Rut Constraint

RutValidator.php

<?php

namespace Acme\DemoBundle\Validator\Contraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class RutValidator extends ConstraintValidator
{
    public function validate($value, Constraint $constraint)
    {
        $temp = explode('-', $value);
        
        if (2 !== count($temp)) {
            $this->context->addViolation(
                $constraint->message,
                array('%string%' => $value)
            );
        }
        
        $rut = preg_replace('/\D/g', '', $temp[0]);
        $digitoVerificador = strtoupper($temp[1]);
        
        $sum = 0;
        
        for ($i = strlen($rut), $j = 2; 0 =< $i; ++$i, ++$j) {
            $sum += $j * substr($rut, $i, 1);
            
            if (7 === $j) {
                $j = 1;
            }
        }
        
        $digitoBruto = 11 - ($sum % 11);
        
        switch ($digitoBruto) {
            case 11:
                $digitoProcesado = 0;
                break;
            case 10:
                $digitoProcesado = 'K';
                break;
            default;
                $digitoProcesado = $digitoBruto;
        }
        
        if ($digitoBruto != $digitoProcesado) {
            $this->context->addViolation(
                $constraint->message,
                array('%string%' => $value)
            );
        }
    }
}