src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use 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['created'])) {
 189                         $fields['created'] = DateTimeFormat::utcNow();
 190                 }
 191
 192                 $ret = DBA::insert('contact', $fields, $duplicate_mode);
 193                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 194                 if (!DBA::isResult($contact)) {
 195                         // Shouldn't happen
 196                         return $ret;
 197                 }
 198
 199                 // Search for duplicated contacts and get rid of them
 200                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 201
 202                 return $ret;
 203         }
 204
 205         /**
 206          * @param integer $id     Contact ID
 207          * @param array   $fields Array of selected fields, empty for all
 208          * @return array|boolean Contact record if it exists, false otherwise
 209          * @throws \Exception
 210          */
 211         public static function getById($id, $fields = [])
 212         {
 213                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 214         }
 215
 216         /**
 217          * Fetches a contact by a given url
 218          *
 219          * @param string  $url    profile url
 220          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 221          * @param array   $fields Field list
 222          * @param integer $uid    User ID of the contact
 223          * @return array contact array
 224          */
 225         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 226         {
 227                 if ($update || is_null($update)) {
 228                         $cid = self::getIdForURL($url, $uid, $update);
 229                         if (empty($cid)) {
 230                                 return [];
 231                         }
 232
 233                         $contact = self::getById($cid, $fields);
 234                         if (empty($contact)) {
 235                                 return [];
 236                         }
 237                         return $contact;
 238                 }
 239
 240                 // Add internal fields
 241                 $removal = [];
 242                 if (!empty($fields)) {
 243                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 244                                 if (!in_array($internal, $fields)) {
 245                                         $fields[] = $internal;
 246                                         $removal[] = $internal;
 247                                 }
 248                         }
 249                 }
 250
 251                 // We first try the nurl (http://server.tld/nick), most common case
 252                 $options = ['order' => ['id']];
 253                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 254
 255                 // Then the addr (nick@server.tld)
 256                 if (!DBA::isResult($contact)) {
 257                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 258                 }
 259
 260                 // Then the alias (which could be anything)
 261                 if (!DBA::isResult($contact)) {
 262                         // The link could be provided as http although we stored it as https
 263                         $ssl_url = str_replace('http://', 'https://', $url);
 264                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 265                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 266                 }
 267
 268                 if (!DBA::isResult($contact)) {
 269                         return [];
 270                 }
 271
 272                 // Update the contact in the background if needed
 273                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 274                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED)) {
 275                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 276                 }
 277
 278                 // Remove the internal fields
 279                 foreach ($removal as $internal) {
 280                         unset($contact[$internal]);
 281                 }
 282
 283                 return $contact;
 284         }
 285
 286         /**
 287          * Fetches a contact for a given user by a given url.
 288          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 289          *
 290          * @param string  $url    profile url
 291          * @param integer $uid    User ID of the contact
 292          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 293          * @param array   $fields Field list
 294          * @return array contact array
 295          */
 296         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 297         {
 298                 if ($uid != 0) {
 299                         $contact = self::getByURL($url, $update, $fields, $uid);
 300                         if (!empty($contact)) {
 301                                 if (!empty($contact['id'])) {
 302                                         $contact['cid'] = $contact['id'];
 303                                         $contact['zid'] = 0;
 304                                 }
 305                                 return $contact;
 306                         }
 307                 }
 308
 309                 $contact = self::getByURL($url, $update, $fields);
 310                 if (!empty($contact['id'])) {
 311                         $contact['cid'] = 0;
 312                         $contact['zid'] = $contact['id'];
 313                 }
 314                 return $contact;
 315         }
 316
 317         /**
 318          * Tests if the given contact is a follower
 319          *
 320          * @param int $cid Either public contact id or user's contact id
 321          * @param int $uid User ID
 322          *
 323          * @return boolean is the contact id a follower?
 324          * @throws HTTPException\InternalServerErrorException
 325          * @throws \ImagickException
 326          */
 327         public static function isFollower($cid, $uid)
 328         {
 329                 if (Contact\User::isBlocked($cid, $uid)) {
 330                         return false;
 331                 }
 332
 333                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 334                 if (empty($cdata['user'])) {
 335                         return false;
 336                 }
 337
 338                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 339                 return DBA::exists('contact', $condition);
 340         }
 341
 342         /**
 343          * Tests if the given contact url is a follower
 344          *
 345          * @param string $url Contact URL
 346          * @param int    $uid User ID
 347          *
 348          * @return boolean is the contact id a follower?
 349          * @throws HTTPException\InternalServerErrorException
 350          * @throws \ImagickException
 351          */
 352         public static function isFollowerByURL($url, $uid)
 353         {
 354                 $cid = self::getIdForURL($url, $uid);
 355
 356                 if (empty($cid)) {
 357                         return false;
 358                 }
 359
 360                 return self::isFollower($cid, $uid);
 361         }
 362
 363         /**
 364          * Tests if the given user follow the given contact
 365          *
 366          * @param int $cid Either public contact id or user's contact id
 367          * @param int $uid User ID
 368          *
 369          * @return boolean is the contact url being followed?
 370          * @throws HTTPException\InternalServerErrorException
 371          * @throws \ImagickException
 372          */
 373         public static function isSharing($cid, $uid)
 374         {
 375                 if (Contact\User::isBlocked($cid, $uid)) {
 376                         return false;
 377                 }
 378
 379                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 380                 if (empty($cdata['user'])) {
 381                         return false;
 382                 }
 383
 384                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 385                 return DBA::exists('contact', $condition);
 386         }
 387
 388         /**
 389          * Tests if the given user follow the given contact url
 390          *
 391          * @param string $url Contact URL
 392          * @param int    $uid User ID
 393          *
 394          * @return boolean is the contact url being followed?
 395          * @throws HTTPException\InternalServerErrorException
 396          * @throws \ImagickException
 397          */
 398         public static function isSharingByURL($url, $uid)
 399         {
 400                 $cid = self::getIdForURL($url, $uid);
 401
 402                 if (empty($cid)) {
 403                         return false;
 404                 }
 405
 406                 return self::isSharing($cid, $uid);
 407         }
 408
 409         /**
 410          * Get the basepath for a given contact link
 411          *
 412          * @param string $url The contact link
 413          * @param boolean $dont_update Don't update the contact
 414          *
 415          * @return string basepath
 416          * @throws HTTPException\InternalServerErrorException
 417          * @throws \ImagickException
 418          */
 419         public static function getBasepath($url, $dont_update = false)
 420         {
 421                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 422                 if (!DBA::isResult($contact)) {
 423                         return '';
 424                 }
 425
 426                 if (!empty($contact['baseurl'])) {
 427                         return $contact['baseurl'];
 428                 } elseif ($dont_update) {
 429                         return '';
 430                 }
 431
 432                 // Update the existing contact
 433                 self::updateFromProbe($contact['id']);
 434
 435                 // And fetch the result
 436                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 437                 if (empty($contact['baseurl'])) {
 438                         Logger::info('No baseurl for contact', ['url' => $url]);
 439                         return '';
 440                 }
 441
 442                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 443                 return $contact['baseurl'];
 444         }
 445
 446         /**
 447          * Check if the given contact url is on the same server
 448          *
 449          * @param string $url The contact link
 450          *
 451          * @return boolean Is it the same server?
 452          */
 453         public static function isLocal($url)
 454         {
 455                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 456         }
 457
 458         /**
 459          * Check if the given contact ID is on the same server
 460          *
 461          * @param string $url The contact link
 462          *
 463          * @return boolean Is it the same server?
