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\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Session;
  30 use Friendica\Core\System;
  31 use Friendica\Core\Worker;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Model\Notify\Type;
  35 use Friendica\Network\HTTPException;
  36 use Friendica\Network\Probe;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\DFRN;
  40 use Friendica\Protocol\Diaspora;
  41 use Friendica\Protocol\OStatus;
  42 use Friendica\Protocol\Salmon;
  43 use Friendica\Util\DateTimeFormat;
  44 use Friendica\Util\Images;
  45 use Friendica\Util\Network;
  46 use Friendica\Util\Strings;
  47
  48 /**
  49  * functions for interacting with a contact
  50  */
  51 class Contact
  52 {
  53         /**
  54          * @deprecated since version 2019.03
  55          * @see User::PAGE_FLAGS_NORMAL
  56          */
  57         const PAGE_NORMAL    = User::PAGE_FLAGS_NORMAL;
  58         /**
  59          * @deprecated since version 2019.03
  60          * @see User::PAGE_FLAGS_SOAPBOX
  61          */
  62         const PAGE_SOAPBOX   = User::PAGE_FLAGS_SOAPBOX;
  63         /**
  64          * @deprecated since version 2019.03
  65          * @see User::PAGE_FLAGS_COMMUNITY
  66          */
  67         const PAGE_COMMUNITY = User::PAGE_FLAGS_COMMUNITY;
  68         /**
  69          * @deprecated since version 2019.03
  70          * @see User::PAGE_FLAGS_FREELOVE
  71          */
  72         const PAGE_FREELOVE  = User::PAGE_FLAGS_FREELOVE;
  73         /**
  74          * @deprecated since version 2019.03
  75          * @see User::PAGE_FLAGS_BLOG
  76          */
  77         const PAGE_BLOG      = User::PAGE_FLAGS_BLOG;
  78         /**
  79          * @deprecated since version 2019.03
  80          * @see User::PAGE_FLAGS_PRVGROUP
  81          */
  82         const PAGE_PRVGROUP  = User::PAGE_FLAGS_PRVGROUP;
  83         /**
  84          * @}
  85          */
  86
  87         /**
  88          * Account types
  89          *
  90          * TYPE_UNKNOWN - the account has been imported from gcontact where this is the default type value
  91          *
  92          * TYPE_PERSON - the account belongs to a person
  93          *      Associated page types: PAGE_NORMAL, PAGE_SOAPBOX, PAGE_FREELOVE
  94          *
  95          * TYPE_ORGANISATION - the account belongs to an organisation
  96          *      Associated page type: PAGE_SOAPBOX
  97          *
  98          * TYPE_NEWS - the account is a news reflector
  99          *      Associated page type: PAGE_SOAPBOX
 100          *
 101          * TYPE_COMMUNITY - the account is community forum
 102          *      Associated page types: PAGE_COMMUNITY, PAGE_PRVGROUP
 103          *
 104          * TYPE_RELAY - the account is a relay
 105          *      This will only be assigned to contacts, not to user accounts
 106          * @{
 107          */
 108         const TYPE_UNKNOWN =     -1;
 109         const TYPE_PERSON =       User::ACCOUNT_TYPE_PERSON;
 110         const TYPE_ORGANISATION = User::ACCOUNT_TYPE_ORGANISATION;
 111         const TYPE_NEWS =         User::ACCOUNT_TYPE_NEWS;
 112         const TYPE_COMMUNITY =    User::ACCOUNT_TYPE_COMMUNITY;
 113         const TYPE_RELAY =        User::ACCOUNT_TYPE_RELAY;
 114         /**
 115          * @}
 116          */
 117
 118         /**
 119          * Contact_is
 120          *
 121          * Relationship types
 122          * @{
 123          */
 124         const FOLLOWER = 1;
 125         const SHARING  = 2;
 126         const FRIEND   = 3;
 127         /**
 128          * @}
 129          */
 130
 131         /**
 132          * @param array $fields    Array of selected fields, empty for all
 133          * @param array $condition Array of fields for condition
 134          * @param array $params    Array of several parameters
 135          * @return array
 136          * @throws \Exception
 137          */
 138         public static function selectToArray(array $fields = [], array $condition = [], array $params = [])
 139         {
 140                 return DBA::selectToArray('contact', $fields, $condition, $params);
 141         }
 142
 143         /**
 144          * @param array $fields    Array of selected fields, empty for all
 145          * @param array $condition Array of fields for condition
 146          * @param array $params    Array of several parameters
 147          * @return array
 148          * @throws \Exception
 149          */
 150         public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
 151         {
 152                 $contact = DBA::selectFirst('contact', $fields, $condition, $params);
 153
 154                 return $contact;
 155         }
 156
 157         /**
 158          * Insert a row into the contact table
 159          * Important: You can't use DBA::lastInsertId() after this call since it will be set to 0.
 160          *
 161          * @param array        $fields              field array
 162          * @param bool         $on_duplicate_update Do an update on a duplicate entry
 163          *
 164          * @return boolean was the insert successful?
 165          * @throws \Exception
 166          */
 167         public static function insert(array $fields, bool $on_duplicate_update = false)
 168         {
 169                 $ret = DBA::insert('contact', $fields, $on_duplicate_update);
 170                 $contact = DBA::selectFirst('contact', ['nurl', 'uid'], ['id' => DBA::lastInsertId()]);
 171                 if (!DBA::isResult($contact)) {
 172                         // Shouldn't happen
 173                         return $ret;
 174                 }
 175
 176                 // Search for duplicated contacts and get rid of them
 177                 self::removeDuplicates($contact['nurl'], $contact['uid']);
 178
 179                 return $ret;
 180         }
 181
 182         /**
 183          * @param integer $id     Contact ID
 184          * @param array   $fields Array of selected fields, empty for all
 185          * @return array|boolean Contact record if it exists, false otherwise
 186          * @throws \Exception
 187          */
 188         public static function getById($id, $fields = [])
 189         {
 190                 return DBA::selectFirst('contact', $fields, ['id' => $id]);
 191         }
 192
 193         /**
 194          * Fetches a contact by a given url
 195          *
 196          * @param string  $url    profile url
 197          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 198          * @param array   $fields Field list
 199          * @param integer $uid    User ID of the contact
 200          * @return array contact array
 201          */
 202         public static function getByURL(string $url, $update = null, array $fields = [], int $uid = 0)
 203         {
 204                 if ($update || is_null($update)) {
 205                         $cid = self::getIdForURL($url, $uid, $update);
 206                         if (empty($cid)) {
 207                                 return [];
 208                         }
 209                         return self::getById($cid, $fields);
 210                 }
 211
 212                 // Add internal fields
 213                 $removal = [];
 214                 if (!empty($fields)) {
 215                         foreach (['id', 'updated', 'network'] as $internal) {
 216                                 if (!in_array($internal, $fields)) {
 217                                         $fields[] = $internal;
 218                                         $removal[] = $internal;
 219                                 }
 220                         }
 221                 }
 222
 223                 // We first try the nurl (http://server.tld/nick), most common case
 224                 $options = ['order' => ['id']];
 225                 $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false], $options);
 226
 227                 // Then the addr (nick@server.tld)
 228                 if (!DBA::isResult($contact)) {
 229                         $contact = DBA::selectFirst('contact', $fields, ['addr' => str_replace('acct:', '', $url), 'uid' => $uid, 'deleted' => false], $options);
 230                 }
 231
 232                 // Then the alias (which could be anything)
 233                 if (!DBA::isResult($contact)) {
 234                         // The link could be provided as http although we stored it as https
 235                         $ssl_url = str_replace('http://', 'https://', $url);
 236                         $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
 237                         $contact = DBA::selectFirst('contact', $fields, $condition, $options);
 238                 }
 239
 240                 // Update the contact in the background if needed
 241                 if ((($contact['updated'] < DateTimeFormat::utc('now -7 days')) || empty($contact['avatar'])) &&
 242                         in_array($contact['network'], Protocol::FEDERATED)) {
 243                         Worker::add(PRIORITY_LOW, "UpdateContact", $contact['id'], ($uid == 0 ? 'force' : ''));
 244                 }
 245
 246                 // Remove the internal fields
 247                 foreach ($removal as $internal) {
 248                         unset($contact[$internal]);
 249                 }
 250
 251                 return $contact;
 252         }
 253
 254         /**
 255          * Fetches a contact for a given user by a given url.
 256          * In difference to "getByURL" the function will fetch a public contact when no user contact had been found.
 257          *
 258          * @param string  $url    profile url
 259          * @param integer $uid    User ID of the contact
 260          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 261          * @param array   $fields Field list
 262          * @return array contact array
 263          */
 264         public static function getByURLForUser(string $url, int $uid = 0, $update = false, array $fields = [])
 265         {
 266                 if ($uid != 0) {
 267                         $contact = self::getByURL($url, $update, $fields, $uid);
 268                         if (!empty($contact)) {
 269                                 if (!empty($contact['id'])) {
 270                                         $contact['cid'] = $contact['id'];
 271                                         $contact['zid'] = 0;
 272                                 }
 273                                 return $contact;
 274                         }
 275                 }
 276
 277                 $contact = self::getByURL($url, $update, $fields);
 278                 if (!empty($contact['id'])) {
 279                         $contact['cid'] = 0;
 280                         $contact['zid'] = $contact['id'];
 281                 }
 282                 return $contact;
 283         }
 284
 285         /**
 286          * Tests if the given contact is a follower
 287          *
 288          * @param int $cid Either public contact id or user's contact id
 289          * @param int $uid User ID
 290          *
 291          * @return boolean is the contact id a follower?
 292          * @throws HTTPException\InternalServerErrorException
 293          * @throws \ImagickException
 294          */
 295         public static function isFollower($cid, $uid)
 296         {
 297                 if (self::isBlockedByUser($cid, $uid)) {
 298                         return false;
 299                 }
 300
 301                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 302                 if (empty($cdata['user'])) {
 303                         return false;
 304                 }
 305
 306                 $condition = ['id' => $cdata['user'], 'rel' => [self::FOLLOWER, self::FRIEND]];
 307                 return DBA::exists('contact', $condition);
 308         }
 309
 310         /**
 311          * Tests if the given contact url is a follower
 312          *
 313          * @param string $url Contact URL
 314          * @param int    $uid User ID
 315          *
 316          * @return boolean is the contact id a follower?
 317          * @throws HTTPException\InternalServerErrorException
 318          * @throws \ImagickException
 319          */
 320         public static function isFollowerByURL($url, $uid)
 321         {
 322                 $cid = self::getIdForURL($url, $uid, false);
 323
 324                 if (empty($cid)) {
 325                         return false;
 326                 }
 327
 328                 return self::isFollower($cid, $uid);
 329         }
 330
 331         /**
 332          * Tests if the given user follow the given contact
 333          *
 334          * @param int $cid Either public contact id or user's contact id
 335          * @param int $uid User ID
 336          *
 337          * @return boolean is the contact url being followed?
 338          * @throws HTTPException\InternalServerErrorException
 339          * @throws \ImagickException
 340          */
 341         public static function isSharing($cid, $uid)
 342         {
 343                 if (self::isBlockedByUser($cid, $uid)) {
 344                         return false;
 345                 }
 346
 347                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 348                 if (empty($cdata['user'])) {
 349                         return false;
 350                 }
 351
 352                 $condition = ['id' => $cdata['user'], 'rel' => [self::SHARING, self::FRIEND]];
 353                 return DBA::exists('contact', $condition);
 354         }
 355
 356         /**
 357          * Tests if the given user follow the given contact url
 358          *
 359          * @param string $url Contact URL
 360          * @param int    $uid User ID
 361          *
 362          * @return boolean is the contact url being followed?
 363          * @throws HTTPException\InternalServerErrorException
 364          * @throws \ImagickException
 365          */
 366         public static function isSharingByURL($url, $uid)
 367         {
 368                 $cid = self::getIdForURL($url, $uid, false);
 369
 370                 if (empty($cid)) {
 371                         return false;
 372                 }
 373
 374                 return self::isSharing($cid, $uid);
 375         }
 376
 377         /**
 378          * Get the basepath for a given contact link
 379          *
 380          * @param string $url The contact link
 381          * @param boolean $dont_update Don't update the contact
 382          *
 383          * @return string basepath
 384          * @throws HTTPException\InternalServerErrorException
 385          * @throws \ImagickException
 386          */
 387         public static function getBasepath($url, $dont_update = false)
 388         {
 389                 $contact = DBA::selectFirst('contact', ['id', 'baseurl'], ['uid' => 0, 'nurl' => Strings::normaliseLink($url)]);
 390                 if (!DBA::isResult($contact)) {
 391                         return '';
 392                 }
 393
 394                 if (!empty($contact['baseurl'])) {
 395                         return $contact['baseurl'];
 396                 } elseif ($dont_update) {
 397                         return '';
 398                 }
 399
 400                 // Update the existing contact
 401                 self::updateFromProbe($contact['id'], '', true);
 402
 403                 // And fetch the result
 404                 $contact = DBA::selectFirst('contact', ['baseurl'], ['id' => $contact['id']]);
 405                 if (empty($contact['baseurl'])) {
 406                         Logger::info('No baseurl for contact', ['url' => $url]);
 407                         return '';
 408                 }
 409
 410                 Logger::info('Found baseurl for contact', ['url' => $url, 'baseurl' => $contact['baseurl']]);
 411                 return $contact['baseurl'];
 412         }
 413
 414         /**
 415          * Check if the given contact url is on the same server
 416          *
 417          * @param string $url The contact link
 418          *
 419          * @return boolean Is it the same server?
