $internal;
 258                                 }
 259                         }
 260                 }
 261
 262                 // We first try the nurl (http://server.tld/nick), most common case
 263                 $options = ['order' => ['id']];
 264                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 265
 266                 // Then the addr (nick@server.tld)
 267                 if (!DBA::isResult($contact)) {
 268                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 269                 }
 270
 271                 // Then the alias (which could be anything)
 272                 if (!DBA::isResult($contact)) {
 273                         // The link could be provided as http although we stored it as https
 274                         $ssl_url = str_replace('http://', 'https://', $url);
 275                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 276                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 277                 }
 278
 279                 if (!DBA::isResult($contact)) {
 280                         return [];
 281                 }
 282
 283                 // Update the contact in the background if needed
 284                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 285                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 286                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 287                 }
 288
 289                 // Remove the internal fields
 290                 foreach ($removal as $internal) {
 291                         unset($contact[$internal]);
 292                 }
 293
 294                 return $contact;
 295         }
 296
 297         /**
 298          * Fetches a contact for a given user by a given url.
 299          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 300          *
 301          * @param string  $url    profile url
 302          * @param integer $uid    User ID of the contact
 303          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 304          * @param array   $fields Field list
 305          * @return array contact array
 306          */
 307         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 308         {
 309                 if ($uid != 0) {
 310                         $contact = self::getByURL($url, $update, $fields, $uid);
 311                         if (!empty($contact)) {
 312                                 if (!empty($contact['id'])) {
 313                                         $contact['cid'] = $contact['id'];
 314                                         $contact['zid'] = 0;
 315                                 }
 316                                 return $contact;
 317                         }
 318                 }
 319
 320                 $contact = self::getByURL($url, $update, $fields);
 321                 if (!empty($contact['id'])) {
 322                         $contact['cid'] = 0;
 323                         $contact['zid'] = $contact['id'];
 324                 }
 325                 return $contact;
 326         }
 327
 328         /**
 329          * Tests if the given contact is a follower
 330          *
 331          * @param int $cid Either public contact id or user's contact id
 332          * @param int $uid User ID
 333          *
 334          * @return boolean is the contact id a follower?
 335          * @throws HTTPException\InternalServerErrorException
 336          * @throws \ImagickException
 337          */
 338         public static function isFollower($cid, $uid)
 339         {
 340                 if (Contact\User::isBlocked($cid, $uid)) {
 341                         return false;
 342                 }
 343
 344                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 345                 if (empty($cdata['user'])) {
 346                         return false;
 347                 }
 348
 349                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 350                 return DBA::exists('contact', $condition);
 351         }
 352
 353         /**
 354          * Tests if the given contact url is a follower
 355          *
 356          * @param string $url Contact URL
 357          * @param int    $uid User ID
 358          *
 359          * @return boolean is the contact id a follower?
 360          * @throws HTTPException\InternalServerErrorException
 361          * @throws \ImagickException
 362          */
 363         public static function isFollowerByURL($url, $uid)
 364         {
 365                 $cid = self::getIdForURL($url, $uid);
 366
 367                 if (empty($cid)) {
 368                         return false;
 369                 }
 370
 371                 return self::isFollower($cid, $uid);
 372         }
 373
 374         /**
 375          * Tests if the given user follow the given contact
 376          *
 377          * @param int $cid Either public contact id or user's contact id
 378          * @param int $uid User ID
 379          *
 380          * @return boolean is the contact url being followed?
 381          * @throws HTTPException\InternalServerErrorException
 382          * @throws \ImagickException
 383          */
 384         public static function isSharing($cid, $uid)
 385         {
 386                 if (Contact\User::isBlocked($cid, $uid)) {
 387                         return false;
 388                 }
 389
 390                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 391                 if (empty($cdata['user'])) {
 392                         return false;
 393                 }
 394
 395                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 396                 return DBA::exists('contact', $condition);
 397         }
 398
 399         /**
 400          * Tests if the given user follow the given contact url
 401          *
 402          * @param string $url Contact URL
 403          * @param int    $uid User ID
 404          *
 405          * @return boolean is the contact url being followed?
 406          * @throws HTTPException\InternalServerErrorException
 407          * @throws \ImagickException
 408          */
 409         public static function isSharingByURL($url, $uid)
 410         {
 411                 $cid = self::getIdForURL($url, $uid);
 412
 413                 if (empty($cid)) {
 414                         return false;
 415                 }
 416
 417                 return self::isSharing($cid, $uid);
 418         }
 419
 420         /**
 421          * Get the basepath for a given contact link
 422          *
 423          * @param string $url The contact link
 424          * @param boolean $dont_update Don't update the contact
 425          *
 426          * @return string basepath
 427          * @throws HTTPException\InternalServerErrorException
 428          * @throws \ImagickException
 429          */
 430         public static function getBasepath($url, $dont_update = false)
 431         {
 432                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 433                 if (!DBA::isResult($contact)) {
 434                         return '';
 435                 }
 436
 437                 if (!empty($contact['baseurl'])) {
 438                         return $contact['baseurl'];
 439                 } elseif ($dont_update) {
 440                         return '';
 441                 }
 442
 443                 // Update the existing contact
 444                 self::updateFromProbe($contact['id']);
 445
 446                 // And fetch the result
 447                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 448                 if (empty($contact['baseurl'])) {
 449                         Logger::info('No baseurl for contact', ['url' => $url]);
 450                         return '';
 451                 }
 452
 453                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 454                 return $contact['baseurl'];
 455         }
 456
 457         /**
 458          * Check if the given contact url is on the same server
 459          *
 460          * @param string $url The contact link
 461          *
 462          * @return boolean Is it the same server?
 463          */
 464         public static function isLocal($url)
 465         {
 466                 if (!parse_url($url, PHP_URL_SCHEME)) {
 467                         $addr_parts = explode('@', $url);
 468                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 469                 }
 470
 471                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 472         }
 473
 474         /**
 475          * Check if the given contact ID is on the same server
 476          *
 477          * @param string $url The contact link
 478          *
 479          * @return boolean Is it the same server?
 480          */
 481         public static function isLocalById(int $cid)
 482         {
 483                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 484                 if (!DBA::isResult($contact)) {
 485                         return false;
 486                 }
 487
 488                 if (empty($contact['baseurl'])) {
 489                         $baseurl = self::getBasepath($contact['url'], true);
 490                 } else {
 491                         $baseurl = $contact['baseurl'];
 492                 }
 493
 494                 return Strings::compareLink($baseurl, DI::baseUrl());
 495         }
 496
 497         /**
 498          * Returns the public contact id of the given user id
 499          *
 500          * @param  integer $uid User ID
 501          *
 502          * @return integer|boolean Public contact id for given user id
 503          * @throws \Exception
 504          */
 505         public static function getPublicIdByUserId($uid)
 506         {
 507                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 508                 if (!DBA::isResult($self)) {
 509                         return false;
 510                 }
 511                 return self::getIdForURL($self['url']);
 512         }
 513
 514         /**
 515          * Returns the contact id for the user and the public contact id for a given contact id
 516          *
 517          * @param int $cid Either public contact id or user's contact id
 518          * @param int $uid User ID
 519          *
 520          * @return array with public and user's contact id
 521          * @throws HTTPException\InternalServerErrorException
 522          * @throws \ImagickException
 523          */
 524         public static function getPublicAndUserContactID($cid, $uid)
 525         {
 526                 // We have to use the legacy function as long as the post update hasn't finished
 527                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 528                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 529                 }
 530
 531                 if (empty($uid) || empty($cid)) {
 532                         return [];
 533                 }
 534
 535                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 536                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 537                         return [];
 538                 }
 539
 540                 $pcid = $contact['pid'];
 541                 if ($contact['uid'] == $uid) {
 542                         $ucid = $contact['id'];
 543                 } else {
 544                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 545                         if (DBA::isResult($contact)) {
 546                                 $ucid = $contact['id'];
 547                         } else {
 548                                 $ucid = 0;
 549                         }
 550                 }
 551
 552                 return ['public' => $pcid, 'user' => $ucid];
 553         }
 554
 555         /**
 556          * Helper function for "getPublicAndUserContactID"
 557          *
 558          * @param int $cid Either public contact id or user's contact id
 559          * @param int $uid User ID
 560          *
 561          * @return array with public and user's contact id
 562          * @throws HTTPException\InternalServerErrorException
 563          * @throws \ImagickException
 564          */
 565         private static function legacyGetPublicAndUserContactID($cid, $uid)
 566         {
 567                 if (empty($uid) || empty($cid)) {
 568                         return [];
 569                 }
 570
 571                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 572                 if (!DBA::isResult($contact)) {
 573                         return [];
 574                 }
 575
 576                 // We quit when the user id don't match the user id of the provided contact
 577                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 578                         return [];
 579                 }
 580
 581                 if ($contact['uid'] != 0) {
 582                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 583                         if (empty($pcid)) {
 584                                 return [];
 585                         }
 586                         $ucid = $contact['id'];
 587                 } else {
 588                         $pcid = $contact['id'];
 589                         $ucid = self::getIdForURL($contact['url'], $uid);
 590                 }
 591
 592                 return ['public' => $pcid, 'user' => $ucid];
 593         }
 594
 595         /**
 596          * Returns contact details for a given contact id in combination with a user id
 597          *
 598          * @param int $cid A contact ID
 599          * @param int $uid The User ID
 600          * @param array $fields The selected fields for the contact
 601          *
 602          * @return array The contact details
 603          *
 604          * @throws \Exception
 605          */
 606         public static function getContactForUser($cid, $uid, array $fields = [])
 607         {
 608                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 609
 610                 if (!DBA::isResult($contact)) {
 611                         return [];
 612                 } else {
 613                         return $contact;
 614                 }
 615         }
 616
 617         /**
 618          * Creates the self-contact for the provided user id
 619          *
 620          * @param int $uid
 621          * @return bool Operation success
 622          * @throws HTTPException\InternalServerErrorException
 623          */
 624         public static function createSelfFromUserId($uid)
 625         {
 626                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 627                         ['uid' => $uid, 'account_expired' => false]);
 628                 if (!DBA::isResult($user)) {
