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\Model\Notify\Type;
  38 use Friendica\Network\HTTPException;
  39 use Friendica\Network\Probe;
  40 use Friendica\Protocol\Activity;
  41 use Friendica\Protocol\ActivityPub;
  42 use Friendica\Protocol\DFRN;
  43 use Friendica\Protocol\Diaspora;
  44 use Friendica\Protocol\OStatus;
  45 use Friendica\Protocol\Salmon;
  46 use Friendica\Util\DateTimeFormat;
  47 use Friendica\Util\Images;
  48 use Friendica\Util\Network;
  49 use Friendica\Util\Proxy;
  50 use Friendica\Util\Strings;
  51
  52 /**
  53  * functions for interacting with a contact
  54  */
  55 class Contact
  56 {
  57         const DEFAULT_AVATAR_PHOTO = '/images/person-300.jpg';
  58         const DEFAULT_AVATAR_THUMB = '/images/person-80.jpg';
  59         const DEFAULT_AVATAR_MICRO = '/images/person-48.jpg';
  60
  61         /**
  62          * @deprecated since version 2019.03
  63          * @see User::PAGE_FLAGS_NORMAL
  64          */
  65         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  66         /**
  67          * @deprecated since version 2019.03
  68          * @see User::PAGE_FLAGS_SOAPBOX
  69          */
  70         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  71         /**
  72          * @deprecated since version 2019.03
  73          * @see User::PAGE_FLAGS_COMMUNITY
  74          */
  75         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  76         /**
  77          * @deprecated since version 2019.03
  78          * @see User::PAGE_FLAGS_FREELOVE
  79          */
  80         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  81         /**
  82          * @deprecated since version 2019.03
  83          * @see User::PAGE_FLAGS_BLOG
  84          */
  85         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  86         /**
  87          * @deprecated since version 2019.03
  88          * @see User::PAGE_FLAGS_PRVGROUP
  89          */
  90         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  91         /**
  92          * @}
  93          */
  94
  95         const LOCK_INSERT = 'contact-insert';
  96
  97         /**
  98          * Account types
  99          *
 100          * TYPE_UNKNOWN - unknown type
 101          *
 102          * TYPE_PERSON - the account belongs to a person
 103          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
 104          *
 105          * TYPE_ORGANISATION - the account belongs to an organisation
 106          *      Associated page type: PAGE_SOAPBOX
 107          *
 108          * TYPE_NEWS - the account is a news reflector
 109          *      Associated page type: PAGE_SOAPBOX
 110          *
 111          * TYPE_COMMUNITY - the account is community forum
 112          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 113          *
 114          * TYPE_RELAY - the account is a relay
 115          *      This will only be assigned to contacts, not to user accounts
 116          * @{
 117          */
 118         const TYPE_UNKNOWN =     -1;
 119         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 120         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 121         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 122         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 123         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 124         /**
 125          * @}
 126          */
 127
 128         /**
 129          * Contact_is
 130          *
 131          * Relationship types
 132          * @{
 133          */
 134         const NOTHING  = 0;
 135         const FOLLOWER = 1;
 136         const SHARING  = 2;
 137         const FRIEND   = 3;
 138         /**
 139          * @}
 140          */
 141
 142          const MIRROR_DEACTIVATED = 0;
 143          const MIRROR_FORWARDED = 1;
 144          const MIRROR_OWN_POST = 2;
 145          const MIRROR_NATIVE_RESHARE = 3;
 146
 147          /**
 148          * @param array $fields    Array of selected fields, empty for all
 149          * @param array $condition Array of fields for condition
 150          * @param array $params    Array of several parameters
 151          * @return array
 152          * @throws \Exception
 153          */
 154         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 155         {
 156                 return DBA::selectToArray('contact', $fields, $condition, $params);
 157         }
 158
 159         /**
 160          * @param array $fields    Array of selected fields, empty for all
 161          * @param array $condition Array of fields for condition
 162          * @param array $params    Array of several parameters
 163          * @return array
 164          * @throws \Exception
 165          */
 166         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 167         {
 168                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 169
 170                 return $contact;
 171         }
 172
 173         /**
 174          * Insert a row into the contact table
 175          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 176          *
 177          * @param array $fields         field array
 178          * @param int   $duplicate_mode Do an update on a duplicate entry
 179          *
 180          * @return boolean was the insert successful?
 181          * @throws \Exception
 182          */
 183         public static function insert(array $fields, int $duplicate_mode = Database::INSERT_DEFAULT)
 184         {
 185                 if (!empty($fields['baseurl']) && empty($fields['gsid'])) {
 186                         $fields['gsid'] = GServer::getID($fields['baseurl'], true);
 187                 }
 188
 189                 if (empty($fields['created'])) {
 190                         $fields['created'] = DateTimeFormat::utcNow();
 191                 }
 192
 193                 $ret = DBA::insert('contact', $fields, $duplicate_mode);
 194                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 195                 if (!DBA::isResult($contact)) {
 196                         // Shouldn't happen
 197                         return $ret;
 198                 }
 199
 200                 // Search for duplicated contacts and get rid of them
 201                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 202
 203                 return $ret;
 204         }
 205
 206         /**
 207          * @param integer $id     Contact ID
 208          * @param array   $fields Array of selected fields, empty for all
 209          * @return array|boolean Contact record if it exists, false otherwise
 210          * @throws \Exception
 211          */
 212         public static function getById($id, $fields = [])
 213         {
 214                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 215         }
 216
 217         /**
 218          * Fetches a contact by a given url
 219          *
 220          * @param string  $url    profile url
 221          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 222          * @param array   $fields Field list
 223          * @param integer $uid    User ID of the contact
 224          * @return array contact array
 225          */
 226         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 227         {
 228                 if ($update || is_null($update)) {
 229                         $cid = self::getIdForURL($url, $uid, $update);
 230                         if (empty($cid)) {
 231                                 return [];
 232                         }
 233
 234                         $contact = self::getById($cid, $fields);
 235                         if (empty($contact)) {
 236                                 return [];
 237                         }
 238                         return $contact;
 239                 }
 240
 241                 // Add internal fields
 242                 $removal = [];
 243                 if (!empty($fields)) {
 244                         foreach (['id', 'avatar', 'created', 'updated', 'last-update', 'success_update', 'failure_update', 'network'] as $internal) {
 245                                 if (!in_array($internal, $fields)) {
 246                                         $fields[] = $internal;
 247                                         $removal[] = $internal;
 248                                 }
 249                         }
 250                 }
 251
 252                 // We first try the nurl (http://server.tld/nick), most common case
 253                 $options = ['order' => ['id']];
 254                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 255
 256                 // Then the addr (nick@server.tld)
 257                 if (!DBA::isResult($contact)) {
 258                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 259                 }
 260
 261                 // Then the alias (which could be anything)
 262                 if (!DBA::isResult($contact)) {
 263                         // The link could be provided as http although we stored it as https
 264                         $ssl_url = str_replace('http://', 'https://', $url);
 265                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 266                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 267                 }
 268
 269                 if (!DBA::isResult($contact)) {
 270                         return [];
 271                 }
 272
 273                 // Update the contact in the background if needed
 274                 $updated = max($contact['success_update'], $contact['created'], $contact['updated'], $contact['last-update'], $contact['failure_update']);
 275                 if (($updated < DateTimeFormat::utc('now -7 days')) && in_array($contact['network'], Protocol::FEDERATED)) {
 276                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id']);
 277                 }
 278
 279                 // Remove the internal fields
 280                 foreach ($removal as $internal) {
 281                         unset($contact[$internal]);
 282                 }
 283
 284                 return $contact;
 285         }
 286
 287         /**
 288          * Fetches a contact for a given user by a given url.
 289          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 290          *
 291          * @param string  $url    profile url
 292          * @param integer $uid    User ID of the contact
 293          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 294          * @param array   $fields Field list
 295          * @return array contact array
 296          */
 297         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 298         {
 299                 if ($uid != 0) {
 300                         $contact = self::getByURL($url, $update, $fields, $uid);
 301                         if (!empty($contact)) {
 302                                 if (!empty($contact['id'])) {
 303                                         $contact['cid'] = $contact['id'];
 304                                         $contact['zid'] = 0;
 305                                 }
 306                                 return $contact;
 307                         }
 308                 }
 309
 310                 $contact = self::getByURL($url, $update, $fields);
 311                 if (!empty($contact['id'])) {
 312                         $contact['cid'] = 0;
 313                         $contact['zid'] = $contact['id'];
 314                 }
 315                 return $contact;
 316         }
 317
 318         /**
 319          * Tests if the given contact is a follower
 320          *
 321          * @param int $cid Either public contact id or user's contact id
 322          * @param int $uid User ID
 323          *
 324          * @return boolean is the contact id a follower?
 325          * @throws HTTPException\InternalServerErrorException
 326          * @throws \ImagickException
 327          */
 328         public static function isFollower($cid, $uid)
 329         {
 330                 if (Contact\User::isBlocked($cid, $uid)) {
 331                         return false;
 332                 }
 333
 334                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 335                 if (empty($cdata['user'])) {
 336                         return false;
 337                 }
 338
 339                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 340                 return DBA::exists('contact', $condition);
 341         }
 342
 343         /**
 344          * Tests if the given contact url is a follower
 345          *
 346          * @param string $url Contact URL
 347          * @param int    $uid User ID
 348          *
 349          * @return boolean is the contact id a follower?