 420          */
 421         public static function isLocal($url)
 422         {
 423                 return Strings::compareLink(self::getBasepath($url, true), DI::baseUrl());
 424         }
 425
 426         /**
 427          * Check if the given contact ID is on the same server
 428          *
 429          * @param string $url The contact link
 430          *
 431          * @return boolean Is it the same server?
 432          */
 433         public static function isLocalById(int $cid)
 434         {
 435                 $contact = DBA::selectFirst('contact', ['url', 'baseurl'], ['id' => $cid]);
 436                 if (!DBA::isResult($contact)) {
 437                         return false;
 438                 }
 439
 440                 if (empty($contact['baseurl'])) {
 441                         $baseurl = self::getBasepath($contact['url'], true);
 442                 } else {
 443                         $baseurl = $contact['baseurl'];
 444                 }
 445
 446                 return Strings::compareLink($baseurl, DI::baseUrl());
 447         }
 448
 449         /**
 450          * Returns the public contact id of the given user id
 451          *
 452          * @param  integer $uid User ID
 453          *
 454          * @return integer|boolean Public contact id for given user id
 455          * @throws \Exception
 456          */
 457         public static function getPublicIdByUserId($uid)
 458         {
 459                 $self = DBA::selectFirst('contact', ['url'], ['self' => true, 'uid' => $uid]);
 460                 if (!DBA::isResult($self)) {
 461                         return false;
 462                 }
 463                 return self::getIdForURL($self['url'], 0, false);
 464         }
 465
 466         /**
 467          * Returns the contact id for the user and the public contact id for a given contact id
 468          *
 469          * @param int $cid Either public contact id or user's contact id
 470          * @param int $uid User ID
 471          *
 472          * @return array with public and user's contact id
 473          * @throws HTTPException\InternalServerErrorException
 474          * @throws \ImagickException
 475          */
 476         public static function getPublicAndUserContacID($cid, $uid)
 477         {
 478                 if (empty($uid) || empty($cid)) {
 479                         return [];
 480                 }
 481
 482                 $contact = DBA::selectFirst('contact', ['id', 'uid', 'url'], ['id' => $cid]);
 483                 if (!DBA::isResult($contact)) {
 484                         return [];
 485                 }
 486
 487                 // We quit when the user id don't match the user id of the provided contact
 488                 if (($contact['uid'] != $uid) && ($contact['uid'] != 0)) {
 489                         return [];
 490                 }
 491
 492                 if ($contact['uid'] != 0) {
 493                         $pcid = Contact::getIdForURL($contact['url'], 0, false, ['url' => $contact['url']]);
 494                         if (empty($pcid)) {
 495                                 return [];
 496                         }
 497                         $ucid = $contact['id'];
 498                 } else {
 499                         $pcid = $contact['id'];
 500                         $ucid = Contact::getIdForURL($contact['url'], $uid, false);
 501                 }
 502
 503                 return ['public' => $pcid, 'user' => $ucid];
 504         }
 505
 506         /**
 507          * Returns contact details for a given contact id in combination with a user id
 508          *
 509          * @param int $cid A contact ID
 510          * @param int $uid The User ID
 511          * @param array $fields The selected fields for the contact
 512          *
 513          * @return array The contact details
 514          *
 515          * @throws \Exception
 516          */
 517         public static function getContactForUser($cid, $uid, array $fields = [])
 518         {
 519                 $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
 520
 521                 if (!DBA::isResult($contact)) {
 522                         return [];
 523                 } else {
 524                         return $contact;
 525                 }
 526         }
 527
 528         /**
 529          * Block contact id for user id
 530          *
 531          * @param int     $cid     Either public contact id or user's contact id
 532          * @param int     $uid     User ID
 533          * @param boolean $blocked Is the contact blocked or unblocked?
 534          * @throws \Exception
 535          */
 536         public static function setBlockedForUser($cid, $uid, $blocked)
 537         {
 538                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 539                 if (empty($cdata)) {
 540                         return;
 541                 }
 542
 543                 if ($cdata['user'] != 0) {
 544                         DBA::update('contact', ['blocked' => $blocked], ['id' => $cdata['user'], 'pending' => false]);
 545                 }
 546
 547                 DBA::update('user-contact', ['blocked' => $blocked], ['cid' => $cdata['public'], 'uid' => $uid], true);
 548         }
 549
 550         /**
 551          * Returns "block" state for contact id and user id
 552          *
 553          * @param int $cid Either public contact id or user's contact id
 554          * @param int $uid User ID
 555          *
 556          * @return boolean is the contact id blocked for the given user?
 557          * @throws \Exception
 558          */
 559         public static function isBlockedByUser($cid, $uid)
 560         {
 561                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 562                 if (empty($cdata)) {
 563                         return;
 564                 }
 565
 566                 $public_blocked = false;
 567
 568                 if (!empty($cdata['public'])) {
 569                         $public_contact = DBA::selectFirst('user-contact', ['blocked'], ['cid' => $cdata['public'], 'uid' => $uid]);
 570                         if (DBA::isResult($public_contact)) {
 571                                 $public_blocked = $public_contact['blocked'];
 572                         }
 573                 }
 574
 575                 $user_blocked = $public_blocked;
 576
 577                 if (!empty($cdata['user'])) {
 578                         $user_contact = DBA::selectFirst('contact', ['blocked'], ['id' => $cdata['user'], 'pending' => false]);
 579                         if (DBA::isResult($user_contact)) {
 580                                 $user_blocked = $user_contact['blocked'];
 581                         }
 582                 }
 583
 584                 if ($user_blocked != $public_blocked) {
 585                         DBA::update('user-contact', ['blocked' => $user_blocked], ['cid' => $cdata['public'], 'uid' => $uid], true);
 586                 }
 587
 588                 return $user_blocked;
 589         }
 590
 591         /**
 592          * Ignore contact id for user id
 593          *
 594          * @param int     $cid     Either public contact id or user's contact id
 595          * @param int     $uid     User ID
 596          * @param boolean $ignored Is the contact ignored or unignored?
 597          * @throws \Exception
 598          */
 599         public static function setIgnoredForUser($cid, $uid, $ignored)
 600         {
 601                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 602                 if (empty($cdata)) {
 603                         return;
 604                 }
 605
 606                 if ($cdata['user'] != 0) {
 607                         DBA::update('contact', ['readonly' => $ignored], ['id' => $cdata['user'], 'pending' => false]);
 608                 }
 609
 610                 DBA::update('user-contact', ['ignored' => $ignored], ['cid' => $cdata['public'], 'uid' => $uid], true);
 611         }
 612
 613         /**
 614          * Returns "ignore" state for contact id and user id
 615          *
 616          * @param int $cid Either public contact id or user's contact id
 617          * @param int $uid User ID
 618          *
 619          * @return boolean is the contact id ignored for the given user?
 620          * @throws \Exception
 621          */
 622         public static function isIgnoredByUser($cid, $uid)
 623         {
 624                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 625                 if (empty($cdata)) {
 626                         return;
 627                 }
 628
 629                 $public_ignored = false;
 630
 631                 if (!empty($cdata['public'])) {
 632                         $public_contact = DBA::selectFirst('user-contact', ['ignored'], ['cid' => $cdata['public'], 'uid' => $uid]);
 633                         if (DBA::isResult($public_contact)) {
 634                                 $public_ignored = $public_contact['ignored'];
 635                         }
 636                 }
 637
 638                 $user_ignored = $public_ignored;
 639
 640                 if (!empty($cdata['user'])) {
 641                         $user_contact = DBA::selectFirst('contact', ['readonly'], ['id' => $cdata['user'], 'pending' => false]);
 642                         if (DBA::isResult($user_contact)) {
 643                                 $user_ignored = $user_contact['readonly'];
 644                         }
 645                 }
 646
 647                 if ($user_ignored != $public_ignored) {
 648                         DBA::update('user-contact', ['ignored' => $user_ignored], ['cid' => $cdata['public'], 'uid' => $uid], true);
 649                 }
 650
 651                 return $user_ignored;
 652         }
 653
 654         /**
 655          * Set "collapsed" for contact id and user id
 656          *
 657          * @param int     $cid       Either public contact id or user's contact id
 658          * @param int     $uid       User ID
 659          * @param boolean $collapsed are the contact's posts collapsed or uncollapsed?
 660          * @throws \Exception
 661          */
 662         public static function setCollapsedForUser($cid, $uid, $collapsed)
 663         {
 664                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 665                 if (empty($cdata)) {
 666                         return;
 667                 }
 668
 669                 DBA::update('user-contact', ['collapsed' => $collapsed], ['cid' => $cdata['public'], 'uid' => $uid], true);
 670         }
 671
 672         /**
 673          * Returns "collapsed" state for contact id and user id
 674          *
 675          * @param int $cid Either public contact id or user's contact id
 676          * @param int $uid User ID
 677          *
 678          * @return boolean is the contact id blocked for the given user?
 679          * @throws HTTPException\InternalServerErrorException
 680          * @throws \ImagickException
 681          */
 682         public static function isCollapsedByUser($cid, $uid)
 683         {
 684                 $cdata = self::getPublicAndUserContacID($cid, $uid);
 685                 if (empty($cdata)) {
 686                         return;
 687                 }
 688
 689                 $collapsed = false;
 690
 691                 if (!empty($cdata['public'])) {
 692                         $public_contact = DBA::selectFirst('user-contact', ['collapsed'], ['cid' => $cdata['public'], 'uid' => $uid]);
 693                         if (DBA::isResult($public_contact)) {
 694                                 $collapsed = $public_contact['collapsed'];
 695                         }
 696                 }
 697
 698                 return $collapsed;
 699         }
 700
 701         /**
 702          * Returns a list of contacts belonging in a group
 703          *
 704          * @param int $gid
 705          * @return array
 706          * @throws \Exception
 707          */
 708         public static function getByGroupId($gid)
 709         {
 710                 $return = [];
 711
 712                 if (intval($gid)) {
 713                         $stmt = DBA::p('SELECT `group_member`.`contact-id`, `contact`.*
