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          * @param boolean $in_loop   Internally used variable to prevent an endless loop
1162          *
1163          * @return integer Contact ID
1164          * @throws HTTPException\InternalServerErrorException
1165          * @throws \ImagickException
1166          */
1167         public static function getIdForURL($url, $uid = 0, $update = null, $default = [], $in_loop = false)
1168         {
1169                 Logger::info('Get contact data', ['url' => $url, 'user' => $uid]);
1170
1171                 $contact_id = 0;
1172
1173                 if ($url == '') {
1174                         return 0;
1175                 }
1176
1177                 $contact = self::getByURL($url, false, ['id', 'avatar', 'updated', 'network'], $uid);
1178
1179                 if (!empty($contact)) {
1180                         $contact_id = $contact["id"];
1181
1182                         if (empty($default) && in_array($contact['network'], [Protocol::MAIL, Protocol::PHANTOM]) && ($uid == 0)) {
1183                                 // Update public mail accounts via their user's accounts
1184                                 $fields = ['network', 'addr', 'name', 'nick', 'avatar', 'photo', 'thumb', 'micro'];
1185                                 $mailcontact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `network` = ? AND `uid` != 0", $url, Protocol::MAIL]);
1186                                 if (!DBA::isResult($mailcontact)) {
1187                                         $mailcontact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `network` = ? AND `uid` != 0", $url, Protocol::MAIL]);
1188                                 }
1189
1190                                 if (DBA::isResult($mailcontact)) {
1191                                         DBA::update('contact', $mailcontact, ['id' => $contact_id]);
1192                                 }
1193                         }
1194
1195                         if (empty($update)) {
1196                                 return $contact_id;
1197                         }
1198                 } elseif ($uid != 0) {
1199                         // Non-existing user-specific contact, exiting
1200                         return 0;
1201                 }
1202
1203                 if (!$update && empty($default)) {
1204                         // When we don't want to update, we look if we know this contact in any way
1205                         $data = self::getProbeDataFromDatabase($url, $contact_id);
1206                         $background_update = true;
1207                 } elseif (!$update && !empty($default['network'])) {
1208                         // If there are default values, take these
1209                         $data = $default;
1210                         $background_update = false;
1211                 } else {
1212                         $data = [];
1213                         $background_update = false;
1214                 }
1215
1216                 if ((empty($data) && is_null($update)) || $update) {
1217                         $data = Probe::uri($url, "", $uid);
1218                 }
1219
1220                 // Take the default values when probing failed
1221                 if (!empty($default) && (empty($data['network']) || !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO])))) {
1222                         $data = array_merge($data, $default);
1223                 }
1224
1225                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1226                         Logger::info('No valid network found', ['url' => $url, 'data' => $data, 'callstack' => System::callstack(20)]);
1227                         return 0;
1228                 }
1229
1230                 if (!empty($data['baseurl'])) {
1231                         $data['baseurl'] = GServer::cleanURL($data['baseurl']);
1232                 }
1233
1234                 if (!empty($data['baseurl']) && empty($data['gsid'])) {
1235                         $data['gsid'] = GServer::getID($data['baseurl']);
1236                 }
1237
1238                 if ($uid == 0) {
1239                         $data['last-item'] = Probe::getLastUpdate($data);
1240                         Logger::info('Fetched last item', ['url' => $data['url'], 'last-item' => $data['last-item']]);
1241                 }
1242
1243                 if (!$contact_id && !empty($data['alias']) && ($data['alias'] != $data['url']) && !$in_loop) {
1244                         $contact_id = self::getIdForURL($data["alias"], $uid, false, $default, true);
1245                 }
1246
1247                 if (!$contact_id) {
1248                         $fields = [
1249                                 'uid'       => $uid,
1250                                 'created'   => DateTimeFormat::utcNow(),
1251                                 'url'       => $data['url'],
1252                                 'nurl'      => Strings::normaliseLink($data['url']),
1253                                 'addr'      => $data['addr'] ?? '',
1254                                 'alias'     => $data['alias'] ?? '',
1255                                 'notify'    => $data['notify'] ?? '',
1256                                 'poll'      => $data['poll'] ?? '',
1257                                 'name'      => $data['name'] ?? '',
1258                                 'nick'      => $data['nick'] ?? '',
1259                                 'keywords'  => $data['keywords'] ?? '',
1260                                 'location'  => $data['location'] ?? '',
1261                                 'about'     => $data['about'] ?? '',
1262                                 'network'   => $data['network'],
1263                                 'pubkey'    => $data['pubkey'] ?? '',
1264                                 'rel'       => self::SHARING,
1265                                 'priority'  => $data['priority'] ?? 0,
1266                                 'batch'     => $data['batch'] ?? '',
1267                                 'request'   => $data['request'] ?? '',
1268                                 'confirm'   => $data['confirm'] ?? '',
1269                                 'poco'      => $data['poco'] ?? '',
1270                                 'baseurl'   => $data['baseurl'] ?? '',
1271                                 'gsid'      => $data['gsid'] ?? null,
1272                                 'name-date' => DateTimeFormat::utcNow(),
1273                                 'uri-date'  => DateTimeFormat::utcNow(),
1274                                 'avatar-date' => DateTimeFormat::utcNow(),
1275                                 'writable'  => 1,
1276                                 'blocked'   => 0,
1277                                 'readonly'  => 0,
1278                                 'pending'   => 0];
1279
1280                         if (!empty($data['last-item'])) {
1281                                 $fields['last-item'] = $data['last-item'];
1282                         }
1283
1284                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1285
1286                         // Before inserting we do check if the entry does exist now.
1287                         $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1288                         if (!DBA::isResult($contact)) {
1289                                 Logger::info('Create new contact', $fields);
1290
1291                                 self::insert($fields);
1292
1293                                 // We intentionally aren't using lastInsertId here. There is a chance for duplicates.