 350          * @throws HTTPException\InternalServerErrorException
 351          * @throws \ImagickException
 352          */
 353         public static function isFollowerByURL($url, $uid)
 354         {
 355                 $cid = self::getIdForURL($url, $uid);
 356
 357                 if (empty($cid)) {
 358                         return false;
 359                 }
 360
 361                 return self::isFollower($cid, $uid);
 362         }
 363
 364         /**
 365          * Tests if the given user follow the given contact
 366          *
 367          * @param int $cid Either public contact id or user's contact id
 368          * @param int $uid User ID
 369          *
 370          * @return boolean is the contact url being followed?
 371          * @throws HTTPException\InternalServerErrorException
 372          * @throws \ImagickException
 373          */
 374         public static function isSharing($cid, $uid)
 375         {
 376                 if (Contact\User::isBlocked($cid, $uid)) {
 377                         return false;
 378                 }
 379
 380                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 381                 if (empty($cdata['user'])) {
 382                         return false;
 383                 }
 384
 385                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 386                 return DBA::exists('contact', $condition);
 387         }
 388
 389         /**
 390          * Tests if the given user follow the given contact url
 391          *
 392          * @param string $url Contact URL
 393          * @param int    $uid User ID
 394          *
 395          * @return boolean is the contact url being followed?
 396          * @throws HTTPException\InternalServerErrorException
 397          * @throws \ImagickException
 398          */
 399         public static function isSharingByURL($url, $uid)
 400         {
 401                 $cid = self::getIdForURL($url, $uid);
 402
 403                 if (empty($cid)) {
 404                         return false;
 405                 }
 406
 407                 return self::isSharing($cid, $uid);
 408         }
 409
 410         /**
 411          * Get the basepath for a given contact link
 412          *
 413          * @param string $url The contact link
 414          * @param boolean $dont_update Don't update the contact
 415          *
 416          * @return string basepath
 417          * @throws HTTPException\InternalServerErrorException
 418          * @throws \ImagickException
 419          */
 420         public static function getBasepath($url, $dont_update = false)
 421         {
 422                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 423                 if (!DBA::isResult($contact)) {
 424                         return '';
 425                 }
 426
 427                 if (!empty($contact['baseurl'])) {
 428                         return $contact['baseurl'];
 429                 } elseif ($dont_update) {
 430                         return '';
 431                 }
 432
 433                 // Update the existing contact
 434                 self::updateFromProbe($contact['id']);
 435
 436                 // And fetch the result
 437                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 438                 if (empty($contact['baseurl'])) {
 439                         Logger::info('No baseurl for contact', ['url' => $url]);
 440                         return '';
 441                 }
 442
 443                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 444                 return $contact['baseurl'];
 445         }
 446
 447         /**
 448          * Check if the given contact url is on the same server
 449          *
 450          * @param string $url The contact link
 451          *
 452          * @return boolean Is it the same server?
 453          */
 454         public static function isLocal($url)
 455         {
 456                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 457         }
 458
 459         /**
 460          * Check if the given contact ID is on the same server
 461          *
 462          * @param string $url The contact link
 463          *
 464          * @return boolean Is it the same server?
 465          */
 466         public static function isLocalById(int $cid)
 467         {
 468                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 469                 if (!DBA::isResult($contact)) {
 470                         return false;
 471                 }
 472
 473                 if (empty($contact['baseurl'])) {
 474                         $baseurl = self::getBasepath($contact['url'], true);
 475                 } else {
 476                         $baseurl = $contact['baseurl'];
 477                 }
 478
 479                 return Strings::compareLink($baseurl, DI::baseUrl());
 480         }
 481
 482         /**
 483          * Returns the public contact id of the given user id
 484          *
 485          * @param  integer $uid User ID
 486          *
 487          * @return integer|boolean Public contact id for given user id
 488          * @throws \Exception
 489          */
 490         public static function getPublicIdByUserId($uid)
 491         {
 492                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 493                 if (!DBA::isResult($self)) {
 494                         return false;
 495                 }
 496                 return self::getIdForURL($self['url']);
 497         }
 498
 499         /**
 500          * Returns the contact id for the user and the public contact id for a given contact id
 501          *
 502          * @param int $cid Either public contact id or user's contact id
 503          * @param int $uid User ID
 504          *
 505          * @return array with public and user's contact id
 506          * @throws HTTPException\InternalServerErrorException
 507          * @throws \ImagickException
 508          */
 509         public static function getPublicAndUserContacID($cid, $uid)
 510         {
 511                 if (empty($uid) || empty($cid)) {
 512                         return [];
 513                 }
 514
 515                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 516                 if (!DBA::isResult($contact)) {
 517                         return [];
 518                 }
 519
 520                 // We quit when the user id don't match the user id of the provided contact
 521                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 522                         return [];
 523                 }
 524
 525                 if ($contact['uid'] != 0) {
 526                         $pcid = self::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 527                         if (empty($pcid)) {
 528                                 return [];
 529                         }
 530                         $ucid = $contact['id'];
 531                 } else {
 532                         $pcid = $contact['id'];
 533                         $ucid = self::getIdForURL($contact['url'], $uid);
 534                 }
 535
 536                 return ['public' => $pcid, 'user' => $ucid];
 537         }
 538
 539         /**
 540          * Returns contact details for a given contact id in combination with a user id
 541          *
 542          * @param int $cid A contact ID
 543          * @param int $uid The User ID
 544          * @param array $fields The selected fields for the contact
 545          *
 546          * @return array The contact details
 547          *
 548          * @throws \Exception
 549          */
 550         public static function getContactForUser($cid, $uid, array $fields = [])
 551         {
 552                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 553
 554                 if (!DBA::isResult($contact)) {
 555                         return [];
 556                 } else {
 557                         return $contact;
 558                 }
 559         }
 560
 561         /**
 562          * Creates the self-contact for the provided user id
 563          *
 564          * @param int $uid
 565          * @return bool Operation success
 566          * @throws HTTPException\InternalServerErrorException
 567          */
 568         public static function createSelfFromUserId($uid)
 569         {
 570                 // Only create the entry if it doesn't exist yet
 571                 if (DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 572                         return true;
 573                 }
 574
 575                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname', 'pubkey', 'prvkey'], ['uid' => $uid]);
 576                 if (!DBA::isResult($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' => $uid]);
 629                 if (!DBA::isResult($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) || !intval($contact['uid'])) {
 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                         DBA::update('contact', $fields, $condition);
 860                 }
 861
 862                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
 863                 $exists = DBA::exists('contact', $condition);
 864
 865                 // We don't need to update, we never marked this contact for archival
 866                 if (!$exists) {
 867                         return;
 868                 }
 869
 870                 Logger::info('Contact is marked as vital again', ['id' => $contact['id'], 'term-date' => $contact['term-date']]);
 871
 872                 if (!isset($contact['url']) && !empty($contact['id'])) {
 873                         $fields = ['id', 'url', 'batch'];
 874                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 875                         if (!DBA::isResult($contact)) {
 876                                 return;
 877                         }
 878                 }
 879
 880                 // It's a miracle. Our dead contact has inexplicably come back to life.
 881                 $fields = ['failed' => false, 'term-date' => DBA::NULL_DATETIME, 'archive' => false];
 882                 DBA::update('contact', $fields, ['id' => $contact['id']]);
 883                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
 884         }
 885
 886         /**
 887          * Returns the data array for the photo menu of a given contact
 888          *
 889          * @param array $contact contact
 890          * @param int   $uid     optional, default 0
 891          * @return array
 892          * @throws HTTPException\InternalServerErrorException
 893          * @throws \ImagickException
 894          */
 895         public static function photoMenu(array $contact, $uid = 0)
 896         {
 897                 $pm_url = '';
 898                 $status_link = '';
 899                 $photos_link = '';
 900                 $contact_drop_link = '';
 901                 $poke_link = '';
 902
 903                 if ($uid == 0) {
 904                         $uid = local_user();
 905                 }
 906
 907                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
 908                         if ($uid == 0) {
 909                                 $profile_link = self::magicLink($contact['url']);
 910                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
 911
 912                                 return $menu;
 913                         }
 914
 915                         // Look for our own contact if the uid doesn't match and isn't public
 916                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
 917                         if (DBA::isResult($contact_own)) {
 918                                 return self::photoMenu($contact_own, $uid);
 919                         }
 920                 }
 921
 922                 $sparkle = false;
 923                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 924                         $sparkle = true;
 925                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
 926                 } else {
 927                         $profile_link = $contact['url'];
 928                 }
 929
 930                 if ($profile_link === 'mailbox') {
 931                         $profile_link = '';
 932                 }
 933
 934                 if ($sparkle) {
 935                         $status_link = $profile_link . '/status';
 936                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
 937                         $profile_link = $profile_link . '/profile';
 938                 }
 939
 940                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
 941                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
 942                 }
 943
 944                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
 945                         $poke_link = 'contact/' . $contact['id'] . '/poke';
 946                 }
 947
 948                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
 949
 950                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
 951
 952                 if (!$contact['self']) {
 953                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
 954                 }
 955
 956                 $follow_link = '';
 957                 $unfollow_link = '';
 958                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
 959                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
 960                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']) . '&auto=1';
 961                         } elseif(!$contact['pending']) {
 962                                 $follow_link = 'follow?url=' . urlencode($contact['url']) . '&auto=1';
 963                         }
 964                 }
 965
 966                 if (!empty($follow_link) || !empty($unfollow_link)) {
 967                         $contact_drop_link = '';
 968                 }
 969
 970                 /**
 971                  * Menu array:
 972                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
 973                  */
 974                 if (empty($contact['uid'])) {
 975                         $menu = [
 976                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
 977                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
 978                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
 979                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
 980                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
 981                         ];
 982                 } else {
 983                         $menu = [
 984                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
 985                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
 986                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
 987                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
 988                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
 989                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
 990                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
 991                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
 992                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
 993                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
 994                         ];
 995
 996                         if (!empty($contact['pending'])) {
 997                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
 998                                 if (DBA::isResult($intro)) {
 999                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1000                                 }
1001                         }
1002                 }
1003
1004                 $args = ['contact' => $contact, 'menu' => &$menu];
1005
1006                 Hook::callAll('contact_photo_menu', $args);
1007
1008                 $menucondensed = [];
1009
1010                 foreach ($menu as $menuname => $menuitem) {
1011                         if ($menuitem[1] != '') {
1012                                 $menucondensed[$menuname] = $menuitem;
1013                         }
1014                 }
1015
1016                 return $menucondensed;
1017         }
1018
1019         /**
1020          * Fetch the contact id for a given URL and user
1021          *
1022          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1023          * `addr` or `alias`.
