/// <summary>
/// 合并时段。如果有相交的时段，则合并。
/// </summary>
/// <param name="spans">时段集合</param>
/// <returns></returns>
public static List <BufferedTimePeriod> Merge(List <BufferedTimePeriod> spans)
{
List <BufferedTimePeriod> outs = new List <BufferedTimePeriod>();
spans.Sort();
BufferedTimePeriod last = null;
foreach (var item in spans)
{
if (last == null)
{
last = item;
continue;
}
if (last.BufferedContains(item.Start))
{
last = BufferedTimePeriod.Merge(last, item);
}
else
{
outs.Add(last);
last = null;
}
}
if (last != null)
{
outs.Add(last);
}
return(outs);
}
