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<?php |
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namespace Brazanation\Documents; |
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use Brazanation\Documents\Exception\InvalidDocument as InvalidDocumentException; |
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final class Cnpj implements DocumentInterface |
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{ |
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const LENGTH = 14; |
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const LABEL = 'CNPJ'; |
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const REGEX = '/^([\d]{2,3})([\d]{3})([\d]{3})([\d]{4})([\d]{2})$/'; |
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const FORMAT_REGEX = '/^[\d]{2,3}\.[\d]{3}\.[\d]{3}\/[\d]{4}-[\d]{2}$/'; |
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/** |
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* @var string |
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*/ |
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private $cnpj; |
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/** |
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* Cnpj constructor. |
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* |
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* @param string $cnpj Only accept numbers |
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*/ |
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public function __construct($cnpj) |
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{ |
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$cnpj = preg_replace('/\D/', '', $cnpj); |
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$this->validate($cnpj); |
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$this->cnpj = $cnpj; |
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} |
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/** |
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* Check if CNPJ is not empty and is a valid number. |
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* |
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* @param string $number |
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* |
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* @throws InvalidDocumentException when CNPJ is empty |
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* @throws InvalidDocumentException when CNPJ is not valid number |
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*/ |
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private function validate($number) |
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{ |
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if (empty($number)) { |
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throw InvalidDocumentException::notEmpty(static::LABEL); |
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} |
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if (!$this->isValid($number)) { |
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throw InvalidDocumentException::isNotValid(static::LABEL, $number); |
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} |
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} |
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/** |
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* Validates cnpj is a valid number. |
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* |
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* @param string $number A number to be validate. |
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* |
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* @return bool Returns true if it is a valid number, otherwise false. |
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*/ |
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private function isValid($number) |
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{ |
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if (strlen($number) != static::LENGTH) { |
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return false; |
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} |
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if (preg_match("/^{$number[0]}{" . static::LENGTH . '}$/', $number)) { |
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return false; |
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} |
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$digits = $this->calculateDigits(substr($number, 0, -2)); |
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return $digits === substr($number, -2); |
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} |
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/** |
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* Formats CNPJ number |
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* |
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* @return string Returns formatted number, such as: 00.000.000/0000-00 |
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*/ |
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public function format() |
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{ |
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return preg_replace(static::REGEX, '$1.$2.$3/$4-$5', $this->cnpj); |
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} |
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/** |
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* Returns the CNPJ number |
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* |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return $this->cnpj; |
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} |
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/** |
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* Calculate check digits from base number. |
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* |
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* @param string $number Base numeric section to be calculate your digit. |
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* |
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* @return string |
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*/ |
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private function calculateDigits($number) |
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{ |
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$calculator = new DigitCalculator($number); |
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$calculator->useComplementaryInsteadOfModule(); |
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$calculator->replaceWhen('0', 10, 11); |
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$calculator->withModule(DigitCalculator::MODULE_11); |
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$firstDigit = $calculator->calculate(); |
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$calculator->addDigit($firstDigit); |
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$secondDigit = $calculator->calculate(); |
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return "{$firstDigit}{$secondDigit}"; |
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} |
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} |
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brazanation /
php-documents
