public static OpenApiParameter ToOpenApiParameter()

in src/Microsoft.Azure.WebJobs.Extensions.OpenApi.Core/Extensions/OpenApiParameterAttributeExtensions.cs [28:106]
64 lines of code
13 McCabe index (conditional complexity)

        public static OpenApiParameter ToOpenApiParameter(this OpenApiParameterAttribute attribute, NamingStrategy namingStrategy = null, VisitorCollection collection = null, OpenApiVersionType version = OpenApiVersionType.V2)
        {
            attribute.ThrowIfNullOrDefault();

            if (namingStrategy.IsNullOrDefault())
            {
                namingStrategy = new DefaultNamingStrategy();
            }

            if (collection.IsNullOrDefault())
            {
                collection = VisitorCollection.CreateInstance();
            }

            var type = attribute.Type;

            var schema = collection.ParameterVisit(type, namingStrategy);

            var parameter = new OpenApiParameter()
            {
                Name = attribute.Name,
                Description = attribute.Description,
                Required = attribute.Required,
                Deprecated = attribute.Deprecated,
                In = attribute.In,
                Schema = schema
            };

            if (type.IsOpenApiArray())
            {
                if (attribute.In == ParameterLocation.Path)
                {
                    parameter.Style = ParameterStyle.Simple;
                    parameter.Explode = false;
                }

                if (attribute.In == ParameterLocation.Query)
                {
                    parameter.Style = attribute.CollectionDelimiter == OpenApiParameterCollectionDelimiterType.Comma
                                      ? ParameterStyle.Form
                                      : (attribute.CollectionDelimiter == OpenApiParameterCollectionDelimiterType.Space
                                         ? ParameterStyle.SpaceDelimited
                                         : ParameterStyle.PipeDelimited);
                    parameter.Explode = attribute.CollectionDelimiter == OpenApiParameterCollectionDelimiterType.Comma
                                        ? attribute.Explode
                                        : false;
                }
            }

            if (!string.IsNullOrWhiteSpace(attribute.Summary))
            {
                var summary = new OpenApiString(attribute.Summary);

                parameter.Extensions.Add("x-ms-summary", summary);
            }

            if (attribute.Visibility != OpenApiVisibilityType.Undefined)
            {
                var visibility = new OpenApiString(attribute.Visibility.ToDisplayName());

                parameter.Extensions.Add("x-ms-visibility", visibility);
            }

            if (attribute.Example.IsNullOrDefault())
            {
                return parameter;
            }

            var example = (dynamic)Activator.CreateInstance(attribute.Example);
            var examples = (IDictionary<string, OpenApiExample>)example.Build(namingStrategy).Examples;

            parameter.Examples = examples;
            if (version == OpenApiVersionType.V2)
            {
                parameter.Example = examples.First().Value.Value;
            }

            return parameter;
        }