55 lines
1.5 KiB
PHP
55 lines
1.5 KiB
PHP
<?php
|
|
|
|
/*
|
|
* This file is part of Respect/Validation.
|
|
*
|
|
* (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
|
|
*
|
|
* For the full copyright and license information, please view the "LICENSE.md"
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
namespace Respect\Validation\Rules;
|
|
|
|
use Respect\Validation\Exceptions\ComponentException;
|
|
use Respect\Validation\Exceptions\ValidationException;
|
|
|
|
/**
|
|
* @author David Meister <thedavidmeister@gmail.com>
|
|
*/
|
|
class Factor extends AbstractRule
|
|
{
|
|
public $dividend;
|
|
|
|
public function __construct($dividend)
|
|
{
|
|
if (!is_numeric($dividend) || (int) $dividend != $dividend) {
|
|
$message = 'Dividend %s must be an integer';
|
|
throw new ComponentException(sprintf($message, ValidationException::stringify($dividend)));
|
|
}
|
|
|
|
$this->dividend = (int) $dividend;
|
|
}
|
|
|
|
public function validate($input)
|
|
{
|
|
// 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;
|
|
}
|
|
|
|
$input = (int) abs($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);
|
|
}
|
|
}
|