React ES6 Code Samples for Medium #4

Store Pattern.js

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

var CHANGE_EVENT = 'change';

var _elements = {};

function create(obj) {
  _elements[obj.id] = obj;
  ExampleStore.emitChange();
}

function destroy(id) {
  delete _elements[id];
  ExampleStore.emitChange();
}

var ExampleStore = assign({}, EventEmitter.prototype, {
  getAll: function() {
    return _elements;
  },
  getList: function() {
    var res = [];
    for (var key in _elements) {
      res.push(_elements[key]);
    }
    return res;
  }
  emitChange: function() {
    this.emit(CHANGE_EVENT);
  },
  addChangeListener: function(callback) {
    this.on(CHANGE_EVENT, callback);
  },
  removeChangeListener: function(callback) {
    this.removeListener(CHANGE_EVENT, callback);
  }
});

// ... Dispatcher Code ...

module.exports = ExampleStore;