src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, 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\Contact\Introduction\Exception\IntroductionNotFoundException;
  26 use Friendica\Content\Pager;
  27 use Friendica\Content\Text\HTML;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Renderer;
  32 use Friendica\Core\Session;
  33 use Friendica\Core\System;
  34 use Friendica\Core\Worker;
  35 use Friendica\Database\Database;
  36 use Friendica\Database\DBA;
  37 use Friendica\DI;
  38 use Friendica\Network\HTTPException;
  39 use Friendica\Network\Probe;
  40 use Friendica\Protocol\Activity;
  41 use Friendica\Protocol\ActivityPub;
  42 use Friendica\Protocol\Diaspora;
  43 use Friendica\Protocol\OStatus;
  44 use Friendica\Protocol\Salmon;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50
  51 /**
  52  * functions for interacting with a contact
  53  */
  54 class Contact
  55 {
  56         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  57         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  58         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  59
  60         /**
  61          * @}
  62          */
  63
  64         const LOCK_INSERT = 'contact-insert';
  65
  66         /**
  67          * Account types
  68          *
  69          * TYPE_UNKNOWN - unknown type
  70          *
  71          * TYPE_PERSON - the account belongs to a person
  72          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  73          *
  74          * TYPE_ORGANISATION - the account belongs to an organisation
  75          *      Associated page type: PAGE_SOAPBOX
  76          *
  77          * TYPE_NEWS - the account is a news reflector
  78          *      Associated page type: PAGE_SOAPBOX
  79          *
  80          * TYPE_COMMUNITY - the account is community forum
  81          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
  82          *
  83          * TYPE_RELAY - the account is a relay
  84          *      This will only be assigned to contacts, not to user accounts
  85          * @{
  86          */
  87         const TYPE_UNKNOWN =     -1;
  88         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
  89         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
  90         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
  91         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
  92         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
  93         /**
  94          * @}
  95          */
  96
  97         /**
  98          * Contact_is
  99          *
 100          * Relationship types
 101          * @{
 102          */
 103         const NOTHING  = 0;
 104         const FOLLOWER = 1;
 105         const SHARING  = 2;
 106         const FRIEND   = 3;
 107         const SELF     = 4;
 108         /**
 109          * @}
 110          */
 111
 112          const MIRROR_DEACTIVATED = 0;
 113          const MIRROR_FORWARDED = 1;
 114          const MIRROR_OWN_POST = 2;
 115          const MIRROR_NATIVE_RESHARE = 3;
 116
 117          /**
 118          * @param array $fields    Array of selected fields, empty for all
 119          * @param array $condition Array of fields for condition
 120          * @param array $params    Array of several parameters
 121          * @return array
 122          * @throws \Exception
 123          */
 124         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 125         {
 126                 return DBA::selectToArray('contact', $fields, $condition, $params);
 127         }
 128
 129         /**
 130          * @param array $fields    Array of selected fields, empty for all
 131          * @param array $condition Array of fields for condition
 132          * @param array $params    Array of several parameters
 133          * @return array
 134          * @throws \Exception
 135          */
 136         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 137         {
 138                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 139
 140                 return $contact;
 141         }
 142
 143         /**
 144          * Insert a row into the contact table
 145          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 146          *
 147          * @param array $fields         field array
 148          * @param int   $duplicate_mode Do an update on a duplicate entry
 149          *
 150          * @return int  id of the created contact
 151          * @throws \Exception
 152          */
 153         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 154         {
 155                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 156                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 157                 }
 158
 159                 $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 160
 161                 if (empty($fields['created'])) {
 162                         $fields['created'] = DateTimeFormat::utcNow();
 163                 }
 164
 165                 DBA::insert('contact', $fields, $duplicate_mode);
 166                 $contact = DBA::selectFirst('contact', [], ['id' => DBA::lastInsertId()]);
 167                 if (!DBA::isResult($contact)) {
 168                         // Shouldn't happen
 169                         Logger::warning('Created contact could not be found', ['fields' => $fields]);
 170                         return 0;
 171                 }
 172
 173                 Contact\User::insertForContactArray($contact);
 174
 175                 // Search for duplicated contacts and get rid of them
 176                 if (!$contact['self']) {
 177                         self::removeDuplicates($contact['nurl'], $contact['uid']);
 178                 }
 179
 180                 return $contact['id'];
 181         }
 182
 183         /**
 184          * Updates rows in the contact table
 185          *
 186          * @param array         $fields     contains the fields that are updated
 187          * @param array         $condition  condition array with the key values
 188          * @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate, false = don't update identical fields)
 189          *
 190          * @return boolean was the update successfull?
 191          * @throws \Exception
 192          */
 193         public static function update(array $fields, array $condition, $old_fields = [])
 194         {
 195                 $ret = DBA::update('contact', $fields, $condition, $old_fields);
 196
 197                 // Apply changes to the "user-contact" table on dedicated fields
 198                 Contact\User::updateByContactUpdate($fields, $condition);
 199
 200                 return $ret;
 201         }
 202
 203         /**
 204          * @param integer $id     Contact ID
 205          * @param array   $fields Array of selected fields, empty for all
 206          * @return array|boolean Contact record if it exists, false otherwise
 207          * @throws \Exception
 208          */
 209         public static function getById($id, $fields = [])
 210         {
 211                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 212         }
 213
 214         /**
 215          * Fetch the first contact with the provided uri-id.
 216          *
 217          * @param integer $uri_id uri-id of the contact
 218          * @param array   $fields Array of selected fields, empty for all
 219          * @return array|boolean Contact record if it exists, false otherwise
 220          * @throws \Exception
 221          */
 222         public static function getByUriId($uri_id, $fields = [])
 223         {
 224                 return DBA::selectFirst('contact', $fields, ['uri-id' => $uri_id], ['order' => ['uid']]);
 225         }
 226
 227         /**
 228          * Fetches a contact by a given url
 229          *
 230          * @param string  $url    profile url
 231          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 232          * @param array   $fields Field list
 233          * @param integer $uid    User ID of the contact
 234          * @return array contact array
 235          */
 236         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 237         {
 238                 if ($update || is_null($update)) {
 239                         $cid = self::getIdForURL($url, $uid, $update);
 240                         if (empty($cid)) {
 241                                 return [];
 242                         }
 243
 244                         $contact = self::getById($cid, $fields);
 245                         if (empty($contact)) {
 246                                 return [];
 247                         }
 248                         return $contact;
 249                 }
 250
 251                 // Add internal fields
 252                 $removal = [];
 253                 if (!empty($fields)) {
 254                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 255                                 if (!in_array($internal, $fields)) {
 256                                         $fields[] = $internal;
 257                                         $removal[] = $internal;
 258                                 }
 259                         }
 260                 }
 261
 262                 // We first try the nurl (http://server.tld/nick), most common case
 263                 $options = ['order' => ['id']];
 264                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 265
 266                 // Then the addr (nick@server.tld)
 267                 if (!DBA::isResult($contact)) {
 268                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 269                 }
 270
 271                 // Then the alias (which could be anything)
 272                 if (!DBA::isResult($contact)) {
 273                         // The link could be provided as http although we stored it as https
 274                         $ssl_url = str_replace('http://', 'https://', $url);
 275                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 276                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 277                 }
 278
 279                 if (!DBA::isResult($contact)) {
 280                         return [];
 281                 }
 282
 283                 // Update the contact in the background if needed
 284                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 285                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 286                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 287                 }
 288
 289                 // Remove the internal fields
 290                 foreach ($removal as $internal) {
 291                         unset($contact[$internal]);
 292                 }
 293
 294                 return $contact;
 295         }
 296
 297         /**
 298          * Fetches a contact for a given user by a given url.
 299          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 300          *
 301          * @param string  $url    profile url
 302          * @param integer $uid    User ID of the contact
 303          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 304          * @param array   $fields Field list
 305          * @return array contact array
 306          */
 307         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 308         {
 309                 if ($uid != 0) {
 310                         $contact = self::getByURL($url, $update, $fields, $uid);
 311                         if (!empty($contact)) {
 312                                 if (!empty($contact['id'])) {
 313                                         $contact['cid'] = $contact['id'];
 314                                         $contact['zid'] = 0;
 315                                 }
 316                                 return $contact;
 317                         }
 318                 }
 319
 320                 $contact = self::getByURL($url, $update, $fields);
 321                 if (!empty($contact['id'])) {
 322                         $contact['cid'] = 0;
 323                         $contact['zid'] = $contact['id'];
 324                 }
 325                 return $contact;
 326         }
 327
 328         /**
 329          * Tests if the given contact is a follower
 330          *
 331          * @param int $cid Either public contact id or user's contact id
 332          * @param int $uid User ID
 333          *
 334          * @return boolean is the contact id a follower?
 335          * @throws HTTPException\InternalServerErrorException
 336          * @throws \ImagickException
 337          */
 338         public static function isFollower($cid, $uid)
 339         {
 340                 if (Contact\User::isBlocked($cid, $uid)) {
 341                         return false;
 342                 }
 343
 344                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 345                 if (empty($cdata['user'])) {
 346                         return false;
 347                 }
 348
 349                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 350                 return DBA::exists('contact', $condition);
 351         }
 352
 353         /**
 354          * Tests if the given contact url is a follower
 355          *
 356          * @param string $url Contact URL
 357          * @param int    $uid User ID
 358          *
 359          * @return boolean is the contact id a follower?
 360          * @throws HTTPException\InternalServerErrorException
 361          * @throws \ImagickException
 362          */
 363         public static function isFollowerByURL($url, $uid)
 364         {
 365                 $cid = self::getIdForURL($url, $uid);
 366
 367                 if (empty($cid)) {
 368                         return false;
 369                 }
 370
 371                 return self::isFollower($cid, $uid);
 372         }
 373
 374         /**
 375          * Tests if the given user follow the given contact
 376          *
 377          * @param int $cid Either public contact id or user's contact id
 378          * @param int $uid User ID
 379          *
 380          * @return boolean is the contact url being followed?
