/// <summary> Adds book to Customer's ShoppingCart or increases book's count by 1.</summary>
/// <param name="customer">Customer object for custId from command.</param>
/// <param name="book">Book object for BookId from command.</param>
/// <exception cref="System.Exception">Throws when customer or book doesn't exist.</exception>
internal void AddBook(Customer customer, Book book)
{
if(customer == null || book == null)
throw new Exception("Customer or Book doesn't exist.");
ShoppingCart cart = customer.ShoppingCart;
ShoppingCartItem cItem = cart.Items.Find(itm => itm.BookId == book.Id);
if(cItem != null)
cItem.Count++;
else
cart.Items.Add(new ShoppingCartItem {
BookId = book.Id,
Count = 1
});
view.ShowShoppingCart(customer, model);
}
/// <summary> Shows HTML source for Shopping Cart of one customer. (In table with price calculation) </summary>
/// <param name="customer">Customer object.</param>
/// <param name="model">Model object. (For getting book details) </param>
public void ShowShoppingCart(Customer customer, ModelStore model)
{
var cartCount = customer.ShoppingCart.Items.Count;
PrintHeadAndMenu(customer.FirstName, cartCount);
if(cartCount == 0) // Special output case when cart is empty
stdOut.WriteLine(" Your shopping cart is EMPTY.");
else {
stdOut.WriteLine(" Your shopping cart:");
stdOut.WriteLine(" <table>");
stdOut.WriteLine(" <tr>");
stdOut.WriteLine(" <th>Title</th>");
stdOut.WriteLine(" <th>Count</th>");
stdOut.WriteLine(" <th>Price</th>");
stdOut.WriteLine(" <th>Actions</th>");
stdOut.WriteLine(" </tr>");
decimal totalPrice = 0;
foreach(var item in customer.ShoppingCart.Items) {
var book = model.GetBook(item.BookId);
var bookTotalPrice = item.Count * book.Price;
totalPrice += bookTotalPrice;
stdOut.WriteLine(" <tr>");
stdOut.WriteLine(" <td><a href=\"/Books/Detail/" + item.BookId + "\">" + book.Title + "</a></td>");
stdOut.WriteLine(" <td>" + item.Count + "</td>");
if(item.Count == 1)
stdOut.WriteLine(" <td>" + bookTotalPrice + " EUR</td>");
else
stdOut.WriteLine(" <td>" + item.Count + " * " + book.Price + " = " + bookTotalPrice + " EUR</td>");
stdOut.WriteLine(" <td><<a href=\"/ShoppingCart/Remove/" + item.BookId + "\">Remove</a>></td>");
stdOut.WriteLine(" </tr>");
}
stdOut.WriteLine(" </table>");
stdOut.WriteLine(" Total price of all items: " + totalPrice + " EUR");
}
stdOut.WriteLine("</body>");
stdOut.WriteLine("</html>");
PrintCmdEnd();
}
/// <summary> Shows HTML source for one book detail. </summary>
/// <param name="item">Book object from model.</param>
/// <param name="customer">Customer object.</param>
public void ShowBookDetail(Book item, Customer customer)
{
PrintHeadAndMenu(customer.FirstName, customer.ShoppingCart.Items.Count);
stdOut.WriteLine(" Book details:");
stdOut.WriteLine(" <h2>" + item.Title + "</h2>");
stdOut.WriteLine(" <p style=\"margin-left: 20px\">");
stdOut.WriteLine(" Author: " + item.Author + "<br />");
stdOut.WriteLine(" Price: " + item.Price + " EUR<br />");
stdOut.WriteLine(" </p>");
stdOut.WriteLine(" <h3><<a href=\"/ShoppingCart/Add/" + item.Id + "\">Buy this book</a>></h3>");
stdOut.WriteLine("</body>");
stdOut.WriteLine("</html>");
PrintCmdEnd();
}
/// <summary> Shows HTML source for list of books. (In table where there are max 3 books in row) </summary>
/// <param name="items">List of books from model.</param>
/// <param name="customer">Customer object.</param>
public void ShowBooks(IList<Book> items, Customer customer)
{
PrintHeadAndMenu(customer.FirstName, customer.ShoppingCart.Items.Count);
stdOut.WriteLine(" Our books for you:");
stdOut.WriteLine(" <table>");
var index = 0;
var booksLeft = items.Count;
while(booksLeft > 0) {
stdOut.WriteLine(" <tr>");
var columns = Math.Min(3, booksLeft); //This calculates how much items will be displayed in next row
for(int i = 0; i < columns; i++) {
var book = items[index++];
stdOut.WriteLine(" <td style=\"padding: 10px;\">");
stdOut.WriteLine(" <a href=\"/Books/Detail/" + book.Id + "\">" + book.Title + "</a><br />");
stdOut.WriteLine(" Author: " + book.Author + "<br />");
stdOut.WriteLine(" Price: " + book.Price + " EUR <<a href=\"/ShoppingCart/Add/" + book.Id + "\">Buy</a>>");
stdOut.WriteLine(" </td>");
}
booksLeft -= columns;
stdOut.WriteLine(" </tr>");
}
stdOut.WriteLine(" </table>");
stdOut.WriteLine("</body>");
stdOut.WriteLine("</html>");
PrintCmdEnd();
}
/// <summary> Removes book from Customer's ShoppingCart or decreases book's count by 1. </summary>
/// <param name="customer">Customer object for custId from command.</param>
/// <param name="book">Book object for BookId from command.</param>
/// <exception cref="System.Exception">Throws when Book isn't in Customer's ShoppingCart.</exception>
/// <exception cref="System.Exception">
/// Throws when Book isn't in Customer's ShoppingCart or when customer or book doesn't exist.
/// </exception>
internal void RemoveBook(Customer customer, Book book)
{
if(customer == null || book == null)
throw new Exception("Customer or Book doesn't exist.");
ShoppingCart cart = customer.ShoppingCart;
ShoppingCartItem cItem = cart.Items.Find(itm => itm.BookId == book.Id);
if(cItem == null)
throw new Exception("Book doesn't exist in Customers ShoppingCart.");
if(cItem.Count > 1)
cItem.Count--;
else
cart.Items.Remove(cItem);
view.ShowShoppingCart(customer, model);
}