 714                                 FROM `contact`
 715                                 INNER JOIN `group_member`
 716                                         ON `contact`.`id` = `group_member`.`contact-id`
 717                                 WHERE `gid` = ?
 718                                 AND `contact`.`uid` = ?
 719                                 AND NOT `contact`.`self`
 720                                 AND NOT `contact`.`deleted`
 721                                 AND NOT `contact`.`blocked`
 722                                 AND NOT `contact`.`pending`
 723                                 ORDER BY `contact`.`name` ASC',
 724                                 $gid,
 725                                 local_user()
 726                         );
 727
 728                         if (DBA::isResult($stmt)) {
 729                                 $return = DBA::toArray($stmt);
 730                         }
 731                 }
 732
 733                 return $return;
 734         }
 735
 736         /**
 737          * Creates the self-contact for the provided user id
 738          *
 739          * @param int $uid
 740          * @return bool Operation success
 741          * @throws HTTPException\InternalServerErrorException
 742          */
 743         public static function createSelfFromUserId($uid)
 744         {
 745                 // Only create the entry if it doesn't exist yet
 746                 if (DBA::exists('contact', ['uid' => $uid, 'self' => true])) {
 747                         return true;
 748                 }
 749
 750                 $user = DBA::selectFirst('user', ['uid', 'username', 'nickname'], ['uid' => $uid]);
 751                 if (!DBA::isResult($user)) {
 752                         return false;
 753                 }
 754
 755                 $return = DBA::insert('contact', [
 756                         'uid'         => $user['uid'],
 757                         'created'     => DateTimeFormat::utcNow(),
 758                         'self'        => 1,
 759                         'name'        => $user['username'],
 760                         'nick'        => $user['nickname'],
 761                         'photo'       => DI::baseUrl() . '/photo/profile/' . $user['uid'] . '.jpg',
 762                         'thumb'       => DI::baseUrl() . '/photo/avatar/'  . $user['uid'] . '.jpg',
 763                         'micro'       => DI::baseUrl() . '/photo/micro/'   . $user['uid'] . '.jpg',
 764                         'blocked'     => 0,
 765                         'pending'     => 0,
 766                         'url'         => DI::baseUrl() . '/profile/' . $user['nickname'],
 767                         'nurl'        => Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']),
 768                         'addr'        => $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3),
 769                         'request'     => DI::baseUrl() . '/dfrn_request/' . $user['nickname'],
 770                         'notify'      => DI::baseUrl() . '/dfrn_notify/'  . $user['nickname'],
 771                         'poll'        => DI::baseUrl() . '/dfrn_poll/'    . $user['nickname'],
 772                         'confirm'     => DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'],
 773                         'poco'        => DI::baseUrl() . '/poco/'         . $user['nickname'],
 774                         'name-date'   => DateTimeFormat::utcNow(),
 775                         'uri-date'    => DateTimeFormat::utcNow(),
 776                         'avatar-date' => DateTimeFormat::utcNow(),
 777                         'closeness'   => 0
 778                 ]);
 779
 780                 return $return;
 781         }
 782
 783         /**
 784          * Updates the self-contact for the provided user id
 785          *
 786          * @param int     $uid
 787          * @param boolean $update_avatar Force the avatar update
 788          * @throws HTTPException\InternalServerErrorException
 789          */
 790         public static function updateSelfFromUserID($uid, $update_avatar = false)
 791         {
 792                 $fields = ['id', 'name', 'nick', 'location', 'about', 'keywords', 'avatar',
 793                         'xmpp', 'contact-type', 'forum', 'prv', 'avatar-date', 'url', 'nurl', 'unsearchable',
 794                         'photo', 'thumb', 'micro', 'addr', 'request', 'notify', 'poll', 'confirm', 'poco'];
 795                 $self = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 796                 if (!DBA::isResult($self)) {
 797                         return;
 798                 }
 799
 800                 $fields = ['nickname', 'page-flags', 'account-type'];
 801                 $user = DBA::selectFirst('user', $fields, ['uid' => $uid]);
 802                 if (!DBA::isResult($user)) {
 803                         return;
 804                 }
 805
 806                 $fields = ['name', 'photo', 'thumb', 'about', 'address', 'locality', 'region',
 807                         'country-name', 'pub_keywords', 'xmpp', 'net-publish'];
 808                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid]);
 809                 if (!DBA::isResult($profile)) {
 810                         return;
 811                 }
 812
 813                 $file_suffix = 'jpg';
 814
 815                 $fields = ['name' => $profile['name'], 'nick' => $user['nickname'],
 816                         'avatar-date' => $self['avatar-date'], 'location' => Profile::formatLocation($profile),
 817                         'about' => $profile['about'], 'keywords' => $profile['pub_keywords'],
 818                         'contact-type' => $user['account-type'],
 819                         'xmpp' => $profile['xmpp']];
 820
 821                 $avatar = Photo::selectFirst(['resource-id', 'type'], ['uid' => $uid, 'profile' => true]);
 822                 if (DBA::isResult($avatar)) {
 823                         if ($update_avatar) {
 824                                 $fields['avatar-date'] = DateTimeFormat::utcNow();
 825                         }
 826
 827                         // Creating the path to the avatar, beginning with the file suffix
 828                         $types = Images::supportedTypes();
 829                         if (isset($types[$avatar['type']])) {
 830                                 $file_suffix = $types[$avatar['type']];
 831                         }
 832
 833                         // We are adding a timestamp value so that other systems won't use cached content
 834                         $timestamp = strtotime($fields['avatar-date']);
 835
 836                         $prefix = DI::baseUrl() . '/photo/' .$avatar['resource-id'] . '-';
 837                         $suffix = '.' . $file_suffix . '?ts=' . $timestamp;
 838
 839                         $fields['photo'] = $prefix . '4' . $suffix;
 840                         $fields['thumb'] = $prefix . '5' . $suffix;
 841                         $fields['micro'] = $prefix . '6' . $suffix;
 842                 } else {
 843                         // We hadn't found a photo entry, so we use the default avatar
 844                         $fields['photo'] = DI::baseUrl() . '/images/person-300.jpg';
 845                         $fields['thumb'] = DI::baseUrl() . '/images/person-80.jpg';
 846                         $fields['micro'] = DI::baseUrl() . '/images/person-48.jpg';
 847                 }
 848
 849                 $fields['avatar'] = DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix;
 850                 $fields['forum'] = $user['page-flags'] == User::PAGE_FLAGS_COMMUNITY;
 851                 $fields['prv'] = $user['page-flags'] == User::PAGE_FLAGS_PRVGROUP;
 852                 $fields['unsearchable'] = !$profile['net-publish'];
 853
 854                 // it seems as if ported accounts can have wrong values, so we make sure that now everything is fine.
 855                 $fields['url'] = DI::baseUrl() . '/profile/' . $user['nickname'];
 856                 $fields['nurl'] = Strings::normaliseLink($fields['url']);
 857                 $fields['addr'] = $user['nickname'] . '@' . substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3);
 858                 $fields['request'] = DI::baseUrl() . '/dfrn_request/' . $user['nickname'];
 859                 $fields['notify'] = DI::baseUrl() . '/dfrn_notify/' . $user['nickname'];
 860                 $fields['poll'] = DI::baseUrl() . '/dfrn_poll/'. $user['nickname'];
 861                 $fields['confirm'] = DI::baseUrl() . '/dfrn_confirm/' . $user['nickname'];
 862                 $fields['poco'] = DI::baseUrl() . '/poco/' . $user['nickname'];
 863
 864                 $update = false;
 865
 866                 foreach ($fields as $field => $content) {
 867                         if ($self[$field] != $content) {
 868                                 $update = true;
 869                         }
 870                 }
 871
 872                 if ($update) {
 873                         if ($fields['name'] != $self['name']) {
 874                                 $fields['name-date'] = DateTimeFormat::utcNow();
 875                         }
 876                         $fields['updated'] = DateTimeFormat::utcNow();
 877                         DBA::update('contact', $fields, ['id' => $self['id']]);
 878
 879                         // Update the public contact as well
 880                         DBA::update('contact', $fields, ['uid' => 0, 'nurl' => $self['nurl']]);
 881
 882                         // Update the profile
 883                         $fields = ['photo' => DI::baseUrl() . '/photo/profile/' .$uid . '.' . $file_suffix,
 884                                 'thumb' => DI::baseUrl() . '/photo/avatar/' . $uid .'.' . $file_suffix];
 885                         DBA::update('profile', $fields, ['uid' => $uid]);
 886                 }
 887         }
 888
 889         /**
 890          * Marks a contact for removal
 891          *
 892          * @param int $id contact id
 893          * @return null
 894          * @throws HTTPException\InternalServerErrorException
 895          */
 896         public static function remove($id)
 897         {
 898                 // We want just to make sure that we don't delete our "self" contact
 899                 $contact = DBA::selectFirst('contact', ['uid'], ['id' => $id, 'self' => false]);
 900                 if (!DBA::isResult($contact) || !intval($contact['uid'])) {
 901                         return;
 902                 }
 903
 904                 // Archive the contact
 905                 DBA::update('contact', ['archive' => true, 'network' => Protocol::PHANTOM, 'deleted' => true], ['id' => $id]);
 906
 907                 // Delete it in the background
 908                 Worker::add(PRIORITY_MEDIUM, 'RemoveContact', $id);
 909         }
 910
 911         /**
 912          * Sends an unfriend message. Does not remove the contact
 913          *
 914          * @param array   $user     User unfriending
 915          * @param array   $contact  Contact unfriended
 916          * @param boolean $dissolve Remove the contact on the remote side
 917          * @return void
 918          * @throws HTTPException\InternalServerErrorException
 919          * @throws \ImagickException
 920          */
 921         public static function terminateFriendship(array $user, array $contact, $dissolve = false)
 922         {
 923                 if (empty($contact['network'])) {
 924                         return;
 925                 }
 926
 927                 $protocol = $contact['network'];
 928                 if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
 929                         $protocol = Protocol::ACTIVITYPUB;
 930                 }
 931
 932                 if (($protocol == Protocol::DFRN) && $dissolve) {
 933                         DFRN::deliver($user, $contact, 'placeholder', true);
 934                 } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
 935                         // create an unfollow slap
 936                         $item = [];
 937                         $item['verb'] = Activity::O_UNFOLLOW;
 938                         $item['gravity'] = GRAVITY_ACTIVITY;
 939                         $item['follow'] = $contact["url"];
 940                         $item['body'] = '';
 941                         $item['title'] = '';
 942                         $item['guid'] = '';
 943                         $item['uri-id'] = 0;
 944                         $item['attach'] = '';
 945                         $slap = OStatus::salmon($item, $user);
 946
 947                         if (!empty($contact['notify'])) {
 948                                 Salmon::slapper($user, $contact['notify'], $slap);
 949                         }
 950                 } elseif ($protocol == Protocol::DIASPORA) {
 951                         Diaspora::sendUnshare($user, $contact);
 952                 } elseif ($protocol == Protocol::ACTIVITYPUB) {
 953                         ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 954
 955                         if ($dissolve) {
 956                                 ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $user['uid']);
 957                         }
 958                 }
 959         }
 960
 961         /**
 962          * Marks a contact for archival after a communication issue delay
 963          *
 964          * Contact has refused to recognise us as a friend. We will start a countdown.
 965          * If they still don't recognise us in 32 days, the relationship is over,
 966          * and we won't waste any more time trying to communicate with them.
 967          * This provides for the possibility that their database is temporarily messed
 968          * up or some other transient event and that there's a possibility we could recover from it.
 969          *
 970          * @param array $contact contact to mark for archival
 971          * @return null
 972          * @throws HTTPException\InternalServerErrorException
 973          */
 974         public static function markForArchival(array $contact)
 975         {
 976                 if (!isset($contact['url']) && !empty($contact['id'])) {
 977                         $fields = ['id', 'url', 'archive', 'self', 'term-date'];
 978                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
 979                         if (!DBA::isResult($contact)) {
 980                                 return;
 981                         }
 982                 } elseif (!isset($contact['url'])) {
 983                         Logger::info('Empty contact', ['contact' => $contact, 'callstack' => System::callstack(20)]);
 984                 }
 985
 986                 Logger::info('Contact is marked for archival', ['id' => $contact['id']]);
 987
 988                 // Contact already archived or "self" contact? => nothing to do
 989                 if ($contact['archive'] || $contact['self']) {
 990                         return;
 991                 }
 992
 993                 if ($contact['term-date'] <= DBA::NULL_DATETIME) {
 994                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
 995                         DBA::update('contact', ['term-date' => DateTimeFormat::utcNow()], ['`nurl` = ? AND `term-date` <= ? AND NOT `self`', Strings::normaliseLink($contact['url']), DBA::NULL_DATETIME]);
 996                 } else {
 997                         /* @todo
 998                          * We really should send a notification to the owner after 2-3 weeks
 999                          * so they won't be surprised when the contact vanishes and can take
1000                          * remedial action if this was a serious mistake or glitch
1001                          */
1002
1003                         /// @todo Check for contact vitality via probing
1004                         $archival_days = DI::config()->get('system', 'archival_days', 32);
1005
1006                         $expiry = $contact['term-date'] . ' + ' . $archival_days . ' days ';
1007                         if (DateTimeFormat::utcNow() > DateTimeFormat::utc($expiry)) {
1008                                 /* Relationship is really truly dead. archive them rather than
1009                                  * delete, though if the owner tries to unarchive them we'll start
1010                                  * the whole process over again.
1011                                  */
1012                                 DBA::update('contact', ['archive' => true], ['id' => $contact['id']]);
1013                                 DBA::update('contact', ['archive' => true], ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1014                                 GContact::updateFromPublicContactURL($contact['url']);
1015                         }
1016                 }
1017         }
1018
1019         /**
1020          * Cancels the archival countdown
1021          *
1022          * @see   Contact::markForArchival()
1023          *
1024          * @param array $contact contact to be unmarked for archival
1025          * @return null
1026          * @throws \Exception
1027          */
1028         public static function unmarkForArchival(array $contact)
1029         {
1030                 // Always unarchive the relay contact entry
1031                 if (!empty($contact['batch']) && !empty($contact['term-date']) && ($contact['term-date'] > DBA::NULL_DATETIME)) {
1032                         $fields = ['term-date' => DBA::NULL_DATETIME, 'archive' => false];
1033                         $condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1034                         DBA::update('contact', $fields, $condition);
1035                 }
1036
1037                 $condition = ['`id` = ? AND (`term-date` > ? OR `archive`)', $contact['id'], DBA::NULL_DATETIME];
1038                 $exists = DBA::exists('contact', $condition);
1039
1040                 // We don't need to update, we never marked this contact for archival
1041                 if (!$exists) {
1042                         return;
1043                 }
1044
1045                 Logger::info('Contact is marked as vital again', ['id' => $contact['id']]);
1046
1047                 if (!isset($contact['url']) && !empty($contact['id'])) {
1048                         $fields = ['id', 'url', 'batch'];
1049                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact['id']]);
1050                         if (!DBA::isResult($contact)) {
1051                                 return;
1052                         }
1053                 }
1054
1055                 // It's a miracle. Our dead contact has inexplicably come back to life.
