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.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.model.Book;
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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 ViewBookServlet extends HttpServlet {
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    // book service for database operations and logics
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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("text/html");
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        // Check if the customer is logged in, or else return to login page
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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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            // Read All available books from the database
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            List<Book> books = bookService.getAllBooks();
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            // Default Page to load data into
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            RequestDispatcher rd = req.getRequestDispatcher("CustomerHome.html");
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            rd.include(req, res);
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            // Set Available Books tab as active
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            StoreUtil.setActiveTab(pw, "books");
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            // Show the heading for the page
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            pw.println("<div id='topmid' style='background-color:grey'>Available Books"
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                    + "<form action=\"cart\" method=\"post\" style='float:right; margin-right:20px'>"
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                    + "<input type='submit' class=\"btn btn-primary\" name='cart' value='Proceed'/></form>"
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                    + "</div>");
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            pw.println("<div class=\"container\">\r\n"
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                    + "        <div class=\"card-columns\">");
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            // Add or Remove items from the cart, if requested
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            StoreUtil.updateCartItems(req);
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            HttpSession session = req.getSession();
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            for (Book book : books) {
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                // Add each book to display as a card
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                pw.println(this.addBookToCard(session, book));
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            }
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            // Checkout Button
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            pw.println("</div>"
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                    + "<div style='float:auto'><form action=\"cart\" method=\"post\">"
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                    + "<input type='submit' class=\"btn btn-success\" name='cart' value='Proceed to Checkout'/></form>"
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                    + "    </div>");
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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 addBookToCard(HttpSession session, Book book) {
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        String bCode = book.getBarcode();
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        int bQty = book.getQuantity();
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        // Quantity of the current book added to the cart
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        int cartItemQty = 0;
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        if (session.getAttribute("qty_" + bCode) != null) {
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            // Quantity of each book in the cart will be added in the session prefixed with
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            // 'qty_' following with bookId
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            cartItemQty = (int) session.getAttribute("qty_" + bCode);
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        }
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        // Button To Add/Remove item from the cart
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        String button = "";
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        if (bQty > 0) {
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            // If no items in the cart, show add to cart button
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            // If items is added to the cart, then show +, - button to add/remove more items
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            button = "<form action=\"viewbook\" method=\"post\">"
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                    + "<input type='hidden' name = 'selectedBookId' value = " + bCode + ">"
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                    + "<input type='hidden' name='qty_" + bCode + "' value='1'/>"
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                    + (cartItemQty == 0
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                            ? "<input type='submit' class=\"btn btn-primary\" name='addToCart' value='Add To Cart'/></form>"
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                            : "<form method='post' action='cart'>"
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                                    + "<button type='submit' name='removeFromCart' class=\"glyphicon glyphicon-minus btn btn-danger\"></button> "
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                                    + "<input type='hidden' name='selectedBookId' value='" + bCode + "'/>"
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                                    + cartItemQty
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                                    + " <button type='submit' name='addToCart' class=\"glyphicon glyphicon-plus btn btn-success\"></button></form>")
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                    + "";
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        } else {
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            // If available Quantity is zero, show out of stock button
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            button = "<p class=\"btn btn-danger\">Out Of Stock</p>\r\n";
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        }
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        // Bootstrap card to show the book data
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        return "<div class=\"card\">\r\n"
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                + "                <div class=\"row card-body\">\r\n"
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                + "                    <img class=\"col-sm-6\" src=\"logo.png\" alt=\"Card image cap\">\r\n"
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                + "                    <div class=\"col-sm-6\">\r\n"
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                + "                        <h5 class=\"card-title text-success\">" + book.getName() + "</h5>\r\n"
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                + "                        <p class=\"card-text\">\r\n"
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                + "                        Author: <span class=\"text-primary\" style=\"font-weight:bold;\"> "
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                + book.getAuthor()
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                + "</span><br>\r\n"
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                + "                        </p>\r\n"
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                + "                        \r\n"
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                + "                    </div>\r\n"
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                + "                </div>\r\n"
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                + "                <div class=\"row card-body\">\r\n"
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                + "                    <div class=\"col-sm-6\">\r\n"
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                + "                        <p class=\"card-text\">\r\n"
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                + "                        <span>Id: " + bCode + "</span>\r\n"
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                + (bQty < 20 ? "<br><span class=\"text-danger\">Only " + bQty + " items left</span>\r\n"
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                        : "<br><span class=\"text-success\">Trending</span>\r\n")
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                + "                        </p>\r\n"
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                + "                    </div>\r\n"
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                + "                    <div class=\"col-sm-6\">\r\n"
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                + "                        <p class=\"card-text\">\r\n"
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                + "                        Price: <span style=\"font-weight:bold; color:green\"> &#8377; "
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                + book.getPrice()
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                + " </span>\r\n"
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                + "                        </p>\r\n"
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                + button
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                + "                    </div>\r\n"
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                + "                </div>\r\n"
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                + "            </div>";
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    }
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}
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