src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\App\BaseURL;
  25 use Friendica\Content\Pager;
  26 use Friendica\Content\Text\HTML;
  27 use Friendica\Core\Hook;
  28 use Friendica\Core\Logger;
  29 use Friendica\Core\Protocol;
  30 use Friendica\Core\Renderer;
  31 use Friendica\Core\Session;
  32 use Friendica\Core\System;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\Database;
  35 use Friendica\Database\DBA;
  36 use Friendica\DI;
  37 use Friendica\Network\HTTPException;
  38 use Friendica\Network\Probe;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\DFRN;
  42 use Friendica\Protocol\Diaspora;
  43 use Friendica\Protocol\OStatus;
  44 use Friendica\Protocol\Salmon;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50
  51 /**
  52  * functions for interacting with a contact
  53  */
  54 class Contact
  55 {
  56         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          * @deprecated since version 2019.03
  62          * @see User::PAGE_FLAGS_NORMAL
  63          */
  64         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  65         /**
  66          * @deprecated since version 2019.03
  67          * @see User::PAGE_FLAGS_SOAPBOX
  68          */
  69         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  70         /**
  71          * @deprecated since version 2019.03
  72          * @see User::PAGE_FLAGS_COMMUNITY
  73          */
  74         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  75         /**
  76          * @deprecated since version 2019.03
  77          * @see User::PAGE_FLAGS_FREELOVE
  78          */
  79         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  80         /**
  81          * @deprecated since version 2019.03
  82          * @see User::PAGE_FLAGS_BLOG
  83          */
  84         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  85         /**
  86          * @deprecated since version 2019.03
  87          * @see User::PAGE_FLAGS_PRVGROUP
  88          */
  89         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  90         /**
  91          * @}
  92          */
  93
  94         const LOCK_INSERT = 'contact-insert';
  95
  96         /**
  97          * Account types
  98          *
  99          * TYPE_UNKNOWN - unknown type
 100          *
 101          * TYPE_PERSON - the account belongs to a person
 102          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
 103          *
 104          * TYPE_ORGANISATION - the account belongs to an organisation
 105          *      Associated page type: PAGE_SOAPBOX
 106          *
 107          * TYPE_NEWS - the account is a news reflector
 108          *      Associated page type: PAGE_SOAPBOX
 109          *
 110          * TYPE_COMMUNITY - the account is community forum
 111          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 112          *
 113          * TYPE_RELAY - the account is a relay
 114          *      This will only be assigned to contacts, not to user accounts
 115          * @{
 116          */
 117         const TYPE_UNKNOWN =     -1;
 118         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 119         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 120         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 121         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 122         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 123         /**
 124          * @}
 125          */
 126
 127         /**
 128          * Contact_is
 129          *
 130          * Relationship types
 131          * @{
 132          */
 133         const NOTHING  = 0;
 134         const FOLLOWER = 1;
 135         const SHARING  = 2;
 136         const FRIEND   = 3;
 137         /**
 138          * @}
 139          */
 140
 141          const MIRROR_DEACTIVATED = 0;
 142          const MIRROR_FORWARDED = 1;
 143          const MIRROR_OWN_POST = 2;
 144          const MIRROR_NATIVE_RESHARE = 3;
 145
 146          /**
 147          * @param array $fields    Array of selected fields, empty for all
 148          * @param array $condition Array of fields for condition
 149          * @param array $params    Array of several parameters
 150          * @return array
 151          * @throws \Exception
 152          */
 153         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 154         {
 155                 return DBA::selectToArray('contact', $fields, $condition, $params);
 156         }
 157
 158         /**
 159          * @param array $fields    Array of selected fields, empty for all
 160          * @param array $condition Array of fields for condition
 161          * @param array $params    Array of several parameters
 162          * @return array
 163          * @throws \Exception
 164          */
 165         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 166         {
 167                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 168
 169                 return $contact;
 170         }
 171
 172         /**
 173          * Insert a row into the contact table
 174          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 175          *
 176          * @param array $fields         field array
 177          * @param int   $duplicate_mode Do an update on a duplicate entry
 178          *
 179          * @return boolean was the insert successful?
 180          * @throws \Exception
 181          */
 182         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 183         {
 184                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 185                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 186                 }
 187
 188                 if (!empty($fields['url']) && !empty($fields['guid'])) {
 189                         $fields['uri-id'] = ItemURI::insert(['uri' => $fields['url'], 'guid' => $fields['guid']]);
 190                 } elseif (!empty($fields['url'])) {
 191                         $fields['uri-id'] = ItemURI::getIdByURI($fields['url']);
 192                 }
 193
 194                 if (empty($fields['created'])) {
 195                         $fields['created'] = DateTimeFormat::utcNow();
 196                 }
 197
 198                 $ret = DBA::insert('contact', $fields, $duplicate_mode);
 199                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 200                 if (!DBA::isResult($contact)) {
 201                         // Shouldn't happen
 202                         return $ret;
 203                 }
 204
 205                 // Search for duplicated contacts and get rid of them
 206                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 207
 208                 return $ret;
 209         }
 210
 211         /**
 212          * @param integer $id     Contact ID
 213          * @param array   $fields Array of selected fields, empty for all
 214          * @return array|boolean Contact record if it exists, false otherwise
 215          * @throws \Exception
 216          */
 217         public static function getById($id, $fields = [])
 218         {
 219                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 220         }
 221
 222         /**
 223          * Fetches a contact by a given url
 224          *
 225          * @param string  $url    profile url
 226          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 227          * @param array   $fields Field list
 228          * @param integer $uid    User ID of the contact
 229          * @return array contact array
 230          */
 231         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 232         {
 233                 if ($update || is_null($update)) {
 234                         $cid = self::getIdForURL($url, $uid, $update);
 235                         if (empty($cid)) {
 236                                 return [];
 237                         }
 238
 239                         $contact = self::getById($cid, $fields);
 240                         if (empty($contact)) {
 241                                 return [];
 242                         }
 243                         return $contact;
 244                 }
 245
 246                 // Add internal fields
 247                 $removal = [];
 248                 if (!empty($fields)) {
 249                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 250                                 if (!in_array($internal, $fields)) {
 251                                         $fields[] = $internal;
 252                                         $removal[] = $internal;
 253                                 }
 254                         }
 255                 }
 256
 257                 // We first try the nurl (http://server.tld/nick), most common case
 258                 $options = ['order' => ['id']];
 259                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 260
 261                 // Then the addr (nick@server.tld)
 262                 if (!DBA::isResult($contact)) {
 263                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 264                 }
 265
 266                 // Then the alias (which could be anything)
 267                 if (!DBA::isResult($contact)) {
 268                         // The link could be provided as http although we stored it as https
 269                         $ssl_url = str_replace('http://', 'https://', $url);
 270                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 271                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 272                 }
 273
 274                 if (!DBA::isResult($contact)) {
 275                         return [];
 276                 }
 277
 278                 // Update the contact in the background if needed
 279                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 280                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED) && !self::isLocalById($contact['id'])) {
 281                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 282                 }
 283
 284                 // Remove the internal fields
 285                 foreach ($removal as $internal) {
 286                         unset($contact[$internal]);
 287                 }
 288
 289                 return $contact;
 290         }
 291
 292         /**
 293          * Fetches a contact for a given user by a given url.
 294          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 295          *
 296          * @param string  $url    profile url
 297          * @param integer $uid    User ID of the contact
 298          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 299          * @param array   $fields Field list
 300          * @return array contact array
 301          */
 302         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 303         {
 304                 if ($uid != 0) {
 305                         $contact = self::getByURL($url, $update, $fields, $uid);
 306                         if (!empty($contact)) {
 307                                 if (!empty($contact['id'])) {
 308                                         $contact['cid'] = $contact['id'];
 309                                         $contact['zid'] = 0;
 310                                 }
 311                                 return $contact;
 312                         }
 313                 }
 314
 315                 $contact = self::getByURL($url, $update, $fields);
 316                 if (!empty($contact['id'])) {
 317                         $contact['cid'] = 0;
 318                         $contact['zid'] = $contact['id'];
 319                 }
 320                 return $contact;
 321         }
 322
 323         /**
 324          * Tests if the given contact is a follower
 325          *
 326          * @param int $cid Either public contact id or user's contact id
 327          * @param int $uid User ID
 328          *
 329          * @return boolean is the contact id a follower?
 330          * @throws HTTPException\InternalServerErrorException
 331          * @throws \ImagickException
 332          */
 333         public static function isFollower($cid, $uid)
 334         {
 335                 if (Contact\User::isBlocked($cid, $uid)) {
 336                         return false;
 337                 }
 338
 339                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 340                 if (empty($cdata['user'])) {
 341                         return false;
 342                 }
 343
 344                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 345                 return DBA::exists('contact', $condition);
 346         }
 347
 348         /**
 349          * Tests if the given contact url is a follower
 350          *
 351          * @param string $url Contact URL
 352          * @param int    $uid User ID
 353          *
 354          * @return boolean is the contact id a follower?
 355          * @throws HTTPException\InternalServerErrorException
 356          * @throws \ImagickException
 357          */
 358         public static function isFollowerByURL($url, $uid)
 359         {
 360                 $cid = self::getIdForURL($url, $uid);
 361
 362                 if (empty($cid)) {
 363                         return false;
 364                 }
 365
 366                 return self::isFollower($cid, $uid);
 367         }
 368
 369         /**
 370          * Tests if the given user follow the given contact
 371          *
 372          * @param int $cid Either public contact id or user's contact id
 373          * @param int $uid User ID
 374          *
 375          * @return boolean is the contact url being followed?
 376          * @throws HTTPException\InternalServerErrorException
 377          * @throws \ImagickException
 378          */
 379         public static function isSharing($cid, $uid)
 380         {
 381                 if (Contact\User::isBlocked($cid, $uid)) {
 382                         return false;
 383                 }
 384
 385                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 386                 if (empty($cdata['user'])) {
 387                         return false;
 388                 }
 389
 390                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 391                 return DBA::exists('contact', $condition);
 392         }
 393
 394         /**
 395          * Tests if the given user follow the given contact url
 396          *
 397          * @param string $url Contact URL
 398          * @param int    $uid User ID
 399          *
 400          * @return boolean is the contact url being followed?
