/// <summary>
/// Subscribes the player on the item's event channel and notifies the client
/// </summary>
protected override void OnMmoObjectSubscribed(MmoObjectSnapshot snapshot)
{
var mmoObject = snapshot.Source;
// publish event messages
var eventSubscription = mmoObject.EventChannel.Subscribe(this.fiber, this.SubscribedItem_OnGameObjectEvent);
this.eventChannelSubscriptions.Add(mmoObject, eventSubscription);
var eventSubscribed = new ObjectSubscribed
{
ObjectId = mmoObject.Guid,
Position = snapshot.Coordinate,
Orientation = snapshot.Rotation.Y,
};
var objectFlags = mmoObject.Flags;
if ((objectFlags & MmoObjectFlags.HasProperties) == MmoObjectFlags.HasProperties)
{
eventSubscribed.Revision = snapshot.Revision;
if ((objectFlags & MmoObjectFlags.SendPropertiesOnSubscribe) == MmoObjectFlags.SendPropertiesOnSubscribe)
{
lock (mmoObject) // locking is important
eventSubscribed.Properties = mmoObject.GetProperties();
}
}
switch ((ObjectType)mmoObject.Guid.Type)
{
case ObjectType.Gameobject:
case ObjectType.Npc:
case ObjectType.Dynamic:
{
var interestFlags = this.Owner.GetFlags(mmoObject);
if (interestFlags != InterestFlags.None)
{
eventSubscribed.Flags = (int)interestFlags;
}
}
break;
}
this.receiver.SendEvent(eventSubscribed, new MessageParameters {
ChannelId = PeerSettings.MmoObjectEventChannel
});
this.Owner.OnSubscribe(mmoObject);
}
/// <summary>
/// Receives the <see cref="MmoObjectSnapshot"/> auto subscribes item if necessary.
/// </summary>
internal void ReceiveMmoObjectSnapshot(MmoObjectSnapshot message)
{
lock (SyncRoot)
{
// auto subscribe item?
if (CanAutoSubscribeMmoObject(message.Source) == false)
{
return;
}
MmoObjectAutoSubscription existingSubscription;
if (autoManagedItemSubscriptions.TryGetValue(message.Source, out existingSubscription))
{
// dropped out of world, unsubscribe
if (message.WorldRegion == null)
{
this.AutoUnsubscribeMmoObject(existingSubscription);
return;
}
// update position
existingSubscription.Position = message.Position;
existingSubscription.WorldRegion = message.WorldRegion;
return;
}
// item not in view
if (message.WorldRegion == null || this.subscribedWorldRegions.ContainsKey(message.WorldRegion) == false)
{
return;
}
// unsubscribe if item is disposed
var disposalSubscription = message.Source.DisposeChannel.Subscribe(this.subscriptionManagementFiber, this.AutoSubscribedMmoObject_OnMmoObjectDisposed);
// unsubscribe if item moves out of range
var positionSubscription = message.Source.PositionUpdateChannel.SubscribeToLast(this.subscriptionManagementFiber,
this.AutoSubscribedMmoObject_OnMmoObjectPosition,
GameObjectAutoUnsubcribeDelayMilliseconds);
var itemSubscription = new MmoObjectAutoSubscription(message.Source, message.Position, message.WorldRegion,
new UnsubscriberCollection(disposalSubscription, positionSubscription));
this.autoManagedItemSubscriptions.Add(message.Source, itemSubscription);
this.OnMmoObjectSubscribed(message);
}
}
/// <summary>
/// Does nothing.
/// Called after subscribing an <see cref = "MmoObject" />.
/// </summary>
protected virtual void OnMmoObjectSubscribed(MmoObjectSnapshot itemSnapshot)
{
}
