Luhn::isValid() - Code Metrics - Inspection of "Apply contribution guidelines to "Extension" rule" - Respect/Validation - Measure and Improve Code Quality continuously with Scrutinizer

Completed

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by Henrique

created 2018-09-24 19:37 UTC

Luhn::isValid() A

↳ Parent: Luhn

Complexity

Conditions	4
Paths	4

Size

Total Lines	17
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	12
CRAP Score	4

Importance

Changes

Metric	Value
eloc	11
dl	0
loc	17
c	0
b	0
f	0
ccs	12
cts	12
cp	1
rs	9.9
cc	4
nc	4
nop	1
crap	4

<?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.
 */

declare(strict_types=1);

namespace Respect\Validation\Rules;

use function mb_strlen;
use function mb_substr;

/**
 * Validate whether a given input is a Luhn number.
 *
 * @see https://en.wikipedia.org/wiki/Luhn_algorithm
 *
 * @author Alexander Gorshkov <[email protected]>
 * @author Danilo Correa <[email protected]>
 * @author Henrique Moody <[email protected]>
 */
final class Luhn extends AbstractRule
{
    /**
     * {@inheritdoc}
     */
    public function validate($input): bool
    {
        if (!(new Digit())->validate($input)) {
            return false;
        }

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

    private function isValid(string $input): bool
    {
        $sum = 0;
        $numDigits = mb_strlen($input);
        $parity = $numDigits % 2;
        for ($i = 0; $i < $numDigits; ++$i) {
            $digit = mb_substr($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		declare(strict_types=1);
13
14		namespace Respect\Validation\Rules;
15
16		use function mb_strlen;
17		use function mb_substr;
18
19		/**
20		* Validate whether a given input is a Luhn number.
21		*
22		* @see https://en.wikipedia.org/wiki/Luhn_algorithm
23		*
24		* @author Alexander Gorshkov <[email protected]>
25		* @author Danilo Correa <[email protected]>
26		* @author Henrique Moody <[email protected]>
27		*/
28		final class Luhn extends AbstractRule
29		{
30		/**
31		* {@inheritdoc}
32		*/
33	14	public function validate($input): bool
34		{
35	14	if (!(new Digit())->validate($input)) {
36	5	return false;
37		}
38
39	9	return $this->isValid((string) $input);
40		}
41
42	9	private function isValid(string $input): bool
43		{
44	9	$sum = 0;
45	9	$numDigits = mb_strlen($input);
46	9	$parity = $numDigits % 2;
47	9	for ($i = 0; $i < $numDigits; ++$i) {
48	9	$digit = mb_substr($input, $i, 1);
49	9	if ($parity == ($i % 2)) {
50	8	$digit <<= 1;
51	8	if (9 < $digit) {
52	6	$digit = $digit - 9;
53		}
54		}
55	9	$sum += $digit;
56		}
57
58	9	return 0 == ($sum % 10);
59		}
60		}
61

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Luhn::isValid() A

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