/// <summary>
/// manages adding a POSItem to an order. If the POSItem already exists, the quantity is just incremented
/// </summary>
/// <param name="i"></param>
/// <param name="quantity"></param>
/// <returns>The POSLineItem for the POSItem. Will either return a new one, or an existing with its quantity incremented</returns>
/// <summary>
/// Adds the item.
/// </summary>
/// <param name="i">The i.</param>
/// <param name="quantity">The quantity.</param>
/// <returns>POSLineItem.</returns>
public POSLineItem AddItem(POSItem i, int quantity)
{
bool exists = false;
POSLineItem targetItem = null;
foreach (POSLineItem lineI in Items)
{
if (lineI.Item.ID == i.ID)
{
exists = true;
lineI.Quantity += quantity;
targetItem = lineI;
break;
}
}
if (!exists)
{
POSLineItem li = new POSLineItem();
li.Quantity = quantity;
li.Item = i;
targetItem = li;
Items.Add(li);
}
onOrderChange(this, OrderChangeTarget.ITEM);
return(targetItem);
}
/// <summary>
/// Removes the item.
/// </summary>
/// <param name="selectedLineItem">The selected line item.</param>
internal void RemoveItem(POSLineItem selectedLineItem)
{
Items.Remove(selectedLineItem);
onOrderChange(this, OrderChangeTarget.ITEM);
}
/// <summary>
/// Adds the order line item.
/// </summary>
/// <param name="item">The item.</param>
public void AddOrderLineItem(POSLineItem item)
{
this.Items.Add(item);
onOrderChange(this, OrderChangeTarget.ITEM);
}