src/Model/Contact.php

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