Respect\Validation\Rules\Locale\PlIdentityCard::isValid()

Complexity

Conditions	8
Paths	6

Size

Total Lines	23
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	13
CRAP Score	8.0231

Importance

Changes

0

<?php
    public function isValid($input): bool
    {
        if (!preg_match('/^[A-Z0-9]{9}$/', $input)) {
            return false;
        }

        $weights = [7, 3, 1, 0, 7, 3, 1, 7, 3];
        $weightedSum = 0;
        for ($i = 0; $i < 9; ++$i) {
            $code = ord($input[$i]);
            if ($i < 3 && $code <= 57) { // 57 is "9"
                return false;
            }

            if ($i > 2 && $code >= 65) { // 65 is "A"
                return false;
            }

            $difference = $code <= 57 ? 48 : 55; // 48 is "0"
            $weightedSum += ($code - $difference) * $weights[$i];
        }

        return $weightedSum % 10 == $input[3];
    }