src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   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 DOMDocument;
  25 use DOMXPath;
  26 use Friendica\App\BaseURL;
  27 use Friendica\Content\Pager;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Session;
  32 use Friendica\Core\System;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Notify\Type;
  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         /**
  57          * @deprecated since version 2019.03
  58          * @see User::PAGE_FLAGS_NORMAL
  59          */
  60         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  61         /**
  62          * @deprecated since version 2019.03
  63          * @see User::PAGE_FLAGS_SOAPBOX
  64          */
  65         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  66         /**
  67          * @deprecated since version 2019.03
  68          * @see User::PAGE_FLAGS_COMMUNITY
  69          */
  70         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  71         /**
  72          * @deprecated since version 2019.03
  73          * @see User::PAGE_FLAGS_FREELOVE
  74          */
  75         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  76         /**
  77          * @deprecated since version 2019.03
  78          * @see User::PAGE_FLAGS_BLOG
  79          */
  80         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  81         /**
  82          * @deprecated since version 2019.03
  83          * @see User::PAGE_FLAGS_PRVGROUP
  84          */
  85         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  86         /**
  87          * @}
  88          */
  89
  90         /**
  91          * Account types
  92          *
  93          * TYPE_UNKNOWN - unknown type
  94          *
  95          * TYPE_PERSON - the account belongs to a person
  96          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  97          *
  98          * TYPE_ORGANISATION - the account belongs to an organisation
  99          *      Associated page type: PAGE_SOAPBOX
 100          *
 101          * TYPE_NEWS - the account is a news reflector
 102          *      Associated page type: PAGE_SOAPBOX
 103          *
 104          * TYPE_COMMUNITY - the account is community forum
 105          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 106          *
 107          * TYPE_RELAY - the account is a relay
 108          *      This will only be assigned to contacts, not to user accounts
 109          * @{
 110          */
 111         const TYPE_UNKNOWN =     -1;
 112         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 113         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 114         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 115         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 116         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 117         /**
 118          * @}
 119          */
 120
 121         /**
 122          * Contact_is
 123          *
 124          * Relationship types
 125          * @{
 126          */
 127         const FOLLOWER = 1;
 128         const SHARING  = 2;
 129         const FRIEND   = 3;
 130         /**
 131          * @}
 132          */
 133
 134         /**
 135          * @param array $fields    Array of selected fields, empty for all
 136          * @param array $condition Array of fields for condition
 137          * @param array $params    Array of several parameters
 138          * @return array
 139          * @throws \Exception
 140          */
 141         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 142         {
 143                 return DBA::selectToArray('contact', $fields, $condition, $params);
 144         }
 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 selectFirst(array $fields = [], array $condition = [], array $params = [])
 154         {
 155                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 156
 157                 return $contact;
 158         }
 159
 160         /**
 161          * Insert a row into the contact table
 162          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 163          *
 164          * @param array        $fields              field array
 165          * @param bool         $on_duplicate_update Do an update on a duplicate entry
 166          *
 167          * @return boolean was the insert successful?
 168          * @throws \Exception
 169          */
 170         public static function insert(array $fields, bool $on_duplicate_update = false)
 171         {
 172                 $ret = DBA::insert('contact', $fields, $on_duplicate_update);
 173                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 174                 if (!DBA::isResult($contact)) {
 175                         // Shouldn't happen
 176                         return $ret;
 177                 }
 178
 179                 // Search for duplicated contacts and get rid of them
 180                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 181
 182                 return $ret;
 183         }
 184
 185         /**
 186          * @param integer $id     Contact ID
 187          * @param array   $fields Array of selected fields, empty for all
 188          * @return array|boolean Contact record if it exists, false otherwise
 189          * @throws \Exception
 190          */
 191         public static function getById($id, $fields = [])
 192         {
 193                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 194         }
 195
 196         /**
 197          * Fetches a contact by a given url
 198          *
 199          * @param string  $url    profile url
 200          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 201          * @param array   $fields Field list
 202          * @param integer $uid    User ID of the contact
 203          * @return array contact array
 204          */
 205         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 206         {
 207                 if ($update || is_null($update)) {
 208                         $cid = self::getIdForURL($url, $uid, $update);
 209                         if (empty($cid)) {
 210                                 return [];
 211                         }
 212
 213                         $contact = self::getById($cid, $fields);
 214                         if (empty($contact)) {
 215                                 return [];
 216                         }
 217                         return $contact;
 218                 }
 219
 220                 // Add internal fields
 221                 $removal = [];
 222                 if (!empty($fields)) {
 223                         foreach (['id', 'updated', 'network'] as $internal) {
 224                                 if (!in_array($internal, $fields)) {
 225                                         $fields[] = $internal;
 226                                         $removal[] = $internal;
 227                                 }
 228                         }
 229                 }
 230
 231                 // We first try the nurl (http://server.tld/nick), most common case
 232                 $options = ['order' => ['id']];
 233                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 234
 235                 // Then the addr (nick@server.tld)
 236                 if (!DBA::isResult($contact)) {
 237                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 238                 }
 239
 240                 // Then the alias (which could be anything)
 241                 if (!DBA::isResult($contact)) {
 242                         // The link could be provided as http although we stored it as https
 243                         $ssl_url = str_replace('http://', 'https://', $url);
 244                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 245                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 246                 }
 247
 248                 if (!DBA::isResult($contact)) {
 249                         return [];
 250                 }
 251
 252                 // Update the contact in the background if needed
 253                 if ((($contact['updated'] < DateTimeFormat::utc('now -7 days')) || empty($contact['avatar'])) &&
 254                         in_array($contact['network'], Protocol::FEDERATED)) {
 255                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id'], ($uid == 0 ? 'force' : ''));
 256                 }
 257
 258                 // Remove the internal fields
 259                 foreach ($removal as $internal) {
 260                         unset($contact[$internal]);
 261                 }
 262
 263                 return $contact;
 264         }
 265
 266         /**
 267          * Fetches a contact for a given user by a given url.
 268          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 269          *
 270          * @param string  $url    profile url
 271          * @param integer $uid    User ID of the contact
 272          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 273          * @param array   $fields Field list
 274          * @return array contact array
 275          */
 276         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 277         {
 278                 if ($uid != 0) {
 279                         $contact = self::getByURL($url, $update, $fields, $uid);
 280                         if (!empty($contact)) {
 281                                 if (!empty($contact['id'])) {
 282                                         $contact['cid'] = $contact['id'];
 283                                         $contact['zid'] = 0;
 284                                 }
 285                                 return $contact;
 286                         }
 287                 }
 288
 289                 $contact = self::getByURL($url, $update, $fields);
 290                 if (!empty($contact['id'])) {
 291                         $contact['cid'] = 0;
 292                         $contact['zid'] = $contact['id'];
 293                 }
 294                 return $contact;
 295         }
 296
 297         /**
 298          * Tests if the given contact is a follower
 299          *
 300          * @param int $cid Either public contact id or user's contact id
 301          * @param int $uid User ID
 302          *
 303          * @return boolean is the contact id a follower?
 304          * @throws HTTPException\InternalServerErrorException
 305          * @throws \ImagickException
 306          */
 307         public static function isFollower($cid, $uid)
 308         {
 309                 if (Contact\User::isBlocked($cid, $uid)) {
 310                         return false;
 311                 }
 312
 313                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 314                 if (empty($cdata['user'])) {
 315                         return false;
 316                 }
 317
 318                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 319                 return DBA::exists('contact', $condition);
 320         }
 321
 322         /**
 323          * Tests if the given contact url is a follower
 324          *
 325          * @param string $url Contact URL
 326          * @param int    $uid User ID
 327          *
 328          * @return boolean is the contact id a follower?
 329          * @throws HTTPException\InternalServerErrorException
 330          * @throws \ImagickException
 331          */
 332         public static function isFollowerByURL($url, $uid)
 333         {
 334                 $cid = self::getIdForURL($url, $uid, false);
 335
 336                 if (empty($cid)) {
 337                         return false;
 338                 }
 339
 340                 return self::isFollower($cid, $uid);
 341         }
 342
 343         /**
 344          * Tests if the given user follow the given contact
 345          *
 346          * @param int $cid Either public contact id or user's contact id
 347          * @param int $uid User ID
 348          *
 349          * @return boolean is the contact url being followed?
 350          * @throws HTTPException\InternalServerErrorException
 351          * @throws \ImagickException
 352          */
 353         public static function isSharing($cid, $uid)
 354         {
 355                 if (Contact\User::isBlocked($cid, $uid)) {
 356                         return false;
 357                 }
 358
 359                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 360                 if (empty($cdata['user'])) {
 361                         return false;
 362                 }
 363
 364                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 365                 return DBA::exists('contact', $condition);
 366         }
 367
 368         /**
 369          * Tests if the given user follow the given contact url
 370          *
 371          * @param string $url Contact URL
 372          * @param int    $uid User ID
 373          *
 374          * @return boolean is the contact url being followed?
 375          * @throws HTTPException\InternalServerErrorException
 376          * @throws \ImagickException
 377          */
 378         public static function isSharingByURL($url, $uid)
 379         {
 380                 $cid = self::getIdForURL($url, $uid, false);
 381
 382                 if (empty($cid)) {
 383                         return false;
 384                 }
 385
 386                 return self::isSharing($cid, $uid);
 387         }
 388
 389         /**
 390          * Get the basepath for a given contact link
 391          *
 392          * @param string $url The contact link
 393          * @param boolean $dont_update Don't update the contact
 394          *
 395          * @return string basepath
 396          * @throws HTTPException\InternalServerErrorException
 397          * @throws \ImagickException
 398          */
 399         public static function getBasepath($url, $dont_update = false)
 400         {
 401                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 402                 if (!DBA::isResult($contact)) {
 403                         return '';
 404                 }
 405
 406                 if (!empty($contact['baseurl'])) {
 407                         return $contact['baseurl'];
 408                 } elseif ($dont_update) {
 409                         return '';
 410                 }
 411
 412                 // Update the existing contact
 413                 self::updateFromProbe($contact['id'], '', true);
 414
 415                 // And fetch the result
 416                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 417                 if (empty($contact['baseurl'])) {
 418                         Logger::info('No baseurl for contact', ['url' => $url]);
 419                         return '';
 420                 }
 421
 422                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 423                 return $contact['baseurl'];
 424         }
 425
 426         /**
 427          * Check if the given contact url is on the same server
 428          *
 429          * @param string $url The contact link
 430          *
 431          * @return boolean Is it the same server?
