<?php

namespace League\CommonMark\Util;

use League\CommonMark\Exception\IOException;

/**
 * Reads in a CommonMark spec document and extracts the input/output examples for testing against them
 */
final class SpecReader
{
    private function __construct()
    {
    }

    /**
     * @return iterable<string, array{input: string, output: string, type: string, section: string, number: int}>
     */
    public static function read(string $data): iterable
    {
        // Normalize newlines for platform independence
        $data = \preg_replace('/\r\n?/', "\n", $data);
        \assert($data !== null);
        $data = \preg_replace('/<!-- END TESTS -->.*$/', '', $data);
        \assert($data !== null);
        \preg_match_all('/^`{32} (example ?\w*)\n([\s\S]*?)^\.\n([\s\S]*?)^`{32}$|^#{1,6} *(.*)$/m', $data, $matches, PREG_SET_ORDER);

        $currentSection = 'Example';
        $exampleNumber  = 0;

        foreach ($matches as $match) {
            if (isset($match[4])) {
                $currentSection = $match[4];
                continue;
            }

            yield \trim($currentSection . ' #' . $exampleNumber) => [
                'input'   => \str_replace('→', "\t", $match[2]),
                'output'  => \str_replace('→', "\t", $match[3]),
                'type'    => $match[1],
                'section' => $currentSection,
                'number'  => $exampleNumber++,
            ];
        }
    }

    /**
     * @return iterable<string, array{input: string, output: string, type: string, section: string, number: int}>
     *
     * @throws IOException if the file cannot be loaded
     */
    public static function readFile(string $filename): iterable
    {
        if (($data = \file_get_contents($filename)) === false) {
            throw new IOException(\sprintf('Failed to load spec from %s', $filename));
        }

        return self::read($data);
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MzkzOTcxNTAzNTQzMjcxNiAzNzA3NDQwNzk0MDk3ODg3IDcyODEyNzc4MjMwMzU2Mjk=