package com.pine.common.utils;

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 {

    /**
     * 设置cookie
     *
     * @param response
     * @param name     cookie名字
     * @param value    cookie值
     * @param maxAge   cookie生命周期  以秒为单位
     */
    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);
    }


    /**
     * 根据名字获取cookie
     *
     * @param request
     * @param name    cookie名字
     * @return
     */
    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;
        }
    }


    /**
     * 将cookie封装到Map里面
     *
     * @param request
     * @return
     */
    public 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;
    }


    /**
     * <p>判断cookie是否存在。</p>
     *
     * @param request
     * @param name    cookie名字
     * @return
     */
    public static boolean checkCookieExist(HttpServletRequest request, String name) {

        Cookie[] cookies = request.getCookies();
        if (null != cookies) {
            for (Cookie cookie : cookies) {
                if (name.equals(cookie.getName())) {
                    return true;
                }

            }
        }
        return false;
    }

}