1024          *
1025          * If there's no record and we aren't looking for a public contact, we quit.
1026          * If there's one, we check that it isn't time to update the picture else we
1027          * directly return the found contact id.
1028          *
1029          * Second, we probe the provided $url whether it's http://server.tld/profile or
1030          * nick@server.tld. We quit if we can't get any info back.
1031          *
1032          * Third, we create the contact record if it doesn't exist
1033          *
1034          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1035          * if there's any updates
1036          *
1037          * @param string  $url       Contact URL
1038          * @param integer $uid       The user id for the contact (0 = public contact)
1039          * @param boolean $update    true = always update, false = never update, null = update when not found
1040          * @param array   $default   Default value for creating the contact when everything else fails
1041          *
1042          * @return integer Contact ID
1043          * @throws HTTPException\InternalServerErrorException
1044          * @throws \ImagickException
1045          */
1046         public static function getIdForURL($url, $uid = 0, $update = null, $default = [])
1047         {
1048                 $contact_id = 0;
1049
1050                 if ($url == '') {
1051                         Logger::notice('Empty url, quitting', ['url' => $url, 'user' => $uid, 'default' => $default]);
1052                         return 0;
1053                 }
1054
1055                 $contact = self::getByURL($url, false, ['id', 'network'], $uid);
1056
1057                 if (!empty($contact)) {
1058                         $contact_id = $contact["id"];
1059
1060                         if (empty($update)) {
1061                                 Logger::debug('Contact found', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1062                                 return $contact_id;
1063                         }
1064                 } elseif ($uid != 0) {
1065                         Logger::debug('Contact does not exist for the user', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1066                         return 0;
1067                 } elseif (empty($default) && !is_null($update) && !$update) {
1068                         Logger::info('Contact not found, update not desired', ['url' => $url, 'uid' => $uid, 'update' => $update]);
1069                         return 0;
1070                 }
1071
1072                 $data = [];
1073
1074                 if (empty($default['network']) || $update) {
1075                         $data = Probe::uri($url, "", $uid);
1076
1077                         // Take the default values when probing failed
1078                         if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1079                                 $data = array_merge($data, $default);
1080                         }
1081                 } elseif (!empty($default['network'])) {
1082                         $data = $default;
1083                 }
1084
1085                 if (($uid == 0) && (empty($data['network']) || ($data['network'] == Protocol::PHANTOM))) {
1086                         // Fetch data for the public contact via the first found personal contact
1087                         /// @todo Check if this case can happen at all (possibly with mail accounts?)
1088                         $fields = ['name', 'nick', 'url', 'addr', 'alias', 'avatar', 'contact-type',
1089                                 'keywords', 'location', 'about', 'unsearchable', 'batch', 'notify', 'poll',
1090                                 'request', 'confirm', 'poco', 'subscribe', 'network', 'baseurl', 'gsid'];
1091
1092                         $personal_contact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `uid` != 0", $url]);
1093                         if (!DBA::isResult($personal_contact)) {
1094                                 $personal_contact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `uid` != 0", Strings::normaliseLink($url)]);
1095                         }
1096
1097                         if (DBA::isResult($personal_contact)) {
1098                                 Logger::info('Take contact data from personal contact', ['url' => $url, 'update' => $update, 'contact' => $personal_contact, 'callstack' => System::callstack(20)]);
1099                                 $data = $personal_contact;
1100                                 $data['photo'] = $personal_contact['avatar'];
1101                                 $data['account-type'] = $personal_contact['contact-type'];
1102                                 $data['hide'] = $personal_contact['unsearchable'];
1103                                 unset($data['avatar']);
1104                                 unset($data['contact-type']);
1105                                 unset($data['unsearchable']);
1106                         }
1107                 }
1108
1109                 if (empty($data['network']) || ($data['network'] == Protocol::PHANTOM)) {
1110                         Logger::notice('No valid network found', ['url' => $url, 'uid' => $uid, 'default' => $default, 'update' => $update, 'callstack' => System::callstack(20)]);
1111                         return 0;
1112                 }
1113
1114                 if (!$contact_id) {
1115                         $urls = [Strings::normaliseLink($url), Strings::normaliseLink($data['url'])];
1116                         if (!empty($data['alias'])) {
1117                                 $urls[] = Strings::normaliseLink($data['alias']);
1118                         }
1119                         $contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
1120                         if (!empty($contact['id'])) {
1121                                 $contact_id = $contact['id'];
1122                                 Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
1123                         }
1124                 }
1125
1126                 if (!$contact_id) {
1127                         // We only insert the basic data. The rest will be done in "updateFromProbeArray"
1128                         $fields = [
1129                                 'uid'       => $uid,
1130                                 'url'       => $data['url'],
1131                                 'nurl'      => Strings::normaliseLink($data['url']),
1132                                 'network'   => $data['network'],
1133                                 'created'   => DateTimeFormat::utcNow(),
1134                                 'rel'       => self::SHARING,
1135                                 'writable'  => 1,
1136                                 'blocked'   => 0,
1137                                 'readonly'  => 0,
1138                                 'pending'   => 0];
1139
1140                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1141
1142                         // Before inserting we do check if the entry does exist now.
1143                         if (DI::lock()->acquire(self::LOCK_INSERT, 0)) {
1144                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1145                                 if (DBA::isResult($contact)) {
1146                                         $contact_id = $contact['id'];
1147                                         Logger::notice('Contact had been created (shortly) before', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1148                                 } else {
1149                                         DBA::insert('contact', $fields);
1150                                         $contact_id = DBA::lastInsertId();
1151                                         if ($contact_id) {
1152                                                 Logger::info('Contact inserted', ['id' => $contact_id, 'url' => $url, 'uid' => $uid]);
1153                                         }
1154                                 }
1155                                 DI::lock()->release(self::LOCK_INSERT);
1156                         } else {
1157                                 Logger::warning('Contact lock had not been acquired');
1158                         }
1159
1160                         if (!$contact_id) {
1161                                 Logger::info('Contact was not inserted', ['url' => $url, 'uid' => $uid]);
1162                                 return 0;
1163                         }
1164                 } else {
1165                         Logger::info('Contact will be updated', ['url' => $url, 'uid' => $uid, 'update' => $update, 'cid' => $contact_id]);
1166                 }
1167
1168                 self::updateFromProbeArray($contact_id, $data);
1169
1170                 return $contact_id;
1171         }
1172
1173         /**
1174          * Checks if the contact is archived
1175          *
1176          * @param int $cid contact id
1177          *
1178          * @return boolean Is the contact archived?
1179          * @throws HTTPException\InternalServerErrorException
1180          */
1181         public static function isArchived(int $cid)
1182         {
1183                 if ($cid == 0) {
1184                         return false;
1185                 }
1186
1187                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1188                 if (!DBA::isResult($contact)) {
1189                         return false;
1190                 }
1191
1192                 if ($contact['archive']) {
1193                         return true;
1194                 }
1195
1196                 // Check status of ActivityPub endpoints
1197                 $apcontact = APContact::getByURL($contact['url'], false);
1198                 if (!empty($apcontact)) {
1199                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1200                                 return true;
1201                         }
1202
1203                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1204                                 return true;
1205                         }
1206                 }
1207
1208                 // Check status of Diaspora endpoints
1209                 if (!empty($contact['batch'])) {
1210                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1211                         return DBA::exists('contact', $condition);
1212                 }
1213
1214                 return false;
1215         }
1216
1217         /**
1218          * Checks if the contact is blocked
1219          *
1220          * @param int $cid contact id
1221          *
1222          * @return boolean Is the contact blocked?
1223          * @throws HTTPException\InternalServerErrorException
1224          */
1225         public static function isBlocked($cid)
1226         {
1227                 if ($cid == 0) {
1228                         return false;
1229                 }
1230
1231                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1232                 if (!DBA::isResult($blocked)) {
1233                         return false;
1234                 }
1235
1236                 if (Network::isUrlBlocked($blocked['url'])) {
1237                         return true;
1238                 }
1239
1240                 return (bool) $blocked['blocked'];
1241         }
1242
1243         /**
1244          * Checks if the contact is hidden
1245          *
1246          * @param int $cid contact id
1247          *
1248          * @return boolean Is the contact hidden?
