main.js

'use strict';

// brings in the assert module for unit testing
const assert = require('assert');
// brings in the readline module to access the command line
const readline = require('readline');
// use the readline module to print out to the command line
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});



const pigLatin = (word) => {
word = word.toLowerCase().trim()

console.log("Your first letter is " + word [0])


let firstletter = word[0]
let vowels = ["a", "e", "i", "o", "u"]
let vowelPosition = 0

//If it starts with a vowel just add "yay"

if(vowels.includes( firstletter ) == true)
{
  return word + "yay"
//it is a vowel
}

else{

  //not a vowel

  for (let index = 0; index < word.length; index = index + 1) {

  if(vowels.includes(word[index])){

vowelPosition = index

break;
  }
//check each letter to see how many consonants there are in a row

  }


  let finalAnswer = word.slice(vowelPosition) + word.slice(0, vowelPosition) + "ay"
  return finalAnswer

}

}

// the first function called in the program to get an input from the user
// to run the function use the command: node main.js
// to close it ctrl + C
const getPrompt = () => {
  rl.question('word ', (answer) => {
    console.log( pigLatin(answer) );
    getPrompt();
  });
}

// Unit Tests
// to use them run the command: npm test main.js
// to close them ctrl + C
if (typeof describe === 'function') {

  describe('#pigLatin()', () => {
    it('should translate a simple word', () => {
      assert.equal(pigLatin('car'), 'arcay');
      assert.equal(pigLatin('dog'), 'ogday');
    });
    it('should translate a complex word', () => {
      assert.equal(pigLatin('create'), 'eatecray');
      assert.equal(pigLatin('valley'), 'alleyvay');
    });
    it('should attach "yay" if word begins with vowel', () => {
      assert.equal(pigLatin('egg'), 'eggyay');
      assert.equal(pigLatin('emission'), 'emissionyay');
    });
    it('should lowercase and trim word before translation', () => {
      assert.equal(pigLatin('HeLlO '), 'ellohay');
      assert.equal(pigLatin(' RoCkEt'), 'ocketray');
    });
  });
} else {

  getPrompt();

}






// **********
//   HINTS
// **********

// break your code into pieces and focus on one piece at a time...
// 1. if word begins with a vowel send to one function: adds "yay"
// 2. if word begins with a consonant send to another function: splices off beginning, returns word with new ending.
// 3. if multiple words, create array of words, loop over them, sending them to different functions and creating a new array with the new words.