src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\App\BaseURL;
  25 use Friendica\Content\Pager;
  26 use Friendica\Content\Text\HTML;
  27 use Friendica\Core\Hook;
  28 use Friendica\Core\Logger;
  29 use Friendica\Core\Protocol;
  30 use Friendica\Core\Renderer;
  31 use Friendica\Core\Session;
  32 use Friendica\Core\System;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\Database;
  35 use Friendica\Database\DBA;
  36 use Friendica\DI;
  37 use Friendica\Network\HTTPException;
  38 use Friendica\Network\Probe;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\Diaspora;
  42 use Friendica\Protocol\OStatus;
  43 use Friendica\Protocol\Salmon;
  44 use Friendica\Util\DateTimeFormat;
  45 use Friendica\Util\Images;
  46 use Friendica\Util\Network;
  47 use Friendica\Util\Proxy;
  48 use Friendica\Util\Strings;
  49
  50 /**
  51  * functions for interacting with a contact
  52  */
  53 class Contact
  54 {
  55         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  56         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  57         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  58
  59         /**
  60          * @deprecated since version 2019.03
  61          * @see User::PAGE_FLAGS_NORMAL
  62          */
  63         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  64         /**
  65          * @deprecated since version 2019.03
  66          * @see User::PAGE_FLAGS_SOAPBOX
  67          */
  68         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  69         /**
  70          * @deprecated since version 2019.03
  71          * @see User::PAGE_FLAGS_COMMUNITY
  72          */
  73         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  74         /**
  75          * @deprecated since version 2019.03
  76          * @see User::PAGE_FLAGS_FREELOVE
  77          */
  78         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  79         /**
  80          * @deprecated since version 2019.03
  81          * @see User::PAGE_FLAGS_BLOG
  82          */
  83         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  84         /**
  85          * @deprecated since version 2019.03
  86          * @see User::PAGE_FLAGS_PRVGROUP
  87          */
  88         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  89         /**
  90          * @}
  91          */
  92
  93         const LOCK_INSERT = 'contact-insert';
  94
  95         /**
  96          * Account types
  97          *
  98          * TYPE_UNKNOWN - unknown type
  99          *
 100          * TYPE_PERSON - the account belongs to a person
 101          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
 102          *
 103          * TYPE_ORGANISATION - the account belongs to an organisation
 104          *      Associated page type: PAGE_SOAPBOX
 105          *
 106          * TYPE_NEWS - the account is a news reflector
 107          *      Associated page type: PAGE_SOAPBOX
 108          *
 109          * TYPE_COMMUNITY - the account is community forum
 110          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 111          *
 112          * TYPE_RELAY - the account is a relay
 113          *      This will only be assigned to contacts, not to user accounts
 114          * @{
 115          */
 116         const TYPE_UNKNOWN =     -1;
 117         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 118         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 119         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 120         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 121         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 122         /**
 123          * @}
 124          */
 125
 126         /**
 127          * Contact_is
 128          *
 129          * Relationship types
 130          * @{
 131          */
 132         const NOTHING  = 0;
 133         const FOLLOWER = 1;
 134         const SHARING  = 2;
 135         const FRIEND   = 3;
 136         /**
 137          * @}
 138          */
 139
 140          const MIRROR_DEACTIVATED = 0;
 141          const MIRROR_FORWARDED = 1;
 142          const MIRROR_OWN_POST = 2;
 143          const MIRROR_NATIVE_RESHARE = 3;
 144
 145          /**
 146          * @param array $fields    Array of selected fields, empty for all
 147          * @param array $condition Array of fields for condition
 148          * @param array $params    Array of several parameters
 149          * @return array
 150          * @throws \Exception
 151          */
 152         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 153         {
 154                 return DBA::selectToArray('contact', $fields, $condition, $params);
 155         }
 156
 157         /**
 158          * @param array $fields    Array of selected fields, empty for all
 159          * @param array $condition Array of fields for condition
 160          * @param array $params    Array of several parameters
 161          * @return array
 162          * @throws \Exception
 163          */
 164         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 165         {
 166                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 167
 168                 return $contact;
 169         }
 170
 171         /**
 172          * Insert a row into the contact table
 173          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 174          *
 175          * @param array $fields         field array
 176          * @param int   $duplicate_mode Do an update on a duplicate entry
 177          *
 178          * @return int  id of the created contact
 179          * @throws \Exception
 180          */
 181         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 182         {
 183                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 184                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 185                 }
 186
 187                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 188
 189                 if (empty($fields['created'])) {
 190                         $fields['created'] = DateTimeFormat::utcNow();
 191                 }
 192
 193                 DBA::insert('contact', $fields, $duplicate_mode);
 194                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 195                 if (!DBA::isResult($contact)) {
 196                         // Shouldn't happen
 197                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 198                         return 0;
 199                 }
 200
 201                 Contact\User::insertForContactArray($contact);
 202
 203                 // Search for duplicated contacts and get rid of them
 204                 if (!$contact['self']) {
 205                         self::removeDuplicates($contact['nurl'], $contact['uid']);
 206                 }
 207
 208                 return $contact['id'];
 209         }
 210
 211         /**
 212          * Updates rows in the contact table
 213          *
 214          * @param array         $fields     contains the fields that are updated
 215          * @param array         $condition  condition array with the key values
 216          * @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate, false = don't update identical fields)
 217          *
 218          * @return boolean was the update successfull?
 219          * @throws \Exception
 220          */
 221         public static function update(array $fields, array $condition, $old_fields = [])
 222         {
 223                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 224                 // @todo Apply changes to the "user-contact" table on dedicated fields
 225                 return $ret;
 226         }
 227
 228         /**
 229          * @param integer $id     Contact ID
 230          * @param array   $fields Array of selected fields, empty for all
 231          * @return array|boolean Contact record if it exists, false otherwise
 232          * @throws \Exception
 233          */
 234         public static function getById($id, $fields = [])
 235         {
 236                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 237         }
 238
 239         /**
 240          * Fetches a contact by a given url
 241          *
 242          * @param string  $url    profile url
 243          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 244          * @param array   $fields Field list
 245          * @param integer $uid    User ID of the contact
 246          * @return array contact array
 247          */
 248         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 249         {
 250                 if ($update || is_null($update)) {
 251                         $cid = self::getIdForURL($url, $uid, $update);
 252                         if (empty($cid)) {
 253                                 return [];
 254                         }
 255
 256                         $contact = self::getById($cid, $fields);
 257                         if (empty($contact)) {
 258                                 return [];
 259                         }
 260                         return $contact;
 261                 }
 262
 263                 // Add internal fields
 264                 $removal = [];
 265                 if (!empty($fields)) {
 266                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 267                                 if (!in_array($internal, $fields)) {
 268                                         $fields[] = $internal;
 269                                         $removal[] = $internal;
 270                                 }
 271                         }
 272                 }
 273
 274                 // We first try the nurl (http://server.tld/nick), most common case
 275                 $options = ['order' => ['id']];
 276                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 277
 278                 // Then the addr (nick@server.tld)
 279                 if (!DBA::isResult($contact)) {
 280                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 281                 }
 282
 283                 // Then the alias (which could be anything)
 284                 if (!DBA::isResult($contact)) {
 285                         // The link could be provided as http although we stored it as https
 286                         $ssl_url = str_replace('http://', 'https://', $url);
 287                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 288                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 289                 }
 290
 291                 if (!DBA::isResult($contact)) {
 292                         return [];
 293                 }
 294
 295                 // Update the contact in the background if needed
 296                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 297                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 298                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 299                 }
 300
 301                 // Remove the internal fields
 302                 foreach ($removal as $internal) {
 303                         unset($contact[$internal]);
 304                 }
 305
 306                 return $contact;
 307         }
 308
 309         /**
 310          * Fetches a contact for a given user by a given url.
 311          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 312          *
 313          * @param string  $url    profile url
 314          * @param integer $uid    User ID of the contact
 315          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 316          * @param array   $fields Field list
 317          * @return array contact array
 318          */
 319         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 320         {
 321                 if ($uid != 0) {
 322                         $contact = self::getByURL($url, $update, $fields, $uid);
 323                         if (!empty($contact)) {
 324                                 if (!empty($contact['id'])) {
 325                                         $contact['cid'] = $contact['id'];
 326                                         $contact['zid'] = 0;
 327                                 }
 328                                 return $contact;
 329                         }
 330                 }
 331
 332                 $contact = self::getByURL($url, $update, $fields);
 333                 if (!empty($contact['id'])) {
 334                         $contact['cid'] = 0;
 335                         $contact['zid'] = $contact['id'];
 336                 }
 337                 return $contact;
 338         }
 339
 340         /**
 341          * Tests if the given contact is a follower
 342          *
 343          * @param int $cid Either public contact id or user's contact id
 344          * @param int $uid User ID
 345          *
 346          * @return boolean is the contact id a follower?
 347          * @throws HTTPException\InternalServerErrorException
 348          * @throws \ImagickException
 349          */
 350         public static function isFollower($cid, $uid)
 351         {
 352                 if (Contact\User::isBlocked($cid, $uid)) {
 353                         return false;
 354                 }
 355
 356                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 357                 if (empty($cdata['user'])) {
 358                         return false;
 359                 }
 360
 361                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 362                 return DBA::exists('contact', $condition);
 363         }
 364
 365         /**
 366          * Tests if the given contact url is a follower
 367          *
 368          * @param string $url Contact URL
 369          * @param int    $uid User ID
 370          *
 371          * @return boolean is the contact id a follower?
 372          * @throws HTTPException\InternalServerErrorException
 373          * @throws \ImagickException
 374          */
 375         public static function isFollowerByURL($url, $uid)
 376         {
 377                 $cid = self::getIdForURL($url, $uid);
 378
 379                 if (empty($cid)) {
 380                         return false;
 381                 }
 382
 383                 return self::isFollower($cid, $uid);
 384         }
 385
 386         /**
 387          * Tests if the given user follow the given contact
 388          *
 389          * @param int $cid Either public contact id or user's contact id
 390          * @param int $uid User ID
 391          *
 392          * @return boolean is the contact url being followed?
