generatePoem.js

var names = [
  'Catherine',
  'Brenda',
  'Cecilia',
  'Grazy',
  'Artem',
  'Sage',
  'Vanessa',
  'Hoon',
  'Dannisa',
  'Nya',
  'Patty',
  'Gabe',
  'Monique',
  'Ozlem'
]

var nouns = [
  'action',
  'work',
  'noise',
  'desolation',
  'death',
  'life',
  'love',
  'faith',
  'anger',
  'exhaustion',
  'street',
  'sidewalk',
  'corner',
  'door',
  'window',
  'hood',
  'slum',
  'skyscraper',
  'car',
  'truck',
  'guy',
  'girl',
  'job',
  'flower',
  'light',
  'cigarette',
  'rain',
  'jackhammer',
  'driver',
  'worker',
]

var verbs = [
  'get',
  'grab',
  'shove',
  'love',
  'desire',
  'buy',
  'sell',
  'fight',
  'hustle',
  'drive',
]

var adjectives = [
  'big',
  'small',
  'old',
  'fast',
  'cold',
  'hot',
  'dark',
  'dusty',
  'grimy',
  'dry',
  'rainy',
  'misty',
  'noisy',
  'faceless',
  'dead',
];


function lazyGenerateRhymes (words, rhymesObj) {
  const API_URL = 'http://rhymebrain.com/talk?function=getRhymes&word=';
  words.forEach(function(word){
    fetch(API_URL + word).then(function(rhyme){
      rhyme.text().then(function(rhymeBody){
        var index = Math.round( Math.random() * 5 );
        rhymesObj[word] = JSON.parse(rhymeBody)[index].word;
      });
    });
  });
}


function chooseRandomWord(list){
  var index = Math.round(Math.random() * list.length - 1);
  return list[index];
}


function generatePoem(names, nouns, verbs, adjectives) {
  var rows = [];
  var prevNoun = chooseRandomWord(nouns);
  names.forEach(function(name, i){
    if (i === 0) {
      return '';
    }
    if (i % 2) {
      prevNoun = chooseRandomWord(nouns);
      rows.push([
        name,
        chooseRandomWord(verbs),
        chooseRandomWord(adjectives),
        prevNoun,
      ].join(' '));
    }
    else {
      rows.push([
        name,
        chooseRandomWord(verbs),
        chooseRandomWord(adjectives),
        rhymesObj[prevNoun],
      ].join(' '));
    }
  });
  return rows.join('\n');
};


var rhymesObj = {};
lazyGenerateRhymes(nouns, rhymesObj);


generatePoem(names, nouns, verbs, adjectives);