command-queue-module/index.js

Create command queue proxies for modules

(function() {
  function createCommandQueueModule(methodNames, load) {
    const callQueue = [];
    const proxyModule = {};

    function defineMethod(name) {
      proxyModule[name] = function() {
        callQueue.push([name, this, [].slice.call(arguments)]);
      };
    }

    methodNames.forEach(defineMethod);

    function invoke(actualModule) {
      function invokeCommand([name, _this, args]) {
        actualModule[name].apply(_this, args);
      }

      callQueue.push = invokeCommand;
      callQueue.forEach(invokeCommand);
    }

    load(invoke);
    return proxyModule;
  }

  module.exports = createCommandQueueModule;
})();