/// <summary>
/// Function to check if the coupon code is valid
/// </summary>
/// <param name="couponCode">Coupon code</param>
/// <param name="userID">User ID</param>
/// <returns>Coupon validation flag</returns>
public int CheckCouponCode(string couponCode, string userID)
{
DataTable dt = objDAL.CheckCouponCode(couponCode);
/*Code for coupon validation
* 0. Error
* 1. Valid
* 2. Invalid coupon: Already used.
* 3. Invalid coupon: Coupon not applicable.
* 4. Wrong coupon code.*/
if (dt.Rows.Count > 0)
{
DataRow row = dt.Rows[0];
/*Coupon types
* 1. Normal coupon: Used 1 per user.
* 2. First time coupon: Used only for first order.
*/
Coupon coupon = new Coupon
{
CouponID = Convert.ToString(row["CouponID"]),
CouponCode = Convert.ToString(row["CouponCode"]),
CouponType = Convert.ToInt32(row["CouponTYpe"]),
Amount = Math.Round(Convert.ToDecimal(row["Amount"]), 2)
};
if (coupon.CouponType == 1) //Normal coupon.
{
//Check if the coupon has been already used by the user.
bool isValid = objDAL.CheckCouponCode(coupon.CouponID, userID);
if (isValid)
{
return(1);
}
else
{
return(1);
}
}
else if (coupon.CouponType == 2) //First time coupon
{
//Check if the user is ordering for the first time.
bool isValid = objDAL.CheckOrder(userID);
if (isValid)
{
return(1);
}
else
{
return(3);
}
}
}
else
{
return(4);
}
return(0);
}