package com.yhcms.manage.admin.action;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.yhcms.db.DBConnException;
import com.yhcms.manage.admin.bean.AdminUser;
import com.yhcms.manage.admin.dao.UserDaoIm;
import com.yhcms.manage.admin.itface.UserDao;
import com.yhcms.utils.ReqUtils;

/**
 * <p>Title:系統后臺用戶管理</p>
 * <li>鏈接到用戶管理模塊</li>
 * <br><b>CopyRight: yyhweb[由由華網]</b>
 * @author stephen
 * @version YH-2.0
 */
public class UserMag extends Action{
	public ActionForward execute(ActionMapping actionmapping,ActionForm form,
			HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException{
		
		Logger yhlog = Logger.getLogger(LoginAction.class.getName());
		ActionMessages errors = new ActionMessages();
		
		UserDao userdao = UserDaoIm.getInstance();// 用戶數據模塊,
		
		List userList = null;                     // 所有用戶
		AdminUser curUser = null;                 // 當要更新某用戶時需要取得該用戶信息
		String action = "";						  // 用來判斷該動作是刪除還是更新用戶
		int userId = 0;
		action = ReqUtils.getString(request,"action"); 
		userId = ReqUtils.getInt(request,"userId");
		
		try {
			//  刪除一個用戶
			if(action.equals("delete")){          
				if(userdao.delAdminUser(userId)){
					return actionmapping.findForward("DeleteOk");	
				}else{
					yhlog.info("Delete a user unsuccessfully.");
					errors.add("admin.user.del.fail",new ActionMessage("admin.user.del.fail"));
					saveErrors(request,errors);
					// 刪除用戶失敗后,頁面跳轉到Success(UserMag.html).同時顯示錯誤信息
				}
			}
			//	更新一個用戶
			if(action.equals("update")){		  
				curUser = userdao.getUserById(userId);  // 取得這個用戶信息
				request.setAttribute("curUser",curUser);// 在下一個畫面(adduser.html)里要用到curUser
				request.setAttribute("action",action); 
				return actionmapping.findForward("Update");// 跳轉到AddUser.html
			}
			//  用戶管理時候需要獲得所有用戶
			userList = userdao.getAllUser();     
		} catch (DBConnException e) {
			yhlog.info("When update or delete a user,throw an Exception.");
			errors.add("admin.user.mag.ecpt",new ActionMessage("admin.user.mag.ecpt"));
			saveErrors(request,errors);
		}
			//	用戶管理時候如果沒有獲得任何用戶信息,則初始化.
		if(userList==null){
			userList = new ArrayList();
		}
		request.setAttribute("userList",userList);
		return actionmapping.findForward("Success");
	}

}