/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io,
  
  pageLoaded = false;

  io.util = {

    ios: false,

    load: function(fn){
      if (/loaded|complete/.test(document.readyState) || pageLoaded) return fn();
      if ('attachEvent' in window){
        window.attachEvent('onload', fn);
      } else {
        window.addEventListener('load', fn, false);
      }
    },

    inherit: function(ctor, superCtor){
      // no support for `instanceof` for now
      for (var i in superCtor.prototype){
        ctor.prototype[i] = superCtor.prototype[i];
      }
    },

    indexOf: function(arr, item, from){
      for (var l = arr.length, i = (from < 0) ? Math.max(0, l + from) : from || 0; i < l; i++){
        if (arr[i] === item) return i;
      }
      return -1;
    },

    isArray: function(obj){
      return Object.prototype.toString.call(obj) === '[object Array]';
    },
    
    merge: function(target, additional){
      for (var i in additional)
        if (additional.hasOwnProperty(i))
          target[i] = additional[i];
    }

  };

  io.util.ios = /iphone|ipad/i.test(navigator.userAgent);
  io.util.android = /android/i.test(navigator.userAgent);

  io.util.load(function(){
    pageLoaded = true;
  });

})();