// compare the two arrays to see if there has been any change
// grab the members of the array that have changed and store them in a new array
// set the selected shipping method to the thing with the biggest difference in pricing
public ShippingMethod CompareShippingMethods(CartMock originalCart, CartMock newCart)
{
var largestDiscount = 0.00;
ShippingMethod mostDiscountedShippingMethod = null;
for (int i = 0; i < originalCart.ShippingMethods.Length; i++)
{
if ((originalCart.ShippingMethods[i].Amount - newCart.ShippingMethods[i].Amount) > largestDiscount)
{
largestDiscount = originalCart.ShippingMethods[i].Amount - newCart.ShippingMethods[i].Amount;
mostDiscountedShippingMethod = newCart.ShippingMethods[i];
}
}
return(mostDiscountedShippingMethod);
}
static void Main(string[] args)
{
var firstCart = new CartMock
{
ShippingMethods = new ShippingMethod[]
{
new ShippingMethod
{
Amount = 0,
Description = "Free Standard Shipping"
},
new ShippingMethod()
{
Amount = 14.99,
Description = "Expedited Shipping"
},
new ShippingMethod()
{
Amount = 19.99,
Description = "Next Business Day"
}
},
};
firstCart.SelectedShippingMethod = firstCart.ShippingMethods[0];
var secondCart = new CartMock
{
ShippingMethods = new ShippingMethod[]
{
new ShippingMethod
{
Amount = 0,
Description = "Free Standard Shipping"
},
new ShippingMethod()
{
Amount = 14.99,
Description = "Expedited Shipping"
},
//new ShippingMethod()
//{
// Amount = 19.99,
// Description = "Next Business Day"
//}
},
};
secondCart.SelectedShippingMethod = secondCart.ShippingMethods[0];
Console.WriteLine("The first cart's selected shipping method is " + firstCart.SelectedShippingMethod.Description);
Console.WriteLine("The second cart's selected shipping method is " + secondCart.SelectedShippingMethod.Description);
Console.WriteLine("==========================================================================");
Console.WriteLine("= After =");
Console.WriteLine("==========================================================================");
var comparer = new ArrayComparer();
var mostDiscountedMethod = comparer.CompareShippingMethods(firstCart, secondCart);
if (mostDiscountedMethod != null)
{
secondCart.SelectedShippingMethod = mostDiscountedMethod;
}
Console.WriteLine("The current second cart's selected shipping method is " + secondCart.SelectedShippingMethod.Description);
Console.ReadLine();
}