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          * @param array   $contact  Contact unfriended
 844          * @return bool|null Whether the remote operation is successful or null if no remote operation was performed
 845          * @throws HTTPException\InternalServerErrorException
 846          * @throws \ImagickException
 847          */
 848         public static function revokeFollow(array $contact): ?bool
 849         {
 850                 if (empty($contact['network'])) {
 851                         throw new \InvalidArgumentException('Empty network in contact array');
 852                 }
 853
 854                 if (empty($contact['uid'])) {
 855                         throw new \InvalidArgumentException('Unexpected public contact record');
 856                 }
 857
 858                 $result = Protocol::revokeFollow($contact);
 859
 860                 // A null value here means the remote network doesn't support explicit follow revocation, we can still
 861                 // break the locally recorded relationship
 862                 if ($result !== false) {
 863                         if ($contact['rel'] == self::FRIEND) {
 864                                 self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
 865                         } else {
 866                                 self::remove($contact['id']);
 867                         }
 868                 }
 869
 870                 return $result;
 871         }
 872
 873         /**
 874          * Completely severs a relationship with a contact
 875          *
 876          * @param array $contact User-specific contact (uid != 0) array
 877          * @throws HTTPException\InternalServerErrorException
 878          * @throws \ImagickException
 879          */
 880         public static function terminateFriendship(array $contact)
 881         {
 882                 if (empty($contact['network'])) {
 883                         throw new \InvalidArgumentException('Empty network in contact array');
 884                 }
 885
 886                 if (empty($contact['uid'])) {
 887                         throw new \InvalidArgumentException('Unexpected public contact record');
 888                 }
 889
 890                 $cdata = Contact::getPublicAndUserContactID($contact['id'], $contact['uid']);
 891
 892                 if (in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 893                         Worker::add(PRIORITY_HIGH, 'Contact\Unfollow', $cdata['public'], $contact['uid']);
 894                 }
 895
 896                 if (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND])) {
 897                         Worker::add(PRIORITY_HIGH, 'Contact\RevokeFollow', $cdata['public'], $contact['uid']);
 898                 }
 899
 900                 self::remove($contact['id']);
 901         }
 902
 903
 904         /**
 905          * Marks a contact for archival after a communication issue delay
 906          *
 907          * Contact has refused to recognise us as a friend. We will start a countdown.
 908          * If they still don't recognise us in 32 days, the relationship is over,
 909          * and we won't waste any more time trying to communicate with them.
 910          * This provides for the possibility that their database is temporarily messed
 911          * up or some other transient event and that there's a possibility we could recover from it.
 912          *
 913          * @param array $contact contact to mark for archival
 914          * @return null
 915          * @throws HTTPException\InternalServerErrorException
 916          */
 917         public static function markForArchival(array $contact)
 918         {
 919                 if (!isset($contact['url']) && !empty($contact['id'])) {
 920                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 921                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 922                         if (!DBA::isResult($contact)) {
 923                                 return;
 924                         }
 925                 } elseif (!isset($contact['url'])) {
 926                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 927                 }
 928
 929                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 930
 931                 // Contact already archived or "self" contact? => nothing to do
 932                 if ($contact['archive'] || $contact['self']) {
 933                         return;
 934                 }
 935
 936                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 937                         self::update(['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 938                         self::update(['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 939                 } else {
 940                         /* @todo
 941                          * We really should send a notification to the owner after 2-3 weeks
 942                          * so they won't be surprised when the contact vanishes and can take
 943                          * remedial action if this was a serious mistake or glitch
 944                          */
 945
 946                         /// @todo Check for contact vitality via probing
 947                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 948
 949                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 950                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 951                                 /* Relationship is really truly dead. archive them rather than
 952                                  * delete, though if the owner tries to unarchive them we'll start
 953                                  * the whole process over again.
 954                                  */
 955                                 self::update(['archive' => true], ['id' => $contact['id']]);
 956                                 self::update(['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 957                         }
 958                 }
 959         }
 960
 961         /**
 962          * Cancels the archival countdown
 963          *
 964          * @see   Contact::markForArchival()
 965          *
 966          * @param array $contact contact to be unmarked for archival
 967          * @return null
 968          * @throws \Exception
 969          */
 970         public static function unmarkForArchival(array $contact)
 971         {
 972                 // Always unarchive the relay contact entry
 973                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 974                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 975                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 976                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 977                                 self::update($fields, $condition);
 978                         }
 979                 }
 980
 981                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 982                 $exists = DBA::exists('contact', $condition);
 983
 984                 // We don't need to update, we never marked this contact for archival
 985                 if (!$exists) {
 986                         return;
 987                 }
 988
 989                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 990
 991                 if (!isset($contact['url']) && !empty($contact['id'])) {
 992                         $fields = ['id', 'url', 'batch'];
 993                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 994                         if (!DBA::isResult($contact)) {
 995                                 return;
 996                         }
 997                 }
 998
 999                 // It's a miracle. Our dead contact has inexplicably come back to life.
1000                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
1001                 self::update($fields, ['id' => $contact['id']]);
1002                 self::update($fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1003         }
1004
1005         /**
1006          * Returns the data array for the photo menu of a given contact
1007          *
1008          * @param array $contact contact
1009          * @param int   $uid     optional, default 0
1010          * @return array
1011          * @throws HTTPException\InternalServerErrorException
1012          * @throws \ImagickException
1013          */
1014         public static function photoMenu(array $contact, $uid = 0)
1015         {
1016                 $pm_url = '';
1017                 $status_link = '';
1018                 $photos_link = '';
1019                 $poke_link = '';
1020
1021                 if ($uid == 0) {
1022                         $uid = local_user();
1023                 }
1024
1025                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1026                         if ($uid == 0) {
1027                                 $profile_link = self::magicLinkByContact($contact);
1028                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1029
1030                                 return $menu;
1031                         }
1032
1033                         // Look for our own contact if the uid doesn't match and isn't public
1034                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1035                         if (DBA::isResult($contact_own)) {
1036                                 return self::photoMenu($contact_own, $uid);
1037                         }
1038                 }
1039
1040                 $sparkle = false;
1041                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1042                         $sparkle = true;
1043                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1044                 } else {
1045                         $profile_link = $contact['url'];
1046                 }
1047
1048                 if ($profile_link === 'mailbox') {
1049                         $profile_link = '';
1050                 }
1051
1052                 if ($sparkle) {
1053                         $status_link = $profile_link . '/status';
1054                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1055                         $profile_link = $profile_link . '/profile';
1056                 }
1057
1058                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1059                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1060                 }
1061
1062                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1063                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1064                 }
1065
1066                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1067
1068                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1069
1070                 $follow_link = '';
1071                 $unfollow_link = '';
1072                 if (!$contact['self'] && Protocol::supportsFollow($contact['network'])) {
1073                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1074                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
1075                         } elseif(!$contact['pending']) {
1076                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
1077                         }
1078                 }
1079
1080                 /**
1081                  * Menu array:
1082                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1083                  */
1084                 if (empty($contact['uid'])) {
1085                         $menu = [
1086                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1087                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1088                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1089                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1090                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1091                         ];
1092                 } else {
1093                         $menu = [
1094                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1095                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1096                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1097                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1098                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1099                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1100                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1101                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1102                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1103                         ];
1104
1105                         if (!empty($contact['pending'])) {
1106                                 try {
1107                                         $intro = DI::intro()->selectForContact($contact['id']);
1108                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro->id, true];
1109                                 } catch (IntroductionNotFoundException $exception) {
1110                                         DI::logger()->error('Pending contact doesn\'t have an introduction.', ['exception' => $exception]);
1111                                 }
1112                         }
1113                 }
1114
1115                 $args = ['contact' => $contact, 'menu' => &$menu];
1116
1117                 Hook::callAll('contact_photo_menu', $args);
1118
1119                 $menucondensed = [];
1120
1121                 foreach ($menu as $menuname => $menuitem) {
1122                         if ($menuitem[1] != '') {
1123                                 $menucondensed[$menuname] = $menuitem;
1124                         }
1125                 }
1126
1127                 return $menucondensed;
1128         }
1129
1130         /**
1131          * Fetch the contact id for a given URL and user
1132          *
1133          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1134          * `addr` or `alias`.
