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<?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;
}
}
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