<?php

/**
 * This file is part of the ramsey/uuid library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey <[email protected]>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Converter;

/**
 * A number converter converts UUIDs from hexadecimal characters into representations of integers and vice versa
 *
 * @immutable
 */
interface NumberConverterInterface
{
    /**
     * Converts a hexadecimal number into a string integer representation of the number
     *
     * The integer representation returned is a string representation of the integer to accommodate unsigned integers
     * that are greater than `PHP_INT_MAX`.
     *
     * @param string $hex The hexadecimal string representation to convert
     *
     * @return numeric-string String representation of an integer
     *
     * @pure
     */
    public function fromHex(string $hex): string;

    /**
     * Converts a string integer representation into a hexadecimal string representation of the number
     *
     * @param string $number A string integer representation to convert; this must be a numeric string to accommodate
     *     unsigned integers that are greater than `PHP_INT_MAX`.
     *
     * @return non-empty-string Hexadecimal string
     *
     * @pure
     */
    public function toHex(string $number): string;
}