intercept push notification and do something if app is open

can you intercept a push notification if you app is open, so that you can get the message sent using the notification and perform some task. How can this be implemented in titanium?

After you register (in my example for Urban Airship), when a Push comes in you get a callback, I deal with it like this:

function messageCallback(e) {
     var message;
     Ti.API.info('messageCallback e:' + JSON.stringify(e));
     if(e.data.aps != undefined) {
          if(e.data.aps.alert != undefined){
               if(e.data.aps.alert.body != undefined){
                    message = e.data.aps.alert.body;
               } else {
                    message = e.data.aps.alert;
               };
          } else {
               message = 'No Alert content';
          };
     } else {
          message = 'No APS content';
     };
     var alertDialog = Titanium.UI.createAlertDialog({
        title:'Notification', message:message, buttonNames: ['OK']
     });
     alertDialog.show();
};

Bear in mind Apple does not let you send data in the push notification, it's only really a prompt for the user to open the app.. From inside the app, I suppose you could call a web-service to find for that UserID what the message was all about and react..

Apple's reason for not allowing data apparently is that a push notification is not guaranteed to reach a device therefore cannot be relied upon in that way..