 629                         return false;
 630                 }
 631
 632                 $contact = [
 633                         'uid'         => $user['uid'],
 634                         'created'     => DateTimeFormat::utcNow(),
 635                         'self'        => 1,
 636                         'name'        => $user['username'],
 637                         'nick'        => $user['nickname'],
 638                         'pubkey'      => $user['pubkey'],
 639                         'prvkey'      => $user['prvkey'],
 640                         'photo'       => User::getAvatarUrl($user),
 641                         'thumb'       => User::getAvatarUrl($user, Proxy::SIZE_THUMB),
 642                         'micro'       => User::getAvatarUrl($user, Proxy::SIZE_MICRO),
 643                         'blocked'     => 0,
 644                         'pending'     => 0,
 645                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 646                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 647                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 648                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 649                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 650                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 651                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 652                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 653                         'name-date'   => DateTimeFormat::utcNow(),
 654                         'uri-date'    => DateTimeFormat::utcNow(),
 655                         'avatar-date' => DateTimeFormat::utcNow(),
 656                         'closeness'   => 0
 657                 ];
 658
 659                 $return = true;
 660
 661                 // Only create the entry if it doesn't exist yet
 662                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 663                         $return = (bool)self::insert($contact);
 664                 }
 665
 666                 // Create the public contact
 667                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 668                         $contact['self']   = false;
 669                         $contact['uid']    = 0;
 670                         $contact['prvkey'] = null;
 671
 672                         self::insert($contact, Database::INSERT_IGNORE);
 673                 }
 674
 675                 return $return;
 676         }
 677
 678         /**
 679          * Updates the self-contact for the provided user id
 680          *
 681          * @param int     $uid
 682          * @param boolean $update_avatar Force the avatar update
 683          * @return bool   "true" if updated
 684          * @throws HTTPException\InternalServerErrorException
 685          */
 686         public static function updateSelfFromUserID($uid, $update_avatar = false)
 687         {
 688                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 689                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 690                         'photo', 'thumb', 'micro', 'header', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 691                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 692                 if (!DBA::isResult($self)) {
 693                         return false;
 694                 }
 695
 696                 $fields = ['uid', 'nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 697                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 698                 if (!DBA::isResult($user)) {
 699                         return false;
 700                 }
 701
 702                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 703                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 704                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 705                 if (!DBA::isResult($profile)) {
 706                         return false;
 707                 }
 708
 709                 $file_suffix = 'jpg';
 710
 711                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 712                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 713                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 714                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 715                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'matrix' => $profile['matrix'], 'network' => Protocol::DFRN];
 716
 717                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 718                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 719                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 720                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 721                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 722                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 723                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 724                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 725                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 726
 727                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 728                 if (DBA::isResult($avatar)) {
 729                         if ($update_avatar) {
 730                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 731                         }
 732
 733                         // Creating the path to the avatar, beginning with the file suffix
 734                         $types = Images::supportedTypes();
 735                         if (isset($types[$avatar['type']])) {
 736                                 $file_suffix = $types[$avatar['type']];
 737                         }
 738
 739                         // We are adding a timestamp value so that other systems won't use cached content
 740                         $timestamp = strtotime($fields['avatar-date']);
 741
 742                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 743                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 744
 745                         $fields['photo'] = $prefix . '4' . $suffix;
 746                         $fields['thumb'] = $prefix . '5' . $suffix;
 747                         $fields['micro'] = $prefix . '6' . $suffix;
 748                 } else {
 749                         // We hadn't found a photo entry, so we use the default avatar
 750                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 751                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 752                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 753                 }
 754
 755                 $fields['avatar'] = User::getAvatarUrl($user);
 756                 $fields['header'] = User::getBannerUrl($user);
 757                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 758                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 759                 $fields['unsearchable'] = !$profile['net-publish'];
 760
 761                 $update = false;
 762
 763                 foreach ($fields as $field => $content) {
 764                         if ($self[$field] != $content) {
 765                                 $update = true;
 766                         }
 767                 }
 768
 769                 if ($update) {
 770                         if ($fields['name'] != $self['name']) {
 771                                 $fields['name-date'] = DateTimeFormat::utcNow();
 772                         }
 773                         $fields['updated'] = DateTimeFormat::utcNow();
 774                         self::update($fields, ['id' => $self['id']]);
 775
 776                         // Update the public contact as well
 777                         $fields['prvkey'] = null;
 778                         $fields['self']   = false;
 779                         self::update($fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 780
 781                         // Update the profile
 782                         $fields = [
 783                                 'photo' => User::getAvatarUrl($user),
 784                                 'thumb' => User::getAvatarUrl($user, Proxy::SIZE_THUMB)
 785                         ];
 786
 787                         DBA::update('profile', $fields, ['uid' => $uid]);
 788                 }
 789
 790                 return $update;
 791         }
 792
 793         /**
 794          * Marks a contact for removal
 795          *
 796          * @param int $id contact id
 797          * @throws HTTPException\InternalServerErrorException
 798          */
 799         public static function remove($id)
 800         {
 801                 // We want just to make sure that we don't delete our "self" contact
 802                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 803                 if (!DBA::isResult($contact)) {
 804                         return;
 805                 }
 806
 807                 // Archive the contact
 808                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 809
 810                 // Delete it in the background
 811                 Worker::add(PRIORITY_MEDIUM, 'Contact\Remove', $id);
 812         }
 813
 814         /**
 815          * Sends an unfriend message. Removes the contact for two-way unfriending or sharing only protocols (feed an mail)
 816          *
 817          * @param array   $user    User unfriending
 818          * @param array   $contact Contact (uid != 0) unfriended
 819          * @param boolean $two_way Revoke eventual inbound follow as well
 820          * @return bool|null true if successful, false if not, null if no remote action was performed
 821          * @throws HTTPException\InternalServerErrorException
 822          * @throws \ImagickException
 823          */
 824         public static function terminateFriendship(array $user, array $contact): ?bool
 825         {
 826                 $result = Protocol::terminateFriendship($user, $contact);
 827
 828                 if ($contact['rel'] == Contact::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
 829                         self::remove($contact['id']);
 830                 } else {
 831                         self::update(['rel' => Contact::FOLLOWER], ['id' => $contact['id']]);
 832                 }
 833
 834                 return $result;
 835         }
 836
 837         /**
 838          * Revoke follow privileges of the remote user contact
 839          *
 840          * @param array   $contact  Contact unfriended
 841          * @return bool|null Whether the remote operation is successful or null if no remote operation was performed
 842          * @throws HTTPException\InternalServerErrorException
 843          * @throws \ImagickException
 844          */
 845         public static function revokeFollow(array $contact): ?bool
 846         {
 847                 if (empty($contact['network'])) {
 848                         throw new \InvalidArgumentException('Empty network in contact array');
 849                 }
 850
 851                 if (empty($contact['uid'])) {
 852                         throw new \InvalidArgumentException('Unexpected public contact record');
 853                 }
 854
 855                 $result = Protocol::revokeFollow($contact);
 856
 857                 // A null value here means the remote network doesn't support explicit follow revocation, we can still
 858                 // break the locally recorded relationship
 859                 if ($result !== false) {
 860                         if ($contact['rel'] == self::FRIEND) {
 861                                 self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
 862                         } else {
 863                                 self::remove($contact['id']);
 864                         }
 865                 }
 866
 867                 return $result;
 868         }
 869
 870
 871         /**
 872          * Marks a contact for archival after a communication issue delay
 873          *
 874          * Contact has refused to recognise us as a friend. We will start a countdown.
 875          * If they still don't recognise us in 32 days, the relationship is over,
 876          * and we won't waste any more time trying to communicate with them.
 877          * This provides for the possibility that their database is temporarily messed
 878          * up or some other transient event and that there's a possibility we could recover from it.
 879          *
 880          * @param array $contact contact to mark for archival
 881          * @return null
 882          * @throws HTTPException\InternalServerErrorException
 883          */
 884         public static function markForArchival(array $contact)
 885         {
 886                 if (!isset($contact['url']) && !empty($contact['id'])) {
 887                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 888                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 889                         if (!DBA::isResult($contact)) {
 890                                 return;
 891                         }
 892                 } elseif (!isset($contact['url'])) {
 893                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 894                 }
 895
 896                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 897
 898                 // Contact already archived or "self" contact? => nothing to do
 899                 if ($contact['archive'] || $contact['self']) {
 900                         return;
 901                 }
 902
 903                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 904                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 905                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 906                 } else {
 907                         /* @todo
 908                          * We really should send a notification to the owner after 2-3 weeks
 909                          * so they won't be surprised when the contact vanishes and can take
 910                          * remedial action if this was a serious mistake or glitch
 911                          */
 912
 913                         /// @todo Check for contact vitality via probing
 914                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 915
 916                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 917                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 918                                 /* Relationship is really truly dead. archive them rather than
 919                                  * delete, though if the owner tries to unarchive them we'll start
 920                                  * the whole process over again.
