endpoint.ts

// This will have to be hosted by you elsewhere, maybe as a cloud function..!

const checkIfSessionHasARecentFlightBooking = (sessionId) => {
  // ...
}

export const checkStatus = (req, res) => {
  const { sessionId } = req.body
  return res.json({
    set: {
      recentlyBooked: checkIfSessionHasARecentFlightBooking(sessionId)
    }
  })
}

narrative.ts

import { BotTurn } from "narratory"
import * as nlu from "./nlu"

const queryHelp: BotTurn = {
  say: {
    text: "Hi, I am your travel partner. How can I help?",
    suggestions: ["Book a flight", "Book a room"],
  },
  user: [
    {
      intent: nlu.BookRoomIntent,
      bot: {
        // First we query this endpoint to see the status (see third file)
        url: "https://endpoint-to-check-if-recently-booked.com/checkStatus",
        bot: [
          {
            // If recently booked (this variable is set from the backend), we ask if we want a room for the same location
            cond: { recentlyBooked: true },
            say: "Do you want to book a room for _flightLocation",
            user: [
              {
                intent: nlu.Yes,
                bot: {
                  say: "Great!",
                  set: { roomLocation: "_flightLocation" },
                },
              },
              { intent: nlu.No, bot: "Okay!" },
            ],
          },
          {
            // If no recent booking, we just confirm the user's intent and then move to the next turn in the dialog below
            say: "Booking a room it is",
          },
        ],
      },
    },
  ],
}


const queryLocation: BotTurn = {
  // We only ask this question if we haven't already set the roomLocation
  cond: { roomLocation: true },
  say: "What is the destination?",
  user: [
    {
      intent: nlu.LocationIntent,
      bot: {
        say: "Okay, _location it is",
        set: { roomLocation: "_location" },
      },
    },
  ],
}

// Our narrative, ie sequence of bot turns
export const narrative = [queryHelp, queryLocation]

nlu.ts

import { Intent, entities } from "narratory"

export const BookRoomIntent: Intent = {
  examples: ["I want to book a room", "booking a room", "I want a room"],
}

export const LocationIntent: Intent = {
  entities: {
    // Built in Dialogflow entity
    location: entities.geoCity,
  },
  examples: ["_location", "the destination is _location"],
}