/// <summary>
/// Clears the memmory.
/// </summary>
public void DisposeStore()
{
this.Nezarka = null;
}
/// <summary>
/// Parse INPUT data and create new ModelStore object.
/// </summary>
/// <param name="wrongInput">Flag signaling weather the INPUT was correct or not.</param>
public void GetData(TextReader dataReader, out bool wrongInput)
{
wrongInput = default(bool);
this.Nezarka = ModelStore.LoadFrom(dataReader, out wrongInput);
}
/// <summary>
/// Prints HTML containing list of all books the customer has.
/// </summary>
/// <param name="customer">Customer object from Nezarka's database.</param>
/// <param name="store">Nezarka it self. Used solely for it's database records.</param>
public void GetBooksHtml(Customer customer, ModelStore store)
{
IList <Book> books = store.GetBooks();
Writer.WriteLine("<!DOCTYPE html>");
Writer.WriteLine("<html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\">");
Writer.WriteLine("<head>");
Writer.WriteLine(" <meta charset=\"utf-8\" />");
Writer.WriteLine(" <title>Nezarka.net: Online Shopping for Books</title>");
Writer.WriteLine("</head>");
Writer.WriteLine("<body>");
Writer.WriteLine(" <style type=\"text/css\">");
Writer.WriteLine(" table, th, td {");
Writer.WriteLine(" border: 1px solid black;");
Writer.WriteLine(" border-collapse: collapse;");
Writer.WriteLine(" }");
Writer.WriteLine(" table {");
Writer.WriteLine(" margin-bottom: 10px;");
Writer.WriteLine(" }");
Writer.WriteLine(" pre {");
Writer.WriteLine(" line-height: 70%;");
Writer.WriteLine(" }");
Writer.WriteLine(" </style>");
Writer.WriteLine(" <h1><pre> v,<br />Nezarka.NET: Online Shopping for Books</pre></h1>");
Writer.WriteLine(" {0}, here is your menu:", customer.FirstName);
Writer.WriteLine(" <table>");
Writer.WriteLine(" <tr>");
Writer.WriteLine(" <td><a href=\"/Books\">Books</a></td>");
Writer.WriteLine($" <td><a href=\"/ShoppingCart\">Cart ({customer.ShoppingCart.Items.Count})</a></td>");
Writer.WriteLine(" </tr>");
Writer.WriteLine(" </table>");
Writer.WriteLine(" Our books for you:");
Writer.WriteLine(" <table>");
if (books.Count > 0)
{
Writer.WriteLine(" <tr>");
}
for (int i = 0; i < books.Count; i++)
{
if (i % 3 == 0 && i != 0)
{
Writer.WriteLine(" </tr>");
Writer.WriteLine(" <tr>");
}
Writer.WriteLine(" <td style=\"padding: 10px;\">");
Writer.WriteLine(" <a href=\"/Books/Detail/{0}\">{1}</a><br />", books[i].Id, books[i].Title);
Writer.WriteLine(" Author: {0}<br />", books[i].Author);
Writer.WriteLine(" Price: {0} EUR <<a href=\"/ShoppingCart/Add/{1}\">Buy</a>>", books[i].Price, books[i].Id);
Writer.WriteLine(" </td>");
}
if (books.Count > 0)
{
Writer.WriteLine(" </tr>");
}
Writer.WriteLine(" </table>");
Writer.WriteLine("</body>");
Writer.WriteLine("</html>");
Writer.Flush();
}
/// <summary>
/// Prints HTML of customers shoping cart.
