Sandbox.php in Zircon Profile 8

File

vendor/twig/twig/lib/Twig/NodeVisitor/Sandbox.php

<?php

/*
 * This file is part of Twig.
 *
 * (c) 2009 Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Twig_NodeVisitor_Sandbox implements sandboxing.
 *
 * @author Fabien Potencier <[e-mail]>
 */
class Twig_NodeVisitor_Sandbox extends Twig_BaseNodeVisitor {
  protected $inAModule = false;
  protected $tags;
  protected $filters;
  protected $functions;

  /**
   * {@inheritdoc}
   */
  protected function doEnterNode(Twig_Node $node, Twig_Environment $env) {
    if ($node instanceof Twig_Node_Module) {
      $this->inAModule = true;
      $this->tags = array();
      $this->filters = array();
      $this->functions = array();
      return $node;
    }
    elseif ($this->inAModule) {

      // look for tags
      if ($node
        ->getNodeTag() && !isset($this->tags[$node
        ->getNodeTag()])) {
        $this->tags[$node
          ->getNodeTag()] = $node;
      }

      // look for filters
      if ($node instanceof Twig_Node_Expression_Filter && !isset($this->filters[$node
        ->getNode('filter')
        ->getAttribute('value')])) {
        $this->filters[$node
          ->getNode('filter')
          ->getAttribute('value')] = $node;
      }

      // look for functions
      if ($node instanceof Twig_Node_Expression_Function && !isset($this->functions[$node
        ->getAttribute('name')])) {
        $this->functions[$node
          ->getAttribute('name')] = $node;
      }

      // wrap print to check __toString() calls
      if ($node instanceof Twig_Node_Print) {
        return new Twig_Node_SandboxedPrint($node
          ->getNode('expr'), $node
          ->getLine(), $node
          ->getNodeTag());
      }
    }
    return $node;
  }

  /**
   * {@inheritdoc}
   */
  protected function doLeaveNode(Twig_Node $node, Twig_Environment $env) {
    if ($node instanceof Twig_Node_Module) {
      $this->inAModule = false;
      $node
        ->setNode('display_start', new Twig_Node(array(
        new Twig_Node_CheckSecurity($this->filters, $this->tags, $this->functions),
        $node
          ->getNode('display_start'),
      )));
    }
    return $node;
  }

  /**
   * {@inheritdoc}
   */
  public function getPriority() {
    return 0;
  }

}

Classes

Name	Description
Twig_NodeVisitor_Sandbox	Twig_NodeVisitor_Sandbox implements sandboxing.