NodObjC NSUserNotificationCenter example - inspired by https://github.com/norio-nomura/usernotification/blob/master/usernotification/main.m

notification.js

var $ = require('NodObjC');

$.import('Cocoa');

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

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

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

var NSUserNotificationCenterDelegate = $.NSObject.extend('NSUserNotificationCenterDelegate');

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

  return self;
});

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

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

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

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

var center = NSUserNotificationCenterDelegate('alloc')('init');
var string = $.NSString('stringWithUTF8String', 'Hello Objective-C World!');
console.log(string);
center('sendNotificationWithTitle', string, 'withInfo', string);

$.NSRunLoop('mainRunLoop')('run');