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\ClassNode;
15use Symfony\Component\CssSelector\Node\ElementNode;
16use Symfony\Component\CssSelector\Node\SelectorNode;
17use Symfony\Component\CssSelector\Parser\ParserInterface;
18
19/**
20 * CSS selector class parser shortcut.
21 *
22 * This component is a port of the Python cssselect library,
23 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
24 *
25 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
26 *
27 * @internal
28 */
29class ClassParser implements ParserInterface
30{
31    /**
32     * {@inheritdoc}
33     */
34    public function parse(string $source): array
35    {
36        // Matches an optional namespace, optional element, and required class
37        // $source = 'test|input.ab6bd_field';
38        // $matches = array (size=4)
39        //     0 => string 'test|input.ab6bd_field' (length=22)
40        //     1 => string 'test' (length=4)
41        //     2 => string 'input' (length=5)
42        //     3 => string 'ab6bd_field' (length=11)
43        if (preg_match('/^(?:([a-z]++)\|)?+([\w-]++|\*)?+\.([\w-]++)$/i', trim($source), $matches)) {
44            return [
45                new SelectorNode(new ClassNode(new ElementNode($matches[1] ?: null, $matches[2] ?: null), $matches[3])),
46            ];
47        }
48
49        return [];
50    }
51}
52