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                 if (empty($fields['created'])) {
 189                         $fields['created'] = DateTimeFormat::utcNow();
 190                 }
 191
 192                 $ret = DBA::insert('contact', $fields, $duplicate_mode);
 193                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 194                 if (!DBA::isResult($contact)) {
 195                         // Shouldn't happen
 196                         return $ret;
 197                 }
 198
 199                 // Search for duplicated contacts and get rid of them
 200                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 201
 202                 return $ret;
 203         }
 204
 205         /**
 206          * @param integer $id     Contact ID
 207          * @param array   $fields Array of selected fields, empty for all
 208          * @return array|boolean Contact record if it exists, false otherwise
 209          * @throws \Exception
 210          */
 211         public static function getById($id, $fields = [])
 212         {
 213                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 214         }
 215
 216         /**
 217          * Fetches a contact by a given url
 218          *
 219          * @param string  $url    profile url
 220          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 221          * @param array   $fields Field list
 222          * @param integer $uid    User ID of the contact
 223          * @return array contact array
 224          */
 225         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 226         {
 227                 if ($update || is_null($update)) {
 228                         $cid = self::getIdForURL($url, $uid, $update);
 229                         if (empty($cid)) {
 230                                 return [];
 231                         }
 232
 233                         $contact = self::getById($cid, $fields);
 234                         if (empty($contact)) {
 235                                 return [];
 236                         }
 237                         return $contact;
 238                 }
 239
 240                 // Add internal fields
 241                 $removal = [];
 242                 if (!empty($fields)) {
 243                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 244                                 if (!in_array($internal, $fields)) {
 245                                         $fields[] = $internal;
 246                                         $removal[] = $internal;
 247                                 }
 248                         }
 249                 }
 250
 251                 // We first try the nurl (http://server.tld/nick), most common case
 252                 $options = ['order' => ['id']];
 253                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 254
 255                 // Then the addr (nick@server.tld)
 256                 if (!DBA::isResult($contact)) {
 257                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 258                 }
 259
 260                 // Then the alias (which could be anything)
 261                 if (!DBA::isResult($contact)) {
 262                         // The link could be provided as http although we stored it as https
 263                         $ssl_url = str_replace('http://', 'https://', $url);
 264                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 265                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 266                 }
 267
 268                 if (!DBA::isResult($contact)) {
 269                         return [];
 270                 }
 271
 272                 // Update the contact in the background if needed
 273                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 274                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 275                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 276                 }
 277
 278                 // Remove the internal fields
 279                 foreach ($removal as $internal) {
 280                         unset($contact[$internal]);
 281                 }
 282
 283                 return $contact;
 284         }
 285
 286         /**
 287          * Fetches a contact for a given user by a given url.
 288          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 289          *
 290          * @param string  $url    profile url
 291          * @param integer $uid    User ID of the contact
 292          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 293          * @param array   $fields Field list
 294          * @return array contact array
 295          */
 296         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 297         {
 298                 if ($uid != 0) {
 299                         $contact = self::getByURL($url, $update, $fields, $uid);
 300                         if (!empty($contact)) {
 301                                 if (!empty($contact['id'])) {
 302                                         $contact['cid'] = $contact['id'];
 303                                         $contact['zid'] = 0;
 304                                 }
 305                                 return $contact;
 306                         }
 307                 }
 308
 309                 $contact = self::getByURL($url, $update, $fields);
 310                 if (!empty($contact['id'])) {
 311                         $contact['cid'] = 0;
 312                         $contact['zid'] = $contact['id'];
 313                 }
 314                 return $contact;
 315         }
 316
 317         /**
 318          * Tests if the given contact is a follower
 319          *
 320          * @param int $cid Either public contact id or user's contact id
 321          * @param int $uid User ID
 322          *
 323          * @return boolean is the contact id a follower?
 324          * @throws HTTPException\InternalServerErrorException
 325          * @throws \ImagickException
 326          */
 327         public static function isFollower($cid, $uid)
 328         {
 329                 if (Contact\User::isBlocked($cid, $uid)) {
 330                         return false;
 331                 }
 332
 333                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 334                 if (empty($cdata['user'])) {
 335                         return false;
 336                 }
 337
 338                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 339                 return DBA::exists('contact', $condition);
 340         }
 341
 342         /**
 343          * Tests if the given contact url is a follower
 344          *
 345          * @param string $url Contact URL
 346          * @param int    $uid User ID
 347          *
 348          * @return boolean is the contact id a follower?
 349          * @throws HTTPException\InternalServerErrorException
 350          * @throws \ImagickException
 351          */
 352         public static function isFollowerByURL($url, $uid)
 353         {
 354                 $cid = self::getIdForURL($url, $uid);
 355
 356                 if (empty($cid)) {
 357                         return false;
 358                 }
 359
 360                 return self::isFollower($cid, $uid);
 361         }
 362
 363         /**
 364          * Tests if the given user follow the given contact
 365          *
 366          * @param int $cid Either public contact id or user's contact id
 367          * @param int $uid User ID
 368          *
 369          * @return boolean is the contact url being followed?
 370          * @throws HTTPException\InternalServerErrorException
 371          * @throws \ImagickException
 372          */
 373         public static function isSharing($cid, $uid)
 374         {
 375                 if (Contact\User::isBlocked($cid, $uid)) {
 376                         return false;
 377                 }
 378
 379                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 380                 if (empty($cdata['user'])) {
 381                         return false;
 382                 }
 383
 384                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 385                 return DBA::exists('contact', $condition);
 386         }
 387
 388         /**
 389          * Tests if the given user follow the given contact url
 390          *
 391          * @param string $url Contact URL
 392          * @param int    $uid User ID
 393          *
 394          * @return boolean is the contact url being followed?
 395          * @throws HTTPException\InternalServerErrorException
 396          * @throws \ImagickException
 397          */
 398         public static function isSharingByURL($url, $uid)
 399         {
 400                 $cid = self::getIdForURL($url, $uid);
 401
 402                 if (empty($cid)) {
 403                         return false;
 404                 }
 405
 406                 return self::isSharing($cid, $uid);
 407         }
 408
 409         /**
 410          * Get the basepath for a given contact link
 411          *
 412          * @param string $url The contact link
 413          * @param boolean $dont_update Don't update the contact
 414          *
 415          * @return string basepath
 416          * @throws HTTPException\InternalServerErrorException
 417          * @throws \ImagickException
 418          */
 419         public static function getBasepath($url, $dont_update = false)
 420         {
 421                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 422                 if (!DBA::isResult($contact)) {
 423                         return '';
 424                 }
 425
 426                 if (!empty($contact['baseurl'])) {
 427                         return $contact['baseurl'];
 428                 } elseif ($dont_update) {
 429                         return '';
 430                 }
 431
 432                 // Update the existing contact
 433                 self::updateFromProbe($contact['id']);
 434
 435                 // And fetch the result
 436                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 437                 if (empty($contact['baseurl'])) {
 438                         Logger::info('No baseurl for contact', ['url' => $url]);
 439                         return '';
 440                 }
 441
 442                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 443                 return $contact['baseurl'];
 444         }
 445
 446         /**
 447          * Check if the given contact url is on the same server
 448          *
 449          * @param string $url The contact link
 450          *
 451          * @return boolean Is it the same server?
 452          */
 453         public static function isLocal($url)
 454         {
 455                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 456         }
 457
 458         /**
 459          * Check if the given contact ID is on the same server
 460          *
 461          * @param string $url The contact link
 462          *
 463          * @return boolean Is it the same server?
