src/Model/Contact.php

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