1249          * @throws \Exception
1250          */
1251         public static function isHidden($cid)
1252         {
1253                 if ($cid == 0) {
1254                         return false;
1255                 }
1256
1257                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1258                 if (!DBA::isResult($hidden)) {
1259                         return false;
1260                 }
1261                 return (bool) $hidden['hidden'];
1262         }
1263
1264         /**
1265          * Returns posts from a given contact url
1266          *
1267          * @param string $contact_url Contact URL
1268          * @param bool   $thread_mode
1269          * @param int    $update      Update mode
1270          * @param int    $parent      Item parent ID for the update mode
1271          * @return string posts in HTML
1272          * @throws \Exception
1273          */
1274         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0, $parent = 0)
1275         {
1276                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update, $parent);
1277         }
1278
1279         /**
1280          * Returns posts from a given contact id
1281          *
1282          * @param int  $cid         Contact ID
1283          * @param bool $thread_mode
1284          * @param int  $update      Update mode
1285          * @param int  $parent     Item parent ID for the update mode
1286          * @return string posts in HTML
1287          * @throws \Exception
1288          */
1289         public static function getPostsFromId($cid, $thread_mode = false, $update = 0, $parent = 0)
1290         {
1291                 $a = DI::app();
1292
1293                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1294                 if (!DBA::isResult($contact)) {
1295                         return '';
1296                 }
1297
1298                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1299                         $sql = "(`item`.`uid` = 0 OR (`item`.`uid` = ? AND NOT `item`.`global`))";
1300                 } else {
1301                         $sql = "`item`.`uid` = ?";
1302                 }
1303
1304                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1305
1306                 if ($thread_mode) {
1307                         $condition = ["((`$contact_field` = ? AND `gravity` = ?) OR (`author-id` = ? AND `gravity` = ? AND `vid` = ?)) AND " . $sql,
1308                                 $cid, GRAVITY_PARENT, $cid, GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), local_user()];
1309                 } else {
1310                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1311                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1312                 }
1313
1314                 if (!empty($parent)) {
1315                         $condition = DBA::mergeConditions($condition, ['parent' => $parent]);
1316                 } else {
1317                         $last_received = isset($_GET['last_received']) ? DateTimeFormat::utc($_GET['last_received']) : '';
1318                         if (!empty($last_received)) {
1319                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $last_received]);
1320                         }
1321                 }
1322
1323                 if (DI::mode()->isMobile()) {
1324                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1325                                 DI::config()->get('system', 'itemspage_network_mobile'));
1326                 } else {
1327                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1328                                 DI::config()->get('system', 'itemspage_network'));
1329                 }
1330
1331                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1332
1333                 $params = ['order' => ['received' => true], 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1334
1335                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1336                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
1337                         $o = Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
1338                 } else {
1339                         $o = '';
1340                 }
1341
1342                 if ($thread_mode) {
1343                         $r = Item::selectForUser(local_user(), ['uri', 'gravity', 'parent-uri', 'thr-parent-id', 'author-id'], $condition, $params);
1344                         $items = [];
1345                         while ($item = DBA::fetch($r)) {
1346                                 $items[] = $item;
1347                         }
1348                         DBA::close($r);
1349
1350                         $o .= conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1351                 } else {
1352                         $r = Item::selectForUser(local_user(), [], $condition, $params);
1353
1354                         $items = Item::inArray($r);
1355
1356                         $o .= conversation($a, $items, 'contact-posts', $update);
1357                 }
1358
1359                 if (!$update) {
1360                         if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
1361                                 $o .= HTML::scrollLoader();
1362                         } else {
1363                                 $o .= $pager->renderMinimal(count($items));
1364                         }
1365                 }
1366
1367                 return $o;
1368         }
1369
1370         /**
1371          * Returns the account type name
1372          *
1373          * The function can be called with either the user or the contact array
1374          *
1375          * @param array $contact contact or user array
1376          * @return string
1377          */
1378         public static function getAccountType(array $contact)
1379         {
1380                 // There are several fields that indicate that the contact or user is a forum
1381                 // "page-flags" is a field in the user table,
1382                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1383                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1384                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1385                         || (isset($contact['forum']) && intval($contact['forum']))
1386                         || (isset($contact['prv']) && intval($contact['prv']))
1387                         || (isset($contact['community']) && intval($contact['community']))
1388                 ) {
1389                         $type = self::TYPE_COMMUNITY;
1390                 } else {
1391                         $type = self::TYPE_PERSON;
1392                 }
1393
1394                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1395                 if (isset($contact["contact-type"])) {
1396                         $type = $contact["contact-type"];
1397                 }
1398
1399                 if (isset($contact["account-type"])) {
1400                         $type = $contact["account-type"];
1401                 }
1402
1403                 switch ($type) {
1404                         case self::TYPE_ORGANISATION:
1405                                 $account_type = DI::l10n()->t("Organisation");
1406                                 break;
1407
1408                         case self::TYPE_NEWS:
1409                                 $account_type = DI::l10n()->t('News');
1410                                 break;
1411
1412                         case self::TYPE_COMMUNITY:
1413                                 $account_type = DI::l10n()->t("Forum");
1414                                 break;
1415
1416                         default:
1417                                 $account_type = "";
1418                                 break;
1419                 }
1420
1421                 return $account_type;
1422         }
1423
1424         /**
1425          * Blocks a contact
1426          *
1427          * @param int $cid
1428          * @return bool
1429          * @throws \Exception
1430          */
1431         public static function block($cid, $reason = null)
1432         {
1433                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1434
1435                 return $return;
1436         }
1437
1438         /**
1439          * Unblocks a contact
1440          *
1441          * @param int $cid
1442          * @return bool
1443          * @throws \Exception
1444          */
1445         public static function unblock($cid)
1446         {
1447                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1448
1449                 return $return;
1450         }
1451
1452         /**
1453          * Ensure that cached avatar exist
1454          *
1455          * @param integer $cid
1456          */
1457         public static function checkAvatarCache(int $cid)
1458         {
1459                 $contact = DBA::selectFirst('contact', ['url', 'avatar', 'photo', 'thumb', 'micro'], ['id' => $cid, 'uid' => 0, 'self' => false]);
1460                 if (!DBA::isResult($contact)) {
1461                         return;
1462                 }
1463
1464                 if (empty($contact['avatar']) || (!empty($contact['photo']) && !empty($contact['thumb']) && !empty($contact['micro']))) {
1465                         return;
1466                 }
1467
1468                 Logger::info('Adding avatar cache', ['id' => $cid, 'contact' => $contact]);
1469
1470                 self::updateAvatar($cid, $contact['avatar'], true);
1471         }
1472
1473         /**
1474          * Return the photo path for a given contact array in the given size
1475          *
1476          * @param array $contact  contact array
1477          * @param string $field   Fieldname of the photo in the contact array
1478          * @param string $size    Size of the avatar picture
1479          * @param string $avatar  Avatar path that is displayed when no photo had been found
1480          * @return string photo path
1481          */
1482         private static function getAvatarPath(array $contact, string $field, string $size, string $avatar)
1483         {
1484                 if (!empty($contact)) {
1485                         $contact = self::checkAvatarCacheByArray($contact);
1486                         if (!empty($contact[$field])) {
1487                                 $avatar = $contact[$field];
1488                         }
1489                 }
1490
1491                 if (empty($avatar)) {
1492                         $avatar = self::getDefaultAvatar([], $size);
1493                 }
1494
1495                 if (Proxy::isLocalImage($avatar)) {
1496                         return $avatar;
1497                 } else {
1498                         return Proxy::proxifyUrl($avatar, false, $size);
1499                 }
1500         }
1501
1502         /**
1503          * Return the photo path for a given contact array
1504          *
1505          * @param array $contact Contact array
1506          * @param string $avatar  Avatar path that is displayed when no photo had been found
1507          * @return string photo path
1508          */
1509         public static function getPhoto(array $contact, string $avatar = '')
1510         {
1511                 return self::getAvatarPath($contact, 'photo', Proxy::SIZE_SMALL, $avatar);
1512         }
1513
1514         /**
1515          * Return the photo path (thumb size) for a given contact array
1516          *
1517          * @param array $contact Contact array
1518          * @param string $avatar  Avatar path that is displayed when no photo had been found
1519          * @return string photo path
1520          */
1521         public static function getThumb(array $contact, string $avatar = '')
1522         {
1523                 return self::getAvatarPath($contact, 'thumb', Proxy::SIZE_THUMB, $avatar);
1524         }
1525
1526         /**
1527          * Return the photo path (micro size) for a given contact array
1528          *
1529          * @param array $contact Contact array
1530          * @param string $avatar  Avatar path that is displayed when no photo had been found
1531          * @return string photo path
1532          */
1533         public static function getMicro(array $contact, string $avatar = '')
1534         {
1535                 return self::getAvatarPath($contact, 'micro', Proxy::SIZE_MICRO, $avatar);
1536         }
1537
1538         /**
1539          * Check the given contact array for avatar cache fields
1540          *
1541          * @param array $contact
