feat(engine): add private NDC nodes and ontology bridge

packages/n8n-nodes-ndc/nodes/shared/http.ts

@@ -0,0 +1,40 @@
+import type {
+  IExecuteFunctions,
+  ILoadOptionsFunctions,
+  IHttpRequestOptions,
+  INodeListSearchItems,
+} from 'n8n-workflow';
+
+import { dataProductOptions, normalizeBaseUrl } from './contracts';
+
+type NdcHttpContext = IExecuteFunctions | ILoadOptionsFunctions;
+
+export function serviceBaseUrl(environmentVariable: string, defaultBaseUrl: string): string {
+  return normalizeBaseUrl(process.env[environmentVariable] || defaultBaseUrl);
+}
+
+export async function ndcRequest(
+  context: NdcHttpContext,
+  credentialName: string,
+  options: IHttpRequestOptions,
+): Promise<unknown> {
+  return context.helpers.httpRequestWithAuthentication.call(context, credentialName, {
+    ...options,
+    json: true,
+  });
+}
+
+export async function loadDataProductOptions(
+  context: ILoadOptionsFunctions,
+  credentialName: string,
+  baseUrlEnvironmentVariable: string,
+  defaultBaseUrl: string,
+  catalogPath: string,
+): Promise<INodeListSearchItems[]> {
+  const baseUrl = serviceBaseUrl(baseUrlEnvironmentVariable, defaultBaseUrl);
+  const response = await ndcRequest(context, credentialName, {
+    method: 'GET',
+    url: `${baseUrl}${catalogPath}`,
+  });
+  return dataProductOptions(response);
+}