/// <summary>
/// Processes the order and updates the inventory.
/// </summary>
/// <param name="order">order object to be fulfilled.</param>
/// <param name="costingMethod">Costing Method</param>
/// <returns>OrderInvoice object containing details of invoice of order</returns>
public OrderInvoice FulfillOrder(Order order, CostingMethod costingMethod)
{
int sharesToBeSold = order.NumberOfShares;
decimal totalCostPrice = 0m;
decimal inventoryCostPrice;
OrderInvoice orderInvoice = new OrderInvoice();
// throw error if there is not enough inventory to fulfill order
if (GetSharesCount() < order.NumberOfShares)
{
throw new InventoryException(String.Format("Cannot process order for {0} shares, only {1} shares left in Inventory!",
order.NumberOfShares, GetSharesCount()));
}
// Get costing class object based on the costing method selected, default is FIFO
costingService = CostingFactory.GetCostingService(costingMethod);
#region ProcessOrder
var inventoryItem = costingService.GetInventory(inventory, out inventoryCostPrice);
while (costingService.GetInventory(inventory, out inventoryCostPrice).SharesCount < sharesToBeSold)
{
totalCostPrice += inventoryItem.SharesCount * inventoryCostPrice;
sharesToBeSold -= inventoryItem.SharesCount;
inventory.RemoveAt(0);
}
inventoryItem = costingService.GetInventory(inventory, out inventoryCostPrice);
inventoryItem.SharesCount -= sharesToBeSold;
totalCostPrice += sharesToBeSold * inventoryCostPrice;
if (inventoryItem.SharesCount == 0)
{
inventory.RemoveAt(0);
}
#endregion
#region Create OrderInvoice
orderInvoice.CostPriceOfSoldShares = totalCostPrice / order.NumberOfShares;
orderInvoice.ProfitLoss = (order.Price * order.NumberOfShares) - totalCostPrice;
orderInvoice.RemainingShares = GetSharesCount();
orderInvoice.CostPriceOfRemainingShares = GetCostPrice();
#endregion
return(orderInvoice);
}
private void btnCalculate_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(errorProvider1.GetError(txtSharedSold)) &&
string.IsNullOrEmpty(errorProvider1.GetError(txtSalePrice)) // text fields validations
)
{
#region Read Input and Create Order
Order order = new Order();
order.NumberOfShares = Convert.ToInt32(txtSharedSold.Text);
order.Price = Convert.ToDecimal(txtSalePrice.Text);
order.SellDate = dtDateOfSale.Value;
CostingMethod costingMethod;
Enum.TryParse <CostingMethod>(cmbCostingMethod.SelectedValue.ToString(), out costingMethod);
#endregion
try
{
// Proess input
OrderInvoice orderInvoice = _inventoryService.FulfillOrder(order, costingMethod);
#region Show Order Invoice on Form
txtCostPriceOfRemainingShares.Text = orderInvoice.CostPriceOfRemainingShares.ToString();
txtCostPriceOfSharesSold.Text = orderInvoice.CostPriceOfSoldShares.ToString();
txtSharesRemaining.Text = orderInvoice.RemainingShares.ToString();
txtProfitLoss.Text = orderInvoice.ProfitLoss.ToString();
#endregion
}
catch (InventoryException ex)
{
MessageBox.Show(ex.Message, "Inventory Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Unhandled Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
throw;
}
}
}
