/// <summary>
/// Handles operation <see cref = "RaiseGenericEvent" />: Sends event <see cref = "ItemGeneric" /> to an <see cref = "Item" /> owner or the subscribers of an <see cref = "Item" />'s <see cref = "Item.EventChannel" />.
/// </summary>
/// <param name = "peer">
/// The client peer.
/// </param>
/// <param name = "request">
/// The request.
/// </param>
/// <param name = "sendParameters">
/// The send Parameters.
/// </param>
/// <returns>
/// Null or an <see cref = "OperationResponse" /> with error code <see cref = "ReturnCode.ItemNotFound" />.
/// </returns>
public OperationResponse OperationRaiseGenericEvent(PeerBase peer, OperationRequest request, SendParameters sendParameters)
{
var operation = new RaiseGenericEvent(peer.Protocol, request);
if (!operation.IsValid)
{
return new OperationResponse(request.OperationCode) { ReturnCode = (int)ReturnCode.InvalidOperationParameter, DebugMessage = operation.GetErrorMessage() };
}
operation.OnStart();
Item item;
bool actorItem = true;
if (false == operation.ItemType.HasValue || string.IsNullOrEmpty(operation.ItemId))
{
item = this.Avatar;
// set return values
operation.ItemType = item.Type;
operation.ItemId = item.Id;
}
else if (this.TryGetItem(operation.ItemType.Value, operation.ItemId, out item) == false)
{
if (this.World.ItemCache.TryGetItem(operation.ItemType.Value, operation.ItemId, out item) == false)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
actorItem = false;
}
if (actorItem)
{
// we are already in the item thread, invoke directly
return ItemOperationRaiseGenericEvent(item, operation, sendParameters);
}
// second parameter (peer) allows us to send an error event to the client (in case of an error)
item.Fiber.Enqueue(() => this.ExecItemOperation(() => ItemOperationRaiseGenericEvent(item, operation, sendParameters), sendParameters));
// operation continued later
return null;
}
/// <summary>
/// The operation raise generic event.
/// </summary>
/// <param name = "item">
/// The mmo item.
/// </param>
/// <param name = "operation">
/// The operation.
/// </param>
/// <param name = "sendParameters">
/// The send Parameters.
/// </param>
/// <returns>
/// Ok or ItemNotFound
/// </returns>
private static OperationResponse ItemOperationRaiseGenericEvent(Item item, RaiseGenericEvent operation, SendParameters sendParameters)
{
if (item.Disposed)
{
return operation.GetOperationResponse((int)ReturnCode.ItemNotFound, "ItemNotFound");
}
var eventInstance = new ItemGeneric
{
ItemId = item.Id, ItemType = item.Type, CustomEventCode = operation.CustomEventCode, EventData = operation.EventData
};
var eventData = new EventData((byte)EventCode.ItemGeneric, eventInstance);
sendParameters.Unreliable = (Reliability)operation.EventReliability == Reliability.Unreliable;
sendParameters.ChannelId = Settings.ItemEventChannel;
switch (operation.EventReceiver)
{
case (byte)EventReceiver.ItemOwner:
{
if (((IMmoItem)item).ReceiveEvent(eventData, sendParameters) == false)
{
string debugMessage = string.Format("Target item {0}/{1} could not receive event", item.Type, item.Id);
return operation.GetOperationResponse((int)ReturnCode.InvalidOperation, debugMessage);
}
break;
}
case (byte)EventReceiver.ItemSubscriber:
{
var message = new ItemEventMessage(item, eventData, sendParameters);
item.EventChannel.Publish(message);
break;
}
default:
{
return operation.GetOperationResponse((int)ReturnCode.ParameterOutOfRange, "Invalid EventReceiver " + operation.EventReceiver);
}
}
// no response
operation.OnComplete();
return null;
}