public static OpenApiParameter CreateOrderBy()

in src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiParameterGenerator.cs [369:427]
55 lines of code
11 McCabe index (conditional complexity)

        public static OpenApiParameter CreateOrderBy(this ODataContext context, IEdmVocabularyAnnotatable target, IEdmStructuredType structuredType)
        {
            Utils.CheckArgumentNull(context, nameof(context));
            Utils.CheckArgumentNull(target, nameof(target));
            Utils.CheckArgumentNull(structuredType, nameof(structuredType));

            SortRestrictionsType sort = context.Model.GetRecord<SortRestrictionsType>(target, CapabilitiesConstants.SortRestrictions);
            if (sort != null && !sort.IsSortable)
            {
                return null;
            }

            IList<IOpenApiAny> orderByItems = new List<IOpenApiAny>();
            foreach (var property in structuredType.StructuralProperties())
            {
                if (sort != null && sort.IsNonSortableProperty(property.Name))
                {
                    continue;
                }

                bool isAscOnly = sort != null && sort.IsAscendingOnlyProperty(property.Name);
                bool isDescOnly = sort != null && sort.IsDescendingOnlyProperty(property.Name);
                if (isAscOnly || isDescOnly)
                {
                    if (isAscOnly)
                    {
                        orderByItems.Add(new OpenApiString(property.Name));
                    }
                    else
                    {
                        orderByItems.Add(new OpenApiString(property.Name + " desc"));
                    }
                }
                else
                {
                    orderByItems.Add(new OpenApiString(property.Name));
                    orderByItems.Add(new OpenApiString(property.Name + " desc"));
                }
            }

            return new OpenApiParameter
            {
                Name = "$orderby",
                In = ParameterLocation.Query,
                Description = "Order items by property values",
                Schema = new OpenApiSchema
                {
                    Type = "array",
                    UniqueItems = true,
                    Items = new OpenApiSchema
                    {
                        Type = "string",
                        Enum = orderByItems
                    }
                },
                Style = ParameterStyle.Form,
                Explode = false
            };
        }