/// <summary>
/// Applies the offset paging middleware to the current field.
/// </summary>
/// <param name="descriptor">
/// The object field descriptor.
/// </param>
/// <param name="itemType">
/// The schema type representation of the item.
/// </param>
/// <param name="entityType">
/// The entity type represents the runtime type of the item.
/// </param>
/// <param name="resolvePagingProvider">
/// A delegate allowing to dynamically define a paging resolver for a field.
/// </param>
/// <param name="options">
/// The paging settings that shall be applied to this field.
/// </param>
/// <returns>
/// Returns the field descriptor for chaining in other configurations.
/// </returns>
public static IObjectFieldDescriptor UseOffsetPaging(
this IObjectFieldDescriptor descriptor,
Type?itemType = null,
Type?entityType = null,
GetOffsetPagingProvider?resolvePagingProvider = null,
PagingOptions options = default)
{
if (descriptor is null)
{
throw new ArgumentNullException(nameof(descriptor));
}
resolvePagingProvider ??= ResolvePagingProvider;
descriptor.AddOffsetPagingArguments();
PagingHelper.UsePaging(
descriptor,
entityType,
(services, source, name) => resolvePagingProvider(services, source, name),
options);
descriptor
.Extend()
.OnBeforeCreate((c, d) =>
{
MemberInfo?resolverMember = d.ResolverMember ?? d.Member;
d.Type = CreateTypeRef(c, resolverMember, itemType, options);
d.CustomSettings.Add(typeof(CollectionSegment));
});
return(descriptor);
}