 921                                  */
 922                                 self::update(['archive' => true], ['id' => $contact['id']]);
 923                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 924                         }
 925                 }
 926         }
 927
 928         /**
 929          * Cancels the archival countdown
 930          *
 931          * @see   Contact::markForArchival()
 932          *
 933          * @param array $contact contact to be unmarked for archival
 934          * @return null
 935          * @throws \Exception
 936          */
 937         public static function unmarkForArchival(array $contact)
 938         {
 939                 // Always unarchive the relay contact entry
 940                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 941                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 942                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 943                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 944                                 self::update($fields, $condition);
 945                         }
 946                 }
 947
 948                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 949                 $exists = DBA::exists('contact', $condition);
 950
 951                 // We don't need to update, we never marked this contact for archival
 952                 if (!$exists) {
 953                         return;
 954                 }
 955
 956                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 957
 958                 if (!isset($contact['url']) && !empty($contact['id'])) {
 959                         $fields = ['id', 'url', 'batch'];
 960                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 961                         if (!DBA::isResult($contact)) {
 962                                 return;
 963                         }
 964                 }
 965
 966                 // It's a miracle. Our dead contact has inexplicably come back to life.
 967                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 968                 self::update($fields, ['id' => $contact['id']]);
 969                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 970         }
 971
 972         /**
 973          * Returns the data array for the photo menu of a given contact
 974          *
 975          * @param array $contact contact
 976          * @param int   $uid     optional, default 0
 977          * @return array
 978          * @throws HTTPException\InternalServerErrorException
 979          * @throws \ImagickException
 980          */
 981         public static function photoMenu(array $contact, $uid = 0)
 982         {
 983                 $pm_url = '';
 984                 $status_link = '';
 985                 $photos_link = '';
 986                 $poke_link = '';
 987
 988                 if ($uid == 0) {
 989                         $uid = local_user();
 990                 }
 991
 992                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 993                         if ($uid == 0) {
 994                                 $profile_link = self::magicLinkByContact($contact);
 995                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 996
 997                                 return $menu;
 998                         }
 999
1000                         // Look for our own contact if the uid doesn't match and isn't public
1001                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1002                         if (DBA::isResult($contact_own)) {
1003                                 return self::photoMenu($contact_own, $uid);
1004                         }
1005                 }
1006
1007                 $sparkle = false;
1008                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1009                         $sparkle = true;
1010                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1011                 } else {
1012                         $profile_link = $contact['url'];
1013                 }
1014
1015                 if ($profile_link === 'mailbox') {
1016                         $profile_link = '';
1017                 }
1018
1019                 if ($sparkle) {
1020                         $status_link = $profile_link . '/status';
1021                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1022                         $profile_link = $profile_link . '/profile';
1023                 }
1024
1025                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1026                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1027                 }
1028
1029                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1030                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1031                 }
1032
1033                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1034
1035                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1036
1037                 $follow_link = '';
1038                 $unfollow_link = '';
1039                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1040                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1041                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1042                         } elseif(!$contact['pending']) {
1043                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1044                         }
1045                 }
1046
1047                 /**
1048                  * Menu array:
1049                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1050                  */
1051                 if (empty($contact['uid'])) {
1052                         $menu = [
1053                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1054                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1055                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1056                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1057                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1058                         ];
1059                 } else {
1060                         $menu = [
1061                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1062                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1063                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1064                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1065                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1066                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1067                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1068                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1069                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1070                         ];
1071
1072                         if (!empty($contact['pending'])) {
1073                                 try {
1074                                         $intro = DI::intro()->selectForContact($contact['id']);
1075                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1076                                 } catch (IntroductionNotFoundException $exception) {
1077                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1078                                 }
1079                         }
1080                 }
1081
1082                 $args = ['contact' => $contact, 'menu' => &$menu];
1083
1084                 Hook::callAll('contact_photo_menu', $args);
1085
1086                 $menucondensed = [];
1087
1088                 foreach ($menu as $menuname => $menuitem) {
1089                         if ($menuitem[1] != '') {
1090                                 $menucondensed[$menuname] = $menuitem;
1091                         }
1092                 }
1093
1094                 return $menucondensed;
1095         }
1096
1097         /**
1098          * Fetch the contact id for a given URL and user
1099          *
1100          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1101          * `addr` or `alias`.
1102          *
1103          * If there's no record and we aren't looking for a public contact, we quit.
1104          * If there's one, we check that it isn't time to update the picture else we
1105          * directly return the found contact id.
1106          *
1107          * Second, we probe the provided $url whether it's http://server.tld/profile or
1108          * nick@server.tld. We quit if we can't get any info back.
1109          *
1110          * Third, we create the contact record if it doesn't exist
1111          *
1112          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1113          * if there's any updates
1114          *
1115          * @param string  $url       Contact URL
1116          * @param integer $uid       The user id for the contact (0 = public contact)
1117          * @param boolean $update    true = always update, false = never update, null = update when not found
1118          * @param array   $default   Default value for creating the contact when everything else fails
1119          *
1120          * @return integer Contact ID
1121          * @throws HTTPException\InternalServerErrorException
1122          * @throws \ImagickException
1123          */
1124         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1125         {
1126                 $contact_id = 0;
1127
1128                 if ($url == '') {
1129                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1130                         return 0;
1131                 }
1132
1133                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1134
1135                 if (!empty($contact)) {
1136                         $contact_id = $contact["id"];
1137
1138                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1139                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1140                                 return $contact_id;
1141                         }
1142                 } elseif ($uid != 0) {
1143                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1144                         return 0;
1145                 } elseif (empty($default) && !is_null($update) && !$update) {
1146                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1147                         return 0;
1148                 }
1149
1150                 $data = [];
1151
1152                 if (empty($default['network']) || $update) {
1153                         $data = Probe::uri($url, "", $uid);
1154
1155                         // Take the default values when probing failed
1156                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1157                                 $data = array_merge($data, $default);
1158                         }
1159                 } elseif (!empty($default['network'])) {
1160                         $data = $default;
1161                 }
1162
1163                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1164                         // Fetch data for the public contact via the first found personal contact
1165                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1166                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1167                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1168                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1169
1170                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1171                         if (!DBA::isResult($personal_contact)) {
1172                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1173                         }
1174
1175                         if (DBA::isResult($personal_contact)) {
1176                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1177                                 $data = $personal_contact;
1178                                 $data['photo'] = $personal_contact['avatar'];
1179                                 $data['account-type'] = $personal_contact['contact-type'];
1180                                 $data['hide'] = $personal_contact['unsearchable'];
1181                                 unset($data['avatar']);
1182                                 unset($data['contact-type']);
1183                                 unset($data['unsearchable']);
1184                         }
1185                 }
1186
1187                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1188                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1189                         return 0;
1190                 }
1191
1192                 if (!$contact_id) {
1193                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1194                         if (!empty($data['alias'])) {
1195                                 $urls[] = Strings::normaliseLink($data['alias']);
1196                         }
1197                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1198                         if (!empty($contact['id'])) {
1199                                 $contact_id = $contact['id'];
1200                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1201                         }
1202                 }
1203
1204                 if (!$contact_id) {
1205                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1206                         $fields = [
1207                                 'uid'       => $uid,
1208                                 'url'       => $data['url'],
1209                                 'nurl'      => Strings::normaliseLink($data['url']),
1210                                 'network'   => $data['network'],
1211                                 'created'   => DateTimeFormat::utcNow(),
1212                                 'rel'       => self::SHARING,
1213                                 'writable'  => 1,
1214                                 'blocked'   => 0,
1215                                 'readonly'  => 0,
1216                                 'pending'   => 0];
1217
1218                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1219
1220                         // Before inserting we do check if the entry does exist now.
1221                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1222                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1223                                 if (DBA::isResult($contact)) {
1224                                         $contact_id = $contact['id'];
1225                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1226                                 } else {
1227                                         $contact_id = self::insert($fields);
1228                                         if ($contact_id) {
1229                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1230                                         }
1231                                 }
1232                                 DI::lock()->release(self::LOCK_INSERT);
1233                         } else {
1234                                 Logger::warning('Contact lock had not been acquired');
1235                         }
1236
1237                         if (!$contact_id) {
1238                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1239                                 return 0;
1240                         }
1241                 } else {
1242                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1243                 }
1244
1245                 if ($data['network'] == Protocol::DIASPORA) {
1246                         FContact::updateFromProbeArray($data);
1247                 }
1248
1249                 self::updateFromProbeArray($contact_id, $data);
1250
1251                 // Don't return a number for a deleted account
1252                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1253                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1254                         return 0;
1255                 }
1256
1257                 return $contact_id;
1258         }
1259
1260         /**
1261          * Checks if the contact is archived
1262          *
1263          * @param int $cid contact id
1264          *
1265          * @return boolean Is the contact archived?