 464          */
 465         public static function isLocalById(int $cid)
 466         {
 467                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 468                 if (!DBA::isResult($contact)) {
 469                         return false;
 470                 }
 471
 472                 if (empty($contact['baseurl'])) {
 473                         $baseurl = self::getBasepath($contact['url'], true);
 474                 } else {
 475                         $baseurl = $contact['baseurl'];
 476                 }
 477
 478                 return Strings::compareLink($baseurl, DI::baseUrl());
 479         }
 480
 481         /**
 482          * Returns the public contact id of the given user id
 483          *
 484          * @param  integer $uid User ID
 485          *
 486          * @return integer|boolean Public contact id for given user id
 487          * @throws \Exception
 488          */
 489         public static function getPublicIdByUserId($uid)
 490         {
 491                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 492                 if (!DBA::isResult($self)) {
 493                         return false;
 494                 }
 495                 return self::getIdForURL($self['url']);
 496         }
 497
 498         /**
 499          * Returns the contact id for the user and the public contact id for a given contact id
 500          *
 501          * @param int $cid Either public contact id or user's contact id
 502          * @param int $uid User ID
 503          *
 504          * @return array with public and user's contact id
 505          * @throws HTTPException\InternalServerErrorException
 506          * @throws \ImagickException
 507          */
 508         public static function getPublicAndUserContacID($cid, $uid)
 509         {
 510                 if (empty($uid) || empty($cid)) {
 511                         return [];
 512                 }
 513
 514                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 515                 if (!DBA::isResult($contact)) {
 516                         return [];
 517                 }
 518
 519                 // We quit when the user id don't match the user id of the provided contact
 520                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 521                         return [];
 522                 }
 523
 524                 if ($contact['uid'] != 0) {
 525                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 526                         if (empty($pcid)) {
 527                                 return [];
 528                         }
 529                         $ucid = $contact['id'];
 530                 } else {
 531                         $pcid = $contact['id'];
 532                         $ucid = self::getIdForURL($contact['url'], $uid);
 533                 }
 534
 535                 return ['public' => $pcid, 'user' => $ucid];
 536         }
 537
 538         /**
 539          * Returns contact details for a given contact id in combination with a user id
 540          *
 541          * @param int $cid A contact ID
 542          * @param int $uid The User ID
 543          * @param array $fields The selected fields for the contact
 544          *
 545          * @return array The contact details
 546          *
 547          * @throws \Exception
 548          */
 549         public static function getContactForUser($cid, $uid, array $fields = [])
 550         {
 551                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 552
 553                 if (!DBA::isResult($contact)) {
 554                         return [];
 555                 } else {
 556                         return $contact;
 557                 }
 558         }
 559
 560         /**
 561          * Creates the self-contact for the provided user id
 562          *
 563          * @param int $uid
 564          * @return bool Operation success
 565          * @throws HTTPException\InternalServerErrorException
 566          */
 567         public static function createSelfFromUserId($uid)
 568         {
 569                 // Only create the entry if it doesn't exist yet
 570                 if (DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 571                         return true;
 572                 }
 573
 574                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'], ['uid' => $uid]);
 575                 if (!DBA::isResult($user)) {
 576                         return false;
 577                 }
 578
 579                 $return = DBA::insert('contact', [
 580                         'uid'         => $user['uid'],
 581                         'created'     => DateTimeFormat::utcNow(),
 582                         'self'        => 1,
 583                         'name'        => $user['username'],
 584                         'nick'        => $user['nickname'],
 585                         'pubkey'      => $user['pubkey'],
 586                         'prvkey'      => $user['prvkey'],
 587                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 588                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 589                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 590                         'blocked'     => 0,
 591                         'pending'     => 0,
 592                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 593                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 594                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 595                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 596                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 597                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 598                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 599                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 600                         'name-date'   => DateTimeFormat::utcNow(),
 601                         'uri-date'    => DateTimeFormat::utcNow(),
 602                         'avatar-date' => DateTimeFormat::utcNow(),
 603                         'closeness'   => 0
 604                 ]);
 605
 606                 return $return;
 607         }
 608
 609         /**
 610          * Updates the self-contact for the provided user id
 611          *
 612          * @param int     $uid
 613          * @param boolean $update_avatar Force the avatar update
 614          * @throws HTTPException\InternalServerErrorException
 615          */
 616         public static function updateSelfFromUserID($uid, $update_avatar = false)
 617         {
 618                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 619                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 620                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco'];
 621                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 622                 if (!DBA::isResult($self)) {
 623                         return;
 624                 }
 625
 626                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 627                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid]);
 628                 if (!DBA::isResult($user)) {
 629                         return;
 630                 }
 631
 632                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 633                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 634                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 635                 if (!DBA::isResult($profile)) {
 636                         return;
 637                 }
 638
 639                 $file_suffix = 'jpg';
 640
 641                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 642                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 643                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 644                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 645                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp']];
 646
 647                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 648                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 649                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 650                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 651                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 652                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 653                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 654                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 655                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 656
 657                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 658                 if (DBA::isResult($avatar)) {
 659                         if ($update_avatar) {
 660                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 661                         }
 662
 663                         // Creating the path to the avatar, beginning with the file suffix
 664                         $types = Images::supportedTypes();
 665                         if (isset($types[$avatar['type']])) {
 666                                 $file_suffix = $types[$avatar['type']];
 667                         }
 668
 669                         // We are adding a timestamp value so that other systems won't use cached content
 670                         $timestamp = strtotime($fields['avatar-date']);
 671
 672                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 673                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 674
 675                         $fields['photo'] = $prefix . '4' . $suffix;
 676                         $fields['thumb'] = $prefix . '5' . $suffix;
 677                         $fields['micro'] = $prefix . '6' . $suffix;
 678                 } else {
 679                         // We hadn't found a photo entry, so we use the default avatar
 680                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 681                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 682                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 683                 }
 684
 685                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 686                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 687                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 688                 $fields['unsearchable'] = !$profile['net-publish'];
 689
 690                 $update = false;
 691
 692                 foreach ($fields as $field => $content) {
 693                         if ($self[$field] != $content) {
 694                                 $update = true;
 695                         }
 696                 }
 697
 698                 if ($update) {
 699                         if ($fields['name'] != $self['name']) {
 700                                 $fields['name-date'] = DateTimeFormat::utcNow();
 701                         }
 702                         $fields['updated'] = DateTimeFormat::utcNow();
 703                         DBA::update('contact', $fields, ['id' => $self['id']]);
 704
 705                         // Update the public contact as well
 706                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 707
 708                         // Update the profile
 709                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 710                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 711                         DBA::update('profile', $fields, ['uid' => $uid]);
 712                 }
 713         }
 714
 715         /**
 716          * Marks a contact for removal
 717          *
 718          * @param int $id contact id
 719          * @return null
 720          * @throws HTTPException\InternalServerErrorException
 721          */
 722         public static function remove($id)
 723         {
 724                 // We want just to make sure that we don't delete our "self" contact
 725                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 726                 if (!DBA::isResult($contact)) {
 727                         return;
 728                 }
 729
 730                 // Archive the contact
 731                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 732
 733                 // Delete it in the background
 734                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 735         }
 736
 737         /**
 738          * Sends an unfriend message. Does not remove the contact
 739          *
 740          * @param array   $user     User unfriending
 741          * @param array   $contact  Contact unfriended
 742          * @param boolean $dissolve Remove the contact on the remote side
 743          * @return void
 744          * @throws HTTPException\InternalServerErrorException
 745          * @throws \ImagickException
 746          */
 747         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 748         {
 749                 if (empty($contact['network'])) {
 750                         return;
 751                 }
 752
 753                 $protocol = $contact['network'];
 754                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 755                         $protocol = Protocol::ACTIVITYPUB;
 756                 }
 757
 758                 if (($protocol == Protocol::DFRN) && $dissolve) {
 759                         DFRN::deliver($user, $contact, 'placeholder', true);
 760                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 761                         // create an unfollow slap
 762                         $item = [];
 763                         $item['verb'] = Activity::O_UNFOLLOW;
 764                         $item['gravity'] = GRAVITY_ACTIVITY;
 765                         $item['follow'] = $contact["url"];
 766                         $item['body'] = '';
 767                         $item['title'] = '';
 768                         $item['guid'] = '';
 769                         $item['uri-id'] = 0;
 770                         $slap = OStatus::salmon($item, $user);
 771
 772                         if (!empty($contact['notify'])) {
 773                                 Salmon::slapper($user, $contact['notify'], $slap);
 774                         }
 775                 } elseif ($protocol == Protocol::DIASPORA) {
 776                         Diaspora::sendUnshare($user, $contact);
 777                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 778                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 779
 780                         if ($dissolve) {
 781                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 782                         }
 783                 }
 784         }
 785
 786         /**
 787          * Marks a contact for archival after a communication issue delay
 788          *
 789          * Contact has refused to recognise us as a friend. We will start a countdown.
 790          * If they still don't recognise us in 32 days, the relationship is over,
 791          * and we won't waste any more time trying to communicate with them.
 792          * This provides for the possibility that their database is temporarily messed
 793          * up or some other transient event and that there's a possibility we could recover from it.
 794          *
 795          * @param array $contact contact to mark for archival
 796          * @return null
 797          * @throws HTTPException\InternalServerErrorException
 798          */
 799         public static function markForArchival(array $contact)
 800         {
 801                 if (!isset($contact['url']) && !empty($contact['id'])) {
 802                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 803                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 804                         if (!DBA::isResult($contact)) {
 805                                 return;
 806                         }
 807                 } elseif (!isset($contact['url'])) {
 808                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 809                 }
 810
 811                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 812
 813                 // Contact already archived or "self" contact? => nothing to do
 814                 if ($contact['archive'] || $contact['self']) {
 815                         return;
 816                 }
 817
 818                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 819                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 820                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 821                 } else {
 822                         /* @todo
 823                          * We really should send a notification to the owner after 2-3 weeks
 824                          * so they won't be surprised when the contact vanishes and can take
 825                          * remedial action if this was a serious mistake or glitch
 826                          */
 827
 828                         /// @todo Check for contact vitality via probing
 829                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 830
 831                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 832                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 833                                 /* Relationship is really truly dead. archive them rather than
 834                                  * delete, though if the owner tries to unarchive them we'll start
 835                                  * the whole process over again.
