/**
     * 新的数据格式计算倒计时
     *
     * @param courseNew
     * @return CountDownDto
     */
    public static CountDownDto calculateSeries(CourseNew courseNew) {
        CountDownDto countDownDto = new CountDownDto();
        if (courseNew == null) {
            return countDownDto;
        }

        // 需要在拿到数据的时候塞进去本地的时间
        Long localCurTime = courseNew.getLocalTime();
        Long serverCurTime = courseNew.getCurrentTime();

        int lastIndex = courseNew.getCourseDetailDtos().size() - 1;
        int i = 0;
        for (CourseResNew.CourseOutlineDto outline : courseNew.getCourseDetailDtos()) {
            Long courseStartTime = outline.getStartTime();
            /** 开始倒计时的时间点 **/
            Long startCountDownTime = new Date().getTime();

            // 开课剩余时间
            Long limitTime = courseStartTime - serverCurTime - (startCountDownTime - localCurTime);

            if (serverCurTime < courseStartTime && limitTime > 0) {// 有课次还未开课，返回倒计时数据
                countDownDto.setIndex(i);
                countDownDto.setStatus(CountDownDto.COUNTDOWN);
                countDownDto.setData(calculateBylimitTime(limitTime));
                break;
            }

            if (outline.getEndTime() - courseNew.getCurrentTime() > System.currentTimeMillis() - courseNew
                    .getLocalTime()) {// 直播中
                countDownDto.setIndex(i);
                countDownDto.setStatus(CountDownDto.LIVEING);
                break;
            } else {// 已结束
                if (i == lastIndex) {// 最后一项
                    countDownDto.setIndex(i);
                    countDownDto.setStatus(CountDownDto.END);
                }
            }
            i++;
        }
        return countDownDto;
    }