Saule.Serialization.ResourceDeserializer.ValidateTopLevel C# (CSharp) Method

        private static void ValidateTopLevel(JToken content)
        {
            var isObject = content.Type == JTokenType.Object;

            if (!isObject)
            {
                throw new JsonApiException(ErrorType.Client, "Invalid JSON API request content.");
            }

            var objContent = (JObject)content;
            var properties = objContent.Properties().Select(p => p.Name).ToList();

            var hasData = properties.Contains("data");
            var hasErrors = properties.Contains("errors");
            var hasMeta = properties.Contains("meta");
            var hasIncluded = properties.Contains("included");

            if (!(hasData || hasErrors || hasMeta))
            {
                throw new JsonApiException(ErrorType.Client, "Invalid JSON API request content.");
            }

            if (hasData && hasErrors)
            {
                throw new JsonApiException(ErrorType.Client, "Invalid JSON API request content.");
            }

            if (!hasData && hasIncluded)
            {
                throw new JsonApiException(ErrorType.Client, "Invalid JSON API request content.");
            }

            if (!properties.All(p => _allowedTopLevelMembers.Contains(p)))
            {
                throw new JsonApiException(ErrorType.Client, "Invalid JSON API request content.");
            }
        }