 432          */
 433         public static function isLocal($url)
 434         {
 435                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 436         }
 437
 438         /**
 439          * Check if the given contact ID is on the same server
 440          *
 441          * @param string $url The contact link
 442          *
 443          * @return boolean Is it the same server?
 444          */
 445         public static function isLocalById(int $cid)
 446         {
 447                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 448                 if (!DBA::isResult($contact)) {
 449                         return false;
 450                 }
 451
 452                 if (empty($contact['baseurl'])) {
 453                         $baseurl = self::getBasepath($contact['url'], true);
 454                 } else {
 455                         $baseurl = $contact['baseurl'];
 456                 }
 457
 458                 return Strings::compareLink($baseurl, DI::baseUrl());
 459         }
 460
 461         /**
 462          * Returns the public contact id of the given user id
 463          *
 464          * @param  integer $uid User ID
 465          *
 466          * @return integer|boolean Public contact id for given user id
 467          * @throws \Exception
 468          */
 469         public static function getPublicIdByUserId($uid)
 470         {
 471                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 472                 if (!DBA::isResult($self)) {
 473                         return false;
 474                 }
 475                 return self::getIdForURL($self['url'], 0, false);
 476         }
 477
 478         /**
 479          * Returns the contact id for the user and the public contact id for a given contact id
 480          *
 481          * @param int $cid Either public contact id or user's contact id
 482          * @param int $uid User ID
 483          *
 484          * @return array with public and user's contact id
 485          * @throws HTTPException\InternalServerErrorException
 486          * @throws \ImagickException
 487          */
 488         public static function getPublicAndUserContacID($cid, $uid)
 489         {
 490                 if (empty($uid) || empty($cid)) {
 491                         return [];
 492                 }
 493
 494                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 495                 if (!DBA::isResult($contact)) {
 496                         return [];
 497                 }
 498
 499                 // We quit when the user id don't match the user id of the provided contact
 500                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 501                         return [];
 502                 }
 503
 504                 if ($contact['uid'] != 0) {
 505                         $pcid = Contact::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 506                         if (empty($pcid)) {
 507                                 return [];
 508                         }
 509                         $ucid = $contact['id'];
 510                 } else {
 511                         $pcid = $contact['id'];
 512                         $ucid = Contact::getIdForURL($contact['url'], $uid, false);
 513                 }
 514
 515                 return ['public' => $pcid, 'user' => $ucid];
 516         }
 517
 518         /**
 519          * Returns contact details for a given contact id in combination with a user id
 520          *
 521          * @param int $cid A contact ID
 522          * @param int $uid The User ID
 523          * @param array $fields The selected fields for the contact
 524          *
 525          * @return array The contact details
 526          *
 527          * @throws \Exception
 528          */
 529         public static function getContactForUser($cid, $uid, array $fields = [])
 530         {
 531                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 532
 533                 if (!DBA::isResult($contact)) {
 534                         return [];
 535                 } else {
 536                         return $contact;
 537                 }
 538         }
 539
 540         /**
 541          * Returns a list of contacts belonging in a group
 542          *
 543          * @param int $gid
 544          * @return array
 545          * @throws \Exception
 546          */
 547         public static function getByGroupId($gid)
 548         {
 549                 $return = [];
 550
 551                 if (intval($gid)) {
 552                         $stmt = DBA::p('SELECT `group_member`.`contact-id`, `contact`.*
 553                                 FROM `contact`
 554                                 INNER JOIN `group_member`
 555                                         ON `contact`.`id` = `group_member`.`contact-id`
 556                                 WHERE `gid` = ?
 557                                 AND `contact`.`uid` = ?
 558                                 AND NOT `contact`.`self`
 559                                 AND NOT `contact`.`deleted`
 560                                 AND NOT `contact`.`blocked`
 561                                 AND NOT `contact`.`pending`
 562                                 ORDER BY `contact`.`name` ASC',
 563                                 $gid,
 564                                 local_user()
 565                         );
 566
 567                         if (DBA::isResult($stmt)) {
 568                                 $return = DBA::toArray($stmt);
 569                         }
 570                 }
 571
 572                 return $return;
 573         }
 574
 575         /**
 576          * Creates the self-contact for the provided user id
 577          *
 578          * @param int $uid
 579          * @return bool Operation success
 580          * @throws HTTPException\InternalServerErrorException
 581          */
 582         public static function createSelfFromUserId($uid)
 583         {
 584                 // Only create the entry if it doesn't exist yet
 585                 if (DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 586                         return true;
 587                 }
 588
 589                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname'], ['uid' => $uid]);
 590                 if (!DBA::isResult($user)) {
 591                         return false;
 592                 }
 593
 594                 $return = DBA::insert('contact', [
 595                         'uid'         => $user['uid'],
 596                         'created'     => DateTimeFormat::utcNow(),
 597                         'self'        => 1,
 598                         'name'        => $user['username'],
 599                         'nick'        => $user['nickname'],
 600                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 601                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 602                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 603                         'blocked'     => 0,
 604                         'pending'     => 0,
 605                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 606                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 607                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 608                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 609                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 610                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 611                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 612                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 613                         'name-date'   => DateTimeFormat::utcNow(),
 614                         'uri-date'    => DateTimeFormat::utcNow(),
 615                         'avatar-date' => DateTimeFormat::utcNow(),
 616                         'closeness'   => 0
 617                 ]);
 618
 619                 return $return;
 620         }
 621
 622         /**
 623          * Updates the self-contact for the provided user id
 624          *
 625          * @param int     $uid
 626          * @param boolean $update_avatar Force the avatar update
 627          * @throws HTTPException\InternalServerErrorException
 628          */
 629         public static function updateSelfFromUserID($uid, $update_avatar = false)
 630         {
 631                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar',
 632                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 633                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco'];
 634                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 635                 if (!DBA::isResult($self)) {
 636                         return;
 637                 }
 638
 639                 $fields = ['nickname', 'page-flags', 'account-type'];
 640                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid]);
 641                 if (!DBA::isResult($user)) {
 642                         return;
 643                 }
 644
 645                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 646                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 647                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 648                 if (!DBA::isResult($profile)) {
 649                         return;
 650                 }
 651
 652                 $file_suffix = 'jpg';
 653
 654                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 655                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 656                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 657                         'contact-type' => $user['account-type'],
 658                         'xmpp' => $profile['xmpp']];
 659
 660                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 661                 if (DBA::isResult($avatar)) {
 662                         if ($update_avatar) {
 663                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 664                         }
 665
 666                         // Creating the path to the avatar, beginning with the file suffix
 667                         $types = Images::supportedTypes();
 668                         if (isset($types[$avatar['type']])) {
 669                                 $file_suffix = $types[$avatar['type']];
 670                         }
 671
 672                         // We are adding a timestamp value so that other systems won't use cached content
 673                         $timestamp = strtotime($fields['avatar-date']);
 674
 675                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 676                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 677
 678                         $fields['photo'] = $prefix . '4' . $suffix;
 679                         $fields['thumb'] = $prefix . '5' . $suffix;
 680                         $fields['micro'] = $prefix . '6' . $suffix;
 681                 } else {
 682                         // We hadn't found a photo entry, so we use the default avatar
 683                         $fields['photo'] = DI::baseUrl() . '/images/person-300.jpg';
 684                         $fields['thumb'] = DI::baseUrl() . '/images/person-80.jpg';
 685                         $fields['micro'] = DI::baseUrl() . '/images/person-48.jpg';
 686                 }
 687
 688                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 689                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 690                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 691                 $fields['unsearchable'] = !$profile['net-publish'];
 692
 693                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 694                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 695                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 696                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 697                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 698                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 699                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 700                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 701                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 702
 703                 $update = false;
 704
 705                 foreach ($fields as $field => $content) {
 706                         if ($self[$field] != $content) {
 707                                 $update = true;
 708                         }
 709                 }
 710
 711                 if ($update) {
 712                         if ($fields['name'] != $self['name']) {
 713                                 $fields['name-date'] = DateTimeFormat::utcNow();
 714                         }
 715                         $fields['updated'] = DateTimeFormat::utcNow();
 716                         DBA::update('contact', $fields, ['id' => $self['id']]);
 717
 718                         // Update the public contact as well
 719                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 720
 721                         // Update the profile
 722                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 723                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 724                         DBA::update('profile', $fields, ['uid' => $uid]);
 725                 }
 726         }
 727
 728         /**
 729          * Marks a contact for removal
 730          *
 731          * @param int $id contact id
 732          * @return null
 733          * @throws HTTPException\InternalServerErrorException
 734          */
 735         public static function remove($id)
 736         {
 737                 // We want just to make sure that we don't delete our "self" contact
 738                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 739                 if (!DBA::isResult($contact) || !intval($contact['uid'])) {
 740                         return;
 741                 }
 742
 743                 // Archive the contact
 744                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 745
 746                 // Delete it in the background
 747                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 748         }
 749
 750         /**
 751          * Sends an unfriend message. Does not remove the contact
 752          *
 753          * @param array   $user     User unfriending
 754          * @param array   $contact  Contact unfriended
 755          * @param boolean $dissolve Remove the contact on the remote side
 756          * @return void
 757          * @throws HTTPException\InternalServerErrorException
 758          * @throws \ImagickException
 759          */
 760         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 761         {
 762                 if (empty($contact['network'])) {
 763                         return;
 764                 }
 765
 766                 $protocol = $contact['network'];
 767                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 768                         $protocol = Protocol::ACTIVITYPUB;
 769                 }
 770
 771                 if (($protocol == Protocol::DFRN) && $dissolve) {
 772                         DFRN::deliver($user, $contact, 'placeholder', true);
 773                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 774                         // create an unfollow slap
 775                         $item = [];
 776                         $item['verb'] = Activity::O_UNFOLLOW;
 777                         $item['gravity'] = GRAVITY_ACTIVITY;
 778                         $item['follow'] = $contact["url"];
 779                         $item['body'] = '';
 780                         $item['title'] = '';
 781                         $item['guid'] = '';
 782                         $item['uri-id'] = 0;
 783                         $item['attach'] = '';
 784                         $slap = OStatus::salmon($item, $user);
 785
 786                         if (!empty($contact['notify'])) {
 787                                 Salmon::slapper($user, $contact['notify'], $slap);
 788                         }
 789                 } elseif ($protocol == Protocol::DIASPORA) {
 790                         Diaspora::sendUnshare($user, $contact);
 791                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 792                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 793
 794                         if ($dissolve) {
 795                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 796                         }
 797                 }
 798         }
 799
 800         /**
 801          * Marks a contact for archival after a communication issue delay
 802          *
 803          * Contact has refused to recognise us as a friend. We will start a countdown.