1294                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1295                                 if (!DBA::isResult($contact)) {
1296                                         Logger::info('Contact creation failed', $fields);
1297                                         // Shouldn't happen
1298                                         return 0;
1299                                 }
1300                         } else {
1301                                 Logger::info('Contact had been created before', ['id' => $contact["id"], 'url' => $url, 'contact' => $fields]);
1302                         }
1303
1304                         $contact_id = $contact["id"];
1305                 }
1306
1307                 if (!empty($data['photo']) && ($data['network'] != Protocol::FEED)) {
1308                         self::updateAvatar($contact_id, $data['photo']);
1309                 }
1310
1311                 if (in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1312                         if ($background_update) {
1313                                 // Update in the background when we fetched the data solely from the database
1314                                 Worker::add(PRIORITY_MEDIUM, "UpdateContact", $contact_id, ($uid == 0 ? 'force' : ''));
1315                         } else {
1316                                 // Else do a direct update
1317                                 self::updateFromProbe($contact_id, '', false);
1318                         }
1319                 } else {
1320                         $fields = ['url', 'nurl', 'addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'avatar-date', 'baseurl', 'gsid', 'last-item'];
1321                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact_id]);
1322
1323                         // This condition should always be true
1324                         if (!DBA::isResult($contact)) {
1325                                 return $contact_id;
1326                         }
1327
1328                         $updated = [
1329                                 'url' => $data['url'],
1330                                 'nurl' => Strings::normaliseLink($data['url']),
1331                                 'updated' => DateTimeFormat::utcNow(),
1332                                 'failed' => false
1333                         ];
1334
1335                         $fields = ['addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'baseurl', 'gsid'];
1336
1337                         foreach ($fields as $field) {
1338                                 $updated[$field] = ($data[$field] ?? '') ?: $contact[$field];
1339                         }
1340
1341                         if (!empty($data['last-item']) && ($contact['last-item'] < $data['last-item'])) {
1342                                 $updated['last-item'] = $data['last-item'];
1343                         }
1344
1345                         if (($updated['addr'] != $contact['addr']) || (!empty($data['alias']) && ($data['alias'] != $contact['alias']))) {
1346                                 $updated['uri-date'] = DateTimeFormat::utcNow();
1347                         }
1348
1349                         if (($data['name'] != $contact['name']) || ($data['nick'] != $contact['nick'])) {
1350                                 $updated['name-date'] = DateTimeFormat::utcNow();
1351                         }
1352
1353                         DBA::update('contact', $updated, ['id' => $contact_id], $contact);
1354                 }
1355
1356                 return $contact_id;
1357         }
1358
1359         /**
1360          * Checks if the contact is archived
1361          *
1362          * @param int $cid contact id
1363          *
1364          * @return boolean Is the contact archived?
1365          * @throws HTTPException\InternalServerErrorException
1366          */
1367         public static function isArchived(int $cid)
1368         {
1369                 if ($cid == 0) {
1370                         return false;
1371                 }
1372
1373                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1374                 if (!DBA::isResult($contact)) {
1375                         return false;
1376                 }
1377
1378                 if ($contact['archive']) {
1379                         return true;
1380                 }
1381
1382                 // Check status of ActivityPub endpoints
1383                 $apcontact = APContact::getByURL($contact['url'], false);
1384                 if (!empty($apcontact)) {
1385                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1386                                 return true;
1387                         }
1388
1389                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1390                                 return true;
1391                         }
1392                 }
1393
1394                 // Check status of Diaspora endpoints
1395                 if (!empty($contact['batch'])) {
1396                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1397                         return DBA::exists('contact', $condition);
1398                 }
1399
1400                 return false;
1401         }
1402
1403         /**
1404          * Checks if the contact is blocked
1405          *
1406          * @param int $cid contact id
1407          *
1408          * @return boolean Is the contact blocked?
1409          * @throws HTTPException\InternalServerErrorException
1410          */
1411         public static function isBlocked($cid)
1412         {
1413                 if ($cid == 0) {
1414                         return false;
1415                 }
1416
1417                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1418                 if (!DBA::isResult($blocked)) {
1419                         return false;
1420                 }
1421
1422                 if (Network::isUrlBlocked($blocked['url'])) {
1423                         return true;
1424                 }
1425
1426                 return (bool) $blocked['blocked'];
1427         }
1428
1429         /**
1430          * Checks if the contact is hidden
1431          *
1432          * @param int $cid contact id
1433          *
1434          * @return boolean Is the contact hidden?
1435          * @throws \Exception
1436          */
1437         public static function isHidden($cid)
1438         {
1439                 if ($cid == 0) {
1440                         return false;
1441                 }
1442
1443                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1444                 if (!DBA::isResult($hidden)) {
1445                         return false;
1446                 }
1447                 return (bool) $hidden['hidden'];
1448         }
1449
1450         /**
1451          * Returns posts from a given contact url
1452          *
1453          * @param string $contact_url Contact URL
1454          * @param bool   $thread_mode
1455          * @param int    $update
1456          * @return string posts in HTML
1457          * @throws \Exception
1458          */
1459         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0)
1460         {
1461                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update);
1462         }
1463
1464         /**
1465          * Returns posts from a given contact id
1466          *
1467          * @param integer $cid
1468          * @param bool    $thread_mode
1469          * @param integer $update
1470          * @return string posts in HTML
1471          * @throws \Exception
1472          */
1473         public static function getPostsFromId($cid, $thread_mode = false, $update = 0)
1474         {
1475                 $a = DI::app();
1476
1477                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1478                 if (!DBA::isResult($contact)) {
1479                         return '';
1480                 }
1481
1482                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1483                         $sql = "(`item`.`uid` = 0 OR (`item`.`uid` = ? AND NOT `item`.`global`))";
1484                 } else {
1485                         $sql = "`item`.`uid` = ?";
1486                 }
1487
1488                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1489
1490                 if ($thread_mode) {
1491                         $condition = ["`$contact_field` = ? AND `gravity` = ? AND " . $sql,
1492                                 $cid, GRAVITY_PARENT, local_user()];
1493                 } else {
1494                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1495                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1496                 }
1497
1498                 if (DI::mode()->isMobile()) {
1499                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1500                                 DI::config()->get('system', 'itemspage_network_mobile'));
1501                 } else {
1502                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1503                                 DI::config()->get('system', 'itemspage_network'));
1504                 }
1505
1506                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1507
1508                 $params = ['order' => ['received' => true],
1509                         'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1510
1511                 if ($thread_mode) {
1512                         $r = Item::selectThreadForUser(local_user(), ['uri'], $condition, $params);
