src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, 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\Content\Pager;
  26 use Friendica\Content\Text\HTML;
  27 use Friendica\Core\Hook;
  28 use Friendica\Core\Logger;
  29 use Friendica\Core\Protocol;
  30 use Friendica\Core\Renderer;
  31 use Friendica\Core\Session;
  32 use Friendica\Core\System;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\Database;
  35 use Friendica\Database\DBA;
  36 use Friendica\DI;
  37 use Friendica\Network\HTTPException;
  38 use Friendica\Network\Probe;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\Diaspora;
  42 use Friendica\Protocol\OStatus;
  43 use Friendica\Protocol\Salmon;
  44 use Friendica\Util\DateTimeFormat;
  45 use Friendica\Util\Images;
  46 use Friendica\Util\Network;
  47 use Friendica\Util\Proxy;
  48 use Friendica\Util\Strings;
  49
  50 /**
  51  * functions for interacting with a contact
  52  */
  53 class Contact
  54 {
  55         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  56         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  57         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  58
  59         /**
  60          * @deprecated since version 2019.03
  61          * @see User::PAGE_FLAGS_NORMAL
  62          */
  63         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  64         /**
  65          * @deprecated since version 2019.03
  66          * @see User::PAGE_FLAGS_SOAPBOX
  67          */
  68         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  69         /**
  70          * @deprecated since version 2019.03
  71          * @see User::PAGE_FLAGS_COMMUNITY
  72          */
  73         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  74         /**
  75          * @deprecated since version 2019.03
  76          * @see User::PAGE_FLAGS_FREELOVE
  77          */
  78         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  79         /**
  80          * @deprecated since version 2019.03
  81          * @see User::PAGE_FLAGS_BLOG
  82          */
  83         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  84         /**
  85          * @deprecated since version 2019.03
  86          * @see User::PAGE_FLAGS_PRVGROUP
  87          */
  88         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  89         /**
  90          * @}
  91          */
  92
  93         const LOCK_INSERT = 'contact-insert';
  94
  95         /**
  96          * Account types
  97          *
  98          * TYPE_UNKNOWN - unknown type
  99          *
 100          * TYPE_PERSON - the account belongs to a person
 101          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
 102          *
 103          * TYPE_ORGANISATION - the account belongs to an organisation
 104          *      Associated page type: PAGE_SOAPBOX
 105          *
 106          * TYPE_NEWS - the account is a news reflector
 107          *      Associated page type: PAGE_SOAPBOX
 108          *
 109          * TYPE_COMMUNITY - the account is community forum
 110          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 111          *
 112          * TYPE_RELAY - the account is a relay
 113          *      This will only be assigned to contacts, not to user accounts
 114          * @{
 115          */
 116         const TYPE_UNKNOWN =     -1;
 117         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 118         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 119         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 120         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 121         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 122         /**
 123          * @}
 124          */
 125
 126         /**
 127          * Contact_is
 128          *
 129          * Relationship types
 130          * @{
 131          */
 132         const NOTHING  = 0;
 133         const FOLLOWER = 1;
 134         const SHARING  = 2;
 135         const FRIEND   = 3;
 136         const SELF     = 4;
 137         /**
 138          * @}
 139          */
 140
 141          const MIRROR_DEACTIVATED = 0;
 142          const MIRROR_FORWARDED = 1;
 143          const MIRROR_OWN_POST = 2;
 144          const MIRROR_NATIVE_RESHARE = 3;
 145
 146          /**
 147          * @param array $fields    Array of selected fields, empty for all
 148          * @param array $condition Array of fields for condition
 149          * @param array $params    Array of several parameters
 150          * @return array
 151          * @throws \Exception
 152          */
 153         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 154         {
 155                 return DBA::selectToArray('contact', $fields, $condition, $params);
 156         }
 157
 158         /**
 159          * @param array $fields    Array of selected fields, empty for all
 160          * @param array $condition Array of fields for condition
 161          * @param array $params    Array of several parameters
 162          * @return array
 163          * @throws \Exception
 164          */
 165         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 166         {
 167                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 168
 169                 return $contact;
 170         }
 171
 172         /**
 173          * Insert a row into the contact table
 174          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 175          *
 176          * @param array $fields         field array
 177          * @param int   $duplicate_mode Do an update on a duplicate entry
 178          *
 179          * @return int  id of the created contact
 180          * @throws \Exception
 181          */
 182         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 183         {
 184                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 185                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 186                 }
 187
 188                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 189
 190                 if (empty($fields['created'])) {
 191                         $fields['created'] = DateTimeFormat::utcNow();
 192                 }
 193
 194                 DBA::insert('contact', $fields, $duplicate_mode);
 195                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 196                 if (!DBA::isResult($contact)) {
 197                         // Shouldn't happen
 198                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 199                         return 0;
 200                 }
 201
 202                 Contact\User::insertForContactArray($contact);
 203
 204                 // Search for duplicated contacts and get rid of them
 205                 if (!$contact['self']) {
 206                         self::removeDuplicates($contact['nurl'], $contact['uid']);
 207                 }
 208
 209                 return $contact['id'];
 210         }
 211
 212         /**
 213          * Updates rows in the contact table
 214          *
 215          * @param array         $fields     contains the fields that are updated
 216          * @param array         $condition  condition array with the key values
 217          * @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)
 218          *
 219          * @return boolean was the update successfull?
 220          * @throws \Exception
 221          */
 222         public static function update(array $fields, array $condition, $old_fields = [])
 223         {
 224                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 225
 226                 // Apply changes to the "user-contact" table on dedicated fields
 227                 Contact\User::updateByContactUpdate($fields, $condition);
 228
 229                 return $ret;
 230         }
 231
 232         /**
 233          * @param integer $id     Contact ID
 234          * @param array   $fields Array of selected fields, empty for all
 235          * @return array|boolean Contact record if it exists, false otherwise
 236          * @throws \Exception
 237          */
 238         public static function getById($id, $fields = [])
 239         {
 240                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 241         }
 242
 243         /**
 244          * Fetches a contact by a given url
 245          *
 246          * @param string  $url    profile url
 247          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 248          * @param array   $fields Field list
 249          * @param integer $uid    User ID of the contact
 250          * @return array contact array
 251          */
 252         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 253         {
 254                 if ($update || is_null($update)) {
 255                         $cid = self::getIdForURL($url, $uid, $update);
 256                         if (empty($cid)) {
 257                                 return [];
 258                         }
 259
 260                         $contact = self::getById($cid, $fields);
 261                         if (empty($contact)) {
 262                                 return [];
 263                         }
 264                         return $contact;
 265                 }
 266
 267                 // Add internal fields
 268                 $removal = [];
 269                 if (!empty($fields)) {
 270                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 271                                 if (!in_array($internal, $fields)) {
 272                                         $fields[] = $internal;
 273                                         $removal[] = $internal;
 274                                 }
 275                         }
 276                 }
 277
 278                 // We first try the nurl (http://server.tld/nick), most common case
 279                 $options = ['order' => ['id']];
 280                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 281
 282                 // Then the addr (nick@server.tld)
 283                 if (!DBA::isResult($contact)) {
 284                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 285                 }
 286
 287                 // Then the alias (which could be anything)
 288                 if (!DBA::isResult($contact)) {
 289                         // The link could be provided as http although we stored it as https
 290                         $ssl_url = str_replace('http://', 'https://', $url);
 291                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 292                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 293                 }
 294
 295                 if (!DBA::isResult($contact)) {
 296                         return [];
 297                 }
 298
 299                 // Update the contact in the background if needed
 300                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 301                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 302                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 303                 }
 304
 305                 // Remove the internal fields
 306                 foreach ($removal as $internal) {
 307                         unset($contact[$internal]);
 308                 }
 309
 310                 return $contact;
 311         }
 312
 313         /**
 314          * Fetches a contact for a given user by a given url.
 315          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 316          *
 317          * @param string  $url    profile url
 318          * @param integer $uid    User ID of the contact
 319          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 320          * @param array   $fields Field list
 321          * @return array contact array
 322          */
 323         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 324         {
 325                 if ($uid != 0) {
 326                         $contact = self::getByURL($url, $update, $fields, $uid);
 327                         if (!empty($contact)) {
 328                                 if (!empty($contact['id'])) {
 329                                         $contact['cid'] = $contact['id'];
 330                                         $contact['zid'] = 0;
 331                                 }
 332                                 return $contact;
 333                         }
 334                 }
 335
 336                 $contact = self::getByURL($url, $update, $fields);
 337                 if (!empty($contact['id'])) {
 338                         $contact['cid'] = 0;
 339                         $contact['zid'] = $contact['id'];
 340                 }
 341                 return $contact;
 342         }
 343
 344         /**
 345          * Tests if the given contact is a follower
 346          *
 347          * @param int $cid Either public contact id or user's contact id
 348          * @param int $uid User ID
 349          *
 350          * @return boolean is the contact id a follower?
 351          * @throws HTTPException\InternalServerErrorException
 352          * @throws \ImagickException
 353          */
 354         public static function isFollower($cid, $uid)
 355         {
 356                 if (Contact\User::isBlocked($cid, $uid)) {
 357                         return false;
 358                 }
 359
 360                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 361                 if (empty($cdata['user'])) {
 362                         return false;
 363                 }
 364
 365                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 366                 return DBA::exists('contact', $condition);
 367         }
 368
 369         /**
 370          * Tests if the given contact url is a follower
 371          *
 372          * @param string $url Contact URL
 373          * @param int    $uid User ID
 374          *
 375          * @return boolean is the contact id a follower?