 836                                  */
 837                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 838                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 839                         }
 840                 }
 841         }
 842
 843         /**
 844          * Cancels the archival countdown
 845          *
 846          * @see   Contact::markForArchival()
 847          *
 848          * @param array $contact contact to be unmarked for archival
 849          * @return null
 850          * @throws \Exception
 851          */
 852         public static function unmarkForArchival(array $contact)
 853         {
 854                 // Always unarchive the relay contact entry
 855                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 856                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 857                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 858                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 859                                 DBA::update('contact', $fields, $condition);
 860                         }
 861                 }
 862
 863                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 864                 $exists = DBA::exists('contact', $condition);
 865
 866                 // We don't need to update, we never marked this contact for archival
 867                 if (!$exists) {
 868                         return;
 869                 }
 870
 871                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 872
 873                 if (!isset($contact['url']) && !empty($contact['id'])) {
 874                         $fields = ['id', 'url', 'batch'];
 875                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 876                         if (!DBA::isResult($contact)) {
 877                                 return;
 878                         }
 879                 }
 880
 881                 // It's a miracle. Our dead contact has inexplicably come back to life.
 882                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 883                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 884                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 885         }
 886
 887         /**
 888          * Returns the data array for the photo menu of a given contact
 889          *
 890          * @param array $contact contact
 891          * @param int   $uid     optional, default 0
 892          * @return array
 893          * @throws HTTPException\InternalServerErrorException
 894          * @throws \ImagickException
 895          */
 896         public static function photoMenu(array $contact, $uid = 0)
 897         {
 898                 $pm_url = '';
 899                 $status_link = '';
 900                 $photos_link = '';
 901                 $contact_drop_link = '';
 902                 $poke_link = '';
 903
 904                 if ($uid == 0) {
 905                         $uid = local_user();
 906                 }
 907
 908                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 909                         if ($uid == 0) {
 910                                 $profile_link = self::magicLinkByContact($contact);
 911                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 912
 913                                 return $menu;
 914                         }
 915
 916                         // Look for our own contact if the uid doesn't match and isn't public
 917                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 918                         if (DBA::isResult($contact_own)) {
 919                                 return self::photoMenu($contact_own, $uid);
 920                         }
 921                 }
 922
 923                 $sparkle = false;
 924                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 925                         $sparkle = true;
 926                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 927                 } else {
 928                         $profile_link = $contact['url'];
 929                 }
 930
 931                 if ($profile_link === 'mailbox') {
 932                         $profile_link = '';
 933                 }
 934
 935                 if ($sparkle) {
 936                         $status_link = $profile_link . '/status';
 937                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 938                         $profile_link = $profile_link . '/profile';
 939                 }
 940
 941                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 942                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 943                 }
 944
 945                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 946                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 947                 }
 948
 949                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 950
 951                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 952
 953                 if (!$contact['self']) {
 954                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 955                 }
 956
 957                 $follow_link = '';
 958                 $unfollow_link = '';
 959                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 960                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 961                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
 962                         } elseif(!$contact['pending']) {
 963                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
 964                         }
 965                 }
 966
 967                 if (!empty($follow_link) || !empty($unfollow_link)) {
 968                         $contact_drop_link = '';
 969                 }
 970
 971                 /**
 972                  * Menu array:
 973                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 974                  */
 975                 if (empty($contact['uid'])) {
 976                         $menu = [
 977                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
 978                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
 979                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
 980                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
 981                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
 982                         ];
 983                 } else {
 984                         $menu = [
 985                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
 986                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
 987                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
 988                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
 989                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
 990                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
 991                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
 992                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
 993                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
 994                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
 995                         ];
 996
 997                         if (!empty($contact['pending'])) {
 998                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
 999                                 if (DBA::isResult($intro)) {
1000                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1001                                 }
1002                         }
1003                 }
1004
1005                 $args = ['contact' => $contact, 'menu' => &$menu];
1006
1007                 Hook::callAll('contact_photo_menu', $args);
1008
1009                 $menucondensed = [];
1010
1011                 foreach ($menu as $menuname => $menuitem) {
1012                         if ($menuitem[1] != '') {
1013                                 $menucondensed[$menuname] = $menuitem;
1014                         }
1015                 }
1016
1017                 return $menucondensed;
1018         }
1019
1020         /**
1021          * Fetch the contact id for a given URL and user
1022          *
1023          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1024          * `addr` or `alias`.
1025          *
1026          * If there's no record and we aren't looking for a public contact, we quit.
1027          * If there's one, we check that it isn't time to update the picture else we
1028          * directly return the found contact id.
1029          *
1030          * Second, we probe the provided $url whether it's http://server.tld/profile or
1031          * nick@server.tld. We quit if we can't get any info back.
1032          *
1033          * Third, we create the contact record if it doesn't exist
1034          *
1035          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1036          * if there's any updates
1037          *
1038          * @param string  $url       Contact URL
1039          * @param integer $uid       The user id for the contact (0 = public contact)
1040          * @param boolean $update    true = always update, false = never update, null = update when not found
1041          * @param array   $default   Default value for creating the contact when everything else fails
1042          *
1043          * @return integer Contact ID
1044          * @throws HTTPException\InternalServerErrorException
1045          * @throws \ImagickException
1046          */
1047         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1048         {
1049                 $contact_id = 0;
1050
1051                 if ($url == '') {
1052                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1053                         return 0;
1054                 }
1055
1056                 $contact = self::getByURL($url, false, ['id', 'network'], $uid);
1057
1058                 if (!empty($contact)) {
1059                         $contact_id = $contact["id"];
1060
1061                         if (empty($update)) {
1062                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1063                                 return $contact_id;
1064                         }
1065                 } elseif ($uid != 0) {
1066                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1067                         return 0;
1068                 } elseif (empty($default) && !is_null($update) && !$update) {
1069                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1070                         return 0;
1071                 }
1072
1073                 $data = [];
1074
1075                 if (empty($default['network']) || $update) {
1076                         $data = Probe::uri($url, "", $uid);
1077
1078                         // Take the default values when probing failed
1079                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1080                                 $data = array_merge($data, $default);
1081                         }
1082                 } elseif (!empty($default['network'])) {
1083                         $data = $default;
1084                 }
1085
1086                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1087                         // Fetch data for the public contact via the first found personal contact
1088                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1089                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'contact-type',
1090                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1091                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1092
1093                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1094                         if (!DBA::isResult($personal_contact)) {
1095                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1096                         }
1097
1098                         if (DBA::isResult($personal_contact)) {
1099                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1100                                 $data = $personal_contact;
1101                                 $data['photo'] = $personal_contact['avatar'];
1102                                 $data['account-type'] = $personal_contact['contact-type'];
1103                                 $data['hide'] = $personal_contact['unsearchable'];
1104                                 unset($data['avatar']);
1105                                 unset($data['contact-type']);
1106                                 unset($data['unsearchable']);
1107                         }
1108                 }
1109
1110                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1111                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1112                         return 0;
1113                 }
1114
1115                 if (!$contact_id) {
1116                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1117                         if (!empty($data['alias'])) {
1118                                 $urls[] = Strings::normaliseLink($data['alias']);
1119                         }
1120                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1121                         if (!empty($contact['id'])) {
1122                                 $contact_id = $contact['id'];
1123                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1124                         }
1125                 }
1126
1127                 if (!$contact_id) {
1128                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1129                         $fields = [
1130                                 'uid'       => $uid,
1131                                 'url'       => $data['url'],
1132                                 'nurl'      => Strings::normaliseLink($data['url']),
1133                                 'network'   => $data['network'],
1134                                 'created'   => DateTimeFormat::utcNow(),
1135                                 'rel'       => self::SHARING,
1136                                 'writable'  => 1,
1137                                 'blocked'   => 0,
1138                                 'readonly'  => 0,
1139                                 'pending'   => 0];
1140
1141                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1142
1143                         // Before inserting we do check if the entry does exist now.
1144                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1145                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1146                                 if (DBA::isResult($contact)) {
1147                                         $contact_id = $contact['id'];
1148                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1149                                 } else {
1150                                         DBA::insert('contact', $fields);
1151                                         $contact_id = DBA::lastInsertId();
1152                                         if ($contact_id) {
1153                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1154                                         }
1155                                 }
1156                                 DI::lock()->release(self::LOCK_INSERT);
1157                         } else {
1158                                 Logger::warning('Contact lock had not been acquired');
1159                         }
1160
1161                         if (!$contact_id) {
1162                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1163                                 return 0;
1164                         }
1165                 } else {
1166                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1167                 }
1168
1169                 self::updateFromProbeArray($contact_id, $data);
1170
1171                 // Don't return a number for a deleted account
1172                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1173                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1174                         return 0;
1175                 }
1176
1177                 return $contact_id;
1178         }
1179
1180         /**
1181          * Checks if the contact is archived
1182          *
1183          * @param int $cid contact id
1184          *
1185          * @return boolean Is the contact archived?
