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\DFRN;
  42 use Friendica\Protocol\Diaspora;
  43 use Friendica\Protocol\OStatus;
  44 use Friendica\Protocol\Salmon;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50
  51 /**
  52  * functions for interacting with a contact
  53  */
  54 class Contact
  55 {
  56         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  57         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  58         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  59
  60         /**
  61          * @deprecated since version 2019.03
  62          * @see User::PAGE_FLAGS_NORMAL
  63          */
  64         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  65         /**
  66          * @deprecated since version 2019.03
  67          * @see User::PAGE_FLAGS_SOAPBOX
  68          */
  69         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  70         /**
  71          * @deprecated since version 2019.03
  72          * @see User::PAGE_FLAGS_COMMUNITY
  73          */
  74         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  75         /**
  76          * @deprecated since version 2019.03
  77          * @see User::PAGE_FLAGS_FREELOVE
  78          */
  79         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  80         /**
  81          * @deprecated since version 2019.03
  82          * @see User::PAGE_FLAGS_BLOG
  83          */
  84         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  85         /**
  86          * @deprecated since version 2019.03
  87          * @see User::PAGE_FLAGS_PRVGROUP
  88          */
  89         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  90         /**
  91          * @}
  92          */
  93
  94         const LOCK_INSERT = 'contact-insert';
  95
  96         /**
  97          * Account types
  98          *
  99          * TYPE_UNKNOWN - unknown type
 100          *
 101          * TYPE_PERSON - the account belongs to a person
 102          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
 103          *
 104          * TYPE_ORGANISATION - the account belongs to an organisation
 105          *      Associated page type: PAGE_SOAPBOX
 106          *
 107          * TYPE_NEWS - the account is a news reflector
 108          *      Associated page type: PAGE_SOAPBOX
 109          *
 110          * TYPE_COMMUNITY - the account is community forum
 111          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 112          *
 113          * TYPE_RELAY - the account is a relay
 114          *      This will only be assigned to contacts, not to user accounts
 115          * @{
 116          */
 117         const TYPE_UNKNOWN =     -1;
 118         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 119         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 120         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 121         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 122         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 123         /**
 124          * @}
 125          */
 126
 127         /**
 128          * Contact_is
 129          *
 130          * Relationship types
 131          * @{
 132          */
 133         const NOTHING  = 0;
 134         const FOLLOWER = 1;
 135         const SHARING  = 2;
 136         const FRIEND   = 3;
 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 boolean was the insert successful?
 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                 $ret = DBA::insert('contact', $fields, $duplicate_mode);
 195                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 196                 if (!DBA::isResult($contact)) {
 197                         // Shouldn't happen
 198                         return $ret;
 199                 }
 200
 201                 // Search for duplicated contacts and get rid of them
 202                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 203
 204                 return $ret;
 205         }
 206
 207         /**
 208          * @param integer $id     Contact ID
 209          * @param array   $fields Array of selected fields, empty for all
 210          * @return array|boolean Contact record if it exists, false otherwise
 211          * @throws \Exception
 212          */
 213         public static function getById($id, $fields = [])
 214         {
 215                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 216         }
 217
 218         /**
 219          * Fetches a contact by a given url
 220          *
 221          * @param string  $url    profile url
 222          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 223          * @param array   $fields Field list
 224          * @param integer $uid    User ID of the contact
 225          * @return array contact array
 226          */
 227         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 228         {
 229                 if ($update || is_null($update)) {
 230                         $cid = self::getIdForURL($url, $uid, $update);
 231                         if (empty($cid)) {
 232                                 return [];
 233                         }
 234
 235                         $contact = self::getById($cid, $fields);
 236                         if (empty($contact)) {
 237                                 return [];
 238                         }
 239                         return $contact;
 240                 }
 241
 242                 // Add internal fields
 243                 $removal = [];
 244                 if (!empty($fields)) {
 245                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 246                                 if (!in_array($internal, $fields)) {
 247                                         $fields[] = $internal;
 248                                         $removal[] = $internal;
 249                                 }
 250                         }
 251                 }
 252
 253                 // We first try the nurl (http://server.tld/nick), most common case
 254                 $options = ['order' => ['id']];
 255                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 256
 257                 // Then the addr (nick@server.tld)
 258                 if (!DBA::isResult($contact)) {
 259                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 260                 }
 261
 262                 // Then the alias (which could be anything)
 263                 if (!DBA::isResult($contact)) {
 264                         // The link could be provided as http although we stored it as https
 265                         $ssl_url = str_replace('http://', 'https://', $url);
 266                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 267                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 268                 }
 269
 270                 if (!DBA::isResult($contact)) {
 271                         return [];
 272                 }
 273
 274                 // Update the contact in the background if needed
 275                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 276                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 277                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 278                 }
 279
 280                 // Remove the internal fields
 281                 foreach ($removal as $internal) {
 282                         unset($contact[$internal]);
 283                 }
 284
 285                 return $contact;
 286         }
 287
 288         /**
 289          * Fetches a contact for a given user by a given url.
 290          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 291          *
 292          * @param string  $url    profile url
 293          * @param integer $uid    User ID of the contact
 294          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 295          * @param array   $fields Field list
 296          * @return array contact array
 297          */
 298         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 299         {
 300                 if ($uid != 0) {
 301                         $contact = self::getByURL($url, $update, $fields, $uid);
 302                         if (!empty($contact)) {
 303                                 if (!empty($contact['id'])) {
 304                                         $contact['cid'] = $contact['id'];
 305                                         $contact['zid'] = 0;
 306                                 }
 307                                 return $contact;
 308                         }
 309                 }
 310
 311                 $contact = self::getByURL($url, $update, $fields);
 312                 if (!empty($contact['id'])) {
 313                         $contact['cid'] = 0;
 314                         $contact['zid'] = $contact['id'];
 315                 }
 316                 return $contact;
 317         }
 318
 319         /**
 320          * Tests if the given contact is a follower
 321          *
 322          * @param int $cid Either public contact id or user's contact id
 323          * @param int $uid User ID
 324          *
 325          * @return boolean is the contact id a follower?
 326          * @throws HTTPException\InternalServerErrorException
 327          * @throws \ImagickException
 328          */
 329         public static function isFollower($cid, $uid)
 330         {
 331                 if (Contact\User::isBlocked($cid, $uid)) {
 332                         return false;
 333                 }
 334
 335                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 336                 if (empty($cdata['user'])) {
 337                         return false;
 338                 }
 339
 340                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 341                 return DBA::exists('contact', $condition);
 342         }
 343
 344         /**
 345          * Tests if the given contact url is a follower
 346          *
 347          * @param string $url Contact URL
 348          * @param int    $uid User ID
 349          *
 350          * @return boolean is the contact id a follower?
 351          * @throws HTTPException\InternalServerErrorException
 352          * @throws \ImagickException
 353          */
 354         public static function isFollowerByURL($url, $uid)
 355         {
 356                 $cid = self::getIdForURL($url, $uid);
 357
 358                 if (empty($cid)) {
 359                         return false;
 360                 }
 361
 362                 return self::isFollower($cid, $uid);
 363         }
 364
 365         /**
 366          * Tests if the given user follow the given contact
 367          *
 368          * @param int $cid Either public contact id or user's contact id
 369          * @param int $uid User ID
 370          *
 371          * @return boolean is the contact url being followed?
 372          * @throws HTTPException\InternalServerErrorException
 373          * @throws \ImagickException
 374          */
 375         public static function isSharing($cid, $uid)
 376         {
 377                 if (Contact\User::isBlocked($cid, $uid)) {
 378                         return false;
 379                 }
 380
 381                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 382                 if (empty($cdata['user'])) {
 383                         return false;
 384                 }
 385
 386                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 387                 return DBA::exists('contact', $condition);
 388         }
 389
 390         /**
 391          * Tests if the given user follow the given contact url
 392          *
 393          * @param string $url Contact URL
 394          * @param int    $uid User ID
 395          *
 396          * @return boolean is the contact url being followed?
 397          * @throws HTTPException\InternalServerErrorException
 398          * @throws \ImagickException
 399          */
 400         public static function isSharingByURL($url, $uid)
 401         {
 402                 $cid = self::getIdForURL($url, $uid);
 403
 404                 if (empty($cid)) {
 405                         return false;
 406                 }
 407
 408                 return self::isSharing($cid, $uid);
 409         }
 410
 411         /**
 412          * Get the basepath for a given contact link
 413          *
 414          * @param string $url The contact link
 415          * @param boolean $dont_update Don't update the contact
 416          *
 417          * @return string basepath
 418          * @throws HTTPException\InternalServerErrorException
 419          * @throws \ImagickException
 420          */
 421         public static function getBasepath($url, $dont_update = false)
 422         {
 423                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 424                 if (!DBA::isResult($contact)) {
 425                         return '';
 426                 }
 427
 428                 if (!empty($contact['baseurl'])) {
 429                         return $contact['baseurl'];
 430                 } elseif ($dont_update) {
 431                         return '';
 432                 }
 433
 434                 // Update the existing contact
 435                 self::updateFromProbe($contact['id']);
 436
 437                 // And fetch the result
 438                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 439                 if (empty($contact['baseurl'])) {
 440                         Logger::info('No baseurl for contact', ['url' => $url]);
 441                         return '';
 442                 }
 443
 444                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 445                 return $contact['baseurl'];
 446         }
 447
 448         /**
 449          * Check if the given contact url is on the same server
 450          *
 451          * @param string $url The contact link
 452          *
 453          * @return boolean Is it the same server?
 454          */
 455         public static function isLocal($url)
 456         {
 457                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 458         }
 459
 460         /**
 461          * Check if the given contact ID is on the same server
 462          *
 463          * @param string $url The contact link
 464          *
 465          * @return boolean Is it the same server?