 381          * @throws HTTPException\InternalServerErrorException
 382          * @throws \ImagickException
 383          */
 384         public static function isSharing($cid, $uid)
 385         {
 386                 if (Contact\User::isBlocked($cid, $uid)) {
 387                         return false;
 388                 }
 389
 390                 $cdata = self::getPublicAndUserContactID($cid, $uid);
 391                 if (empty($cdata['user'])) {
 392                         return false;
 393                 }
 394
 395                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 396                 return DBA::exists('contact', $condition);
 397         }
 398
 399         /**
 400          * Tests if the given user follow the given contact url
 401          *
 402          * @param string $url Contact URL
 403          * @param int    $uid User ID
 404          *
 405          * @return boolean is the contact url being followed?
 406          * @throws HTTPException\InternalServerErrorException
 407          * @throws \ImagickException
 408          */
 409         public static function isSharingByURL($url, $uid)
 410         {
 411                 $cid = self::getIdForURL($url, $uid);
 412
 413                 if (empty($cid)) {
 414                         return false;
 415                 }
 416
 417                 return self::isSharing($cid, $uid);
 418         }
 419
 420         /**
 421          * Get the basepath for a given contact link
 422          *
 423          * @param string $url The contact link
 424          * @param boolean $dont_update Don't update the contact
 425          *
 426          * @return string basepath
 427          * @throws HTTPException\InternalServerErrorException
 428          * @throws \ImagickException
 429          */
 430         public static function getBasepath($url, $dont_update = false)
 431         {
 432                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 433                 if (!DBA::isResult($contact)) {
 434                         return '';
 435                 }
 436
 437                 if (!empty($contact['baseurl'])) {
 438                         return $contact['baseurl'];
 439                 } elseif ($dont_update) {
 440                         return '';
 441                 }
 442
 443                 // Update the existing contact
 444                 self::updateFromProbe($contact['id']);
 445
 446                 // And fetch the result
 447                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 448                 if (empty($contact['baseurl'])) {
 449                         Logger::info('No baseurl for contact', ['url' => $url]);
 450                         return '';
 451                 }
 452
 453                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 454                 return $contact['baseurl'];
 455         }
 456
 457         /**
 458          * Check if the given contact url is on the same server
 459          *
 460          * @param string $url The contact link
 461          *
 462          * @return boolean Is it the same server?
 463          */
 464         public static function isLocal($url)
 465         {
 466                 if (!parse_url($url, PHP_URL_SCHEME)) {
 467                         $addr_parts = explode('@', $url);
 468                         return (count($addr_parts) == 2) && ($addr_parts[1] == DI::baseUrl()->getHostname());
 469                 }
 470
 471                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 472         }
 473
 474         /**
 475          * Check if the given contact ID is on the same server
 476          *
 477          * @param string $url The contact link
 478          *
 479          * @return boolean Is it the same server?
 480          */
 481         public static function isLocalById(int $cid)
 482         {
 483                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 484                 if (!DBA::isResult($contact)) {
 485                         return false;
 486                 }
 487
 488                 if (empty($contact['baseurl'])) {
 489                         $baseurl = self::getBasepath($contact['url'], true);
 490                 } else {
 491                         $baseurl = $contact['baseurl'];
 492                 }
 493
 494                 return Strings::compareLink($baseurl, DI::baseUrl());
 495         }
 496
 497         /**
 498          * Returns the public contact id of the given user id
 499          *
 500          * @param  integer $uid User ID
 501          *
 502          * @return integer|boolean Public contact id for given user id
 503          * @throws \Exception
 504          */
 505         public static function getPublicIdByUserId($uid)
 506         {
 507                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 508                 if (!DBA::isResult($self)) {
 509                         return false;
 510                 }
 511                 return self::getIdForURL($self['url']);
 512         }
 513
 514         /**
 515          * Returns the contact id for the user and the public contact id for a given contact id
 516          *
 517          * @param int $cid Either public contact id or user's contact id
 518          * @param int $uid User ID
 519          *
 520          * @return array with public and user's contact id
 521          * @throws HTTPException\InternalServerErrorException
 522          * @throws \ImagickException
 523          */
 524         public static function getPublicAndUserContactID($cid, $uid)
 525         {
 526                 // We have to use the legacy function as long as the post update hasn't finished
 527                 if (DI::config()->get('system', 'post_update_version') < 1427) {
 528                         return self::legacyGetPublicAndUserContactID($cid, $uid);
 529                 }
 530
 531                 if (empty($uid) || empty($cid)) {
 532                         return [];
 533                 }
 534
 535                 $contact = DBA::selectFirst('account-user-view', ['id', 'uid', 'pid'], ['id' => $cid]);
 536                 if (!DBA::isResult($contact) || !in_array($contact['uid'], [0, $uid])) {
 537                         return [];
 538                 }
 539
 540                 $pcid = $contact['pid'];
 541                 if ($contact['uid'] == $uid) {
 542                         $ucid = $contact['id'];
 543                 } else {
 544                         $contact = DBA::selectFirst('account-user-view', ['id', 'uid'], ['pid' => $cid, 'uid' => $uid]);
 545                         if (DBA::isResult($contact)) {
 546                                 $ucid = $contact['id'];
 547                         } else {
 548                                 $ucid = 0;
 549                         }
 550                 }
 551
 552                 return ['public' => $pcid, 'user' => $ucid];
 553         }
 554
 555         /**
 556          * Helper function for "getPublicAndUserContactID"
 557          *
 558          * @param int $cid Either public contact id or user's contact id
 559          * @param int $uid User ID
 560          *
 561          * @return array with public and user's contact id
 562          * @throws HTTPException\InternalServerErrorException
 563          * @throws \ImagickException
 564          */
 565         private static function legacyGetPublicAndUserContactID($cid, $uid)
 566         {
 567                 if (empty($uid) || empty($cid)) {
 568                         return [];
 569                 }
 570
 571                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 572                 if (!DBA::isResult($contact)) {
 573                         return [];
 574                 }
 575
 576                 // We quit when the user id don't match the user id of the provided contact
 577                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 578                         return [];
 579                 }
 580
 581                 if ($contact['uid'] != 0) {
 582                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 583                         if (empty($pcid)) {
 584                                 return [];
 585                         }
 586                         $ucid = $contact['id'];
 587                 } else {
 588                         $pcid = $contact['id'];
 589                         $ucid = self::getIdForURL($contact['url'], $uid);
 590                 }
 591
 592                 return ['public' => $pcid, 'user' => $ucid];
 593         }
 594
 595         /**
 596          * Returns contact details for a given contact id in combination with a user id
 597          *
 598          * @param int $cid A contact ID
 599          * @param int $uid The User ID
 600          * @param array $fields The selected fields for the contact
 601          *
 602          * @return array The contact details
 603          *
 604          * @throws \Exception
 605          */
 606         public static function getContactForUser($cid, $uid, array $fields = [])
 607         {
 608                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 609
 610                 if (!DBA::isResult($contact)) {
 611                         return [];
 612                 } else {
 613                         return $contact;
 614                 }
 615         }
 616
 617         /**
 618          * Creates the self-contact for the provided user id
 619          *
 620          * @param int $uid
 621          * @return bool Operation success
 622          * @throws HTTPException\InternalServerErrorException
 623          */
 624         public static function createSelfFromUserId($uid)
 625         {
 626                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 627                         ['uid' => $uid, 'account_expired' => false]);
 628                 if (!DBA::isResult($user)) {
 629                         return false;
 630                 }
 631
 632                 $contact = [
 633                         'uid'         => $user['uid'],
 634                         'created'     => DateTimeFormat::utcNow(),
 635                         'self'        => 1,
 636                         'name'        => $user['username'],
 637                         'nick'        => $user['nickname'],
 638                         'pubkey'      => $user['pubkey'],
 639                         'prvkey'      => $user['prvkey'],
 640                         'photo'       => User::getAvatarUrl($user),
 641                         'thumb'       => User::getAvatarUrl($user, Proxy::SIZE_THUMB),
 642                         'micro'       => User::getAvatarUrl($user, Proxy::SIZE_MICRO),
 643                         'blocked'     => 0,
 644                         'pending'     => 0,
 645                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 646                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 647                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 648                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 649                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 650                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 651                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 652                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 653                         'name-date'   => DateTimeFormat::utcNow(),
 654                         'uri-date'    => DateTimeFormat::utcNow(),
 655                         'avatar-date' => DateTimeFormat::utcNow(),
 656                         'closeness'   => 0
 657                 ];
 658
 659                 $return = true;
 660
 661                 // Only create the entry if it doesn't exist yet
 662                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 663                         $return = (bool)self::insert($contact);
 664                 }
 665
 666                 // Create the public contact
 667                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 668                         $contact['self']   = false;
 669                         $contact['uid']    = 0;
 670                         $contact['prvkey'] = null;
 671
 672                         self::insert($contact, Database::INSERT_IGNORE);
 673                 }
 674
 675                 return $return;
 676         }
 677
 678         /**
 679          * Updates the self-contact for the provided user id
 680          *
 681          * @param int     $uid
 682          * @param boolean $update_avatar Force the avatar update
 683          * @return bool   "true" if updated
 684          * @throws HTTPException\InternalServerErrorException
 685          */
 686         public static function updateSelfFromUserID($uid, $update_avatar = false)
 687         {
 688                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey', 'manually-approve',
 689                         'xmpp', 'matrix', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 690                         'photo', 'thumb', 'micro', 'header', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 691                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 692                 if (!DBA::isResult($self)) {
 693                         return false;
 694                 }
 695
 696                 $fields = ['uid', 'nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 697                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 698                 if (!DBA::isResult($user)) {
 699                         return false;
 700                 }
 701
 702                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 703                         'country-name', 'pub_keywords', 'xmpp', 'matrix', 'net-publish'];
 704                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 705                 if (!DBA::isResult($profile)) {
 706                         return false;
 707                 }
 708
 709                 $file_suffix = 'jpg';
 710
 711                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 712                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 713                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 714                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 715                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'matrix' => $profile['matrix'], 'network' => Protocol::DFRN];
 716
 717                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 718                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 719                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 720                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 721                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 722                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 723                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 724                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 725                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 726
 727                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 728                 if (DBA::isResult($avatar)) {
 729                         if ($update_avatar) {
 730                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 731                         }
 732
 733                         // Creating the path to the avatar, beginning with the file suffix
 734                         $types = Images::supportedTypes();
 735                         if (isset($types[$avatar['type']])) {
 736                                 $file_suffix = $types[$avatar['type']];
 737                         }
 738
 739                         // We are adding a timestamp value so that other systems won't use cached content
 740                         $timestamp = strtotime($fields['avatar-date']);
 741
 742                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 743                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 744
 745                         $fields['photo'] = $prefix . '4' . $suffix;
 746                         $fields['thumb'] = $prefix . '5' . $suffix;
 747                         $fields['micro'] = $prefix . '6' . $suffix;
 748                 } else {
 749                         // We hadn't found a photo entry, so we use the default avatar
 750                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 751                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 752                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 753                 }
 754
 755                 $fields['avatar'] = User::getAvatarUrl($user);
 756                 $fields['header'] = User::getBannerUrl($user);
 757                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 758                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 759                 $fields['unsearchable'] = !$profile['net-publish'];