1186          * @throws HTTPException\InternalServerErrorException
1187          */
1188         public static function isArchived(int $cid)
1189         {
1190                 if ($cid == 0) {
1191                         return false;
1192                 }
1193
1194                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1195                 if (!DBA::isResult($contact)) {
1196                         return false;
1197                 }
1198
1199                 if ($contact['archive']) {
1200                         return true;
1201                 }
1202
1203                 // Check status of ActivityPub endpoints
1204                 $apcontact = APContact::getByURL($contact['url'], false);
1205                 if (!empty($apcontact)) {
1206                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1207                                 return true;
1208                         }
1209
1210                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1211                                 return true;
1212                         }
1213                 }
1214
1215                 // Check status of Diaspora endpoints
1216                 if (!empty($contact['batch'])) {
1217                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1218                         return DBA::exists('contact', $condition);
1219                 }
1220
1221                 return false;
1222         }
1223
1224         /**
1225          * Checks if the contact is blocked
1226          *
1227          * @param int $cid contact id
1228          *
1229          * @return boolean Is the contact blocked?
1230          * @throws HTTPException\InternalServerErrorException
1231          */
1232         public static function isBlocked($cid)
1233         {
1234                 if ($cid == 0) {
1235                         return false;
1236                 }
1237
1238                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1239                 if (!DBA::isResult($blocked)) {
1240                         return false;
1241                 }
1242
1243                 if (Network::isUrlBlocked($blocked['url'])) {
1244                         return true;
1245                 }
1246
1247                 return (bool) $blocked['blocked'];
1248         }
1249
1250         /**
1251          * Checks if the contact is hidden
1252          *
1253          * @param int $cid contact id
1254          *
1255          * @return boolean Is the contact hidden?
1256          * @throws \Exception
1257          */
1258         public static function isHidden($cid)
1259         {
1260                 if ($cid == 0) {
1261                         return false;
1262                 }
1263
1264                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1265                 if (!DBA::isResult($hidden)) {
1266                         return false;
1267                 }
1268                 return (bool) $hidden['hidden'];
1269         }
1270
1271         /**
1272          * Returns posts from a given contact url
1273          *
1274          * @param string $contact_url Contact URL
1275          * @param bool   $thread_mode
1276          * @param int    $update      Update mode
1277          * @param int    $parent      Item parent ID for the update mode
1278          * @return string posts in HTML
1279          * @throws \Exception
1280          */
1281         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1282         {
1283                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1284         }
1285
1286         /**
1287          * Returns posts from a given contact id
1288          *
1289          * @param int  $cid         Contact ID
1290          * @param bool $thread_mode
1291          * @param int  $update      Update mode
1292          * @param int  $parent     Item parent ID for the update mode
1293          * @return string posts in HTML
1294          * @throws \Exception
1295          */
1296         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1297         {
1298                 $a = DI::app();
1299
1300                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1301                 if (!DBA::isResult($contact)) {
1302                         return '';
1303                 }
1304
1305                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1306                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1307                 } else {
1308                         $sql = "`uid` = ?";
1309                 }
1310
1311                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1312
1313                 if ($thread_mode) {
1314                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1315                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1316                 } else {
1317                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1318                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1319                 }
1320
1321                 if (!empty($parent)) {
1322                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1323                 } else {
1324                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1325                         if (!empty($last_received)) {
1326                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1327                         }
1328                 }
1329
1330                 if (DI::mode()->isMobile()) {
1331                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1332                                 DI::config()->get('system', 'itemspage_network_mobile'));
1333                 } else {
1334                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1335                                 DI::config()->get('system', 'itemspage_network'));
1336                 }
1337
1338                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1339
1340                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1341
1342                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1343                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1344                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1345                 } else {
1346                         $o = '';
1347                 }
1348
1349                 if ($thread_mode) {
1350                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1351
1352                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1353                 } else {
1354                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1355
1356                         $o .= conversation($a, $items, 'contact-posts', $update);
1357                 }
1358
1359                 if (!$update) {
1360                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1361                                 $o .= HTML::scrollLoader();
1362                         } else {
1363                                 $o .= $pager->renderMinimal(count($items));
1364                         }
1365                 }
1366
1367                 return $o;
1368         }
1369
1370         /**
1371          * Returns the account type name
1372          *
1373          * The function can be called with either the user or the contact array
1374          *
1375          * @param array $contact contact or user array
1376          * @return string
1377          */
1378         public static function getAccountType(array $contact)
1379         {
1380                 // There are several fields that indicate that the contact or user is a forum
1381                 // "page-flags" is a field in the user table,
1382                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1383                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1384                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1385                         || (isset($contact['forum']) && intval($contact['forum']))
1386                         || (isset($contact['prv']) && intval($contact['prv']))
1387                         || (isset($contact['community']) && intval($contact['community']))
1388                 ) {
1389                         $type = self::TYPE_COMMUNITY;
1390                 } else {
1391                         $type = self::TYPE_PERSON;
1392                 }
1393
1394                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1395                 if (isset($contact["contact-type"])) {
1396                         $type = $contact["contact-type"];
1397                 }
1398
1399                 if (isset($contact["account-type"])) {
1400                         $type = $contact["account-type"];
1401                 }
1402
1403                 switch ($type) {
1404                         case self::TYPE_ORGANISATION:
1405                                 $account_type = DI::l10n()->t("Organisation");
1406                                 break;
1407
1408                         case self::TYPE_NEWS:
1409                                 $account_type = DI::l10n()->t('News');
1410                                 break;
1411
1412                         case self::TYPE_COMMUNITY:
1413                                 $account_type = DI::l10n()->t("Forum");
1414                                 break;
1415
1416                         default:
1417                                 $account_type = "";
1418                                 break;
1419                 }
1420
1421                 return $account_type;
1422         }
1423
1424         /**
1425          * Blocks a contact
1426          *
1427          * @param int $cid
1428          * @return bool
1429          * @throws \Exception
1430          */
1431         public static function block($cid, $reason = null)
1432         {
1433                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1434
1435                 return $return;
1436         }
1437
1438         /**
1439          * Unblocks a contact
1440          *
1441          * @param int $cid
1442          * @return bool
1443          * @throws \Exception
1444          */
1445         public static function unblock($cid)
1446         {
1447                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1448
1449                 return $return;
1450         }
1451
1452         /**
1453          * Ensure that cached avatar exist
1454          *
1455          * @param integer $cid
1456          */
1457         public static function checkAvatarCache(int $cid)
1458         {
1459                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1460                 if (!DBA::isResult($contact)) {
1461                         return;
1462                 }
1463
1464                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1465                         return;
1466                 }
1467
1468                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1469
1470                 self::updateAvatar($cid, $contact['avatar'], true);
1471         }
1472
1473         /**
1474          * Return the photo path for a given contact array in the given size
1475          *
1476          * @param array $contact  contact array
1477          * @param string $field   Fieldname of the photo in the contact array
1478          * @param string $size    Size of the avatar picture
1479          * @param string $avatar  Avatar path that is displayed when no photo had been found
1480          * @return string photo path
1481          */
1482         private static function getAvatarPath(array $contact, string $field, string $size, string $avatar)
1483         {
1484                 if (!empty($contact)) {
1485                         $contact = self::checkAvatarCacheByArray($contact);
1486                         if (!empty($contact[$field])) {
1487                                 $avatar = $contact[$field];
1488                         }
1489                 }
1490
1491                 if (empty($avatar)) {
1492                         $avatar = self::getDefaultAvatar([], $size);
1493                 }
1494
1495                 if (Proxy::isLocalImage($avatar)) {
1496                         return $avatar;
1497                 } else {
1498                         return Proxy::proxifyUrl($avatar, false, $size);
1499                 }
1500         }
1501
1502         /**
1503          * Return the photo path for a given contact array
1504          *
1505          * @param array $contact Contact array
1506          * @param string $avatar  Avatar path that is displayed when no photo had been found
1507          * @return string photo path
1508          */
1509         public static function getPhoto(array $contact, string $avatar = '')
1510         {
1511                 return self::getAvatarPath($contact, 'photo', Proxy::SIZE_SMALL, $avatar);
1512         }
1513
1514         /**
1515          * Return the photo path (thumb size) for a given contact array
1516          *
1517          * @param array $contact Contact array
1518          * @param string $avatar  Avatar path that is displayed when no photo had been found
1519          * @return string photo path
