package login.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;


public class CookieUtil {

    public static void addCookie(HttpServletResponse response, String name, String value, int maxAge){
        Cookie cookie = new Cookie(name,value);
        cookie.setPath("/");
        if(maxAge>0)  cookie.setMaxAge(maxAge);
        response.addCookie(cookie);
    }

    public static Cookie getCookieByName(HttpServletRequest request, String name){
        Map<String,Cookie> cookieMap = ReadCookieMap(request);
        if(cookieMap.containsKey(name)){
            Cookie cookie = (Cookie)cookieMap.get(name);
            return cookie;
        }else{
            return null;
        }
    }

    private static Map<String,Cookie> ReadCookieMap(HttpServletRequest request){
        Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();
        Cookie[] cookies = request.getCookies();
        if(null!=cookies){
            for(Cookie cookie : cookies){
                cookieMap.put(cookie.getName(), cookie);
            }
        }
        return cookieMap;
    }
}
