registering methods on app in a middleware

bla.js

//That's your middleware code
function myMiddleware(app){

  var myVar = 42; //Put middleware-wide vars in the closure.
  
  var actualMiddleware = function(req, res, next){

    //Do stuffs here

    next();
  }

  var UtilityMethods = {
    method1 : function(){
      return myVar;
    },

    method2 : function(){
      return "John";
    }
  }

  //That's when you make your stuffs accessible from the app object.
  app.MySuperNamespace = UtilityMethods;

  //And that's the middleware that will run on all your paths.
  return actualMiddleware;
}


app.use(myMiddleware(app));

app.MySuperNamespace.method1(); //<- that will return 42...
app.MySuperNamespace.method2(); //<- that will return "John"...