/// <summary>
/// The auto unsubscribe distant item.
/// </summary>
/// <param name = "subscription">
/// The subscription.
/// </param>
private void AutoUnsubscribeDistantItem(ItemAutoSubscription subscription)
{
////IArea area = this.World.Area.GetAreaWithRadius(this.Position, this.ViewDistanceExit);
////var regions = this.World.GetRegions(area);
////if (regions.Contains(subscription.WorldRegion) == false)
if (false == this.currentRegionOuterFocus.Contains(subscription.ItemPosition))
{
this.AutoUnsubscribeItem(subscription);
}
}
/// <summary>
/// Receives the <see cref = "ItemSnapshot" />.
/// auto subscribes item if necessary.
/// </summary>
/// <param name = "message">
/// The message.
/// </param>
internal void ReceiveItemSnapshot(ItemSnapshot message)
{
lock (this.SyncRoot)
{
// auto subscribe item?
if (this.AutoSubscribeItem(message.Source) == false)
{
return;
}
ItemAutoSubscription subscription;
// already subscribed
if (this.autoManagedItemSubscriptions.TryGetValue(message.Source, out subscription))
{
// dropped out of world, unsubscribe
if (message.WorldRegion == null)
{
this.AutoUnsubscribeItem(subscription);
return;
}
// update position
subscription.ItemPosition = message.Position;
subscription.WorldRegion = message.WorldRegion;
return;
}
// already subscribed
if (this.manualManagedItemSubscriptions.ContainsKey(message.Source))
{
return;
}
// item not in view
if (message.WorldRegion == null || this.subscribedWorldRegions.ContainsKey(message.WorldRegion) == false)
{
return;
}
// unsubscribe if item is disposed
IDisposable disposeListener = message.Source.DisposeChannel.Subscribe(this.subscriptionManagementFiber, this.AutoSubscribedItem_OnItemDisposed);
// unsubscribe if item moves out of range
IDisposable itemPositionEvaluator = message.Source.PositionUpdateChannel.SubscribeToLast(
this.subscriptionManagementFiber, this.AutoSubscribedItem_OnItemPosition, ItemAutoUnsubcribeDelayMilliseconds);
var itemSubscription = new ItemAutoSubscription(
message.Source, message.Position, message.WorldRegion, new UnsubscriberCollection(disposeListener, itemPositionEvaluator));
this.autoManagedItemSubscriptions.Add(message.Source, itemSubscription);
this.OnItemSubscribed(message);
}
}
/// <summary>
/// The auto unsubscribe item.
/// </summary>
/// <param name = "subscription">
/// The subscription.
/// </param>
private void AutoUnsubscribeItem(ItemAutoSubscription subscription)
{
subscription.Dispose();
this.autoManagedItemSubscriptions.Remove(subscription.Item);
this.OnItemUnsubscribed(subscription.Item);
}
/// <summary>
/// The auto unsubscribe distant item.
/// </summary>
/// <param name = "subscription">
/// The subscription.
/// </param>
private void AutoUnsubscribeDistantItem(ItemAutoSubscription subscription)
{
////IArea area = this.World.Area.GetAreaWithRadius(this.Position, this.ViewDistanceExit);
////var regions = this.World.GetRegions(area);
////if (regions.Contains(subscription.WorldRegion) == false)
if (false == this.currentRegionOuterFocus.Contains(subscription.ItemPosition))
{
this.AutoUnsubscribeItem(subscription);
}
}
/// <summary>
/// Receives the <see cref = "ItemSnapshot" />.
/// auto subscribes item if necessary.
/// </summary>
/// <param name = "message">
/// The message.
/// </param>
internal void ReceiveItemSnapshot(ItemSnapshot message)
{
lock (this.SyncRoot)
{
// auto subscribe item?
if (this.AutoSubscribeItem(message.Source) == false)
{
return;
}
ItemAutoSubscription subscription;
// already subscribed
if (this.autoManagedItemSubscriptions.TryGetValue(message.Source, out subscription))
{
// dropped out of world, unsubscribe
if (message.WorldRegion == null)
{
this.AutoUnsubscribeItem(subscription);
return;
}
// update position
subscription.ItemPosition = message.Position;
subscription.WorldRegion = message.WorldRegion;
return;
}
// already subscribed
if (this.manualManagedItemSubscriptions.ContainsKey(message.Source))
{
return;
}
// item not in view
if (message.WorldRegion == null || this.subscribedWorldRegions.ContainsKey(message.WorldRegion) == false)
{
return;
}
// unsubscribe if item is disposed
IDisposable disposeListener = message.Source.DisposeChannel.Subscribe(this.subscriptionManagementFiber, this.AutoSubscribedItem_OnItemDisposed);
// unsubscribe if item moves out of range
IDisposable itemPositionEvaluator = message.Source.PositionUpdateChannel.SubscribeToLast(
this.subscriptionManagementFiber, this.AutoSubscribedItem_OnItemPosition, ItemAutoUnsubcribeDelayMilliseconds);
var itemSubscription = new ItemAutoSubscription(
message.Source, message.Position, message.WorldRegion, new UnsubscriberCollection(disposeListener, itemPositionEvaluator));
this.autoManagedItemSubscriptions.Add(message.Source, itemSubscription);
this.OnItemSubscribed(message);
}
}
/// <summary>
/// The auto unsubscribe item.
/// </summary>
/// <param name = "subscription">
/// The subscription.
/// </param>
private void AutoUnsubscribeItem(ItemAutoSubscription subscription)
{
subscription.Dispose();
this.autoManagedItemSubscriptions.Remove(subscription.Item);
this.OnItemUnsubscribed(subscription.Item);
}