 393          * @throws HTTPException\InternalServerErrorException
 394          * @throws \ImagickException
 395          */
 396         public static function isSharing($cid, $uid)
 397         {
 398                 if (Contact\User::isBlocked($cid, $uid)) {
 399                         return false;
 400                 }
 401
 402                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 403                 if (empty($cdata['user'])) {
 404                         return false;
 405                 }
 406
 407                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 408                 return DBA::exists('contact', $condition);
 409         }
 410
 411         /**
 412          * Tests if the given user follow the given contact url
 413          *
 414          * @param string $url Contact URL
 415          * @param int    $uid User ID
 416          *
 417          * @return boolean is the contact url being followed?
 418          * @throws HTTPException\InternalServerErrorException
 419          * @throws \ImagickException
 420          */
 421         public static function isSharingByURL($url, $uid)
 422         {
 423                 $cid = self::getIdForURL($url, $uid);
 424
 425                 if (empty($cid)) {
 426                         return false;
 427                 }
 428
 429                 return self::isSharing($cid, $uid);
 430         }
 431
 432         /**
 433          * Get the basepath for a given contact link
 434          *
 435          * @param string $url The contact link
 436          * @param boolean $dont_update Don't update the contact
 437          *
 438          * @return string basepath
 439          * @throws HTTPException\InternalServerErrorException
 440          * @throws \ImagickException
 441          */
 442         public static function getBasepath($url, $dont_update = false)
 443         {
 444                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 445                 if (!DBA::isResult($contact)) {
 446                         return '';
 447                 }
 448
 449                 if (!empty($contact['baseurl'])) {
 450                         return $contact['baseurl'];
 451                 } elseif ($dont_update) {
 452                         return '';
 453                 }
 454
 455                 // Update the existing contact
 456                 self::updateFromProbe($contact['id']);
 457
 458                 // And fetch the result
 459                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 460                 if (empty($contact['baseurl'])) {
 461                         Logger::info('No baseurl for contact', ['url' => $url]);
 462                         return '';
 463                 }
 464
 465                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 466                 return $contact['baseurl'];
 467         }
 468
 469         /**
 470          * Check if the given contact url is on the same server
 471          *
 472          * @param string $url The contact link
 473          *
 474          * @return boolean Is it the same server?
 475          */
 476         public static function isLocal($url)
 477         {
 478                 if (!parse_url($url, PHP_URL_SCHEME)) {
 479                         $addr_parts = explode('@', $url);
 480                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 481                 }
 482
 483                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 484         }
 485
 486         /**
 487          * Check if the given contact ID is on the same server
 488          *
 489          * @param string $url The contact link
 490          *
 491          * @return boolean Is it the same server?
 492          */
 493         public static function isLocalById(int $cid)
 494         {
 495                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 496                 if (!DBA::isResult($contact)) {
 497                         return false;
 498                 }
 499
 500                 if (empty($contact['baseurl'])) {
 501                         $baseurl = self::getBasepath($contact['url'], true);
 502                 } else {
 503                         $baseurl = $contact['baseurl'];
 504                 }
 505
 506                 return Strings::compareLink($baseurl, DI::baseUrl());
 507         }
 508
 509         /**
 510          * Returns the public contact id of the given user id
 511          *
 512          * @param  integer $uid User ID
 513          *
 514          * @return integer|boolean Public contact id for given user id
 515          * @throws \Exception
 516          */
 517         public static function getPublicIdByUserId($uid)
 518         {
 519                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 520                 if (!DBA::isResult($self)) {
 521                         return false;
 522                 }
 523                 return self::getIdForURL($self['url']);
 524         }
 525
 526         /**
 527          * Returns the contact id for the user and the public contact id for a given contact id
 528          *
 529          * @param int $cid Either public contact id or user's contact id
 530          * @param int $uid User ID
 531          *
 532          * @return array with public and user's contact id
 533          * @throws HTTPException\InternalServerErrorException
 534          * @throws \ImagickException
 535          */
 536         public static function getPublicAndUserContactID($cid, $uid)
 537         {
 538                 // We have to use the legacy function as long as the post update hasn't finished
 539                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 540                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 541                 }
 542
 543                 if (empty($uid) || empty($cid)) {
 544                         return [];
 545                 }
 546
 547                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 548                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 549                         return [];
 550                 }
 551
 552                 $pcid = $contact['pid'];
 553                 if ($contact['uid'] == $uid) {
 554                         $ucid = $contact['id'];
 555                 } else {
 556                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 557                         if (DBA::isResult($contact)) {
 558                                 $ucid = $contact['id'];
 559                         } else {
 560                                 $ucid = 0;
 561                         }
 562                 }
 563
 564                 return ['public' => $pcid, 'user' => $ucid];
 565         }
 566
 567         /**
 568          * Helper function for "getPublicAndUserContactID"
 569          *
 570          * @param int $cid Either public contact id or user's contact id
 571          * @param int $uid User ID
 572          *
 573          * @return array with public and user's contact id
 574          * @throws HTTPException\InternalServerErrorException
 575          * @throws \ImagickException
 576          */
 577         private static function legacyGetPublicAndUserContactID($cid, $uid)
 578         {
 579                 if (empty($uid) || empty($cid)) {
 580                         return [];
 581                 }
 582
 583                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 584                 if (!DBA::isResult($contact)) {
 585                         return [];
 586                 }
 587
 588                 // We quit when the user id don't match the user id of the provided contact
 589                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 590                         return [];
 591                 }
 592
 593                 if ($contact['uid'] != 0) {
 594                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 595                         if (empty($pcid)) {
 596                                 return [];
 597                         }
 598                         $ucid = $contact['id'];
 599                 } else {
 600                         $pcid = $contact['id'];
 601                         $ucid = self::getIdForURL($contact['url'], $uid);
 602                 }
 603
 604                 return ['public' => $pcid, 'user' => $ucid];
 605         }
 606
 607         /**
 608          * Returns contact details for a given contact id in combination with a user id
 609          *
 610          * @param int $cid A contact ID
 611          * @param int $uid The User ID
 612          * @param array $fields The selected fields for the contact
 613          *
 614          * @return array The contact details
 615          *
 616          * @throws \Exception
 617          */
 618         public static function getContactForUser($cid, $uid, array $fields = [])
 619         {
 620                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 621
 622                 if (!DBA::isResult($contact)) {
 623                         return [];
 624                 } else {
 625                         return $contact;
 626                 }
 627         }
 628
 629         /**
 630          * Creates the self-contact for the provided user id
 631          *
 632          * @param int $uid
 633          * @return bool Operation success
 634          * @throws HTTPException\InternalServerErrorException
 635          */
 636         public static function createSelfFromUserId($uid)
 637         {
 638                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 639                         ['uid' => $uid, 'account_expired' => false]);
 640                 if (!DBA::isResult($user)) {
 641                         return false;
 642                 }
 643
 644                 $contact = [
 645                         'uid'         => $user['uid'],
 646                         'created'     => DateTimeFormat::utcNow(),
 647                         'self'        => 1,
 648                         'name'        => $user['username'],
 649                         'nick'        => $user['nickname'],
 650                         'pubkey'      => $user['pubkey'],
 651                         'prvkey'      => $user['prvkey'],
 652                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 653                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 654                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 655                         'blocked'     => 0,
 656                         'pending'     => 0,
 657                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 658                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 659                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 660                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 661                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 662                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 663                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 664                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 665                         'name-date'   => DateTimeFormat::utcNow(),
 666                         'uri-date'    => DateTimeFormat::utcNow(),
 667                         'avatar-date' => DateTimeFormat::utcNow(),
 668                         'closeness'   => 0
 669                 ];
 670
 671                 $return = true;
 672
 673                 // Only create the entry if it doesn't exist yet
 674                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 675                         $return = (bool)self::insert($contact);
 676                 }
 677
 678                 // Create the public contact
 679                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 680                         $contact['self']   = false;
 681                         $contact['uid']    = 0;
 682                         $contact['prvkey'] = null;
 683
 684                         self::insert($contact, Database::INSERT_IGNORE);
 685                 }
 686
 687                 return $return;
 688         }
 689
 690         /**
 691          * Updates the self-contact for the provided user id
 692          *
 693          * @param int     $uid
 694          * @param boolean $update_avatar Force the avatar update
 695          * @return bool   "true" if updated
 696          * @throws HTTPException\InternalServerErrorException
 697          */
 698         public static function updateSelfFromUserID($uid, $update_avatar = false)
 699         {
 700                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 701                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 702                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 703                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 704                 if (!DBA::isResult($self)) {
 705                         return false;
 706                 }
 707
 708                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 709                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 710                 if (!DBA::isResult($user)) {
 711                         return false;
 712                 }
 713
 714                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 715                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 716                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 717                 if (!DBA::isResult($profile)) {
 718                         return false;
 719                 }
 720
 721                 $file_suffix = 'jpg';
 722
 723                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 724                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 725                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 726                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 727                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'matrix' => $profile['matrix'], 'network' => Protocol::DFRN];
 728
 729                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 730                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 731                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 732                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 733                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 734                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 735                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 736                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 737                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 738
 739                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 740                 if (DBA::isResult($avatar)) {
 741                         if ($update_avatar) {
 742                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 743                         }
 744
 745                         // Creating the path to the avatar, beginning with the file suffix
 746                         $types = Images::supportedTypes();
 747                         if (isset($types[$avatar['type']])) {
 748                                 $file_suffix = $types[$avatar['type']];
 749                         }
 750
 751                         // We are adding a timestamp value so that other systems won't use cached content
 752                         $timestamp = strtotime($fields['avatar-date']);
 753
 754                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 755                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 756
 757                         $fields['photo'] = $prefix . '4' . $suffix;
 758                         $fields['thumb'] = $prefix . '5' . $suffix;
 759                         $fields['micro'] = $prefix . '6' . $suffix;
 760                 } else {
 761                         // We hadn't found a photo entry, so we use the default avatar
 762                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 763                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 764                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 765                 }
 766
 767                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 768                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 769                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 770                 $fields['unsearchable'] = !$profile['net-publish'];
 771
 772                 $update = false;
 773
 774                 foreach ($fields as $field => $content) {
 775                         if ($self[$field] != $content) {
 776                                 $update = true;
 777                         }
 778                 }
 779
 780                 if ($update) {
 781                         if ($fields['name'] != $self['name']) {
 782                                 $fields['name-date'] = DateTimeFormat::utcNow();
 783                         }
 784                         $fields['updated'] = DateTimeFormat::utcNow();
 785                         self::update($fields, ['id' => $self['id']]);
 786
 787                         // Update the public contact as well
 788                         $fields['prvkey'] = null;
 789                         $fields['self']   = false;
 790                         self::update($fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 791
 792                         // Update the profile
 793                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 794                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 795                         DBA::update('profile', $fields, ['uid' => $uid]);
 796                 }
 797
 798                 return $update;
 799         }
 800
 801         /**
 802          * Marks a contact for removal
 803          *
 804          * @param int $id contact id
 805          * @return null
 806          * @throws HTTPException\InternalServerErrorException
 807          */
 808         public static function remove($id)
 809         {
 810                 // We want just to make sure that we don't delete our "self" contact
 811                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 812                 if (!DBA::isResult($contact)) {
 813                         return;
 814                 }
 815
 816                 // Archive the contact
 817                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 818
 819                 // Delete it in the background
 820                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 821         }
 822
 823         /**
 824          * Sends an unfriend message. Does not remove the contact
 825          *
 826          * @param array   $user     User unfriending
 827          * @param array   $contact  Contact unfriended
 828          * @param boolean $dissolve Remove the contact on the remote side
 829          * @return void
 830          * @throws HTTPException\InternalServerErrorException
 831          * @throws \ImagickException
 832          */
 833         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 834         {
 835                 if (empty($contact['network'])) {
 836                         return;
 837                 }
 838
 839                 $protocol = $contact['network'];
 840                 if (($protocol == Protocol::DFRN) && !empty($contact['protocol'])) {
 841                         $protocol = $contact['protocol'];
 842                 }
 843
 844                 if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 845                         // create an unfollow slap
 846                         $item = [];
 847                         $item['verb'] = Activity::O_UNFOLLOW;
 848                         $item['gravity'] = GRAVITY_ACTIVITY;
 849                         $item['follow'] = $contact["url"];
 850                         $item['body'] = '';
 851                         $item['title'] = '';
 852                         $item['guid'] = '';
 853                         $item['uri-id'] = 0;
 854                         $slap = OStatus::salmon($item, $user);
 855
 856                         if (!empty($contact['notify'])) {
 857                                 Salmon::slapper($user, $contact['notify'], $slap);
 858                         }
 859                 } elseif ($protocol == Protocol::DIASPORA) {
 860                         Diaspora::sendUnshare($user, $contact);
 861                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 862                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 863
 864                         if ($dissolve) {
 865                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 866                         }
 867                 }
 868         }
 869
 870         /**
 871          * Marks a contact for archival after a communication issue delay
 872          *
 873          * Contact has refused to recognise us as a friend. We will start a countdown.