 376          * @throws HTTPException\InternalServerErrorException
 377          * @throws \ImagickException
 378          */
 379         public static function isFollowerByURL($url, $uid)
 380         {
 381                 $cid = self::getIdForURL($url, $uid);
 382
 383                 if (empty($cid)) {
 384                         return false;
 385                 }
 386
 387                 return self::isFollower($cid, $uid);
 388         }
 389
 390         /**
 391          * Tests if the given user follow the given contact
 392          *
 393          * @param int $cid Either public contact id or user's contact id
 394          * @param int $uid User ID
 395          *
 396          * @return boolean is the contact url being followed?
 397          * @throws HTTPException\InternalServerErrorException
 398          * @throws \ImagickException
 399          */
 400         public static function isSharing($cid, $uid)
 401         {
 402                 if (Contact\User::isBlocked($cid, $uid)) {
 403                         return false;
 404                 }
 405
 406                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 407                 if (empty($cdata['user'])) {
 408                         return false;
 409                 }
 410
 411                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 412                 return DBA::exists('contact', $condition);
 413         }
 414
 415         /**
 416          * Tests if the given user follow the given contact url
 417          *
 418          * @param string $url Contact URL
 419          * @param int    $uid User ID
 420          *
 421          * @return boolean is the contact url being followed?
 422          * @throws HTTPException\InternalServerErrorException
 423          * @throws \ImagickException
 424          */
 425         public static function isSharingByURL($url, $uid)
 426         {
 427                 $cid = self::getIdForURL($url, $uid);
 428
 429                 if (empty($cid)) {
 430                         return false;
 431                 }
 432
 433                 return self::isSharing($cid, $uid);
 434         }
 435
 436         /**
 437          * Get the basepath for a given contact link
 438          *
 439          * @param string $url The contact link
 440          * @param boolean $dont_update Don't update the contact
 441          *
 442          * @return string basepath
 443          * @throws HTTPException\InternalServerErrorException
 444          * @throws \ImagickException
 445          */
 446         public static function getBasepath($url, $dont_update = false)
 447         {
 448                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 449                 if (!DBA::isResult($contact)) {
 450                         return '';
 451                 }
 452
 453                 if (!empty($contact['baseurl'])) {
 454                         return $contact['baseurl'];
 455                 } elseif ($dont_update) {
 456                         return '';
 457                 }
 458
 459                 // Update the existing contact
 460                 self::updateFromProbe($contact['id']);
 461
 462                 // And fetch the result
 463                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 464                 if (empty($contact['baseurl'])) {
 465                         Logger::info('No baseurl for contact', ['url' => $url]);
 466                         return '';
 467                 }
 468
 469                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 470                 return $contact['baseurl'];
 471         }
 472
 473         /**
 474          * Check if the given contact url is on the same server
 475          *
 476          * @param string $url The contact link
 477          *
 478          * @return boolean Is it the same server?
 479          */
 480         public static function isLocal($url)
 481         {
 482                 if (!parse_url($url, PHP_URL_SCHEME)) {
 483                         $addr_parts = explode('@', $url);
 484                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 485                 }
 486
 487                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 488         }
 489
 490         /**
 491          * Check if the given contact ID is on the same server
 492          *
 493          * @param string $url The contact link
 494          *
 495          * @return boolean Is it the same server?
 496          */
 497         public static function isLocalById(int $cid)
 498         {
 499                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 500                 if (!DBA::isResult($contact)) {
 501                         return false;
 502                 }
 503
 504                 if (empty($contact['baseurl'])) {
 505                         $baseurl = self::getBasepath($contact['url'], true);
 506                 } else {
 507                         $baseurl = $contact['baseurl'];
 508                 }
 509
 510                 return Strings::compareLink($baseurl, DI::baseUrl());
 511         }
 512
 513         /**
 514          * Returns the public contact id of the given user id
 515          *
 516          * @param  integer $uid User ID
 517          *
 518          * @return integer|boolean Public contact id for given user id
 519          * @throws \Exception
 520          */
 521         public static function getPublicIdByUserId($uid)
 522         {
 523                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 524                 if (!DBA::isResult($self)) {
 525                         return false;
 526                 }
 527                 return self::getIdForURL($self['url']);
 528         }
 529
 530         /**
 531          * Returns the contact id for the user and the public contact id for a given contact id
 532          *
 533          * @param int $cid Either public contact id or user's contact id
 534          * @param int $uid User ID
 535          *
 536          * @return array with public and user's contact id
 537          * @throws HTTPException\InternalServerErrorException
 538          * @throws \ImagickException
 539          */
 540         public static function getPublicAndUserContactID($cid, $uid)
 541         {
 542                 // We have to use the legacy function as long as the post update hasn't finished
 543                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 544                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 545                 }
 546
 547                 if (empty($uid) || empty($cid)) {
 548                         return [];
 549                 }
 550
 551                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 552                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 553                         return [];
 554                 }
 555
 556                 $pcid = $contact['pid'];
 557                 if ($contact['uid'] == $uid) {
 558                         $ucid = $contact['id'];
 559                 } else {
 560                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 561                         if (DBA::isResult($contact)) {
 562                                 $ucid = $contact['id'];
 563                         } else {
 564                                 $ucid = 0;
 565                         }
 566                 }
 567
 568                 return ['public' => $pcid, 'user' => $ucid];
 569         }
 570
 571         /**
 572          * Helper function for "getPublicAndUserContactID"
 573          *
 574          * @param int $cid Either public contact id or user's contact id
 575          * @param int $uid User ID
 576          *
 577          * @return array with public and user's contact id
 578          * @throws HTTPException\InternalServerErrorException
 579          * @throws \ImagickException
 580          */
 581         private static function legacyGetPublicAndUserContactID($cid, $uid)
 582         {
 583                 if (empty($uid) || empty($cid)) {
 584                         return [];
 585                 }
 586
 587                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 588                 if (!DBA::isResult($contact)) {
 589                         return [];
 590                 }
 591
 592                 // We quit when the user id don't match the user id of the provided contact
 593                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 594                         return [];
 595                 }
 596
 597                 if ($contact['uid'] != 0) {
 598                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 599                         if (empty($pcid)) {
 600                                 return [];
 601                         }
 602                         $ucid = $contact['id'];
 603                 } else {
 604                         $pcid = $contact['id'];
 605                         $ucid = self::getIdForURL($contact['url'], $uid);
 606                 }
 607
 608                 return ['public' => $pcid, 'user' => $ucid];
 609         }
 610
 611         /**
 612          * Returns contact details for a given contact id in combination with a user id
 613          *
 614          * @param int $cid A contact ID
 615          * @param int $uid The User ID
 616          * @param array $fields The selected fields for the contact
 617          *
 618          * @return array The contact details
 619          *
 620          * @throws \Exception
 621          */
 622         public static function getContactForUser($cid, $uid, array $fields = [])
 623         {
 624                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 625
 626                 if (!DBA::isResult($contact)) {
 627                         return [];
 628                 } else {
 629                         return $contact;
 630                 }
 631         }
 632
 633         /**
 634          * Creates the self-contact for the provided user id
 635          *
 636          * @param int $uid
 637          * @return bool Operation success
 638          * @throws HTTPException\InternalServerErrorException
 639          */
 640         public static function createSelfFromUserId($uid)
 641         {
 642                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 643                         ['uid' => $uid, 'account_expired' => false]);
 644                 if (!DBA::isResult($user)) {
 645                         return false;
 646                 }
 647
 648                 $contact = [
 649                         'uid'         => $user['uid'],
 650                         'created'     => DateTimeFormat::utcNow(),
 651                         'self'        => 1,
 652                         'name'        => $user['username'],
 653                         'nick'        => $user['nickname'],
 654                         'pubkey'      => $user['pubkey'],
 655                         'prvkey'      => $user['prvkey'],
 656                         'photo'       => User::getAvatarUrlForId($user['uid']),
 657                         'thumb'       => User::getAvatarUrlForId($user['uid'], Proxy::SIZE_THUMB),
 658                         'micro'       => User::getAvatarUrlForId($user['uid'], Proxy::SIZE_MICRO),
 659                         'blocked'     => 0,
 660                         'pending'     => 0,
 661                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 662                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 663                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 664                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 665                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 666                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 667                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 668                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 669                         'name-date'   => DateTimeFormat::utcNow(),
 670                         'uri-date'    => DateTimeFormat::utcNow(),
 671                         'avatar-date' => DateTimeFormat::utcNow(),
 672                         'closeness'   => 0
 673                 ];
 674
 675                 $return = true;
 676
 677                 // Only create the entry if it doesn't exist yet
 678                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 679                         $return = (bool)self::insert($contact);
 680                 }
 681
 682                 // Create the public contact
 683                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 684                         $contact['self']   = false;
 685                         $contact['uid']    = 0;
 686                         $contact['prvkey'] = null;
 687
 688                         self::insert($contact, Database::INSERT_IGNORE);
 689                 }
 690
 691                 return $return;
 692         }
 693
 694         /**
 695          * Updates the self-contact for the provided user id
 696          *
 697          * @param int     $uid
 698          * @param boolean $update_avatar Force the avatar update
 699          * @return bool   "true" if updated
 700          * @throws HTTPException\InternalServerErrorException
 701          */
 702         public static function updateSelfFromUserID($uid, $update_avatar = false)
 703         {
 704                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 705                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 706                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 707                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 708                 if (!DBA::isResult($self)) {
 709                         return false;
 710                 }
 711
 712                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 713                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 714                 if (!DBA::isResult($user)) {
 715                         return false;
 716                 }
 717
 718                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 719                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 720                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 721                 if (!DBA::isResult($profile)) {
 722                         return false;
 723                 }
 724
 725                 $file_suffix = 'jpg';
 726
 727                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 728                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 729                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 730                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 731                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'matrix' => $profile['matrix'], 'network' => Protocol::DFRN];
 732
 733                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 734                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 735                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 736                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 737                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 738                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 739                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 740                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 741                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 742
 743                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 744                 if (DBA::isResult($avatar)) {
 745                         if ($update_avatar) {
 746                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 747                         }
 748
 749                         // Creating the path to the avatar, beginning with the file suffix
 750                         $types = Images::supportedTypes();
 751                         if (isset($types[$avatar['type']])) {