1542          * @return array contact array with avatar cache fields
1543          */
1544         private static function checkAvatarCacheByArray(array $contact)
1545         {
1546                 $update = false;
1547                 $contact_fields = [];
1548                 $fields = ['photo', 'thumb', 'micro'];
1549                 foreach ($fields as $field) {
1550                         if (isset($contact[$field])) {
1551                                 $contact_fields[] = $field;
1552                         }
1553                         if (isset($contact[$field]) && empty($contact[$field])) {
1554                                 $update = true;
1555                         }
1556                 }
1557
1558                 if (!$update) {
1559                         return $contact;
1560                 }
1561
1562                 if (!empty($contact['id']) && !empty($contact['avatar'])) {
1563                         self::updateAvatar($contact['id'], $contact['avatar'], true);
1564
1565                         $new_contact = self::getById($contact['id'], $contact_fields);
1566                         if (DBA::isResult($new_contact)) {
1567                                 // We only update the cache fields
1568                                 $contact = array_merge($contact, $new_contact);
1569                         }
1570                 }
1571
1572                 /// add the default avatars if the fields aren't filled
1573                 if (isset($contact['photo']) && empty($contact['photo'])) {
1574                         $contact['photo'] = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1575                 }
1576                 if (isset($contact['thumb']) && empty($contact['thumb'])) {
1577                         $contact['thumb'] = self::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
1578                 }
1579                 if (isset($contact['micro']) && empty($contact['micro'])) {
1580                         $contact['micro'] = self::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
1581                 }
1582
1583                 return $contact;
1584         }
1585
1586         /**
1587          * Fetch the default avatar for the given contact and size
1588          *
1589          * @param array $contact  contact array
1590          * @param string $size    Size of the avatar picture
1591          * @return void
1592          */
1593         public static function getDefaultAvatar(array $contact, string $size)
1594         {
1595                 switch ($size) {
1596                         case Proxy::SIZE_MICRO:
1597                                 $avatar['size'] = 48;
1598                                 $default = self::DEFAULT_AVATAR_MICRO;
1599                                 break;
1600
1601                         case Proxy::SIZE_THUMB:
1602                                 $avatar['size'] = 80;
1603                                 $default = self::DEFAULT_AVATAR_THUMB;
1604                                 break;
1605
1606                         case Proxy::SIZE_SMALL:
1607                         default:
1608                                 $avatar['size'] = 300;
1609                                 $default = self::DEFAULT_AVATAR_PHOTO;
1610                                 break;
1611                 }
1612
1613                 if (!DI::config()->get('system', 'remote_avatar_lookup')) {
1614                         return DI::baseUrl() . $default;
1615                 }
1616
1617                 if (!empty($contact['xmpp'])) {
1618                         $avatar['email'] = $contact['xmpp'];
1619                 } elseif (!empty($contact['addr'])) {
1620                         $avatar['email'] = $contact['addr'];
1621                 } elseif (!empty($contact['url'])) {
1622                         $avatar['email'] = $contact['url'];
1623                 } else {
1624                         return DI::baseUrl() . $default;
1625                 }
1626
1627                 $avatar['url'] = '';
1628                 $avatar['success'] = false;
1629
1630                 Hook::callAll('avatar_lookup', $avatar);
1631
1632                 if ($avatar['success'] && !empty($avatar['url'])) {
1633                         return $avatar['url'];
1634                 }
1635
1636                 return DI::baseUrl() . $default;
1637         }
1638
1639         /**
1640          * Updates the avatar links in a contact only if needed
1641          *
1642          * @param int    $cid          Contact id
1643          * @param string $avatar       Link to avatar picture
1644          * @param bool   $force        force picture update
1645          * @param bool   $create_cache Enforces the creation of cached avatar fields
1646          *
1647          * @return void
1648          * @throws HTTPException\InternalServerErrorException
1649          * @throws HTTPException\NotFoundException
1650          * @throws \ImagickException
1651          */
1652         public static function updateAvatar(int $cid, string $avatar, bool $force = false, bool $create_cache = false)
1653         {
1654                 $contact = DBA::selectFirst('contact', ['uid', 'avatar', 'photo', 'thumb', 'micro', 'xmpp', 'addr', 'nurl', 'url', 'network'],
1655                         ['id' => $cid, 'self' => false]);
1656                 if (!DBA::isResult($contact)) {
1657                         return;
1658                 }
1659
1660                 $uid = $contact['uid'];
1661
1662                 // Only update the cached photo links of public contacts when they already are cached
1663                 if (($uid == 0) && !$force && empty($contact['thumb']) && empty($contact['micro']) && !$create_cache) {
1664                         if ($contact['avatar'] != $avatar) {
1665                                 DBA::update('contact', ['avatar' => $avatar], ['id' => $cid]);
1666                                 Logger::info('Only update the avatar', ['id' => $cid, 'avatar' => $avatar, 'contact' => $contact]);
1667                         }
1668                         return;
1669                 }
1670
1671                 // User contacts use are updated through the public contacts
1672                 if (($uid != 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1673                         $pcid = self::getIdForURL($contact['url'], false);
1674                         if (!empty($pcid)) {
1675                                 Logger::debug('Update the private contact via the public contact', ['id' => $cid, 'uid' => $uid, 'public' => $pcid]);
1676                                 self::updateAvatar($pcid, $avatar, $force, true);
1677                                 return;
1678                         }
1679                 }
1680
1681                 $default_avatar = empty($avatar) || strpos($avatar, self::DEFAULT_AVATAR_PHOTO);
1682
1683                 if ($default_avatar) {
1684                         $avatar = self::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
1685                 }
1686
1687                 if ($default_avatar && Proxy::isLocalImage($avatar)) {
1688                         $fields = ['avatar' => $avatar, 'avatar-date' => DateTimeFormat::utcNow(),
1689                                 'photo' => $avatar,
1690                                 'thumb' => self::getDefaultAvatar($contact, Proxy::SIZE_THUMB),
1691                                 'micro' => self::getDefaultAvatar($contact, Proxy::SIZE_MICRO)];
1692                         Logger::debug('Use default avatar', ['id' => $cid, 'uid' => $uid]);
1693                 }
1694
1695                 // Use the data from the self account
1696                 if (empty($fields)) {
1697                         $local_uid = User::getIdForURL($contact['url']);
1698                         if (!empty($local_uid)) {
1699                                 $fields = self::selectFirst(['avatar', 'avatar-date', 'photo', 'thumb', 'micro'], ['self' => true, 'uid' => $local_uid]);
1700                                 Logger::debug('Use owner data', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1701                         }
1702                 }
1703
1704                 if (empty($fields)) {
1705                         $update = ($contact['avatar'] != $avatar) || $force;
1706
1707                         if (!$update) {
1708                                 $data = [
1709                                         $contact['photo'] ?? '',
1710                                         $contact['thumb'] ?? '',
1711                                         $contact['micro'] ?? '',
1712                                 ];
1713
1714                                 foreach ($data as $image_uri) {
1715                                         $image_rid = Photo::ridFromURI($image_uri);
1716                                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1717                                                 Logger::debug('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1718                                                 $update = true;
1719                                         }
1720                                 }
1721                         }
1722
1723                         if ($update) {
1724                                 $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1725                                 if ($photos) {
1726                                         $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1727                                         $update = !empty($fields);
1728                                         Logger::debug('Created new cached avatars', ['id' => $cid, 'uid' => $uid, 'owner-uid' => $local_uid]);
1729                                 } else {
1730                                         $update = false;
1731                                 }
1732                         }
1733                 } else {
1734                         $update = ($fields['photo'] . $fields['thumb'] . $fields['micro'] != $contact['photo'] . $contact['thumb'] . $contact['micro']) || $force;
1735                 }
1736
1737                 if (!$update) {
1738                         return;
1739                 }
1740
1741                 $cids = [];
1742                 $uids = [];
1743                 if (($uid == 0) && !in_array($contact['network'], [Protocol::FEED, Protocol::MAIL])) {
1744                         // Collect all user contacts of the given public contact
1745                         $personal_contacts = DBA::select('contact', ['id', 'uid'],
1746                                 ["`nurl` = ? AND `id` != ? AND NOT `self`", $contact['nurl'], $cid]);
1747                         while ($personal_contact = DBA::fetch($personal_contacts)) {
1748                                 $cids[] = $personal_contact['id'];
1749                                 $uids[] = $personal_contact['uid'];
1750                         }
1751                         DBA::close($personal_contacts);
1752
1753                         if (!empty($cids)) {
1754                                 // Delete possibly existing cached user contact avatars
1755                                 Photo::delete(['uid' => $uids, 'contact-id' => $cids, 'album' => Photo::CONTACT_PHOTOS]);
1756                         }
1757                 }
1758
1759                 $cids[] = $cid;
1760                 $uids[] = $uid;
1761                 Logger::info('Updating cached contact avatars', ['cid' => $cids, 'uid' => $uids, 'fields' => $fields]);
1762                 DBA::update('contact', $fields, ['id' => $cids]);
1763         }
1764
1765         /**
1766          * Helper function for "updateFromProbe". Updates personal and public contact
1767          *
1768          * @param integer $id      contact id
1769          * @param integer $uid     user id
1770          * @param string  $url     The profile URL of the contact
1771          * @param array   $fields  The fields that are updated
1772          *
1773          * @throws \Exception
1774          */
1775         private static function updateContact($id, $uid, $url, array $fields)
1776         {
1777                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1778                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1779                         return;
1780                 }
1781
1782                 // Search for duplicated contacts and get rid of them
1783                 if (self::removeDuplicates(Strings::normaliseLink($url), $uid)) {
1784                         return;
1785                 }
1786
1787                 // Archive or unarchive the contact.
