src/Model/Contact.php

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