 752                                 $file_suffix = $types[$avatar['type']];
 753                         }
 754
 755                         // We are adding a timestamp value so that other systems won't use cached content
 756                         $timestamp = strtotime($fields['avatar-date']);
 757
 758                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 759                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 760
 761                         $fields['photo'] = $prefix . '4' . $suffix;
 762                         $fields['thumb'] = $prefix . '5' . $suffix;
 763                         $fields['micro'] = $prefix . '6' . $suffix;
 764                 } else {
 765                         // We hadn't found a photo entry, so we use the default avatar
 766                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 767                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 768                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 769                 }
 770
 771                 $fields['avatar'] = User::getAvatarUrlForId($uid);
 772                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 773                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 774                 $fields['unsearchable'] = !$profile['net-publish'];
 775
 776                 $update = false;
 777
 778                 foreach ($fields as $field => $content) {
 779                         if ($self[$field] != $content) {
 780                                 $update = true;
 781                         }
 782                 }
 783
 784                 if ($update) {
 785                         if ($fields['name'] != $self['name']) {
 786                                 $fields['name-date'] = DateTimeFormat::utcNow();
 787                         }
 788                         $fields['updated'] = DateTimeFormat::utcNow();
 789                         self::update($fields, ['id' => $self['id']]);
 790
 791                         // Update the public contact as well
 792                         $fields['prvkey'] = null;
 793                         $fields['self']   = false;
 794                         self::update($fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 795
 796                         // Update the profile
 797                         $fields = [
 798                                 'photo' => User::getAvatarUrlForId($uid),
 799                                 'thumb' => User::getAvatarUrlForId($uid, Proxy::SIZE_THUMB)
 800                         ];
 801
 802                         DBA::update('profile', $fields, ['uid' => $uid]);
 803                 }
 804
 805                 return $update;
 806         }
 807
 808         /**
 809          * Marks a contact for removal
 810          *
 811          * @param int $id contact id
 812          * @throws HTTPException\InternalServerErrorException
 813          */
 814         public static function remove($id)
 815         {
 816                 // We want just to make sure that we don't delete our "self" contact
 817                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 818                 if (!DBA::isResult($contact)) {
 819                         return;
 820                 }
 821
 822                 // Archive the contact
 823                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 824
 825                 // Delete it in the background
 826                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 827         }
 828
 829         /**
 830          * Sends an unfriend message. Removes the contact for two-way unfriending or sharing only protocols (feed an mail)
 831          *
 832          * @param array   $user    User unfriending
 833          * @param array   $contact Contact unfriended
 834          * @param boolean $two_way Revoke eventual inbound follow as well
 835          * @return bool|null true if successful, false if not, null if no action was performed
 836          * @throws HTTPException\InternalServerErrorException
 837          * @throws \ImagickException
 838          */
 839         public static function terminateFriendship(array $user, array $contact, bool $two_way = false): bool
 840         {
 841                 $result = Protocol::terminateFriendship($user, $contact, $two_way);
 842
 843                 if ($two_way || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
 844                         self::remove($contact['id']);
 845                 } else {
 846                         self::update(['rel' => Contact::FOLLOWER], ['id' => $contact['id']]);
 847                 }
 848
 849                 return $result;
 850         }
 851
 852         /**
 853          * Marks a contact for archival after a communication issue delay
 854          *
 855          * Contact has refused to recognise us as a friend. We will start a countdown.
 856          * If they still don't recognise us in 32 days, the relationship is over,
 857          * and we won't waste any more time trying to communicate with them.
 858          * This provides for the possibility that their database is temporarily messed
 859          * up or some other transient event and that there's a possibility we could recover from it.
 860          *
 861          * @param array $contact contact to mark for archival
 862          * @return null
 863          * @throws HTTPException\InternalServerErrorException
 864          */
 865         public static function markForArchival(array $contact)
 866         {
 867                 if (!isset($contact['url']) && !empty($contact['id'])) {
 868                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 869                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 870                         if (!DBA::isResult($contact)) {
 871                                 return;
 872                         }
 873                 } elseif (!isset($contact['url'])) {
 874                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 875                 }
 876
 877                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 878
 879                 // Contact already archived or "self" contact? => nothing to do
 880                 if ($contact['archive'] || $contact['self']) {
 881                         return;
 882                 }
 883
 884                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 885                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 886                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 887                 } else {
 888                         /* @todo
 889                          * We really should send a notification to the owner after 2-3 weeks
 890                          * so they won't be surprised when the contact vanishes and can take
 891                          * remedial action if this was a serious mistake or glitch
 892                          */
 893
 894                         /// @todo Check for contact vitality via probing
 895                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 896
 897                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 898                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 899                                 /* Relationship is really truly dead. archive them rather than
 900                                  * delete, though if the owner tries to unarchive them we'll start
 901                                  * the whole process over again.
 902                                  */
 903                                 self::update(['archive' => true], ['id' => $contact['id']]);
 904                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 905                         }
 906                 }
 907         }
 908
 909         /**
 910          * Cancels the archival countdown
 911          *
 912          * @see   Contact::markForArchival()
 913          *
 914          * @param array $contact contact to be unmarked for archival
 915          * @return null
 916          * @throws \Exception
 917          */
 918         public static function unmarkForArchival(array $contact)
 919         {
 920                 // Always unarchive the relay contact entry
 921                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 922                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 923                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 924                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 925                                 self::update($fields, $condition);
 926                         }
 927                 }
 928
 929                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 930                 $exists = DBA::exists('contact', $condition);
 931
 932                 // We don't need to update, we never marked this contact for archival
 933                 if (!$exists) {
 934                         return;
 935                 }
 936
 937                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 938
 939                 if (!isset($contact['url']) && !empty($contact['id'])) {
 940                         $fields = ['id', 'url', 'batch'];
 941                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 942                         if (!DBA::isResult($contact)) {
 943                                 return;
 944                         }
 945                 }
 946
 947                 // It's a miracle. Our dead contact has inexplicably come back to life.
 948                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 949                 self::update($fields, ['id' => $contact['id']]);
 950                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 951         }
 952
 953         /**
 954          * Returns the data array for the photo menu of a given contact
 955          *
 956          * @param array $contact contact
 957          * @param int   $uid     optional, default 0
 958          * @return array
 959          * @throws HTTPException\InternalServerErrorException
 960          * @throws \ImagickException
 961          */
 962         public static function photoMenu(array $contact, $uid = 0)
 963         {
 964                 $pm_url = '';
 965                 $status_link = '';
 966                 $photos_link = '';
 967                 $contact_drop_link = '';
 968                 $poke_link = '';
 969
 970                 if ($uid == 0) {
 971                         $uid = local_user();
 972                 }
 973
 974                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 975                         if ($uid == 0) {
 976                                 $profile_link = self::magicLinkByContact($contact);
 977                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 978
 979                                 return $menu;
 980                         }
 981
 982                         // Look for our own contact if the uid doesn't match and isn't public
 983                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 984                         if (DBA::isResult($contact_own)) {
 985                                 return self::photoMenu($contact_own, $uid);
 986                         }
 987                 }
 988
 989                 $sparkle = false;
 990                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 991                         $sparkle = true;
 992                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 993                 } else {
 994                         $profile_link = $contact['url'];
 995                 }
 996
 997                 if ($profile_link === 'mailbox') {
 998                         $profile_link = '';
 999                 }
1000
1001                 if ($sparkle) {
1002                         $status_link = $profile_link . '/status';
1003                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1004                         $profile_link = $profile_link . '/profile';
1005                 }
1006
1007                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1008                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1009                 }
1010
1011                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1012                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1013                 }
1014
1015                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1016
1017                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1018
1019                 if (!$contact['self']) {
1020                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
1021                 }
1022
1023                 $follow_link = '';
1024                 $unfollow_link = '';
1025                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
1026                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1027                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1028                         } elseif(!$contact['pending']) {
1029                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1030                         }
1031                 }
1032
1033                 if (!empty($follow_link) || !empty($unfollow_link)) {
1034                         $contact_drop_link = '';
1035                 }
1036
1037                 /**
1038                  * Menu array:
1039                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1040                  */
1041                 if (empty($contact['uid'])) {
1042                         $menu = [
1043                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1044                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1045                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1046                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1047                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1048                         ];
1049                 } else {
1050                         $menu = [
1051                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1052                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1053                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1054                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1055                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1056                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1057                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1058                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1059                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1060                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1061                         ];
1062
1063                         if (!empty($contact['pending'])) {
1064                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1065                                 if (DBA::isResult($intro)) {
1066                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1067                                 }
1068                         }
1069                 }
1070
1071                 $args = ['contact' => $contact, 'menu' => &$menu];
1072
1073                 Hook::callAll('contact_photo_menu', $args);
1074
1075                 $menucondensed = [];
1076
1077                 foreach ($menu as $menuname => $menuitem) {
1078                         if ($menuitem[1] != '') {
1079                                 $menucondensed[$menuname] = $menuitem;
1080                         }
1081                 }
1082
1083                 return $menucondensed;
1084         }
1085
1086         /**
1087          * Fetch the contact id for a given URL and user
1088          *
1089          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1090          * `addr` or `alias`.
1091          *
1092          * If there's no record and we aren't looking for a public contact, we quit.
1093          * If there's one, we check that it isn't time to update the picture else we
1094          * directly return the found contact id.