1788                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1789                 if (!DBA::isResult($contact)) {
1790                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1791                         return;
1792                 }
1793
1794                 if (isset($fields['failed'])) {
1795                         if ($fields['failed']) {
1796                                 self::markForArchival($contact);
1797                         } else {
1798                                 self::unmarkForArchival($contact);
1799                         }
1800                 }
1801
1802                 if ($contact['uid'] != 0) {
1803                         return;
1804                 }
1805
1806                 // Update contact data for all users
1807                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url)];
1808
1809                 $condition['network'] = [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB];
1810                 DBA::update('contact', $fields, $condition);
1811
1812                 // We mustn't set the update fields for OStatus contacts since they are updated in OnePoll
1813                 $condition['network'] = Protocol::OSTATUS;
1814
1815                 // If the contact failed, propagate the update fields to all contacts
1816                 if (empty($fields['failed'])) {
1817                         unset($fields['last-update']);
1818                         unset($fields['success_update']);
1819                         unset($fields['failure_update']);
1820                 }
1821
1822                 if (empty($fields)) {
1823                         return;
1824                 }
1825
1826                 DBA::update('contact', $fields, $condition);
1827         }
1828
1829         /**
1830          * Remove duplicated contacts
1831          *
1832          * @param string  $nurl  Normalised contact url
1833          * @param integer $uid   User id
1834          * @return boolean
1835          * @throws \Exception
1836          */
1837         public static function removeDuplicates(string $nurl, int $uid)
1838         {
1839                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1840                 $count = DBA::count('contact', $condition);
1841                 if ($count <= 1) {
1842                         return false;
1843                 }
1844
1845                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1846                 if (!DBA::isResult($first_contact)) {
1847                         // Shouldn't happen - so we handle it
1848                         return false;
1849                 }
1850
1851                 $first = $first_contact['id'];
1852                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1853                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1854                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1855                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1856                         return false;
1857                 }
1858
1859                 // Find all duplicates
1860                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1861                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1862                 while ($duplicate = DBA::fetch($duplicates)) {
1863                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1864                                 continue;
1865                         }
1866
1867                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1868                 }
1869                 DBA::close($duplicates);
1870                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl]);
1871                 return true;
1872         }
1873
1874         /**
1875          * @param integer $id      contact id
1876          * @param string  $network Optional network we are probing for
1877          * @return boolean
1878          * @throws HTTPException\InternalServerErrorException
1879          * @throws \ImagickException
1880          */
1881         public static function updateFromProbe(int $id, string $network = '')
1882         {
1883                 $contact = DBA::selectFirst('contact', ['uid', 'url'], ['id' => $id]);
1884                 if (!DBA::isResult($contact)) {
1885                         return false;
1886                 }
1887
1888                 $ret = Probe::uri($contact['url'], $network, $contact['uid']);
1889                 return self::updateFromProbeArray($id, $ret);
1890         }
1891
1892         /**
1893          * @param integer $id      contact id
1894          * @param array   $ret     Probed data
1895          * @return boolean
1896          * @throws HTTPException\InternalServerErrorException
1897          * @throws \ImagickException
1898          */
1899         private static function updateFromProbeArray(int $id, array $ret)
1900         {
1901                 /*
1902                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
1903                   This will reliably kill your communication with old Friendica contacts.
1904                  */
1905
1906                 // These fields aren't updated by this routine:
1907                 // 'xmpp', 'sensitive'
1908
1909                 $fields = ['uid', 'avatar', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe', 'manually-approve',
1910                         'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
1911                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey', 'last-item'];
1912                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
1913                 if (!DBA::isResult($contact)) {
1914                         return false;
1915                 }
1916
1917                 $uid = $contact['uid'];
1918                 unset($contact['uid']);
1919
1920                 $pubkey = $contact['pubkey'];
1921                 unset($contact['pubkey']);
1922
1923                 $contact['photo'] = $contact['avatar'];
1924                 unset($contact['avatar']);
1925
1926                 $updated = DateTimeFormat::utcNow();
1927
1928                 // We must not try to update relay contacts via probe. They are no real contacts.
1929                 // We check after the probing to be able to correct falsely detected contact types.
1930                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
1931                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
1932                         self::updateContact($id, $uid, $contact['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
1933                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
1934                         return true;
1935                 }
1936
1937                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
1938                 if (in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]) && ($ret['network'] != $contact['network'])) {
1939                         self::updateContact($id, $uid, $ret['url'], ['failed' => true, 'last-update' => $updated, 'failure_update' => $updated]);
1940                         return false;
1941                 }
1942
1943                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
1944                         $ret['unsearchable'] = $ret['hide'];
1945                 }
1946
1947                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
1948                         $ret['forum'] = false;
1949                         $ret['prv'] = false;
1950                         $ret['contact-type'] = $ret['account-type'];
1951                         if (($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && isset($ret['manually-approve'])) {
1952                                 $ret['forum'] = (bool)!$ret['manually-approve'];
1953                                 $ret['prv'] = (bool)!$ret['forum'];
1954                         }
1955                 }
1956
1957                 $new_pubkey = $ret['pubkey'] ?? '';
1958
1959                 if ($uid == 0) {
1960                         $ret['last-item'] = Probe::getLastUpdate($ret);
1961                         Logger::info('Fetched last item', ['id' => $id, 'probed_url' => $ret['url'], 'last-item' => $ret['last-item'], 'callstack' => System::callstack(20)]);
1962                 }
1963
1964                 $update = false;
1965
1966                 // make sure to not overwrite existing values with blank entries except some technical fields
1967                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
1968                 foreach ($ret as $key => $val) {
1969                         if (!array_key_exists($key, $contact)) {
1970                                 unset($ret[$key]);
1971                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
1972                                 $ret[$key] = $contact[$key];
1973                         } elseif ($ret[$key] != $contact[$key]) {
1974                                 $update = true;
1975                         }
1976                 }
1977
1978                 if (!empty($ret['last-item']) && ($contact['last-item'] < $ret['last-item'])) {
1979                         $update = true;
1980                 } else {
1981                         unset($ret['last-item']);
1982                 }
1983
1984                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
1985                         self::updateAvatar($id, $ret['photo'], $update);
1986                 }
1987
1988                 if (!$update) {
1989                         self::updateContact($id, $uid, $ret['url'], ['failed' => false, 'last-update' => $updated, 'success_update' => $updated]);
1990
1991                         if (Contact\Relation::isDiscoverable($ret['url'])) {
1992                                 Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
1993                         }
1994
1995                         // Update the public contact
1996                         if ($uid != 0) {
1997                                 $contact = self::getByURL($ret['url'], false, ['id']);
1998                                 if (!empty($contact['id'])) {
1999                                         self::updateFromProbeArray($contact['id'], $ret);
2000                                 }
2001                         }
2002
2003                         return true;
2004                 }
2005
2006                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2007                 $ret['updated'] = $updated;
2008                 $ret['failed'] = false;
2009
2010                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2011                 if (empty($pubkey) && !empty($new_pubkey)) {
2012                         $ret['pubkey'] = $new_pubkey;
2013                 }
2014
2015                 if ((!empty($ret['addr']) && ($ret['addr'] != $contact['addr'])) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2016                         $ret['uri-date'] = DateTimeFormat::utcNow();
2017                 }
2018
2019                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2020                         $ret['name-date'] = $updated;
2021                 }
2022
2023                 if (($uid == 0) || in_array($ret['network'], [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2024                         $ret['last-update'] = $updated;
2025                         $ret['success_update'] = $updated;
2026                 }
2027
2028                 unset($ret['photo']);
2029
2030                 self::updateContact($id, $uid, $ret['url'], $ret);
2031
2032                 if (Contact\Relation::isDiscoverable($ret['url'])) {
2033                         Worker::add(PRIORITY_LOW, 'ContactDiscovery', $ret['url']);
2034                 }
2035
2036                 return true;
2037         }
2038
2039         /**
2040          * @param integer $url contact url
2041          * @return integer Contact id
2042          * @throws HTTPException\InternalServerErrorException
2043          * @throws \ImagickException
2044          */
2045         public static function updateFromProbeByURL($url)
2046         {
2047                 $id = self::getIdForURL($url);
2048
2049                 if (empty($id)) {
2050                         return $id;
2051                 }
2052
2053                 self::updateFromProbe($id);
2054
2055                 return $id;
2056         }
2057
2058         /**
2059          * Detects if a given contact array belongs to a legacy DFRN connection
2060          *
2061          * @param array $contact
2062          * @return boolean
2063          */
2064         public static function isLegacyDFRNContact($contact)
2065         {
2066                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2067                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2068         }
2069
2070         /**
2071          * Detects the communication protocol for a given contact url.
2072          * This is used to detect Friendica contacts that we can communicate via AP.
2073          *
2074          * @param string $url contact url
2075          * @param string $network Network of that contact
2076          * @return string with protocol
2077          */
2078         public static function getProtocol($url, $network)
2079         {
2080                 if ($network != Protocol::DFRN) {
2081                         return $network;
2082                 }
2083
2084                 $apcontact = APContact::getByURL($url);
2085                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2086                         return Protocol::ACTIVITYPUB;
2087                 } else {
2088                         return $network;
2089                 }
2090         }
2091
2092         /**
2093          * Takes a $uid and a url/handle and adds a new contact
2094          *
2095          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2096          * dfrn_request page.
2097          *
2098          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2099          *
2100          * Returns an array
2101          * $return['success'] boolean true if successful
2102          * $return['message'] error text if success is false.
2103          *
2104          * Takes a $uid and a url/handle and adds a new contact
2105          *
2106          * @param array  $user        The user the contact should be created for
2107          * @param string $url         The profile URL of the contact
2108          * @param bool   $interactive
2109          * @param string $network
2110          * @return array
2111          * @throws HTTPException\InternalServerErrorException
2112          * @throws HTTPException\NotFoundException
2113          * @throws \ImagickException
2114          */
2115         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2116         {
2117                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2118
2119                 // remove ajax junk, e.g. Twitter
2120                 $url = str_replace('/#!/', '/', $url);
2121
2122                 if (!Network::isUrlAllowed($url)) {
2123                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2124                         return $result;
2125                 }
2126
2127                 if (Network::isUrlBlocked($url)) {
2128                         $result['message'] = DI::l10n()->t('Blocked domain');
2129                         return $result;
2130                 }
2131
2132                 if (!$url) {
2133                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2134                         return $result;
2135                 }
2136
2137                 $arr = ['url' => $url, 'contact' => []];
2138
2139                 Hook::callAll('follow', $arr);
2140
2141                 if (empty($arr)) {
2142                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2143                         return $result;
2144                 }
2145
2146                 if (!empty($arr['contact']['name'])) {
2147                         $ret = $arr['contact'];
2148                 } else {
2149                         $ret = Probe::uri($url, $network, $user['uid']);
2150                 }
2151
2152                 if (($network != '') && ($ret['network'] != $network)) {
2153                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2154                         return $result;
2155                 }
2156
2157                 // check if we already have a contact
2158                 // the poll url is more reliable than the profile url, as we may have
2159                 // indirect links or webfinger links
2160
2161                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2162                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2163                 if (!DBA::isResult($contact)) {
2164                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2165                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2166                 }
2167
2168                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2169
2170                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2171                         if ($interactive) {
2172                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2173                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2174                                 } else {
2175                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2176                                 }
2177
2178                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2179
2180                                 // NOTREACHED
2181                         }
2182                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2183                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2184                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2185                         return $result;
2186                 }
2187
2188                 // This extra param just confuses things, remove it
2189                 if ($protocol === Protocol::DIASPORA) {
2190                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2191                 }
2192
2193                 // do we have enough information?
