public MultiCollectionGroup(CollectionWithItems collectionWithItems)
{
if (collectionWithItems.UseCustomOrder)
{
if (collectionWithItems.MediaItems.Count > 0)
{
First = collectionWithItems.MediaItems.Head();
Additional = collectionWithItems.MediaItems.Tail().ToList();
}
else
{
throw new InvalidOperationException("Collection has no items");
}
}
else
{
switch (collectionWithItems.PlaybackOrder)
{
case PlaybackOrder.Chronological:
var sortedItems = collectionWithItems.MediaItems.OrderBy(identity, new ChronologicalMediaComparer())
.ToList();
First = sortedItems.Head();
Additional = sortedItems.Tail().ToList();
break;
default:
throw new NotSupportedException(
$"Unsupported MultiCollection PlaybackOrder: {collectionWithItems.PlaybackOrder}");
}
}
}
private static IList <Option <MediaItem> > OrderItems(CollectionWithItems collectionWithItems)
{
if (collectionWithItems.UseCustomOrder)
{
return(collectionWithItems.MediaItems.Map(Some).ToList());
}
return(collectionWithItems.MediaItems
.OrderBy(identity, new ChronologicalMediaComparer())
.Map(Some)
.ToList());
}
