<?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:----MTcxMzQxNjM5OTA5Mzg5OCAyMDc4NDY3Mzg0MDU4Njk1IDQ5NDkwODI1Mjc3NDE=