/*
 * jQuery Extended JSon Cookie Plugin
 * relese 2010-01-11
 *
 * It is licensed as free software under the terms of the GNU General Public License (GPL)
 * http://www.gnu.org/licenses/gpl.html
 *
 * This plugin is based on Jquery Cookie plugin http://plugins.jquery.com/project/cookie
 * 
 * Work by Rodolphe Franceschi
 */
 

// Class definition 
function jQueryextendedjsoncookieUtils()
{

}

/* Fonction de compatibilite avec la librairie initiale */
jQueryextendedjsoncookieUtils.corewritefunction = function(argss)
{
  var name = argss[0];
  var value = argss[1];
  
  document.cookie = name + '=' + encodeURIComponent(value) + '; path=/';
}

/* Simple deletion of the cookie */
jQueryextendedjsoncookieUtils.removeCookie = function(argss)
{
  var cookiename = argss[0];

  varcookievalue = jQueryextendedjsoncookieUtils.getCookieValueDecoded( argss )
  if ( varcookievalue != undefined )
  {
    document.cookie = cookiename +'=; expires=Thu, 01-Jan-70 00:00:01 GMT; path=/';
  } 
}

/* Simple write of all the cookie content with an empty value */
jQueryextendedjsoncookieUtils.writeEmptyCookie = function(argss)
{
  var cookiename = argss[0];

  document.cookie = cookiename + '=; path=/';
}

/* Simple write of all the cookie content */
jQueryextendedjsoncookieUtils.writeCookie = function(argss)
{
  jQueryextendedjsoncookieUtils.corewritefunction(argss);
}


/* Get the cookie value encoded */
jQueryextendedjsoncookieUtils.getCookieValue = function(argss)
{
  var cookiename =  argss[0];

  var fullcookievalue = jQueryextendedjsoncookieUtils.getFullCookie(argss);
  if (fullcookievalue == undefined)
  {
    return undefined;
  }
  return fullcookievalue.substring(cookiename.length + 1);
}

/* get The cookie valude decoded */
jQueryextendedjsoncookieUtils.getCookieValueDecoded = function(argss)
{
  var cookievalue = jQueryextendedjsoncookieUtils.getCookieValue(argss);
  if (cookievalue == undefined) {return undefined; };
  return decodeURIComponent(cookievalue);
}


/* Get the value of a cookie by cookie name*/
jQueryextendedjsoncookieUtils.getFullCookie = function(argss)
{
  var cookiename = argss[0];

  var cookieValue = undefined;
  var componentValueOutput = undefined;

  if (document.cookie && document.cookie != '')
  {
    var cookies = document.cookie.split(';');
    for (var i = 0; i < cookies.length; i++)
    {
      var cookie = jQuery.trim(cookies[i]);
   
      if (cookie.substring(0, cookiename.length + 1) == (cookiename + '='))
      {
        componentValueOutput = cookie;
        break;
      }
    }
  }
  return componentValueOutput;
}

/*
 * Advanced function thar stores Extended attributes (not value).
 * Warning, This function must be called AT THE END OF THE CALLS
 */
jQueryextendedjsoncookieUtils.setExtendedAttributes = function(argss)
{
  var cookiename = argss[0];
  var extendedattributesarray = argss[1];

  var cookvalue = jQueryextendedjsoncookieUtils.getCookieValueDecoded(argss);
  var argstopass = Array(cookiename, cookvalue, extendedattributesarray);

  jQueryextendedjsoncookieUtils.corewritefunction(argstopass);
}

/*
 * Function that gets a variale Value from a cookie
 */
jQueryextendedjsoncookieUtils.getCookieVariable = function(argss)
{
  var cookiename = argss[0];
  var variablename = argss[1];

  var cookvalue = jQueryextendedjsoncookieUtils.getCookieValueDecoded(argss);
  if (cookvalue != '' && cookvalue != undefined)
  {
    jsonoutput_eval = jQuery.evalJSON(cookvalue);
    return jsonoutput_eval[variablename];
  }

  return undefined;
}


/*
 * Advanced function that stores a variable in the value of the cookie in Json data exchange format
 */
jQueryextendedjsoncookieUtils.setCookieVariable = function(argss)
{
  var cookiename = argss[0];
  var variablename = argss[1];
  var variablevalue = argss[2];

  var jsonoutput = undefined;

  // First, get the cookie value
  var cookvalue = jQueryextendedjsoncookieUtils.getCookieValueDecoded(Array(cookiename));

  // if cookie value is undefined, write empty cookie then set the variable
  if ( (cookvalue == undefined) || (cookvalue == '') )
  {
    jQueryextendedjsoncookieUtils.writeEmptyCookie(Array(cookiename));

    var variableunique = new Object();
    variableunique[variablename] = variablevalue;

    var chainejsonencoded = jQuery.toJSON(variableunique);

    var argstopass = new Array();
    argstopass.push(cookiename);
    argstopass.push(chainejsonencoded);

    jQueryextendedjsoncookieUtils.writeCookie(argstopass);
  }
  else
  {
    // else, add the variable to the cookie
    jsonoutput_eval = jQuery.evalJSON(cookvalue);
    jsonoutput_eval[variablename] = variablevalue;
    var chainejsonencoded = jQuery.toJSON(jsonoutput_eval);

    var argstopass = new Array();
    argstopass.push(cookiename);
    argstopass.push(chainejsonencoded);

    jQueryextendedjsoncookieUtils.writeCookie(argstopass);
  }
}

// JQuery Interface
// We assume that first argument is method name....
jQuery.extendedjsoncookie = function()
{
  // We forge dynamic call chain
  var chain = "jQueryextendedjsoncookieUtils.";
  var internalargs = new Array();
  for (var i=0; i < arguments.length; i++)
  {
     var thisarg = arguments[i];
     if (i == 0)
     {
       chain = chain + thisarg;
     }
     else
     {
       internalargs.push(thisarg);
     }
  }
  
  // We make an eval on it
  return eval(chain) ( internalargs );
};