Respect\Validation\Rules\NfeAccessKey

Complexity

Total Complexity

8

Size/Duplication

Total Lines	30
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	1

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

1 Method

Rating	Name	Duplication	Size	Complexity
C	validate()	0	22	8

<?php

namespace Respect\Validation\Rules;

/**
 * Rule restrict to Brasil.
 *
 * Valida chave de acesso de NFe.
 * Mais especificamente, relacionada ao DANFE.
 */
class NfeAccessKey extends AbstractRule
{
    /**
     * @see Manual de Integração do Contribuinte v4.0.1 (http://www.nfe.fazenda.gov.br)
     * @param  string  $aK access key
     * @return boolean
     */
    public function validate($aK)
    {
        if (strlen($aK) !== 44) {
            return false;
        }

        $w = array();
        for ($i = 0, $z = 5, $m = 43; $i <= $m; $i++) {
            $z = ($i < $m) ? ($z - 1) == 1 ? 9 : ($z - 1)  : 0;
            $w[] = $z;
        }

        for ($i = 0, $s = 0, $k = 44; $i < $k; ++$i) {
            $s += $aK{ $i }
            * $w[ $i ];
        }

        $s -= (11 * floor($s / 11));
        $v = ($s == 0 || $s == 1) ? 0 : (11 - $s);

        return $v == $aK{ 43 };
    }
}