1135          *
1136          * If there's no record and we aren't looking for a public contact, we quit.
1137          * If there's one, we check that it isn't time to update the picture else we
1138          * directly return the found contact id.
1139          *
1140          * Second, we probe the provided $url whether it's http://server.tld/profile or
1141          * nick@server.tld. We quit if we can't get any info back.
1142          *
1143          * Third, we create the contact record if it doesn't exist
1144          *
1145          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1146          * if there's any updates
1147          *
1148          * @param string  $url       Contact URL
1149          * @param integer $uid       The user id for the contact (0 = public contact)
1150          * @param boolean $update    true = always update, false = never update, null = update when not found
1151          * @param array   $default   Default value for creating the contact when everything else fails
1152          *
1153          * @return integer Contact ID
1154          * @throws HTTPException\InternalServerErrorException
1155          * @throws \ImagickException
1156          */
1157         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1158         {
1159                 $contact_id = 0;
1160
1161                 if ($url == '') {
1162                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1163                         return 0;
1164                 }
1165
1166                 $contact = self::getByURL($url, false, ['id', 'network', 'uri-id'], $uid);
1167
1168                 if (!empty($contact)) {
1169                         $contact_id = $contact["id"];
1170
1171                         if (empty($update) && (!empty($contact['uri-id']) || is_bool($update))) {
1172                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1173                                 return $contact_id;
1174                         }
1175                 } elseif ($uid != 0) {
1176                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1177                         return 0;
1178                 } elseif (empty($default) && !is_null($update) && !$update) {
1179                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1180                         return 0;
1181                 }
1182
1183                 $data = [];
1184
1185                 if (empty($default['network']) || $update) {
1186                         $data = Probe::uri($url, "", $uid);
1187
1188                         // Take the default values when probing failed
1189                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1190                                 $data = array_merge($data, $default);
1191                         }
1192                 } elseif (!empty($default['network'])) {
1193                         $data = $default;
1194                 }
1195
1196                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1197                         // Fetch data for the public contact via the first found personal contact
1198                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1199                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1200                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1201                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1202
1203                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1204                         if (!DBA::isResult($personal_contact)) {
1205                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1206                         }
1207
1208                         if (DBA::isResult($personal_contact)) {
1209                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1210                                 $data = $personal_contact;
1211                                 $data['photo'] = $personal_contact['avatar'];
1212                                 $data['account-type'] = $personal_contact['contact-type'];
1213                                 $data['hide'] = $personal_contact['unsearchable'];
1214                                 unset($data['avatar']);
1215                                 unset($data['contact-type']);
1216                                 unset($data['unsearchable']);
1217                         }
1218                 }
1219
1220                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1221                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1222                         return 0;
1223                 }
1224
1225                 if (!$contact_id) {
1226                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1227                         if (!empty($data['alias'])) {
1228                                 $urls[] = Strings::normaliseLink($data['alias']);
1229                         }
1230                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1231                         if (!empty($contact['id'])) {
1232                                 $contact_id = $contact['id'];
1233                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1234                         }
1235                 }
1236
1237                 if (!$contact_id) {
1238                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1239                         $fields = [
1240                                 'uid'       => $uid,
1241                                 'url'       => $data['url'],
1242                                 'nurl'      => Strings::normaliseLink($data['url']),
1243                                 'network'   => $data['network'],
1244                                 'created'   => DateTimeFormat::utcNow(),
1245                                 'rel'       => self::SHARING,
1246                                 'writable'  => 1,
1247                                 'blocked'   => 0,
1248                                 'readonly'  => 0,
1249                                 'pending'   => 0];
1250
1251                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1252
1253                         // Before inserting we do check if the entry does exist now.
1254                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1255                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1256                                 if (DBA::isResult($contact)) {
1257                                         $contact_id = $contact['id'];
1258                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1259                                 } else {
1260                                         $contact_id = self::insert($fields);
1261                                         if ($contact_id) {
1262                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1263                                         }
1264                                 }
1265                                 DI::lock()->release(self::LOCK_INSERT);
1266                         } else {
1267                                 Logger::warning('Contact lock had not been acquired');
1268                         }
1269
1270                         if (!$contact_id) {
1271                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1272                                 return 0;
1273                         }
1274                 } else {
1275                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1276                 }
1277
1278                 if ($data['network'] == Protocol::DIASPORA) {
1279                         FContact::updateFromProbeArray($data);
1280                 }
1281
1282                 self::updateFromProbeArray($contact_id, $data);
1283
1284                 // Don't return a number for a deleted account
1285                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1286                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1287                         return 0;
1288                 }
1289
1290                 return $contact_id;
1291         }
1292
1293         /**
1294          * Checks if the contact is archived
1295          *
1296          * @param int $cid contact id
1297          *
1298          * @return boolean Is the contact archived?
1299          * @throws HTTPException\InternalServerErrorException
1300          */
1301         public static function isArchived(int $cid)
1302         {
1303                 if ($cid == 0) {
1304                         return false;
1305                 }
1306
1307                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1308                 if (!DBA::isResult($contact)) {
1309                         return false;
1310                 }
1311
1312                 if ($contact['archive']) {
1313                         return true;
1314                 }
1315
1316                 // Check status of ActivityPub endpoints
1317                 $apcontact = APContact::getByURL($contact['url'], false);
1318                 if (!empty($apcontact)) {
1319                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1320                                 return true;
1321                         }
1322
1323                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1324                                 return true;
1325                         }
1326                 }
1327
1328                 // Check status of Diaspora endpoints
1329                 if (!empty($contact['batch'])) {
1330                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1331                         return DBA::exists('contact', $condition);
1332                 }
1333
1334                 return false;
1335         }
1336
1337         /**
1338          * Checks if the contact is blocked
1339          *
1340          * @param int $cid contact id
1341          *
1342          * @return boolean Is the contact blocked?
1343          * @throws HTTPException\InternalServerErrorException
1344          */
1345         public static function isBlocked($cid)
1346         {
1347                 if ($cid == 0) {
1348                         return false;
1349                 }
1350
1351                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1352                 if (!DBA::isResult($blocked)) {
1353                         return false;
1354                 }
1355
1356                 if (Network::isUrlBlocked($blocked['url'])) {
1357                         return true;
1358                 }
1359
1360                 return (bool) $blocked['blocked'];
1361         }
1362
1363         /**
1364          * Checks if the contact is hidden
1365          *
1366          * @param int $cid contact id
1367          *
1368          * @return boolean Is the contact hidden?
