protected override void Trade(ITradeInventory shop, ITradeInventory customer, ITradeableItem item, int desiredQuantity, float unitPrice)
{
int availableQuantity = 0;
if (shop.Items.Contains(item.InventoryItem))//Only do the trade if the item is in the shop's inventory
{
//1. Get the actual available qunatity
if (item.InventoryItem.Stock >= desiredQuantity)
{
availableQuantity = desiredQuantity;
}
else
{
availableQuantity = item.InventoryItem.Stock;
}
//2. From the qunatity available, get the amount the buyer can carry
int quantityBuyerCanCarry = customer.QuantityCanAdd(item.InventoryItem, availableQuantity);
float totalBuyPrice = unitPrice * quantityBuyerCanCarry;
int quantityBuyerCanAfford = 0;
//3. From the amount the buyer can carry, get the amount the buyer can afford
if (customer.Currency >= totalBuyPrice)
{
quantityBuyerCanAfford = quantityBuyerCanCarry;
}
else
{
quantityBuyerCanAfford = (int)(customer.Currency / unitPrice);
if (customer.Currency <= 0)
{
quantityBuyerCanAfford = 0;
}
}
float actualBuyPrice = unitPrice * quantityBuyerCanAfford;
if (customer.Currency >= actualBuyPrice && quantityBuyerCanCarry > 0)
{
customer.Currency -= actualBuyPrice;
shop.Currency += actualBuyPrice;
InventoryItem buyerItem = item.InventoryItem.SplitStack(quantityBuyerCanAfford);
customer.AddItem(buyerItem);
}
}
}
