package com.bdqn.action;
import java.io.IOException;
import java.util.List;

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

import com.bdqn.entity.PageBean;
import com.bdqn.entity.easybuy_news;
import com.bdqn.mvc.DispatcherServlet;
import com.bdqn.service.CommonService;
import com.bdqn.service.CommonServiceImpl;
import com.bdqn.service.NewsDaoService;
import com.bdqn.service.NewsDaoServiceImpl;
import com.bdqn.util.ActionForward;
import com.bdqn.util.JsAlertUtil;
/**
 * 
 * @author T11 小熊
 *
 */
public class CrudNewsAction extends DispatcherServlet {
	private CommonService services = new CommonServiceImpl();
	private NewsDaoService dao = new NewsDaoServiceImpl();
	//http://localhost:8080/EasyBuy/newscrud.do?method=queryNews
	public ActionForward queryNews(Object entity,HttpServletRequest req, HttpServletResponse res)
	throws ServletException, IOException{
		//http://localhost:8080/EasyBuy/newscrud.do?method=queryNews
		System.out.println("进入到CrudNewsAction--queryNews了");
		System.out.println("CrudNewsAction--queryNews--entity:"+entity);
		//获取news.jsp分页页码
		String currentNum = req.getParameter("currentNum");
		System.out.println("CrudNewsAction--queryNews--currentNum--01:"+currentNum);
		//如果页码等于空
		if(currentNum == null){
			//就回到第一页
			currentNum = "1";
		}
		System.out.println("CrudNewsAction--queryNews--currentNum--02:"+currentNum);
		//根据页码查询第currentNum页五条新闻赋值给page泛型为'easybuy_news'
		PageBean<easybuy_news> page = dao.queryPage(Integer.parseInt(currentNum));
		System.out.println("CrudNewsAction--queryNews--page:"+page);
		//绑定转发数据为page
		req.setAttribute("page",page);
		System.out.println("离开了CrudNewsAction--queryNews");
		//转发到news.jsp
		return new ActionForward("/manage/news.jsp",false);
	}
	public ActionForward queryById(Object entity,HttpServletRequest req, HttpServletResponse res)
	throws ServletException, IOException{
		System.out.println("进入到CrudNewsAction--queryById了");
		System.out.println("CrudNewsAction--queryById--entity:"+entity);
		//根据entity里面的en_id查询一条新闻的详细信息
		Object news = services.queryById(entity);
		System.out.println("CrudNewsAction--queryById--news:"+news);
		System.out.println("离开了CrudNewsAction--queryById");
		//绑定数据为一条新闻的详细信息
		req.setAttribute("news",news);
		//转发到news-modify.jsp
		return new ActionForward("/manage/news-modify.jsp",false);
	}
	public ActionForward addNews(Object entity,HttpServletRequest req, HttpServletResponse res)
	throws ServletException, IOException{
		System.out.println("进入到CrudNewsAction--addNNews了");
		//获取页面表单数据执行增加新闻操作
		int result = services.save(entity);
		//>0成功
		if(result > 0){
			//重定向到newscrud.do?method=queryNews方法
			return new ActionForward("newscrud.do?method=queryNews",true);
		}else{
			System.out.println("离开了CrudNewsAction--addNNews");
			//js跳转到news-add.jsp弹出提示框
			return new JsAlertUtil().jsAlert(res,"/manage/news-add.jsp","增加失败！");
		}
	}
	public ActionForward updateNews(Object entity,HttpServletRequest req, HttpServletResponse res)
	throws ServletException, IOException{
		System.out.println("进入到CrudNewsAction--updateNews了");
		//根据页面传过来的en_id和修改信息进行修改操作
		int result = services.update(entity);
		//>0成功
		if(result > 0){
			//重定向到newscrud.do?method=queryNews方法
			return new ActionForward("newscrud.do?method=queryNews",true);
		}else{
			//js跳转newscrud.do?method=queryNews方法弹出提示框
			return new JsAlertUtil().jsAlert(res,"newscrud.do?method=queryNews","修改失败！");
		}
	}
	public ActionForward deleteNews(Object entity,HttpServletRequest req, HttpServletResponse res)
	throws ServletException, IOException{
		System.out.println("进入到CrudNewsAction--deleteNews了");
		//根据页面传过来的en_id进行删除操作
		int result = services.delete(entity);
		//>0修改成功
		if(result > 0){
			//重定向到newscrud.do?method=queryNews方法
			return new ActionForward("newscrud.do?method=queryNews",true);
		}else{
			//js跳转newscrud.do?method=queryNews方法弹出提示框
			return new JsAlertUtil().jsAlert(res,"newscrud.do?method=queryNews","删除失败！");
		}
	}
}