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) && !self::isLegacyDFRNContact($contact)) {
 815                         $protocol = Protocol::ACTIVITYPUB;
 816                 }
 817
 818                 if (($protocol == Protocol::DFRN) && $dissolve) {
 819                         DFRN::deliver($user, $contact, 'placeholder', true);
 820                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 821                         // create an unfollow slap
 822                         $item = [];
 823                         $item['verb'] = Activity::O_UNFOLLOW;
 824                         $item['gravity'] = GRAVITY_ACTIVITY;
 825                         $item['follow'] = $contact["url"];
 826                         $item['body'] = '';
 827                         $item['title'] = '';
 828                         $item['guid'] = '';
 829                         $item['uri-id'] = 0;
 830                         $slap = OStatus::salmon($item, $user);
 831
 832                         if (!empty($contact['notify'])) {
 833                                 Salmon::slapper($user, $contact['notify'], $slap);
 834                         }
 835                 } elseif ($protocol == Protocol::DIASPORA) {
 836                         Diaspora::sendUnshare($user, $contact);
 837                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 838                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 839
 840                         if ($dissolve) {
 841                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 842                         }
 843                 }
 844         }
 845
 846         /**
 847          * Marks a contact for archival after a communication issue delay
 848          *
 849          * Contact has refused to recognise us as a friend. We will start a countdown.
 850          * If they still don't recognise us in 32 days, the relationship is over,
 851          * and we won't waste any more time trying to communicate with them.
 852          * This provides for the possibility that their database is temporarily messed
 853          * up or some other transient event and that there's a possibility we could recover from it.
 854          *
 855          * @param array $contact contact to mark for archival
 856          * @return null
 857          * @throws HTTPException\InternalServerErrorException
 858          */
 859         public static function markForArchival(array $contact)
 860         {
 861                 if (!isset($contact['url']) && !empty($contact['id'])) {
 862                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 863                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 864                         if (!DBA::isResult($contact)) {
 865                                 return;
 866                         }
 867                 } elseif (!isset($contact['url'])) {
 868                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 869                 }
 870
 871                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 872
 873                 // Contact already archived or "self" contact? => nothing to do
 874                 if ($contact['archive'] || $contact['self']) {
 875                         return;
 876                 }
 877
 878                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 879                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 880                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 881                 } else {
 882                         /* @todo
 883                          * We really should send a notification to the owner after 2-3 weeks
 884                          * so they won't be surprised when the contact vanishes and can take
 885                          * remedial action if this was a serious mistake or glitch
 886                          */
 887
 888                         /// @todo Check for contact vitality via probing
 889                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 890
 891                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 892                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 893                                 /* Relationship is really truly dead. archive them rather than
 894                                  * delete, though if the owner tries to unarchive them we'll start
 895                                  * the whole process over again.
 896                                  */
 897                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 898                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 899                         }
 900                 }
 901         }
 902
 903         /**
 904          * Cancels the archival countdown
 905          *
 906          * @see   Contact::markForArchival()
 907          *
 908          * @param array $contact contact to be unmarked for archival
 909          * @return null
 910          * @throws \Exception
 911          */
 912         public static function unmarkForArchival(array $contact)
 913         {
 914                 // Always unarchive the relay contact entry
 915                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 916                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 917                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 918                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 919                                 DBA::update('contact', $fields, $condition);
 920                         }
 921                 }
 922
 923                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 924                 $exists = DBA::exists('contact', $condition);
 925
 926                 // We don't need to update, we never marked this contact for archival
 927                 if (!$exists) {
 928                         return;
 929                 }
 930
 931                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 932
 933                 if (!isset($contact['url']) && !empty($contact['id'])) {
 934                         $fields = ['id', 'url', 'batch'];
 935                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 936                         if (!DBA::isResult($contact)) {
 937                                 return;
 938                         }
 939                 }
 940
 941                 // It's a miracle. Our dead contact has inexplicably come back to life.
 942                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 943                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 944                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 945         }
 946
 947         /**
 948          * Returns the data array for the photo menu of a given contact
 949          *
 950          * @param array $contact contact
 951          * @param int   $uid     optional, default 0
 952          * @return array
 953          * @throws HTTPException\InternalServerErrorException
 954          * @throws \ImagickException
 955          */
 956         public static function photoMenu(array $contact, $uid = 0)
 957         {
 958                 $pm_url = '';
 959                 $status_link = '';
 960                 $photos_link = '';
 961                 $contact_drop_link = '';
 962                 $poke_link = '';
 963
 964                 if ($uid == 0) {
 965                         $uid = local_user();
 966                 }
 967
 968                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 969                         if ($uid == 0) {
 970                                 $profile_link = self::magicLinkByContact($contact);
 971                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 972
 973                                 return $menu;
 974                         }
 975
 976                         // Look for our own contact if the uid doesn't match and isn't public
 977                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 978                         if (DBA::isResult($contact_own)) {
 979                                 return self::photoMenu($contact_own, $uid);
 980                         }
 981                 }
 982
 983                 $sparkle = false;
 984                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 985                         $sparkle = true;
 986                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 987                 } else {
 988                         $profile_link = $contact['url'];
 989                 }
 990
 991                 if ($profile_link === 'mailbox') {
 992                         $profile_link = '';
 993                 }
 994
 995                 if ($sparkle) {
 996                         $status_link = $profile_link . '/status';
 997                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 998                         $profile_link = $profile_link . '/profile';
 999                 }
1000
1001                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1002                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1003                 }
1004
1005                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1006                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1007                 }
1008
1009                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1010
1011                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1012
1013                 if (!$contact['self']) {
1014                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
1015                 }
1016
1017                 $follow_link = '';
1018                 $unfollow_link = '';
1019                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
1020                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1021                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1022                         } elseif(!$contact['pending']) {
1023                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1024                         }
1025                 }
1026
1027                 if (!empty($follow_link) || !empty($unfollow_link)) {
1028                         $contact_drop_link = '';
1029                 }
1030
1031                 /**
1032                  * Menu array:
1033                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1034                  */
1035                 if (empty($contact['uid'])) {
1036                         $menu = [
1037                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1038                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1039                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1040                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1041                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1042                         ];
1043                 } else {
1044                         $menu = [
1045                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1046                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1047                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1048                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1049                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1050                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1051                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1052                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1053                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1054                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1055                         ];
1056
1057                         if (!empty($contact['pending'])) {
1058                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1059                                 if (DBA::isResult($intro)) {
1060                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1061                                 }
1062                         }
1063                 }
1064
1065                 $args = ['contact' => $contact, 'menu' => &$menu];
1066
1067                 Hook::callAll('contact_photo_menu', $args);
1068
1069                 $menucondensed = [];
1070
1071                 foreach ($menu as $menuname => $menuitem) {
1072                         if ($menuitem[1] != '') {
1073                                 $menucondensed[$menuname] = $menuitem;
1074                         }
1075                 }
1076
1077                 return $menucondensed;
1078         }
1079
1080         /**
1081          * Fetch the contact id for a given URL and user
1082          *
1083          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1084          * `addr` or `alias`.
1085          *
1086          * If there's no record and we aren't looking for a public contact, we quit.
1087          * If there's one, we check that it isn't time to update the picture else we
1088          * directly return the found contact id.
1089          *
1090          * Second, we probe the provided $url whether it's http://server.tld/profile or
1091          * nick@server.tld. We quit if we can't get any info back.
