package com.liquidnet.client.job.core.util;

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

/**
 * Cookie.Util
 */
public class CookieUtil {

	// 默认缓存时间,单位/秒, 2H
	private static final int COOKIE_MAX_AGE = Integer.MAX_VALUE;
	// 保存路径,根路径
	private static final String COOKIE_PATH = "/";
	
	/**
	 * 保存
	 *
	 * @param response
	 * @param key
	 * @param value
	 * @param ifRemember 
	 */
	public static void set(HttpServletResponse response, String key, String value, boolean ifRemember) {
		int age = ifRemember?COOKIE_MAX_AGE:-1;
		set(response, key, value, null, COOKIE_PATH, age, true);
	}

	/**
	 * 保存
	 *
	 * @param response
	 * @param key
	 * @param value
	 * @param maxAge
	 */
	private static void set(HttpServletResponse response, String key, String value, String domain, String path, int maxAge, boolean isHttpOnly) {
		Cookie cookie = new Cookie(key, value);
		if (domain != null) {
			cookie.setDomain(domain);
		}
		cookie.setPath(path);
		cookie.setMaxAge(maxAge);
		cookie.setHttpOnly(isHttpOnly);
		response.addCookie(cookie);
	}
	
	/**
	 * 查询value
	 *
	 * @param request
	 * @param key
	 * @return
	 */
	public static String getValue(HttpServletRequest request, String key) {
		Cookie cookie = get(request, key);
		if (cookie != null) {
			return cookie.getValue();
		}
		return null;
	}

	/**
	 * 查询Cookie
	 *
	 * @param request
	 * @param key
	 */
	private static Cookie get(HttpServletRequest request, String key) {
		Cookie[] arr_cookie = request.getCookies();
		if (arr_cookie != null && arr_cookie.length > 0) {
			for (Cookie cookie : arr_cookie) {
				if (cookie.getName().equals(key)) {
					return cookie;
				}
			}
		}
		return null;
	}
	
	/**
	 * 删除Cookie
	 *
	 * @param request
	 * @param response
	 * @param key
	 */
	public static void remove(HttpServletRequest request, HttpServletResponse response, String key) {
		Cookie cookie = get(request, key);
		if (cookie != null) {
			set(response, key, "", null, COOKIE_PATH, 0, true);
		}
	}

}