/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userPath = request.getServletPath();
HttpSession session = request.getSession();
Category selectedCategory;
Collection<Product> categoryProducts;
// if category page is requested
if (userPath.equals("/category")) {
// get categoryId from request
String categoryId = request.getQueryString();
if (categoryId != null) {
// get selected category
selectedCategory = categoryFacade.find(Short.parseShort(categoryId));
// place selected category in session scope
session.setAttribute("selectedCategory", selectedCategory);
// get all products for selected category
categoryProducts = selectedCategory.getProductCollection();
// place category products in session scope
session.setAttribute("categoryProducts", categoryProducts);
}
// if cart page is requested
} else if (userPath.equals("/viewCart")) {
String clear = request.getParameter("clear");
if ((clear != null) && clear.equals("true")) {
ShoppingCart cart = (ShoppingCart) session.getAttribute("cart");
cart.clear();
}
userPath = "/cart";
// if checkout page is requested
} else if (userPath.equals("/checkout")) {
ShoppingCart cart = (ShoppingCart) session.getAttribute("cart");
// calculate total
cart.calculateTotal(surcharge);
// forward to checkout page and switch to a secure channel
// if user switches language
} else if (userPath.equals("/chooseLanguage")) {
// get language choice
String language = request.getParameter("language");
// place in request scope
request.setAttribute("language", language);
String userView = (String) session.getAttribute("view");
if ((userView != null)
&& (!userView.equals("/index"))) { // index.jsp exists outside 'view' folder
// so must be forwarded separately
userPath = userView;
} else {
// if previous view is index or cannot be determined, send user to welcome page
try {
request.getRequestDispatcher("/index.jsp").forward(request, response);
} catch (Exception ex) {
ex.printStackTrace();
}
return;
}
}
// use RequestDispatcher to forward request internally
String url = "/WEB-INF/view" + userPath + ".jsp";
try {
request.getRequestDispatcher(url).forward(request, response);
} catch (Exception ex) {
ex.printStackTrace();
}
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userPath = request.getServletPath();
HttpSession session = request.getSession();
ShoppingCart cart = (ShoppingCart) session.getAttribute("cart");
Validator validator = new Validator();
// if addToCart action is called
if (userPath.equals("/addToCart")) {
// if user is adding item to cart for first time
// create cart object and attach it to user session
if (cart == null) {
cart = new ShoppingCart();
session.setAttribute("cart", cart);
}
// get user input from request
String productId = request.getParameter("productId");
if (!productId.isEmpty()) {
Product product = productFacade.find(Integer.parseInt(productId));
cart.addItem(product);
}
userPath = "/category";
// if updateCart action is called
} else if (userPath.equals("/updateCart")) {
// get input from request
String productId = request.getParameter("productId");
String quantity = request.getParameter("quantity");
boolean invalidEntry = validator.validateQuantity(productId, quantity);
if (!invalidEntry) {
Product product = productFacade.find(Integer.parseInt(productId));
cart.update(product, quantity);
}
userPath = "/cart";
// if purchase action is called
} else if (userPath.equals("/purchase")) {
if (cart != null) {
// extract user data from request
String name = request.getParameter("name");
String email = request.getParameter("email");
String phone = request.getParameter("phone");
String address = request.getParameter("address");
String cityRegion = request.getParameter("cityRegion");
String ccNumber = request.getParameter("creditcard");
// validate user data
boolean validationErrorFlag = false;
validationErrorFlag =
validator.validateForm(name, email, phone, address, cityRegion, ccNumber, request);
// if validation error found, return user to checkout
if (validationErrorFlag == true) {
request.setAttribute("validationErrorFlag", validationErrorFlag);
userPath = "/checkout";
// otherwise, save order to database
} else {
int orderId =
orderManager.placeOrder(name, email, phone, address, cityRegion, ccNumber, cart);
// if order processed successfully send user to confirmation page
if (orderId != 0) {
// in case language was set using toggle, get language choice before destroying session
Locale locale =
(Locale) session.getAttribute("javax.servlet.jsp.jstl.fmt.locale.session");
String language = "";
if (locale != null) {
language = (String) locale.getLanguage();
}
// dissociate shopping cart from session
cart = null;
// end session
session.invalidate();
if (!language.isEmpty()) { // if user changed language using the toggle,
// reset the language attribute - otherwise
request.setAttribute(
"language", language); // language will be switched on confirmation page!
}
// get order details
Map orderMap = orderManager.getOrderDetails(orderId);
// place order details in request scope
request.setAttribute("customer", orderMap.get("customer"));
request.setAttribute("products", orderMap.get("products"));
request.setAttribute("orderRecord", orderMap.get("orderRecord"));
request.setAttribute("orderedProducts", orderMap.get("orderedProducts"));
userPath = "/confirmation";
// otherwise, send back to checkout page and display error
} else {
userPath = "/checkout";
request.setAttribute("orderFailureFlag", true);
}
}
}
}
// use RequestDispatcher to forward request internally
String url = "/WEB-INF/view" + userPath + ".jsp";
try {
request.getRequestDispatcher(url).forward(request, response);
} catch (Exception ex) {
ex.printStackTrace();
}
}