1092          *
1093          * Third, we create the contact record if it doesn't exist
1094          *
1095          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1096          * if there's any updates
1097          *
1098          * @param string  $url       Contact URL
1099          * @param integer $uid       The user id for the contact (0 = public contact)
1100          * @param boolean $update    true = always update, false = never update, null = update when not found
1101          * @param array   $default   Default value for creating the contact when everything else fails
1102          *
1103          * @return integer Contact ID
1104          * @throws HTTPException\InternalServerErrorException
1105          * @throws \ImagickException
1106          */
1107         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1108         {
1109                 $contact_id = 0;
1110
1111                 if ($url == '') {
1112                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1113                         return 0;
1114                 }
1115
1116                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1117
1118                 if (!empty($contact)) {
1119                         $contact_id = $contact["id"];
1120
1121                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1122                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1123                                 return $contact_id;
1124                         }
1125                 } elseif ($uid != 0) {
1126                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1127                         return 0;
1128                 } elseif (empty($default) && !is_null($update) && !$update) {
1129                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1130                         return 0;
1131                 }
1132
1133                 $data = [];
1134
1135                 if (empty($default['network']) || $update) {
1136                         $data = Probe::uri($url, "", $uid);
1137
1138                         // Take the default values when probing failed
1139                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1140                                 $data = array_merge($data, $default);
1141                         }
1142                 } elseif (!empty($default['network'])) {
1143                         $data = $default;
1144                 }
1145
1146                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1147                         // Fetch data for the public contact via the first found personal contact
1148                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1149                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1150                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1151                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1152
1153                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1154                         if (!DBA::isResult($personal_contact)) {
1155                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1156                         }
1157
1158                         if (DBA::isResult($personal_contact)) {
1159                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1160                                 $data = $personal_contact;
1161                                 $data['photo'] = $personal_contact['avatar'];
1162                                 $data['account-type'] = $personal_contact['contact-type'];
1163                                 $data['hide'] = $personal_contact['unsearchable'];
1164                                 unset($data['avatar']);
1165                                 unset($data['contact-type']);
1166                                 unset($data['unsearchable']);
1167                         }
1168                 }
1169
1170                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1171                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1172                         return 0;
1173                 }
1174
1175                 if (!$contact_id) {
1176                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1177                         if (!empty($data['alias'])) {
1178                                 $urls[] = Strings::normaliseLink($data['alias']);
1179                         }
1180                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1181                         if (!empty($contact['id'])) {
1182                                 $contact_id = $contact['id'];
1183                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1184                         }
1185                 }
1186
1187                 if (!$contact_id) {
1188                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1189                         $fields = [
1190                                 'uid'       => $uid,
1191                                 'url'       => $data['url'],
1192                                 'nurl'      => Strings::normaliseLink($data['url']),
1193                                 'network'   => $data['network'],
1194                                 'created'   => DateTimeFormat::utcNow(),
1195                                 'rel'       => self::SHARING,
1196                                 'writable'  => 1,
1197                                 'blocked'   => 0,
1198                                 'readonly'  => 0,
1199                                 'pending'   => 0];
1200
1201                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1202
1203                         // Before inserting we do check if the entry does exist now.
1204                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1205                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1206                                 if (DBA::isResult($contact)) {
1207                                         $contact_id = $contact['id'];
1208                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1209                                 } else {
1210                                         DBA::insert('contact', $fields);
1211                                         $contact_id = DBA::lastInsertId();
1212                                         if ($contact_id) {
1213                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1214                                         }
1215                                 }
1216                                 DI::lock()->release(self::LOCK_INSERT);
1217                         } else {
1218                                 Logger::warning('Contact lock had not been acquired');
1219                         }
1220
1221                         if (!$contact_id) {
1222                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1223                                 return 0;
1224                         }
1225                 } else {
1226                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1227                 }
1228
1229                 self::updateFromProbeArray($contact_id, $data);
1230
1231                 // Don't return a number for a deleted account
1232                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1233                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1234                         return 0;
1235                 }
1236
1237                 return $contact_id;
1238         }
1239
1240         /**
1241          * Checks if the contact is archived
1242          *
1243          * @param int $cid contact id
1244          *
1245          * @return boolean Is the contact archived?
1246          * @throws HTTPException\InternalServerErrorException
1247          */
1248         public static function isArchived(int $cid)
1249         {
1250                 if ($cid == 0) {
1251                         return false;
1252                 }
1253
1254                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1255                 if (!DBA::isResult($contact)) {
1256                         return false;
1257                 }
1258
1259                 if ($contact['archive']) {
1260                         return true;
1261                 }
1262
1263                 // Check status of ActivityPub endpoints
1264                 $apcontact = APContact::getByURL($contact['url'], false);
1265                 if (!empty($apcontact)) {
1266                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1267                                 return true;
1268                         }
1269
1270                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1271                                 return true;
1272                         }
1273                 }
1274
1275                 // Check status of Diaspora endpoints
1276                 if (!empty($contact['batch'])) {
1277                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1278                         return DBA::exists('contact', $condition);
1279                 }
1280
1281                 return false;
1282         }
1283
1284         /**
1285          * Checks if the contact is blocked
1286          *
1287          * @param int $cid contact id
1288          *
1289          * @return boolean Is the contact blocked?
1290          * @throws HTTPException\InternalServerErrorException
1291          */
1292         public static function isBlocked($cid)
1293         {
1294                 if ($cid == 0) {
1295                         return false;
1296                 }
1297
1298                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1299                 if (!DBA::isResult($blocked)) {
1300                         return false;
1301                 }
1302
1303                 if (Network::isUrlBlocked($blocked['url'])) {
1304                         return true;
1305                 }
1306
1307                 return (bool) $blocked['blocked'];
1308         }
1309
1310         /**
1311          * Checks if the contact is hidden
1312          *
1313          * @param int $cid contact id
1314          *
1315          * @return boolean Is the contact hidden?
