public static LocalDateTime?MinStart(LocalInterval interval1, LocalInterval interval2)
{
if (!interval1.Start.HasValue || !interval2.Start.HasValue)
{
return(null);
}
return(Min(interval1.Start.Value, interval2.Start.Value));
}
public static bool Starts(LocalInterval interval1, LocalInterval interval2)
{
if (!interval1.Start.HasValue || !interval2.Start.HasValue)
{
return(true);
}
return(Min(interval1.Start.Value, interval2.Start.Value) == interval1.Start.Value);
}
public static bool Ends(LocalInterval interval1, LocalInterval interval2)
{
if (!interval1.End.HasValue || !interval2.End.HasValue)
{
return(true);
}
return(Max(interval1.End.Value, interval2.End.Value) == interval1.End.Value);
}
public static LocalDateTime?MaxEnd(LocalInterval interval1, LocalInterval interval2)
{
if (!interval1.End.HasValue || !interval2.End.HasValue)
{
return(null);
}
return(Max(interval1.End.Value, interval2.End.Value));
}
public static bool AreTouching(LocalInterval int1, LocalInterval int2)
{
if (!int2.Start.HasValue && !int1.Start.HasValue)
{
return(true);
}
return(int2.Start.HasValue && int1.Touches(int2.Start.Value) ||
int1.Start.HasValue && int2.Touches(int1.Start.Value));
}
protected bool Equals(LocalInterval other)
{
return(string.Equals(Name, other.Name) &&
Start.Equals(other.Start) &&
End.Equals(other.End) &&
(
Payload == null && other.Payload == null ||
Payload != null && Payload.Equals(other.Payload)
));
}
public static LocalDateTime?MaxStart(LocalInterval interval1, LocalInterval interval2)
{
if (!interval1.Start.HasValue)
{
return(interval2.Start);
}
if (!interval2.Start.HasValue)
{
return(interval1.Start);
}
return(Max(interval1.Start.Value, interval2.Start.Value));
}
public static LocalDateTime?MinEnd(LocalInterval interval1, LocalInterval interval2)
{
if (!interval1.End.HasValue)
{
return(interval2.End);
}
if (!interval2.End.HasValue)
{
return(interval1.End);
}
return(Min(interval1.End.Value, interval2.End.Value));
}
public static IEnumerable <LocalInterval> Fragment(IEnumerable <LocalInterval> intervals1, IEnumerable <LocalInterval> intervals2)
{
var int1List = intervals1.ToList();
var int2List = intervals2.ToList();
var aggregate = int1List.Select(i => new Edge(i, i.Start, true))
.Concat(int1List.Select(i => new Edge(i, i.End)))
.Concat(int2List.Select(i => new Edge(i, i.Start, true)))
.Concat(int2List.Select(i => new Edge(i, i.End)))
.OrderBy(dateTime => dateTime.Value)
.Aggregate(new IntervalAggregator(), (agg, edge) =>
{
if (agg.Fragments.Count > 0 && agg.Intervals.Count > 0)
{
var close = agg.Fragments.Where(f => !f.End.HasValue).ToList();
for (int i = 0; i < close.Count; i++)
{
close[i] = new LocalInterval(close[i].Start, edge.Value, close[i].Payload);
}
agg.Fragments = agg.Fragments.Where(f => f.End.HasValue).Concat(close).ToList();
}
if (edge.IsStart)
{
agg.Intervals.Add(edge.Interval);
}
else
{
agg.Intervals.Remove(edge.Interval);
}
if (agg.Intervals.Count > 0)
{
agg.Intervals
.Where(i => i.Payload != null)
.GroupBy(i => i.Payload.GetType())
.ToList()
.ForEach(grp =>
{
var total = grp.Aggregate((TimePayloadBase) new NullPayload(), (_total, interval) => _total + interval.Payload);
agg.Fragments.Add(new LocalInterval(edge.Value, null, total));
});
}
return(agg);
});
return(aggregate.Fragments.Where(f => f.Start != f.End));
}
public static List <LocalInterval> Not(LocalInterval interval)
{
var neg = new List <LocalInterval>();
if (interval.Start.HasValue)
{
neg.Add(new LocalInterval(null, interval.Start, interval.Payload));
}
if (interval.End.HasValue)
{
neg.Add(new LocalInterval(interval.End, null, interval.Payload));
}
return(neg);
}
public static IEnumerable <LocalInterval> MergeTouching(IEnumerable <LocalInterval> intervals)
{
return(intervals
.OrderBy(i => i.Start)
.Aggregate(new List <LocalInterval>(), (result, interval) =>
{
var last = result.LastOrDefault();
var toAdd = interval.Clone();
if (last != null &&
AreTouching(last, toAdd) &&
(
last.Payload == null && toAdd.Payload == null ||
last.Payload != null && last.Payload.Equals(toAdd.Payload)
))
{
result = result.Take(result.Count - 1).ToList();
toAdd = new LocalInterval(MinStart(last, toAdd), MaxEnd(last, toAdd), toAdd.Payload?.Clone(), toAdd.Name);
}
result.Add(toAdd);
return result;
}));
}
public Edge(LocalInterval interval, LocalDateTime?value, bool isStart = false)
{
Interval = interval;
Value = value;
IsStart = isStart;
}
public static IEnumerable <LocalInterval> Intersection(IEnumerable <LocalInterval> intervals, LocalInterval interval)
{
return(Intersection(intervals, new List <LocalInterval> {
interval
}));
}
public static bool Overlap(LocalInterval interval1, LocalInterval interval2)
{
return((interval1.Start == null || interval2.End == null || interval1.Start < interval2.End) &&
(interval2.Start == null || interval1.End == null || interval1.End >= interval2.Start));
}
private static IEnumerable <LocalDateTime?> ToDates(LocalInterval interval)
{
yield return(interval.Start);
yield return(interval.End);
}