Event Controller

event-controller-1.0.js

 (function(global){ 
   function EventController(){
    var oEvents = {};

    this.doEvent = function(eventname, args) {
      if(typeof(eventname) !== 'string') {
        return false;
      }

      if(typeof(oEvents[eventname]) === 'object' && Array.isArray(oEvents[eventname])) {
        var aResults = {};
        oEvents[eventname].forEach(function(handler, i){
          if(typeof(handler) === 'function') {
            if(typeof(args) !== 'undefined') {
              aResults[i] = handler(args);
            } else {
              aResults[i] = handler();
            }
          }
        });
        return aResults;
      }

      return false;
    }

    this.addListener = function(eventname, callback) {
      if(typeof(eventname) !== 'string' || typeof(callback) != 'function') {
        return false;
      }

      if(typeof(oEvents[eventname]) === 'object' && Array.isArray(oEvents[eventname])) {
        oEvents[eventname].push(callback);
        return true;
      }

      if(typeof(oEvents[eventname]) === 'undefined') {
        oEvents[eventname] = [callback];
        return true;
      }
      return false;
    }
  }
   
  if(typeof(global.eventController) === 'undefined') {
    global.eventController = new EventController();
  }
})(window);