Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Session;
Chris@0: 
Chris@0: use Drupal\Core\Site\Settings;
Chris@0: use Symfony\Component\HttpFoundation\Session\Storage\MetadataBag as SymfonyMetadataBag;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides a container for application specific session metadata.
Chris@0:  */
Chris@0: class MetadataBag extends SymfonyMetadataBag {
Chris@0: 
Chris@0:   /**
Chris@0:    * The key used to store the CSRF token seed in the session.
Chris@0:    */
Chris@0:   const CSRF_TOKEN_SEED = 's';
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new metadata bag instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Site\Settings $settings
Chris@0:    *   The settings instance.
Chris@0:    */
Chris@0:   public function __construct(Settings $settings) {
Chris@0:     $update_threshold = $settings->get('session_write_interval', 180);
Chris@0:     parent::__construct('_sf2_meta', $update_threshold);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Set the CSRF token seed.
Chris@0:    *
Chris@0:    * @param string $csrf_token_seed
Chris@0:    *   The per-session CSRF token seed.
Chris@0:    */
Chris@0:   public function setCsrfTokenSeed($csrf_token_seed) {
Chris@0:     $this->meta[static::CSRF_TOKEN_SEED] = $csrf_token_seed;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Get the CSRF token seed.
Chris@0:    *
Chris@0:    * @return string|null
Chris@0:    *   The per-session CSRF token seed or null when no value is set.
Chris@0:    */
Chris@0:   public function getCsrfTokenSeed() {
Chris@0:     if (isset($this->meta[static::CSRF_TOKEN_SEED])) {
Chris@0:       return $this->meta[static::CSRF_TOKEN_SEED];
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Clear the CSRF token seed.
Chris@0:    */
Chris@0:   public function clearCsrfTokenSeed() {
Chris@0:     unset($this->meta[static::CSRF_TOKEN_SEED]);
Chris@0:   }
Chris@0: 
Chris@0: }