src/Model/Contact.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\App\BaseURL;
  25 use Friendica\Content\Pager;
  26 use Friendica\Content\Text\HTML;
  27 use Friendica\Core\Hook;
  28 use Friendica\Core\Logger;
  29 use Friendica\Core\Protocol;
  30 use Friendica\Core\Renderer;
  31 use Friendica\Core\Session;
  32 use Friendica\Core\System;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\Database;
  35 use Friendica\Database\DBA;
  36 use Friendica\DI;
  37 use Friendica\Network\HTTPException;
  38 use Friendica\Network\Probe;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\DFRN;
  42 use Friendica\Protocol\Diaspora;
  43 use Friendica\Protocol\OStatus;
  44 use Friendica\Protocol\Salmon;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Images;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50
  51 /**
  52  * functions for interacting with a contact
  53  */
  54 class Contact
  55 {
  56         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  57         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  58         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  59
  60         /**
  61          * @deprecated since version 2019.03
  62          * @see User::PAGE_FLAGS_NORMAL
  63          */
  64         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  65         /**
  66          * @deprecated since version 2019.03
  67          * @see User::PAGE_FLAGS_SOAPBOX
  68          */
  69         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  70         /**
  71          * @deprecated since version 2019.03
  72          * @see User::PAGE_FLAGS_COMMUNITY
  73          */
  74         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  75         /**
  76          * @deprecated since version 2019.03
  77          * @see User::PAGE_FLAGS_FREELOVE
  78          */
  79         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  80         /**
  81          * @deprecated since version 2019.03
  82          * @see User::PAGE_FLAGS_BLOG
  83          */
  84         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  85         /**
  86          * @deprecated since version 2019.03
  87          * @see User::PAGE_FLAGS_PRVGROUP
  88          */
  89         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  90         /**
  91          * @}
  92          */
  93
  94         const LOCK_INSERT = 'contact-insert';
  95
  96         /**
  97          * Account types
  98          *
  99          * TYPE_UNKNOWN - unknown type
 100          *
 101          * TYPE_PERSON - the account belongs to a person
 102          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
 103          *
 104          * TYPE_ORGANISATION - the account belongs to an organisation
 105          *      Associated page type: PAGE_SOAPBOX
 106          *
 107          * TYPE_NEWS - the account is a news reflector
 108          *      Associated page type: PAGE_SOAPBOX
 109          *
 110          * TYPE_COMMUNITY - the account is community forum
 111          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 112          *
 113          * TYPE_RELAY - the account is a relay
 114          *      This will only be assigned to contacts, not to user accounts
 115          * @{
 116          */
 117         const TYPE_UNKNOWN =     -1;
 118         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 119         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 120         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 121         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 122         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 123         /**
 124          * @}
 125          */
 126
 127         /**
 128          * Contact_is
 129          *
 130          * Relationship types
 131          * @{
 132          */
 133         const NOTHING  = 0;
 134         const FOLLOWER = 1;
 135         const SHARING  = 2;
 136         const FRIEND   = 3;
 137         /**
 138          * @}
 139          */
 140
 141          const MIRROR_DEACTIVATED = 0;
 142          const MIRROR_FORWARDED = 1;
 143          const MIRROR_OWN_POST = 2;
 144          const MIRROR_NATIVE_RESHARE = 3;
 145
 146          /**
 147          * @param array $fields    Array of selected fields, empty for all
 148          * @param array $condition Array of fields for condition
 149          * @param array $params    Array of several parameters
 150          * @return array
 151          * @throws \Exception
 152          */
 153         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 154         {
 155                 return DBA::selectToArray('contact', $fields, $condition, $params);
 156         }
 157
 158         /**
 159          * @param array $fields    Array of selected fields, empty for all
 160          * @param array $condition Array of fields for condition
 161          * @param array $params    Array of several parameters
 162          * @return array
 163          * @throws \Exception
 164          */
 165         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 166         {
 167                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 168
 169                 return $contact;
 170         }
 171
 172         /**
 173          * Insert a row into the contact table
 174          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 175          *
 176          * @param array $fields         field array
 177          * @param int   $duplicate_mode Do an update on a duplicate entry
 178          *
 179          * @return boolean was the insert successful?
 180          * @throws \Exception
 181          */
 182         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 183         {
 184                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 185                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 186                 }
 187
 188                 if (empty($fields['created'])) {
 189                         $fields['created'] = DateTimeFormat::utcNow();
 190                 }
 191
 192                 $ret = DBA::insert('contact', $fields, $duplicate_mode);
 193                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 194                 if (!DBA::isResult($contact)) {
 195                         // Shouldn't happen
 196                         return $ret;
 197                 }
 198
 199                 // Search for duplicated contacts and get rid of them
 200                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 201
 202                 return $ret;
 203         }
 204
 205         /**
 206          * @param integer $id     Contact ID
 207          * @param array   $fields Array of selected fields, empty for all
 208          * @return array|boolean Contact record if it exists, false otherwise
 209          * @throws \Exception
 210          */
 211         public static function getById($id, $fields = [])
 212         {
 213                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 214         }
 215
 216         /**
 217          * Fetches a contact by a given url
 218          *
 219          * @param string  $url    profile url
 220          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 221          * @param array   $fields Field list
 222          * @param integer $uid    User ID of the contact
 223          * @return array contact array
 224          */
 225         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 226         {
 227                 if ($update || is_null($update)) {
 228                         $cid = self::getIdForURL($url, $uid, $update);
 229                         if (empty($cid)) {
 230                                 return [];
 231                         }
 232
 233                         $contact = self::getById($cid, $fields);
 234                         if (empty($contact)) {
 235                                 return [];
 236                         }
 237                         return $contact;
 238                 }
 239
 240                 // Add internal fields
 241                 $removal = [];
 242                 if (!empty($fields)) {
 243                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 244                                 if (!in_array($internal, $fields)) {
 245                                         $fields[] = $internal;
 246                                         $removal[] = $internal;
 247                                 }
 248                         }
 249                 }
 250
 251                 // We first try the nurl (http://server.tld/nick), most common case
 252                 $options = ['order' => ['id']];
 253                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 254
 255                 // Then the addr (nick@server.tld)
 256                 if (!DBA::isResult($contact)) {
 257                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 258                 }
 259
 260                 // Then the alias (which could be anything)
 261                 if (!DBA::isResult($contact)) {
 262                         // The link could be provided as http although we stored it as https
 263                         $ssl_url = str_replace('http://', 'https://', $url);
 264                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 265                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 266                 }
 267
 268                 if (!DBA::isResult($contact)) {
 269                         return [];
 270                 }
 271
 272                 // Update the contact in the background if needed
 273                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 274                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED)) {
 275                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 276                 }
 277
 278                 // Remove the internal fields
 279                 foreach ($removal as $internal) {
 280                         unset($contact[$internal]);
 281                 }
 282
 283                 return $contact;
 284         }
 285
 286         /**
 287          * Fetches a contact for a given user by a given url.
 288          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 289          *
 290          * @param string  $url    profile url
 291          * @param integer $uid    User ID of the contact
 292          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 293          * @param array   $fields Field list
 294          * @return array contact array
 295          */
 296         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 297         {
 298                 if ($uid != 0) {
 299                         $contact = self::getByURL($url, $update, $fields, $uid);
 300                         if (!empty($contact)) {
 301                                 if (!empty($contact['id'])) {
 302                                         $contact['cid'] = $contact['id'];
 303                                         $contact['zid'] = 0;
 304                                 }
 305                                 return $contact;
 306                         }
 307                 }
 308
 309                 $contact = self::getByURL($url, $update, $fields);
 310                 if (!empty($contact['id'])) {
 311                         $contact['cid'] = 0;
 312                         $contact['zid'] = $contact['id'];
 313                 }
 314                 return $contact;
 315         }
 316
 317         /**
 318          * Tests if the given contact is a follower
 319          *
 320          * @param int $cid Either public contact id or user's contact id
 321          * @param int $uid User ID
 322          *
 323          * @return boolean is the contact id a follower?
 324          * @throws HTTPException\InternalServerErrorException
 325          * @throws \ImagickException
 326          */
 327         public static function isFollower($cid, $uid)
 328         {
 329                 if (Contact\User::isBlocked($cid, $uid)) {
 330                         return false;
 331                 }
 332
 333                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 334                 if (empty($cdata['user'])) {
 335                         return false;
 336                 }
 337
 338                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 339                 return DBA::exists('contact', $condition);
 340         }
 341
 342         /**
 343          * Tests if the given contact url is a follower
 344          *
 345          * @param string $url Contact URL
 346          * @param int    $uid User ID
 347          *
 348          * @return boolean is the contact id a follower?
 349          * @throws HTTPException\InternalServerErrorException
 350          * @throws \ImagickException
 351          */
 352         public static function isFollowerByURL($url, $uid)
 353         {
 354                 $cid = self::getIdForURL($url, $uid);
 355
 356                 if (empty($cid)) {
 357                         return false;
 358                 }
 359
 360                 return self::isFollower($cid, $uid);
 361         }
 362
 363         /**
 364          * Tests if the given user follow the given contact
 365          *
 366          * @param int $cid Either public contact id or user's contact id
 367          * @param int $uid User ID
 368          *
 369          * @return boolean is the contact url being followed?
 370          * @throws HTTPException\InternalServerErrorException
 371          * @throws \ImagickException
 372          */
 373         public static function isSharing($cid, $uid)
 374         {
 375                 if (Contact\User::isBlocked($cid, $uid)) {
 376                         return false;
 377                 }
 378
 379                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 380                 if (empty($cdata['user'])) {
 381                         return false;
 382                 }
 383
 384                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 385                 return DBA::exists('contact', $condition);
 386         }
 387
 388         /**
 389          * Tests if the given user follow the given contact url
 390          *
 391          * @param string $url Contact URL
 392          * @param int    $uid User ID
 393          *
 394          * @return boolean is the contact url being followed?
