// 'mainbody' is the default division to be displayed
var curdiv = 'mainbody' ;

function checkAndFix ( )
{
   var user = getCookie ( "user" ) ;
   if ( user && user.length > 0 ) {
      displayGreeting() ;
      handle_bar ( "authbar" ) ;

      var winletOpsHtml = getCookie ( "winletOpsHtml" ) ;
      var d = document.getElementById ( "winlet-operations" ) ;
      var s = document.getElementById ( "sideDiv" ) ;
      d.innerHTML = winletOpsHtml ;
      s.style.display = "block" ;
   }
}

function displayGreeting ( )
{
   var uyname = getCookie ( "uyname" ) ;
   var u = document.getElementById ( "uyname" ) ;
   var greeting = uky2uy ( "essalamu eleykum, " ) ;
   u.innerHTML = greeting + uyname ;
}

function handle ( req ) 
{
   if ( req == 'login' || req == 'register' || req == 'mainbody' ) {
      // we don't do anything if login is clicked while it is displayed
      if ( curdiv == req ) {
         return ;
      }

      // hide current div
      var cdiv = document.getElementById ( curdiv ) ;
      cdiv.style.display = 'none' ;

      // make login div visible 
      var ddiv = document.getElementById ( req ) ;
      ddiv.style.display = 'block' ;

      curdiv = req ;
   } else if ( req == 'logout' ) {
      // for logout, we show mainbody, and clean up cookies
      if ( curdiv != 'mainbody' ) {
         var cdiv = document.getElementById ( curdiv ) ;
         cdiv.style.display = 'none' ;

         curdiv = 'mainbody' ;
         var ddiv = document.getElementById ( 'mainbody' ) ;
         ddiv.style.display = 'block' ;
      }
      /*
      var d = document.getElementById ( "winlet-operations" ) ;
      var s = document.getElementById ( "sideDiv" ) ;
      d.innerHTML = "" ;
      s.style.display = "none" ;
      */

      deleteCookie ( "user" ) ;
      deleteCookie ( "pwd" ) ;
      deleteCookie ( "uyname" ) ;
      deleteCookie ( "utype" ) ;
      handle_bar ( 'bar' ) ;
      handle ( 'login' ) ;
   }
}

function handle_bar ( divid ) 
{
   if ( divid == 'authbar' ) {
      var cdiv = document.getElementById ( 'bar' ) ;
      cdiv.style.display = 'none' ;

      // make login div visible 
      var ddiv = document.getElementById ( divid ) ;
      ddiv.style.display = 'block' ;
   } else if ( divid == 'bar' ) {
      var cdiv = document.getElementById ( 'authbar' ) ;
      cdiv.style.display = 'none' ;

      // make login div visible 
      var ddiv = document.getElementById ( divid ) ;
      ddiv.style.display = 'block' ;
   }
}

/*********************** Cookie functions *********************/

function setCookie(name, value, expires, path, domain, secure)
{
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

/*
 * Returns a string containing value of specified cookie,
 *   or null if cookie does not exist.
 */
function getCookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

function deleteCookie(name, path, domain)
{
    if (getCookie(name))
    {
        document.cookie = name + "=" + 
            ((path) ? "; path=" + path : "") +
            ((domain) ? "; domain=" + domain : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}

/**************** End of Cookie functions *********************/