 804          * If they still don't recognise us in 32 days, the relationship is over,
 805          * and we won't waste any more time trying to communicate with them.
 806          * This provides for the possibility that their database is temporarily messed
 807          * up or some other transient event and that there's a possibility we could recover from it.
 808          *
 809          * @param array $contact contact to mark for archival
 810          * @return null
 811          * @throws HTTPException\InternalServerErrorException
 812          */
 813         public static function markForArchival(array $contact)
 814         {
 815                 if (!isset($contact['url']) && !empty($contact['id'])) {
 816                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 817                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 818                         if (!DBA::isResult($contact)) {
 819                                 return;
 820                         }
 821                 } elseif (!isset($contact['url'])) {
 822                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 823                 }
 824
 825                 Logger::info('Contact is marked for archival', ['id' => $contact['id']]);
 826
 827                 // Contact already archived or "self" contact? => nothing to do
 828                 if ($contact['archive'] || $contact['self']) {
 829                         return;
 830                 }
 831
 832                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 833                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 834                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 835                 } else {
 836                         /* @todo
 837                          * We really should send a notification to the owner after 2-3 weeks
 838                          * so they won't be surprised when the contact vanishes and can take
 839                          * remedial action if this was a serious mistake or glitch
 840                          */
 841
 842                         /// @todo Check for contact vitality via probing
 843                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 844
 845                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 846                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 847                                 /* Relationship is really truly dead. archive them rather than
 848                                  * delete, though if the owner tries to unarchive them we'll start
 849                                  * the whole process over again.
 850                                  */
 851                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 852                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 853                         }
 854                 }
 855         }
 856
 857         /**
 858          * Cancels the archival countdown
 859          *
 860          * @see   Contact::markForArchival()
 861          *
 862          * @param array $contact contact to be unmarked for archival
 863          * @return null
 864          * @throws \Exception
 865          */
 866         public static function unmarkForArchival(array $contact)
 867         {
 868                 // Always unarchive the relay contact entry
 869                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 870                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 871                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 872                         DBA::update('contact', $fields, $condition);
 873                 }
 874
 875                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 876                 $exists = DBA::exists('contact', $condition);
 877
 878                 // We don't need to update, we never marked this contact for archival
 879                 if (!$exists) {
 880                         return;
 881                 }
 882
 883                 Logger::info('Contact is marked as vital again', ['id' => $contact['id']]);
 884
 885                 if (!isset($contact['url']) && !empty($contact['id'])) {
 886                         $fields = ['id', 'url', 'batch'];
 887                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 888                         if (!DBA::isResult($contact)) {
 889                                 return;
 890                         }
 891                 }
 892
 893                 // It's a miracle. Our dead contact has inexplicably come back to life.
 894                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 895                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 896                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 897         }
 898
 899         /**
 900          * Returns the data array for the photo menu of a given contact
 901          *
 902          * @param array $contact contact
 903          * @param int   $uid     optional, default 0
 904          * @return array
 905          * @throws HTTPException\InternalServerErrorException
 906          * @throws \ImagickException
 907          */
 908         public static function photoMenu(array $contact, $uid = 0)
 909         {
 910                 $pm_url = '';
 911                 $status_link = '';
 912                 $photos_link = '';
 913                 $contact_drop_link = '';
 914                 $poke_link = '';
 915
 916                 if ($uid == 0) {
 917                         $uid = local_user();
 918                 }
 919
 920                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 921                         if ($uid == 0) {
 922                                 $profile_link = self::magicLink($contact['url']);
 923                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 924
 925                                 return $menu;
 926                         }
 927
 928                         // Look for our own contact if the uid doesn't match and isn't public
 929                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 930                         if (DBA::isResult($contact_own)) {
 931                                 return self::photoMenu($contact_own, $uid);
 932                         }
 933                 }
 934
 935                 $sparkle = false;
 936                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 937                         $sparkle = true;
 938                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 939                 } else {
 940                         $profile_link = $contact['url'];
 941                 }
 942
 943                 if ($profile_link === 'mailbox') {
 944                         $profile_link = '';
 945                 }
 946
 947                 if ($sparkle) {
 948                         $status_link = $profile_link . '/status';
 949                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 950                         $profile_link = $profile_link . '/profile';
 951                 }
 952
 953                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 954                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 955                 }
 956
 957                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 958                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 959                 }
 960
 961                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 962
 963                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 964
 965                 if (!$contact['self']) {
 966                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 967                 }
 968
 969                 $follow_link = '';
 970                 $unfollow_link = '';
 971                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 972                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 973                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']);
 974                         } elseif(!$contact['pending']) {
 975                                 $follow_link = 'follow?url=' . urlencode($contact['url']);
 976                         }
 977                 }
 978
 979                 if (!empty($follow_link) || !empty($unfollow_link)) {
 980                         $contact_drop_link = '';
 981                 }
 982
 983                 /**
 984                  * Menu array:
 985                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 986                  */
 987                 if (empty($contact['uid'])) {
 988                         $menu = [
 989                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
 990                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
 991                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
 992                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
 993                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
 994                         ];
 995                 } else {
 996                         $menu = [
 997                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
 998                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
 999                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1000                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1001                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1002                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1003                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1004                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1005                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1006                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1007                         ];
1008
1009                         if (!empty($contact['pending'])) {
1010                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1011                                 if (DBA::isResult($intro)) {
1012                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1013                                 }
1014                         }
1015                 }
1016
1017                 $args = ['contact' => $contact, 'menu' => &$menu];
1018
1019                 Hook::callAll('contact_photo_menu', $args);
1020
1021                 $menucondensed = [];
1022
1023                 foreach ($menu as $menuname => $menuitem) {
1024                         if ($menuitem[1] != '') {
1025                                 $menucondensed[$menuname] = $menuitem;
1026                         }
1027                 }
1028
1029                 return $menucondensed;
1030         }
1031
1032         /**
1033          * Returns ungrouped contact count or list for user
1034          *
1035          * Returns either the total number of ungrouped contacts for the given user
1036          * id or a paginated list of ungrouped contacts.
1037          *
1038          * @param int $uid uid
1039          * @return array
1040          * @throws \Exception
1041          */
1042         public static function getUngroupedList($uid)
1043         {
1044                 return q("SELECT *
1045                            FROM `contact`
1046                            WHERE `uid` = %d
1047                            AND NOT `self`
1048                            AND NOT `deleted`
1049                            AND NOT `blocked`
1050                            AND NOT `pending`
1051                            AND `id` NOT IN (
1052                                 SELECT DISTINCT(`contact-id`)
1053                                 FROM `group_member`
1054                                 INNER JOIN `group` ON `group`.`id` = `group_member`.`gid`
1055                                 WHERE `group`.`uid` = %d
1056                            )", intval($uid), intval($uid));
1057         }
1058
1059         /**
1060          * Have a look at all contact tables for a given profile url.
1061          * This function works as a replacement for probing the contact.
1062          *
1063          * @param string  $url Contact URL
1064          * @param integer $cid Contact ID
1065          *
1066          * @return array Contact array in the "probe" structure
1067         */
1068         private static function getProbeDataFromDatabase($url, $cid = null)
1069         {
1070                 // The link could be provided as http although we stored it as https
1071                 $ssl_url = str_replace('http://', 'https://', $url);
1072
1073                 $fields = ['id', 'uid', 'url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
1074                         'photo', 'keywords', 'location', 'about', 'network',
1075                         'priority', 'batch', 'request', 'confirm', 'poco'];
1076
1077                 if (!empty($cid)) {
1078                         $data = DBA::selectFirst('contact', $fields, ['id' => $cid]);
1079                         if (DBA::isResult($data)) {
1080                                 return $data;
1081                         }
1082                 }
1083
1084                 $data = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url)]);
1085
1086                 if (!DBA::isResult($data)) {
1087                         $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
1088                         $data = DBA::selectFirst('contact', $fields, $condition);
1089                 }
1090
1091                 if (DBA::isResult($data)) {
1092                         // For security reasons we don't fetch key data from our users
1093                         $data["pubkey"] = '';
1094                         return $data;
1095                 }
1096
1097                 $fields = ['url', 'addr', 'alias', 'notify', 'name', 'nick',
1098                         'photo', 'keywords', 'location', 'about', 'network'];
1099                 $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
1100                 $data = DBA::selectFirst('contact', $fields, $condition);
1101
1102                 if (DBA::isResult($data)) {
1103                         $data["pubkey"] = '';
1104                         $data["poll"] = '';
1105                         $data["priority"] = 0;
1106                         $data["batch"] = '';
1107                         $data["request"] = '';
1108                         $data["confirm"] = '';
1109                         $data["poco"] = '';
1110                         return $data;
1111                 }
1112
1113                 $data = ActivityPub::probeProfile($url, false);
1114                 if (!empty($data)) {
1115                         return $data;
1116                 }
1117
1118                 $fields = ['url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
1119                         'photo', 'network', 'priority', 'batch', 'request', 'confirm'];
1120                 $data = DBA::selectFirst('fcontact', $fields, ['url' => $url]);
1121
1122                 if (!DBA::isResult($data)) {
1123                         $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
1124                         $data = DBA::selectFirst('contact', $fields, $condition);
1125                 }
1126
1127                 if (DBA::isResult($data)) {
1128                         $data["pubkey"] = '';
1129                         $data["keywords"] = '';
1130                         $data["location"] = '';
1131                         $data["about"] = '';
1132                         $data["poco"] = '';
1133                         return $data;
1134                 }
1135
1136                 return [];
1137         }
1138
1139         /**
1140          * Fetch the contact id for a given URL and user
1141          *
1142          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1143          * `addr` or `alias`.
1144          *
1145          * If there's no record and we aren't looking for a public contact, we quit.