1056                 $fields = ['term-date' => DBA::NULL_DATETIME, 'archive' => false];
1057                 DBA::update('contact', $fields, ['id' => $contact['id']]);
1058                 DBA::update('contact', $fields, ['nurl' => Strings::normaliseLink($contact['url']), 'self' => false]);
1059                 GContact::updateFromPublicContactURL($contact['url']);
1060         }
1061
1062         /**
1063          * Returns the data array for the photo menu of a given contact
1064          *
1065          * @param array $contact contact
1066          * @param int   $uid     optional, default 0
1067          * @return array
1068          * @throws HTTPException\InternalServerErrorException
1069          * @throws \ImagickException
1070          */
1071         public static function photoMenu(array $contact, $uid = 0)
1072         {
1073                 $pm_url = '';
1074                 $status_link = '';
1075                 $photos_link = '';
1076                 $contact_drop_link = '';
1077                 $poke_link = '';
1078
1079                 if ($uid == 0) {
1080                         $uid = local_user();
1081                 }
1082
1083                 if (empty($contact['uid']) || ($contact['uid'] != $uid)) {
1084                         if ($uid == 0) {
1085                                 $profile_link = self::magicLink($contact['url']);
1086                                 $menu = ['profile' => [DI::l10n()->t('View Profile'), $profile_link, true]];
1087
1088                                 return $menu;
1089                         }
1090
1091                         // Look for our own contact if the uid doesn't match and isn't public
1092                         $contact_own = DBA::selectFirst('contact', [], ['nurl' => $contact['nurl'], 'network' => $contact['network'], 'uid' => $uid]);
1093                         if (DBA::isResult($contact_own)) {
1094                                 return self::photoMenu($contact_own, $uid);
1095                         }
1096                 }
1097
1098                 $sparkle = false;
1099                 if (($contact['network'] === Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1100                         $sparkle = true;
1101                         $profile_link = DI::baseUrl() . '/redir/' . $contact['id'];
1102                 } else {
1103                         $profile_link = $contact['url'];
1104                 }
1105
1106                 if ($profile_link === 'mailbox') {
1107                         $profile_link = '';
1108                 }
1109
1110                 if ($sparkle) {
1111                         $status_link = $profile_link . '/status';
1112                         $photos_link = str_replace('/profile/', '/photos/', $profile_link);
1113                         $profile_link = $profile_link . '/profile';
1114                 }
1115
1116                 if (self::canReceivePrivateMessages($contact) && empty($contact['pending'])) {
1117                         $pm_url = DI::baseUrl() . '/message/new/' . $contact['id'];
1118                 }
1119
1120                 if (($contact['network'] == Protocol::DFRN) && !$contact['self'] && empty($contact['pending'])) {
1121                         $poke_link = 'contact/' . $contact['id'] . '/poke';
1122                 }
1123
1124                 $contact_url = DI::baseUrl() . '/contact/' . $contact['id'];
1125
1126                 $posts_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/conversations';
1127
1128                 if (!$contact['self']) {
1129                         $contact_drop_link = DI::baseUrl() . '/contact/' . $contact['id'] . '/drop?confirm=1';
1130                 }
1131
1132                 $follow_link = '';
1133                 $unfollow_link = '';
1134                 if (!$contact['self'] && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
1135                         if ($contact['uid'] && in_array($contact['rel'], [self::SHARING, self::FRIEND])) {
1136                                 $unfollow_link = 'unfollow?url=' . urlencode($contact['url']);
1137                         } elseif(!$contact['pending']) {
1138                                 $follow_link = 'follow?url=' . urlencode($contact['url']);
1139                         }
1140                 }
1141
1142                 if (!empty($follow_link) || !empty($unfollow_link)) {
1143                         $contact_drop_link = '';
1144                 }
1145
1146                 /**
1147                  * Menu array:
1148                  * "name" => [ "Label", "link", (bool)Should the link opened in a new tab? ]
1149                  */
1150                 if (empty($contact['uid'])) {
1151                         $menu = [
1152                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link , true],
1153                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link   , false],
1154                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url  , false],
1155                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link  , true],
1156                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link, true],
1157                         ];
1158                 } else {
1159                         $menu = [
1160                                 'status'  => [DI::l10n()->t('View Status')   , $status_link      , true],
1161                                 'profile' => [DI::l10n()->t('View Profile')  , $profile_link     , true],
1162                                 'photos'  => [DI::l10n()->t('View Photos')   , $photos_link      , true],
1163                                 'network' => [DI::l10n()->t('Network Posts') , $posts_link       , false],
1164                                 'edit'    => [DI::l10n()->t('View Contact')  , $contact_url      , false],
1165                                 'drop'    => [DI::l10n()->t('Drop Contact')  , $contact_drop_link, false],
1166                                 'pm'      => [DI::l10n()->t('Send PM')       , $pm_url           , false],
1167                                 'poke'    => [DI::l10n()->t('Poke')          , $poke_link        , false],
1168                                 'follow'  => [DI::l10n()->t('Connect/Follow'), $follow_link      , true],
1169                                 'unfollow'=> [DI::l10n()->t('UnFollow')      , $unfollow_link    , true],
1170                         ];
1171
1172                         if (!empty($contact['pending'])) {
1173                                 $intro = DBA::selectFirst('intro', ['id'], ['contact-id' => $contact['id']]);
1174                                 if (DBA::isResult($intro)) {
1175                                         $menu['follow'] = [DI::l10n()->t('Approve'), 'notifications/intros/' . $intro['id'], true];
1176                                 }
1177                         }
1178                 }
1179
1180                 $args = ['contact' => $contact, 'menu' => &$menu];
1181
1182                 Hook::callAll('contact_photo_menu', $args);
1183
1184                 $menucondensed = [];
1185
1186                 foreach ($menu as $menuname => $menuitem) {
1187                         if ($menuitem[1] != '') {
1188                                 $menucondensed[$menuname] = $menuitem;
1189                         }
1190                 }
1191
1192                 return $menucondensed;
1193         }
1194
1195         /**
1196          * Returns ungrouped contact count or list for user
1197          *
1198          * Returns either the total number of ungrouped contacts for the given user
1199          * id or a paginated list of ungrouped contacts.
1200          *
1201          * @param int $uid uid
1202          * @return array
1203          * @throws \Exception
1204          */
1205         public static function getUngroupedList($uid)
1206         {
1207                 return q("SELECT *
1208                            FROM `contact`
1209                            WHERE `uid` = %d
1210                            AND NOT `self`
1211                            AND NOT `deleted`
1212                            AND NOT `blocked`
1213                            AND NOT `pending`
1214                            AND `id` NOT IN (
1215                                 SELECT DISTINCT(`contact-id`)
1216                                 FROM `group_member`
1217                                 INNER JOIN `group` ON `group`.`id` = `group_member`.`gid`
1218                                 WHERE `group`.`uid` = %d
1219                            )", intval($uid), intval($uid));
1220         }
1221
1222         /**
1223          * Have a look at all contact tables for a given profile url.
1224          * This function works as a replacement for probing the contact.
1225          *
1226          * @param string  $url Contact URL
1227          * @param integer $cid Contact ID
1228          *
1229          * @return array Contact array in the "probe" structure
1230         */
1231         private static function getProbeDataFromDatabase($url, $cid = null)
1232         {
1233                 // The link could be provided as http although we stored it as https
1234                 $ssl_url = str_replace('http://', 'https://', $url);
1235
1236                 $fields = ['id', 'uid', 'url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
1237                         'photo', 'keywords', 'location', 'about', 'network',
1238                         'priority', 'batch', 'request', 'confirm', 'poco'];
1239
1240                 if (!empty($cid)) {
1241                         $data = DBA::selectFirst('contact', $fields, ['id' => $cid]);
1242                         if (DBA::isResult($data)) {
1243                                 return $data;
1244                         }
1245                 }
1246
1247                 $data = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url)]);
1248
1249                 if (!DBA::isResult($data)) {
1250                         $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
1251                         $data = DBA::selectFirst('contact', $fields, $condition);
1252                 }
1253
1254                 if (DBA::isResult($data)) {
1255                         // For security reasons we don't fetch key data from our users
1256                         $data["pubkey"] = '';
1257                         return $data;
1258                 }
1259
1260                 $fields = ['url', 'addr', 'alias', 'notify', 'name', 'nick',
1261                         'photo', 'keywords', 'location', 'about', 'network'];
1262                 $data = DBA::selectFirst('gcontact', $fields, ['nurl' => Strings::normaliseLink($url)]);
1263
1264                 if (!DBA::isResult($data)) {
1265                         $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
1266                         $data = DBA::selectFirst('contact', $fields, $condition);
1267                 }
1268
1269                 if (DBA::isResult($data)) {
1270                         $data["pubkey"] = '';
1271                         $data["poll"] = '';
1272                         $data["priority"] = 0;
1273                         $data["batch"] = '';
1274                         $data["request"] = '';
1275                         $data["confirm"] = '';
1276                         $data["poco"] = '';
1277                         return $data;
1278                 }
1279
1280                 $data = ActivityPub::probeProfile($url, false);
1281                 if (!empty($data)) {
1282                         return $data;
1283                 }
1284
1285                 $fields = ['url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
1286                         'photo', 'network', 'priority', 'batch', 'request', 'confirm'];
1287                 $data = DBA::selectFirst('fcontact', $fields, ['url' => $url]);
1288
1289                 if (!DBA::isResult($data)) {
1290                         $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
1291                         $data = DBA::selectFirst('contact', $fields, $condition);
1292                 }
1293
1294                 if (DBA::isResult($data)) {
1295                         $data["pubkey"] = '';
1296                         $data["keywords"] = '';
1297                         $data["location"] = '';
1298                         $data["about"] = '';
1299                         $data["poco"] = '';
1300                         return $data;
1301                 }
1302
1303                 return [];
1304         }
1305
1306         /**
1307          * Fetch the contact id for a given URL and user
1308          *
1309          * First lookup in the contact table to find a record matching either `url`, `nurl`,
1310          * `addr` or `alias`.
1311          *
1312          * If there's no record and we aren't looking for a public contact, we quit.
1313          * If there's one, we check that it isn't time to update the picture else we
1314          * directly return the found contact id.
1315          *
1316          * Second, we probe the provided $url whether it's http://server.tld/profile or
1317          * nick@server.tld. We quit if we can't get any info back.
1318          *
1319          * Third, we create the contact record if it doesn't exist
1320          *
1321          * Fourth, we update the existing record with the new data (avatar, alias, nick)
1322          * if there's any updates
1323          *
1324          * @param string  $url       Contact URL
1325          * @param integer $uid       The user id for the contact (0 = public contact)
1326          * @param boolean $update    true = always update, false = never update, null = update when not found or outdated
1327          * @param array   $default   Default value for creating the contact when every else fails
1328          * @param boolean $in_loop   Internally used variable to prevent an endless loop
1329          *
1330          * @return integer Contact ID
1331          * @throws HTTPException\InternalServerErrorException
1332          * @throws \ImagickException
1333          */
1334         public static function getIdForURL($url, $uid = 0, $update = null, $default = [], $in_loop = false)
1335         {
1336                 Logger::info('Get contact data', ['url' => $url, 'user' => $uid]);
1337
1338                 $contact_id = 0;
1339
1340                 if ($url == '') {
1341                         return 0;
1342                 }
1343
1344                 $contact = self::getByURL($url, false, ['id', 'avatar', 'updated', 'network'], $uid);
1345
1346                 if (!empty($contact)) {
1347                         $contact_id = $contact["id"];
1348
1349                         if (empty($default) && in_array($contact['network'], [Protocol::MAIL, Protocol::PHANTOM]) && ($uid == 0)) {
1350                                 // Update public mail accounts via their user's accounts
1351                                 $fields = ['network', 'addr', 'name', 'nick', 'avatar', 'photo', 'thumb', 'micro'];
1352                                 $mailcontact = DBA::selectFirst('contact', $fields, ["`addr` = ? AND `network` = ? AND `uid` != 0", $url, Protocol::MAIL]);
1353                                 if (!DBA::isResult($mailcontact)) {
1354                                         $mailcontact = DBA::selectFirst('contact', $fields, ["`nurl` = ? AND `network` = ? AND `uid` != 0", $url, Protocol::MAIL]);
1355                                 }
1356
1357                                 if (DBA::isResult($mailcontact)) {
1358                                         DBA::update('contact', $mailcontact, ['id' => $contact_id]);
1359                                 }
1360                         }
1361
1362                         if (empty($update)) {
1363                                 return $contact_id;
1364                         }
1365                 } elseif ($uid != 0) {
1366                         // Non-existing user-specific contact, exiting
1367                         return 0;
1368                 }
1369
1370                 if (!$update && empty($default)) {
1371                         // When we don't want to update, we look if we know this contact in any way
1372                         $data = self::getProbeDataFromDatabase($url, $contact_id);
1373                         $background_update = true;
1374                 } elseif (!$update && !empty($default['network'])) {
1375                         // If there are default values, take these
1376                         $data = $default;
1377                         $background_update = false;
1378                 } else {
1379                         $data = [];
1380                         $background_update = false;
1381                 }
1382
1383                 if ((empty($data) && is_null($update)) || $update) {
1384                         $data = Probe::uri($url, "", $uid);
1385                 }
1386
1387                 // Take the default values when probing failed
1388                 if (!empty($default) && !in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1389                         $data = array_merge($data, $default);
1390                 }
1391
1392                 if (empty($data) || ($data['network'] == Protocol::PHANTOM)) {
1393                         Logger::info('No valid network found', ['url' => $url, 'data' => $data, 'callstack' => System::callstack(20)]);
1394                         return 0;
1395                 }
1396
1397                 if (!empty($data['baseurl'])) {
1398                         $data['baseurl'] = GServer::cleanURL($data['baseurl']);
1399                 }
1400
1401                 if (!empty($data['baseurl']) && empty($data['gsid'])) {
1402                         $data['gsid'] = GServer::getID($data['baseurl']);
1403                 }
1404
1405                 if (!$contact_id && !empty($data['alias']) && ($data['alias'] != $data['url']) && !$in_loop) {
1406                         $contact_id = self::getIdForURL($data["alias"], $uid, false, $default, true);
1407                 }
1408
1409                 if (!$contact_id) {
1410                         $fields = [
1411                                 'uid'       => $uid,
1412                                 'created'   => DateTimeFormat::utcNow(),
1413                                 'url'       => $data['url'],
1414                                 'nurl'      => Strings::normaliseLink($data['url']),
1415                                 'addr'      => $data['addr'] ?? '',
1416                                 'alias'     => $data['alias'] ?? '',
1417                                 'notify'    => $data['notify'] ?? '',
1418                                 'poll'      => $data['poll'] ?? '',
1419                                 'name'      => $data['name'] ?? '',
1420                                 'nick'      => $data['nick'] ?? '',
1421                                 'photo'     => $data['photo'] ?? '',
1422                                 'keywords'  => $data['keywords'] ?? '',
1423                                 'location'  => $data['location'] ?? '',
1424                                 'about'     => $data['about'] ?? '',
1425                                 'network'   => $data['network'],
1426                                 'pubkey'    => $data['pubkey'] ?? '',
1427                                 'rel'       => self::SHARING,
1428                                 'priority'  => $data['priority'] ?? 0,
1429                                 'batch'     => $data['batch'] ?? '',
1430                                 'request'   => $data['request'] ?? '',
1431                                 'confirm'   => $data['confirm'] ?? '',
1432                                 'poco'      => $data['poco'] ?? '',
1433                                 'baseurl'   => $data['baseurl'] ?? '',
1434                                 'gsid'      => $data['gsid'] ?? null,
1435                                 'name-date' => DateTimeFormat::utcNow(),
1436                                 'uri-date'  => DateTimeFormat::utcNow(),
1437                                 'avatar-date' => DateTimeFormat::utcNow(),
1438                                 'writable'  => 1,
1439                                 'blocked'   => 0,
1440                                 'readonly'  => 0,
1441                                 'pending'   => 0];
1442
1443                         $condition = ['nurl' => Strings::normaliseLink($data["url"]), 'uid' => $uid, 'deleted' => false];
1444
1445                         // Before inserting we do check if the entry does exist now.
