'use strict';

const md5 = require('md5');

class Common {
	static sortDict(obj) {                         //dict按key排序
        return Object.keys(obj).sort().reduce(function(result, key) {
            result[key] = obj[key];
            return result;
        }, {});
    }

    static sign(params, token) {                    //对参数做MD5签名
        return md5( JSON.stringify(Common.sortDict(params)) + token );
    }

    static isPhoneNumber(number) {
        return /^1[3-9][0-9]{9}$/i.test(number);
    }

    static isVerifyCode(code) {
        return /^[0-9]{4}$/i.test(code);
    }
}

exports.default = Common;