/// <summary>
/// Handles operation <see cref = "DestroyItem" />: Destroys an existing <see cref = "MmoItem" />.
/// The <see cref = "MmoItem.Owner" /> must be this actor instance.
/// </summary>
/// <param name = "peer">
/// The client peer.
/// </param>
/// <param name = "request">
/// The request.
/// </param>
/// <param name = "sendParameters">
/// The send Parameters.
/// </param>
/// <returns>
/// An <see cref = "OperationResponse" /> with error code <see cref = "ReturnCode.Ok" />, <see cref = "ReturnCode.ItemNotFound" /> or <see cref = "ReturnCode.ItemAccessDenied" />.
/// </returns>
public OperationResponse OperationDestroyItem(PeerBase peer, OperationRequest request, SendParameters sendParameters)
{
var operation = new DestroyItem(peer.Protocol, request);
if (!operation.IsValid)
{
return new OperationResponse(request.OperationCode) { ReturnCode = (int)ReturnCode.InvalidOperationParameter, DebugMessage = operation.GetErrorMessage() };
}
operation.OnStart();
Item item;
bool actorItem = this.TryGetItem(operation.ItemType, operation.ItemId, out item);
if (actorItem == false)
{
IWorld world = this.World;
// search world cache just to see if item exists at all
if (world.ItemCache.TryGetItem(operation.ItemType, operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
}
if (actorItem)
{
// we are already in the item thread, invoke directly
return this.ItemOperationDestroy(item, operation);
}
// second parameter (peer) allows us to send an error event to the client (in case of an error)
// error ItemAccessDenied or ItemNotFound will be returned
item.Fiber.Enqueue(() => this.ExecItemOperation(() => this.ItemOperationDestroy(item, operation), sendParameters));
// operation is continued later
return null;
}
/// <summary>
/// The destroy.
/// </summary>
/// <param name = "item">
/// The mmo item.
/// </param>
/// <param name = "operation">
/// The operation.
/// </param>
/// <returns>
/// error code ok
/// </returns>
private OperationResponse ItemOperationDestroy(Item item, DestroyItem operation)
{
MethodReturnValue result = this.CheckAccess(item);
if (result)
{
item.Destroy();
item.Dispose();
this.RemoveItem(item);
item.World.ItemCache.RemoveItem(item.Type, item.Id);
var eventInstance = new ItemDestroyed { ItemId = item.Id, ItemType = item.Type };
var eventData = new EventData((byte)EventCode.ItemDestroyed, eventInstance);
this.Peer.SendEvent(eventData, new SendParameters { ChannelId = Settings.ItemEventChannel });
// no response, event is sufficient
operation.OnComplete();
return null;
}
return operation.GetOperationResponse(result);
}
