requesttoeventtranslator.java

一个优秀的供应商管理系统

package apusic.myshop.control.web;



import java.util.HashMap;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import apusic.myshop.control.EventException;
import apusic.myshop.control.event.BaseEvent;
import apusic.myshop.control.event.LoginEvent;
import apusic.myshop.control.event.LogoutEvent;
import apusic.myshop.control.event.CartEvent;
import apusic.myshop.control.event.CustomerEvent;
import apusic.myshop.control.event.DBLoginEvent;
import apusic.myshop.control.event.OrderEvent;

import apusic.myshop.util.Debug;
import apusic.myshop.control.web.PathNames;
import apusic.myshop.util.Calendar;
import apusic.myshop.util.CreditCard;
import apusic.myshop.util.ContactInfo;
import apusic.myshop.util.WebKeys;
import apusic.myshop.customer.model.CustomerModel;
import apusic.myshop.util.JSPUtil;
import apusic.myshop.cart.model.CartModel;

//将客户端的请求转换成事件REQUEST————》EVENT
public class RequestToEventTranslator {

  private RequestProcessor sessionClientController;
  private ModelManager mm;

  public RequestToEventTranslator(RequestProcessor sessionClientController,
    ModelManager mm) {
    this.sessionClientController = sessionClientController;
    this.mm = mm;
  }

  public BaseEvent processRequest(HttpServletRequest req) throws EventException,  MissingFormDataException  {
    // Process the request and get the necessary event depending on the URL
    String selectedUrl = req.getPathInfo();
    BaseEvent event = null;
    if (selectedUrl == null) {
      // do nothing. show the default screen.
      return null;
    } else if (selectedUrl.equals(PathNames.CATALOG_URL)) {
      //event = createCatalogEvent(req);
    } else if (selectedUrl.equals(PathNames.CART_URL)) {
      mm.getCartModel();
      event = createCartEvent(req);
    } else if (selectedUrl.equals(PathNames.LOGOUT_URL)) {
      event = new LogoutEvent();
    } else if (selectedUrl.equals(PathNames.VERIFY_LOGIN_URL)) {
      event = createDBLoginEvent(req);
    } else if (selectedUrl.equals(PathNames.VALIDATE_NEW_CUSTOMER_URL)) {
      event = createCustomerEvent(req);
    } else if (selectedUrl.equals(PathNames.COMMIT_ORDER_URL)) {
      event = createOrderEvent(req);
    } else if (selectedUrl.equals(PathNames.VALIDATE_BILLING_INFORMATION_URL)) {
      getBillingInformation(req);
    } else if (selectedUrl.equals(PathNames.VALIDATE_SHIPPING_INFORMATION_URL)) {
      extractShippingInformation(req);
    }
    return event;
  }

//事件1
  public BaseEvent createLoginEvent(HttpServletRequest request) {
    return new LoginEvent();
  }

//事件2
  public DBLoginEvent createDBLoginEvent(HttpServletRequest request)
    throws MissingFormDataException{
    Debug.println("login through db ");
    ArrayList missingFields = null;
    DBLoginEvent event = new DBLoginEvent();
    String userId = request.getParameter("userId").trim();
    if (userId.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("用户账号");
    }

    String password = request.getParameter("password").trim();
    if (password.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
	    }
      missingFields.add("密码");
    }
    if (missingFields != null) {
      throw new MissingFormDataException("漏输账号信息", missingFields);
	  }
    event.setInfo(userId, password);
    return event;
  }
  
  //事件3
  public CustomerEvent createCustomerEvent(HttpServletRequest request)
    throws MissingFormDataException {

    Debug.println("Creating new Customer");
    ArrayList missingFields = null;
    CustomerEvent event = new CustomerEvent();

	  String userId = request.getParameter("userId").trim();
    if (userId.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("用户账号");
    }

    String password = request.getParameter("password").trim();
    if (password.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
	    }
      missingFields.add("密码");
    }

    String name = request.getParameter("name").trim();
    if (name.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("姓名");
    }

    String sex = request.getParameter("sex").trim();

    String company = request.getParameter("company").trim();
    if (company.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("单位");
    }

    String cid = request.getParameter("cid").trim();
    if (cid.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("身份证号码");
    }

    String address = request.getParameter("address").trim();
    if (address.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("详细地址");
    }

    String province = request.getParameter("province").trim();
    if (province.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("省份");
    }

