/**
The implementation of client side component of the cookie handler frame work.
The framework provides a wrapper around the cookie which can be used for getting
and setting multiple key value pairs in a single cookie

Methods
1.       getCookieWrapper(cookie_name) 

This method returns a wrapper object for the cookie name specified.If no cookie is there ,
it will create an empty cookie.The properties can be get or set using the dot operator. 
The wrapper object includes a built in object 'options' with the following properties
a.expires, 
b.path, 
c.domain, 
d.secure {These are the options used for creating a new cookie} 
e.empty { empty = true if the wrapper object is empty, empty= false if wrapper object is not empty}


 
2.    commitCookieWrapperChanges(wrapperObject) 

This methods write the new/changed value of the cookie to the browser i.e. it commits the
value of the wrapper object.

3. getStringValueOfCookieWrapper(wrapperObject) 

Returns a  string notation of the wrapperObject.
4.deleteCookieWrapper(wrapperObject)
This method deletes the wrapper object  sets it to null and deletes 
 the  cookie associated with it.
 
Usage: <example>
1 .var carObject = getCookieWrapper("mycar"); // Write/commit example
carObject.model="benz";
carObject.color="white";
carObject.year=2009;
carObject['license_'+userId]='2D6-0F8-DFR';
carObject.options.expires=7;//7 days for expiry
commitCookieWrapperChanges(carObject);
 
2. var emailObject = getCookieWrapper("email"); //read example
var username = emailObject.userName 

@ author Infosys
*/


/*
 The  parse routine below is responsible for conversion to the string to object conversion
  and vice versa 
  */
//IMPORTANT : Please do not edit the code between the tags 'Start of parse routine' and 'End of parse routine'

// Start of parse routine ////

if(!this.JSON){JSON={};}
(function(){function f(n){return n<10?'0'+n:n;}
if(typeof Date.prototype.toJSON!=='function'){Date.prototype.toJSON=function(key){return this.getUTCFullYear()+'-'+
f(this.getUTCMonth()+1)+'-'+
f(this.getUTCDate())+'T'+
f(this.getUTCHours())+':'+
f(this.getUTCMinutes())+':'+
f(this.getUTCSeconds())+'Z';};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(key){return this.valueOf();};}
var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={'\b':'\\b','\t':'\\t','\n':'\\n','\f':'\\f','\r':'\\r','"':'\\"','\\':'\\\\'},rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==='string'?c:'\\u'+('0000'+a.charCodeAt(0).toString(16)).slice(-4);})+'"':'"'+string+'"';}
function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==='object'&&typeof value.toJSON==='function'){value=value.toJSON(key);}
if(typeof rep==='function'){value=rep.call(holder,key,value);}
switch(typeof value){case'string':return quote(value);case'number':return isFinite(value)?String(value):'null';case'boolean':case'null':return String(value);case'object':if(!value){return'null';}
gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==='[object Array]'){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||'null';}
v=partial.length===0?'[]':gap?'[\n'+gap+
partial.join(',\n'+gap)+'\n'+
mind+']':'['+partial.join(',')+']';gap=mind;return v;}
if(rep&&typeof rep==='object'){length=rep.length;for(i=0;i<length;i+=1){k=rep[i];if(typeof k==='string'){v=str(k,value);if(v){partial.push(quote(k)+(gap?': ':':')+v);}}}}else{for(k in value){if(Object.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?': ':':')+v);}}}}
v=partial.length===0?'{}':gap?'{\n'+gap+partial.join(',\n'+gap)+'\n'+
mind+'}':'{'+partial.join(',')+'}';gap=mind;return v;}}
if(typeof JSON.stringify!=='function'){JSON.stringify=function(value,replacer,space){var i;gap='';indent='';if(typeof space==='number'){for(i=0;i<space;i+=1){indent+=' ';}}else if(typeof space==='string'){indent=space;}
rep=replacer;if(replacer&&typeof replacer!=='function'&&(typeof replacer!=='object'||typeof replacer.length!=='number')){throw new Error('JSON.stringify');}
return str('',{'':value});};}
if(typeof JSON.parse!=='function'){JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==='object'){for(k in value){if(Object.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v;}else{delete value[k];}}}}
return reviver.call(holder,key,value);}
cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return'\\u'+
('0000'+a.charCodeAt(0).toString(16)).slice(-4);});}
if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,'@').replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,']').replace(/(?:^|:|,)(?:\s*\[)+/g,''))){j=eval('('+text+')');return typeof reviver==='function'?walk({'':j},''):j;}
throw new SyntaxError('JSON.parse');};}}());