1369          * @throws \Exception
1370          */
1371         public static function isHidden($cid)
1372         {
1373                 if ($cid == 0) {
1374                         return false;
1375                 }
1376
1377                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1378                 if (!DBA::isResult($hidden)) {
1379                         return false;
1380                 }
1381                 return (bool) $hidden['hidden'];
1382         }
1383
1384         /**
1385          * Returns posts from a given contact url
1386          *
1387          * @param string $contact_url Contact URL
1388          * @param bool   $thread_mode
1389          * @param int    $update      Update mode
1390          * @param int    $parent      Item parent ID for the update mode
1391          * @param bool   $only_media  Only display media content
1392          * @return string posts in HTML
1393          * @throws \Exception
1394          */
1395         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1396         {
1397                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent, $only_media);
1398         }
1399
1400         /**
1401          * Returns posts from a given contact id
1402          *
1403          * @param int  $cid         Contact ID
1404          * @param bool $thread_mode
1405          * @param int  $update      Update mode
1406          * @param int  $parent      Item parent ID for the update mode
1407          * @param bool $only_media  Only display media content
1408          * @return string posts in HTML
1409          * @throws \Exception
1410          */
1411         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0, bool $only_media = false)
1412         {
1413                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1414                 if (!DBA::isResult($contact)) {
1415                         return '';
1416                 }
1417
1418                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1419                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1420                 } else {
1421                         $sql = "`uid` = ?";
1422                 }
1423
1424                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1425
1426                 if ($thread_mode) {
1427                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1428                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1429                 } else {
1430                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1431                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1432                 }
1433
1434                 if (!empty($parent)) {
1435                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1436                 } else {
1437                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1438                         if (!empty($last_received)) {
1439                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1440                         }
1441                 }
1442
1443                 if ($only_media) {
1444                         $condition = DBA::mergeConditions($condition, ["`uri-id` IN (SELECT `uri-id` FROM `post-media` WHERE `type` IN (?, ?, ?))",
1445                                 Post\Media::AUDIO, Post\Media::IMAGE, Post\Media::VIDEO]);
1446                 }
1447
1448                 if (DI::mode()->isMobile()) {
1449                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1450                                 DI::config()->get('system', 'itemspage_network_mobile'));
1451                 } else {
1452                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1453                                 DI::config()->get('system', 'itemspage_network'));
1454                 }
1455
1456                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1457
1458                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1459
1460                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1461                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1462                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1463                 } else {
1464                         $o = '';
1465                 }
1466
1467                 if ($thread_mode) {
1468                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1469
1470                         $o .= DI::conversation()->create($items, 'contacts', $update, false, 'commented', local_user());
1471                 } else {
1472                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1473
1474                         $o .= DI::conversation()->create($items, 'contact-posts', $update);
1475                 }
1476
1477                 if (!$update) {
1478                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1479                                 $o .= HTML::scrollLoader();
1480                         } else {
1481                                 $o .= $pager->renderMinimal(count($items));
1482                         }
1483                 }
1484
1485                 return $o;
1486         }
1487
1488         /**
1489          * Returns the account type name
1490          *
1491          * The function can be called with either the user or the contact array
1492          *
1493          * @param int $type type of contact or account
1494          * @return string
1495          */
1496         public static function getAccountType(int $type)
1497         {
1498                 switch ($type) {
1499                         case self::TYPE_ORGANISATION:
1500                                 $account_type = DI::l10n()->t("Organisation");
1501                                 break;
1502
1503                         case self::TYPE_NEWS:
1504                                 $account_type = DI::l10n()->t('News');
1505                                 break;
1506
1507                         case self::TYPE_COMMUNITY:
1508                                 $account_type = DI::l10n()->t("Forum");
1509                                 break;
1510
1511                         default:
1512                                 $account_type = "";
1513                                 break;
1514                 }
1515
1516                 return $account_type;
1517         }
1518
1519         /**
1520          * Blocks a contact
1521          *
1522          * @param int $cid
1523          * @return bool
1524          * @throws \Exception
1525          */
1526         public static function block($cid, $reason = null)
1527         {
1528                 $return = self::update(['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1529
1530                 return $return;
1531         }
1532
1533         /**
1534          * Unblocks a contact
1535          *
1536          * @param int $cid
1537          * @return bool
1538          * @throws \Exception
1539          */
1540         public static function unblock($cid)
1541         {
1542                 $return = self::update(['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1543
1544                 return $return;
1545         }
1546
1547         /**
1548          * Ensure that cached avatar exist
1549          *
1550          * @param integer $cid
1551          */
1552         public static function checkAvatarCache(int $cid)
1553         {
1554                 $contact = DBA::selectFirst('contact', ['url', 'network', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1555                 if (!DBA::isResult($contact)) {
1556                         return;
1557                 }
1558
1559                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || DI::config()->get('system', 'cache_contact_avatar')) {
1560                         if (!empty($contact['avatar']) && (empty($contact['photo']) || empty($contact['thumb']) || empty($contact['micro']))) {
1561                                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1562                                 self::updateAvatar($cid, $contact['avatar'], true);
1563                                 return;
1564                         }
1565                 } elseif (!empty($contact['photo']) || !empty($contact['thumb']) || !empty($contact['micro'])) {
1566                         Logger::info('Removing avatar cache', ['id' => $cid, 'contact' => $contact]);
1567                         self::updateAvatar($cid, $contact['avatar'], true);
1568                         return;
1569                 }
1570         }
1571
1572         /**
1573          * Return the photo path for a given contact array in the given size
1574          *
1575          * @param array $contact    contact array
1576          * @param string $field     Fieldname of the photo in the contact array
1577          * @param string $size      Size of the avatar picture
1578          * @param string $avatar    Avatar path that is displayed when no photo had been found
1579          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1580          * @return string photo path
1581          */
1582         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1583         {
1584                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1585                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1586         }
1587
1588         /**
1589          * Return the photo path for a given contact array
1590          *
1591          * @param array  $contact   Contact array
1592          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1593          * @return string photo path
1594          */
1595         public static function getPhoto(array $contact, bool $no_update = false)
1596         {
1597                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1598         }
1599
1600         /**
1601          * Return the photo path (thumb size) for a given contact array
1602          *
1603          * @param array  $contact   Contact array
1604          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1605          * @return string photo path
1606          */
1607         public static function getThumb(array $contact, bool $no_update = false)
1608         {
1609                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1610         }
1611
1612         /**
1613          * Return the photo path (micro size) for a given contact array
1614          *
1615          * @param array  $contact   Contact array
1616          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1617          * @return string photo path
1618          */
1619         public static function getMicro(array $contact, bool $no_update = false)
1620         {
1621                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1622         }
1623
1624         /**
1625          * Check the given contact array for avatar cache fields
1626          *
1627          * @param array $contact
1628          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1629          * @return array contact array with avatar cache fields
1630          */
1631         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1632         {
1633                 $update = false;
1634                 $contact_fields = [];
1635                 $fields = ['photo', 'thumb', 'micro'];
1636                 foreach ($fields as $field) {
1637                         if (isset($contact[$field])) {
1638                                 $contact_fields[] = $field;
1639                         }
1640                         if (isset($contact[$field]) && empty($contact[$field])) {
1641                                 $update = true;
1642                         }
1643                 }
1644
1645                 if (!$update || $no_update) {
1646                         return $contact;
1647                 }
1648
1649                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1650                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1651
1652                         $new_contact = self::getById($contact['id'], $contact_fields);
1653                         if (DBA::isResult($new_contact)) {
1654                                 // We only update the cache fields
1655                                 $contact = array_merge($contact, $new_contact);
1656                         }
1657                 }
1658
1659                 /// add the default avatars if the fields aren't filled
1660                 if (isset($contact['photo']) && empty($contact['photo'])) {
1661                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1662                 }
1663                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1664                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1665                 }
1666                 if (isset($contact['micro']) && empty($contact['micro'])) {
1667                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1668                 }
1669
1670                 return $contact;
1671         }
1672
1673         /**
1674          * Fetch the default header for the given contact
1675          *
1676          * @param array $contact  contact array
1677          * @return string avatar URL
1678          */
1679         public static function getDefaultHeader(array $contact): string
1680         {
1681                 if (!empty($contact['header'])) {
1682                         return $contact['header'];
1683                 }
1684
1685                 if (!empty($contact['gsid'])) {
1686                         // Use default banners for certain platforms
1687                         $gserver = DBA::selectFirst('gserver', ['platform'], ['id' => $contact['gsid']]);
1688                         $platform = strtolower($gserver['platform'] ?? '');
1689                 } else {
1690                         $platform = '';
1691                 }
1692
1693                 switch ($platform) {
1694                         case 'friendica':
1695                         case 'friendika':
1696                                 /**
1697                                  * Picture credits
1698                                  * @author  Lostinlight <https://mastodon.xyz/@lightone>
1699                                  * @license CC0 https://creativecommons.org/share-your-work/public-domain/cc0/
1700                                  * @link    https://gitlab.com/lostinlight/per_aspera_ad_astra/-/blob/master/friendica-404/friendica-promo-bubbles.jpg
1701                                  */
1702                                 $header = DI::baseUrl() . '/images/friendica-banner.jpg';
1703                                 break;
1704                         case 'diaspora':
1705                                 /**
1706                                  * Picture credits
1707                                  * @author  John Liu <https://www.flickr.com/photos/8047705@N02/>
1708                                  * @license CC BY 2.0 https://creativecommons.org/licenses/by/2.0/
1709                                  * @link    https://www.flickr.com/photos/8047705@N02/5572197407
1710                                  */
1711                                 $header = DI::baseUrl() . '/images/diaspora-banner.jpg';
1712                                 break;
1713                         default:
1714                                 /**
1715                                  * Use a random picture.
