test

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package servlets;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.ArrayList;
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import java.util.List;
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import javax.servlet.RequestDispatcher;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import com.bittercode.constant.BookStoreConstants;
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import com.bittercode.model.Book;
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import com.bittercode.model.Cart;
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import com.bittercode.model.UserRole;
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import com.bittercode.service.BookService;
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import com.bittercode.service.impl.BookServiceImpl;
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import com.bittercode.util.StoreUtil;
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public class CartServlet extends HttpServlet {
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    BookService bookService = new BookServiceImpl();
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    public void service(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {
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        PrintWriter pw = res.getWriter();
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        res.setContentType(BookStoreConstants.CONTENT_TYPE_TEXT_HTML);
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        // Check if Customer is logged In
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        if (!StoreUtil.isLoggedIn(UserRole.CUSTOMER, req.getSession())) {
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            RequestDispatcher rd = req.getRequestDispatcher("CustomerLogin.html");
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            rd.include(req, res);
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            pw.println("<table class=\"tab\"><tr><td>Please Login First to Continue!!</td></tr></table>");
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            return;
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        }
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        try {
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            // Add/Remove Item from the cart if requested
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            // store the comma separated bookIds of cart in the session
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            StoreUtil.updateCartItems(req);
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            HttpSession session = req.getSession();
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            String bookIds = "";
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            if (session.getAttribute("items") != null)
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                bookIds = (String) session.getAttribute("items");// read comma separated bookIds from session
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            RequestDispatcher rd = req.getRequestDispatcher("CustomerHome.html");
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            rd.include(req, res);
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            // Set the active tab as cart
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            StoreUtil.setActiveTab(pw, "cart");
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            // Read the books from the database with the respective bookIds
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            List<Book> books = bookService.getBooksByCommaSeperatedBookIds(bookIds);
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            List<Cart> cartItems = new ArrayList<Cart>();
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            pw.println("<div id='topmid' style='background-color:grey'>Shopping Cart</div>");
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            pw.println("<table class=\"table table-hover\" style='background-color:white'>\r\n"
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                    + "  <thead>\r\n"
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                    + "    <tr style='background-color:black; color:white;'>\r\n"
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                    + "      <th scope=\"col\">BookId</th>\r\n"
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                    + "      <th scope=\"col\">Name</th>\r\n"
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                    + "      <th scope=\"col\">Author</th>\r\n"
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                    + "      <th scope=\"col\">Price/Item</th>\r\n"
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                    + "      <th scope=\"col\">Quantity</th>\r\n"
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                    + "      <th scope=\"col\">Amount</th>\r\n"
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                    + "    </tr>\r\n"
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                    + "  </thead>\r\n"
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                    + "  <tbody>\r\n");
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            double amountToPay = 0;
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            if (books == null || books.size() == 0) {
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                pw.println("    <tr style='background-color:green'>\r\n"
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                        + "      <th scope=\"row\" colspan='6' style='color:yellow; text-align:center;'> No Items In the Cart </th>\r\n"
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                        + "    </tr>\r\n");
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            }
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            for (Book book : books) {
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                int qty = (int) session.getAttribute("qty_" + book.getBarcode());
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                Cart cart = new Cart(book, qty);
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                cartItems.add(cart);
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                amountToPay += (qty * book.getPrice());
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                pw.println(getRowData(cart));
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            }
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            // set cartItems and amountToPay in the session
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            session.setAttribute("cartItems", cartItems);
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            session.setAttribute("amountToPay", amountToPay);
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            if (amountToPay > 0) {
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                pw.println("    <tr style='background-color:green'>\r\n"
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                        + "      <th scope=\"row\" colspan='5' style='color:yellow; text-align:center;'> Total Amount To Pay </th>\r\n"
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                        + "      <td colspan='1' style='color:white; font-weight:bold'><span>&#8377;</span> "
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                        + amountToPay
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                        + "</td>\r\n"
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                        + "    </tr>\r\n");
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            }
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            pw.println("  </tbody>\r\n"
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                    + "</table>");
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            if (amountToPay > 0) {
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                pw.println("<div style='text-align:right; margin-right:20px;'>\r\n"
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                        + "<form action=\"checkout\" method=\"post\">"
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                        + "<input type='submit' class=\"btn btn-primary\" name='pay' value='Proceed to Pay &#8377; "
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                        + amountToPay + "'/></form>"
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                        + "    </div>");
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            }
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        } catch (Exception e) {
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            e.printStackTrace();
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        }
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    }
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    public String getRowData(Cart cart) {
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        Book book = cart.getBook();
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        return "    <tr>\r\n"
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                + "      <th scope=\"row\">" + book.getBarcode() + "</th>\r\n"
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                + "      <td>" + book.getName() + "</td>\r\n"
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                + "      <td>" + book.getAuthor() + "</td>\r\n"
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                + "      <td><span>&#8377;</span> " + book.getPrice() + "</td>\r\n"
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                + "      <td><form method='post' action='cart'><button type='submit' name='removeFromCart' class=\"glyphicon glyphicon-minus btn btn-danger\"></button> "
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                + "<input type='hidden' name='selectedBookId' value='" + book.getBarcode() + "'/>"
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                + cart.getQuantity()
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                + " <button type='submit' name='addToCart' class=\"glyphicon glyphicon-plus btn btn-success\"></button></form></td>\r\n"
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                + "      <td><span>&#8377;</span> " + (book.getPrice() * cart.getQuantity()) + "</td>\r\n"
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                + "    </tr>\r\n";
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    }
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}
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