 466          */
 467         public static function isLocalById(int $cid)
 468         {
 469                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 470                 if (!DBA::isResult($contact)) {
 471                         return false;
 472                 }
 473
 474                 if (empty($contact['baseurl'])) {
 475                         $baseurl = self::getBasepath($contact['url'], true);
 476                 } else {
 477                         $baseurl = $contact['baseurl'];
 478                 }
 479
 480                 return Strings::compareLink($baseurl, DI::baseUrl());
 481         }
 482
 483         /**
 484          * Returns the public contact id of the given user id
 485          *
 486          * @param  integer $uid User ID
 487          *
 488          * @return integer|boolean Public contact id for given user id
 489          * @throws \Exception
 490          */
 491         public static function getPublicIdByUserId($uid)
 492         {
 493                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 494                 if (!DBA::isResult($self)) {
 495                         return false;
 496                 }
 497                 return self::getIdForURL($self['url']);
 498         }
 499
 500         /**
 501          * Returns the contact id for the user and the public contact id for a given contact id
 502          *
 503          * @param int $cid Either public contact id or user's contact id
 504          * @param int $uid User ID
 505          *
 506          * @return array with public and user's contact id
 507          * @throws HTTPException\InternalServerErrorException
 508          * @throws \ImagickException
 509          */
 510         public static function getPublicAndUserContacID($cid, $uid)
 511         {
 512                 if (empty($uid) || empty($cid)) {
 513                         return [];
 514                 }
 515
 516                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 517                 if (!DBA::isResult($contact)) {
 518                         return [];
 519                 }
 520
 521                 // We quit when the user id don't match the user id of the provided contact
 522                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 523                         return [];
 524                 }
 525
 526                 if ($contact['uid'] != 0) {
 527                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 528                         if (empty($pcid)) {
 529                                 return [];
 530                         }
 531                         $ucid = $contact['id'];
 532                 } else {
 533                         $pcid = $contact['id'];
 534                         $ucid = self::getIdForURL($contact['url'], $uid);
 535                 }
 536
 537                 return ['public' => $pcid, 'user' => $ucid];
 538         }
 539
 540         /**
 541          * Returns contact details for a given contact id in combination with a user id
 542          *
 543          * @param int $cid A contact ID
 544          * @param int $uid The User ID
 545          * @param array $fields The selected fields for the contact
 546          *
 547          * @return array The contact details
 548          *
 549          * @throws \Exception
 550          */
 551         public static function getContactForUser($cid, $uid, array $fields = [])
 552         {
 553                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 554
 555                 if (!DBA::isResult($contact)) {
 556                         return [];
 557                 } else {
 558                         return $contact;
 559                 }
 560         }
 561
 562         /**
 563          * Creates the self-contact for the provided user id
 564          *
 565          * @param int $uid
 566          * @return bool Operation success
 567          * @throws HTTPException\InternalServerErrorException
 568          */
 569         public static function createSelfFromUserId($uid)
 570         {
 571                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 572                         ['uid' => $uid, 'account_expired' => false]);
 573                 if (!DBA::isResult($user)) {
 574                         return false;
 575                 }
 576
 577                 $contact = [
 578                         'uid'         => $user['uid'],
 579                         'created'     => DateTimeFormat::utcNow(),
 580                         'self'        => 1,
 581                         'name'        => $user['username'],
 582                         'nick'        => $user['nickname'],
 583                         'pubkey'      => $user['pubkey'],
 584                         'prvkey'      => $user['prvkey'],
 585                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 586                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 587                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 588                         'blocked'     => 0,
 589                         'pending'     => 0,
 590                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 591                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 592                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 593                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 594                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 595                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 596                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 597                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 598                         'name-date'   => DateTimeFormat::utcNow(),
 599                         'uri-date'    => DateTimeFormat::utcNow(),
 600                         'avatar-date' => DateTimeFormat::utcNow(),
 601                         'closeness'   => 0
 602                 ];
 603
 604                 $return = true;
 605
 606                 // Only create the entry if it doesn't exist yet
 607                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 608                         $return = DBA::insert('contact', $contact);
 609                 }
 610
 611                 // Create the public contact
 612                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 613                         $contact['self']   = false;
 614                         $contact['uid']    = 0;
 615                         $contact['prvkey'] = null;
 616
 617                         DBA::insert('contact', $contact, Database::INSERT_IGNORE);
 618                 }
 619
 620                 return $return;
 621         }
 622
 623         /**
 624          * Updates the self-contact for the provided user id
 625          *
 626          * @param int     $uid
 627          * @param boolean $update_avatar Force the avatar update
 628          * @return bool   "true" if updated
 629          * @throws HTTPException\InternalServerErrorException
 630          */
 631         public static function updateSelfFromUserID($uid, $update_avatar = false)
 632         {
 633                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 634                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 635                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 636                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 637                 if (!DBA::isResult($self)) {
 638                         return false;
 639                 }
 640
 641                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 642                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 643                 if (!DBA::isResult($user)) {
 644                         return false;
 645                 }
 646
 647                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 648                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 649                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 650                 if (!DBA::isResult($profile)) {
 651                         return false;
 652                 }
 653
 654                 $file_suffix = 'jpg';
 655
 656                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 657                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 658                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 659                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 660                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'network' => Protocol::DFRN];
 661
 662                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 663                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 664                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 665                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 666                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 667                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 668                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 669                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 670                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 671
 672                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 673                 if (DBA::isResult($avatar)) {
 674                         if ($update_avatar) {
 675                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 676                         }
 677
 678                         // Creating the path to the avatar, beginning with the file suffix
 679                         $types = Images::supportedTypes();
 680                         if (isset($types[$avatar['type']])) {
 681                                 $file_suffix = $types[$avatar['type']];
 682                         }
 683
 684                         // We are adding a timestamp value so that other systems won't use cached content
 685                         $timestamp = strtotime($fields['avatar-date']);
 686
 687                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 688                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 689
 690                         $fields['photo'] = $prefix . '4' . $suffix;
 691                         $fields['thumb'] = $prefix . '5' . $suffix;
 692                         $fields['micro'] = $prefix . '6' . $suffix;
 693                 } else {
 694                         // We hadn't found a photo entry, so we use the default avatar
 695                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 696                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 697                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 698                 }
 699
 700                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 701                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 702                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 703                 $fields['unsearchable'] = !$profile['net-publish'];
 704
 705                 $update = false;
 706
 707                 foreach ($fields as $field => $content) {
 708                         if ($self[$field] != $content) {
 709                                 $update = true;
 710                         }
 711                 }
 712
 713                 if ($update) {
 714                         if ($fields['name'] != $self['name']) {
 715                                 $fields['name-date'] = DateTimeFormat::utcNow();
 716                         }
 717                         $fields['updated'] = DateTimeFormat::utcNow();
 718                         DBA::update('contact', $fields, ['id' => $self['id']]);
 719
 720                         // Update the public contact as well
 721                         $fields['prvkey'] = null;
 722                         $fields['self']   = false;
 723                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 724
 725                         // Update the profile
 726                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 727                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 728                         DBA::update('profile', $fields, ['uid' => $uid]);
 729                 }
 730
 731                 return $update;
 732         }
 733
 734         /**
 735          * Marks a contact for removal
 736          *
 737          * @param int $id contact id
 738          * @return null
 739          * @throws HTTPException\InternalServerErrorException
 740          */
 741         public static function remove($id)
 742         {
 743                 // We want just to make sure that we don't delete our "self" contact
 744                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 745                 if (!DBA::isResult($contact)) {
 746                         return;
 747                 }
 748
 749                 // Archive the contact
 750                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 751
 752                 // Delete it in the background
 753                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 754         }
 755
 756         /**
 757          * Sends an unfriend message. Does not remove the contact
 758          *
 759          * @param array   $user     User unfriending
 760          * @param array   $contact  Contact unfriended
 761          * @param boolean $dissolve Remove the contact on the remote side
 762          * @return void
 763          * @throws HTTPException\InternalServerErrorException
 764          * @throws \ImagickException
 765          */
 766         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 767         {
 768                 if (empty($contact['network'])) {
 769                         return;
 770                 }
 771
 772                 $protocol = $contact['network'];
 773                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 774                         $protocol = Protocol::ACTIVITYPUB;
 775                 }
 776
 777                 if (($protocol == Protocol::DFRN) && $dissolve) {
 778                         DFRN::deliver($user, $contact, 'placeholder', true);
 779                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 780                         // create an unfollow slap
 781                         $item = [];
 782                         $item['verb'] = Activity::O_UNFOLLOW;
 783                         $item['gravity'] = GRAVITY_ACTIVITY;
 784                         $item['follow'] = $contact["url"];
 785                         $item['body'] = '';
 786                         $item['title'] = '';
 787                         $item['guid'] = '';
 788                         $item['uri-id'] = 0;
 789                         $slap = OStatus::salmon($item, $user);
 790
 791                         if (!empty($contact['notify'])) {
 792                                 Salmon::slapper($user, $contact['notify'], $slap);
 793                         }
 794                 } elseif ($protocol == Protocol::DIASPORA) {
 795                         Diaspora::sendUnshare($user, $contact);
 796                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 797                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 798
 799                         if ($dissolve) {
 800                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 801                         }
 802                 }
 803         }
 804
 805         /**
 806          * Marks a contact for archival after a communication issue delay
 807          *
 808          * Contact has refused to recognise us as a friend. We will start a countdown.
 809          * If they still don't recognise us in 32 days, the relationship is over,
 810          * and we won't waste any more time trying to communicate with them.
 811          * This provides for the possibility that their database is temporarily messed
 812          * up or some other transient event and that there's a possibility we could recover from it.
