/// <summary>
/// Configures transition guard based on specified list user of roles.
/// </summary>
/// <typeparam name="TState">The type of the state.</typeparam>
/// <typeparam name="TActivity">The type of the activity.</typeparam>
/// <param name="stateConfig">The state configuration.</param>
/// <param name="trigger">The trigger.</param>
/// <param name="destinationState">State of the destination.</param>
/// <param name="roleGuard">The actor guard, use this.PermitFor() helper method to define list of permitted roles.</param>
/// <returns></returns>
public static StateMachine <TState, TActivity> .StateConfiguration PermitForActors <TState, TActivity>(
this StateMachine <TState, TActivity> .StateConfiguration stateConfig,
TActivity trigger,
TState destinationState,
TransitionGuard roleGuard)
{
return(stateConfig
.PermitIf(trigger, destinationState, roleGuard.GuardMethod, roleGuard.Description));
}
/// <summary>
/// Permits the trigger only if all conditions are met.
/// </summary>
/// <typeparam name="TState">The type of the state.</typeparam>
/// <typeparam name="TActivity">The type of the activity.</typeparam>
/// <param name="stateConfig">The state configuration.</param>
/// <param name="trigger">The trigger.</param>
/// <param name="destinationState">State of the destination.</param>
/// <param name="actorGuard">The role guard.</param>
/// <param name="guards">The guards.</param>
/// <returns>State machine configuration</returns>
public static StateMachine <TState, TActivity> .StateConfiguration PermitOnlyIf <TState, TActivity>(
this StateMachine <TState, TActivity> .StateConfiguration stateConfig,
TActivity trigger,
TState destinationState,
TransitionGuard actorGuard,
params Func <bool>[] guards)
{
var listOfGuards = new List <TransitionGuard>(new[] { actorGuard });
var otherGuards = guards
.Select(g => new TransitionGuard(g, g.Method.Name))
.ToList();
listOfGuards
.AddRange(otherGuards);
//var triggerName = trigger.ToString();
//var destinationStateName = destinationState.ToString();
//var currentStateName = stateConfig.State.ToString();
Func <bool> aggregateGuardExpression = () =>
{
var failedGuards = listOfGuards
.Where(g => !g.GuardMethod())
.Select(g => g.Description)
.ToArray();
return
(!failedGuards.Any());
// THIS MIGHT NOT WORK WELL WITH MULTIPLE DESTINATIONS
// FOR SAME TRIGGER BECAUSE OTHER VALID GUARD MIGHT NOT
// HAVE CHANCE TO BE EVALUATED BECAUSE OF THIS EXCEPTION
// ON THE OTHER HAND THIS GIVES US EXACT REPORT OF FAILED CONDITIONS
// Alternative is to "return false" here but get more generic exeption;
// throw new UnmetTransitionGuardsException(currentStateName, triggerName, destinationStateName, failedGuards);
// return true;
};
var otherGuardsSummary = otherGuards
.Select(g => g.Description.SplitCamelCase())
.ToSeparatedString(", ");
var otherGuardsDescritpion = otherGuards.Any() ? $" and {otherGuardsSummary}" : "";
return(stateConfig
.PermitIf(trigger, destinationState, aggregateGuardExpression, $"{actorGuard.Description}{otherGuardsDescritpion}"));
}
/// <summary>
/// Permits for.
/// </summary>
/// <param name="allowedActors">The allowed actors.</param>
/// <returns></returns>
protected TransitionGuard For(params TActor[] allowedActors)
{
var actorGuard = new TransitionGuard(
guardMethod: () => _actorProvider
.GetCurrentImpersonations()
.Any(allowedActors.Contains),
description: allowedActors
.Select(r => r.ToString())
.ToSeparatedString(", ")
);
return
(actorGuard);
}