/**
 * Copyright 2015-2025 FLY的狐狸(email:jflyfox@sina.com qq:369191470).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package com.jflyfox.jfinal.component.oauth.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.alibaba.fastjson.JSONObject;
import com.jflyfox.util.extend.RandomStrUtils;

/**
 * Token 帮助类
 * 
 */
public class TokenUtil {

	private static final String STR_S = "abcdefghijklmnopqrstuvwxyz0123456789";

	/**
	 * 参考自 qq sdk
	 * 
	 * @param @param string
	 * @param @return 设定文件
	 * @return String 返回类型
	 * @throws
	 */
	public static String getAccessToken(String string) {
		String accessToken = "";
		try {
			JSONObject json = JSONObject.parseObject(string);
			if (null != json) {
				accessToken = json.getString("access_token");
			}
		} catch (Exception e) {
			Matcher m = Pattern.compile("^access_token=(\\w+)&expires_in=(\\w+)&refresh_token=(\\w+)$").matcher(string);
			if (m.find()) {
				accessToken = m.group(1);
			} else {
				Matcher m2 = Pattern.compile("^access_token=(\\w+)&expires_in=(\\w+)$").matcher(string);
				if (m2.find()) {
					accessToken = m2.group(1);
				}
			}
		}
		return accessToken;
	}

	/**
	 * 匹配openid
	 * 
	 * @param @param string
	 * @param @return 设定文件
	 * @return String 返回类型
	 * @throws
	 */
	public static String getOpenId(String string) {
		String openid = null;
		Matcher m = Pattern.compile("\"openid\"\\s*:\\s*\"(\\w+)\"").matcher(string);
		if (m.find())
			openid = m.group(1);
		return openid;
	}

	/**
	 * sina uid于qq分离
	 * 
	 * @Title: getUid
	 * @param @param string
	 * @param @return 设定文件
	 * @return String 返回类型
	 * @throws
	 */
	public static String getUid(String string) {
		JSONObject json = JSONObject.parseObject(string);
		return json.getString("uid");
	}

	/**
	 * 生成一个随机数
	 * 
	 * @return
	 */
	public static String randomState() {
		return RandomStrUtils.random(24, STR_S);
	}

}