[Generate fake emails] Generate fake emails using randomuser.me and chancejs

generateFakeEmails.js

const Chance = require('chance');
const fetch = require('node-fetch');
const fs = require('fs');
const chance = new Chance();

let users;

const getUsers = async () => fetch('https://randomuser.me/api/?results=8&nat=gb')
  .then(r => r.json())
  .then(({ results }) => results.map(
    ({
      name: { first, last },
      picture: { thumbnail }
    }, index) => ({ id: index + 1, name: `${first} ${last}`, avatar: thumbnail })
  ))
  .then(data => {
    users = data;
  });
  // .then(users => JSON.stringify(users, null, 2))
  // .then(console.log)

const pickUser = () => {
  const idx = Math.floor(users.length * Math.random());
  return users[idx];
}

const genMessage = () => {
  const id = chance.guid();
  const user = pickUser();
  const message = chance.sentence();
  const read = Math.random() > 0.5;
  return { id, user, message, read };
};

const genMessages = (len = 10) => {
  return new Array(len)
    .fill(0)
    .map(genMessage)
};

getUsers()
  .then(users => {
    const messages = genMessages();
    fs.writeFileSync('messages.json', JSON.stringify(messages, null, 2));
  })

package.json

{
  "name": "generate-fake-emails",
  "version": "1.0.0",
  "description": "",
  "main": "generateFakeEmails.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "chance": "^1.0.18",
    "node-fetch": "^2.5.0"
  }
}