package com.greenorange.promotion.utils;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Calendar;
import java.util.Map;

public class JWTUtils {

    /**
     * 生成token  header.payload.signature
     */
    private static final String SECRET = "qingcheng";

    public static String getToken(Map<String, String> map) {

        Calendar instance = Calendar.getInstance();
        // 默认7天过期
        instance.add(Calendar.DATE, 7);

        //创建jwt builder
        JWTCreator.Builder builder = JWT.create();

        // payload
        map.forEach(builder::withClaim);
        return builder.withExpiresAt(instance.getTime())  //指定令牌过期时间
                .sign(Algorithm.HMAC256(SECRET));
    }

    /**
     * 验证token  合法性
     */
    public static DecodedJWT verify(String token) {
        return JWT.require(Algorithm.HMAC256(SECRET)).build().verify(token);
    }
}