public async void HandleMessage(Client.Client sender, PacketReader stream)
{
if (sender == null)
{
throw new ArgumentNullException(nameof(sender));
}
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
try
{
int id = stream.ReadInt();
//Projection against receiving the message again(which would be a client problem).
if (sender.TryGetControlledNpc(out NpcInst controlledNpc))
{
if (_Service.TryGetMapping(controlledNpc, out CharacterMapping characterMapping))
{
characterMapping.Character.RemoveMapping();
}
else
{
controlledNpc.Despawn();
}
_Log.Error($"A client send a {SupportedMessage} even through it does already control a npc. Trying to disconnect the player and remove the npc to get back into a defined state");
sender.Disconnect();
return;
}
//Get and map the selected character of the client.
if (_AuthenticationService.TryGetSession(sender, out Session session))
{
IList <Character> list = await _Service.GetAccountOwnedCharactersAsync(session.Account);
Character selectedChar = list.FirstOrDefault(c => c.CharacterId == id);
bool success = true;
JoinGameFailedReason failureReason = JoinGameFailedReason.None;
if (selectedChar == null)
{
//Invalid character id... return an error
success = false;
failureReason = JoinGameFailedReason.InvalidCharacterId;
}
else
{
//Save the active character(this causes a database access).
await _Service.SetAccountActiveCharacterAsync(session.Account, selectedChar);
if (!selectedChar.TryGetMapping(out CharacterMapping mapping))
{
mapping = selectedChar.SpawnAndMap();
}
if (mapping.CharacterNpc.TryGetControllingClient(out Client.Client controllingClient))
{
//Character is in use by someone else.
success = false;
failureReason = JoinGameFailedReason.CharacterInUse;
}
else
{
sender.SetControl(mapping.CharacterNpc);
}
}
//Send the result to the client.
using (var packet = _PacketWriterPool.GetScriptMessageStream(ScriptMessages.JoinGameResult))
{
packet.Write(success);
//Write the error code.
if (!success)
{
packet.Write((byte)failureReason);
}
sender.SendScriptMessage(packet, NetPriority.Medium, NetReliability.Reliable);
}
}
}
catch (Exception e)
{
_Log.Error($"Something went wrong while handling a '{SupportedMessage}' script message. Disconnecting the client to get back into a defined state. Exception: {e}");
//Disconnect the client to get back into a defined state.
sender.Disconnect();
}
}