 813          *
 814          * @param array $contact contact to mark for archival
 815          * @return null
 816          * @throws HTTPException\InternalServerErrorException
 817          */
 818         public static function markForArchival(array $contact)
 819         {
 820                 if (!isset($contact['url']) && !empty($contact['id'])) {
 821                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 822                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 823                         if (!DBA::isResult($contact)) {
 824                                 return;
 825                         }
 826                 } elseif (!isset($contact['url'])) {
 827                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 828                 }
 829
 830                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 831
 832                 // Contact already archived or "self" contact? => nothing to do
 833                 if ($contact['archive'] || $contact['self']) {
 834                         return;
 835                 }
 836
 837                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 838                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 839                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 840                 } else {
 841                         /* @todo
 842                          * We really should send a notification to the owner after 2-3 weeks
 843                          * so they won't be surprised when the contact vanishes and can take
 844                          * remedial action if this was a serious mistake or glitch
 845                          */
 846
 847                         /// @todo Check for contact vitality via probing
 848                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 849
 850                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 851                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 852                                 /* Relationship is really truly dead. archive them rather than
 853                                  * delete, though if the owner tries to unarchive them we'll start
 854                                  * the whole process over again.
 855                                  */
 856                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 857                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 858                         }
 859                 }
 860         }
 861
 862         /**
 863          * Cancels the archival countdown
 864          *
 865          * @see   Contact::markForArchival()
 866          *
 867          * @param array $contact contact to be unmarked for archival
 868          * @return null
 869          * @throws \Exception
 870          */
 871         public static function unmarkForArchival(array $contact)
 872         {
 873                 // Always unarchive the relay contact entry
 874                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 875                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 876                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 877                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 878                                 DBA::update('contact', $fields, $condition);
 879                         }
 880                 }
 881
 882                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 883                 $exists = DBA::exists('contact', $condition);
 884
 885                 // We don't need to update, we never marked this contact for archival
 886                 if (!$exists) {
 887                         return;
 888                 }
 889
 890                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 891
 892                 if (!isset($contact['url']) && !empty($contact['id'])) {
 893                         $fields = ['id', 'url', 'batch'];
 894                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 895                         if (!DBA::isResult($contact)) {
 896                                 return;
 897                         }
 898                 }
 899
 900                 // It's a miracle. Our dead contact has inexplicably come back to life.
 901                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 902                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 903                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 904         }
 905
 906         /**
 907          * Returns the data array for the photo menu of a given contact
 908          *
 909          * @param array $contact contact
 910          * @param int   $uid     optional, default 0
 911          * @return array
 912          * @throws HTTPException\InternalServerErrorException
 913          * @throws \ImagickException
 914          */
 915         public static function photoMenu(array $contact, $uid = 0)
 916         {
 917                 $pm_url = '';
 918                 $status_link = '';
 919                 $photos_link = '';
 920                 $contact_drop_link = '';
 921                 $poke_link = '';
 922
 923                 if ($uid == 0) {
 924                         $uid = local_user();
 925                 }
 926
 927                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 928                         if ($uid == 0) {
 929                                 $profile_link = self::magicLinkByContact($contact);
 930                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 931
 932                                 return $menu;
 933                         }
 934
 935                         // Look for our own contact if the uid doesn't match and isn't public
 936                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 937                         if (DBA::isResult($contact_own)) {
 938                                 return self::photoMenu($contact_own, $uid);
 939                         }
 940                 }
 941
 942                 $sparkle = false;
 943                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 944                         $sparkle = true;
 945                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 946                 } else {
 947                         $profile_link = $contact['url'];
 948                 }
 949
 950                 if ($profile_link === 'mailbox') {
 951                         $profile_link = '';
 952                 }
 953
 954                 if ($sparkle) {
 955                         $status_link = $profile_link . '/status';
 956                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 957                         $profile_link = $profile_link . '/profile';
 958                 }
 959
 960                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 961                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 962                 }
 963
 964                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 965                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 966                 }
 967
 968                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 969
 970                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 971
 972                 if (!$contact['self']) {
 973                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 974                 }
 975
 976                 $follow_link = '';
 977                 $unfollow_link = '';
 978                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 979                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 980                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
 981                         } elseif(!$contact['pending']) {
 982                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
 983                         }
 984                 }
 985
 986                 if (!empty($follow_link) || !empty($unfollow_link)) {
 987                         $contact_drop_link = '';
 988                 }
 989
 990                 /**
 991                  * Menu array:
 992                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 993                  */
 994                 if (empty($contact['uid'])) {
 995                         $menu = [
 996                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
 997                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
 998                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
 999                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1000                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1001                         ];
1002                 } else {
1003                         $menu = [
1004                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1005                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1006                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1007                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1008                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1009                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1010                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1011                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1012                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1013                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1014                         ];
1015
1016                         if (!empty($contact['pending'])) {
1017                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1018                                 if (DBA::isResult($intro)) {
1019                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1020                                 }
1021                         }
1022                 }
1023
1024                 $args = ['contact' => $contact, 'menu' => &$menu];
1025
1026                 Hook::callAll('contact_photo_menu', $args);
1027
1028                 $menucondensed = [];
1029
1030                 foreach ($menu as $menuname => $menuitem) {
1031                         if ($menuitem[1] != '') {
1032                                 $menucondensed[$menuname] = $menuitem;
1033                         }
1034                 }
1035
1036                 return $menucondensed;
1037         }
1038
1039         /**
1040          * Fetch the contact id for a given URL and user
1041          *
1042          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1043          * `addr` or `alias`.
1044          *
1045          * If there's no record and we aren't looking for a public contact, we quit.
1046          * If there's one, we check that it isn't time to update the picture else we
1047          * directly return the found contact id.
1048          *
1049          * Second, we probe the provided $url whether it's http://server.tld/profile or
1050          * nick@server.tld. We quit if we can't get any info back.
1051          *
1052          * Third, we create the contact record if it doesn't exist
1053          *
1054          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1055          * if there's any updates
1056          *
1057          * @param string  $url       Contact URL
1058          * @param integer $uid       The user id for the contact (0 = public contact)
1059          * @param boolean $update    true = always update, false = never update, null = update when not found
1060          * @param array   $default   Default value for creating the contact when everything else fails
1061          *
1062          * @return integer Contact ID
1063          * @throws HTTPException\InternalServerErrorException
1064          * @throws \ImagickException
1065          */
1066         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1067         {
1068                 $contact_id = 0;
1069
1070                 if ($url == '') {
1071                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1072                         return 0;
1073                 }
1074
1075                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1076
1077                 if (!empty($contact)) {
1078                         $contact_id = $contact["id"];
1079
1080                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1081                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1082                                 return $contact_id;
1083                         }
1084                 } elseif ($uid != 0) {
1085                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1086                         return 0;
1087                 } elseif (empty($default) && !is_null($update) && !$update) {
1088                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1089                         return 0;
1090                 }
1091
1092                 $data = [];
1093
1094                 if (empty($default['network']) || $update) {
1095                         $data = Probe::uri($url, "", $uid);
1096
1097                         // Take the default values when probing failed
1098                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1099                                 $data = array_merge($data, $default);
1100                         }
1101                 } elseif (!empty($default['network'])) {
1102                         $data = $default;
1103                 }
1104
1105                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1106                         // Fetch data for the public contact via the first found personal contact
1107                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1108                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1109                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1110                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1111
1112                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1113                         if (!DBA::isResult($personal_contact)) {
1114                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1115                         }
1116
1117                         if (DBA::isResult($personal_contact)) {
1118                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1119                                 $data = $personal_contact;
1120                                 $data['photo'] = $personal_contact['avatar'];
1121                                 $data['account-type'] = $personal_contact['contact-type'];
1122                                 $data['hide'] = $personal_contact['unsearchable'];
1123                                 unset($data['avatar']);
1124                                 unset($data['contact-type']);
1125                                 unset($data['unsearchable']);
1126                         }
1127                 }
1128
1129                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1130                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1131                         return 0;
1132                 }
1133
1134                 if (!$contact_id) {
1135                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1136                         if (!empty($data['alias'])) {
1137                                 $urls[] = Strings::normaliseLink($data['alias']);
1138                         }
1139                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1140                         if (!empty($contact['id'])) {
1141                                 $contact_id = $contact['id'];
1142                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1143                         }
1144                 }
1145
1146                 if (!$contact_id) {
1147                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1148                         $fields = [
1149                                 'uid'       => $uid,
1150                                 'url'       => $data['url'],
1151                                 'nurl'      => Strings::normaliseLink($data['url']),
1152                                 'network'   => $data['network'],
1153                                 'created'   => DateTimeFormat::utcNow(),
1154                                 'rel'       => self::SHARING,
1155                                 'writable'  => 1,
1156                                 'blocked'   => 0,
1157                                 'readonly'  => 0,
1158                                 'pending'   => 0];
1159
1160                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1161
1162                         // Before inserting we do check if the entry does exist now.
1163                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1164                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1165                                 if (DBA::isResult($contact)) {
1166                                         $contact_id = $contact['id'];
1167                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1168                                 } else {
1169                                         DBA::insert('contact', $fields);
1170                                         $contact_id = DBA::lastInsertId();
1171                                         if ($contact_id) {
1172                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1173                                         }
1174                                 }
1175                                 DI::lock()->release(self::LOCK_INSERT);
1176                         } else {
1177                                 Logger::warning('Contact lock had not been acquired');
1178                         }
1179
1180                         if (!$contact_id) {
1181                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1182                                 return 0;
1183                         }
1184                 } else {
1185                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1186                 }
1187
1188                 self::updateFromProbeArray($contact_id, $data);
1189
1190                 // Don't return a number for a deleted account
1191                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1192                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1193                         return 0;
1194                 }
1195
1196                 return $contact_id;
1197         }
1198
1199         /**
1200          * Checks if the contact is archived
1201          *
1202          * @param int $cid contact id
1203          *
1204          * @return boolean Is the contact archived?