2194                 if (empty($protocol) || ($protocol == Protocol::PHANTOM) || (empty($ret['url']) && empty($ret['addr']))) {
2195                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2196                         if (empty($ret['poll'])) {
2197                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2198                         }
2199                         if (empty($ret['name'])) {
2200                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2201                         }
2202                         if (empty($ret['url'])) {
2203                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2204                         }
2205                         if (strpos($ret['url'], '@') !== false) {
2206                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2207                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2208                         }
2209                         return $result;
2210                 }
2211
2212                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2213                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2214                         $ret['notify'] = '';
2215                 }
2216
2217                 if (!$ret['notify']) {
2218                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2219                 }
2220
2221                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2222
2223                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2224
2225                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2226
2227                 $pending = false;
2228                 if (($protocol == Protocol::ACTIVITYPUB) && isset($ret['manually-approve'])) {
2229                         $pending = (bool)$ret['manually-approve'];
2230                 }
2231
2232                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2233                         $writeable = 1;
2234                 }
2235
2236                 if (DBA::isResult($contact)) {
2237                         // update contact
2238                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2239
2240                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2241                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2242                 } else {
2243                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2244
2245                         // create contact record
2246                         self::insert([
2247                                 'uid'     => $user['uid'],
2248                                 'created' => DateTimeFormat::utcNow(),
2249                                 'url'     => $ret['url'],
2250                                 'nurl'    => Strings::normaliseLink($ret['url']),
2251                                 'addr'    => $ret['addr'],
2252                                 'alias'   => $ret['alias'],
2253                                 'batch'   => $ret['batch'],
2254                                 'notify'  => $ret['notify'],
2255                                 'poll'    => $ret['poll'],
2256                                 'poco'    => $ret['poco'],
2257                                 'name'    => $ret['name'],
2258                                 'nick'    => $ret['nick'],
2259                                 'network' => $ret['network'],
2260                                 'baseurl' => $ret['baseurl'],
2261                                 'gsid'    => $ret['gsid'] ?? null,
2262                                 'protocol' => $protocol,
2263                                 'pubkey'  => $ret['pubkey'],
2264                                 'rel'     => $new_relation,
2265                                 'priority'=> $ret['priority'],
2266                                 'writable'=> $writeable,
2267                                 'hidden'  => $hidden,
2268                                 'blocked' => 0,
2269                                 'readonly'=> 0,
2270                                 'pending' => $pending,
2271                                 'subhub'  => $subhub
2272                         ]);
2273                 }
2274
2275                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2276                 if (!DBA::isResult($contact)) {
2277                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2278                         return $result;
2279                 }
2280
2281                 $contact_id = $contact['id'];
2282                 $result['cid'] = $contact_id;
2283
2284                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2285
2286                 // Update the avatar
2287                 self::updateAvatar($contact_id, $ret['photo']);
2288
2289                 // pull feed and consume it, which should subscribe to the hub.
2290                 if ($contact['network'] == Protocol::OSTATUS) {
2291                         Worker::add(PRIORITY_HIGH, 'OnePoll', $contact_id, 'force');
2292                 } else {
2293                         Worker::add(PRIORITY_HIGH, 'UpdateContact', $contact_id);
2294                 }
2295
2296                 $owner = User::getOwnerDataById($user['uid']);
2297
2298                 if (DBA::isResult($owner)) {
2299                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2300                                 // create a follow slap
2301                                 $item = [];
2302                                 $item['verb'] = Activity::FOLLOW;
2303                                 $item['gravity'] = GRAVITY_ACTIVITY;
2304                                 $item['follow'] = $contact["url"];
2305                                 $item['body'] = '';
2306                                 $item['title'] = '';
2307                                 $item['guid'] = '';
2308                                 $item['uri-id'] = 0;
2309
2310                                 $slap = OStatus::salmon($item, $owner);
2311
2312                                 if (!empty($contact['notify'])) {
2313                                         Salmon::slapper($owner, $contact['notify'], $slap);
2314                                 }
2315                         } elseif ($protocol == Protocol::DIASPORA) {
2316                                 $ret = Diaspora::sendShare($owner, $contact);
2317                                 Logger::log('share returns: ' . $ret);
2318                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2319                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2320                                 if (empty($activity_id)) {
2321                                         // This really should never happen
2322                                         return false;
2323                                 }
2324
2325                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2326                                 Logger::log('Follow returns: ' . $ret);
2327                         }
2328                 }
2329
2330                 $result['success'] = true;
2331                 return $result;
2332         }
2333
2334         /**
2335          * Updated contact's SSL policy
2336          *
2337          * @param array  $contact    Contact array
2338          * @param string $new_policy New policy, valid: self,full
2339          *
2340          * @return array Contact array with updated values
2341          * @throws \Exception
2342          */
2343         public static function updateSslPolicy(array $contact, $new_policy)
2344         {
2345                 $ssl_changed = false;
2346                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2347                         $ssl_changed = true;
2348                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2349                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2350                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2351                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2352                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2353                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2354                 }
2355
2356                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2357                         $ssl_changed = true;
2358                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2359                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2360                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2361                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2362                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2363                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2364                 }
2365
2366                 if ($ssl_changed) {
2367                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2368                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2369                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2370                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2371                 }
2372
2373                 return $contact;
2374         }
2375
2376         /**
2377          * @param array  $importer Owner (local user) data
2378          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2379          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2380          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2381          * @param string $note     Introduction additional message
2382          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2383          * @throws HTTPException\InternalServerErrorException
2384          * @throws \ImagickException
2385          */
2386         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2387         {
2388                 // Should always be set
2389                 if (empty($datarray['author-id'])) {
2390                         return false;
2391                 }
2392
2393                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2394                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2395                 if (!DBA::isResult($pub_contact)) {
2396                         // Should never happen
2397                         return false;
2398                 }
2399
2400                 // Contact is blocked at node-level
2401                 if (self::isBlocked($datarray['author-id'])) {
2402                         return false;
2403                 }
2404
2405                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2406                 $name = $pub_contact['name'];
2407                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2408                 $nick = $pub_contact['nick'];
2409                 $network = $pub_contact['network'];
2410
2411                 // Ensure that we don't create a new contact when there already is one
2412                 $cid = self::getIdForURL($url, $importer['uid']);
2413                 if (!empty($cid)) {
2414                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2415                 }
2416
2417                 if (!empty($contact)) {
2418                         if (!empty($contact['pending'])) {
2419                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2420                                 return null;
2421                         }
2422
2423                         // Contact is blocked at user-level
2424                         if (!empty($contact['id']) && !empty($importer['id']) &&
2425                                 Contact\User::isBlocked($contact['id'], $importer['id'])) {
2426                                 return false;
2427                         }
2428
2429                         // Make sure that the existing contact isn't archived
2430                         self::unmarkForArchival($contact);
2431
2432                         if (($contact['rel'] == self::SHARING)
2433                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2434                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2435                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2436                         }
2437
2438                         // Ensure to always have the correct network type, independent from the connection request method
2439                         self::updateFromProbe($contact['id']);
2440
2441                         return true;
2442                 } else {
2443                         // send email notification to owner?
2444                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2445                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2446                                 return null;
2447                         }
2448
2449                         // create contact record
2450                         DBA::insert('contact', [
2451                                 'uid'      => $importer['uid'],
2452                                 'created'  => DateTimeFormat::utcNow(),
2453                                 'url'      => $url,
2454                                 'nurl'     => Strings::normaliseLink($url),
2455                                 'name'     => $name,
2456                                 'nick'     => $nick,
2457                                 'network'  => $network,
2458                                 'rel'      => self::FOLLOWER,
2459                                 'blocked'  => 0,
2460                                 'readonly' => 0,
2461                                 'pending'  => 1,
2462                                 'writable' => 1,
2463                         ]);
2464
2465                         $contact_id = DBA::lastInsertId();
2466
2467                         // Ensure to always have the correct network type, independent from the connection request method
2468                         self::updateFromProbe($contact_id);
2469
2470                         self::updateAvatar($contact_id, $photo, true);
2471
2472                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2473
2474                         /// @TODO Encapsulate this into a function/method
2475                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2476                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2477                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2478                                 // create notification
2479                                 $hash = Strings::getRandomHex();
2480
2481                                 if (is_array($contact_record)) {
2482                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2483                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2484                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2485                                 }
2486
2487                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2488
2489                                 if (($user['notify-flags'] & Type::INTRO) &&
2490                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2491
2492                                         notification([
2493                                                 'type'  => Type::INTRO,
2494                                                 'otype' => Notify\ObjectType::INTRO,
2495                                                 'verb'  => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2496                                                 'uid'   => $user['uid'],
2497                                                 'cid'   => $contact_record['id'],
2498                                                 'link'  => DI::baseUrl() . '/notifications/intros',
2499                                         ]);
2500                                 }
2501                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2502                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2503                                         self::createFromProbe($importer, $url, false, $network);
2504                                 }
2505
2506                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2507                                 $fields = ['pending' => false];
2508                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2509                                         $fields['rel'] = self::FRIEND;
2510                                 }
2511
2512                                 DBA::update('contact', $fields, $condition);
2513
2514                                 return true;
2515                         }
2516                 }
2517
2518                 return null;
2519         }
2520
2521         public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
2522         {
2523                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2524                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2525                 } else {
2526                         self::remove($contact['id']);
2527                 }
2528         }
2529
2530         public static function removeSharer($importer, $contact, array $datarray = [], $item = "")
2531         {
2532                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2533                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2534                 } else {
2535                         self::remove($contact['id']);
2536                 }
2537         }
2538
2539         /**
2540          * Create a birthday event.
