/**
 * @author Ryan Johnson <ryan@livepipe.net>
 * @copyright 2007 LivePipe LLC
 * @package Object.Event
 * @license MIT
 * @url http://livepipe.net/projects/object_event/
 * @version 1.0.0
 */

Object.Event = {
        extend: function(object){
                object._objectEventSetup = function(event_name){
                        this._observers = this._observers || {};
                        this._observers[event_name] = this._observers[event_name] || [];
                };
                object.observe = function(event_name,observer){
                        if(typeof(event_name) == 'string' && typeof(observer) != 'undefined'){
                                this._objectEventSetup(event_name);
                                if(!this._observers[event_name].include(observer))
                                        this._observers[event_name].push(observer);
                        }else
                                for(var e in event_name)
                                        this.observe(e,event_name[e]);
                };
                object.stopObserving = function(event_name,observer){
                        this._objectEventSetup(event_name);
                        this._observers[event_name] = this._observers[event_name].without(observer);
                };
                object.notify = function(event_name){
                        this._objectEventSetup(event_name);
                        var collected_return_values = [];
                        var args = $A(arguments).slice(1);
                        try{
                                for(var i = 0; i < this._observers[event_name].length; ++i)
                                        collected_return_values.push(this._observers[event_name][i].apply(this._observers[event_name][i],args) || null);
                        }catch(e){
                                if(e == $break)
                                        return false;
                                else
                                        throw e;
                        }
                        return collected_return_values;
                };
                if(object.prototype){
                        object.prototype._objectEventSetup = object._objectEventSetup;
                        object.prototype.observe = object.observe;
                        object.prototype.stopObserving = object.stopObserving;
                        object.prototype.notify = function(event_name){
                                if(object.notify){
                                        var args = $A(arguments).slice(1);
                                        args.unshift(this);
                                        args.unshift(event_name);
                                        object.notify.apply(object,args);
                                }
                                this._objectEventSetup(event_name);
                                var args = $A(arguments).slice(1);
                                var collected_return_values = [];
                                try{
                                        if(this.options && this.options[event_name] && typeof(this.options[event_name]) == 'function')
                                                collected_return_values.push(this.options[event_name].apply(this,args) || null);
                                        for(var i = 0; i < this._observers[event_name].length; ++i)
                                                collected_return_values.push(this._observers[event_name][i].apply(this._observers[event_name][i],args) || null);
                                }catch(e){
                                        if(e == $break)
                                                return false;
                                        else
                                                throw e;
                                }
                                return collected_return_values;
                        };;
                }
        }
};