<?php
require_once COMMPATH . 'libraries/JWT.php';

use \Firebase\JWT\JWT;

/**
 * 验证token
 */
class ValidToken
{
    private $jwt_key_system; //系统推送token
    private $jwt_key_pingan; //平安后台
    private $jwt_algorithm;

    public function __construct()
    {
        $this->ci = &get_instance();
        $this->ci->config->load('wss');
        $this->jwt_key_pingan = $this->ci->config->item('jwt_key_pingan');
        $this->jwt_key_system = $this->ci->config->item('jwt_key_system');
        $this->jwt_algorithm = $this->ci->config->item('jwt_algorithm');
    }

    public function validateToken($token, $platform)
    {
        try {
            $uid = 0;
            switch ($platform) {
                case Ws_conn_model::PLAT_FORM_ADMIN:
                    $uid = JWT::decode($token, $this->jwt_key_system, array($this->jwt_algorithm));
                    if (!$uid) {
                        throw new Exception('授权失败', WsResponse::CODE_UNAUTHORIZED);
                    }
                    break;
                case Ws_conn_model::PLAT_FORM_PINGAN:
                    $uid = JWT::decode($token, $this->jwt_key_pingan, array($this->jwt_algorithm));
                    if (!$uid) {
                        throw new Exception('授权失败', WsResponse::CODE_UNAUTHORIZED);
                    }
                    break;
                case Ws_conn_model::PLAT_FORM_WXAPP:
                    throw new Exception('暂不支持微信小程序');
                    break;
                //服务端 推送数据
                case Ws_conn_model::PLAT_FORM_SYS_ADMIN:
                case Ws_conn_model::PLAT_FORM_SYS_PINGAN:
                case Ws_conn_model::PLAT_FORM_SYS_WXAPP:
                    $uid = JWT::decode($token, $this->jwt_key_system, array($this->jwt_algorithm));
                    if (!$uid) {
                        throw new Exception('授权失败', WsResponse::CODE_UNAUTHORIZED);
                    }
                    break;
                default:
                    throw new Exception('平台参数错误');
            }
            return new MyResponse(WsResponse::CODE_SUCCESS, '验证成功', ['uid' => $uid]);
        } catch (Exception $e) {
            return new MyResponse($e->getCode() ?: WsResponse::CODE_ERROR, $e->getMessage());
        }
    }
}