# Add products from an external catalog

To integrate an external catalog into Rubens Room Designer and add products seamlessly to your design scenes, follow these steps:

1. **Attach Events to Product Cards:** Before you can make products interact from the external catalog to the Room Designer, ensure that you attached the proper events to it like `insertProduct` event, See the sample script below.
2. **Provide Event Data:** you must adhere to the following API structure. This structure specifies the format for the message object that will be sent to the Room Designer, including the `eventType` and `payload` fields, which includes the productId.

{% code lineNumbers="true" %}

```
export interface MessageEventData {
  eventData: {
    eventType: 'insertProduct';
    payload: {
      productId: string;
    };
  };
}

```

{% endcode %}

3. **Ensure CORS Compatibility:** Make sure that the external catalog is embeddable. For more information see [CORS Integration Guide](/rubens/rubens-products/rubens-room-designer/integration/handle-cors.md)

### **Integration Example**

You can use the following code as a reference for implementing interaction features with the Room Designer. This script adds necessary actions based on the `data-product-id` attribute to handle product addition to the Room Designer scene. Customize this script to meet your specific requirements:

{% code lineNumbers="true" %}

```javascript
const EVENTS_MAP = {
        CLICK: { eventName: "insertProduct", nativeEventName: "click" }
      };

      const sendEvent = (eventType, productId) => {
        const parentWindow = window.parent;
        if (parentWindow) {
          const eventData = {
            eventType,
            payload: {
              productId
            }
          };
          parentWindow.postMessage({ eventData }, "*");
        }
      };

      const addEventHandlers = ({ eventName, nativeEventName }) => {
        const elementsWithEvent = document.querySelectorAll(
          `[data-product-id]`
        );
        elementsWithEvent.forEach((element) => {
          const productId = element.getAttribute("data-product-id");
          const eventHandler = (event) => {
            sendEvent(eventName, productId);
          };

          element.addEventListener(nativeEventName, eventHandler);
        });
      };

      const removeEventHandlers = ({ nativeEventName }) => {
        const elementsWithEvent = document.querySelectorAll(
          `[data-product-id]`
        );
        elementsWithEvent.forEach((element) => {
          if (element.eventHandler) {
            element.removeEventListener(nativeEventName, element.eventHandler);
            delete element.eventHandler;
          }
        });
      };

      const addClickHandlers = () => {
        addEventHandlers(EVENTS_MAP.CLICK);
      };

      const removeEventListeners = () => {
        removeEventHandlers(EVENTS_MAP.CLICK);
      };

      window.addEventListener("load", () => {
        addClickHandlers();
      });

      window.addEventListener("beforeunload", removeEventListeners);
```

{% endcode %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.roomle.com/rubens/rubens-products/rubens-room-designer/customisation/add-products-from-an-external-catalog.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.