 464          */
 465         public static function isLocalById(int $cid)
 466         {
 467                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 468                 if (!DBA::isResult($contact)) {
 469                         return false;
 470                 }
 471
 472                 if (empty($contact['baseurl'])) {
 473                         $baseurl = self::getBasepath($contact['url'], true);
 474                 } else {
 475                         $baseurl = $contact['baseurl'];
 476                 }
 477
 478                 return Strings::compareLink($baseurl, DI::baseUrl());
 479         }
 480
 481         /**
 482          * Returns the public contact id of the given user id
 483          *
 484          * @param  integer $uid User ID
 485          *
 486          * @return integer|boolean Public contact id for given user id
 487          * @throws \Exception
 488          */
 489         public static function getPublicIdByUserId($uid)
 490         {
 491                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 492                 if (!DBA::isResult($self)) {
 493                         return false;
 494                 }
 495                 return self::getIdForURL($self['url']);
 496         }
 497
 498         /**
 499          * Returns the contact id for the user and the public contact id for a given contact id
 500          *
 501          * @param int $cid Either public contact id or user's contact id
 502          * @param int $uid User ID
 503          *
 504          * @return array with public and user's contact id
 505          * @throws HTTPException\InternalServerErrorException
 506          * @throws \ImagickException
 507          */
 508         public static function getPublicAndUserContacID($cid, $uid)
 509         {
 510                 if (empty($uid) || empty($cid)) {
 511                         return [];
 512                 }
 513
 514                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 515                 if (!DBA::isResult($contact)) {
 516                         return [];
 517                 }
 518
 519                 // We quit when the user id don't match the user id of the provided contact
 520                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 521                         return [];
 522                 }
 523
 524                 if ($contact['uid'] != 0) {
 525                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 526                         if (empty($pcid)) {
 527                                 return [];
 528                         }
 529                         $ucid = $contact['id'];
 530                 } else {
 531                         $pcid = $contact['id'];
 532                         $ucid = self::getIdForURL($contact['url'], $uid);
 533                 }
 534
 535                 return ['public' => $pcid, 'user' => $ucid];
 536         }
 537
 538         /**
 539          * Returns contact details for a given contact id in combination with a user id
 540          *
 541          * @param int $cid A contact ID
 542          * @param int $uid The User ID
 543          * @param array $fields The selected fields for the contact
 544          *
 545          * @return array The contact details
 546          *
 547          * @throws \Exception
 548          */
 549         public static function getContactForUser($cid, $uid, array $fields = [])
 550         {
 551                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 552
 553                 if (!DBA::isResult($contact)) {
 554                         return [];
 555                 } else {
 556                         return $contact;
 557                 }
 558         }
 559
 560         /**
 561          * Creates the self-contact for the provided user id
 562          *
 563          * @param int $uid
 564          * @return bool Operation success
 565          * @throws HTTPException\InternalServerErrorException
 566          */
 567         public static function createSelfFromUserId($uid)
 568         {
 569                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 570                         ['uid' => $uid, 'account_expired' => false]);
 571                 if (!DBA::isResult($user)) {
 572                         return false;
 573                 }
 574
 575                 $contact = [
 576                         'uid'         => $user['uid'],
 577                         'created'     => DateTimeFormat::utcNow(),
 578                         'self'        => 1,
 579                         'name'        => $user['username'],
 580                         'nick'        => $user['nickname'],
 581                         'pubkey'      => $user['pubkey'],
 582                         'prvkey'      => $user['prvkey'],
 583                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 584                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 585                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 586                         'blocked'     => 0,
 587                         'pending'     => 0,
 588                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 589                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 590                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 591                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 592                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 593                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 594                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 595                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 596                         'name-date'   => DateTimeFormat::utcNow(),
 597                         'uri-date'    => DateTimeFormat::utcNow(),
 598                         'avatar-date' => DateTimeFormat::utcNow(),
 599                         'closeness'   => 0
 600                 ];
 601
 602                 $return = true;
 603
 604                 // Only create the entry if it doesn't exist yet
 605                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 606                         $return = DBA::insert('contact', $contact);
 607                 }
 608
 609                 // Create the public contact
 610                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 611                         $contact['self']   = false;
 612                         $contact['uid']    = 0;
 613                         $contact['prvkey'] = null;
 614
 615                         DBA::insert('contact', $contact, Database::INSERT_IGNORE);
 616                 }
 617
 618                 return $return;
 619         }
 620
 621         /**
 622          * Updates the self-contact for the provided user id
 623          *
 624          * @param int     $uid
 625          * @param boolean $update_avatar Force the avatar update
 626          * @return bool   "true" if updated
 627          * @throws HTTPException\InternalServerErrorException
 628          */
 629         public static function updateSelfFromUserID($uid, $update_avatar = false)
 630         {
 631                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 632                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 633                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 634                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 635                 if (!DBA::isResult($self)) {
 636                         return false;
 637                 }
 638
 639                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 640                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 641                 if (!DBA::isResult($user)) {
 642                         return false;
 643                 }
 644
 645                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 646                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 647                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 648                 if (!DBA::isResult($profile)) {
 649                         return false;
 650                 }
 651
 652                 $file_suffix = 'jpg';
 653
 654                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 655                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 656                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 657                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 658                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'network' => Protocol::DFRN];
 659
 660                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 661                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 662                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 663                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 664                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 665                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 666                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 667                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 668                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 669
 670                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 671                 if (DBA::isResult($avatar)) {
 672                         if ($update_avatar) {
 673                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 674                         }
 675
 676                         // Creating the path to the avatar, beginning with the file suffix
 677                         $types = Images::supportedTypes();
 678                         if (isset($types[$avatar['type']])) {
 679                                 $file_suffix = $types[$avatar['type']];
 680                         }
 681
 682                         // We are adding a timestamp value so that other systems won't use cached content
 683                         $timestamp = strtotime($fields['avatar-date']);
 684
 685                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 686                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 687
 688                         $fields['photo'] = $prefix . '4' . $suffix;
 689                         $fields['thumb'] = $prefix . '5' . $suffix;
 690                         $fields['micro'] = $prefix . '6' . $suffix;
 691                 } else {
 692                         // We hadn't found a photo entry, so we use the default avatar
 693                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 694                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 695                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 696                 }
 697
 698                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 699                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 700                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 701                 $fields['unsearchable'] = !$profile['net-publish'];
 702
 703                 $update = false;
 704
 705                 foreach ($fields as $field => $content) {
 706                         if ($self[$field] != $content) {
 707                                 $update = true;
 708                         }
 709                 }
 710
 711                 if ($update) {
 712                         if ($fields['name'] != $self['name']) {
 713                                 $fields['name-date'] = DateTimeFormat::utcNow();
 714                         }
 715                         $fields['updated'] = DateTimeFormat::utcNow();
 716                         DBA::update('contact', $fields, ['id' => $self['id']]);
 717
 718                         // Update the public contact as well
 719                         $fields['prvkey'] = null;
 720                         $fields['self']   = false;
 721                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 722
 723                         // Update the profile
 724                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 725                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 726                         DBA::update('profile', $fields, ['uid' => $uid]);
 727                 }
 728
 729                 return $update;
 730         }
 731
 732         /**
 733          * Marks a contact for removal
 734          *
 735          * @param int $id contact id
 736          * @return null
 737          * @throws HTTPException\InternalServerErrorException
 738          */
 739         public static function remove($id)
 740         {
 741                 // We want just to make sure that we don't delete our "self" contact
 742                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 743                 if (!DBA::isResult($contact)) {
 744                         return;
 745                 }
 746
 747                 // Archive the contact
 748                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 749
 750                 // Delete it in the background
 751                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 752         }
 753
 754         /**
 755          * Sends an unfriend message. Does not remove the contact
 756          *
 757          * @param array   $user     User unfriending
 758          * @param array   $contact  Contact unfriended
 759          * @param boolean $dissolve Remove the contact on the remote side
 760          * @return void
 761          * @throws HTTPException\InternalServerErrorException
 762          * @throws \ImagickException
 763          */
 764         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 765         {
 766                 if (empty($contact['network'])) {
 767                         return;
 768                 }
 769
 770                 $protocol = $contact['network'];
 771                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 772                         $protocol = Protocol::ACTIVITYPUB;
 773                 }
 774
 775                 if (($protocol == Protocol::DFRN) && $dissolve) {
 776                         DFRN::deliver($user, $contact, 'placeholder', true);
 777                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 778                         // create an unfollow slap
 779                         $item = [];
 780                         $item['verb'] = Activity::O_UNFOLLOW;
 781                         $item['gravity'] = GRAVITY_ACTIVITY;
 782                         $item['follow'] = $contact["url"];
 783                         $item['body'] = '';
 784                         $item['title'] = '';
 785                         $item['guid'] = '';
 786                         $item['uri-id'] = 0;
 787                         $slap = OStatus::salmon($item, $user);
 788
 789                         if (!empty($contact['notify'])) {
 790                                 Salmon::slapper($user, $contact['notify'], $slap);
 791                         }
 792                 } elseif ($protocol == Protocol::DIASPORA) {
 793                         Diaspora::sendUnshare($user, $contact);
 794                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 795                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 796
 797                         if ($dissolve) {
 798                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 799                         }
 800                 }
 801         }
 802
 803         /**
 804          * Marks a contact for archival after a communication issue delay
 805          *
 806          * Contact has refused to recognise us as a friend. We will start a countdown.
 807          * If they still don't recognise us in 32 days, the relationship is over,
 808          * and we won't waste any more time trying to communicate with them.
 809          * This provides for the possibility that their database is temporarily messed
 810          * up or some other transient event and that there's a possibility we could recover from it.
 811          *
 812          * @param array $contact contact to mark for archival
 813          * @return null
 814          * @throws HTTPException\InternalServerErrorException
 815          */
 816         public static function markForArchival(array $contact)
 817         {
 818                 if (!isset($contact['url']) && !empty($contact['id'])) {
 819                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 820                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 821                         if (!DBA::isResult($contact)) {
 822                                 return;
 823                         }
 824                 } elseif (!isset($contact['url'])) {
 825                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 826                 }
 827
 828                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 829
 830                 // Contact already archived or "self" contact? => nothing to do
 831                 if ($contact['archive'] || $contact['self']) {
 832                         return;
 833                 }
 834
 835                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 836                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 837                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 838                 } else {
 839                         /* @todo
 840                          * We really should send a notification to the owner after 2-3 weeks
 841                          * so they won't be surprised when the contact vanishes and can take
 842                          * remedial action if this was a serious mistake or glitch
 843                          */
 844
 845                         /// @todo Check for contact vitality via probing
 846                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 847
 848                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 849                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 850                                 /* Relationship is really truly dead. archive them rather than
 851                                  * delete, though if the owner tries to unarchive them we'll start
 852                                  * the whole process over again.
