internal static BookingBill GetBookingBill(IEnumerable<RestaurantMenuItem> restaurantMenuItems, IEnumerable<RestaurantTable> restaurantTables, SeasonalOffer restaurantOffer, Coupon restaurantcoupon, int bookedslots)
{
var discountamt = 0M;
decimal grossamount = restaurantTables.Sum(restaurantTable => restaurantTable.Price * bookedslots);
grossamount = restaurantMenuItems.Aggregate(grossamount, (current, restaurantMenuItem) => (int)(current + restaurantMenuItem.Price));
var offer = (restaurantcoupon as OfferBase) ?? (restaurantOffer);
var netamount = grossamount;
if (offer != null)
{
switch (offer.Type)
{
case OfferBase.OfferType.DiscountAmount:
{
discountamt = offer.Value;
netamount = grossamount - discountamt;
if (netamount < 0) netamount = 0;
break;
}
case OfferBase.OfferType.DiscountPercent:
{
discountamt = (grossamount * offer.Value) / 100M;
netamount = grossamount - discountamt;
break;
}
case OfferBase.OfferType.FreeServing:
{
discountamt = new RestaurantMenuItemRepository().Find(offer.Value).Price;
netamount = grossamount - discountamt;
break;
}
}
}
if (netamount < 0)
throw new InvalidOperationException("Discount amount cannot be more than the total amount of the Bill");
return new BookingBill
{
DiscountAmount = discountamt,
GrossAmount = grossamount,
NetAmount = netamount
};
}
internal static void ValidateModel(Controller controller, BookingViewModel model, int? offerid, string couponcode, out IEnumerable<RestaurantMenuItem> restaurantMenuItems,
out IEnumerable<RestaurantTable> restaurantTables, out SeasonalOffer restaurantOffer, out Coupon restaurantCoupon)
{
ValidateModel(controller, model, offerid, out restaurantMenuItems, out restaurantTables, out restaurantOffer);
restaurantCoupon = null;
if (couponcode.IsNullOrEmpty()) return;
var result = new OfferBaseRepository().FindCouponByCode(couponcode.Trim());
if (result != null)
{
if (result.ValidTill.ToUniversalTime() > DateTime.UtcNow)
{
restaurantCoupon = result;
return;
}
controller.ModelState.AddModelError("addstatus", "Coupon Code has expired !");
return;
}
controller.ModelState.AddModelError("addstatus", "Invalid Coupon code provided.");
}