1716                                  * The service provides random pictures from Unsplash.
1717                                  * @license https://unsplash.com/license
1718                                  */
1719                                 $header = 'https://picsum.photos/seed/' . hash('ripemd128', $contact['url']) . '/960/300';
1720                                 break;
1721                 }
1722
1723                 return $header;
1724         }
1725
1726         /**
1727          * Fetch the default avatar for the given contact and size
1728          *
1729          * @param array $contact  contact array
1730          * @param string $size    Size of the avatar picture
1731          * @return string avatar URL
1732          */
1733         public static function getDefaultAvatar(array $contact, string $size)
1734         {
1735                 switch ($size) {
1736                         case Proxy::SIZE_MICRO:
1737                                 $avatar['size'] = 48;
1738                                 $default = self::DEFAULT_AVATAR_MICRO;
1739                                 break;
1740
1741                         case Proxy::SIZE_THUMB:
1742                                 $avatar['size'] = 80;
1743                                 $default = self::DEFAULT_AVATAR_THUMB;
1744                                 break;
1745
1746                         case Proxy::SIZE_SMALL:
1747                         default:
1748                                 $avatar['size'] = 300;
1749                                 $default = self::DEFAULT_AVATAR_PHOTO;
1750                                 break;
1751                 }
1752
1753                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1754                         return DI::baseUrl() . $default;
1755                 }
1756
1757                 if (!empty($contact['xmpp'])) {
1758                         $avatar['email'] = $contact['xmpp'];
1759                 } elseif (!empty($contact['addr'])) {
1760                         $avatar['email'] = $contact['addr'];
1761                 } elseif (!empty($contact['url'])) {
1762                         $avatar['email'] = $contact['url'];
1763                 } else {
1764                         return DI::baseUrl() . $default;
1765                 }
1766
1767                 $avatar['url'] = '';
1768                 $avatar['success'] = false;
1769
1770                 Hook::callAll('avatar_lookup', $avatar);
1771
1772                 if ($avatar['success'] && !empty($avatar['url'])) {
1773                         return $avatar['url'];
1774                 }
1775
1776                 return DI::baseUrl() . $default;
1777         }
1778
1779         /**
1780          * Get avatar link for given contact id
1781          *
1782          * @param integer $cid     contact id
1783          * @param string  $size    One of the Proxy::SIZE_* constants
1784          * @param string  $updated Contact update date
1785          * @return string avatar link
1786          */
1787         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1788         {
1789                 // We have to fetch the "updated" variable when it wasn't provided
1790                 // The parameter can be provided to improve performance
1791                 if (empty($updated) || empty($guid)) {
1792                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1793                         $updated = $account['updated'] ?? '';
1794                         $guid = $account['guid'] ?? '';
1795                 }
1796
1797                 $guid = urlencode($guid);
1798
1799                 $url = DI::baseUrl() . '/photo/contact/';
1800                 switch ($size) {
1801                         case Proxy::SIZE_MICRO:
1802                                 $url .= Proxy::PIXEL_MICRO . '/';
1803                                 break;
1804                         case Proxy::SIZE_THUMB:
1805                                 $url .= Proxy::PIXEL_THUMB . '/';
1806                                 break;
1807                         case Proxy::SIZE_SMALL:
1808                                 $url .= Proxy::PIXEL_SMALL . '/';
1809                                 break;
1810                         case Proxy::SIZE_MEDIUM:
1811                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1812                                 break;
1813                         case Proxy::SIZE_LARGE:
1814                                 $url .= Proxy::PIXEL_LARGE . '/';
1815                                 break;
1816                 }
1817                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1818         }
1819
1820         /**
1821          * Get avatar link for given contact URL
1822          *
1823          * @param string  $url  contact url
1824          * @param integer $uid  user id
1825          * @param string  $size One of the Proxy::SIZE_* constants
1826          * @return string avatar link
1827          */
1828         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1829         {
1830                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1831                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1832                 $contact = self::selectFirst(['id', 'updated'], $condition, ['order' => ['uid' => true]]);
1833                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1834         }
1835
1836         /**
1837          * Get header link for given contact id
1838          *
1839          * @param integer $cid     contact id
1840          * @param string  $size    One of the Proxy::SIZE_* constants
1841          * @param string  $updated Contact update date
1842          * @return string header link
1843          */
1844         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''):string
1845         {
1846                 // We have to fetch the "updated" variable when it wasn't provided
1847                 // The parameter can be provided to improve performance
1848                 if (empty($updated) || empty($guid)) {
1849                         $account = DBA::selectFirst('account-user-view', ['updated', 'guid'], ['id' => $cid]);
1850                         $updated = $account['updated'] ?? '';
1851                         $guid = $account['guid'] ?? '';
1852                 }
1853
1854                 $guid = urlencode($guid);
1855
1856                 $url = DI::baseUrl() . '/photo/header/';
1857                 switch ($size) {
1858                         case Proxy::SIZE_MICRO:
1859                                 $url .= Proxy::PIXEL_MICRO . '/';
1860                                 break;
1861                         case Proxy::SIZE_THUMB:
1862                                 $url .= Proxy::PIXEL_THUMB . '/';
1863                                 break;
1864                         case Proxy::SIZE_SMALL:
1865                                 $url .= Proxy::PIXEL_SMALL . '/';
1866                                 break;
1867                         case Proxy::SIZE_MEDIUM:
1868                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1869                                 break;
1870                         case Proxy::SIZE_LARGE:
1871                                 $url .= Proxy::PIXEL_LARGE . '/';
1872                                 break;
1873                 }
1874
1875                 return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
1876         }
1877
1878         /**
1879          * Updates the avatar links in a contact only if needed
1880          *
1881          * @param int    $cid          Contact id
1882          * @param string $avatar       Link to avatar picture
1883          * @param bool   $force        force picture update
1884          * @param bool   $create_cache Enforces the creation of cached avatar fields
1885          *
1886          * @return void
1887          * @throws HTTPException\InternalServerErrorException
1888          * @throws HTTPException\NotFoundException
1889          * @throws \ImagickException
1890          */
1891         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1892         {
1893                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1894                         ['id' => $cid, 'self' => false]);
1895                 if (!DBA::isResult($contact)) {
1896                         return;
1897                 }
1898
1899                 $uid = $contact['uid'];
1900
1901                 // Only update the cached photo links of public contacts when they already are cached
1902                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1903                         if ($contact['avatar'] != $avatar) {
1904                                 self::update(['avatar' => $avatar], ['id' => $cid]);
1905                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1906                         }
1907                         return;
1908                 }
1909
1910                 // User contacts use are updated through the public contacts
1911                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1912                         $pcid = self::getIdForURL($contact['url'], 0, false);
1913                         if (!empty($pcid)) {
1914                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1915                                 self::updateAvatar($pcid, $avatar, $force, true);
1916                                 return;
1917                         }
1918                 }
1919
1920                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1921
1922                 if ($default_avatar) {
1923                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1924                 }
1925
1926                 $cache_avatar = DI::config()->get('system', 'cache_contact_avatar');
1927
1928                 // Local contact avatars don't need to be cached
1929                 if ($cache_avatar && Network::isLocalLink($contact['url'])) {
1930                         $cache_avatar = !DBA::exists('contact', ['nurl' => $contact['nurl'], 'self' => true]);
1931                 }
1932
1933                 if (in_array($contact['network'], [Protocol::FEED, Protocol::MAIL]) || $cache_avatar) {
1934                         if ($default_avatar && Proxy::isLocalImage($avatar)) {
1935                                 $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1936                                         'photo' => $avatar,
1937                                         'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1938                                         'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1939                                 Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1940                         }
1941
1942                         // Use the data from the self account
1943                         if (empty($fields)) {
1944                                 $local_uid = User::getIdForURL($contact['url']);
1945                                 if (!empty($local_uid)) {
1946                                         $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1947                                         Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1948                                 }
1949                         }
1950
1951                         if (empty($fields)) {
1952                                 $update = ($contact['avatar'] != $avatar) || $force;
1953
1954                                 if (!$update) {
1955                                         $data = [
1956                                                 $contact['photo'] ?? '',
1957                                                 $contact['thumb'] ?? '',
1958                                                 $contact['micro'] ?? '',
1959                                         ];
1960
1961                                         foreach ($data as $image_uri) {
1962                                                 $image_rid = Photo::ridFromURI($image_uri);
