feat(vertexai): Add sample retail_v2_search_offset

Author: amcolin

vertexai/retail/search_offset.go

@@ -0,0 +1,67 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package retail
+
+import (
+	"context"
+	"fmt"
+
+	retail "cloud.google.com/go/retail/apiv2"
+
+	retailpb "cloud.google.com/go/retail/apiv2/retailpb"
+	"google.golang.org/api/iterator"
+)
+
+// [START retail_v2_search_offset]
+// searchOffset method searches for products with an offset using Vertex AI Search for commerce.
+//
+// Performs a search request starting from a specified position.
+//
+// projectID: The Google Cloud project ID.
+// query: The search term.
+// visitorID: A unique identifier for the user.
+// offset: The number of results to skip.for products using Vertex AI Search for commerce.
+func searchOffset(projectID, query, visitorID string, offset int32) error {
+	ctx := context.Background()
+
+	client, err := retail.NewSearchClient(ctx)
+	if err != nil {
+		return fmt.Errorf("unable to create client: %w", err)
+	}
+	defer client.Close()
+
+	req := &retailpb.SearchRequest{
+		Placement: fmt.Sprintf("projects/%s/locations/global/catalogs/default_catalog/placements/default_search", projectID),
+		Query:     query,
+		VisitorId: visitorID,
+		PageSize:  10,
+		Offset:    offset,
+	}
+
+	it := client.Search(ctx, req)
+	for {
+		resp, err := it.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			return fmt.Errorf("it.Next: %w", err)
+		}
+		fmt.Printf("Search item: %v\n", resp)
+	}
+	return nil
+}
+
+// [END retail_v2_search_offset]

vertexai/retail/search_offset_test.go

@@ -0,0 +1,33 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package retail
+
+import (
+	"testing"
+
+	"github.com/GoogleCloudPlatform/golang-samples/internal/testutil"
+)
+
+func Test_searchOffset(t *testing.T) {
+	tc := testutil.SystemTest(t)
+
+	query := ""
+	visitorID := "unique-visitor-id"
+	offset := int32(10)
+
+	if err := searchOffset(tc.ProjectID, query, visitorID, offset); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+}

vertexai/retail/search_request.go

@@ -30,8 +30,8 @@ import (
 // Handles both text search (using query) and browse search (using page_categories).
 //
 // projectID: The Google Cloud project ID.
-// visitorID: A unique identifier for the user.
 // query: The search term for text search.
+// visitorID: A unique identifier for the user.
 // pageCategories: The categories for browse search.
 func searchRequest(projectID, query, visitorID string, pageCategories []string) error {
 	ctx := context.Background()