<?php
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// | likeadmin快速开发前后端分离管理后台（PHP版）
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// +----------------------------------------------------------------------
// | author: likeadminTeam
// +----------------------------------------------------------------------


namespace app\api\service;

use Firebase\JWT\JWT;
use Firebase\JWT\Key;
use Firebase\JWT\SignatureInvalidException;
use Firebase\JWT\BeforeValidException;
use Firebase\JWT\ExpiredException;
use think\facade\Config;

class JwtTokenService
{
    /**
     * @param int $id
     * @param string $type
     * @param $exp
     * @param array $params
     * @return array
     * @author xaboy
     * @day 2020/10/13
     */
    public static function createToken(int $id, array $userinfo, array $params = [])
    {
        $time = time();
        $host = app('request')->host();
        $params += [
            'iss' => $host, //签发者
            'aud' => $host, //签发时间
            'iat' => $time,
            'nbf' => $time, //生效时间
            'exp' => $time + 7 * 24 * 3600,
        ];
        $params['data'] = [
            'uid' => $id,
            'phone' => $userinfo['phone'],
            'avatar' => $userinfo['avatar'],
            'nickname' => $userinfo['nickname']
        ];
        $token = JWT::encode($params, env('app.app_key', ''), 'HS256');
        $tokenInfo = [
            'uid'   => $id,
            'phone' => $userinfo['phone'],
            'token' => $token
        ];
        return $tokenInfo;
    }

    /**
     * @param string $token
     * @return object
     * @throws SignatureInvalidException    Provided JWT was invalid because the signature verification failed
     * @throws BeforeValidException         Provided JWT is trying to be used before it's eligible as defined by 'nbf'
     * @throws BeforeValidException         Provided JWT is trying to be used before it's been created as defined by 'iat'
     * @throws ExpiredException             Provided JWT has since expired, as defined by the 'exp' claim
     * @throws UnexpectedValueException     Provided JWT was invalid
     * @author xaboy
     * @day 2020-04-09
     */
    public static function parseToken(string $token)
    {
        try {
            JWT::$leeway = 10; //当前时间减去10秒，时间留点余地
            $decoded = JWT::decode($token, new Key(env('app.app_key', ''), 'HS256'));
            $decodedArray = json_decode(json_encode($decoded), true);
            $jwtData = $decodedArray['data'] ?? [];
            return $jwtData;
        } catch(\Firebase\JWT\SignatureInvalidException $e) {
            throw new \think\Exception('签名错误');
        } catch(\Firebase\JWT\BeforeValidException $e) {
            throw new \think\Exception('token无效'); 
        } catch(\Firebase\JWT\ExpiredException $e) {
            throw new \think\Exception('token已过期'); 
        } catch(\Exception $e) {
            throw new \think\Exception('非法请求');
        }
    }

}