A Chatbot for Facebook Page.

1. Create a Facebook Page.

2. Get the access token and verify token from the Facebook page.

3. On the Webhooks panel, subscribe to the messages.

4. On the Messenger panel, under the Settings, fill in the Callback URL and Verify token. For example:

   • Callback URL: https://weesan.serveo.net/webhook
   • Verify token: TOKEN

$ ssh -R weesan:80:localhost:5000 serveo.net

$ export ACCESS_TOKEN="..."
$ export VERIFY_TOKEN="TOKEN"
$ ./chatbot

1. Go the Facebook page or use the Facebook Messenger.
2. Search for the Facebook page.
3. Start chatting with the chatbot.

For example:

Me:  Hi
Bot: Greetings!  Welcome to ELSA!
Bot: To search for a product, please type its name!
Me:  red nike tennis shoes

Bot: Which store?
Me:  Nike

Bot: What category?
Me:  Shoes

Bot: Which store?
Me:  Nike

Bot: <show a list of matched shoes from Nike store>