<?php

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

    /** @psalm-readonly */
    private FrontMatterDataParserInterface $frontMatterParser;

    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);
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NjgxNDcxODEyMDk1NjQ4OSA0NDc4OTI1OTE4ODg2NzY0IDczNDE0MTk0OTc1Mjg3MzI=