 395          * @throws HTTPException\InternalServerErrorException
 396          * @throws \ImagickException
 397          */
 398         public static function isSharingByURL($url, $uid)
 399         {
 400                 $cid = self::getIdForURL($url, $uid);
 401
 402                 if (empty($cid)) {
 403                         return false;
 404                 }
 405
 406                 return self::isSharing($cid, $uid);
 407         }
 408
 409         /**
 410          * Get the basepath for a given contact link
 411          *
 412          * @param string $url The contact link
 413          * @param boolean $dont_update Don't update the contact
 414          *
 415          * @return string basepath
 416          * @throws HTTPException\InternalServerErrorException
 417          * @throws \ImagickException
 418          */
 419         public static function getBasepath($url, $dont_update = false)
 420         {
 421                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 422                 if (!DBA::isResult($contact)) {
 423                         return '';
 424                 }
 425
 426                 if (!empty($contact['baseurl'])) {
 427                         return $contact['baseurl'];
 428                 } elseif ($dont_update) {
 429                         return '';
 430                 }
 431
 432                 // Update the existing contact
 433                 self::updateFromProbe($contact['id']);
 434
 435                 // And fetch the result
 436                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 437                 if (empty($contact['baseurl'])) {
 438                         Logger::info('No baseurl for contact', ['url' => $url]);
 439                         return '';
 440                 }
 441
 442                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 443                 return $contact['baseurl'];
 444         }
 445
 446         /**
 447          * Check if the given contact url is on the same server
 448          *
 449          * @param string $url The contact link
 450          *
 451          * @return boolean Is it the same server?
 452          */
 453         public static function isLocal($url)
 454         {
 455                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 456         }
 457
 458         /**
 459          * Check if the given contact ID is on the same server
 460          *
 461          * @param string $url The contact link
 462          *
 463          * @return boolean Is it the same server?
 464          */
 465         public static function isLocalById(int $cid)
 466         {
 467                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 468                 if (!DBA::isResult($contact)) {
 469                         return false;
 470                 }
 471
 472                 if (empty($contact['baseurl'])) {
 473                         $baseurl = self::getBasepath($contact['url'], true);
 474                 } else {
 475                         $baseurl = $contact['baseurl'];
 476                 }
 477
 478                 return Strings::compareLink($baseurl, DI::baseUrl());
 479         }
 480
 481         /**
 482          * Returns the public contact id of the given user id
 483          *
 484          * @param  integer $uid User ID
 485          *
 486          * @return integer|boolean Public contact id for given user id
 487          * @throws \Exception
 488          */
 489         public static function getPublicIdByUserId($uid)
 490         {
 491                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 492                 if (!DBA::isResult($self)) {
 493                         return false;
 494                 }
 495                 return self::getIdForURL($self['url']);
 496         }
 497
 498         /**
 499          * Returns the contact id for the user and the public contact id for a given contact id
 500          *
 501          * @param int $cid Either public contact id or user's contact id
 502          * @param int $uid User ID
 503          *
 504          * @return array with public and user's contact id
 505          * @throws HTTPException\InternalServerErrorException
 506          * @throws \ImagickException
 507          */
 508         public static function getPublicAndUserContacID($cid, $uid)
 509         {
 510                 if (empty($uid) || empty($cid)) {
 511                         return [];
 512                 }
 513
 514                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 515                 if (!DBA::isResult($contact)) {
 516                         return [];
 517                 }
 518
 519                 // We quit when the user id don't match the user id of the provided contact
 520                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 521                         return [];
 522                 }
 523
 524                 if ($contact['uid'] != 0) {
 525                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 526                         if (empty($pcid)) {
 527                                 return [];
 528                         }
 529                         $ucid = $contact['id'];
 530                 } else {
 531                         $pcid = $contact['id'];
 532                         $ucid = self::getIdForURL($contact['url'], $uid);
 533                 }
 534
 535                 return ['public' => $pcid, 'user' => $ucid];
 536         }
 537
 538         /**
 539          * Returns contact details for a given contact id in combination with a user id
 540          *
 541          * @param int $cid A contact ID
 542          * @param int $uid The User ID
 543          * @param array $fields The selected fields for the contact
 544          *
 545          * @return array The contact details
 546          *
 547          * @throws \Exception
 548          */
 549         public static function getContactForUser($cid, $uid, array $fields = [])
 550         {
 551                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 552
 553                 if (!DBA::isResult($contact)) {
 554                         return [];
 555                 } else {
 556                         return $contact;
 557                 }
 558         }
 559
 560         /**
 561          * Creates the self-contact for the provided user id
 562          *
 563          * @param int $uid
 564          * @return bool Operation success
 565          * @throws HTTPException\InternalServerErrorException
 566          */
 567         public static function createSelfFromUserId($uid)
 568         {
 569                 // Only create the entry if it doesn't exist yet
 570                 if (DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 571                         return true;
 572                 }
 573
 574                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'],
 575                         ['uid' => $uid, 'account_expired' => false]);
 576                 if (!DBA::isResult($user)) {
 577                         return false;
 578                 }
 579
 580                 $return = DBA::insert('contact', [
 581                         'uid'         => $user['uid'],
 582                         'created'     => DateTimeFormat::utcNow(),
 583                         'self'        => 1,
 584                         'name'        => $user['username'],
 585                         'nick'        => $user['nickname'],
 586                         'pubkey'      => $user['pubkey'],
 587                         'prvkey'      => $user['prvkey'],
 588                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 589                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 590                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 591                         'blocked'     => 0,
 592                         'pending'     => 0,
 593                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 594                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 595                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 596                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 597                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 598                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 599                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 600                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 601                         'name-date'   => DateTimeFormat::utcNow(),
 602                         'uri-date'    => DateTimeFormat::utcNow(),
 603                         'avatar-date' => DateTimeFormat::utcNow(),
 604                         'closeness'   => 0
 605                 ]);
 606
 607                 return $return;
 608         }
 609
 610         /**
 611          * Updates the self-contact for the provided user id
 612          *
 613          * @param int     $uid
 614          * @param boolean $update_avatar Force the avatar update
 615          * @throws HTTPException\InternalServerErrorException
 616          */
 617         public static function updateSelfFromUserID($uid, $update_avatar = false)
 618         {
 619                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar', 'prvkey', 'pubkey',
 620                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 621                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco'];
 622                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 623                 if (!DBA::isResult($self)) {
 624                         return;
 625                 }
 626
 627                 $fields = ['nickname', 'page-flags', 'account-type', 'prvkey', 'pubkey'];
 628                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid, 'account_expired' => false]);
 629                 if (!DBA::isResult($user)) {
 630                         return;
 631                 }
 632
 633                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 634                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 635                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 636                 if (!DBA::isResult($profile)) {
 637                         return;
 638                 }
 639
 640                 $file_suffix = 'jpg';
 641
 642                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 643                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 644                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 645                         'contact-type' => $user['account-type'], 'prvkey' => $user['prvkey'],
 646                         'pubkey' => $user['pubkey'], 'xmpp' => $profile['xmpp']];
 647
 648                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 649                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 650                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 651                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 652                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 653                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 654                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 655                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 656                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 657
 658                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 659                 if (DBA::isResult($avatar)) {
 660                         if ($update_avatar) {
 661                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 662                         }
 663
 664                         // Creating the path to the avatar, beginning with the file suffix
 665                         $types = Images::supportedTypes();
 666                         if (isset($types[$avatar['type']])) {
 667                                 $file_suffix = $types[$avatar['type']];
 668                         }
 669
 670                         // We are adding a timestamp value so that other systems won't use cached content
 671                         $timestamp = strtotime($fields['avatar-date']);
 672
 673                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 674                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 675
 676                         $fields['photo'] = $prefix . '4' . $suffix;
 677                         $fields['thumb'] = $prefix . '5' . $suffix;
 678                         $fields['micro'] = $prefix . '6' . $suffix;
 679                 } else {
 680                         // We hadn't found a photo entry, so we use the default avatar
 681                         $fields['photo'] = self::getDefaultAvatar($fields, Proxy::SIZE_SMALL);
 682                         $fields['thumb'] = self::getDefaultAvatar($fields, Proxy::SIZE_THUMB);
 683                         $fields['micro'] = self::getDefaultAvatar($fields, Proxy::SIZE_MICRO);
 684                 }
 685
 686                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 687                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 688                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 689                 $fields['unsearchable'] = !$profile['net-publish'];
 690
 691                 $update = false;
 692
 693                 foreach ($fields as $field => $content) {
 694                         if ($self[$field] != $content) {
 695                                 $update = true;
 696                         }
 697                 }
 698
 699                 if ($update) {
 700                         if ($fields['name'] != $self['name']) {
 701                                 $fields['name-date'] = DateTimeFormat::utcNow();
 702                         }
 703                         $fields['updated'] = DateTimeFormat::utcNow();
 704                         DBA::update('contact', $fields, ['id' => $self['id']]);
 705
 706                         // Update the public contact as well
 707                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 708
 709                         // Update the profile
 710                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 711                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 712                         DBA::update('profile', $fields, ['uid' => $uid]);
 713                 }
 714         }
 715
 716         /**
 717          * Marks a contact for removal
 718          *
 719          * @param int $id contact id
 720          * @return null
 721          * @throws HTTPException\InternalServerErrorException
 722          */
 723         public static function remove($id)
 724         {
 725                 // We want just to make sure that we don't delete our "self" contact
 726                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 727                 if (!DBA::isResult($contact)) {
 728                         return;
 729                 }
 730
 731                 // Archive the contact
 732                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 733
 734                 // Delete it in the background
 735                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 736         }
 737
 738         /**
 739          * Sends an unfriend message. Does not remove the contact
 740          *
 741          * @param array   $user     User unfriending
 742          * @param array   $contact  Contact unfriended
 743          * @param boolean $dissolve Remove the contact on the remote side
 744          * @return void
 745          * @throws HTTPException\InternalServerErrorException
 746          * @throws \ImagickException
 747          */
 748         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 749         {
 750                 if (empty($contact['network'])) {
 751                         return;
 752                 }
 753
 754                 $protocol = $contact['network'];
 755                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 756                         $protocol = Protocol::ACTIVITYPUB;
 757                 }
 758
 759                 if (($protocol == Protocol::DFRN) && $dissolve) {
 760                         DFRN::deliver($user, $contact, 'placeholder', true);
 761                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 762                         // create an unfollow slap
 763                         $item = [];
 764                         $item['verb'] = Activity::O_UNFOLLOW;
 765                         $item['gravity'] = GRAVITY_ACTIVITY;
 766                         $item['follow'] = $contact["url"];
 767                         $item['body'] = '';
 768                         $item['title'] = '';
 769                         $item['guid'] = '';
 770                         $item['uri-id'] = 0;
 771                         $slap = OStatus::salmon($item, $user);
 772
 773                         if (!empty($contact['notify'])) {
 774                                 Salmon::slapper($user, $contact['notify'], $slap);
 775                         }
 776                 } elseif ($protocol == Protocol::DIASPORA) {
 777                         Diaspora::sendUnshare($user, $contact);
 778                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 779                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 780
 781                         if ($dissolve) {
 782                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 783                         }
 784                 }
 785         }
 786
 787         /**
 788          * Marks a contact for archival after a communication issue delay
 789          *
 790          * Contact has refused to recognise us as a friend. We will start a countdown.
