1 files changed, 33 insertions, 0 deletions
diff --git a/src/frontend/pages/api/recommendations.ts b/src/frontend/pages/api/recommendations.ts
new file mode 100644
index 0000000..dd975a9
--- /dev/null
+++ b/src/frontend/pages/api/recommendations.ts
@@ -0,0 +1,33 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { NextApiRequest, NextApiResponse } from 'next';
+import InstrumentationMiddleware from '../../utils/telemetry/InstrumentationMiddleware';
+import RecommendationsGateway from '../../gateways/rpc/Recommendations.gateway';
+import { Empty, Product } from '../../protos/demo';
+import ProductCatalogService from '../../services/ProductCatalog.service';
+
+type TResponse = Product[] | Empty;
+
+const handler = async ({ method, query }: NextApiRequest, res: NextApiResponse<TResponse>) => {
+  switch (method) {
+    case 'GET': {
+      const { productIds = [], sessionId = '', currencyCode = '' } = query;
+      const { productIds: productList } = await RecommendationsGateway.listRecommendations(
+        sessionId as string,
+        productIds as string[]
+      );
+      const recommendedProductList = await Promise.all(
+        productList.slice(0, 4).map(id => ProductCatalogService.getProduct(id, currencyCode as string))
+      );
+
+      return res.status(200).json(recommendedProductList);
+    }
+
+    default: {
+      return res.status(405).send('');
+    }
+  }
+};
+
+export default InstrumentationMiddleware(handler);