protected override void Configure(IObjectTypeDescriptor <ContestComboDetail> descriptor)
{
descriptor.Field(x => x.UseBefore)
.Description("A list of moves to use before this move.")
.Type <ListType <MoveType> >()
.Resolver((ctx, token) =>
{
var resolver = ctx.Service <MoveResolver>();
return(MonadMaybe.Lift(ctx.Parent <ContestComboDetail>())
.Select(x => x.UseBefore)
.Select(moves => moves.Select(move => resolver.GetMoveAsync(move.Name, token)))
.Match(Task.WhenAll, Task.FromResult <Move[]>(default)));
/// <summary> /// Projects the wrapped value into a new one and wraps it. /// </summary> /// <typeparam name="TSource">The type of the wrapped value.</typeparam> /// <typeparam name="TResult">The type to project the value into.</typeparam> /// <param name="source">The wrapper.</param> /// <param name="project">A transform function to apply on the wrapped value.</param> /// <returns>The projection of the wrapped value in a wrapper.</returns> public static Maybe <TResult> Select <TSource, TResult>(this Maybe <TSource> source, Func <TSource, TResult> project) => source.Bind(val => Maybe.Lift(project(val)));
/// <summary> /// Maps the wrapped value into another wrapped value. /// </summary> /// <typeparam name="TResult">The type of the result of the mapping.</typeparam> /// <param name="mapFn">The mapping function. Should not throw exceptions.</param> /// <returns>The wrapped mapped value.</returns> public Maybe <TResult> Map <TResult>(Func <T, TResult> mapFn) => this.Bind(val => Maybe.Lift(mapFn(val)));