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Completed
Pull Request — master (#850)
by
unknown
06:21
created

Luhn::verifyMod10()   A

↳ Parent: Luhn

Complexity

Conditions 4
Paths 4

Size

Total Lines 19
Code Lines 13

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 0
CRAP Score 20

Importance

Changes 0
Metric Value
dl 0
loc 19
c 0
b 0
f 0
ccs 0
cts 13
cp 0
rs 9.2
cc 4
eloc 13
nc 4
nop 1
crap 20
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace Respect\Validation\Rules;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class Luhn extends AbstractRule

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function validate($input)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $input = preg_replace('([^0-9])', '', $input);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        if (empty($input)) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            return false;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $this->verifyMod10($input);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * Returns whether the input matches the Luhn algorithm or not.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     *

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param string $input

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     *

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @return bool

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     */

            


            
                                                        
            
                                    
            
            

                
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    private function verifyMod10($input)

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        $sum = 0;

            


            
                                                        
            
                                    
            
            

                
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        $input = strrev($input);

            


            
                                                        
            
                                    
            
            

                
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        for ($i = 0, $inputLength = mb_strlen($input); $i < $inputLength; ++$i) {

            


            
                                                        
            
                                    
            
            

                
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            $current = mb_substr($input, $i, 1);

            


            
                                                        
            
                                    
            
            

                
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            if ($i % 2 === 1) {

            


            
                                                        
            
                                    
            
            

                
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                $current *= 2;

            


            
                                                        
            
                                    
            
            

                
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                if ($current > 9) {

            


            
                                                        
            
                                    
            
            

                
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                    $firstDigit = $current % 10;

            


            
                                                        
            
                                    
            
            

                
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                    $secondDigit = ($current - $firstDigit) / 10;

            


            
                                                        
            
                                    
            
            

                
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                    $current = $firstDigit + $secondDigit;

            


            
                                                        
            
                                    
            
            

                
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                }

            


            
                                                        
            
                                    
            
            

                
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            }

            


            
                                                        
            
                                    
            
            

                
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            $sum += $current;

            


            
                                                        
            
                                    
            
            

                
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        }

            


            
                                                        
            
                                    
            
            

                
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        return $sum % 10 === 0;

            


            
                                                        
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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