 760                 $fields['manually-approve'] = in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_PRVGROUP]);
 761
 762                 $update = false;
 763
 764                 foreach ($fields as $field => $content) {
 765                         if ($self[$field] != $content) {
 766                                 $update = true;
 767                         }
 768                 }
 769
 770                 if ($update) {
 771                         if ($fields['name'] != $self['name']) {
 772                                 $fields['name-date'] = DateTimeFormat::utcNow();
 773                         }
 774                         $fields['updated'] = DateTimeFormat::utcNow();
 775                         self::update($fields, ['id' => $self['id']]);
 776
 777                         // Update the public contact as well
 778                         $fields['prvkey'] = null;
 779                         $fields['self']   = false;
 780                         self::update($fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 781
 782                         // Update the profile
 783                         $fields = [
 784                                 'photo' => User::getAvatarUrl($user),
 785                                 'thumb' => User::getAvatarUrl($user, Proxy::SIZE_THUMB)
 786                         ];
 787
 788                         DBA::update('profile', $fields, ['uid' => $uid]);
 789                 }
 790
 791                 return $update;
 792         }
 793
 794         /**
 795          * Marks a contact for removal
 796          *
 797          * @param int $id contact id
 798          * @throws HTTPException\InternalServerErrorException
 799          */
 800         public static function remove($id)
 801         {
 802                 // We want just to make sure that we don't delete our "self" contact
 803                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 804                 if (!DBA::isResult($contact)) {
 805                         return;
 806                 }
 807
 808                 // Archive the contact
 809                 self::update(['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 810
 811                 // Delete it in the background
 812                 Worker::add(PRIORITY_MEDIUM, 'Contact\Remove', $id);
 813         }
 814
 815         /**
 816          * Unfollow the remote contact
 817          *
 818          * @param array $contact Target user-specific contact (uid != 0) array
 819          * @throws HTTPException\InternalServerErrorException
 820          * @throws \ImagickException
 821          */
 822         public static function unfollow(array $contact): void
 823         {
 824                 if (empty($contact['network'])) {
 825                         throw new \InvalidArgumentException('Empty network in contact array');
 826                 }
 827
 828                 if (empty($contact['uid'])) {
 829                         throw new \InvalidArgumentException('Unexpected public contact record');
 830                 }
 831
 832                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 833                         $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 834                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 835                 }
 836
 837                 self::removeSharer($contact);
 838         }
 839
 840         /**
 841          * Revoke follow privileges of the remote user contact
 842          *
 843          * The local relationship is updated immediately, the eventual remote server is messaged in the background.
 844          *
 845          * @param array $contact User-specific contact array (uid != 0) to revoke the follow from
 846          * @throws HTTPException\InternalServerErrorException
 847          * @throws \ImagickException
 848          */
 849         public static function revokeFollow(array $contact): void
 850         {
 851                 if (empty($contact['network'])) {
 852                         throw new \InvalidArgumentException('Empty network in contact array');
 853                 }
 854
 855                 if (empty($contact['uid'])) {
 856                         throw new \InvalidArgumentException('Unexpected public contact record');
 857                 }
 858
 859                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 860                         $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 861                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 862                 }
 863
 864                 self::removeFollower($contact);
 865         }
 866
 867         /**
 868          * Completely severs a relationship with a contact
 869          *
 870          * @param array $contact User-specific contact (uid != 0) array
 871          * @throws HTTPException\InternalServerErrorException
 872          * @throws \ImagickException
 873          */
 874         public static function terminateFriendship(array $contact)
 875         {
 876                 if (empty($contact['network'])) {
 877                         throw new \InvalidArgumentException('Empty network in contact array');
 878                 }
 879
 880                 if (empty($contact['uid'])) {
 881                         throw new \InvalidArgumentException('Unexpected public contact record');
 882                 }
 883
 884                 $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 885
 886                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 887                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 888                 }
 889
 890                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 891                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 892                 }
 893
 894                 self::remove($contact['id']);
 895         }
 896
 897
 898         /**
 899          * Marks a contact for archival after a communication issue delay
 900          *
 901          * Contact has refused to recognise us as a friend. We will start a countdown.
 902          * If they still don't recognise us in 32 days, the relationship is over,
 903          * and we won't waste any more time trying to communicate with them.
 904          * This provides for the possibility that their database is temporarily messed
 905          * up or some other transient event and that there's a possibility we could recover from it.
 906          *
 907          * @param array $contact contact to mark for archival
 908          * @return null
 909          * @throws HTTPException\InternalServerErrorException
 910          */
 911         public static function markForArchival(array $contact)
 912         {
 913                 if (!isset($contact['url']) && !empty($contact['id'])) {
 914                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 915                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 916                         if (!DBA::isResult($contact)) {
 917                                 return;
 918                         }
 919                 } elseif (!isset($contact['url'])) {
 920                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 921                 }
 922
 923                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 924
 925                 // Contact already archived or "self" contact? => nothing to do
 926                 if ($contact['archive'] || $contact['self']) {
 927                         return;
 928                 }
 929
 930                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 931                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 932                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 933                 } else {
 934                         /* @todo
 935                          * We really should send a notification to the owner after 2-3 weeks
 936                          * so they won't be surprised when the contact vanishes and can take
 937                          * remedial action if this was a serious mistake or glitch
 938                          */
 939
 940                         /// @todo Check for contact vitality via probing
 941                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 942
 943                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 944                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 945                                 /* Relationship is really truly dead. archive them rather than
 946                                  * delete, though if the owner tries to unarchive them we'll start
 947                                  * the whole process over again.
 948                                  */
 949                                 self::update(['archive' => true], ['id' => $contact['id']]);
 950                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 951                         }
 952                 }
 953         }
 954
 955         /**
 956          * Cancels the archival countdown
 957          *
 958          * @see   Contact::markForArchival()
 959          *
 960          * @param array $contact contact to be unmarked for archival
 961          * @return null
 962          * @throws \Exception
 963          */
 964         public static function unmarkForArchival(array $contact)
 965         {
 966                 // Always unarchive the relay contact entry
 967                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 968                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 969                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 970                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 971                                 self::update($fields, $condition);
 972                         }
 973                 }
 974
 975                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 976                 $exists = DBA::exists('contact', $condition);
 977
 978                 // We don't need to update, we never marked this contact for archival
 979                 if (!$exists) {
 980                         return;
 981                 }
 982
 983                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 984
 985                 if (!isset($contact['url']) && !empty($contact['id'])) {
 986                         $fields = ['id', 'url', 'batch'];
 987                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 988                         if (!DBA::isResult($contact)) {
 989                                 return;
 990                         }
 991                 }
 992
 993                 // It's a miracle. Our dead contact has inexplicably come back to life.
 994                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 995                 self::update($fields, ['id' => $contact['id']]);
 996                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 997         }
 998
 999         /**
1000          * Returns the data array for the photo menu of a given contact
1001          *
1002          * @param array $contact contact
1003          * @param int   $uid     optional, default 0
1004          * @return array
1005          * @throws HTTPException\InternalServerErrorException
1006          * @throws \ImagickException
1007          */
1008         public static function photoMenu(array $contact, $uid = 0)
1009         {
1010                 $pm_url = '';
1011                 $status_link = '';
1012                 $photos_link = '';
1013                 $poke_link = '';
1014
1015                 if ($uid == 0) {
1016                         $uid = local_user();
1017                 }
1018
1019                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1020                         if ($uid == 0) {
1021                                 $profile_link = self::magicLinkByContact($contact);
1022                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1023
1024                                 return $menu;
1025                         }
1026
1027                         // Look for our own contact if the uid doesn't match and isn't public
1028                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1029                         if (DBA::isResult($contact_own)) {
1030                                 return self::photoMenu($contact_own, $uid);
1031                         }
1032                 }
1033
1034                 $sparkle = false;
1035                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1036                         $sparkle = true;
1037                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1038                 } else {
1039                         $profile_link = $contact['url'];
1040                 }
1041
1042                 if ($profile_link === 'mailbox') {
1043                         $profile_link = '';
1044                 }
1045
1046                 if ($sparkle) {
1047                         $status_link = $profile_link . '/status';
1048                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1049                         $profile_link = $profile_link . '/profile';
1050                 }
1051
1052                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1053                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1054                 }
1055
1056                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1057                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1058                 }
1059
1060                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1061
1062                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1063
1064                 $follow_link = '';
1065                 $unfollow_link = '';
1066                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1067                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1068                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1069                         } elseif(!$contact['pending']) {
1070                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1071                         }
1072                 }
1073
1074                 /**
1075                  * Menu array:
1076                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1077                  */
1078                 if (empty($contact['uid'])) {
1079                         $menu = [
1080                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1081                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1082                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1083                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1084                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1085                         ];
1086                 } else {
1087                         $menu = [
1088                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1089                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1090                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1091                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1092                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1093                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1094                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1095                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1096                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1097                         ];
1098
1099                         if (!empty($contact['pending'])) {
1100                                 try {
1101                                         $intro = DI::intro()->selectForContact($contact['id']);
1102                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1103                                 } catch (IntroductionNotFoundException $exception) {
1104                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1105                                 }
1106                         }
1107                 }
1108
1109                 $args = ['contact' => $contact, 'menu' => &$menu];
1110
1111                 Hook::callAll('contact_photo_menu', $args);
1112
1113                 $menucondensed = [];
1114
1115                 foreach ($menu as $menuname => $menuitem) {
1116                         if ($menuitem[1] != '') {
1117                                 $menucondensed[$menuname] = $menuitem;
1118                         }
1119                 }
1120
1121                 return $menucondensed;
1122         }
1123
1124         /**
1125          * Fetch the contact id for a given URL and user
1126          *
1127          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1128          * `addr` or `alias`.
