public async Task GetDocumentType()

in packages/ekyc-api/src/ekyc-api/DocumentDefinitions/RekognitionDocumentChecker.cs [30:95]
52 lines of code
8 McCabe index (conditional complexity)

        public async Task<DocumentTypeCheckResponse> GetDocumentType(string s3Key)
        {
            AWSXRayRecorder.Instance.BeginSubsegment("RekognitionDocumentChecker:GetDocumentType");

            Debug.WriteLine($"Getting document type for {s3Key}");

            if (!string.IsNullOrEmpty(Globals.RekognitionCustomLabelsProjectArn) && !string.IsNullOrEmpty(Globals.RekognitionCustomLabelsProjectVersionArn))
            {
                // Can't check this document as there is no Rekognition Custom Labels project running
                var projects = await _rekognition.DescribeProjectVersionsAsync(new DescribeProjectVersionsRequest()
                    { ProjectArn = Globals.RekognitionCustomLabelsProjectArn });

                var projectVersion = projects.ProjectVersionDescriptions.Where(a => a.Status == "RUNNING")
                    .OrderByDescending(a => a.CreationTimestamp).FirstOrDefault();

                if (projectVersion==null)
                    return new DocumentTypeCheckResponse { Type = null, BoundingBox = null };
            }
            else
            {
                return new DocumentTypeCheckResponse { Type = null, BoundingBox = null };
            }

            var response = await _rekognition.DetectCustomLabelsAsync(new DetectCustomLabelsRequest
            {
                Image = new Image
                {
                    S3Object = new S3Object
                    {
                        Bucket = Globals.StorageBucket,
                        Name = s3Key
                    }
                },
                MinConfidence = Convert.ToSingle(Globals.GetMinimumConfidence()),
                ProjectVersionArn = Globals.RekognitionCustomLabelsProjectVersionArn
            });

            var uniqueLabels = response?.CustomLabels?
                .OrderByDescending(a => a.Confidence)
                .ThenByDescending(a => a.Geometry.BoundingBox.Height)
                .ThenByDescending(a => a.Geometry.BoundingBox.Width)
                .GroupBy(a => a.Name)
                .Select(a => a.First())
                .ToList();

            if (uniqueLabels == null || uniqueLabels.Count == 0)
                return new DocumentTypeCheckResponse { Type = null, BoundingBox = null };

            foreach (var label in uniqueLabels)
            {
                DocumentTypes detectedLabelName;

                if (Enum.TryParse(label.Name, true, out detectedLabelName))
                {
                    var bb = BoundingBox.GetBoundingBoxFromRekognition(label.Geometry.BoundingBox);

                    return new DocumentTypeCheckResponse { Type = detectedLabelName, BoundingBox = bb };
                    ;
                }
            }

            AWSXRayRecorder.Instance.EndSubsegment();

            // No label found
            return new DocumentTypeCheckResponse { Type = null, BoundingBox = null };
        }