index.js

(function (root, factory) {
  // AMD
  if (typeof define === 'function' && define.amd) {
    define(['backbone', 'mustache'], factory);
    // CommonJS
  } else if (typeof module === 'object' && module.exports && require) {
    module.exports = factory(require('backbone'), require('mustache'));
    // Globals
  } else {
    /* eslint-disable no-param-reassign */
    root.Auth = factory(root.Backbone, root.Mustache);
    /* eslint-enable no-param-reassign */
  }
})(this, function (Backbone, Mustache) {
  'use strict';

  /**
   * Authorization Backbone Model
   */
  return Backbone.Model.extend({
    // Method called when authorization model is initialized with new constructor
    initialize: function () {
      var self = this;

      // define default mustache render at initialization
      var defaultRender = Mustache.render;

      // Monkey-patch Mustache render to include on all views the
      //  authorizations (_auth_)
      /* eslint-disable no-param-reassign */
      Mustache.render = function (template, view) {
        if (!view) {
          return defaultRender.apply(this, [template, {
            _auth_: self.attributes
          }]);
        }
        view._auth_ = self.attributes;
        return defaultRender.apply(this, arguments);
      };
      /* eslint-enable no-param-reassign */
    },
    /**
     * Overides default set of attributes to allow for setting an array of
     * authorizations (strings) that will be parsed to an object of
     * authorizations as key and true for value
     */
    set: function () {
      var args = Array.prototype.slice.call(arguments);
      // checks if attributes are an array
      if (args[0] instanceof Array) {
        // clean up old authorizations
        this.clear();
        var data = {};
        // build object from array
        args[0].forEach(function (key) {
          data[key] = true;
        });
        // overwrite attributes
        args[0] = data;
      }
      // applies new arguments to default set function
      Backbone.Model.prototype.set.apply(this, args);
    }
  });
});