1146          * If there's one, we check that it isn't time to update the picture else we
1147          * directly return the found contact id.
1148          *
1149          * Second, we probe the provided $url whether it's http://server.tld/profile or
1150          * nick@server.tld. We quit if we can't get any info back.
1151          *
1152          * Third, we create the contact record if it doesn't exist
1153          *
1154          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1155          * if there's any updates
1156          *
1157          * @param string  $url       Contact URL
1158          * @param integer $uid       The user id for the contact (0 = public contact)
1159          * @param boolean $update    true = always update, false = never update, null = update when not found or outdated
1160          * @param array   $default   Default value for creating the contact when every else fails
1161          *
1162          * @return integer Contact ID
1163          * @throws HTTPException\InternalServerErrorException
1164          * @throws \ImagickException
1165          */
1166         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1167         {
1168                 Logger::info('Get contact data', ['url' => $url, 'user' => $uid]);
1169
1170                 $contact_id = 0;
1171
1172                 if ($url == '') {
1173                         return 0;
1174                 }
1175
1176                 $contact = self::getByURL($url, false, ['id', 'avatar', 'updated', 'network'], $uid);
1177
1178                 if (!empty($contact)) {
1179                         $contact_id = $contact["id"];
1180
1181                         if (empty($default) && in_array($contact['network'], [Protocol::MAIL, Protocol::PHANTOM]) && ($uid == 0)) {
1182                                 // Update public mail accounts via their user's accounts
1183                                 $fields = ['network', 'addr', 'name', 'nick', 'avatar', 'photo', 'thumb', 'micro'];
1184                                 $mailcontact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `network` = ? AND `uid` != 0", $url, Protocol::MAIL]);
1185                                 if (!DBA::isResult($mailcontact)) {
1186                                         $mailcontact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `network` = ? AND `uid` != 0", $url, Protocol::MAIL]);
1187                                 }
1188
1189                                 if (DBA::isResult($mailcontact)) {
1190                                         DBA::update('contact', $mailcontact, ['id' => $contact_id]);
1191                                 }
1192                         }
1193
1194                         if (empty($update)) {
1195                                 return $contact_id;
1196                         }
1197                 } elseif ($uid != 0) {
1198                         // Non-existing user-specific contact, exiting
1199                         return 0;
1200                 }
1201
1202                 if (!$update && empty($default)) {
1203                         // When we don't want to update, we look if we know this contact in any way
1204                         $data = self::getProbeDataFromDatabase($url, $contact_id);
1205                         $background_update = true;
1206                 } elseif (!$update && !empty($default['network'])) {
1207                         // If there are default values, take these
1208                         $data = $default;
1209                         $background_update = false;
1210                 } else {
1211                         $data = [];
1212                         $background_update = false;
1213                 }
1214
1215                 if ((empty($data) && is_null($update)) || $update) {
1216                         $data = Probe::uri($url, "", $uid);
1217                 }
1218
1219                 // Take the default values when probing failed
1220                 if (!empty($default) && (empty($data['network']) || !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO])))) {
1221                         $data = array_merge($data, $default);
1222                 }
1223
1224                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1225                         Logger::info('No valid network found', ['url' => $url, 'data' => $data, 'callstack' => System::callstack(20)]);
1226                         return 0;
1227                 }
1228
1229                 if (!empty($data['baseurl'])) {
1230                         $data['baseurl'] = GServer::cleanURL($data['baseurl']);
1231                 }
1232
1233                 if (!empty($data['baseurl']) && empty($data['gsid'])) {
1234                         $data['gsid'] = GServer::getID($data['baseurl']);
1235                 }
1236
1237                 if (!$contact_id && !empty($data['alias']) && ($data['alias'] != $data['url'])) {
1238                         $contact = self::getByURL($data['alias'], false, ['id']);
1239                         if (!empty($contact['id'])) {
1240                                 $contact_id = $contact['id'];
1241                                 Logger::info('Fetched id by alias', ['cid' => $contact_id, 'url' => $url, 'probed_url' => $data['url'], 'alias' => $data['alias']]);
1242                         }
1243                 }
1244
1245                 // Possibly there is a contact entry with the probed URL
1246                 if (!$contact_id  && ($url != $data['url']) && ($url != $data['alias'])) {
1247                         $contact = self::getByURL($data['url'], false, ['id']);
1248                         if (!empty($contact['id'])) {
1249                                 $contact_id = $contact['id'];
1250                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'url' => $url, 'probed_url' => $data['url'], 'alias' => $data['alias']]);
1251                         }
1252                 }
1253
1254                 if ($uid == 0) {
1255                         $data['last-item'] = Probe::getLastUpdate($data);
1256                         Logger::info('Fetched last item', ['url' => $url, 'probed_url' => $data['url'], 'last-item' => $data['last-item'], 'callstack' => System::callstack(20)]);
1257                 }
1258
1259                 if (!$contact_id) {
1260                         $fields = [
1261                                 'uid'       => $uid,
1262                                 'created'   => DateTimeFormat::utcNow(),
1263                                 'url'       => $data['url'],
1264                                 'nurl'      => Strings::normaliseLink($data['url']),
1265                                 'addr'      => $data['addr'] ?? '',
1266                                 'alias'     => $data['alias'] ?? '',
1267                                 'notify'    => $data['notify'] ?? '',
1268                                 'poll'      => $data['poll'] ?? '',
1269                                 'name'      => $data['name'] ?? '',
1270                                 'nick'      => $data['nick'] ?? '',
1271                                 'keywords'  => $data['keywords'] ?? '',
1272                                 'location'  => $data['location'] ?? '',
1273                                 'about'     => $data['about'] ?? '',
1274                                 'network'   => $data['network'],
1275                                 'pubkey'    => $data['pubkey'] ?? '',
1276                                 'rel'       => self::SHARING,
1277                                 'priority'  => $data['priority'] ?? 0,
1278                                 'batch'     => $data['batch'] ?? '',
1279                                 'request'   => $data['request'] ?? '',
1280                                 'confirm'   => $data['confirm'] ?? '',
1281                                 'poco'      => $data['poco'] ?? '',
1282                                 'baseurl'   => $data['baseurl'] ?? '',
1283                                 'gsid'      => $data['gsid'] ?? null,
1284                                 'name-date' => DateTimeFormat::utcNow(),
1285                                 'uri-date'  => DateTimeFormat::utcNow(),
1286                                 'avatar-date' => DateTimeFormat::utcNow(),
1287                                 'writable'  => 1,
1288                                 'blocked'   => 0,
1289                                 'readonly'  => 0,
1290                                 'pending'   => 0];
1291
1292                         if (!empty($data['last-item'])) {
1293                                 $fields['last-item'] = $data['last-item'];
1294                         }
1295
1296                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1297
1298                         // Before inserting we do check if the entry does exist now.
1299                         $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1300                         if (!DBA::isResult($contact)) {
1301                                 Logger::info('Create new contact', $fields);
1302
1303                                 self::insert($fields);
1304
1305                                 // We intentionally aren't using lastInsertId here. There is a chance for duplicates.
1306                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1307                                 if (!DBA::isResult($contact)) {
1308                                         Logger::info('Contact creation failed', $fields);
1309                                         // Shouldn't happen
1310                                         return 0;
1311                                 }
1312                         } else {
1313                                 Logger::info('Contact had been created before', ['id' => $contact["id"], 'url' => $url, 'contact' => $fields]);
1314                         }
1315
1316                         $contact_id = $contact["id"];
1317                 }
1318
1319                 if (!empty($data['photo']) && ($data['network'] != Protocol::FEED)) {
1320                         self::updateAvatar($contact_id, $data['photo']);
1321                 }
1322
1323                 if (in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1324                         if ($background_update) {
1325                                 // Update in the background when we fetched the data solely from the database
1326                                 Worker::add(PRIORITY_MEDIUM, "UpdateContact", $contact_id, ($uid == 0 ? 'force' : ''));
1327                         } else {
1328                                 // Else do a direct update
1329                                 self::updateFromProbe($contact_id, '', false);
1330                         }
1331                 } else {
1332                         $fields = ['url', 'nurl', 'addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'avatar-date', 'baseurl', 'gsid', 'last-item'];
1333                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact_id]);
1334
1335                         // This condition should always be true
1336                         if (!DBA::isResult($contact)) {
1337                                 return $contact_id;
1338                         }
1339
1340                         $updated = [
1341                                 'url' => $data['url'],
1342                                 'nurl' => Strings::normaliseLink($data['url']),
1343                                 'updated' => DateTimeFormat::utcNow(),
1344                                 'failed' => false
1345                         ];
1346
1347                         $fields = ['addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'baseurl', 'gsid'];
1348
1349                         foreach ($fields as $field) {
1350                                 $updated[$field] = ($data[$field] ?? '') ?: $contact[$field];
1351                         }
1352
1353                         if (!empty($data['last-item']) && ($contact['last-item'] < $data['last-item'])) {
1354                                 $updated['last-item'] = $data['last-item'];
1355                         }
1356
1357                         if (($updated['addr'] != $contact['addr']) || (!empty($data['alias']) && ($data['alias'] != $contact['alias']))) {
1358                                 $updated['uri-date'] = DateTimeFormat::utcNow();
1359                         }
1360
1361                         if (($data['name'] != $contact['name']) || ($data['nick'] != $contact['nick'])) {
1362                                 $updated['name-date'] = DateTimeFormat::utcNow();
1363                         }
1364
1365                         DBA::update('contact', $updated, ['id' => $contact_id], $contact);
1366                 }
1367
1368                 return $contact_id;
1369         }
1370
1371         /**
1372          * Checks if the contact is archived
1373          *
1374          * @param int $cid contact id
1375          *
1376          * @return boolean Is the contact archived?
1377          * @throws HTTPException\InternalServerErrorException
1378          */
1379         public static function isArchived(int $cid)
1380         {
1381                 if ($cid == 0) {
1382                         return false;
1383                 }
1384
1385                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1386                 if (!DBA::isResult($contact)) {
1387                         return false;
1388                 }
1389
1390                 if ($contact['archive']) {
1391                         return true;
1392                 }
1393
1394                 // Check status of ActivityPub endpoints
1395                 $apcontact = APContact::getByURL($contact['url'], false);
1396                 if (!empty($apcontact)) {
1397                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1398                                 return true;
1399                         }
1400
1401                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1402                                 return true;
1403                         }
1404                 }
1405
1406                 // Check status of Diaspora endpoints
1407                 if (!empty($contact['batch'])) {
1408                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1409                         return DBA::exists('contact', $condition);
1410                 }
1411
1412                 return false;
1413         }
1414
1415         /**
1416          * Checks if the contact is blocked
1417          *
1418          * @param int $cid contact id
1419          *
1420          * @return boolean Is the contact blocked?