 874          * If they still don't recognise us in 32 days, the relationship is over,
 875          * and we won't waste any more time trying to communicate with them.
 876          * This provides for the possibility that their database is temporarily messed
 877          * up or some other transient event and that there's a possibility we could recover from it.
 878          *
 879          * @param array $contact contact to mark for archival
 880          * @return null
 881          * @throws HTTPException\InternalServerErrorException
 882          */
 883         public static function markForArchival(array $contact)
 884         {
 885                 if (!isset($contact['url']) && !empty($contact['id'])) {
 886                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 887                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 888                         if (!DBA::isResult($contact)) {
 889                                 return;
 890                         }
 891                 } elseif (!isset($contact['url'])) {
 892                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 893                 }
 894
 895                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 896
 897                 // Contact already archived or "self" contact? => nothing to do
 898                 if ($contact['archive'] || $contact['self']) {
 899                         return;
 900                 }
 901
 902                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 903                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 904                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 905                 } else {
 906                         /* @todo
 907                          * We really should send a notification to the owner after 2-3 weeks
 908                          * so they won't be surprised when the contact vanishes and can take
 909                          * remedial action if this was a serious mistake or glitch
 910                          */
 911
 912                         /// @todo Check for contact vitality via probing
 913                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 914
 915                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 916                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 917                                 /* Relationship is really truly dead. archive them rather than
 918                                  * delete, though if the owner tries to unarchive them we'll start
 919                                  * the whole process over again.
 920                                  */
 921                                 self::update(['archive' => true], ['id' => $contact['id']]);
 922                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 923                         }
 924                 }
 925         }
 926
 927         /**
 928          * Cancels the archival countdown
 929          *
 930          * @see   Contact::markForArchival()
 931          *
 932          * @param array $contact contact to be unmarked for archival
 933          * @return null
 934          * @throws \Exception
 935          */
 936         public static function unmarkForArchival(array $contact)
 937         {
 938                 // Always unarchive the relay contact entry
 939                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 940                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 941                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 942                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 943                                 self::update($fields, $condition);
 944                         }
 945                 }
 946
 947                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 948                 $exists = DBA::exists('contact', $condition);
 949
 950                 // We don't need to update, we never marked this contact for archival
 951                 if (!$exists) {
 952                         return;
 953                 }
 954
 955                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 956
 957                 if (!isset($contact['url']) && !empty($contact['id'])) {
 958                         $fields = ['id', 'url', 'batch'];
 959                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 960                         if (!DBA::isResult($contact)) {
 961                                 return;
 962                         }
 963                 }
 964
 965                 // It's a miracle. Our dead contact has inexplicably come back to life.
 966                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 967                 self::update($fields, ['id' => $contact['id']]);
 968                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 969         }
 970
 971         /**
 972          * Returns the data array for the photo menu of a given contact
 973          *
 974          * @param array $contact contact
 975          * @param int   $uid     optional, default 0
 976          * @return array
 977          * @throws HTTPException\InternalServerErrorException
 978          * @throws \ImagickException
 979          */
 980         public static function photoMenu(array $contact, $uid = 0)
 981         {
 982                 $pm_url = '';
 983                 $status_link = '';
 984                 $photos_link = '';
 985                 $contact_drop_link = '';
 986                 $poke_link = '';
 987
 988                 if ($uid == 0) {
 989                         $uid = local_user();
 990                 }
 991
 992                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 993                         if ($uid == 0) {
 994                                 $profile_link = self::magicLinkByContact($contact);
 995                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 996
 997                                 return $menu;
 998                         }
 999
1000                         // Look for our own contact if the uid doesn't match and isn't public
1001                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1002                         if (DBA::isResult($contact_own)) {
1003                                 return self::photoMenu($contact_own, $uid);
1004                         }
1005                 }
1006
1007                 $sparkle = false;
1008                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1009                         $sparkle = true;
1010                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1011                 } else {
1012                         $profile_link = $contact['url'];
1013                 }
1014
1015                 if ($profile_link === 'mailbox') {
1016                         $profile_link = '';
1017                 }
1018
1019                 if ($sparkle) {
1020                         $status_link = $profile_link . '/status';
1021                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1022                         $profile_link = $profile_link . '/profile';
1023                 }
1024
1025                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1026                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1027                 }
1028
1029                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1030                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1031                 }
1032
1033                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1034
1035                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1036
1037                 if (!$contact['self']) {
1038                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
1039                 }
1040
1041                 $follow_link = '';
1042                 $unfollow_link = '';
1043                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
1044                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1045                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1046                         } elseif(!$contact['pending']) {
1047                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1048                         }
1049                 }
1050
1051                 if (!empty($follow_link) || !empty($unfollow_link)) {
1052                         $contact_drop_link = '';
1053                 }
1054
1055                 /**
1056                  * Menu array:
1057                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1058                  */
1059                 if (empty($contact['uid'])) {
1060                         $menu = [
1061                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1062                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1063                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1064                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1065                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1066                         ];
1067                 } else {
1068                         $menu = [
1069                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1070                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1071                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1072                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1073                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1074                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1075                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1076                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1077                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1078                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1079                         ];
1080
1081                         if (!empty($contact['pending'])) {
1082                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1083                                 if (DBA::isResult($intro)) {
1084                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1085                                 }
1086                         }
1087                 }
1088
1089                 $args = ['contact' => $contact, 'menu' => &$menu];
1090
1091                 Hook::callAll('contact_photo_menu', $args);
1092
1093                 $menucondensed = [];
1094
1095                 foreach ($menu as $menuname => $menuitem) {
1096                         if ($menuitem[1] != '') {
1097                                 $menucondensed[$menuname] = $menuitem;
1098                         }
1099                 }
1100
1101                 return $menucondensed;
1102         }
1103
1104         /**
1105          * Fetch the contact id for a given URL and user
1106          *
1107          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1108          * `addr` or `alias`.
1109          *
1110          * If there's no record and we aren't looking for a public contact, we quit.
1111          * If there's one, we check that it isn't time to update the picture else we
1112          * directly return the found contact id.
1113          *
1114          * Second, we probe the provided $url whether it's http://server.tld/profile or
1115          * nick@server.tld. We quit if we can't get any info back.