 791          * If they still don't recognise us in 32 days, the relationship is over,
 792          * and we won't waste any more time trying to communicate with them.
 793          * This provides for the possibility that their database is temporarily messed
 794          * up or some other transient event and that there's a possibility we could recover from it.
 795          *
 796          * @param array $contact contact to mark for archival
 797          * @return null
 798          * @throws HTTPException\InternalServerErrorException
 799          */
 800         public static function markForArchival(array $contact)
 801         {
 802                 if (!isset($contact['url']) && !empty($contact['id'])) {
 803                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 804                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 805                         if (!DBA::isResult($contact)) {
 806                                 return;
 807                         }
 808                 } elseif (!isset($contact['url'])) {
 809                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 810                 }
 811
 812                 Logger::info('Contact is marked for archival', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 813
 814                 // Contact already archived or "self" contact? => nothing to do
 815                 if ($contact['archive'] || $contact['self']) {
 816                         return;
 817                 }
 818
 819                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 820                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 821                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 822                 } else {
 823                         /* @todo
 824                          * We really should send a notification to the owner after 2-3 weeks
 825                          * so they won't be surprised when the contact vanishes and can take
 826                          * remedial action if this was a serious mistake or glitch
 827                          */
 828
 829                         /// @todo Check for contact vitality via probing
 830                         $archival_days = DI::config()->get('system', 'archival_days', 32);
 831
 832                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
 833                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
 834                                 /* Relationship is really truly dead. archive them rather than
 835                                  * delete, though if the owner tries to unarchive them we'll start
 836                                  * the whole process over again.
 837                                  */
 838                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
 839                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 840                         }
 841                 }
 842         }
 843
 844         /**
 845          * Cancels the archival countdown
 846          *
 847          * @see   Contact::markForArchival()
 848          *
 849          * @param array $contact contact to be unmarked for archival
 850          * @return null
 851          * @throws \Exception
 852          */
 853         public static function unmarkForArchival(array $contact)
 854         {
 855                 // Always unarchive the relay contact entry
 856                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
 857                         $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 858                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
 859                         if (!DBA::exists('contact', array_merge($condition, $fields))) {
 860                                 DBA::update('contact', $fields, $condition);
 861                         }
 862                 }
 863
 864                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 865                 $exists = DBA::exists('contact', $condition);
 866
 867                 // We don't need to update, we never marked this contact for archival
 868                 if (!$exists) {
 869                         return;
 870                 }
 871
 872                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 873
 874                 if (!isset($contact['url']) && !empty($contact['id'])) {
 875                         $fields = ['id', 'url', 'batch'];
 876                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 877                         if (!DBA::isResult($contact)) {
 878                                 return;
 879                         }
 880                 }
 881
 882                 // It's a miracle. Our dead contact has inexplicably come back to life.
 883                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 884                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 885                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 886         }
 887
 888         /**
 889          * Returns the data array for the photo menu of a given contact
 890          *
 891          * @param array $contact contact
 892          * @param int   $uid     optional, default 0
 893          * @return array
 894          * @throws HTTPException\InternalServerErrorException
 895          * @throws \ImagickException
 896          */
 897         public static function photoMenu(array $contact, $uid = 0)
 898         {
 899                 $pm_url = '';
 900                 $status_link = '';
 901                 $photos_link = '';
 902                 $contact_drop_link = '';
 903                 $poke_link = '';
 904
 905                 if ($uid == 0) {
 906                         $uid = local_user();
 907                 }
 908
 909                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 910                         if ($uid == 0) {
 911                                 $profile_link = self::magicLinkByContact($contact);
 912                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 913
 914                                 return $menu;
 915                         }
 916
 917                         // Look for our own contact if the uid doesn't match and isn't public
 918                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 919                         if (DBA::isResult($contact_own)) {
 920                                 return self::photoMenu($contact_own, $uid);
 921                         }
 922                 }
 923
 924                 $sparkle = false;
 925                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 926                         $sparkle = true;
 927                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 928                 } else {
 929                         $profile_link = $contact['url'];
 930                 }
 931
 932                 if ($profile_link === 'mailbox') {
 933                         $profile_link = '';
 934                 }
 935
 936                 if ($sparkle) {
 937                         $status_link = $profile_link . '/status';
 938                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 939                         $profile_link = $profile_link . '/profile';
 940                 }
 941
 942                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 943                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 944                 }
 945
 946                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 947                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 948                 }
 949
 950                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 951
 952                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 953
 954                 if (!$contact['self']) {
 955                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 956                 }
 957
 958                 $follow_link = '';
 959                 $unfollow_link = '';
 960                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 961                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 962                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
 963                         } elseif(!$contact['pending']) {
 964                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
 965                         }
 966                 }
 967
 968                 if (!empty($follow_link) || !empty($unfollow_link)) {
 969                         $contact_drop_link = '';
 970                 }
 971
 972                 /**
 973                  * Menu array:
 974                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 975                  */
 976                 if (empty($contact['uid'])) {
 977                         $menu = [
 978                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
 979                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
 980                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
 981                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
 982                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
 983                         ];
 984                 } else {
 985                         $menu = [
 986                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
 987                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
 988                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
 989                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
 990                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
 991                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
 992                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
 993                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
 994                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
 995                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
 996                         ];
 997
 998                         if (!empty($contact['pending'])) {
 999                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1000                                 if (DBA::isResult($intro)) {
1001                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1002                                 }
1003                         }
1004                 }
1005
1006                 $args = ['contact' => $contact, 'menu' => &$menu];
1007
1008                 Hook::callAll('contact_photo_menu', $args);
1009
1010                 $menucondensed = [];
1011
1012                 foreach ($menu as $menuname => $menuitem) {
1013                         if ($menuitem[1] != '') {
1014                                 $menucondensed[$menuname] = $menuitem;
1015                         }
1016                 }
1017
1018                 return $menucondensed;
1019         }
1020
1021         /**
1022          * Fetch the contact id for a given URL and user
1023          *
1024          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1025          * `addr` or `alias`.
1026          *
1027          * If there's no record and we aren't looking for a public contact, we quit.
1028          * If there's one, we check that it isn't time to update the picture else we
1029          * directly return the found contact id.
1030          *
1031          * Second, we probe the provided $url whether it's http://server.tld/profile or
1032          * nick@server.tld. We quit if we can't get any info back.
