public MessageEventResult ProcessMessage(MessageEvent messageEvent)
{
IStateFactory stateFactory = StateFactory;
if (!_stateStorage.TryGetValue(messageEvent.Id, out IState currentState))
{
currentState = stateFactory.GetInitialState();
SetState(messageEvent.Id, currentState);
}
MessageEventResult result;
try
{
result = currentState.HandleEvent(messageEvent);
if (!FinalStateReached(messageEvent.Id))
{
IState nextState = stateFactory.GetNextState(currentState);
SetState(messageEvent.Id, nextState);
}
else
{
SetState(messageEvent.Id, stateFactory.GetInitialState());
}
}
catch (PreviousStateUserAnswerException prevStateAnswerEx)
{
result = new MessageEventResult(prevStateAnswerEx.Message);
}
return(result);
}