/// <summary> Parses one command and makes action or shows view. </summary>
/// <param name="line">One command as string.</param>
/// <exception cref="System.Exception">Throws when command is not correct by definition.</exception>
internal void ProcessCommand(string line)
{
string[] tokens = line.Split(' ');
if (tokens.Length != 3)
{
throw new Exception("Command length wrong.");
}
if (tokens[0] != "GET")
{
throw new Exception("Not a GET request.");
}
if (tokens[2].Substring(0, domain.Length) != domain)
{
throw new Exception("Wrong domain.");
}
Customer customer;
if ((customer = model.GetCustomer(int.Parse(tokens[1]))) == null)
{
throw new Exception("Customer doesn't exists.");
}
string[] cmds = tokens[2].
Substring(domain.Length).
Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
if (cmds.Length == 0)
{
throw new Exception("HTTP address is too short.");
}
switch (cmds[0])
{
case "Books":
if (cmds.Length == 1)
{
view.ShowBooks(model.GetBooks(), customer);
}
else if (cmds.Length == 3 && cmds[1] == "Detail")
{
Book detail = model.GetBook(int.Parse(cmds[2]));
if (detail == null)
{
throw new Exception("Book Detail not found.");
}
view.ShowBookDetail(detail, customer);
}
else
{
throw new Exception("Books HTTP address is wrong.");
}
break;
case "ShoppingCart":
if (cmds.Length == 1)
{
view.ShowShoppingCart(customer, model);
}
else if (cmds.Length == 3)
{
switch (cmds[1])
{
case "Add":
AddBook(customer, model.GetBook(int.Parse(cmds[2])));
break;
case "Remove":
RemoveBook(customer, model.GetBook(int.Parse(cmds[2])));
break;
default:
throw new Exception("ShoppingCart HTTP address is wrong.");
}
}
else
{
throw new Exception("ShoppingCart HTTP address is wrong.");
}
break;
default:
throw new Exception("HTTP address is wrong.");
}
}
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":
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 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":
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;
}