1446                         $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1447                         if (!DBA::isResult($contact)) {
1448                                 Logger::info('Create new contact', $fields);
1449
1450                                 self::insert($fields);
1451
1452                                 // We intentionally aren't using lastInsertId here. There is a chance for duplicates.
1453                                 $contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
1454                                 if (!DBA::isResult($contact)) {
1455                                         Logger::info('Contact creation failed', $fields);
1456                                         // Shouldn't happen
1457                                         return 0;
1458                                 }
1459                         } else {
1460                                 Logger::info('Contact had been created before', ['id' => $contact["id"], 'url' => $url, 'contact' => $fields]);
1461                         }
1462
1463                         $contact_id = $contact["id"];
1464                 }
1465
1466                 if (!empty($data['photo']) && ($data['network'] != Protocol::FEED)) {
1467                         self::updateAvatar($data['photo'], $uid, $contact_id);
1468                 }
1469
1470                 if (in_array($data["network"], array_merge(Protocol::NATIVE_SUPPORT, [Protocol::PUMPIO]))) {
1471                         if ($background_update) {
1472                                 // Update in the background when we fetched the data solely from the database
1473                                 Worker::add(PRIORITY_MEDIUM, "UpdateContact", $contact_id, ($uid == 0 ? 'force' : ''));
1474                         } else {
1475                                 // Else do a direct update
1476                                 self::updateFromProbe($contact_id, '', false);
1477
1478                                 // Update the gcontact entry
1479                                 if ($uid == 0) {
1480                                         GContact::updateFromPublicContactID($contact_id);
1481                                         if (($data['network'] == Protocol::ACTIVITYPUB) && in_array(DI::config()->get('system', 'gcontact_discovery'), [GContact::DISCOVERY_DIRECT, GContact::DISCOVERY_RECURSIVE])) {
1482                                                 GContact::discoverFollowers($data['url']);
1483                                         }
1484                                 }
1485                         }
1486                 } else {
1487                         $fields = ['url', 'nurl', 'addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'avatar-date', 'baseurl', 'gsid'];
1488                         $contact = DBA::selectFirst('contact', $fields, ['id' => $contact_id]);
1489
1490                         // This condition should always be true
1491                         if (!DBA::isResult($contact)) {
1492                                 return $contact_id;
1493                         }
1494
1495                         $updated = [
1496                                 'url' => $data['url'],
1497                                 'nurl' => Strings::normaliseLink($data['url']),
1498                                 'updated' => DateTimeFormat::utcNow()
1499                         ];
1500
1501                         $fields = ['addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'baseurl', 'gsid'];
1502
1503                         foreach ($fields as $field) {
1504                                 $updated[$field] = ($data[$field] ?? '') ?: $contact[$field];
1505                         }
1506
1507                         if (($updated['addr'] != $contact['addr']) || (!empty($data['alias']) && ($data['alias'] != $contact['alias']))) {
1508                                 $updated['uri-date'] = DateTimeFormat::utcNow();
1509                         }
1510
1511                         if (($data['name'] != $contact['name']) || ($data['nick'] != $contact['nick'])) {
1512                                 $updated['name-date'] = DateTimeFormat::utcNow();
1513                         }
1514
1515                         DBA::update('contact', $updated, ['id' => $contact_id], $contact);
1516                 }
1517
1518                 return $contact_id;
1519         }
1520
1521         /**
1522          * Checks if the contact is archived
1523          *
1524          * @param int $cid contact id
1525          *
1526          * @return boolean Is the contact archived?
1527          * @throws HTTPException\InternalServerErrorException
1528          */
1529         public static function isArchived(int $cid)
1530         {
1531                 if ($cid == 0) {
1532                         return false;
1533                 }
1534
1535                 $contact = DBA::selectFirst('contact', ['archive', 'url', 'batch'], ['id' => $cid]);
1536                 if (!DBA::isResult($contact)) {
1537                         return false;
1538                 }
1539
1540                 if ($contact['archive']) {
1541                         return true;
1542                 }
1543
1544                 // Check status of ActivityPub endpoints
1545                 $apcontact = APContact::getByURL($contact['url'], false);
1546                 if (!empty($apcontact)) {
1547                         if (!empty($apcontact['inbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['inbox']])) {
1548                                 return true;
1549                         }
1550
1551                         if (!empty($apcontact['sharedinbox']) && DBA::exists('inbox-status', ['archive' => true, 'url' => $apcontact['sharedinbox']])) {
1552                                 return true;
1553                         }
1554                 }
1555
1556                 // Check status of Diaspora endpoints
1557                 if (!empty($contact['batch'])) {
1558                         $condition = ['archive' => true, 'uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => self::TYPE_RELAY];
1559                         return DBA::exists('contact', $condition);
1560                 }
1561
1562                 return false;
1563         }
1564
1565         /**
1566          * Checks if the contact is blocked
1567          *
1568          * @param int $cid contact id
1569          *
1570          * @return boolean Is the contact blocked?
1571          * @throws HTTPException\InternalServerErrorException
1572          */
1573         public static function isBlocked($cid)
1574         {
1575                 if ($cid == 0) {
1576                         return false;
1577                 }
1578
1579                 $blocked = DBA::selectFirst('contact', ['blocked', 'url'], ['id' => $cid]);
1580                 if (!DBA::isResult($blocked)) {
1581                         return false;
1582                 }
1583
1584                 if (Network::isUrlBlocked($blocked['url'])) {
1585                         return true;
1586                 }
1587
1588                 return (bool) $blocked['blocked'];
1589         }
1590
1591         /**
1592          * Checks if the contact is hidden
1593          *
1594          * @param int $cid contact id
1595          *
1596          * @return boolean Is the contact hidden?
1597          * @throws \Exception
1598          */
1599         public static function isHidden($cid)
1600         {
1601                 if ($cid == 0) {
1602                         return false;
1603                 }
1604
1605                 $hidden = DBA::selectFirst('contact', ['hidden'], ['id' => $cid]);
1606                 if (!DBA::isResult($hidden)) {
1607                         return false;
1608                 }
1609                 return (bool) $hidden['hidden'];
1610         }
1611
1612         /**
1613          * Returns posts from a given contact url
1614          *
1615          * @param string $contact_url Contact URL
1616          * @param bool   $thread_mode
1617          * @param int    $update
1618          * @return string posts in HTML
1619          * @throws \Exception
1620          */
1621         public static function getPostsFromUrl($contact_url, $thread_mode = false, $update = 0)
1622         {
1623                 return self::getPostsFromId(self::getIdForURL($contact_url), $thread_mode, $update);
1624         }
1625
1626         /**
1627          * Returns posts from a given contact id
1628          *
1629          * @param integer $cid
1630          * @param bool    $thread_mode
1631          * @param integer $update
1632          * @return string posts in HTML
1633          * @throws \Exception
1634          */
1635         public static function getPostsFromId($cid, $thread_mode = false, $update = 0)
1636         {
1637                 $a = DI::app();
1638
1639                 $contact = DBA::selectFirst('contact', ['contact-type', 'network'], ['id' => $cid]);
1640                 if (!DBA::isResult($contact)) {
1641                         return '';
1642                 }
1643
1644                 if (empty($contact["network"]) || in_array($contact["network"], Protocol::FEDERATED)) {
1645                         $sql = "(`item`.`uid` = 0 OR (`item`.`uid` = ? AND NOT `item`.`global`))";
1646                 } else {
1647                         $sql = "`item`.`uid` = ?";
1648                 }
1649
1650                 $contact_field = ((($contact["contact-type"] == self::TYPE_COMMUNITY) || ($contact['network'] == Protocol::MAIL)) ? 'owner-id' : 'author-id');
1651
1652                 if ($thread_mode) {
1653                         $condition = ["`$contact_field` = ? AND `gravity` = ? AND " . $sql,
1654                                 $cid, GRAVITY_PARENT, local_user()];
1655                 } else {
1656                         $condition = ["`$contact_field` = ? AND `gravity` IN (?, ?) AND " . $sql,
1657                                 $cid, GRAVITY_PARENT, GRAVITY_COMMENT, local_user()];
1658                 }
1659
1660                 if (DI::mode()->isMobile()) {
1661                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
1662                                 DI::config()->get('system', 'itemspage_network_mobile'));
1663                 } else {
1664                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
1665                                 DI::config()->get('system', 'itemspage_network'));
1666                 }
1667
1668                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
1669
1670                 $params = ['order' => ['received' => true],
1671                         'limit' => [$pager->getStart(), $pager->getItemsPerPage()]];
1672
1673                 if ($thread_mode) {
1674                         $r = Item::selectThreadForUser(local_user(), ['uri'], $condition, $params);
1675
1676                         $items = Item::inArray($r);
1677
1678                         $o = conversation($a, $items, 'contacts', $update, false, 'commented', local_user());
1679                 } else {
1680                         $r = Item::selectForUser(local_user(), [], $condition, $params);
1681
1682                         $items = Item::inArray($r);
1683
1684                         $o = conversation($a, $items, 'contact-posts', false);
1685                 }
1686
1687                 if (!$update) {
1688                         $o .= $pager->renderMinimal(count($items));
1689                 }
1690
1691                 return $o;
1692         }
1693
1694         /**
1695          * Returns the account type name
1696          *
1697          * The function can be called with either the user or the contact array
1698          *
1699          * @param array $contact contact or user array
1700          * @return string
1701          */
1702         public static function getAccountType(array $contact)
1703         {
1704                 // There are several fields that indicate that the contact or user is a forum
1705                 // "page-flags" is a field in the user table,
1706                 // "forum" and "prv" are used in the contact table. They stand for User::PAGE_FLAGS_COMMUNITY and User::PAGE_FLAGS_PRVGROUP.
1707                 // "community" is used in the gcontact table and is true if the contact is User::PAGE_FLAGS_COMMUNITY or User::PAGE_FLAGS_PRVGROUP.
1708                 if ((isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_COMMUNITY))
1709                         || (isset($contact['page-flags']) && (intval($contact['page-flags']) == User::PAGE_FLAGS_PRVGROUP))
1710                         || (isset($contact['forum']) && intval($contact['forum']))
1711                         || (isset($contact['prv']) && intval($contact['prv']))
1712                         || (isset($contact['community']) && intval($contact['community']))
1713                 ) {
1714                         $type = self::TYPE_COMMUNITY;
1715                 } else {
1716                         $type = self::TYPE_PERSON;
1717                 }
1718
1719                 // The "contact-type" (contact table) and "account-type" (user table) are more general then the chaos from above.
