public OpenApiReference ConvertToOpenApiReference()

in src/Microsoft.OpenApi.Readers/V3/OpenApiV3VersionService.cs [56:110]
47 lines of code
9 McCabe index (conditional complexity)

        public OpenApiReference ConvertToOpenApiReference(
            string reference,
            ReferenceType? type)
        {
            if (!string.IsNullOrWhiteSpace(reference))
            {
                var segments = reference.Split('#');
                if (segments.Length == 1)
                {
                    // Either this is an external reference as an entire file
                    // or a simple string-style reference for tag and security scheme.
                    if (type == null)
                    {
                        // "$ref": "Pet.json"
                        return new OpenApiReference
                        {
                            Type = type,
                            ExternalResource = segments[0]
                        };
                    }

                    if (type == ReferenceType.Tag || type == ReferenceType.SecurityScheme)
                    {
                        return new OpenApiReference
                        {
                            Type = type,
                            Id = reference
                        };
                    }
                }
                else if (segments.Length == 2)
                {
                    if (reference.StartsWith("#"))
                    {
                        // "$ref": "#/components/schemas/Pet"
                        return ParseLocalReference(segments[1]);
                    }
                    // Where fragments point into a non-OpenAPI document, the id will be the complete fragment identifier
                    string id = segments[1];
                    // $ref: externalSource.yaml#/Pet
                    if (id.StartsWith("/components/"))
                    {
                        id = segments[1].Split('/')[3];
                    } 
                    return new OpenApiReference
                    {
                        ExternalResource = segments[0],
                        Type = type,
                        Id = id
                    };
                }
            }

            throw new OpenApiException(string.Format(SRResource.ReferenceHasInvalidFormat, reference));
        }