1095          *
1096          * Second, we probe the provided $url whether it's http://server.tld/profile or
1097          * nick@server.tld. We quit if we can't get any info back.
1098          *
1099          * Third, we create the contact record if it doesn't exist
1100          *
1101          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1102          * if there's any updates
1103          *
1104          * @param string  $url       Contact URL
1105          * @param integer $uid       The user id for the contact (0 = public contact)
1106          * @param boolean $update    true = always update, false = never update, null = update when not found
1107          * @param array   $default   Default value for creating the contact when everything else fails
1108          *
1109          * @return integer Contact ID
1110          * @throws HTTPException\InternalServerErrorException
1111          * @throws \ImagickException
1112          */
1113         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1114         {
1115                 $contact_id = 0;
1116
1117                 if ($url == '') {
1118                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1119                         return 0;
1120                 }
1121
1122                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1123
1124                 if (!empty($contact)) {
1125                         $contact_id = $contact["id"];
1126
1127                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1128                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1129                                 return $contact_id;
1130                         }
1131                 } elseif ($uid != 0) {
1132                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1133                         return 0;
1134                 } elseif (empty($default) && !is_null($update) && !$update) {
1135                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1136                         return 0;
1137                 }
1138
1139                 $data = [];
1140
1141                 if (empty($default['network']) || $update) {
1142                         $data = Probe::uri($url, "", $uid);
1143
1144                         // Take the default values when probing failed
1145                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1146                                 $data = array_merge($data, $default);
1147                         }
1148                 } elseif (!empty($default['network'])) {
1149                         $data = $default;
1150                 }
1151
1152                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1153                         // Fetch data for the public contact via the first found personal contact
1154                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1155                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1156                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1157                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1158
1159                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1160                         if (!DBA::isResult($personal_contact)) {
1161                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1162                         }
1163
1164                         if (DBA::isResult($personal_contact)) {
1165                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1166                                 $data = $personal_contact;
1167                                 $data['photo'] = $personal_contact['avatar'];
1168                                 $data['account-type'] = $personal_contact['contact-type'];
1169                                 $data['hide'] = $personal_contact['unsearchable'];
1170                                 unset($data['avatar']);
1171                                 unset($data['contact-type']);
1172                                 unset($data['unsearchable']);
1173                         }
1174                 }
1175
1176                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1177                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1178                         return 0;
1179                 }
1180
1181                 if (!$contact_id) {
1182                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1183                         if (!empty($data['alias'])) {
1184                                 $urls[] = Strings::normaliseLink($data['alias']);
1185                         }
1186                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1187                         if (!empty($contact['id'])) {
1188                                 $contact_id = $contact['id'];
1189                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1190                         }
1191                 }
1192
1193                 if (!$contact_id) {
1194                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1195                         $fields = [
1196                                 'uid'       => $uid,
1197                                 'url'       => $data['url'],
1198                                 'nurl'      => Strings::normaliseLink($data['url']),
1199                                 'network'   => $data['network'],
1200                                 'created'   => DateTimeFormat::utcNow(),
1201                                 'rel'       => self::SHARING,
1202                                 'writable'  => 1,
1203                                 'blocked'   => 0,
1204                                 'readonly'  => 0,
1205                                 'pending'   => 0];
1206
1207                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1208
1209                         // Before inserting we do check if the entry does exist now.
1210                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1211                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1212                                 if (DBA::isResult($contact)) {
1213                                         $contact_id = $contact['id'];
1214                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1215                                 } else {
1216                                         $contact_id = self::insert($fields);
1217                                         if ($contact_id) {
1218                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1219                                         }
1220                                 }
1221                                 DI::lock()->release(self::LOCK_INSERT);
1222                         } else {
1223                                 Logger::warning('Contact lock had not been acquired');
1224                         }
1225
1226                         if (!$contact_id) {
1227                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1228                                 return 0;
1229                         }
1230                 } else {
1231                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1232                 }
1233
1234                 self::updateFromProbeArray($contact_id, $data);
1235
1236                 // Don't return a number for a deleted account
1237                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1238                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1239                         return 0;
1240                 }
1241
1242                 return $contact_id;
1243         }
1244
1245         /**
1246          * Checks if the contact is archived
1247          *
1248          * @param int $cid contact id
1249          *
1250          * @return boolean Is the contact archived?
1251          * @throws HTTPException\InternalServerErrorException
1252          */
1253         public static function isArchived(int $cid)
1254         {
1255                 if ($cid == 0) {
1256                         return false;
1257                 }
1258
1259                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1260                 if (!DBA::isResult($contact)) {
1261                         return false;
1262                 }
1263
1264                 if ($contact['archive']) {
1265                         return true;
1266                 }
1267
1268                 // Check status of ActivityPub endpoints
1269                 $apcontact = APContact::getByURL($contact['url'], false);
1270                 if (!empty($apcontact)) {
1271                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1272                                 return true;
1273                         }
1274
1275                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1276                                 return true;
1277                         }
1278                 }
1279
1280                 // Check status of Diaspora endpoints
1281                 if (!empty($contact['batch'])) {
1282                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1283                         return DBA::exists('contact', $condition);
1284                 }
1285
1286                 return false;
1287         }
1288
1289         /**
1290          * Checks if the contact is blocked
1291          *
1292          * @param int $cid contact id
1293          *
1294          * @return boolean Is the contact blocked?
1295          * @throws HTTPException\InternalServerErrorException
1296          */
1297         public static function isBlocked($cid)
1298         {
1299                 if ($cid == 0) {
1300                         return false;
1301                 }
1302
1303                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1304                 if (!DBA::isResult($blocked)) {
1305                         return false;
1306                 }
1307
1308                 if (Network::isUrlBlocked($blocked['url'])) {
1309                         return true;
1310                 }
1311
1312                 return (bool) $blocked['blocked'];
1313         }
1314
1315         /**
1316          * Checks if the contact is hidden
1317          *
1318          * @param int $cid contact id
1319          *
1320          * @return boolean Is the contact hidden?
1321          * @throws \Exception
1322          */
1323         public static function isHidden($cid)
1324         {
1325                 if ($cid == 0) {
1326                         return false;
1327                 }
1328
1329                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1330                 if (!DBA::isResult($hidden)) {
1331                         return false;
1332                 }
1333                 return (bool) $hidden['hidden'];
1334         }
1335
1336         /**
1337          * Returns posts from a given contact url
1338          *
1339          * @param string $contact_url Contact URL
1340          * @param bool   $thread_mode
1341          * @param int    $update      Update mode
1342          * @param int    $parent      Item parent ID for the update mode
1343          * @param bool   $only_media  Only display media content
1344          * @return string posts in HTML
1345          * @throws \Exception
1346          */
1347         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1348         {
1349                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1350         }
1351
1352         /**
1353          * Returns posts from a given contact id
1354          *
1355          * @param int  $cid         Contact ID
1356          * @param bool $thread_mode
1357          * @param int  $update      Update mode
1358          * @param int  $parent      Item parent ID for the update mode
1359          * @param bool $only_media  Only display media content
1360          * @return string posts in HTML
1361          * @throws \Exception
1362          */
1363         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1364         {
1365                 Logger::info('Blubb-1', ['cid' => $cid]);
1366                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1367                 if (!DBA::isResult($contact)) {
1368                         return '';
1369                 }
1370
1371                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1372                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1373                 } else {
1374                         $sql = "`uid` = ?";
1375                 }
1376
1377                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1378
1379                 if ($thread_mode) {
1380                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1381                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1382                 } else {
1383                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1384                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1385                 }
1386
1387                 if (!empty($parent)) {
1388                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1389                 } else {
1390                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1391                         if (!empty($last_received)) {
1392                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1393                         }
1394                 }
1395
1396                 If ($only_media) {
1397                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1398                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1399                 }
1400
1401                 if (DI::mode()->isMobile()) {
1402                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1403                                 DI::config()->get('system', 'itemspage_network_mobile'));
1404                 } else {
1405                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1406                                 DI::config()->get('system', 'itemspage_network'));
1407                 }
1408
1409                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1410
1411                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1412
1413                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1414                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1415                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1416                 } else {
1417                         $o = '';
1418                 }
1419
1420                 if ($thread_mode) {
1421                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1422
1423                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'commented', local_user());
1424                 } else {
1425                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1426                         Logger::info('Blubb-2a', ['cid' => $cid, 'condition' => $condition]);
1427
1428                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1429                 }
1430
1431                 if (!$update) {
1432                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1433                                 $o .= HTML::scrollLoader();
1434                         } else {
1435                                 $o .= $pager->renderMinimal(count($items));
1436                         }
1437                 }
1438
1439                 return $o;
1440         }
1441
1442         /**
1443          * Returns the account type name
1444          *
1445          * The function can be called with either the user or the contact array
1446          *
1447          * @param array $contact contact or user array
1448          * @return string
1449          */
1450         public static function getAccountType(array $contact)
1451         {
1452                 // There are several fields that indicate that the contact or user is a forum
1453                 // "page-flags" is a field in the user table,
1454                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1455                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1456                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1457                         || (isset($contact['forum']) && intval($contact['forum']))
1458                         || (isset($contact['prv']) && intval($contact['prv']))
1459                         || (isset($contact['community']) && intval($contact['community']))
1460                 ) {
1461                         $type = self::TYPE_COMMUNITY;
1462                 } else {
1463                         $type = self::TYPE_PERSON;
1464                 }
1465
1466                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1467                 if (isset($contact["contact-type"])) {
1468                         $type = $contact["contact-type"];
1469                 }
1470
1471                 if (isset($contact["account-type"])) {
1472                         $type = $contact["account-type"];
1473                 }
1474
1475                 switch ($type) {
1476                         case self::TYPE_ORGANISATION:
1477                                 $account_type = DI::l10n()->t("Organisation");
1478                                 break;
1479
1480                         case self::TYPE_NEWS:
1481                                 $account_type = DI::l10n()->t('News');
1482                                 break;
1483
1484                         case self::TYPE_COMMUNITY:
1485                                 $account_type = DI::l10n()->t("Forum");