 401          * @throws HTTPException\InternalServerErrorException
 402          * @throws \ImagickException
 403          */
 404         public static function isSharingByURL($url, $uid)
 405         {
 406                 $cid = self::getIdForURL($url, $uid);
 407
 408                 if (empty($cid)) {
 409                         return false;
 410                 }
 411
 412                 return self::isSharing($cid, $uid);
 413         }
 414
 415         /**
 416          * Get the basepath for a given contact link
 417          *
 418          * @param string $url The contact link
 419          * @param boolean $dont_update Don't update the contact
 420          *
 421          * @return string basepath
 422          * @throws HTTPException\InternalServerErrorException
 423          * @throws \ImagickException
 424          */
 425         public static function getBasepath($url, $dont_update = false)
 426         {
 427                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 428                 if (!DBA::isResult($contact)) {
 429                         return '';
 430                 }
 431
 432                 if (!empty($contact['baseurl'])) {
 433                         return $contact['baseurl'];
 434                 } elseif ($dont_update) {
 435                         return '';
 436                 }
 437
 438                 // Update the existing contact
 439                 self::updateFromProbe($contact['id']);
 440
 441                 // And fetch the result
 442                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 443                 if (empty($contact['baseurl'])) {
 444                         Logger::info('No baseurl for contact', ['url' => $url]);
 445                         return '';
 446                 }
 447
 448                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 449                 return $contact['baseurl'];
 450         }
 451
 452         /**
 453          * Check if the given contact url is on the same server
 454          *
 455          * @param string $url The contact link
 456          *
 457          * @return boolean Is it the same server?
 458          */
 459         public static function isLocal($url)
 460         {
 461                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 462         }
 463
 464         /**
 465          * Check if the given contact ID is on the same server
 466          *
 467          * @param string $url The contact link
 468          *
 469          * @return boolean Is it the same server?
 470          */
 471         public static function isLocalById(int $cid)
 472         {
 473                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 474                 if (!DBA::isResult($contact)) {
 475                         return false;
 476                 }
 477
 478                 if (empty($contact['baseurl'])) {
 479                         $baseurl = self::getBasepath($contact['url'], true);
 480                 } else {
 481                         $baseurl = $contact['baseurl'];
 482                 }
 483
 484                 return Strings::compareLink($baseurl, DI::baseUrl());
 485         }
 486
 487         /**
 488          * Returns the public contact id of the given user id
 489          *
 490          * @param  integer $uid User ID
 491          *
 492          * @return integer|boolean Public contact id for given user id
 493          * @throws \Exception
 494          */
 495         public static function getPublicIdByUserId($uid)
 496         {
 497                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 498                 if (!DBA::isResult($self)) {
 499                         return false;
 500                 }
 501                 return self::getIdForURL($self['url']);
 502         }
 503
 504         /**
 505          * Returns the contact id for the user and the public contact id for a given contact id
 506          *
 507          * @param int $cid Either public contact id or user's contact id
 508          * @param int $uid User ID
 509          *
 510          * @return array with public and user's contact id
 511          * @throws HTTPException\InternalServerErrorException
 512          * @throws \ImagickException
 513          */
 514         public static function getPublicAndUserContacID($cid, $uid)
 515         {
 516                 if (empty($uid) || empty($cid)) {
 517                         return [];
 518                 }
 519
 520                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 521                 if (!DBA::isResult($contact)) {
 522                         return [];
 523                 }
 524
 525                 // We quit when the user id don't match the user id of the provided contact
 526                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 527                         return [];
 528                 }
 529
 530                 if ($contact['uid'] != 0) {
 531                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 532                         if (empty($pcid)) {
 533                                 return [];
 534                         }
 535                         $ucid = $contact['id'];
 536                 } else {
 537                         $pcid = $contact['id'];
 538                         $ucid = self::getIdForURL($contact['url'], $uid);
 539                 }
 540
 541                 return ['public' => $pcid, 'user' => $ucid];
 542         }
 543
 544         /**
 545          * Returns contact details for a given contact id in combination with a user id
 546          *
 547          * @param int $cid A contact ID
 548          * @param int $uid The User ID
 549          * @param array $fields The selected fields for the contact
 550          *
 551          * @return array The contact details
 552          *
 553          * @throws \Exception
 554          */
 555         public static function getContactForUser($cid, $uid, array $fields = [])
 556         {
 557                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 558
 559                 if (!DBA::isResult($contact)) {
 560                         return [];
 561                 } else {
 562                         return $contact;
 563                 }
 564         }
 565
 566         /**
 567          * Creates the self-contact for the provided user id
 568          *
 569          * @param int $uid
 570          * @return bool Operation success
 571          * @throws HTTPException\InternalServerErrorException
 572          */
 573         public static function createSelfFromUserId($uid)
 574         {
 575                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 576                         ['uid' => $uid, 'account_expired' => false]);
 577                 if (!DBA::isResult($user)) {
 578                         return false;
 579                 }
 580
 581                 $contact = [
 582                         'uid'         => $user['uid'],
 583                         'created'     => DateTimeFormat::utcNow(),
 584                         'self'        => 1,
 585                         'name'        => $user['username'],
 586                         'nick'        => $user['nickname'],
 587                         'pubkey'      => $user['pubkey'],
 588                         'prvkey'      => $user['prvkey'],
 589                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 590                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 591                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 592                         'blocked'     => 0,
 593                         'pending'     => 0,
 594                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 595                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 596                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 597                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 598                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 599                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 600                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 601                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 602                         'name-date'   => DateTimeFormat::utcNow(),
 603                         'uri-date'    => DateTimeFormat::utcNow(),
 604                         'avatar-date' => DateTimeFormat::utcNow(),
 605                         'closeness'   => 0
 606                 ];
 607
 608                 $return = true;
 609
 610                 // Only create the entry if it doesn't exist yet
 611                 if (!DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 612                         $return = DBA::insert('contact', $contact);
 613                 }
 614
 615                 // Create the public contact
 616                 if (!DBA::exists('contact', ['nurl' => $contact['nurl'], 'uid' => 0])) {
 617                         $contact['self']   = false;
 618                         $contact['uid']    = 0;
 619                         $contact['prvkey'] = null;
 620
 621                         DBA::insert('contact', $contact, Database::INSERT_IGNORE);
 622                 }
 623
 624                 return $return;
 625         }
 626
 627         /**
 628          * Updates the self-contact for the provided user id
 629          *
 630          * @param int     $uid
 631          * @param boolean $update_avatar Force the avatar update
 632          * @return bool   "true" if updated
 633          * @throws HTTPException\InternalServerErrorException
 634          */
 635         public static function updateSelfFromUserID($uid, $update_avatar = false)
 636         {
 637                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 638                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 639                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco', 'network'];
 640                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 641                 if (!DBA::isResult($self)) {
 642                         return false;
 643                 }
 644
 645                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 646                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 647                 if (!DBA::isResult($user)) {
 648                         return false;
 649                 }
 650
 651                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 652                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 653                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 654                 if (!DBA::isResult($profile)) {
 655                         return false;
 656                 }
 657
 658                 $file_suffix = 'jpg';
 659
 660                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 661                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 662                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 663                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 664                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp'], 'network' => Protocol::DFRN];
 665
 666                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 667                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 668                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 669                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 670                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 671                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 672                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 673                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 674                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 675
 676                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 677                 if (DBA::isResult($avatar)) {
 678                         if ($update_avatar) {
 679                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 680                         }
 681
 682                         // Creating the path to the avatar, beginning with the file suffix
 683                         $types = Images::supportedTypes();
 684                         if (isset($types[$avatar['type']])) {
 685                                 $file_suffix = $types[$avatar['type']];
 686                         }
 687
 688                         // We are adding a timestamp value so that other systems won't use cached content
 689                         $timestamp = strtotime($fields['avatar-date']);
 690
 691                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 692                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 693
 694                         $fields['photo'] = $prefix . '4' . $suffix;
 695                         $fields['thumb'] = $prefix . '5' . $suffix;
 696                         $fields['micro'] = $prefix . '6' . $suffix;
 697                 } else {
 698                         // We hadn't found a photo entry, so we use the default avatar
 699                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 700                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 701                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 702                 }
 703
 704                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 705                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 706                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 707                 $fields['unsearchable'] = !$profile['net-publish'];
 708
 709                 $update = false;
 710
 711                 foreach ($fields as $field => $content) {
 712                         if ($self[$field] != $content) {
 713                                 $update = true;
 714                         }
 715                 }
 716
 717                 if ($update) {
 718                         if ($fields['name'] != $self['name']) {
 719                                 $fields['name-date'] = DateTimeFormat::utcNow();
 720                         }
 721                         $fields['updated'] = DateTimeFormat::utcNow();
 722                         DBA::update('contact', $fields, ['id' => $self['id']]);
 723
 724                         // Update the public contact as well
 725                         $fields['prvkey'] = null;
 726                         $fields['self']   = false;
 727                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 728
 729                         // Update the profile
 730                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 731                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 732                         DBA::update('profile', $fields, ['uid' => $uid]);
 733                 }
 734
 735                 return $update;
 736         }
 737
 738         /**
 739          * Marks a contact for removal
 740          *
 741          * @param int $id contact id
 742          * @return null
 743          * @throws HTTPException\InternalServerErrorException
 744          */
 745         public static function remove($id)
 746         {
 747                 // We want just to make sure that we don't delete our "self" contact
 748                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 749                 if (!DBA::isResult($contact)) {
 750                         return;
 751                 }
 752
 753                 // Archive the contact
 754                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 755
 756                 // Delete it in the background
 757                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 758         }
 759
 760         /**
 761          * Sends an unfriend message. Does not remove the contact
 762          *
 763          * @param array   $user     User unfriending
 764          * @param array   $contact  Contact unfriended
 765          * @param boolean $dissolve Remove the contact on the remote side
 766          * @return void
 767          * @throws HTTPException\InternalServerErrorException
 768          * @throws \ImagickException
 769          */
 770         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 771         {
 772                 if (empty($contact['network'])) {
 773                         return;
 774                 }
 775
 776                 $protocol = $contact['network'];
 777                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 778                         $protocol = Protocol::ACTIVITYPUB;
 779                 }
 780
 781                 if (($protocol == Protocol::DFRN) && $dissolve) {
 782                         DFRN::deliver($user, $contact, 'placeholder', true);
 783                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 784                         // create an unfollow slap
 785                         $item = [];
 786                         $item['verb'] = Activity::O_UNFOLLOW;
 787                         $item['gravity'] = GRAVITY_ACTIVITY;
 788                         $item['follow'] = $contact["url"];
 789                         $item['body'] = '';
 790                         $item['title'] = '';
 791                         $item['guid'] = '';
 792                         $item['uri-id'] = 0;
 793                         $slap = OStatus::salmon($item, $user);
 794
 795                         if (!empty($contact['notify'])) {
 796                                 Salmon::slapper($user, $contact['notify'], $slap);
 797                         }
 798                 } elseif ($protocol == Protocol::DIASPORA) {
 799                         Diaspora::sendUnshare($user, $contact);
 800                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 801                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 802
 803                         if ($dissolve) {
 804                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 805                         }
 806                 }
 807         }
 808
 809         /**
 810          * Marks a contact for archival after a communication issue delay
 811          *
 812          * Contact has refused to recognise us as a friend. We will start a countdown.
