/// <summary>
/// Calls <see cref="ClientInterestArea.OnItemSubscribed">ClientInterestArea.OnItemSubscribed</see> and sends event <see cref="ItemSubscribed"/> to the client.
/// </summary>
/// <param name="snapshot">
/// The item snapshot.
/// </param>
protected override void OnItemSubscribed(ItemSnapshot snapshot)
{
base.OnItemSubscribed(snapshot);
var mmoSnapshot = (MmoItemSnapshot)snapshot;
var item = snapshot.Source;
var subscribeEvent = new ItemSubscribed
{
ItemId = item.Id,
ItemType = item.Type,
Position = mmoSnapshot.Coordinate,
PropertiesRevision = snapshot.PropertiesRevision,
InterestAreaId = this.Id,
Rotation = mmoSnapshot.Rotation
};
#region PopBloop
var mmoItem = (MmoItem)item;
if (mmoItem != null)
{
subscribeEvent.AvatarName = mmoItem.AvatarName;
subscribeEvent.Animation = mmoItem.Animation;
subscribeEvent.AnimationSpeed = mmoItem.AnimationSpeed;
subscribeEvent.AnimationWrap = mmoItem.AnimationWrap;
}
else
{
subscribeEvent.AvatarName = "Unknown";
}
#endregion
var eventData = new EventData((byte)EventCode.ItemSubscribed, subscribeEvent);
this.Peer.SendEvent(eventData, new SendParameters { ChannelId = Settings.ItemEventChannel });
}
/// <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>
/// Does nothing.
/// Called after subscribing an <see cref = "Item" />, either manually (<see cref = "SubscribeItem">SubscribeItem</see>) or automatically.
/// </summary>
/// <param name = "itemSnapshot">
/// The hearbeat message from the subscribed item.
/// </param>
/// <remarks>
/// Thread Safety: This method does not provide thread safe access to the <see cref = "Item" />.
/// Instead of accessing the item directly override <see cref = "Item.GetItemSnapshot" /> subsclass that contains a copy of the required values.
/// </remarks>
/// <remarks>
/// Thread Safety: This method is executed while having an exclusive lock on <see cref = "SyncRoot" />.
/// </remarks>
protected virtual void OnItemSubscribed(ItemSnapshot itemSnapshot)
{
}
/// <summary>
/// Subscribes the <see cref = "PeerBase" /> to the item's <see cref = "Item.EventChannel" />.
/// </summary>
/// <param name = "itemSnapshot">
/// The item snapshot message.
/// </param>
protected override void OnItemSubscribed(ItemSnapshot itemSnapshot)
{
Item item = itemSnapshot.Source;
// publish event messages
IDisposable messageReceiver = item.EventChannel.Subscribe(this.fiber, this.SubscribedItem_OnItemEvent);
this.eventChannelSubscriptions.Add(item, messageReceiver);
}
