public static IState VoidAdjustedItem(Hashtable data)
{
/* when the cancel menu(key) selected with quantity
* search the sale list to find items
* whose product is equal to product to be cancel and
* whose remaing quantity is equal to at least quantity to be cancel and
* whose unit price has not been found yet in other words cancel menu does not contains the item with same unit price
* define the quantity and amount of item to be cancel and add the cancel menu
*/
IProduct adjustedPoduct = (IProduct)data["Product"];
Decimal quantity = (Decimal)data["Quantity"];
/* unitprices contains the information of how much item was sold with the corresponding unitprice
* when an item is added to cancel menu relating data is removed
* so no item with same price could be add to list
*/
System.Collections.Generic.Dictionary <decimal, decimal> unitprices
= (System.Collections.Generic.Dictionary <decimal, decimal>)data["UnitPrices"];
/* Cancel menu contains the items with
* quantity to be cancel
* item name
* unit price * quantity to be cancel
*/
MenuList cancelMenu = new MenuList();
foreach (FiscalItem fiscalItem in cr.Document.Items)
{
if (fiscalItem is SalesItem && fiscalItem.Product.Id == adjustedPoduct.Id && unitprices.ContainsKey(fiscalItem.UnitPrice))
{
if (unitprices[fiscalItem.UnitPrice] >= quantity)
{
SalesItem temp = (SalesItem)(fiscalItem.Clone());
temp.Quantity = quantity;
temp.TotalAmount = quantity * temp.UnitPrice;
temp.VoidAmount = 0;
temp.VoidQuantity = 0;
unitprices.Remove(fiscalItem.UnitPrice);
cancelMenu.Add(temp);
}
}
}
return(ListVoid.Instance(cancelMenu, new ProcessSelectedItem <FiscalItem>(VoidSelectedItem)));
}
public override void Enter()
{
/* when the cancel menu(key) selected without quantity
* create a list which contains the items whose remaining quantity is bigger than zero
*/
MenuList cancelMenu = new MenuList();
foreach (FiscalItem fiscalItem in cr.Document.Items)
{
if (fiscalItem is SalesItem)
{
VoidItem voidItem = new VoidItem(fiscalItem);
/* quantity of void item is equal to remaining quantity of sale item */
if (Math.Abs(voidItem.Quantity) > 0 && cr.Document.CanAddItem(voidItem))
{
cancelMenu.Add(fiscalItem);
}
}
}
cr.State = ListVoid.Instance(cancelMenu, new ProcessSelectedItem <FiscalItem>(VoidSelectedItem));
}