<?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:----MTYwNTMwODM1ODkyNzM2MCA1NTI0MjQyNDc0MTUyMDA4IDk5NjMyODI1MjM0NDkyMDA=