package com.elan.forum.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class ForumAdminFilter extends HttpServlet implements Filter {
	private static final Log log = LogFactory.getLog(ForumAdminFilter.class);
	protected FilterConfig filterConfig = null;

	public void destroy() {
		this.filterConfig = null;
	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		HttpSession session = request.getSession();
		if (session.getAttribute("admin") == null) {
			System.out.println("用戶沒有登陸");
			response.sendRedirect("/ElanNet/jsp/forum/admin/AdminLogon.jsp");
		} else {
			chain.doFilter(arg0, arg1);
		}
	}

	public void init(FilterConfig arg0) throws ServletException {
		this.filterConfig = arg0;
	}

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		super.doGet(req, resp);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		super.doPost(req, resp);
	}

}