1116          *
1117          * Third, we create the contact record if it doesn't exist
1118          *
1119          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1120          * if there's any updates
1121          *
1122          * @param string  $url       Contact URL
1123          * @param integer $uid       The user id for the contact (0 = public contact)
1124          * @param boolean $update    true = always update, false = never update, null = update when not found
1125          * @param array   $default   Default value for creating the contact when everything else fails
1126          *
1127          * @return integer Contact ID
1128          * @throws HTTPException\InternalServerErrorException
1129          * @throws \ImagickException
1130          */
1131         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1132         {
1133                 $contact_id = 0;
1134
1135                 if ($url == '') {
1136                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1137                         return 0;
1138                 }
1139
1140                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1141
1142                 if (!empty($contact)) {
1143                         $contact_id = $contact["id"];
1144
1145                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1146                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1147                                 return $contact_id;
1148                         }
1149                 } elseif ($uid != 0) {
1150                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1151                         return 0;
1152                 } elseif (empty($default) && !is_null($update) && !$update) {
1153                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1154                         return 0;
1155                 }
1156
1157                 $data = [];
1158
1159                 if (empty($default['network']) || $update) {
1160                         $data = Probe::uri($url, "", $uid);
1161
1162                         // Take the default values when probing failed
1163                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1164                                 $data = array_merge($data, $default);
1165                         }
1166                 } elseif (!empty($default['network'])) {
1167                         $data = $default;
1168                 }
1169
1170                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1171                         // Fetch data for the public contact via the first found personal contact
1172                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1173                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1174                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1175                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1176
1177                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1178                         if (!DBA::isResult($personal_contact)) {
1179                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1180                         }
1181
1182                         if (DBA::isResult($personal_contact)) {
1183                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1184                                 $data = $personal_contact;
1185                                 $data['photo'] = $personal_contact['avatar'];
1186                                 $data['account-type'] = $personal_contact['contact-type'];
1187                                 $data['hide'] = $personal_contact['unsearchable'];
1188                                 unset($data['avatar']);
1189                                 unset($data['contact-type']);
1190                                 unset($data['unsearchable']);
1191                         }
1192                 }
1193
1194                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1195                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1196                         return 0;
1197                 }
1198
1199                 if (!$contact_id) {
1200                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1201                         if (!empty($data['alias'])) {
1202                                 $urls[] = Strings::normaliseLink($data['alias']);
1203                         }
1204                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1205                         if (!empty($contact['id'])) {
1206                                 $contact_id = $contact['id'];
1207                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1208                         }
1209                 }
1210
1211                 if (!$contact_id) {
1212                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1213                         $fields = [
1214                                 'uid'       => $uid,
1215                                 'url'       => $data['url'],
1216                                 'nurl'      => Strings::normaliseLink($data['url']),
1217                                 'network'   => $data['network'],
1218                                 'created'   => DateTimeFormat::utcNow(),
1219                                 'rel'       => self::SHARING,
1220                                 'writable'  => 1,
1221                                 'blocked'   => 0,
1222                                 'readonly'  => 0,
1223                                 'pending'   => 0];
1224
1225                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1226
1227                         // Before inserting we do check if the entry does exist now.
1228                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1229                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1230                                 if (DBA::isResult($contact)) {
1231                                         $contact_id = $contact['id'];
1232                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1233                                 } else {
1234                                         $contact_id = self::insert($fields);
1235                                         if ($contact_id) {
1236                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1237                                         }
1238                                 }
1239                                 DI::lock()->release(self::LOCK_INSERT);
1240                         } else {
1241                                 Logger::warning('Contact lock had not been acquired');
1242                         }
1243
1244                         if (!$contact_id) {
1245                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1246                                 return 0;
1247                         }
1248                 } else {
1249                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1250                 }
1251
1252                 self::updateFromProbeArray($contact_id, $data);
1253
1254                 // Don't return a number for a deleted account
1255                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1256                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1257                         return 0;
1258                 }
1259
1260                 return $contact_id;
1261         }
1262
1263         /**
1264          * Checks if the contact is archived
1265          *
1266          * @param int $cid contact id
1267          *
1268          * @return boolean Is the contact archived?
1269          * @throws HTTPException\InternalServerErrorException
1270          */
1271         public static function isArchived(int $cid)
1272         {
1273                 if ($cid == 0) {
1274                         return false;
1275                 }
1276
1277                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1278                 if (!DBA::isResult($contact)) {
1279                         return false;
1280                 }
1281
1282                 if ($contact['archive']) {
1283                         return true;
1284                 }
1285
1286                 // Check status of ActivityPub endpoints
1287                 $apcontact = APContact::getByURL($contact['url'], false);
1288                 if (!empty($apcontact)) {
1289                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1290                                 return true;
1291                         }
1292
1293                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1294                                 return true;
1295                         }
1296                 }
1297
1298                 // Check status of Diaspora endpoints
1299                 if (!empty($contact['batch'])) {
1300                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1301                         return DBA::exists('contact', $condition);
1302                 }
1303
1304                 return false;
1305         }
1306
1307         /**
1308          * Checks if the contact is blocked
1309          *
1310          * @param int $cid contact id
1311          *
1312          * @return boolean Is the contact blocked?
1313          * @throws HTTPException\InternalServerErrorException
1314          */
1315         public static function isBlocked($cid)
1316         {
1317                 if ($cid == 0) {
1318                         return false;
1319                 }
1320
1321                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1322                 if (!DBA::isResult($blocked)) {
1323                         return false;
1324                 }
1325
1326                 if (Network::isUrlBlocked($blocked['url'])) {
1327                         return true;
1328                 }
1329
1330                 return (bool) $blocked['blocked'];
1331         }
1332
1333         /**
1334          * Checks if the contact is hidden
1335          *
1336          * @param int $cid contact id
1337          *
1338          * @return boolean Is the contact hidden?
1339          * @throws \Exception
1340          */
1341         public static function isHidden($cid)
1342         {
1343                 if ($cid == 0) {
1344                         return false;
1345                 }
1346
1347                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1348                 if (!DBA::isResult($hidden)) {
1349                         return false;
1350                 }
1351                 return (bool) $hidden['hidden'];
1352         }
1353
1354         /**
1355          * Returns posts from a given contact url
1356          *
1357          * @param string $contact_url Contact URL
1358          * @param bool   $thread_mode
1359          * @param int    $update      Update mode
1360          * @param int    $parent      Item parent ID for the update mode
1361          * @return string posts in HTML
1362          * @throws \Exception
1363          */
1364         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1365         {
1366                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1367         }
1368
1369         /**
1370          * Returns posts from a given contact id
1371          *
1372          * @param int  $cid         Contact ID
1373          * @param bool $thread_mode
1374          * @param int  $update      Update mode
1375          * @param int  $parent     Item parent ID for the update mode
1376          * @return string posts in HTML
1377          * @throws \Exception
1378          */
1379         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1380         {
1381                 $a = DI::app();
1382
1383                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1384                 if (!DBA::isResult($contact)) {
1385                         return '';
1386                 }
1387
1388                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1389                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1390                 } else {
1391                         $sql = "`uid` = ?";
1392                 }
1393
1394                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1395
1396                 if ($thread_mode) {
1397                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1398                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1399                 } else {
1400                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1401                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1402                 }
1403
1404                 if (!empty($parent)) {
1405                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1406                 } else {
1407                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1408                         if (!empty($last_received)) {
1409                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1410                         }
1411                 }
1412
1413                 if (DI::mode()->isMobile()) {
1414                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1415                                 DI::config()->get('system', 'itemspage_network_mobile'));
1416                 } else {
1417                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1418                                 DI::config()->get('system', 'itemspage_network'));
1419                 }
1420
1421                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1422
1423                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1424
1425                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1426                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1427                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1428                 } else {
1429                         $o = '';
1430                 }
1431
1432                 if ($thread_mode) {
1433                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1434
1435                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1436                 } else {
1437                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1438
1439                         $o .= conversation($a, $items, 'contact-posts', $update);
1440                 }
1441
1442                 if (!$update) {
1443                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1444                                 $o .= HTML::scrollLoader();
1445                         } else {
1446                                 $o .= $pager->renderMinimal(count($items));
1447                         }
1448                 }
1449
1450                 return $o;
1451         }
1452
1453         /**
1454          * Returns the account type name
1455          *
1456          * The function can be called with either the user or the contact array
1457          *
1458          * @param array $contact contact or user array
1459          * @return string
1460          */
1461         public static function getAccountType(array $contact)
1462         {
1463                 // There are several fields that indicate that the contact or user is a forum
1464                 // "page-flags" is a field in the user table,
1465                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1466                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1467                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1468                         || (isset($contact['forum']) && intval($contact['forum']))
1469                         || (isset($contact['prv']) && intval($contact['prv']))
1470                         || (isset($contact['community']) && intval($contact['community']))
1471                 ) {
1472                         $type = self::TYPE_COMMUNITY;
1473                 } else {
1474                         $type = self::TYPE_PERSON;
1475                 }
1476
1477                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1478                 if (isset($contact["contact-type"])) {
1479                         $type = $contact["contact-type"];
1480                 }
1481
1482                 if (isset($contact["account-type"])) {
1483                         $type = $contact["account-type"];
1484                 }
1485
1486                 switch ($type) {
1487                         case self::TYPE_ORGANISATION:
1488                                 $account_type = DI::l10n()->t("Organisation");
1489                                 break;
1490
1491                         case self::TYPE_NEWS:
1492                                 $account_type = DI::l10n()->t('News');
1493                                 break;
1494
1495                         case self::TYPE_COMMUNITY:
1496                                 $account_type = DI::l10n()->t("Forum");
1497                                 break;
1498
1499                         default:
1500                                 $account_type = "";
1501                                 break;
1502                 }
1503
1504                 return $account_type;
1505         }
1506
1507         /**
1508          * Blocks a contact
1509          *
1510          * @param int $cid
1511          * @return bool
1512          * @throws \Exception
1513          */
1514         public static function block($cid, $reason = null)
1515         {
1516                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1517
1518                 return $return;
1519         }
1520
1521         /**
1522          * Unblocks a contact
1523          *
1524          * @param int $cid
1525          * @return bool
1526          * @throws \Exception
1527          */
1528         public static function unblock($cid)
1529         {
1530                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1531
1532                 return $return;
1533         }
1534
1535         /**
1536          * Ensure that cached avatar exist
1537          *
1538          * @param integer $cid
1539          */
1540         public static function checkAvatarCache(int $cid)
1541         {
1542                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1543                 if (!DBA::isResult($contact)) {
1544                         return;
1545                 }
1546
1547                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1548                         return;
1549                 }
1550
1551                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1552
1553                 self::updateAvatar($cid, $contact['avatar'], true);
1554         }
1555
1556         /**
1557          * Return the photo path for a given contact array in the given size
