private static OperationResponse ItemOperationAddInterestArea(Item item, AddInterestArea operation, InterestArea interestArea)
{
if (item.Disposed)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
lock (interestArea.SyncRoot)
{
interestArea.AttachToItem(item);
interestArea.ViewDistanceEnter = operation.ViewDistanceEnter;
interestArea.ViewDistanceExit = operation.ViewDistanceExit;
interestArea.UpdateInterestManagement();
}
operation.OnComplete();
return operation.GetOperationResponse(MethodReturnValue.Ok);
}
/// <summary>
/// Handles operation AddInterestArea: Creates a new InterestArea and optionally attaches it to an existing Item.
/// </summary>
public OperationResponse OperationAddInterestArea(PeerBase peer, OperationRequest request, SendParameters sendParameters)
{
var operation = new AddInterestArea(peer.Protocol, request);
if (!operation.IsValid)
{
return new OperationResponse(request.OperationCode) { ReturnCode = (int)ReturnCode.InvalidOperationParameter, DebugMessage = operation.GetErrorMessage() };
}
operation.OnStart();
InterestArea interestArea;
if (this.TryGetInterestArea(operation.InterestAreaId, out interestArea))
{
return operation.GetOperationResponse((int)ReturnCode.InterestAreaAlreadyExists, "InterestAreaAlreadyExists");
}
interestArea = new ClientInterestArea(this.Peer, operation.InterestAreaId, this.World);
this.AddInterestArea(interestArea);
// attach interestArea to item
if (string.IsNullOrEmpty(operation.ItemId) == false)
{
Item item;
bool actorItem = this.TryGetItem(operation.ItemId, out item);
if (actorItem)
{
// we are already in the item thread, invoke directly
return ItemOperationAddInterestArea(item, operation, interestArea);
}
else
{
if (this.World.ItemCache.TryGetItem(operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
else
{
// second parameter (peer) allows us to send an error event to the client (in case of an error)
item.Fiber.Enqueue(() => this.ExecItemOperation(() => ItemOperationAddInterestArea(item, operation, interestArea), sendParameters));
// send response later
return null;
}
}
}
else
{
// free floating interestArea
lock (interestArea.SyncRoot)
{
interestArea.Position = operation.Position;
interestArea.ViewDistanceEnter = operation.ViewDistanceEnter;
interestArea.ViewDistanceExit = operation.ViewDistanceExit;
interestArea.UpdateInterestManagement();
}
return operation.GetOperationResponse(MethodReturnValue.Ok);
}
}