1316          * @throws \Exception
1317          */
1318         public static function isHidden($cid)
1319         {
1320                 if ($cid == 0) {
1321                         return false;
1322                 }
1323
1324                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1325                 if (!DBA::isResult($hidden)) {
1326                         return false;
1327                 }
1328                 return (bool) $hidden['hidden'];
1329         }
1330
1331         /**
1332          * Returns posts from a given contact url
1333          *
1334          * @param string $contact_url Contact URL
1335          * @param bool   $thread_mode
1336          * @param int    $update      Update mode
1337          * @param int    $parent      Item parent ID for the update mode
1338          * @return string posts in HTML
1339          * @throws \Exception
1340          */
1341         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1342         {
1343                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1344         }
1345
1346         /**
1347          * Returns posts from a given contact id
1348          *
1349          * @param int  $cid         Contact ID
1350          * @param bool $thread_mode
1351          * @param int  $update      Update mode
1352          * @param int  $parent     Item parent ID for the update mode
1353          * @return string posts in HTML
1354          * @throws \Exception
1355          */
1356         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1357         {
1358                 $a = DI::app();
1359
1360                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1361                 if (!DBA::isResult($contact)) {
1362                         return '';
1363                 }
1364
1365                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1366                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1367                 } else {
1368                         $sql = "`uid` = ?";
1369                 }
1370
1371                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1372
1373                 if ($thread_mode) {
1374                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1375                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1376                 } else {
1377                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1378                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1379                 }
1380
1381                 if (!empty($parent)) {
1382                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1383                 } else {
1384                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1385                         if (!empty($last_received)) {
1386                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1387                         }
1388                 }
1389
1390                 if (DI::mode()->isMobile()) {
1391                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1392                                 DI::config()->get('system', 'itemspage_network_mobile'));
1393                 } else {
1394                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1395                                 DI::config()->get('system', 'itemspage_network'));
1396                 }
1397
1398                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1399
1400                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1401
1402                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1403                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1404                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1405                 } else {
1406                         $o = '';
1407                 }
1408
1409                 if ($thread_mode) {
1410                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1411
1412                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1413                 } else {
1414                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1415
1416                         $o .= conversation($a, $items, 'contact-posts', $update);
1417                 }
1418
1419                 if (!$update) {
1420                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1421                                 $o .= HTML::scrollLoader();
1422                         } else {
1423                                 $o .= $pager->renderMinimal(count($items));
1424                         }
1425                 }
1426
1427                 return $o;
1428         }
1429
1430         /**
1431          * Returns the account type name
1432          *
1433          * The function can be called with either the user or the contact array
1434          *
1435          * @param array $contact contact or user array
1436          * @return string
1437          */
1438         public static function getAccountType(array $contact)
1439         {
1440                 // There are several fields that indicate that the contact or user is a forum
1441                 // "page-flags" is a field in the user table,
1442                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1443                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1444                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1445                         || (isset($contact['forum']) && intval($contact['forum']))
1446                         || (isset($contact['prv']) && intval($contact['prv']))
1447                         || (isset($contact['community']) && intval($contact['community']))
1448                 ) {
1449                         $type = self::TYPE_COMMUNITY;
1450                 } else {
1451                         $type = self::TYPE_PERSON;
1452                 }
1453
1454                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1455                 if (isset($contact["contact-type"])) {
1456                         $type = $contact["contact-type"];
1457                 }
1458
1459                 if (isset($contact["account-type"])) {
1460                         $type = $contact["account-type"];
1461                 }
1462
1463                 switch ($type) {
1464                         case self::TYPE_ORGANISATION:
1465                                 $account_type = DI::l10n()->t("Organisation");
1466                                 break;
1467
1468                         case self::TYPE_NEWS:
1469                                 $account_type = DI::l10n()->t('News');
1470                                 break;
1471
1472                         case self::TYPE_COMMUNITY:
1473                                 $account_type = DI::l10n()->t("Forum");
1474                                 break;
1475
1476                         default:
1477                                 $account_type = "";
1478                                 break;
1479                 }
1480
1481                 return $account_type;
1482         }
1483
1484         /**
1485          * Blocks a contact
1486          *
1487          * @param int $cid
1488          * @return bool
1489          * @throws \Exception
1490          */
1491         public static function block($cid, $reason = null)
1492         {
1493                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1494
1495                 return $return;
1496         }
1497
1498         /**
1499          * Unblocks a contact
1500          *
1501          * @param int $cid
1502          * @return bool
1503          * @throws \Exception
1504          */
1505         public static function unblock($cid)
1506         {
1507                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1508
1509                 return $return;
1510         }
1511
1512         /**
1513          * Ensure that cached avatar exist
1514          *
1515          * @param integer $cid
1516          */
1517         public static function checkAvatarCache(int $cid)
1518         {
1519                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1520                 if (!DBA::isResult($contact)) {
1521                         return;
1522                 }
1523
1524                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1525                         return;
1526                 }
1527
1528                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1529
1530                 self::updateAvatar($cid, $contact['avatar'], true);
1531         }
1532
1533         /**
1534          * Return the photo path for a given contact array in the given size
1535          *
1536          * @param array $contact    contact array
1537          * @param string $field     Fieldname of the photo in the contact array
1538          * @param string $size      Size of the avatar picture
1539          * @param string $avatar    Avatar path that is displayed when no photo had been found
1540          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1541          * @return string photo path
1542          */
1543         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1544         {
1545                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1546                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1547         }
1548
1549         /**
1550          * Return the photo path for a given contact array
1551          *
1552          * @param array  $contact   Contact array
1553          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1554          * @return string photo path
1555          */
1556         public static function getPhoto(array $contact, bool $no_update = false)
1557         {
1558                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1559         }
1560
1561         /**
1562          * Return the photo path (thumb size) for a given contact array
1563          *
1564          * @param array  $contact   Contact array
1565          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1566          * @return string photo path
1567          */
1568         public static function getThumb(array $contact, bool $no_update = false)
1569         {
1570                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1571         }
1572
1573         /**
1574          * Return the photo path (micro size) for a given contact array
1575          *
1576          * @param array  $contact   Contact array
1577          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1578          * @return string photo path
1579          */
1580         public static function getMicro(array $contact, bool $no_update = false)
1581         {
1582                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1583         }
1584
1585         /**
1586          * Check the given contact array for avatar cache fields
1587          *
1588          * @param array $contact
1589          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1590          * @return array contact array with avatar cache fields
1591          */
1592         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1593         {
1594                 $update = false;
1595                 $contact_fields = [];
1596                 $fields = ['photo', 'thumb', 'micro'];
1597                 foreach ($fields as $field) {
1598                         if (isset($contact[$field])) {
1599                                 $contact_fields[] = $field;
1600                         }
1601                         if (isset($contact[$field]) && empty($contact[$field])) {
1602                                 $update = true;
1603                         }
1604                 }
1605
1606                 if (!$update || $no_update) {
1607                         return $contact;
1608                 }
1609
1610                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1611                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1612
1613                         $new_contact = self::getById($contact['id'], $contact_fields);
1614                         if (DBA::isResult($new_contact)) {
1615                                 // We only update the cache fields
1616                                 $contact = array_merge($contact, $new_contact);
1617                         }
1618                 }
1619
1620                 /// add the default avatars if the fields aren't filled
1621                 if (isset($contact['photo']) && empty($contact['photo'])) {
1622                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1623                 }
1624                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1625                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1626                 }
1627                 if (isset($contact['micro']) && empty($contact['micro'])) {
1628                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1629                 }
1630
1631                 return $contact;
1632         }
1633
1634         /**
1635          * Fetch the default avatar for the given contact and size
1636          *
1637          * @param array $contact  contact array
1638          * @param string $size    Size of the avatar picture
1639          * @return string avatar URL
1640          */
1641         public static function getDefaultAvatar(array $contact, string $size)
1642         {
1643                 switch ($size) {
1644                         case Proxy::SIZE_MICRO:
1645                                 $avatar['size'] = 48;
1646                                 $default = self::DEFAULT_AVATAR_MICRO;
1647                                 break;
1648
1649                         case Proxy::SIZE_THUMB:
1650                                 $avatar['size'] = 80;
1651                                 $default = self::DEFAULT_AVATAR_THUMB;