1033          *
1034          * Third, we create the contact record if it doesn't exist
1035          *
1036          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1037          * if there's any updates
1038          *
1039          * @param string  $url       Contact URL
1040          * @param integer $uid       The user id for the contact (0 = public contact)
1041          * @param boolean $update    true = always update, false = never update, null = update when not found
1042          * @param array   $default   Default value for creating the contact when everything else fails
1043          *
1044          * @return integer Contact ID
1045          * @throws HTTPException\InternalServerErrorException
1046          * @throws \ImagickException
1047          */
1048         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1049         {
1050                 $contact_id = 0;
1051
1052                 if ($url == '') {
1053                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1054                         return 0;
1055                 }
1056
1057                 $contact = self::getByURL($url, false, ['id', 'network'], $uid);
1058
1059                 if (!empty($contact)) {
1060                         $contact_id = $contact["id"];
1061
1062                         if (empty($update)) {
1063                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1064                                 return $contact_id;
1065                         }
1066                 } elseif ($uid != 0) {
1067                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1068                         return 0;
1069                 } elseif (empty($default) && !is_null($update) && !$update) {
1070                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1071                         return 0;
1072                 }
1073
1074                 $data = [];
1075
1076                 if (empty($default['network']) || $update) {
1077                         $data = Probe::uri($url, "", $uid);
1078
1079                         // Take the default values when probing failed
1080                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1081                                 $data = array_merge($data, $default);
1082                         }
1083                 } elseif (!empty($default['network'])) {
1084                         $data = $default;
1085                 }
1086
1087                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1088                         // Fetch data for the public contact via the first found personal contact
1089                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1090                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'contact-type',
1091                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1092                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1093
1094                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1095                         if (!DBA::isResult($personal_contact)) {
1096                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1097                         }
1098
1099                         if (DBA::isResult($personal_contact)) {
1100                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1101                                 $data = $personal_contact;
1102                                 $data['photo'] = $personal_contact['avatar'];
1103                                 $data['account-type'] = $personal_contact['contact-type'];
1104                                 $data['hide'] = $personal_contact['unsearchable'];
1105                                 unset($data['avatar']);
1106                                 unset($data['contact-type']);
1107                                 unset($data['unsearchable']);
1108                         }
1109                 }
1110
1111                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1112                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1113                         return 0;
1114                 }
1115
1116                 if (!$contact_id) {
1117                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1118                         if (!empty($data['alias'])) {
1119                                 $urls[] = Strings::normaliseLink($data['alias']);
1120                         }
1121                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1122                         if (!empty($contact['id'])) {
1123                                 $contact_id = $contact['id'];
1124                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1125                         }
1126                 }
1127
1128                 if (!$contact_id) {
1129                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1130                         $fields = [
1131                                 'uid'       => $uid,
1132                                 'url'       => $data['url'],
1133                                 'nurl'      => Strings::normaliseLink($data['url']),
1134                                 'network'   => $data['network'],
1135                                 'created'   => DateTimeFormat::utcNow(),
1136                                 'rel'       => self::SHARING,
1137                                 'writable'  => 1,
1138                                 'blocked'   => 0,
1139                                 'readonly'  => 0,
1140                                 'pending'   => 0];
1141
1142                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1143
1144                         // Before inserting we do check if the entry does exist now.
1145                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1146                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1147                                 if (DBA::isResult($contact)) {
1148                                         $contact_id = $contact['id'];
1149                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1150                                 } else {
1151                                         DBA::insert('contact', $fields);
1152                                         $contact_id = DBA::lastInsertId();
1153                                         if ($contact_id) {
1154                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1155                                         }
1156                                 }
1157                                 DI::lock()->release(self::LOCK_INSERT);
1158                         } else {
1159                                 Logger::warning('Contact lock had not been acquired');
1160                         }
1161
1162                         if (!$contact_id) {
1163                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1164                                 return 0;
1165                         }
1166                 } else {
1167                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1168                 }
1169
1170                 self::updateFromProbeArray($contact_id, $data);
1171
1172                 // Don't return a number for a deleted account
1173                 if (!empty($data['account-type']) && $data['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1174                         Logger::info('Contact is a tombstone', ['url' => $url, 'uid' => $uid]);
1175                         return 0;
1176                 }
1177
1178                 return $contact_id;
1179         }
1180
1181         /**
1182          * Checks if the contact is archived
1183          *
1184          * @param int $cid contact id
1185          *
1186          * @return boolean Is the contact archived?
1187          * @throws HTTPException\InternalServerErrorException
1188          */
1189         public static function isArchived(int $cid)
1190         {
1191                 if ($cid == 0) {
1192                         return false;
1193                 }
1194
1195                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1196                 if (!DBA::isResult($contact)) {
1197                         return false;
1198                 }
1199
1200                 if ($contact['archive']) {
1201                         return true;
1202                 }
1203
1204                 // Check status of ActivityPub endpoints
1205                 $apcontact = APContact::getByURL($contact['url'], false);
1206                 if (!empty($apcontact)) {
1207                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1208                                 return true;
1209                         }
1210
1211                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1212                                 return true;
1213                         }
1214                 }
1215
1216                 // Check status of Diaspora endpoints
1217                 if (!empty($contact['batch'])) {
1218                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1219                         return DBA::exists('contact', $condition);
1220                 }
1221
1222                 return false;
1223         }
1224
1225         /**
1226          * Checks if the contact is blocked
1227          *
1228          * @param int $cid contact id
1229          *
1230          * @return boolean Is the contact blocked?
1231          * @throws HTTPException\InternalServerErrorException
1232          */
1233         public static function isBlocked($cid)
1234         {
1235                 if ($cid == 0) {
1236                         return false;
1237                 }
1238
1239                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1240                 if (!DBA::isResult($blocked)) {
1241                         return false;
1242                 }
1243
1244                 if (Network::isUrlBlocked($blocked['url'])) {
1245                         return true;
1246                 }
1247
1248                 return (bool) $blocked['blocked'];
1249         }
1250
1251         /**
1252          * Checks if the contact is hidden
1253          *
1254          * @param int $cid contact id
1255          *
1256          * @return boolean Is the contact hidden?
1257          * @throws \Exception
1258          */
1259         public static function isHidden($cid)
1260         {
1261                 if ($cid == 0) {
1262                         return false;
1263                 }
1264
1265                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1266                 if (!DBA::isResult($hidden)) {
1267                         return false;
1268                 }
1269                 return (bool) $hidden['hidden'];
1270         }
1271
1272         /**
1273          * Returns posts from a given contact url
1274          *
1275          * @param string $contact_url Contact URL
1276          * @param bool   $thread_mode
1277          * @param int    $update      Update mode
1278          * @param int    $parent      Item parent ID for the update mode
1279          * @return string posts in HTML
1280          * @throws \Exception
1281          */
1282         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1283         {
1284                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1285         }
1286
1287         /**
1288          * Returns posts from a given contact id
1289          *
1290          * @param int  $cid         Contact ID
1291          * @param bool $thread_mode
1292          * @param int  $update      Update mode
1293          * @param int  $parent     Item parent ID for the update mode
1294          * @return string posts in HTML
1295          * @throws \Exception
1296          */
1297         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1298         {
1299                 $a = DI::app();
1300
1301                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1302                 if (!DBA::isResult($contact)) {
1303                         return '';
1304                 }
1305
1306                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1307                         $sql = "(`uid` = 0 OR (`uid` = ? AND NOT `global`))";
1308                 } else {
1309                         $sql = "`uid` = ?";
1310                 }
1311
1312                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1313
1314                 if ($thread_mode) {
1315                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1316                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1317                 } else {
1318                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1319                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1320                 }
1321
1322                 if (!empty($parent)) {
1323                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1324                 } else {
1325                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1326                         if (!empty($last_received)) {
1327                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1328                         }
1329                 }
1330
1331                 if (DI::mode()->isMobile()) {
1332                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1333                                 DI::config()->get('system', 'itemspage_network_mobile'));
1334                 } else {
1335                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1336                                 DI::config()->get('system', 'itemspage_network'));
1337                 }
1338
1339                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1340
1341                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1342
1343                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1344                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1345                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1346                 } else {
1347                         $o = '';
1348                 }
1349
1350                 if ($thread_mode) {
1351                         $items = Post::toArray(Post::selectForUser(local_user(), ['uri-id', 'gravity', 'parent-uri-id', 'thr-parent-id', 'author-id'], $condition, $params));
1352
1353                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1354                 } else {
1355                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
1356
1357                         $o .= conversation($a, $items, 'contact-posts', $update);
1358                 }
1359
1360                 if (!$update) {
1361                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1362                                 $o .= HTML::scrollLoader();
1363                         } else {
1364                                 $o .= $pager->renderMinimal(count($items));
1365                         }
1366                 }
1367
1368                 return $o;
1369         }
1370
1371         /**
1372          * Returns the account type name
1373          *
1374          * The function can be called with either the user or the contact array
1375          *
1376          * @param array $contact contact or user array
1377          * @return string
1378          */
1379         public static function getAccountType(array $contact)
1380         {
1381                 // There are several fields that indicate that the contact or user is a forum
1382                 // "page-flags" is a field in the user table,
1383                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1384                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1385                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1386                         || (isset($contact['forum']) && intval($contact['forum']))
1387                         || (isset($contact['prv']) && intval($contact['prv']))
1388                         || (isset($contact['community']) && intval($contact['community']))
1389                 ) {
1390                         $type = self::TYPE_COMMUNITY;
1391                 } else {
1392                         $type = self::TYPE_PERSON;
1393                 }
1394
1395                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1396                 if (isset($contact["contact-type"])) {
1397                         $type = $contact["contact-type"];
1398                 }
1399
1400                 if (isset($contact["account-type"])) {
1401                         $type = $contact["account-type"];
1402                 }
1403
1404                 switch ($type) {
1405                         case self::TYPE_ORGANISATION:
1406                                 $account_type = DI::l10n()->t("Organisation");
1407                                 break;
1408
1409                         case self::TYPE_NEWS:
1410                                 $account_type = DI::l10n()->t('News');
1411                                 break;
1412
1413                         case self::TYPE_COMMUNITY:
1414                                 $account_type = DI::l10n()->t("Forum");
1415                                 break;
1416
1417                         default:
1418                                 $account_type = "";
1419                                 break;
1420                 }
1421
1422                 return $account_type;
1423         }
1424
1425         /**
1426          * Blocks a contact
1427          *
1428          * @param int $cid
1429          * @return bool
