const config = require("../config")
const rsa = require("../utils/rsa")
const jwt = require('jsonwebtoken');
/**
 * 拦截器，验证 token，data
 * @type {{Validator(*, *, *): void}}
 */
module.exports = {
    Validator(req, res, next) {
        if(req.headers.hasOwnProperty("data")) {
            try {
                req.headers.data = rsa.PrivateKeyDecryption(req.headers.data)
                if(req.url == config.filter.login || req.url == config.filter.add) {
                    next()
                } else {
                    if(req.headers.hasOwnProperty("token")) {
                        jwt.verify(req.headers.token,config.jwt,function(err,decode){
                            if(err){
                                res.json({
                                    status: 501,
                                    message: '身份凭证失效或不存在，请登录'
                                })
                            }else{
                                next();
                            }
                        });
                    } else { // 无token
                        res.json({
                            status: 500,
                            message: '缺少token参数，请检查'
                        })
                    }
                }
            } catch (e) {
                res.json({
                    status: 500,
                    message: '抱歉，公钥加密有误，请检查公钥'
                })
            }
        } else {
            res.json({
                status: 500,
                message: '请求头缺少data参数'
            })
        }
    }
}