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