 853                                  */
 854                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 855                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 856                         }
 857                 }
 858         }
 859
 860         /**
 861          * Cancels the archival countdown
 862          *
 863          * @see   Contact::markForArchival()
 864          *
 865          * @param array $contact contact to be unmarked for archival
 866          * @return null
 867          * @throws \Exception
 868          */
 869         public static function unmarkForArchival(array $contact)
 870         {
 871                 // Always unarchive the relay contact entry
 872                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 873                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 874                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 875                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 876                                 DBA::update('contact', $fields, $condition);
 877                         }
 878                 }
 879
 880                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 881                 $exists = DBA::exists('contact', $condition);
 882
 883                 // We don't need to update, we never marked this contact for archival
 884                 if (!$exists) {
 885                         return;
 886                 }
 887
 888                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 889
 890                 if (!isset($contact['url']) && !empty($contact['id'])) {
 891                         $fields = ['id', 'url', 'batch'];
 892                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 893                         if (!DBA::isResult($contact)) {
 894                                 return;
 895                         }
 896                 }
 897
 898                 // It's a miracle. Our dead contact has inexplicably come back to life.
 899                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 900                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 901                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 902         }
 903
 904         /**
 905          * Returns the data array for the photo menu of a given contact
 906          *
 907          * @param array $contact contact
 908          * @param int   $uid     optional, default 0
 909          * @return array
 910          * @throws HTTPException\InternalServerErrorException
 911          * @throws \ImagickException
 912          */
 913         public static function photoMenu(array $contact, $uid = 0)
 914         {
 915                 $pm_url = '';
 916                 $status_link = '';
 917                 $photos_link = '';
 918                 $contact_drop_link = '';
 919                 $poke_link = '';
 920
 921                 if ($uid == 0) {
 922                         $uid = local_user();
 923                 }
 924
 925                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 926                         if ($uid == 0) {
 927                                 $profile_link = self::magicLinkByContact($contact);
 928                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 929
 930                                 return $menu;
 931                         }
 932
 933                         // Look for our own contact if the uid doesn't match and isn't public
 934                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 935                         if (DBA::isResult($contact_own)) {
 936                                 return self::photoMenu($contact_own, $uid);
 937                         }
 938                 }
 939
 940                 $sparkle = false;
 941                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 942                         $sparkle = true;
 943                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 944                 } else {
 945                         $profile_link = $contact['url'];
 946                 }
 947
 948                 if ($profile_link === 'mailbox') {
 949                         $profile_link = '';
 950                 }
 951
 952                 if ($sparkle) {
 953                         $status_link = $profile_link . '/status';
 954                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 955                         $profile_link = $profile_link . '/profile';
 956                 }
 957
 958                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 959                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 960                 }
 961
 962                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 963                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 964                 }
 965
 966                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 967
 968                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 969
 970                 if (!$contact['self']) {
 971                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 972                 }
 973
 974                 $follow_link = '';
 975                 $unfollow_link = '';
 976                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 977                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 978                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
 979                         } elseif(!$contact['pending']) {
 980                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
 981                         }
 982                 }
 983
 984                 if (!empty($follow_link) || !empty($unfollow_link)) {
 985                         $contact_drop_link = '';
 986                 }
 987
 988                 /**
 989                  * Menu array:
 990                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 991                  */
 992                 if (empty($contact['uid'])) {
 993                         $menu = [
 994                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
 995                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
 996                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
 997                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
 998                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
 999                         ];
1000                 } else {
1001                         $menu = [
1002                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1003                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1004                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1005                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1006                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1007                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1008                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1009                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1010                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1011                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1012                         ];
1013
1014                         if (!empty($contact['pending'])) {
1015                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1016                                 if (DBA::isResult($intro)) {
1017                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1018                                 }
1019                         }
1020                 }
1021
1022                 $args = ['contact' => $contact, 'menu' => &$menu];
1023
1024                 Hook::callAll('contact_photo_menu', $args);
1025
1026                 $menucondensed = [];
1027
1028                 foreach ($menu as $menuname => $menuitem) {
1029                         if ($menuitem[1] != '') {
1030                                 $menucondensed[$menuname] = $menuitem;
1031                         }
1032                 }
1033
1034                 return $menucondensed;
1035         }
1036
1037         /**
1038          * Fetch the contact id for a given URL and user
1039          *
1040          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1041          * `addr` or `alias`.
1042          *
1043          * If there's no record and we aren't looking for a public contact, we quit.
1044          * If there's one, we check that it isn't time to update the picture else we
1045          * directly return the found contact id.
1046          *
1047          * Second, we probe the provided $url whether it's http://server.tld/profile or
1048          * nick@server.tld. We quit if we can't get any info back.
1049          *
1050          * Third, we create the contact record if it doesn't exist
1051          *
1052          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1053          * if there's any updates
1054          *
1055          * @param string  $url       Contact URL
1056          * @param integer $uid       The user id for the contact (0 = public contact)
1057          * @param boolean $update    true = always update, false = never update, null = update when not found
1058          * @param array   $default   Default value for creating the contact when everything else fails
1059          *
1060          * @return integer Contact ID
1061          * @throws HTTPException\InternalServerErrorException
1062          * @throws \ImagickException
1063          */
1064         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1065         {
1066                 $contact_id = 0;
1067
1068                 if ($url == '') {
1069                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1070                         return 0;
1071                 }
1072
1073                 $contact = self::getByURL($url, false, ['id', 'network'], $uid);
1074
1075                 if (!empty($contact)) {
1076                         $contact_id = $contact["id"];
1077
1078                         if (empty($update)) {
1079                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1080                                 return $contact_id;
1081                         }
1082                 } elseif ($uid != 0) {
1083                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1084                         return 0;
1085                 } elseif (empty($default) && !is_null($update) && !$update) {
1086                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1087                         return 0;
1088                 }
1089
1090                 $data = [];
1091
1092                 if (empty($default['network']) || $update) {
1093                         $data = Probe::uri($url, "", $uid);
1094
1095                         // Take the default values when probing failed
1096                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1097                                 $data = array_merge($data, $default);
1098                         }
1099                 } elseif (!empty($default['network'])) {
1100                         $data = $default;
1101                 }
1102
1103                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1104                         // Fetch data for the public contact via the first found personal contact
1105                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1106                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1107                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1108                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1109
1110                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1111                         if (!DBA::isResult($personal_contact)) {
1112                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1113                         }
1114
1115                         if (DBA::isResult($personal_contact)) {
1116                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1117                                 $data = $personal_contact;
1118                                 $data['photo'] = $personal_contact['avatar'];
1119                                 $data['account-type'] = $personal_contact['contact-type'];
1120                                 $data['hide'] = $personal_contact['unsearchable'];
1121                                 unset($data['avatar']);
1122                                 unset($data['contact-type']);
1123                                 unset($data['unsearchable']);
1124                         }
1125                 }
1126
1127                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1128                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1129                         return 0;
1130                 }
1131
1132                 if (!$contact_id) {
1133                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1134                         if (!empty($data['alias'])) {
1135                                 $urls[] = Strings::normaliseLink($data['alias']);
1136                         }
1137                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1138                         if (!empty($contact['id'])) {
1139                                 $contact_id = $contact['id'];
1140                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1141                         }
1142                 }
1143
1144                 if (!$contact_id) {
1145                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1146                         $fields = [
1147                                 'uid'       => $uid,
1148                                 'url'       => $data['url'],
1149                                 'nurl'      => Strings::normaliseLink($data['url']),
1150                                 'network'   => $data['network'],
1151                                 'created'   => DateTimeFormat::utcNow(),
1152                                 'rel'       => self::SHARING,
1153                                 'writable'  => 1,
1154                                 'blocked'   => 0,
1155                                 'readonly'  => 0,
1156                                 'pending'   => 0];
1157
1158                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1159
1160                         // Before inserting we do check if the entry does exist now.
1161                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1162                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1163                                 if (DBA::isResult($contact)) {
1164                                         $contact_id = $contact['id'];
1165                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1166                                 } else {
1167                                         DBA::insert('contact', $fields);
1168                                         $contact_id = DBA::lastInsertId();
1169                                         if ($contact_id) {
1170                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1171                                         }
1172                                 }
1173                                 DI::lock()->release(self::LOCK_INSERT);
1174                         } else {
1175                                 Logger::warning('Contact lock had not been acquired');
1176                         }
1177
1178                         if (!$contact_id) {
1179                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1180                                 return 0;
1181                         }
1182                 } else {
1183                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1184                 }
1185
1186                 self::updateFromProbeArray($contact_id, $data);
1187
1188                 // Don't return a number for a deleted account
1189                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1190                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1191                         return 0;
1192                 }
1193
1194                 return $contact_id;
1195         }
1196
1197         /**
1198          * Checks if the contact is archived
1199          *
1200          * @param int $cid contact id
1201          *
1202          * @return boolean Is the contact archived?
1203          * @throws HTTPException\InternalServerErrorException
1204          */
1205         public static function isArchived(int $cid)
1206         {
1207                 if ($cid == 0) {
1208                         return false;
1209                 }
1210
1211                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1212                 if (!DBA::isResult($contact)) {
1213                         return false;
1214                 }
1215
1216                 if ($contact['archive']) {
1217                         return true;
1218                 }
1219
1220                 // Check status of ActivityPub endpoints
1221                 $apcontact = APContact::getByURL($contact['url'], false);
1222                 if (!empty($apcontact)) {
1223                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1224                                 return true;
1225                         }
1226
1227                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1228                                 return true;
1229                         }
1230                 }
1231
1232                 // Check status of Diaspora endpoints
1233                 if (!empty($contact['batch'])) {
1234                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1235                         return DBA::exists('contact', $condition);
1236                 }
1237
1238                 return false;
1239         }
1240
1241         /**
1242          * Checks if the contact is blocked
1243          *
1244          * @param int $cid contact id
1245          *
1246          * @return boolean Is the contact blocked?
