Add support for variable in FCE converter

Author: ruscoder

src/converter/__tests__/fce.test.ts

@@ -27,6 +27,7 @@ import fce_review_of_systems from './resources/questionnaire_fce/review_of_syste
 import fce_source_queries from './resources/questionnaire_fce/source_queries.json';
 import fce_unit_option from './resources/questionnaire_fce/unit-option.json';
 import fce_vitals from './resources/questionnaire_fce/vitals.json';
+import fce_variable from './resources/questionnaire_fce/variable.json';
 // fhir questionnaire
 import fhir_allergies from './resources/questionnaire_fhir/allergies.json';
 import fhir_beverages from './resources/questionnaire_fhir/beverages.json';
@@ -53,6 +54,7 @@ import fhir_review_of_systems from './resources/questionnaire_fhir/review_of_sys
 import fhir_source_queries from './resources/questionnaire_fhir/source_queries.json';
 import fhir_unit_option from './resources/questionnaire_fhir/unit-option.json';
 import fhir_vitals from './resources/questionnaire_fhir/vitals.json';
+import fhir_variable from './resources/questionnaire_fhir/variable.json';
 import { FCEQuestionnaire } from '../../fce.types';
 
 import { toFirstClassExtension, fromFirstClassExtension } from '../../converter';
@@ -85,6 +87,7 @@ describe('Questionanire and QuestionnaireResponses transformation', () => {
         [fhir_cqf_examples, fce_cqf_examples],
         [fhir_constraint, fce_constraint],
         [fhir_unit_option, fce_unit_option],
+        [fhir_variable, fce_variable],
     ])('Each FHIR Questionnaire should convert to FCE', async (fhir_questionnaire, fce_questionnaire) => {
         expect(toFirstClassExtension(fhir_questionnaire as FHIRQuestionnaire)).toStrictEqual(fce_questionnaire);
     });
@@ -115,6 +118,7 @@ describe('Questionanire and QuestionnaireResponses transformation', () => {
         [fce_cqf_examples, fhir_cqf_examples],
         [fce_constraint, fhir_constraint],
         [fce_unit_option, fhir_unit_option],
+        [fce_variable, fhir_variable],
     ])('Each FCE Questionnaire should convert to FHIR', async (fce_questionnaire, fhir_questionnaire) => {
         expect(sortExtensionsList(fromFirstClassExtension(fce_questionnaire as FCEQuestionnaire))).toStrictEqual(
             sortExtensionsList(fhir_questionnaire),

src/converter/__tests__/resources/questionnaire_fce/variable.json

@@ -0,0 +1,29 @@
+{
+    "resourceType": "Questionnaire",
+    "id": "variable",
+    "meta": {
+        "profile": [
+            "https://emr-core.beda.software/StructureDefinition/fhir-emr-questionnaire"
+        ]
+    },
+    "status": "active",
+    "assembledFrom": "variable",
+    "item": [
+        {
+            "type": "string",
+            "linkId": "test",
+            "variable": [
+                {
+                    "name": "First",
+                    "language": "text/fhirpath",
+                    "expression": "'First'"
+                },
+                {
+                    "name": "Second",
+                    "language": "text/fhirpath",
+                    "expression": "'Second'"
+                }
+            ]
+        }
+    ]
+}

src/converter/__tests__/resources/questionnaire_fhir/variable.json

@@ -0,0 +1,38 @@
+{
+    "item": [
+        {
+            "type": "string",
+            "linkId": "test",
+            "extension": [
+                {
+                    "url": "http://hl7.org/fhir/StructureDefinition/variable",
+                    "valueExpression": {
+                        "name": "First",
+                        "language": "text/fhirpath",
+                        "expression": "'First'"
+                    }
+                },
+                {
+                    "url": "http://hl7.org/fhir/StructureDefinition/variable",
+                    "valueExpression": {
+                        "name": "Second",
+                        "language": "text/fhirpath",
+                        "expression": "'Second'"
+                    }
+                }
+            ]
+        }
+    ],
+    "meta": {
+        "profile": ["https://emr-core.beda.software/StructureDefinition/fhir-emr-questionnaire"]
+    },
+    "extension": [
+        {
+            "url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-assembledFrom",
+            "valueCanonical": "variable"
+        }
+    ],
+    "status": "active",
+    "id": "variable",
+    "resourceType": "Questionnaire"
+}

src/converter/extensions.ts

@@ -35,6 +35,7 @@ export enum ExtensionIdentifier {
     EnableWhenExpression = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression',
     AnswerExpression = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression',
     CqfExpression = 'http://hl7.org/fhir/StructureDefinition/cqf-expression',
+    Variable = 'http://hl7.org/fhir/StructureDefinition/variable',
 
     AdjustLastToRight = 'https://emr-core.beda.software/StructureDefinition/adjust-last-to-right',
     SliderStart = 'https://emr-core.beda.software/StructureDefinition/slider-start',
@@ -225,6 +226,9 @@ export const extensionTransformers: ExtensionTransformer = {
             },
         },
     },
+    [ExtensionIdentifier.Variable]: {
+        path: { extension: 'valueExpression', questionnaire: 'variable', isCollection: true },
+    },
     [ExtensionIdentifier.InitialExpression]: {
         path: { extension: 'valueExpression', questionnaire: 'initialExpression' },
     },