1266          * @throws HTTPException\InternalServerErrorException
1267          */
1268         public static function isArchived(int $cid)
1269         {
1270                 if ($cid == 0) {
1271                         return false;
1272                 }
1273
1274                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1275                 if (!DBA::isResult($contact)) {
1276                         return false;
1277                 }
1278
1279                 if ($contact['archive']) {
1280                         return true;
1281                 }
1282
1283                 // Check status of ActivityPub endpoints
1284                 $apcontact = APContact::getByURL($contact['url'], false);
1285                 if (!empty($apcontact)) {
1286                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1287                                 return true;
1288                         }
1289
1290                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1291                                 return true;
1292                         }
1293                 }
1294
1295                 // Check status of Diaspora endpoints
1296                 if (!empty($contact['batch'])) {
1297                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1298                         return DBA::exists('contact', $condition);
1299                 }
1300
1301                 return false;
1302         }
1303
1304         /**
1305          * Checks if the contact is blocked
1306          *
1307          * @param int $cid contact id
1308          *
1309          * @return boolean Is the contact blocked?
1310          * @throws HTTPException\InternalServerErrorException
1311          */
1312         public static function isBlocked($cid)
1313         {
1314                 if ($cid == 0) {
1315                         return false;
1316                 }
1317
1318                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1319                 if (!DBA::isResult($blocked)) {
1320                         return false;
1321                 }
1322
1323                 if (Network::isUrlBlocked($blocked['url'])) {
1324                         return true;
1325                 }
1326
1327                 return (bool) $blocked['blocked'];
1328         }
1329
1330         /**
1331          * Checks if the contact is hidden
1332          *
1333          * @param int $cid contact id
1334          *
1335          * @return boolean Is the contact hidden?
1336          * @throws \Exception
1337          */
1338         public static function isHidden($cid)
1339         {
1340                 if ($cid == 0) {
1341                         return false;
1342                 }
1343
1344                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1345                 if (!DBA::isResult($hidden)) {
1346                         return false;
1347                 }
1348                 return (bool) $hidden['hidden'];
1349         }
1350
1351         /**
1352          * Returns posts from a given contact url
1353          *
1354          * @param string $contact_url Contact URL
1355          * @param bool   $thread_mode
1356          * @param int    $update      Update mode
1357          * @param int    $parent      Item parent ID for the update mode
1358          * @param bool   $only_media  Only display media content
1359          * @return string posts in HTML
1360          * @throws \Exception
1361          */
1362         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1363         {
1364                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1365         }
1366
1367         /**
1368          * Returns posts from a given contact id
1369          *
1370          * @param int  $cid         Contact ID
1371          * @param bool $thread_mode
1372          * @param int  $update      Update mode
1373          * @param int  $parent      Item parent ID for the update mode
1374          * @param bool $only_media  Only display media content
1375          * @return string posts in HTML
1376          * @throws \Exception
1377          */
1378         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1379         {
1380                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1381                 if (!DBA::isResult($contact)) {
1382                         return '';
1383                 }
1384
1385                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1386                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1387                 } else {
1388                         $sql = "`uid` = ?";
1389                 }
1390
1391                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1392
1393                 if ($thread_mode) {
1394                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1395                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1396                 } else {
1397                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1398                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1399                 }
1400
1401                 if (!empty($parent)) {
1402                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1403                 } else {
1404                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1405                         if (!empty($last_received)) {
1406                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1407                         }
1408                 }
1409
1410                 if ($only_media) {
1411                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1412                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1413                 }
1414
1415                 if (DI::mode()->isMobile()) {
1416                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1417                                 DI::config()->get('system', 'itemspage_network_mobile'));
1418                 } else {
1419                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1420                                 DI::config()->get('system', 'itemspage_network'));
1421                 }
1422
1423                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1424
1425                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1426
1427                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1428                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1429                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1430                 } else {
1431                         $o = '';
1432                 }
1433
1434                 if ($thread_mode) {
1435                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1436
1437                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'commented', local_user());
1438                 } else {
1439                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1440
1441                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1442                 }
1443
1444                 if (!$update) {
1445                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1446                                 $o .= HTML::scrollLoader();
1447                         } else {
1448                                 $o .= $pager->renderMinimal(count($items));
1449                         }
1450                 }
1451
1452                 return $o;
1453         }
1454
1455         /**
1456          * Returns the account type name
1457          *
1458          * The function can be called with either the user or the contact array
1459          *
1460          * @param array $contact contact or user array
1461          * @return string
1462          */
1463         public static function getAccountType(array $contact)
1464         {
1465                 // There are several fields that indicate that the contact or user is a forum
1466                 // "page-flags" is a field in the user table,
1467                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1468                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1469                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1470                         || (isset($contact['forum']) && intval($contact['forum']))
1471                         || (isset($contact['prv']) && intval($contact['prv']))
1472                         || (isset($contact['community']) && intval($contact['community']))
1473                 ) {
1474                         $type = self::TYPE_COMMUNITY;
1475                 } else {
1476                         $type = self::TYPE_PERSON;
1477                 }
1478
1479                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1480                 if (isset($contact["contact-type"])) {
1481                         $type = $contact["contact-type"];
1482                 }
1483
1484                 if (isset($contact["account-type"])) {
1485                         $type = $contact["account-type"];
1486                 }
1487
1488                 switch ($type) {
1489                         case self::TYPE_ORGANISATION:
1490                                 $account_type = DI::l10n()->t("Organisation");
1491                                 break;
1492
1493                         case self::TYPE_NEWS:
1494                                 $account_type = DI::l10n()->t('News');
1495                                 break;
1496
1497                         case self::TYPE_COMMUNITY:
1498                                 $account_type = DI::l10n()->t("Forum");
1499                                 break;
1500
1501                         default:
1502                                 $account_type = "";
1503                                 break;
1504                 }
1505
1506                 return $account_type;
1507         }
1508
1509         /**
1510          * Blocks a contact
1511          *
1512          * @param int $cid
1513          * @return bool
1514          * @throws \Exception
1515          */
1516         public static function block($cid, $reason = null)
1517         {
1518                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1519
1520                 return $return;
1521         }
1522
1523         /**
1524          * Unblocks a contact
1525          *
1526          * @param int $cid
1527          * @return bool
1528          * @throws \Exception
1529          */
1530         public static function unblock($cid)
1531         {
1532                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1533
1534                 return $return;
1535         }
1536
1537         /**
1538          * Ensure that cached avatar exist
1539          *
1540          * @param integer $cid
1541          */
1542         public static function checkAvatarCache(int $cid)
1543         {
1544                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1545                 if (!DBA::isResult($contact)) {
1546                         return;
1547                 }
1548
1549                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1550                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1551                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1552                                 self::updateAvatar($cid, $contact['avatar'], true);
1553                                 return;
1554                         }
1555                 } elseif (!empty($contact['photo']) || !empty($contact['thumb']) || !empty($contact['micro'])) {
1556                         Logger::info('Removing avatar cache', ['id' => $cid, 'contact' => $contact]);
1557                         self::updateAvatar($cid, $contact['avatar'], true);
1558                         return;
1559                 }
1560         }
1561
1562         /**
1563          * Return the photo path for a given contact array in the given size
1564          *
1565          * @param array $contact    contact array
1566          * @param string $field     Fieldname of the photo in the contact array
1567          * @param string $size      Size of the avatar picture
1568          * @param string $avatar    Avatar path that is displayed when no photo had been found
1569          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1570          * @return string photo path
1571          */
1572         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1573         {
1574                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1575                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1576         }
1577
1578         /**
1579          * Return the photo path for a given contact array
1580          *
1581          * @param array  $contact   Contact array
1582          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1583          * @return string photo path
1584          */
1585         public static function getPhoto(array $contact, bool $no_update = false)
1586         {
1587                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1588         }
1589
1590         /**
1591          * Return the photo path (thumb size) for a given contact array
1592          *
1593          * @param array  $contact   Contact array
1594          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1595          * @return string photo path
1596          */
1597         public static function getThumb(array $contact, bool $no_update = false)
1598         {
1599                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1600         }
1601
1602         /**
1603          * Return the photo path (micro size) for a given contact array
1604          *
1605          * @param array  $contact   Contact array
1606          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1607          * @return string photo path
1608          */
1609         public static function getMicro(array $contact, bool $no_update = false)
1610         {
1611                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1612         }
1613
1614         /**
1615          * Check the given contact array for avatar cache fields
1616          *
1617          * @param array $contact
1618          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1619          * @return array contact array with avatar cache fields
1620          */
1621         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1622         {
1623                 $update = false;
1624                 $contact_fields = [];
1625                 $fields = ['photo', 'thumb', 'micro'];
1626                 foreach ($fields as $field) {
1627                         if (isset($contact[$field])) {
1628                                 $contact_fields[] = $field;
1629                         }
1630                         if (isset($contact[$field]) && empty($contact[$field])) {
1631                                 $update = true;
1632                         }
1633                 }
1634
1635                 if (!$update || $no_update) {
1636                         return $contact;
1637                 }
1638
1639                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1640                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1641
1642                         $new_contact = self::getById($contact['id'], $contact_fields);
1643                         if (DBA::isResult($new_contact)) {
1644                                 // We only update the cache fields
1645                                 $contact = array_merge($contact, $new_contact);
1646                         }
1647                 }
1648
1649                 /// add the default avatars if the fields aren't filled
1650                 if (isset($contact['photo']) && empty($contact['photo'])) {
1651                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1652                 }
1653                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1654                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1655                 }
1656                 if (isset($contact['micro']) && empty($contact['micro'])) {
1657                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1658                 }
1659
1660                 return $contact;
1661         }
1662
1663         /**
1664          * Fetch the default header for the given contact
1665          *
1666          * @param array $contact  contact array
1667          * @return string avatar URL
1668          */
1669         public static function getDefaultHeader(array $contact): string
1670         {
1671                 if (!empty($contact['header'])) {
1672                         return $contact['header'];
1673                 }
1674
1675                 if (!empty($contact['gsid'])) {
1676                         // Use default banners for certain platforms
1677                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1678                         $platform = strtolower($gserver['platform'] ?? '');
1679                 } else {
1680                         $platform = '';
1681                 }
1682
1683                 switch ($platform) {
1684                         case 'friendica':
1685                         case 'friendika':
1686                                 /**
1687                                  * Picture credits
1688                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1689                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1690                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1691                                  */
1692                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1693                                 break;
1694                         case 'diaspora':
1695                                 /**
1696                                  * Picture credits
1697                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1698                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1699                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1700                                  */
1701                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1702                                 break;
1703                         default:
1704                                 /**
1705                                  * Use a random picture.
