<?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 <ben@benramsey.com>
 * @license http://opensource.org/licenses/MIT MIT
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Type;

use Ramsey\Uuid\Exception\InvalidArgumentException;
use ValueError;

use function assert;
use function is_numeric;
use function preg_match;
use function sprintf;
use function substr;

/**
 * A value object representing an integer
 *
 * This class exists for type-safety purposes, to ensure that integers
 * returned from ramsey/uuid methods as strings are truly integers and not some
 * other kind of string.
 *
 * To support large integers beyond PHP_INT_MAX and PHP_INT_MIN on both 64-bit
 * and 32-bit systems, we store the integers as strings.
 *
 * @psalm-immutable
 */
final class Integer implements NumberInterface
{
    /**
     * @psalm-var numeric-string
     */
    private string $value;

    private bool $isNegative = false;

    public function __construct(float | int | string | self $value)
    {
        $this->value = $value instanceof self ? (string) $value : $this->prepareValue($value);
    }

    public function isNegative(): bool
    {
        return $this->isNegative;
    }

    /**
     * @psalm-return numeric-string
     */
    public function toString(): string
    {
        return $this->value;
    }

    /**
     * @psalm-return numeric-string
     */
    public function __toString(): string
    {
        return $this->toString();
    }

    public function jsonSerialize(): string
    {
        return $this->toString();
    }

    public function serialize(): string
    {
        return $this->toString();
    }

    /**
     * @return array{string: string}
     */
    public function __serialize(): array
    {
        return ['string' => $this->toString()];
    }

    /**
     * Constructs the object from a serialized string representation
     *
     * @param string $data The serialized string representation of the object
     *
     * @psalm-suppress UnusedMethodCall
     */
    public function unserialize(string $data): void
    {
        $this->__construct($data);
    }

    /**
     * @param array{string?: string} $data
     */
    public function __unserialize(array $data): void
    {
        // @codeCoverageIgnoreStart
        if (!isset($data['string'])) {
            throw new ValueError(sprintf('%s(): Argument #1 ($data) is invalid', __METHOD__));
        }
        // @codeCoverageIgnoreEnd

        $this->unserialize($data['string']);
    }

    /**
     * @return numeric-string
     */
    private function prepareValue(float | int | string $value): string
    {
        $value = (string) $value;
        $sign = '+';

        // If the value contains a sign, remove it for digit pattern check.
        if (str_starts_with($value, '-') || str_starts_with($value, '+')) {
            $sign = substr($value, 0, 1);
            $value = substr($value, 1);
        }

        if (!preg_match('/^\d+$/', $value)) {
            throw new InvalidArgumentException(
                'Value must be a signed integer or a string containing only '
                . 'digits 0-9 and, optionally, a sign (+ or -)'
            );
        }

        // Trim any leading zeros.
        $value = ltrim($value, '0');

        // Set to zero if the string is empty after trimming zeros.
        if ($value === '') {
            $value = '0';
        }

        // Add the negative sign back to the value.
        if ($sign === '-' && $value !== '0') {
            $value = $sign . $value;

            /** @psalm-suppress InaccessibleProperty */
            $this->isNegative = true;
        }

        assert(is_numeric($value));

        return $value;
    }
}

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox