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Pesel.php
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Pesel.php
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<?php
/*
* KKSzymanowski/PESEL
* Walidacja numeru PESEL
*
* @package KKSzymanowski/PESEL
* @author Kuba Szymanowski <kuba.szymanowski@inf24.pl>
* @link https://github.com/kkszymanowski/pesel
* @license MIT
*/
namespace Pesel;
use DateTime;
use InvalidArgumentException;
use Pesel\Exceptions\InvalidBirthDateException;
use Pesel\Exceptions\InvalidCharactersException;
use Pesel\Exceptions\InvalidChecksumException;
use Pesel\Exceptions\InvalidGenderInputException;
use Pesel\Exceptions\InvalidLengthException;
class Pesel
{
const GENDER_FEMALE = 0;
const GENDER_MALE = 1;
/**
* @var string
*/
protected $number;
/**
* @var array
*/
protected $errorMessages = [
'invalidLength' => 'Nieprawidłowa długość numeru PESEL.',
'invalidCharacters' => 'Numer PESEL może zawierać tylko cyfry.',
'invalidChecksum' => 'Numer PESEL posiada niepoprawną sumę kontrolną.',
'invalidBirthDate' => 'Numer PESEL zawiera nieprawidłową datę urodzenia.',
];
/**
* @var int
*/
protected static $genderDigit = 9;
/**
* @var int
*/
protected static $peselLength = 11;
/**
* Weights assigned to each digit.
*
* Used when calculating checksum.
*
* @var array
*/
protected static $weights = [1, 3, 7, 9, 1, 3, 7, 9, 1, 3, 1];
/**
* @param string $number
* @param array $errorMessages Deprecated, please catch a specific exception extending PeselValidationException
*
* @throws InvalidArgumentException when PESEL number is invalid.
*/
public function __construct($number, $errorMessages = [])
{
$this->errorMessages = array_merge($this->errorMessages, $errorMessages);
$this->number = $number;
$this->validateLength();
$this->validateDigitsOnly();
$this->validateChecksum();
$this->validateBirthDateDigits();
}
/**
* A glorified constructor.
*
* @param string $number
*
* @throws InvalidArgumentException when PESEL number is invalid.
*
* @return static
*/
public static function create($number)
{
return new static($number);
}
/**
* Check if provided number is valid.
*
* @param string $number
*
* @return bool
*/
public static function isValid($number)
{
try {
new static($number);
return true;
} catch (InvalidArgumentException $e) {
return false;
}
}
/**
* @return string
*/
public function getNumber()
{
return $this->number;
}
/**
* Get birth date encoded in the number.
*
* @return DateTime
*/
public function getBirthDate()
{
[$year, $month, $day] = $this->getYearMonthDate();
return DateTime::createFromFormat('Y-m-d H:i:s', "$year-$month-$day 00:00:00");
}
/**
* Check if PESEL number contains provided birth date.
*
* @param DateTime $birthDate
*
* @return bool
*/
public function hasBirthDate(DateTime $birthDate)
{
return $this->getBirthDate() == (clone $birthDate)->setTime(0, 0, 0);
}
/**
* Get gender encoded in the number.
*
* @return int
*/
public function getGender()
{
return $this->number[static::$genderDigit] % 2;
}
/**
* Check if PESEL number contains provided gender.
*
* @param int $gender Pesel::GENDER_FEMALE or Pesel::GENDER_MALE
*
* @throws InvalidArgumentException when provided gender is neither Pesel::GENDER_FEMALE nor PESEL::GENDER_MALE
*
* @return bool
*/
public function hasGender($gender)
{
static::validateGenderInput($gender);
return $this->getGender() == $gender;
}
/**
* String representation.
*
* @return string
*/
public function __toString()
{
return $this->number;
}
/**
* @throws InvalidArgumentException when number has invalid length
*/
protected function validateLength()
{
if (strlen($this->number) !== self::$peselLength) {
throw new InvalidLengthException($this->errorMessages['invalidLength']);
}
}
/**
* @throws InvalidArgumentException when number contains non-digits
*/
protected function validateDigitsOnly()
{
if (ctype_digit($this->number) === false) {
throw new InvalidCharactersException($this->errorMessages['invalidCharacters']);
}
}
/**
* @throws InvalidArgumentException on invalid checksum
*/
protected function validateChecksum()
{
$digitArray = str_split($this->number);
$checksum = array_reduce(array_keys($digitArray), function ($carry, $index) use ($digitArray) {
return $carry + static::$weights[$index] * $digitArray[$index];
});
if ($checksum % 10 !== 0) {
throw new InvalidChecksumException($this->errorMessages['invalidChecksum']);
}
}
/**
* @throws InvalidArgumentException on invalid birth date digits
*/
protected function validateBirthDateDigits()
{
[$year, $month, $day] = $this->getYearMonthDate();
if ($year < 1800 || $year > 2299) {
throw new InvalidBirthDateException($this->errorMessages['invalidBirthDate']);
}
if ($month < 1 || $month > 12) {
throw new InvalidBirthDateException($this->errorMessages['invalidBirthDate']);
}
if ($day < 1 || $day > cal_days_in_month(CAL_GREGORIAN, $month, $year)) {
throw new InvalidBirthDateException($this->errorMessages['invalidBirthDate']);
}
}
/**
* Check if provided gender matches accepted format.
*
* @param int $gender Pesel::GENDER_FEMALE or Pesel::GENDER_MALE
*
* @throws InvalidArgumentException when provided gender is not Pesel::GENDER_FEMALE nor PESEL::GENDER_MALE
*/
protected static function validateGenderInput($gender)
{
if ($gender !== static::GENDER_FEMALE &&
$gender !== static::GENDER_MALE &&
$gender !== (string) self::GENDER_FEMALE &&
$gender !== (string) self::GENDER_MALE
) {
throw new InvalidGenderInputException('Podano płeć w niepoprawnym formacie');
}
}
protected function getYearMonthDate()
{
$year = substr($this->number, 0, 2);
$month = substr($this->number, 2, 2);
$day = substr($this->number, 4, 2);
// 0 - 9
$century = substr($this->number, 2, 1);
// 2,3,4,5,6,7,8,9,10,11
$century += 2;
// 2,3,4,5,6,7,8,9,0,1
$century %= 10;
// 1,1,2,2,3,3,4,4,0,0
$century = round($century / 2, 0, PHP_ROUND_HALF_DOWN);
// 19,19,20,20,21,21,22,22,18,18
$century += 18;
$year = $century.$year;
$month = str_pad($month % 20, 2, '0', STR_PAD_LEFT);
return [$year, $month, $day];
}
}