1520          */
1521         public static function getThumb(array $contact, string $avatar = '')
1522         {
1523                 return self::getAvatarPath($contact, 'thumb', Proxy::SIZE_THUMB, $avatar);
1524         }
1525
1526         /**
1527          * Return the photo path (micro size) for a given contact array
1528          *
1529          * @param array $contact Contact array
1530          * @param string $avatar  Avatar path that is displayed when no photo had been found
1531          * @return string photo path
1532          */
1533         public static function getMicro(array $contact, string $avatar = '')
1534         {
1535                 return self::getAvatarPath($contact, 'micro', Proxy::SIZE_MICRO, $avatar);
1536         }
1537
1538         /**
1539          * Check the given contact array for avatar cache fields
1540          *
1541          * @param array $contact
1542          * @return array contact array with avatar cache fields
1543          */
1544         private static function checkAvatarCacheByArray(array $contact)
1545         {
1546                 $update = false;
1547                 $contact_fields = [];
1548                 $fields = ['photo', 'thumb', 'micro'];
1549                 foreach ($fields as $field) {
1550                         if (isset($contact[$field])) {
1551                                 $contact_fields[] = $field;
1552                         }
1553                         if (isset($contact[$field]) && empty($contact[$field])) {
1554                                 $update = true;
1555                         }
1556                 }
1557
1558                 if (!$update) {
1559                         return $contact;
1560                 }
1561
1562                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1563                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1564
1565                         $new_contact = self::getById($contact['id'], $contact_fields);
1566                         if (DBA::isResult($new_contact)) {
1567                                 // We only update the cache fields
1568                                 $contact = array_merge($contact, $new_contact);
1569                         }
1570                 }
1571
1572                 /// add the default avatars if the fields aren't filled
1573                 if (isset($contact['photo']) && empty($contact['photo'])) {
1574                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1575                 }
1576                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1577                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1578                 }
1579                 if (isset($contact['micro']) && empty($contact['micro'])) {
1580                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1581                 }
1582
1583                 return $contact;
1584         }
1585
1586         /**
1587          * Fetch the default avatar for the given contact and size
1588          *
1589          * @param array $contact  contact array
1590          * @param string $size    Size of the avatar picture
1591          * @return void
1592          */
1593         public static function getDefaultAvatar(array $contact, string $size)
1594         {
1595                 switch ($size) {
1596                         case Proxy::SIZE_MICRO:
1597                                 $avatar['size'] = 48;
1598                                 $default = self::DEFAULT_AVATAR_MICRO;
1599                                 break;
1600
1601                         case Proxy::SIZE_THUMB:
1602                                 $avatar['size'] = 80;
1603                                 $default = self::DEFAULT_AVATAR_THUMB;
1604                                 break;
1605
1606                         case Proxy::SIZE_SMALL:
1607                         default:
1608                                 $avatar['size'] = 300;
1609                                 $default = self::DEFAULT_AVATAR_PHOTO;
1610                                 break;
1611                 }
1612
1613                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1614                         return DI::baseUrl() . $default;
1615                 }
1616
1617                 if (!empty($contact['xmpp'])) {
1618                         $avatar['email'] = $contact['xmpp'];
1619                 } elseif (!empty($contact['addr'])) {
1620                         $avatar['email'] = $contact['addr'];
1621                 } elseif (!empty($contact['url'])) {
1622                         $avatar['email'] = $contact['url'];
1623                 } else {
1624                         return DI::baseUrl() . $default;
1625                 }
1626
1627                 $avatar['url'] = '';
1628                 $avatar['success'] = false;
1629
1630                 Hook::callAll('avatar_lookup', $avatar);
1631
1632                 if ($avatar['success'] && !empty($avatar['url'])) {
1633                         return $avatar['url'];
1634                 }
1635
1636                 return DI::baseUrl() . $default;
1637         }
1638
1639         /**
1640          * Updates the avatar links in a contact only if needed
1641          *
1642          * @param int    $cid          Contact id
1643          * @param string $avatar       Link to avatar picture
1644          * @param bool   $force        force picture update
1645          * @param bool   $create_cache Enforces the creation of cached avatar fields
1646          *
1647          * @return void
1648          * @throws HTTPException\InternalServerErrorException
1649          * @throws HTTPException\NotFoundException
1650          * @throws \ImagickException
1651          */
1652         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1653         {
1654                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1655                         ['id' => $cid, 'self' => false]);
1656                 if (!DBA::isResult($contact)) {
1657                         return;
1658                 }
1659
1660                 $uid = $contact['uid'];
1661
1662                 // Only update the cached photo links of public contacts when they already are cached
1663                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1664                         if ($contact['avatar'] != $avatar) {
1665                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1666                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1667                         }
1668                         return;
1669                 }
1670
1671                 // User contacts use are updated through the public contacts
1672                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1673                         $pcid = self::getIdForURL($contact['url'], false);
1674                         if (!empty($pcid)) {
1675                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1676                                 self::updateAvatar($pcid, $avatar, $force, true);
1677                                 return;
1678                         }
1679                 }
1680
1681                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1682
1683                 if ($default_avatar) {
1684                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1685                 }
1686
1687                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1688                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1689                                 'photo' => $avatar,
1690                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1691                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1692                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1693                 }
1694
1695                 // Use the data from the self account
1696                 if (empty($fields)) {
1697                         $local_uid = User::getIdForURL($contact['url']);
1698                         if (!empty($local_uid)) {
1699                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1700                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1701                         }
1702                 }
1703
1704                 if (empty($fields)) {
1705                         $update = ($contact['avatar'] != $avatar) || $force;
1706
1707                         if (!$update) {
1708                                 $data = [
1709                                         $contact['photo'] ?? '',
1710                                         $contact['thumb'] ?? '',
1711                                         $contact['micro'] ?? '',
1712                                 ];
1713
1714                                 foreach ($data as $image_uri) {
1715                                         $image_rid = Photo::ridFromURI($image_uri);
1716                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1717                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1718                                                 $update = true;
1719                                         }
1720                                 }
1721                         }
1722
1723                         if ($update) {
1724                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1725                                 if ($photos) {
1726                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1727                                         $update = !empty($fields);
1728                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1729                                 } else {
1730                                         $update = false;
1731                                 }
1732                         }
1733                 } else {
1734                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1735                 }
1736
1737                 if (!$update) {
1738                         return;
1739                 }
1740
1741                 $cids = [];
1742                 $uids = [];
1743                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1744                         // Collect all user contacts of the given public contact
1745                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1746                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1747                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1748                                 $cids[] = $personal_contact['id'];
1749                                 $uids[] = $personal_contact['uid'];
1750                         }
1751                         DBA::close($personal_contacts);
1752
1753                         if (!empty($cids)) {
1754                                 // Delete possibly existing cached user contact avatars
1755                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1756                         }
1757                 }
1758
1759                 $cids[] = $cid;
1760                 $uids[] = $uid;
1761                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1762                 DBA::update('contact', $fields, ['id' => $cids]);
1763         }
1764
1765         public static function deleteContactByUrl(string $url)
1766         {
1767                 // Update contact data for all users
1768                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1769                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1770                 while ($contact = DBA::fetch($contacts)) {
1771                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1772                         self::remove($contact['id']);
1773                 }
1774         }
1775
1776         /**
1777          * Helper function for "updateFromProbe". Updates personal and public contact
1778          *
1779          * @param integer $id      contact id
1780          * @param integer $uid     user id
1781          * @param string  $old_url The previous profile URL of the contact
1782          * @param string  $new_url The profile URL of the contact
1783          * @param array   $fields  The fields that are updated
1784          *
1785          * @throws \Exception
1786          */
1787         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1788         {
1789                 if (Strings::normaliseLink($new_url) != Strings::normaliseLink($old_url)) {
1790                         Logger::notice('New URL differs from old URL', ['old' => $old_url, 'new' => $new_url]);
1791                         // @todo It is to decide what to do when the URL is changed
1792                 }
1793
1794                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1795                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1796                         return;
1797                 }
1798
1799                 // Search for duplicated contacts and get rid of them
1800                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1801                         return;
1802                 }
1803
1804                 // Archive or unarchive the contact.
