public IQueryable <ActivityView> Handle(ActivitiesByDateRange query)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
IQueryable <ActivityView> activityViews = new EnumerableQuery <ActivityView>();
try
{
var possibleNullView = _projector.BeginReadView();
if (possibleNullView != null)
{
var view = possibleNullView.AsQueryable();
activityViews = view.Where(a =>
(
/* and, include activities that are undated... */
(!query.NoUndated || (!a.StartsOn.HasValue && !a.EndsOn.HasValue &&
(!a.OnGoing.HasValue || !a.OnGoing.Value))) &&
/* and */
(
/* On-going only */
(!a.StartsOn.HasValue && !a.EndsOn.HasValue &&
(a.OnGoing.HasValue && a.OnGoing.Value)) ||
/* End date only (with future flag) */
(!a.StartsOn.HasValue &&
(a.EndsOn.HasValue && (a.EndsOn.Value >= query.FromDate) &&
(query.IncludeFuture || (a.EndsOn < query.ToDate))) &&
(!a.OnGoing.HasValue || !a.OnGoing.Value)) ||
/* Start date and on-going */
((a.StartsOn.HasValue && (a.StartsOn.Value < query.ToDate)) &&
!a.EndsOn.HasValue && (a.OnGoing.HasValue && a.OnGoing.Value)) ||
/* Start date only */
((a.StartsOn.HasValue &&
((a.StartsOn.Value >= query.FromDate) &&
(a.StartsOn.Value < query.ToDate))) && !a.EndsOn.HasValue &&
(!a.OnGoing.HasValue || !a.OnGoing.Value)) ||
/* Start date and end date (with future flag) */
((a.StartsOn.HasValue && (a.StartsOn.Value >= query.FromDate))) &&
(a.EndsOn.HasValue && (query.IncludeFuture || (a.EndsOn < query.ToDate))) &&
(!a.OnGoing.HasValue || !a.OnGoing.Value))
)
);
}
}
finally
{
_projector.EndReadView();
}
return(activityViews.AsQueryable());
}