1652                                 break;
1653
1654                         case Proxy::SIZE_SMALL:
1655                         default:
1656                                 $avatar['size'] = 300;
1657                                 $default = self::DEFAULT_AVATAR_PHOTO;
1658                                 break;
1659                 }
1660
1661                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1662                         return DI::baseUrl() . $default;
1663                 }
1664
1665                 if (!empty($contact['xmpp'])) {
1666                         $avatar['email'] = $contact['xmpp'];
1667                 } elseif (!empty($contact['addr'])) {
1668                         $avatar['email'] = $contact['addr'];
1669                 } elseif (!empty($contact['url'])) {
1670                         $avatar['email'] = $contact['url'];
1671                 } else {
1672                         return DI::baseUrl() . $default;
1673                 }
1674
1675                 $avatar['url'] = '';
1676                 $avatar['success'] = false;
1677
1678                 Hook::callAll('avatar_lookup', $avatar);
1679
1680                 if ($avatar['success'] && !empty($avatar['url'])) {
1681                         return $avatar['url'];
1682                 }
1683
1684                 return DI::baseUrl() . $default;
1685         }
1686
1687         /**
1688          * Get avatar link for given contact id
1689          *
1690          * @param integer $cid     contact id
1691          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1692          * @param string  $updated Contact update date
1693          * @return string avatar link
1694          */
1695         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = ''):string
1696         {
1697                 // We have to fetch the "updated" variable when it wasn't provided
1698                 // The parameter can be provided to improve performance
1699                 if (empty($updated)) {
1700                         $contact = self::getById($cid, ['updated']);
1701                         $updated = $contact['updated'] ?? '';
1702                 }
1703
1704                 $url = DI::baseUrl() . '/photo/contact/';
1705                 switch ($size) {
1706                         case Proxy::SIZE_MICRO:
1707                                 $url .= Proxy::PIXEL_MICRO . '/';
1708                                 break;
1709                         case Proxy::SIZE_THUMB:
1710                                 $url .= Proxy::PIXEL_THUMB . '/';
1711                                 break;
1712                         case Proxy::SIZE_SMALL:
1713                                 $url .= Proxy::PIXEL_SMALL . '/';
1714                                 break;
1715                         case Proxy::SIZE_MEDIUM:
1716                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1717                                 break;
1718                         case Proxy::SIZE_LARGE:
1719                                 $url .= Proxy::PIXEL_LARGE . '/';
1720                                 break;
1721                 }
1722                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1723         }
1724
1725         /**
1726          * Get avatar link for given contact URL
1727          *
1728          * @param string  $url  contact url
1729          * @param integer $uid  user id
1730          * @param string  $size One of the ProxyUtils::SIZE_* constants
1731          * @return string avatar link
1732          */
1733         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1734         {
1735                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1736                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1737                 $contact = self::selectFirst(['id', 'updated'], $condition);
1738                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1739         }
1740
1741         /**
1742          * Get header link for given contact id
1743          *
1744          * @param integer $cid     contact id
1745          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1746          * @param string  $updated Contact update date
1747          * @return string header link
1748          */
1749         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = ''):string
1750         {
1751                 // We have to fetch the "updated" variable when it wasn't provided
1752                 // The parameter can be provided to improve performance
1753                 if (empty($updated)) {
1754                         $contact = self::getById($cid, ['updated']);
1755                         $updated = $contact['updated'] ?? '';
1756                 }
1757
1758                 $url = DI::baseUrl() . '/photo/header/';
1759                 switch ($size) {
1760                         case Proxy::SIZE_MICRO:
1761                                 $url .= Proxy::PIXEL_MICRO . '/';
1762                                 break;
1763                         case Proxy::SIZE_THUMB:
1764                                 $url .= Proxy::PIXEL_THUMB . '/';
1765                                 break;
1766                         case Proxy::SIZE_SMALL:
1767                                 $url .= Proxy::PIXEL_SMALL . '/';
1768                                 break;
1769                         case Proxy::SIZE_MEDIUM:
1770                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1771                                 break;
1772                         case Proxy::SIZE_LARGE:
1773                                 $url .= Proxy::PIXEL_LARGE . '/';
1774                                 break;
1775                 }
1776
1777                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1778         }
1779
1780         /**
1781          * Updates the avatar links in a contact only if needed
1782          *
1783          * @param int    $cid          Contact id
1784          * @param string $avatar       Link to avatar picture
1785          * @param bool   $force        force picture update
1786          * @param bool   $create_cache Enforces the creation of cached avatar fields
1787          *
1788          * @return void
1789          * @throws HTTPException\InternalServerErrorException
1790          * @throws HTTPException\NotFoundException
1791          * @throws \ImagickException
1792          */
1793         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1794         {
1795                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1796                         ['id' => $cid, 'self' => false]);
1797                 if (!DBA::isResult($contact)) {
1798                         return;
1799                 }
1800
1801                 $uid = $contact['uid'];
1802
1803                 // Only update the cached photo links of public contacts when they already are cached
1804                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1805                         if ($contact['avatar'] != $avatar) {
1806                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1807                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1808                         }
1809                         return;
1810                 }
1811
1812                 // User contacts use are updated through the public contacts
1813                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1814                         $pcid = self::getIdForURL($contact['url'], false);
1815                         if (!empty($pcid)) {
1816                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1817                                 self::updateAvatar($pcid, $avatar, $force, true);
1818                                 return;
1819                         }
1820                 }
1821
1822                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1823
1824                 if ($default_avatar) {
1825                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1826                 }
1827
1828                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1829                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1830                                 'photo' => $avatar,
1831                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1832                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1833                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1834                 }
1835
1836                 // Use the data from the self account
1837                 if (empty($fields)) {
1838                         $local_uid = User::getIdForURL($contact['url']);
1839                         if (!empty($local_uid)) {
1840                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1841                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1842                         }
1843                 }
1844
1845                 if (empty($fields)) {
1846                         $update = ($contact['avatar'] != $avatar) || $force;
1847
1848                         if (!$update) {
1849                                 $data = [
1850                                         $contact['photo'] ?? '',
1851                                         $contact['thumb'] ?? '',
1852                                         $contact['micro'] ?? '',
1853                                 ];
1854
1855                                 foreach ($data as $image_uri) {
1856                                         $image_rid = Photo::ridFromURI($image_uri);
1857                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1858                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1859                                                 $update = true;
1860                                         }
1861                                 }
1862                         }
1863
1864                         if ($update) {
1865                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1866                                 if ($photos) {
1867                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1868                                         $update = !empty($fields);
1869                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1870                                 } else {
1871                                         $update = false;
1872                                 }
1873                         }
1874                 } else {
1875                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1876                 }
1877
1878                 if (!$update) {
1879                         return;
1880                 }
1881
1882                 $cids = [];
1883                 $uids = [];
1884                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1885                         // Collect all user contacts of the given public contact
1886                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1887                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1888                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1889                                 $cids[] = $personal_contact['id'];
1890                                 $uids[] = $personal_contact['uid'];
1891                         }
1892                         DBA::close($personal_contacts);
1893
1894                         if (!empty($cids)) {
1895                                 // Delete possibly existing cached user contact avatars
1896                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1897                         }
1898                 }
1899
1900                 $cids[] = $cid;
1901                 $uids[] = $uid;
1902                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1903                 DBA::update('contact', $fields, ['id' => $cids]);
1904         }
1905
1906         public static function deleteContactByUrl(string $url)
1907         {
1908                 // Update contact data for all users
1909                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1910                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1911                 while ($contact = DBA::fetch($contacts)) {
1912                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1913                         self::remove($contact['id']);
1914                 }
1915         }
1916
1917         /**
1918          * Helper function for "updateFromProbe". Updates personal and public contact
1919          *
1920          * @param integer $id      contact id
1921          * @param integer $uid     user id
1922          * @param string  $old_url The previous profile URL of the contact
1923          * @param string  $new_url The profile URL of the contact
1924          * @param array   $fields  The fields that are updated
1925          *
1926          * @throws \Exception
1927          */
1928         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1929         {
1930                 if (Strings::normaliseLink($new_url) != Strings::normaliseLink($old_url)) {
1931                         Logger::notice('New URL differs from old URL', ['old' => $old_url, 'new' => $new_url]);
1932                         return;
1933                 }
1934
1935                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1936                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1937                         return;
1938                 }
1939
1940                 // Search for duplicated contacts and get rid of them
1941                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1942                         return;
1943                 }
1944
1945                 // Archive or unarchive the contact.