1129          *
1130          * If there's no record and we aren't looking for a public contact, we quit.
1131          * If there's one, we check that it isn't time to update the picture else we
1132          * directly return the found contact id.
1133          *
1134          * Second, we probe the provided $url whether it's http://server.tld/profile or
1135          * nick@server.tld. We quit if we can't get any info back.
1136          *
1137          * Third, we create the contact record if it doesn't exist
1138          *
1139          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1140          * if there's any updates
1141          *
1142          * @param string  $url       Contact URL
1143          * @param integer $uid       The user id for the contact (0 = public contact)
1144          * @param boolean $update    true = always update, false = never update, null = update when not found
1145          * @param array   $default   Default value for creating the contact when everything else fails
1146          *
1147          * @return integer Contact ID
1148          * @throws HTTPException\InternalServerErrorException
1149          * @throws \ImagickException
1150          */
1151         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1152         {
1153                 $contact_id = 0;
1154
1155                 if ($url == '') {
1156                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1157                         return 0;
1158                 }
1159
1160                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1161
1162                 if (!empty($contact)) {
1163                         $contact_id = $contact["id"];
1164
1165                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1166                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1167                                 return $contact_id;
1168                         }
1169                 } elseif ($uid != 0) {
1170                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1171                         return 0;
1172                 } elseif (empty($default) && !is_null($update) && !$update) {
1173                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1174                         return 0;
1175                 }
1176
1177                 $data = [];
1178
1179                 if (empty($default['network']) || $update) {
1180                         $data = Probe::uri($url, "", $uid);
1181
1182                         // Take the default values when probing failed
1183                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1184                                 $data = array_merge($data, $default);
1185                         }
1186                 } elseif (!empty($default['network'])) {
1187                         $data = $default;
1188                 }
1189
1190                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1191                         // Fetch data for the public contact via the first found personal contact
1192                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1193                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1194                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1195                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1196
1197                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1198                         if (!DBA::isResult($personal_contact)) {
1199                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1200                         }
1201
1202                         if (DBA::isResult($personal_contact)) {
1203                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1204                                 $data = $personal_contact;
1205                                 $data['photo'] = $personal_contact['avatar'];
1206                                 $data['account-type'] = $personal_contact['contact-type'];
1207                                 $data['hide'] = $personal_contact['unsearchable'];
1208                                 unset($data['avatar']);
1209                                 unset($data['contact-type']);
1210                                 unset($data['unsearchable']);
1211                         }
1212                 }
1213
1214                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1215                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1216                         return 0;
1217                 }
1218
1219                 if (!$contact_id) {
1220                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1221                         if (!empty($data['alias'])) {
1222                                 $urls[] = Strings::normaliseLink($data['alias']);
1223                         }
1224                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1225                         if (!empty($contact['id'])) {
1226                                 $contact_id = $contact['id'];
1227                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1228                         }
1229                 }
1230
1231                 if (!$contact_id) {
1232                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1233                         $fields = [
1234                                 'uid'       => $uid,
1235                                 'url'       => $data['url'],
1236                                 'nurl'      => Strings::normaliseLink($data['url']),
1237                                 'network'   => $data['network'],
1238                                 'created'   => DateTimeFormat::utcNow(),
1239                                 'rel'       => self::SHARING,
1240                                 'writable'  => 1,
1241                                 'blocked'   => 0,
1242                                 'readonly'  => 0,
1243                                 'pending'   => 0];
1244
1245                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1246
1247                         // Before inserting we do check if the entry does exist now.
1248                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1249                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1250                                 if (DBA::isResult($contact)) {
1251                                         $contact_id = $contact['id'];
1252                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1253                                 } else {
1254                                         $contact_id = self::insert($fields);
1255                                         if ($contact_id) {
1256                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1257                                         }
1258                                 }
1259                                 DI::lock()->release(self::LOCK_INSERT);
1260                         } else {
1261                                 Logger::warning('Contact lock had not been acquired');
1262                         }
1263
1264                         if (!$contact_id) {
1265                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1266                                 return 0;
1267                         }
1268                 } else {
1269                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1270                 }
1271
1272                 if ($data['network'] == Protocol::DIASPORA) {
1273                         FContact::updateFromProbeArray($data);
1274                 }
1275
1276                 self::updateFromProbeArray($contact_id, $data);
1277
1278                 // Don't return a number for a deleted account
1279                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1280                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1281                         return 0;
1282                 }
1283
1284                 return $contact_id;
1285         }
1286
1287         /**
1288          * Checks if the contact is archived
1289          *
1290          * @param int $cid contact id
1291          *
1292          * @return boolean Is the contact archived?
1293          * @throws HTTPException\InternalServerErrorException
1294          */
1295         public static function isArchived(int $cid)
1296         {
1297                 if ($cid == 0) {
1298                         return false;
1299                 }
1300
1301                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1302                 if (!DBA::isResult($contact)) {
1303                         return false;
1304                 }
1305
1306                 if ($contact['archive']) {
1307                         return true;
1308                 }
1309
1310                 // Check status of ActivityPub endpoints
1311                 $apcontact = APContact::getByURL($contact['url'], false);
1312                 if (!empty($apcontact)) {
1313                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1314                                 return true;
1315                         }
1316
1317                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1318                                 return true;
1319                         }
1320                 }
1321
1322                 // Check status of Diaspora endpoints
1323                 if (!empty($contact['batch'])) {
1324                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1325                         return DBA::exists('contact', $condition);
1326                 }
1327
1328                 return false;
1329         }
1330
1331         /**
1332          * Checks if the contact is blocked
1333          *
1334          * @param int $cid contact id
1335          *
1336          * @return boolean Is the contact blocked?
1337          * @throws HTTPException\InternalServerErrorException
1338          */
1339         public static function isBlocked($cid)
1340         {
1341                 if ($cid == 0) {
1342                         return false;
1343                 }
1344
1345                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1346                 if (!DBA::isResult($blocked)) {
1347                         return false;
1348                 }
1349
1350                 if (Network::isUrlBlocked($blocked['url'])) {
1351                         return true;
1352                 }
1353
1354                 return (bool) $blocked['blocked'];
1355         }
1356
1357         /**
1358          * Checks if the contact is hidden
1359          *
1360          * @param int $cid contact id
1361          *
1362          * @return boolean Is the contact hidden?
1363          * @throws \Exception
1364          */
1365         public static function isHidden($cid)
1366         {
1367                 if ($cid == 0) {
1368                         return false;
1369                 }
1370
1371                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1372                 if (!DBA::isResult($hidden)) {
1373                         return false;
1374                 }
1375                 return (bool) $hidden['hidden'];
1376         }
1377
1378         /**
1379          * Returns posts from a given contact url
1380          *
1381          * @param string $contact_url Contact URL
1382          * @param bool   $thread_mode
1383          * @param int    $update      Update mode
1384          * @param int    $parent      Item parent ID for the update mode
1385          * @param bool   $only_media  Only display media content
1386          * @return string posts in HTML
1387          * @throws \Exception
1388          */
1389         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1390         {
1391                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1392         }
1393
1394         /**
1395          * Returns posts from a given contact id
1396          *
1397          * @param int  $cid         Contact ID
1398          * @param bool $thread_mode
1399          * @param int  $update      Update mode
1400          * @param int  $parent      Item parent ID for the update mode
1401          * @param bool $only_media  Only display media content
1402          * @return string posts in HTML
1403          * @throws \Exception
1404          */
1405         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1406         {
1407                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1408                 if (!DBA::isResult($contact)) {
1409                         return '';
1410                 }
1411
1412                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1413                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1414                 } else {
1415                         $sql = "`uid` = ?";
1416                 }
1417
1418                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1419
1420                 if ($thread_mode) {
1421                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1422                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1423                 } else {
1424                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1425                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1426                 }
1427
1428                 if (!empty($parent)) {
1429                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1430                 } else {
1431                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1432                         if (!empty($last_received)) {
1433                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1434                         }
1435                 }
1436
1437                 if ($only_media) {
1438                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1439                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1440                 }
1441
1442                 if (DI::mode()->isMobile()) {
1443                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1444                                 DI::config()->get('system', 'itemspage_network_mobile'));
1445                 } else {
1446                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1447                                 DI::config()->get('system', 'itemspage_network'));
1448                 }
1449
1450                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1451
1452                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1453
1454                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1455                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1456                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1457                 } else {
1458                         $o = '';
1459                 }
1460
1461                 if ($thread_mode) {
1462                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1463
1464                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'commented', local_user());
1465                 } else {
1466                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1467
1468                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1469                 }
1470
1471                 if (!$update) {
1472                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1473                                 $o .= HTML::scrollLoader();
1474                         } else {
1475                                 $o .= $pager->renderMinimal(count($items));
1476                         }
1477                 }
1478
1479                 return $o;
1480         }
1481
1482         /**
1483          * Returns the account type name
1484          *
1485          * The function can be called with either the user or the contact array
1486          *
1487          * @param int $type type of contact or account
1488          * @return string
1489          */
1490         public static function getAccountType(int $type)
1491         {
1492                 switch ($type) {
1493                         case self::TYPE_ORGANISATION:
1494                                 $account_type = DI::l10n()->t("Organisation");
1495                                 break;
1496