1247          * @throws HTTPException\InternalServerErrorException
1248          */
1249         public static function isBlocked($cid)
1250         {
1251                 if ($cid == 0) {
1252                         return false;
1253                 }
1254
1255                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1256                 if (!DBA::isResult($blocked)) {
1257                         return false;
1258                 }
1259
1260                 if (Network::isUrlBlocked($blocked['url'])) {
1261                         return true;
1262                 }
1263
1264                 return (bool) $blocked['blocked'];
1265         }
1266
1267         /**
1268          * Checks if the contact is hidden
1269          *
1270          * @param int $cid contact id
1271          *
1272          * @return boolean Is the contact hidden?
1273          * @throws \Exception
1274          */
1275         public static function isHidden($cid)
1276         {
1277                 if ($cid == 0) {
1278                         return false;
1279                 }
1280
1281                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1282                 if (!DBA::isResult($hidden)) {
1283                         return false;
1284                 }
1285                 return (bool) $hidden['hidden'];
1286         }
1287
1288         /**
1289          * Returns posts from a given contact url
1290          *
1291          * @param string $contact_url Contact URL
1292          * @param bool   $thread_mode
1293          * @param int    $update      Update mode
1294          * @param int    $parent      Item parent ID for the update mode
1295          * @return string posts in HTML
1296          * @throws \Exception
1297          */
1298         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1299         {
1300                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1301         }
1302
1303         /**
1304          * Returns posts from a given contact id
1305          *
1306          * @param int  $cid         Contact ID
1307          * @param bool $thread_mode
1308          * @param int  $update      Update mode
1309          * @param int  $parent     Item parent ID for the update mode
1310          * @return string posts in HTML
1311          * @throws \Exception
1312          */
1313         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1314         {
1315                 $a = DI::app();
1316
1317                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1318                 if (!DBA::isResult($contact)) {
1319                         return '';
1320                 }
1321
1322                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1323                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1324                 } else {
1325                         $sql = "`uid` = ?";
1326                 }
1327
1328                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1329
1330                 if ($thread_mode) {
1331                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1332                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1333                 } else {
1334                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1335                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1336                 }
1337
1338                 if (!empty($parent)) {
1339                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1340                 } else {
1341                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1342                         if (!empty($last_received)) {
1343                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1344                         }
1345                 }
1346
1347                 if (DI::mode()->isMobile()) {
1348                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1349                                 DI::config()->get('system', 'itemspage_network_mobile'));
1350                 } else {
1351                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1352                                 DI::config()->get('system', 'itemspage_network'));
1353                 }
1354
1355                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1356
1357                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1358
1359                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1360                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1361                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1362                 } else {
1363                         $o = '';
1364                 }
1365
1366                 if ($thread_mode) {
1367                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1368
1369                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1370                 } else {
1371                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1372
1373                         $o .= conversation($a, $items, 'contact-posts', $update);
1374                 }
1375
1376                 if (!$update) {
1377                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1378                                 $o .= HTML::scrollLoader();
1379                         } else {
1380                                 $o .= $pager->renderMinimal(count($items));
1381                         }
1382                 }
1383
1384                 return $o;
1385         }
1386
1387         /**
1388          * Returns the account type name
1389          *
1390          * The function can be called with either the user or the contact array
1391          *
1392          * @param array $contact contact or user array
1393          * @return string
1394          */
1395         public static function getAccountType(array $contact)
1396         {
1397                 // There are several fields that indicate that the contact or user is a forum
1398                 // "page-flags" is a field in the user table,
1399                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1400                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1401                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1402                         || (isset($contact['forum']) && intval($contact['forum']))
1403                         || (isset($contact['prv']) && intval($contact['prv']))
1404                         || (isset($contact['community']) && intval($contact['community']))
1405                 ) {
1406                         $type = self::TYPE_COMMUNITY;
1407                 } else {
1408                         $type = self::TYPE_PERSON;
1409                 }
1410
1411                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1412                 if (isset($contact["contact-type"])) {
1413                         $type = $contact["contact-type"];
1414                 }
1415
1416                 if (isset($contact["account-type"])) {
1417                         $type = $contact["account-type"];
1418                 }
1419
1420                 switch ($type) {
1421                         case self::TYPE_ORGANISATION:
1422                                 $account_type = DI::l10n()->t("Organisation");
1423                                 break;
1424
1425                         case self::TYPE_NEWS:
1426                                 $account_type = DI::l10n()->t('News');
1427                                 break;
1428
1429                         case self::TYPE_COMMUNITY:
1430                                 $account_type = DI::l10n()->t("Forum");
1431                                 break;
1432
1433                         default:
1434                                 $account_type = "";
1435                                 break;
1436                 }
1437
1438                 return $account_type;
1439         }
1440
1441         /**
1442          * Blocks a contact
1443          *
1444          * @param int $cid
1445          * @return bool
1446          * @throws \Exception
1447          */
1448         public static function block($cid, $reason = null)
1449         {
1450                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1451
1452                 return $return;
1453         }
1454
1455         /**
1456          * Unblocks a contact
1457          *
1458          * @param int $cid
1459          * @return bool
1460          * @throws \Exception
1461          */
1462         public static function unblock($cid)
1463         {
1464                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1465
1466                 return $return;
1467         }
1468
1469         /**
1470          * Ensure that cached avatar exist
1471          *
1472          * @param integer $cid
1473          */
1474         public static function checkAvatarCache(int $cid)
1475         {
1476                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1477                 if (!DBA::isResult($contact)) {
1478                         return;
1479                 }
1480
1481                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1482                         return;
1483                 }
1484
1485                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1486
1487                 self::updateAvatar($cid, $contact['avatar'], true);
1488         }
1489
1490         /**
1491          * Return the photo path for a given contact array in the given size
1492          *
1493          * @param array $contact    contact array
1494          * @param string $field     Fieldname of the photo in the contact array
1495          * @param string $size      Size of the avatar picture
1496          * @param string $avatar    Avatar path that is displayed when no photo had been found
1497          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1498          * @return string photo path
1499          */
1500         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1501         {
1502                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1503                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1504         }
1505
1506         /**
1507          * Return the photo path for a given contact array
1508          *
1509          * @param array  $contact   Contact array
1510          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1511          * @return string photo path
1512          */
1513         public static function getPhoto(array $contact, bool $no_update = false)
1514         {
1515                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1516         }
1517
1518         /**
1519          * Return the photo path (thumb size) for a given contact array
1520          *
1521          * @param array  $contact   Contact array
1522          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1523          * @return string photo path
1524          */
1525         public static function getThumb(array $contact, bool $no_update = false)
1526         {
1527                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1528         }
1529
1530         /**
1531          * Return the photo path (micro size) for a given contact array
1532          *
1533          * @param array  $contact   Contact array
1534          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1535          * @return string photo path
1536          */
1537         public static function getMicro(array $contact, bool $no_update = false)
1538         {
1539                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1540         }
1541
1542         /**
1543          * Check the given contact array for avatar cache fields
1544          *
1545          * @param array $contact
1546          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1547          * @return array contact array with avatar cache fields
1548          */
1549         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1550         {
1551                 $update = false;
1552                 $contact_fields = [];
1553                 $fields = ['photo', 'thumb', 'micro'];
1554                 foreach ($fields as $field) {
1555                         if (isset($contact[$field])) {
1556                                 $contact_fields[] = $field;
1557                         }
1558                         if (isset($contact[$field]) && empty($contact[$field])) {
1559                                 $update = true;
1560                         }
1561                 }
1562
1563                 if (!$update || $no_update) {
1564                         return $contact;
1565                 }
1566
1567                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1568                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1569
1570                         $new_contact = self::getById($contact['id'], $contact_fields);
1571                         if (DBA::isResult($new_contact)) {
1572                                 // We only update the cache fields
1573                                 $contact = array_merge($contact, $new_contact);
1574                         }
1575                 }
1576
1577                 /// add the default avatars if the fields aren't filled
1578                 if (isset($contact['photo']) && empty($contact['photo'])) {
1579                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1580                 }
1581                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1582                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1583                 }
1584                 if (isset($contact['micro']) && empty($contact['micro'])) {
1585                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1586                 }
1587
1588                 return $contact;
1589         }
1590
1591         /**
1592          * Fetch the default avatar for the given contact and size
1593          *
1594          * @param array $contact  contact array
1595          * @param string $size    Size of the avatar picture
1596          * @return string avatar URL
1597          */
1598         public static function getDefaultAvatar(array $contact, string $size)
1599         {