1486                                 break;
1487
1488                         default:
1489                                 $account_type = "";
1490                                 break;
1491                 }
1492
1493                 return $account_type;
1494         }
1495
1496         /**
1497          * Blocks a contact
1498          *
1499          * @param int $cid
1500          * @return bool
1501          * @throws \Exception
1502          */
1503         public static function block($cid, $reason = null)
1504         {
1505                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1506
1507                 return $return;
1508         }
1509
1510         /**
1511          * Unblocks a contact
1512          *
1513          * @param int $cid
1514          * @return bool
1515          * @throws \Exception
1516          */
1517         public static function unblock($cid)
1518         {
1519                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1520
1521                 return $return;
1522         }
1523
1524         /**
1525          * Ensure that cached avatar exist
1526          *
1527          * @param integer $cid
1528          */
1529         public static function checkAvatarCache(int $cid)
1530         {
1531                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1532                 if (!DBA::isResult($contact)) {
1533                         return;
1534                 }
1535
1536                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1537                         return;
1538                 }
1539
1540                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1541
1542                 self::updateAvatar($cid, $contact['avatar'], true);
1543         }
1544
1545         /**
1546          * Return the photo path for a given contact array in the given size
1547          *
1548          * @param array $contact    contact array
1549          * @param string $field     Fieldname of the photo in the contact array
1550          * @param string $size      Size of the avatar picture
1551          * @param string $avatar    Avatar path that is displayed when no photo had been found
1552          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1553          * @return string photo path
1554          */
1555         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1556         {
1557                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1558                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1559         }
1560
1561         /**
1562          * Return the photo path for a given contact array
1563          *
1564          * @param array  $contact   Contact array
1565          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1566          * @return string photo path
1567          */
1568         public static function getPhoto(array $contact, bool $no_update = false)
1569         {
1570                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1571         }
1572
1573         /**
1574          * Return the photo path (thumb size) for a given contact array
1575          *
1576          * @param array  $contact   Contact array
1577          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1578          * @return string photo path
1579          */
1580         public static function getThumb(array $contact, bool $no_update = false)
1581         {
1582                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1583         }
1584
1585         /**
1586          * Return the photo path (micro size) for a given contact array
1587          *
1588          * @param array  $contact   Contact array
1589          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1590          * @return string photo path
1591          */
1592         public static function getMicro(array $contact, bool $no_update = false)
1593         {
1594                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1595         }
1596
1597         /**
1598          * Check the given contact array for avatar cache fields
1599          *
1600          * @param array $contact
1601          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1602          * @return array contact array with avatar cache fields
1603          */
1604         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1605         {
1606                 $update = false;
1607                 $contact_fields = [];
1608                 $fields = ['photo', 'thumb', 'micro'];
1609                 foreach ($fields as $field) {
1610                         if (isset($contact[$field])) {
1611                                 $contact_fields[] = $field;
1612                         }
1613                         if (isset($contact[$field]) && empty($contact[$field])) {
1614                                 $update = true;
1615                         }
1616                 }
1617
1618                 if (!$update || $no_update) {
1619                         return $contact;
1620                 }
1621
1622                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1623                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1624
1625                         $new_contact = self::getById($contact['id'], $contact_fields);
1626                         if (DBA::isResult($new_contact)) {
1627                                 // We only update the cache fields
1628                                 $contact = array_merge($contact, $new_contact);
1629                         }
1630                 }
1631
1632                 /// add the default avatars if the fields aren't filled
1633                 if (isset($contact['photo']) && empty($contact['photo'])) {
1634                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1635                 }
1636                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1637                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1638                 }
1639                 if (isset($contact['micro']) && empty($contact['micro'])) {
1640                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1641                 }
1642
1643                 return $contact;
1644         }
1645
1646         /**
1647          * Fetch the default avatar for the given contact and size
1648          *
1649          * @param array $contact  contact array
1650          * @param string $size    Size of the avatar picture
1651          * @return string avatar URL
1652          */
1653         public static function getDefaultAvatar(array $contact, string $size)
1654         {
1655                 switch ($size) {
1656                         case Proxy::SIZE_MICRO:
1657                                 $avatar['size'] = 48;
1658                                 $default = self::DEFAULT_AVATAR_MICRO;
1659                                 break;
1660
1661                         case Proxy::SIZE_THUMB:
1662                                 $avatar['size'] = 80;
1663                                 $default = self::DEFAULT_AVATAR_THUMB;
1664                                 break;
1665
1666                         case Proxy::SIZE_SMALL:
1667                         default:
1668                                 $avatar['size'] = 300;
1669                                 $default = self::DEFAULT_AVATAR_PHOTO;
1670                                 break;
1671                 }
1672
1673                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1674                         return DI::baseUrl() . $default;
1675                 }
1676
1677                 if (!empty($contact['xmpp'])) {
1678                         $avatar['email'] = $contact['xmpp'];
1679                 } elseif (!empty($contact['addr'])) {
1680                         $avatar['email'] = $contact['addr'];
1681                 } elseif (!empty($contact['url'])) {
1682                         $avatar['email'] = $contact['url'];
1683                 } else {
1684                         return DI::baseUrl() . $default;
1685                 }
1686
1687                 $avatar['url'] = '';
1688                 $avatar['success'] = false;
1689
1690                 Hook::callAll('avatar_lookup', $avatar);
1691
1692                 if ($avatar['success'] && !empty($avatar['url'])) {
1693                         return $avatar['url'];
1694                 }
1695
1696                 return DI::baseUrl() . $default;
1697         }
1698
1699         /**
1700          * Get avatar link for given contact id
1701          *
1702          * @param integer $cid     contact id
1703          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1704          * @param string  $updated Contact update date
1705          * @return string avatar link
1706          */
1707         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = ''):string
1708         {
1709                 // We have to fetch the "updated" variable when it wasn't provided
1710                 // The parameter can be provided to improve performance
1711                 if (empty($updated)) {
1712                         $contact = self::getById($cid, ['updated']);
1713                         $updated = $contact['updated'] ?? '';
1714                 }
1715
1716                 $url = DI::baseUrl() . '/photo/contact/';
1717                 switch ($size) {
1718                         case Proxy::SIZE_MICRO:
1719                                 $url .= Proxy::PIXEL_MICRO . '/';
1720                                 break;
1721                         case Proxy::SIZE_THUMB:
1722                                 $url .= Proxy::PIXEL_THUMB . '/';
1723                                 break;
1724                         case Proxy::SIZE_SMALL:
1725                                 $url .= Proxy::PIXEL_SMALL . '/';
1726                                 break;
1727                         case Proxy::SIZE_MEDIUM:
1728                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1729                                 break;
1730                         case Proxy::SIZE_LARGE:
1731                                 $url .= Proxy::PIXEL_LARGE . '/';
1732                                 break;
1733                 }
1734                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1735         }
1736
1737         /**
1738          * Get avatar link for given contact URL
1739          *
1740          * @param string  $url  contact url
1741          * @param integer $uid  user id
1742          * @param string  $size One of the ProxyUtils::SIZE_* constants
1743          * @return string avatar link
1744          */
1745         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1746         {
1747                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1748                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1749                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1750                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1751         }
1752
1753         /**
1754          * Get header link for given contact id
1755          *
1756          * @param integer $cid     contact id
1757          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1758          * @param string  $updated Contact update date
1759          * @return string header link
1760          */
1761         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = ''):string
1762         {
1763                 // We have to fetch the "updated" variable when it wasn't provided
1764                 // The parameter can be provided to improve performance
1765                 if (empty($updated)) {
1766                         $contact = self::getById($cid, ['updated']);
1767                         $updated = $contact['updated'] ?? '';
1768                 }
1769
1770                 $url = DI::baseUrl() . '/photo/header/';
1771                 switch ($size) {
1772                         case Proxy::SIZE_MICRO:
1773                                 $url .= Proxy::PIXEL_MICRO . '/';
1774                                 break;
1775                         case Proxy::SIZE_THUMB:
1776                                 $url .= Proxy::PIXEL_THUMB . '/';
1777                                 break;
1778                         case Proxy::SIZE_SMALL:
1779                                 $url .= Proxy::PIXEL_SMALL . '/';
1780                                 break;
1781                         case Proxy::SIZE_MEDIUM:
1782                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1783                                 break;
1784                         case Proxy::SIZE_LARGE:
1785                                 $url .= Proxy::PIXEL_LARGE . '/';
1786                                 break;
1787                 }
1788
1789                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1790         }
1791
1792         /**
1793          * Updates the avatar links in a contact only if needed
1794          *
1795          * @param int    $cid          Contact id
1796          * @param string $avatar       Link to avatar picture
1797          * @param bool   $force        force picture update
1798          * @param bool   $create_cache Enforces the creation of cached avatar fields
1799          *
1800          * @return void
1801          * @throws HTTPException\InternalServerErrorException
1802          * @throws HTTPException\NotFoundException
1803          * @throws \ImagickException
1804          */
1805         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1806         {
1807                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1808                         ['id' => $cid, 'self' => false]);
1809                 if (!DBA::isResult($contact)) {
1810                         return;
1811                 }
1812
1813                 $uid = $contact['uid'];
1814
1815                 // Only update the cached photo links of public contacts when they already are cached
1816                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1817                         if ($contact['avatar'] != $avatar) {
1818                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1819                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1820                         }
1821                         return;
1822                 }
1823
1824                 // User contacts use are updated through the public contacts
1825                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1826                         $pcid = self::getIdForURL($contact['url'], 0, false);
1827                         if (!empty($pcid)) {
1828                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1829                                 self::updateAvatar($pcid, $avatar, $force, true);
1830                                 return;
1831                         }
1832                 }
1833
1834                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1835
1836                 if ($default_avatar) {
1837                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1838                 }
1839
1840                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1841                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1842                                 'photo' => $avatar,
1843                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1844                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1845                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1846                 }
1847
1848                 // Use the data from the self account
1849                 if (empty($fields)) {
1850                         $local_uid = User::getIdForURL($contact['url']);
1851                         if (!empty($local_uid)) {
1852                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1853                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1854                         }
1855                 }
1856
1857                 if (empty($fields)) {
1858                         $update = ($contact['avatar'] != $avatar) || $force;
1859
1860                         if (!$update) {
1861                                 $data = [
1862                                         $contact['photo'] ?? '',
1863                                         $contact['thumb'] ?? '',
1864                                         $contact['micro'] ?? '',
1865                                 ];
1866
1867                                 foreach ($data as $image_uri) {
1868                                         $image_rid = Photo::ridFromURI($image_uri);
1869                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1870                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1871                                                 $update = true;
1872                                         }
1873                                 }
1874                         }
1875
1876                         if ($update) {
1877                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1878                                 if ($photos) {
1879                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1880                                         $update = !empty($fields);
1881                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1882                                 } else {
1883                                         $update = false;
1884                                 }
1885                         }
1886                 } else {