1497                         case self::TYPE_NEWS:
1498                                 $account_type = DI::l10n()->t('News');
1499                                 break;
1500
1501                         case self::TYPE_COMMUNITY:
1502                                 $account_type = DI::l10n()->t("Forum");
1503                                 break;
1504
1505                         default:
1506                                 $account_type = "";
1507                                 break;
1508                 }
1509
1510                 return $account_type;
1511         }
1512
1513         /**
1514          * Blocks a contact
1515          *
1516          * @param int $cid
1517          * @return bool
1518          * @throws \Exception
1519          */
1520         public static function block($cid, $reason = null)
1521         {
1522                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1523
1524                 return $return;
1525         }
1526
1527         /**
1528          * Unblocks a contact
1529          *
1530          * @param int $cid
1531          * @return bool
1532          * @throws \Exception
1533          */
1534         public static function unblock($cid)
1535         {
1536                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1537
1538                 return $return;
1539         }
1540
1541         /**
1542          * Ensure that cached avatar exist
1543          *
1544          * @param integer $cid
1545          */
1546         public static function checkAvatarCache(int $cid)
1547         {
1548                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1549                 if (!DBA::isResult($contact)) {
1550                         return;
1551                 }
1552
1553                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1554                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1555                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1556                                 self::updateAvatar($cid, $contact['avatar'], true);
1557                                 return;
1558                         }
1559                 } elseif (!empty($contact['photo']) || !empty($contact['thumb']) || !empty($contact['micro'])) {
1560                         Logger::info('Removing avatar cache', ['id' => $cid, 'contact' => $contact]);
1561                         self::updateAvatar($cid, $contact['avatar'], true);
1562                         return;
1563                 }
1564         }
1565
1566         /**
1567          * Return the photo path for a given contact array in the given size
1568          *
1569          * @param array $contact    contact array
1570          * @param string $field     Fieldname of the photo in the contact array
1571          * @param string $size      Size of the avatar picture
1572          * @param string $avatar    Avatar path that is displayed when no photo had been found
1573          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1574          * @return string photo path
1575          */
1576         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1577         {
1578                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1579                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1580         }
1581
1582         /**
1583          * Return the photo path for a given contact array
1584          *
1585          * @param array  $contact   Contact array
1586          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1587          * @return string photo path
1588          */
1589         public static function getPhoto(array $contact, bool $no_update = false)
1590         {
1591                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1592         }
1593
1594         /**
1595          * Return the photo path (thumb size) for a given contact array
1596          *
1597          * @param array  $contact   Contact array
1598          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1599          * @return string photo path
1600          */
1601         public static function getThumb(array $contact, bool $no_update = false)
1602         {
1603                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1604         }
1605
1606         /**
1607          * Return the photo path (micro size) for a given contact array
1608          *
1609          * @param array  $contact   Contact array
1610          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1611          * @return string photo path
1612          */
1613         public static function getMicro(array $contact, bool $no_update = false)
1614         {
1615                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1616         }
1617
1618         /**
1619          * Check the given contact array for avatar cache fields
1620          *
1621          * @param array $contact
1622          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1623          * @return array contact array with avatar cache fields
1624          */
1625         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1626         {
1627                 $update = false;
1628                 $contact_fields = [];
1629                 $fields = ['photo', 'thumb', 'micro'];
1630                 foreach ($fields as $field) {
1631                         if (isset($contact[$field])) {
1632                                 $contact_fields[] = $field;
1633                         }
1634                         if (isset($contact[$field]) && empty($contact[$field])) {
1635                                 $update = true;
1636                         }
1637                 }
1638
1639                 if (!$update || $no_update) {
1640                         return $contact;
1641                 }
1642
1643                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1644                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1645
1646                         $new_contact = self::getById($contact['id'], $contact_fields);
1647                         if (DBA::isResult($new_contact)) {
1648                                 // We only update the cache fields
1649                                 $contact = array_merge($contact, $new_contact);
1650                         }
1651                 }
1652
1653                 /// add the default avatars if the fields aren't filled
1654                 if (isset($contact['photo']) && empty($contact['photo'])) {
1655                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1656                 }
1657                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1658                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1659                 }
1660                 if (isset($contact['micro']) && empty($contact['micro'])) {
1661                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1662                 }
1663
1664                 return $contact;
1665         }
1666
1667         /**
1668          * Fetch the default header for the given contact
1669          *
1670          * @param array $contact  contact array
1671          * @return string avatar URL
1672          */
1673         public static function getDefaultHeader(array $contact): string
1674         {
1675                 if (!empty($contact['header'])) {
1676                         return $contact['header'];
1677                 }
1678
1679                 if (!empty($contact['gsid'])) {
1680                         // Use default banners for certain platforms
1681                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1682                         $platform = strtolower($gserver['platform'] ?? '');
1683                 } else {
1684                         $platform = '';
1685                 }
1686
1687                 switch ($platform) {
1688                         case 'friendica':
1689                         case 'friendika':
1690                                 /**
1691                                  * Picture credits
1692                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1693                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1694                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1695                                  */
1696                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1697                                 break;
1698                         case 'diaspora':
1699                                 /**
1700                                  * Picture credits
1701                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1702                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1703                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1704                                  */
1705                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1706                                 break;
1707                         default:
1708                                 /**
1709                                  * Use a random picture.
1710                                  * The service provides random pictures from Unsplash.
1711                                  * @license https://unsplash.com/license
1712                                  */
1713                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1714                                 break;
1715                 }
1716
1717                 return $header;
1718         }
1719
1720         /**
1721          * Fetch the default avatar for the given contact and size
1722          *
1723          * @param array $contact  contact array
1724          * @param string $size    Size of the avatar picture
1725          * @return string avatar URL
1726          */
1727         public static function getDefaultAvatar(array $contact, string $size)
1728         {
1729                 switch ($size) {
1730                         case Proxy::SIZE_MICRO:
1731                                 $avatar['size'] = 48;
1732                                 $default = self::DEFAULT_AVATAR_MICRO;
1733                                 break;
1734
1735                         case Proxy::SIZE_THUMB:
1736                                 $avatar['size'] = 80;
1737                                 $default = self::DEFAULT_AVATAR_THUMB;
1738                                 break;
1739
1740                         case Proxy::SIZE_SMALL:
1741                         default:
1742                                 $avatar['size'] = 300;
1743                                 $default = self::DEFAULT_AVATAR_PHOTO;
1744                                 break;
1745                 }
1746
1747                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1748                         return DI::baseUrl() . $default;
1749                 }
1750
1751                 if (!empty($contact['xmpp'])) {
1752                         $avatar['email'] = $contact['xmpp'];
1753                 } elseif (!empty($contact['addr'])) {
1754                         $avatar['email'] = $contact['addr'];
1755                 } elseif (!empty($contact['url'])) {
1756                         $avatar['email'] = $contact['url'];
1757                 } else {
1758                         return DI::baseUrl() . $default;
1759                 }
1760
1761                 $avatar['url'] = '';
1762                 $avatar['success'] = false;
1763
1764                 Hook::callAll('avatar_lookup', $avatar);
1765
1766                 if ($avatar['success'] && !empty($avatar['url'])) {
1767                         return $avatar['url'];
1768                 }
1769
1770                 return DI::baseUrl() . $default;
1771         }
1772
1773         /**
1774          * Get avatar link for given contact id
1775          *
1776          * @param integer $cid     contact id
1777          * @param string  $size    One of the Proxy::SIZE_* constants
1778          * @param string  $updated Contact update date
1779          * @return string avatar link
1780          */
1781         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1782         {
1783                 // We have to fetch the "updated" variable when it wasn't provided
1784                 // The parameter can be provided to improve performance
1785                 if (empty($updated) || empty($guid)) {
1786                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1787                         $updated = $account['updated'] ?? '';
1788                         $guid = $account['guid'] ?? '';
1789                 }
1790
1791                 $guid = urlencode($guid);
1792
1793                 $url = DI::baseUrl() . '/photo/contact/';
1794                 switch ($size) {
1795                         case Proxy::SIZE_MICRO:
1796                                 $url .= Proxy::PIXEL_MICRO . '/';
1797                                 break;
1798                         case Proxy::SIZE_THUMB:
1799                                 $url .= Proxy::PIXEL_THUMB . '/';
1800                                 break;
1801                         case Proxy::SIZE_SMALL:
1802                                 $url .= Proxy::PIXEL_SMALL . '/';
1803                                 break;
1804                         case Proxy::SIZE_MEDIUM:
1805                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1806                                 break;
1807                         case Proxy::SIZE_LARGE:
1808                                 $url .= Proxy::PIXEL_LARGE . '/';
1809                                 break;
1810                 }
1811                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1812         }
1813
1814         /**
1815          * Get avatar link for given contact URL
1816          *
1817          * @param string  $url  contact url
1818          * @param integer $uid  user id
1819          * @param string  $size One of the Proxy::SIZE_* constants
1820          * @return string avatar link
1821          */
1822         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1823         {
1824                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1825                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1826                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1827                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1828         }
1829
1830         /**
1831          * Get header link for given contact id
1832          *
1833          * @param integer $cid     contact id
1834          * @param string  $size    One of the Proxy::SIZE_* constants
1835          * @param string  $updated Contact update date
1836          * @return string header link
1837          */
1838         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1839         {
1840                 // We have to fetch the "updated" variable when it wasn't provided
1841                 // The parameter can be provided to improve performance
1842                 if (empty($updated) || empty($guid)) {
1843                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1844                         $updated = $account['updated'] ?? '';
1845                         $guid = $account['guid'] ?? '';
1846                 }
1847
1848                 $guid = urlencode($guid);
1849
1850                 $url = DI::baseUrl() . '/photo/header/';
1851                 switch ($size) {
1852                         case Proxy::SIZE_MICRO:
1853                                 $url .= Proxy::PIXEL_MICRO . '/';
1854                                 break;
1855                         case Proxy::SIZE_THUMB:
1856                                 $url .= Proxy::PIXEL_THUMB . '/';
1857                                 break;
1858                         case Proxy::SIZE_SMALL:
1859                                 $url .= Proxy::PIXEL_SMALL . '/';
1860                                 break;
1861                         case Proxy::SIZE_MEDIUM:
1862                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1863                                 break;
1864                         case Proxy::SIZE_LARGE:
1865                                 $url .= Proxy::PIXEL_LARGE . '/';
1866                                 break;
1867                 }
1868
