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<?php |
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declare(strict_types = 1); |
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namespace drupol\BelgianNationalNumberFaker\Provider; |
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use Faker\Provider\Base; |
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use Faker\Provider\DateTime; |
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/** |
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* Class BelgianNationalNumber. |
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*/ |
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class BelgianNationalNumber extends Base |
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{ |
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/** |
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* Generate a random Belgian National Number. |
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* |
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* @return string |
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* |
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* @see https://en.wikipedia.org/wiki/National_identification_number |
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*/ |
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public function belgianNationalIdentificationNumber(): string |
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{ |
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do { |
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$probe = \mb_substr(DateTime::date('Ymd'), 2) . static::randomNumber(5); |
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} while (false === static::isValidNationalNumber($probe)); |
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return $probe; |
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} |
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/** |
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* Check if the number is a valid national number. |
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* |
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* @param string $national_number |
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* The number. |
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* |
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* @return bool |
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* True if validated, false otherwise. |
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*/ |
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private static function isValidNationalNumber(string $national_number): bool |
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{ |
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$national_number = \filter_var($national_number, \FILTER_SANITIZE_NUMBER_INT); |
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if (false === $national_number) { |
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return false; |
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} |
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$allowedCharactersPattern = '/^[0-9\\ \\-]+$/'; |
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$nonNumericPattern = '/\\D/'; |
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if (1 !== \preg_match($allowedCharactersPattern, $national_number)) { |
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return false; |
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} |
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$national_number = \preg_replace($nonNumericPattern, '', $national_number); |
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if (null === $national_number) { |
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return false; |
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} |
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if (11 !== \mb_strlen($national_number)) { |
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return false; |
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} |
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$birthDatePart = (int) \mb_substr($national_number, 0, 6); |
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$counterPart = (int) \mb_substr($national_number, 6, 3); |
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$controlPart = (int) \mb_substr($national_number, 9, 2); |
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// 1. CONTROL NUMBER CHECKING |
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$born2kOrLater = false; |
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$calculatedControl = 97 - (($birthDatePart . $counterPart) % 97); |
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if ($calculatedControl !== $controlPart) { |
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$born2kOrLater = true; |
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$calculatedControl = 97 - (('2' . $birthDatePart . $counterPart) % 97); |
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if ($calculatedControl !== $controlPart) { |
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return false; |
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} |
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} |
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// 2. BIRTHDATE CHECKING |
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$birthDate = true === $born2kOrLater ? |
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'20' . $birthDatePart : |
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'19' . $birthDatePart; |
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if (!\checkdate( |
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(int) \mb_substr($birthDate, 4, 2), |
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(int) \mb_substr($birthDate, 6, 2), |
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(int) \mb_substr($birthDate, 0, 4) |
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) |
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) { |
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return false; |
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} |
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// 3. COUNTER CHECKING |
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if (1 > $counterPart || 997 < $counterPart) { |
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return false; |
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} |
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return true; |
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} |
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} |
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drupol /
belgian-national-number-faker
