public virtual IReadOnlyCollection <TimeRange> RemoveRanges(IReadOnlyCollection <TimeRange> rangesToRemove)
{
rangesToRemove.ThrowIfNullOrEmpty(nameof(rangesToRemove));
IReadOnlyCollection <DayRange> days = SplitByDays();
DayRange[] daysNotInTheRangesToRemove = days
.Where(day => rangesToRemove.All(range => !range.Contains(day)))
.OrderBy(x => x.From)
.ToArray();
if (!daysNotInTheRangesToRemove.Any())
{
return(Array.Empty <TimeRange>());
}
var result = new List <TimeRange>();
DayRange previous, start;
previous = start = daysNotInTheRangesToRemove.First();
// index = 1 because we have to skip the first element
for (var index = 1; index < daysNotInTheRangesToRemove.Length; index++)
{
DayRange dayRange = daysNotInTheRangesToRemove[index];
if (!dayRange.NextFor(previous))
{
result.Add(new TimeRange(
start.AsDate(),
daysNotInTheRangesToRemove[index - 1].AsDate()));
start = dayRange;
}
if (index == daysNotInTheRangesToRemove.Length - 1)
{
result.Add(new TimeRange(
start.AsDate(),
dayRange.AsDate()));
}
previous = dayRange;
}
return(result);
}
public bool NextFor(DayRange second)
{
second.ThrowIfNull(nameof(second));
return(this.AsDate().SameDay(second.AsDate().AddDays(1)));
}
