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 = decimal.Parse(tokens[4])
});
break;
case "CUSTOMER": {
var customer = new Customer {
Id = int.Parse(tokens[1]), FirstName = tokens[2], LastName = tokens[3], DateJoined = null
};
if (tokens.Length >= 6)
{
customer.DateJoined = new DateTime(int.Parse(tokens[4]), int.Parse(tokens[5]), int.Parse(tokens[6]));
}
store.customers.Add(customer);
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 ExecuteRequest(string request, TextWriter responseWriter)
{
IView view = InvalidRequestView.Instance;
try {
string[] tokens = request.Split(' ');
if (tokens[0] == "GET")
{
var customer = store.GetCustomer(int.Parse(tokens[1]));
if (customer != null && tokens[2].StartsWith(CommonRequestPrefix))
{
string[] verbs = tokens[2].Substring(CommonRequestPrefix.Length).Split('/');
if (verbs.Length <= 3)
{
string action = verbs.Length >= 2 ? verbs[1] : null;
int id = verbs.Length >= 3 ? int.Parse(verbs[2]) : 0;
switch (verbs[0])
{
case "Books":
view = booksController.HandleRequest(customer, action, id);
break;
case "ShoppingCart":
view = shoppingCartController.HandleRequest(customer, action, id);
break;
default:
view = null;
break;
}
if (view == null)
{
view = InvalidRequestView.Instance;
}
else
{
view = masterViewFactory.CreateView(
menuViewFactory.CreateView(customer),
view
);
}
}
}
}
} catch (Exception ex) {
if (ex is IndexOutOfRangeException || ex is FormatException || ex is ArgumentOutOfRangeException)
{
// Do nothing <- InvalidRequestView.Instance view is fine
}
else
{
throw;
}
}
view.RenderTo(responseWriter);
}