1869                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1870         }
1871
1872         /**
1873          * Updates the avatar links in a contact only if needed
1874          *
1875          * @param int    $cid          Contact id
1876          * @param string $avatar       Link to avatar picture
1877          * @param bool   $force        force picture update
1878          * @param bool   $create_cache Enforces the creation of cached avatar fields
1879          *
1880          * @return void
1881          * @throws HTTPException\InternalServerErrorException
1882          * @throws HTTPException\NotFoundException
1883          * @throws \ImagickException
1884          */
1885         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1886         {
1887                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1888                         ['id' => $cid, 'self' => false]);
1889                 if (!DBA::isResult($contact)) {
1890                         return;
1891                 }
1892
1893                 $uid = $contact['uid'];
1894
1895                 // Only update the cached photo links of public contacts when they already are cached
1896                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1897                         if ($contact['avatar'] != $avatar) {
1898                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1899                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1900                         }
1901                         return;
1902                 }
1903
1904                 // User contacts use are updated through the public contacts
1905                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1906                         $pcid = self::getIdForURL($contact['url'], 0, false);
1907                         if (!empty($pcid)) {
1908                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1909                                 self::updateAvatar($pcid, $avatar, $force, true);
1910                                 return;
1911                         }
1912                 }
1913
1914                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1915
1916                 if ($default_avatar) {
1917                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1918                 }
1919
1920                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
1921
1922                 // Local contact avatars don't need to be cached
1923                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
1924                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
1925                 }
1926
1927                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
1928                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
1929                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1930                                         'photo' => $avatar,
1931                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1932                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1933                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1934                         }
1935
1936                         // Use the data from the self account
1937                         if (empty($fields)) {
1938                                 $local_uid = User::getIdForURL($contact['url']);
1939                                 if (!empty($local_uid)) {
1940                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1941                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1942                                 }
1943                         }
1944
1945                         if (empty($fields)) {
1946                                 $update = ($contact['avatar'] != $avatar) || $force;
1947
1948                                 if (!$update) {
1949                                         $data = [
1950                                                 $contact['photo'] ?? '',
1951                                                 $contact['thumb'] ?? '',
1952                                                 $contact['micro'] ?? '',
1953                                         ];
1954
1955                                         foreach ($data as $image_uri) {
1956                                                 $image_rid = Photo::ridFromURI($image_uri);
1957                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1958                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1959                                                         $update = true;
1960                                                 }
1961                                         }
1962                                 }
1963
1964                                 if ($update) {
1965                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1966                                         if ($photos) {
1967                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1968                                                 $update = !empty($fields);
1969                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1970                                         } else {
1971                                                 $update = false;
1972                                         }
1973                                 }
1974                         } else {
1975                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1976                         }
1977                 } else {
1978                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
1979                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1980                                 'photo' => '', 'thumb' => '', 'micro' => ''];
1981                         $update = ($avatar != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1982                 }
1983
1984                 if (!$update) {
1985                         return;
1986                 }
1987
1988                 $cids = [];
1989                 $uids = [];
1990                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1991                         // Collect all user contacts of the given public contact
1992                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1993                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1994                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1995                                 $cids[] = $personal_contact['id'];
1996                                 $uids[] = $personal_contact['uid'];
1997                         }
1998                         DBA::close($personal_contacts);
1999
2000                         if (!empty($cids)) {
2001                                 // Delete possibly existing cached user contact avatars
2002                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
2003                         }
2004                 }
2005
2006                 $cids[] = $cid;
2007                 $uids[] = $uid;
2008                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2009                 self::update($fields, ['id' => $cids]);
2010         }
2011
2012         public static function deleteContactByUrl(string $url)
2013         {
2014                 // Update contact data for all users
2015                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2016                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2017                 while ($contact = DBA::fetch($contacts)) {
2018                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2019                         self::remove($contact['id']);
2020                 }
2021         }
2022
2023         /**
2024          * Helper function for "updateFromProbe". Updates personal and public contact
2025          *
2026          * @param integer $id      contact id
2027          * @param integer $uid     user id
2028          * @param string  $old_url The previous profile URL of the contact
2029          * @param string  $new_url The profile URL of the contact
2030          * @param array   $fields  The fields that are updated
2031          *
2032          * @throws \Exception
2033          */
2034         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
2035         {
2036                 if (!self::update($fields, ['id' => $id])) {
2037                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2038                         return;
2039                 }
2040
2041                 // Search for duplicated contacts and get rid of them
2042                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
2043                         return;
2044                 }
2045
2046                 // Archive or unarchive the contact.
2047                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2048                 if (!DBA::isResult($contact)) {
2049                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2050                         return;
2051                 }
2052
2053                 if (isset($fields['failed'])) {
2054                         if ($fields['failed']) {
2055                                 self::markForArchival($contact);
2056                         } else {
2057                                 self::unmarkForArchival($contact);
2058                         }
2059                 }
2060
2061                 if ($contact['uid'] != 0) {
2062                         return;
2063                 }
2064
2065                 // Update contact data for all users
2066                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
2067
2068                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2069                 self::update($fields, $condition);
2070
2071                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2072                 $condition['network'] = Protocol::OSTATUS;
2073
2074                 // If the contact failed, propagate the update fields to all contacts
2075                 if (empty($fields['failed'])) {
2076                         unset($fields['last-update']);
2077                         unset($fields['success_update']);
2078                         unset($fields['failure_update']);
2079                 }
2080
2081                 if (empty($fields)) {
2082                         return;
2083                 }
2084
2085                 self::update($fields, $condition);
2086         }
2087
2088         /**
2089          * Remove duplicated contacts
2090          *
2091          * @param string  $nurl  Normalised contact url
2092          * @param integer $uid   User id
2093          * @return boolean
2094          * @throws \Exception
2095          */
2096         public static function removeDuplicates(string $nurl, int $uid)
2097         {
2098                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2099                 $count = DBA::count('contact', $condition);
2100                 if ($count <= 1) {
2101                         return false;
2102                 }
2103
2104                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2105                 if (!DBA::isResult($first_contact)) {
2106                         // Shouldn't happen - so we handle it
2107                         return false;
2108                 }
2109
2110                 $first = $first_contact['id'];
2111                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2112                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2113                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2114                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2115                         return false;
2116                 }
2117
2118                 // Find all duplicates
2119                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2120                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2121                 while ($duplicate = DBA::fetch($duplicates)) {
2122                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2123                                 continue;
2124                         }
2125
2126                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2127                 }
2128                 DBA::close($duplicates);
2129                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2130                 return true;
2131         }
2132
2133         /**
2134          * @param integer $id      contact id
2135          * @param string  $network Optional network we are probing for
2136          * @return boolean
2137          * @throws HTTPException\InternalServerErrorException
2138          * @throws \ImagickException
2139          */
2140         public static function updateFromProbe(int $id, string $network = '')
2141         {
2142                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2143                 if (!DBA::isResult($contact)) {
2144                         return false;
2145                 }
2146
2147                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2148
2149                 if ($ret['network'] == Protocol::DIASPORA) {
2150                         FContact::updateFromProbeArray($ret);
2151                 }
2152
2153                 return self::updateFromProbeArray($id, $ret);
2154         }
2155
2156         /**
2157          * @param integer $id      contact id
2158          * @param array   $ret     Probed data
2159          * @return boolean
2160          * @throws HTTPException\InternalServerErrorException
2161          * @throws \ImagickException
2162          */
2163         private static function updateFromProbeArray(int $id, array $ret)
2164         {
2165                 /*
2166                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2167                   This will reliably kill your communication with old Friendica contacts.
2168                  */
2169
2170                 // These fields aren't updated by this routine:
2171                 // 'sensitive'
2172
2173                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2174                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2175                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2176                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2177                 if (!DBA::isResult($contact)) {
2178                         return false;
2179                 }
2180
2181                 if (self::isLocal($ret['url'])) {
2182                         if ($contact['uid'] == 0) {
2183                                 Logger::info('Local contacts are not updated here.');
2184                         } else {
2185                                 self::updateFromPublicContact($id, $contact);
2186                         }
2187                         return true;
2188                 }
2189
2190                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2191                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2192                         self::remove($id);
2193
2194                         // Delete all contacts with the same URL
2195                         self::deleteContactByUrl($ret['url']);
2196                         return true;
2197                 }
2198
2199                 $uid = $contact['uid'];
2200                 unset($contact['uid']);
2201
2202                 $uriid = $contact['uri-id'];
2203                 unset($contact['uri-id']);
2204
2205                 $pubkey = $contact['pubkey'];
2206                 unset($contact['pubkey']);
2207
2208                 $contact['photo'] = $contact['avatar'];
2209                 unset($contact['avatar']);
2210
2211                 $updated = DateTimeFormat::utcNow();
2212
2213                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2214                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2215                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2216                         return false;
2217                 }
2218
2219                 // We must not try to update relay contacts via probe. They are no real contacts.
2220                 // We check after the probing to be able to correct falsely detected contact types.
