1<?php
2
3/*
4 * This file is part of Twig.
5 *
6 * (c) Fabien Potencier
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Twig\TokenParser;
13
14use Twig\Error\SyntaxError;
15use Twig\Node\IncludeNode;
16use Twig\Node\SandboxNode;
17use Twig\Node\TextNode;
18use Twig\Token;
19
20/**
21 * Marks a section of a template as untrusted code that must be evaluated in the sandbox mode.
22 *
23 *    {% sandbox %}
24 *        {% include 'user.html' %}
25 *    {% endsandbox %}
26 *
27 * @see https://twig.symfony.com/doc/api.html#sandbox-extension for details
28 */
29final class SandboxTokenParser extends AbstractTokenParser
30{
31    public function parse(Token $token)
32    {
33        $stream = $this->parser->getStream();
34        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
35        $body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
36        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
37
38        // in a sandbox tag, only include tags are allowed
39        if (!$body instanceof IncludeNode) {
40            foreach ($body as $node) {
41                if ($node instanceof TextNode && ctype_space($node->getAttribute('data'))) {
42                    continue;
43                }
44
45                if (!$node instanceof IncludeNode) {
46                    throw new SyntaxError('Only "include" tags are allowed within a "sandbox" section.', $node->getTemplateLine(), $stream->getSourceContext());
47                }
48            }
49        }
50
51        return new SandboxNode($body, $token->getLine(), $this->getTag());
52    }
53
54    public function decideBlockEnd(Token $token)
55    {
56        return $token->test('endsandbox');
57    }
58
59    public function getTag()
60    {
61        return 'sandbox';
62    }
63}
64
65class_alias('Twig\TokenParser\SandboxTokenParser', 'Twig_TokenParser_Sandbox');
66