/// <summary>
/// Handles operation <see cref = "AddInterestArea" />: Creates a new <see cref = "InterestArea" /> and optionally attaches it to an existing <see cref = "Item" />.
/// </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" /> or <see cref = "ReturnCode.InterestAreaAlreadyExists" />.
/// If the <see cref = "InterestArea" /> is supposed to be attached to an <see cref = "Item" /> error code <see cref = "ReturnCode.ItemNotFound" /> could be returned.
/// </returns>
/// <remarks>
/// The <see cref = "InterestArea" /> is created even if error code <see cref = "ReturnCode.ItemNotFound" /> is returned.
/// </remarks>
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 MmoClientInterestArea(this.Peer, operation.InterestAreaId, this.World);
this.AddInterestArea(interestArea);
// attach interestArea to item
Item item;
if (operation.ItemType.HasValue && string.IsNullOrEmpty(operation.ItemId) == false)
{
IWorld world = this.World;
bool actorItem = this.TryGetItem(operation.ItemType.Value, operation.ItemId, out item);
if (actorItem == false)
{
if (world.ItemCache.TryGetItem(operation.ItemType.Value, operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
}
if (actorItem)
{
// we are already in the item thread, invoke directly
return ItemOperationAddInterestArea(item, operation, interestArea);
}
// 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;
}
// free floating interestArea
if (operation.Position != null)
{
lock (interestArea.SyncRoot)
{
interestArea.Position = operation.Position.ToVector();
interestArea.ViewDistanceEnter = operation.ViewDistanceEnter.ToVector();
interestArea.ViewDistanceExit = operation.ViewDistanceExit.ToVector();
interestArea.UpdateInterestManagement();
}
}
return operation.GetOperationResponse(MethodReturnValue.Ok);
}
/// <summary>
/// The operation add interest area.
/// </summary>
/// <param name = "item">
/// The mmo item.
/// </param>
/// <param name = "operation">
/// The operation.
/// </param>
/// <param name = "interestArea">
/// The interestArea.
/// </param>
/// <returns>
/// Ok or ItemNotFound
/// </returns>
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.ToVector();
interestArea.ViewDistanceExit = operation.ViewDistanceExit.ToVector();
interestArea.UpdateInterestManagement();
}
operation.OnComplete();
return operation.GetOperationResponse(MethodReturnValue.Ok);
}