/// </summary>
/// <param name="customer">Customer object from Nezarka's database.</param>
/// <param name="store">Nezarka it self. Used solely for it's database records.</param>
public void GetShopingCart(Customer customer, ModelStore store)
{
Writer.WriteLine("<!DOCTYPE html>");
Writer.WriteLine("<html lang=\"en\" xmlns=\"http://www.w3.org/1999/xhtml\">");
Writer.WriteLine("<head>");
Writer.WriteLine(" <meta charset=\"utf-8\" />");
Writer.WriteLine(" <title>Nezarka.net: Online Shopping for Books</title>");
Writer.WriteLine("</head>");
Writer.WriteLine("<body>");
Writer.WriteLine(" <style type=\"text/css\">");
Writer.WriteLine(" table, th, td {");
Writer.WriteLine(" border: 1px solid black;");
Writer.WriteLine(" border-collapse: collapse;");
Writer.WriteLine(" }");
Writer.WriteLine(" table {");
Writer.WriteLine(" margin-bottom: 10px;");
Writer.WriteLine(" }");
Writer.WriteLine(" pre {");
Writer.WriteLine(" line-height: 70%;");
Writer.WriteLine(" }");
Writer.WriteLine(" </style>");
Writer.WriteLine(" <h1><pre> v,<br />Nezarka.NET: Online Shopping for Books</pre></h1>");
Writer.WriteLine($" {customer.FirstName}, here is your menu:");
Writer.WriteLine(" <table>");
Writer.WriteLine(" <tr>");
Writer.WriteLine(" <td><a href=\"/Books\">Books</a></td>");
Writer.WriteLine($" <td><a href=\"/ShoppingCart\">Cart ({customer.ShoppingCart.Items.Count})</a></td>");
Writer.WriteLine(" </tr>");
Writer.WriteLine(" </table>");
if (customer.ShoppingCart.Items.Count == 0)
{
Writer.WriteLine(" Your shopping cart is EMPTY.");
}
else
{
Writer.WriteLine(" Your shopping cart:");
Writer.WriteLine(" <table>");
Writer.WriteLine(" <tr>");
Writer.WriteLine(" <th>Title</th>");
Writer.WriteLine(" <th>Count</th>");
Writer.WriteLine(" <th>Price</th>");
Writer.WriteLine(" <th>Actions</th>");
Writer.WriteLine(" </tr>");
decimal SUM = 0;
for (int i = 0; i < customer.ShoppingCart.Items.Count; i++)
{
Book b = store.GetBook(customer.ShoppingCart.Items[i].BookId);
Writer.WriteLine(" <tr>");
Writer.WriteLine($" <td><a href=\"/Books/Detail/{b.Id}\">{b.Title}</a></td>");
Writer.WriteLine($" <td>{customer.ShoppingCart.Items[ i ].Count}</td>");
if (customer.ShoppingCart.Items[i].Count > 1)
{
Writer.WriteLine($" <td>{customer.ShoppingCart.Items[ i ].Count} * {b.Price} = {customer.ShoppingCart.Items[ i ].Count * b.Price} EUR</td>");
}
else
{
Writer.WriteLine($" <td>{b.Price} EUR</td>");
}
SUM += (customer.ShoppingCart.Items[i].Count * b.Price);
Writer.WriteLine($" <td><<a href=\"/ShoppingCart/Remove/{b.Id}\">Remove</a>></td>");
Writer.WriteLine(" </tr>");
}
Writer.WriteLine(" </table>");
Writer.WriteLine($" Total price of all items: {SUM} EUR");
}
Writer.WriteLine("</body>");
Writer.WriteLine("</html>");
Writer.Flush();
}
/// <summary>
/// Parses input data to database friendly format an includes them in it.
/// If there is any error in the given data, process is aborted and empty object is returned.
/// </summary>
/// <param name="reader">Text reader. Must be set to read STDIN.</param>
/// <param name="wrongInput">Flag that carries information of error in data loading / parsing.</param>
/// <returns>Database object if the data were correct. NULL if they were not.</returns>
public static ModelStore LoadFrom(TextReader reader, out bool wrongInput)
{
var store = new ModelStore();
wrongInput = true;
try {
if (reader.ReadLine() != "DATA-BEGIN")
{
return(null);
}
while (true)
{
wrongInput = true;
string line = reader.ReadLine();
if (line == null)
{
return(null);
}
else if (line == "DATA-END")
{
wrongInput = false;
break;
}
string[] tokens = line.Split(';');
switch (tokens[0])
{
case "BOOK":
if (Book.TryParse(tokens, out Book book))
{
//is this book original?
if (store.GetBook(book.Id) == null)
{
store.books.Add(book);
wrongInput = false;
}
}
break;
case "CUSTOMER":
if (Customer.TryParse(tokens, out Customer customer))
{
//is this customer new?
if (store.GetCustomer(customer.Id) == null)
{
store.customers.Add(customer);
wrongInput = false;
}
}
break;
case "CART-ITEM":
if (ShoppingCartItem.TryParse(tokens, out ShoppingCartItem shoppingCartItem, out int userID))
{
//does this customer exist?
if (store.GetCustomer(userID) == null)
{
break;
}
//does the book exist?
if (store.GetBook(shoppingCartItem.BookId) == null)
{
break;
}
Customer existingCustomer = store.GetCustomer(userID);
existingCustomer.ShoppingCart.AddItem(shoppingCartItem);
wrongInput = false;
}
break;
default:
break;
}
if (wrongInput)
{
return(default(ModelStore));
}
}
} catch (Exception ex) {
if (ex is FormatException || ex is IndexOutOfRangeException)
{
return(null);
}
throw;
}
return(store);
}