1887                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1888                 }
1889
1890                 if (!$update) {
1891                         return;
1892                 }
1893
1894                 $cids = [];
1895                 $uids = [];
1896                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1897                         // Collect all user contacts of the given public contact
1898                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1899                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1900                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1901                                 $cids[] = $personal_contact['id'];
1902                                 $uids[] = $personal_contact['uid'];
1903                         }
1904                         DBA::close($personal_contacts);
1905
1906                         if (!empty($cids)) {
1907                                 // Delete possibly existing cached user contact avatars
1908                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1909                         }
1910                 }
1911
1912                 $cids[] = $cid;
1913                 $uids[] = $uid;
1914                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1915                 self::update($fields, ['id' => $cids]);
1916         }
1917
1918         public static function deleteContactByUrl(string $url)
1919         {
1920                 // Update contact data for all users
1921                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1922                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1923                 while ($contact = DBA::fetch($contacts)) {
1924                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1925                         self::remove($contact['id']);
1926                 }
1927         }
1928
1929         /**
1930          * Helper function for "updateFromProbe". Updates personal and public contact
1931          *
1932          * @param integer $id      contact id
1933          * @param integer $uid     user id
1934          * @param string  $old_url The previous profile URL of the contact
1935          * @param string  $new_url The profile URL of the contact
1936          * @param array   $fields  The fields that are updated
1937          *
1938          * @throws \Exception
1939          */
1940         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1941         {
1942                 if (!self::update($fields, ['id' => $id])) {
1943                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1944                         return;
1945                 }
1946
1947                 // Search for duplicated contacts and get rid of them
1948                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1949                         return;
1950                 }
1951
1952                 // Archive or unarchive the contact.
1953                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1954                 if (!DBA::isResult($contact)) {
1955                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1956                         return;
1957                 }
1958
1959                 if (isset($fields['failed'])) {
1960                         if ($fields['failed']) {
1961                                 self::markForArchival($contact);
1962                         } else {
1963                                 self::unmarkForArchival($contact);
1964                         }
1965                 }
1966
1967                 if ($contact['uid'] != 0) {
1968                         return;
1969                 }
1970
1971                 // Update contact data for all users
1972                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1973
1974                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1975                 self::update($fields, $condition);
1976
1977                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1978                 $condition['network'] = Protocol::OSTATUS;
1979
1980                 // If the contact failed, propagate the update fields to all contacts
1981                 if (empty($fields['failed'])) {
1982                         unset($fields['last-update']);
1983                         unset($fields['success_update']);
1984                         unset($fields['failure_update']);
1985                 }
1986
1987                 if (empty($fields)) {
1988                         return;
1989                 }
1990
1991                 self::update($fields, $condition);
1992         }
1993
1994         /**
1995          * Remove duplicated contacts
1996          *
1997          * @param string  $nurl  Normalised contact url
1998          * @param integer $uid   User id
1999          * @return boolean
2000          * @throws \Exception
2001          */
2002         public static function removeDuplicates(string $nurl, int $uid)
2003         {
2004                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2005                 $count = DBA::count('contact', $condition);
2006                 if ($count <= 1) {
2007                         return false;
2008                 }
2009
2010                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2011                 if (!DBA::isResult($first_contact)) {
2012                         // Shouldn't happen - so we handle it
2013                         return false;
2014                 }
2015
2016                 $first = $first_contact['id'];
2017                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2018                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2019                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2020                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2021                         return false;
2022                 }
2023
2024                 // Find all duplicates
2025                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2026                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2027                 while ($duplicate = DBA::fetch($duplicates)) {
2028                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2029                                 continue;
2030                         }
2031
2032                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2033                 }
2034                 DBA::close($duplicates);
2035                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2036                 return true;
2037         }
2038
2039         /**
2040          * @param integer $id      contact id
2041          * @param string  $network Optional network we are probing for
2042          * @return boolean
2043          * @throws HTTPException\InternalServerErrorException
2044          * @throws \ImagickException
2045          */
2046         public static function updateFromProbe(int $id, string $network = '')
2047         {
2048                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2049                 if (!DBA::isResult($contact)) {
2050                         return false;
2051                 }
2052
2053                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2054                 return self::updateFromProbeArray($id, $ret);
2055         }
2056
2057         /**
2058          * @param integer $id      contact id
2059          * @param array   $ret     Probed data
2060          * @return boolean
2061          * @throws HTTPException\InternalServerErrorException
2062          * @throws \ImagickException
2063          */
2064         private static function updateFromProbeArray(int $id, array $ret)
2065         {
2066                 /*
2067                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2068                   This will reliably kill your communication with old Friendica contacts.
2069                  */
2070
2071                 // These fields aren't updated by this routine:
2072                 // 'sensitive'
2073
2074                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2075                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2076                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2077                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2078                 if (!DBA::isResult($contact)) {
2079                         return false;
2080                 }
2081
2082                 if (self::isLocal($ret['url'])) {
2083                         if ($contact['uid'] == 0) {
2084                                 Logger::info('Local contacts are not updated here.');
2085                         } else {
2086                                 self::updateFromPublicContact($id, $contact);
2087                         }
2088                         return true;
2089                 }
2090
2091                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2092                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2093                         self::remove($id);
2094
2095                         // Delete all contacts with the same URL
2096                         self::deleteContactByUrl($ret['url']);
2097                         return true;
2098                 }
2099
2100                 $uid = $contact['uid'];
2101                 unset($contact['uid']);
2102
2103                 $uriid = $contact['uri-id'];
2104                 unset($contact['uri-id']);
2105
2106                 $pubkey = $contact['pubkey'];
2107                 unset($contact['pubkey']);
2108
2109                 $contact['photo'] = $contact['avatar'];
2110                 unset($contact['avatar']);
2111
2112                 $updated = DateTimeFormat::utcNow();
2113
2114                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2115                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2116                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2117                         return false;
2118                 }
2119
2120                 // We must not try to update relay contacts via probe. They are no real contacts.
2121                 // We check after the probing to be able to correct falsely detected contact types.
2122                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2123                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2124                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2125                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2126                         return true;
2127                 }
2128
2129                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2130                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2131                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2132                         return false;
2133                 }
2134
2135                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2136                         $cid = self::getIdForURL($ret['url'], 0, false);
2137                         if (!empty($cid) && ($cid != $id)) {
2138                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2139                                 return self::updateFromProbeArray($cid, $ret);
2140                         }
2141                 }
2142
2143                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2144                         $ret['unsearchable'] = $ret['hide'];
2145                 }
2146
2147                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2148                         $ret['forum'] = false;
2149                         $ret['prv'] = false;
2150                         $ret['contact-type'] = $ret['account-type'];
2151                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2152                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2153                                 $ret['prv'] = (bool)!$ret['forum'];
2154                         }
2155                 }
2156
2157                 $new_pubkey = $ret['pubkey'] ?? '';
2158
2159                 if ($uid == 0) {
2160                         $ret['last-item'] = Probe::getLastUpdate($ret);
2161                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2162                 }
2163
2164                 $update = false;
2165                 $guid = $ret['guid'] ?? '';
2166
2167                 // make sure to not overwrite existing values with blank entries except some technical fields
2168                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2169                 foreach ($ret as $key => $val) {
2170                         if (!array_key_exists($key, $contact)) {
2171                                 unset($ret[$key]);
2172                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2173                                 $ret[$key] = $contact[$key];
2174                         } elseif ($ret[$key] != $contact[$key]) {
2175                                 $update = true;
2176                         }
2177                 }
2178
2179                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2180                         $update = true;
2181                 } else {
2182                         unset($ret['last-item']);
2183                 }
2184
2185                 if (empty($uriid)) {
2186                         $update = true;
2187                 }
2188
2189                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2190                         self::updateAvatar($id, $ret['photo'], $update);
2191                 }
2192
2193                 if (!$update) {
2194                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2195
2196                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2197                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2198                         }
2199
2200                         // Update the public contact
2201                         if ($uid != 0) {
2202                                 $contact = self::getByURL($ret['url'], false, ['id']);
2203                                 if (!empty($contact['id'])) {
2204                                         self::updateFromProbeArray($contact['id'], $ret);
2205                                 }
2206                         }
2207
2208                         return true;
2209                 }
2210
2211                 if (empty($guid)) {
2212                         $ret['uri-id'] = ItemURI::getIdByURI($ret['url']);
2213                 } else {
2214                         $ret['uri-id'] = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2215                 }
2216
2217                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2218                 $ret['updated'] = $updated;
2219                 $ret['failed']  = false;
2220
2221                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2222                 if (empty($pubkey) && !empty($new_pubkey)) {
2223                         $ret['pubkey'] = $new_pubkey;
2224                 }
2225
2226                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2227                         $ret['uri-date'] = $updated;
2228                 }
2229
2230                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2231                         $ret['name-date'] = $updated;
2232                 }
2233
2234                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2235                         $ret['last-update'] = $updated;
2236                         $ret['success_update'] = $updated;
2237                 }
2238
2239                 unset($ret['photo']);
2240
2241                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2242
2243                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2244                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2245                 }
2246
2247                 return true;
2248         }
2249
2250         private static function updateFromPublicContact(int $id, array $contact)
2251         {
2252                 $public = self::getByURL($contact['url'], false);
2253
2254                 $fields = [];
2255
2256                 foreach ($contact as $field => $value) {
2257                         if ($field == 'uid') {
2258                                 continue;
2259                         }
2260                         if ($public[$field] != $value) {
2261                                 $fields[$field] = $public[$field];
2262                         }
2263                 }
2264                 if (!empty($fields)) {
2265                         self::update($fields, ['id' => $id, 'self' => false]);
2266                         Logger::info('Updating local contact', ['id' => $id]);
2267                 }
2268         }
2269
2270         /**
2271          * @param integer $url contact url
2272          * @return integer Contact id
2273          * @throws HTTPException\InternalServerErrorException
2274          * @throws \ImagickException
2275          */
2276         public static function updateFromProbeByURL($url)
2277         {
2278                 $id = self::getIdForURL($url);
2279
2280                 if (empty($id)) {
2281                         return $id;
2282                 }
2283
2284                 self::updateFromProbe($id);
2285
2286                 return $id;
2287         }
2288
2289         /**
2290          * Detects the communication protocol for a given contact url.
