/// <summary>
/// Creates output string based on customer order. Stops string construction when any errors found.
/// </summary>
/// <param name="menu">User selected menu</param>
/// <param name="customerOrder">User selected dishes</param>
private void SetResult(Menu menu, List<Dish> customerOrder = null)
{
var output = "";
if (menu.HasError)
{
Result = menu.ErrorMessage;
return;
}
if (customerOrder == null || !customerOrder.Any())
{
Result = "error";
return;
}
foreach (var dish in customerOrder.OrderBy(d => d.Priority))
{
var multiple = "";
if (dish.QuantityOrdered > 1)
{
multiple = string.Format("(x{0})", dish.QuantityOrdered);
}
output += string.Format("{0}{1}, {2}", dish.Name, multiple, dish.ErrorMessage);
if (dish.HasError)
{
break;
}
}
Result = string.Format("{0}", output.Trim().TrimEnd(','));
}
/// <summary>
/// Hardcoded list of dishes for each menu type
/// </summary>
private void PopulateMenus()
{
var morningMenu = new Menu { Name = "morning", Type = MenuType.Morning};
morningMenu.Dishes.Add(new Dish { Name = "eggs", Value = "1", Type = DishType.Entrée, Priority = 1, IsMultipleAllowed = false});
morningMenu.Dishes.Add(new Dish { Name = "toast", Value = "2", Type = DishType.Side, Priority = 2, IsMultipleAllowed = false });
morningMenu.Dishes.Add(new Dish { Name = "coffee", Value = "3", Type = DishType.Drink, Priority = 3, IsMultipleAllowed = true });
Menus.Add(morningMenu);
var nightMenu = new Menu { Name = "night", Type = MenuType.Night };
nightMenu.Dishes.Add(new Dish { Name = "steak", Value = "1", Type = DishType.Entrée, Priority = 1, IsMultipleAllowed = false });
nightMenu.Dishes.Add(new Dish { Name = "potato", Value = "2", Type = DishType.Side, Priority = 2, IsMultipleAllowed = true });
nightMenu.Dishes.Add(new Dish { Name = "wine", Value = "3", Type = DishType.Drink, Priority = 3, IsMultipleAllowed = false });
nightMenu.Dishes.Add(new Dish { Name = "cake", Value = "4", Type = DishType.Desert, Priority = 4, IsMultipleAllowed = false });
Menus.Add(nightMenu);
}
/// <summary>
/// Creates customer order based on user inputs and enforces quantity and availability rules
/// </summary>
/// <param name="args">list of command line arguments</param>
private void TakeOrder(string[] args)
{
var _menuService = new MenuService();
Menu selectedMenu = null;
var customerOrder = new List<Dish>();
args = ParseArgs(args);
if (args.Any())
{
selectedMenu = _menuService.Menus.FirstOrDefault(m => m.Name == args[0]);
if (selectedMenu == null)
{
selectedMenu = new Menu {HasError = true, ErrorMessage = "error"};
SetResult(selectedMenu);
return;
}
Dish selectedDish;
for (int i = 1; i < args.Count(); i++)
{
selectedDish = selectedMenu.Dishes.FirstOrDefault(d => d.Value == args[i]);
if (selectedDish == null)
{
selectedDish = customerOrder.Last();
selectedDish.HasError = true;
selectedDish.ErrorMessage = "error";
break;
}
if (selectedDish.QuantityOrdered == 0)
{
selectedDish.QuantityOrdered++;
customerOrder.Add(selectedDish);
}
else if (selectedDish.IsMultipleAllowed)
{
selectedDish.QuantityOrdered++;
}
else
{
selectedDish.HasError = true;
selectedDish.ErrorMessage = "error";
}
}
}
else
{
selectedMenu = new Menu {HasError = true, ErrorMessage = "error"};
}
SetResult(selectedMenu, customerOrder);
}