1963                                                 if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1964                                                         Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1965                                                         $update = true;
1966                                                 }
1967                                         }
1968                                 }
1969
1970                                 if ($update) {
1971                                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1972                                         if ($photos) {
1973                                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1974                                                 $update = !empty($fields);
1975                                                 Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1976                                         } else {
1977                                                 $update = false;
1978                                         }
1979                                 }
1980                         } else {
1981                                 $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1982                         }
1983                 } else {
1984                         Photo::delete(['uid' => $uid, 'contact-id' => $cid, 'photo-type' => Photo::CONTACT_AVATAR]);
1985                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1986                                 'photo' => '', 'thumb' => '', 'micro' => ''];
1987                         $update = ($avatar != $contact['avatar'] . $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1988                 }
1989
1990                 if (!$update) {
1991                         return;
1992                 }
1993
1994                 $cids = [];
1995                 $uids = [];
1996                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1997                         // Collect all user contacts of the given public contact
1998                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1999                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
2000                         while ($personal_contact = DBA::fetch($personal_contacts)) {
2001                                 $cids[] = $personal_contact['id'];
2002                                 $uids[] = $personal_contact['uid'];
2003                         }
2004                         DBA::close($personal_contacts);
2005
2006                         if (!empty($cids)) {
2007                                 // Delete possibly existing cached user contact avatars
2008                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'photo-type' => Photo::CONTACT_AVATAR]);
2009                         }
2010                 }
2011
2012                 $cids[] = $cid;
2013                 $uids[] = $uid;
2014                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
2015                 self::update($fields, ['id' => $cids]);
2016         }
2017
2018         public static function deleteContactByUrl(string $url)
2019         {
2020                 // Update contact data for all users
2021                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
2022                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
2023                 while ($contact = DBA::fetch($contacts)) {
2024                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
2025                         self::remove($contact['id']);
2026                 }
2027         }
2028
2029         /**
2030          * Helper function for "updateFromProbe". Updates personal and public contact
2031          *
2032          * @param integer $id      contact id
2033          * @param integer $uid     user id
2034          * @param string  $old_url The previous profile URL of the contact
2035          * @param string  $new_url The profile URL of the contact
2036          * @param array   $fields  The fields that are updated
2037          *
2038          * @throws \Exception
2039          */
2040         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
2041         {
2042                 if (!self::update($fields, ['id' => $id])) {
2043                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
2044                         return;
2045                 }
2046
2047                 // Search for duplicated contacts and get rid of them
2048                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
2049                         return;
2050                 }
2051
2052                 // Archive or unarchive the contact.
2053                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
2054                 if (!DBA::isResult($contact)) {
2055                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
2056                         return;
2057                 }
2058
2059                 if (isset($fields['failed'])) {
2060                         if ($fields['failed']) {
2061                                 self::markForArchival($contact);
2062                         } else {
2063                                 self::unmarkForArchival($contact);
2064                         }
2065                 }
2066
2067                 if ($contact['uid'] != 0) {
2068                         return;
2069                 }
2070
2071                 // Update contact data for all users
2072                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
2073
2074                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
2075                 self::update($fields, $condition);
2076
2077                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
2078                 $condition['network'] = Protocol::OSTATUS;
2079
2080                 // If the contact failed, propagate the update fields to all contacts
2081                 if (empty($fields['failed'])) {
2082                         unset($fields['last-update']);
2083                         unset($fields['success_update']);
2084                         unset($fields['failure_update']);
2085                 }
2086
2087                 if (empty($fields)) {
2088                         return;
2089                 }
2090
2091                 self::update($fields, $condition);
2092         }
2093
2094         /**
2095          * Remove duplicated contacts
2096          *
2097          * @param string  $nurl  Normalised contact url
2098          * @param integer $uid   User id
2099          * @return boolean
2100          * @throws \Exception
2101          */
2102         public static function removeDuplicates(string $nurl, int $uid)
2103         {
2104                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'self' => false, 'deleted' => false, 'network' => Protocol::FEDERATED];
2105                 $count = DBA::count('contact', $condition);
2106                 if ($count <= 1) {
2107                         return false;
2108                 }
2109
2110                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
2111                 if (!DBA::isResult($first_contact)) {
2112                         // Shouldn't happen - so we handle it
2113                         return false;
2114                 }
2115
2116                 $first = $first_contact['id'];
2117                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
2118                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
2119                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
2120                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
2121                         return false;
2122                 }
2123
2124                 // Find all duplicates
2125                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
2126                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
2127                 while ($duplicate = DBA::fetch($duplicates)) {
2128                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
2129                                 continue;
2130                         }
2131
2132                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
2133                 }
2134                 DBA::close($duplicates);
2135                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
2136                 return true;
2137         }
2138
2139         /**
2140          * @param integer $id      contact id
2141          * @param string  $network Optional network we are probing for
2142          * @return boolean
2143          * @throws HTTPException\InternalServerErrorException
2144          * @throws \ImagickException
2145          */
2146         public static function updateFromProbe(int $id, string $network = '')
2147         {
2148                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2149                 if (!DBA::isResult($contact)) {
2150                         return false;
2151                 }
2152
2153                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2154
2155                 if ($ret['network'] == Protocol::DIASPORA) {
2156                         FContact::updateFromProbeArray($ret);
2157                 }
2158
2159                 return self::updateFromProbeArray($id, $ret);
2160         }
2161
2162         /**
2163          * @param integer $id      contact id
2164          * @param array   $ret     Probed data
2165          * @return boolean
2166          * @throws HTTPException\InternalServerErrorException
2167          * @throws \ImagickException
2168          */
2169         private static function updateFromProbeArray(int $id, array $ret)
2170         {
2171                 /*
2172                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2173                   This will reliably kill your communication with old Friendica contacts.
2174                  */
2175
2176                 // These fields aren't updated by this routine:
2177                 // 'sensitive'
2178
2179                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2180                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2181                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item', 'xmpp', 'matrix'];
2182                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2183                 if (!DBA::isResult($contact)) {
2184                         return false;
2185                 }
2186
2187                 if (self::isLocal($ret['url'])) {
2188                         if ($contact['uid'] == 0) {
2189                                 Logger::info('Local contacts are not updated here.');
2190                         } else {
2191                                 self::updateFromPublicContact($id, $contact);
2192                         }
2193                         return true;
2194                 }
2195
2196                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2197                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2198                         self::remove($id);
2199
2200                         // Delete all contacts with the same URL
2201                         self::deleteContactByUrl($ret['url']);
2202                         return true;
2203                 }
2204
2205                 $uid = $contact['uid'];
2206                 unset($contact['uid']);
2207
2208                 $uriid = $contact['uri-id'];
2209                 unset($contact['uri-id']);
2210
2211                 $pubkey = $contact['pubkey'];
2212                 unset($contact['pubkey']);
2213
2214                 $contact['photo'] = $contact['avatar'];
2215                 unset($contact['avatar']);
2216
2217                 $updated = DateTimeFormat::utcNow();
2218
2219                 if (Strings::normaliseLink($contact['url']) != Strings::normaliseLink($ret['url'])) {
2220                         Logger::notice('New URL differs from old URL', ['id' => $id, 'uid' => $uid, 'old' => $contact['url'], 'new' => $ret['url']]);
2221                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2222                         return false;
2223                 }
2224
2225                 // We must not try to update relay contacts via probe. They are no real contacts.
