/**
* @param int $length
*
* @throws \Spryker\Zed\Discount\Business\Exception\VoucherEngineException
*
* @return string
*/
protected function getRandomVoucherCode($length)
{
$allowedCharacters = $this->discountConfig->getVoucherCodeCharacters();
if (!$allowedCharacters) {
throw new VoucherEngineException('Configuration for voucher code characters missing.');
}
$consonants = $allowedCharacters[DiscountConfig::KEY_VOUCHER_CODE_CONSONANTS];
$vowels = $allowedCharacters[DiscountConfig::KEY_VOUCHER_CODE_VOWELS];
$numbers = $allowedCharacters[DiscountConfig::KEY_VOUCHER_CODE_NUMBERS];
$code = '';
while (strlen($code) < $length) {
if (count($consonants)) {
$code .= $consonants[random_int(0, count($consonants) - 1)];
}
if (count($vowels)) {
$code .= $vowels[random_int(0, count($vowels) - 1)];
}
if (count($numbers)) {
$code .= $numbers[random_int(0, count($numbers) - 1)];
}
}
return substr($code, 0, $length);
}