1205          * @throws HTTPException\InternalServerErrorException
1206          */
1207         public static function isArchived(int $cid)
1208         {
1209                 if ($cid == 0) {
1210                         return false;
1211                 }
1212
1213                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1214                 if (!DBA::isResult($contact)) {
1215                         return false;
1216                 }
1217
1218                 if ($contact['archive']) {
1219                         return true;
1220                 }
1221
1222                 // Check status of ActivityPub endpoints
1223                 $apcontact = APContact::getByURL($contact['url'], false);
1224                 if (!empty($apcontact)) {
1225                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1226                                 return true;
1227                         }
1228
1229                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1230                                 return true;
1231                         }
1232                 }
1233
1234                 // Check status of Diaspora endpoints
1235                 if (!empty($contact['batch'])) {
1236                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1237                         return DBA::exists('contact', $condition);
1238                 }
1239
1240                 return false;
1241         }
1242
1243         /**
1244          * Checks if the contact is blocked
1245          *
1246          * @param int $cid contact id
1247          *
1248          * @return boolean Is the contact blocked?
1249          * @throws HTTPException\InternalServerErrorException
1250          */
1251         public static function isBlocked($cid)
1252         {
1253                 if ($cid == 0) {
1254                         return false;
1255                 }
1256
1257                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1258                 if (!DBA::isResult($blocked)) {
1259                         return false;
1260                 }
1261
1262                 if (Network::isUrlBlocked($blocked['url'])) {
1263                         return true;
1264                 }
1265
1266                 return (bool) $blocked['blocked'];
1267         }
1268
1269         /**
1270          * Checks if the contact is hidden
1271          *
1272          * @param int $cid contact id
1273          *
1274          * @return boolean Is the contact hidden?
1275          * @throws \Exception
1276          */
1277         public static function isHidden($cid)
1278         {
1279                 if ($cid == 0) {
1280                         return false;
1281                 }
1282
1283                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1284                 if (!DBA::isResult($hidden)) {
1285                         return false;
1286                 }
1287                 return (bool) $hidden['hidden'];
1288         }
1289
1290         /**
1291          * Returns posts from a given contact url
1292          *
1293          * @param string $contact_url Contact URL
1294          * @param bool   $thread_mode
1295          * @param int    $update      Update mode
1296          * @param int    $parent      Item parent ID for the update mode
1297          * @return string posts in HTML
1298          * @throws \Exception
1299          */
1300         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1301         {
1302                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1303         }
1304
1305         /**
1306          * Returns posts from a given contact id
1307          *
1308          * @param int  $cid         Contact ID
1309          * @param bool $thread_mode
1310          * @param int  $update      Update mode
1311          * @param int  $parent     Item parent ID for the update mode
1312          * @return string posts in HTML
1313          * @throws \Exception
1314          */
1315         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1316         {
1317                 $a = DI::app();
1318
1319                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1320                 if (!DBA::isResult($contact)) {
1321                         return '';
1322                 }
1323
1324                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1325                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1326                 } else {
1327                         $sql = "`uid` = ?";
1328                 }
1329
1330                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1331
1332                 if ($thread_mode) {
1333                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1334                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1335                 } else {
1336                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1337                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1338                 }
1339
1340                 if (!empty($parent)) {
1341                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1342                 } else {
1343                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1344                         if (!empty($last_received)) {
1345                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1346                         }
1347                 }
1348
1349                 if (DI::mode()->isMobile()) {
1350                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1351                                 DI::config()->get('system', 'itemspage_network_mobile'));
1352                 } else {
1353                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1354                                 DI::config()->get('system', 'itemspage_network'));
1355                 }
1356
1357                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1358
1359                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1360
1361                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1362                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1363                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1364                 } else {
1365                         $o = '';
1366                 }
1367
1368                 if ($thread_mode) {
1369                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1370
1371                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1372                 } else {
1373                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1374
1375                         $o .= conversation($a, $items, 'contact-posts', $update);
1376                 }
1377
1378                 if (!$update) {
1379                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1380                                 $o .= HTML::scrollLoader();
1381                         } else {
1382                                 $o .= $pager->renderMinimal(count($items));
1383                         }
1384                 }
1385
1386                 return $o;
1387         }
1388
1389         /**
1390          * Returns the account type name
1391          *
1392          * The function can be called with either the user or the contact array
1393          *
1394          * @param array $contact contact or user array
1395          * @return string
1396          */
1397         public static function getAccountType(array $contact)
1398         {
1399                 // There are several fields that indicate that the contact or user is a forum
1400                 // "page-flags" is a field in the user table,
1401                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1402                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1403                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1404                         || (isset($contact['forum']) && intval($contact['forum']))
1405                         || (isset($contact['prv']) && intval($contact['prv']))
1406                         || (isset($contact['community']) && intval($contact['community']))
1407                 ) {
1408                         $type = self::TYPE_COMMUNITY;
1409                 } else {
1410                         $type = self::TYPE_PERSON;
1411                 }
1412
1413                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1414                 if (isset($contact["contact-type"])) {
1415                         $type = $contact["contact-type"];
1416                 }
1417
1418                 if (isset($contact["account-type"])) {
1419                         $type = $contact["account-type"];
1420                 }
1421
1422                 switch ($type) {
1423                         case self::TYPE_ORGANISATION:
1424                                 $account_type = DI::l10n()->t("Organisation");
1425                                 break;
1426
1427                         case self::TYPE_NEWS:
1428                                 $account_type = DI::l10n()->t('News');
1429                                 break;
1430
1431                         case self::TYPE_COMMUNITY:
1432                                 $account_type = DI::l10n()->t("Forum");
1433                                 break;
1434
1435                         default:
1436                                 $account_type = "";
1437                                 break;
1438                 }
1439
1440                 return $account_type;
1441         }
1442
1443         /**
1444          * Blocks a contact
1445          *
1446          * @param int $cid
1447          * @return bool
1448          * @throws \Exception
1449          */
1450         public static function block($cid, $reason = null)
1451         {
1452                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1453
1454                 return $return;
1455         }
1456
1457         /**
1458          * Unblocks a contact
1459          *
1460          * @param int $cid
1461          * @return bool
1462          * @throws \Exception
1463          */
1464         public static function unblock($cid)
1465         {
1466                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1467
1468                 return $return;
1469         }
1470
1471         /**
1472          * Ensure that cached avatar exist
1473          *
1474          * @param integer $cid
1475          */
1476         public static function checkAvatarCache(int $cid)
1477         {
1478                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1479                 if (!DBA::isResult($contact)) {
1480                         return;
1481                 }
1482
1483                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1484                         return;
1485                 }
1486
1487                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1488
1489                 self::updateAvatar($cid, $contact['avatar'], true);
1490         }
1491
1492         /**
1493          * Return the photo path for a given contact array in the given size
1494          *
1495          * @param array $contact    contact array
1496          * @param string $field     Fieldname of the photo in the contact array
1497          * @param string $size      Size of the avatar picture
1498          * @param string $avatar    Avatar path that is displayed when no photo had been found
1499          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1500          * @return string photo path
1501          */
1502         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1503         {
1504                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1505                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1506         }
1507
1508         /**
1509          * Return the photo path for a given contact array
1510          *
1511          * @param array  $contact   Contact array
1512          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1513          * @return string photo path
1514          */
1515         public static function getPhoto(array $contact, bool $no_update = false)
1516         {
1517                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1518         }
1519
1520         /**
1521          * Return the photo path (thumb size) for a given contact array
1522          *
1523          * @param array  $contact   Contact array
1524          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1525          * @return string photo path
1526          */
1527         public static function getThumb(array $contact, bool $no_update = false)
1528         {
1529                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1530         }
1531
1532         /**
1533          * Return the photo path (micro size) for a given contact array
1534          *
1535          * @param array  $contact   Contact array
1536          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1537          * @return string photo path
1538          */
1539         public static function getMicro(array $contact, bool $no_update = false)
1540         {
1541                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1542         }
1543
1544         /**
1545          * Check the given contact array for avatar cache fields
1546          *
1547          * @param array $contact
1548          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1549          * @return array contact array with avatar cache fields
1550          */
1551         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1552         {
1553                 $update = false;
1554                 $contact_fields = [];
1555                 $fields = ['photo', 'thumb', 'micro'];
1556                 foreach ($fields as $field) {
1557                         if (isset($contact[$field])) {
1558                                 $contact_fields[] = $field;
1559                         }
1560                         if (isset($contact[$field]) && empty($contact[$field])) {
1561                                 $update = true;
1562                         }
1563                 }
1564
1565                 if (!$update || $no_update) {
1566                         return $contact;
1567                 }
1568
1569                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1570                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1571
1572                         $new_contact = self::getById($contact['id'], $contact_fields);
1573                         if (DBA::isResult($new_contact)) {
1574                                 // We only update the cache fields
1575                                 $contact = array_merge($contact, $new_contact);
1576                         }
1577                 }
1578
1579                 /// add the default avatars if the fields aren't filled
1580                 if (isset($contact['photo']) && empty($contact['photo'])) {
1581                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1582                 }
