// Cookie Manager for storing JSON data in a cookie or cookies
// Written by Jason McCreary and taken from
// http://jason.pureconcepts.net/articles/javascript_cookie_object
// 

var Cookie = {
  data: {},
  options: {name:"", expires: 1, domain: "", path: "", secure: false},

		init: function(options, data) {
  		Cookie.options = Object.extend(Cookie.options, options || {});

  		var payload = Cookie.retrieve();
      if(payload) {
         Cookie.data = payload.evalJSON(true); // sanitize with true param 
      }
      else {
         Cookie.data = data || {};
      }
      Cookie.store();
    },
    getData: function(key) {
        return Cookie.data[key];
    },
    setData: function(key, value) {
        Cookie.data[key] = value;
        Cookie.store();
    },
    removeData: function(key) {
        delete Cookie.data[key];
        Cookie.store();
    },
    retrieve: function() {
        var start = document.cookie.indexOf(Cookie.options.name + "=");

        if(start == -1) {
            return null;
        }
        if(Cookie.options.name != document.cookie.substr(start, Cookie.options.name.length)) {
            return null;
        }

        var len = start + Cookie.options.name.length + 1;   
        var end = document.cookie.indexOf(';', len);

        if(end == -1) {
            end = document.cookie.length;
        } 
        return unescape(document.cookie.substring(len, end));
    },
    store: function() {
        var expires = '';

        if (Cookie.options.expires) {
            var today = new Date();
            expires = Cookie.options.expires * 86400000;
            expires = new Date(today.getTime() + expires);
        }

        document.cookie = Cookie.options.name + '=' + escape(Object.toJSON(Cookie.data)) + Cookie.getOptions() + ';expires=' + expires;
    },
    erase: function() {
        document.cookie = Cookie.options.name + '=' + Cookie.getOptions() + ';expires=Thu, 01-Jan-1970 00:00:01 GMT';
    },
    getOptions: function() {
        return (Cookie.options.name ? ';name=' + Cookie.options.name : '') + (Cookie.options.path ? ';path=' + Cookie.options.path : '') + (Cookie.options.domain ? ';domain=' + Cookie.options.domain : '') + (Cookie.options.secure ? ';secure' : '');      
    }
};