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<?php |
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namespace SymfonyGreekValidation; |
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use Symfony\Component\Validator\Constraint; |
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use Symfony\Component\Validator\ConstraintValidator; |
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use Symfony\Component\Validator\Exception\UnexpectedTypeException; |
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class AfmValidator extends ConstraintValidator |
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{ |
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public function validate($value, Constraint $constraint) |
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{ |
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if (!$constraint instanceof Afm) { |
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throw new UnexpectedTypeException($constraint, Afm::class); |
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} |
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10 |
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if (empty($value)) { |
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return; |
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} |
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if (!is_numeric($value)) { |
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$this->buildViolation($value, $constraint); |
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return; |
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} |
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$reverseAfm = array_reverse(str_split($value)); |
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$lastDigit = (int)array_shift($reverseAfm); |
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$checksum = $this->calculateChecksum($reverseAfm); |
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$mod = $checksum % 11; |
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if ($this->checkModAgainstLastDigit($mod, $lastDigit)) { |
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return; |
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} |
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$this->buildViolation($value, $constraint); |
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} |
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private function checkModAgainstLastDigit($mod, $lastDigit): bool |
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{ |
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return (10 === $mod && $lastDigit === 0) || ($mod === $lastDigit); |
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} |
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private function calculateChecksum($reverseAfm): int |
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{ |
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$checksum = 0; |
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foreach ($reverseAfm as $index => $value) { |
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$checksum += $value * pow(2, ++$index); |
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} |
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return $checksum; |
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} |
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private function buildViolation($value, $constraint): void |
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{ |
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$this->context->buildViolation($constraint->message) |
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->setParameter('{{ string }}', $value) |
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->addViolation(); |
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} |
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} |
thanosKontos /
greek-validators-symfony