1513
1514                         $items = Item::inArray($r);
1515
1516                         $o = conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1517                 } else {
1518                         $r = Item::selectForUser(local_user(), [], $condition, $params);
1519
1520                         $items = Item::inArray($r);
1521
1522                         $o = conversation($a, $items, 'contact-posts', false);
1523                 }
1524
1525                 if (!$update) {
1526                         $o .= $pager->renderMinimal(count($items));
1527                 }
1528
1529                 return $o;
1530         }
1531
1532         /**
1533          * Returns the account type name
1534          *
1535          * The function can be called with either the user or the contact array
1536          *
1537          * @param array $contact contact or user array
1538          * @return string
1539          */
1540         public static function getAccountType(array $contact)
1541         {
1542                 // There are several fields that indicate that the contact or user is a forum
1543                 // "page-flags" is a field in the user table,
1544                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1545                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1546                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1547                         || (isset($contact['forum']) && intval($contact['forum']))
1548                         || (isset($contact['prv']) && intval($contact['prv']))
1549                         || (isset($contact['community']) && intval($contact['community']))
1550                 ) {
1551                         $type = self::TYPE_COMMUNITY;
1552                 } else {
1553                         $type = self::TYPE_PERSON;
1554                 }
1555
1556                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1557                 if (isset($contact["contact-type"])) {
1558                         $type = $contact["contact-type"];
1559                 }
1560
1561                 if (isset($contact["account-type"])) {
1562                         $type = $contact["account-type"];
1563                 }
1564
1565                 switch ($type) {
1566                         case self::TYPE_ORGANISATION:
1567                                 $account_type = DI::l10n()->t("Organisation");
1568                                 break;
1569
1570                         case self::TYPE_NEWS:
1571                                 $account_type = DI::l10n()->t('News');
1572                                 break;
1573
1574                         case self::TYPE_COMMUNITY:
1575                                 $account_type = DI::l10n()->t("Forum");
1576                                 break;
1577
1578                         default:
1579                                 $account_type = "";
1580                                 break;
1581                 }
1582
1583                 return $account_type;
1584         }
1585
1586         /**
1587          * Blocks a contact
1588          *
1589          * @param int $cid
1590          * @return bool
1591          * @throws \Exception
1592          */
1593         public static function block($cid, $reason = null)
1594         {
1595                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1596
1597                 return $return;
1598         }
1599
1600         /**
1601          * Unblocks a contact
1602          *
1603          * @param int $cid
1604          * @return bool
1605          * @throws \Exception
1606          */
1607         public static function unblock($cid)
1608         {
1609                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1610
1611                 return $return;
1612         }
1613
1614         /**
1615          * Ensure that cached avatar exist
1616          *
1617          * @param integer $cid
1618          */
1619         public static function checkAvatarCache(int $cid)
1620         {
1621                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1622                 if (!DBA::isResult($contact)) {
1623                         return;
1624                 }
1625
1626                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1627                         return;
1628                 }
1629
1630                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1631
1632                 self::updateAvatar($cid, $contact['avatar'], true);
1633         }
1634
1635         /**
1636          * Return the photo path for a given contact array in the given size
1637          *
1638          * @param array $contact  contact array
1639          * @param string $field   Fieldname of the photo in the contact array
1640          * @param string $default Default path when no picture had been found
1641          * @param string $size    Size of the avatar picture
1642          * @param string $avatar  Avatar path that is displayed when no photo had been found
1643          * @return string photo path
1644          */
1645         private static function getAvatarPath(array $contact, string $field, string $default, string $size, string $avatar)
1646         {
1647                 if (!empty($contact)) {
1648                         $contact = self::checkAvatarCacheByArray($contact);
1649                         if (!empty($contact[$field])) {
1650                                 $avatar = $contact[$field];
1651                         }
1652                 }
1653
1654                 if (empty($avatar)) {
1655                         return $default;
1656                 }
1657
1658                 if (Proxy::isLocalImage($avatar)) {
1659                         return $avatar;
1660                 } else {
1661                         return Proxy::proxifyUrl($avatar, false, $size);
1662                 }
1663         }
1664
1665         /**
1666          * Return the photo path for a given contact array
1667          *
1668          * @param array $contact Contact array
1669          * @param string $avatar  Avatar path that is displayed when no photo had been found
1670          * @return string photo path
1671          */
1672         public static function getPhoto(array $contact, string $avatar = '')
1673         {
1674                 return self::getAvatarPath($contact, 'photo', DI::baseUrl() . '/images/person-300.jpg', Proxy::SIZE_SMALL, $avatar);
1675         }
1676
1677         /**
1678          * Return the photo path (thumb size) 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 getThumb(array $contact, string $avatar = '')
1685         {
1686                 return self::getAvatarPath($contact, 'thumb', DI::baseUrl() . '/images/person-80.jpg', Proxy::SIZE_THUMB, $avatar);
1687         }
1688
1689         /**
1690          * Return the photo path (micro 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 getMicro(array $contact, string $avatar = '')
1697         {
1698                 return self::getAvatarPath($contact, 'micro', DI::baseUrl() . '/images/person-48.jpg', Proxy::SIZE_MICRO, $avatar);
1699         }
1700
1701         /**
1702          * Check the given contact array for avatar cache fields
1703          *
1704          * @param array $contact
1705          * @return array contact array with avatar cache fields
1706          */
1707         private static function checkAvatarCacheByArray(array $contact)
1708         {
1709                 $update = false;
1710                 $contact_fields = [];
1711                 $fields = ['photo', 'thumb', 'micro'];
1712                 foreach ($fields as $field) {
1713                         if (isset($contact[$field])) {
1714                                 $contact_fields[] = $field;
1715                         }
1716                         if (isset($contact[$field]) && empty($contact[$field])) {
1717                                 $update = true;
1718                         }
1719                 }
1720
1721                 if (!$update) {
1722                         return $contact;
1723                 }
1724
1725                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1726                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1727
1728                         $new_contact = self::getById($contact['id'], $contact_fields);
1729                         if (DBA::isResult($new_contact)) {
1730                                 // We only update the cache fields
1731                                 $contact = array_merge($contact, $new_contact);
1732                         }
1733                 }
1734
1735                 /// add the default avatars if the fields aren't filled
1736                 if (isset($contact['photo']) && empty($contact['photo'])) {
1737                         $contact['photo'] = DI::baseUrl() . '/images/person-300.jpg';
1738                 }
1739                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1740                         $contact['thumb'] = DI::baseUrl() . '/images/person-80.jpg';
1741                 }
1742                 if (isset($contact['micro']) && empty($contact['micro'])) {
1743                         $contact['micro'] = DI::baseUrl() . '/images/person-48.jpg';
1744                 }
1745
1746                 return $contact;
1747         }
1748
1749         /**
1750          * Updates the avatar links in a contact only if needed
