byrokrat\banking\Validator\Modulo11::calculateCheckDigit()

Complexity

Conditions	3
Paths	3

Size

Total Lines	17
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	3

Importance

Changes

0

<?php
    public static function calculateCheckDigit(string $number): string
    {
        if (!ctype_digit($number)) {
            throw new LogicException(
                "Number can only contain numerical characters, found '$number'"
            );
        }

        $sum = 0;

        foreach (array_reverse(str_split($number)) as $pos => $digit) {
            $sum += $digit * self::getWeight($pos, 2);
        }

        // Calculate check digit from remainder
        return self::REMAINDER_TO_CHECK_DIGIT_MAP[11 - $sum % 11];
    }