1583                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1584                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1585                 }
1586                 if (isset($contact['micro']) && empty($contact['micro'])) {
1587                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1588                 }
1589
1590                 return $contact;
1591         }
1592
1593         /**
1594          * Fetch the default avatar for the given contact and size
1595          *
1596          * @param array $contact  contact array
1597          * @param string $size    Size of the avatar picture
1598          * @return string avatar URL
1599          */
1600         public static function getDefaultAvatar(array $contact, string $size)
1601         {
1602                 switch ($size) {
1603                         case Proxy::SIZE_MICRO:
1604                                 $avatar['size'] = 48;
1605                                 $default = self::DEFAULT_AVATAR_MICRO;
1606                                 break;
1607
1608                         case Proxy::SIZE_THUMB:
1609                                 $avatar['size'] = 80;
1610                                 $default = self::DEFAULT_AVATAR_THUMB;
1611                                 break;
1612
1613                         case Proxy::SIZE_SMALL:
1614                         default:
1615                                 $avatar['size'] = 300;
1616                                 $default = self::DEFAULT_AVATAR_PHOTO;
1617                                 break;
1618                 }
1619
1620                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1621                         return DI::baseUrl() . $default;
1622                 }
1623
1624                 if (!empty($contact['xmpp'])) {
1625                         $avatar['email'] = $contact['xmpp'];
1626                 } elseif (!empty($contact['addr'])) {
1627                         $avatar['email'] = $contact['addr'];
1628                 } elseif (!empty($contact['url'])) {
1629                         $avatar['email'] = $contact['url'];
1630                 } else {
1631                         return DI::baseUrl() . $default;
1632                 }
1633
1634                 $avatar['url'] = '';
1635                 $avatar['success'] = false;
1636
1637                 Hook::callAll('avatar_lookup', $avatar);
1638
1639                 if ($avatar['success'] && !empty($avatar['url'])) {
1640                         return $avatar['url'];
1641                 }
1642
1643                 return DI::baseUrl() . $default;
1644         }
1645
1646         /**
1647          * Get avatar link for given contact id
1648          *
1649          * @param integer $cid     contact id
1650          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1651          * @param string  $updated Contact update date
1652          * @return string avatar link
1653          */
1654         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = ''):string
1655         {
1656                 // We have to fetch the "updated" variable when it wasn't provided
1657                 // The parameter can be provided to improve performance
1658                 if (empty($updated)) {
1659                         $contact = self::getById($cid, ['updated']);
1660                         $updated = $contact['updated'] ?? '';
1661                 }
1662
1663                 $url = DI::baseUrl() . '/photo/contact/';
1664                 switch ($size) {
1665                         case Proxy::SIZE_MICRO:
1666                                 $url .= Proxy::PIXEL_MICRO . '/';
1667                                 break;
1668                         case Proxy::SIZE_THUMB:
1669                                 $url .= Proxy::PIXEL_THUMB . '/';
1670                                 break;
1671                         case Proxy::SIZE_SMALL:
1672                                 $url .= Proxy::PIXEL_SMALL . '/';
1673                                 break;
1674                         case Proxy::SIZE_MEDIUM:
1675                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1676                                 break;
1677                         case Proxy::SIZE_LARGE:
1678                                 $url .= Proxy::PIXEL_LARGE . '/';
1679                                 break;
1680                 }
1681                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1682         }
1683
1684         /**
1685          * Get avatar link for given contact URL
1686          *
1687          * @param string  $url  contact url
1688          * @param integer $uid  user id
1689          * @param string  $size One of the ProxyUtils::SIZE_* constants
1690          * @return string avatar link
1691          */
1692         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1693         {
1694                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1695                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1696                 $contact = self::selectFirst(['id', 'updated'], $condition);
1697                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1698         }
1699
1700         /**
1701          * Get header link for given contact id
1702          *
1703          * @param integer $cid     contact id
1704          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1705          * @param string  $updated Contact update date
1706          * @return string header link
1707          */
1708         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = ''):string
1709         {
1710                 // We have to fetch the "updated" variable when it wasn't provided
1711                 // The parameter can be provided to improve performance
1712                 if (empty($updated)) {
1713                         $contact = self::getById($cid, ['updated']);
1714                         $updated = $contact['updated'] ?? '';
1715                 }
1716
1717                 $url = DI::baseUrl() . '/photo/header/';
1718                 switch ($size) {
1719                         case Proxy::SIZE_MICRO:
1720                                 $url .= Proxy::PIXEL_MICRO . '/';
1721                                 break;
1722                         case Proxy::SIZE_THUMB:
1723                                 $url .= Proxy::PIXEL_THUMB . '/';
1724                                 break;
1725                         case Proxy::SIZE_SMALL:
1726                                 $url .= Proxy::PIXEL_SMALL . '/';
1727                                 break;
1728                         case Proxy::SIZE_MEDIUM:
1729                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1730                                 break;
1731                         case Proxy::SIZE_LARGE:
1732                                 $url .= Proxy::PIXEL_LARGE . '/';
1733                                 break;
1734                 }
1735
1736                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1737         }
1738
1739         /**
1740          * Updates the avatar links in a contact only if needed
1741          *
1742          * @param int    $cid          Contact id
1743          * @param string $avatar       Link to avatar picture
1744          * @param bool   $force        force picture update
1745          * @param bool   $create_cache Enforces the creation of cached avatar fields
1746          *
1747          * @return void
1748          * @throws HTTPException\InternalServerErrorException
1749          * @throws HTTPException\NotFoundException
1750          * @throws \ImagickException
1751          */
1752         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1753         {
1754                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1755                         ['id' => $cid, 'self' => false]);
1756                 if (!DBA::isResult($contact)) {
1757                         return;
1758                 }
1759
1760                 $uid = $contact['uid'];
1761
1762                 // Only update the cached photo links of public contacts when they already are cached
1763                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1764                         if ($contact['avatar'] != $avatar) {
1765                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1766                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1767                         }
1768                         return;
1769                 }
1770
1771                 // User contacts use are updated through the public contacts
1772                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1773                         $pcid = self::getIdForURL($contact['url'], false);
1774                         if (!empty($pcid)) {
1775                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1776                                 self::updateAvatar($pcid, $avatar, $force, true);
1777                                 return;
1778                         }
1779                 }
1780
1781                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1782
1783                 if ($default_avatar) {
1784                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1785                 }
1786
1787                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1788                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1789                                 'photo' => $avatar,
1790                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1791                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1792                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1793                 }
1794
1795                 // Use the data from the self account
1796                 if (empty($fields)) {
1797                         $local_uid = User::getIdForURL($contact['url']);
1798                         if (!empty($local_uid)) {
1799                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1800                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1801                         }
1802                 }
1803
1804                 if (empty($fields)) {
1805                         $update = ($contact['avatar'] != $avatar) || $force;
1806
1807                         if (!$update) {
1808                                 $data = [
1809                                         $contact['photo'] ?? '',
1810                                         $contact['thumb'] ?? '',
1811                                         $contact['micro'] ?? '',
1812                                 ];
1813
1814                                 foreach ($data as $image_uri) {
1815                                         $image_rid = Photo::ridFromURI($image_uri);
1816                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1817                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1818                                                 $update = true;
1819                                         }
1820                                 }
1821                         }
1822
1823                         if ($update) {
1824                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1825                                 if ($photos) {
1826                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1827                                         $update = !empty($fields);
1828                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1829                                 } else {
1830                                         $update = false;
1831                                 }
1832                         }
1833                 } else {
1834                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1835                 }
1836
1837                 if (!$update) {
1838                         return;
1839                 }
1840
1841                 $cids = [];
1842                 $uids = [];
1843                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1844                         // Collect all user contacts of the given public contact
1845                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1846                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1847                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1848                                 $cids[] = $personal_contact['id'];
1849                                 $uids[] = $personal_contact['uid'];
1850                         }
1851                         DBA::close($personal_contacts);
1852
1853                         if (!empty($cids)) {
1854                                 // Delete possibly existing cached user contact avatars
1855                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1856                         }
1857                 }
1858
1859                 $cids[] = $cid;
1860                 $uids[] = $uid;
1861                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1862                 DBA::update('contact', $fields, ['id' => $cids]);
1863         }
1864
1865         public static function deleteContactByUrl(string $url)
1866         {
1867                 // Update contact data for all users
1868                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1869                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1870                 while ($contact = DBA::fetch($contacts)) {
1871                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1872                         self::remove($contact['id']);
1873                 }
1874         }
1875
1876         /**
1877          * Helper function for "updateFromProbe". Updates personal and public contact
1878          *
1879          * @param integer $id      contact id
1880          * @param integer $uid     user id
1881          * @param string  $old_url The previous profile URL of the contact
1882          * @param string  $new_url The profile URL of the contact
1883          * @param array   $fields  The fields that are updated
1884          *
1885          * @throws \Exception
1886          */
1887         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1888         {
1889                 if (Strings::normaliseLink($new_url) != Strings::normaliseLink($old_url)) {
1890                         Logger::notice('New URL differs from old URL', ['old' => $old_url, 'new' => $new_url]);
1891                         return;
1892                 }
1893
1894                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1895                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1896                         return;
1897                 }
1898
1899                 // Search for duplicated contacts and get rid of them
1900                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1901                         return;
1902                 }
1903
1904                 // Archive or unarchive the contact.
