public void WhenHealthVaultMedicationTransformedToFhir_ThenStrengthIsCopiedAsExtension()
{
const string strengthDisplay = "600mg";
var hvMedication = new HVMedication()
{
Name = new CodableValue("Ibuprofen"),
Strength = new GeneralMeasurement(strengthDisplay)
};
const int strengthValue = 600;
hvMedication.Strength.Structured.Add(
new StructuredMeasurement(strengthValue,
new CodableValue("Milligrams (mg)",
new CodedValue("mg",
family: "wc",
vocabularyName: "medication-strength-unit",
version: "1"))));
var fhirMedication = ExtractEmbeddedMedication(hvMedication);
Assert.IsTrue(((IExtendable)fhirMedication).HasExtensions());
var medicationExtension = fhirMedication.GetExtension(HealthVaultExtensions.Medication);
var strength = medicationExtension?.GetExtension(HealthVaultExtensions.MedicationStrength);
Assert.AreEqual(strengthDisplay, strength?
.GetStringExtension(HealthVaultExtensions.MedicationStrengthDisplay));
Assert.AreEqual(strengthValue, (strength?
.GetExtensions(HealthVaultExtensions.MedicationStrengthQuantity)
.FirstOrDefault()?.Value as Quantity)?.Value);
}
internal static MedicationStatement ToFhirInternal(HVMedication hvMedication, MedicationStatement medicationStatement)
{
var embeddedMedication = new FhirMedication();
embeddedMedication.Id = "med" + Guid.NewGuid();
medicationStatement.Contained.Add(ToFhirInternal(hvMedication, embeddedMedication));
medicationStatement.Medication = embeddedMedication.GetContainerReference();
medicationStatement.SetStatusAsActive();
medicationStatement.SetTakenAsNotApplicable();
medicationStatement.Dosage = AddDosage(hvMedication.Dose, hvMedication.Frequency, hvMedication.Route);
if (hvMedication.Prescription != null)
{
var embeddedMedicationRequest = new MedicationRequest();
embeddedMedicationRequest.Id = "medReq" + Guid.NewGuid();
Practitioner prescribedBy = hvMedication.Prescription.PrescribedBy.ToFhir();
prescribedBy.Id = "prac" + Guid.NewGuid();
medicationStatement.Contained.Add(prescribedBy);
MedicationRequest request = ToFhirInternal(hvMedication.Prescription, embeddedMedicationRequest);
request.Medication = embeddedMedication.GetContainerReference();
request.Requester = new MedicationRequest.RequesterComponent
{
Agent = prescribedBy.GetContainerReference()
};
medicationStatement.Contained.Add(request);
medicationStatement.BasedOn.Add(embeddedMedicationRequest.GetContainerReference());
}
return(medicationStatement);
}
internal static FhirMedication ToFhirInternal(HVMedication hvMedication, FhirMedication fhirMedication)
{
fhirMedication.Code = hvMedication.Name.ToFhir();
if (hvMedication.GenericName != null || hvMedication.Strength != null)
{
var medicationExtension = new Extension {
Url = HealthVaultExtensions.Medication
};
if (hvMedication.GenericName != null)
{
var genericName = hvMedication.GenericName?.ToFhir();
medicationExtension.AddExtension(HealthVaultExtensions.MedicationGenericName,
genericName);
}
if (hvMedication.Strength != null)
{
var strengthExtension = new Extension {
Url = HealthVaultExtensions.MedicationStrength
};
strengthExtension.AddExtension(HealthVaultExtensions.MedicationStrengthDisplay,
new FhirString(hvMedication.Strength.Display));
foreach (var structuredMeasurement in hvMedication.Strength.Structured)
{
var simpleQuantity = new SimpleQuantity()
{
Value = new decimal(structuredMeasurement.Value),
Unit = structuredMeasurement.Units.Text
};
if (structuredMeasurement.Units.Any())
{
CodedValue measurementUnit = structuredMeasurement.Units.First();
simpleQuantity.Code = measurementUnit.Value;
simpleQuantity.System = HealthVaultVocabularies.GenerateSystemUrl(measurementUnit.VocabularyName, measurementUnit.Family);
}
strengthExtension.AddExtension(HealthVaultExtensions.MedicationStrengthQuantity, simpleQuantity);
}
medicationExtension.Extension.Add(strengthExtension);