1720                 if (isset($contact["contact-type"])) {
1721                         $type = $contact["contact-type"];
1722                 }
1723
1724                 if (isset($contact["account-type"])) {
1725                         $type = $contact["account-type"];
1726                 }
1727
1728                 switch ($type) {
1729                         case self::TYPE_ORGANISATION:
1730                                 $account_type = DI::l10n()->t("Organisation");
1731                                 break;
1732
1733                         case self::TYPE_NEWS:
1734                                 $account_type = DI::l10n()->t('News');
1735                                 break;
1736
1737                         case self::TYPE_COMMUNITY:
1738                                 $account_type = DI::l10n()->t("Forum");
1739                                 break;
1740
1741                         default:
1742                                 $account_type = "";
1743                                 break;
1744                 }
1745
1746                 return $account_type;
1747         }
1748
1749         /**
1750          * Blocks a contact
1751          *
1752          * @param int $cid
1753          * @return bool
1754          * @throws \Exception
1755          */
1756         public static function block($cid, $reason = null)
1757         {
1758                 $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
1759
1760                 return $return;
1761         }
1762
1763         /**
1764          * Unblocks a contact
1765          *
1766          * @param int $cid
1767          * @return bool
1768          * @throws \Exception
1769          */
1770         public static function unblock($cid)
1771         {
1772                 $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
1773
1774                 return $return;
1775         }
1776
1777         /**
1778          * Updates the avatar links in a contact only if needed
1779          *
1780          * @param string $avatar Link to avatar picture
1781          * @param int    $uid    User id of contact owner
1782          * @param int    $cid    Contact id
1783          * @param bool   $force  force picture update
1784          *
1785          * @return void
1786          * @throws HTTPException\InternalServerErrorException
1787          * @throws HTTPException\NotFoundException
1788          * @throws \ImagickException
1789          */
1790         public static function updateAvatar($avatar, $uid, $cid, $force = false)
1791         {
1792                 $contact = DBA::selectFirst('contact', ['avatar', 'photo', 'thumb', 'micro', 'nurl'], ['id' => $cid, 'self' => false]);
1793                 if (!DBA::isResult($contact)) {
1794                         return;
1795                 }
1796
1797                 $data = [
1798                         $contact['photo'] ?? '',
1799                         $contact['thumb'] ?? '',
1800                         $contact['micro'] ?? '',
1801                 ];
1802
1803                 foreach ($data as $image_uri) {
1804                         $image_rid = Photo::ridFromURI($image_uri);
1805                         if ($image_rid && !Photo::exists(['resource-id' => $image_rid, 'uid' => $uid])) {
1806                                 Logger::info('Regenerating avatar', ['contact uid' => $uid, 'cid' => $cid, 'missing photo' => $image_rid, 'avatar' => $contact['avatar']]);
1807                                 $force = true;
1808                         }
1809                 }
1810
1811                 if (($contact["avatar"] != $avatar) || $force) {
1812                         $photos = Photo::importProfilePhoto($avatar, $uid, $cid, true);
1813
1814                         if ($photos) {
1815                                 $fields = ['avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => DateTimeFormat::utcNow()];
1816                                 DBA::update('contact', $fields, ['id' => $cid]);
1817
1818                                 // Update the public contact (contact id = 0)
1819                                 if ($uid != 0) {
1820                                         $pcontact = DBA::selectFirst('contact', ['id'], ['nurl' => $contact['nurl'], 'uid' => 0]);
1821                                         if (DBA::isResult($pcontact)) {
1822                                                 DBA::update('contact', $fields, ['id' => $pcontact['id']]);
1823                                         }
1824                                 }
1825                         }
1826                 }
1827         }
1828
1829         /**
1830          * Helper function for "updateFromProbe". Updates personal and public contact
1831          *
1832          * @param integer $id      contact id
1833          * @param integer $uid     user id
1834          * @param string  $url     The profile URL of the contact
1835          * @param array   $fields  The fields that are updated
1836          *
1837          * @throws \Exception
1838          */
1839         private static function updateContact($id, $uid, $url, array $fields)
1840         {
1841                 if (!DBA::update('contact', $fields, ['id' => $id])) {
1842                         Logger::info('Couldn\'t update contact.', ['id' => $id, 'fields' => $fields]);
1843                         return;
1844                 }
1845
1846                 // Search for duplicated contacts and get rid of them
1847                 if (self::removeDuplicates(Strings::normaliseLink($url), $uid) || ($uid != 0)) {
1848                         return;
1849                 }
1850
1851                 // Update the corresponding gcontact entry
1852                 GContact::updateFromPublicContactID($id);
1853
1854                 // Archive or unarchive the contact. We only need to do this for the public contact.
1855                 // The archive/unarchive function will update the personal contacts by themselves.
1856                 $contact = DBA::selectFirst('contact', [], ['id' => $id]);
1857                 if (!DBA::isResult($contact)) {
1858                         Logger::info('Couldn\'t select contact for archival.', ['id' => $id]);
1859                         return;
1860                 }
1861
1862                 if (!empty($fields['success_update'])) {
1863                         self::unmarkForArchival($contact);
1864                 } elseif (!empty($fields['failure_update'])) {
1865                         self::markForArchival($contact);
1866                 }
1867
1868                 $condition = ['self' => false, 'nurl' => Strings::normaliseLink($url), 'network' => Protocol::FEDERATED];
1869
1870                 // These contacts are sharing with us, we don't poll them.
1871                 // This means that we don't set the update fields in "OnePoll.php".
1872                 $condition['rel'] = self::SHARING;
1873                 DBA::update('contact', $fields, $condition);
1874
1875                 unset($fields['last-update']);
1876                 unset($fields['success_update']);
1877                 unset($fields['failure_update']);
1878
1879                 if (empty($fields)) {
1880                         return;
1881                 }
1882
1883                 // We are polling these contacts, so we mustn't set the update fields here.
1884                 $condition['rel'] = [self::FOLLOWER, self::FRIEND];
1885                 DBA::update('contact', $fields, $condition);
1886         }
1887
1888         /**
1889          * Remove duplicated contacts
1890          *
1891          * @param string  $nurl  Normalised contact url
1892          * @param integer $uid   User id
1893          * @return boolean
1894          * @throws \Exception
1895          */
1896         public static function removeDuplicates(string $nurl, int $uid)
1897         {
1898                 $condition = ['nurl' => $nurl, 'uid' => $uid, 'deleted' => false, 'network' => Protocol::FEDERATED];
1899                 $count = DBA::count('contact', $condition);
1900                 if ($count <= 1) {
1901                         return false;
1902                 }
1903
1904                 $first_contact = DBA::selectFirst('contact', ['id', 'network'], $condition, ['order' => ['id']]);
1905                 if (!DBA::isResult($first_contact)) {
1906                         // Shouldn't happen - so we handle it
1907                         return false;
1908                 }
1909
1910                 $first = $first_contact['id'];
1911                 Logger::info('Found duplicates', ['count' => $count, 'first' => $first, 'uid' => $uid, 'nurl' => $nurl]);
1912                 if (($uid != 0 && ($first_contact['network'] == Protocol::DFRN))) {
1913                         // Don't handle non public DFRN duplicates by now (legacy DFRN is very special because of the key handling)
1914                         Logger::info('Not handling non public DFRN duplicate', ['uid' => $uid, 'nurl' => $nurl]);
1915                         return false;
1916                 }
1917
1918                 // Find all duplicates
1919                 $condition = ["`nurl` = ? AND `uid` = ? AND `id` != ? AND NOT `self` AND NOT `deleted`", $nurl, $uid, $first];
1920                 $duplicates = DBA::select('contact', ['id', 'network'], $condition);
1921                 while ($duplicate = DBA::fetch($duplicates)) {
1922                         if (!in_array($duplicate['network'], Protocol::FEDERATED)) {
1923                                 continue;
1924                         }
1925
1926                         Worker::add(PRIORITY_HIGH, 'MergeContact', $first, $duplicate['id'], $uid);
1927                 }
1928                 DBA::close($duplicates);
1929                 Logger::info('Duplicates handled', ['uid' => $uid, 'nurl' => $nurl]);
1930                 return true;
1931         }
1932
1933         /**
1934          * @param integer $id      contact id
1935          * @param string  $network Optional network we are probing for
1936          * @param boolean $force   Optional forcing of network probing (otherwise we use the cached data)
1937          * @return boolean
1938          * @throws HTTPException\InternalServerErrorException
1939          * @throws \ImagickException
1940          */
1941         public static function updateFromProbe($id, $network = '', $force = false)
1942         {
1943                 /*
1944                   Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
1945                   This will reliably kill your communication with old Friendica contacts.
1946                  */
1947
1948                 // These fields aren't updated by this routine:
1949                 // 'xmpp', 'sensitive'
1950
1951                 $fields = ['uid', 'avatar', 'name', 'nick', 'location', 'keywords', 'about', 'subscribe',
1952                         'unsearchable', 'url', 'addr', 'batch', 'notify', 'poll', 'request', 'confirm', 'poco',
1953                         'network', 'alias', 'baseurl', 'gsid', 'forum', 'prv', 'contact-type', 'pubkey'];
1954                 $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
1955                 if (!DBA::isResult($contact)) {
1956                         return false;
1957                 }
1958
1959                 $uid = $contact['uid'];
1960                 unset($contact['uid']);
1961
1962                 $pubkey = $contact['pubkey'];
1963                 unset($contact['pubkey']);
1964
1965                 $contact['photo'] = $contact['avatar'];
1966                 unset($contact['avatar']);
1967
1968                 $ret = Probe::uri($contact['url'], $network, $uid, !$force);
1969
1970                 $updated = DateTimeFormat::utcNow();
1971
1972                 // We must not try to update relay contacts via probe. They are no real contacts.
1973                 // We check after the probing to be able to correct falsely detected contact types.
1974                 if (($contact['contact-type'] == self::TYPE_RELAY) &&
1975                         (!Strings::compareLink($ret['url'], $contact['url']) || in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
1976                         self::updateContact($id, $uid, $contact['url'], ['last-update' => $updated, 'success_update' => $updated]);
1977                         Logger::info('Not updating relais', ['id' => $id, 'url' => $contact['url']]);
1978                         return true;
1979                 }
1980
1981                 // If Probe::uri fails the network code will be different ("feed" or "unkn")
1982                 if (in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]) && ($ret['network'] != $contact['network'])) {
1983                         if ($force && ($uid == 0)) {
1984                                 self::updateContact($id, $uid, $ret['url'], ['last-update' => $updated, 'failure_update' => $updated]);
1985                         }
1986                         return false;
1987                 }
1988
1989                 if (isset($ret['hide']) && is_bool($ret['hide'])) {
1990                         $ret['unsearchable'] = $ret['hide'];
1991                 }
1992
1993                 if (isset($ret['account-type']) && is_int($ret['account-type'])) {
1994                         $ret['forum'] = false;
1995                         $ret['prv'] = false;
1996                         $ret['contact-type'] = $ret['account-type'];
1997                         if ($ret['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) {
1998                                 $apcontact = APContact::getByURL($ret['url'], false);
1999                                 if (isset($apcontact['manually-approve'])) {
2000                                         $ret['forum'] = (bool)!$apcontact['manually-approve'];
2001                                         $ret['prv'] = (bool)!$ret['forum'];
2002                                 }
2003                         }
2004                 }
2005
2006                 $new_pubkey = $ret['pubkey'];
2007
2008                 $update = false;
2009
2010                 // make sure to not overwrite existing values with blank entries except some technical fields
2011                 $keep = ['batch', 'notify', 'poll', 'request', 'confirm', 'poco', 'baseurl'];
2012                 foreach ($ret as $key => $val) {
2013                         if (!array_key_exists($key, $contact)) {
2014                                 unset($ret[$key]);
2015                         } elseif (($contact[$key] != '') && ($val === '') && !is_bool($ret[$key]) && !in_array($key, $keep)) {
2016                                 $ret[$key] = $contact[$key];
2017                         } elseif ($ret[$key] != $contact[$key]) {
2018                                 $update = true;
2019                         }
2020                 }
2021
2022                 if (!empty($ret['photo']) && ($ret['network'] != Protocol::FEED)) {
2023                         self::updateAvatar($ret['photo'], $uid, $id, $update || $force);
2024                 }
2025
2026                 if (!$update) {
2027                         if ($force) {
2028                                 self::updateContact($id, $uid, $ret['url'], ['last-update' => $updated, 'success_update' => $updated]);
2029                         }
2030
2031                         // Update the public contact
2032                         if ($uid != 0) {
2033                                 self::updateFromProbeByURL($ret['url']);
2034                         }
2035
2036                         return true;
2037                 }
2038
2039                 $ret['nurl'] = Strings::normaliseLink($ret['url']);
2040                 $ret['updated'] = $updated;
2041
2042                 // Only fill the pubkey if it had been empty before. We have to prevent identity theft.