2291          * This is used to detect Friendica contacts that we can communicate via AP.
2292          *
2293          * @param string $url contact url
2294          * @param string $network Network of that contact
2295          * @return string with protocol
2296          */
2297         public static function getProtocol($url, $network)
2298         {
2299                 if ($network != Protocol::DFRN) {
2300                         return $network;
2301                 }
2302
2303                 $apcontact = APContact::getByURL($url);
2304                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2305                         return Protocol::ACTIVITYPUB;
2306                 } else {
2307                         return $network;
2308                 }
2309         }
2310
2311         /**
2312          * Takes a $uid and a url/handle and adds a new contact
2313          *
2314          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2315          * dfrn_request page.
2316          *
2317          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2318          *
2319          * Returns an array
2320          * $return['success'] boolean true if successful
2321          * $return['message'] error text if success is false.
2322          *
2323          * Takes a $uid and a url/handle and adds a new contact
2324          *
2325          * @param int    $uid         The user id the contact should be created for
2326          * @param string $url         The profile URL of the contact
2327          * @param string $network
2328          * @return array
2329          * @throws HTTPException\InternalServerErrorException
2330          * @throws HTTPException\NotFoundException
2331          * @throws \ImagickException
2332          */
2333         public static function createFromProbeForUser(int $uid, $url, $network = '')
2334         {
2335                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2336
2337                 // remove ajax junk, e.g. Twitter
2338                 $url = str_replace('/#!/', '/', $url);
2339
2340                 if (!Network::isUrlAllowed($url)) {
2341                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2342                         return $result;
2343                 }
2344
2345                 if (Network::isUrlBlocked($url)) {
2346                         $result['message'] = DI::l10n()->t('Blocked domain');
2347                         return $result;
2348                 }
2349
2350                 if (!$url) {
2351                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2352                         return $result;
2353                 }
2354
2355                 $arr = ['url' => $url, 'contact' => []];
2356
2357                 Hook::callAll('follow', $arr);
2358
2359                 if (empty($arr)) {
2360                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2361                         return $result;
2362                 }
2363
2364                 if (!empty($arr['contact']['name'])) {
2365                         $probed = false;
2366                         $ret = $arr['contact'];
2367                 } else {
2368                         $probed = true;
2369                         $ret = Probe::uri($url, $network, $uid);
2370                 }
2371
2372                 if (($network != '') && ($ret['network'] != $network)) {
2373                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2374                         return $result;
2375                 }
2376
2377                 // check if we already have a contact
2378                 // the poll url is more reliable than the profile url, as we may have
2379                 // indirect links or webfinger links
2380
2381                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2382                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2383                 if (!DBA::isResult($contact)) {
2384                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2385                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2386                 }
2387
2388                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2389
2390                 // This extra param just confuses things, remove it
2391                 if ($protocol === Protocol::DIASPORA) {
2392                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2393                 }
2394
2395                 // do we have enough information?
2396                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2397                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2398                         if (empty($ret['poll'])) {
2399                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2400                         }
2401                         if (empty($ret['name'])) {
2402                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2403                         }
2404                         if (empty($ret['url'])) {
2405                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2406                         }
2407                         if (strpos($ret['url'], '@') !== false) {
2408                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2409                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2410                         }
2411                         return $result;
2412                 }
2413
2414                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2415                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2416                         $ret['notify'] = '';
2417                 }
2418
2419                 if (!$ret['notify']) {
2420                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2421                 }
2422
2423                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2424
2425                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2426
2427                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2428
2429                 $pending = false;
2430                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2431                         $pending = (bool)$ret['manually-approve'];
2432                 }
2433
2434                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2435                         $writeable = 1;
2436                 }
2437
2438                 if (DBA::isResult($contact)) {
2439                         // update contact
2440                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2441
2442                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2443                         self::update($fields, ['id' => $contact['id']]);
2444                 } else {
2445                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2446
2447                         // create contact record
2448                         self::insert([
2449                                 'uid'     => $uid,
2450                                 'created' => DateTimeFormat::utcNow(),
2451                                 'url'     => $ret['url'],
2452                                 'nurl'    => Strings::normaliseLink($ret['url']),
2453                                 'addr'    => $ret['addr'],
2454                                 'alias'   => $ret['alias'],
2455                                 'batch'   => $ret['batch'],
2456                                 'notify'  => $ret['notify'],
2457                                 'poll'    => $ret['poll'],
2458                                 'poco'    => $ret['poco'],
2459                                 'name'    => $ret['name'],
2460                                 'nick'    => $ret['nick'],
2461                                 'network' => $ret['network'],
2462                                 'baseurl' => $ret['baseurl'],
2463                                 'gsid'    => $ret['gsid'] ?? null,
2464                                 'protocol' => $protocol,
2465                                 'pubkey'  => $ret['pubkey'],
2466                                 'rel'     => $new_relation,
2467                                 'priority'=> $ret['priority'],
2468                                 'writable'=> $writeable,
2469                                 'hidden'  => $hidden,
2470                                 'blocked' => 0,
2471                                 'readonly'=> 0,
2472                                 'pending' => $pending,
2473                                 'subhub'  => $subhub
2474                         ]);
2475                 }
2476
2477                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2478                 if (!DBA::isResult($contact)) {
2479                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2480                         return $result;
2481                 }
2482
2483                 $contact_id = $contact['id'];
2484                 $result['cid'] = $contact_id;
2485
2486                 Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact_id);
2487
2488                 // Update the avatar
2489                 self::updateAvatar($contact_id, $ret['photo']);
2490
2491                 // pull feed and consume it, which should subscribe to the hub.
2492                 if ($contact['network'] == Protocol::OSTATUS) {
2493                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2494                 }
2495
2496                 if ($probed) {
2497                         self::updateFromProbeArray($contact_id, $ret);
2498                 } else {
2499                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2500                 }
2501
2502                 $owner = User::getOwnerDataById($uid);
2503
2504                 if (DBA::isResult($owner)) {
2505                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2506                                 // create a follow slap
2507                                 $item = [];
2508                                 $item['verb'] = Activity::FOLLOW;
2509                                 $item['gravity'] = GRAVITY_ACTIVITY;
2510                                 $item['follow'] = $contact["url"];
2511                                 $item['body'] = '';
2512                                 $item['title'] = '';
2513                                 $item['guid'] = '';
2514                                 $item['uri-id'] = 0;
2515
2516                                 $slap = OStatus::salmon($item, $owner);
2517
2518                                 if (!empty($contact['notify'])) {
2519                                         Salmon::slapper($owner, $contact['notify'], $slap);
2520                                 }
2521                         } elseif ($protocol == Protocol::DIASPORA) {
2522                                 $ret = Diaspora::sendShare($owner, $contact);
2523                                 Logger::log('share returns: ' . $ret);
2524                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2525                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2526                                 if (empty($activity_id)) {
2527                                         // This really should never happen
2528                                         return false;
2529                                 }
2530
2531                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $uid, $activity_id);
2532                                 Logger::log('Follow returns: ' . $ret);
2533                         }
2534                 }
2535
2536                 $result['success'] = true;
2537                 return $result;
2538         }
2539
2540         /**
2541          * Updated contact's SSL policy
2542          *
2543          * @param array  $contact    Contact array
2544          * @param string $new_policy New policy, valid: self,full
2545          *
2546          * @return array Contact array with updated values
2547          * @throws \Exception
2548          */
2549         public static function updateSslPolicy(array $contact, $new_policy)
2550         {
2551                 $ssl_changed = false;
2552                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2553                         $ssl_changed = true;
2554                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2555                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2556                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2557                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2558                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2559                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2560                 }
2561
2562                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2563                         $ssl_changed = true;
2564                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2565                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2566                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2567                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2568                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2569                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2570                 }
2571
2572                 if ($ssl_changed) {
2573                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2574                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2575                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2576                         self::update($fields, ['id' => $contact['id']]);
2577                 }
2578
2579                 return $contact;
2580         }
2581
2582         /**
2583          * Follow a contact
2584          *
2585          * @param int $cid Public contact id
2586          * @param int $uid  User ID
2587          *
2588          * @return bool "true" if following had been successful
2589          */
2590         public static function follow(int $cid, int $uid)
2591         {
2592                 $contact = self::getById($cid, ['url']);
2593
2594                 $result = self::createFromProbeForUser($uid, $contact['url']);
2595
2596                 return $result['cid'];
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::insertNotication($contact['id'], Verb::getID(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::log('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, $photo, true);
2716
2717                         Post\UserNotification::insertNotication($contact_id, Verb::getID(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                                 $hash = Strings::getRandomHex();
2727
2728                                 if (is_array($contact_record)) {
2729                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2730                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2731                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2732                                 }
2733
2734                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2735
2736                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2737                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2738
2739                                         notification([
2740                                                 'type'  => Notification\Type::INTRO,
2741                                                 'otype' => Notification\ObjectType::INTRO,
2742                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2743                                                 'uid'   => $user['uid'],
2744                                                 'cid'   => $contact_record['id'],
2745                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2746                                         ]);
2747                                 }
2748                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2749                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2750                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2751                                 }
2752
2753                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2754                                 $fields = ['pending' => false];
2755                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2756                                         $fields['rel'] = self::FRIEND;
2757                                 }
2758
2759                                 self::update($fields, $condition);
2760
2761                                 return true;
2762                         }
2763                 }
2764
2765                 return null;
2766         }
2767
2768         public static function removeFollower(array $contact)
2769         {
2770                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2771                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2772                 } elseif (!empty($contact['id'])) {
2773                         self::remove($contact['id']);
2774                 } else {
2775                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2776                 }
2777         }
2778
2779         public static function removeSharer($importer, $contact)
2780         {
2781                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2782                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2783                 } else {
2784                         self::remove($contact['id']);
2785                 }
2786         }
2787
2788         /**
2789          * Create a birthday event.