2226                 // We check after the probing to be able to correct falsely detected contact types.
2227                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2228                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2229                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2230                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2231                         return true;
2232                 }
2233
2234                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2235                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2236                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2237                         return false;
2238                 }
2239
2240                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2241                         $cid = self::getIdForURL($ret['url'], 0, false);
2242                         if (!empty($cid) && ($cid != $id)) {
2243                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2244                                 return self::updateFromProbeArray($cid, $ret);
2245                         }
2246                 }
2247
2248                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2249                         $ret['unsearchable'] = $ret['hide'];
2250                 }
2251
2252                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2253                         $ret['forum'] = false;
2254                         $ret['prv'] = false;
2255                         $ret['contact-type'] = $ret['account-type'];
2256                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2257                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2258                                 $ret['prv'] = (bool)!$ret['forum'];
2259                         }
2260                 }
2261
2262                 $new_pubkey = $ret['pubkey'] ?? '';
2263
2264                 if ($uid == 0) {
2265                         $ret['last-item'] = Probe::getLastUpdate($ret);
2266                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2267                 }
2268
2269                 $update = false;
2270                 $guid = ($ret['guid'] ?? '') ?: Item::guidFromUri($ret['url'], parse_url($ret['url'], PHP_URL_HOST));
2271
2272                 // make sure to not overwrite existing values with blank entries except some technical fields
2273                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2274                 foreach ($ret as $key => $val) {
2275                         if (!array_key_exists($key, $contact)) {
2276                                 unset($ret[$key]);
2277                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2278                                 $ret[$key] = $contact[$key];
2279                         } elseif ($ret[$key] != $contact[$key]) {
2280                                 $update = true;
2281                         }
2282                 }
2283
2284                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2285                         $update = true;
2286                 } else {
2287                         unset($ret['last-item']);
2288                 }
2289
2290                 if (empty($uriid)) {
2291                         $update = true;
2292                 }
2293
2294                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2295                         self::updateAvatar($id, $ret['photo'], $update);
2296                 }
2297
2298                 $uriid = ItemURI::insert(['uri' => $ret['url'], 'guid' => $guid]);
2299
2300                 if (!$update) {
2301                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2302
2303                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2304                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2305                         }
2306
2307                         // Update the public contact
2308                         if ($uid != 0) {
2309                                 $contact = self::getByURL($ret['url'], false, ['id']);
2310                                 if (!empty($contact['id'])) {
2311                                         self::updateFromProbeArray($contact['id'], $ret);
2312                                 }
2313                         }
2314
2315                         return true;
2316                 }
2317
2318                 $ret['uri-id']  = $uriid;
2319                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2320                 $ret['updated'] = $updated;
2321                 $ret['failed']  = false;
2322
2323                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2324                 if (empty($pubkey) && !empty($new_pubkey)) {
2325                         $ret['pubkey'] = $new_pubkey;
2326                 }
2327
2328                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2329                         $ret['uri-date'] = $updated;
2330                 }
2331
2332                 if ((!empty($ret['name']) && ($ret['name'] != $contact['name'])) || (!empty($ret['nick']) && ($ret['nick'] != $contact['nick']))) {
2333                         $ret['name-date'] = $updated;
2334                 }
2335
2336                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2337                         $ret['last-update'] = $updated;
2338                         $ret['success_update'] = $updated;
2339                 }
2340
2341                 unset($ret['photo']);
2342
2343                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2344
2345                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2346                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2347                 }
2348
2349                 return true;
2350         }
2351
2352         private static function updateFromPublicContact(int $id, array $contact)
2353         {
2354                 $public = self::getByURL($contact['url'], false);
2355
2356                 $fields = [];
2357
2358                 foreach ($contact as $field => $value) {
2359                         if ($field == 'uid') {
2360                                 continue;
2361                         }
2362                         if ($public[$field] != $value) {
2363                                 $fields[$field] = $public[$field];
2364                         }
2365                 }
2366                 if (!empty($fields)) {
2367                         self::update($fields, ['id' => $id, 'self' => false]);
2368                         Logger::info('Updating local contact', ['id' => $id]);
2369                 }
2370         }
2371
2372         /**
2373          * @param integer $url contact url
2374          * @return integer Contact id
2375          * @throws HTTPException\InternalServerErrorException
2376          * @throws \ImagickException
2377          */
2378         public static function updateFromProbeByURL($url)
2379         {
2380                 $id = self::getIdForURL($url);
2381
2382                 if (empty($id)) {
2383                         return $id;
2384                 }
2385
2386                 self::updateFromProbe($id);
2387
2388                 return $id;
2389         }
2390
2391         /**
2392          * Detects the communication protocol for a given contact url.
2393          * This is used to detect Friendica contacts that we can communicate via AP.
2394          *
2395          * @param string $url contact url
2396          * @param string $network Network of that contact
2397          * @return string with protocol
2398          */
2399         public static function getProtocol($url, $network)
2400         {
2401                 if ($network != Protocol::DFRN) {
2402                         return $network;
2403                 }
2404
2405                 $apcontact = APContact::getByURL($url);
2406                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2407                         return Protocol::ACTIVITYPUB;
2408                 } else {
2409                         return $network;
2410                 }
2411         }
2412
2413         /**
2414          * Takes a $uid and a url/handle and adds a new contact
2415          *
2416          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2417          * dfrn_request page.
2418          *
2419          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2420          *
2421          * Returns an array
2422          * $return['success'] boolean true if successful
2423          * $return['message'] error text if success is false.
2424          *
2425          * Takes a $uid and a url/handle and adds a new contact
2426          *
2427          * @param int    $uid         The user id the contact should be created for
2428          * @param string $url         The profile URL of the contact
2429          * @param string $network
2430          * @return array
2431          * @throws HTTPException\InternalServerErrorException
2432          * @throws HTTPException\NotFoundException
2433          * @throws \ImagickException
2434          */
2435         public static function createFromProbeForUser(int $uid, $url, $network = '')
2436         {
2437                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2438
2439                 // remove ajax junk, e.g. Twitter
2440                 $url = str_replace('/#!/', '/', $url);
2441
2442                 if (!Network::isUrlAllowed($url)) {
2443                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2444                         return $result;
2445                 }
2446
2447                 if (Network::isUrlBlocked($url)) {
2448                         $result['message'] = DI::l10n()->t('Blocked domain');
2449                         return $result;
2450                 }
2451
2452                 if (!$url) {
2453                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2454                         return $result;
2455                 }
2456
2457                 $arr = ['url' => $url, 'contact' => []];
2458
2459                 Hook::callAll('follow', $arr);
2460
2461                 if (empty($arr)) {
2462                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2463                         return $result;
2464                 }
2465
2466                 if (!empty($arr['contact']['name'])) {
2467                         $probed = false;
2468                         $ret = $arr['contact'];
2469                 } else {
2470                         $probed = true;
2471                         $ret = Probe::uri($url, $network, $uid);
2472                 }
2473
2474                 if (($network != '') && ($ret['network'] != $network)) {
2475                         Logger::notice('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2476                         return $result;
2477                 }
2478
2479                 // check if we already have a contact
2480                 // the poll url is more reliable than the profile url, as we may have
2481                 // indirect links or webfinger links
2482
2483                 $condition = ['uid' => $uid, 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2484                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2485                 if (!DBA::isResult($contact)) {
2486                         $condition = ['uid' => $uid, 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2487                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2488                 }
2489
2490                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2491
2492                 // This extra param just confuses things, remove it
2493                 if ($protocol === Protocol::DIASPORA) {
2494                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2495                 }
2496
2497                 // do we have enough information?
