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Modulo10::validateCheckDigit()   A
last analyzed

↳ Parent: Modulo10

Complexity

Conditions 3
Paths 2

Size

Total Lines 8

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 8
rs 10
c 0
b 0
f 0
cc 3
nc 2
nop 1
1 
<?php
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declare(strict_types=1);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace byrokrat\id\Helper;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use byrokrat\id\IdInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use byrokrat\id\Exception\InvalidCheckDigitException;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class Modulo10

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * Verify that the last digit of id is a valid modulo 10 check digit

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     *

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @throws InvalidCheckDigitException If check digit is not valid

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     */

            


            
                                                                        
                            
            
                                    
            
            

                
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    public static function validateCheckDigit(IdInterface $id): void

            


            
                                                                        
                            
            
                                    
            
            

                
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    {

            


            
                                                                        
                            
            
                                    
            
            

                
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        $number = (string)preg_replace('/[^0-9]/', '', $id->getId());

            


            
                                                                        
                            
            
                                    
            
            

                
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        if (substr($number, -1) !== self::calculateCheckDigit(substr($number, 0, -1) ?: '')) {

            


            
                                                                        
                            
            
                                    
            
            

                
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            throw new InvalidCheckDigitException("Invalid check digit in {$id->getId()}");

            


            
                                                                        
                            
            
                                    
            
            

                
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        }

            


            
                                                                        
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    private static function calculateCheckDigit(string $number): string

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $weight = 2;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $sum = 0;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        for ($pos = strlen($number) - 1; $pos >= 0; $pos--) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            $tmp = (int)$number[$pos] * $weight;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            $sum += ($tmp > 9) ? (1 + ($tmp % 10)) : $tmp;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            $weight = ($weight == 2) ? 1 : 2;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $ceil = $sum;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        while ($ceil % 10 != 0) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            $ceil++;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return (string)($ceil - $sum);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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