1751          *
1752          * @param int    $cid    Contact id
1753          * @param string $avatar Link to avatar picture
1754          * @param bool   $force  force picture update
1755          *
1756          * @return void
1757          * @throws HTTPException\InternalServerErrorException
1758          * @throws HTTPException\NotFoundException
1759          * @throws \ImagickException
1760          */
1761         public static function updateAvatar(int $cid, string $avatar, bool $force = false)
1762         {
1763                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'nurl'], ['id' => $cid, 'self' => false]);
1764                 if (!DBA::isResult($contact)) {
1765                         return;
1766                 }
1767
1768                 $uid = $contact['uid'];
1769
1770                 // Only update the cached photo links of public contacts when they already are cached
1771                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro'])) {
1772                         if ($contact['avatar'] != $avatar) {
1773                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1774                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1775                         }
1776                         return;
1777                 }
1778
1779                 $data = [
1780                         $contact['photo'] ?? '',
1781                         $contact['thumb'] ?? '',
1782                         $contact['micro'] ?? '',
1783                 ];
1784
1785                 $update = ($contact['avatar'] != $avatar) || $force;
1786
1787                 if (!$update) {
1788                         foreach ($data as $image_uri) {
1789                                 $image_rid = Photo::ridFromURI($image_uri);
1790                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1791                                         Logger::info('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1792                                         $update = true;
1793                                 }
1794                         }
1795                 }
1796
1797                 if ($update) {
1798                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1799                         if ($photos) {
1800                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1801                                 DBA::update('contact', $fields, ['id' => $cid]);
1802                         } elseif (empty($contact['avatar'])) {
1803                                 // Ensure that the avatar field is set
1804                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1805                                 Logger::info('Failed profile import', ['id' => $cid, 'force' => $force, 'avatar' => $avatar, 'contact' => $contact]);
1806                         }
1807                 }
1808         }
1809
1810         /**
1811          * Helper function for "updateFromProbe". Updates personal and public contact
1812          *
1813          * @param integer $id      contact id
1814          * @param integer $uid     user id
1815          * @param string  $url     The profile URL of the contact
1816          * @param array   $fields  The fields that are updated
1817          *
1818          * @throws \Exception
1819          */
1820         private static function updateContact($id, $uid, $url, array $fields)
1821         {
1822                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1823                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1824                         return;
1825                 }
1826
1827                 // Search for duplicated contacts and get rid of them
1828                 if (self::removeDuplicates(Strings::normaliseLink($url), $uid) || ($uid != 0)) {
1829                         return;
1830                 }
1831
1832                 // Archive or unarchive the contact. We only need to do this for the public contact.
1833                 // The archive/unarchive function will update the personal contacts by themselves.
1834                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1835                 if (!DBA::isResult($contact)) {
1836                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1837                         return;
1838                 }
1839
1840                 if (!empty($fields['success_update'])) {
1841                         self::unmarkForArchival($contact);
1842                 } elseif (!empty($fields['failure_update'])) {
1843                         self::markForArchival($contact);
1844                 }
1845
1846                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url), 'network' => Protocol::FEDERATED];
1847
1848                 // These contacts are sharing with us, we don't poll them.
1849                 // This means that we don't set the update fields in "OnePoll.php".
1850                 $condition['rel'] = self::SHARING;
1851                 DBA::update('contact', $fields, $condition);
1852
1853                 unset($fields['last-update']);
1854                 unset($fields['success_update']);
1855                 unset($fields['failure_update']);
1856
1857                 if (empty($fields)) {
1858                         return;
1859                 }
1860
1861                 // We are polling these contacts, so we mustn't set the update fields here.
1862                 $condition['rel'] = [self::FOLLOWER, self::FRIEND];
1863                 DBA::update('contact', $fields, $condition);
1864         }
1865
1866         /**
1867          * Remove duplicated contacts
1868          *
1869          * @param string  $nurl  Normalised contact url
1870          * @param integer $uid   User id
1871          * @return boolean
1872          * @throws \Exception
1873          */
1874         public static function removeDuplicates(string $nurl, int $uid)
1875         {
1876                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1877                 $count = DBA::count('contact', $condition);
1878                 if ($count <= 1) {
1879                         return false;
1880                 }
1881
1882                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1883                 if (!DBA::isResult($first_contact)) {
1884                         // Shouldn't happen - so we handle it
1885                         return false;
1886                 }
1887
1888                 $first = $first_contact['id'];
1889                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1890                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1891                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1892                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1893                         return false;
1894                 }
1895
1896                 // Find all duplicates
1897                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1898                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1899                 while ($duplicate = DBA::fetch($duplicates)) {
1900                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1901                                 continue;
1902                         }
1903
1904                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1905                 }
1906                 DBA::close($duplicates);
1907                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl]);
1908                 return true;
1909         }
1910
1911         /**
1912          * @param integer $id      contact id
1913          * @param string  $network Optional network we are probing for
1914          * @param boolean $force   Optional forcing of network probing (otherwise we use the cached data)
1915          * @return boolean
1916          * @throws HTTPException\InternalServerErrorException
1917          * @throws \ImagickException
1918          */
1919         public static function updateFromProbe(int $id, string $network = '', bool $force = false)
1920         {
1921                 /*
1922                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
1923                   This will reliably kill your communication with old Friendica contacts.
1924                  */
1925
1926                 // These fields aren't updated by this routine:
1927                 // 'xmpp', 'sensitive'
1928
1929                 $fields = ['uid', 'avatar', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
1930                         'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
1931                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey'];
1932                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
1933                 if (!DBA::isResult($contact)) {
1934                         return false;
1935                 }
1936
1937                 $uid = $contact['uid'];
1938                 unset($contact['uid']);
1939
1940                 $pubkey = $contact['pubkey'];
1941                 unset($contact['pubkey']);
1942
1943                 $contact['photo'] = $contact['avatar'];
1944                 unset($contact['avatar']);
1945
1946                 $ret = Probe::uri($contact['url'], $network, $uid, !$force);
1947
1948                 $updated = DateTimeFormat::utcNow();
1949
1950                 // We must not try to update relay contacts via probe. They are no real contacts.