1905                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1906                 if (!DBA::isResult($contact)) {
1907                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1908                         return;
1909                 }
1910
1911                 if (isset($fields['failed'])) {
1912                         if ($fields['failed']) {
1913                                 self::markForArchival($contact);
1914                         } else {
1915                                 self::unmarkForArchival($contact);
1916                         }
1917                 }
1918
1919                 if ($contact['uid'] != 0) {
1920                         return;
1921                 }
1922
1923                 // Update contact data for all users
1924                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1925
1926                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1927                 DBA::update('contact', $fields, $condition);
1928
1929                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1930                 $condition['network'] = Protocol::OSTATUS;
1931
1932                 // If the contact failed, propagate the update fields to all contacts
1933                 if (empty($fields['failed'])) {
1934                         unset($fields['last-update']);
1935                         unset($fields['success_update']);
1936                         unset($fields['failure_update']);
1937                 }
1938
1939                 if (empty($fields)) {
1940                         return;
1941                 }
1942
1943                 DBA::update('contact', $fields, $condition);
1944         }
1945
1946         /**
1947          * Remove duplicated contacts
1948          *
1949          * @param string  $nurl  Normalised contact url
1950          * @param integer $uid   User id
1951          * @return boolean
1952          * @throws \Exception
1953          */
1954         public static function removeDuplicates(string $nurl, int $uid)
1955         {
1956                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1957                 $count = DBA::count('contact', $condition);
1958                 if ($count <= 1) {
1959                         return false;
1960                 }
1961
1962                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1963                 if (!DBA::isResult($first_contact)) {
1964                         // Shouldn't happen - so we handle it
1965                         return false;
1966                 }
1967
1968                 $first = $first_contact['id'];
1969                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1970                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1971                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1972                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1973                         return false;
1974                 }
1975
1976                 // Find all duplicates
1977                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1978                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1979                 while ($duplicate = DBA::fetch($duplicates)) {
1980                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1981                                 continue;
1982                         }
1983
1984                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1985                 }
1986                 DBA::close($duplicates);
1987                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
1988                 return true;
1989         }
1990
1991         /**
1992          * @param integer $id      contact id
1993          * @param string  $network Optional network we are probing for
1994          * @return boolean
1995          * @throws HTTPException\InternalServerErrorException
1996          * @throws \ImagickException
1997          */
1998         public static function updateFromProbe(int $id, string $network = '')
1999         {
2000                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2001                 if (!DBA::isResult($contact)) {
2002                         return false;
2003                 }
2004
2005                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2006                 return self::updateFromProbeArray($id, $ret);
2007         }
2008
2009         /**
2010          * @param integer $id      contact id
2011          * @param array   $ret     Probed data
2012          * @return boolean
2013          * @throws HTTPException\InternalServerErrorException
2014          * @throws \ImagickException
2015          */
2016         private static function updateFromProbeArray(int $id, array $ret)
2017         {
2018                 /*
2019                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2020                   This will reliably kill your communication with old Friendica contacts.
2021                  */
2022
2023                 // These fields aren't updated by this routine:
2024                 // 'xmpp', 'sensitive'
2025
2026                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2027                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2028                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
2029                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2030                 if (!DBA::isResult($contact)) {
2031                         return false;
2032                 }
2033
2034                 if (self::isLocal($ret['url'])) {
2035                         if ($contact['uid'] == 0) {
2036                                 Logger::info('Local contacts are not updated here.');
2037                         } else {
2038                                 self::updateFromPublicContact($id, $contact);
2039                         }
2040                         return true;
2041                 }
2042
2043                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2044                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2045                         self::remove($id);
2046
2047                         // Delete all contacts with the same URL
2048                         self::deleteContactByUrl($ret['url']);
2049                         return true;
2050                 }
2051
2052                 $uid = $contact['uid'];
2053                 unset($contact['uid']);
2054
2055                 $uriid = $contact['uri-id'];
2056                 unset($contact['uri-id']);
2057
2058                 $pubkey = $contact['pubkey'];
2059                 unset($contact['pubkey']);
2060
2061                 $contact['photo'] = $contact['avatar'];
2062                 unset($contact['avatar']);
2063
2064                 $updated = DateTimeFormat::utcNow();
2065
2066                 // We must not try to update relay contacts via probe. They are no real contacts.
2067                 // We check after the probing to be able to correct falsely detected contact types.
2068                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2069                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2070                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2071                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2072                         return true;
2073                 }
2074
2075                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2076                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2077                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2078                         return false;
2079                 }
2080
2081                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2082                         $cid = self::getIdForURL($ret['url']);
2083                         if (!empty($cid) && ($cid != $id)) {
2084                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2085                                 return self::updateFromProbeArray($cid, $ret);
2086                         }
2087                 }
2088
2089                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2090                         $ret['unsearchable'] = $ret['hide'];
2091                 }
2092
2093                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2094                         $ret['forum'] = false;
2095                         $ret['prv'] = false;
2096                         $ret['contact-type'] = $ret['account-type'];
2097                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2098                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2099                                 $ret['prv'] = (bool)!$ret['forum'];
2100                         }
2101                 }
2102
2103                 $new_pubkey = $ret['pubkey'] ?? '';
2104
2105                 if ($uid == 0) {
2106                         $ret['last-item'] = Probe::getLastUpdate($ret);
2107                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2108                 }
2109
2110                 $update = false;
2111                 $guid = $ret['guid'] ?? '';
2112
2113                 // make sure to not overwrite existing values with blank entries except some technical fields
2114                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2115                 foreach ($ret as $key => $val) {
2116                         if (!array_key_exists($key, $contact)) {
2117                                 unset($ret[$key]);
2118                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2119                                 $ret[$key] = $contact[$key];
2120                         } elseif ($ret[$key] != $contact[$key]) {
2121                                 $update = true;
2122                         }
2123                 }
2124
2125                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2126                         $update = true;
2127                 } else {
2128                         unset($ret['last-item']);
2129                 }
2130
2131                 if (empty($uriid)) {
2132                         $update = true;
2133                 }
2134
2135                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2136                         self::updateAvatar($id, $ret['photo'], $update);
2137                 }
2138
2139                 if (!$update) {
2140                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2141
2142                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2143                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2144                         }
2145
2146                         // Update the public contact
2147                         if ($uid != 0) {
2148                                 $contact = self::getByURL($ret['url'], false, ['id']);
2149                                 if (!empty($contact['id'])) {
2150                                         self::updateFromProbeArray($contact['id'], $ret);
2151                                 }
2152                         }
2153
2154                         return true;
2155                 }
2156
2157                 if (empty($guid)) {
2158                         $ret['uri-id'] = ItemURI::getIdByURI($ret['url']);
2159                 } else {
2160                         $ret['uri-id'] = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2161                 }
2162
2163                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2164                 $ret['updated'] = $updated;
2165                 $ret['failed']  = false;
2166
2167                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2168                 if (empty($pubkey) && !empty($new_pubkey)) {
2169                         $ret['pubkey'] = $new_pubkey;
2170                 }
2171
2172                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2173                         $ret['uri-date'] = DateTimeFormat::utcNow();
2174                 }
2175
2176                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2177                         $ret['name-date'] = $updated;
2178                 }
2179
2180                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2181                         $ret['last-update'] = $updated;
2182                         $ret['success_update'] = $updated;
2183                 }
2184
2185                 unset($ret['photo']);
2186
2187                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2188
2189                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2190                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2191                 }
2192
2193                 return true;
2194         }
2195
2196         private static function updateFromPublicContact(int $id, array $contact)
2197         {
2198                 $public = self::getByURL($contact['url'], false);
2199
2200                 $fields = [];
2201
2202                 foreach ($contact as $field => $value) {
2203                         if ($field == 'uid') {
2204                                 continue;
2205                         }
2206                         if ($public[$field] != $value) {
2207                                 $fields[$field] = $public[$field];
2208                         }
2209                 }
2210                 if (!empty($fields)) {
2211                         DBA::update('contact', $fields, ['id' => $id, 'self' => false]);
2212                         Logger::info('Updating local contact', ['id' => $id]);
2213                 }
2214         }
2215
2216         /**
2217          * @param integer $url contact url
2218          * @return integer Contact id
2219          * @throws HTTPException\InternalServerErrorException
2220          * @throws \ImagickException
2221          */
2222         public static function updateFromProbeByURL($url)
2223         {
2224                 $id = self::getIdForURL($url);
2225
2226                 if (empty($id)) {
2227                         return $id;
2228                 }
2229
2230                 self::updateFromProbe($id);
2231
2232                 return $id;
2233         }
2234
2235         /**
2236          * Detects if a given contact array belongs to a legacy DFRN connection
2237          *
2238          * @param array $contact
2239          * @return boolean
2240          */
2241         public static function isLegacyDFRNContact($contact)
2242         {
2243                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2244                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2245         }
2246
2247         /**
2248          * Detects the communication protocol for a given contact url.
2249          * This is used to detect Friendica contacts that we can communicate via AP.
2250          *
2251          * @param string $url contact url
2252          * @param string $network Network of that contact
2253          * @return string with protocol
2254          */
2255         public static function getProtocol($url, $network)
2256         {
2257                 if ($network != Protocol::DFRN) {
2258                         return $network;
2259                 }
2260
2261                 $apcontact = APContact::getByURL($url);
2262                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2263                         return Protocol::ACTIVITYPUB;
2264                 } else {
2265                         return $network;
2266                 }
2267         }
2268
2269         /**
2270          * Takes a $uid and a url/handle and adds a new contact
2271          *
2272          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2273          * dfrn_request page.
2274          *
2275          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2276          *
2277          * Returns an array
2278          * $return['success'] boolean true if successful
2279          * $return['message'] error text if success is false.