2221                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2222                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2223                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2224                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2225                         return true;
2226                 }
2227
2228                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2229                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2230                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2231                         return false;
2232                 }
2233
2234                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2235                         $cid = self::getIdForURL($ret['url'], 0, false);
2236                         if (!empty($cid) && ($cid != $id)) {
2237                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2238                                 return self::updateFromProbeArray($cid, $ret);
2239                         }
2240                 }
2241
2242                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2243                         $ret['unsearchable'] = $ret['hide'];
2244                 }
2245
2246                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2247                         $ret['forum'] = false;
2248                         $ret['prv'] = false;
2249                         $ret['contact-type'] = $ret['account-type'];
2250                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2251                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2252                                 $ret['prv'] = (bool)!$ret['forum'];
2253                         }
2254                 }
2255
2256                 $new_pubkey = $ret['pubkey'] ?? '';
2257
2258                 if ($uid == 0) {
2259                         $ret['last-item'] = Probe::getLastUpdate($ret);
2260                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2261                 }
2262
2263                 $update = false;
2264                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2265
2266                 // make sure to not overwrite existing values with blank entries except some technical fields
2267                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2268                 foreach ($ret as $key => $val) {
2269                         if (!array_key_exists($key, $contact)) {
2270                                 unset($ret[$key]);
2271                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2272                                 $ret[$key] = $contact[$key];
2273                         } elseif ($ret[$key] != $contact[$key]) {
2274                                 $update = true;
2275                         }
2276                 }
2277
2278                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2279                         $update = true;
2280                 } else {
2281                         unset($ret['last-item']);
2282                 }
2283
2284                 if (empty($uriid)) {
2285                         $update = true;
2286                 }
2287
2288                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2289                         self::updateAvatar($id, $ret['photo'], $update);
2290                 }
2291
2292                 $uriid = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2293
2294                 if (!$update) {
2295                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2296
2297                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2298                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2299                         }
2300
2301                         // Update the public contact
2302                         if ($uid != 0) {
2303                                 $contact = self::getByURL($ret['url'], false, ['id']);
2304                                 if (!empty($contact['id'])) {
2305                                         self::updateFromProbeArray($contact['id'], $ret);
2306                                 }
2307                         }
2308
2309                         return true;
2310                 }
2311
2312                 $ret['uri-id']  = $uriid;
2313                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2314                 $ret['updated'] = $updated;
2315                 $ret['failed']  = false;
2316
2317                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2318                 if (empty($pubkey) && !empty($new_pubkey)) {
2319                         $ret['pubkey'] = $new_pubkey;
2320                 }
2321
2322                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2323                         $ret['uri-date'] = $updated;
2324                 }
2325
2326                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2327                         $ret['name-date'] = $updated;
2328                 }
2329
2330                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2331                         $ret['last-update'] = $updated;
2332                         $ret['success_update'] = $updated;
2333                 }
2334
2335                 unset($ret['photo']);
2336
2337                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2338
2339                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2340                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2341                 }
2342
2343                 return true;
2344         }
2345
2346         private static function updateFromPublicContact(int $id, array $contact)
2347         {
2348                 $public = self::getByURL($contact['url'], false);
2349
2350                 $fields = [];
2351
2352                 foreach ($contact as $field => $value) {
2353                         if ($field == 'uid') {
2354                                 continue;
2355                         }
2356                         if ($public[$field] != $value) {
2357                                 $fields[$field] = $public[$field];
2358                         }
2359                 }
2360                 if (!empty($fields)) {
2361                         self::update($fields, ['id' => $id, 'self' => false]);
2362                         Logger::info('Updating local contact', ['id' => $id]);
2363                 }
2364         }
2365
2366         /**
2367          * @param integer $url contact url
2368          * @return integer Contact id
2369          * @throws HTTPException\InternalServerErrorException
2370          * @throws \ImagickException
2371          */
2372         public static function updateFromProbeByURL($url)
2373         {
2374                 $id = self::getIdForURL($url);
2375
2376                 if (empty($id)) {
2377                         return $id;
2378                 }
2379
2380                 self::updateFromProbe($id);
2381
2382                 return $id;
2383         }
2384
2385         /**
2386          * Detects the communication protocol for a given contact url.
2387          * This is used to detect Friendica contacts that we can communicate via AP.
2388          *
2389          * @param string $url contact url
2390          * @param string $network Network of that contact
2391          * @return string with protocol
2392          */
2393         public static function getProtocol($url, $network)
2394         {
2395                 if ($network != Protocol::DFRN) {
2396                         return $network;
2397                 }
2398
2399                 $apcontact = APContact::getByURL($url);
2400                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2401                         return Protocol::ACTIVITYPUB;
2402                 } else {
2403                         return $network;
2404                 }
2405         }
2406
2407         /**
2408          * Takes a $uid and a url/handle and adds a new contact
2409          *
2410          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2411          * dfrn_request page.
2412          *
2413          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2414          *
2415          * Returns an array
2416          * $return['success'] boolean true if successful
2417          * $return['message'] error text if success is false.
2418          *
2419          * Takes a $uid and a url/handle and adds a new contact
2420          *
2421          * @param int    $uid         The user id the contact should be created for
2422          * @param string $url         The profile URL of the contact
2423          * @param string $network
2424          * @return array
2425          * @throws HTTPException\InternalServerErrorException
2426          * @throws HTTPException\NotFoundException
2427          * @throws \ImagickException
2428          */
2429         public static function createFromProbeForUser(int $uid, $url, $network = '')
2430         {
2431                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2432
2433                 // remove ajax junk, e.g. Twitter
2434                 $url = str_replace('/#!/', '/', $url);
2435
2436                 if (!Network::isUrlAllowed($url)) {
2437                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2438                         return $result;
2439                 }
2440
2441                 if (Network::isUrlBlocked($url)) {
2442                         $result['message'] = DI::l10n()->t('Blocked domain');
2443                         return $result;
2444                 }
2445
2446                 if (!$url) {
2447                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2448                         return $result;
2449                 }
2450
2451                 $arr = ['url' => $url, 'contact' => []];
2452
2453                 Hook::callAll('follow', $arr);
2454
2455                 if (empty($arr)) {
2456                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2457                         return $result;
2458                 }
2459
2460                 if (!empty($arr['contact']['name'])) {
2461                         $probed = false;
2462                         $ret = $arr['contact'];
2463                 } else {
2464                         $probed = true;
2465                         $ret = Probe::uri($url, $network, $uid);
2466                 }
2467
2468                 if (($network != '') && ($ret['network'] != $network)) {
2469                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2470                         return $result;
2471                 }
2472
2473                 // check if we already have a contact
2474                 // the poll url is more reliable than the profile url, as we may have
2475                 // indirect links or webfinger links
2476
2477                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2478                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2479                 if (!DBA::isResult($contact)) {
2480                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2481                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2482                 }
2483
2484                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2485
2486                 // This extra param just confuses things, remove it
2487                 if ($protocol === Protocol::DIASPORA) {
2488                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2489                 }
2490
2491                 // do we have enough information?
2492                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2493                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2494                         if (empty($ret['poll'])) {
2495                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2496                         }
2497                         if (empty($ret['name'])) {
2498                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2499                         }
2500                         if (empty($ret['url'])) {
2501                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2502                         }
2503                         if (strpos($ret['url'], '@') !== false) {
2504                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2505                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2506                         }
2507                         return $result;
2508                 }
2509
2510                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2511                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2512                         $ret['notify'] = '';
2513                 }
2514
2515                 if (!$ret['notify']) {
2516                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2517                 }
2518
2519                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2520
2521                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2522
2523                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2524
2525                 $pending = false;
2526                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2527                         $pending = (bool)$ret['manually-approve'];
2528                 }
2529
2530                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2531                         $writeable = 1;
2532                 }
2533
2534                 if (DBA::isResult($contact)) {
2535                         // update contact
2536                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2537
2538                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2539                         self::update($fields, ['id' => $contact['id']]);
2540                 } else {
2541                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2542
2543                         // create contact record
2544                         self::insert([
2545                                 'uid'     => $uid,
2546                                 'created' => DateTimeFormat::utcNow(),
2547                                 'url'     => $ret['url'],
2548                                 'nurl'    => Strings::normaliseLink($ret['url']),
2549                                 'addr'    => $ret['addr'],
2550                                 'alias'   => $ret['alias'],
2551                                 'batch'   => $ret['batch'],
2552                                 'notify'  => $ret['notify'],
2553                                 'poll'    => $ret['poll'],
2554                                 'poco'    => $ret['poco'],
2555                                 'name'    => $ret['name'],
2556                                 'nick'    => $ret['nick'],
2557                                 'network' => $ret['network'],
2558                                 'baseurl' => $ret['baseurl'],
2559                                 'gsid'    => $ret['gsid'] ?? null,
2560                                 'protocol' => $protocol,
2561                                 'pubkey'  => $ret['pubkey'],
2562                                 'rel'     => $new_relation,
2563                                 'priority'=> $ret['priority'],
2564                                 'writable'=> $writeable,
2565                                 'hidden'  => $hidden,
2566                                 'blocked' => 0,
2567                                 'readonly'=> 0,
2568                                 'pending' => $pending,
2569                                 'subhub'  => $subhub
2570                         ]);
2571                 }
2572
2573                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2574                 if (!DBA::isResult($contact)) {
2575                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2576                         return $result;
2577                 }
2578
2579                 $contact_id = $contact['id'];
2580                 $result['cid'] = $contact_id;
2581
2582                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
2583
2584                 // Update the avatar
2585                 self::updateAvatar($contact_id, $ret['photo']);
2586
2587                 // pull feed and consume it, which should subscribe to the hub.
2588                 if ($contact['network'] == Protocol::OSTATUS) {
2589                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2590                 }
2591
2592                 if ($probed) {
2593                         self::updateFromProbeArray($contact_id, $ret);
2594                 } else {
2595                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2596                 }
2597
2598                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
2599
2600                 return $result;
2601         }
2602
2603         /**
2604          * @param array  $importer Owner (local user) data
2605          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2606          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2607          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2608          * @param string $note     Introduction additional message
2609          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2610          * @throws HTTPException\InternalServerErrorException
2611          * @throws \ImagickException
2612          */
2613         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2614         {
2615                 // Should always be set
2616                 if (empty($datarray['author-id'])) {
2617                         return false;
2618                 }
2619
2620                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2621                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2622                 if (!DBA::isResult($pub_contact)) {
2623                         // Should never happen
2624                         return false;
2625                 }
2626
2627                 // Contact is blocked at node-level
2628                 if (self::isBlocked($datarray['author-id'])) {
2629                         return false;
2630                 }
2631
2632                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2633                 $name = $pub_contact['name'];
2634                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2635                 $nick = $pub_contact['nick'];
2636                 $network = $pub_contact['network'];
2637
2638                 // Ensure that we don't create a new contact when there already is one
2639                 $cid = self::getIdForURL($url, $importer['uid']);
2640                 if (!empty($cid)) {
2641                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2642                 }
2643
2644                 if (!empty($contact)) {
2645                         if (!empty($contact['pending'])) {
2646                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2647                                 return null;
2648                         }
2649
2650                         // Contact is blocked at user-level
2651                         if (!empty($contact['id']) && !empty($importer['id']) &&
2652                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2653                                 return false;
2654                         }
2655
2656                         // Make sure that the existing contact isn't archived
2657                         self::unmarkForArchival($contact);
2658
2659                         if (($contact['rel'] == self::SHARING)
2660                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2661                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2662                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2663                         }
2664
2665                         // Ensure to always have the correct network type, independent from the connection request method
2666                         self::updateFromProbe($contact['id']);
2667
2668                         Post\UserNotification::insertNotification($contact['id'], Activity::FOLLOW, $importer['uid']);
2669
2670                         return true;
2671                 } else {
2672                         // send email notification to owner?