1951                 // We check after the probing to be able to correct falsely detected contact types.
1952                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
1953                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
1954                         self::updateContact($id, $uid, $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
1955                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
1956                         return true;
1957                 }
1958
1959                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
1960                 if (in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]) && ($ret['network'] != $contact['network'])) {
1961                         if ($force && ($uid == 0)) {
1962                                 self::updateContact($id, $uid, $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
1963                         }
1964                         return false;
1965                 }
1966
1967                 if (Contact\Relation::isDiscoverable($ret['url'])) {
1968                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
1969                 }
1970
1971                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
1972                         $ret['unsearchable'] = $ret['hide'];
1973                 }
1974
1975                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
1976                         $ret['forum'] = false;
1977                         $ret['prv'] = false;
1978                         $ret['contact-type'] = $ret['account-type'];
1979                         if ($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1980                                 $apcontact = APContact::getByURL($ret['url'], false);
1981                                 if (isset($apcontact['manually-approve'])) {
1982                                         $ret['forum'] = (bool)!$apcontact['manually-approve'];
1983                                         $ret['prv'] = (bool)!$ret['forum'];
1984                                 }
1985                         }
1986                 }
1987
1988                 $new_pubkey = $ret['pubkey'];
1989
1990                 $update = false;
1991
1992                 // make sure to not overwrite existing values with blank entries except some technical fields
1993                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
1994                 foreach ($ret as $key => $val) {
1995                         if (!array_key_exists($key, $contact)) {
1996                                 unset($ret[$key]);
1997                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
1998                                 $ret[$key] = $contact[$key];
1999                         } elseif ($ret[$key] != $contact[$key]) {
2000                                 $update = true;
2001                         }
2002                 }
2003
2004                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2005                         self::updateAvatar($id, $ret['photo'], $update || $force);
2006                 }
2007
2008                 if (!$update) {
2009                         if ($force) {
2010                                 self::updateContact($id, $uid, $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2011                         }
2012
2013                         // Update the public contact
2014                         if ($uid != 0) {
2015                                 self::updateFromProbeByURL($ret['url']);
2016                         }
2017
2018                         return true;
2019                 }
2020
2021                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2022                 $ret['updated'] = $updated;
2023
2024                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2025                 if (empty($pubkey) && !empty($new_pubkey)) {
2026                         $ret['pubkey'] = $new_pubkey;
2027                 }
2028
2029                 if (($ret['addr'] != $contact['addr']) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2030                         $ret['uri-date'] = DateTimeFormat::utcNow();
2031                 }
2032
2033                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2034                         $ret['name-date'] = $updated;
2035                 }
2036
2037                 if ($force && ($uid == 0)) {
2038                         $ret['last-update'] = $updated;
2039                         $ret['success_update'] = $updated;
2040                         $ret['failed'] = false;
2041                 }
2042
2043                 unset($ret['photo']);
2044
2045                 self::updateContact($id, $uid, $ret['url'], $ret);
2046
2047                 return true;
2048         }
2049
2050         public static function updateFromProbeByURL($url, $force = false)
2051         {
2052                 $id = self::getIdForURL($url);
2053
2054                 if (empty($id)) {
2055                         return $id;
2056                 }
2057
2058                 self::updateFromProbe($id, '', $force);
2059
2060                 return $id;
2061         }
2062
2063         /**
2064          * Detects if a given contact array belongs to a legacy DFRN connection
2065          *
2066          * @param array $contact
2067          * @return boolean
2068          */
2069         public static function isLegacyDFRNContact($contact)
2070         {
2071                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2072                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2073         }
2074
2075         /**
2076          * Detects the communication protocol for a given contact url.
2077          * This is used to detect Friendica contacts that we can communicate via AP.
2078          *
2079          * @param string $url contact url
2080          * @param string $network Network of that contact
2081          * @return string with protocol
2082          */
2083         public static function getProtocol($url, $network)
2084         {
2085                 if ($network != Protocol::DFRN) {
2086                         return $network;
2087                 }
2088
2089                 $apcontact = APContact::getByURL($url);
2090                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2091                         return Protocol::ACTIVITYPUB;
2092                 } else {
2093                         return $network;
2094                 }
2095         }
2096
2097         /**
2098          * Takes a $uid and a url/handle and adds a new contact
2099          *
2100          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2101          * dfrn_request page.
2102          *
2103          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2104          *
2105          * Returns an array
2106          * $return['success'] boolean true if successful
2107          * $return['message'] error text if success is false.
2108          *
2109          * Takes a $uid and a url/handle and adds a new contact
2110          *
2111          * @param array  $user        The user the contact should be created for
2112          * @param string $url         The profile URL of the contact
2113          * @param bool   $interactive
2114          * @param string $network
2115          * @return array
2116          * @throws HTTPException\InternalServerErrorException
2117          * @throws HTTPException\NotFoundException
2118          * @throws \ImagickException
2119          */
2120         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2121         {
2122                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2123
2124                 // remove ajax junk, e.g. Twitter
2125                 $url = str_replace('/#!/', '/', $url);
2126
2127                 if (!Network::isUrlAllowed($url)) {
2128                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2129                         return $result;
2130                 }
2131
2132                 if (Network::isUrlBlocked($url)) {
2133                         $result['message'] = DI::l10n()->t('Blocked domain');
2134                         return $result;
2135                 }
2136
2137                 if (!$url) {
2138                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2139                         return $result;
2140                 }
2141
2142                 $arr = ['url' => $url, 'contact' => []];
2143
2144                 Hook::callAll('follow', $arr);
2145
2146                 if (empty($arr)) {
2147                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2148                         return $result;
2149                 }
2150
2151                 if (!empty($arr['contact']['name'])) {
2152                         $ret = $arr['contact'];
2153                 } else {
2154                         $ret = Probe::uri($url, $network, $user['uid'], false);
2155                 }
2156
2157                 if (($network != '') && ($ret['network'] != $network)) {
2158                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2159                         return $result;
2160                 }
2161
2162                 // check if we already have a contact
2163                 // the poll url is more reliable than the profile url, as we may have
2164                 // indirect links or webfinger links
2165
2166                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2167                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2168                 if (!DBA::isResult($contact)) {
2169                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2170                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2171                 }
2172
2173                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2174
2175                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2176                         if ($interactive) {
2177                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2178                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2179                                 } else {
2180                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2181                                 }
2182
2183                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2184
2185                                 // NOTREACHED
2186                         }
2187                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2188                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2189                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2190                         return $result;
2191                 }
2192
2193                 // This extra param just confuses things, remove it
2194                 if ($protocol === Protocol::DIASPORA) {
2195                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2196                 }
2197
2198                 // do we have enough information?