2541          *
2542          * Update the year and the birthday.
2543          */
2544         public static function updateBirthdays()
2545         {
2546                 $condition = [
2547                         '`bd` != ""
2548                         AND `bd` > "0001-01-01"
2549                         AND SUBSTRING(`bd`, 1, 4) != `bdyear`
2550                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2551                         AND NOT `contact`.`pending`
2552                         AND NOT `contact`.`hidden`
2553                         AND NOT `contact`.`blocked`
2554                         AND NOT `contact`.`archive`
2555                         AND NOT `contact`.`deleted`',
2556                         self::SHARING,
2557                         self::FRIEND
2558                 ];
2559
2560                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2561
2562                 while ($contact = DBA::fetch($contacts)) {
2563                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2564
2565                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2566
2567                         if (Event::createBirthday($contact, $nextbd)) {
2568                                 // update bdyear
2569                                 DBA::update(
2570                                         'contact',
2571                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2572                                         ['id' => $contact['id']]
2573                                 );
2574                         }
2575                 }
2576                 DBA::close($contacts);
2577         }
2578
2579         /**
2580          * Remove the unavailable contact ids from the provided list
2581          *
2582          * @param array $contact_ids Contact id list
2583          * @return array
2584          * @throws \Exception
2585          */
2586         public static function pruneUnavailable(array $contact_ids)
2587         {
2588                 if (empty($contact_ids)) {
2589                         return [];
2590                 }
2591
2592                 $contacts = self::selectToArray(['id'], [
2593                         'id'      => $contact_ids,
2594                         'blocked' => false,
2595                         'pending' => false,
2596                         'archive' => false,
2597                 ]);
2598
2599                 return array_column($contacts, 'id');
2600         }
2601
2602         /**
2603          * Returns a magic link to authenticate remote visitors
2604          *
2605          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2606          *
2607          * @param string $contact_url The address of the target contact profile
2608          * @param string $url         An url that we will be redirected to after the authentication
2609          *
2610          * @return string with "redir" link
2611          * @throws HTTPException\InternalServerErrorException
2612          * @throws \ImagickException
2613          */
2614         public static function magicLink($contact_url, $url = '')
2615         {
2616                 if (!Session::isAuthenticated()) {
2617                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2618                 }
2619
2620                 $contact = self::getByURL($contact_url, false);
2621                 if (empty($contact)) {
2622                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2623                 }
2624
2625                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2626                 unset($contact['uid']);
2627
2628                 return self::magicLinkByContact($contact, $url ?: $contact_url);
2629         }
2630
2631         /**
2632          * Returns a magic link to authenticate remote visitors
2633          *
2634          * @param integer $cid The contact id of the target contact profile
2635          * @param string  $url An url that we will be redirected to after the authentication
2636          *
2637          * @return string with "redir" link
2638          * @throws HTTPException\InternalServerErrorException
2639          * @throws \ImagickException
2640          */
2641         public static function magicLinkbyId($cid, $url = '')
2642         {
2643                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2644
2645                 return self::magicLinkByContact($contact, $url);
2646         }
2647
2648         /**
2649          * Returns a magic link to authenticate remote visitors
2650          *
2651          * @param array  $contact The contact array with "uid", "network" and "url"
2652          * @param string $url     An url that we will be redirected to after the authentication
2653          *
2654          * @return string with "redir" link
2655          * @throws HTTPException\InternalServerErrorException
2656          * @throws \ImagickException
2657          */
2658         public static function magicLinkByContact($contact, $url = '')
2659         {
2660                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2661
2662                 if (!Session::isAuthenticated()) {
2663                         return $destination;
2664                 }
2665
2666                 // Only redirections to the same host do make sense
2667                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2668                         return $url;
2669                 }
2670
2671                 if (DI::pConfig()->get(local_user(), 'system', 'stay_local') && ($url == '')) {
2672                         return 'contact/' . $contact['id'] . '/conversations';
2673                 }
2674
2675                 if ($contact['network'] != Protocol::DFRN) {
2676                         return $destination;
2677                 }
2678
2679                 if (!empty($contact['uid'])) {
2680                         return self::magicLink($contact['url'], $url);
2681                 }
2682
2683                 if (empty($contact['id'])) {
2684                         return $destination;
2685                 }
2686
2687                 $redirect = 'redir/' . $contact['id'];
2688
2689                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2690                         $redirect .= '?url=' . $url;
2691                 }
2692
2693                 return $redirect;
2694         }
2695
2696         /**
2697          * Is the contact a forum?
2698          *
2699          * @param integer $contactid ID of the contact
2700          *
2701          * @return boolean "true" if it is a forum
2702          */
2703         public static function isForum($contactid)
2704         {
2705                 $fields = ['forum', 'prv'];
2706                 $condition = ['id' => $contactid];
2707                 $contact = DBA::selectFirst('contact', $fields, $condition);
2708                 if (!DBA::isResult($contact)) {
2709                         return false;
2710                 }
2711
2712                 // Is it a forum?
2713                 return ($contact['forum'] || $contact['prv']);
2714         }
2715
2716         /**
2717          * Can the remote contact receive private messages?
2718          *
2719          * @param array $contact
2720          * @return bool
2721          */
2722         public static function canReceivePrivateMessages(array $contact)
2723         {
2724                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2725                 $self = $contact['self'] ?? false;
2726
2727                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2728         }
2729
2730         /**
2731          * Search contact table by nick or name
2732          *
2733          * @param string $search Name or nick
2734          * @param string $mode   Search mode (e.g. "community")
2735          *
2736          * @return array with search results
2737          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2738          */
2739         public static function searchByName($search, $mode = '')
2740         {
2741                 if (empty($search)) {
2742                         return [];
2743                 }
2744
2745                 // check supported networks
2746                 if (DI::config()->get('system', 'diaspora_enabled')) {
2747                         $diaspora = Protocol::DIASPORA;
2748                 } else {
2749                         $diaspora = Protocol::DFRN;
2750                 }
2751
2752                 if (!DI::config()->get('system', 'ostatus_disabled')) {
2753                         $ostatus = Protocol::OSTATUS;
2754                 } else {
2755                         $ostatus = Protocol::DFRN;
2756                 }
2757
2758                 // check if we search only communities or every contact
2759                 if ($mode === 'community') {
2760                         $extra_sql = sprintf(' AND `contact-type` = %d', self::TYPE_COMMUNITY);
2761                 } else {
2762                         $extra_sql = '';
2763                 }
2764
2765                 $search .= '%';
2766
2767                 $results = DBA::p("SELECT * FROM `contact`
2768                         WHERE NOT `unsearchable` AND `network` IN (?, ?, ?, ?) AND
2769                                 NOT `failed` AND `uid` = ? AND
2770                                 (`addr` LIKE ? OR `name` LIKE ? OR `nick` LIKE ?) $extra_sql
2771                                 ORDER BY `nurl` DESC LIMIT 1000",
2772                         Protocol::DFRN, Protocol::ACTIVITYPUB, $ostatus, $diaspora, 0, $search, $search, $search
2773                 );
2774
2775                 $contacts = DBA::toArray($results);
2776                 return $contacts;
2777         }
2778
2779         /**
2780          * Add public contacts from an array
2781          *
2782          * @param array $urls
2783          * @return array result "count", "added" and "updated"
2784          */
2785         public static function addByUrls(array $urls)
2786         {
2787                 $added = 0;
2788                 $updated = 0;
2789                 $unchanged = 0;
2790                 $count = 0;
2791
2792                 foreach ($urls as $url) {
2793                         $contact = self::getByURL($url, false, ['id', 'updated']);
2794                         if (empty($contact['id'])) {
2795                                 Worker::add(PRIORITY_LOW, 'AddContact', 0, $url);
2796                                 ++$added;
2797                         } elseif ($contact['updated'] < DateTimeFormat::utc('now -7 days')) {
2798                                 Worker::add(PRIORITY_LOW, 'UpdateContact', $contact['id']);
2799                                 ++$updated;
2800                         } else {
2801                                 ++$unchanged;
2802                         }
2803                         ++$count;
2804                 }
2805
2806                 return ['count' => $count, 'added' => $added, 'updated' => $updated, 'unchanged' => $unchanged];
2807         }
2808
2809         /**
2810          * Returns a random, global contact of the current node
2811          *
2812          * @return string The profile URL
2813          * @throws Exception
2814          */
2815         public static function getRandomUrl()
2816         {
2817                 $r = DBA::selectFirst('contact', ['url'], [
2818                         "`uid` = ? AND `network` = ? AND NOT `failed` AND `last-item` > ?",
2819                         0, Protocol::DFRN, DateTimeFormat::utc('now - 1 month'),
2820                 ], ['order' => ['RAND()']]);
2821
2822                 if (DBA::isResult($r)) {
2823                         return $r['url'];
2824                 }
2825
2826                 return '';
2827         }
2828 }