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