1421          * @throws HTTPException\InternalServerErrorException
1422          */
1423         public static function isBlocked($cid)
1424         {
1425                 if ($cid == 0) {
1426                         return false;
1427                 }
1428
1429                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1430                 if (!DBA::isResult($blocked)) {
1431                         return false;
1432                 }
1433
1434                 if (Network::isUrlBlocked($blocked['url'])) {
1435                         return true;
1436                 }
1437
1438                 return (bool) $blocked['blocked'];
1439         }
1440
1441         /**
1442          * Checks if the contact is hidden
1443          *
1444          * @param int $cid contact id
1445          *
1446          * @return boolean Is the contact hidden?
1447          * @throws \Exception
1448          */
1449         public static function isHidden($cid)
1450         {
1451                 if ($cid == 0) {
1452                         return false;
1453                 }
1454
1455                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1456                 if (!DBA::isResult($hidden)) {
1457                         return false;
1458                 }
1459                 return (bool) $hidden['hidden'];
1460         }
1461
1462         /**
1463          * Returns posts from a given contact url
1464          *
1465          * @param string $contact_url Contact URL
1466          * @param bool   $thread_mode
1467          * @param int    $update
1468          * @return string posts in HTML
1469          * @throws \Exception
1470          */
1471         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0)
1472         {
1473                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update);
1474         }
1475
1476         /**
1477          * Returns posts from a given contact id
1478          *
1479          * @param integer $cid
1480          * @param bool    $thread_mode
1481          * @param integer $update
1482          * @return string posts in HTML
1483          * @throws \Exception
1484          */
1485         public static function getPostsFromId($cid, $thread_mode = false, $update = 0)
1486         {
1487                 $a = DI::app();
1488
1489                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1490                 if (!DBA::isResult($contact)) {
1491                         return '';
1492                 }
1493
1494                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1495                         $sql = "(`item`.`uid` = 0 OR (`item`.`uid` = ? AND NOT `item`.`global`))";
1496                 } else {
1497                         $sql = "`item`.`uid` = ?";
1498                 }
1499
1500                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1501
1502                 if ($thread_mode) {
1503                         $condition = ["`$contact_field` = ? AND `gravity` = ? AND " . $sql,
1504                                 $cid, GRAVITY_PARENT, local_user()];
1505                 } else {
1506                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1507                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1508                 }
1509
1510                 if (DI::mode()->isMobile()) {
1511                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1512                                 DI::config()->get('system', 'itemspage_network_mobile'));
1513                 } else {
1514                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1515                                 DI::config()->get('system', 'itemspage_network'));
1516                 }
1517
1518                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1519
1520                 $params = ['order' => ['received' => true],
1521                         'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1522
1523                 if ($thread_mode) {
1524                         $r = Item::selectThreadForUser(local_user(), ['uri'], $condition, $params);
1525
1526                         $items = Item::inArray($r);
1527
1528                         $o = conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1529                 } else {
1530                         $r = Item::selectForUser(local_user(), [], $condition, $params);
1531
1532                         $items = Item::inArray($r);
1533
1534                         $o = conversation($a, $items, 'contact-posts', false);
1535                 }
1536
1537                 if (!$update) {
1538                         $o .= $pager->renderMinimal(count($items));
1539                 }
1540
1541                 return $o;
1542         }
1543
1544         /**
1545          * Returns the account type name
1546          *
1547          * The function can be called with either the user or the contact array
1548          *
1549          * @param array $contact contact or user array
1550          * @return string
1551          */
1552         public static function getAccountType(array $contact)
1553         {
1554                 // There are several fields that indicate that the contact or user is a forum
1555                 // "page-flags" is a field in the user table,
1556                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1557                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1558                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1559                         || (isset($contact['forum']) && intval($contact['forum']))
1560                         || (isset($contact['prv']) && intval($contact['prv']))
1561                         || (isset($contact['community']) && intval($contact['community']))
1562                 ) {
1563                         $type = self::TYPE_COMMUNITY;
1564                 } else {
1565                         $type = self::TYPE_PERSON;
1566                 }
1567
1568                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1569                 if (isset($contact["contact-type"])) {
1570                         $type = $contact["contact-type"];
1571                 }
1572
1573                 if (isset($contact["account-type"])) {
1574                         $type = $contact["account-type"];
1575                 }
1576
1577                 switch ($type) {
1578                         case self::TYPE_ORGANISATION:
1579                                 $account_type = DI::l10n()->t("Organisation");
1580                                 break;
1581
1582                         case self::TYPE_NEWS:
1583                                 $account_type = DI::l10n()->t('News');
1584                                 break;
1585
1586                         case self::TYPE_COMMUNITY:
1587                                 $account_type = DI::l10n()->t("Forum");
1588                                 break;
1589
1590                         default:
1591                                 $account_type = "";
1592                                 break;
1593                 }
1594
1595                 return $account_type;
1596         }
1597
1598         /**
1599          * Blocks a contact
1600          *
1601          * @param int $cid
1602          * @return bool
1603          * @throws \Exception
1604          */
1605         public static function block($cid, $reason = null)
1606         {
1607                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1608
1609                 return $return;
1610         }
1611
1612         /**
1613          * Unblocks a contact
1614          *
1615          * @param int $cid
1616          * @return bool
1617          * @throws \Exception
1618          */
1619         public static function unblock($cid)
1620         {
1621                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1622
1623                 return $return;
1624         }
1625
1626         /**
1627          * Ensure that cached avatar exist
1628          *
1629          * @param integer $cid
1630          */
1631         public static function checkAvatarCache(int $cid)
1632         {
1633                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1634                 if (!DBA::isResult($contact)) {
1635                         return;
1636                 }
1637
1638                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1639                         return;
1640                 }
1641
1642                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1643
1644                 self::updateAvatar($cid, $contact['avatar'], true);
1645         }
1646
1647         /**
1648          * Return the photo path for a given contact array in the given size
1649          *
1650          * @param array $contact  contact array
1651          * @param string $field   Fieldname of the photo in the contact array
1652          * @param string $default Default path when no picture had been found
1653          * @param string $size    Size of the avatar picture
1654          * @param string $avatar  Avatar path that is displayed when no photo had been found
1655          * @return string photo path
1656          */
1657         private static function getAvatarPath(array $contact, string $field, string $default, string $size, string $avatar)
1658         {
1659                 if (!empty($contact)) {
1660                         $contact = self::checkAvatarCacheByArray($contact);
1661                         if (!empty($contact[$field])) {
1662                                 $avatar = $contact[$field];
1663                         }
1664                 }
1665
1666                 if (empty($avatar)) {
1667                         return $default;
1668                 }
1669
1670                 if (Proxy::isLocalImage($avatar)) {
1671                         return $avatar;
1672                 } else {
1673                         return Proxy::proxifyUrl($avatar, false, $size);
1674                 }
1675         }
1676
1677         /**
1678          * Return the photo path for a given contact array
1679          *
1680          * @param array $contact Contact array
1681          * @param string $avatar  Avatar path that is displayed when no photo had been found
1682          * @return string photo path
1683          */
1684         public static function getPhoto(array $contact, string $avatar = '')
1685         {
1686                 return self::getAvatarPath($contact, 'photo', DI::baseUrl() . '/images/person-300.jpg', Proxy::SIZE_SMALL, $avatar);
1687         }
1688
1689         /**
1690          * Return the photo path (thumb size) for a given contact array
1691          *
1692          * @param array $contact Contact array
1693          * @param string $avatar  Avatar path that is displayed when no photo had been found
1694          * @return string photo path
1695          */
1696         public static function getThumb(array $contact, string $avatar = '')
1697         {
1698                 return self::getAvatarPath($contact, 'thumb', DI::baseUrl() . '/images/person-80.jpg', Proxy::SIZE_THUMB, $avatar);
1699         }
1700
1701         /**
1702          * Return the photo path (micro size) for a given contact array
1703          *
1704          * @param array $contact Contact array
1705          * @param string $avatar  Avatar path that is displayed when no photo had been found
1706          * @return string photo path
1707          */
1708         public static function getMicro(array $contact, string $avatar = '')
1709         {
1710                 return self::getAvatarPath($contact, 'micro', DI::baseUrl() . '/images/person-48.jpg', Proxy::SIZE_MICRO, $avatar);
1711         }
1712
1713         /**
1714          * Check the given contact array for avatar cache fields
1715          *
1716          * @param array $contact
1717          * @return array contact array with avatar cache fields
1718          */
1719         private static function checkAvatarCacheByArray(array $contact)
1720         {
1721                 $update = false;
1722                 $contact_fields = [];
1723                 $fields = ['photo', 'thumb', 'micro'];
1724                 foreach ($fields as $field) {
1725                         if (isset($contact[$field])) {
1726                                 $contact_fields[] = $field;
1727                         }
1728                         if (isset($contact[$field]) && empty($contact[$field])) {
1729                                 $update = true;
1730                         }
1731                 }
1732
1733                 if (!$update) {
1734                         return $contact;
1735                 }
1736
1737                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1738                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1739
1740                         $new_contact = self::getById($contact['id'], $contact_fields);
1741                         if (DBA::isResult($new_contact)) {
1742                                 // We only update the cache fields
1743                                 $contact = array_merge($contact, $new_contact);
1744                         }
1745                 }
1746
1747                 /// add the default avatars if the fields aren't filled
1748                 if (isset($contact['photo']) && empty($contact['photo'])) {
1749                         $contact['photo'] = DI::baseUrl() . '/images/person-300.jpg';
1750                 }
1751                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1752                         $contact['thumb'] = DI::baseUrl() . '/images/person-80.jpg';
1753                 }
1754                 if (isset($contact['micro']) && empty($contact['micro'])) {
1755                         $contact['micro'] = DI::baseUrl() . '/images/person-48.jpg';
1756                 }
1757
1758                 return $contact;
1759         }
1760
1761         /**
1762          * Updates the avatar links in a contact only if needed
1763          *
1764          * @param int    $cid    Contact id
1765          * @param string $avatar Link to avatar picture
1766          * @param bool   $force  force picture update
1767          *
1768          * @return void
1769          * @throws HTTPException\InternalServerErrorException
1770          * @throws HTTPException\NotFoundException
1771          * @throws \ImagickException
1772          */
1773         public static function updateAvatar(int $cid, string $avatar, bool $force = false)
1774         {
1775                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'nurl'], ['id' => $cid, 'self' => false]);
1776                 if (!DBA::isResult($contact)) {
1777                         return;
1778                 }
1779
1780                 $uid = $contact['uid'];
1781
1782                 // Only update the cached photo links of public contacts when they already are cached
1783                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro'])) {
1784                         if ($contact['avatar'] != $avatar) {
1785                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1786                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1787                         }
1788                         return;
1789                 }
1790
1791                 $data = [
1792                         $contact['photo'] ?? '',
1793                         $contact['thumb'] ?? '',
1794                         $contact['micro'] ?? '',
1795                 ];
1796
1797                 $update = ($contact['avatar'] != $avatar) || $force;
1798
1799                 if (!$update) {
1800                         foreach ($data as $image_uri) {
1801                                 $image_rid = Photo::ridFromURI($image_uri);
1802                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1803                                         Logger::info('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1804                                         $update = true;
1805                                 }
1806                         }
1807                 }
1808
1809                 if ($update) {
1810                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1811                         if ($photos) {
1812                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1813                                 DBA::update('contact', $fields, ['id' => $cid]);
1814                         } elseif (empty($contact['avatar'])) {
1815                                 // Ensure that the avatar field is set
1816                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1817                                 Logger::info('Failed profile import', ['id' => $cid, 'force' => $force, 'avatar' => $avatar, 'contact' => $contact]);
1818                         }
1819                 }
1820         }
1821
1822         /**
1823          * Helper function for "updateFromProbe". Updates personal and public contact
1824          *
1825          * @param integer $id      contact id
1826          * @param integer $uid     user id
1827          * @param string  $url     The profile URL of the contact
1828          * @param array   $fields  The fields that are updated
1829          *
1830          * @throws \Exception
1831          */
1832         private static function updateContact($id, $uid, $url, array $fields)
1833         {
1834                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1835                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1836                         return;
1837                 }
1838
1839                 // Search for duplicated contacts and get rid of them
1840                 if (self::removeDuplicates(Strings::normaliseLink($url), $uid) || ($uid != 0)) {
1841                         return;
1842                 }
1843
1844                 // Archive or unarchive the contact. We only need to do this for the public contact.