2199                 if (empty($ret['name']) || empty($ret['poll']) || (empty($ret['url']) && empty($ret['addr']))) {
2200                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2201                         if (empty($ret['poll'])) {
2202                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2203                         }
2204                         if (empty($ret['name'])) {
2205                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2206                         }
2207                         if (empty($ret['url'])) {
2208                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2209                         }
2210                         if (strpos($ret['url'], '@') !== false) {
2211                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2212                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2213                         }
2214                         return $result;
2215                 }
2216
2217                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2218                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2219                         $ret['notify'] = '';
2220                 }
2221
2222                 if (!$ret['notify']) {
2223                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2224                 }
2225
2226                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2227
2228                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2229
2230                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2231
2232                 $pending = false;
2233                 if ($protocol == Protocol::ACTIVITYPUB) {
2234                         $apcontact = APContact::getByURL($ret['url'], false);
2235                         if (isset($apcontact['manually-approve'])) {
2236                                 $pending = (bool)$apcontact['manually-approve'];
2237                         }
2238                 }
2239
2240                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2241                         $writeable = 1;
2242                 }
2243
2244                 if (DBA::isResult($contact)) {
2245                         // update contact
2246                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2247
2248                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2249                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2250                 } else {
2251                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2252
2253                         // create contact record
2254                         self::insert([
2255                                 'uid'     => $user['uid'],
2256                                 'created' => DateTimeFormat::utcNow(),
2257                                 'url'     => $ret['url'],
2258                                 'nurl'    => Strings::normaliseLink($ret['url']),
2259                                 'addr'    => $ret['addr'],
2260                                 'alias'   => $ret['alias'],
2261                                 'batch'   => $ret['batch'],
2262                                 'notify'  => $ret['notify'],
2263                                 'poll'    => $ret['poll'],
2264                                 'poco'    => $ret['poco'],
2265                                 'name'    => $ret['name'],
2266                                 'nick'    => $ret['nick'],
2267                                 'network' => $ret['network'],
2268                                 'baseurl' => $ret['baseurl'],
2269                                 'gsid'    => $ret['gsid'] ?? null,
2270                                 'protocol' => $protocol,
2271                                 'pubkey'  => $ret['pubkey'],
2272                                 'rel'     => $new_relation,
2273                                 'priority'=> $ret['priority'],
2274                                 'writable'=> $writeable,
2275                                 'hidden'  => $hidden,
2276                                 'blocked' => 0,
2277                                 'readonly'=> 0,
2278                                 'pending' => $pending,
2279                                 'subhub'  => $subhub
2280                         ]);
2281                 }
2282
2283                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2284                 if (!DBA::isResult($contact)) {
2285                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2286                         return $result;
2287                 }
2288
2289                 $contact_id = $contact['id'];
2290                 $result['cid'] = $contact_id;
2291
2292                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2293
2294                 // Update the avatar
2295                 self::updateAvatar($contact_id, $ret['photo']);
2296
2297                 // pull feed and consume it, which should subscribe to the hub.
2298
2299                 Worker::add(PRIORITY_HIGH, "OnePoll", $contact_id, "force");
2300
2301                 $owner = User::getOwnerDataById($user['uid']);
2302
2303                 if (DBA::isResult($owner)) {
2304                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2305                                 // create a follow slap
2306                                 $item = [];
2307                                 $item['verb'] = Activity::FOLLOW;
2308                                 $item['gravity'] = GRAVITY_ACTIVITY;
2309                                 $item['follow'] = $contact["url"];
2310                                 $item['body'] = '';
2311                                 $item['title'] = '';
2312                                 $item['guid'] = '';
2313                                 $item['uri-id'] = 0;
2314                                 $item['attach'] = '';
2315
2316                                 $slap = OStatus::salmon($item, $owner);
2317
2318                                 if (!empty($contact['notify'])) {
2319                                         Salmon::slapper($owner, $contact['notify'], $slap);
2320                                 }
2321                         } elseif ($protocol == Protocol::DIASPORA) {
2322                                 $ret = Diaspora::sendShare($owner, $contact);
2323                                 Logger::log('share returns: ' . $ret);
2324                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2325                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2326                                 if (empty($activity_id)) {
2327                                         // This really should never happen
2328                                         return false;
2329                                 }
2330
2331                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2332                                 Logger::log('Follow returns: ' . $ret);
2333                         }
2334                 }
2335
2336                 $result['success'] = true;
2337                 return $result;
2338         }
2339
2340         /**
2341          * Updated contact's SSL policy
2342          *
2343          * @param array  $contact    Contact array
2344          * @param string $new_policy New policy, valid: self,full
2345          *
2346          * @return array Contact array with updated values
2347          * @throws \Exception
2348          */
2349         public static function updateSslPolicy(array $contact, $new_policy)
2350         {
2351                 $ssl_changed = false;
2352                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2353                         $ssl_changed = true;
2354                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2355                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2356                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2357                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2358                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2359                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2360                 }
2361
2362                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2363                         $ssl_changed = true;
2364                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2365                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2366                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2367                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2368                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2369                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2370                 }
2371
2372                 if ($ssl_changed) {
2373                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2374                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2375                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2376                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2377                 }
2378
2379                 return $contact;
2380         }
2381
2382         /**
2383          * @param array  $importer Owner (local user) data
2384          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2385          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2386          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2387          * @param string $note     Introduction additional message
2388          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2389          * @throws HTTPException\InternalServerErrorException
2390          * @throws \ImagickException
2391          */
2392         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2393         {
2394                 // Should always be set
2395                 if (empty($datarray['author-id'])) {
2396                         return false;
2397                 }
2398
2399                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2400                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2401                 if (!DBA::isResult($pub_contact)) {
2402                         // Should never happen
2403                         return false;
2404                 }
2405
2406                 // Contact is blocked at node-level
2407                 if (self::isBlocked($datarray['author-id'])) {
2408                         return false;
2409                 }
2410
2411                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2412                 $name = $pub_contact['name'];
2413                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2414                 $nick = $pub_contact['nick'];
2415                 $network = $pub_contact['network'];
2416
2417                 // Ensure that we don't create a new contact when there already is one
2418                 $cid = self::getIdForURL($url, $importer['uid']);
2419                 if (!empty($cid)) {
2420                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2421                 }
2422
2423                 if (!empty($contact)) {
2424                         if (!empty($contact['pending'])) {
2425                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2426                                 return null;
2427                         }
2428
2429                         // Contact is blocked at user-level
2430                         if (!empty($contact['id']) && !empty($importer['id']) &&
2431                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2432                                 return false;
2433                         }
2434
2435                         // Make sure that the existing contact isn't archived
2436                         self::unmarkForArchival($contact);
2437
2438                         if (($contact['rel'] == self::SHARING)
2439                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2440                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2441                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2442                         }
2443
2444                         // Ensure to always have the correct network type, independent from the connection request method
2445                         self::updateFromProbe($contact['id'], '', true);
2446
2447                         return true;
2448                 } else {
2449                         // send email notification to owner?