1946                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1947                 if (!DBA::isResult($contact)) {
1948                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1949                         return;
1950                 }
1951
1952                 if (isset($fields['failed'])) {
1953                         if ($fields['failed']) {
1954                                 self::markForArchival($contact);
1955                         } else {
1956                                 self::unmarkForArchival($contact);
1957                         }
1958                 }
1959
1960                 if ($contact['uid'] != 0) {
1961                         return;
1962                 }
1963
1964                 // Update contact data for all users
1965                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1966
1967                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1968                 DBA::update('contact', $fields, $condition);
1969
1970                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1971                 $condition['network'] = Protocol::OSTATUS;
1972
1973                 // If the contact failed, propagate the update fields to all contacts
1974                 if (empty($fields['failed'])) {
1975                         unset($fields['last-update']);
1976                         unset($fields['success_update']);
1977                         unset($fields['failure_update']);
1978                 }
1979
1980                 if (empty($fields)) {
1981                         return;
1982                 }
1983
1984                 DBA::update('contact', $fields, $condition);
1985         }
1986
1987         /**
1988          * Remove duplicated contacts
1989          *
1990          * @param string  $nurl  Normalised contact url
1991          * @param integer $uid   User id
1992          * @return boolean
1993          * @throws \Exception
1994          */
1995         public static function removeDuplicates(string $nurl, int $uid)
1996         {
1997                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1998                 $count = DBA::count('contact', $condition);
1999                 if ($count <= 1) {
2000                         return false;
2001                 }
2002
2003                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2004                 if (!DBA::isResult($first_contact)) {
2005                         // Shouldn't happen - so we handle it
2006                         return false;
2007                 }
2008
2009                 $first = $first_contact['id'];
2010                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2011                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2012                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2013                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2014                         return false;
2015                 }
2016
2017                 // Find all duplicates
2018                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2019                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2020                 while ($duplicate = DBA::fetch($duplicates)) {
2021                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2022                                 continue;
2023                         }
2024
2025                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2026                 }
2027                 DBA::close($duplicates);
2028                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2029                 return true;
2030         }
2031
2032         /**
2033          * @param integer $id      contact id
2034          * @param string  $network Optional network we are probing for
2035          * @return boolean
2036          * @throws HTTPException\InternalServerErrorException
2037          * @throws \ImagickException
2038          */
2039         public static function updateFromProbe(int $id, string $network = '')
2040         {
2041                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2042                 if (!DBA::isResult($contact)) {
2043                         return false;
2044                 }
2045
2046                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2047                 return self::updateFromProbeArray($id, $ret);
2048         }
2049
2050         /**
2051          * @param integer $id      contact id
2052          * @param array   $ret     Probed data
2053          * @return boolean
2054          * @throws HTTPException\InternalServerErrorException
2055          * @throws \ImagickException
2056          */
2057         private static function updateFromProbeArray(int $id, array $ret)
2058         {
2059                 /*
2060                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2061                   This will reliably kill your communication with old Friendica contacts.
2062                  */
2063
2064                 // These fields aren't updated by this routine:
2065                 // 'xmpp', 'sensitive'
2066
2067                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2068                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2069                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
2070                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2071                 if (!DBA::isResult($contact)) {
2072                         return false;
2073                 }
2074
2075                 if (self::isLocal($ret['url'])) {
2076                         if ($contact['uid'] == 0) {
2077                                 Logger::info('Local contacts are not updated here.');
2078                         } else {
2079                                 self::updateFromPublicContact($id, $contact);
2080                         }
2081                         return true;
2082                 }
2083
2084                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2085                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2086                         self::remove($id);
2087
2088                         // Delete all contacts with the same URL
2089                         self::deleteContactByUrl($ret['url']);
2090                         return true;
2091                 }
2092
2093                 $uid = $contact['uid'];
2094                 unset($contact['uid']);
2095
2096                 $uriid = $contact['uri-id'];
2097                 unset($contact['uri-id']);
2098
2099                 $pubkey = $contact['pubkey'];
2100                 unset($contact['pubkey']);
2101
2102                 $contact['photo'] = $contact['avatar'];
2103                 unset($contact['avatar']);
2104
2105                 $updated = DateTimeFormat::utcNow();
2106
2107                 // We must not try to update relay contacts via probe. They are no real contacts.
2108                 // We check after the probing to be able to correct falsely detected contact types.
2109                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2110                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2111                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2112                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2113                         return true;
2114                 }
2115
2116                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2117                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2118                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2119                         return false;
2120                 }
2121
2122                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2123                         $cid = self::getIdForURL($ret['url']);
2124                         if (!empty($cid) && ($cid != $id)) {
2125                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2126                                 return self::updateFromProbeArray($cid, $ret);
2127                         }
2128                 }
2129
2130                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2131                         $ret['unsearchable'] = $ret['hide'];
2132                 }
2133
2134                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2135                         $ret['forum'] = false;
2136                         $ret['prv'] = false;
2137                         $ret['contact-type'] = $ret['account-type'];
2138                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2139                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2140                                 $ret['prv'] = (bool)!$ret['forum'];
2141                         }
2142                 }
2143
2144                 $new_pubkey = $ret['pubkey'] ?? '';
2145
2146                 if ($uid == 0) {
2147                         $ret['last-item'] = Probe::getLastUpdate($ret);
2148                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2149                 }
2150
2151                 $update = false;
2152                 $guid = $ret['guid'] ?? '';
2153
2154                 // make sure to not overwrite existing values with blank entries except some technical fields
2155                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2156                 foreach ($ret as $key => $val) {
2157                         if (!array_key_exists($key, $contact)) {
2158                                 unset($ret[$key]);
2159                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2160                                 $ret[$key] = $contact[$key];
2161                         } elseif ($ret[$key] != $contact[$key]) {
2162                                 $update = true;
2163                         }
2164                 }
2165
2166                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2167                         $update = true;
2168                 } else {
2169                         unset($ret['last-item']);
2170                 }
2171
2172                 if (empty($uriid)) {
2173                         $update = true;
2174                 }
2175
2176                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2177                         self::updateAvatar($id, $ret['photo'], $update);
2178                 }
2179
2180                 if (!$update) {
2181                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2182
2183                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2184                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2185                         }
2186
2187                         // Update the public contact
2188                         if ($uid != 0) {
2189                                 $contact = self::getByURL($ret['url'], false, ['id']);
2190                                 if (!empty($contact['id'])) {
2191                                         self::updateFromProbeArray($contact['id'], $ret);
2192                                 }
2193                         }
2194
2195                         return true;
2196                 }
2197
2198                 if (empty($guid)) {
2199                         $ret['uri-id'] = ItemURI::getIdByURI($ret['url']);
2200                 } else {
2201                         $ret['uri-id'] = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2202                 }
2203
2204                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2205                 $ret['updated'] = $updated;
2206                 $ret['failed']  = false;
2207
2208                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2209                 if (empty($pubkey) && !empty($new_pubkey)) {
2210                         $ret['pubkey'] = $new_pubkey;
2211                 }
2212
2213                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2214                         $ret['uri-date'] = $updated;
2215                 }
2216
2217                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2218                         $ret['name-date'] = $updated;
2219                 }
2220
2221                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2222                         $ret['last-update'] = $updated;
2223                         $ret['success_update'] = $updated;
2224                 }
2225
2226                 unset($ret['photo']);
2227
2228                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2229
2230                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2231                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2232                 }
2233
2234                 return true;
2235         }
2236
2237         private static function updateFromPublicContact(int $id, array $contact)
2238         {
2239                 $public = self::getByURL($contact['url'], false);
2240
2241                 $fields = [];
2242
2243                 foreach ($contact as $field => $value) {
2244                         if ($field == 'uid') {
2245                                 continue;
2246                         }
2247                         if ($public[$field] != $value) {
2248                                 $fields[$field] = $public[$field];
2249                         }
2250                 }
2251                 if (!empty($fields)) {
2252                         DBA::update('contact', $fields, ['id' => $id, 'self' => false]);
2253                         Logger::info('Updating local contact', ['id' => $id]);
2254                 }
2255         }
2256
2257         /**
2258          * @param integer $url contact url
2259          * @return integer Contact id
2260          * @throws HTTPException\InternalServerErrorException
2261          * @throws \ImagickException
2262          */
2263         public static function updateFromProbeByURL($url)
2264         {
2265                 $id = self::getIdForURL($url);
2266
2267                 if (empty($id)) {
2268                         return $id;
2269                 }
2270
2271                 self::updateFromProbe($id);
2272
2273                 return $id;
2274         }
2275
2276         /**
2277          * Detects if a given contact array belongs to a legacy DFRN connection
2278          *
2279          * @param array $contact
2280          * @return boolean
2281          */
2282         public static function isLegacyDFRNContact($contact)
2283         {
2284                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2285                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2286         }
2287
2288         /**
2289          * Detects the communication protocol for a given contact url.