1600                 switch ($size) {
1601                         case Proxy::SIZE_MICRO:
1602                                 $avatar['size'] = 48;
1603                                 $default = self::DEFAULT_AVATAR_MICRO;
1604                                 break;
1605
1606                         case Proxy::SIZE_THUMB:
1607                                 $avatar['size'] = 80;
1608                                 $default = self::DEFAULT_AVATAR_THUMB;
1609                                 break;
1610
1611                         case Proxy::SIZE_SMALL:
1612                         default:
1613                                 $avatar['size'] = 300;
1614                                 $default = self::DEFAULT_AVATAR_PHOTO;
1615                                 break;
1616                 }
1617
1618                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1619                         return DI::baseUrl() . $default;
1620                 }
1621
1622                 if (!empty($contact['xmpp'])) {
1623                         $avatar['email'] = $contact['xmpp'];
1624                 } elseif (!empty($contact['addr'])) {
1625                         $avatar['email'] = $contact['addr'];
1626                 } elseif (!empty($contact['url'])) {
1627                         $avatar['email'] = $contact['url'];
1628                 } else {
1629                         return DI::baseUrl() . $default;
1630                 }
1631
1632                 $avatar['url'] = '';
1633                 $avatar['success'] = false;
1634
1635                 Hook::callAll('avatar_lookup', $avatar);
1636
1637                 if ($avatar['success'] && !empty($avatar['url'])) {
1638                         return $avatar['url'];
1639                 }
1640
1641                 return DI::baseUrl() . $default;
1642         }
1643
1644         /**
1645          * Get avatar link for given contact id
1646          *
1647          * @param integer $cid     contact id
1648          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1649          * @param string  $updated Contact update date
1650          * @return string avatar link
1651          */
1652         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = ''):string
1653         {
1654                 // We have to fetch the "updated" variable when it wasn't provided
1655                 // The parameter can be provided to improve performance
1656                 if (empty($updated)) {
1657                         $contact = self::getById($cid, ['updated']);
1658                         $updated = $contact['updated'] ?? '';
1659                 }
1660
1661                 $url = DI::baseUrl() . '/photo/contact/';
1662                 switch ($size) {
1663                         case Proxy::SIZE_MICRO:
1664                                 $url .= Proxy::PIXEL_MICRO . '/';
1665                                 break;
1666                         case Proxy::SIZE_THUMB:
1667                                 $url .= Proxy::PIXEL_THUMB . '/';
1668                                 break;
1669                         case Proxy::SIZE_SMALL:
1670                                 $url .= Proxy::PIXEL_SMALL . '/';
1671                                 break;
1672                         case Proxy::SIZE_MEDIUM:
1673                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1674                                 break;
1675                         case Proxy::SIZE_LARGE:
1676                                 $url .= Proxy::PIXEL_LARGE . '/';
1677                                 break;
1678                 }
1679                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1680         }
1681
1682         /**
1683          * Get avatar link for given contact URL
1684          *
1685          * @param string  $url  contact url
1686          * @param integer $uid  user id
1687          * @param string  $size One of the ProxyUtils::SIZE_* constants
1688          * @return string avatar link
1689          */
1690         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1691         {
1692                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1693                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1694                 $contact = self::selectFirst(['id', 'updated'], $condition);
1695                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1696         }
1697
1698         /**
1699          * Get header link for given contact id
1700          *
1701          * @param integer $cid     contact id
1702          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1703          * @param string  $updated Contact update date
1704          * @return string header link
1705          */
1706         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = ''):string
1707         {
1708                 // We have to fetch the "updated" variable when it wasn't provided
1709                 // The parameter can be provided to improve performance
1710                 if (empty($updated)) {
1711                         $contact = self::getById($cid, ['updated']);
1712                         $updated = $contact['updated'] ?? '';
1713                 }
1714
1715                 $url = DI::baseUrl() . '/photo/header/';
1716                 switch ($size) {
1717                         case Proxy::SIZE_MICRO:
1718                                 $url .= Proxy::PIXEL_MICRO . '/';
1719                                 break;
1720                         case Proxy::SIZE_THUMB:
1721                                 $url .= Proxy::PIXEL_THUMB . '/';
1722                                 break;
1723                         case Proxy::SIZE_SMALL:
1724                                 $url .= Proxy::PIXEL_SMALL . '/';
1725                                 break;
1726                         case Proxy::SIZE_MEDIUM:
1727                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1728                                 break;
1729                         case Proxy::SIZE_LARGE:
1730                                 $url .= Proxy::PIXEL_LARGE . '/';
1731                                 break;
1732                 }
1733
1734                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1735         }
1736
1737         /**
1738          * Updates the avatar links in a contact only if needed
1739          *
1740          * @param int    $cid          Contact id
1741          * @param string $avatar       Link to avatar picture
1742          * @param bool   $force        force picture update
1743          * @param bool   $create_cache Enforces the creation of cached avatar fields
1744          *
1745          * @return void
1746          * @throws HTTPException\InternalServerErrorException
1747          * @throws HTTPException\NotFoundException
1748          * @throws \ImagickException
1749          */
1750         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1751         {
1752                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1753                         ['id' => $cid, 'self' => false]);
1754                 if (!DBA::isResult($contact)) {
1755                         return;
1756                 }
1757
1758                 $uid = $contact['uid'];
1759
1760                 // Only update the cached photo links of public contacts when they already are cached
1761                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1762                         if ($contact['avatar'] != $avatar) {
1763                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1764                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1765                         }
1766                         return;
1767                 }
1768
1769                 // User contacts use are updated through the public contacts
1770                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1771                         $pcid = self::getIdForURL($contact['url'], false);
1772                         if (!empty($pcid)) {
1773                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1774                                 self::updateAvatar($pcid, $avatar, $force, true);
1775                                 return;
1776                         }
1777                 }
1778
1779                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1780
1781                 if ($default_avatar) {
1782                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1783                 }
1784
1785                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1786                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1787                                 'photo' => $avatar,
1788                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1789                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1790                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1791                 }
1792
1793                 // Use the data from the self account
1794                 if (empty($fields)) {
1795                         $local_uid = User::getIdForURL($contact['url']);
1796                         if (!empty($local_uid)) {
1797                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1798                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1799                         }
1800                 }
1801
1802                 if (empty($fields)) {
1803                         $update = ($contact['avatar'] != $avatar) || $force;
1804
1805                         if (!$update) {
1806                                 $data = [
1807                                         $contact['photo'] ?? '',
1808                                         $contact['thumb'] ?? '',
1809                                         $contact['micro'] ?? '',
1810                                 ];
1811
1812                                 foreach ($data as $image_uri) {
1813                                         $image_rid = Photo::ridFromURI($image_uri);
1814                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1815                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1816                                                 $update = true;
1817                                         }
1818                                 }
1819                         }
1820
1821                         if ($update) {
1822                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1823                                 if ($photos) {
1824                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1825                                         $update = !empty($fields);
1826                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1827                                 } else {
1828                                         $update = false;
1829                                 }
1830                         }
1831                 } else {
1832                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1833                 }
1834
1835                 if (!$update) {
1836                         return;
1837                 }
1838
1839                 $cids = [];
1840                 $uids = [];
1841                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1842                         // Collect all user contacts of the given public contact
1843                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1844                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1845                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1846                                 $cids[] = $personal_contact['id'];
1847                                 $uids[] = $personal_contact['uid'];
1848                         }
1849                         DBA::close($personal_contacts);
1850
1851                         if (!empty($cids)) {
1852                                 // Delete possibly existing cached user contact avatars
1853                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1854                         }
1855                 }
1856
1857                 $cids[] = $cid;
1858                 $uids[] = $uid;
1859                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1860                 DBA::update('contact', $fields, ['id' => $cids]);
1861         }
1862
1863         public static function deleteContactByUrl(string $url)
1864         {
1865                 // Update contact data for all users
1866                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1867                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1868                 while ($contact = DBA::fetch($contacts)) {
1869                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1870                         self::remove($contact['id']);
1871                 }
1872         }
1873
1874         /**
1875          * Helper function for "updateFromProbe". Updates personal and public contact
1876          *
1877          * @param integer $id      contact id
1878          * @param integer $uid     user id
1879          * @param string  $old_url The previous profile URL of the contact
1880          * @param string  $new_url The profile URL of the contact
1881          * @param array   $fields  The fields that are updated
1882          *
1883          * @throws \Exception
1884          */
1885         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1886         {
1887                 if (Strings::normaliseLink($new_url) != Strings::normaliseLink($old_url)) {
1888                         Logger::notice('New URL differs from old URL', ['old' => $old_url, 'new' => $new_url]);
1889                         return;
1890                 }
1891
1892                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1893                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1894                         return;
1895                 }
1896
1897                 // Search for duplicated contacts and get rid of them
1898                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1899                         return;
1900                 }
1901
1902                 // Archive or unarchive the contact.
