How to handle webhook fulfillment in Dialogflow using nodejs

I am looking for some advice on how to design the code to handle the fulfillment of requests sent by Dialogflow to my server. Dialogflow only lets setup a single webhook to handle all the intents. Let's say that I have 5 different intents; all of them will call the same webhook on my server. Now, how can I elegantly manage server-side different workflows depending on the intent? The parameter that I would ideally use to make a distinction is contained in req.body.queryResult.intent.displayName; and indicates the name of the current intent. Right now I have two ideas, using express redirect method using the intent as part of the path, or creating a dictionary of handlers where the intents are the key. Do you have any suggestions?