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<?php
namespace LeKoala\Tin\Algo;
use LeKoala\Tin\Util\DateUtil;
use LeKoala\Tin\Util\StringUtil;
/**
* Latvia
*/
class LVAlgorithm extends TINAlgorithm
{
const LENGTH = 11;
public function validate(string $tin)
if (!$this->isFollowLength($tin)) {
return StatusCode::INVALID_LENGTH;
}
if (!$this->isValidDate($tin)) {
return StatusCode::INVALID_PATTERN;
return StatusCode::VALID;
public function isFollowLength(string $tin)
return StringUtil::isFollowLength($tin, self::LENGTH);
* @param string $tin
* @return boolean
private function isValidDate(string $tin)
$c1c2 = StringUtil::substring($tin, 0, 2);
if ($c1c2 == '32') {
return true;
$day = intval($c1c2);
$month = intval(StringUtil::substring($tin, 2, 4));
$year = intval(StringUtil::substring($tin, 4, 6));
$y1 = DateUtil::validate(1900 + $year, $month, $day);
$y2 = DateUtil::validate(2000 + $year, $month, $day);
if (!$y1 || !$y2) {
return false;