2043                 if (empty($pubkey) && !empty($new_pubkey)) {
2044                         $ret['pubkey'] = $new_pubkey;
2045                 }
2046
2047                 if (($ret['addr'] != $contact['addr']) || (!empty($ret['alias']) && ($ret['alias'] != $contact['alias']))) {
2048                         $ret['uri-date'] = DateTimeFormat::utcNow();
2049                 }
2050
2051                 if (($ret['name'] != $contact['name']) || ($ret['nick'] != $contact['nick'])) {
2052                         $ret['name-date'] = $updated;
2053                 }
2054
2055                 if ($force && ($uid == 0)) {
2056                         $ret['last-update'] = $updated;
2057                         $ret['success_update'] = $updated;
2058                 }
2059
2060                 unset($ret['photo']);
2061
2062                 self::updateContact($id, $uid, $ret['url'], $ret);
2063
2064                 return true;
2065         }
2066
2067         public static function updateFromProbeByURL($url, $force = false)
2068         {
2069                 $id = self::getIdForURL($url);
2070
2071                 if (empty($id)) {
2072                         return $id;
2073                 }
2074
2075                 self::updateFromProbe($id, '', $force);
2076
2077                 return $id;
2078         }
2079
2080         /**
2081          * Detects if a given contact array belongs to a legacy DFRN connection
2082          *
2083          * @param array $contact
2084          * @return boolean
2085          */
2086         public static function isLegacyDFRNContact($contact)
2087         {
2088                 // Newer Friendica contacts are connected via AP, then these fields aren't set
2089                 return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
2090         }
2091
2092         /**
2093          * Detects the communication protocol for a given contact url.
2094          * This is used to detect Friendica contacts that we can communicate via AP.
2095          *
2096          * @param string $url contact url
2097          * @param string $network Network of that contact
2098          * @return string with protocol
2099          */
2100         public static function getProtocol($url, $network)
2101         {
2102                 if ($network != Protocol::DFRN) {
2103                         return $network;
2104                 }
2105
2106                 $apcontact = APContact::getByURL($url);
2107                 if (!empty($apcontact) && !empty($apcontact['generator'])) {
2108                         return Protocol::ACTIVITYPUB;
2109                 } else {
2110                         return $network;
2111                 }
2112         }
2113
2114         /**
2115          * Takes a $uid and a url/handle and adds a new contact
2116          *
2117          * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
2118          * dfrn_request page.
2119          *
2120          * Otherwise this can be used to bulk add StatusNet contacts, Twitter contacts, etc.
2121          *
2122          * Returns an array
2123          * $return['success'] boolean true if successful
2124          * $return['message'] error text if success is false.
2125          *
2126          * Takes a $uid and a url/handle and adds a new contact
2127          *
2128          * @param array  $user        The user the contact should be created for
2129          * @param string $url         The profile URL of the contact
2130          * @param bool   $interactive
2131          * @param string $network
2132          * @return array
2133          * @throws HTTPException\InternalServerErrorException
2134          * @throws HTTPException\NotFoundException
2135          * @throws \ImagickException
2136          */
2137         public static function createFromProbe(array $user, $url, $interactive = false, $network = '')
2138         {
2139                 $result = ['cid' => -1, 'success' => false, 'message' => ''];
2140
2141                 // remove ajax junk, e.g. Twitter
2142                 $url = str_replace('/#!/', '/', $url);
2143
2144                 if (!Network::isUrlAllowed($url)) {
2145                         $result['message'] = DI::l10n()->t('Disallowed profile URL.');
2146                         return $result;
2147                 }
2148
2149                 if (Network::isUrlBlocked($url)) {
2150                         $result['message'] = DI::l10n()->t('Blocked domain');
2151                         return $result;
2152                 }
2153
2154                 if (!$url) {
2155                         $result['message'] = DI::l10n()->t('Connect URL missing.');
2156                         return $result;
2157                 }
2158
2159                 $arr = ['url' => $url, 'contact' => []];
2160
2161                 Hook::callAll('follow', $arr);
2162
2163                 if (empty($arr)) {
2164                         $result['message'] = DI::l10n()->t('The contact could not be added. Please check the relevant network credentials in your Settings -> Social Networks page.');
2165                         return $result;
2166                 }
2167
2168                 if (!empty($arr['contact']['name'])) {
2169                         $ret = $arr['contact'];
2170                 } else {
2171                         $ret = Probe::uri($url, $network, $user['uid'], false);
2172                 }
2173
2174                 if (($network != '') && ($ret['network'] != $network)) {
2175                         Logger::log('Expected network ' . $network . ' does not match actual network ' . $ret['network']);
2176                         return $result;
2177                 }
2178
2179                 // check if we already have a contact
2180                 // the poll url is more reliable than the profile url, as we may have
2181                 // indirect links or webfinger links
2182
2183                 $condition = ['uid' => $user['uid'], 'poll' => [$ret['poll'], Strings::normaliseLink($ret['poll'])], 'network' => $ret['network'], 'pending' => false];
2184                 $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2185                 if (!DBA::isResult($contact)) {
2186                         $condition = ['uid' => $user['uid'], 'nurl' => Strings::normaliseLink($ret['url']), 'network' => $ret['network'], 'pending' => false];
2187                         $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
2188                 }
2189
2190                 $protocol = self::getProtocol($ret['url'], $ret['network']);
2191
2192                 if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
2193                         if ($interactive) {
2194                                 if (strlen(DI::baseUrl()->getUrlPath())) {
2195                                         $myaddr = bin2hex(DI::baseUrl() . '/profile/' . $user['nickname']);
2196                                 } else {
2197                                         $myaddr = bin2hex($user['nickname'] . '@' . DI::baseUrl()->getHostname());
2198                                 }
2199
2200                                 DI::baseUrl()->redirect($ret['request'] . "&addr=$myaddr");
2201
2202                                 // NOTREACHED
2203                         }
2204                 } elseif (DI::config()->get('system', 'dfrn_only') && ($ret['network'] != Protocol::DFRN)) {
2205                         $result['message'] = DI::l10n()->t('This site is not configured to allow communications with other networks.') . EOL;
2206                         $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2207                         return $result;
2208                 }
2209
2210                 // This extra param just confuses things, remove it
2211                 if ($protocol === Protocol::DIASPORA) {
2212                         $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
2213                 }
2214
2215                 // do we have enough information?
2216                 if (empty($ret['name']) || empty($ret['poll']) || (empty($ret['url']) && empty($ret['addr']))) {
2217                         $result['message'] .= DI::l10n()->t('The profile address specified does not provide adequate information.') . EOL;
2218                         if (empty($ret['poll'])) {
2219                                 $result['message'] .= DI::l10n()->t('No compatible communication protocols or feeds were discovered.') . EOL;
2220                         }
2221                         if (empty($ret['name'])) {
2222                                 $result['message'] .= DI::l10n()->t('An author or name was not found.') . EOL;
2223                         }
2224                         if (empty($ret['url'])) {
2225                                 $result['message'] .= DI::l10n()->t('No browser URL could be matched to this address.') . EOL;
2226                         }
2227                         if (strpos($ret['url'], '@') !== false) {
2228                                 $result['message'] .= DI::l10n()->t('Unable to match @-style Identity Address with a known protocol or email contact.') . EOL;
2229                                 $result['message'] .= DI::l10n()->t('Use mailto: in front of address to force email check.') . EOL;
2230                         }
2231                         return $result;
2232                 }
2233
2234                 if ($protocol === Protocol::OSTATUS && DI::config()->get('system', 'ostatus_disabled')) {
2235                         $result['message'] .= DI::l10n()->t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
2236                         $ret['notify'] = '';
2237                 }
2238
2239                 if (!$ret['notify']) {
2240                         $result['message'] .= DI::l10n()->t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
2241                 }
2242
2243                 $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
2244
2245                 $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
2246
2247                 $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
2248
2249                 $pending = false;
2250                 if ($protocol == Protocol::ACTIVITYPUB) {
2251                         $apcontact = APContact::getByURL($ret['url'], false);
2252                         if (isset($apcontact['manually-approve'])) {
2253                                 $pending = (bool)$apcontact['manually-approve'];
2254                         }
2255                 }
2256
2257                 if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
2258                         $writeable = 1;
2259                 }
2260
2261                 if (DBA::isResult($contact)) {
2262                         // update contact
2263                         $new_relation = (($contact['rel'] == self::FOLLOWER) ? self::FRIEND : self::SHARING);
2264
2265                         $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
2266                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2267                 } else {
2268                         $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
2269
2270                         // create contact record
2271                         self::insert([
2272                                 'uid'     => $user['uid'],
2273                                 'created' => DateTimeFormat::utcNow(),
2274                                 'url'     => $ret['url'],
2275                                 'nurl'    => Strings::normaliseLink($ret['url']),
2276                                 'addr'    => $ret['addr'],
2277                                 'alias'   => $ret['alias'],
2278                                 'batch'   => $ret['batch'],
2279                                 'notify'  => $ret['notify'],
2280                                 'poll'    => $ret['poll'],
2281                                 'poco'    => $ret['poco'],
2282                                 'name'    => $ret['name'],
2283                                 'nick'    => $ret['nick'],
2284                                 'network' => $ret['network'],
2285                                 'baseurl' => $ret['baseurl'],
2286                                 'gsid'    => $ret['gsid'] ?? null,
2287                                 'protocol' => $protocol,
2288                                 'pubkey'  => $ret['pubkey'],
2289                                 'rel'     => $new_relation,
2290                                 'priority'=> $ret['priority'],
2291                                 'writable'=> $writeable,
2292                                 'hidden'  => $hidden,
2293                                 'blocked' => 0,
2294                                 'readonly'=> 0,
2295                                 'pending' => $pending,
2296                                 'subhub'  => $subhub
2297                         ]);
2298                 }
2299
2300                 $contact = DBA::selectFirst('contact', [], ['url' => $ret['url'], 'network' => $ret['network'], 'uid' => $user['uid']]);
2301                 if (!DBA::isResult($contact)) {
2302                         $result['message'] .= DI::l10n()->t('Unable to retrieve contact information.') . EOL;
2303                         return $result;
2304                 }
2305
2306                 $contact_id = $contact['id'];
2307                 $result['cid'] = $contact_id;
2308
2309                 Group::addMember(User::getDefaultGroup($user['uid'], $contact["network"]), $contact_id);
2310
2311                 // Update the avatar
2312                 self::updateAvatar($ret['photo'], $user['uid'], $contact_id);
2313
2314                 // pull feed and consume it, which should subscribe to the hub.
2315
2316                 Worker::add(PRIORITY_HIGH, "OnePoll", $contact_id, "force");
2317
2318                 $owner = User::getOwnerDataById($user['uid']);
2319
2320                 if (DBA::isResult($owner)) {
2321                         if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
2322                                 // create a follow slap
2323                                 $item = [];
2324                                 $item['verb'] = Activity::FOLLOW;
2325                                 $item['gravity'] = GRAVITY_ACTIVITY;
2326                                 $item['follow'] = $contact["url"];
2327                                 $item['body'] = '';
2328                                 $item['title'] = '';
2329                                 $item['guid'] = '';
2330                                 $item['uri-id'] = 0;
2331                                 $item['attach'] = '';
2332
2333                                 $slap = OStatus::salmon($item, $owner);
2334
2335                                 if (!empty($contact['notify'])) {
2336                                         Salmon::slapper($owner, $contact['notify'], $slap);
2337                                 }
2338                         } elseif ($protocol == Protocol::DIASPORA) {
2339                                 $ret = Diaspora::sendShare($owner, $contact);
2340                                 Logger::log('share returns: ' . $ret);
2341                         } elseif ($protocol == Protocol::ACTIVITYPUB) {
2342                                 $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
2343                                 if (empty($activity_id)) {
2344                                         // This really should never happen
2345                                         return false;
2346                                 }
2347
2348                                 $ret = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $user['uid'], $activity_id);
2349                                 Logger::log('Follow returns: ' . $ret);
2350                         }
2351                 }
2352
2353                 $result['success'] = true;
2354                 return $result;
2355         }
2356
2357         /**
2358          * Updated contact's SSL policy
2359          *
2360          * @param array  $contact    Contact array
2361          * @param string $new_policy New policy, valid: self,full
2362          *
2363          * @return array Contact array with updated values
2364          * @throws \Exception
2365          */
2366         public static function updateSslPolicy(array $contact, $new_policy)
2367         {
2368                 $ssl_changed = false;
2369                 if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
2370                         $ssl_changed = true;
2371                         $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
2372                         $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
2373                         $contact['notify']  =   str_replace('https:', 'http:', $contact['notify']);
2374                         $contact['poll']    =   str_replace('https:', 'http:', $contact['poll']);
2375                         $contact['confirm'] =   str_replace('https:', 'http:', $contact['confirm']);
2376                         $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
2377                 }
2378
2379                 if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
2380                         $ssl_changed = true;
2381                         $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
2382                         $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
2383                         $contact['notify']  =   str_replace('http:', 'https:', $contact['notify']);
2384                         $contact['poll']    =   str_replace('http:', 'https:', $contact['poll']);
2385                         $contact['confirm'] =   str_replace('http:', 'https:', $contact['confirm']);
2386                         $contact['poco']    =   str_replace('http:', 'https:', $contact['poco']);
2387                 }
2388
2389                 if ($ssl_changed) {
2390                         $fields = ['url' => $contact['url'], 'request' => $contact['request'],
2391                                         'notify' => $contact['notify'], 'poll' => $contact['poll'],
2392                                         'confirm' => $contact['confirm'], 'poco' => $contact['poco']];
2393                         DBA::update('contact', $fields, ['id' => $contact['id']]);
2394                 }
2395
2396                 return $contact;
2397         }
2398
2399         /**
2400          * @param array  $importer Owner (local user) data
2401          * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
2402          * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
2403          * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
2404          * @param string $note     Introduction additional message
2405          * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
2406          * @throws HTTPException\InternalServerErrorException
2407          * @throws \ImagickException
2408          */
2409         public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
2410         {
2411                 // Should always be set
2412                 if (empty($datarray['author-id'])) {
2413                         return false;
2414                 }
2415
2416                 $fields = ['url', 'name', 'nick', 'avatar', 'photo', 'network', 'blocked'];
2417                 $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
2418                 if (!DBA::isResult($pub_contact)) {
2419                         // Should never happen
2420                         return false;
2421                 }
2422
2423                 // Contact is blocked at node-level
2424                 if (self::isBlocked($datarray['author-id'])) {
2425                         return false;
2426                 }
2427
2428                 $url = ($datarray['author-link'] ?? '') ?: $pub_contact['url'];
2429                 $name = $pub_contact['name'];
2430                 $photo = ($pub_contact['avatar'] ?? '') ?: $pub_contact["photo"];
2431                 $nick = $pub_contact['nick'];
2432                 $network = $pub_contact['network'];
2433
2434                 // Ensure that we don't create a new contact when there already is one
2435                 $cid = self::getIdForURL($url, $importer['uid']);
2436                 if (!empty($cid)) {
2437                         $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
2438                 }
2439
2440                 if (!empty($contact)) {
2441                         if (!empty($contact['pending'])) {
2442                                 Logger::info('Pending contact request already exists.', ['url' => $url, 'uid' => $importer['uid']]);
2443                                 return null;
2444                         }
2445
2446                         // Contact is blocked at user-level
2447                         if (!empty($contact['id']) && !empty($importer['id']) &&
2448                                 self::isBlockedByUser($contact['id'], $importer['id'])) {
2449                                 return false;
2450                         }
2451
2452                         // Make sure that the existing contact isn't archived
2453                         self::unmarkForArchival($contact);
2454
2455                         if (($contact['rel'] == self::SHARING)
2456                                 || ($sharing && $contact['rel'] == self::FOLLOWER)) {
2457                                 DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
2458                                                 ['id' => $contact['id'], 'uid' => $importer['uid']]);
2459                         }
2460
2461                         // Ensure to always have the correct network type, independent from the connection request method
2462                         self::updateFromProbe($contact['id'], '', true);
2463
2464                         return true;
2465                 } else {
2466                         // send email notification to owner?