1706                                  * The service provides random pictures from Unsplash.
1707                                  * @license https://unsplash.com/license
1708                                  */
1709                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1710                                 break;
1711                 }
1712
1713                 return $header;
1714         }
1715
1716         /**
1717          * Fetch the default avatar for the given contact and size
1718          *
1719          * @param array $contact  contact array
1720          * @param string $size    Size of the avatar picture
1721          * @return string avatar URL
1722          */
1723         public static function getDefaultAvatar(array $contact, string $size)
1724         {
1725                 switch ($size) {
1726                         case Proxy::SIZE_MICRO:
1727                                 $avatar['size'] = 48;
1728                                 $default = self::DEFAULT_AVATAR_MICRO;
1729                                 break;
1730
1731                         case Proxy::SIZE_THUMB:
1732                                 $avatar['size'] = 80;
1733                                 $default = self::DEFAULT_AVATAR_THUMB;
1734                                 break;
1735
1736                         case Proxy::SIZE_SMALL:
1737                         default:
1738                                 $avatar['size'] = 300;
1739                                 $default = self::DEFAULT_AVATAR_PHOTO;
1740                                 break;
1741                 }
1742
1743                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1744                         return DI::baseUrl() . $default;
1745                 }
1746
1747                 if (!empty($contact['xmpp'])) {
1748                         $avatar['email'] = $contact['xmpp'];
1749                 } elseif (!empty($contact['addr'])) {
1750                         $avatar['email'] = $contact['addr'];
1751                 } elseif (!empty($contact['url'])) {
1752                         $avatar['email'] = $contact['url'];
1753                 } else {
1754                         return DI::baseUrl() . $default;
1755                 }
1756
1757                 $avatar['url'] = '';
1758                 $avatar['success'] = false;
1759
1760                 Hook::callAll('avatar_lookup', $avatar);
1761
1762                 if ($avatar['success'] && !empty($avatar['url'])) {
1763                         return $avatar['url'];
1764                 }
1765
1766                 return DI::baseUrl() . $default;
1767         }
1768
1769         /**
1770          * Get avatar link for given contact id
1771          *
1772          * @param integer $cid     contact id
1773          * @param string  $size    One of the Proxy::SIZE_* constants
1774          * @param string  $updated Contact update date
1775          * @return string avatar link
1776          */
1777         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1778         {
1779                 // We have to fetch the "updated" variable when it wasn't provided
1780                 // The parameter can be provided to improve performance
1781                 if (empty($updated) || empty($guid)) {
1782                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1783                         $updated = $account['updated'] ?? '';
1784                         $guid = $account['guid'] ?? '';
1785                 }
1786
1787                 $guid = urlencode($guid);
1788
1789                 $url = DI::baseUrl() . '/photo/contact/';
1790                 switch ($size) {
1791                         case Proxy::SIZE_MICRO:
1792                                 $url .= Proxy::PIXEL_MICRO . '/';
1793                                 break;
1794                         case Proxy::SIZE_THUMB:
1795                                 $url .= Proxy::PIXEL_THUMB . '/';
1796                                 break;
1797                         case Proxy::SIZE_SMALL:
1798                                 $url .= Proxy::PIXEL_SMALL . '/';
1799                                 break;
1800                         case Proxy::SIZE_MEDIUM:
1801                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1802                                 break;
1803                         case Proxy::SIZE_LARGE:
1804                                 $url .= Proxy::PIXEL_LARGE . '/';
1805                                 break;
1806                 }
1807                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1808         }
1809
1810         /**
1811          * Get avatar link for given contact URL
1812          *
1813          * @param string  $url  contact url
1814          * @param integer $uid  user id
1815          * @param string  $size One of the Proxy::SIZE_* constants
1816          * @return string avatar link
1817          */
1818         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1819         {
1820                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1821                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1822                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1823                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1824         }
1825
1826         /**
1827          * Get header link for given contact id
1828          *
1829          * @param integer $cid     contact id
1830          * @param string  $size    One of the Proxy::SIZE_* constants
1831          * @param string  $updated Contact update date
1832          * @return string header link
1833          */
1834         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1835         {
1836                 // We have to fetch the "updated" variable when it wasn't provided
1837                 // The parameter can be provided to improve performance
1838                 if (empty($updated) || empty($guid)) {
1839                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1840                         $updated = $account['updated'] ?? '';
1841                         $guid = $account['guid'] ?? '';
1842                 }
1843
1844                 $guid = urlencode($guid);
1845
1846                 $url = DI::baseUrl() . '/photo/header/';
1847                 switch ($size) {
1848                         case Proxy::SIZE_MICRO:
1849                                 $url .= Proxy::PIXEL_MICRO . '/';
1850                                 break;
1851                         case Proxy::SIZE_THUMB:
1852                                 $url .= Proxy::PIXEL_THUMB . '/';
1853                                 break;
1854                         case Proxy::SIZE_SMALL:
1855                                 $url .= Proxy::PIXEL_SMALL . '/';
1856                                 break;
1857                         case Proxy::SIZE_MEDIUM:
1858                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1859                                 break;
1860                         case Proxy::SIZE_LARGE:
1861                                 $url .= Proxy::PIXEL_LARGE . '/';
1862                                 break;
1863                 }
1864
1865                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1866         }
1867
1868         /**
1869          * Updates the avatar links in a contact only if needed
1870          *
1871          * @param int    $cid          Contact id
1872          * @param string $avatar       Link to avatar picture
1873          * @param bool   $force        force picture update
1874          * @param bool   $create_cache Enforces the creation of cached avatar fields
1875          *
1876          * @return void
1877          * @throws HTTPException\InternalServerErrorException
1878          * @throws HTTPException\NotFoundException
1879          * @throws \ImagickException
1880          */
1881         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1882         {
1883                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1884                         ['id' => $cid, 'self' => false]);
1885                 if (!DBA::isResult($contact)) {
1886                         return;
1887                 }
1888
1889                 $uid = $contact['uid'];
1890
1891                 // Only update the cached photo links of public contacts when they already are cached
1892                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1893                         if ($contact['avatar'] != $avatar) {
1894                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1895                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1896                         }
1897                         return;
1898                 }
1899
1900                 // User contacts use are updated through the public contacts
1901                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1902                         $pcid = self::getIdForURL($contact['url'], 0, false);
1903                         if (!empty($pcid)) {
1904                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1905                                 self::updateAvatar($pcid, $avatar, $force, true);
1906                                 return;
1907                         }
1908                 }
1909
1910                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1911
1912                 if ($default_avatar) {
1913                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1914                 }
1915
1916                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
1917
1918                 // Local contact avatars don't need to be cached
1919                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
1920                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
1921                 }
1922
1923                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
1924                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
1925                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1926                                         'photo' => $avatar,
1927                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1928                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1929                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1930                         }
1931
1932                         // Use the data from the self account
1933                         if (empty($fields)) {
1934                                 $local_uid = User::getIdForURL($contact['url']);
1935                                 if (!empty($local_uid)) {
1936                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1937                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1938                                 }
1939                         }
1940
1941                         if (empty($fields)) {
1942                                 $update = ($contact['avatar'] != $avatar) || $force;
1943
1944                                 if (!$update) {
1945                                         $data = [
1946                                                 $contact['photo'] ?? '',
1947                                                 $contact['thumb'] ?? '',
1948                                                 $contact['micro'] ?? '',
1949                                         ];
1950
1951                                         foreach ($data as $image_uri) {
1952                                                 $image_rid = Photo::ridFromURI($image_uri);
1953                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1954                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1955                                                         $update = true;
1956                                                 }
1957                                         }
1958                                 }
1959
1960                                 if ($update) {
1961                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1962                                         if ($photos) {
1963                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1964                                                 $update = !empty($fields);
1965                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1966                                         } else {
1967                                                 $update = false;
1968                                         }
1969                                 }
1970                         } else {
1971                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1972                         }
1973                 } else {
1974                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
1975                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1976                                 'photo' => '', 'thumb' => '', 'micro' => ''];
1977                         $update = ($avatar != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1978                 }
1979
1980                 if (!$update) {
1981                         return;
1982                 }
1983
1984                 $cids = [];
1985                 $uids = [];
1986                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1987                         // Collect all user contacts of the given public contact
1988                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1989                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1990                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1991                                 $cids[] = $personal_contact['id'];
1992                                 $uids[] = $personal_contact['uid'];
1993                         }
1994                         DBA::close($personal_contacts);
1995
1996                         if (!empty($cids)) {
1997                                 // Delete possibly existing cached user contact avatars
1998                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
1999                         }
2000                 }
2001
2002                 $cids[] = $cid;
2003                 $uids[] = $uid;
2004                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2005                 self::update($fields, ['id' => $cids]);
2006         }
2007
2008         public static function deleteContactByUrl(string $url)
2009         {
2010                 // Update contact data for all users
2011                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2012                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2013                 while ($contact = DBA::fetch($contacts)) {
2014                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2015                         self::remove($contact['id']);
2016                 }
2017         }
2018
2019         /**
2020          * Helper function for "updateFromProbe". Updates personal and public contact
2021          *
2022          * @param integer $id      contact id
2023          * @param integer $uid     user id
2024          * @param string  $old_url The previous profile URL of the contact
2025          * @param string  $new_url The profile URL of the contact
2026          * @param array   $fields  The fields that are updated
2027          *
2028          * @throws \Exception
2029          */
2030         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
2031         {
2032                 if (!self::update($fields, ['id' => $id])) {
2033                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2034                         return;
2035                 }
2036
2037                 // Search for duplicated contacts and get rid of them
2038                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
2039                         return;
2040                 }
2041
2042                 // Archive or unarchive the contact.
