Luhn::validate() - Code Metrics - Inspection of "Create "Luhn" rule" - Respect/Validation - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#868)

by Henrique

created 2017-10-16 18:39 UTC

Luhn::validate() A

↳ Parent: Luhn

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	2.0625

Importance

Changes

Metric	Value
dl	0
loc	8
ccs	3
cts	4
cp	0.75
rs	9.4285
c	0
b	0
f	0
cc	2
eloc	4
nc	2
nop	1
crap	2.0625

<?php

/*
 * This file is part of Respect/Validation.
 *
 * (c) Alexandre Gomes Gaigalas <[email protected]>
 *
 * For the full copyright and license information, please view the "LICENSE.md"
 * file that was distributed with this source code.
 */

namespace Respect\Validation\Rules;

/**
 * @link https://en.wikipedia.org/wiki/Luhn_algorithm
 */
class Luhn extends AbstractRule
{
    /**
     * {@inheritdoc}
     */
    public function validate($input)
    {
        if (!(new Digit())->validate($input)) {
            return false;
        }

        return $this->isValid($input);
    }

    private function isValid($input): bool
    {
        $sum = 0;
        $numDigits = strlen($input);
        $parity = $numDigits % 2;
        for ($i = 0; $i < $numDigits; ++$i) {
            $digit = substr($input, $i, 1);
            if ($parity == ($i % 2)) {
                $digit <<= 1;
                if (9 < $digit) {
                    $digit = $digit - 9;
                }
            }
            $sum += $digit;
        }

        return 0 == ($sum % 10);
    }
}


1		<?php
2
3		/*
4		* This file is part of Respect/Validation.
5		*
6		* (c) Alexandre Gomes Gaigalas <[email protected]>
7		*
8		* For the full copyright and license information, please view the "LICENSE.md"
9		* file that was distributed with this source code.
10		*/
11
12		namespace Respect\Validation\Rules;
13
14		/**
15		* @link https://en.wikipedia.org/wiki/Luhn_algorithm
16		*/
17		class Luhn extends AbstractRule
18		{
19		/**
20		* {@inheritdoc}
21		*/
22	8	public function validate($input)
23		{
24	8	if (!(new Digit())->validate($input)) {
25		return false;
26		}
27
28	8	return $this->isValid($input);
29		}
30
31	8	private function isValid($input): bool
32		{
33	8	$sum = 0;
34	8	$numDigits = strlen($input);
35	8	$parity = $numDigits % 2;
36	8	for ($i = 0; $i < $numDigits; ++$i) {
37	8	$digit = substr($input, $i, 1);
38	8	if ($parity == ($i % 2)) {
39	8	$digit <<= 1;
40	8	if (9 < $digit) {
41	4	$digit = $digit - 9;
42		}
43		}
44	8	$sum += $digit;
45		}
46
47	8	return 0 == ($sum % 10);
48		}
49		}
50

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Pull Request — master (#868)

Luhn::validate() A

Complexity

Size

Duplication

Code Coverage

Importance

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