1805                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1806                 if (!DBA::isResult($contact)) {
1807                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1808                         return;
1809                 }
1810
1811                 if (isset($fields['failed'])) {
1812                         if ($fields['failed']) {
1813                                 self::markForArchival($contact);
1814                         } else {
1815                                 self::unmarkForArchival($contact);
1816                         }
1817                 }
1818
1819                 if ($contact['uid'] != 0) {
1820                         return;
1821                 }
1822
1823                 // Update contact data for all users
1824                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1825
1826                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1827                 DBA::update('contact', $fields, $condition);
1828
1829                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1830                 $condition['network'] = Protocol::OSTATUS;
1831
1832                 // If the contact failed, propagate the update fields to all contacts
1833                 if (empty($fields['failed'])) {
1834                         unset($fields['last-update']);
1835                         unset($fields['success_update']);
1836                         unset($fields['failure_update']);
1837                 }
1838
1839                 if (empty($fields)) {
1840                         return;
1841                 }
1842
1843                 DBA::update('contact', $fields, $condition);
1844         }
1845
1846         /**
1847          * Remove duplicated contacts
1848          *
1849          * @param string  $nurl  Normalised contact url
1850          * @param integer $uid   User id
1851          * @return boolean
1852          * @throws \Exception
1853          */
1854         public static function removeDuplicates(string $nurl, int $uid)
1855         {
1856                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1857                 $count = DBA::count('contact', $condition);
1858                 if ($count <= 1) {
1859                         return false;
1860                 }
1861
1862                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1863                 if (!DBA::isResult($first_contact)) {
1864                         // Shouldn't happen - so we handle it
1865                         return false;
1866                 }
1867
1868                 $first = $first_contact['id'];
1869                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1870                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1871                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1872                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1873                         return false;
1874                 }
1875
1876                 // Find all duplicates
1877                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1878                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1879                 while ($duplicate = DBA::fetch($duplicates)) {
1880                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1881                                 continue;
1882                         }
1883
1884                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1885                 }
1886                 DBA::close($duplicates);
1887                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
1888                 return true;
1889         }
1890
1891         /**
1892          * @param integer $id      contact id
1893          * @param string  $network Optional network we are probing for
1894          * @return boolean
1895          * @throws HTTPException\InternalServerErrorException
1896          * @throws \ImagickException
1897          */
1898         public static function updateFromProbe(int $id, string $network = '')
1899         {
1900                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
1901                 if (!DBA::isResult($contact)) {
1902                         return false;
1903                 }
1904
1905                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
1906                 return self::updateFromProbeArray($id, $ret);
1907         }
1908
1909         /**
1910          * @param integer $id      contact id
1911          * @param array   $ret     Probed data
1912          * @return boolean
1913          * @throws HTTPException\InternalServerErrorException
1914          * @throws \ImagickException
1915          */
1916         private static function updateFromProbeArray(int $id, array $ret)
1917         {
1918                 /*
1919                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
1920                   This will reliably kill your communication with old Friendica contacts.
1921                  */
1922
1923                 // These fields aren't updated by this routine:
1924                 // 'xmpp', 'sensitive'
1925
1926                 $fields = ['uid', 'avatar', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe', 'manually-approve',
1927                         'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
1928                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
1929                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
1930                 if (!DBA::isResult($contact)) {
1931                         return false;
1932                 }
1933
1934                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1935                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
1936                         self::remove($id);
1937
1938                         // Delete all contacts with the same URL
1939                         self::deleteContactByUrl($ret['url']);
1940                         return true;
1941                 }
1942
1943                 $uid = $contact['uid'];
1944                 unset($contact['uid']);
1945
1946                 $pubkey = $contact['pubkey'];
1947                 unset($contact['pubkey']);
1948
1949                 $contact['photo'] = $contact['avatar'];
1950                 unset($contact['avatar']);
1951
1952                 $updated = DateTimeFormat::utcNow();
1953
1954                 // We must not try to update relay contacts via probe. They are no real contacts.
1955                 // We check after the probing to be able to correct falsely detected contact types.
1956                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
1957                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
1958                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
1959                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
1960                         return true;
1961                 }
1962
1963                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
1964                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
1965                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
1966                         return false;
1967                 }
1968
1969                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
1970                         $ret['unsearchable'] = $ret['hide'];
1971                 }
1972
1973                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
1974                         $ret['forum'] = false;
1975                         $ret['prv'] = false;
1976                         $ret['contact-type'] = $ret['account-type'];
1977                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
1978                                 $ret['forum'] = (bool)!$ret['manually-approve'];
1979                                 $ret['prv'] = (bool)!$ret['forum'];
1980                         }
1981                 }
1982
1983                 $new_pubkey = $ret['pubkey'] ?? '';
1984
1985                 if ($uid == 0) {
1986                         $ret['last-item'] = Probe::getLastUpdate($ret);
1987                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
1988                 }
1989
1990                 $update = false;
1991
1992                 // make sure to not overwrite existing values with blank entries except some technical fields
1993                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
1994                 foreach ($ret as $key => $val) {
1995                         if (!array_key_exists($key, $contact)) {
1996                                 unset($ret[$key]);
1997                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
1998                                 $ret[$key] = $contact[$key];
1999                         } elseif ($ret[$key] != $contact[$key]) {
2000                                 $update = true;
2001                         }
2002                 }
2003
2004                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2005                         $update = true;
2006                 } else {
2007                         unset($ret['last-item']);
2008                 }
2009
2010                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2011                         self::updateAvatar($id, $ret['photo'], $update);
2012                 }
2013
2014                 if (!$update) {
2015                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2016
2017                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2018                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2019                         }
2020
2021                         // Update the public contact
2022                         if ($uid != 0) {
2023                                 $contact = self::getByURL($ret['url'], false, ['id']);
2024                                 if (!empty($contact['id'])) {
2025                                         self::updateFromProbeArray($contact['id'], $ret);
2026                                 }
2027                         }
2028
2029                         return true;
2030                 }
2031
2032                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2033                 $ret['updated'] = $updated;
2034                 $ret['failed'] = false;
2035
2036                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2037                 if (empty($pubkey) && !empty($new_pubkey)) {
2038                         $ret['pubkey'] = $new_pubkey;
2039                 }
2040
2041                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2042                         $ret['uri-date'] = DateTimeFormat::utcNow();
2043                 }
2044
2045                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2046                         $ret['name-date'] = $updated;
2047                 }
2048
2049                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2050                         $ret['last-update'] = $updated;
2051                         $ret['success_update'] = $updated;
2052                 }
2053
2054                 unset($ret['photo']);
2055
2056                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2057
2058                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2059                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2060                 }
2061
2062                 return true;
2063         }
2064
2065         /**
2066          * @param integer $url contact url
2067          * @return integer Contact id
2068          * @throws HTTPException\InternalServerErrorException
2069          * @throws \ImagickException
2070          */
2071         public static function updateFromProbeByURL($url)
2072         {
2073                 $id = self::getIdForURL($url);
2074
2075                 if (empty($id)) {
2076                         return $id;
2077                 }
2078
2079                 self::updateFromProbe($id);
2080
2081                 return $id;
2082         }
2083
2084         /**
2085          * Detects if a given contact array belongs to a legacy DFRN connection
2086          *
2087          * @param array $contact
2088          * @return boolean
2089          */
2090         public static function isLegacyDFRNContact($contact)
2091         {
2092                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2093                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2094         }
2095
2096         /**
2097          * Detects the communication protocol for a given contact url.
2098          * This is used to detect Friendica contacts that we can communicate via AP.
2099          *
2100          * @param string $url contact url
2101          * @param string $network Network of that contact
2102          * @return string with protocol
2103          */
2104         public static function getProtocol($url, $network)
2105         {
2106                 if ($network != Protocol::DFRN) {
2107                         return $network;
2108                 }
2109
2110                 $apcontact = APContact::getByURL($url);
2111                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2112                         return Protocol::ACTIVITYPUB;
2113                 } else {
2114                         return $network;
2115                 }
2116         }
2117
2118         /**
2119          * Takes a $uid and a url/handle and adds a new contact
2120          *
2121          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2122          * dfrn_request page.
2123          *
2124          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2125          *
2126          * Returns an array
2127          * $return['success'] boolean true if successful
2128          * $return['message'] error text if success is false.
2129          *
2130          * Takes a $uid and a url/handle and adds a new contact
2131          *
2132          * @param array  $user        The user the contact should be created for
2133          * @param string $url         The profile URL of the contact
2134          * @param bool   $interactive
2135          * @param string $network
2136          * @return array
2137          * @throws HTTPException\InternalServerErrorException
2138          * @throws HTTPException\NotFoundException
2139          * @throws \ImagickException
2140          */
2141         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2142         {
2143                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2144
2145                 // remove ajax junk, e.g. Twitter
2146                 $url = str_replace('/#!/', '/', $url);
2147
2148                 if (!Network::isUrlAllowed($url)) {
2149                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2150                         return $result;
2151                 }
2152
2153                 if (Network::isUrlBlocked($url)) {
2154                         $result['message'] = DI::l10n()->t('Blocked domain');
2155                         return $result;
2156                 }
2157
2158                 if (!$url) {
2159                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2160                         return $result;
2161                 }
2162
2163                 $arr = ['url' => $url, 'contact' => []];
2164
2165                 Hook::callAll('follow', $arr);
2166
2167                 if (empty($arr)) {
2168                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2169                         return $result;
2170                 }
2171
2172                 if (!empty($arr['contact']['name'])) {
2173                         $ret = $arr['contact'];
2174                 } else {
2175                         $ret = Probe::uri($url, $network, $user['uid']);
2176                 }
2177
2178                 if (($network != '') && ($ret['network'] != $network)) {
2179                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2180                         return $result;
2181                 }
2182
2183                 // check if we already have a contact
2184                 // the poll url is more reliable than the profile url, as we may have
2185                 // indirect links or webfinger links
2186
2187                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2188                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2189                 if (!DBA::isResult($contact)) {
2190                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2191                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2192                 }
2193
2194                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2195
2196                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2197                         if ($interactive) {
2198                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2199                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2200                                 } else {
2201                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2202                                 }
2203
2204                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2205
2206                                 // NOTREACHED
2207                         }
2208                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2209                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2210                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2211                         return $result;
2212                 }
2213
2214                 // This extra param just confuses things, remove it
2215                 if ($protocol === Protocol::DIASPORA) {
2216                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2217                 }
2218
2219                 // do we have enough information?