2043                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2044                 if (!DBA::isResult($contact)) {
2045                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2046                         return;
2047                 }
2048
2049                 if (isset($fields['failed'])) {
2050                         if ($fields['failed']) {
2051                                 self::markForArchival($contact);
2052                         } else {
2053                                 self::unmarkForArchival($contact);
2054                         }
2055                 }
2056
2057                 if ($contact['uid'] != 0) {
2058                         return;
2059                 }
2060
2061                 // Update contact data for all users
2062                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
2063
2064                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2065                 self::update($fields, $condition);
2066
2067                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2068                 $condition['network'] = Protocol::OSTATUS;
2069
2070                 // If the contact failed, propagate the update fields to all contacts
2071                 if (empty($fields['failed'])) {
2072                         unset($fields['last-update']);
2073                         unset($fields['success_update']);
2074                         unset($fields['failure_update']);
2075                 }
2076
2077                 if (empty($fields)) {
2078                         return;
2079                 }
2080
2081                 self::update($fields, $condition);
2082         }
2083
2084         /**
2085          * Remove duplicated contacts
2086          *
2087          * @param string  $nurl  Normalised contact url
2088          * @param integer $uid   User id
2089          * @return boolean
2090          * @throws \Exception
2091          */
2092         public static function removeDuplicates(string $nurl, int $uid)
2093         {
2094                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2095                 $count = DBA::count('contact', $condition);
2096                 if ($count <= 1) {
2097                         return false;
2098                 }
2099
2100                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2101                 if (!DBA::isResult($first_contact)) {
2102                         // Shouldn't happen - so we handle it
2103                         return false;
2104                 }
2105
2106                 $first = $first_contact['id'];
2107                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2108                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2109                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2110                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2111                         return false;
2112                 }
2113
2114                 // Find all duplicates
2115                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2116                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2117                 while ($duplicate = DBA::fetch($duplicates)) {
2118                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2119                                 continue;
2120                         }
2121
2122                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2123                 }
2124                 DBA::close($duplicates);
2125                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2126                 return true;
2127         }
2128
2129         /**
2130          * @param integer $id      contact id
2131          * @param string  $network Optional network we are probing for
2132          * @return boolean
2133          * @throws HTTPException\InternalServerErrorException
2134          * @throws \ImagickException
2135          */
2136         public static function updateFromProbe(int $id, string $network = '')
2137         {
2138                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2139                 if (!DBA::isResult($contact)) {
2140                         return false;
2141                 }
2142
2143                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2144
2145                 if ($ret['network'] == Protocol::DIASPORA) {
2146                         FContact::updateFromProbeArray($ret);
2147                 }
2148
2149                 return self::updateFromProbeArray($id, $ret);
2150         }
2151
2152         /**
2153          * @param integer $id      contact id
2154          * @param array   $ret     Probed data
2155          * @return boolean
2156          * @throws HTTPException\InternalServerErrorException
2157          * @throws \ImagickException
2158          */
2159         private static function updateFromProbeArray(int $id, array $ret)
2160         {
2161                 /*
2162                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2163                   This will reliably kill your communication with old Friendica contacts.
2164                  */
2165
2166                 // These fields aren't updated by this routine:
2167                 // 'sensitive'
2168
2169                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2170                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2171                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2172                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2173                 if (!DBA::isResult($contact)) {
2174                         return false;
2175                 }
2176
2177                 if (self::isLocal($ret['url'])) {
2178                         if ($contact['uid'] == 0) {
2179                                 Logger::info('Local contacts are not updated here.');
2180                         } else {
2181                                 self::updateFromPublicContact($id, $contact);
2182                         }
2183                         return true;
2184                 }
2185
2186                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2187                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2188                         self::remove($id);
2189
2190                         // Delete all contacts with the same URL
2191                         self::deleteContactByUrl($ret['url']);
2192                         return true;
2193                 }
2194
2195                 $uid = $contact['uid'];
2196                 unset($contact['uid']);
2197
2198                 $uriid = $contact['uri-id'];
2199                 unset($contact['uri-id']);
2200
2201                 $pubkey = $contact['pubkey'];
2202                 unset($contact['pubkey']);
2203
2204                 $contact['photo'] = $contact['avatar'];
2205                 unset($contact['avatar']);
2206
2207                 $updated = DateTimeFormat::utcNow();
2208
2209                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2210                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2211                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2212                         return false;
2213                 }
2214
2215                 // We must not try to update relay contacts via probe. They are no real contacts.
2216                 // We check after the probing to be able to correct falsely detected contact types.
2217                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2218                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2219                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2220                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2221                         return true;
2222                 }
2223
2224                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2225                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2226                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2227                         return false;
2228                 }
2229
2230                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2231                         $cid = self::getIdForURL($ret['url'], 0, false);
2232                         if (!empty($cid) && ($cid != $id)) {
2233                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2234                                 return self::updateFromProbeArray($cid, $ret);
2235                         }
2236                 }
2237
2238                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2239                         $ret['unsearchable'] = $ret['hide'];
2240                 }
2241
2242                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2243                         $ret['forum'] = false;
2244                         $ret['prv'] = false;
2245                         $ret['contact-type'] = $ret['account-type'];
2246                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2247                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2248                                 $ret['prv'] = (bool)!$ret['forum'];
2249                         }
2250                 }
2251
2252                 $new_pubkey = $ret['pubkey'] ?? '';
2253
2254                 if ($uid == 0) {
2255                         $ret['last-item'] = Probe::getLastUpdate($ret);
2256                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2257                 }
2258
2259                 $update = false;
2260                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2261
2262                 // make sure to not overwrite existing values with blank entries except some technical fields
2263                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2264                 foreach ($ret as $key => $val) {
2265                         if (!array_key_exists($key, $contact)) {
2266                                 unset($ret[$key]);
2267                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2268                                 $ret[$key] = $contact[$key];
2269                         } elseif ($ret[$key] != $contact[$key]) {
2270                                 $update = true;
2271                         }
2272                 }
2273
2274                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2275                         $update = true;
2276                 } else {
2277                         unset($ret['last-item']);
2278                 }
2279
2280                 if (empty($uriid)) {
2281                         $update = true;
2282                 }
2283
2284                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2285                         self::updateAvatar($id, $ret['photo'], $update);
2286                 }
2287
2288                 $uriid = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2289
2290                 if (!$update) {
2291                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2292
2293                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2294                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2295                         }
2296
2297                         // Update the public contact
2298                         if ($uid != 0) {
2299                                 $contact = self::getByURL($ret['url'], false, ['id']);
2300                                 if (!empty($contact['id'])) {
2301                                         self::updateFromProbeArray($contact['id'], $ret);
2302                                 }
2303                         }
2304
2305                         return true;
2306                 }
2307
2308                 $ret['uri-id']  = $uriid;
2309                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2310                 $ret['updated'] = $updated;
2311                 $ret['failed']  = false;
2312
2313                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2314                 if (empty($pubkey) && !empty($new_pubkey)) {
2315                         $ret['pubkey'] = $new_pubkey;
2316                 }
2317
2318                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2319                         $ret['uri-date'] = $updated;
2320                 }
2321
2322                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2323                         $ret['name-date'] = $updated;
2324                 }
2325
2326                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2327                         $ret['last-update'] = $updated;
2328                         $ret['success_update'] = $updated;
2329                 }
2330
2331                 unset($ret['photo']);
2332
2333                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2334
2335                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2336                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2337                 }
2338
2339                 return true;
2340         }
2341
2342         private static function updateFromPublicContact(int $id, array $contact)
2343         {
2344                 $public = self::getByURL($contact['url'], false);
2345
2346                 $fields = [];
2347
2348                 foreach ($contact as $field => $value) {
2349                         if ($field == 'uid') {
2350                                 continue;
2351                         }
2352                         if ($public[$field] != $value) {
2353                                 $fields[$field] = $public[$field];
2354                         }
2355                 }
2356                 if (!empty($fields)) {
2357                         self::update($fields, ['id' => $id, 'self' => false]);
2358                         Logger::info('Updating local contact', ['id' => $id]);
2359                 }
2360         }
2361
2362         /**
2363          * @param integer $url contact url
2364          * @return integer Contact id
2365          * @throws HTTPException\InternalServerErrorException
2366          * @throws \ImagickException
2367          */
2368         public static function updateFromProbeByURL($url)
2369         {
2370                 $id = self::getIdForURL($url);
2371
2372                 if (empty($id)) {
2373                         return $id;
2374                 }
2375
2376                 self::updateFromProbe($id);
2377
2378                 return $id;
2379         }
2380
2381         /**
2382          * Detects the communication protocol for a given contact url.