2290          * This is used to detect Friendica contacts that we can communicate via AP.
2291          *
2292          * @param string $url contact url
2293          * @param string $network Network of that contact
2294          * @return string with protocol
2295          */
2296         public static function getProtocol($url, $network)
2297         {
2298                 if ($network != Protocol::DFRN) {
2299                         return $network;
2300                 }
2301
2302                 $apcontact = APContact::getByURL($url);
2303                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2304                         return Protocol::ACTIVITYPUB;
2305                 } else {
2306                         return $network;
2307                 }
2308         }
2309
2310         /**
2311          * Takes a $uid and a url/handle and adds a new contact
2312          *
2313          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2314          * dfrn_request page.
2315          *
2316          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2317          *
2318          * Returns an array
2319          * $return['success'] boolean true if successful
2320          * $return['message'] error text if success is false.
2321          *
2322          * Takes a $uid and a url/handle and adds a new contact
2323          *
2324          * @param array  $user        The user the contact should be created for
2325          * @param string $url         The profile URL of the contact
2326          * @param bool   $interactive
2327          * @param string $network
2328          * @return array
2329          * @throws HTTPException\InternalServerErrorException
2330          * @throws HTTPException\NotFoundException
2331          * @throws \ImagickException
2332          */
2333         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2334         {
2335                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2336
2337                 // remove ajax junk, e.g. Twitter
2338                 $url = str_replace('/#!/', '/', $url);
2339
2340                 if (!Network::isUrlAllowed($url)) {
2341                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2342                         return $result;
2343                 }
2344
2345                 if (Network::isUrlBlocked($url)) {
2346                         $result['message'] = DI::l10n()->t('Blocked domain');
2347                         return $result;
2348                 }
2349
2350                 if (!$url) {
2351                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2352                         return $result;
2353                 }
2354
2355                 $arr = ['url' => $url, 'contact' => []];
2356
2357                 Hook::callAll('follow', $arr);
2358
2359                 if (empty($arr)) {
2360                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2361                         return $result;
2362                 }
2363
2364                 if (!empty($arr['contact']['name'])) {
2365                         $probed = false;
2366                         $ret = $arr['contact'];
2367                 } else {
2368                         $probed = true;
2369                         $ret = Probe::uri($url, $network, $user['uid']);
2370                 }
2371
2372                 if (($network != '') && ($ret['network'] != $network)) {
2373                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2374                         return $result;
2375                 }
2376
2377                 // check if we already have a contact
2378                 // the poll url is more reliable than the profile url, as we may have
2379                 // indirect links or webfinger links
2380
2381                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2382                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2383                 if (!DBA::isResult($contact)) {
2384                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2385                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2386                 }
2387
2388                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2389
2390                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2391                         if ($interactive) {
2392                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2393                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2394                                 } else {
2395                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2396                                 }
2397
2398                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2399
2400                                 // NOTREACHED
2401                         }
2402                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2403                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2404                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2405                         return $result;
2406                 }
2407
2408                 // This extra param just confuses things, remove it
2409                 if ($protocol === Protocol::DIASPORA) {
2410                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2411                 }
2412
2413                 // do we have enough information?
2414                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2415                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2416                         if (empty($ret['poll'])) {
2417                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2418                         }
2419                         if (empty($ret['name'])) {
2420                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2421                         }
2422                         if (empty($ret['url'])) {
2423                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2424                         }
2425                         if (strpos($ret['url'], '@') !== false) {
2426                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2427                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2428                         }
2429                         return $result;
2430                 }
2431
2432                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2433                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2434                         $ret['notify'] = '';
2435                 }
2436
2437                 if (!$ret['notify']) {
2438                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2439                 }
2440
2441                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2442
2443                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2444
2445                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2446
2447                 $pending = false;
2448                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2449                         $pending = (bool)$ret['manually-approve'];
2450                 }
2451
2452                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2453                         $writeable = 1;
2454                 }
2455
2456                 if (DBA::isResult($contact)) {
2457                         // update contact
2458                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2459
2460                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2461                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2462                 } else {
2463                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2464
2465                         // create contact record
2466                         self::insert([
2467                                 'uid'     => $user['uid'],
2468                                 'created' => DateTimeFormat::utcNow(),
2469                                 'url'     => $ret['url'],
2470                                 'nurl'    => Strings::normaliseLink($ret['url']),
2471                                 'addr'    => $ret['addr'],
2472                                 'alias'   => $ret['alias'],
2473                                 'batch'   => $ret['batch'],
2474                                 'notify'  => $ret['notify'],
2475                                 'poll'    => $ret['poll'],
2476                                 'poco'    => $ret['poco'],
2477                                 'name'    => $ret['name'],
2478                                 'nick'    => $ret['nick'],
2479                                 'network' => $ret['network'],
2480                                 'baseurl' => $ret['baseurl'],
2481                                 'gsid'    => $ret['gsid'] ?? null,
2482                                 'protocol' => $protocol,
2483                                 'pubkey'  => $ret['pubkey'],
2484                                 'rel'     => $new_relation,
2485                                 'priority'=> $ret['priority'],
2486                                 'writable'=> $writeable,
2487                                 'hidden'  => $hidden,
2488                                 'blocked' => 0,
2489                                 'readonly'=> 0,
2490                                 'pending' => $pending,
2491                                 'subhub'  => $subhub
2492                         ]);
2493                 }
2494
2495                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2496                 if (!DBA::isResult($contact)) {
2497                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2498                         return $result;
2499                 }
2500
2501                 $contact_id = $contact['id'];
2502                 $result['cid'] = $contact_id;
2503
2504                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2505
2506                 // Update the avatar
2507                 self::updateAvatar($contact_id, $ret['photo']);
2508
2509                 // pull feed and consume it, which should subscribe to the hub.
