Respect\Validation\Rules\PolishIdCard::validate()

Complexity

Conditions	8
Paths	6

Size

Total Lines	23
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    public function validate($input): bool
    {
        if (!preg_match('/^[A-Z0-9]{9}$/', $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 <= self::ASCII_CODE_9) {
                return false;
            }

            if ($i > 2 && $code >= self::ASCII_CODE_A) {
                return false;
            }

            $difference = $code <= self::ASCII_CODE_9 ? self::ASCII_CODE_0 : self::ASCII_CODE_7;
            $weightedSum += ($code - $difference) * $weights[$i];
        }

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