installNSBundleHook.js

var $ = require('NodObjC');

module.exports = function installNSBundleHook() {
  var cls = $.NSBundle;

  if (cls) {
    var bundleIdentifier = cls.getInstanceMethod('bundleIdentifier');
    bundleIdentifier.setImplementation(function(val) {
      return $('com.tinyspeck.slackmacgap');
    });
    return true;
  }
  return false;
};

MyAwesomeNSUserNotificationCenterDelegate.js

var $ = require('NodObjC');

module.exports = function(props){
  var NSUserNotificationCenterDelegate = $.NSObject.extend('NSUserNotificationCenterDelegate');

  NSUserNotificationCenterDelegate.addMethod('init', { retval: '@', args: ['@', ':'] }, function(self) {
    $.NSUserNotificationCenter('defaultUserNotificationCenter')('setDelegate', self);

    return self;
  });

  NSUserNotificationCenterDelegate.addMethod('sendNotificationWithTitle:withInfo:andSoundNamed:', {
    retval: 'v',
    args: ['@', ':', '@', '@', '@']
  }, function(self, methodName, title, informativeText, soundName) {
    console.log(arguments);
    var center = $.NSUserNotificationCenter('defaultUserNotificationCenter');
    var notification = $.NSUserNotification('alloc')('init');
    notification('setTitle', title);
    notification('setInformativeText', informativeText);
    notification('setSoundName', soundName);

    center('deliverNotification', notification);
  });

  NSUserNotificationCenterDelegate.addMethod('userNotificationCenter:didActivateNotification:', {
    retval: 'v',
    args: ['@', ':', '@', '@']
  }, function(self, e, center, notification) {
    console.log('CLICKED');
    props.onClick && props.onClick(notification);
  });

  NSUserNotificationCenterDelegate.addMethod('userNotificationCenter:shouldPresentNotification:', {
    retval: 'v',
    args: ['@', ':', '@', '@']
  }, function(self) {
    return true;
  });

  var center = NSUserNotificationCenterDelegate('alloc')('init');
  return center;
}

notification.js

var $ = require('NodObjC');
$.import('Cocoa');

var createMyAwesomeNSUserNotificationCenterDelegate = require('./MyAwesomeNSUserNotificationCenterDelegate');
var installNSBundleHook = require('./installNSBundleHook');

function main(){
  installNSBundleHook();
  var pool = $.NSAutoreleasePool('alloc')('init');

  var center = createMyAwesomeNSUserNotificationCenterDelegate({
    onClick: function(notification){
      console.log('clicked', notification);
      center('sendNotificationWithTitle', $('Clicked!'),
                              'withInfo', $(''),
                         'andSoundNamed', $('NSUserNotificationDefaultSoundName'));
    }
  });

  center('sendNotificationWithTitle', $('Hello Objective-C World'),
                          'withInfo', $('from NodObjC'),
                     'andSoundNamed', $('NSUserNotificationDefaultSoundName'));

  setInterval(function(){
    $.NSRunLoop('mainRunLoop')('runUntilDate', $(new Date(Date.now() + 100)));
  }, 100);
}

main();

package.json

{
  "name": "NodObjC-notification-example",
  "version": "0.0.1",
  "dependencies": {
    "NodObjC": "0.0.15"
  }
}