1558          *
1559          * @param array $contact    contact array
1560          * @param string $field     Fieldname of the photo in the contact array
1561          * @param string $size      Size of the avatar picture
1562          * @param string $avatar    Avatar path that is displayed when no photo had been found
1563          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1564          * @return string photo path
1565          */
1566         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1567         {
1568                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1569                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1570         }
1571
1572         /**
1573          * Return the photo path for a given contact array
1574          *
1575          * @param array  $contact   Contact array
1576          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1577          * @return string photo path
1578          */
1579         public static function getPhoto(array $contact, bool $no_update = false)
1580         {
1581                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1582         }
1583
1584         /**
1585          * Return the photo path (thumb size) for a given contact array
1586          *
1587          * @param array  $contact   Contact array
1588          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1589          * @return string photo path
1590          */
1591         public static function getThumb(array $contact, bool $no_update = false)
1592         {
1593                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1594         }
1595
1596         /**
1597          * Return the photo path (micro size) for a given contact array
1598          *
1599          * @param array  $contact   Contact array
1600          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1601          * @return string photo path
1602          */
1603         public static function getMicro(array $contact, bool $no_update = false)
1604         {
1605                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1606         }
1607
1608         /**
1609          * Check the given contact array for avatar cache fields
1610          *
1611          * @param array $contact
1612          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1613          * @return array contact array with avatar cache fields
1614          */
1615         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1616         {
1617                 $update = false;
1618                 $contact_fields = [];
1619                 $fields = ['photo', 'thumb', 'micro'];
1620                 foreach ($fields as $field) {
1621                         if (isset($contact[$field])) {
1622                                 $contact_fields[] = $field;
1623                         }
1624                         if (isset($contact[$field]) && empty($contact[$field])) {
1625                                 $update = true;
1626                         }
1627                 }
1628
1629                 if (!$update || $no_update) {
1630                         return $contact;
1631                 }
1632
1633                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1634                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1635
1636                         $new_contact = self::getById($contact['id'], $contact_fields);
1637                         if (DBA::isResult($new_contact)) {
1638                                 // We only update the cache fields
1639                                 $contact = array_merge($contact, $new_contact);
1640                         }
1641                 }
1642
1643                 /// add the default avatars if the fields aren't filled
1644                 if (isset($contact['photo']) && empty($contact['photo'])) {
1645                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1646                 }
1647                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1648                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1649                 }
1650                 if (isset($contact['micro']) && empty($contact['micro'])) {
1651                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1652                 }
1653
1654                 return $contact;
1655         }
1656
1657         /**
1658          * Fetch the default avatar for the given contact and size
1659          *
1660          * @param array $contact  contact array
1661          * @param string $size    Size of the avatar picture
1662          * @return string avatar URL
1663          */
1664         public static function getDefaultAvatar(array $contact, string $size)
1665         {
1666                 switch ($size) {
1667                         case Proxy::SIZE_MICRO:
1668                                 $avatar['size'] = 48;
1669                                 $default = self::DEFAULT_AVATAR_MICRO;
1670                                 break;
1671
1672                         case Proxy::SIZE_THUMB:
1673                                 $avatar['size'] = 80;
1674                                 $default = self::DEFAULT_AVATAR_THUMB;
1675                                 break;
1676
1677                         case Proxy::SIZE_SMALL:
1678                         default:
1679                                 $avatar['size'] = 300;
1680                                 $default = self::DEFAULT_AVATAR_PHOTO;
1681                                 break;
1682                 }
1683
1684                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1685                         return DI::baseUrl() . $default;
1686                 }
1687
1688                 if (!empty($contact['xmpp'])) {
1689                         $avatar['email'] = $contact['xmpp'];
1690                 } elseif (!empty($contact['addr'])) {
1691                         $avatar['email'] = $contact['addr'];
1692                 } elseif (!empty($contact['url'])) {
1693                         $avatar['email'] = $contact['url'];
1694                 } else {
1695                         return DI::baseUrl() . $default;
1696                 }
1697
1698                 $avatar['url'] = '';
1699                 $avatar['success'] = false;
1700
1701                 Hook::callAll('avatar_lookup', $avatar);
1702
1703                 if ($avatar['success'] && !empty($avatar['url'])) {
1704                         return $avatar['url'];
1705                 }
1706
1707                 return DI::baseUrl() . $default;
1708         }
1709
1710         /**
1711          * Get avatar link for given contact id
1712          *
1713          * @param integer $cid     contact id
1714          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1715          * @param string  $updated Contact update date
1716          * @return string avatar link
1717          */
1718         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = ''):string
1719         {
1720                 // We have to fetch the "updated" variable when it wasn't provided
1721                 // The parameter can be provided to improve performance
1722                 if (empty($updated)) {
1723                         $contact = self::getById($cid, ['updated']);
1724                         $updated = $contact['updated'] ?? '';
1725                 }
1726
1727                 $url = DI::baseUrl() . '/photo/contact/';
1728                 switch ($size) {
1729                         case Proxy::SIZE_MICRO:
1730                                 $url .= Proxy::PIXEL_MICRO . '/';
1731                                 break;
1732                         case Proxy::SIZE_THUMB:
1733                                 $url .= Proxy::PIXEL_THUMB . '/';
1734                                 break;
1735                         case Proxy::SIZE_SMALL:
1736                                 $url .= Proxy::PIXEL_SMALL . '/';
1737                                 break;
1738                         case Proxy::SIZE_MEDIUM:
1739                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1740                                 break;
1741                         case Proxy::SIZE_LARGE:
1742                                 $url .= Proxy::PIXEL_LARGE . '/';
1743                                 break;
1744                 }
1745                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1746         }
1747
1748         /**
1749          * Get avatar link for given contact URL
1750          *
1751          * @param string  $url  contact url
1752          * @param integer $uid  user id
1753          * @param string  $size One of the ProxyUtils::SIZE_* constants
1754          * @return string avatar link
1755          */
1756         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1757         {
1758                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1759                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1760                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1761                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1762         }
1763
1764         /**
1765          * Get header link for given contact id
1766          *
1767          * @param integer $cid     contact id
1768          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1769          * @param string  $updated Contact update date
1770          * @return string header link
1771          */
1772         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = ''):string
1773         {
1774                 // We have to fetch the "updated" variable when it wasn't provided
1775                 // The parameter can be provided to improve performance
1776                 if (empty($updated)) {
1777                         $contact = self::getById($cid, ['updated']);
1778                         $updated = $contact['updated'] ?? '';
1779                 }
1780
1781                 $url = DI::baseUrl() . '/photo/header/';
1782                 switch ($size) {
1783                         case Proxy::SIZE_MICRO:
1784                                 $url .= Proxy::PIXEL_MICRO . '/';
1785                                 break;
1786                         case Proxy::SIZE_THUMB:
1787                                 $url .= Proxy::PIXEL_THUMB . '/';
1788                                 break;
1789                         case Proxy::SIZE_SMALL:
1790                                 $url .= Proxy::PIXEL_SMALL . '/';
1791                                 break;
1792                         case Proxy::SIZE_MEDIUM:
1793                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1794                                 break;
1795                         case Proxy::SIZE_LARGE:
1796                                 $url .= Proxy::PIXEL_LARGE . '/';
1797                                 break;
1798                 }
1799
1800                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1801         }
1802
1803         /**
1804          * Updates the avatar links in a contact only if needed
1805          *
1806          * @param int    $cid          Contact id
1807          * @param string $avatar       Link to avatar picture
1808          * @param bool   $force        force picture update
1809          * @param bool   $create_cache Enforces the creation of cached avatar fields
1810          *
1811          * @return void
1812          * @throws HTTPException\InternalServerErrorException
1813          * @throws HTTPException\NotFoundException
1814          * @throws \ImagickException
1815          */
1816         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1817         {
1818                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1819                         ['id' => $cid, 'self' => false]);
1820                 if (!DBA::isResult($contact)) {
1821                         return;
1822                 }
1823
1824                 $uid = $contact['uid'];
1825
1826                 // Only update the cached photo links of public contacts when they already are cached
1827                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1828                         if ($contact['avatar'] != $avatar) {
1829                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1830                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1831                         }
1832                         return;
1833                 }
1834
1835                 // User contacts use are updated through the public contacts
1836                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1837                         $pcid = self::getIdForURL($contact['url'], 0, false);
1838                         if (!empty($pcid)) {
1839                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1840                                 self::updateAvatar($pcid, $avatar, $force, true);
1841                                 return;
1842                         }
1843                 }
1844
1845                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1846
1847                 if ($default_avatar) {
1848                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1849                 }
1850
1851                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1852                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1853                                 'photo' => $avatar,
1854                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1855                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1856                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1857                 }
1858
1859                 // Use the data from the self account
1860                 if (empty($fields)) {
1861                         $local_uid = User::getIdForURL($contact['url']);
1862                         if (!empty($local_uid)) {
1863                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1864                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1865                         }
1866                 }
1867
1868                 if (empty($fields)) {
1869                         $update = ($contact['avatar'] != $avatar) || $force;
1870
1871                         if (!$update) {
1872                                 $data = [
1873                                         $contact['photo'] ?? '',
1874                                         $contact['thumb'] ?? '',
1875                                         $contact['micro'] ?? '',
1876                                 ];
1877
1878                                 foreach ($data as $image_uri) {
1879                                         $image_rid = Photo::ridFromURI($image_uri);
1880                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1881                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1882                                                 $update = true;
1883                                         }
1884                                 }
1885                         }
1886
1887                         if ($update) {
1888                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1889                                 if ($photos) {
1890                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1891                                         $update = !empty($fields);
1892                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1893                                 } else {
1894                                         $update = false;
1895                                 }
1896                         }
1897                 } else {
1898                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1899                 }
1900
1901                 if (!$update) {
1902                         return;
1903                 }
1904
1905                 $cids = [];
1906                 $uids = [];
1907                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1908                         // Collect all user contacts of the given public contact
1909                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1910                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1911                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1912                                 $cids[] = $personal_contact['id'];
1913                                 $uids[] = $personal_contact['uid'];
1914                         }
1915                         DBA::close($personal_contacts);
1916
1917                         if (!empty($cids)) {
1918                                 // Delete possibly existing cached user contact avatars
1919                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1920                         }
1921                 }
1922
1923                 $cids[] = $cid;
1924                 $uids[] = $uid;
1925                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1926                 self::update($fields, ['id' => $cids]);
1927         }
1928
1929         public static function deleteContactByUrl(string $url)
1930         {
1931                 // Update contact data for all users
1932                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1933                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1934                 while ($contact = DBA::fetch($contacts)) {
1935                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1936                         self::remove($contact['id']);
1937                 }
1938         }
1939
1940         /**
1941          * Helper function for "updateFromProbe". Updates personal and public contact
1942          *
1943          * @param integer $id      contact id
1944          * @param integer $uid     user id
1945          * @param string  $old_url The previous profile URL of the contact
1946          * @param string  $new_url The profile URL of the contact
1947          * @param array   $fields  The fields that are updated
1948          *
1949          * @throws \Exception
1950          */
1951         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1952         {
1953                 if (!self::update($fields, ['id' => $id])) {
1954                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1955                         return;
1956                 }
1957
1958                 // Search for duplicated contacts and get rid of them
1959                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1960                         return;
1961                 }
1962
1963                 // Archive or unarchive the contact.
