/// <summary>取得日期時間區段清單的聯集</summary>
public static IEnumerable <DateTimeSection> UnionSection(this IEnumerable <DateTimeSection> source, IEnumerable <DateTimeSection> target)
{
source = source.Concat(target).Where(x => x != null).OrderBy(x => x.Start);
using (IEnumerator <DateTimeSection> iter = source.GetEnumerator())
{
if (!iter.MoveNext())
{
yield break;
}
var cursor = new DateTimeSection(iter.Current);
while (iter.MoveNext())
{
if (iter.Current.Start <= cursor.End)
{
cursor.End = OrionUtils.Max(iter.Current.End, cursor.End);
continue;
}
yield return(cursor);
cursor = new DateTimeSection(iter.Current);
}
yield return(cursor);
}
}
/// <summary>取得重疊日期時間區段</summary>
public static DateTimeSection Overlap(this DateTimeSection sectionA, DateTimeSection sectionB)
{
return(new DateTimeSection
{
Start = OrionUtils.Max(sectionA.Start, sectionB.Start),
End = OrionUtils.Min(sectionA.End, sectionB.End),
});
}
