<?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:----MzM0NTU4ODYwNzY5NzM1NiAyMzMwMzQ4MjU3NjkzNjA0IDUwMDIyNzAxMzY0MDcxNjA=