<?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:----NjkwNjUxMTI4NzkyMTI5NCAyMjI4NDk5NDAzMTc0NDQgNTMyNDQ0NzMyMTkyMDkyMg==