}
fhirMedication.Extension.Add(medicationExtension);
}
return(fhirMedication);
}
public static ThingBase ToHealthVault(this FhirMedication fhirMedication)
{
var hvMedication = new HVMedication();
var name = fhirMedication.Code.ToCodableValue();
if (name == null)
{
throw new NotSupportedException($"{nameof(FhirMedication)} should" +
$" have {nameof(fhirMedication.Code)}");
}
hvMedication.Name = name;
var medicationExtension = fhirMedication.GetExtension(HealthVaultExtensions.Medication);
if (medicationExtension != null)
{
var genericName = medicationExtension
.GetExtensionValue <CodeableConcept>(HealthVaultExtensions.MedicationGenericName);
hvMedication.GenericName = genericName?.ToCodableValue();
var strengthExtension = medicationExtension.GetExtension(HealthVaultExtensions.MedicationStrength);
if (strengthExtension != null)
{
string display = strengthExtension.GetStringExtension(HealthVaultExtensions.MedicationStrengthDisplay);
var strength = new GeneralMeasurement(display);
foreach (var quantityExtension
in strengthExtension.GetExtensions(HealthVaultExtensions.MedicationStrengthQuantity))
{
var quantity = quantityExtension.Value as Quantity;
if (quantity == null)
{
continue;
}
strength.Structured.Add(new StructuredMeasurement
{
Value = (double)quantity.Value,
Units = CodeToHealthVaultHelper.CreateCodableValueFromQuantityValues(
quantity.System, quantity.Code, quantity.Unit)
});
}
hvMedication.Strength = strength;
}
}
return(hvMedication);
}
public void WhenHealthVaultMedicationTransformedToFhir_ThenNameIsCopiedToCode()
{
const string medicationName = "Ibuprofen";
var hvMedication = new HVMedication()
{
Name = new CodableValue(medicationName,
new CodedValue("df48b0ac-de8b-4bca-8785-dad6897fb53d",
family: "wc",
vocabularyName: "MayoMedications",
version: "1"))
};
var fhirMedication = ExtractEmbeddedMedication(hvMedication);
var medicationCode = fhirMedication.Code;
Assert.AreEqual(medicationName, medicationCode.Text);
}
public void WhenHealthVaultMedicationTransformedToFhir_ThenGenericNameIsCopiedAsExtension()
{
const string medicationName = "Ibuprofen / Tolperisone Oral Tablet";
var hvMedication = new HVMedication()
{
Name = new CodableValue("Ibuprofen"),
GenericName = new CodableValue(medicationName,
new CodedValue("1579080",
family: "RxNorm",
vocabularyName: "RxNorm Obsolete Medicines",
version: "09AB_091102F"))
};
var fhirMedication = ExtractEmbeddedMedication(hvMedication);
Assert.IsTrue(((IExtendable)fhirMedication).HasExtensions());
var medicationExtension = fhirMedication.GetExtension(HealthVaultExtensions.Medication);
var genericName = medicationExtension?
.GetExtensionValue <CodeableConcept>(HealthVaultExtensions.MedicationGenericName);
Assert.AreEqual(medicationName, genericName?.Text);
}
private static FhirMedication ExtractEmbeddedMedication(HVMedication hvMedication)
{
var medicationStatement = hvMedication.ToFhir();
var medicationReference = medicationStatement.Medication as ResourceReference;
if (medicationReference != null)
{
if (medicationReference.IsContainedReference)
{
return(medicationStatement.Contained.First(domainResource
=> medicationReference.Matches(domainResource.GetContainerReference())) as FhirMedication);
}
throw new AssertInconclusiveException();
}
else
{
var medicationCodeableConcept = medicationStatement.Medication as CodeableConcept;
return(new FhirMedication
{
Code = medicationCodeableConcept
});
}
}
// Register the type on the generic ThingToFhir partial class
public static MedicationStatement ToFhir(this HVMedication hvMedication)
{
return(MedicationToFhir.ToFhirInternal(hvMedication, ToFhirInternal <MedicationStatement>(hvMedication)));
}
private MedicationRequest ExtractEmbeddedMedicationRequest(HVMedication hvMedication)
{
return(ExtractEmbeddedMedicationRequest(hvMedication.ToFhir()));
}
