/// <summary>
/// 產生指定的PointTransactionDetail
/// </summary>
/// <param name="point">分數</param>
/// <param name="transactionDate">此分數交易日期</param>
/// <param name="expireDate">分數到期日</param>
/// <returns></returns>
public PointTransactionDetail CreatePointDetail(decimal point, DateTime?transactionDate = null, DateTime?expireDate = null)
{
PointTransactionDetail transactionDetail = new PointTransactionDetail();
transactionDetail.Point = point;
if (transactionDate != null)
{
transactionDetail.TransactionDateTime = transactionDate.Value;
}
if (expireDate != null)
{
transactionDetail.ExprieDate = expireDate.Value;
}
return(transactionDetail);
}
/// <summary>
/// 抵銷分數。不論是扣除現有正分、或是抵銷現有負分
/// </summary>
/// <param name="currentPoint"></param>
private void OffsetPoint(PointTransactionDetail currentPoint)
{
//現在這個的交易日>queue的第一個分數的到期日
var IsExpired = currentPoint.TransactionDateTime > _pointsInQueue[0].ExprieDate;
if (IsExpired)
{
_pointsInQueue.RemoveAt(0);
OffsetPoint(currentPoint);
}
else
{
var pointGap = Math.Abs(_pointsInQueue[0].Point.Value) - Math.Abs(currentPoint.Point.Value);
if (pointGap > 0)
{
//分數夠用直接用掉，更新第一個的分數
_pointsInQueue[0].Point += currentPoint.Point;
}
else if (pointGap == 0)
{
//分數剛好扣完，直接把紀錄抵銷
_pointsInQueue.RemoveAt(0);
}
else
{
//分數不夠扣，先算還剩多少分要扣，第一個再拿掉
currentPoint.Point += _pointsInQueue[0].Point;
_pointsInQueue.RemoveAt(0);
//如果分數還有再扣第二個
if (_pointsInQueue.Count != 0)
{
OffsetPoint(currentPoint);
}
else
{
_pointsInQueue.Add(currentPoint);
}
}
}
}
private void AccumulatePoint(PointTransactionDetail pointTransactionDetail)
{
bool isAdd = false;
for (int i = 0; i < _pointsInQueue.Count; i++)
{
//比較到期日，新資料的到期日較早，則放前面
if (_pointsInQueue[i].ExprieDate > pointTransactionDetail.ExprieDate)
{
_pointsInQueue.Insert(i, pointTransactionDetail);
isAdd = true;
break;
}//到期日同一天
else if (_pointsInQueue[i].ExprieDate > pointTransactionDetail.ExprieDate && _pointsInQueue[i].CreateDateTime > pointTransactionDetail.CreateDateTime)
{
}
}
if (!isAdd)
{
_pointsInQueue.Add(pointTransactionDetail);
}
}