2510                 if ($contact['network'] == Protocol::OSTATUS) {
2511                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2512                 }
2513
2514                 if ($probed) {
2515                         self::updateFromProbeArray($contact_id, $ret);
2516                 } else {
2517                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2518                 }
2519
2520                 $owner = User::getOwnerDataById($user['uid']);
2521
2522                 if (DBA::isResult($owner)) {
2523                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2524                                 // create a follow slap
2525                                 $item = [];
2526                                 $item['verb'] = Activity::FOLLOW;
2527                                 $item['gravity'] = GRAVITY_ACTIVITY;
2528                                 $item['follow'] = $contact["url"];
2529                                 $item['body'] = '';
2530                                 $item['title'] = '';
2531                                 $item['guid'] = '';
2532                                 $item['uri-id'] = 0;
2533
2534                                 $slap = OStatus::salmon($item, $owner);
2535
2536                                 if (!empty($contact['notify'])) {
2537                                         Salmon::slapper($owner, $contact['notify'], $slap);
2538                                 }
2539                         } elseif ($protocol == Protocol::DIASPORA) {
2540                                 $ret = Diaspora::sendShare($owner, $contact);
2541                                 Logger::log('share returns: ' . $ret);
2542                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2543                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2544                                 if (empty($activity_id)) {
2545                                         // This really should never happen
2546                                         return false;
2547                                 }
2548
2549                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2550                                 Logger::log('Follow returns: ' . $ret);
2551                         }
2552                 }
2553
2554                 $result['success'] = true;
2555                 return $result;
2556         }
2557
2558         /**
2559          * Updated contact's SSL policy
2560          *
2561          * @param array  $contact    Contact array
2562          * @param string $new_policy New policy, valid: self,full
2563          *
2564          * @return array Contact array with updated values
2565          * @throws \Exception
2566          */
2567         public static function updateSslPolicy(array $contact, $new_policy)
2568         {
2569                 $ssl_changed = false;
2570                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2571                         $ssl_changed = true;
2572                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2573                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2574                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2575                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2576                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2577                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2578                 }
2579
2580                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2581                         $ssl_changed = true;
2582                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2583                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2584                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2585                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2586                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2587                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2588                 }
2589
2590                 if ($ssl_changed) {
2591                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2592                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2593                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2594                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2595                 }
2596
2597                 return $contact;
2598         }
2599
2600         /**
2601          * Follow a contact
2602          *
2603          * @param int $cid Public contact id
2604          * @param int $uid  User ID
2605          *
2606          * @return bool "true" if following had been successful
2607          */
2608         public static function follow(int $cid, int $uid)
2609         {
2610                 $user = User::getById($uid);
2611                 if (empty($user)) {
2612                         return false;
2613                 }
2614
2615                 $contact = self::getById($cid, ['url']);
2616
2617                 $result = self::createFromProbe($user, $contact['url'], false);
2618
2619                 return $result['cid'];
2620         }
2621
2622         /**
2623          * Unfollow a contact
2624          *
2625          * @param int $cid Public contact id
2626          * @param int $uid  User ID
2627          *
2628          * @return bool "true" if unfollowing had been successful
2629          */
2630         public static function unfollow(int $cid, int $uid)
2631         {
2632                 $cdata = self::getPublicAndUserContactID($cid, $uid);
2633                 if (empty($cdata['user'])) {
2634                         return false;
2635                 }
2636
2637                 $contact = self::getById($cdata['user']);
2638
2639                 self::removeSharer([], $contact);
2640
2641                 return true;
2642         }
2643
2644         /**
2645          * @param array  $importer Owner (local user) data
2646          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2647          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2648          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2649          * @param string $note     Introduction additional message
2650          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2651          * @throws HTTPException\InternalServerErrorException
2652          * @throws \ImagickException
2653          */
2654         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2655         {
2656                 // Should always be set
2657                 if (empty($datarray['author-id'])) {
2658                         return false;
2659                 }
2660
2661                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2662                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2663                 if (!DBA::isResult($pub_contact)) {
2664                         // Should never happen
2665                         return false;
2666                 }
2667
2668                 // Contact is blocked at node-level
2669                 if (self::isBlocked($datarray['author-id'])) {
2670                         return false;
2671                 }
2672
2673                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2674                 $name = $pub_contact['name'];
2675                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2676                 $nick = $pub_contact['nick'];
2677                 $network = $pub_contact['network'];
2678
2679                 // Ensure that we don't create a new contact when there already is one
2680                 $cid = self::getIdForURL($url, $importer['uid']);
2681                 if (!empty($cid)) {
2682                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2683                 }
2684
2685                 if (!empty($contact)) {
2686                         if (!empty($contact['pending'])) {
2687                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2688                                 return null;
2689                         }
2690
2691                         // Contact is blocked at user-level
2692                         if (!empty($contact['id']) && !empty($importer['id']) &&
2693                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2694                                 return false;
2695                         }
2696
2697                         // Make sure that the existing contact isn't archived
2698                         self::unmarkForArchival($contact);
2699
2700                         if (($contact['rel'] == self::SHARING)
2701                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2702                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2703                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2704                         }
2705
2706                         // Ensure to always have the correct network type, independent from the connection request method
2707                         self::updateFromProbe($contact['id']);
2708
2709                         Post\UserNotification::insertNotication($contact['id'], Verb::getID(Activity::FOLLOW), $importer['uid']);
2710
2711                         return true;
2712                 } else {
2713                         // send email notification to owner?
2714                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2715                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2716                                 return null;
2717                         }
2718
2719                         // create contact record
2720                         DBA::insert('contact', [
2721                                 'uid'      => $importer['uid'],
2722                                 'created'  => DateTimeFormat::utcNow(),
2723                                 'url'      => $url,
2724                                 'nurl'     => Strings::normaliseLink($url),
2725                                 'name'     => $name,
2726                                 'nick'     => $nick,
2727                                 'network'  => $network,
2728                                 'rel'      => self::FOLLOWER,
2729                                 'blocked'  => 0,
2730                                 'readonly' => 0,
2731                                 'pending'  => 1,
2732                                 'writable' => 1,
2733                         ]);
2734
2735                         $contact_id = DBA::lastInsertId();
2736
2737                         // Ensure to always have the correct network type, independent from the connection request method
2738                         self::updateFromProbe($contact_id);
2739
2740                         self::updateAvatar($contact_id, $photo, true);
2741
2742                         Post\UserNotification::insertNotication($contact_id, Verb::getID(Activity::FOLLOW), $importer['uid']);
2743
2744                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2745
2746                         /// @TODO Encapsulate this into a function/method
2747                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2748                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2749                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2750                                 // create notification
2751                                 $hash = Strings::getRandomHex();
2752
2753                                 if (is_array($contact_record)) {
2754                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2755                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2756                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2757                                 }
2758
2759                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2760
2761                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2762                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2763
2764                                         notification([
2765                                                 'type'  => Notification\Type::INTRO,
2766                                                 'otype' => Notification\ObjectType::INTRO,
2767                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2768                                                 'uid'   => $user['uid'],
2769                                                 'cid'   => $contact_record['id'],
2770                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2771                                         ]);
2772                                 }
2773                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2774                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2775                                         self::createFromProbe($importer, $url, false, $network);
2776                                 }
2777
2778                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2779                                 $fields = ['pending' => false];
2780                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2781                                         $fields['rel'] = self::FRIEND;
2782                                 }
2783
2784                                 DBA::update('contact', $fields, $condition);
2785
2786                                 return true;
2787                         }
2788                 }
2789
2790                 return null;
2791         }
2792
2793         public static function removeFollower($importer, $contact)
2794         {
2795                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2796                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2797                 } else {
2798                         self::remove($contact['id']);
2799                 }
2800         }
2801
2802         public static function removeSharer($importer, $contact)
2803         {
2804                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2805                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2806                 } else {
2807                         self::remove($contact['id']);
2808                 }
2809         }
2810
2811         /**
2812          * Create a birthday event.
2813          *
2814          * Update the year and the birthday.
2815          */
2816         public static function updateBirthdays()
2817         {
2818                 $condition = [
2819                         '`bd` > ?
