/// <summary>
/// Converts a <see cref="Concept"/> instance to an <see cref="FhirCodeableConcept"/> instance.
/// </summary>
/// <param name="concept">The concept to be converted to a <see cref="FhirCodeableConcept"/></param>
/// <param name="preferredCodeSystem">The preferred code system for the codeable concept</param>
/// <param name="nullIfNoPreferred">When true, instructs the system to return only code in preferred code system or nothing</param>
/// <returns>Returns a FHIR codeable concept.</returns>
public static FhirCodeableConcept ToFhirCodeableConcept(Concept concept, String preferredCodeSystem = null, bool nullIfNoPreferred = false)
{
traceSource.TraceEvent(EventLevel.Verbose, "Mapping concept");
if (concept == null)
{
return(null);
}
if (String.IsNullOrEmpty(preferredCodeSystem))
{
return new FhirCodeableConcept
{
Coding = concept.LoadCollection <ConceptReferenceTerm>(nameof(Concept.ReferenceTerms)).Select(o => DataTypeConverter.ToCoding(o.LoadProperty <ReferenceTerm>(nameof(ConceptReferenceTerm.ReferenceTerm)))).ToList(),
Text = concept.LoadCollection <ConceptName>(nameof(Concept.ConceptNames)).FirstOrDefault()?.Name
}
}
;
else
{
var codeSystemService = ApplicationServiceContext.Current.GetService <IConceptRepositoryService>();
var refTerm = codeSystemService.GetConceptReferenceTerm(concept.Key.Value, preferredCodeSystem);
if (refTerm == null && nullIfNoPreferred)
{
return(null); // No code in the preferred system, ergo, we will instead use our own
}
else if (refTerm == null)
{
return new FhirCodeableConcept
{
Coding = concept.LoadCollection <ConceptReferenceTerm>(nameof(Concept.ReferenceTerms)).Select(o => DataTypeConverter.ToCoding(o.LoadProperty <ReferenceTerm>(nameof(ConceptReferenceTerm.ReferenceTerm)))).ToList(),
Text = concept.LoadCollection <ConceptName>(nameof(Concept.ConceptNames)).FirstOrDefault()?.Name
}
}
;
else
{
return new FhirCodeableConcept
{
Coding = new List <FhirCoding>()
{
ToCoding(refTerm)
},
Text = concept.LoadCollection <ConceptName>(nameof(Concept.ConceptNames)).FirstOrDefault()?.Name
}
};
}
}