<?php

namespace Badcow\DNS;

class Classes
{
    public const INTERNET = 'IN';
    public const CSNET = 'CS';
    public const CHAOS = 'CH';
    public const HESIOD = 'HS';

    public const CLASS_IDS = [
            self::CHAOS => 3,
            self::CSNET => 2,
            self::HESIOD => 4,
            self::INTERNET => 1,
        ];

    /** @const string[] */
    public const IDS_CLASSES = [1 => 'IN', 'CS', 'CH', 'HS'];

    /** @var array */
    public static $classes = [
            self::CHAOS => 'CHAOS',
            self::CSNET => 'CSNET',
            self::HESIOD => 'Hesiod',
            self::INTERNET => 'Internet',
        ];

    /**
     * Determine if a class is valid.
     */
    public static function isValid(string $class): bool
    {
        if (array_key_exists($class, self::$classes)) {
            return true;
        }

        return 1 === preg_match('/^CLASS\d+$/', $class);
    }

    /**
     * @throws \InvalidArgumentException
     */
    public static function getClassId(string $className): int
    {
        if (!self::isValid($className)) {
            throw new \InvalidArgumentException(sprintf('Class "%s" is not a valid DNS class.', $className));
        }

        if (1 === preg_match('/^CLASS(\d+)$/', $className, $matches)) {
            return (int) $matches[1];
        }

        return self::CLASS_IDS[$className];
    }

    public static function getClassName(int $classId): string
    {
        if (array_key_exists($classId, self::IDS_CLASSES)) {
            return self::IDS_CLASSES[$classId];
        }

        return 'CLASS'.$classId;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODg2MTMxMzQ0NjM3MDI0NCA5OTQ4NTQxNTg0MzgxODkzIDUwNTYwNTA5MDQ5MTQ5Mjc=