 813          * If they still don't recognise us in 32 days, the relationship is over,
 814          * and we won't waste any more time trying to communicate with them.
 815          * This provides for the possibility that their database is temporarily messed
 816          * up or some other transient event and that there's a possibility we could recover from it.
 817          *
 818          * @param array $contact contact to mark for archival
 819          * @return null
 820          * @throws HTTPException\InternalServerErrorException
 821          */
 822         public static function markForArchival(array $contact)
 823         {
 824                 if (!isset($contact['url']) && !empty($contact['id'])) {
 825                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 826                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 827                         if (!DBA::isResult($contact)) {
 828                                 return;
 829                         }
 830                 } elseif (!isset($contact['url'])) {
 831                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 832                 }
 833
 834                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 835
 836                 // Contact already archived or "self" contact? => nothing to do
 837                 if ($contact['archive'] || $contact['self']) {
 838                         return;
 839                 }
 840
 841                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 842                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 843                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 844                 } else {
 845                         /* @todo
 846                          * We really should send a notification to the owner after 2-3 weeks
 847                          * so they won't be surprised when the contact vanishes and can take
 848                          * remedial action if this was a serious mistake or glitch
 849                          */
 850
 851                         /// @todo Check for contact vitality via probing
 852                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 853
 854                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 855                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 856                                 /* Relationship is really truly dead. archive them rather than
 857                                  * delete, though if the owner tries to unarchive them we'll start
 858                                  * the whole process over again.
 859                                  */
 860                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 861                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 862                         }
 863                 }
 864         }
 865
 866         /**
 867          * Cancels the archival countdown
 868          *
 869          * @see   Contact::markForArchival()
 870          *
 871          * @param array $contact contact to be unmarked for archival
 872          * @return null
 873          * @throws \Exception
 874          */
 875         public static function unmarkForArchival(array $contact)
 876         {
 877                 // Always unarchive the relay contact entry
 878                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 879                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 880                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 881                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 882                                 DBA::update('contact', $fields, $condition);
 883                         }
 884                 }
 885
 886                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 887                 $exists = DBA::exists('contact', $condition);
 888
 889                 // We don't need to update, we never marked this contact for archival
 890                 if (!$exists) {
 891                         return;
 892                 }
 893
 894                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 895
 896                 if (!isset($contact['url']) && !empty($contact['id'])) {
 897                         $fields = ['id', 'url', 'batch'];
 898                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 899                         if (!DBA::isResult($contact)) {
 900                                 return;
 901                         }
 902                 }
 903
 904                 // It's a miracle. Our dead contact has inexplicably come back to life.
 905                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 906                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 907                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 908         }
 909
 910         /**
 911          * Returns the data array for the photo menu of a given contact
 912          *
 913          * @param array $contact contact
 914          * @param int   $uid     optional, default 0
 915          * @return array
 916          * @throws HTTPException\InternalServerErrorException
 917          * @throws \ImagickException
 918          */
 919         public static function photoMenu(array $contact, $uid = 0)
 920         {
 921                 $pm_url = '';
 922                 $status_link = '';
 923                 $photos_link = '';
 924                 $contact_drop_link = '';
 925                 $poke_link = '';
 926
 927                 if ($uid == 0) {
 928                         $uid = local_user();
 929                 }
 930
 931                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 932                         if ($uid == 0) {
 933                                 $profile_link = self::magicLinkByContact($contact);
 934                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 935
 936                                 return $menu;
 937                         }
 938
 939                         // Look for our own contact if the uid doesn't match and isn't public
 940                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 941                         if (DBA::isResult($contact_own)) {
 942                                 return self::photoMenu($contact_own, $uid);
 943                         }
 944                 }
 945
 946                 $sparkle = false;
 947                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 948                         $sparkle = true;
 949                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 950                 } else {
 951                         $profile_link = $contact['url'];
 952                 }
 953
 954                 if ($profile_link === 'mailbox') {
 955                         $profile_link = '';
 956                 }
 957
 958                 if ($sparkle) {
 959                         $status_link = $profile_link . '/status';
 960                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 961                         $profile_link = $profile_link . '/profile';
 962                 }
 963
 964                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 965                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 966                 }
 967
 968                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 969                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 970                 }
 971
 972                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 973
 974                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 975
 976                 if (!$contact['self']) {
 977                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 978                 }
 979
 980                 $follow_link = '';
 981                 $unfollow_link = '';
 982                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 983                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 984                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
 985                         } elseif(!$contact['pending']) {
 986                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
 987                         }
 988                 }
 989
 990                 if (!empty($follow_link) || !empty($unfollow_link)) {
 991                         $contact_drop_link = '';
 992                 }
 993
 994                 /**
 995                  * Menu array:
 996                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 997                  */
 998                 if (empty($contact['uid'])) {
 999                         $menu = [
1000                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1001                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1002                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1003                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1004                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1005                         ];
1006                 } else {
1007                         $menu = [
1008                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1009                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1010                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1011                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1012                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1013                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1014                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1015                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1016                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1017                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1018                         ];
1019
1020                         if (!empty($contact['pending'])) {
1021                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1022                                 if (DBA::isResult($intro)) {
1023                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1024                                 }
1025                         }
1026                 }
1027
1028                 $args = ['contact' => $contact, 'menu' => &$menu];
1029
1030                 Hook::callAll('contact_photo_menu', $args);
1031
1032                 $menucondensed = [];
1033
1034                 foreach ($menu as $menuname => $menuitem) {
1035                         if ($menuitem[1] != '') {
1036                                 $menucondensed[$menuname] = $menuitem;
1037                         }
1038                 }
1039
1040                 return $menucondensed;
1041         }
1042
1043         /**
1044          * Fetch the contact id for a given URL and user
1045          *
1046          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1047          * `addr` or `alias`.
1048          *
1049          * If there's no record and we aren't looking for a public contact, we quit.
1050          * If there's one, we check that it isn't time to update the picture else we
1051          * directly return the found contact id.
1052          *
1053          * Second, we probe the provided $url whether it's http://server.tld/profile or
1054          * nick@server.tld. We quit if we can't get any info back.
1055          *
1056          * Third, we create the contact record if it doesn't exist
1057          *
1058          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1059          * if there's any updates
1060          *
1061          * @param string  $url       Contact URL
1062          * @param integer $uid       The user id for the contact (0 = public contact)
1063          * @param boolean $update    true = always update, false = never update, null = update when not found
1064          * @param array   $default   Default value for creating the contact when everything else fails
1065          *
1066          * @return integer Contact ID
1067          * @throws HTTPException\InternalServerErrorException
1068          * @throws \ImagickException
1069          */
1070         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1071         {
1072                 $contact_id = 0;
1073
1074                 if ($url == '') {
1075                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1076                         return 0;
1077                 }
1078
1079                 $contact = self::getByURL($url, false, ['id', 'network'], $uid);
1080
1081                 if (!empty($contact)) {
1082                         $contact_id = $contact["id"];
1083
1084                         if (empty($update)) {
1085                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1086                                 return $contact_id;
1087                         }
1088                 } elseif ($uid != 0) {
1089                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1090                         return 0;
1091                 } elseif (empty($default) && !is_null($update) && !$update) {
1092                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1093                         return 0;
1094                 }
1095
1096                 $data = [];
1097
1098                 if (empty($default['network']) || $update) {
1099                         $data = Probe::uri($url, "", $uid);
1100
1101                         // Take the default values when probing failed
1102                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1103                                 $data = array_merge($data, $default);
1104                         }
1105                 } elseif (!empty($default['network'])) {
1106                         $data = $default;
1107                 }
1108
1109                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1110                         // Fetch data for the public contact via the first found personal contact
1111                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1112                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'header', 'contact-type',
1113                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1114                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1115
1116                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1117                         if (!DBA::isResult($personal_contact)) {
1118                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1119                         }
1120
1121                         if (DBA::isResult($personal_contact)) {
1122                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1123                                 $data = $personal_contact;
1124                                 $data['photo'] = $personal_contact['avatar'];
1125                                 $data['account-type'] = $personal_contact['contact-type'];
1126                                 $data['hide'] = $personal_contact['unsearchable'];
1127                                 unset($data['avatar']);
1128                                 unset($data['contact-type']);
1129                                 unset($data['unsearchable']);
1130                         }
1131                 }
1132
1133                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1134                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1135                         return 0;
1136                 }
1137
1138                 if (!$contact_id) {
1139                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1140                         if (!empty($data['alias'])) {
1141                                 $urls[] = Strings::normaliseLink($data['alias']);
1142                         }
1143                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1144                         if (!empty($contact['id'])) {
1145                                 $contact_id = $contact['id'];
1146                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1147                         }
1148                 }
1149
1150                 if (!$contact_id) {
1151                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1152                         $fields = [
1153                                 'uid'       => $uid,
1154                                 'url'       => $data['url'],
1155                                 'nurl'      => Strings::normaliseLink($data['url']),
1156                                 'network'   => $data['network'],
1157                                 'created'   => DateTimeFormat::utcNow(),
1158                                 'rel'       => self::SHARING,
1159                                 'writable'  => 1,
1160                                 'blocked'   => 0,
1161                                 'readonly'  => 0,
1162                                 'pending'   => 0];
1163
1164                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1165
1166                         // Before inserting we do check if the entry does exist now.