2220                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2221                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2222                         if (empty($ret['poll'])) {
2223                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2224                         }
2225                         if (empty($ret['name'])) {
2226                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2227                         }
2228                         if (empty($ret['url'])) {
2229                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2230                         }
2231                         if (strpos($ret['url'], '@') !== false) {
2232                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2233                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2234                         }
2235                         return $result;
2236                 }
2237
2238                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2239                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2240                         $ret['notify'] = '';
2241                 }
2242
2243                 if (!$ret['notify']) {
2244                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2245                 }
2246
2247                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2248
2249                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2250
2251                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2252
2253                 $pending = false;
2254                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2255                         $pending = (bool)$ret['manually-approve'];
2256                 }
2257
2258                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2259                         $writeable = 1;
2260                 }
2261
2262                 if (DBA::isResult($contact)) {
2263                         // update contact
2264                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2265
2266                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2267                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2268                 } else {
2269                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2270
2271                         // create contact record
2272                         self::insert([
2273                                 'uid'     => $user['uid'],
2274                                 'created' => DateTimeFormat::utcNow(),
2275                                 'url'     => $ret['url'],
2276                                 'nurl'    => Strings::normaliseLink($ret['url']),
2277                                 'addr'    => $ret['addr'],
2278                                 'alias'   => $ret['alias'],
2279                                 'batch'   => $ret['batch'],
2280                                 'notify'  => $ret['notify'],
2281                                 'poll'    => $ret['poll'],
2282                                 'poco'    => $ret['poco'],
2283                                 'name'    => $ret['name'],
2284                                 'nick'    => $ret['nick'],
2285                                 'network' => $ret['network'],
2286                                 'baseurl' => $ret['baseurl'],
2287                                 'gsid'    => $ret['gsid'] ?? null,
2288                                 'protocol' => $protocol,
2289                                 'pubkey'  => $ret['pubkey'],
2290                                 'rel'     => $new_relation,
2291                                 'priority'=> $ret['priority'],
2292                                 'writable'=> $writeable,
2293                                 'hidden'  => $hidden,
2294                                 'blocked' => 0,
2295                                 'readonly'=> 0,
2296                                 'pending' => $pending,
2297                                 'subhub'  => $subhub
2298                         ]);
2299                 }
2300
2301                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2302                 if (!DBA::isResult($contact)) {
2303                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2304                         return $result;
2305                 }
2306
2307                 $contact_id = $contact['id'];
2308                 $result['cid'] = $contact_id;
2309
2310                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2311
2312                 // Update the avatar
2313                 self::updateAvatar($contact_id, $ret['photo']);
2314
2315                 // pull feed and consume it, which should subscribe to the hub.
2316                 if ($contact['network'] == Protocol::OSTATUS) {
2317                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2318                 } else {
2319                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2320                 }
2321
2322                 $owner = User::getOwnerDataById($user['uid']);
2323
2324                 if (DBA::isResult($owner)) {
2325                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2326                                 // create a follow slap
2327                                 $item = [];
2328                                 $item['verb'] = Activity::FOLLOW;
2329                                 $item['gravity'] = GRAVITY_ACTIVITY;
2330                                 $item['follow'] = $contact["url"];
2331                                 $item['body'] = '';
2332                                 $item['title'] = '';
2333                                 $item['guid'] = '';
2334                                 $item['uri-id'] = 0;
2335
2336                                 $slap = OStatus::salmon($item, $owner);
2337
2338                                 if (!empty($contact['notify'])) {
2339                                         Salmon::slapper($owner, $contact['notify'], $slap);
2340                                 }
2341                         } elseif ($protocol == Protocol::DIASPORA) {
2342                                 $ret = Diaspora::sendShare($owner, $contact);
2343                                 Logger::log('share returns: ' . $ret);
2344                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2345                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2346                                 if (empty($activity_id)) {
2347                                         // This really should never happen
2348                                         return false;
2349                                 }
2350
2351                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2352                                 Logger::log('Follow returns: ' . $ret);
2353                         }
2354                 }
2355
2356                 $result['success'] = true;
2357                 return $result;
2358         }
2359
2360         /**
2361          * Updated contact's SSL policy
2362          *
2363          * @param array  $contact    Contact array
2364          * @param string $new_policy New policy, valid: self,full
2365          *
2366          * @return array Contact array with updated values
2367          * @throws \Exception
2368          */
2369         public static function updateSslPolicy(array $contact, $new_policy)
2370         {
2371                 $ssl_changed = false;
2372                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2373                         $ssl_changed = true;
2374                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2375                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2376                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2377                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2378                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2379                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2380                 }
2381
2382                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2383                         $ssl_changed = true;
2384                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2385                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2386                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2387                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2388                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2389                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2390                 }
2391
2392                 if ($ssl_changed) {
2393                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2394                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2395                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2396                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2397                 }
2398
2399                 return $contact;
2400         }
2401
2402         /**
2403          * @param array  $importer Owner (local user) data
2404          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2405          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2406          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2407          * @param string $note     Introduction additional message
2408          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2409          * @throws HTTPException\InternalServerErrorException
2410          * @throws \ImagickException
2411          */
2412         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2413         {
2414                 // Should always be set
2415                 if (empty($datarray['author-id'])) {
2416                         return false;
2417                 }
2418
2419                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2420                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2421                 if (!DBA::isResult($pub_contact)) {
2422                         // Should never happen
2423                         return false;
2424                 }
2425
2426                 // Contact is blocked at node-level
2427                 if (self::isBlocked($datarray['author-id'])) {
2428                         return false;
2429                 }
2430
2431                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2432                 $name = $pub_contact['name'];
2433                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2434                 $nick = $pub_contact['nick'];
2435                 $network = $pub_contact['network'];
2436
2437                 // Ensure that we don't create a new contact when there already is one
2438                 $cid = self::getIdForURL($url, $importer['uid']);
2439                 if (!empty($cid)) {
2440                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2441                 }
2442
2443                 if (!empty($contact)) {
2444                         if (!empty($contact['pending'])) {
2445                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2446                                 return null;
2447                         }
2448
2449                         // Contact is blocked at user-level
2450                         if (!empty($contact['id']) && !empty($importer['id']) &&
2451                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2452                                 return false;
2453                         }
2454
2455                         // Make sure that the existing contact isn't archived
2456                         self::unmarkForArchival($contact);
2457
2458                         if (($contact['rel'] == self::SHARING)
2459                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2460                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2461                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2462                         }
2463
2464                         // Ensure to always have the correct network type, independent from the connection request method
2465                         self::updateFromProbe($contact['id']);
2466
2467                         return true;
2468                 } else {
2469                         // send email notification to owner?
