Developer
<?php
namespace Illuminate\Session;
use Illuminate\Contracts\Auth\Guard;
use Illuminate\Contracts\Container\Container;
use Illuminate\Database\ConnectionInterface;
use Illuminate\Database\QueryException;
use Illuminate\Support\Arr;
use Illuminate\Support\Carbon;
use Illuminate\Support\InteractsWithTime;
use SessionHandlerInterface;
class DatabaseSessionHandler implements ExistenceAwareInterface, SessionHandlerInterface
{
use InteractsWithTime;
/**
* The database connection instance.
*
* @var \Illuminate\Database\ConnectionInterface
*/
protected $connection;
/**
* The name of the session table.
*
* @var string
*/
protected $table;
/**
* The number of minutes the session should be valid.
*
* @var int
*/
protected $minutes;
/**
* The container instance.
*
* @var \Illuminate\Contracts\Container\Container|null
*/
protected $container;
/**
* The existence state of the session.
*
* @var bool
*/
protected $exists;
/**
* Create a new database session handler instance.
*
* @param \Illuminate\Database\ConnectionInterface $connection
* @param string $table
* @param int $minutes
* @param \Illuminate\Contracts\Container\Container|null $container
* @return void
*/
public function __construct(ConnectionInterface $connection, $table, $minutes, Container $container = null)
{
$this->table = $table;
$this->minutes = $minutes;
$this->container = $container;
$this->connection = $connection;
}
/**
* {@inheritdoc}
*
* @return bool
*/
public function open($savePath, $sessionName): bool
{
return true;
}
/**
* {@inheritdoc}
*
* @return bool
*/
public function close(): bool
{
return true;
}
/**
* {@inheritdoc}
*
* @return string|false
*/
public function read($sessionId): string|false
{
$session = (object) $this->getQuery()->find($sessionId);
if ($this->expired($session)) {
$this->exists = true;
return '';
}
if (isset($session->payload)) {
$this->exists = true;
return base64_decode($session->payload);
}
return '';
}
/**
* Determine if the session is expired.
*
* @param \stdClass $session
* @return bool
*/
protected function expired($session)
{
return isset($session->last_activity) &&
$session->last_activity < Carbon::now()->subMinutes($this->minutes)->getTimestamp();
}
/**
* {@inheritdoc}
*
* @return bool
*/
public function write($sessionId, $data): bool
{
$payload = $this->getDefaultPayload($data);
if (! $this->exists) {
$this->read($sessionId);
}
if ($this->exists) {
$this->performUpdate($sessionId, $payload);
} else {
$this->performInsert($sessionId, $payload);
}
return $this->exists = true;
}
/**
* Perform an insert operation on the session ID.
*
* @param string $sessionId
* @param array<string, mixed> $payload
* @return bool|null
*/
protected function performInsert($sessionId, $payload)
{
try {
return $this->getQuery()->insert(Arr::set($payload, 'id', $sessionId));
} catch (QueryException $e) {
$this->performUpdate($sessionId, $payload);
}
}
/**
* Perform an update operation on the session ID.
*
* @param string $sessionId
* @param array<string, mixed> $payload
* @return int
*/
protected function performUpdate($sessionId, $payload)
{
return $this->getQuery()->where('id', $sessionId)->update($payload);
}
/**
* Get the default payload for the session.
*
* @param string $data
* @return array
*/
protected function getDefaultPayload($data)
{
$payload = [
'payload' => base64_encode($data),
'last_activity' => $this->currentTime(),
];
if (! $this->container) {
return $payload;
}
return tap($payload, function (&$payload) {
$this->addUserInformation($payload)
->addRequestInformation($payload);
});
}
/**
* Add the user information to the session payload.
*
* @param array $payload
* @return $this
*/
protected function addUserInformation(&$payload)
{
if ($this->container->bound(Guard::class)) {
$payload['user_id'] = $this->userId();
}
return $this;
}
/**
* Get the currently authenticated user's ID.
*
* @return mixed
*/
protected function userId()
{
return $this->container->make(Guard::class)->id();
}
/**
* Add the request information to the session payload.
*
* @param array $payload
* @return $this
*/
protected function addRequestInformation(&$payload)
{
if ($this->container->bound('request')) {
$payload = array_merge($payload, [
'ip_address' => $this->ipAddress(),
'user_agent' => $this->userAgent(),
]);
}
return $this;
}
/**
* Get the IP address for the current request.
*
* @return string|null
*/
protected function ipAddress()
{
return $this->container->make('request')->ip();
}
/**
* Get the user agent for the current request.
*
* @return string
*/
protected function userAgent()
{
return substr((string) $this->container->make('request')->header('User-Agent'), 0, 500);
}
/**
* {@inheritdoc}
*
* @return bool
*/
public function destroy($sessionId): bool
{
$this->getQuery()->where('id', $sessionId)->delete();
return true;
}
/**
* {@inheritdoc}
*
* @return int
*/
public function gc($lifetime): int
{
return $this->getQuery()->where('last_activity', '<=', $this->currentTime() - $lifetime)->delete();
}
/**
* Get a fresh query builder instance for the table.
*
* @return \Illuminate\Database\Query\Builder
*/
protected function getQuery()
{
return $this->connection->table($this->table);
}
/**
* Set the application instance used by the handler.
*
* @param \Illuminate\Contracts\Foundation\Application $container
* @return $this
*/
public function setContainer($container)
{
$this->container = $container;
return $this;
}
/**
* Set the existence state for the session.
*
* @param bool $value
* @return $this
*/
public function setExists($value)
{
$this->exists = $value;
return $this;
}
}
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