class Twig_Extension_Sandbox

class Twig_Extension_Sandbox extends Twig_Extension {
  protected $sandboxedGlobally;
  protected $sandboxed;
  protected $policy;
  public function __construct(Twig_Sandbox_SecurityPolicyInterface $policy, $sandboxed = false) {
    $this->policy = $policy;
    $this->sandboxedGlobally = $sandboxed;
  }

  /**
   * Returns the token parser instances to add to the existing list.
   *
   * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
   */
  public function getTokenParsers() {
    return array(
      new Twig_TokenParser_Sandbox(),
    );
  }

  /**
   * Returns the node visitor instances to add to the existing list.
   *
   * @return array An array of Twig_NodeVisitorInterface instances
   */
  public function getNodeVisitors() {
    return array(
      new Twig_NodeVisitor_Sandbox(),
    );
  }
  public function enableSandbox() {
    $this->sandboxed = true;
  }
  public function disableSandbox() {
    $this->sandboxed = false;
  }
  public function isSandboxed() {
    return $this->sandboxedGlobally || $this->sandboxed;
  }
  public function isSandboxedGlobally() {
    return $this->sandboxedGlobally;
  }
  public function setSecurityPolicy(Twig_Sandbox_SecurityPolicyInterface $policy) {
    $this->policy = $policy;
  }
  public function getSecurityPolicy() {
    return $this->policy;
  }
  public function checkSecurity($tags, $filters, $functions) {
    if ($this
      ->isSandboxed()) {
      $this->policy
        ->checkSecurity($tags, $filters, $functions);
    }
  }
  public function checkMethodAllowed($obj, $method) {
    if ($this
      ->isSandboxed()) {
      $this->policy
        ->checkMethodAllowed($obj, $method);
    }
  }
  public function checkPropertyAllowed($obj, $method) {
    if ($this
      ->isSandboxed()) {
      $this->policy
        ->checkPropertyAllowed($obj, $method);
    }
  }
  public function ensureToStringAllowed($obj) {
    if (is_object($obj)) {
      $this->policy
        ->checkMethodAllowed($obj, '__toString');
    }
    return $obj;
  }

  /**
   * Returns the name of the extension.
   *
   * @return string The extension name
   */
  public function getName() {
    return 'sandbox';
  }

}