2280          *
2281          * Takes a $uid and a url/handle and adds a new contact
2282          *
2283          * @param array  $user        The user the contact should be created for
2284          * @param string $url         The profile URL of the contact
2285          * @param bool   $interactive
2286          * @param string $network
2287          * @return array
2288          * @throws HTTPException\InternalServerErrorException
2289          * @throws HTTPException\NotFoundException
2290          * @throws \ImagickException
2291          */
2292         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2293         {
2294                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2295
2296                 // remove ajax junk, e.g. Twitter
2297                 $url = str_replace('/#!/', '/', $url);
2298
2299                 if (!Network::isUrlAllowed($url)) {
2300                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2301                         return $result;
2302                 }
2303
2304                 if (Network::isUrlBlocked($url)) {
2305                         $result['message'] = DI::l10n()->t('Blocked domain');
2306                         return $result;
2307                 }
2308
2309                 if (!$url) {
2310                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2311                         return $result;
2312                 }
2313
2314                 $arr = ['url' => $url, 'contact' => []];
2315
2316                 Hook::callAll('follow', $arr);
2317
2318                 if (empty($arr)) {
2319                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2320                         return $result;
2321                 }
2322
2323                 if (!empty($arr['contact']['name'])) {
2324                         $probed = false;
2325                         $ret = $arr['contact'];
2326                 } else {
2327                         $probed = true;
2328                         $ret = Probe::uri($url, $network, $user['uid']);
2329                 }
2330
2331                 if (($network != '') && ($ret['network'] != $network)) {
2332                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2333                         return $result;
2334                 }
2335
2336                 // check if we already have a contact
2337                 // the poll url is more reliable than the profile url, as we may have
2338                 // indirect links or webfinger links
2339
2340                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2341                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2342                 if (!DBA::isResult($contact)) {
2343                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2344                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2345                 }
2346
2347                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2348
2349                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2350                         if ($interactive) {
2351                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2352                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2353                                 } else {
2354                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2355                                 }
2356
2357                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2358
2359                                 // NOTREACHED
2360                         }
2361                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2362                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2363                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2364                         return $result;
2365                 }
2366
2367                 // This extra param just confuses things, remove it
2368                 if ($protocol === Protocol::DIASPORA) {
2369                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2370                 }
2371
2372                 // do we have enough information?
2373                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2374                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2375                         if (empty($ret['poll'])) {
2376                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2377                         }
2378                         if (empty($ret['name'])) {
2379                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2380                         }
2381                         if (empty($ret['url'])) {
2382                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2383                         }
2384                         if (strpos($ret['url'], '@') !== false) {
2385                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2386                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2387                         }
2388                         return $result;
2389                 }
2390
2391                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2392                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2393                         $ret['notify'] = '';
2394                 }
2395
2396                 if (!$ret['notify']) {
2397                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2398                 }
2399
2400                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2401
2402                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2403
2404                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2405
2406                 $pending = false;
2407                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2408                         $pending = (bool)$ret['manually-approve'];
2409                 }
2410
2411                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2412                         $writeable = 1;
2413                 }
2414
2415                 if (DBA::isResult($contact)) {
2416                         // update contact
2417                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2418
2419                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2420                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2421                 } else {
2422                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2423
2424                         // create contact record
2425                         self::insert([
2426                                 'uid'     => $user['uid'],
2427                                 'created' => DateTimeFormat::utcNow(),
2428                                 'url'     => $ret['url'],
2429                                 'nurl'    => Strings::normaliseLink($ret['url']),
2430                                 'addr'    => $ret['addr'],
2431                                 'alias'   => $ret['alias'],
2432                                 'batch'   => $ret['batch'],
2433                                 'notify'  => $ret['notify'],
2434                                 'poll'    => $ret['poll'],
2435                                 'poco'    => $ret['poco'],
2436                                 'name'    => $ret['name'],
2437                                 'nick'    => $ret['nick'],
2438                                 'network' => $ret['network'],
2439                                 'baseurl' => $ret['baseurl'],
2440                                 'gsid'    => $ret['gsid'] ?? null,
2441                                 'protocol' => $protocol,
2442                                 'pubkey'  => $ret['pubkey'],
2443                                 'rel'     => $new_relation,
2444                                 'priority'=> $ret['priority'],
2445                                 'writable'=> $writeable,
2446                                 'hidden'  => $hidden,
2447                                 'blocked' => 0,
2448                                 'readonly'=> 0,
2449                                 'pending' => $pending,
2450                                 'subhub'  => $subhub
2451                         ]);
2452                 }
2453
2454                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2455                 if (!DBA::isResult($contact)) {
2456                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2457                         return $result;
2458                 }
2459
2460                 $contact_id = $contact['id'];
2461                 $result['cid'] = $contact_id;
2462
2463                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2464
2465                 // Update the avatar
2466                 self::updateAvatar($contact_id, $ret['photo']);
2467
2468                 // pull feed and consume it, which should subscribe to the hub.
2469                 if ($contact['network'] == Protocol::OSTATUS) {
2470                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2471                 }
2472
2473                 if ($probed) {
2474                         self::updateFromProbeArray($contact_id, $ret);
2475                 } else {
2476                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2477                 }
2478
2479                 $owner = User::getOwnerDataById($user['uid']);
2480
2481                 if (DBA::isResult($owner)) {
2482                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2483                                 // create a follow slap
2484                                 $item = [];
2485                                 $item['verb'] = Activity::FOLLOW;
2486                                 $item['gravity'] = GRAVITY_ACTIVITY;
2487                                 $item['follow'] = $contact["url"];
2488                                 $item['body'] = '';
2489                                 $item['title'] = '';
2490                                 $item['guid'] = '';
2491                                 $item['uri-id'] = 0;
2492
2493                                 $slap = OStatus::salmon($item, $owner);
2494
2495                                 if (!empty($contact['notify'])) {
2496                                         Salmon::slapper($owner, $contact['notify'], $slap);
2497                                 }
2498                         } elseif ($protocol == Protocol::DIASPORA) {
2499                                 $ret = Diaspora::sendShare($owner, $contact);
2500                                 Logger::log('share returns: ' . $ret);
2501                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2502                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2503                                 if (empty($activity_id)) {
2504                                         // This really should never happen
2505                                         return false;
2506                                 }
2507
2508                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2509                                 Logger::log('Follow returns: ' . $ret);
2510                         }
2511                 }
2512
2513                 $result['success'] = true;
2514                 return $result;
2515         }
2516
2517         /**
2518          * Updated contact's SSL policy
2519          *
2520          * @param array  $contact    Contact array
2521          * @param string $new_policy New policy, valid: self,full
2522          *
2523          * @return array Contact array with updated values
2524          * @throws \Exception
2525          */
2526         public static function updateSslPolicy(array $contact, $new_policy)
2527         {
2528                 $ssl_changed = false;
2529                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2530                         $ssl_changed = true;
2531                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2532                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2533                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2534                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2535                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2536                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2537                 }
2538
2539                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2540                         $ssl_changed = true;
2541                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2542                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2543                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2544                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2545                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2546                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2547                 }
2548
2549                 if ($ssl_changed) {
2550                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2551                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2552                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2553                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2554                 }
2555
2556                 return $contact;
2557         }
2558
2559         /**
2560          * Follow a contact
2561          *
2562          * @param int $cid Public contact id
2563          * @param int $uid  User ID
2564          *
2565          * @return bool "true" if following had been successful
2566          */
2567         public static function follow(int $cid, int $uid)
2568         {
2569                 $user = User::getById($uid);
2570                 if (empty($user)) {
2571                         return false;
2572                 }
2573
2574                 $contact = self::getById($cid, ['url']);
2575
2576                 $result = self::createFromProbe($user, $contact['url'], false);
2577
2578                 return $result['cid'];
2579         }
2580
2581         /**
2582          * Unfollow a contact
2583          *
2584          * @param int $cid Public contact id
2585          * @param int $uid  User ID
2586          *
2587          * @return bool "true" if unfollowing had been successful
2588          */
2589         public static function unfollow(int $cid, int $uid)
2590         {
2591                 $cdata = self::getPublicAndUserContacID($cid, $uid);
2592                 if (empty($cdata['user'])) {
2593                         return false;
2594                 }
2595
2596                 $contact = self::getById($cdata['user']);
2597
2598                 self::removeSharer([], $contact);
2599
2600                 return true;
2601         }
2602
2603         /**
2604          * @param array  $importer Owner (local user) data
2605          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2606          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2607          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2608          * @param string $note     Introduction additional message
2609          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2610          * @throws HTTPException\InternalServerErrorException
2611          * @throws \ImagickException
2612          */
2613         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2614         {
2615                 // Should always be set
2616                 if (empty($datarray['author-id'])) {
2617                         return false;
2618                 }
2619
2620                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2621                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2622                 if (!DBA::isResult($pub_contact)) {
2623                         // Should never happen
2624                         return false;
2625                 }
2626
2627                 // Contact is blocked at node-level
2628                 if (self::isBlocked($datarray['author-id'])) {
2629                         return false;
2630                 }
2631
2632                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2633                 $name = $pub_contact['name'];
2634                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2635                 $nick = $pub_contact['nick'];
2636                 $network = $pub_contact['network'];
2637
2638                 // Ensure that we don't create a new contact when there already is one
2639                 $cid = self::getIdForURL($url, $importer['uid']);
2640                 if (!empty($cid)) {
2641                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2642                 }
2643
2644                 if (!empty($contact)) {
2645                         if (!empty($contact['pending'])) {
2646                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2647                                 return null;
2648                         }
2649
2650                         // Contact is blocked at user-level
2651                         if (!empty($contact['id']) && !empty($importer['id']) &&
2652                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2653                                 return false;
2654                         }
2655
2656                         // Make sure that the existing contact isn't archived
2657                         self::unmarkForArchival($contact);
2658
2659                         if (($contact['rel'] == self::SHARING)
2660                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2661                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2662                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2663                         }
2664
2665                         // Ensure to always have the correct network type, independent from the connection request method
2666                         self::updateFromProbe($contact['id']);
2667
2668                         Post\UserNotification::insertNotication($contact['id'], Verb::getID(Activity::FOLLOW), $importer['uid']);
2669
2670                         return true;
2671                 } else {
2672                         // send email notification to owner?
