/**
 * "Happy Birthday Nenad" OpenSocial Script
 * UNTESTED
 * Probably won't work in most OpenSocial containers
 * due to privacy settings
 */

var NENADS_USER_ID = '<UserId>'; // eg. VIEWER

var req = opensocial.newDataRequest();
var params = {};

params[opensocial.DataRequest.PeopleRequestFields.PROFILE_DETAILS] = [opensocial.Person.Field.BIRTHDAY];

req.add(req.newFetchPersonRequest(NENADS_USER_ID, params), "nenad"));
req.send(function(data) {
  var profileData = data.get("nenad").getData();
  var today = new Date();
  var birthday = profileData.getField(opensocial.Person.Field.BIRTHDAY);
  bithday = createDateObject(birthday);
  if (birthday.getDate() == today.getDate() && birthday.getMonth() == today.getMonth()) {
    alert("Dude seems like it's your big day. You better shout out a few drinks when you're back in the office!");
  } else {
    alert("Today is not your birthday!");
  }
});

/**
 * Expects a dateStr like "31-12-2009"
 */
function createDateObject(dateStr) {
  var dateObj = new Date();
  var dateArr = dateStr.split("-");

  var day = dateArr[0];
  var month = dateArr[1] - 1; // (0 => January, 1 => February, ...)
  var year = dateArr[2];

  with (dateObj) {
    setMonth(month);
    setDate(day);
    setYear(year);
  }

  return dateObj;
}