public static T HasDirective <T>(this SkillResponse response, Predicate <T> predicate = null) where T : IDirective
{
GuardAgainstNull(nameof(response), response);
var directives = response?.Response?.Directives?.OfType <T>().Where(d => predicate?.Invoke(d) ?? true).ToArray() ?? new T[] { };
if (directives.Length == 0)
{
throw new DirectiveMissingException(AlexaAssertMessages.NoDirective(typeof(T).Name));
}
if (predicate != null && directives.Length > 1)
{
throw new AmbiguousDirectiveException(AlexaAssertMessages.MultipleDirectives(typeof(T).Name));
}
return(directives.First());
}
public static ICard HasCard <TCard>(this SkillResponse response, Predicate <TCard> predicate = null) where TCard : class, ICard
{
GuardAgainstNull(nameof(response), response);
if (response.Response?.Card == null)
{
throw new CardMissingException(AlexaAssertMessages.CardNotSet);
}
var card = response.Response.Card;
if (!(card is TCard))
{
throw new CardMismatchException(AlexaAssertMessages.Mismatch(typeof(TCard).FullName, card?.GetType().FullName ?? "null"));
}
if (predicate != null && !predicate(response.Response.Card as TCard))
{
throw new PredicateFailedException();
}
return(response.Response.Card);
}
public static Reprompt HasReprompt <TOutput>(this SkillResponse response, Predicate <TOutput> predicate = null) where TOutput : class, IOutputSpeech
{
GuardAgainstNull(nameof(response), response);
if (response.Response.Reprompt == null)
{
throw new RepromptMissingException(AlexaAssertMessages.RepromptNotSet);
}
var output = response.Response.Reprompt.OutputSpeech;
if (!(output is TOutput))
{
throw new OutputMismatchException(AlexaAssertMessages.Mismatch(typeof(TOutput).FullName, output?.GetType().FullName ?? "null"));
}
if (predicate != null && !predicate(output as TOutput))
{
throw new PredicateFailedException();
}
return(response.Response.Reprompt);
}
//TODO: Add tests
public static TOutput Tells <TOutput>(this SkillResponse response, Predicate <TOutput> predicate = null) where TOutput : class, IOutputSpeech
{
GuardAgainstNull(nameof(response), response);
var shouldEnd = response?.Response?.ShouldEndSession;
if (!shouldEnd.HasValue || !shouldEnd.Value)
{
throw new ShouldEndSessionException(AlexaAssertMessages.TellShouldEndSessionNotFalse);
}
var output = response.Response?.OutputSpeech;
if (!(output is TOutput))
{
throw new OutputMismatchException(AlexaAssertMessages.Mismatch(typeof(TOutput).FullName, output?.GetType().FullName ?? "null"));
}
if (predicate != null && !predicate(output as TOutput))
{
throw new PredicateFailedException();
}
return(output as TOutput);
}
