friendica/src/Core/Session.php

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<?php
/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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namespace Friendica\Core;
use Friendica\Database\DBA;
use Friendica\DI;
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use Friendica\Model\Contact;
use Friendica\Util\Strings;
/**
* High-level Session service class
*/
class Session
{
/**
* Returns the user id of locally logged in user or false.
*
* @return int|bool user id or false
*/
public static function getLocalUser()
{
$session = DI::session();
if (!empty($session->get('authenticated')) && !empty($session->get('uid'))) {
return intval($session->get('uid'));
}
return false;
}
/**
* Returns the public contact id of logged in user or false.
*
* @return int|bool public contact id or false
*/
public static function getPublicContact()
{
static $public_contact_id = false;
$session = DI::session();
if (!$public_contact_id && !empty($session->get('authenticated'))) {
if (!empty($session->get('my_address'))) {
// Local user
$public_contact_id = intval(Contact::getIdForURL($session->get('my_address'), 0, false));
} elseif (!empty($session->get('visitor_home'))) {
// Remote user
$public_contact_id = intval(Contact::getIdForURL($session->get('visitor_home'), 0, false));
}
} elseif (empty($session->get('authenticated'))) {
$public_contact_id = false;
}
return $public_contact_id;
}
/**
* Returns public contact id of authenticated site visitor or false
*
* @return int|bool visitor_id or false
*/
public static function getRemoteUser()
{
$session = DI::session();
if (empty($session->get('authenticated'))) {
return false;
}
if (!empty($session->get('visitor_id'))) {
return intval($session->get('visitor_id'));
}
return false;
}
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/**
* Return the user contact ID of a visitor for the given user ID they are visiting
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*
* @param integer $uid User ID
* @return integer
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*/
public static function getRemoteContactID($uid)
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{
$session = DI::session();
if (!empty($session->get('remote')[$uid])) {
$remote = $session->get('remote')[$uid];
} else {
$remote = 0;
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}
$local_user = !empty($session->get('authenticated')) ? $session->get('uid') : 0;
if (empty($remote) && ($local_user != $uid) && !empty($my_address = $session->get('my_address'))) {
$remote = Contact::getIdForURL($my_address, $uid, false);
}
return $remote;
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}
/**
* Returns User ID for given contact ID of the visitor
*
* @param integer $cid Contact ID
* @return integer User ID for given contact ID of the visitor
*/
public static function getUserIDForVisitorContactID($cid)
{
$session = DI::session();
if (empty($session->get('remote'))) {
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return false;
}
return array_search($cid, $session->get('remote'));
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}
/**
* Set the session variable that contains the contact IDs for the visitor's contact URL
*
* @param string $url Contact URL
*/
public static function setVisitorsContacts()
{
$session = DI::session();
$session->set('remote', []);
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$remote = [];
$remote_contacts = DBA::select('contact', ['id', 'uid'], ['nurl' => Strings::normaliseLink($session->get('my_url')), 'rel' => [Contact::FOLLOWER, Contact::FRIEND], 'self' => false]);
while ($contact = DBA::fetch($remote_contacts)) {
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if (($contact['uid'] == 0) || Contact\User::isBlocked($contact['id'], $contact['uid'])) {
continue;
}
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$remote[$contact['uid']] = $contact['id'];
}
DBA::close($remote_contacts);
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$session->set('remote', $remote);
}
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/**
* Returns if the current visitor is authenticated
*
* @return boolean "true" when visitor is either a local or remote user
*/
public static function isAuthenticated()
{
$session = DI::session();
return $session->get('authenticated', false);
}
}