internal async Task FireInternalAsync(TTrigger trigger)
{
var triggerRep =
AwaitableStateConfigurationHelper <TState, TTrigger> .FindTriggerRepresentation(trigger,
CurrentStateRepresentation);
if (triggerRep == null)
{
HandleInvalidTrigger(trigger);
return;
}
if (CheckFlag(triggerRep.TransitionFlags, AwaitableStateTransitionFlag.TriggerPredicateReturnsTask))
{
var predicate = (Func <Task <bool> >)triggerRep.ConditionalTriggerPredicate;
if (predicate != null)
{
if (!await predicate())
{
HandleInvalidTrigger(trigger);
return;
}
}
}
else
{
var predicate = (Func <bool>)triggerRep.ConditionalTriggerPredicate;
if (predicate != null)
{
if (!predicate())
{
HandleInvalidTrigger(trigger);
return;
}
}
}
// Handle ignored trigger
if (triggerRep.NextStateRepresentation == null)
{
return;
}
// Catch invalid paramters before execution.
Action triggerAction = null;
Func <Task> triggerFunc = null;
if (CheckFlag(triggerRep.TransitionFlags, AwaitableStateTransitionFlag.TriggerActionReturnsTask))
{
try
{
triggerFunc = (Func <Task>)triggerRep.OnTriggerAction;
}
catch (InvalidCastException)
{
InvalidTriggerParameterException <TTrigger> .Throw(trigger);
return;
}
}
else
{
try
{
triggerAction = (Action)triggerRep.OnTriggerAction;
}
catch (InvalidCastException)
{
InvalidTriggerParameterException <TTrigger> .Throw(trigger);
return;
}
}
// Current exit
if (CheckFlag(CurrentStateRepresentation.TransitionFlags,
AwaitableStateTransitionFlag.ExitReturnsTask))
{
var exit = (Func <Task>)CurrentStateRepresentation.OnExitAction;
if (exit != null)
{
await exit();
}
}
else
{
var exit = (Action)CurrentStateRepresentation.OnExitAction;
if (exit != null)
{
exit();
}
}
// Trigger entry
if (triggerAction != null)
{
triggerAction();
}
else if (triggerFunc != null)
{
await triggerFunc();
}
// Next state entry
var nextStateRep = triggerRep.NextStateRepresentation;
if (CheckFlag(nextStateRep.TransitionFlags, AwaitableStateTransitionFlag.EntryReturnsTask))
{
var entry = (Func <Task>)nextStateRep.OnEntryAction;
if (entry != null)
{
await entry();
}
}
else
{
var entry = (Action)nextStateRep.OnEntryAction;
if (entry != null)
{
entry();
}
}
// Set states
var previousState = CurrentStateRepresentation.State;
CurrentStateRepresentation = nextStateRep;
// Raise event
var sc = StateChanged;
if (sc != null)
{
sc.Invoke(previousState, CurrentStateRepresentation.State);
}
}
public async Task FireAsync <TArgument>(ParameterizedTrigger <TTrigger, TArgument> parameterizedTrigger,
TArgument argument)
{
if (isRunning)
{
throw new InvalidOperationException("State cannot be changed while in transition");
}
if (IsEnabled)
{
isRunning = true;
var trigger = parameterizedTrigger.Trigger;
var triggerRep = AwaitableStateConfigurationHelper <TState, TTrigger> .FindTriggerRepresentation(trigger,
currentStateRepresentation);
if (triggerRep == null)
{
HandleInvalidTrigger(trigger);
return;
}
if (CheckFlag(triggerRep.TransitionFlags, AwaitableStateTransitionFlag.TriggerPredicateReturnsTask))
{
var predicate = (Func <Task <bool> >)triggerRep.ConditionalTriggerPredicate;
if (predicate != null)
{
if (!await predicate())
{
HandleInvalidTrigger(trigger);
return;
}
}
}
else
{
var predicate = (Func <bool>)triggerRep.ConditionalTriggerPredicate;
if (predicate != null)
{
if (!predicate())
{
HandleInvalidTrigger(trigger);
return;
}
}
}
// Handle ignored trigger
if (triggerRep.NextStateRepresentation == null)
{
return;
}
// Catch invalid paramters before execution.
Action <TArgument> triggerAction = null;
Func <TArgument, Task> triggerFunc = null;
if (CheckFlag(triggerRep.TransitionFlags, AwaitableStateTransitionFlag.TriggerActionReturnsTask))
{
try
{
triggerFunc = (Func <TArgument, Task>)triggerRep.OnTriggerAction;
}
catch (InvalidCastException)
{
InvalidTriggerParameterException <TTrigger> .Throw(trigger);
return;
}
}
else
{
try
{
triggerAction = (Action <TArgument>)triggerRep.OnTriggerAction;
}
catch (InvalidCastException)
{
InvalidTriggerParameterException <TTrigger> .Throw(trigger);
return;
}
}
// Current exit
if (CheckFlag(currentStateRepresentation.TransitionFlags, AwaitableStateTransitionFlag.ExitReturnsTask))
{
var exit = (Func <Task>)currentStateRepresentation.OnExitAction;
if (exit != null)
{
await exit();
}
}
else
{
var exit = (Action)currentStateRepresentation.OnExitAction;
if (exit != null)
{
exit();
}
}
// Trigger entry
if (triggerAction != null)
{
triggerAction(argument);
}
else if (triggerFunc != null)
{
await triggerFunc(argument);
}
// Next state entry
var nextStateRep = triggerRep.NextStateRepresentation;
if (CheckFlag(nextStateRep.TransitionFlags, AwaitableStateTransitionFlag.EntryReturnsTask))
{
var entry = (Func <Task>)nextStateRep.OnEntryAction;
if (entry != null)
{
await entry();
}
}
else
{
var entry = (Action)nextStateRep.OnEntryAction;
if (entry != null)
{
entry();
}
}
// Set states
var previousState = currentStateRepresentation.State;
currentStateRepresentation = nextStateRep;
// Raise event
var sc = StateChanged;
if (sc != null)
{
sc(previousState, currentStateRepresentation.State);
}
isRunning = false;
}
}