1903                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1904                 if (!DBA::isResult($contact)) {
1905                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1906                         return;
1907                 }
1908
1909                 if (isset($fields['failed'])) {
1910                         if ($fields['failed']) {
1911                                 self::markForArchival($contact);
1912                         } else {
1913                                 self::unmarkForArchival($contact);
1914                         }
1915                 }
1916
1917                 if ($contact['uid'] != 0) {
1918                         return;
1919                 }
1920
1921                 // Update contact data for all users
1922                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1923
1924                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1925                 DBA::update('contact', $fields, $condition);
1926
1927                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1928                 $condition['network'] = Protocol::OSTATUS;
1929
1930                 // If the contact failed, propagate the update fields to all contacts
1931                 if (empty($fields['failed'])) {
1932                         unset($fields['last-update']);
1933                         unset($fields['success_update']);
1934                         unset($fields['failure_update']);
1935                 }
1936
1937                 if (empty($fields)) {
1938                         return;
1939                 }
1940
1941                 DBA::update('contact', $fields, $condition);
1942         }
1943
1944         /**
1945          * Remove duplicated contacts
1946          *
1947          * @param string  $nurl  Normalised contact url
1948          * @param integer $uid   User id
1949          * @return boolean
1950          * @throws \Exception
1951          */
1952         public static function removeDuplicates(string $nurl, int $uid)
1953         {
1954                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1955                 $count = DBA::count('contact', $condition);
1956                 if ($count <= 1) {
1957                         return false;
1958                 }
1959
1960                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1961                 if (!DBA::isResult($first_contact)) {
1962                         // Shouldn't happen - so we handle it
1963                         return false;
1964                 }
1965
1966                 $first = $first_contact['id'];
1967                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1968                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1969                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1970                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1971                         return false;
1972                 }
1973
1974                 // Find all duplicates
1975                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1976                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1977                 while ($duplicate = DBA::fetch($duplicates)) {
1978                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1979                                 continue;
1980                         }
1981
1982                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1983                 }
1984                 DBA::close($duplicates);
1985                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
1986                 return true;
1987         }
1988
1989         /**
1990          * @param integer $id      contact id
1991          * @param string  $network Optional network we are probing for
1992          * @return boolean
1993          * @throws HTTPException\InternalServerErrorException
1994          * @throws \ImagickException
1995          */
1996         public static function updateFromProbe(int $id, string $network = '')
1997         {
1998                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
1999                 if (!DBA::isResult($contact)) {
2000                         return false;
2001                 }
2002
2003                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2004                 return self::updateFromProbeArray($id, $ret);
2005         }
2006
2007         /**
2008          * @param integer $id      contact id
2009          * @param array   $ret     Probed data
2010          * @return boolean
2011          * @throws HTTPException\InternalServerErrorException
2012          * @throws \ImagickException
2013          */
2014         private static function updateFromProbeArray(int $id, array $ret)
2015         {
2016                 /*
2017                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2018                   This will reliably kill your communication with old Friendica contacts.
2019                  */
2020
2021                 // These fields aren't updated by this routine:
2022                 // 'xmpp', 'sensitive'
2023
2024                 $fields = ['uid', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2025                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2026                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
2027                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2028                 if (!DBA::isResult($contact)) {
2029                         return false;
2030                 }
2031
2032                 if (self::isLocal($ret['url'])) {
2033                         if ($contact['uid'] == 0) {
2034                                 Logger::info('Local contacts are not updated here.');
2035                         } else {
2036                                 self::updateFromPublicContact($id, $contact);
2037                         }
2038                         return true;
2039                 }
2040
2041                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2042                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2043                         self::remove($id);
2044
2045                         // Delete all contacts with the same URL
2046                         self::deleteContactByUrl($ret['url']);
2047                         return true;
2048                 }
2049
2050                 $uid = $contact['uid'];
2051                 unset($contact['uid']);
2052
2053                 $pubkey = $contact['pubkey'];
2054                 unset($contact['pubkey']);
2055
2056                 $contact['photo'] = $contact['avatar'];
2057                 unset($contact['avatar']);
2058
2059                 $updated = DateTimeFormat::utcNow();
2060
2061                 // We must not try to update relay contacts via probe. They are no real contacts.
2062                 // We check after the probing to be able to correct falsely detected contact types.
2063                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2064                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2065                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2066                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2067                         return true;
2068                 }
2069
2070                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2071                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2072                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2073                         return false;
2074                 }
2075
2076                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2077                         $cid = self::getIdForURL($ret['url']);
2078                         if (!empty($cid) && ($cid != $id)) {
2079                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2080                                 return self::updateFromProbeArray($cid, $ret);
2081                         }
2082                 }
2083
2084                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2085                         $ret['unsearchable'] = $ret['hide'];
2086                 }
2087
2088                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2089                         $ret['forum'] = false;
2090                         $ret['prv'] = false;
2091                         $ret['contact-type'] = $ret['account-type'];
2092                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2093                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2094                                 $ret['prv'] = (bool)!$ret['forum'];
2095                         }
2096                 }
2097
2098                 $new_pubkey = $ret['pubkey'] ?? '';
2099
2100                 if ($uid == 0) {
2101                         $ret['last-item'] = Probe::getLastUpdate($ret);
2102                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2103                 }
2104
2105                 $update = false;
2106
2107                 // make sure to not overwrite existing values with blank entries except some technical fields
2108                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2109                 foreach ($ret as $key => $val) {
2110                         if (!array_key_exists($key, $contact)) {
2111                                 unset($ret[$key]);
2112                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2113                                 $ret[$key] = $contact[$key];
2114                         } elseif ($ret[$key] != $contact[$key]) {
2115                                 $update = true;
2116                         }
2117                 }
2118
2119                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2120                         $update = true;
2121                 } else {
2122                         unset($ret['last-item']);
2123                 }
2124
2125                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2126                         self::updateAvatar($id, $ret['photo'], $update);
2127                 }
2128
2129                 if (!$update) {
2130                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2131
2132                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2133                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2134                         }
2135
2136                         // Update the public contact
2137                         if ($uid != 0) {
2138                                 $contact = self::getByURL($ret['url'], false, ['id']);
2139                                 if (!empty($contact['id'])) {
2140                                         self::updateFromProbeArray($contact['id'], $ret);
2141                                 }
2142                         }
2143
2144                         return true;
2145                 }
2146
2147                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2148                 $ret['updated'] = $updated;
2149                 $ret['failed'] = false;
2150
2151                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2152                 if (empty($pubkey) && !empty($new_pubkey)) {
2153                         $ret['pubkey'] = $new_pubkey;
2154                 }
2155
2156                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2157                         $ret['uri-date'] = DateTimeFormat::utcNow();
2158                 }
2159
2160                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2161                         $ret['name-date'] = $updated;
2162                 }
2163
2164                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2165                         $ret['last-update'] = $updated;
2166                         $ret['success_update'] = $updated;
2167                 }
2168
2169                 unset($ret['photo']);
2170
2171                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2172
2173                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2174                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2175                 }
2176
2177                 return true;
2178         }
2179
2180         private static function updateFromPublicContact(int $id, array $contact)
2181         {
2182                 $public = self::getByURL($contact['url'], false);
2183
2184                 $fields = [];
2185
2186                 foreach ($contact as $field => $value) {
2187                         if ($field == 'uid') {
2188                                 continue;
2189                         }
2190                         if ($public[$field] != $value) {
2191                                 $fields[$field] = $public[$field];
2192                         }
2193                 }
2194                 if (!empty($fields)) {
2195                         DBA::update('contact', $fields, ['id' => $id, 'self' => false]);
2196                         Logger::info('Updating local contact', ['id' => $id]);
2197                 }
2198         }
2199
2200         /**
2201          * @param integer $url contact url
2202          * @return integer Contact id
2203          * @throws HTTPException\InternalServerErrorException
2204          * @throws \ImagickException
2205          */
2206         public static function updateFromProbeByURL($url)
2207         {
2208                 $id = self::getIdForURL($url);
2209
2210                 if (empty($id)) {
2211                         return $id;
2212                 }
2213
2214                 self::updateFromProbe($id);
2215
2216                 return $id;
2217         }
2218
2219         /**
2220          * Detects if a given contact array belongs to a legacy DFRN connection
2221          *
2222          * @param array $contact
2223          * @return boolean
2224          */
2225         public static function isLegacyDFRNContact($contact)
2226         {
2227                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2228                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2229         }
2230
2231         /**
2232          * Detects the communication protocol for a given contact url.
2233          * This is used to detect Friendica contacts that we can communicate via AP.
2234          *
2235          * @param string $url contact url
2236          * @param string $network Network of that contact
2237          * @return string with protocol
2238          */
2239         public static function getProtocol($url, $network)
2240         {
2241                 if ($network != Protocol::DFRN) {
2242                         return $network;
2243                 }
2244
2245                 $apcontact = APContact::getByURL($url);
2246                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2247                         return Protocol::ACTIVITYPUB;
2248                 } else {
2249                         return $network;
2250                 }
2251         }
2252
2253         /**
2254          * Takes a $uid and a url/handle and adds a new contact
2255          *
2256          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2257          * dfrn_request page.
2258          *
2259          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2260          *
2261          * Returns an array
2262          * $return['success'] boolean true if successful
2263          * $return['message'] error text if success is false.
2264          *
2265          * Takes a $uid and a url/handle and adds a new contact
2266          *
2267          * @param array  $user        The user the contact should be created for
2268          * @param string $url         The profile URL of the contact
2269          * @param bool   $interactive
2270          * @param string $network
2271          * @return array
2272          * @throws HTTPException\InternalServerErrorException
2273          * @throws HTTPException\NotFoundException
2274          * @throws \ImagickException
2275          */
2276         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2277         {
2278                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2279
2280                 // remove ajax junk, e.g. Twitter
2281                 $url = str_replace('/#!/', '/', $url);
2282
2283                 if (!Network::isUrlAllowed($url)) {
2284                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2285                         return $result;
2286                 }
2287
2288                 if (Network::isUrlBlocked($url)) {
2289                         $result['message'] = DI::l10n()->t('Blocked domain');
2290                         return $result;
2291                 }
2292
2293                 if (!$url) {
2294                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2295                         return $result;
2296                 }
2297
2298                 $arr = ['url' => $url, 'contact' => []];
2299
2300                 Hook::callAll('follow', $arr);
2301
2302                 if (empty($arr)) {
2303                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2304                         return $result;
2305                 }
2306
2307                 if (!empty($arr['contact']['name'])) {
2308                         $probed = false;
2309                         $ret = $arr['contact'];
2310                 } else {
2311                         $probed = true;
2312                         $ret = Probe::uri($url, $network, $user['uid']);
2313                 }
2314
2315                 if (($network != '') && ($ret['network'] != $network)) {
2316                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2317                         return $result;
2318                 }
2319
2320                 // check if we already have a contact
2321                 // the poll url is more reliable than the profile url, as we may have
2322                 // indirect links or webfinger links
2323
2324                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2325                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2326                 if (!DBA::isResult($contact)) {
2327                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2328                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2329                 }
2330
2331                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2332
2333                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2334                         if ($interactive) {
2335                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2336                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2337                                 } else {
2338                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2339                                 }
2340
2341                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2342
2343                                 // NOTREACHED
2344                         }
2345                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2346                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2347                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2348                         return $result;
2349                 }
2350
2351                 // This extra param just confuses things, remove it
2352                 if ($protocol === Protocol::DIASPORA) {
2353                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2354                 }
2355
2356                 // do we have enough information?