1167                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1168                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1169                                 if (DBA::isResult($contact)) {
1170                                         $contact_id = $contact['id'];
1171                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1172                                 } else {
1173                                         DBA::insert('contact', $fields);
1174                                         $contact_id = DBA::lastInsertId();
1175                                         if ($contact_id) {
1176                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1177                                         }
1178                                 }
1179                                 DI::lock()->release(self::LOCK_INSERT);
1180                         } else {
1181                                 Logger::warning('Contact lock had not been acquired');
1182                         }
1183
1184                         if (!$contact_id) {
1185                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1186                                 return 0;
1187                         }
1188                 } else {
1189                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1190                 }
1191
1192                 self::updateFromProbeArray($contact_id, $data);
1193
1194                 // Don't return a number for a deleted account
1195                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1196                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1197                         return 0;
1198                 }
1199
1200                 return $contact_id;
1201         }
1202
1203         /**
1204          * Checks if the contact is archived
1205          *
1206          * @param int $cid contact id
1207          *
1208          * @return boolean Is the contact archived?
1209          * @throws HTTPException\InternalServerErrorException
1210          */
1211         public static function isArchived(int $cid)
1212         {
1213                 if ($cid == 0) {
1214                         return false;
1215                 }
1216
1217                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1218                 if (!DBA::isResult($contact)) {
1219                         return false;
1220                 }
1221
1222                 if ($contact['archive']) {
1223                         return true;
1224                 }
1225
1226                 // Check status of ActivityPub endpoints
1227                 $apcontact = APContact::getByURL($contact['url'], false);
1228                 if (!empty($apcontact)) {
1229                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1230                                 return true;
1231                         }
1232
1233                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1234                                 return true;
1235                         }
1236                 }
1237
1238                 // Check status of Diaspora endpoints
1239                 if (!empty($contact['batch'])) {
1240                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1241                         return DBA::exists('contact', $condition);
1242                 }
1243
1244                 return false;
1245         }
1246
1247         /**
1248          * Checks if the contact is blocked
1249          *
1250          * @param int $cid contact id
1251          *
1252          * @return boolean Is the contact blocked?
1253          * @throws HTTPException\InternalServerErrorException
1254          */
1255         public static function isBlocked($cid)
1256         {
1257                 if ($cid == 0) {
1258                         return false;
1259                 }
1260
1261                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1262                 if (!DBA::isResult($blocked)) {
1263                         return false;
1264                 }
1265
1266                 if (Network::isUrlBlocked($blocked['url'])) {
1267                         return true;
1268                 }
1269
1270                 return (bool) $blocked['blocked'];
1271         }
1272
1273         /**
1274          * Checks if the contact is hidden
1275          *
1276          * @param int $cid contact id
1277          *
1278          * @return boolean Is the contact hidden?
1279          * @throws \Exception
1280          */
1281         public static function isHidden($cid)
1282         {
1283                 if ($cid == 0) {
1284                         return false;
1285                 }
1286
1287                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1288                 if (!DBA::isResult($hidden)) {
1289                         return false;
1290                 }
1291                 return (bool) $hidden['hidden'];
1292         }
1293
1294         /**
1295          * Returns posts from a given contact url
1296          *
1297          * @param string $contact_url Contact URL
1298          * @param bool   $thread_mode
1299          * @param int    $update      Update mode
1300          * @param int    $parent      Item parent ID for the update mode
1301          * @return string posts in HTML
1302          * @throws \Exception
1303          */
1304         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1305         {
1306                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1307         }
1308
1309         /**
1310          * Returns posts from a given contact id
1311          *
1312          * @param int  $cid         Contact ID
1313          * @param bool $thread_mode
1314          * @param int  $update      Update mode
1315          * @param int  $parent     Item parent ID for the update mode
1316          * @return string posts in HTML
1317          * @throws \Exception
1318          */
1319         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1320         {
1321                 $a = DI::app();
1322
1323                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1324                 if (!DBA::isResult($contact)) {
1325                         return '';
1326                 }
1327
1328                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1329                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1330                 } else {
1331                         $sql = "`uid` = ?";
1332                 }
1333
1334                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1335
1336                 if ($thread_mode) {
1337                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1338                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1339                 } else {
1340                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1341                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1342                 }
1343
1344                 if (!empty($parent)) {
1345                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1346                 } else {
1347                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1348                         if (!empty($last_received)) {
1349                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1350                         }
1351                 }
1352
1353                 if (DI::mode()->isMobile()) {
1354                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1355                                 DI::config()->get('system', 'itemspage_network_mobile'));
1356                 } else {
1357                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1358                                 DI::config()->get('system', 'itemspage_network'));
1359                 }
1360
1361                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1362
1363                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1364
1365                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1366                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1367                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1368                 } else {
1369                         $o = '';
1370                 }
1371
1372                 if ($thread_mode) {
1373                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1374
1375                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1376                 } else {
1377                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1378
1379                         $o .= conversation($a, $items, 'contact-posts', $update);
1380                 }
1381
1382                 if (!$update) {
1383                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1384                                 $o .= HTML::scrollLoader();
1385                         } else {
1386                                 $o .= $pager->renderMinimal(count($items));
1387                         }
1388                 }
1389
1390                 return $o;
1391         }
1392
1393         /**
1394          * Returns the account type name
1395          *
1396          * The function can be called with either the user or the contact array
1397          *
1398          * @param array $contact contact or user array
1399          * @return string
1400          */
1401         public static function getAccountType(array $contact)
1402         {
1403                 // There are several fields that indicate that the contact or user is a forum
1404                 // "page-flags" is a field in the user table,
1405                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1406                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1407                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1408                         || (isset($contact['forum']) && intval($contact['forum']))
1409                         || (isset($contact['prv']) && intval($contact['prv']))
1410                         || (isset($contact['community']) && intval($contact['community']))
1411                 ) {
1412                         $type = self::TYPE_COMMUNITY;
1413                 } else {
1414                         $type = self::TYPE_PERSON;
1415                 }
1416
1417                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1418                 if (isset($contact["contact-type"])) {
1419                         $type = $contact["contact-type"];
1420                 }
1421
1422                 if (isset($contact["account-type"])) {
1423                         $type = $contact["account-type"];
1424                 }
1425
1426                 switch ($type) {
1427                         case self::TYPE_ORGANISATION:
1428                                 $account_type = DI::l10n()->t("Organisation");
1429                                 break;
1430
1431                         case self::TYPE_NEWS:
1432                                 $account_type = DI::l10n()->t('News');
1433                                 break;
1434
1435                         case self::TYPE_COMMUNITY:
1436                                 $account_type = DI::l10n()->t("Forum");
1437                                 break;
1438
1439                         default:
1440                                 $account_type = "";
1441                                 break;
1442                 }
1443
1444                 return $account_type;
1445         }
1446
1447         /**
1448          * Blocks a contact
1449          *
1450          * @param int $cid
1451          * @return bool
1452          * @throws \Exception
1453          */
1454         public static function block($cid, $reason = null)
1455         {
1456                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1457
1458                 return $return;
1459         }
1460
1461         /**
1462          * Unblocks a contact
1463          *
1464          * @param int $cid
1465          * @return bool
1466          * @throws \Exception
1467          */
1468         public static function unblock($cid)
1469         {
1470                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1471
1472                 return $return;
1473         }
1474
1475         /**
1476          * Ensure that cached avatar exist
1477          *
1478          * @param integer $cid
1479          */
1480         public static function checkAvatarCache(int $cid)
1481         {
1482                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1483                 if (!DBA::isResult($contact)) {
1484                         return;
1485                 }
1486
1487                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1488                         return;
1489                 }
1490
1491                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1492
1493                 self::updateAvatar($cid, $contact['avatar'], true);
1494         }
1495
1496         /**
1497          * Return the photo path for a given contact array in the given size
1498          *
1499          * @param array $contact    contact array
1500          * @param string $field     Fieldname of the photo in the contact array
1501          * @param string $size      Size of the avatar picture
1502          * @param string $avatar    Avatar path that is displayed when no photo had been found
1503          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1504          * @return string photo path
1505          */
1506         private static function getAvatarPath(array $contact, string $size, $no_update = false)
1507         {
1508                 $contact = self::checkAvatarCacheByArray($contact, $no_update);
1509                 return self::getAvatarUrlForId($contact['id'], $size, $contact['updated'] ?? '');
1510         }
1511
1512         /**
1513          * Return the photo path for a given contact array
1514          *
1515          * @param array  $contact   Contact array
1516          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1517          * @return string photo path
1518          */
1519         public static function getPhoto(array $contact, bool $no_update = false)
1520         {
1521                 return self::getAvatarPath($contact, Proxy::SIZE_SMALL, $no_update);
1522         }
1523
1524         /**
1525          * Return the photo path (thumb size) for a given contact array
1526          *
1527          * @param array  $contact   Contact array
1528          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1529          * @return string photo path
1530          */
1531         public static function getThumb(array $contact, bool $no_update = false)
1532         {
1533                 return self::getAvatarPath($contact, Proxy::SIZE_THUMB, $no_update);
1534         }
1535
1536         /**
1537          * Return the photo path (micro size) for a given contact array
1538          *
1539          * @param array  $contact   Contact array
1540          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1541          * @return string photo path
1542          */
1543         public static function getMicro(array $contact, bool $no_update = false)
1544         {
1545                 return self::getAvatarPath($contact, Proxy::SIZE_MICRO, $no_update);
1546         }
1547
1548         /**
1549          * Check the given contact array for avatar cache fields
1550          *
1551          * @param array $contact
1552          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1553          * @return array contact array with avatar cache fields
1554          */
1555         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1556         {
1557                 $update = false;
1558                 $contact_fields = [];
1559                 $fields = ['photo', 'thumb', 'micro'];
1560                 foreach ($fields as $field) {
1561                         if (isset($contact[$field])) {
1562                                 $contact_fields[] = $field;
1563                         }
1564                         if (isset($contact[$field]) && empty($contact[$field])) {