2820                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2821                         AND NOT `contact`.`pending`
2822                         AND NOT `contact`.`hidden`
2823                         AND NOT `contact`.`blocked`
2824                         AND NOT `contact`.`archive`
2825                         AND NOT `contact`.`deleted`',
2826                         DBA::NULL_DATE,
2827                         self::SHARING,
2828                         self::FRIEND
2829                 ];
2830
2831                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2832
2833                 while ($contact = DBA::fetch($contacts)) {
2834                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2835
2836                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2837
2838                         if (Event::createBirthday($contact, $nextbd)) {
2839                                 // update bdyear
2840                                 DBA::update(
2841                                         'contact',
2842                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2843                                         ['id' => $contact['id']]
2844                                 );
2845                         }
2846                 }
2847                 DBA::close($contacts);
2848         }
2849
2850         /**
2851          * Remove the unavailable contact ids from the provided list
2852          *
2853          * @param array $contact_ids Contact id list
2854          * @return array
2855          * @throws \Exception
2856          */
2857         public static function pruneUnavailable(array $contact_ids)
2858         {
2859                 if (empty($contact_ids)) {
2860                         return [];
2861                 }
2862
2863                 $contacts = self::selectToArray(['id'], [
2864                         'id'      => $contact_ids,
2865                         'blocked' => false,
2866                         'pending' => false,
2867                         'archive' => false,
2868                 ]);
2869
2870                 return array_column($contacts, 'id');
2871         }
2872
2873         /**
2874          * Returns a magic link to authenticate remote visitors
2875          *
2876          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2877          *
2878          * @param string $contact_url The address of the target contact profile
2879          * @param string $url         An url that we will be redirected to after the authentication
2880          *
2881          * @return string with "redir" link
2882          * @throws HTTPException\InternalServerErrorException
2883          * @throws \ImagickException
2884          */
2885         public static function magicLink($contact_url, $url = '')
2886         {
2887                 if (!Session::isAuthenticated()) {
2888                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2889                 }
2890
2891                 $contact = self::getByURL($contact_url, false);
2892                 if (empty($contact)) {
2893                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2894                 }
2895
2896                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2897                 unset($contact['uid']);
2898
2899                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2900         }
2901
2902         /**
2903          * Returns a magic link to authenticate remote visitors
2904          *
2905          * @param integer $cid The contact id of the target contact profile
2906          * @param string  $url An url that we will be redirected to after the authentication
2907          *
2908          * @return string with "redir" link
2909          * @throws HTTPException\InternalServerErrorException
2910          * @throws \ImagickException
2911          */
2912         public static function magicLinkById($cid, $url = '')
2913         {
2914                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2915
2916                 return self::magicLinkByContact($contact, $url);
2917         }
2918
2919         /**
2920          * Returns a magic link to authenticate remote visitors
2921          *
2922          * @param array  $contact The contact array with "uid", "network" and "url"
2923          * @param string $url     An url that we will be redirected to after the authentication
2924          *
2925          * @return string with "redir" link
2926          * @throws HTTPException\InternalServerErrorException
2927          * @throws \ImagickException
2928          */
2929         public static function magicLinkByContact($contact, $url = '')
2930         {
2931                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2932
2933                 if (!Session::isAuthenticated()) {
2934                         return $destination;
2935                 }
2936
2937                 // Only redirections to the same host do make sense
2938                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2939                         return $url;
2940                 }
2941
2942                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2943                         return 'contact/' . $contact['id'] . '/conversations';
2944                 }
2945
2946                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2947                         return $destination;
2948                 }
2949
2950                 if (empty($contact['id'])) {
2951                         return $destination;
2952                 }
2953
2954                 $redirect = 'redir/' . $contact['id'];
2955
2956                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2957                         $redirect .= '?url=' . $url;
2958                 }
2959
2960                 return $redirect;
2961         }
2962
2963         /**
2964          * Is the contact a forum?
2965          *
2966          * @param integer $contactid ID of the contact
2967          *
2968          * @return boolean "true" if it is a forum
2969          */
2970         public static function isForum($contactid)
2971         {
2972                 $fields = ['forum', 'prv'];
2973                 $condition = ['id' => $contactid];
2974                 $contact = DBA::selectFirst('contact', $fields, $condition);
2975                 if (!DBA::isResult($contact)) {
2976                         return false;
2977                 }
2978
2979                 // Is it a forum?
2980                 return ($contact['forum'] || $contact['prv']);
2981         }
2982
2983         /**
2984          * Can the remote contact receive private messages?
2985          *
2986          * @param array $contact
2987          * @return bool
2988          */
2989         public static function canReceivePrivateMessages(array $contact)
2990         {
2991                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2992                 $self = $contact['self'] ?? false;
2993
2994                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2995         }
2996
2997         /**
2998          * Search contact table by nick or name
2999          *
3000          * @param string $search Name or nick
3001          * @param string $mode   Search mode (e.g. "community")
3002          * @param int    $uid    User ID
3003          *
3004          * @return array with search results
3005          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3006          */
3007         public static function searchByName(string $search, string $mode = '', int $uid = 0)
3008         {
3009                 if (empty($search)) {
3010                         return [];
3011                 }
3012
3013                 // check supported networks
3014                 if (DI::config()->get('system', 'diaspora_enabled')) {
3015                         $diaspora = Protocol::DIASPORA;
3016                 } else {
3017                         $diaspora = Protocol::DFRN;
3018                 }
3019
3020                 if (!DI::config()->get('system', 'ostatus_disabled')) {
3021                         $ostatus = Protocol::OSTATUS;
3022                 } else {
3023                         $ostatus = Protocol::DFRN;
3024                 }
3025
3026                 // check if we search only communities or every contact
3027                 if ($mode === 'community') {
3028                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
3029                 } else {
3030                         $extra_sql = '';
3031                 }
3032
3033                 $search .= '%';
3034
3035                 $results = DBA::p("SELECT * FROM `contact`
3036                         WHERE (NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` where `publish` OR `net-publish`))
3037                                 AND `network` IN (?, ?, ?, ?) AND
3038                                 NOT `failed` AND `uid` = ? AND
3039                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
3040                                 ORDER BY `nurl` DESC LIMIT 1000",
3041                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $uid, $search, $search, $search
3042                 );
3043
3044                 $contacts = DBA::toArray($results);
3045                 return $contacts;
3046         }
3047
3048         /**
3049          * Add public contacts from an array
3050          *
3051          * @param array $urls
3052          * @return array result "count", "added" and "updated"
3053          */
3054         public static function addByUrls(array $urls)
3055         {
3056                 $added = 0;
3057                 $updated = 0;
3058                 $unchanged = 0;
3059                 $count = 0;
3060
3061                 foreach ($urls as $url) {
3062                         if (empty($url) || !is_string($url)) {
3063                                 continue;
3064                         }
3065                         $contact = self::getByURL($url, false, ['id', 'updated']);
3066                         if (empty($contact['id'])) {
3067                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3068                                 ++$added;
3069                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3070                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3071                                 ++$updated;
3072                         } else {
3073                                 ++$unchanged;
3074                         }
3075                         ++$count;
3076                 }
3077
3078                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3079         }
3080
3081         /**
3082          * Returns a random, global contact array of the current node
3083          *
3084          * @return array The profile array
3085          * @throws Exception
3086          */
3087         public static function getRandomContact()
3088         {
3089                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3090                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3091                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3092                 ], ['order' => ['RAND()']]);
3093
3094                 if (DBA::isResult($contact)) {
3095                         return $contact;
3096                 }
3097
3098                 return [];
3099         }
3100 }