phaser/v3/src/gameobjects/FactoryContainer.js

/**
* The GameObject Factory is a global level container of Factory instances.
* Factories register themselves with this container (when required)
*
* @class Phaser.GameObject.Factory
* @constructor
* @param {Phaser.Game} game - A reference to the currently running game.
*/

var factories = {};

var FactoryContainer = function ()
{
    this.register = function (factory)
    {
        if (factories.hasOwnProperty(factory.KEY))
        {
            return this.getType(factory.KEY);
        }
        else
        {
            factories[factory.KEY] = {
                add: factory.add,
                make: factory.make
            };

            return factory;
        }
    };

    this.getType = function (key)
    {
        return factories[key];
    };

    this.load = function (dest, isFactory)
    {
        for (var factory in factories)
        {
            if (factories.hasOwnProperty(factory))
            {
                dest[factory] = (isFactory) ? factories[factory].add : factories[factory].make;
            }
        }

        return dest;
    };

    return this;
};

module.exports = FactoryContainer();