1430          * @throws \Exception
1431          */
1432         public static function block($cid, $reason = null)
1433         {
1434                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1435
1436                 return $return;
1437         }
1438
1439         /**
1440          * Unblocks a contact
1441          *
1442          * @param int $cid
1443          * @return bool
1444          * @throws \Exception
1445          */
1446         public static function unblock($cid)
1447         {
1448                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1449
1450                 return $return;
1451         }
1452
1453         /**
1454          * Ensure that cached avatar exist
1455          *
1456          * @param integer $cid
1457          */
1458         public static function checkAvatarCache(int $cid)
1459         {
1460                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1461                 if (!DBA::isResult($contact)) {
1462                         return;
1463                 }
1464
1465                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1466                         return;
1467                 }
1468
1469                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1470
1471                 self::updateAvatar($cid, $contact['avatar'], true);
1472         }
1473
1474         /**
1475          * Return the photo path for a given contact array in the given size
1476          *
1477          * @param array $contact    contact array
1478          * @param string $field     Fieldname of the photo in the contact array
1479          * @param string $size      Size of the avatar picture
1480          * @param string $avatar    Avatar path that is displayed when no photo had been found
1481          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1482          * @return string photo path
1483          */
1484         private static function getAvatarPath(array $contact, string $field, string $size, string $avatar, $no_update = false)
1485         {
1486                 if (!empty($contact)) {
1487                         $contact = self::checkAvatarCacheByArray($contact, $no_update);
1488                         if (!empty($contact[$field])) {
1489                                 $avatar = $contact[$field];
1490                         }
1491                 }
1492
1493                 if ($no_update && empty($avatar) && !empty($contact['avatar'])) {
1494                         $avatar = $contact['avatar'];
1495                 }
1496
1497                 if (empty($avatar)) {
1498                         $avatar = self::getDefaultAvatar([], $size);
1499                 }
1500
1501                 if (Proxy::isLocalImage($avatar)) {
1502                         return $avatar;
1503                 } else {
1504                         return Proxy::proxifyUrl($avatar, false, $size);
1505                 }
1506         }
1507
1508         /**
1509          * Return the photo path for a given contact array
1510          *
1511          * @param array  $contact   Contact array
1512          * @param string $avatar    Avatar path that is displayed when no photo had been found
1513          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1514          * @return string photo path
1515          */
1516         public static function getPhoto(array $contact, string $avatar = '', bool $no_update = false)
1517         {
1518                 return self::getAvatarPath($contact, 'photo', Proxy::SIZE_SMALL, $avatar, $no_update);
1519         }
1520
1521         /**
1522          * Return the photo path (thumb size) for a given contact array
1523          *
1524          * @param array  $contact   Contact array
1525          * @param string $avatar    Avatar path that is displayed when no photo had been found
1526          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1527          * @return string photo path
1528          */
1529         public static function getThumb(array $contact, string $avatar = '', bool $no_update = false)
1530         {
1531                 return self::getAvatarPath($contact, 'thumb', Proxy::SIZE_THUMB, $avatar, $no_update);
1532         }
1533
1534         /**
1535          * Return the photo path (micro size) for a given contact array
1536          *
1537          * @param array  $contact   Contact array
1538          * @param string $avatar    Avatar path that is displayed when no photo had been found
1539          * @param bool   $no_update Don't perfom an update if no cached avatar was found
1540          * @return string photo path
1541          */
1542         public static function getMicro(array $contact, string $avatar = '', bool $no_update = false)
1543         {
1544                 return self::getAvatarPath($contact, 'micro', Proxy::SIZE_MICRO, $avatar, $no_update);
1545         }
1546
1547         /**
1548          * Check the given contact array for avatar cache fields
1549          *
1550          * @param array $contact
1551          * @param bool  $no_update Don't perfom an update if no cached avatar was found
1552          * @return array contact array with avatar cache fields
1553          */
1554         private static function checkAvatarCacheByArray(array $contact, bool $no_update = false)
1555         {
1556                 $update = false;
1557                 $contact_fields = [];
1558                 $fields = ['photo', 'thumb', 'micro'];
1559                 foreach ($fields as $field) {
1560                         if (isset($contact[$field])) {
1561                                 $contact_fields[] = $field;
1562                         }
1563                         if (isset($contact[$field]) && empty($contact[$field])) {
1564                                 $update = true;
1565                         }
1566                 }
1567
1568                 if (!$update || $no_update) {
1569                         return $contact;
1570                 }
1571
1572                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1573                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1574
1575                         $new_contact = self::getById($contact['id'], $contact_fields);
1576                         if (DBA::isResult($new_contact)) {
1577                                 // We only update the cache fields
1578                                 $contact = array_merge($contact, $new_contact);
1579                         }
1580                 }
1581
1582                 /// add the default avatars if the fields aren't filled
1583                 if (isset($contact['photo']) && empty($contact['photo'])) {
1584                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1585                 }
1586                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1587                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1588                 }
1589                 if (isset($contact['micro']) && empty($contact['micro'])) {
1590                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1591                 }
1592
1593                 return $contact;
1594         }
1595
1596         /**
1597          * Fetch the default avatar for the given contact and size
1598          *
1599          * @param array $contact  contact array
1600          * @param string $size    Size of the avatar picture
1601          * @return void
1602          */
1603         public static function getDefaultAvatar(array $contact, string $size)
1604         {
1605                 switch ($size) {
1606                         case Proxy::SIZE_MICRO:
1607                                 $avatar['size'] = 48;
1608                                 $default = self::DEFAULT_AVATAR_MICRO;
1609                                 break;
1610
1611                         case Proxy::SIZE_THUMB:
1612                                 $avatar['size'] = 80;
1613                                 $default = self::DEFAULT_AVATAR_THUMB;
1614                                 break;
1615
1616                         case Proxy::SIZE_SMALL:
1617                         default:
1618                                 $avatar['size'] = 300;
1619                                 $default = self::DEFAULT_AVATAR_PHOTO;
1620                                 break;
1621                 }
1622
1623                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1624                         return DI::baseUrl() . $default;
1625                 }
1626
1627                 if (!empty($contact['xmpp'])) {
1628                         $avatar['email'] = $contact['xmpp'];
1629                 } elseif (!empty($contact['addr'])) {
1630                         $avatar['email'] = $contact['addr'];
1631                 } elseif (!empty($contact['url'])) {
1632                         $avatar['email'] = $contact['url'];
1633                 } else {
1634                         return DI::baseUrl() . $default;
1635                 }
1636
1637                 $avatar['url'] = '';
1638                 $avatar['success'] = false;
1639
1640                 Hook::callAll('avatar_lookup', $avatar);
1641
1642                 if ($avatar['success'] && !empty($avatar['url'])) {
1643                         return $avatar['url'];
1644                 }
1645
1646                 return DI::baseUrl() . $default;
1647         }
1648
1649         /**
1650          * Updates the avatar links in a contact only if needed
1651          *
1652          * @param int    $cid          Contact id
1653          * @param string $avatar       Link to avatar picture
1654          * @param bool   $force        force picture update
1655          * @param bool   $create_cache Enforces the creation of cached avatar fields
1656          *
1657          * @return void
1658          * @throws HTTPException\InternalServerErrorException
1659          * @throws HTTPException\NotFoundException
1660          * @throws \ImagickException
1661          */
1662         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1663         {
1664                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1665                         ['id' => $cid, 'self' => false]);
1666                 if (!DBA::isResult($contact)) {
1667                         return;
1668                 }
1669
1670                 $uid = $contact['uid'];
1671
1672                 // Only update the cached photo links of public contacts when they already are cached
1673                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1674                         if ($contact['avatar'] != $avatar) {
1675                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1676                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1677                         }
1678                         return;
1679                 }
1680
1681                 // User contacts use are updated through the public contacts
1682                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1683                         $pcid = self::getIdForURL($contact['url'], false);
1684                         if (!empty($pcid)) {
1685                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1686                                 self::updateAvatar($pcid, $avatar, $force, true);
1687                                 return;
1688                         }
1689                 }
1690
1691                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1692
1693                 if ($default_avatar) {
1694                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1695                 }
1696
1697                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1698                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1699                                 'photo' => $avatar,
1700                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1701                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1702                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1703                 }
1704
1705                 // Use the data from the self account
1706                 if (empty($fields)) {
1707                         $local_uid = User::getIdForURL($contact['url']);
1708                         if (!empty($local_uid)) {
1709                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1710                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1711                         }
1712                 }
1713
1714                 if (empty($fields)) {
1715                         $update = ($contact['avatar'] != $avatar) || $force;
1716
1717                         if (!$update) {
1718                                 $data = [
1719                                         $contact['photo'] ?? '',
1720                                         $contact['thumb'] ?? '',
1721                                         $contact['micro'] ?? '',
1722                                 ];
1723
1724                                 foreach ($data as $image_uri) {
1725                                         $image_rid = Photo::ridFromURI($image_uri);
1726                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1727                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1728                                                 $update = true;
1729                                         }
1730                                 }
1731                         }
1732
1733                         if ($update) {
1734                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1735                                 if ($photos) {
1736                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1737                                         $update = !empty($fields);
1738                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1739                                 } else {
1740                                         $update = false;
1741                                 }
1742                         }
1743                 } else {
1744                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1745                 }
1746
1747                 if (!$update) {
1748                         return;
1749                 }
1750
1751                 $cids = [];
1752                 $uids = [];
1753                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1754                         // Collect all user contacts of the given public contact
1755                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1756                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1757                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1758                                 $cids[] = $personal_contact['id'];
1759                                 $uids[] = $personal_contact['uid'];
1760                         }
1761                         DBA::close($personal_contacts);
1762
1763                         if (!empty($cids)) {
1764                                 // Delete possibly existing cached user contact avatars
1765                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1766                         }
1767                 }
1768
1769                 $cids[] = $cid;
1770                 $uids[] = $uid;
1771                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1772                 DBA::update('contact', $fields, ['id' => $cids]);
1773         }
1774
1775         public static function deleteContactByUrl(string $url)
1776         {
1777                 // Update contact data for all users
1778                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1779                 $contacts = DBA::select('contact', ['id', 'uid'], $condition);
1780                 while ($contact = DBA::fetch($contacts)) {
1781                         Logger::info('Deleting contact', ['id' => $contact['id'], 'uid' => $contact['uid'], 'url' => $url]);
1782                         self::remove($contact['id']);
1783                 }
1784         }
1785
1786         /**
1787          * Helper function for "updateFromProbe". Updates personal and public contact
1788          *
1789          * @param integer $id      contact id
1790          * @param integer $uid     user id
1791          * @param string  $old_url The previous profile URL of the contact
1792          * @param string  $new_url The profile URL of the contact
1793          * @param array   $fields  The fields that are updated
1794          *
1795          * @throws \Exception
1796          */
1797         private static function updateContact(int $id, int $uid, string $old_url, string $new_url, array $fields)
1798         {
1799                 if (Strings::normaliseLink($new_url) != Strings::normaliseLink($old_url)) {
1800                         Logger::notice('New URL differs from old URL', ['old' => $old_url, 'new' => $new_url]);
1801                         // @todo It is to decide what to do when the URL is changed
1802                 }
1803
1804                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1805                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1806                         return;
1807                 }
1808
1809                 // Search for duplicated contacts and get rid of them
1810                 if (self::removeDuplicates(Strings::normaliseLink($new_url), $uid)) {
1811                         return;
1812                 }
1813
1814                 // Archive or unarchive the contact.
