Generators - tiny rewrite

Original

express.use(function(req, res, next){
			res.results = new app.results();
			var send = function(data){
				res.json(data);
			};
			console.log('are we hijacking?', res.results);
			res.results.on('error', send);
			res.results.on('fail', send);
			res.results.on('success', send);
			next();
		});

WithKoa

koa.use(function *(next){
  //TODO - res.results isnt available here 
  res.results = new app.results(); //TODO will need to be inject another way
  var send = function(data){
    res.json(data)
    return yield next;
  }
  res.results.on('error', send);
  res.results.on('fail', send);
	res.results.on('success', send);
});
//i would probably rewrite results to be independent generators 
//TODO one for success
//TODO one for error
//TODO one for fail 

//perhaps you'd want to log events somewhere else (stream to log system)