/**
 * auto_save.js
 *
 * Collection of Scripts to allow in page communication from browser to (struts) server
 * ie can reload part instead of full page
 *
 * How to use
 * ==========
 * 1) Call retrieveURL from the relevant event on the HTML page (e.g. onclick)
 * 2) Pass the url to contact (e.g. Struts Action) and the name of the HTML form to post
 * 3) When the server responds ...
 *		 - the script loops through the response , looking for <span id="name">newContent</span>
 * 		 - each <span> tag in the *existing* document will be replaced with newContent
 *
 * NOTE: <span id="name"> is case sensitive. Name *must* follow the first quote mark and end in a quote
 *		 Everything after the first '>' mark until </span> is considered content.
 *		 Empty Sections should be in the format <span id="name"></span>
 */

//global variables
  var req;
  var which;


  /**
   * Get the contents of the URL via an Ajax call
   * url - to get content from (e.g. /struts-ajax/sampleajax.do?ask=COMMAND_NAME_1) 
   * nodeToOverWrite - when callback is made
   * nameOfFormToPost - which form values will be posted up to the server as part 
   *					of the request (can be null)
   */
  function retrieveURL(url,nameOfFormToPost) {
    //get the (form based) params to push up as part of the get request
    url=url+getFormAsString(nameOfFormToPost);
    //alert("inside js>>>" +url);
    //Do the Ajax call
    if (window.XMLHttpRequest) { // Non-IE browsers
      req = new XMLHttpRequest();
      req.onreadystatechange = processStateChange;
      //alert("req>>>>"+req.onreadystatechange);
      try {
      	req.open("GET", url, true); //was get
      } catch (e) {
        //alert("Problem Communicating with Server\n"+e);
      }
      req.send(null);
    } else if (window.ActiveXObject) { // IE
      
      req = new ActiveXObject("Microsoft.XMLHTTP");
      if (req) {
        req.onreadystatechange = processStateChange;
        req.open("GET", url, true);
        req.send();
      }
    }
  }

/*
   * Set as the callback method for when XmlHttpRequest State Changes 
   * used by retrieveUrl
  */
  function processStateChange() {
  
  	  if (req.readyState == 4) { // Complete
      if (req.status == 200) { // OK response
        
        //alert("Ajax response:"+req.responseText);
        //Split the text response into Span elements
        //spanElements = splitTextIntoSpan(req.responseText);
		checkToHideDialog(req.responseText);
        //Use these span elements to update the page
        //replaceExistingWithNewHtml(spanElements);
        
      } else {
		  document.getElementById("errId").innerHTML = "Error while retrieving data. Please Refresh the page.";
      }
    }
  }
 
 /**
  * gets the contents of the form as a URL encoded String
  * suitable for appending to a url
  * @param formName to encode
  * @return string with encoded form values , beings with &
  */ 
 function getFormAsString(formName){
 	//alert("form name>>>>>"+formName);
 	//Setup the return String
 	returnString ="";
 	
  	//Get the form values
 	formElements=document.forms[formName].elements;
 	//alert("form element>>>>"+formElements);
 	//loop through the array , building up the url
 	//in the form /strutsaction.do&name=value
 	
 	for ( var i=formElements.length-1; i>=0; --i ){
 		//we escape (encode) each value
 		returnString=returnString+"&"+escape(formElements[i].name)+"="+escape(formElements[i].value);
 	}
 	
 	//return the values
 	return returnString; 
 }
 
 /**
 * Splits the text into <span> elements
 * @param the text to be parsed
 * @return array of <span> elements - this array can contain nulls
 */
 function splitTextIntoSpan(textToSplit){
 
  	//Split the document
 	returnElements=textToSplit.split("</span>")
 	
 	//Process each of the elements 	
 	for ( var i=returnElements.length-1; i>=0; --i ){
 		
 		//Remove everything before the 1st span
 		spanPos = returnElements[i].indexOf("<span");		
 		
 		//if we find a match , take out everything before the span
 		if(spanPos>0){
 			subString=returnElements[i].substring(spanPos);
 			returnElements[i]=subString;
 		
