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<?php
/*
* GNUfault.org - GNUfault's website
* Copyright (C) 2026 Connor Thomson
*
* 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/>.
*/
const SESSION_LIFETIME = 60 * 60 * 24 * 365;
function session_cookie(int $lifetime): array {
return [
'lifetime' => $lifetime,
'path' => '/',
'secure' => true,
'httponly' => true,
'samesite' => 'Strict'
];
}
function has_session(): bool {
if (session_status() === PHP_SESSION_ACTIVE) {
return true;
}
return isset($_COOKIE[session_name()]);
}
function start_session(): void {
if (session_status() === PHP_SESSION_ACTIVE) {
return;
}
ini_set('session.gc_maxlifetime', (string)SESSION_LIFETIME);
session_set_cookie_params(session_cookie(0));
session_start();
if (!empty($_SESSION['remember'])) {
remember_session();
}
}
function remember_session(): void {
$parameters = session_cookie(SESSION_LIFETIME);
$parameters['expires'] = time() + $parameters['lifetime'];
unset($parameters['lifetime']);
setcookie(session_name(), session_id(), $parameters);
}
function sign_in(int $user_id, string $username, bool $remember): void {
start_session();
session_regenerate_id(true);
$_SESSION['user_id'] = $user_id;
$_SESSION['username'] = $username;
$_SESSION['remember'] = $remember;
if ($remember) {
remember_session();
}
}
function set_user_id(int $user_id): void {
start_session();
session_regenerate_id(true);
$_SESSION['user_id'] = $user_id;
}
function sign_out(): void {
if (!has_session()) {
return;
}
start_session();
$_SESSION = [];
$parameters = session_cookie(0);
$parameters['expires'] = time() - 3600;
unset($parameters['lifetime']);
setcookie(session_name(), '', $parameters);
session_destroy();
}
function get_user_id(): ?int {
if (!has_session()) {
return null;
}
start_session();
return isset($_SESSION['user_id']) ? (int)$_SESSION['user_id'] : null;
}
function get_username(): ?string {
if (!has_session()) {
return null;
}
start_session();
return isset($_SESSION['username']) ? (string)$_SESSION['username'] : null;
}
?>
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