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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2023 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees;
use Psr\Http\Message\ServerRequestInterface;
use SessionHandlerInterface;
use function date;
use function time;
/**
* Session handling - stores sessions in the database.
*/
class SessionDatabaseHandler implements SessionHandlerInterface
{
private ServerRequestInterface $request;
private ?object $row = null;
/**
* @param ServerRequestInterface $request
*/
public function __construct(ServerRequestInterface $request)
{
$this->request = $request;
}
/**
* @param string $path
* @param string $name
*
* @return bool
*/
public function open(string $path, string $name): bool
{
return true;
}
/**
* @return bool
*/
public function close(): bool
{
return true;
}
/**
* @param string $id
*
* @return string
*/
public function read(string $id): string
{
$this->row = DB::table('session')
->where('session_id', '=', $id)
->first();
return $this->row->session_data ?? '';
}
/**
* @param string $id
* @param string $data
*
* @return bool
*/
public function write(string $id, string $data): bool
{
$ip_address = Validator::attributes($this->request)->string('client-ip');
$user_id = (int) Auth::id();
$now = Registry::timestampFactory()->now();
if ($this->row === null) {
DB::table('session')->insert([
'session_id' => $id,
'session_time' => $now->toDateTimeString(),
'user_id' => $user_id,
'ip_address' => $ip_address,
'session_data' => $data,
]);
} else {
$updates = [];
// The user ID can change if we masquerade as another user.
if ((int) $this->row->user_id !== $user_id) {
$updates['user_id'] = $user_id;
}
if ($this->row->ip_address !== $ip_address) {
$updates['ip_address'] = $ip_address;
}
if ($this->row->session_data !== $data) {
$updates['session_data'] = $data;
}
// Only update session once a minute to reduce contention on the session table.
if ($now->subtractMinutes(1)->timestamp() > Registry::timestampFactory()->fromString($this->row->session_time)->timestamp()) {
$updates['session_time'] = $now->toDateTimeString();
}
if ($updates !== []) {
DB::table('session')
->where('session_id', '=', $id)
->update($updates);
}
}
return true;
}
/**
* @param string $id
*
* @return bool
*/
public function destroy(string $id): bool
{
DB::table('session')
->where('session_id', '=', $id)
->delete();
return true;
}
/**
* @param int $max_lifetime
*
* @return int
*/
public function gc(int $max_lifetime): int
{
return DB::table('session')
->where('session_time', '<', date('Y-m-d H:i:s', time() - $max_lifetime))
->delete();
}
}
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