Simple Plugin for "Uptime" that send alerts via Pushover. I am not a Node hacker ... I barely understand why this code works .... but it does. I have not tried it with multiple users yet, so dont know if it will work to do multiple notifications. Let me know if you try it.

index.js

/**
 * Pushover plugin for the uptime project - https://github.com/fzaninotto/uptime
 * Thanks to DMathieu for the Campfire plugin which I basically hacked up to make this  
 * work:  https://gist.github.com/dmathieu/5592418
 * 
 * This index.js files goes to a directory `plugins/pushover` in your installation of uptime.
 *
 * Notifies all events (up, down, paused, restarted) to pushover
 *
 * This plugin has a dependency on `pushover-notifications`.
 * Add this to the "dependencies" object in your `package.json` file :
 *
 *   "pushover-notifications":    "0.1.5"
 *
 *
 * To enable the plugin, add the following line to the plugins section of your config file
 * plugins:
 *  - ./plugins/pushover
 *
 * Example configuration
 *
 *   pushover:
 *     token: 8973lkhjfdso8y3 # Authentication token from pushover for app
 *     user: 09r4ljfdso98r # This is the user token you want to send to
 *
 *     event:
 *       up:        true
 *       down:      true
 *       paused:    false
 *       restarted: false
 */
var config     = require('config').pushover;
var CheckEvent = require('../../models/checkEvent');
var pushover   = require('pushover-notifications');
 
exports.initWebApp = function() {
 
  CheckEvent.on('afterInsert', function(checkEvent) {
    if (!config.event[checkEvent.message])
      return;
 
    checkEvent.findCheck(function(err, check) {
      if (err)
        return console.error(err);
 
     var msg = {
        message: "The application " + check.name + " just went to status " + checkEvent.message,
        title: "Uptime Status",
        sound: 'magic', // optional
        priority: 1 // optional
      };

      var push     = new pushover({ 
          token: config.token
      });

      push.user    = config.user;
      
      push.send( msg, function( err, result ) {
        if ( err ) {
                throw err;
        }
        console.log( result );
        });

 
    });
  });
  console.log('Enabled Pushover notifications');
};

This is great, event without understanding why this code works, it's working perfectly for me, thanks !!