public Controller(ModelStore modelStore, PagePrinter pagePrinter)
{
this.modelStore = modelStore;
this.pagePrinter = pagePrinter;
}
private static void InitModelStore()
{
modelStore = ModelStore.LoadFrom(Console.In);
}
public static ModelStore LoadFrom(TextReader reader)
{
var store = new ModelStore();
try
{
if (reader.ReadLine() != "DATA-BEGIN")
{
return(null);
}
while (true)
{
string line = reader.ReadLine();
if (line == null)
{
return(null);
}
else if (line == "DATA-END")
{
break;
}
string[] tokens = line.Split(';');
switch (tokens[0])
{
case "BOOK":
{
int id = int.Parse(tokens[1]);
string title = tokens[2];
string author = tokens[3];
decimal price = decimal.Parse(tokens[4]);
if ((id < 0) || (price < 0))
{
return(null);
}
store.books.Add(new Book
{
Id = id,
Title = title,
Author = author,
Price = price
});
}
break;
case "CUSTOMER":
{
int id = int.Parse(tokens[1]);
if (id < 0)
{
return(null);
}
store.customers.Add(new Customer
{
Id = id,
FirstName = tokens[2],
LastName = tokens[3]
});
}
break;
case "CART-ITEM":
var customer = store.GetCustomer(int.Parse(tokens[1]));
int bookId = int.Parse(tokens[2]);
int count = int.Parse(tokens[3]);
var book = store.GetBook(bookId);
if (customer == null || book == null || count < 1)
{
return(null);
}
customer.ShoppingCart.Items.Add(new ShoppingCartItem
{
BookId = bookId,
Count = count
});
break;
default:
return(null);
}
}
}
catch (Exception ex)
{
if (ex is FormatException || ex is IndexOutOfRangeException)
{
return(null);
}
throw;
}
return(store);
}
public PagePrinter(ModelStore modelStore)
{
this.modelStore = modelStore;
}