/**
* Increase the length of Code if probability is low
*
* @return void
*/
protected function increaseLength()
{
$maxProbability = $this->getMaxProbability() ? $this->getMaxProbability() : self::MAX_PROBABILITY_OF_GUESSING;
$chars = count($this->salesRuleCoupon->getCharset($this->getFormat()));
$size = $this->getQty();
$length = (int) $this->getLength();
$maxCodes = pow($chars, $length);
$probability = $size / $maxCodes;
if ($probability > $maxProbability) {
do {
$length++;
$maxCodes = pow($chars, $length);
$probability = $size / $maxCodes;
} while ($probability > $maxProbability);
$this->setLength($length);
}
}
/**
* Generate Coupons Pool
*
* @throws \Magento\Framework\Model\Exception
* @return $this
*/
public function generatePool()
{
$this->_generatedCount = 0;
$size = $this->getQty();
$maxProbability = $this->getMaxProbability() ? $this->getMaxProbability() : self::MAX_PROBABILITY_OF_GUESSING;
$maxAttempts = $this->getMaxAttempts() ? $this->getMaxAttempts() : self::MAX_GENERATE_ATTEMPTS;
/** @var $coupon \Magento\SalesRule\Model\Coupon */
$coupon = $this->_couponFactory->create();
$chars = count($this->_salesRuleCoupon->getCharset($this->getFormat()));
$length = (int) $this->getLength();
$maxCodes = pow($chars, $length);
$probability = $size / $maxCodes;
//increase the length of Code if probability is low
if ($probability > $maxProbability) {
do {
$length++;
$maxCodes = pow($chars, $length);
$probability = $size / $maxCodes;
} while ($probability > $maxProbability);
$this->setLength($length);
}
$now = $this->dateTime->formatDate($this->_date->gmtTimestamp());
for ($i = 0; $i < $size; $i++) {
$attempt = 0;
do {
if ($attempt >= $maxAttempts) {
throw new \Magento\Framework\Model\Exception(__('We cannot create the requested Coupon Qty. Please check your settings and try again.'));
}
$code = $this->generateCode();
$attempt++;
} while ($this->getResource()->exists($code));
$expirationDate = $this->getToDate();
if ($expirationDate instanceof \Zend_Date) {
$expirationDate = $expirationDate->toString(\Magento\Framework\Stdlib\DateTime::DATETIME_INTERNAL_FORMAT);
}
$coupon->setId(null)->setRuleId($this->getRuleId())->setUsageLimit($this->getUsesPerCoupon())->setUsagePerCustomer($this->getUsesPerCustomer())->setExpirationDate($expirationDate)->setCreatedAt($now)->setType(\Magento\SalesRule\Helper\Coupon::COUPON_TYPE_SPECIFIC_AUTOGENERATED)->setCode($code)->save();
$this->_generatedCount++;
}
return $this;
}
public function testGetCharset()
{
$format = 'format';
$expected = ['a', 'b', 'c'];
$this->assertEquals($expected, $this->helper->getCharset($format));
}