2673                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2674                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
2675                                 return null;
2676                         }
2677
2678                         // create contact record
2679                         $contact_id = self::insert([
2680                                 'uid'      => $importer['uid'],
2681                                 'created'  => DateTimeFormat::utcNow(),
2682                                 'url'      => $url,
2683                                 'nurl'     => Strings::normaliseLink($url),
2684                                 'name'     => $name,
2685                                 'nick'     => $nick,
2686                                 'network'  => $network,
2687                                 'rel'      => self::FOLLOWER,
2688                                 'blocked'  => 0,
2689                                 'readonly' => 0,
2690                                 'pending'  => 1,
2691                                 'writable' => 1,
2692                         ]);
2693
2694                         // Ensure to always have the correct network type, independent from the connection request method
2695                         self::updateFromProbe($contact_id);
2696
2697                         self::updateAvatar($contact_id, $photo, true);
2698
2699                         Post\UserNotification::insertNotification($contact_id, Activity::FOLLOW, $importer['uid']);
2700
2701                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2702
2703                         /// @TODO Encapsulate this into a function/method
2704                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2705                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2706                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2707                                 // create notification
2708                                 if (is_array($contact_record)) {
2709                                         $intro = DI::introFactory()->createNew(
2710                                                 $importer['uid'],
2711                                                 $contact_record['id'],
2712                                                 $note
2713                                         );
2714                                         DI::intro()->save($intro);
2715                                 }
2716
2717                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
2718
2719                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2720                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2721
2722                                         DI::notify()->createFromArray([
2723                                                 'type'  => Notification\Type::INTRO,
2724                                                 'otype' => Notification\ObjectType::INTRO,
2725                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2726                                                 'uid'   => $user['uid'],
2727                                                 'cid'   => $contact_record['id'],
2728                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2729                                         ]);
2730                                 }
2731                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2732                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2733                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2734                                 }
2735
2736                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2737                                 $fields = ['pending' => false];
2738                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2739                                         $fields['rel'] = self::FRIEND;
2740                                 }
2741
2742                                 self::update($fields, $condition);
2743
2744                                 return true;
2745                         }
2746                 }
2747
2748                 return null;
2749         }
2750
2751         /**
2752          * Update the local relationship when a local user loses a follower
2753          *
2754          * @param array $contact User-specific contact (uid != 0) array
2755          * @throws HTTPException\InternalServerErrorException
2756          * @throws \ImagickException
2757          */
2758         public static function removeFollower(array $contact)
2759         {
2760                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2761                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
2762                 } elseif (!empty($contact['id'])) {
2763                         self::remove($contact['id']);
2764                 } else {
2765                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2766                 }
2767         }
2768
2769         /**
2770          * Update the local relationship when a local user unfollow a contact.
2771          * Removes the contact for sharing-only protocols (feed and mail).
2772          *
2773          * @param array $contact User-specific contact (uid != 0) array
2774          * @throws HTTPException\InternalServerErrorException
2775          */
2776         public static function removeSharer(array $contact)
2777         {
2778                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2779                         self::remove($contact['id']);
2780                 } else {
2781                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2782                 }
2783         }
2784
2785         /**
2786          * Create a birthday event.
2787          *
2788          * Update the year and the birthday.
2789          */
2790         public static function updateBirthdays()
2791         {
2792                 $condition = [
2793                         '`bd` > ?
2794                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2795                         AND NOT `contact`.`pending`
2796                         AND NOT `contact`.`hidden`
2797                         AND NOT `contact`.`blocked`
2798                         AND NOT `contact`.`archive`
2799                         AND NOT `contact`.`deleted`',
2800                         DBA::NULL_DATE,
2801                         self::SHARING,
2802                         self::FRIEND
2803                 ];
2804
2805                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2806
2807                 while ($contact = DBA::fetch($contacts)) {
2808                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
2809
2810                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2811
2812                         if (Event::createBirthday($contact, $nextbd)) {
2813                                 // update bdyear
2814                                 DBA::update(
2815                                         'contact',
2816                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2817                                         ['id' => $contact['id']]
2818                                 );
2819                         }
2820                 }
2821                 DBA::close($contacts);
2822         }
2823
2824         /**
2825          * Remove the unavailable contact ids from the provided list
2826          *
2827          * @param array $contact_ids Contact id list
2828          * @return array
2829          * @throws \Exception
2830          */
2831         public static function pruneUnavailable(array $contact_ids)
2832         {
2833                 if (empty($contact_ids)) {
2834                         return [];
2835                 }
2836
2837                 $contacts = self::selectToArray(['id'], [
2838                         'id'      => $contact_ids,
2839                         'blocked' => false,
2840                         'pending' => false,
2841                         'archive' => false,
2842                 ]);
2843
2844                 return array_column($contacts, 'id');
2845         }
2846
2847         /**
2848          * Returns a magic link to authenticate remote visitors
2849          *
2850          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2851          *
2852          * @param string $contact_url The address of the target contact profile
2853          * @param string $url         An url that we will be redirected to after the authentication
2854          *
2855          * @return string with "redir" link
2856          * @throws HTTPException\InternalServerErrorException
2857          * @throws \ImagickException
2858          */
2859         public static function magicLink($contact_url, $url = '')
2860         {
2861                 if (!Session::isAuthenticated()) {
2862                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2863                 }
2864
2865                 $contact = self::getByURL($contact_url, false);
2866                 if (empty($contact)) {
2867                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2868                 }
2869
2870                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2871                 unset($contact['uid']);
2872
2873                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2874         }
2875
2876         /**
2877          * Returns a magic link to authenticate remote visitors
2878          *
2879          * @param integer $cid The contact id of the target contact profile
2880          * @param string  $url An url that we will be redirected to after the authentication
2881          *
2882          * @return string with "redir" link
2883          * @throws HTTPException\InternalServerErrorException
2884          * @throws \ImagickException
2885          */
2886         public static function magicLinkById($cid, $url = '')
2887         {
2888                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2889
2890                 return self::magicLinkByContact($contact, $url);
2891         }
2892
2893         /**
2894          * Returns a magic link to authenticate remote visitors
2895          *
2896          * @param array  $contact The contact array with "uid", "network" and "url"
2897          * @param string $url     An url that we will be redirected to after the authentication
2898          *
2899          * @return string with "redir" link
2900          * @throws HTTPException\InternalServerErrorException
2901          * @throws \ImagickException
2902          */
2903         public static function magicLinkByContact($contact, $url = '')
2904         {
2905                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2906
2907                 if (!Session::isAuthenticated()) {
2908                         return $destination;
2909                 }
2910
2911                 // Only redirections to the same host do make sense
2912                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2913                         return $url;
2914                 }
2915
2916                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2917                         return 'contact/' . $contact['id'] . '/conversations';
2918                 }
2919
2920                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2921                         return $destination;
2922                 }
2923
2924                 if (empty($contact['id'])) {
2925                         return $destination;
2926                 }
2927
2928                 $redirect = 'redir/' . $contact['id'];
2929
2930                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2931                         $redirect .= '?url=' . $url;
2932                 }
2933
2934                 return $redirect;
2935         }
2936
2937         /**
2938          * Is the contact a forum?
2939          *
2940          * @param integer $contactid ID of the contact
2941          *
2942          * @return boolean "true" if it is a forum
2943          */
2944         public static function isForum($contactid)
2945         {
2946                 $fields = ['contact-type'];
2947                 $condition = ['id' => $contactid];
2948                 $contact = DBA::selectFirst('contact', $fields, $condition);
2949                 if (!DBA::isResult($contact)) {
2950                         return false;
2951                 }
2952
2953                 // Is it a forum?
2954                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
2955         }
2956
2957         /**
2958          * Can the remote contact receive private messages?
2959          *
2960          * @param array $contact
2961          * @return bool
2962          */
2963         public static function canReceivePrivateMessages(array $contact)
2964         {
2965                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2966                 $self = $contact['self'] ?? false;
2967
2968                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2969         }
2970
2971         /**
2972          * Search contact table by nick or name
2973          *
2974          * @param string $search Name or nick
2975          * @param string $mode   Search mode (e.g. "community")
2976          * @param int    $uid    User ID
2977          *
2978          * @return array with search results
2979          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2980          */
2981         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2982         {
2983                 if (empty($search)) {
2984                         return [];
2985                 }
2986
2987                 // check supported networks
2988                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
2989                 if (DI::config()->get('system', 'diaspora_enabled')) {
2990                         $networks[] = Protocol::DIASPORA;
2991                 }
2992
2993                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2994                         $networks[] = Protocol::OSTATUS;
2995                 }
2996
2997                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
2998
2999                 if ($uid == 0) {
3000                         $condition['blocked'] = false;
3001                 }
3002
3003                 // check if we search only communities or every contact
3004                 if ($mode === 'community') {
3005                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3006                 }
3007
3008                 $search .= '%';
3009
3010                 $condition = DBA::mergeConditions($condition,
3011                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3012                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3013
3014                 $contacts = self::selectToArray([], $condition);
3015                 return $contacts;
3016         }
3017
3018         /**
3019          * Add public contacts from an array
3020          *
3021          * @param array $urls
3022          * @return array result "count", "added" and "updated"
3023          */
3024         public static function addByUrls(array $urls)
3025         {
3026                 $added = 0;
3027                 $updated = 0;
3028                 $unchanged = 0;
3029                 $count = 0;
3030
3031                 foreach ($urls as $url) {
3032                         if (empty($url) || !is_string($url)) {
3033                                 continue;
3034                         }
3035                         $contact = self::getByURL($url, false, ['id', 'updated']);
3036                         if (empty($contact['id'])) {
3037                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3038                                 ++$added;
3039                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3040                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3041                                 ++$updated;
3042                         } else {
3043                                 ++$unchanged;
3044                         }
3045                         ++$count;
3046                 }
3047
3048                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3049         }
3050
3051         /**
3052          * Returns a random, global contact array of the current node
3053          *
3054          * @return array The profile array
3055          * @throws Exception
3056          */
3057         public static function getRandomContact()
3058         {
3059                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3060                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3061                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3062                 ], ['order' => ['RAND()']]);
3063
3064                 if (DBA::isResult($contact)) {
3065                         return $contact;
3066                 }
3067
3068                 return [];
3069         }
3070 }