<?php
/**
 * @copyright Copyright (c) 2021 勾股工作室
 * @license https://opensource.org/licenses/GPL-3.0
 * @link https://www.gougucms.com
 */

namespace app\api\middleware;

use Firebase\JWT\JWT;
use Firebase\JWT\Key;
use think\facade\Request;
use think\Response;

class Auth
{
    public function handle($request, \Closure $next)
    {
        $token = Request::header('Token');
        if ($token) {
            if (count(explode('.', $token)) != 3) {
                return json(['code'=>404,'msg'=>'非法请求']);
            }
			$config = get_system_config('token');
            try {
				JWT::$leeway = 60;//当前时间减去60，把时间留点余地
				$decoded = JWT::decode($token, new Key($config['secrect'], 'HS256')); //HS256方式，这里要和签发的时候对应
				$decoded_array = json_decode(json_encode($decoded),TRUE);
				$jwt_data = $decoded_array['data'];
				define('JWT_UID', $jwt_data['userid']);
				$response = $next($request);
				return $response;
			} catch(\Firebase\JWT\SignatureInvalidException $e) {  //签名不正确
				return json(['code'=>403,'msg'=>'签名错误']);
			}catch(\Firebase\JWT\BeforeValidException $e) {  // 签名在某个时间点之后才能用
				return json(['code'=>401,'msg'=>'token失效']);
			}catch(\Firebase\JWT\ExpiredException $e) {  // token过期
				return json(['code'=>401,'msg'=>'token已过期']);
			}catch(Exception $e) {  //其他错误
				return json(['code'=>404,'msg'=>'非法请求']);
			}catch(\UnexpectedValueException $e) {  //其他错误
				return json(['code'=>404,'msg'=>'非法请求']);
			} catch(\DomainException $e) {  //其他错误
				return json(['code'=>404,'msg'=>'非法请求']);
			}
        } else {
            return json(['code'=>404,'msg'=>'token不能为空']);
        }
        return $next($request);
    }
}