 // End of parse routine ////

function getCookieforJSON(name) {
   var start, end,
      cookie = document.cookie;

   if (cookie.length) {
      start = cookie.indexOf(name + "=");
      if (start!=-1) {
         start = start + name.length+1;
         end = cookie.indexOf(";",start);
         if (end==-1) {
            end = cookie.length;
    }
         return unescape(cookie.substring(start,end));
  }
   }
return "";
}

/*
This method returns a wrapper object for the cookie name specified.If no cookie is there ,
it will create an empty cookie.The properties can be get or set using the dot operator. 
The wrapper object includes a built in object 'options'
*/
function getCookieWrapper(name) {
   var value = getCookieforJSON(name),
      wrap = null;
   
   if (value == null || value == undefined || value=="" || value =="null" ){
        wrap = {};
   }
   else {
        try{
         wrap = JSON.parse(value);
    }
      catch(error){
         wrap = {};
    }
   }
 
   wrap.options = {
      expires: 0,
      path: null,
      domain: null,
      secure: false,
      name:name,
      empty: value === null || value == "" || value == "null"
   };
         
   return wrap;
    }
    
/*
Returns a  string notation of the wrapperObject.
*/
function getStringValueOfCookieWrapper(wrap){
   if (!wrap) {
        return "";
   }
   else {
        try {
         return JSON.stringify(wrap);
      }
      catch(error){
             return "";
    }
}
}

/*
This methods write the new/changed value of the cookie to the browser i.e. it commits the
value of the wrapper object.
*/
function commitCookieWrapperChanges(wrap) {
   var cookieOptions = null,
      cookieOptionsforUpdate=null,
      name, value = '';
    
   if(wrap.options.name == 'searchPreferences')
    wrap.options.path='/';
    
   if (wrap.options.expires!=0 || wrap.options.path!=null || wrap.options.domain != null || wrap.options.secure!=false) {
      cookieOptions=wrap.options;
    }
    
   cookieOptionsforUpdate=wrap.options;
   name = wrap.options.name;
   delete wrap.options;
        
   try{
      value = JSON.stringify(wrap);
    }
   catch(error){
      value = null;
        }
        
   if (!cookieOptions) {
      SetCookieforJSON(name,value);
    }
   else {
      SetCookieforJSON(name,value,cookieOptions.expires, cookieOptions.path,cookieOptions.domain,cookieOptions.secure);
}
   if (cookieOptionsforUpdate) {
      wrap.options = cookieOptionsforUpdate;
      wrap.options.empty = (value == null || value=="" || value=="null");
   }
}

/*
This method deletes the wrapper object  sets it to null and deletes 
 the  cookie associated with it.
 */
function deleteCookieWrapper(wrap) {
   if (wrap != null && wrap != undefined) {
      var cookieOptions=null,
         cookieName = wrap.options.name;
      
      if (wrap.options.expires || wrap.options.path || wrap.options.domain || wrap.options.secure) {
         cookieOptions=wrap.options;
        }
        if(cookieOptions == null){
            SetCookieforJSON(cookieName,null,0);
        }
      else {
         SetCookieforJSON(cookieName,null,0,cookieOptions.path,cookieOptions.domain,cookieOptions.secure);
      }
        try{
         delete wrap;
         }
      catch(error){}
       
      wrap = null;
    }
}

function SetCookieforJSON(name, value, expires, path, domain, secure) {
        // set time, it's in milliseconds
   var today = new Date(), expDate;
        today.setTime( today.getTime() );
        
        /*
		if the expires variable is set, make the correct
		expires time, the current script below will set
		it for x number of days, to make it for hours,
		delete * 24, for minutes, delete * 60 * 24
         */
   if (expires) {
            expires = expires * 1000 * 60 * 60 * 24;
        }
   expDate = new Date(today.getTime() + expires);
        document.cookie = name + "=" +escape( value ) +
      (expires ? ";expires=" + expDate.toGMTString() : "") +
      (path ? ";path=" + path : "") +
      (domain ? ";domain=" + domain : "") +
      (secure ? ";secure" : "");
    }