public override ITransaction ToTransaction(IBarcodeSystemManager barcodeSystemManager)
{
IUser user = barcodeSystemManager.GetUserByUsername(Username);
IProduct product = barcodeSystemManager.GetProductById(productId);
return(new BuyTransaction(Id, user, product, Date, count));
}
private void BuyProduct(string username, string productIdString, uint count)
{
if (!uint.TryParse(productIdString, out uint productId))
{
systemUI.DisplayProductNotFound(productIdString);
return;
}
if (count < 1)
{
systemUI.DisplayError($"Invalid product count: {count}.");
return;
}
try
{
IUser user = systemManager.GetUserByUsername(username);
IProduct product = systemManager.GetProductById(productId);
systemManager.BuyProduct(user, product, count);
systemUI.DisplayUserBuysProduct(user, product, count);
}
catch (Exception e)
{
systemUI.DisplayError(e.Message);
};
}
protected IProduct GetProduct(string productIdString, IBarcodeSystemUI systemUI, IBarcodeSystemManager systemManager)
{
if (!uint.TryParse(productIdString, out uint productId))
{
systemUI.DisplayProductNotFound(productIdString);
return(null);
}
return(systemManager.GetProductById(productId));
}
public void Execute(string[] args, IBarcodeSystemUI systemUI, IBarcodeSystemManager systemManager)
{
uint productId = uint.Parse(args[0]);
product = systemManager.GetProductById(productId);
if (canBeBoughtOnCredit == product.CanBeBoughtOnCredit)
{
output = canBeBoughtOnCredit
? $"Product {product.Name} can already be bought on credit!"
: $"Product {product.Name} already cannot be bought on credit!";
}
else
{
output = canBeBoughtOnCredit
? $"Product {product.Name} can now be bought on credit."
: $"Product {product.Name} can no longer be bought on credit.";
product.CanBeBoughtOnCredit = canBeBoughtOnCredit;
}
}