DataStore.js

var pubsub = new PubSub();

class DataStore {
  catalogFiles = null,

  init: function() {
    var promise = new $.Promise();
    getCatalogFiles();
  },

  getCatalogFiles() {
    var that = this;
    $.ajax({}).done(function() {
      that.catalogFiles = response.catalog;
      pubsub.publish('datastore.change.catalog_files', that.catalogFiles);
    });
  }
};

var ds = new DataStore;
var dm = null;

pubsub.subscribe('datastore.loadData', function() {
  ds.init();
});

pubsub.subscribe('datastore.change.catalog_files', function(catalogFiles) {
  dm = new DataMapper({
    inFiles = catalogFiles
  });
});