2790          *
2791          * Update the year and the birthday.
2792          */
2793         public static function updateBirthdays()
2794         {
2795                 $condition = [
2796                         '`bd` > ?
2797                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2798                         AND NOT `contact`.`pending`
2799                         AND NOT `contact`.`hidden`
2800                         AND NOT `contact`.`blocked`
2801                         AND NOT `contact`.`archive`
2802                         AND NOT `contact`.`deleted`',
2803                         DBA::NULL_DATE,
2804                         self::SHARING,
2805                         self::FRIEND
2806                 ];
2807
2808                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2809
2810                 while ($contact = DBA::fetch($contacts)) {
2811                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2812
2813                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2814
2815                         if (Event::createBirthday($contact, $nextbd)) {
2816                                 // update bdyear
2817                                 DBA::update(
2818                                         'contact',
2819                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2820                                         ['id' => $contact['id']]
2821                                 );
2822                         }
2823                 }
2824                 DBA::close($contacts);
2825         }
2826
2827         /**
2828          * Remove the unavailable contact ids from the provided list
2829          *
2830          * @param array $contact_ids Contact id list
2831          * @return array
2832          * @throws \Exception
2833          */
2834         public static function pruneUnavailable(array $contact_ids)
2835         {
2836                 if (empty($contact_ids)) {
2837                         return [];
2838                 }
2839
2840                 $contacts = self::selectToArray(['id'], [
2841                         'id'      => $contact_ids,
2842                         'blocked' => false,
2843                         'pending' => false,
2844                         'archive' => false,
2845                 ]);
2846
2847                 return array_column($contacts, 'id');
2848         }
2849
2850         /**
2851          * Returns a magic link to authenticate remote visitors
2852          *
2853          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2854          *
2855          * @param string $contact_url The address of the target contact profile
2856          * @param string $url         An url that we will be redirected to after the authentication
2857          *
2858          * @return string with "redir" link
2859          * @throws HTTPException\InternalServerErrorException
2860          * @throws \ImagickException
2861          */
2862         public static function magicLink($contact_url, $url = '')
2863         {
2864                 if (!Session::isAuthenticated()) {
2865                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2866                 }
2867
2868                 $contact = self::getByURL($contact_url, false);
2869                 if (empty($contact)) {
2870                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2871                 }
2872
2873                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2874                 unset($contact['uid']);
2875
2876                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2877         }
2878
2879         /**
2880          * Returns a magic link to authenticate remote visitors
2881          *
2882          * @param integer $cid The contact id of the target contact profile
2883          * @param string  $url An url that we will be redirected to after the authentication
2884          *
2885          * @return string with "redir" link
2886          * @throws HTTPException\InternalServerErrorException
2887          * @throws \ImagickException
2888          */
2889         public static function magicLinkById($cid, $url = '')
2890         {
2891                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2892
2893                 return self::magicLinkByContact($contact, $url);
2894         }
2895
2896         /**
2897          * Returns a magic link to authenticate remote visitors
2898          *
2899          * @param array  $contact The contact array with "uid", "network" and "url"
2900          * @param string $url     An url that we will be redirected to after the authentication
2901          *
2902          * @return string with "redir" link
2903          * @throws HTTPException\InternalServerErrorException
2904          * @throws \ImagickException
2905          */
2906         public static function magicLinkByContact($contact, $url = '')
2907         {
2908                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2909
2910                 if (!Session::isAuthenticated()) {
2911                         return $destination;
2912                 }
2913
2914                 // Only redirections to the same host do make sense
2915                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2916                         return $url;
2917                 }
2918
2919                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2920                         return 'contact/' . $contact['id'] . '/conversations';
2921                 }
2922
2923                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2924                         return $destination;
2925                 }
2926
2927                 if (empty($contact['id'])) {
2928                         return $destination;
2929                 }
2930
2931                 $redirect = 'redir/' . $contact['id'];
2932
2933                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2934                         $redirect .= '?url=' . $url;
2935                 }
2936
2937                 return $redirect;
2938         }
2939
2940         /**
2941          * Is the contact a forum?
2942          *
2943          * @param integer $contactid ID of the contact
2944          *
2945          * @return boolean "true" if it is a forum
2946          */
2947         public static function isForum($contactid)
2948         {
2949                 $fields = ['forum', 'prv'];
2950                 $condition = ['id' => $contactid];
2951                 $contact = DBA::selectFirst('contact', $fields, $condition);
2952                 if (!DBA::isResult($contact)) {
2953                         return false;
2954                 }
2955
2956                 // Is it a forum?
2957                 return ($contact['forum'] || $contact['prv']);
2958         }
2959
2960         /**
2961          * Can the remote contact receive private messages?
2962          *
2963          * @param array $contact
2964          * @return bool
2965          */
2966         public static function canReceivePrivateMessages(array $contact)
2967         {
2968                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2969                 $self = $contact['self'] ?? false;
2970
2971                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2972         }
2973
2974         /**
2975          * Search contact table by nick or name
2976          *
2977          * @param string $search Name or nick
2978          * @param string $mode   Search mode (e.g. "community")
2979          * @param int    $uid    User ID
2980          *
2981          * @return array with search results
2982          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2983          */
2984         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2985         {
2986                 if (empty($search)) {
2987                         return [];
2988                 }
2989
2990                 // check supported networks
2991                 if (DI::config()->get('system', 'diaspora_enabled')) {
2992                         $diaspora = Protocol::DIASPORA;
2993                 } else {
2994                         $diaspora = Protocol::DFRN;
2995                 }
2996
2997                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2998                         $ostatus = Protocol::OSTATUS;
2999                 } else {
3000                         $ostatus = Protocol::DFRN;
3001                 }
3002
3003                 // check if we search only communities or every contact
3004                 if ($mode === 'community') {
3005                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
3006                 } else {
3007                         $extra_sql = '';
3008                 }
3009
3010                 $search .= '%';
3011
3012                 $results = DBA::p("SELECT * FROM `contact`
3013                         WHERE (NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` where `publish` OR `net-publish`))
3014                                 AND `network` IN (?, ?, ?, ?) AND
3015                                 NOT `failed` AND `uid` = ? AND
3016                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
3017                                 ORDER BY `nurl` DESC LIMIT 1000",
3018                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $uid, $search, $search, $search
3019                 );
3020
3021                 $contacts = DBA::toArray($results);
3022                 return $contacts;
3023         }
3024
3025         /**
3026          * Add public contacts from an array
3027          *
3028          * @param array $urls
3029          * @return array result "count", "added" and "updated"
3030          */
3031         public static function addByUrls(array $urls)
3032         {
3033                 $added = 0;
3034                 $updated = 0;
3035                 $unchanged = 0;
3036                 $count = 0;
3037
3038                 foreach ($urls as $url) {
3039                         if (empty($url) || !is_string($url)) {
3040                                 continue;
3041                         }
3042                         $contact = self::getByURL($url, false, ['id', 'updated']);
3043                         if (empty($contact['id'])) {
3044                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3045                                 ++$added;
3046                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3047                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3048                                 ++$updated;
3049                         } else {
3050                                 ++$unchanged;
3051                         }
3052                         ++$count;
3053                 }
3054
3055                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3056         }
3057
3058         /**
3059          * Returns a random, global contact array of the current node
3060          *
3061          * @return array The profile array
3062          * @throws Exception
3063          */
3064         public static function getRandomContact()
3065         {
3066                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3067                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3068                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3069                 ], ['order' => ['RAND()']]);
3070
3071                 if (DBA::isResult($contact)) {
3072                         return $contact;
3073                 }
3074
3075                 return [];
3076         }
3077 }