2470                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2471                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2472                                 return null;
2473                         }
2474
2475                         // create contact record
2476                         DBA::insert('contact', [
2477                                 'uid'      => $importer['uid'],
2478                                 'created'  => DateTimeFormat::utcNow(),
2479                                 'url'      => $url,
2480                                 'nurl'     => Strings::normaliseLink($url),
2481                                 'name'     => $name,
2482                                 'nick'     => $nick,
2483                                 'network'  => $network,
2484                                 'rel'      => self::FOLLOWER,
2485                                 'blocked'  => 0,
2486                                 'readonly' => 0,
2487                                 'pending'  => 1,
2488                                 'writable' => 1,
2489                         ]);
2490
2491                         $contact_id = DBA::lastInsertId();
2492
2493                         // Ensure to always have the correct network type, independent from the connection request method
2494                         self::updateFromProbe($contact_id);
2495
2496                         self::updateAvatar($contact_id, $photo, true);
2497
2498                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2499
2500                         /// @TODO Encapsulate this into a function/method
2501                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2502                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2503                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2504                                 // create notification
2505                                 $hash = Strings::getRandomHex();
2506
2507                                 if (is_array($contact_record)) {
2508                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2509                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2510                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2511                                 }
2512
2513                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2514
2515                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2516                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2517
2518                                         notification([
2519                                                 'type'  => Notification\Type::INTRO,
2520                                                 'otype' => Notification\ObjectType::INTRO,
2521                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2522                                                 'uid'   => $user['uid'],
2523                                                 'cid'   => $contact_record['id'],
2524                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2525                                         ]);
2526                                 }
2527                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2528                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2529                                         self::createFromProbe($importer, $url, false, $network);
2530                                 }
2531
2532                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2533                                 $fields = ['pending' => false];
2534                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2535                                         $fields['rel'] = self::FRIEND;
2536                                 }
2537
2538                                 DBA::update('contact', $fields, $condition);
2539
2540                                 return true;
2541                         }
2542                 }
2543
2544                 return null;
2545         }
2546
2547         public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
2548         {
2549                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2550                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2551                 } else {
2552                         self::remove($contact['id']);
2553                 }
2554         }
2555
2556         public static function removeSharer($importer, $contact, array $datarray = [], $item = "")
2557         {
2558                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2559                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2560                 } else {
2561                         self::remove($contact['id']);
2562                 }
2563         }
2564
2565         /**
2566          * Create a birthday event.
2567          *
2568          * Update the year and the birthday.
2569          */
2570         public static function updateBirthdays()
2571         {
2572                 $condition = [
2573                         '`bd` != ""
2574                         AND `bd` > "0001-01-01"
2575                         AND SUBSTRING(`bd`, 1, 4) != `bdyear`
2576                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2577                         AND NOT `contact`.`pending`
2578                         AND NOT `contact`.`hidden`
2579                         AND NOT `contact`.`blocked`
2580                         AND NOT `contact`.`archive`
2581                         AND NOT `contact`.`deleted`',
2582                         self::SHARING,
2583                         self::FRIEND
2584                 ];
2585
2586                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2587
2588                 while ($contact = DBA::fetch($contacts)) {
2589                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2590
2591                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2592
2593                         if (Event::createBirthday($contact, $nextbd)) {
2594                                 // update bdyear
2595                                 DBA::update(
2596                                         'contact',
2597                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2598                                         ['id' => $contact['id']]
2599                                 );
2600                         }
2601                 }
2602                 DBA::close($contacts);
2603         }
2604
2605         /**
2606          * Remove the unavailable contact ids from the provided list
2607          *
2608          * @param array $contact_ids Contact id list
2609          * @return array
2610          * @throws \Exception
2611          */
2612         public static function pruneUnavailable(array $contact_ids)
2613         {
2614                 if (empty($contact_ids)) {
2615                         return [];
2616                 }
2617
2618                 $contacts = self::selectToArray(['id'], [
2619                         'id'      => $contact_ids,
2620                         'blocked' => false,
2621                         'pending' => false,
2622                         'archive' => false,
2623                 ]);
2624
2625                 return array_column($contacts, 'id');
2626         }
2627
2628         /**
2629          * Returns a magic link to authenticate remote visitors
2630          *
2631          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2632          *
2633          * @param string $contact_url The address of the target contact profile
2634          * @param string $url         An url that we will be redirected to after the authentication
2635          *
2636          * @return string with "redir" link
2637          * @throws HTTPException\InternalServerErrorException
2638          * @throws \ImagickException
2639          */
2640         public static function magicLink($contact_url, $url = '')
2641         {
2642                 if (!Session::isAuthenticated()) {
2643                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2644                 }
2645
2646                 $contact = self::getByURL($contact_url, false);
2647                 if (empty($contact)) {
2648                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2649                 }
2650
2651                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2652                 unset($contact['uid']);
2653
2654                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2655         }
2656
2657         /**
2658          * Returns a magic link to authenticate remote visitors
2659          *
2660          * @param integer $cid The contact id of the target contact profile
2661          * @param string  $url An url that we will be redirected to after the authentication
2662          *
2663          * @return string with "redir" link
2664          * @throws HTTPException\InternalServerErrorException
2665          * @throws \ImagickException
2666          */
2667         public static function magicLinkById($cid, $url = '')
2668         {
2669                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2670
2671                 return self::magicLinkByContact($contact, $url);
2672         }
2673
2674         /**
2675          * Returns a magic link to authenticate remote visitors
2676          *
2677          * @param array  $contact The contact array with "uid", "network" and "url"
2678          * @param string $url     An url that we will be redirected to after the authentication
2679          *
2680          * @return string with "redir" link
2681          * @throws HTTPException\InternalServerErrorException
2682          * @throws \ImagickException
2683          */
2684         public static function magicLinkByContact($contact, $url = '')
2685         {
2686                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2687
2688                 if (!Session::isAuthenticated()) {
2689                         return $destination;
2690                 }
2691
2692                 // Only redirections to the same host do make sense
2693                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2694                         return $url;
2695                 }
2696
2697                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2698                         return 'contact/' . $contact['id'] . '/conversations';
2699                 }
2700
2701                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2702                         return $destination;
2703                 }
2704
2705                 if (empty($contact['id'])) {
2706                         return $destination;
2707                 }
2708
2709                 $redirect = 'redir/' . $contact['id'];
2710
2711                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2712                         $redirect .= '?url=' . $url;
2713                 }
2714
2715                 return $redirect;
2716         }
2717
2718         /**
2719          * Is the contact a forum?
2720          *
2721          * @param integer $contactid ID of the contact
2722          *
2723          * @return boolean "true" if it is a forum
2724          */
2725         public static function isForum($contactid)
2726         {
2727                 $fields = ['forum', 'prv'];
2728                 $condition = ['id' => $contactid];
2729                 $contact = DBA::selectFirst('contact', $fields, $condition);
2730                 if (!DBA::isResult($contact)) {
2731                         return false;
2732                 }
2733
2734                 // Is it a forum?
2735                 return ($contact['forum'] || $contact['prv']);
2736         }
2737
2738         /**
2739          * Can the remote contact receive private messages?
2740          *
2741          * @param array $contact
2742          * @return bool
2743          */
2744         public static function canReceivePrivateMessages(array $contact)
2745         {
2746                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2747                 $self = $contact['self'] ?? false;
2748
2749                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2750         }
2751
2752         /**
2753          * Search contact table by nick or name
2754          *
2755          * @param string $search Name or nick
2756          * @param string $mode   Search mode (e.g. "community")
2757          *
2758          * @return array with search results
2759          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2760          */
2761         public static function searchByName($search, $mode = '')
2762         {
2763                 if (empty($search)) {
2764                         return [];
2765                 }
2766
2767                 // check supported networks
2768                 if (DI::config()->get('system', 'diaspora_enabled')) {
2769                         $diaspora = Protocol::DIASPORA;
2770                 } else {
2771                         $diaspora = Protocol::DFRN;
2772                 }
2773
2774                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2775                         $ostatus = Protocol::OSTATUS;
2776                 } else {
2777                         $ostatus = Protocol::DFRN;
2778                 }
2779
2780                 // check if we search only communities or every contact
2781                 if ($mode === 'community') {
2782                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
2783                 } else {
2784                         $extra_sql = '';
2785                 }
2786
2787                 $search .= '%';
2788
2789                 $results = DBA::p("SELECT * FROM `contact`
2790                         WHERE NOT `unsearchable` AND `network` IN (?, ?, ?, ?) AND
2791                                 NOT `failed` AND `uid` = ? AND
2792                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2793                                 ORDER BY `nurl` DESC LIMIT 1000",
2794                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, 0, $search, $search, $search
2795                 );
2796
2797                 $contacts = DBA::toArray($results);
2798                 return $contacts;
2799         }
2800
2801         /**
2802          * Add public contacts from an array
2803          *
2804          * @param array $urls
2805          * @return array result "count", "added" and "updated"
2806          */
2807         public static function addByUrls(array $urls)
2808         {
2809                 $added = 0;
2810                 $updated = 0;
2811                 $unchanged = 0;
2812                 $count = 0;
2813
2814                 foreach ($urls as $url) {
2815                         $contact = self::getByURL($url, false, ['id', 'updated']);
2816                         if (empty($contact['id'])) {
2817                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
2818                                 ++$added;
2819                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
2820                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
2821                                 ++$updated;
2822                         } else {
2823                                 ++$unchanged;
2824                         }
2825                         ++$count;
2826                 }
2827
2828                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
2829         }
2830
2831         /**
2832          * Returns a random, global contact array of the current node
2833          *
2834          * @return array The profile array
2835          * @throws Exception
2836          */
2837         public static function getRandomContact()
2838         {
2839                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
2840                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
2841                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
2842                 ], ['order' => ['RAND()']]);
2843
2844                 if (DBA::isResult($contact)) {
2845                         return $contact;
2846                 }
2847
2848                 return [];
2849         }
2850 }