A Redux middleware to broadcast state (actions + data) using Firebase (http://d.pr/v/13oMK)

firesync.js

import Rebase from 're-base';

const endPoint = 'actions';
const firebaseUrl = 'https://firesync.firebaseio.com';
const client = String(Date.now() + Math.random() * 100);
const data = [];
let initiated = false;
const base = Rebase.createClass(firebaseUrl);

function firesync (store) {

  if (!initiated) {
    base.listenTo(endPoint, {
      context: {},
      asArray: true,
      then(newData) {
        newData.filter(item => item.client !== client)
          .forEach(item => {
            store.dispatch({...item.data, client});
          });
      }
    });

    initiated = true;
  }

  return next => action => {
    const value = next(action);

    if (!value.client) {
      base.post(endPoint, {
        data: [...data, {
          client,
          ts: Date.now(),
          data: value
        }]
      });
    }
    return value;
  };
}

export default firesync;