1845                 // The archive/unarchive function will update the personal contacts by themselves.
1846                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1847                 if (!DBA::isResult($contact)) {
1848                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1849                         return;
1850                 }
1851
1852                 if (!empty($fields['success_update'])) {
1853                         self::unmarkForArchival($contact);
1854                 } elseif (!empty($fields['failure_update'])) {
1855                         self::markForArchival($contact);
1856                 }
1857
1858                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url), 'network' => Protocol::FEDERATED];
1859
1860                 // These contacts are sharing with us, we don't poll them.
1861                 // This means that we don't set the update fields in "OnePoll.php".
1862                 $condition['rel'] = self::SHARING;
1863                 DBA::update('contact', $fields, $condition);
1864
1865                 unset($fields['last-update']);
1866                 unset($fields['success_update']);
1867                 unset($fields['failure_update']);
1868
1869                 if (empty($fields)) {
1870                         return;
1871                 }
1872
1873                 // We are polling these contacts, so we mustn't set the update fields here.
1874                 $condition['rel'] = [self::FOLLOWER, self::FRIEND];
1875                 DBA::update('contact', $fields, $condition);
1876         }
1877
1878         /**
1879          * Remove duplicated contacts
1880          *
1881          * @param string  $nurl  Normalised contact url
1882          * @param integer $uid   User id
1883          * @return boolean
1884          * @throws \Exception
1885          */
1886         public static function removeDuplicates(string $nurl, int $uid)
1887         {
1888                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1889                 $count = DBA::count('contact', $condition);
1890                 if ($count <= 1) {
1891                         return false;
1892                 }
1893
1894                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1895                 if (!DBA::isResult($first_contact)) {
1896                         // Shouldn't happen - so we handle it
1897                         return false;
1898                 }
1899
1900                 $first = $first_contact['id'];
1901                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1902                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1903                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1904                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1905                         return false;
1906                 }
1907
1908                 // Find all duplicates
1909                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1910                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1911                 while ($duplicate = DBA::fetch($duplicates)) {
1912                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1913                                 continue;
1914                         }
1915
1916                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1917                 }
1918                 DBA::close($duplicates);
1919                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl]);
1920                 return true;
1921         }
1922
1923         /**
1924          * @param integer $id      contact id
1925          * @param string  $network Optional network we are probing for
1926          * @param boolean $force   Optional forcing of network probing (otherwise we use the cached data)
1927          * @return boolean
1928          * @throws HTTPException\InternalServerErrorException
1929          * @throws \ImagickException
1930          */
1931         public static function updateFromProbe(int $id, string $network = '', bool $force = false)
1932         {
1933                 /*
1934                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
1935                   This will reliably kill your communication with old Friendica contacts.
1936                  */
1937
1938                 // These fields aren't updated by this routine:
1939                 // 'xmpp', 'sensitive'
1940
1941                 $fields = ['uid', 'avatar', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
1942                         'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
1943                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey'];
1944                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
1945                 if (!DBA::isResult($contact)) {
1946                         return false;
1947                 }
1948
1949                 $uid = $contact['uid'];
1950                 unset($contact['uid']);
1951
1952                 $pubkey = $contact['pubkey'];
1953                 unset($contact['pubkey']);
1954
1955                 $contact['photo'] = $contact['avatar'];
1956                 unset($contact['avatar']);
1957
1958                 $ret = Probe::uri($contact['url'], $network, $uid, !$force);
1959
1960                 $updated = DateTimeFormat::utcNow();
1961
1962                 // We must not try to update relay contacts via probe. They are no real contacts.
1963                 // We check after the probing to be able to correct falsely detected contact types.
1964                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
1965                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
1966                         self::updateContact($id, $uid, $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
1967                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
1968                         return true;
1969                 }
1970
1971                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
1972                 if (in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]) && ($ret['network'] != $contact['network'])) {
1973                         if ($force && ($uid == 0)) {
1974                                 self::updateContact($id, $uid, $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
1975                         }
1976                         return false;
1977                 }
1978
1979                 if (Contact\Relation::isDiscoverable($ret['url'])) {
1980                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
1981                 }
1982
1983                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
1984                         $ret['unsearchable'] = $ret['hide'];
1985                 }
1986
1987                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
1988                         $ret['forum'] = false;
1989                         $ret['prv'] = false;
1990                         $ret['contact-type'] = $ret['account-type'];
1991                         if ($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1992                                 $apcontact = APContact::getByURL($ret['url'], false);
1993                                 if (isset($apcontact['manually-approve'])) {
1994                                         $ret['forum'] = (bool)!$apcontact['manually-approve'];
1995                                         $ret['prv'] = (bool)!$ret['forum'];
1996                                 }
1997                         }
1998                 }
1999
2000                 $new_pubkey = $ret['pubkey'];
2001
2002                 $update = false;
2003
2004                 // make sure to not overwrite existing values with blank entries except some technical fields
2005                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2006                 foreach ($ret as $key => $val) {
2007                         if (!array_key_exists($key, $contact)) {
2008                                 unset($ret[$key]);
2009                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2010                                 $ret[$key] = $contact[$key];
2011                         } elseif ($ret[$key] != $contact[$key]) {
2012                                 $update = true;
2013                         }
2014                 }
2015
2016                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2017                         self::updateAvatar($id, $ret['photo'], $update || $force);
2018                 }
2019
2020                 if (!$update) {
2021                         if ($force) {
2022                                 self::updateContact($id, $uid, $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2023                         }
2024
2025                         // Update the public contact
2026                         if ($uid != 0) {
2027                                 self::updateFromProbeByURL($ret['url']);
2028                         }
2029
2030                         return true;
2031                 }
2032
2033                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2034                 $ret['updated'] = $updated;
2035
2036                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2037                 if (empty($pubkey) && !empty($new_pubkey)) {
2038                         $ret['pubkey'] = $new_pubkey;
2039                 }
2040
2041                 if (($ret['addr'] != $contact['addr']) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2042                         $ret['uri-date'] = DateTimeFormat::utcNow();
2043                 }
2044
2045                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2046                         $ret['name-date'] = $updated;
2047                 }
2048
2049                 if ($force && ($uid == 0)) {
2050                         $ret['last-update'] = $updated;
2051                         $ret['success_update'] = $updated;
2052                         $ret['failed'] = false;
2053                 }
2054
2055                 unset($ret['photo']);
2056
2057                 self::updateContact($id, $uid, $ret['url'], $ret);
2058
2059                 return true;
2060         }
2061
2062         public static function updateFromProbeByURL($url, $force = false)
2063         {
2064                 $id = self::getIdForURL($url);
2065
2066                 if (empty($id)) {
2067                         return $id;
2068                 }
2069
2070                 self::updateFromProbe($id, '', $force);
2071
2072                 return $id;
2073         }
2074
2075         /**
2076          * Detects if a given contact array belongs to a legacy DFRN connection
2077          *
2078          * @param array $contact
2079          * @return boolean
2080          */
2081         public static function isLegacyDFRNContact($contact)
2082         {
2083                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2084                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2085         }
2086
2087         /**
2088          * Detects the communication protocol for a given contact url.
2089          * This is used to detect Friendica contacts that we can communicate via AP.
2090          *
2091          * @param string $url contact url
2092          * @param string $network Network of that contact
2093          * @return string with protocol
2094          */
2095         public static function getProtocol($url, $network)
2096         {
2097                 if ($network != Protocol::DFRN) {
2098                         return $network;
2099                 }
2100
2101                 $apcontact = APContact::getByURL($url);
2102                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2103                         return Protocol::ACTIVITYPUB;
2104                 } else {
2105                         return $network;
2106                 }
2107         }
2108
2109         /**
2110          * Takes a $uid and a url/handle and adds a new contact
2111          *
2112          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2113          * dfrn_request page.