2383          * This is used to detect Friendica contacts that we can communicate via AP.
2384          *
2385          * @param string $url contact url
2386          * @param string $network Network of that contact
2387          * @return string with protocol
2388          */
2389         public static function getProtocol($url, $network)
2390         {
2391                 if ($network != Protocol::DFRN) {
2392                         return $network;
2393                 }
2394
2395                 $apcontact = APContact::getByURL($url);
2396                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2397                         return Protocol::ACTIVITYPUB;
2398                 } else {
2399                         return $network;
2400                 }
2401         }
2402
2403         /**
2404          * Takes a $uid and a url/handle and adds a new contact
2405          *
2406          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2407          * dfrn_request page.
2408          *
2409          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2410          *
2411          * Returns an array
2412          * $return['success'] boolean true if successful
2413          * $return['message'] error text if success is false.
2414          *
2415          * Takes a $uid and a url/handle and adds a new contact
2416          *
2417          * @param int    $uid         The user id the contact should be created for
2418          * @param string $url         The profile URL of the contact
2419          * @param string $network
2420          * @return array
2421          * @throws HTTPException\InternalServerErrorException
2422          * @throws HTTPException\NotFoundException
2423          * @throws \ImagickException
2424          */
2425         public static function createFromProbeForUser(int $uid, $url, $network = '')
2426         {
2427                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2428
2429                 // remove ajax junk, e.g. Twitter
2430                 $url = str_replace('/#!/', '/', $url);
2431
2432                 if (!Network::isUrlAllowed($url)) {
2433                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2434                         return $result;
2435                 }
2436
2437                 if (Network::isUrlBlocked($url)) {
2438                         $result['message'] = DI::l10n()->t('Blocked domain');
2439                         return $result;
2440                 }
2441
2442                 if (!$url) {
2443                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2444                         return $result;
2445                 }
2446
2447                 $arr = ['url' => $url, 'contact' => []];
2448
2449                 Hook::callAll('follow', $arr);
2450
2451                 if (empty($arr)) {
2452                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2453                         return $result;
2454                 }
2455
2456                 if (!empty($arr['contact']['name'])) {
2457                         $probed = false;
2458                         $ret = $arr['contact'];
2459                 } else {
2460                         $probed = true;
2461                         $ret = Probe::uri($url, $network, $uid);
2462                 }
2463
2464                 if (($network != '') && ($ret['network'] != $network)) {
2465                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2466                         return $result;
2467                 }
2468
2469                 // check if we already have a contact
2470                 // the poll url is more reliable than the profile url, as we may have
2471                 // indirect links or webfinger links
2472
2473                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2474                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2475                 if (!DBA::isResult($contact)) {
2476                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2477                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2478                 }
2479
2480                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2481
2482                 // This extra param just confuses things, remove it
2483                 if ($protocol === Protocol::DIASPORA) {
2484                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2485                 }
2486
2487                 // do we have enough information?
2488                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2489                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2490                         if (empty($ret['poll'])) {
2491                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2492                         }
2493                         if (empty($ret['name'])) {
2494                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2495                         }
2496                         if (empty($ret['url'])) {
2497                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2498                         }
2499                         if (strpos($ret['url'], '@') !== false) {
2500                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2501                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2502                         }
2503                         return $result;
2504                 }
2505
2506                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2507                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2508                         $ret['notify'] = '';
2509                 }
2510
2511                 if (!$ret['notify']) {
2512                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2513                 }
2514
2515                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2516
2517                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2518
2519                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2520
2521                 $pending = false;
2522                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2523                         $pending = (bool)$ret['manually-approve'];
2524                 }
2525
2526                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2527                         $writeable = 1;
2528                 }
2529
2530                 if (DBA::isResult($contact)) {
2531                         // update contact
2532                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2533
2534                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2535                         self::update($fields, ['id' => $contact['id']]);
2536                 } else {
2537                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2538
2539                         // create contact record
2540                         self::insert([
2541                                 'uid'     => $uid,
2542                                 'created' => DateTimeFormat::utcNow(),
2543                                 'url'     => $ret['url'],
2544                                 'nurl'    => Strings::normaliseLink($ret['url']),
2545                                 'addr'    => $ret['addr'],
2546                                 'alias'   => $ret['alias'],
2547                                 'batch'   => $ret['batch'],
2548                                 'notify'  => $ret['notify'],
2549                                 'poll'    => $ret['poll'],
2550                                 'poco'    => $ret['poco'],
2551                                 'name'    => $ret['name'],
2552                                 'nick'    => $ret['nick'],
2553                                 'network' => $ret['network'],
2554                                 'baseurl' => $ret['baseurl'],
2555                                 'gsid'    => $ret['gsid'] ?? null,
2556                                 'protocol' => $protocol,
2557                                 'pubkey'  => $ret['pubkey'],
2558                                 'rel'     => $new_relation,
2559                                 'priority'=> $ret['priority'],
2560                                 'writable'=> $writeable,
2561                                 'hidden'  => $hidden,
2562                                 'blocked' => 0,
2563                                 'readonly'=> 0,
2564                                 'pending' => $pending,
2565                                 'subhub'  => $subhub
2566                         ]);
2567                 }
2568
2569                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2570                 if (!DBA::isResult($contact)) {
2571                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2572                         return $result;
2573                 }
2574
2575                 $contact_id = $contact['id'];
2576                 $result['cid'] = $contact_id;
2577
2578                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
2579
2580                 // Update the avatar
2581                 self::updateAvatar($contact_id, $ret['photo']);
2582
2583                 // pull feed and consume it, which should subscribe to the hub.
2584                 if ($contact['network'] == Protocol::OSTATUS) {
2585                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2586                 }
2587
2588                 if ($probed) {
2589                         self::updateFromProbeArray($contact_id, $ret);
2590                 } else {
2591                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2592                 }
2593
2594                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
2595
2596                 return $result;
2597         }
2598
2599         /**
2600          * Unfollow a contact
2601          *
2602          * @param int $cid Public contact id
2603          * @param int $uid  User ID
2604          *
2605          * @return bool "true" if unfollowing had been successful
2606          */
2607         public static function unfollow(int $cid, int $uid)
2608         {
2609                 $cdata = self::getPublicAndUserContactID($cid, $uid);
2610                 if (empty($cdata['user'])) {
2611                         return false;
2612                 }
2613
2614                 $contact = self::getById($cdata['user']);
2615
2616                 self::removeSharer([], $contact);
2617
2618                 return true;
2619         }
2620
2621         /**
2622          * @param array  $importer Owner (local user) data
2623          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2624          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2625          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2626          * @param string $note     Introduction additional message
2627          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2628          * @throws HTTPException\InternalServerErrorException
2629          * @throws \ImagickException
2630          */
2631         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2632         {
2633                 // Should always be set
2634                 if (empty($datarray['author-id'])) {
2635                         return false;
2636                 }
2637
2638                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2639                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2640                 if (!DBA::isResult($pub_contact)) {
2641                         // Should never happen
2642                         return false;
2643                 }
2644
2645                 // Contact is blocked at node-level
2646                 if (self::isBlocked($datarray['author-id'])) {
2647                         return false;
2648                 }
2649
2650                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2651                 $name = $pub_contact['name'];
2652                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2653                 $nick = $pub_contact['nick'];
2654                 $network = $pub_contact['network'];
2655
2656                 // Ensure that we don't create a new contact when there already is one
2657                 $cid = self::getIdForURL($url, $importer['uid']);
2658                 if (!empty($cid)) {
2659                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2660                 }
2661
2662                 if (!empty($contact)) {
2663                         if (!empty($contact['pending'])) {
2664                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2665                                 return null;
2666                         }
2667
2668                         // Contact is blocked at user-level
2669                         if (!empty($contact['id']) && !empty($importer['id']) &&
2670                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2671                                 return false;
2672                         }
2673
2674                         // Make sure that the existing contact isn't archived
2675                         self::unmarkForArchival($contact);
2676
2677                         if (($contact['rel'] == self::SHARING)
2678                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2679                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2680                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2681                         }
2682
2683                         // Ensure to always have the correct network type, independent from the connection request method
2684                         self::updateFromProbe($contact['id']);
2685
2686                         Post\UserNotification::insertNotification($contact['id'], Activity::FOLLOW, $importer['uid']);
2687
2688                         return true;
2689                 } else {
2690                         // send email notification to owner?