1565                                 $update = true;
1566                         }
1567                 }
1568
1569                 if (!$update || $no_update) {
1570                         return $contact;
1571                 }
1572
1573                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1574                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1575
1576                         $new_contact = self::getById($contact['id'], $contact_fields);
1577                         if (DBA::isResult($new_contact)) {
1578                                 // We only update the cache fields
1579                                 $contact = array_merge($contact, $new_contact);
1580                         }
1581                 }
1582
1583                 /// add the default avatars if the fields aren't filled
1584                 if (isset($contact['photo']) && empty($contact['photo'])) {
1585                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1586                 }
1587                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1588                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1589                 }
1590                 if (isset($contact['micro']) && empty($contact['micro'])) {
1591                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1592                 }
1593
1594                 return $contact;
1595         }
1596
1597         /**
1598          * Fetch the default avatar for the given contact and size
1599          *
1600          * @param array $contact  contact array
1601          * @param string $size    Size of the avatar picture
1602          * @return string avatar URL
1603          */
1604         public static function getDefaultAvatar(array $contact, string $size)
1605         {
1606                 switch ($size) {
1607                         case Proxy::SIZE_MICRO:
1608                                 $avatar['size'] = 48;
1609                                 $default = self::DEFAULT_AVATAR_MICRO;
1610                                 break;
1611
1612                         case Proxy::SIZE_THUMB:
1613                                 $avatar['size'] = 80;
1614                                 $default = self::DEFAULT_AVATAR_THUMB;
1615                                 break;
1616
1617                         case Proxy::SIZE_SMALL:
1618                         default:
1619                                 $avatar['size'] = 300;
1620                                 $default = self::DEFAULT_AVATAR_PHOTO;
1621                                 break;
1622                 }
1623
1624                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1625                         return DI::baseUrl() . $default;
1626                 }
1627
1628                 if (!empty($contact['xmpp'])) {
1629                         $avatar['email'] = $contact['xmpp'];
1630                 } elseif (!empty($contact['addr'])) {
1631                         $avatar['email'] = $contact['addr'];
1632                 } elseif (!empty($contact['url'])) {
1633                         $avatar['email'] = $contact['url'];
1634                 } else {
1635                         return DI::baseUrl() . $default;
1636                 }
1637
1638                 $avatar['url'] = '';
1639                 $avatar['success'] = false;
1640
1641                 Hook::callAll('avatar_lookup', $avatar);
1642
1643                 if ($avatar['success'] && !empty($avatar['url'])) {
1644                         return $avatar['url'];
1645                 }
1646
1647                 return DI::baseUrl() . $default;
1648         }
1649
1650         /**
1651          * Get avatar link for given contact id
1652          *
1653          * @param integer $cid     contact id
1654          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1655          * @param string  $updated Contact update date
1656          * @return string avatar link
1657          */
1658         public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = ''):string
1659         {
1660                 // We have to fetch the "updated" variable when it wasn't provided
1661                 // The parameter can be provided to improve performance
1662                 if (empty($updated)) {
1663                         $contact = self::getById($cid, ['updated']);
1664                         $updated = $contact['updated'] ?? '';
1665                 }
1666
1667                 $url = DI::baseUrl() . '/photo/contact/';
1668                 switch ($size) {
1669                         case Proxy::SIZE_MICRO:
1670                                 $url .= Proxy::PIXEL_MICRO . '/';
1671                                 break;
1672                         case Proxy::SIZE_THUMB:
1673                                 $url .= Proxy::PIXEL_THUMB . '/';
1674                                 break;
1675                         case Proxy::SIZE_SMALL:
1676                                 $url .= Proxy::PIXEL_SMALL . '/';
1677                                 break;
1678                         case Proxy::SIZE_MEDIUM:
1679                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1680                                 break;
1681                         case Proxy::SIZE_LARGE:
1682                                 $url .= Proxy::PIXEL_LARGE . '/';
1683                                 break;
1684                 }
1685                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1686         }
1687
1688         /**
1689          * Get avatar link for given contact URL
1690          *
1691          * @param string  $url  contact url
1692          * @param integer $uid  user id
1693          * @param string  $size One of the ProxyUtils::SIZE_* constants
1694          * @return string avatar link
1695          */
1696         public static function getAvatarUrlForUrl(string $url, int $uid, string $size = ''):string
1697         {
1698                 $condition = ["`nurl` = ? AND ((`uid` = ? AND `network` IN (?, ?)) OR `uid` = ?)",
1699                         Strings::normaliseLink($url), $uid, Protocol::FEED, Protocol::MAIL, 0];
1700                 $contact = self::selectFirst(['id', 'updated'], $condition);
1701                 return self::getAvatarUrlForId($contact['id'] ?? 0, $size, $contact['updated'] ?? '');
1702         }
1703
1704         /**
1705          * Get header link for given contact id
1706          *
1707          * @param integer $cid     contact id
1708          * @param string  $size    One of the ProxyUtils::SIZE_* constants
1709          * @param string  $updated Contact update date
1710          * @return string header link
1711          */
1712         public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = ''):string
1713         {
1714                 // We have to fetch the "updated" variable when it wasn't provided
1715                 // The parameter can be provided to improve performance
1716                 if (empty($updated)) {
1717                         $contact = self::getById($cid, ['updated']);
1718                         $updated = $contact['updated'] ?? '';
1719                 }
1720
1721                 $url = DI::baseUrl() . '/photo/header/';
1722                 switch ($size) {
1723                         case Proxy::SIZE_MICRO:
1724                                 $url .= Proxy::PIXEL_MICRO . '/';
1725                                 break;
1726                         case Proxy::SIZE_THUMB:
1727                                 $url .= Proxy::PIXEL_THUMB . '/';
1728                                 break;
1729                         case Proxy::SIZE_SMALL:
1730                                 $url .= Proxy::PIXEL_SMALL . '/';
1731                                 break;
1732                         case Proxy::SIZE_MEDIUM:
1733                                 $url .= Proxy::PIXEL_MEDIUM . '/';
1734                                 break;
1735                         case Proxy::SIZE_LARGE:
1736                                 $url .= Proxy::PIXEL_LARGE . '/';
1737                                 break;
1738                 }
1739
1740                 return $url . $cid . ($updated ? '?ts=' . strtotime($updated) : '');
1741         }
1742
1743         /**
1744          * Updates the avatar links in a contact only if needed
1745          *
1746          * @param int    $cid          Contact id
1747          * @param string $avatar       Link to avatar picture
1748          * @param bool   $force        force picture update
1749          * @param bool   $create_cache Enforces the creation of cached avatar fields
1750          *
1751          * @return void
1752          * @throws HTTPException\InternalServerErrorException
1753          * @throws HTTPException\NotFoundException
1754          * @throws \ImagickException
1755          */
1756         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1757         {
1758                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1759                         ['id' => $cid, 'self' => false]);
1760                 if (!DBA::isResult($contact)) {
1761                         return;
1762                 }
1763
1764                 $uid = $contact['uid'];
1765
1766                 // Only update the cached photo links of public contacts when they already are cached
1767                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1768                         if ($contact['avatar'] != $avatar) {
1769                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1770                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1771                         }
1772                         return;
1773                 }
1774
1775                 // User contacts use are updated through the public contacts
1776                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1777                         $pcid = self::getIdForURL($contact['url'], false);
1778                         if (!empty($pcid)) {
1779                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1780                                 self::updateAvatar($pcid, $avatar, $force, true);
1781                                 return;
1782                         }
1783                 }
1784
1785                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1786
1787                 if ($default_avatar) {
1788                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1789                 }
1790
1791                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1792                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1793                                 'photo' => $avatar,
1794                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1795                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1796                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1797                 }
1798
1799                 // Use the data from the self account
1800                 if (empty($fields)) {
1801                         $local_uid = User::getIdForURL($contact['url']);
1802                         if (!empty($local_uid)) {
1803                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1804                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1805                         }
1806                 }
1807
1808                 if (empty($fields)) {
1809                         $update = ($contact['avatar'] != $avatar) || $force;
1810
1811                         if (!$update) {
1812                                 $data = [
1813                                         $contact['photo'] ?? '',
1814                                         $contact['thumb'] ?? '',
1815                                         $contact['micro'] ?? '',
1816                                 ];
1817
1818                                 foreach ($data as $image_uri) {
1819                                         $image_rid = Photo::ridFromURI($image_uri);
1820                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1821                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1822                                                 $update = true;
1823                                         }
1824                                 }
1825                         }
1826
1827                         if ($update) {
1828                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1829                                 if ($photos) {
1830                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1831                                         $update = !empty($fields);
1832                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1833                                 } else {
1834                                         $update = false;
1835                                 }
1836                         }
1837                 } else {
1838                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1839                 }
1840
1841                 if (!$update) {
1842                         return;
1843                 }
1844
1845                 $cids = [];
1846                 $uids = [];
1847                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1848                         // Collect all user contacts of the given public contact
1849                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1850                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1851                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1852                                 $cids[] = $personal_contact['id'];
1853                                 $uids[] = $personal_contact['uid'];
1854                         }
1855                         DBA::close($personal_contacts);
1856
1857                         if (!empty($cids)) {
1858                                 // Delete possibly existing cached user contact avatars
1859                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1860                         }
1861                 }
1862
1863                 $cids[] = $cid;
1864                 $uids[] = $uid;
1865                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1866                 DBA::update('contact', $fields, ['id' => $cids]);
1867         }
1868
1869         public static function deleteContactByUrl(string $url)
1870         {
1871                 // Update contact data for all users
1872                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1873                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1874                 while ($contact = DBA::fetch($contacts)) {
1875                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1876                         self::remove($contact['id']);
1877                 }
1878         }
1879
1880         /**
1881          * Helper function for "updateFromProbe". Updates personal and public contact
1882          *
1883          * @param integer $id      contact id
1884          * @param integer $uid     user id
1885          * @param string  $old_url The previous profile URL of the contact
1886          * @param string  $new_url The profile URL of the contact
1887          * @param array   $fields  The fields that are updated
1888          *
1889          * @throws \Exception
1890          */
1891         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1892         {
1893                 if (Strings::normaliseLink($new_url) != Strings::normaliseLink($old_url)) {
1894                         Logger::notice('New URL differs from old URL', ['old' => $old_url, 'new' => $new_url]);
1895                         return;
1896                 }
1897
1898                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1899                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1900                         return;
1901                 }
1902
1903                 // Search for duplicated contacts and get rid of them
1904                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1905                         return;
1906                 }
1907
1908                 // Archive or unarchive the contact.