1964                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1965                 if (!DBA::isResult($contact)) {
1966                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1967                         return;
1968                 }
1969
1970                 if (isset($fields['failed'])) {
1971                         if ($fields['failed']) {
1972                                 self::markForArchival($contact);
1973                         } else {
1974                                 self::unmarkForArchival($contact);
1975                         }
1976                 }
1977
1978                 if ($contact['uid'] != 0) {
1979                         return;
1980                 }
1981
1982                 // Update contact data for all users
1983                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1984
1985                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1986                 self::update($fields, $condition);
1987
1988                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1989                 $condition['network'] = Protocol::OSTATUS;
1990
1991                 // If the contact failed, propagate the update fields to all contacts
1992                 if (empty($fields['failed'])) {
1993                         unset($fields['last-update']);
1994                         unset($fields['success_update']);
1995                         unset($fields['failure_update']);
1996                 }
1997
1998                 if (empty($fields)) {
1999                         return;
2000                 }
2001
2002                 self::update($fields, $condition);
2003         }
2004
2005         /**
2006          * Remove duplicated contacts
2007          *
2008          * @param string  $nurl  Normalised contact url
2009          * @param integer $uid   User id
2010          * @return boolean
2011          * @throws \Exception
2012          */
2013         public static function removeDuplicates(string $nurl, int $uid)
2014         {
2015                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2016                 $count = DBA::count('contact', $condition);
2017                 if ($count <= 1) {
2018                         return false;
2019                 }
2020
2021                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2022                 if (!DBA::isResult($first_contact)) {
2023                         // Shouldn't happen - so we handle it
2024                         return false;
2025                 }
2026
2027                 $first = $first_contact['id'];
2028                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2029                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2030                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2031                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2032                         return false;
2033                 }
2034
2035                 // Find all duplicates
2036                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2037                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2038                 while ($duplicate = DBA::fetch($duplicates)) {
2039                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2040                                 continue;
2041                         }
2042
2043                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2044                 }
2045                 DBA::close($duplicates);
2046                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2047                 return true;
2048         }
2049
2050         /**
2051          * @param integer $id      contact id
2052          * @param string  $network Optional network we are probing for
2053          * @return boolean
2054          * @throws HTTPException\InternalServerErrorException
2055          * @throws \ImagickException
2056          */
2057         public static function updateFromProbe(int $id, string $network = '')
2058         {
2059                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2060                 if (!DBA::isResult($contact)) {
2061                         return false;
2062                 }
2063
2064                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2065                 return self::updateFromProbeArray($id, $ret);
2066         }
2067
2068         /**
2069          * @param integer $id      contact id
2070          * @param array   $ret     Probed data
2071          * @return boolean
2072          * @throws HTTPException\InternalServerErrorException
2073          * @throws \ImagickException
2074          */
2075         private static function updateFromProbeArray(int $id, array $ret)
2076         {
2077                 /*
2078                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2079                   This will reliably kill your communication with old Friendica contacts.
2080                  */
2081
2082                 // These fields aren't updated by this routine:
2083                 // 'sensitive'
2084
2085                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2086                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2087                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2088                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2089                 if (!DBA::isResult($contact)) {
2090                         return false;
2091                 }
2092
2093                 if (self::isLocal($ret['url'])) {
2094                         if ($contact['uid'] == 0) {
2095                                 Logger::info('Local contacts are not updated here.');
2096                         } else {
2097                                 self::updateFromPublicContact($id, $contact);
2098                         }
2099                         return true;
2100                 }
2101
2102                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2103                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2104                         self::remove($id);
2105
2106                         // Delete all contacts with the same URL
2107                         self::deleteContactByUrl($ret['url']);
2108                         return true;
2109                 }
2110
2111                 $uid = $contact['uid'];
2112                 unset($contact['uid']);
2113
2114                 $uriid = $contact['uri-id'];
2115                 unset($contact['uri-id']);
2116
2117                 $pubkey = $contact['pubkey'];
2118                 unset($contact['pubkey']);
2119
2120                 $contact['photo'] = $contact['avatar'];
2121                 unset($contact['avatar']);
2122
2123                 $updated = DateTimeFormat::utcNow();
2124
2125                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2126                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2127                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2128                         return false;
2129                 }
2130
2131                 // We must not try to update relay contacts via probe. They are no real contacts.
2132                 // We check after the probing to be able to correct falsely detected contact types.
2133                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2134                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2135                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2136                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2137                         return true;
2138                 }
2139
2140                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2141                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2142                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2143                         return false;
2144                 }
2145
2146                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2147                         $cid = self::getIdForURL($ret['url'], 0, false);
2148                         if (!empty($cid) && ($cid != $id)) {
2149                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2150                                 return self::updateFromProbeArray($cid, $ret);
2151                         }
2152                 }
2153
2154                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2155                         $ret['unsearchable'] = $ret['hide'];
2156                 }
2157
2158                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2159                         $ret['forum'] = false;
2160                         $ret['prv'] = false;
2161                         $ret['contact-type'] = $ret['account-type'];
2162                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2163                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2164                                 $ret['prv'] = (bool)!$ret['forum'];
2165                         }
2166                 }
2167
2168                 $new_pubkey = $ret['pubkey'] ?? '';
2169
2170                 if ($uid == 0) {
2171                         $ret['last-item'] = Probe::getLastUpdate($ret);
2172                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2173                 }
2174
2175                 $update = false;
2176                 $guid = $ret['guid'] ?? '';
2177
2178                 // make sure to not overwrite existing values with blank entries except some technical fields
2179                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2180                 foreach ($ret as $key => $val) {
2181                         if (!array_key_exists($key, $contact)) {
2182                                 unset($ret[$key]);
2183                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2184                                 $ret[$key] = $contact[$key];
2185                         } elseif ($ret[$key] != $contact[$key]) {
2186                                 $update = true;
2187                         }
2188                 }
2189
2190                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2191                         $update = true;
2192                 } else {
2193                         unset($ret['last-item']);
2194                 }
2195
2196                 if (empty($uriid)) {
2197                         $update = true;
2198                 }
2199
2200                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2201                         self::updateAvatar($id, $ret['photo'], $update);
2202                 }
2203
2204                 if (!$update) {
2205                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2206
2207                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2208                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2209                         }
2210
2211                         // Update the public contact
2212                         if ($uid != 0) {
2213                                 $contact = self::getByURL($ret['url'], false, ['id']);
2214                                 if (!empty($contact['id'])) {
2215                                         self::updateFromProbeArray($contact['id'], $ret);
2216                                 }
2217                         }
2218
2219                         return true;
2220                 }
2221
2222                 if (empty($guid)) {
2223                         $ret['uri-id'] = ItemURI::getIdByURI($ret['url']);
2224                 } else {
2225                         $ret['uri-id'] = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2226                 }
2227
2228                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2229                 $ret['updated'] = $updated;
2230                 $ret['failed']  = false;
2231
2232                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2233                 if (empty($pubkey) && !empty($new_pubkey)) {
2234                         $ret['pubkey'] = $new_pubkey;
2235                 }
2236
2237                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2238                         $ret['uri-date'] = $updated;
2239                 }
2240
2241                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2242                         $ret['name-date'] = $updated;
2243                 }
2244
2245                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2246                         $ret['last-update'] = $updated;
2247                         $ret['success_update'] = $updated;
2248                 }
2249
2250                 unset($ret['photo']);
2251
2252                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2253
2254                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2255                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2256                 }
2257
2258                 return true;
2259         }
2260
2261         private static function updateFromPublicContact(int $id, array $contact)
2262         {
2263                 $public = self::getByURL($contact['url'], false);
2264
2265                 $fields = [];
2266
2267                 foreach ($contact as $field => $value) {
2268                         if ($field == 'uid') {
2269                                 continue;
2270                         }
2271                         if ($public[$field] != $value) {
2272                                 $fields[$field] = $public[$field];
2273                         }
2274                 }
2275                 if (!empty($fields)) {
2276                         self::update($fields, ['id' => $id, 'self' => false]);
2277                         Logger::info('Updating local contact', ['id' => $id]);
2278                 }
2279         }
2280
2281         /**
2282          * @param integer $url contact url
2283          * @return integer Contact id
2284          * @throws HTTPException\InternalServerErrorException
2285          * @throws \ImagickException
2286          */
2287         public static function updateFromProbeByURL($url)
2288         {
2289                 $id = self::getIdForURL($url);
2290
2291                 if (empty($id)) {
2292                         return $id;
2293                 }
2294
2295                 self::updateFromProbe($id);
2296
2297                 return $id;
2298         }
2299
2300         /**
2301          * Detects the communication protocol for a given contact url.
2302          * This is used to detect Friendica contacts that we can communicate via AP.
2303          *
2304          * @param string $url contact url
2305          * @param string $network Network of that contact
2306          * @return string with protocol
2307          */
2308         public static function getProtocol($url, $network)
2309         {
2310                 if ($network != Protocol::DFRN) {
2311                         return $network;
2312                 }
2313
2314                 $apcontact = APContact::getByURL($url);
2315                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2316                         return Protocol::ACTIVITYPUB;
2317                 } else {
2318                         return $network;
2319                 }
2320         }
2321
2322         /**
2323          * Takes a $uid and a url/handle and adds a new contact
2324          *
2325          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2326          * dfrn_request page.