2450                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2451                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2452                                 return null;
2453                         }
2454
2455                         // create contact record
2456                         DBA::insert('contact', [
2457                                 'uid'      => $importer['uid'],
2458                                 'created'  => DateTimeFormat::utcNow(),
2459                                 'url'      => $url,
2460                                 'nurl'     => Strings::normaliseLink($url),
2461                                 'name'     => $name,
2462                                 'nick'     => $nick,
2463                                 'network'  => $network,
2464                                 'rel'      => self::FOLLOWER,
2465                                 'blocked'  => 0,
2466                                 'readonly' => 0,
2467                                 'pending'  => 1,
2468                                 'writable' => 1,
2469                         ]);
2470
2471                         $contact_id = DBA::lastInsertId();
2472
2473                         // Ensure to always have the correct network type, independent from the connection request method
2474                         self::updateFromProbe($contact_id, '', true);
2475
2476                         self::updateAvatar($contact_id, $photo, true);
2477
2478                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2479
2480                         /// @TODO Encapsulate this into a function/method
2481                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2482                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2483                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2484                                 // create notification
2485                                 $hash = Strings::getRandomHex();
2486
2487                                 if (is_array($contact_record)) {
2488                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2489                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2490                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2491                                 }
2492
2493                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2494
2495                                 if (($user['notify-flags'] & Type::INTRO) &&
2496                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2497
2498                                         notification([
2499                                                 'type'         => Type::INTRO,
2500                                                 'notify_flags' => $user['notify-flags'],
2501                                                 'language'     => $user['language'],
2502                                                 'to_name'      => $user['username'],
2503                                                 'to_email'     => $user['email'],
2504                                                 'uid'          => $user['uid'],
2505                                                 'link'         => DI::baseUrl() . '/notifications/intros',
2506                                                 'source_name'  => ((strlen(stripslashes($contact_record['name']))) ? stripslashes($contact_record['name']) : DI::l10n()->t('[Name Withheld]')),
2507                                                 'source_link'  => $contact_record['url'],
2508                                                 'source_photo' => $contact_record['photo'],
2509                                                 'verb'         => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2510                                                 'otype'        => 'intro'
2511                                         ]);
2512                                 }
2513                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2514                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2515                                         self::createFromProbe($importer, $url, false, $network);
2516                                 }
2517
2518                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2519                                 $fields = ['pending' => false];
2520                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2521                                         $fields['rel'] = Contact::FRIEND;
2522                                 }
2523
2524                                 DBA::update('contact', $fields, $condition);
2525
2526                                 return true;
2527                         }
2528                 }
2529
2530                 return null;
2531         }
2532
2533         public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
2534         {
2535                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2536                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2537                 } else {
2538                         Contact::remove($contact['id']);
2539                 }
2540         }
2541
2542         public static function removeSharer($importer, $contact, array $datarray = [], $item = "")
2543         {
2544                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2545                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2546                 } else {
2547                         Contact::remove($contact['id']);
2548                 }
2549         }
2550
2551         /**
2552          * Create a birthday event.
2553          *
2554          * Update the year and the birthday.
