ex5-pokerDiceChain.js

/*------------------------------------------------------------------------------
Full description at: https://github.com/HackYourFuture/Assignments/tree/main/3-UsingAPIs/Week1#exercise-5-throw-dice-sequentially

In the previous exercise we used `Promise.all()` to throw five dice in one go.
In the current exercise we will be throwing five dice one at a time, waiting 
for a die to settle before throwing the next one. Of course, we still consider 
a die rolling off the table to be a showstopper.

To throw the dice sequentially we will be using a _promise chain_. Your job is 
to expand the given promise chain to include five dice.
------------------------------------------------------------------------------*/

// The line below makes the rollDie() function available to this file.
// Do not change or remove it.
import { rollDie } from '../../helpers/pokerDiceRoller.js';

export function rollDice() {
  const results = [];

  return rollDie(1)
    .then((value) => {
      results.push(value);
      return rollDie(2);
    })
   .then((value) => {
      results.push(value);
      return rollDie(3);
    })
    .then((value) => {
      results.push(value);
      return rollDie(4);
    })
    .then((value) => {
      results.push(value);
      return rollDie(5);
    })
    .then((value) => {
      results.push(value);
      return results; // Return all results at the end
    });
}

function main() {
  rollDice()
    .then((results) => console.log('Resolved!', results))
    .catch((error) => console.log('Rejected!', error.message));
}

// ! Do not change or remove the code below
if (process.env.NODE_ENV !== 'test') {
  main();
}
/* 
Explanation:

We throw five dice one by one, waiting for each to finish before throwing the next. 
- If a die finishes normally, its value is added to the results array.
- If a die rolls off the table, the chain stops immediately and the error is caught.

This is different from Promise.all(), because here each die waits for the previous one. 
Even though a die falls off, any dice that haven't started yet never roll.
*/