2327          *
2328          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2329          *
2330          * Returns an array
2331          * $return['success'] boolean true if successful
2332          * $return['message'] error text if success is false.
2333          *
2334          * Takes a $uid and a url/handle and adds a new contact
2335          *
2336          * @param int    $uid         The user id the contact should be created for
2337          * @param string $url         The profile URL of the contact
2338          * @param string $network
2339          * @return array
2340          * @throws HTTPException\InternalServerErrorException
2341          * @throws HTTPException\NotFoundException
2342          * @throws \ImagickException
2343          */
2344         public static function createFromProbeForUser(int $uid, $url, $network = '')
2345         {
2346                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2347
2348                 // remove ajax junk, e.g. Twitter
2349                 $url = str_replace('/#!/', '/', $url);
2350
2351                 if (!Network::isUrlAllowed($url)) {
2352                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2353                         return $result;
2354                 }
2355
2356                 if (Network::isUrlBlocked($url)) {
2357                         $result['message'] = DI::l10n()->t('Blocked domain');
2358                         return $result;
2359                 }
2360
2361                 if (!$url) {
2362                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2363                         return $result;
2364                 }
2365
2366                 $arr = ['url' => $url, 'contact' => []];
2367
2368                 Hook::callAll('follow', $arr);
2369
2370                 if (empty($arr)) {
2371                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2372                         return $result;
2373                 }
2374
2375                 if (!empty($arr['contact']['name'])) {
2376                         $probed = false;
2377                         $ret = $arr['contact'];
2378                 } else {
2379                         $probed = true;
2380                         $ret = Probe::uri($url, $network, $uid);
2381                 }
2382
2383                 if (($network != '') && ($ret['network'] != $network)) {
2384                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2385                         return $result;
2386                 }
2387
2388                 // check if we already have a contact
2389                 // the poll url is more reliable than the profile url, as we may have
2390                 // indirect links or webfinger links
2391
2392                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2393                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2394                 if (!DBA::isResult($contact)) {
2395                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2396                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2397                 }
2398
2399                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2400
2401                 // This extra param just confuses things, remove it
2402                 if ($protocol === Protocol::DIASPORA) {
2403                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2404                 }
2405
2406                 // do we have enough information?
2407                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2408                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2409                         if (empty($ret['poll'])) {
2410                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2411                         }
2412                         if (empty($ret['name'])) {
2413                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2414                         }
2415                         if (empty($ret['url'])) {
2416                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2417                         }
2418                         if (strpos($ret['url'], '@') !== false) {
2419                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2420                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2421                         }
2422                         return $result;
2423                 }
2424
2425                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2426                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2427                         $ret['notify'] = '';
2428                 }
2429
2430                 if (!$ret['notify']) {
2431                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2432                 }
2433
2434                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2435
2436                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2437
2438                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2439
2440                 $pending = false;
2441                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2442                         $pending = (bool)$ret['manually-approve'];
2443                 }
2444
2445                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2446                         $writeable = 1;
2447                 }
2448
2449                 if (DBA::isResult($contact)) {
2450                         // update contact
2451                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2452
2453                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2454                         self::update($fields, ['id' => $contact['id']]);
2455                 } else {
2456                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2457
2458                         // create contact record
2459                         self::insert([
2460                                 'uid'     => $uid,
2461                                 'created' => DateTimeFormat::utcNow(),
2462                                 'url'     => $ret['url'],
2463                                 'nurl'    => Strings::normaliseLink($ret['url']),
2464                                 'addr'    => $ret['addr'],
2465                                 'alias'   => $ret['alias'],
2466                                 'batch'   => $ret['batch'],
2467                                 'notify'  => $ret['notify'],
2468                                 'poll'    => $ret['poll'],
2469                                 'poco'    => $ret['poco'],
2470                                 'name'    => $ret['name'],
2471                                 'nick'    => $ret['nick'],
2472                                 'network' => $ret['network'],
2473                                 'baseurl' => $ret['baseurl'],
2474                                 'gsid'    => $ret['gsid'] ?? null,
2475                                 'protocol' => $protocol,
2476                                 'pubkey'  => $ret['pubkey'],
2477                                 'rel'     => $new_relation,
2478                                 'priority'=> $ret['priority'],
2479                                 'writable'=> $writeable,
2480                                 'hidden'  => $hidden,
2481                                 'blocked' => 0,
2482                                 'readonly'=> 0,
2483                                 'pending' => $pending,
2484                                 'subhub'  => $subhub
2485                         ]);
2486                 }
2487
2488                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2489                 if (!DBA::isResult($contact)) {
2490                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2491                         return $result;
2492                 }
2493
2494                 $contact_id = $contact['id'];
2495                 $result['cid'] = $contact_id;
2496
2497                 Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact_id);
2498
2499                 // Update the avatar
2500                 self::updateAvatar($contact_id, $ret['photo']);
2501
2502                 // pull feed and consume it, which should subscribe to the hub.
2503                 if ($contact['network'] == Protocol::OSTATUS) {
2504                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2505                 }
2506
2507                 if ($probed) {
2508                         self::updateFromProbeArray($contact_id, $ret);
2509                 } else {
2510                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2511                 }
2512
2513                 $owner = User::getOwnerDataById($uid);
2514
2515                 if (DBA::isResult($owner)) {
2516                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2517                                 // create a follow slap
2518                                 $item = [];
2519                                 $item['verb'] = Activity::FOLLOW;
2520                                 $item['gravity'] = GRAVITY_ACTIVITY;
2521                                 $item['follow'] = $contact["url"];
2522                                 $item['body'] = '';
2523                                 $item['title'] = '';
2524                                 $item['guid'] = '';
2525                                 $item['uri-id'] = 0;
2526
2527                                 $slap = OStatus::salmon($item, $owner);
2528
2529                                 if (!empty($contact['notify'])) {
2530                                         Salmon::slapper($owner, $contact['notify'], $slap);
2531                                 }
2532                         } elseif ($protocol == Protocol::DIASPORA) {
2533                                 $ret = Diaspora::sendShare($owner, $contact);
2534                                 Logger::log('share returns: ' . $ret);
2535                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2536                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2537                                 if (empty($activity_id)) {
2538                                         // This really should never happen
2539                                         return false;
2540                                 }
2541
2542                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $uid, $activity_id);
2543                                 Logger::log('Follow returns: ' . $ret);
2544                         }
2545                 }
2546
2547                 $result['success'] = true;
2548                 return $result;
2549         }
2550
2551         /**
2552          * Updated contact's SSL policy
2553          *
2554          * @param array  $contact    Contact array
2555          * @param string $new_policy New policy, valid: self,full
2556          *
2557          * @return array Contact array with updated values
2558          * @throws \Exception
2559          */
2560         public static function updateSslPolicy(array $contact, $new_policy)
2561         {
2562                 $ssl_changed = false;
2563                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2564                         $ssl_changed = true;
2565                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2566                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2567                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2568                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2569                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2570                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2571                 }
2572
2573                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2574                         $ssl_changed = true;
2575                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2576                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2577                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2578                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2579                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2580                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2581                 }
2582
2583                 if ($ssl_changed) {
2584                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2585                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2586                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2587                         self::update($fields, ['id' => $contact['id']]);
2588                 }
2589
2590                 return $contact;
2591         }
2592
2593         /**
2594          * Follow a contact
2595          *
2596          * @param int $cid Public contact id
2597          * @param int $uid  User ID
2598          *
2599          * @return bool "true" if following had been successful
2600          */
2601         public static function follow(int $cid, int $uid)
2602         {
2603                 $contact = self::getById($cid, ['url']);
2604
2605                 $result = self::createFromProbeForUser($uid, $contact['url']);
2606
2607                 return $result['cid'];
2608         }
2609
2610         /**
2611          * Unfollow a contact
2612          *
2613          * @param int $cid Public contact id
2614          * @param int $uid  User ID
2615          *
2616          * @return bool "true" if unfollowing had been successful
2617          */
2618         public static function unfollow(int $cid, int $uid)
2619         {
2620                 $cdata = self::getPublicAndUserContactID($cid, $uid);
2621                 if (empty($cdata['user'])) {
2622                         return false;
2623                 }
2624
2625                 $contact = self::getById($cdata['user']);
2626
2627                 self::removeSharer([], $contact);
2628
2629                 return true;
2630         }
2631
2632         /**
2633          * @param array  $importer Owner (local user) data
2634          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2635          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2636          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2637          * @param string $note     Introduction additional message
2638          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2639          * @throws HTTPException\InternalServerErrorException
2640          * @throws \ImagickException
2641          */
2642         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2643         {
2644                 // Should always be set
2645                 if (empty($datarray['author-id'])) {
2646                         return false;
2647                 }
2648
2649                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2650                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2651                 if (!DBA::isResult($pub_contact)) {
2652                         // Should never happen
2653                         return false;
2654                 }
2655
2656                 // Contact is blocked at node-level
2657                 if (self::isBlocked($datarray['author-id'])) {
2658                         return false;
2659                 }
2660
2661                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2662                 $name = $pub_contact['name'];
2663                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2664                 $nick = $pub_contact['nick'];
2665                 $network = $pub_contact['network'];
2666
2667                 // Ensure that we don't create a new contact when there already is one
2668                 $cid = self::getIdForURL($url, $importer['uid']);
2669                 if (!empty($cid)) {
2670                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2671                 }
2672
2673                 if (!empty($contact)) {
2674                         if (!empty($contact['pending'])) {
2675                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2676                                 return null;
2677                         }
2678
2679                         // Contact is blocked at user-level
2680                         if (!empty($contact['id']) && !empty($importer['id']) &&
2681                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2682                                 return false;
2683                         }
2684
2685                         // Make sure that the existing contact isn't archived
2686                         self::unmarkForArchival($contact);
2687
2688                         if (($contact['rel'] == self::SHARING)
2689                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2690                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2691                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2692                         }
2693
2694                         // Ensure to always have the correct network type, independent from the connection request method
2695                         self::updateFromProbe($contact['id']);
2696
2697                         Post\UserNotification::insertNotication($contact['id'], Verb::getID(Activity::FOLLOW), $importer['uid']);
2698
2699                         return true;
2700                 } else {
2701                         // send email notification to owner?
