/**
* Add the selected items into cart.
*
* @param request The HttpServletRequest that contains the items to be added.
* @return The name of the JSP page that is to be directed to.
*/
public String add(HttpServletRequest request) {
Cart myCart = (Cart) request.getSession().getAttribute("cart");
HashMap<String, HashMap<StockType, LinkedList<Stock>>> itemsAlreadyInCart =
new HashMap<String, HashMap<StockType, LinkedList<Stock>>>();
String[] itemsToAdd = request.getParameterValues("addToCart");
if (itemsToAdd == null) {
request.setAttribute("cartSize", myCart.getCartSize());
return "cart.jsp";
}
for (String item : itemsToAdd) {
// if item is not in cart.
LinkedList<Stock> inCart = itemIsInCart(item, myCart.getItems());
if (inCart == null) {
System.out.println(item);
myCart.addToCart(getItem(item));
} else {
HashMap<StockType, LinkedList<Stock>> duplicated =
new HashMap<StockType, LinkedList<Stock>>();
duplicated.put(getItem(item).getType(), inCart);
itemsAlreadyInCart.put(item, duplicated);
}
}
request.setAttribute("cartSize", myCart.getCartSize());
request.setAttribute("totalCost", getTotal(myCart));
request.setAttribute("alreadyInCartSize", itemsAlreadyInCart.size());
request.setAttribute("alreadyInCart", itemsAlreadyInCart);
return "cart.jsp";
}
/**
* Get total cost of purchase in cart.
*
* @param myCart The cart.
* @return The total cost.
*/
public float getTotal(Cart myCart) {
float total = 0;
for (Stock s : myCart.getItems()) {
total += s.getPrice();
}
return total;
}
/**
* Check out the items that the user had added into cart and display the list of items without
* check boxes. Users cannot remove items on this page.
*
* @param request The HttpServletRequest
* @return The next page to be directed to.
*/
public String checkout(HttpServletRequest request) {
Cart myCart = (Cart) request.getSession().getAttribute("cart");
float totalPrice = 0;
for (Stock s : myCart.getItems()) {
totalPrice += s.getPrice();
}
request.setAttribute("totalCost", totalPrice);
return "confirm.jsp";
}
@Override
public void reserveInventory(Cart cart) {
for (Item item : cart.getItems()) {
try {
inventorySystem.reserve(item.sku, item.quantity);
} catch (InsufficientInventoryException insufficientInventoryException) {
throw new OrderException(
"Insufficient inventory for item " + item.sku, insufficientInventoryException);
}
}
}
/**
* Remove the selected items in cart.
*
* @param request The HttpServletRequest that contains the items to be removed.
* @return The name of the JSP page to be directed to.
*/
public String remove(HttpServletRequest request) {
Cart myCart = (Cart) request.getSession().getAttribute("cart");
LinkedList<Stock> itemsInCart = myCart.getItems();
String[] itemsToRemove = request.getParameterValues("removeFromCart");
if (itemsToRemove == null) return "cart.jsp";
for (String item : itemsToRemove) {
itemsInCart.remove(getItem(item));
}
request.setAttribute("cartSize", myCart.getCartSize());
request.setAttribute("totalCost", getTotal(myCart));
return "cart.jsp";
}