2498                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2499                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2500                         if (empty($ret['poll'])) {
2501                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2502                         }
2503                         if (empty($ret['name'])) {
2504                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2505                         }
2506                         if (empty($ret['url'])) {
2507                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2508                         }
2509                         if (strpos($ret['url'], '@') !== false) {
2510                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2511                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2512                         }
2513                         return $result;
2514                 }
2515
2516                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2517                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2518                         $ret['notify'] = '';
2519                 }
2520
2521                 if (!$ret['notify']) {
2522                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2523                 }
2524
2525                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2526
2527                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2528
2529                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2530
2531                 $pending = false;
2532                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2533                         $pending = (bool)$ret['manually-approve'];
2534                 }
2535
2536                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2537                         $writeable = 1;
2538                 }
2539
2540                 if (DBA::isResult($contact)) {
2541                         // update contact
2542                         $new_relation = (in_array($contact['rel'], [self::FOLLOWER, self::FRIEND]) ? self::FRIEND : self::SHARING);
2543
2544                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2545                         self::update($fields, ['id' => $contact['id']]);
2546                 } else {
2547                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2548
2549                         // create contact record
2550                         self::insert([
2551                                 'uid'     => $uid,
2552                                 'created' => DateTimeFormat::utcNow(),
2553                                 'url'     => $ret['url'],
2554                                 'nurl'    => Strings::normaliseLink($ret['url']),
2555                                 'addr'    => $ret['addr'],
2556                                 'alias'   => $ret['alias'],
2557                                 'batch'   => $ret['batch'],
2558                                 'notify'  => $ret['notify'],
2559                                 'poll'    => $ret['poll'],
2560                                 'poco'    => $ret['poco'],
2561                                 'name'    => $ret['name'],
2562                                 'nick'    => $ret['nick'],
2563                                 'network' => $ret['network'],
2564                                 'baseurl' => $ret['baseurl'],
2565                                 'gsid'    => $ret['gsid'] ?? null,
2566                                 'protocol' => $protocol,
2567                                 'pubkey'  => $ret['pubkey'],
2568                                 'rel'     => $new_relation,
2569                                 'priority'=> $ret['priority'],
2570                                 'writable'=> $writeable,
2571                                 'hidden'  => $hidden,
2572                                 'blocked' => 0,
2573                                 'readonly'=> 0,
2574                                 'pending' => $pending,
2575                                 'subhub'  => $subhub
2576                         ]);
2577                 }
2578
2579                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $uid]);
2580                 if (!DBA::isResult($contact)) {
2581                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2582                         return $result;
2583                 }
2584
2585                 $contact_id = $contact['id'];
2586                 $result['cid'] = $contact_id;
2587
2588                 Group::addMember(User::getDefaultGroup($uid), $contact_id);
2589
2590                 // Update the avatar
2591                 self::updateAvatar($contact_id, $ret['photo']);
2592
2593                 // pull feed and consume it, which should subscribe to the hub.
2594                 if ($contact['network'] == Protocol::OSTATUS) {
2595                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2596                 }
2597
2598                 if ($probed) {
2599                         self::updateFromProbeArray($contact_id, $ret);
2600                 } else {
2601                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2602                 }
2603
2604                 $result['success'] = Protocol::follow($uid, $contact, $protocol);
2605
2606                 return $result;
2607         }
2608
2609         /**
2610          * @param array  $importer Owner (local user) data
2611          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2612          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2613          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2614          * @param string $note     Introduction additional message
2615          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2616          * @throws HTTPException\InternalServerErrorException
2617          * @throws \ImagickException
2618          */
2619         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2620         {
2621                 // Should always be set
2622                 if (empty($datarray['author-id'])) {
2623                         return false;
2624                 }
2625
2626                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2627                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2628                 if (!DBA::isResult($pub_contact)) {
2629                         // Should never happen
2630                         return false;
2631                 }
2632
2633                 // Contact is blocked at node-level
2634                 if (self::isBlocked($datarray['author-id'])) {
2635                         return false;
2636                 }
2637
2638                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2639                 $name = $pub_contact['name'];
2640                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2641                 $nick = $pub_contact['nick'];
2642                 $network = $pub_contact['network'];
2643
2644                 // Ensure that we don't create a new contact when there already is one
2645                 $cid = self::getIdForURL($url, $importer['uid']);
2646                 if (!empty($cid)) {
2647                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2648                 }
2649
2650                 if (!empty($contact)) {
2651                         if (!empty($contact['pending'])) {
2652                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2653                                 return null;
2654                         }
2655
2656                         // Contact is blocked at user-level
2657                         if (!empty($contact['id']) && !empty($importer['id']) &&
2658                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2659                                 return false;
2660                         }
2661
2662                         // Make sure that the existing contact isn't archived
2663                         self::unmarkForArchival($contact);
2664
2665                         if (($contact['rel'] == self::SHARING)
2666                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2667                                 self::update(['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2668                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2669                         }
2670
2671                         // Ensure to always have the correct network type, independent from the connection request method
2672                         self::updateFromProbe($contact['id']);
2673
2674                         Post\UserNotification::insertNotification($contact['id'], Activity::FOLLOW, $importer['uid']);
2675
2676                         return true;
2677                 } else {
2678                         // send email notification to owner?
2679                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2680                                 Logger::notice('ignoring duplicated connection request from pending contact ' . $url);
2681                                 return null;
2682                         }
2683
2684                         // create contact record
2685                         $contact_id = self::insert([
2686                                 'uid'      => $importer['uid'],
2687                                 'created'  => DateTimeFormat::utcNow(),
2688                                 'url'      => $url,
2689                                 'nurl'     => Strings::normaliseLink($url),
2690                                 'name'     => $name,
2691                                 'nick'     => $nick,
2692                                 'network'  => $network,
2693                                 'rel'      => self::FOLLOWER,
2694                                 'blocked'  => 0,
2695                                 'readonly' => 0,
2696                                 'pending'  => 1,
2697                                 'writable' => 1,
2698                         ]);
2699
2700                         // Ensure to always have the correct network type, independent from the connection request method
2701                         self::updateFromProbe($contact_id);
2702
2703                         self::updateAvatar($contact_id, $photo, true);
2704
2705                         Post\UserNotification::insertNotification($contact_id, Activity::FOLLOW, $importer['uid']);
2706
2707                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2708
2709                         /// @TODO Encapsulate this into a function/method
2710                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2711                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2712                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2713                                 // create notification
2714                                 if (is_array($contact_record)) {
2715                                         $intro = DI::introFactory()->createNew(
2716                                                 $importer['uid'],
2717                                                 $contact_record['id'],
2718                                                 $note
2719                                         );
2720                                         DI::intro()->save($intro);
2721                                 }
2722
2723                                 Group::addMember(User::getDefaultGroup($importer['uid']), $contact_record['id']);
2724
2725                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2726                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2727
2728                                         DI::notify()->createFromArray([
2729                                                 'type'  => Notification\Type::INTRO,
2730                                                 'otype' => Notification\ObjectType::INTRO,
2731                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2732                                                 'uid'   => $user['uid'],
2733                                                 'cid'   => $contact_record['id'],
2734                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2735                                         ]);
2736                                 }
2737                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2738                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2739                                         self::createFromProbeForUser($importer['uid'], $url, $network);
2740                                 }
2741
2742                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2743                                 $fields = ['pending' => false];
2744                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2745                                         $fields['rel'] = self::FRIEND;
2746                                 }
2747
2748                                 self::update($fields, $condition);
2749
2750                                 return true;
2751                         }
2752                 }
2753
2754                 return null;
2755         }
2756
2757         public static function removeFollower(array $contact)
2758         {
2759                 if (in_array($contact['rel'] ?? [], [self::FRIEND, self::SHARING])) {
2760                         self::update(['rel' => self::SHARING], ['id' => $contact['id']]);
2761                 } elseif (!empty($contact['id'])) {
2762                         self::remove($contact['id']);
2763                 } else {
2764                         DI::logger()->info('Couldn\'t remove follower because of invalid contact array', ['contact' => $contact, 'callstack' => System::callstack()]);
2765                 }
2766         }
2767
2768         /**
2769          * Update the local relationship when a local user unfollow a contact.
2770          * Removes the contact for sharing-only protocols (feed and mail).
