Navigating to a different intent within the DialogFlow Messenger fulfillment can be done by utilizing the 'agent.setFollowupEvent(targetIntentEventName)' method

I am currently exploring ways to initiate another DialogFlow Intent (using its event) from a webhook server built with node.js. This will occur after gathering the user's email address, verifying their registration status by sending a POST API request to an external organization's server.

Here is a basic scenario:

User: Hi!
Chatbot: Hello, I am here to assist you. Can you please provide me with your email address for registration verification?
User: [email protected]
Chatbot: Thank you. Let me check your registration status...
---> The fulfillment code will send a POST API request and receive the user's registration status if there is a match.

Based on the user's status, I aim to trigger a new intent: either Registered_Users_Intent or New_Users_Intent. While attempting to achieve this, I have experimented with the 

agent.setFollowupEvent(({ "name": "targetIntentEventName" })
method, but it does not consistently activate the desired intent. I am uncertain about how to properly implement this in the fulfillment code to ensure consistent functionality.

If anyone has any suggestions or helpful resources to aid in resolving this issue, I would greatly appreciate it.

javascriptnode.jsdialogflow-esdialogflow-es-fulfillment

Answer №1

When making a webhook fulfillment request, ensure that your API responds with a JSON format recognized by Dialogflow. Rather than calling dialogflow APIs to trigger events from within your webhook API, include the name of the event in the JSON response for Dialogflow to handle automatically.

To learn more about triggering follow-up events with fulfillment responses, visit: https://cloud.google.com/dialogflow/es/docs/fulfillment-webhook#event

The reason why your current approach may work inconsistently is likely due to the race condition created when using dialogflowv2 APIs to trigger events while not including the name of the follow-up event in the JSON response.

Answer №2

If you are utilizing the Dialogflow Fulfillment Library, ensure that you have the most up-to-date version specified in your package.json file. When using the agent.setFollowupEvent() method, remember to include an agent.add() method for the response. Although this response will not be displayed, it is necessary for the functionality of the agent.setFollowupEvent() method.

For instance:

function functionName(agent) {
    agent.add(`example response`);
    agent.setFollowupEvent('event_name');
}

To learn more about the Dialogflow Fulfillment Library, visit this link. Please note that this library is no longer actively maintained.

Alternatively, you can create your own code and host it on a preferred web server. Through this method, you can trigger events by setting the followupEventInput field of the WebhookResponse. Refer to this page for additional details.

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