Added context utilities to the base-MEF

Author: Dtphelan1

src/helpers/contextUtils.js

@@ -0,0 +1,15 @@
+const logger = require('./logger');
+const { getBundleResourcesByType } = require('./fhirUtils');
+
+async function getPatient(mrn, context) {
+  const patientInContext = getBundleResourcesByType(context, 'Patient', {}, true);
+  if (!patientInContext) {
+    throw Error('Could not find a patient in context');
+  }
+  logger.debug('Patient resource found in context.');
+  return patientInContext;
+}
+
+module.exports = {
+  getPatient,
+};

src/index.js

@@ -61,6 +61,7 @@ const {
 } = require('./helpers/conditionUtils');
 const { getDiseaseStatusCode, getDiseaseStatusEvidenceCode, mEpochToDate } = require('./helpers/diseaseStatusUtils');
 const { formatDate, formatDateTime } = require('./helpers/dateUtils');
+const { getPatient } = require('./helpers/contextUtils');
 
 module.exports = {
   // CLI Related utilities
@@ -125,4 +126,6 @@ module.exports = {
   isConditionCancer,
   logOperationOutcomeInfo,
   mEpochToDate,
+  // Context operations
+  getPatient,
 };

test/helpers/contextUtils.test.js

@@ -0,0 +1,28 @@
+const { getPatient } = require('../../src/helpers/contextUtils');
+
+const MOCK_PATIENT_MRN = '123';
+
+describe('getPatient', () => {
+  const patientResource = {
+    resourceType: 'Patient',
+    id: 'mCODEPatientExample01',
+  };
+  const patientContext = {
+    resourceType: 'Bundle',
+    type: 'collection',
+    entry: [
+      {
+        fullUrl: 'context-url-1',
+        resource: patientResource,
+      },
+    ],
+  };
+  test('Should return Patient resource in context', async () => {
+    const patient = await getPatient(MOCK_PATIENT_MRN, patientContext);
+    expect(patient.id).toEqual(patientResource.id);
+  });
+
+  test('Should throw an error if there is no patient in context', async () => {
+    await expect(getPatient(MOCK_PATIENT_MRN, {})).rejects.toThrow('Could not find a patient in context');
+  });
+});