LaysenseAuth/vendor/workerman/validation/library/Rules/Factor.php
2024-08-09 22:16:39 +08:00

62 lines
1.4 KiB
PHP

<?php
/*
* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
* SPDX-License-Identifier: MIT
*/
declare(strict_types=1);
namespace Respect\Validation\Rules;
use function abs;
use function is_integer;
use function is_numeric;
/**
* Validates if the input is a factor of the defined dividend.
*
* @author Danilo Correa <danilosilva87@gmail.com>
* @author David Meister <thedavidmeister@gmail.com>
* @author Henrique Moody <henriquemoody@gmail.com>
*/
final class Factor extends AbstractRule
{
/**
* @var int
*/
private $dividend;
/**
* Initializes the rule.
*/
public function __construct(int $dividend)
{
$this->dividend = $dividend;
}
/**
* {@inheritDoc}
*/
public function validate($input): bool
{
// Every integer is a factor of zero, and zero is the only integer that
// has zero for a factor.
if ($this->dividend === 0) {
return true;
}
// Factors must be integers that are not zero.
if (!is_numeric($input) || (int) $input != $input || $input == 0) {
return false;
}
$input = (int) abs((int) $input);
$dividend = (int) abs($this->dividend);
// The dividend divided by the input must be an integer if input is a
// factor of the dividend.
return is_integer($dividend / $input);
}
}