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":
store.books.Add(new Book {
Id = int.Parse(tokens[1]), Title = tokens[2], Author = tokens[3], Price = int.Parse(tokens[4])
});
break;
case "CUSTOMER":
store.customers.Add(new Customer {
Id = int.Parse(tokens[1]), FirstName = tokens[2], LastName = tokens[3]
});
break;
case "CART-ITEM":
var customer = store.GetCustomer(int.Parse(tokens[1]));
if (customer == null)
{
return(null);
}
customer.ShoppingCart.Items.Add(new ShoppingCartItem {
BookId = int.Parse(tokens[2]), Count = int.Parse(tokens[3])
});
break;
default:
return(null);
}
}
} catch (Exception ex) {
if (ex is FormatException || ex is IndexOutOfRangeException)
{
return(null);
}
throw;
}
return(store);
}
public void ProcessRequest(string request)
{
if (_parser.GetRequestType(request) != "GET")
{
_view.ShowInvalidRequest();
return;
}
int custID = _parser.GetCustID(request);
Customer cust = _model.GetCustomer(custID);
if (cust == null)
{
_view.ShowInvalidRequest();
return;
}
string command = _parser.GetCommand(request);
if (command == null)
{
_view.ShowInvalidRequest();
return;
}
if (command == "Books")
{
_view.ShowAllBooks(cust);
}
else if (command == "ShoppingCart")
{
_view.ShowShoppingCart(cust);
}
else
{
int bookID = _parser.GetBookID(command);
Book book = _model.GetBook(bookID);
if (book == null)
{
_view.ShowInvalidRequest();
return;
}
if (command.Contains("Books/Detail/"))
{
_view.ShowBookDetail(cust, book);
}
else if (command.Contains("ShoppingCart/Add/"))
{
AddBookToCart(cust, bookID);
}
else if (command.Contains("ShoppingCart/Remove/"))
{
RemoveBookFromCart(cust, bookID);
}
else
{
_view.ShowInvalidRequest();
}
}
}