1909                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1910                 if (!DBA::isResult($contact)) {
1911                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1912                         return;
1913                 }
1914
1915                 if (isset($fields['failed'])) {
1916                         if ($fields['failed']) {
1917                                 self::markForArchival($contact);
1918                         } else {
1919                                 self::unmarkForArchival($contact);
1920                         }
1921                 }
1922
1923                 if ($contact['uid'] != 0) {
1924                         return;
1925                 }
1926
1927                 // Update contact data for all users
1928                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1929
1930                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1931                 DBA::update('contact', $fields, $condition);
1932
1933                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1934                 $condition['network'] = Protocol::OSTATUS;
1935
1936                 // If the contact failed, propagate the update fields to all contacts
1937                 if (empty($fields['failed'])) {
1938                         unset($fields['last-update']);
1939                         unset($fields['success_update']);
1940                         unset($fields['failure_update']);
1941                 }
1942
1943                 if (empty($fields)) {
1944                         return;
1945                 }
1946
1947                 DBA::update('contact', $fields, $condition);
1948         }
1949
1950         /**
1951          * Remove duplicated contacts
1952          *
1953          * @param string  $nurl  Normalised contact url
1954          * @param integer $uid   User id
1955          * @return boolean
1956          * @throws \Exception
1957          */
1958         public static function removeDuplicates(string $nurl, int $uid)
1959         {
1960                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1961                 $count = DBA::count('contact', $condition);
1962                 if ($count <= 1) {
1963                         return false;
1964                 }
1965
1966                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1967                 if (!DBA::isResult($first_contact)) {
1968                         // Shouldn't happen - so we handle it
1969                         return false;
1970                 }
1971
1972                 $first = $first_contact['id'];
1973                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1974                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1975                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1976                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1977                         return false;
1978                 }
1979
1980                 // Find all duplicates
1981                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1982                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1983                 while ($duplicate = DBA::fetch($duplicates)) {
1984                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1985                                 continue;
1986                         }
1987
1988                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1989                 }
1990                 DBA::close($duplicates);
1991                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
1992                 return true;
1993         }
1994
1995         /**
1996          * @param integer $id      contact id
1997          * @param string  $network Optional network we are probing for
1998          * @return boolean
1999          * @throws HTTPException\InternalServerErrorException
2000          * @throws \ImagickException
2001          */
2002         public static function updateFromProbe(int $id, string $network = '')
2003         {
2004                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
2005                 if (!DBA::isResult($contact)) {
2006                         return false;
2007                 }
2008
2009                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
2010                 return self::updateFromProbeArray($id, $ret);
2011         }
2012
2013         /**
2014          * @param integer $id      contact id
2015          * @param array   $ret     Probed data
2016          * @return boolean
2017          * @throws HTTPException\InternalServerErrorException
2018          * @throws \ImagickException
2019          */
2020         private static function updateFromProbeArray(int $id, array $ret)
2021         {
2022                 /*
2023                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
2024                   This will reliably kill your communication with old Friendica contacts.
2025                  */
2026
2027                 // These fields aren't updated by this routine:
2028                 // 'xmpp', 'sensitive'
2029
2030                 $fields = ['uid', 'uri-id', 'avatar', 'header', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
2031                         'manually-approve', 'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
2032                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
2033                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
2034                 if (!DBA::isResult($contact)) {
2035                         return false;
2036                 }
2037
2038                 if (self::isLocal($ret['url'])) {
2039                         if ($contact['uid'] == 0) {
2040                                 Logger::info('Local contacts are not updated here.');
2041                         } else {
2042                                 self::updateFromPublicContact($id, $contact);
2043                         }
2044                         return true;
2045                 }
2046
2047                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
2048                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
2049                         self::remove($id);
2050
2051                         // Delete all contacts with the same URL
2052                         self::deleteContactByUrl($ret['url']);
2053                         return true;
2054                 }
2055
2056                 $uid = $contact['uid'];
2057                 unset($contact['uid']);
2058
2059                 $uriid = $contact['uri-id'];
2060                 unset($contact['uri-id']);
2061
2062                 $pubkey = $contact['pubkey'];
2063                 unset($contact['pubkey']);
2064
2065                 $contact['photo'] = $contact['avatar'];
2066                 unset($contact['avatar']);
2067
2068                 $updated = DateTimeFormat::utcNow();
2069
2070                 // We must not try to update relay contacts via probe. They are no real contacts.
2071                 // We check after the probing to be able to correct falsely detected contact types.
2072                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
2073                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
2074                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2075                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
2076                         return true;
2077                 }
2078
2079                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
2080                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
2081                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
2082                         return false;
2083                 }
2084
2085                 if (Strings::normaliseLink($ret['url']) != Strings::normaliseLink($contact['url'])) {
2086                         $cid = self::getIdForURL($ret['url']);
2087                         if (!empty($cid) && ($cid != $id)) {
2088                                 Logger::notice('URL of contact changed.', ['id' => $id, 'new_id' => $cid, 'old' => $contact['url'], 'new' => $ret['url']]);
2089                                 return self::updateFromProbeArray($cid, $ret);
2090                         }
2091                 }
2092
2093                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
2094                         $ret['unsearchable'] = $ret['hide'];
2095                 }
2096
2097                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
2098                         $ret['forum'] = false;
2099                         $ret['prv'] = false;
2100                         $ret['contact-type'] = $ret['account-type'];
2101                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
2102                                 $ret['forum'] = (bool)!$ret['manually-approve'];
2103                                 $ret['prv'] = (bool)!$ret['forum'];
2104                         }
2105                 }
2106
2107                 $new_pubkey = $ret['pubkey'] ?? '';
2108
2109                 if ($uid == 0) {
2110                         $ret['last-item'] = Probe::getLastUpdate($ret);
2111                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
2112                 }
2113
2114                 $update = false;
2115                 $guid = $ret['guid'] ?? '';
2116
2117                 // make sure to not overwrite existing values with blank entries except some technical fields
2118                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2119                 foreach ($ret as $key => $val) {
2120                         if (!array_key_exists($key, $contact)) {
2121                                 unset($ret[$key]);
2122                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2123                                 $ret[$key] = $contact[$key];
2124                         } elseif ($ret[$key] != $contact[$key]) {
2125                                 $update = true;
2126                         }
2127                 }
2128
2129                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2130                         $update = true;
2131                 } else {
2132                         unset($ret['last-item']);
2133                 }
2134
2135                 if (empty($uriid)) {
2136                         $update = true;
2137                 }
2138
2139                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2140                         self::updateAvatar($id, $ret['photo'], $update);
2141                 }
2142
2143                 if (!$update) {
2144                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2145
2146                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2147                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2148                         }
2149
2150                         // Update the public contact
2151                         if ($uid != 0) {
2152                                 $contact = self::getByURL($ret['url'], false, ['id']);
2153                                 if (!empty($contact['id'])) {
2154                                         self::updateFromProbeArray($contact['id'], $ret);
2155                                 }
2156                         }
2157
2158                         return true;
2159                 }
2160
2161                 if (empty($guid)) {
2162                         $ret['uri-id'] = ItemURI::getIdByURI($ret['url']);
2163                 } else {
2164                         $ret['uri-id']  = ItemURI::insert(['uri' => $ret['uri'], 'guid' => $guid]);
2165                 }
2166
2167                 $ret['nurl']    = Strings::normaliseLink($ret['url']);
2168                 $ret['updated'] = $updated;
2169                 $ret['failed']  = false;
2170
2171                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2172                 if (empty($pubkey) && !empty($new_pubkey)) {
2173                         $ret['pubkey'] = $new_pubkey;
2174                 }
2175
2176                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2177                         $ret['uri-date'] = DateTimeFormat::utcNow();
2178                 }
2179
2180                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2181                         $ret['name-date'] = $updated;
2182                 }
2183
2184                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2185                         $ret['last-update'] = $updated;
2186                         $ret['success_update'] = $updated;
2187                 }
2188
2189                 unset($ret['photo']);
2190
2191                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2192
2193                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2194                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2195                 }
2196
2197                 return true;
2198         }
2199
2200         private static function updateFromPublicContact(int $id, array $contact)
2201         {
2202                 $public = self::getByURL($contact['url'], false);
2203
2204                 $fields = [];
2205
2206                 foreach ($contact as $field => $value) {
2207                         if ($field == 'uid') {
2208                                 continue;
2209                         }
2210                         if ($public[$field] != $value) {
2211                                 $fields[$field] = $public[$field];
2212                         }
2213                 }
2214                 if (!empty($fields)) {
2215                         DBA::update('contact', $fields, ['id' => $id, 'self' => false]);
2216                         Logger::info('Updating local contact', ['id' => $id]);
2217                 }
2218         }
2219
2220         /**
2221          * @param integer $url contact url
2222          * @return integer Contact id
2223          * @throws HTTPException\InternalServerErrorException
2224          * @throws \ImagickException
2225          */
2226         public static function updateFromProbeByURL($url)
2227         {
2228                 $id = self::getIdForURL($url);
2229
2230                 if (empty($id)) {
2231                         return $id;
2232                 }
2233
2234                 self::updateFromProbe($id);
2235
2236                 return $id;
2237         }
2238
2239         /**
2240          * Detects if a given contact array belongs to a legacy DFRN connection
2241          *
2242          * @param array $contact
2243          * @return boolean
2244          */
2245         public static function isLegacyDFRNContact($contact)
2246         {
2247                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2248                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2249         }
2250
2251         /**
2252          * Detects the communication protocol for a given contact url.
2253          * This is used to detect Friendica contacts that we can communicate via AP.
2254          *
2255          * @param string $url contact url
2256          * @param string $network Network of that contact
2257          * @return string with protocol
2258          */
2259         public static function getProtocol($url, $network)
2260         {
2261                 if ($network != Protocol::DFRN) {
2262                         return $network;
2263                 }
2264
2265                 $apcontact = APContact::getByURL($url);
2266                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2267                         return Protocol::ACTIVITYPUB;
2268                 } else {
2269                         return $network;
2270                 }
2271         }
2272
2273         /**
2274          * Takes a $uid and a url/handle and adds a new contact
2275          *
2276          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2277          * dfrn_request page.