1815                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1816                 if (!DBA::isResult($contact)) {
1817                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1818                         return;
1819                 }
1820
1821                 if (isset($fields['failed'])) {
1822                         if ($fields['failed']) {
1823                                 self::markForArchival($contact);
1824                         } else {
1825                                 self::unmarkForArchival($contact);
1826                         }
1827                 }
1828
1829                 if ($contact['uid'] != 0) {
1830                         return;
1831                 }
1832
1833                 // Update contact data for all users
1834                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($old_url)];
1835
1836                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1837                 DBA::update('contact', $fields, $condition);
1838
1839                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1840                 $condition['network'] = Protocol::OSTATUS;
1841
1842                 // If the contact failed, propagate the update fields to all contacts
1843                 if (empty($fields['failed'])) {
1844                         unset($fields['last-update']);
1845                         unset($fields['success_update']);
1846                         unset($fields['failure_update']);
1847                 }
1848
1849                 if (empty($fields)) {
1850                         return;
1851                 }
1852
1853                 DBA::update('contact', $fields, $condition);
1854         }
1855
1856         /**
1857          * Remove duplicated contacts
1858          *
1859          * @param string  $nurl  Normalised contact url
1860          * @param integer $uid   User id
1861          * @return boolean
1862          * @throws \Exception
1863          */
1864         public static function removeDuplicates(string $nurl, int $uid)
1865         {
1866                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1867                 $count = DBA::count('contact', $condition);
1868                 if ($count <= 1) {
1869                         return false;
1870                 }
1871
1872                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1873                 if (!DBA::isResult($first_contact)) {
1874                         // Shouldn't happen - so we handle it
1875                         return false;
1876                 }
1877
1878                 $first = $first_contact['id'];
1879                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1880                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1881                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1882                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1883                         return false;
1884                 }
1885
1886                 // Find all duplicates
1887                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1888                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1889                 while ($duplicate = DBA::fetch($duplicates)) {
1890                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1891                                 continue;
1892                         }
1893
1894                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1895                 }
1896                 DBA::close($duplicates);
1897                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl, 'callstack' => System::callstack(20)]);
1898                 return true;
1899         }
1900
1901         /**
1902          * @param integer $id      contact id
1903          * @param string  $network Optional network we are probing for
1904          * @return boolean
1905          * @throws HTTPException\InternalServerErrorException
1906          * @throws \ImagickException
1907          */
1908         public static function updateFromProbe(int $id, string $network = '')
1909         {
1910                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
1911                 if (!DBA::isResult($contact)) {
1912                         return false;
1913                 }
1914
1915                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
1916                 return self::updateFromProbeArray($id, $ret);
1917         }
1918
1919         /**
1920          * @param integer $id      contact id
1921          * @param array   $ret     Probed data
1922          * @return boolean
1923          * @throws HTTPException\InternalServerErrorException
1924          * @throws \ImagickException
1925          */
1926         private static function updateFromProbeArray(int $id, array $ret)
1927         {
1928                 /*
1929                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
1930                   This will reliably kill your communication with old Friendica contacts.
1931                  */
1932
1933                 // These fields aren't updated by this routine:
1934                 // 'xmpp', 'sensitive'
1935
1936                 $fields = ['uid', 'avatar', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe', 'manually-approve',
1937                         'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
1938                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
1939                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
1940                 if (!DBA::isResult($contact)) {
1941                         return false;
1942                 }
1943
1944                 if (!empty($ret['account-type']) && $ret['account-type'] == User::ACCOUNT_TYPE_DELETED) {
1945                         Logger::info('Deleted account', ['id' => $id, 'url' => $ret['url'], 'ret' => $ret]);
1946                         self::remove($id);
1947
1948                         // Delete all contacts with the same URL
1949                         self::deleteContactByUrl($ret['url']);
1950                         return true;
1951                 }
1952
1953                 $uid = $contact['uid'];
1954                 unset($contact['uid']);
1955
1956                 $pubkey = $contact['pubkey'];
1957                 unset($contact['pubkey']);
1958
1959                 $contact['photo'] = $contact['avatar'];
1960                 unset($contact['avatar']);
1961
1962                 $updated = DateTimeFormat::utcNow();
1963
1964                 // We must not try to update relay contacts via probe. They are no real contacts.
1965                 // We check after the probing to be able to correct falsely detected contact types.
1966                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
1967                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
1968                         self::updateContact($id, $uid, $contact['url'], $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
1969                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
1970                         return true;
1971                 }
1972
1973                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
1974                 if (($ret['network'] == Protocol::PHANTOM) || (($ret['network'] == Protocol::FEED) && ($ret['network'] != $contact['network']))) {
1975                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
1976                         return false;
1977                 }
1978
1979                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
1980                         $ret['unsearchable'] = $ret['hide'];
1981                 }
1982
1983                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
1984                         $ret['forum'] = false;
1985                         $ret['prv'] = false;
1986                         $ret['contact-type'] = $ret['account-type'];
1987                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
1988                                 $ret['forum'] = (bool)!$ret['manually-approve'];
1989                                 $ret['prv'] = (bool)!$ret['forum'];
1990                         }
1991                 }
1992
1993                 $new_pubkey = $ret['pubkey'] ?? '';
1994
1995                 if ($uid == 0) {
1996                         $ret['last-item'] = Probe::getLastUpdate($ret);
1997                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
1998                 }
1999
2000                 $update = false;
2001
2002                 // make sure to not overwrite existing values with blank entries except some technical fields
2003                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2004                 foreach ($ret as $key => $val) {
2005                         if (!array_key_exists($key, $contact)) {
2006                                 unset($ret[$key]);
2007                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2008                                 $ret[$key] = $contact[$key];
2009                         } elseif ($ret[$key] != $contact[$key]) {
2010                                 $update = true;
2011                         }
2012                 }
2013
2014                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
2015                         $update = true;
2016                 } else {
2017                         unset($ret['last-item']);
2018                 }
2019
2020                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2021                         self::updateAvatar($id, $ret['photo'], $update);
2022                 }
2023
2024                 if (!$update) {
2025                         self::updateContact($id, $uid, $contact['url'], $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
2026
2027                         if (Contact\Relation::isDiscoverable($ret['url'])) {
2028                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2029                         }
2030
2031                         // Update the public contact
2032                         if ($uid != 0) {
2033                                 $contact = self::getByURL($ret['url'], false, ['id']);
2034                                 if (!empty($contact['id'])) {
2035                                         self::updateFromProbeArray($contact['id'], $ret);
2036                                 }
2037                         }
2038
2039                         return true;
2040                 }
2041
2042                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2043                 $ret['updated'] = $updated;
2044                 $ret['failed'] = false;
2045
2046                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2047                 if (empty($pubkey) && !empty($new_pubkey)) {
2048                         $ret['pubkey'] = $new_pubkey;
2049                 }
2050
2051                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2052                         $ret['uri-date'] = DateTimeFormat::utcNow();
2053                 }
2054
2055                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2056                         $ret['name-date'] = $updated;
2057                 }
2058
2059                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2060                         $ret['last-update'] = $updated;
2061                         $ret['success_update'] = $updated;
2062                 }
2063
2064                 unset($ret['photo']);
2065
2066                 self::updateContact($id, $uid, $contact['url'], $ret['url'], $ret);
2067
2068                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2069                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2070                 }
2071
2072                 return true;
2073         }
2074
2075         /**
2076          * @param integer $url contact url
2077          * @return integer Contact id
2078          * @throws HTTPException\InternalServerErrorException
2079          * @throws \ImagickException
2080          */
2081         public static function updateFromProbeByURL($url)
2082         {
2083                 $id = self::getIdForURL($url);
2084
2085                 if (empty($id)) {
2086                         return $id;
2087                 }
2088
2089                 self::updateFromProbe($id);
2090
2091                 return $id;
2092         }
2093
2094         /**
2095          * Detects if a given contact array belongs to a legacy DFRN connection
2096          *
2097          * @param array $contact
2098          * @return boolean
2099          */
2100         public static function isLegacyDFRNContact($contact)
2101         {
2102                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2103                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2104         }
2105
2106         /**
2107          * Detects the communication protocol for a given contact url.
2108          * This is used to detect Friendica contacts that we can communicate via AP.
