/**
 * 
 * @desc   格式化现在距${endTime}的剩余时间
 * @param  {Date} endTime  
 * @return {String}
 */
function formatRemainTime(endTime) {
    var startDate = new Date(); //开始时间
    var endDate = new Date(endTime); //结束时间
    var t = endDate.getTime() - startDate.getTime(); //时间差
    var d = 0,
        h = 0,
        m = 0,
        s = 0;
    if (t >= 0) {
        d = Math.floor(t / 1000 / 3600 / 24);
        h = Math.floor(t / 1000 / 60 / 60 % 24);
        m = Math.floor(t / 1000 / 60 % 60);
        s = Math.floor(t / 1000 % 60);
    };
    return d + "天 " + h + "小时 " + m + "分钟 " + s + "秒";
};

module.exports = formatRemainTime;