public TimeMachineState Execute(TimeMachineState previousState, IAction action)
{
if (action is ResumeTimeMachineAction)
{
return(previousState
.WithIsPaused(false)
.WithStates(previousState.States.Take(previousState.Position + 1).ToImmutableList())
.WithActions(previousState.Actions.Take(previousState.Position).ToImmutableList()));
}
if (action is PauseTimeMachineAction)
{
return(previousState
.WithIsPaused(true));
}
if (action is SetTimeMachinePositionAction)
{
return(previousState
.WithPosition(((SetTimeMachinePositionAction)action).Position)
.WithIsPaused(true));
}
if (previousState.IsPaused)
{
return(previousState);
}
var innerState = _reducer(previousState.States.Last(), action);
return(previousState
.WithStates(previousState.States.Add(innerState))
.WithActions(previousState.Actions.Add(action))
.WithPosition(previousState.Position + 1));
}
public TimeMachineState(TimeMachineState other)
{
Actions = other.Actions;
States = other.States;
Position = other.Position;
IsPaused = other.IsPaused;
}
public TimeMachineState Execute(TimeMachineState previousState, IAction action)
{
if(action is ResumeTimeMachineAction)
{
return previousState
.WithIsPaused(false)
.WithStates(previousState.States.Take(previousState.Position + 1).ToImmutableList())
.WithActions(previousState.Actions.Take(previousState.Position).ToImmutableList());
}
if(action is PauseTimeMachineAction)
{
return previousState
.WithIsPaused(true);
}
if(action is SetTimeMachinePositionAction)
{
return previousState
.WithPosition(((SetTimeMachinePositionAction)action).Position)
.WithIsPaused(true);
}
if (previousState.IsPaused)
{
return previousState;
}
var innerState = _reducer(previousState.States.Last(), action);
return previousState
.WithStates(previousState.States.Add(innerState))
.WithActions(previousState.Actions.Add(action))
.WithPosition(previousState.Position + 1);
}
public TimeMachineState(TimeMachineState other)
{
Actions = other.Actions;
States = other.States;
Position = other.Position;
IsPaused = other.IsPaused;
}
private TState Unlift(TimeMachineState state)
{
return((TState)state.States[state.Position]);
}