fluorine-orchestra/es/util/combineStores.js

A data orchestration layer for Fluorine

import _Object$keys from 'babel-runtime/core-js/object/keys';
/* eslint prefer-rest-params: 0 */

import invariant from 'invariant';
import { Observable } from 'rxjs';
import isObservable from 'fluorine-lib/lib/util/isObservable';

export default function combineStores(stores) {
  invariant(typeof stores === 'object', 'combineStores: `stores` is expected to be an object containing Observables.');

  var keys = _Object$keys(stores);

  return Observable.combineLatest.apply(Observable, keys.map(function (key) {
    var store = stores[key];

    invariant(isObservable(store), 'combineStores: `stores` is expected to contain Observables only.');

    return store;
  }).concat([function () {
    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    var state = {};

    args.forEach(function (arg, index) {
      var key = keys[index];
      state[key] = arg;
    });

    return state;
  }]));
}