    String city = request.getParameter("city").trim();
    if (city.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("城市");
    }

    String zip = request.getParameter("zip").trim();
    if (zip.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("邮政编码");
    }

    String phone = request.getParameter("phone").trim();
    if (phone.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("联系电话");
    }

	  String email = request.getParameter("email").trim();
	  if (email.equals("")) {
      if (missingFields == null) {
        missingFields = new ArrayList();
      }
      missingFields.add("E-Mail 地址");
    }

    java.sql.Date regDate = new java.sql.Date((new java.util.Date()).getTime());

	  if (missingFields != null) {
      throw new MissingFormDataException("漏输客户信息", missingFields);
	  }
	  event.setInfo(userId, password, name, sex,
      company, cid, address, province,
      city, zip, phone, email, regDate
    );
	  return event;
  }

//事件4
  private CartEvent createCartEvent(HttpServletRequest request) {
    Debug.println("Started Create Cart Event");
    String action = request.getParameter("action");
    if (action == null) {
      return null;
    } else if (action.equals("purchaseItem")) {
      return createPurchaseItemEvent(request);
    } else if (action.equals("removeItem")) {
      return createRemoveItemEvent(request);
    } else if (action.equals("updateCart")) {
      return createUpdateCartEvent(request);
    }
    return null;
  }

//事件5
  private CartEvent createPurchaseItemEvent(HttpServletRequest request) {
    Debug.println("Started Purchase Action");
    CartEvent event = null;
    try {
      // get the id number from the parameter
      String id = request.getParameter("itemId").trim();
      ArrayList itemIds = new ArrayList();
      itemIds.add(id);
      event = new CartEvent(CartEvent.ADD_ITEM, itemIds);
    } catch(Exception e) {
      Debug.print(e);
    }
    return event;
  }

//事件6
  private CartEvent createRemoveItemEvent(HttpServletRequest request) {
    Debug.println("Started Remove Action");
    CartEvent event = null;
    try {
      // get the id number from the parameter
      String id = request.getParameter("itemId").trim();
      ArrayList itemIds = new ArrayList();
      itemIds.add(id);
      event = new CartEvent(CartEvent.DELETE_ITEM, itemIds);
    } catch(Exception e) {
      Debug.print(e);
    }
    return event;
  }

//事件7
  private CartEvent createUpdateCartEvent(HttpServletRequest request) {
    CartEvent event = null;
    HashMap quantities = new HashMap();
    ArrayList itemIds = new ArrayList();
    Debug.println("RequestToEventTranslator: Updating Cart Item quantities");
    Enumeration enum = request.getParameterNames();
    while ((enum != null) && enum.hasMoreElements()) {
      String param = ((String)enum.nextElement()).trim();
      if ((param != null) && param.startsWith("itemQuantity_")) {
        try{
          // get the item id number from the parameter
          String id = param.substring("itemQuantity_".length(),
          param.length());
          Integer quantity = new Integer(0);
          if (id != null) {
            // remove image map info from the parameter
            if (id.lastIndexOf(".") != -1) {
              id = id.substring(0, id.lastIndexOf("."));
            }
            try {
              quantity= Integer.valueOf(request.getParameter(param));
              itemIds.add(id);
              quantities.put(id, quantity);
            } catch (NumberFormatException ex) {
              // if the user uses something other than numbers leave as is
            }
            event = new CartEvent(CartEvent.UPDATE_ITEM,  itemIds, quantities);
          }
        } catch(Exception e) {
          Debug.print(e);
        }
      }
    }
    return event;
  }


  private void getBillingInformation(HttpServletRequest request)
  	throws MissingFormDataException {

    Debug.println("Getting Billing Information");
	  ArrayList missingFields = null;

    String monthString = request.getParameter("expiration_month");
	  if (monthString.equals("")) {
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("Credit Card Month");
	  }
	  int month = Integer.parseInt(monthString);

  	String yearString = request.getParameter("expiration_year");
	  if (yearString.equals("")){
      if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("Credit Card Year");
	  }
	  int year = Integer.parseInt(yearString);