2357                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2358                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2359                         if (empty($ret['poll'])) {
2360                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2361                         }
2362                         if (empty($ret['name'])) {
2363                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2364                         }
2365                         if (empty($ret['url'])) {
2366                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2367                         }
2368                         if (strpos($ret['url'], '@') !== false) {
2369                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2370                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2371                         }
2372                         return $result;
2373                 }
2374
2375                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2376                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2377                         $ret['notify'] = '';
2378                 }
2379
2380                 if (!$ret['notify']) {
2381                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2382                 }
2383
2384                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2385
2386                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2387
2388                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2389
2390                 $pending = false;
2391                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2392                         $pending = (bool)$ret['manually-approve'];
2393                 }
2394
2395                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2396                         $writeable = 1;
2397                 }
2398
2399                 if (DBA::isResult($contact)) {
2400                         // update contact
2401                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2402
2403                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2404                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2405                 } else {
2406                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2407
2408                         // create contact record
2409                         self::insert([
2410                                 'uid'     => $user['uid'],
2411                                 'created' => DateTimeFormat::utcNow(),
2412                                 'url'     => $ret['url'],
2413                                 'nurl'    => Strings::normaliseLink($ret['url']),
2414                                 'addr'    => $ret['addr'],
2415                                 'alias'   => $ret['alias'],
2416                                 'batch'   => $ret['batch'],
2417                                 'notify'  => $ret['notify'],
2418                                 'poll'    => $ret['poll'],
2419                                 'poco'    => $ret['poco'],
2420                                 'name'    => $ret['name'],
2421                                 'nick'    => $ret['nick'],
2422                                 'network' => $ret['network'],
2423                                 'baseurl' => $ret['baseurl'],
2424                                 'gsid'    => $ret['gsid'] ?? null,
2425                                 'protocol' => $protocol,
2426                                 'pubkey'  => $ret['pubkey'],
2427                                 'rel'     => $new_relation,
2428                                 'priority'=> $ret['priority'],
2429                                 'writable'=> $writeable,
2430                                 'hidden'  => $hidden,
2431                                 'blocked' => 0,
2432                                 'readonly'=> 0,
2433                                 'pending' => $pending,
2434                                 'subhub'  => $subhub
2435                         ]);
2436                 }
2437
2438                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2439                 if (!DBA::isResult($contact)) {
2440                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2441                         return $result;
2442                 }
2443
2444                 $contact_id = $contact['id'];
2445                 $result['cid'] = $contact_id;
2446
2447                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2448
2449                 // Update the avatar
2450                 self::updateAvatar($contact_id, $ret['photo']);
2451
2452                 // pull feed and consume it, which should subscribe to the hub.
2453                 if ($contact['network'] == Protocol::OSTATUS) {
2454                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2455                 }
2456
2457                 if ($probed) {
2458                         self::updateFromProbeArray($contact_id, $ret);
2459                 } else {
2460                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2461                 }
2462
2463                 $owner = User::getOwnerDataById($user['uid']);
2464
2465                 if (DBA::isResult($owner)) {
2466                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2467                                 // create a follow slap
2468                                 $item = [];
2469                                 $item['verb'] = Activity::FOLLOW;
2470                                 $item['gravity'] = GRAVITY_ACTIVITY;
2471                                 $item['follow'] = $contact["url"];
2472                                 $item['body'] = '';
2473                                 $item['title'] = '';
2474                                 $item['guid'] = '';
2475                                 $item['uri-id'] = 0;
2476
2477                                 $slap = OStatus::salmon($item, $owner);
2478
2479                                 if (!empty($contact['notify'])) {
2480                                         Salmon::slapper($owner, $contact['notify'], $slap);
2481                                 }
2482                         } elseif ($protocol == Protocol::DIASPORA) {
2483                                 $ret = Diaspora::sendShare($owner, $contact);
2484                                 Logger::log('share returns: ' . $ret);
2485                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2486                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2487                                 if (empty($activity_id)) {
2488                                         // This really should never happen
2489                                         return false;
2490                                 }
2491
2492                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2493                                 Logger::log('Follow returns: ' . $ret);
2494                         }
2495                 }
2496
2497                 $result['success'] = true;
2498                 return $result;
2499         }
2500
2501         /**
2502          * Updated contact's SSL policy
2503          *
2504          * @param array  $contact    Contact array
2505          * @param string $new_policy New policy, valid: self,full
2506          *
2507          * @return array Contact array with updated values
2508          * @throws \Exception
2509          */
2510         public static function updateSslPolicy(array $contact, $new_policy)
2511         {
2512                 $ssl_changed = false;
2513                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2514                         $ssl_changed = true;
2515                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2516                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2517                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2518                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2519                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2520                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2521                 }
2522
2523                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2524                         $ssl_changed = true;
2525                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2526                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2527                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2528                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2529                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2530                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2531                 }
2532
2533                 if ($ssl_changed) {
2534                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2535                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2536                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2537                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2538                 }
2539
2540                 return $contact;
2541         }
2542
2543         /**
2544          * Follow a contact
2545          *
2546          * @param int $cid Public contact id
2547          * @param int $uid  User ID
2548          *
2549          * @return bool "true" if following had been successful
2550          */
2551         public static function follow(int $cid, int $uid)
2552         {
2553                 $user = User::getById($uid);
2554                 if (empty($user)) {
2555                         return false;
2556                 }
2557
2558                 $contact = self::getById($cid, ['url']);
2559
2560                 $result = self::createFromProbe($user, $contact['url'], false);
2561
2562                 return $result['cid'];
2563         }
2564
2565         /**
2566          * Unfollow a contact
2567          *
2568          * @param int $cid Public contact id
2569          * @param int $uid  User ID
2570          *
2571          * @return bool "true" if unfollowing had been successful
2572          */
2573         public static function unfollow(int $cid, int $uid)
2574         {
2575                 $cdata = self::getPublicAndUserContacID($cid, $uid);
2576                 if (empty($cdata['user'])) {
2577                         return false;
2578                 }
2579
2580                 $contact = self::getById($cdata['user']);
2581
2582                 self::removeSharer([], $contact);
2583
2584                 return true;
2585         }
2586
2587         /**
2588          * @param array  $importer Owner (local user) data
2589          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2590          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2591          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2592          * @param string $note     Introduction additional message
2593          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2594          * @throws HTTPException\InternalServerErrorException
2595          * @throws \ImagickException
2596          */
2597         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2598         {
2599                 // Should always be set
2600                 if (empty($datarray['author-id'])) {
2601                         return false;
2602                 }
2603
2604                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2605                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2606                 if (!DBA::isResult($pub_contact)) {
2607                         // Should never happen
2608                         return false;
2609                 }
2610
2611                 // Contact is blocked at node-level
2612                 if (self::isBlocked($datarray['author-id'])) {
2613                         return false;
2614                 }
2615
2616                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2617                 $name = $pub_contact['name'];
2618                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2619                 $nick = $pub_contact['nick'];
2620                 $network = $pub_contact['network'];
2621
2622                 // Ensure that we don't create a new contact when there already is one
2623                 $cid = self::getIdForURL($url, $importer['uid']);
2624                 if (!empty($cid)) {
2625                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2626                 }
2627
2628                 if (!empty($contact)) {
2629                         if (!empty($contact['pending'])) {
2630                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2631                                 return null;
2632                         }
2633
2634                         // Contact is blocked at user-level
2635                         if (!empty($contact['id']) && !empty($importer['id']) &&
2636                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2637                                 return false;
2638                         }
2639
2640                         // Make sure that the existing contact isn't archived
2641                         self::unmarkForArchival($contact);
2642
2643                         if (($contact['rel'] == self::SHARING)
2644                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2645                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2646                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2647                         }
2648
2649                         // Ensure to always have the correct network type, independent from the connection request method
2650                         self::updateFromProbe($contact['id']);
2651
2652                         Post\UserNotification::insertNotication($contact['id'], Verb::getID(Activity::FOLLOW), $importer['uid']);
2653
2654                         return true;
2655                 } else {
2656                         // send email notification to owner?