2114          *
2115          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2116          *
2117          * Returns an array
2118          * $return['success'] boolean true if successful
2119          * $return['message'] error text if success is false.
2120          *
2121          * Takes a $uid and a url/handle and adds a new contact
2122          *
2123          * @param array  $user        The user the contact should be created for
2124          * @param string $url         The profile URL of the contact
2125          * @param bool   $interactive
2126          * @param string $network
2127          * @return array
2128          * @throws HTTPException\InternalServerErrorException
2129          * @throws HTTPException\NotFoundException
2130          * @throws \ImagickException
2131          */
2132         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2133         {
2134                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2135
2136                 // remove ajax junk, e.g. Twitter
2137                 $url = str_replace('/#!/', '/', $url);
2138
2139                 if (!Network::isUrlAllowed($url)) {
2140                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2141                         return $result;
2142                 }
2143
2144                 if (Network::isUrlBlocked($url)) {
2145                         $result['message'] = DI::l10n()->t('Blocked domain');
2146                         return $result;
2147                 }
2148
2149                 if (!$url) {
2150                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2151                         return $result;
2152                 }
2153
2154                 $arr = ['url' => $url, 'contact' => []];
2155
2156                 Hook::callAll('follow', $arr);
2157
2158                 if (empty($arr)) {
2159                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2160                         return $result;
2161                 }
2162
2163                 if (!empty($arr['contact']['name'])) {
2164                         $ret = $arr['contact'];
2165                 } else {
2166                         $ret = Probe::uri($url, $network, $user['uid'], false);
2167                 }
2168
2169                 if (($network != '') && ($ret['network'] != $network)) {
2170                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2171                         return $result;
2172                 }
2173
2174                 // check if we already have a contact
2175                 // the poll url is more reliable than the profile url, as we may have
2176                 // indirect links or webfinger links
2177
2178                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2179                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2180                 if (!DBA::isResult($contact)) {
2181                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2182                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2183                 }
2184
2185                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2186
2187                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2188                         if ($interactive) {
2189                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2190                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2191                                 } else {
2192                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2193                                 }
2194
2195                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2196
2197                                 // NOTREACHED
2198                         }
2199                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2200                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2201                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2202                         return $result;
2203                 }
2204
2205                 // This extra param just confuses things, remove it
2206                 if ($protocol === Protocol::DIASPORA) {
2207                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2208                 }
2209
2210                 // do we have enough information?
2211                 if (empty($ret['name']) || empty($ret['poll']) || (empty($ret['url']) && empty($ret['addr']))) {
2212                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2213                         if (empty($ret['poll'])) {
2214                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2215                         }
2216                         if (empty($ret['name'])) {
2217                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2218                         }
2219                         if (empty($ret['url'])) {
2220                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2221                         }
2222                         if (strpos($ret['url'], '@') !== false) {
2223                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2224                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2225                         }
2226                         return $result;
2227                 }
2228
2229                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2230                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2231                         $ret['notify'] = '';
2232                 }
2233
2234                 if (!$ret['notify']) {
2235                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2236                 }
2237
2238                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2239
2240                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2241
2242                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2243
2244                 $pending = false;
2245                 if ($protocol == Protocol::ACTIVITYPUB) {
2246                         $apcontact = APContact::getByURL($ret['url'], false);
2247                         if (isset($apcontact['manually-approve'])) {
2248                                 $pending = (bool)$apcontact['manually-approve'];
2249                         }
2250                 }
2251
2252                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2253                         $writeable = 1;
2254                 }
2255
2256                 if (DBA::isResult($contact)) {
2257                         // update contact
2258                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2259
2260                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2261                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2262                 } else {
2263                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2264
2265                         // create contact record
2266                         self::insert([
2267                                 'uid'     => $user['uid'],
2268                                 'created' => DateTimeFormat::utcNow(),
2269                                 'url'     => $ret['url'],
2270                                 'nurl'    => Strings::normaliseLink($ret['url']),
2271                                 'addr'    => $ret['addr'],
2272                                 'alias'   => $ret['alias'],
2273                                 'batch'   => $ret['batch'],
2274                                 'notify'  => $ret['notify'],
2275                                 'poll'    => $ret['poll'],
2276                                 'poco'    => $ret['poco'],
2277                                 'name'    => $ret['name'],
2278                                 'nick'    => $ret['nick'],
2279                                 'network' => $ret['network'],
2280                                 'baseurl' => $ret['baseurl'],
2281                                 'gsid'    => $ret['gsid'] ?? null,
2282                                 'protocol' => $protocol,
2283                                 'pubkey'  => $ret['pubkey'],
2284                                 'rel'     => $new_relation,
2285                                 'priority'=> $ret['priority'],
2286                                 'writable'=> $writeable,
2287                                 'hidden'  => $hidden,
2288                                 'blocked' => 0,
2289                                 'readonly'=> 0,
2290                                 'pending' => $pending,
2291                                 'subhub'  => $subhub
2292                         ]);
2293                 }
2294
2295                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2296                 if (!DBA::isResult($contact)) {
2297                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2298                         return $result;
2299                 }
2300
2301                 $contact_id = $contact['id'];
2302                 $result['cid'] = $contact_id;
2303
2304                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2305
2306                 // Update the avatar
2307                 self::updateAvatar($contact_id, $ret['photo']);
2308
2309                 // pull feed and consume it, which should subscribe to the hub.
2310
2311                 Worker::add(PRIORITY_HIGH, "OnePoll", $contact_id, "force");
2312
2313                 $owner = User::getOwnerDataById($user['uid']);
2314
2315                 if (DBA::isResult($owner)) {
2316                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2317                                 // create a follow slap
2318                                 $item = [];
2319                                 $item['verb'] = Activity::FOLLOW;
2320                                 $item['gravity'] = GRAVITY_ACTIVITY;
2321                                 $item['follow'] = $contact["url"];
2322                                 $item['body'] = '';
2323                                 $item['title'] = '';
2324                                 $item['guid'] = '';
2325                                 $item['uri-id'] = 0;
2326                                 $item['attach'] = '';
2327
2328                                 $slap = OStatus::salmon($item, $owner);
2329
2330                                 if (!empty($contact['notify'])) {
2331                                         Salmon::slapper($owner, $contact['notify'], $slap);
2332                                 }
2333                         } elseif ($protocol == Protocol::DIASPORA) {
2334                                 $ret = Diaspora::sendShare($owner, $contact);
2335                                 Logger::log('share returns: ' . $ret);
2336                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2337                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2338                                 if (empty($activity_id)) {
2339                                         // This really should never happen
2340                                         return false;
2341                                 }
2342
2343                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2344                                 Logger::log('Follow returns: ' . $ret);
2345                         }
2346                 }
2347
2348                 $result['success'] = true;
2349                 return $result;
2350         }
2351
2352         /**
2353          * Updated contact's SSL policy
2354          *
2355          * @param array  $contact    Contact array
2356          * @param string $new_policy New policy, valid: self,full
2357          *
2358          * @return array Contact array with updated values
2359          * @throws \Exception
2360          */
2361         public static function updateSslPolicy(array $contact, $new_policy)
2362         {
2363                 $ssl_changed = false;
2364                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2365                         $ssl_changed = true;
2366                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2367                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2368                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2369                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2370                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2371                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2372                 }
2373
2374                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2375                         $ssl_changed = true;
2376                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2377                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2378                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2379                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2380                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2381                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2382                 }
2383
2384                 if ($ssl_changed) {
2385                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2386                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2387                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2388                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2389                 }
2390
2391                 return $contact;
2392         }
2393
2394         /**
2395          * @param array  $importer Owner (local user) data
2396          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2397          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2398          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2399          * @param string $note     Introduction additional message
2400          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2401          * @throws HTTPException\InternalServerErrorException
2402          * @throws \ImagickException
2403          */
2404         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2405         {
2406                 // Should always be set
2407                 if (empty($datarray['author-id'])) {
2408                         return false;
2409                 }
2410
2411                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2412                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2413                 if (!DBA::isResult($pub_contact)) {
2414                         // Should never happen
2415                         return false;
2416                 }
2417
2418                 // Contact is blocked at node-level
2419                 if (self::isBlocked($datarray['author-id'])) {
2420                         return false;
2421                 }
2422
2423                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2424                 $name = $pub_contact['name'];
2425                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2426                 $nick = $pub_contact['nick'];
2427                 $network = $pub_contact['network'];
2428
2429                 // Ensure that we don't create a new contact when there already is one
2430                 $cid = self::getIdForURL($url, $importer['uid']);
2431                 if (!empty($cid)) {
2432                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2433                 }
2434
2435                 if (!empty($contact)) {
2436                         if (!empty($contact['pending'])) {
2437                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2438                                 return null;
2439                         }
2440
2441                         // Contact is blocked at user-level
2442                         if (!empty($contact['id']) && !empty($importer['id']) &&
2443                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2444                                 return false;
2445                         }
2446
2447                         // Make sure that the existing contact isn't archived
2448                         self::unmarkForArchival($contact);
2449
2450                         if (($contact['rel'] == self::SHARING)
2451                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2452                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2453                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2454                         }
2455
2456                         // Ensure to always have the correct network type, independent from the connection request method
2457                         self::updateFromProbe($contact['id'], '', true);
2458
2459                         return true;
2460                 } else {
2461                         // send email notification to owner?
