/// <summary>
/// Returns all occurrences of components of type T that start within the date range provided.
/// All components occurring between <paramref name="startTime"/> and <paramref name="endTime"/>
/// will be returned.
/// </summary>
/// <param name="startTime">The starting date range</param>
/// <param name="endTime">The ending date range</param>
public virtual HashSet <Occurrence> GetOccurrences <T>(IDateTime startTime, IDateTime endTime) where T : IRecurringComponent
{
var occurrences = new HashSet <Occurrence>(RecurringItems.OfType <T>().SelectMany(recurrable => recurrable.GetOccurrences(startTime, endTime)));
occurrences.ExceptWith(
occurrences.Where(o => o.Source is IUniqueComponent)
.Where(o => o.Source.RecurrenceId != null)
.Where(o => o.Source.RecurrenceId.Equals(o.Period.StartTime)));
return(occurrences);
}
/// <summary>
/// Returns all occurrences of components of type T that start within the date range provided.
/// All components occurring between <paramref name="startTime"/> and <paramref name="endTime"/>
/// will be returned.
/// </summary>
/// <param name="startTime">The starting date range</param>
/// <param name="endTime">The ending date range</param>
public virtual HashSet <Occurrence> GetOccurrences <T>(IDateTime startTime, IDateTime endTime) where T : IRecurringComponent
{
var occurrences = new HashSet <Occurrence>(RecurringItems
.OfType <T>()
.SelectMany(recurrable => recurrable.GetOccurrences(startTime, endTime)));
var removeOccurrencesQuery = occurrences
.Where(o => o.Source is UniqueComponent)
.GroupBy(o => ((UniqueComponent)o.Source).Uid)
.SelectMany(group => group
.Where(o => o.Source.RecurrenceId != null)
.SelectMany(occurrence => group.
Where(o => o.Source.RecurrenceId == null && occurrence.Source.RecurrenceId.Date.Equals(o.Period.StartTime.Date))));
occurrences.ExceptWith(removeOccurrencesQuery);
return(occurrences);
}