2771          *
2772          * @param array $contact User-specific contact (uid != 0) array
2773          * @throws HTTPException\InternalServerErrorException
2774          */
2775         public static function removeSharer(array $contact)
2776         {
2777                 if ($contact['rel'] == self::SHARING || in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
2778                         self::remove($contact['id']);
2779                 } else {
2780                         self::update(['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2781                 }
2782         }
2783
2784         /**
2785          * Create a birthday event.
2786          *
2787          * Update the year and the birthday.
2788          */
2789         public static function updateBirthdays()
2790         {
2791                 $condition = [
2792                         '`bd` > ?
2793                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2794                         AND NOT `contact`.`pending`
2795                         AND NOT `contact`.`hidden`
2796                         AND NOT `contact`.`blocked`
2797                         AND NOT `contact`.`archive`
2798                         AND NOT `contact`.`deleted`',
2799                         DBA::NULL_DATE,
2800                         self::SHARING,
2801                         self::FRIEND
2802                 ];
2803
2804                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2805
2806                 while ($contact = DBA::fetch($contacts)) {
2807                         Logger::notice('update_contact_birthday: ' . $contact['bd']);
2808
2809                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2810
2811                         if (Event::createBirthday($contact, $nextbd)) {
2812                                 // update bdyear
2813                                 DBA::update(
2814                                         'contact',
2815                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2816                                         ['id' => $contact['id']]
2817                                 );
2818                         }
2819                 }
2820                 DBA::close($contacts);
2821         }
2822
2823         /**
2824          * Remove the unavailable contact ids from the provided list
2825          *
2826          * @param array $contact_ids Contact id list
2827          * @return array
2828          * @throws \Exception
2829          */
2830         public static function pruneUnavailable(array $contact_ids)
2831         {
2832                 if (empty($contact_ids)) {
2833                         return [];
2834                 }
2835
2836                 $contacts = self::selectToArray(['id'], [
2837                         'id'      => $contact_ids,
2838                         'blocked' => false,
2839                         'pending' => false,
2840                         'archive' => false,
2841                 ]);
2842
2843                 return array_column($contacts, 'id');
2844         }
2845
2846         /**
2847          * Returns a magic link to authenticate remote visitors
2848          *
2849          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2850          *
2851          * @param string $contact_url The address of the target contact profile
2852          * @param string $url         An url that we will be redirected to after the authentication
2853          *
2854          * @return string with "redir" link
2855          * @throws HTTPException\InternalServerErrorException
2856          * @throws \ImagickException
2857          */
2858         public static function magicLink($contact_url, $url = '')
2859         {
2860                 if (!Session::isAuthenticated()) {
2861                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2862                 }
2863
2864                 $contact = self::getByURL($contact_url, false);
2865                 if (empty($contact)) {
2866                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2867                 }
2868
2869                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2870                 unset($contact['uid']);
2871
2872                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2873         }
2874
2875         /**
2876          * Returns a magic link to authenticate remote visitors
2877          *
2878          * @param integer $cid The contact id of the target contact profile
2879          * @param string  $url An url that we will be redirected to after the authentication
2880          *
2881          * @return string with "redir" link
2882          * @throws HTTPException\InternalServerErrorException
2883          * @throws \ImagickException
2884          */
2885         public static function magicLinkById($cid, $url = '')
2886         {
2887                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2888
2889                 return self::magicLinkByContact($contact, $url);
2890         }
2891
2892         /**
2893          * Returns a magic link to authenticate remote visitors
2894          *
2895          * @param array  $contact The contact array with "uid", "network" and "url"
2896          * @param string $url     An url that we will be redirected to after the authentication
2897          *
2898          * @return string with "redir" link
2899          * @throws HTTPException\InternalServerErrorException
2900          * @throws \ImagickException
2901          */
2902         public static function magicLinkByContact($contact, $url = '')
2903         {
2904                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2905
2906                 if (!Session::isAuthenticated()) {
2907                         return $destination;
2908                 }
2909
2910                 // Only redirections to the same host do make sense
2911                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2912                         return $url;
2913                 }
2914
2915                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2916                         return 'contact/' . $contact['id'] . '/conversations';
2917                 }
2918
2919                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2920                         return $destination;
2921                 }
2922
2923                 if (empty($contact['id'])) {
2924                         return $destination;
2925                 }
2926
2927                 $redirect = 'redir/' . $contact['id'];
2928
2929                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2930                         $redirect .= '?url=' . $url;
2931                 }
2932
2933                 return $redirect;
2934         }
2935
2936         /**
2937          * Is the contact a forum?
2938          *
2939          * @param integer $contactid ID of the contact
2940          *
2941          * @return boolean "true" if it is a forum
2942          */
2943         public static function isForum($contactid)
2944         {
2945                 $fields = ['contact-type'];
2946                 $condition = ['id' => $contactid];
2947                 $contact = DBA::selectFirst('contact', $fields, $condition);
2948                 if (!DBA::isResult($contact)) {
2949                         return false;
2950                 }
2951
2952                 // Is it a forum?
2953                 return ($contact['contact-type'] == self::TYPE_COMMUNITY);
2954         }
2955
2956         /**
2957          * Can the remote contact receive private messages?
2958          *
2959          * @param array $contact
2960          * @return bool
2961          */
2962         public static function canReceivePrivateMessages(array $contact)
2963         {
2964                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2965                 $self = $contact['self'] ?? false;
2966
2967                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2968         }
2969
2970         /**
2971          * Search contact table by nick or name
2972          *
2973          * @param string $search Name or nick
2974          * @param string $mode   Search mode (e.g. "community")
2975          * @param int    $uid    User ID
2976          *
2977          * @return array with search results
2978          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2979          */
2980         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2981         {
2982                 if (empty($search)) {
2983                         return [];
2984                 }
2985
2986                 // check supported networks
2987                 $networks = [Protocol::DFRN, Protocol::ACTIVITYPUB];
2988                 if (DI::config()->get('system', 'diaspora_enabled')) {
2989                         $networks[] = Protocol::DIASPORA;
2990                 }
2991
2992                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2993                         $networks[] = Protocol::OSTATUS;
2994                 }
2995
2996                 $condition = ['network' => $networks, 'failed' => false, 'deleted' => false, 'uid' => $uid];
2997
2998                 if ($uid == 0) {
2999                         $condition['blocked'] = false;
3000                 }
3001
3002                 // check if we search only communities or every contact
3003                 if ($mode === 'community') {
3004                         $condition['contact-type'] = self::TYPE_COMMUNITY;
3005                 }
3006
3007                 $search .= '%';
3008
3009                 $condition = DBA::mergeConditions($condition,
3010                         ["(NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` WHERE `publish` OR `net-publish`))
3011                         AND (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?)", $search, $search, $search]);
3012
3013                 $contacts = self::selectToArray([], $condition);
3014                 return $contacts;
3015         }
3016
3017         /**
3018          * Add public contacts from an array
3019          *
3020          * @param array $urls
3021          * @return array result "count", "added" and "updated"
3022          */
3023         public static function addByUrls(array $urls)
3024         {
3025                 $added = 0;
3026                 $updated = 0;
3027                 $unchanged = 0;
3028                 $count = 0;
3029
3030                 foreach ($urls as $url) {
3031                         if (empty($url) || !is_string($url)) {
3032                                 continue;
3033                         }
3034                         $contact = self::getByURL($url, false, ['id', 'updated']);
3035                         if (empty($contact['id'])) {
3036                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3037                                 ++$added;
3038                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3039                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3040                                 ++$updated;
3041                         } else {
3042                                 ++$unchanged;
3043                         }
3044                         ++$count;
3045                 }
3046
3047                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3048         }
3049
3050         /**
3051          * Returns a random, global contact array of the current node
3052          *
3053          * @return array The profile array
3054          * @throws Exception
3055          */
3056         public static function getRandomContact()
3057         {
3058                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3059                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3060                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3061                 ], ['order' => ['RAND()']]);
3062
3063                 if (DBA::isResult($contact)) {
3064                         return $contact;
3065                 }
3066
3067                 return [];
3068         }
3069 }