2462                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2463                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2464                                 return null;
2465                         }
2466
2467                         // create contact record
2468                         DBA::insert('contact', [
2469                                 'uid'      => $importer['uid'],
2470                                 'created'  => DateTimeFormat::utcNow(),
2471                                 'url'      => $url,
2472                                 'nurl'     => Strings::normaliseLink($url),
2473                                 'name'     => $name,
2474                                 'nick'     => $nick,
2475                                 'network'  => $network,
2476                                 'rel'      => self::FOLLOWER,
2477                                 'blocked'  => 0,
2478                                 'readonly' => 0,
2479                                 'pending'  => 1,
2480                                 'writable' => 1,
2481                         ]);
2482
2483                         $contact_id = DBA::lastInsertId();
2484
2485                         // Ensure to always have the correct network type, independent from the connection request method
2486                         self::updateFromProbe($contact_id, '', true);
2487
2488                         self::updateAvatar($contact_id, $photo, true);
2489
2490                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2491
2492                         /// @TODO Encapsulate this into a function/method
2493                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2494                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2495                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2496                                 // create notification
2497                                 $hash = Strings::getRandomHex();
2498
2499                                 if (is_array($contact_record)) {
2500                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2501                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2502                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2503                                 }
2504
2505                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2506
2507                                 if (($user['notify-flags'] & Type::INTRO) &&
2508                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2509
2510                                         notification([
2511                                                 'type'         => Type::INTRO,
2512                                                 'notify_flags' => $user['notify-flags'],
2513                                                 'language'     => $user['language'],
2514                                                 'to_name'      => $user['username'],
2515                                                 'to_email'     => $user['email'],
2516                                                 'uid'          => $user['uid'],
2517                                                 'link'         => DI::baseUrl() . '/notifications/intros',
2518                                                 'source_name'  => ((strlen(stripslashes($contact_record['name']))) ? stripslashes($contact_record['name']) : DI::l10n()->t('[Name Withheld]')),
2519                                                 'source_link'  => $contact_record['url'],
2520                                                 'source_photo' => $contact_record['photo'],
2521                                                 'verb'         => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2522                                                 'otype'        => 'intro'
2523                                         ]);
2524                                 }
2525                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2526                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2527                                         self::createFromProbe($importer, $url, false, $network);
2528                                 }
2529
2530                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2531                                 $fields = ['pending' => false];
2532                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2533                                         $fields['rel'] = Contact::FRIEND;
2534                                 }
2535
2536                                 DBA::update('contact', $fields, $condition);
2537
2538                                 return true;
2539                         }
2540                 }
2541
2542                 return null;
2543         }
2544
2545         public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
2546         {
2547                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2548                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2549                 } else {
2550                         Contact::remove($contact['id']);
2551                 }
2552         }
2553
2554         public static function removeSharer($importer, $contact, array $datarray = [], $item = "")
2555         {
2556                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2557                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2558                 } else {
2559                         Contact::remove($contact['id']);
2560                 }
2561         }
2562
2563         /**
2564          * Create a birthday event.
2565          *
2566          * Update the year and the birthday.
2567          */
2568         public static function updateBirthdays()
2569         {
2570                 $condition = [
2571                         '`bd` != ""
2572                         AND `bd` > "0001-01-01"
2573                         AND SUBSTRING(`bd`, 1, 4) != `bdyear`
2574                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2575                         AND NOT `contact`.`pending`
2576                         AND NOT `contact`.`hidden`
2577                         AND NOT `contact`.`blocked`
2578                         AND NOT `contact`.`archive`
2579                         AND NOT `contact`.`deleted`',
2580                         Contact::SHARING,
2581                         Contact::FRIEND
2582                 ];
2583
2584                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2585
2586                 while ($contact = DBA::fetch($contacts)) {
2587                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2588
2589                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2590
2591                         if (Event::createBirthday($contact, $nextbd)) {
2592                                 // update bdyear
2593                                 DBA::update(
2594                                         'contact',
2595                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2596                                         ['id' => $contact['id']]
2597                                 );
2598                         }
2599                 }
2600                 DBA::close($contacts);
2601         }
2602
2603         /**
2604          * Remove the unavailable contact ids from the provided list
2605          *
2606          * @param array $contact_ids Contact id list
2607          * @return array
2608          * @throws \Exception
2609          */
2610         public static function pruneUnavailable(array $contact_ids)
2611         {
2612                 if (empty($contact_ids)) {
2613                         return [];
2614                 }
2615
2616                 $contacts = Contact::selectToArray(['id'], [
2617                         'id'      => $contact_ids,
2618                         'blocked' => false,
2619                         'pending' => false,
2620                         'archive' => false,
2621                 ]);
2622
2623                 return array_column($contacts, 'id');
2624         }
2625
2626         /**
2627          * Returns a magic link to authenticate remote visitors
2628          *
2629          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2630          *
2631          * @param string $contact_url The address of the target contact profile
2632          * @param string $url         An url that we will be redirected to after the authentication
2633          *
2634          * @return string with "redir" link
2635          * @throws HTTPException\InternalServerErrorException
2636          * @throws \ImagickException
2637          */
2638         public static function magicLink($contact_url, $url = '')
2639         {
2640                 if (!Session::isAuthenticated()) {
2641                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2642                 }
2643
2644                 $data = self::getProbeDataFromDatabase($contact_url);
2645                 if (empty($data)) {
2646                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2647                 }
2648
2649                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2650                 unset($data['uid']);
2651
2652                 return self::magicLinkByContact($data, $url ?: $contact_url);
2653         }
2654
2655         /**
2656          * Returns a magic link to authenticate remote visitors
2657          *
2658          * @param integer $cid The contact id of the target contact profile
2659          * @param string  $url An url that we will be redirected to after the authentication
2660          *
2661          * @return string with "redir" link
2662          * @throws HTTPException\InternalServerErrorException
2663          * @throws \ImagickException
2664          */
2665         public static function magicLinkbyId($cid, $url = '')
2666         {
2667                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2668
2669                 return self::magicLinkByContact($contact, $url);
2670         }
2671
2672         /**
2673          * Returns a magic link to authenticate remote visitors
2674          *
2675          * @param array  $contact The contact array with "uid", "network" and "url"
2676          * @param string $url     An url that we will be redirected to after the authentication
2677          *
2678          * @return string with "redir" link
2679          * @throws HTTPException\InternalServerErrorException
2680          * @throws \ImagickException
2681          */
2682         public static function magicLinkByContact($contact, $url = '')
2683         {
2684                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2685
2686                 if (!Session::isAuthenticated() || ($contact['network'] != Protocol::DFRN)) {
2687                         return $destination;
2688                 }
2689
2690                 // Only redirections to the same host do make sense
2691                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2692                         return $url;
2693                 }
2694
2695                 if (!empty($contact['uid'])) {
2696                         return self::magicLink($contact['url'], $url);
2697                 }
2698
2699                 if (empty($contact['id'])) {
2700                         return $destination;
2701                 }
2702
2703                 $redirect = 'redir/' . $contact['id'];
2704
2705                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2706                         $redirect .= '?url=' . $url;
2707                 }
2708
2709                 return $redirect;
2710         }
2711
2712         /**
2713          * Remove a contact from all groups
2714          *
2715          * @param integer $contact_id
2716          *
2717          * @return boolean Success
2718          */
2719         public static function removeFromGroups($contact_id)
2720         {
2721                 return DBA::delete('group_member', ['contact-id' => $contact_id]);
2722         }
2723
2724         /**
2725          * Is the contact a forum?
2726          *
2727          * @param integer $contactid ID of the contact
2728          *
2729          * @return boolean "true" if it is a forum
2730          */
2731         public static function isForum($contactid)
2732         {
2733                 $fields = ['forum', 'prv'];
2734                 $condition = ['id' => $contactid];
2735                 $contact = DBA::selectFirst('contact', $fields, $condition);
2736                 if (!DBA::isResult($contact)) {
2737                         return false;
2738                 }
2739
2740                 // Is it a forum?
2741                 return ($contact['forum'] || $contact['prv']);
2742         }
2743
2744         /**
2745          * Can the remote contact receive private messages?
2746          *
2747          * @param array $contact
2748          * @return bool
2749          */
2750         public static function canReceivePrivateMessages(array $contact)
2751         {
2752                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2753                 $self = $contact['self'] ?? false;
2754
2755                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2756         }
2757
2758         /**
2759          * Search contact table by nick or name
2760          *
2761          * @param string $search Name or nick
2762          * @param string $mode   Search mode (e.g. "community")
2763          *
2764          * @return array with search results
2765          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2766          */
2767         public static function searchByName($search, $mode = '')
2768         {
2769                 if (empty($search)) {
2770                         return [];
2771                 }
2772
2773                 // check supported networks
2774                 if (DI::config()->get('system', 'diaspora_enabled')) {
2775                         $diaspora = Protocol::DIASPORA;
2776                 } else {
2777                         $diaspora = Protocol::DFRN;
2778                 }
2779
2780                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2781                         $ostatus = Protocol::OSTATUS;
2782                 } else {
2783                         $ostatus = Protocol::DFRN;
2784                 }
2785
2786                 // check if we search only communities or every contact
2787                 if ($mode === 'community') {
2788                         $extra_sql = sprintf(' AND `contact-type` = %d', Contact::TYPE_COMMUNITY);
2789                 } else {
2790                         $extra_sql = '';
2791                 }
2792
2793                 $search .= '%';
2794
2795                 $results = DBA::p("SELECT * FROM `contact`
2796                         WHERE NOT `unsearchable` AND `network` IN (?, ?, ?, ?) AND
2797                                 NOT `failed` AND `uid` = ? AND
2798                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2799                                 ORDER BY `nurl` DESC LIMIT 1000",
2800                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, 0, $search, $search, $search
2801                 );
2802
2803                 $contacts = DBA::toArray($results);
2804                 return $contacts;
2805         }
2806
2807         /**
2808          * Add public contacts from an array
2809          *
2810          * @param array $urls
2811          * @return array result "count", "added" and "updated"
2812          */
2813         public static function addByUrls(array $urls)
2814         {
2815                 $added = 0;
2816                 $updated = 0;
2817                 $count = 0;
2818
2819                 foreach ($urls as $url) {
2820                         $contact = Contact::getByURL($url, false, ['id']);
2821                         if (empty($contact['id'])) {
2822                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
2823                                 ++$added;
2824                         } else {
2825                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
2826                                 ++$updated;
2827                         }
2828                         ++$count;
2829                 }
2830
2831                 return ['count' => $count, 'added' => $added, 'updated' => $updated];
2832         }
2833
2834         /**
2835          * Returns a random, global contact of the current node
2836          *
2837          * @return string The profile URL
2838          * @throws Exception
2839          */
2840         public static function getRandomUrl()
2841         {
2842                 $r = DBA::selectFirst('contact', ['url'], [
2843                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
2844                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
2845                 ], ['order' => ['RAND()']]);
2846
2847                 if (DBA::isResult($r)) {
2848                         return $r['url'];
2849                 }
2850
2851                 return '';
2852         }
2853 }