2109          *
2110          * @param string $url contact url
2111          * @param string $network Network of that contact
2112          * @return string with protocol
2113          */
2114         public static function getProtocol($url, $network)
2115         {
2116                 if ($network != Protocol::DFRN) {
2117                         return $network;
2118                 }
2119
2120                 $apcontact = APContact::getByURL($url);
2121                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2122                         return Protocol::ACTIVITYPUB;
2123                 } else {
2124                         return $network;
2125                 }
2126         }
2127
2128         /**
2129          * Takes a $uid and a url/handle and adds a new contact
2130          *
2131          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2132          * dfrn_request page.
2133          *
2134          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2135          *
2136          * Returns an array
2137          * $return['success'] boolean true if successful
2138          * $return['message'] error text if success is false.
2139          *
2140          * Takes a $uid and a url/handle and adds a new contact
2141          *
2142          * @param array  $user        The user the contact should be created for
2143          * @param string $url         The profile URL of the contact
2144          * @param bool   $interactive
2145          * @param string $network
2146          * @return array
2147          * @throws HTTPException\InternalServerErrorException
2148          * @throws HTTPException\NotFoundException
2149          * @throws \ImagickException
2150          */
2151         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2152         {
2153                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2154
2155                 // remove ajax junk, e.g. Twitter
2156                 $url = str_replace('/#!/', '/', $url);
2157
2158                 if (!Network::isUrlAllowed($url)) {
2159                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2160                         return $result;
2161                 }
2162
2163                 if (Network::isUrlBlocked($url)) {
2164                         $result['message'] = DI::l10n()->t('Blocked domain');
2165                         return $result;
2166                 }
2167
2168                 if (!$url) {
2169                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2170                         return $result;
2171                 }
2172
2173                 $arr = ['url' => $url, 'contact' => []];
2174
2175                 Hook::callAll('follow', $arr);
2176
2177                 if (empty($arr)) {
2178                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2179                         return $result;
2180                 }
2181
2182                 if (!empty($arr['contact']['name'])) {
2183                         $ret = $arr['contact'];
2184                 } else {
2185                         $ret = Probe::uri($url, $network, $user['uid']);
2186                 }
2187
2188                 if (($network != '') && ($ret['network'] != $network)) {
2189                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2190                         return $result;
2191                 }
2192
2193                 // check if we already have a contact
2194                 // the poll url is more reliable than the profile url, as we may have
2195                 // indirect links or webfinger links
2196
2197                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2198                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2199                 if (!DBA::isResult($contact)) {
2200                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2201                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2202                 }
2203
2204                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2205
2206                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2207                         if ($interactive) {
2208                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2209                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2210                                 } else {
2211                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2212                                 }
2213
2214                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2215
2216                                 // NOTREACHED
2217                         }
2218                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2219                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2220                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2221                         return $result;
2222                 }
2223
2224                 // This extra param just confuses things, remove it
2225                 if ($protocol === Protocol::DIASPORA) {
2226                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2227                 }
2228
2229                 // do we have enough information?
2230                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2231                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2232                         if (empty($ret['poll'])) {
2233                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2234                         }
2235                         if (empty($ret['name'])) {
2236                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2237                         }
2238                         if (empty($ret['url'])) {
2239                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2240                         }
2241                         if (strpos($ret['url'], '@') !== false) {
2242                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2243                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2244                         }
2245                         return $result;
2246                 }
2247
2248                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2249                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2250                         $ret['notify'] = '';
2251                 }
2252
2253                 if (!$ret['notify']) {
2254                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2255                 }
2256
2257                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2258
2259                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2260
2261                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2262
2263                 $pending = false;
2264                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2265                         $pending = (bool)$ret['manually-approve'];
2266                 }
2267
2268                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2269                         $writeable = 1;
2270                 }
2271
2272                 if (DBA::isResult($contact)) {
2273                         // update contact
2274                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2275
2276                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2277                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2278                 } else {
2279                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2280
2281                         // create contact record
2282                         self::insert([
2283                                 'uid'     => $user['uid'],
2284                                 'created' => DateTimeFormat::utcNow(),
2285                                 'url'     => $ret['url'],
2286                                 'nurl'    => Strings::normaliseLink($ret['url']),
2287                                 'addr'    => $ret['addr'],
2288                                 'alias'   => $ret['alias'],
2289                                 'batch'   => $ret['batch'],
2290                                 'notify'  => $ret['notify'],
2291                                 'poll'    => $ret['poll'],
2292                                 'poco'    => $ret['poco'],
2293                                 'name'    => $ret['name'],
2294                                 'nick'    => $ret['nick'],
2295                                 'network' => $ret['network'],
2296                                 'baseurl' => $ret['baseurl'],
2297                                 'gsid'    => $ret['gsid'] ?? null,
2298                                 'protocol' => $protocol,
2299                                 'pubkey'  => $ret['pubkey'],
2300                                 'rel'     => $new_relation,
2301                                 'priority'=> $ret['priority'],
2302                                 'writable'=> $writeable,
2303                                 'hidden'  => $hidden,
2304                                 'blocked' => 0,
2305                                 'readonly'=> 0,
2306                                 'pending' => $pending,
2307                                 'subhub'  => $subhub
2308                         ]);
2309                 }
2310
2311                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2312                 if (!DBA::isResult($contact)) {
2313                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2314                         return $result;
2315                 }
2316
2317                 $contact_id = $contact['id'];
2318                 $result['cid'] = $contact_id;
2319
2320                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2321
2322                 // Update the avatar
2323                 self::updateAvatar($contact_id, $ret['photo']);
2324
2325                 // pull feed and consume it, which should subscribe to the hub.
2326                 if ($contact['network'] == Protocol::OSTATUS) {
2327                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2328                 } else {
2329                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2330                 }
2331
2332                 $owner = User::getOwnerDataById($user['uid']);
2333
2334                 if (DBA::isResult($owner)) {
2335                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2336                                 // create a follow slap
2337                                 $item = [];
2338                                 $item['verb'] = Activity::FOLLOW;
2339                                 $item['gravity'] = GRAVITY_ACTIVITY;
2340                                 $item['follow'] = $contact["url"];
2341                                 $item['body'] = '';
2342                                 $item['title'] = '';
2343                                 $item['guid'] = '';
2344                                 $item['uri-id'] = 0;
2345
2346                                 $slap = OStatus::salmon($item, $owner);
2347
2348                                 if (!empty($contact['notify'])) {
2349                                         Salmon::slapper($owner, $contact['notify'], $slap);
2350                                 }
2351                         } elseif ($protocol == Protocol::DIASPORA) {
2352                                 $ret = Diaspora::sendShare($owner, $contact);
2353                                 Logger::log('share returns: ' . $ret);
2354                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2355                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2356                                 if (empty($activity_id)) {
2357                                         // This really should never happen
2358                                         return false;
2359                                 }
2360
2361                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2362                                 Logger::log('Follow returns: ' . $ret);
2363                         }
2364                 }
2365
2366                 $result['success'] = true;
2367                 return $result;
2368         }
2369
2370         /**
2371          * Updated contact's SSL policy
2372          *
2373          * @param array  $contact    Contact array
2374          * @param string $new_policy New policy, valid: self,full
2375          *
2376          * @return array Contact array with updated values
2377          * @throws \Exception
2378          */
2379         public static function updateSslPolicy(array $contact, $new_policy)
2380         {
2381                 $ssl_changed = false;
2382                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2383                         $ssl_changed = true;
2384                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2385                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2386                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2387                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2388                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2389                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2390                 }
2391
2392                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2393                         $ssl_changed = true;
2394                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2395                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2396                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2397                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2398                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2399                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2400                 }
2401
2402                 if ($ssl_changed) {
2403                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2404                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2405                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2406                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2407                 }
2408
2409                 return $contact;
2410         }
2411
2412         /**
2413          * @param array  $importer Owner (local user) data
2414          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2415          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2416          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2417          * @param string $note     Introduction additional message
2418          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2419          * @throws HTTPException\InternalServerErrorException
2420          * @throws \ImagickException
2421          */
2422         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2423         {
2424                 // Should always be set
2425                 if (empty($datarray['author-id'])) {
2426                         return false;
2427                 }
2428
2429                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2430                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2431                 if (!DBA::isResult($pub_contact)) {
2432                         // Should never happen
2433                         return false;
2434                 }
2435
2436                 // Contact is blocked at node-level
2437                 if (self::isBlocked($datarray['author-id'])) {
2438                         return false;
2439                 }
2440
2441                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2442                 $name = $pub_contact['name'];
2443                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2444                 $nick = $pub_contact['nick'];
2445                 $network = $pub_contact['network'];
2446
2447                 // Ensure that we don't create a new contact when there already is one
2448                 $cid = self::getIdForURL($url, $importer['uid']);
2449                 if (!empty($cid)) {
2450                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2451                 }
2452
2453                 if (!empty($contact)) {
2454                         if (!empty($contact['pending'])) {
2455                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2456                                 return null;
2457                         }
2458
2459                         // Contact is blocked at user-level
2460                         if (!empty($contact['id']) && !empty($importer['id']) &&
2461                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2462                                 return false;
2463                         }
2464
2465                         // Make sure that the existing contact isn't archived
2466                         self::unmarkForArchival($contact);
2467
2468                         if (($contact['rel'] == self::SHARING)
2469                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2470                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2471                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2472                         }
2473
2474                         // Ensure to always have the correct network type, independent from the connection request method
2475                         self::updateFromProbe($contact['id']);
2476
2477                         return true;
2478                 } else {
2479                         // send email notification to owner?