2278          *
2279          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2280          *
2281          * Returns an array
2282          * $return['success'] boolean true if successful
2283          * $return['message'] error text if success is false.
2284          *
2285          * Takes a $uid and a url/handle and adds a new contact
2286          *
2287          * @param array  $user        The user the contact should be created for
2288          * @param string $url         The profile URL of the contact
2289          * @param bool   $interactive
2290          * @param string $network
2291          * @return array
2292          * @throws HTTPException\InternalServerErrorException
2293          * @throws HTTPException\NotFoundException
2294          * @throws \ImagickException
2295          */
2296         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2297         {
2298                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2299
2300                 // remove ajax junk, e.g. Twitter
2301                 $url = str_replace('/#!/', '/', $url);
2302
2303                 if (!Network::isUrlAllowed($url)) {
2304                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2305                         return $result;
2306                 }
2307
2308                 if (Network::isUrlBlocked($url)) {
2309                         $result['message'] = DI::l10n()->t('Blocked domain');
2310                         return $result;
2311                 }
2312
2313                 if (!$url) {
2314                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2315                         return $result;
2316                 }
2317
2318                 $arr = ['url' => $url, 'contact' => []];
2319
2320                 Hook::callAll('follow', $arr);
2321
2322                 if (empty($arr)) {
2323                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2324                         return $result;
2325                 }
2326
2327                 if (!empty($arr['contact']['name'])) {
2328                         $probed = false;
2329                         $ret = $arr['contact'];
2330                 } else {
2331                         $probed = true;
2332                         $ret = Probe::uri($url, $network, $user['uid']);
2333                 }
2334
2335                 if (($network != '') && ($ret['network'] != $network)) {
2336                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2337                         return $result;
2338                 }
2339
2340                 // check if we already have a contact
2341                 // the poll url is more reliable than the profile url, as we may have
2342                 // indirect links or webfinger links
2343
2344                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2345                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2346                 if (!DBA::isResult($contact)) {
2347                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2348                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2349                 }
2350
2351                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2352
2353                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2354                         if ($interactive) {
2355                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2356                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2357                                 } else {
2358                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2359                                 }
2360
2361                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2362
2363                                 // NOTREACHED
2364                         }
2365                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2366                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2367                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2368                         return $result;
2369                 }
2370
2371                 // This extra param just confuses things, remove it
2372                 if ($protocol === Protocol::DIASPORA) {
2373                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2374                 }
2375
2376                 // do we have enough information?
2377                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2378                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2379                         if (empty($ret['poll'])) {
2380                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2381                         }
2382                         if (empty($ret['name'])) {
2383                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2384                         }
2385                         if (empty($ret['url'])) {
2386                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2387                         }
2388                         if (strpos($ret['url'], '@') !== false) {
2389                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2390                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2391                         }
2392                         return $result;
2393                 }
2394
2395                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2396                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2397                         $ret['notify'] = '';
2398                 }
2399
2400                 if (!$ret['notify']) {
2401                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2402                 }
2403
2404                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2405
2406                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2407
2408                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2409
2410                 $pending = false;
2411                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2412                         $pending = (bool)$ret['manually-approve'];
2413                 }
2414
2415                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2416                         $writeable = 1;
2417                 }
2418
2419                 if (DBA::isResult($contact)) {
2420                         // update contact
2421                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2422
2423                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2424                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2425                 } else {
2426                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2427
2428                         // create contact record
2429                         self::insert([
2430                                 'uid'     => $user['uid'],
2431                                 'created' => DateTimeFormat::utcNow(),
2432                                 'url'     => $ret['url'],
2433                                 'nurl'    => Strings::normaliseLink($ret['url']),
2434                                 'addr'    => $ret['addr'],
2435                                 'alias'   => $ret['alias'],
2436                                 'batch'   => $ret['batch'],
2437                                 'notify'  => $ret['notify'],
2438                                 'poll'    => $ret['poll'],
2439                                 'poco'    => $ret['poco'],
2440                                 'name'    => $ret['name'],
2441                                 'nick'    => $ret['nick'],
2442                                 'network' => $ret['network'],
2443                                 'baseurl' => $ret['baseurl'],
2444                                 'gsid'    => $ret['gsid'] ?? null,
2445                                 'protocol' => $protocol,
2446                                 'pubkey'  => $ret['pubkey'],
2447                                 'rel'     => $new_relation,
2448                                 'priority'=> $ret['priority'],
2449                                 'writable'=> $writeable,
2450                                 'hidden'  => $hidden,
2451                                 'blocked' => 0,
2452                                 'readonly'=> 0,
2453                                 'pending' => $pending,
2454                                 'subhub'  => $subhub
2455                         ]);
2456                 }
2457
2458                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2459                 if (!DBA::isResult($contact)) {
2460                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2461                         return $result;
2462                 }
2463
2464                 $contact_id = $contact['id'];
2465                 $result['cid'] = $contact_id;
2466
2467                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2468
2469                 // Update the avatar
2470                 self::updateAvatar($contact_id, $ret['photo']);
2471
2472                 // pull feed and consume it, which should subscribe to the hub.
2473                 if ($contact['network'] == Protocol::OSTATUS) {
2474                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2475                 }
2476
2477                 if ($probed) {
2478                         self::updateFromProbeArray($contact_id, $ret);
2479                 } else {
2480                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2481                 }
2482
2483                 $owner = User::getOwnerDataById($user['uid']);
2484
2485                 if (DBA::isResult($owner)) {
2486                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2487                                 // create a follow slap
2488                                 $item = [];
2489                                 $item['verb'] = Activity::FOLLOW;
2490                                 $item['gravity'] = GRAVITY_ACTIVITY;
2491                                 $item['follow'] = $contact["url"];
2492                                 $item['body'] = '';
2493                                 $item['title'] = '';
2494                                 $item['guid'] = '';
2495                                 $item['uri-id'] = 0;
2496
2497                                 $slap = OStatus::salmon($item, $owner);
2498
2499                                 if (!empty($contact['notify'])) {
2500                                         Salmon::slapper($owner, $contact['notify'], $slap);
2501                                 }
2502                         } elseif ($protocol == Protocol::DIASPORA) {
2503                                 $ret = Diaspora::sendShare($owner, $contact);
2504                                 Logger::log('share returns: ' . $ret);
2505                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2506                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2507                                 if (empty($activity_id)) {
2508                                         // This really should never happen
2509                                         return false;
2510                                 }
2511
2512                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2513                                 Logger::log('Follow returns: ' . $ret);
2514                         }
2515                 }
2516
2517                 $result['success'] = true;
2518                 return $result;
2519         }
2520
2521         /**
2522          * Updated contact's SSL policy
2523          *
2524          * @param array  $contact    Contact array
2525          * @param string $new_policy New policy, valid: self,full
2526          *
2527          * @return array Contact array with updated values
2528          * @throws \Exception
2529          */
2530         public static function updateSslPolicy(array $contact, $new_policy)
2531         {
2532                 $ssl_changed = false;
2533                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2534                         $ssl_changed = true;
2535                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2536                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2537                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2538                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2539                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2540                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2541                 }
2542
2543                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2544                         $ssl_changed = true;
2545                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2546                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2547                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2548                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2549                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2550                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2551                 }
2552
2553                 if ($ssl_changed) {
2554                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2555                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2556                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2557                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2558                 }
2559
2560                 return $contact;
2561         }
2562
2563         /**
2564          * Follow a contact
2565          *
2566          * @param int $cid Public contact id
2567          * @param int $uid  User ID
2568          *
2569          * @return bool "true" if following had been successful
2570          */
2571         public static function follow(int $cid, int $uid)
2572         {
2573                 $user = User::getById($uid);
2574                 if (empty($user)) {
2575                         return false;
2576                 }
2577
2578                 $contact = self::getById($cid, ['url']);
2579
2580                 $result = self::createFromProbe($user, $contact['url'], false);
2581
2582                 return $result['cid'];
2583         }
2584
2585         /**
2586          * Unfollow a contact
2587          *
2588          * @param int $cid Public contact id
2589          * @param int $uid  User ID
2590          *
2591          * @return bool "true" if unfollowing had been successful
2592          */
2593         public static function unfollow(int $cid, int $uid)
2594         {
2595                 $cdata = self::getPublicAndUserContacID($cid, $uid);
2596                 if (empty($cdata['user'])) {
2597                         return false;
2598                 }
2599
2600                 $contact = self::getById($cdata['user']);
2601
2602                 self::removeSharer([], $contact);
2603
2604                 return true;
2605         }
2606
2607         /**
2608          * @param array  $importer Owner (local user) data
2609          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2610          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2611          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2612          * @param string $note     Introduction additional message
2613          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2614          * @throws HTTPException\InternalServerErrorException
2615          * @throws \ImagickException
2616          */
2617         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2618         {
2619                 // Should always be set
2620                 if (empty($datarray['author-id'])) {
2621                         return false;
2622                 }
2623
2624                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2625                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2626                 if (!DBA::isResult($pub_contact)) {
2627                         // Should never happen
2628                         return false;
2629                 }
2630
2631                 // Contact is blocked at node-level
2632                 if (self::isBlocked($datarray['author-id'])) {
2633                         return false;
2634                 }
2635
2636                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2637                 $name = $pub_contact['name'];
2638                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2639                 $nick = $pub_contact['nick'];
2640                 $network = $pub_contact['network'];
2641
2642                 // Ensure that we don't create a new contact when there already is one
2643                 $cid = self::getIdForURL($url, $importer['uid']);
2644                 if (!empty($cid)) {
2645                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2646                 }
2647
2648                 if (!empty($contact)) {
2649                         if (!empty($contact['pending'])) {
2650                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2651                                 return null;
2652                         }
2653
2654                         // Contact is blocked at user-level
2655                         if (!empty($contact['id']) && !empty($importer['id']) &&
2656                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2657                                 return false;
2658                         }
2659
2660                         // Make sure that the existing contact isn't archived
2661                         self::unmarkForArchival($contact);
2662
2663                         if (($contact['rel'] == self::SHARING)
2664                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2665                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2666                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2667                         }
2668
2669                         // Ensure to always have the correct network type, independent from the connection request method
2670                         self::updateFromProbe($contact['id']);
2671
2672                         Post\UserNotification::insertNotication($contact['id'], Verb::getID(Activity::FOLLOW), $importer['uid']);
2673
2674                         return true;
2675                 } else {
2676                         // send email notification to owner?