2555          */
2556         public static function updateBirthdays()
2557         {
2558                 $condition = [
2559                         '`bd` != ""
2560                         AND `bd` > "0001-01-01"
2561                         AND SUBSTRING(`bd`, 1, 4) != `bdyear`
2562                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2563                         AND NOT `contact`.`pending`
2564                         AND NOT `contact`.`hidden`
2565                         AND NOT `contact`.`blocked`
2566                         AND NOT `contact`.`archive`
2567                         AND NOT `contact`.`deleted`',
2568                         Contact::SHARING,
2569                         Contact::FRIEND
2570                 ];
2571
2572                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2573
2574                 while ($contact = DBA::fetch($contacts)) {
2575                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2576
2577                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2578
2579                         if (Event::createBirthday($contact, $nextbd)) {
2580                                 // update bdyear
2581                                 DBA::update(
2582                                         'contact',
2583                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2584                                         ['id' => $contact['id']]
2585                                 );
2586                         }
2587                 }
2588                 DBA::close($contacts);
2589         }
2590
2591         /**
2592          * Remove the unavailable contact ids from the provided list
2593          *
2594          * @param array $contact_ids Contact id list
2595          * @return array
2596          * @throws \Exception
2597          */
2598         public static function pruneUnavailable(array $contact_ids)
2599         {
2600                 if (empty($contact_ids)) {
2601                         return [];
2602                 }
2603
2604                 $contacts = Contact::selectToArray(['id'], [
2605                         'id'      => $contact_ids,
2606                         'blocked' => false,
2607                         'pending' => false,
2608                         'archive' => false,
2609                 ]);
2610
2611                 return array_column($contacts, 'id');
2612         }
2613
2614         /**
2615          * Returns a magic link to authenticate remote visitors
2616          *
2617          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2618          *
2619          * @param string $contact_url The address of the target contact profile
2620          * @param string $url         An url that we will be redirected to after the authentication
2621          *
2622          * @return string with "redir" link
2623          * @throws HTTPException\InternalServerErrorException
2624          * @throws \ImagickException
2625          */
2626         public static function magicLink($contact_url, $url = '')
2627         {
2628                 if (!Session::isAuthenticated()) {
2629                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2630                 }
2631
2632                 $data = self::getProbeDataFromDatabase($contact_url);
2633                 if (empty($data)) {
2634                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2635                 }
2636
2637                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2638                 unset($data['uid']);
2639
2640                 return self::magicLinkByContact($data, $url ?: $contact_url);
2641         }
2642
2643         /**
2644          * Returns a magic link to authenticate remote visitors
2645          *
2646          * @param integer $cid The contact id of the target contact profile
2647          * @param string  $url An url that we will be redirected to after the authentication
2648          *
2649          * @return string with "redir" link
2650          * @throws HTTPException\InternalServerErrorException
2651          * @throws \ImagickException
2652          */
2653         public static function magicLinkbyId($cid, $url = '')
2654         {
2655                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2656
2657                 return self::magicLinkByContact($contact, $url);
2658         }
2659
2660         /**
2661          * Returns a magic link to authenticate remote visitors
2662          *
2663          * @param array  $contact The contact array with "uid", "network" and "url"
2664          * @param string $url     An url that we will be redirected to after the authentication
2665          *
2666          * @return string with "redir" link
2667          * @throws HTTPException\InternalServerErrorException
2668          * @throws \ImagickException
2669          */
2670         public static function magicLinkByContact($contact, $url = '')
2671         {
2672                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2673
2674                 if (!Session::isAuthenticated() || ($contact['network'] != Protocol::DFRN)) {
2675                         return $destination;
2676                 }
2677
2678                 // Only redirections to the same host do make sense
2679                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2680                         return $url;
2681                 }
2682
2683                 if (!empty($contact['uid'])) {
2684                         return self::magicLink($contact['url'], $url);
2685                 }
2686
2687                 if (empty($contact['id'])) {
2688                         return $destination;
2689                 }
2690
2691                 $redirect = 'redir/' . $contact['id'];
2692
2693                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2694                         $redirect .= '?url=' . $url;
2695                 }
2696
2697                 return $redirect;
2698         }
2699
2700         /**
2701          * Remove a contact from all groups
2702          *
2703          * @param integer $contact_id
2704          *
2705          * @return boolean Success
2706          */
2707         public static function removeFromGroups($contact_id)
2708         {
2709                 return DBA::delete('group_member', ['contact-id' => $contact_id]);
2710         }
2711
2712         /**
2713          * Is the contact a forum?
2714          *
2715          * @param integer $contactid ID of the contact
2716          *
2717          * @return boolean "true" if it is a forum
2718          */
2719         public static function isForum($contactid)
2720         {
2721                 $fields = ['forum', 'prv'];
2722                 $condition = ['id' => $contactid];
2723                 $contact = DBA::selectFirst('contact', $fields, $condition);
2724                 if (!DBA::isResult($contact)) {
2725                         return false;
2726                 }
2727
2728                 // Is it a forum?
2729                 return ($contact['forum'] || $contact['prv']);
2730         }
2731
2732         /**
2733          * Can the remote contact receive private messages?
2734          *
2735          * @param array $contact
2736          * @return bool
2737          */
2738         public static function canReceivePrivateMessages(array $contact)
2739         {
2740                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2741                 $self = $contact['self'] ?? false;
2742
2743                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2744         }
2745
2746         /**
2747          * Search contact table by nick or name
2748          *
2749          * @param string $search Name or nick
2750          * @param string $mode   Search mode (e.g. "community")
2751          *
2752          * @return array with search results
2753          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2754          */
2755         public static function searchByName($search, $mode = '')
2756         {
2757                 if (empty($search)) {
2758                         return [];
2759                 }
2760
2761                 // check supported networks
2762                 if (DI::config()->get('system', 'diaspora_enabled')) {
2763                         $diaspora = Protocol::DIASPORA;
2764                 } else {
2765                         $diaspora = Protocol::DFRN;
2766                 }
2767
2768                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2769                         $ostatus = Protocol::OSTATUS;
2770                 } else {
2771                         $ostatus = Protocol::DFRN;
2772                 }
2773
2774                 // check if we search only communities or every contact
2775                 if ($mode === 'community') {
2776                         $extra_sql = sprintf(' AND `contact-type` = %d', Contact::TYPE_COMMUNITY);
2777                 } else {
2778                         $extra_sql = '';
2779                 }
2780
2781                 $search .= '%';
2782
2783                 $results = DBA::p("SELECT * FROM `contact`
2784                         WHERE NOT `unsearchable` AND `network` IN (?, ?, ?, ?) AND
2785                                 NOT `failed` AND `uid` = ? AND
2786                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2787                                 ORDER BY `nurl` DESC LIMIT 1000",
2788                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, 0, $search, $search, $search
2789                 );
2790
2791                 $contacts = DBA::toArray($results);
2792                 return $contacts;
2793         }
2794
2795         /**
2796          * Add public contacts from an array
2797          *
2798          * @param array $urls
2799          * @return array result "count", "added" and "updated"
2800          */
2801         public static function addByUrls(array $urls)
2802         {
2803                 $added = 0;
2804                 $updated = 0;
2805                 $count = 0;
2806
2807                 foreach ($urls as $url) {
2808                         $contact = Contact::getByURL($url, false, ['id']);
2809                         if (empty($contact['id'])) {
2810                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
2811                                 ++$added;
2812                         } else {
2813                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
2814                                 ++$updated;
2815                         }
2816                         ++$count;
2817                 }
2818
2819                 return ['count' => $count, 'added' => $added, 'updated' => $updated];
2820         }
2821
2822         /**
2823          * Returns a random, global contact of the current node
2824          *
2825          * @return string The profile URL
2826          * @throws Exception
2827          */
2828         public static function getRandomUrl()
2829         {
2830                 $r = DBA::selectFirst('contact', ['url'], [
2831                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
2832                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
2833                 ], ['order' => ['RAND()']]);
2834
2835                 if (DBA::isResult($r)) {
2836                         return $r['url'];
2837                 }
2838
2839                 return '';
2840         }
2841 }