2480                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2481                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2482                                 return null;
2483                         }
2484
2485                         // create contact record
2486                         DBA::insert('contact', [
2487                                 'uid'      => $importer['uid'],
2488                                 'created'  => DateTimeFormat::utcNow(),
2489                                 'url'      => $url,
2490                                 'nurl'     => Strings::normaliseLink($url),
2491                                 'name'     => $name,
2492                                 'nick'     => $nick,
2493                                 'network'  => $network,
2494                                 'rel'      => self::FOLLOWER,
2495                                 'blocked'  => 0,
2496                                 'readonly' => 0,
2497                                 'pending'  => 1,
2498                                 'writable' => 1,
2499                         ]);
2500
2501                         $contact_id = DBA::lastInsertId();
2502
2503                         // Ensure to always have the correct network type, independent from the connection request method
2504                         self::updateFromProbe($contact_id);
2505
2506                         self::updateAvatar($contact_id, $photo, true);
2507
2508                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2509
2510                         /// @TODO Encapsulate this into a function/method
2511                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2512                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2513                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2514                                 // create notification
2515                                 $hash = Strings::getRandomHex();
2516
2517                                 if (is_array($contact_record)) {
2518                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2519                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2520                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2521                                 }
2522
2523                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2524
2525                                 if (($user['notify-flags'] & Notification\Type::INTRO) &&
2526                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2527
2528                                         notification([
2529                                                 'type'  => Notification\Type::INTRO,
2530                                                 'otype' => Notification\ObjectType::INTRO,
2531                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2532                                                 'uid'   => $user['uid'],
2533                                                 'cid'   => $contact_record['id'],
2534                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2535                                         ]);
2536                                 }
2537                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2538                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2539                                         self::createFromProbe($importer, $url, false, $network);
2540                                 }
2541
2542                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2543                                 $fields = ['pending' => false];
2544                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2545                                         $fields['rel'] = self::FRIEND;
2546                                 }
2547
2548                                 DBA::update('contact', $fields, $condition);
2549
2550                                 return true;
2551                         }
2552                 }
2553
2554                 return null;
2555         }
2556
2557         public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
2558         {
2559                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2560                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2561                 } else {
2562                         self::remove($contact['id']);
2563                 }
2564         }
2565
2566         public static function removeSharer($importer, $contact, array $datarray = [], $item = "")
2567         {
2568                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2569                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2570                 } else {
2571                         self::remove($contact['id']);
2572                 }
2573         }
2574
2575         /**
2576          * Create a birthday event.
2577          *
2578          * Update the year and the birthday.
2579          */
2580         public static function updateBirthdays()
2581         {
2582                 $condition = [
2583                         '`bd` > ?
2584                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2585                         AND NOT `contact`.`pending`
2586                         AND NOT `contact`.`hidden`
2587                         AND NOT `contact`.`blocked`
2588                         AND NOT `contact`.`archive`
2589                         AND NOT `contact`.`deleted`',
2590                         DBA::NULL_DATE,
2591                         self::SHARING,
2592                         self::FRIEND
2593                 ];
2594
2595                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2596
2597                 while ($contact = DBA::fetch($contacts)) {
2598                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2599
2600                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2601
2602                         if (Event::createBirthday($contact, $nextbd)) {
2603                                 // update bdyear
2604                                 DBA::update(
2605                                         'contact',
2606                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2607                                         ['id' => $contact['id']]
2608                                 );
2609                         }
2610                 }
2611                 DBA::close($contacts);
2612         }
2613
2614         /**
2615          * Remove the unavailable contact ids from the provided list
2616          *
2617          * @param array $contact_ids Contact id list
2618          * @return array
2619          * @throws \Exception
2620          */
2621         public static function pruneUnavailable(array $contact_ids)
2622         {
2623                 if (empty($contact_ids)) {
2624                         return [];
2625                 }
2626
2627                 $contacts = self::selectToArray(['id'], [
2628                         'id'      => $contact_ids,
2629                         'blocked' => false,
2630                         'pending' => false,
2631                         'archive' => false,
2632                 ]);
2633
2634                 return array_column($contacts, 'id');
2635         }
2636
2637         /**
2638          * Returns a magic link to authenticate remote visitors
2639          *
2640          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2641          *
2642          * @param string $contact_url The address of the target contact profile
2643          * @param string $url         An url that we will be redirected to after the authentication
2644          *
2645          * @return string with "redir" link
2646          * @throws HTTPException\InternalServerErrorException
2647          * @throws \ImagickException
2648          */
2649         public static function magicLink($contact_url, $url = '')
2650         {
2651                 if (!Session::isAuthenticated()) {
2652                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2653                 }
2654
2655                 $contact = self::getByURL($contact_url, false);
2656                 if (empty($contact)) {
2657                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2658                 }
2659
2660                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2661                 unset($contact['uid']);
2662
2663                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2664         }
2665
2666         /**
2667          * Returns a magic link to authenticate remote visitors
2668          *
2669          * @param integer $cid The contact id of the target contact profile
2670          * @param string  $url An url that we will be redirected to after the authentication
2671          *
2672          * @return string with "redir" link
2673          * @throws HTTPException\InternalServerErrorException
2674          * @throws \ImagickException
2675          */
2676         public static function magicLinkById($cid, $url = '')
2677         {
2678                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2679
2680                 return self::magicLinkByContact($contact, $url);
2681         }
2682
2683         /**
2684          * Returns a magic link to authenticate remote visitors
2685          *
2686          * @param array  $contact The contact array with "uid", "network" and "url"
2687          * @param string $url     An url that we will be redirected to after the authentication
2688          *
2689          * @return string with "redir" link
2690          * @throws HTTPException\InternalServerErrorException
2691          * @throws \ImagickException
2692          */
2693         public static function magicLinkByContact($contact, $url = '')
2694         {
2695                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2696
2697                 if (!Session::isAuthenticated()) {
2698                         return $destination;
2699                 }
2700
2701                 // Only redirections to the same host do make sense
2702                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2703                         return $url;
2704                 }
2705
2706                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2707                         return 'contact/' . $contact['id'] . '/conversations';
2708                 }
2709
2710                 if (!empty($contact['network']) && $contact['network'] != Protocol::DFRN) {
2711                         return $destination;
2712                 }
2713
2714                 if (empty($contact['id'])) {
2715                         return $destination;
2716                 }
2717
2718                 $redirect = 'redir/' . $contact['id'];
2719
2720                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2721                         $redirect .= '?url=' . $url;
2722                 }
2723
2724                 return $redirect;
2725         }
2726
2727         /**
2728          * Is the contact a forum?
2729          *
2730          * @param integer $contactid ID of the contact
2731          *
2732          * @return boolean "true" if it is a forum
2733          */
2734         public static function isForum($contactid)
2735         {
2736                 $fields = ['forum', 'prv'];
2737                 $condition = ['id' => $contactid];
2738                 $contact = DBA::selectFirst('contact', $fields, $condition);
2739                 if (!DBA::isResult($contact)) {
2740                         return false;
2741                 }
2742
2743                 // Is it a forum?
2744                 return ($contact['forum'] || $contact['prv']);
2745         }
2746
2747         /**
2748          * Can the remote contact receive private messages?
2749          *
2750          * @param array $contact
2751          * @return bool
2752          */
2753         public static function canReceivePrivateMessages(array $contact)
2754         {
2755                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2756                 $self = $contact['self'] ?? false;
2757
2758                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2759         }
2760
2761         /**
2762          * Search contact table by nick or name
2763          *
2764          * @param string $search Name or nick
2765          * @param string $mode   Search mode (e.g. "community")
2766          *
2767          * @return array with search results
2768          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2769          */
2770         public static function searchByName($search, $mode = '')
2771         {
2772                 if (empty($search)) {
2773                         return [];
2774                 }
2775
2776                 // check supported networks
2777                 if (DI::config()->get('system', 'diaspora_enabled')) {
2778                         $diaspora = Protocol::DIASPORA;
2779                 } else {
2780                         $diaspora = Protocol::DFRN;
2781                 }
2782
2783                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2784                         $ostatus = Protocol::OSTATUS;
2785                 } else {
2786                         $ostatus = Protocol::DFRN;
2787                 }
2788
2789                 // check if we search only communities or every contact
2790                 if ($mode === 'community') {
2791                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
2792                 } else {
2793                         $extra_sql = '';
2794                 }
2795
2796                 $search .= '%';
2797
2798                 $results = DBA::p("SELECT * FROM `contact`
2799                         WHERE NOT `unsearchable` AND `network` IN (?, ?, ?, ?) AND
2800                                 NOT `failed` AND `uid` = ? AND
2801                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2802                                 ORDER BY `nurl` DESC LIMIT 1000",
2803                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, 0, $search, $search, $search
2804                 );
2805
2806                 $contacts = DBA::toArray($results);
2807                 return $contacts;
2808         }
2809
2810         /**
2811          * Add public contacts from an array
2812          *
2813          * @param array $urls
2814          * @return array result "count", "added" and "updated"
2815          */
2816         public static function addByUrls(array $urls)
2817         {
2818                 $added = 0;
2819                 $updated = 0;
2820                 $unchanged = 0;
2821                 $count = 0;
2822
2823                 foreach ($urls as $url) {
2824                         $contact = self::getByURL($url, false, ['id', 'updated']);
2825                         if (empty($contact['id'])) {
2826                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
2827                                 ++$added;
2828                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
2829                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
2830                                 ++$updated;
2831                         } else {
2832                                 ++$unchanged;
2833                         }
2834                         ++$count;
2835                 }
2836
2837                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
2838         }
2839
2840         /**
2841          * Returns a random, global contact array of the current node
2842          *
2843          * @return array The profile array
2844          * @throws Exception
2845          */
2846         public static function getRandomContact()
2847         {
2848                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], [
2849                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
2850                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
2851                 ], ['order' => ['RAND()']]);
2852
2853                 if (DBA::isResult($contact)) {
2854                         return $contact;
2855                 }
2856
2857                 return [];
2858         }
2859 }