theme.js

// helper for all templates.
Handlebars.registerHelper("site", function(){
      return Site.findOne({}); // Missing the query for the collection here.  Need to narrow it down.
});

Handlebars.registerHelper("siteTheme", function(){
      site = Site.findOne({}); // See comment on line 3.
      if(typeof site == 'object'){
            Session.set('theme', site.theme);
      }
});



//theme = this._theme; // Help here. 
//Session.set("theme", theme);

// Add theme class to html

siteTheme0 = function(){
  $('html').addClass('theme0');
};
siteTheme1 = function(){
  $('html').addClass('theme1');
};
siteTheme2 = function(){
  $('html').addClass('theme2');
};
siteTheme3 = function(){
  $('html').addClass('theme3');
};


// Change theme on change to db

Deps.autorun(function (c) {

  if (Session.equals("theme", "1")){
    siteTheme1();
  }
  else if (Session.equals("theme", "2")){
    siteTheme2();
  }
  else if (Session.equals("theme", "3")){
    siteTheme3();
  }
  else {
    Session.set("theme", "0");
    siteTheme0();
  }
});