public ISchema CreateSchema(Starwars starwars)
{
var schema = StarwarsSchema.Create();
var resolvers = StarwarsResolvers.BuildResolvers(starwars);
var executable = SchemaTools.MakeExecutableSchemaWithIntrospection(
schema,
resolvers);
return(executable);
}
public static ObjectTypeMap BuildResolvers(Starwars starwars)
{
async ValueTask <IResolverResult> ResolveCharacter(IResolverContext context)
{
var id = (string)context.Arguments["id"];
var character = await starwars.GetCharacter(id).ConfigureAwait(false);
return(As(context.ExecutionContext.Schema.GetNamedType <ObjectType>("Human"), character));
}
async ValueTask <IResolverResult> ResolveHuman(IResolverContext context)
{
var id = (string)context.Arguments["id"];
var human = await starwars.GetHuman(id).ConfigureAwait(false);
return(As(human));
}
async ValueTask <IResolverResult> ResolveFriends(IResolverContext context)
{
var character = (Starwars.Character)context.ObjectValue;
var friends = character.GetFriends();
await Task.Delay(0).ConfigureAwait(false);
return(As(friends, friend => CharacterIsTypeOf(friend, context)));
}
IType CharacterIsTypeOf(object character, IResolverContext context)
{
return(character switch
{
Starwars.Human human => context.ExecutionContext.Schema.GetNamedType <ObjectType>("Human"),
_ => throw new ArgumentOutOfRangeException(nameof(character))
});
}
public Human(Starwars starwars)
{
_starwars = starwars;
}