ConnectionMetadata.SetRequestHeaders.js

/*
 * This script reads a mocked (hard-coded, thanks APIGEE...) Custom Attribute which
 * in the non-sandbox environments comes from an APIGEE app. These are sent to the API
 * as the `NHSD-Connection-Metadata` header.
 *
 * The Http Header 'NHSD-End-User-Organisation-ODS' is expected.
 */

//---- CHANGE AVAILABLE POINTER TYPES FOR EACH ORGANISATION HERE ----//
const nrlPointers = {
  // This one is needed for Smoke Tests
  "RJ11": [
        "http://snomed.info/sct|736253001",
        "http://snomed.info/sct|736253002"
  ],
  // These ones are needed for the Seed data
  "Y05868": [
    "http://snomed.info/sct|736253002",
    "http://snomed.info/sct|887701000000100",
    "http://snomed.info/sct|1363501000000100",
    "http://snomed.info/sct|861421000000109"
  ],
  "8J008": [
    "http://snomed.info/sct|1363501000000100"
  ],
  "RY26A": [
    "http://snomed.info/sct|861421000000109"
  ],
  "RM559":[
    "http://snomed.info/sct|736253002"
  ]

};
//-------------------------------------------------------------------//

(function () {
  var odsCode = context.getVariable(
    "request.header.NHSD-End-User-Organisation-ODS"
  );
  if (!odsCode || odsCode.trim().length === 0) {
    //This will trigger RaiseFault.400MissingODSHeader.xml - see proxies/default.xml in the DefaultFaultRules
    return;
  }

  var nrlPointerTypes = nrlPointers[odsCode];
  if (!nrlPointerTypes) {
    //This will trigger RaiseFault.400NoPointers.xml - see targets/target.xml
    return;
  }

  var odsCodeExtension = context.getVariable(
    "request.header.NHSD-End-User-Organisation"
  );

  var connectionMetadata = {
    "nrl.ods-code": odsCode,
    "nrl.ods-code-extension": odsCodeExtension,
    "nrl.pointer-types": nrlPointerTypes,
    "nrl.app-id": "NRL-SANDBOX-APP"
  };
  
  context.targetRequest.headers["NHSD-Connection-Metadata"] =
    connectionMetadata;
})();