promise pollyfills

promise.js

import { Promise } from 'es6-promise';
import PromiseTry from 'es6-promise-try';
import './async';

if (!Promise.try) {
  Promise.try = PromiseTry;
}

if (!Promise.try) {
  Promise.try = PromiseTry;
}

function hash(obj) {
  const promises = [];
  let index = 0;
  const indexToKey = {};

  for (const key in obj) {
    indexToKey[index] = key;
    promises.push(obj[key]);
    index += 1;
  }

  return Promise.all(promises).then((values) => {
    const obj = {};
    values.forEach((v, i) => {
      obj[indexToKey[i]] = v;
    });
    return obj;
  });
}

if (!Promise.hash) {
  Promise.hash = hash;
}

if (!Promise.props) {
  Promise.props = hash;
}

function join(...args) {
  return Promise.all(args).then(values => Promise.resolve(...values));
}

if (!Promise.join) {
  Promise.join = join;
}

if (typeof global !== 'undefined') {
  global.Promise = Promise;
}