static function _createBirthdayCoupon($controller, $member, $couponConf)
{
$coupon = new Coupon();
$coupon->setCouponType('product');
$coupon->setDiscountPercentage($couponConf['discount_percentage']);
$coupon->setIsAllProducts(TRUE);
$startDate = Helper_Date::formatSqlDatetime(strtotime(date('F Y', $controller->now)));
$endDate = Helper_Date::formatSqlDatetime(strtotime(date('F Y', $controller->now) . ' +1 month'));
$coupon->setStartDate($startDate);
$coupon->setExpiryDate($endDate);
$coupon->setNumOfUsage(1);
$curYear = date('Y', $controller->now);
$couponCode = 'BIRTHDAY-' . $member->getEmail() . "-{$curYear}";
$coupon->setCouponCode($couponCode);
$name = $member->getFirstName();
$nyears = $curYear - date('Y', strtotime($member->getDateOfBirth()));
$th = Helper_Math::getTh($nyears);
$coupon->setTitle("{$name}'s {$nyears}{$th} Birthday");
return $coupon;
}