1<?php
2
3/*
4 * This file is part of the Symfony package.
5 *
6 * (c) Fabien Potencier <fabien@symfony.com>
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 Symfony\Component\CssSelector\Parser\Shortcut;
13
14use Symfony\Component\CssSelector\Node\ElementNode;
15use Symfony\Component\CssSelector\Node\SelectorNode;
16use Symfony\Component\CssSelector\Parser\ParserInterface;
17
18/**
19 * CSS selector element parser shortcut.
20 *
21 * This component is a port of the Python cssselect library,
22 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
23 *
24 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
25 *
26 * @internal
27 */
28class ElementParser implements ParserInterface
29{
30    /**
31     * {@inheritdoc}
32     */
33    public function parse(string $source): array
34    {
35        // Matches an optional namespace, required element or `*`
36        // $source = 'testns|testel';
37        // $matches = array (size=3)
38        //     0 => string 'testns|testel' (length=13)
39        //     1 => string 'testns' (length=6)
40        //     2 => string 'testel' (length=6)
41        if (preg_match('/^(?:([a-z]++)\|)?([\w-]++|\*)$/i', trim($source), $matches)) {
42            return [new SelectorNode(new ElementNode($matches[1] ?: null, $matches[2]))];
43        }
44
45        return [];
46    }
47}
48