2657                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2658                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2659                                 return null;
2660                         }
2661
2662                         // create contact record
2663                         DBA::insert('contact', [
2664                                 'uid'      => $importer['uid'],
2665                                 'created'  => DateTimeFormat::utcNow(),
2666                                 'url'      => $url,
2667                                 'nurl'     => Strings::normaliseLink($url),
2668                                 'name'     => $name,
2669                                 'nick'     => $nick,
2670                                 'network'  => $network,
2671                                 'rel'      => self::FOLLOWER,
2672                                 'blocked'  => 0,
2673                                 'readonly' => 0,
2674                                 'pending'  => 1,
2675                                 'writable' => 1,
2676                         ]);
2677
2678                         $contact_id = DBA::lastInsertId();
2679
2680                         // Ensure to always have the correct network type, independent from the connection request method
2681                         self::updateFromProbe($contact_id);
2682
2683                         self::updateAvatar($contact_id, $photo, true);
2684
2685                         Post\UserNotification::insertNotication($contact_id, Verb::getID(Activity::FOLLOW), $importer['uid']);
2686
2687                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2688
2689                         /// @TODO Encapsulate this into a function/method
2690                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2691                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2692                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2693                                 // create notification
2694                                 $hash = Strings::getRandomHex();
2695
2696                                 if (is_array($contact_record)) {
2697                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2698                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2699                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2700                                 }
2701
2702                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2703
2704                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2705                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2706
2707                                         notification([
2708                                                 'type'  => Notification\Type::INTRO,
2709                                                 'otype' => Notification\ObjectType::INTRO,
2710                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2711                                                 'uid'   => $user['uid'],
2712                                                 'cid'   => $contact_record['id'],
2713                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2714                                         ]);
2715                                 }
2716                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2717                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2718                                         self::createFromProbe($importer, $url, false, $network);
2719                                 }
2720
2721                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2722                                 $fields = ['pending' => false];
2723                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2724                                         $fields['rel'] = self::FRIEND;
2725                                 }
2726
2727                                 DBA::update('contact', $fields, $condition);
2728
2729                                 return true;
2730                         }
2731                 }
2732
2733                 return null;
2734         }
2735
2736         public static function removeFollower($importer, $contact)
2737         {
2738                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2739                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2740                 } else {
2741                         self::remove($contact['id']);
2742                 }
2743         }
2744
2745         public static function removeSharer($importer, $contact)
2746         {
2747                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2748                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2749                 } else {
2750                         self::remove($contact['id']);
2751                 }
2752         }
2753
2754         /**
2755          * Create a birthday event.
2756          *
2757          * Update the year and the birthday.
2758          */
2759         public static function updateBirthdays()
2760         {
2761                 $condition = [
2762                         '`bd` > ?
2763                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2764                         AND NOT `contact`.`pending`
2765                         AND NOT `contact`.`hidden`
2766                         AND NOT `contact`.`blocked`
2767                         AND NOT `contact`.`archive`
2768                         AND NOT `contact`.`deleted`',
2769                         DBA::NULL_DATE,
2770                         self::SHARING,
2771                         self::FRIEND
2772                 ];
2773
2774                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2775
2776                 while ($contact = DBA::fetch($contacts)) {
2777                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2778
2779                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2780
2781                         if (Event::createBirthday($contact, $nextbd)) {
2782                                 // update bdyear
2783                                 DBA::update(
2784                                         'contact',
2785                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2786                                         ['id' => $contact['id']]
2787                                 );
2788                         }
2789                 }
2790                 DBA::close($contacts);
2791         }
2792
2793         /**
2794          * Remove the unavailable contact ids from the provided list
2795          *
2796          * @param array $contact_ids Contact id list
2797          * @return array
2798          * @throws \Exception
2799          */
2800         public static function pruneUnavailable(array $contact_ids)
2801         {
2802                 if (empty($contact_ids)) {
2803                         return [];
2804                 }
2805
2806                 $contacts = self::selectToArray(['id'], [
2807                         'id'      => $contact_ids,
2808                         'blocked' => false,
2809                         'pending' => false,
2810                         'archive' => false,
2811                 ]);
2812
2813                 return array_column($contacts, 'id');
2814         }
2815
2816         /**
2817          * Returns a magic link to authenticate remote visitors
2818          *
2819          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2820          *
2821          * @param string $contact_url The address of the target contact profile
2822          * @param string $url         An url that we will be redirected to after the authentication
2823          *
2824          * @return string with "redir" link
2825          * @throws HTTPException\InternalServerErrorException
2826          * @throws \ImagickException
2827          */
2828         public static function magicLink($contact_url, $url = '')
2829         {
2830                 if (!Session::isAuthenticated()) {
2831                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2832                 }
2833
2834                 $contact = self::getByURL($contact_url, false);
2835                 if (empty($contact)) {
2836                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2837                 }
2838
2839                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2840                 unset($contact['uid']);
2841
2842                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2843         }
2844
2845         /**
2846          * Returns a magic link to authenticate remote visitors
2847          *
2848          * @param integer $cid The contact id of the target contact profile
2849          * @param string  $url An url that we will be redirected to after the authentication
2850          *
2851          * @return string with "redir" link
2852          * @throws HTTPException\InternalServerErrorException
2853          * @throws \ImagickException
2854          */
2855         public static function magicLinkById($cid, $url = '')
2856         {
2857                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2858
2859                 return self::magicLinkByContact($contact, $url);
2860         }
2861
2862         /**
2863          * Returns a magic link to authenticate remote visitors
2864          *
2865          * @param array  $contact The contact array with "uid", "network" and "url"
2866          * @param string $url     An url that we will be redirected to after the authentication
2867          *
2868          * @return string with "redir" link
2869          * @throws HTTPException\InternalServerErrorException
2870          * @throws \ImagickException
2871          */
2872         public static function magicLinkByContact($contact, $url = '')
2873         {
2874                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2875
2876                 if (!Session::isAuthenticated()) {
2877                         return $destination;
2878                 }
2879
2880                 // Only redirections to the same host do make sense
2881                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2882                         return $url;
2883                 }
2884
2885                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2886                         return 'contact/' . $contact['id'] . '/conversations';
2887                 }
2888
2889                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2890                         return $destination;
2891                 }
2892
2893                 if (empty($contact['id'])) {
2894                         return $destination;
2895                 }
2896
2897                 $redirect = 'redir/' . $contact['id'];
2898
2899                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2900                         $redirect .= '?url=' . $url;
2901                 }
2902
2903                 return $redirect;
2904         }
2905
2906         /**
2907          * Is the contact a forum?
2908          *
2909          * @param integer $contactid ID of the contact
2910          *
2911          * @return boolean "true" if it is a forum
2912          */
2913         public static function isForum($contactid)
2914         {
2915                 $fields = ['forum', 'prv'];
2916                 $condition = ['id' => $contactid];
2917                 $contact = DBA::selectFirst('contact', $fields, $condition);
2918                 if (!DBA::isResult($contact)) {
2919                         return false;
2920                 }
2921
2922                 // Is it a forum?
2923                 return ($contact['forum'] || $contact['prv']);
2924         }
2925
2926         /**
2927          * Can the remote contact receive private messages?
2928          *
2929          * @param array $contact
2930          * @return bool
2931          */
2932         public static function canReceivePrivateMessages(array $contact)
2933         {
2934                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2935                 $self = $contact['self'] ?? false;
2936
2937                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2938         }
2939
2940         /**
2941          * Search contact table by nick or name
2942          *
2943          * @param string $search Name or nick
2944          * @param string $mode   Search mode (e.g. "community")
2945          * @param int    $uid    User ID
2946          *
2947          * @return array with search results
2948          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2949          */
2950         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2951         {
2952                 if (empty($search)) {
2953                         return [];
2954                 }
2955
2956                 // check supported networks
2957                 if (DI::config()->get('system', 'diaspora_enabled')) {
2958                         $diaspora = Protocol::DIASPORA;
2959                 } else {
2960                         $diaspora = Protocol::DFRN;
2961                 }
2962
2963                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2964                         $ostatus = Protocol::OSTATUS;
2965                 } else {
2966                         $ostatus = Protocol::DFRN;
2967                 }
2968
2969                 // check if we search only communities or every contact
2970                 if ($mode === 'community') {
2971                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
2972                 } else {
2973                         $extra_sql = '';
2974                 }
2975
2976                 $search .= '%';
2977
2978                 $results = DBA::p("SELECT * FROM `contact`
2979                         WHERE (NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` where `publish` OR `net-publish`))
2980                                 AND `network` IN (?, ?, ?, ?) AND
2981                                 NOT `failed` AND `uid` = ? AND
2982                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2983                                 ORDER BY `nurl` DESC LIMIT 1000",
2984                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $uid, $search, $search, $search
2985                 );
2986
2987                 $contacts = DBA::toArray($results);
2988                 return $contacts;
2989         }
2990
2991         /**
2992          * Add public contacts from an array
2993          *
2994          * @param array $urls
2995          * @return array result "count", "added" and "updated"
2996          */
2997         public static function addByUrls(array $urls)
2998         {
2999                 $added = 0;
3000                 $updated = 0;
3001                 $unchanged = 0;
3002                 $count = 0;
3003
3004                 foreach ($urls as $url) {
3005                         if (empty($url) || !is_string($url)) {
3006                                 continue;
3007                         }
3008                         $contact = self::getByURL($url, false, ['id', 'updated']);
3009                         if (empty($contact['id'])) {
3010                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3011                                 ++$added;
3012                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3013                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3014                                 ++$updated;
3015                         } else {
3016                                 ++$unchanged;
3017                         }
3018                         ++$count;
3019                 }
3020
3021                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3022         }
3023
3024         /**
3025          * Returns a random, global contact array of the current node
3026          *
3027          * @return array The profile array
3028          * @throws Exception
3029          */
3030         public static function getRandomContact()
3031         {
3032                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3033                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3034                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3035                 ], ['order' => ['RAND()']]);
3036
3037                 if (DBA::isResult($contact)) {
3038                         return $contact;
3039                 }
3040
3041                 return [];
3042         }
3043 }