Creating a store

As we learned earlier, stores manage data in your Flux architecture. They provide that data to the React components. We're going to create a simple store that manages a new tweet that our application receives from Twitter.

Create new folder called stores in our project's ~/snapterest/source/stores directory. Then, create the TweetStore.js file in it:

var AppDispatcher = require('../dispatcher/AppDispatcher');
var EventEmitter = require('events').EventEmitter;
var assign = require('object-assign');

var tweet = null;

function setTweet(receivedTweet) {
  tweet = receivedTweet;
}

function emitChange() {
  TweetStore.emit('change');
}

var TweetStore = assign({}, EventEmitter.prototype, {

  addChangeListener: function (callback) {
    this.on('change', callback);
  },

  removeChangeListener: function (callback) {
    this.removeListener('change', callback);
  },

  getTweet: function () {
    return tweet;
  }

});

function handleAction(action) {
  if (action.type === 'receive_tweet...