	  Calendar expiryDate = Calendar.getInstance();
	 // months in Calendar start at 0 and not one
  	expiryDate.set(Calendar.MONTH, month-1);
	  expiryDate.set(Calendar.YEAR, year);
  	String cardType = request.getParameter("credit_card_type").trim();
	  if (cardType.equals("")) {
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("信用卡类别");
	  }
  	String cardNo = request.getParameter("credit_card_number").trim();
	  if (cardNo.equals("")) {
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("卡号");
	  }
  	if (missingFields != null) {
	    throw new MissingFormDataException("漏输信用卡信息", missingFields);
	  }
    HttpSession session = request.getSession();
	  CreditCard card = new CreditCard(cardNo, cardType, expiryDate);
	  session.setAttribute(WebKeys.CreditCardKey, card);

    // get billing address
    ContactInfo billingContactInfo = extractContactInfo(request);
	  session.setAttribute(WebKeys.BillingContactInfoKey, billingContactInfo);

    // copy shipping address if the same as billing address
    if (request.getParameter("ship_to_billing_address") != null) {
	    session.setAttribute(WebKeys.ShippingContactInfoKey,
				 billingContactInfo);
	    session.setAttribute(WebKeys.ShippingAddressRequiredKey, "false");
	  } else {
	    session.setAttribute(WebKeys.ShippingAddressRequiredKey, "true");
	  }
    Debug.println("<<<get bill info end.");
  }

  private void extractShippingInformation(HttpServletRequest request)
    throws MissingFormDataException {

	  Debug.println("Extracting Shipping Information");
	  request.getSession().setAttribute(WebKeys.ShippingContactInfoKey,
      extractContactInfo(request));
  }

  // parse address form and generate a ContactInformation object
  private ContactInfo extractContactInfo(HttpServletRequest request)
	  throws MissingFormDataException {

	  ArrayList missingFields = null;
	  String name =  request.getParameter("name").trim();
	  if (name.equals("")) {
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("姓名");
	  }

    String phone = request.getParameter("phone").trim();
	  if (phone.equals("")){
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("电话号码");
	  }
    String email = request.getParameter("email");

    String address = request.getParameter("address").trim();
	  if (address.equals("")){
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("详细地址");
	  }

    String province = request.getParameter("province").trim();
	  if (province.equals("")) {
	    if (missingFields == null) {
		    missingFields = new ArrayList();
	    }
	    missingFields.add("省份");
	  }

	  String city = 	request.getParameter("city").trim();
	  if (city.equals("")){
	    if (missingFields == null) {
		    missingFields = new ArrayList();
      }
	    missingFields.add("所在城市");
	  }


    String zip = request.getParameter("zip").trim();
	  if (zip.equals("")){
	    if (missingFields == null) {
		    missingFields = new ArrayList();
      }
	    missingFields.add("邮政编码");
	  }

	  String country = request.getParameter("country");
	  if (missingFields != null) {
	    throw new MissingFormDataException("漏输地址信息", missingFields);
	  }
	  return new ContactInfo(name, phone, email, address,
      province, city, zip, country);
  }

//事件8
  private OrderEvent createOrderEvent(HttpServletRequest request) {

	  Debug.println("Creating Order Event");
	  CustomerModel customer = mm.getCustomerModel();
	  int requestId = JSPUtil.getEventId();
	  CartModel cart = mm.getCartModel();
	  OrderEvent oe = new OrderEvent();

	  HttpSession session = request.getSession();
	  ContactInfo shippingInfo = (ContactInfo)
	    session.getAttribute(WebKeys.ShippingContactInfoKey);
	  ContactInfo billingInfo = (ContactInfo)
	    session.getAttribute(WebKeys.BillingContactInfoKey);
    //String carrier = (String) session.getAttribute(WebKeys.CarrierKey);
    String userId = (String) session.getAttribute(WebKeys.UserIdKey);
	  CreditCard creditCard = (CreditCard)
      session.getAttribute(WebKeys.CreditCardKey);
	  oe.setInfo(requestId, userId, shippingInfo.getName(),
      shippingInfo.getAddress(), shippingInfo.getProvince(),
      shippingInfo.getCity(), shippingInfo.getZip(),
      shippingInfo.getCountry(), billingInfo.getName(),
      billingInfo.getAddress(), billingInfo.getProvince(),
      billingInfo.getCity(), billingInfo.getZip(),
      billingInfo.getCountry(), creditCard);

	  // set up the request id attribute so that the pages can
	  // create orderwebimpl correctly.
	  request.setAttribute(WebKeys.RequestIdKey, new Integer(requestId));
	  return oe;
  }

}