Subversion-Projekte lars-tiefland.laravel_shop

<?php

declare(strict_types=1);

/*

 * This file is part of the league/commonmark package.

 *

 * (c) Colin O'Dell <colinodell@gmail.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace League\CommonMark\Extension\FrontMatter;

use League\CommonMark\Extension\FrontMatter\Data\FrontMatterDataParserInterface;

use League\CommonMark\Extension\FrontMatter\Exception\InvalidFrontMatterException;

use League\CommonMark\Extension\FrontMatter\Input\MarkdownInputWithFrontMatter;

use League\CommonMark\Parser\Cursor;

final class FrontMatterParser implements FrontMatterParserInterface

{

    /** @psalm-readonly */

    private FrontMatterDataParserInterface $frontMatterParser;

    private const REGEX_FRONT_MATTER = '/^---\\R.*?\\R---\\R/s';

    public function __construct(FrontMatterDataParserInterface $frontMatterParser)

    {

        $this->frontMatterParser = $frontMatterParser;

    }

    /**

     * @throws InvalidFrontMatterException if the front matter cannot be parsed

     */

    public function parse(string $markdownContent): MarkdownInputWithFrontMatter

    {

        $cursor = new Cursor($markdownContent);

        // Locate the front matter

        $frontMatter = $cursor->match(self::REGEX_FRONT_MATTER);

        if ($frontMatter === null) {

            return new MarkdownInputWithFrontMatter($markdownContent);

        }

        // Trim the last line (ending ---s and newline)

        $frontMatter = \preg_replace('/---\R$/', '', $frontMatter);

        if ($frontMatter === null) {

            return new MarkdownInputWithFrontMatter($markdownContent);

        }

        // Parse the resulting YAML data

        $data = $this->frontMatterParser->parse($frontMatter);

        // Advance through any remaining newlines which separated the front matter from the Markdown text

        $trailingNewlines = $cursor->match('/^\R+/');

        // Calculate how many lines the Markdown is offset from the front matter by counting the number of newlines

        // Don't forget to add 1 because we stripped one out when trimming the trailing delims

        $lineOffset = \preg_match_all('/\R/', $frontMatter . $trailingNewlines) + 1;

        return new MarkdownInputWithFrontMatter($cursor->getRemainder(), $lineOffset, $data);

    }

}