2691                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2692                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
2693                                 return null;
2694                         }
2695
2696                         // create contact record
2697                         $contact_id = self::insert([
2698                                 'uid'      => $importer['uid'],
2699                                 'created'  => DateTimeFormat::utcNow(),
2700                                 'url'      => $url,
2701                                 'nurl'     => Strings::normaliseLink($url),
2702                                 'name'     => $name,
2703                                 'nick'     => $nick,
2704                                 'network'  => $network,
2705                                 'rel'      => self::FOLLOWER,
2706                                 'blocked'  => 0,
2707                                 'readonly' => 0,
2708                                 'pending'  => 1,
2709                                 'writable' => 1,
2710                         ]);
2711
2712                         // Ensure to always have the correct network type, independent from the connection request method
2713                         self::updateFromProbe($contact_id);
2714
2715                         self::updateAvatar($contact_id, $photo, true);
2716
2717                         Post\UserNotification::insertNotification($contact_id, Activity::FOLLOW, $importer['uid']);
2718
2719                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2720
2721                         /// @TODO Encapsulate this into a function/method
2722                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2723                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2724                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2725                                 // create notification
2726                                 if (is_array($contact_record)) {
2727                                         $intro = DI::introFactory()->createNew(
2728                                                 $importer['uid'],
2729                                                 $contact_record['id'],
2730                                                 $note
2731                                         );
2732                                         DI::intro()->save($intro);
2733                                 }
2734
2735                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
2736
2737                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2738                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2739
2740                                         DI::notify()->createFromArray([
2741                                                 'type'  => Notification\Type::INTRO,
2742                                                 'otype' => Notification\ObjectType::INTRO,
2743                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2744                                                 'uid'   => $user['uid'],
2745                                                 'cid'   => $contact_record['id'],
2746                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2747                                         ]);
2748                                 }
2749                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2750                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2751                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2752                                 }
2753
2754                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2755                                 $fields = ['pending' => false];
2756                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2757                                         $fields['rel'] = self::FRIEND;
2758                                 }
2759
2760                                 self::update($fields, $condition);
2761
2762                                 return true;
2763                         }
2764                 }
2765
2766                 return null;
2767         }
2768
2769         public static function removeFollower(array $contact)
2770         {
2771                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2772                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2773                 } elseif (!empty($contact['id'])) {
2774                         self::remove($contact['id']);
2775                 } else {
2776                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2777                 }
2778         }
2779
2780         public static function removeSharer($importer, $contact)
2781         {
2782                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2783                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2784                 } else {
2785                         self::remove($contact['id']);
2786                 }
2787         }
2788
2789         /**
2790          * Create a birthday event.
2791          *
2792          * Update the year and the birthday.
2793          */
2794         public static function updateBirthdays()
2795         {
2796                 $condition = [
2797                         '`bd` > ?
2798                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2799                         AND NOT `contact`.`pending`
2800                         AND NOT `contact`.`hidden`
2801                         AND NOT `contact`.`blocked`
2802                         AND NOT `contact`.`archive`
2803                         AND NOT `contact`.`deleted`',
2804                         DBA::NULL_DATE,
2805                         self::SHARING,
2806                         self::FRIEND
2807                 ];
2808
2809                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2810
2811                 while ($contact = DBA::fetch($contacts)) {
2812                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
2813
2814                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2815
2816                         if (Event::createBirthday($contact, $nextbd)) {
2817                                 // update bdyear
2818                                 DBA::update(
2819                                         'contact',
2820                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2821                                         ['id' => $contact['id']]
2822                                 );
2823                         }
2824                 }
2825                 DBA::close($contacts);
2826         }
2827
2828         /**
2829          * Remove the unavailable contact ids from the provided list
2830          *
2831          * @param array $contact_ids Contact id list
2832          * @return array
2833          * @throws \Exception
2834          */
2835         public static function pruneUnavailable(array $contact_ids)
2836         {
2837                 if (empty($contact_ids)) {
2838                         return [];
2839                 }
2840
2841                 $contacts = self::selectToArray(['id'], [
2842                         'id'      => $contact_ids,
2843                         'blocked' => false,
2844                         'pending' => false,
2845                         'archive' => false,
2846                 ]);
2847
2848                 return array_column($contacts, 'id');
2849         }
2850
2851         /**
2852          * Returns a magic link to authenticate remote visitors
2853          *
2854          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2855          *
2856          * @param string $contact_url The address of the target contact profile
2857          * @param string $url         An url that we will be redirected to after the authentication
2858          *
2859          * @return string with "redir" link
2860          * @throws HTTPException\InternalServerErrorException
2861          * @throws \ImagickException
2862          */
2863         public static function magicLink($contact_url, $url = '')
2864         {
2865                 if (!Session::isAuthenticated()) {
2866                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2867                 }
2868
2869                 $contact = self::getByURL($contact_url, false);
2870                 if (empty($contact)) {
2871                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2872                 }
2873
2874                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2875                 unset($contact['uid']);
2876
2877                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2878         }
2879
2880         /**
2881          * Returns a magic link to authenticate remote visitors
2882          *
2883          * @param integer $cid The contact id of the target contact profile
2884          * @param string  $url An url that we will be redirected to after the authentication
2885          *
2886          * @return string with "redir" link
2887          * @throws HTTPException\InternalServerErrorException
2888          * @throws \ImagickException
2889          */
2890         public static function magicLinkById($cid, $url = '')
2891         {
2892                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2893
2894                 return self::magicLinkByContact($contact, $url);
2895         }
2896
2897         /**
2898          * Returns a magic link to authenticate remote visitors
2899          *
2900          * @param array  $contact The contact array with "uid", "network" and "url"
2901          * @param string $url     An url that we will be redirected to after the authentication
2902          *
2903          * @return string with "redir" link
2904          * @throws HTTPException\InternalServerErrorException
2905          * @throws \ImagickException
2906          */
2907         public static function magicLinkByContact($contact, $url = '')
2908         {
2909                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2910
2911                 if (!Session::isAuthenticated()) {
2912                         return $destination;
2913                 }
2914
2915                 // Only redirections to the same host do make sense
2916                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2917                         return $url;
2918                 }
2919
2920                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2921                         return 'contact/' . $contact['id'] . '/conversations';
2922                 }
2923
2924                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2925                         return $destination;
2926                 }
2927
2928                 if (empty($contact['id'])) {
2929                         return $destination;
2930                 }
2931
2932                 $redirect = 'redir/' . $contact['id'];
2933
2934                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2935                         $redirect .= '?url=' . $url;
2936                 }
2937
2938                 return $redirect;
2939         }
2940
2941         /**
2942          * Is the contact a forum?
2943          *
2944          * @param integer $contactid ID of the contact
2945          *
2946          * @return boolean "true" if it is a forum
2947          */
2948         public static function isForum($contactid)
2949         {
2950                 $fields = ['forum', 'prv'];
2951                 $condition = ['id' => $contactid];
2952                 $contact = DBA::selectFirst('contact', $fields, $condition);
2953                 if (!DBA::isResult($contact)) {
2954                         return false;
2955                 }
2956
2957                 // Is it a forum?
2958                 return ($contact['forum'] || $contact['prv']);
2959         }
2960
2961         /**
2962          * Can the remote contact receive private messages?
2963          *
2964          * @param array $contact
2965          * @return bool
2966          */
2967         public static function canReceivePrivateMessages(array $contact)
2968         {
2969                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2970                 $self = $contact['self'] ?? false;
2971
2972                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2973         }
2974
2975         /**
2976          * Search contact table by nick or name
2977          *
2978          * @param string $search Name or nick
2979          * @param string $mode   Search mode (e.g. "community")
2980          * @param int    $uid    User ID
2981          *
2982          * @return array with search results
2983          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2984          */
2985         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2986         {
2987                 if (empty($search)) {
2988                         return [];
2989                 }
2990
2991                 // check supported networks
2992                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
2993                 if (DI::config()->get('system', 'diaspora_enabled')) {
2994                         $networks[] = Protocol::DIASPORA;
2995                 }
2996
2997                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2998                         $networks[] = Protocol::OSTATUS;
2999                 }
3000
3001                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
3002
3003                 if ($uid == 0) {
3004                         $condition['blocked'] = false;
3005                 }
3006
3007                 // check if we search only communities or every contact
3008                 if ($mode === 'community') {
3009                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3010                 }
3011
3012                 $search .= '%';
3013
3014                 $condition = DBA::mergeConditions($condition,
3015                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3016                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3017
3018                 $contacts = self::selectToArray([], $condition);
3019                 return $contacts;
3020         }
3021
3022         /**
3023          * Add public contacts from an array
3024          *
3025          * @param array $urls
3026          * @return array result "count", "added" and "updated"
3027          */
3028         public static function addByUrls(array $urls)
3029         {
3030                 $added = 0;
3031                 $updated = 0;
3032                 $unchanged = 0;
3033                 $count = 0;
3034
3035                 foreach ($urls as $url) {
3036                         if (empty($url) || !is_string($url)) {
3037                                 continue;
3038                         }
3039                         $contact = self::getByURL($url, false, ['id', 'updated']);
3040                         if (empty($contact['id'])) {
3041                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3042                                 ++$added;
3043                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3044                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3045                                 ++$updated;
3046                         } else {
3047                                 ++$unchanged;
3048                         }
3049                         ++$count;
3050                 }
3051
3052                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3053         }
3054
3055         /**
3056          * Returns a random, global contact array of the current node
3057          *
3058          * @return array The profile array
3059          * @throws Exception
3060          */
3061         public static function getRandomContact()
3062         {
3063                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3064                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3065                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3066                 ], ['order' => ['RAND()']]);
3067
3068                 if (DBA::isResult($contact)) {
3069                         return $contact;
3070                 }
3071
3072                 return [];
3073         }
3074 }