1 <?php

     2 

     3 /*

     4  * This file is part of the Symfony framework.

     5  *

     6  * (c) Fabien Potencier <fabien@symfony.com>

     7  *

     8  * This source file is subject to the MIT license that is bundled

     9  * with this source code in the file LICENSE.

    10  */

    11 

    12 namespace Symfony\Component\Security\Http\Session;

    13 

    14 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;

    15 use Symfony\Component\HttpFoundation\Request;

    16 

    17 /**

    18  * The default session strategy implementation.

    19  *

    20  * Supports the following strategies:

    21  * NONE: the session is not changed

    22  * MIGRATE: the session id is updated, attributes are kept

    23  * INVALIDATE: the session id is updated, attributes are lost

    24  *

    25  * @author Johannes M. Schmitt <schmittjoh@gmail.com>

    26  */

    27 class SessionAuthenticationStrategy implements SessionAuthenticationStrategyInterface

    28 {

    29     const NONE         = 'none';

    30     const MIGRATE      = 'migrate';

    31     const INVALIDATE   = 'invalidate';

    32 

    33     private $strategy;

    34 

    35     public function __construct($strategy)

    36     {

    37         $this->strategy = $strategy;

    38     }

    39 

    40     /**

    41      * {@inheritDoc}

    42      */

    43     public function onAuthentication(Request $request, TokenInterface $token)

    44     {

    45         switch ($this->strategy) {

    46             case self::NONE:

    47                 return;

    48 

    49             case self::MIGRATE:

    50                 $request->getSession()->migrate();

    51 

    52                 return;

    53 

    54             case self::INVALIDATE:

    55                 $request->getSession()->invalidate();

    56 

    57                 return;

    58 

    59             default:

    60                 throw new \RuntimeException(sprintf('Invalid session authentication strategy "%s"', $this->strategy));

    61         }

    62     }

    63 }