Random panda trivia webhook

index.js

const { conversation } = require('@assistant/conversation');
const functions = require('firebase-functions');
const app = conversation();

// ************
// panda trivia
// ************
app.handle('panda_handle', conv => {

  // create a variable to hold the response
  var response = "";
  
  // create an array of panda trivia
  var trivia = [
    "Pandas rely on spatial memory, not visual memory.",
    "A panda’s paw has six digits - five fingers and an opposable pseudo-thumb (actually an enlarged wrist bone) it uses merely to hold bamboo while eating.",
    "A newborn panda cub is 1/900th the size of its mother and is comparable to the length of a stick of butter.",
    "The first panda came to the United States in 1936—a cub to a zoo in Chicago. It took another 50 years before the States would see another.",
    "Approximately 99 percent of a panda’s diet—bamboo leaves and shoots—is void of much nutritional value. Its carnivore-adapted digestive system cannot digest cellulose well, thus it lives a low-energy, sedentary lifestyle but persists in eating some 60 species of bamboo. Pandas must eat upwards of 30 pounds of bamboo daily just to stay full."  
  ];
  
  // generate a random number between 0 and 4
  // 5 = the number of lines in the array
  const randomNum = Math.floor(Math.random() * 5);

  // add the random trivia line to the response
  response += trivia[randomNum];

  // add the response to the conversation
  conv.add(response);
  
});

exports.ActionsOnGoogleFulfillment = functions.https.onRequest(app);