2673                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2674                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2675                                 return null;
2676                         }
2677
2678                         // create contact record
2679                         DBA::insert('contact', [
2680                                 'uid'      => $importer['uid'],
2681                                 'created'  => DateTimeFormat::utcNow(),
2682                                 'url'      => $url,
2683                                 'nurl'     => Strings::normaliseLink($url),
2684                                 'name'     => $name,
2685                                 'nick'     => $nick,
2686                                 'network'  => $network,
2687                                 'rel'      => self::FOLLOWER,
2688                                 'blocked'  => 0,
2689                                 'readonly' => 0,
2690                                 'pending'  => 1,
2691                                 'writable' => 1,
2692                         ]);
2693
2694                         $contact_id = DBA::lastInsertId();
2695
2696                         // Ensure to always have the correct network type, independent from the connection request method
2697                         self::updateFromProbe($contact_id);
2698
2699                         self::updateAvatar($contact_id, $photo, true);
2700
2701                         Post\UserNotification::insertNotication($contact_id, Verb::getID(Activity::FOLLOW), $importer['uid']);
2702
2703                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2704
2705                         /// @TODO Encapsulate this into a function/method
2706                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2707                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2708                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2709                                 // create notification
2710                                 $hash = Strings::getRandomHex();
2711
2712                                 if (is_array($contact_record)) {
2713                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2714                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2715                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2716                                 }
2717
2718                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2719
2720                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2721                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2722
2723                                         notification([
2724                                                 'type'  => Notification\Type::INTRO,
2725                                                 'otype' => Notification\ObjectType::INTRO,
2726                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2727                                                 'uid'   => $user['uid'],
2728                                                 'cid'   => $contact_record['id'],
2729                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2730                                         ]);
2731                                 }
2732                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2733                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2734                                         self::createFromProbe($importer, $url, false, $network);
2735                                 }
2736
2737                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2738                                 $fields = ['pending' => false];
2739                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2740                                         $fields['rel'] = self::FRIEND;
2741                                 }
2742
2743                                 DBA::update('contact', $fields, $condition);
2744
2745                                 return true;
2746                         }
2747                 }
2748
2749                 return null;
2750         }
2751
2752         public static function removeFollower($importer, $contact)
2753         {
2754                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2755                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2756                 } else {
2757                         self::remove($contact['id']);
2758                 }
2759         }
2760
2761         public static function removeSharer($importer, $contact)
2762         {
2763                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2764                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2765                 } else {
2766                         self::remove($contact['id']);
2767                 }
2768         }
2769
2770         /**
2771          * Create a birthday event.
2772          *
2773          * Update the year and the birthday.
2774          */
2775         public static function updateBirthdays()
2776         {
2777                 $condition = [
2778                         '`bd` > ?
2779                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2780                         AND NOT `contact`.`pending`
2781                         AND NOT `contact`.`hidden`
2782                         AND NOT `contact`.`blocked`
2783                         AND NOT `contact`.`archive`
2784                         AND NOT `contact`.`deleted`',
2785                         DBA::NULL_DATE,
2786                         self::SHARING,
2787                         self::FRIEND
2788                 ];
2789
2790                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2791
2792                 while ($contact = DBA::fetch($contacts)) {
2793                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2794
2795                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2796
2797                         if (Event::createBirthday($contact, $nextbd)) {
2798                                 // update bdyear
2799                                 DBA::update(
2800                                         'contact',
2801                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2802                                         ['id' => $contact['id']]
2803                                 );
2804                         }
2805                 }
2806                 DBA::close($contacts);
2807         }
2808
2809         /**
2810          * Remove the unavailable contact ids from the provided list
2811          *
2812          * @param array $contact_ids Contact id list
2813          * @return array
2814          * @throws \Exception
2815          */
2816         public static function pruneUnavailable(array $contact_ids)
2817         {
2818                 if (empty($contact_ids)) {
2819                         return [];
2820                 }
2821
2822                 $contacts = self::selectToArray(['id'], [
2823                         'id'      => $contact_ids,
2824                         'blocked' => false,
2825                         'pending' => false,
2826                         'archive' => false,
2827                 ]);
2828
2829                 return array_column($contacts, 'id');
2830         }
2831
2832         /**
2833          * Returns a magic link to authenticate remote visitors
2834          *
2835          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2836          *
2837          * @param string $contact_url The address of the target contact profile
2838          * @param string $url         An url that we will be redirected to after the authentication
2839          *
2840          * @return string with "redir" link
2841          * @throws HTTPException\InternalServerErrorException
2842          * @throws \ImagickException
2843          */
2844         public static function magicLink($contact_url, $url = '')
2845         {
2846                 if (!Session::isAuthenticated()) {
2847                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2848                 }
2849
2850                 $contact = self::getByURL($contact_url, false);
2851                 if (empty($contact)) {
2852                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2853                 }
2854
2855                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2856                 unset($contact['uid']);
2857
2858                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2859         }
2860
2861         /**
2862          * Returns a magic link to authenticate remote visitors
2863          *
2864          * @param integer $cid The contact id of the target contact profile
2865          * @param string  $url An url that we will be redirected to after the authentication
2866          *
2867          * @return string with "redir" link
2868          * @throws HTTPException\InternalServerErrorException
2869          * @throws \ImagickException
2870          */
2871         public static function magicLinkById($cid, $url = '')
2872         {
2873                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2874
2875                 return self::magicLinkByContact($contact, $url);
2876         }
2877
2878         /**
2879          * Returns a magic link to authenticate remote visitors
2880          *
2881          * @param array  $contact The contact array with "uid", "network" and "url"
2882          * @param string $url     An url that we will be redirected to after the authentication
2883          *
2884          * @return string with "redir" link
2885          * @throws HTTPException\InternalServerErrorException
2886          * @throws \ImagickException
2887          */
2888         public static function magicLinkByContact($contact, $url = '')
2889         {
2890                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2891
2892                 if (!Session::isAuthenticated()) {
2893                         return $destination;
2894                 }
2895
2896                 // Only redirections to the same host do make sense
2897                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2898                         return $url;
2899                 }
2900
2901                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2902                         return 'contact/' . $contact['id'] . '/conversations';
2903                 }
2904
2905                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2906                         return $destination;
2907                 }
2908
2909                 if (empty($contact['id'])) {
2910                         return $destination;
2911                 }
2912
2913                 $redirect = 'redir/' . $contact['id'];
2914
2915                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2916                         $redirect .= '?url=' . $url;
2917                 }
2918
2919                 return $redirect;
2920         }
2921
2922         /**
2923          * Is the contact a forum?
2924          *
2925          * @param integer $contactid ID of the contact
2926          *
2927          * @return boolean "true" if it is a forum
2928          */
2929         public static function isForum($contactid)
2930         {
2931                 $fields = ['forum', 'prv'];
2932                 $condition = ['id' => $contactid];
2933                 $contact = DBA::selectFirst('contact', $fields, $condition);
2934                 if (!DBA::isResult($contact)) {
2935                         return false;
2936                 }
2937
2938                 // Is it a forum?
2939                 return ($contact['forum'] || $contact['prv']);
2940         }
2941
2942         /**
2943          * Can the remote contact receive private messages?
2944          *
2945          * @param array $contact
2946          * @return bool
2947          */
2948         public static function canReceivePrivateMessages(array $contact)
2949         {
2950                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2951                 $self = $contact['self'] ?? false;
2952
2953                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2954         }
2955
2956         /**
2957          * Search contact table by nick or name
2958          *
2959          * @param string $search Name or nick
2960          * @param string $mode   Search mode (e.g. "community")
2961          * @param int    $uid    User ID
2962          *
2963          * @return array with search results
2964          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2965          */
2966         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2967         {
2968                 if (empty($search)) {
2969                         return [];
2970                 }
2971
2972                 // check supported networks
2973                 if (DI::config()->get('system', 'diaspora_enabled')) {
2974                         $diaspora = Protocol::DIASPORA;
2975                 } else {
2976                         $diaspora = Protocol::DFRN;
2977                 }
2978
2979                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2980                         $ostatus = Protocol::OSTATUS;
2981                 } else {
2982                         $ostatus = Protocol::DFRN;
2983                 }
2984
2985                 // check if we search only communities or every contact
2986                 if ($mode === 'community') {
2987                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
2988                 } else {
2989                         $extra_sql = '';
2990                 }
2991
2992                 $search .= '%';
2993
2994                 $results = DBA::p("SELECT * FROM `contact`
2995                         WHERE (NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` where `publish` OR `net-publish`))
2996                                 AND `network` IN (?, ?, ?, ?) AND
2997                                 NOT `failed` AND `uid` = ? AND
2998                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2999                                 ORDER BY `nurl` DESC LIMIT 1000",
3000                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $uid, $search, $search, $search
3001                 );
3002
3003                 $contacts = DBA::toArray($results);
3004                 return $contacts;
3005         }
3006
3007         /**
3008          * Add public contacts from an array
3009          *
3010          * @param array $urls
3011          * @return array result "count", "added" and "updated"
3012          */
3013         public static function addByUrls(array $urls)
3014         {
3015                 $added = 0;
3016                 $updated = 0;
3017                 $unchanged = 0;
3018                 $count = 0;
3019
3020                 foreach ($urls as $url) {
3021                         if (empty($url) || !is_string($url)) {
3022                                 continue;
3023                         }
3024                         $contact = self::getByURL($url, false, ['id', 'updated']);
3025                         if (empty($contact['id'])) {
3026                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3027                                 ++$added;
3028                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3029                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3030                                 ++$updated;
3031                         } else {
3032                                 ++$unchanged;
3033                         }
3034                         ++$count;
3035                 }
3036
3037                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3038         }
3039
3040         /**
3041          * Returns a random, global contact array of the current node
3042          *
3043          * @return array The profile array
3044          * @throws Exception
3045          */
3046         public static function getRandomContact()
3047         {
3048                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3049                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3050                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3051                 ], ['order' => ['RAND()']]);
3052
3053                 if (DBA::isResult($contact)) {
3054                         return $contact;
3055                 }
3056
3057                 return [];
3058         }
3059 }