private static InternalState <TInternalState> Execute <TInternalState, TEvent>(TEvent evnt,
IMachineState <TInternalState> internalState,
MachineConfiguration <TInternalState> config,
InternalState <TInternalState> finalTransitionState,
InternalState <TInternalState> currentState,
Func <string, InternalState <TInternalState> > lookup)
{
var handler = currentState.Handlers[evnt.GetType()];
Action <string> log =
str => config.Logger($"SM:{config.Name}:{config.GetUniqueId(internalState.CurrentInternalState)} = State: {currentState.Name} - {str}");
foreach (var action in handler.TransistionDefinitions)
{
if (action.GuardCondition(internalState.CurrentInternalState, evnt))
{
action.Action?.Invoke(internalState.CurrentInternalState, evnt, log);
if (action.TransitionTo != null)
{
finalTransitionState = finalTransitionState ?? lookup(action.TransitionTo);
}
}
}
return(finalTransitionState);
}
private static InternalState <TInternalState> TransitionTo <TInternalState>(
object evnt
, IMachineState <TInternalState> machineState
, IReadOnlyDictionary <InternalState <TInternalState>, InternalState <TInternalState> > relations
, InternalState <TInternalState> transitionToState
, IEnumerable <Func <object, object> > eventInterceptors
, bool exitInnerStatesFirst
, MachineConfiguration <TInternalState> config
, Func <string, InternalState <TInternalState> > lookup)
{
config.Logger(string.Format("SM:{0}:{1} = State: {2} -> {3} on ^{4} = '{5}'"
, config.Name
, config.GetUniqueId(machineState.CurrentInternalState)
, machineState.CurrentState.Name
, transitionToState.Name
, evnt.GetType().Name
, config.LogEvents(evnt)));
var _currentStates = Misc <TInternalState> .FindAllStates(relations, machineState.CurrentState);
var _nextStates = Misc <TInternalState> .FindAllStates(relations, transitionToState);
while (machineState.StateHistory.ContainsKey(transitionToState))
{
var nextTransitionToState = machineState.StateHistory[transitionToState];
transitionToState = nextTransitionToState;
_nextStates.Add(nextTransitionToState);
}
var entryConditionsToRun = _nextStates.Except(_currentStates);
var exitConditionsToRun = _currentStates.Except(_nextStates);
if (exitInnerStatesFirst)
{
entryConditionsToRun.Reverse();
exitConditionsToRun.Reverse();
}
// Dispatch and do not transition...
var newState = DispatchToStates(new Events.ExitEvent(), machineState, exitConditionsToRun, eventInterceptors, config, lookup);
machineState.ChangeState(_nextStates.Last());
// Dispath entry event - transition if neccesary and do not transition...
newState = DispatchToStates(new Events.EntryEvent(), machineState, entryConditionsToRun, eventInterceptors, config, lookup);
if (newState != null)
{
transitionToState = TransitionTo(evnt, machineState, relations, newState, eventInterceptors, exitInnerStatesFirst, config, lookup);
}
return(transitionToState);
}
