Add cqf-expression

Refs: beda-software/fhir-emr#321
beda-software · Nov 3, 2024 · b56be7a · b56be7a
1 parent bf715cd
commit b56be7a
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Showing 3 changed files with 25 additions and 1 deletion.
diff --git a/sdc-qrf/src/components.tsx b/sdc-qrf/src/components.tsx
@@ -63,7 +63,8 @@ export function QuestionItem(props: QuestionItemProps) {
     } = useContext(QRFContext);
     const { formValues, setFormValues } = useQuestionnaireResponseFormContext();
 
-    const { type, linkId, calculatedExpression, variable, repeats, itemControl } = questionItem;
+    const { type, linkId, calculatedExpression, variable, repeats, itemControl, cqfExpression } =
+        questionItem;
     const fieldPath = useMemo(() => [...parentPath, linkId!], [parentPath, linkId]);
 
     // TODO: how to do when item is not in QR (e.g. default element of repeatable group)
@@ -116,10 +117,26 @@ export function QuestionItem(props: QuestionItemProps) {
                 }
             }
         }
+        if (!isGroupItem(questionItem, context) && cqfExpression) {
+            try {
+                if (cqfExpression.language === 'text/fhirpath') {
+                    questionItem.text = fhirpath.evaluate(
+                        context.context || {},
+                        cqfExpression.expression!,
+                        context as ItemContext,
+                    )[0];
+                }
+            } catch (err: unknown) {
+                throw Error(
+                    `FHIRPath expression evaluation failure for "cqfExpression" in ${questionItem.linkId}: ${err}`,
+                );
+            }
+        }
     }, [
         setFormValues,
         formValues,
         calculatedExpression,
+        cqfExpression,
         context,
         parentPath,
         repeats,

diff --git a/sdc-qrf/src/converter/extensions.ts b/sdc-qrf/src/converter/extensions.ts
@@ -8,6 +8,7 @@ export enum ExtensionIdentifier {
     SliderStepValue = 'http://hl7.org/fhir/StructureDefinition/questionnaire-sliderStepValue',
     Unit = 'http://hl7.org/fhir/StructureDefinition/questionnaire-unit',
     ReferenceResource = 'http://hl7.org/fhir/StructureDefinition/questionnaire-referenceResource',
+    CqfExpression = 'http://hl7.org/fhir/StructureDefinition/cqf-expression',
 
     ItemPopulationContext = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemPopulationContext',
     InitialExpression = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression',
@@ -74,6 +75,9 @@ export const extensionTransformers: ExtensionTransformer = {
             },
         },
     },
+    [ExtensionIdentifier.CqfExpression]: {
+        path: { extension: 'valueExpression', questionnaire: 'cqfExpression' },
+    },
 
     [ExtensionIdentifier.ItemPopulationContext]: {
         path: { extension: 'valueExpression', questionnaire: 'itemPopulationContext' },

diff --git a/shared/src/contrib/aidbox/index.ts b/shared/src/contrib/aidbox/index.ts
@@ -14366,6 +14366,9 @@ export interface QuestionnaireItem {
     /** An invariant that must be satisfied before responses to the questionnaire can be considered "complete". */
     constraint?: QuestionnaireItemConstraint[];
     /** ElementDefinition - details for the item */
+    /** NOTE: from extension http://hl7.org/fhir/StructureDefinition/cqf-expression */
+    /** An expression that, when evaluated, provides the value for the element on which it appears. */
+    cqfExpression: Expression;
     definition?: uri;
     /** all | any */
     enableBehavior?: code;