2467                         if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
2468                                 Logger::log('ignoring duplicated connection request from pending contact ' . $url);
2469                                 return null;
2470                         }
2471
2472                         // create contact record
2473                         DBA::insert('contact', [
2474                                 'uid'      => $importer['uid'],
2475                                 'created'  => DateTimeFormat::utcNow(),
2476                                 'url'      => $url,
2477                                 'nurl'     => Strings::normaliseLink($url),
2478                                 'name'     => $name,
2479                                 'nick'     => $nick,
2480                                 'photo'    => $photo,
2481                                 'network'  => $network,
2482                                 'rel'      => self::FOLLOWER,
2483                                 'blocked'  => 0,
2484                                 'readonly' => 0,
2485                                 'pending'  => 1,
2486                                 'writable' => 1,
2487                         ]);
2488
2489                         $contact_id = DBA::lastInsertId();
2490
2491                         // Ensure to always have the correct network type, independent from the connection request method
2492                         self::updateFromProbe($contact_id, '', true);
2493
2494                         Contact::updateAvatar($photo, $importer["uid"], $contact_id, true);
2495
2496                         $contact_record = DBA::selectFirst('contact', ['id', 'network', 'name', 'url', 'photo'], ['id' => $contact_id]);
2497
2498                         /// @TODO Encapsulate this into a function/method
2499                         $fields = ['uid', 'username', 'email', 'page-flags', 'notify-flags', 'language'];
2500                         $user = DBA::selectFirst('user', $fields, ['uid' => $importer['uid']]);
2501                         if (DBA::isResult($user) && !in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2502                                 // create notification
2503                                 $hash = Strings::getRandomHex();
2504
2505                                 if (is_array($contact_record)) {
2506                                         DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
2507                                                                 'blocked' => false, 'knowyou' => false, 'note' => $note,
2508                                                                 'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
2509                                 }
2510
2511                                 Group::addMember(User::getDefaultGroup($importer['uid'], $contact_record["network"]), $contact_record['id']);
2512
2513                                 if (($user['notify-flags'] & Type::INTRO) &&
2514                                         in_array($user['page-flags'], [User::PAGE_FLAGS_NORMAL])) {
2515
2516                                         notification([
2517                                                 'type'         => Type::INTRO,
2518                                                 'notify_flags' => $user['notify-flags'],
2519                                                 'language'     => $user['language'],
2520                                                 'to_name'      => $user['username'],
2521                                                 'to_email'     => $user['email'],
2522                                                 'uid'          => $user['uid'],
2523                                                 'link'         => DI::baseUrl() . '/notifications/intros',
2524                                                 'source_name'  => ((strlen(stripslashes($contact_record['name']))) ? stripslashes($contact_record['name']) : DI::l10n()->t('[Name Withheld]')),
2525                                                 'source_link'  => $contact_record['url'],
2526                                                 'source_photo' => $contact_record['photo'],
2527                                                 'verb'         => ($sharing ? Activity::FRIEND : Activity::FOLLOW),
2528                                                 'otype'        => 'intro'
2529                                         ]);
2530                                 }
2531                         } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
2532                                 if (($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) && ($network != Protocol::DIASPORA)) {
2533                                         self::createFromProbe($importer, $url, false, $network);
2534                                 }
2535
2536                                 $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
2537                                 $fields = ['pending' => false];
2538                                 if ($user['page-flags'] == User::PAGE_FLAGS_FREELOVE) {
2539                                         $fields['rel'] = Contact::FRIEND;
2540                                 }
2541
2542                                 DBA::update('contact', $fields, $condition);
2543
2544                                 return true;
2545                         }
2546                 }
2547
2548                 return null;
2549         }
2550
2551         public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
2552         {
2553                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::SHARING)) {
2554                         DBA::update('contact', ['rel' => self::SHARING], ['id' => $contact['id']]);
2555                 } else {
2556                         Contact::remove($contact['id']);
2557                 }
2558         }
2559
2560         public static function removeSharer($importer, $contact, array $datarray = [], $item = "")
2561         {
2562                 if (($contact['rel'] == self::FRIEND) || ($contact['rel'] == self::FOLLOWER)) {
2563                         DBA::update('contact', ['rel' => self::FOLLOWER], ['id' => $contact['id']]);
2564                 } else {
2565                         Contact::remove($contact['id']);
2566                 }
2567         }
2568
2569         /**
2570          * Create a birthday event.
2571          *
2572          * Update the year and the birthday.
2573          */
2574         public static function updateBirthdays()
2575         {
2576                 $condition = [
2577                         '`bd` != ""
2578                         AND `bd` > "0001-01-01"
2579                         AND SUBSTRING(`bd`, 1, 4) != `bdyear`
2580                         AND (`contact`.`rel` = ? OR `contact`.`rel` = ?)
2581                         AND NOT `contact`.`pending`
2582                         AND NOT `contact`.`hidden`
2583                         AND NOT `contact`.`blocked`
2584                         AND NOT `contact`.`archive`
2585                         AND NOT `contact`.`deleted`',
2586                         Contact::SHARING,
2587                         Contact::FRIEND
2588                 ];
2589
2590                 $contacts = DBA::select('contact', ['id', 'uid', 'name', 'url', 'bd'], $condition);
2591
2592                 while ($contact = DBA::fetch($contacts)) {
2593                         Logger::log('update_contact_birthday: ' . $contact['bd']);
2594
2595                         $nextbd = DateTimeFormat::utcNow('Y') . substr($contact['bd'], 4);
2596
2597                         if (Event::createBirthday($contact, $nextbd)) {
2598                                 // update bdyear
2599                                 DBA::update(
2600                                         'contact',
2601                                         ['bdyear' => substr($nextbd, 0, 4), 'bd' => $nextbd],
2602                                         ['id' => $contact['id']]
2603                                 );
2604                         }
2605                 }
2606                 DBA::close($contacts);
2607         }
2608
2609         /**
2610          * Remove the unavailable contact ids from the provided list
2611          *
2612          * @param array $contact_ids Contact id list
2613          * @return array
2614          * @throws \Exception
2615          */
2616         public static function pruneUnavailable(array $contact_ids)
2617         {
2618                 if (empty($contact_ids)) {
2619                         return [];
2620                 }
2621
2622                 $contacts = Contact::selectToArray(['id'], [
2623                         'id'      => $contact_ids,
2624                         'blocked' => false,
2625                         'pending' => false,
2626                         'archive' => false,
2627                 ]);
2628
2629                 return array_column($contacts, 'id');
2630         }
2631
2632         /**
2633          * Returns a magic link to authenticate remote visitors
2634          *
2635          * @todo  check if the return is either a fully qualified URL or a relative path to Friendica basedir
2636          *
2637          * @param string $contact_url The address of the target contact profile
2638          * @param string $url         An url that we will be redirected to after the authentication
2639          *
2640          * @return string with "redir" link
2641          * @throws HTTPException\InternalServerErrorException
2642          * @throws \ImagickException
2643          */
2644         public static function magicLink($contact_url, $url = '')
2645         {
2646                 if (!Session::isAuthenticated()) {
2647                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2648                 }
2649
2650                 $data = self::getProbeDataFromDatabase($contact_url);
2651                 if (empty($data)) {
2652                         return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
2653                 }
2654
2655                 // Prevents endless loop in case only a non-public contact exists for the contact URL
2656                 unset($data['uid']);
2657
2658                 return self::magicLinkByContact($data, $url ?: $contact_url);
2659         }
2660
2661         /**
2662          * Returns a magic link to authenticate remote visitors
2663          *
2664          * @param integer $cid The contact id of the target contact profile
2665          * @param string  $url An url that we will be redirected to after the authentication
2666          *
2667          * @return string with "redir" link
2668          * @throws HTTPException\InternalServerErrorException
2669          * @throws \ImagickException
2670          */
2671         public static function magicLinkbyId($cid, $url = '')
2672         {
2673                 $contact = DBA::selectFirst('contact', ['id', 'network', 'url', 'uid'], ['id' => $cid]);
2674
2675                 return self::magicLinkByContact($contact, $url);
2676         }
2677
2678         /**
2679          * Returns a magic link to authenticate remote visitors
2680          *
2681          * @param array  $contact The contact array with "uid", "network" and "url"
2682          * @param string $url     An url that we will be redirected to after the authentication
2683          *
2684          * @return string with "redir" link
2685          * @throws HTTPException\InternalServerErrorException
2686          * @throws \ImagickException
2687          */
2688         public static function magicLinkByContact($contact, $url = '')
2689         {
2690                 $destination = $url ?: $contact['url']; // Equivalent to ($url != '') ? $url : $contact['url'];
2691
2692                 if (!Session::isAuthenticated() || ($contact['network'] != Protocol::DFRN)) {
2693                         return $destination;
2694                 }
2695
2696                 // Only redirections to the same host do make sense
2697                 if (($url != '') && (parse_url($url, PHP_URL_HOST) != parse_url($contact['url'], PHP_URL_HOST))) {
2698                         return $url;
2699                 }
2700
2701                 if (!empty($contact['uid'])) {
2702                         return self::magicLink($contact['url'], $url);
2703                 }
2704
2705                 if (empty($contact['id'])) {
2706                         return $destination;
2707                 }
2708
2709                 $redirect = 'redir/' . $contact['id'];
2710
2711                 if (($url != '') && !Strings::compareLink($contact['url'], $url)) {
2712                         $redirect .= '?url=' . $url;
2713                 }
2714
2715                 return $redirect;
2716         }
2717
2718         /**
2719          * Remove a contact from all groups
2720          *
2721          * @param integer $contact_id
2722          *
2723          * @return boolean Success
2724          */
2725         public static function removeFromGroups($contact_id)
2726         {
2727                 return DBA::delete('group_member', ['contact-id' => $contact_id]);
2728         }
2729
2730         /**
2731          * Is the contact a forum?
2732          *
2733          * @param integer $contactid ID of the contact
2734          *
2735          * @return boolean "true" if it is a forum
2736          */
2737         public static function isForum($contactid)
2738         {
2739                 $fields = ['forum', 'prv'];
2740                 $condition = ['id' => $contactid];
2741                 $contact = DBA::selectFirst('contact', $fields, $condition);
2742                 if (!DBA::isResult($contact)) {
2743                         return false;
2744                 }
2745
2746                 // Is it a forum?
2747                 return ($contact['forum'] || $contact['prv']);
2748         }
2749
2750         /**
2751          * Can the remote contact receive private messages?
2752          *
2753          * @param array $contact
2754          * @return bool
2755          */
2756         public static function canReceivePrivateMessages(array $contact)
2757         {
2758                 $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
2759                 $self = $contact['self'] ?? false;
2760
2761                 return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
2762         }
2763 }