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