public async Task <IEnumerable <FhirTransactionRequestEntry> > BuildAsync(FhirTransactionContext context, CancellationToken cancellationToken)
{
EnsureArg.IsNotNull(context, nameof(context));
EnsureArg.IsNotNull(context.ChangeFeedEntry, nameof(context.ChangeFeedEntry));
Identifier identifier = IdentifierUtility.CreateIdentifier(context.ChangeFeedEntry.StudyInstanceUid);
List <Observation> matchingObservations = (await _fhirService.RetrieveObservationsAsync(identifier, cancellationToken)).ToList();
// terminate early if no observation found
if (matchingObservations.Count == 0)
{
return(null);
}
var requests = new List <FhirTransactionRequestEntry>();
foreach (Observation observation in matchingObservations)
{
Bundle.RequestComponent request = new Bundle.RequestComponent()
{
Method = Bundle.HTTPVerb.DELETE,
Url = $"{ResourceType.Observation.GetLiteral()}/{observation.Id}"
};
requests.Add(new FhirTransactionRequestEntry(
FhirTransactionRequestMode.Delete,
request,
observation.ToServerResourceId(),
observation));
}
return(requests);
}
public async Task <IEnumerable <FhirTransactionRequestEntry> > BuildAsync(FhirTransactionContext context, CancellationToken cancellationToken)
{
EnsureArg.IsNotNull(context?.ChangeFeedEntry, nameof(context.ChangeFeedEntry));
EnsureArg.IsNotNull(context.Request, nameof(context.Request));
IResourceId patientId = context.Request.Patient.ResourceId;
IResourceId imagingStudyId = context.Request.ImagingStudy.ResourceId;
ChangeFeedEntry changeFeedEntry = context.ChangeFeedEntry;
Identifier identifier = IdentifierUtility.CreateIdentifier(changeFeedEntry.StudyInstanceUid);
IReadOnlyCollection <Observation> observations = _observationParser.Parse(changeFeedEntry.Metadata, patientId.ToResourceReference(), imagingStudyId.ToResourceReference(), identifier);
if (observations.Count == 0)
{
return(Enumerable.Empty <FhirTransactionRequestEntry>());
}
Identifier imagingStudyIdentifier = imagingStudyId.ToResourceReference().Identifier;
IEnumerable <Observation> existingDoseSummariesAsync = imagingStudyIdentifier != null
? await _fhirService
.RetrieveObservationsAsync(
imagingStudyId.ToResourceReference().Identifier,
cancellationToken)
: new List <Observation>();
// TODO: Figure out a way to match existing observations with newly created ones.
List <FhirTransactionRequestEntry> fhirRequests = new List <FhirTransactionRequestEntry>();
foreach (var observation in observations)
{
fhirRequests.Add(new FhirTransactionRequestEntry(
FhirTransactionRequestMode.Create,
new Bundle.RequestComponent()
{
Method = Bundle.HTTPVerb.POST,
Url = ResourceType.Observation.GetLiteral()
},
new ClientResourceId(),
observation));
}
return(fhirRequests);
}