const EventEmitter = require('events');

const myEmitter = new EventEmitter();

function c2(num) {
  return new Promise((resolve) => {
    resolve(`c2: ${num}`);
  });
}

// eslint-disable-next-line no-underscore-dangle
// eslint-disable-next-line no-console
const doSomeStuff = async (number) => {
  try {
    console.log(`doSomeStuff: ${number}`);
    const r2 = await c2(number);
    console.log(r2);
  } catch (err) {
    throw err;
  }
};

myEmitter.on('eventOne', async (n) => {
  await doSomeStuff(n);
});

myEmitter.emit('eventOne', 1);
myEmitter.emit('eventOne', 2);
myEmitter.emit('eventOne', 3);
myEmitter.emit('eventOne', 4);

doSomeStuff: 1
c2: 1
doSomeStuff: 2
c2: 2
doSomeStuff: 3
c2: 3
doSomeStuff: 4
c2: 4

doSomeStuff: 1
doSomeStuff: 2
doSomeStuff: 3
doSomeStuff: 4
c2: 1
c2: 2
c2: 3
c2: 4