2677                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2678                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2679                                 return null;
2680                         }
2681
2682                         // create contact record
2683                         DBA::insert('contact', [
2684                                 'uid'      => $importer['uid'],
2685                                 'created'  => DateTimeFormat::utcNow(),
2686                                 'url'      => $url,
2687                                 'nurl'     => Strings::normaliseLink($url),
2688                                 'name'     => $name,
2689                                 'nick'     => $nick,
2690                                 'network'  => $network,
2691                                 'rel'      => self::FOLLOWER,
2692                                 'blocked'  => 0,
2693                                 'readonly' => 0,
2694                                 'pending'  => 1,
2695                                 'writable' => 1,
2696                         ]);
2697
2698                         $contact_id = DBA::lastInsertId();
2699
2700                         // Ensure to always have the correct network type, independent from the connection request method
2701                         self::updateFromProbe($contact_id);
2702
2703                         self::updateAvatar($contact_id, $photo, true);
2704
2705                         Post\UserNotification::insertNotication($contact_id, Verb::getID(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                                 $hash = Strings::getRandomHex();
2715
2716                                 if (is_array($contact_record)) {
2717                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2718                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2719                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2720                                 }
2721
2722                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2723
2724                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2725                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2726
2727                                         notification([
2728                                                 'type'  => Notification\Type::INTRO,
2729                                                 'otype' => Notification\ObjectType::INTRO,
2730                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2731                                                 'uid'   => $user['uid'],
2732                                                 'cid'   => $contact_record['id'],
2733                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2734                                         ]);
2735                                 }
2736                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2737                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2738                                         self::createFromProbe($importer, $url, false, $network);
2739                                 }
2740
2741                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2742                                 $fields = ['pending' => false];
2743                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2744                                         $fields['rel'] = self::FRIEND;
2745                                 }
2746
2747                                 DBA::update('contact', $fields, $condition);
2748
2749                                 return true;
2750                         }
2751                 }
2752
2753                 return null;
2754         }
2755
2756         public static function removeFollower($importer, $contact)
2757         {
2758                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2759                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2760                 } else {
2761                         self::remove($contact['id']);
2762                 }
2763         }
2764
2765         public static function removeSharer($importer, $contact)
2766         {
2767                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2768                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2769                 } else {
2770                         self::remove($contact['id']);
2771                 }
2772         }
2773
2774         /**
2775          * Create a birthday event.
2776          *
2777          * Update the year and the birthday.
2778          */
2779         public static function updateBirthdays()
2780         {
2781                 $condition = [
2782                         '`bd` > ?
2783                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2784                         AND NOT `contact`.`pending`
2785                         AND NOT `contact`.`hidden`
2786                         AND NOT `contact`.`blocked`
2787                         AND NOT `contact`.`archive`
2788                         AND NOT `contact`.`deleted`',
2789                         DBA::NULL_DATE,
2790                         self::SHARING,
2791                         self::FRIEND
2792                 ];
2793
2794                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2795
2796                 while ($contact = DBA::fetch($contacts)) {
2797                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2798
2799                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2800
2801                         if (Event::createBirthday($contact, $nextbd)) {
2802                                 // update bdyear
2803                                 DBA::update(
2804                                         'contact',
2805                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2806                                         ['id' => $contact['id']]
2807                                 );
2808                         }
2809                 }
2810                 DBA::close($contacts);
2811         }
2812
2813         /**
2814          * Remove the unavailable contact ids from the provided list
2815          *
2816          * @param array $contact_ids Contact id list
2817          * @return array
2818          * @throws \Exception
2819          */
2820         public static function pruneUnavailable(array $contact_ids)
2821         {
2822                 if (empty($contact_ids)) {
2823                         return [];
2824                 }
2825
2826                 $contacts = self::selectToArray(['id'], [
2827                         'id'      => $contact_ids,
2828                         'blocked' => false,
2829                         'pending' => false,
2830                         'archive' => false,
2831                 ]);
2832
2833                 return array_column($contacts, 'id');
2834         }
2835
2836         /**
2837          * Returns a magic link to authenticate remote visitors
2838          *
2839          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2840          *
2841          * @param string $contact_url The address of the target contact profile
2842          * @param string $url         An url that we will be redirected to after the authentication
2843          *
2844          * @return string with "redir" link
2845          * @throws HTTPException\InternalServerErrorException
2846          * @throws \ImagickException
2847          */
2848         public static function magicLink($contact_url, $url = '')
2849         {
2850                 if (!Session::isAuthenticated()) {
2851                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2852                 }
2853
2854                 $contact = self::getByURL($contact_url, false);
2855                 if (empty($contact)) {
2856                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2857                 }
2858
2859                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2860                 unset($contact['uid']);
2861
2862                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2863         }
2864
2865         /**
2866          * Returns a magic link to authenticate remote visitors
2867          *
2868          * @param integer $cid The contact id of the target contact profile
2869          * @param string  $url An url that we will be redirected to after the authentication
2870          *
2871          * @return string with "redir" link
2872          * @throws HTTPException\InternalServerErrorException
2873          * @throws \ImagickException
2874          */
2875         public static function magicLinkById($cid, $url = '')
2876         {
2877                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2878
2879                 return self::magicLinkByContact($contact, $url);
2880         }
2881
2882         /**
2883          * Returns a magic link to authenticate remote visitors
2884          *
2885          * @param array  $contact The contact array with "uid", "network" and "url"
2886          * @param string $url     An url that we will be redirected to after the authentication
2887          *
2888          * @return string with "redir" link
2889          * @throws HTTPException\InternalServerErrorException
2890          * @throws \ImagickException
2891          */
2892         public static function magicLinkByContact($contact, $url = '')
2893         {
2894                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2895
2896                 if (!Session::isAuthenticated()) {
2897                         return $destination;
2898                 }
2899
2900                 // Only redirections to the same host do make sense
2901                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2902                         return $url;
2903                 }
2904
2905                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2906                         return 'contact/' . $contact['id'] . '/conversations';
2907                 }
2908
2909                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2910                         return $destination;
2911                 }
2912
2913                 if (empty($contact['id'])) {
2914                         return $destination;
2915                 }
2916
2917                 $redirect = 'redir/' . $contact['id'];
2918
2919                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2920                         $redirect .= '?url=' . $url;
2921                 }
2922
2923                 return $redirect;
2924         }
2925
2926         /**
2927          * Is the contact a forum?
2928          *
2929          * @param integer $contactid ID of the contact
2930          *
2931          * @return boolean "true" if it is a forum
2932          */
2933         public static function isForum($contactid)
2934         {
2935                 $fields = ['forum', 'prv'];
2936                 $condition = ['id' => $contactid];
2937                 $contact = DBA::selectFirst('contact', $fields, $condition);
2938                 if (!DBA::isResult($contact)) {
2939                         return false;
2940                 }
2941
2942                 // Is it a forum?
2943                 return ($contact['forum'] || $contact['prv']);
2944         }
2945
2946         /**
2947          * Can the remote contact receive private messages?
2948          *
2949          * @param array $contact
2950          * @return bool
2951          */
2952         public static function canReceivePrivateMessages(array $contact)
2953         {
2954                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2955                 $self = $contact['self'] ?? false;
2956
2957                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2958         }
2959
2960         /**
2961          * Search contact table by nick or name
2962          *
2963          * @param string $search Name or nick
2964          * @param string $mode   Search mode (e.g. "community")
2965          * @param int    $uid    User ID
2966          *
2967          * @return array with search results
2968          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2969          */
2970         public static function searchByName(string $search, string $mode = '', int $uid = 0)
2971         {
2972                 if (empty($search)) {
2973                         return [];
2974                 }
2975
2976                 // check supported networks
2977                 if (DI::config()->get('system', 'diaspora_enabled')) {
2978                         $diaspora = Protocol::DIASPORA;
2979                 } else {
2980                         $diaspora = Protocol::DFRN;
2981                 }
2982
2983                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2984                         $ostatus = Protocol::OSTATUS;
2985                 } else {
2986                         $ostatus = Protocol::DFRN;
2987                 }
2988
2989                 // check if we search only communities or every contact
2990                 if ($mode === 'community') {
2991                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
2992                 } else {
2993                         $extra_sql = '';
2994                 }
2995
2996                 $search .= '%';
2997
2998                 $results = DBA::p("SELECT * FROM `contact`
2999                         WHERE (NOT `unsearchable` OR `nurl` IN (SELECT `nurl` FROM `owner-view` where `publish` OR `net-publish`))
3000                                 AND `network` IN (?, ?, ?, ?) AND
3001                                 NOT `failed` AND `uid` = ? AND
3002                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
3003                                 ORDER BY `nurl` DESC LIMIT 1000",
3004                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, $uid, $search, $search, $search
3005                 );
3006
3007                 $contacts = DBA::toArray($results);
3008                 return $contacts;
3009         }
3010
3011         /**
3012          * Add public contacts from an array
3013          *
3014          * @param array $urls
3015          * @return array result "count", "added" and "updated"
3016          */
3017         public static function addByUrls(array $urls)
3018         {
3019                 $added = 0;
3020                 $updated = 0;
3021                 $unchanged = 0;
3022                 $count = 0;
3023
3024                 foreach ($urls as $url) {
3025                         if (empty($url) || !is_string($url)) {
3026                                 continue;
3027                         }
3028                         $contact = self::getByURL($url, false, ['id', 'updated']);
3029                         if (empty($contact['id'])) {
3030                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
3031                                 ++$added;
3032                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
3033                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
3034                                 ++$updated;
3035                         } else {
3036                                 ++$unchanged;
3037                         }
3038                         ++$count;
3039                 }
3040
3041                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
3042         }
3043
3044         /**
3045          * Returns a random, global contact array of the current node
3046          *
3047          * @return array The profile array
3048          * @throws Exception
3049          */
3050         public static function getRandomContact()
3051         {
3052                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
3053                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
3054                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
3055                 ], ['order' => ['RAND()']]);
3056
3057                 if (DBA::isResult($contact)) {
3058                         return $contact;
3059                 }
3060
3061                 return [];
3062         }
3063 }