/// <summary>Registers a handler for a directive that is already registered, possibly in another module. </summary>
/// <param name="module">GraphQL module.</param>
/// <param name="name">Directive name.</param>
/// <param name="handler">Handler instance.</param>
/// <remarks>The purpose of this method is to allow registering handlers separately from the directives themselves.
/// You can have a directive defined in light, module not dependent on any server-side assemblies, so it can be
/// used in client-side code. The directive's handler can be registered in server-side assembly, as it likely
/// needs access to server-side functionality.
/// </remarks>
public static void RegisterDirectiveHandler(this GraphQLModule module, string name, IDirectiveHandler handler = null)
{
var reg = new DirectiveRegistration()
{
Name = name, Handler = handler
};
module.RegisteredDirectives.Add(reg);
}
public static void RegisterDirective(this GraphQLModule module, string name, MethodInfo signature,
DirectiveLocation locations, string description = null, IDirectiveHandler handler = null, bool listInSchema = true)
{
if (signature == null)
{
throw new ArgumentException("RegisterDirective method: signature parameter may not be null.");
}
var reg = new DirectiveRegistration()
{
Name = name, Signature = signature, Locations = locations, Description = description,
ListInSchema = listInSchema, Handler = handler
};
module.RegisteredDirectives.Add(reg);
}
public static void RegisterDirective(this GraphQLModule module, string name, Type directiveAttributeType,
DirectiveLocation locations, string description = null, IDirectiveHandler handler = null, bool listInSchema = true)
{
if (!typeof(BaseDirectiveAttribute).IsAssignableFrom(directiveAttributeType))
{
throw new ArgumentException(
$"RegisterDirective method: directive attribute must be subclass of {nameof(directiveAttributeType)}");
}
var reg = new DirectiveRegistration()
{
Name = name, AttributeType = directiveAttributeType, Locations = locations, Description = description,
ListInSchema = listInSchema, Handler = handler
};
module.RegisteredDirectives.Add(reg);
}