2702                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2703                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2704                                 return null;
2705                         }
2706
2707                         // create contact record
2708                         $contact_id = self::insert([
2709                                 'uid'      => $importer['uid'],
2710                                 'created'  => DateTimeFormat::utcNow(),
2711                                 'url'      => $url,
2712                                 'nurl'     => Strings::normaliseLink($url),
2713                                 'name'     => $name,
2714                                 'nick'     => $nick,
2715                                 'network'  => $network,
2716                                 'rel'      => self::FOLLOWER,
2717                                 'blocked'  => 0,
2718                                 'readonly' => 0,
2719                                 'pending'  => 1,
2720                                 'writable' => 1,
2721                         ]);
2722
2723                         // Ensure to always have the correct network type, independent from the connection request method
2724                         self::updateFromProbe($contact_id);
2725
2726                         self::updateAvatar($contact_id, $photo, true);
2727
2728                         Post\UserNotification::insertNotication($contact_id, Verb::getID(Activity::FOLLOW), $importer['uid']);
2729
2730                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2731
2732                         /// @TODO Encapsulate this into a function/method
2733                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2734                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2735                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2736                                 // create notification
2737                                 $hash = Strings::getRandomHex();
2738
2739                                 if (is_array($contact_record)) {
2740                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2741                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2742                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2743                                 }
2744
2745                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2746
2747                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2748                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2749
2750                                         notification([
2751                                                 'type'  => Notification\Type::INTRO,
2752                                                 'otype' => Notification\ObjectType::INTRO,
2753                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2754                                                 'uid'   => $user['uid'],
2755                                                 'cid'   => $contact_record['id'],
2756                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2757                                         ]);
2758                                 }
2759                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2760                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2761                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2762                                 }
2763
2764                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2765                                 $fields = ['pending' => false];
2766                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2767                                         $fields['rel'] = self::FRIEND;
2768                                 }
2769
2770                                 self::update($fields, $condition);
2771
2772                                 return true;
2773                         }
2774                 }
2775
2776                 return null;
2777         }
2778
2779         public static function removeFollower($importer, $contact)
2780         {
2781                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2782                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
2783                 } else {
2784                         self::remove($contact['id']);
2785                 }
2786         }
2787
2788         public static function removeSharer($importer, $contact)
2789         {
2790                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2791                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2792                 } else {
2793                         self::remove($contact['id']);
2794                 }
2795         }
2796
2797         /**
2798          * Create a birthday event.
2799          *
2800          * Update the year and the birthday.
2801          */
2802         public static function updateBirthdays()
2803         {
2804                 $condition = [
2805                         '`bd` > ?
2806                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2807                         AND NOT `contact`.`pending`
2808                         AND NOT `contact`.`hidden`
2809                         AND NOT `contact`.`blocked`
2810                         AND NOT `contact`.`archive`
2811                         AND NOT `contact`.`deleted`',
2812                         DBA::NULL_DATE,
2813                         self::SHARING,
2814                         self::FRIEND
2815                 ];
2816
2817                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2818
2819                 while ($contact = DBA::fetch($contacts)) {
2820                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2821
2822                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2823
2824                         if (Event::createBirthday($contact, $nextbd)) {
2825                                 // update bdyear
2826                                 DBA::update(
2827                                         'contact',
2828                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2829                                         ['id' => $contact['id']]
2830                                 );
2831                         }
2832                 }
2833                 DBA::close($contacts);
2834         }
2835
2836         /**
2837          * Remove the unavailable contact ids from the provided list
2838          *
2839          * @param array $contact_ids Contact id list
2840          * @return array
2841          * @throws \Exception
2842          */
2843         public static function pruneUnavailable(array $contact_ids)
2844         {
2845                 if (empty($contact_ids)) {
2846                         return [];
2847                 }
2848
2849                 $contacts = self::selectToArray(['id'], [
2850                         'id'      => $contact_ids,
2851                         'blocked' => false,
2852                         'pending' => false,
2853                         'archive' => false,
2854                 ]);
2855
2856                 return array_column($contacts, 'id');
2857         }
2858
2859         /**
2860          * Returns a magic link to authenticate remote visitors
2861          *
2862          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2863          *
2864          * @param string $contact_url The address of the target contact profile
2865          * @param string $url         An url that we will be redirected to after the authentication
2866          *
2867          * @return string with "redir" link
2868          * @throws HTTPException\InternalServerErrorException
2869          * @throws \ImagickException
2870          */
2871         public static function magicLink($contact_url, $url = '')
2872         {
2873                 if (!Session::isAuthenticated()) {
2874                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2875                 }
2876
2877                 $contact = self::getByURL($contact_url, false);
2878                 if (empty($contact)) {
2879                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2880                 }
2881
2882                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2883                 unset($contact['uid']);
2884
2885                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2886         }
2887
2888         /**
2889          * Returns a magic link to authenticate remote visitors
2890          *
2891          * @param integer $cid The contact id of the target contact profile
2892          * @param string  $url An url that we will be redirected to after the authentication
2893          *
2894          * @return string with "redir" link
2895          * @throws HTTPException\InternalServerErrorException
2896          * @throws \ImagickException
2897          */
2898         public static function magicLinkById($cid, $url = '')
2899         {
2900                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2901
2902                 return self::magicLinkByContact($contact, $url);
2903         }
2904
2905         /**
2906          * Returns a magic link to authenticate remote visitors
2907          *
2908          * @param array  $contact The contact array with "uid", "network" and "url"
2909          * @param string $url     An url that we will be redirected to after the authentication
2910          *
2911          * @return string with "redir" link
2912          * @throws HTTPException\InternalServerErrorException
2913          * @throws \ImagickException
2914          */
2915         public static function magicLinkByContact($contact, $url = '')
2916         {
2917                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2918
2919                 if (!Session::isAuthenticated()) {
2920                         return $destination;
2921                 }
2922
2923                 // Only redirections to the same host do make sense
2924                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2925                         return $url;
2926                 }
2927
2928                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2929                         return 'contact/' . $contact['id'] . '/conversations';
2930                 }
2931
2932                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2933                         return $destination;
2934                 }
2935
2936                 if (empty($contact['id'])) {
2937                         return $destination;
2938                 }
2939
2940                 $redirect = 'redir/' . $contact['id'];
2941
2942                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2943                         $redirect .= '?url=' . $url;
2944                 }
2945
2946                 return $redirect;
2947         }
2948
2949         /**
2950          * Is the contact a forum?
2951          *
2952          * @param integer $contactid ID of the contact
2953          *
2954          * @return boolean "true" if it is a forum
2955          */
2956         public static function isForum($contactid)
2957         {
2958                 $fields = ['forum', 'prv'];
2959                 $condition = ['id' => $contactid];
2960                 $contact = DBA::selectFirst('contact', $fields, $condition);
2961                 if (!DBA::isResult($contact)) {
2962                         return false;
2963                 }
2964
2965                 // Is it a forum?
2966                 return ($contact['forum'] || $contact['prv']);
2967         }
2968
2969         /**
2970          * Can the remote contact receive private messages?
2971          *
2972          * @param array $contact
2973          * @return bool
2974          */
2975         public static function canReceivePrivateMessages(array $contact)
2976         {
2977                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2978                 $self = $contact['self'] ?? false;
2979
2980                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2981         }
2982
2983         /**
2984          * Search contact table by nick or name
2985          *
2986          * @param string $search Name or nick
2987          * @param string $mode   Search mode (e.g. "community")
2988          * @param int    $uid    User ID
2989          *
2990          * @return array with search results
2991          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2992          */
2993         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2994         {
2995                 if (empty($search)) {
2996                         return [];
2997                 }
2998
2999                 // check supported networks
3000                 if (DI::config()->get('system', 'diaspora_enabled')) {
3001                         $diaspora = Protocol::DIASPORA;
3002                 } else {
3003                         $diaspora = Protocol::DFRN;
3004                 }
3005
3006                 if (!DI::config()->get('system', 'ostatus_disabled')) {
3007                         $ostatus = Protocol::OSTATUS;
3008                 } else {
3009                         $ostatus = Protocol::DFRN;
3010                 }
3011
3012                 // check if we search only communities or every contact
3013                 if ($mode === 'community') {
3014                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
3015                 } else {
3016                         $extra_sql = '';
3017                 }
3018
3019                 $search .= '%';
3020
3021                 $results = DBA::p("SELECT * FROM `contact`
3022                         WHERE (NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` where `publish` OR `net-publish`))
3023                                 AND `network` IN (?, ?, ?, ?) AND
3024                                 NOT `failed` AND `uid` = ? AND
3025                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
3026                                 ORDER BY `nurl` DESC LIMIT 1000",
3027                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $uid, $search, $search, $search
3028                 );
3029
3030                 $contacts = DBA::toArray($results);
3031                 return $contacts;
3032         }
3033
3034         /**
3035          * Add public contacts from an array
3036          *
3037          * @param array $urls
3038          * @return array result "count", "added" and "updated"
3039          */
3040         public static function addByUrls(array $urls)
3041         {
3042                 $added = 0;
3043                 $updated = 0;
3044                 $unchanged = 0;
3045                 $count = 0;
3046
3047                 foreach ($urls as $url) {
3048                         if (empty($url) || !is_string($url)) {
3049                                 continue;
3050                         }
3051                         $contact = self::getByURL($url, false, ['id', 'updated']);
3052                         if (empty($contact['id'])) {
3053                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3054                                 ++$added;
3055                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3056                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3057                                 ++$updated;
3058                         } else {
3059                                 ++$unchanged;
3060                         }
3061                         ++$count;
3062                 }
3063
3064                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3065         }
3066
3067         /**
3068          * Returns a random, global contact array of the current node
3069          *
3070          * @return array The profile array
3071          * @throws Exception
3072          */
3073         public static function getRandomContact()
3074         {
3075                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3076                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3077                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3078                 ], ['order' => ['RAND()']]);
3079
3080                 if (DBA::isResult($contact)) {
3081                         return $contact;
3082                 }
3083
3084                 return [];
3085         }
3086 }