 		} 
 	}
 	
 	return returnElements;
 }
 
 /*
  * Replace html elements in the existing (ie viewable document)
  * with new elements (from the ajax requested document)
  * WHERE they have the same name AND are <span> elements
  * @param newTextElements (output of splitTextIntoSpan)
  *					in the format <span id=name>texttoupdate
  */
 function checkToHideDialog(newTextElements){
	 // to identify whether error exixts or not in the response text
	if(newTextElements.indexOf("<span id=\"errId\"") < 0 ){
	 //jQuery(document).trigger('close.facebox');
	  document.getElementById("msg").innerHTML = getDisplayMessage(newTextElements);
	 jQuery(document).ready(function() {
		/*$('#facebox').fadeOut(4000); 
		window.setTimeout("reFresh()",2000);*/});
	}else if(newTextElements.indexOf("<span id=\"error\"") < 0){
		 jQuery(document).ready(function() {
		$('#facebox').fadeOut(4000); 
		window.setTimeout("reFresh()",2000);});
	}
	else{
      document.getElementById("msg").innerHTML = newTextElements;
	}
  }
  
  function searchCheckToHideDialog(newTextElements){
	 // to identify whether error exixts or not in the response text
	if(newTextElements.indexOf("<span id=\"errId\"") < 0 ){
	 //jQuery(document).trigger('close.facebox');
	  document.getElementById("msg").innerHTML = getDisplayMessage(newTextElements);
	 jQuery(document).ready(function() {
		/*$('#facebox').fadeOut(4000); 
		window.setTimeout(jQuery(document).trigger('close.facebox'),1000);*/});
	}else if(newTextElements.indexOf("<span id=\"error\"") < 0){
		 jQuery(document).ready(function() {
		$('#facebox').fadeOut(4000); 
		window.setTimeout(jQuery(document).trigger('close.facebox'),1000);});
	}
	else{
      document.getElementById("msg").innerHTML = newTextElements;
	}
  }
function reFresh() {
  location.reload(true);
 // window.clearInterval();
}
 function getDisplayMessage(newTextElements){
	var message = "";
	ele = splitTextIntoSpan(newTextElements);
	if(ele.length > 0)
		message = ele[0];
	return message;
 }

 function replaceExistingWithNewHtml(newTextElements){
 
 	//loop through newTextElements
 	for ( var i=newTextElements.length-1; i>=0; --i ){
  
 		//check that this begins with <span
 		if(newTextElements[i].indexOf("<span")>-1){
 			
 			//get the name - between the 1st and 2nd quote mark
 			startNamePos=newTextElements[i].indexOf('"')+1;
 			endNamePos=newTextElements[i].indexOf('"',startNamePos);
 			name=newTextElements[i].substring(startNamePos,endNamePos);
 			
 			//get the content - everything after the first > mark
 			startContentPos=newTextElements[i].indexOf('>')+1;
 			content=newTextElements[i].substring(startContentPos);
 			
 			//Now update the existing Document with this element
 			
	 			//check that this element exists in the document
	 			if(document.getElementById(name)){
	 			
	 				//alert("Replacing Element:"+name);
	 				document.getElementById(name).innerHTML = content;
	 			} else {
	 				//alert("Element:"+name+"not found in existing document");
	 			}
 		}
 	}
 }

function commentLogin(formObj,url){
	form= formObj;
      if((form.commentbox.value).length>0 && !isBlank(form.commentbox.value)){
        jQuery(document).ready(function($) {
        jQuery.facebox(function() { 
        var req = new XMLHttpRequest();
        if (req) {
            req.onreadystatechange = function() {
                if (req.readyState == 4 && req.status == 200) {
                  jQuery.facebox(req.responseText)
               }
            };
            req.open('POST', '/popupLogin.do');
            req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
            req.send("url="+getFormString('postform',url));
        }
        }) 
        })
      }else{
        alert("Empty values not allowed");
        form.commentbox.focus();
      }
      form.commentbox.value='';
	}

 function getFormString(formName,url){
 	//alert("form name>>>>>"+formName);
 	//Setup the return String
 	returnString ="";
 	
  	//Get the form values
 	formElements=document.forms[formName].elements;
 	//alert("form element>>>>"+formElements);
 	//loop through the array , building up the url
 	//in the form /strutsaction.do&name=value
 	returnString = url;
 	for ( var i=formElements.length-1; i>=0; --i ){
 		//we escape (encode) each value
 		returnString=returnString+"_amp_"+escape(formElements[i].name)+"="+escape(formElements[i].value);
 	}

 	//return the values
 	return returnString; 
 }

 function manageFriend(url){
 	 var req;
 	 var browser;
      browser = navigator.appName;
   if(browser == "Microsoft Internet Explorer"){
     // For Windows Browsers
     req = new ActiveXObject("Microsoft.XMLHttp");
   }else{
     // For Otherthan Windows Browsers
     req = new XMLHttpRequest();
   } 
     jQuery(document).ready(function($) {
     jQuery.facebox(function() {
     if (req) {
         req.onreadystatechange = function() {
             if (req.readyState == 4 && req.status == 200) {
               jQuery.facebox(req.responseText);
               checkToHideDialog(req.responseText);
            }
         };
         req.open('POST', '/popupLogin.do');
         req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
         req.send("url="+url);
     }
     }) 
     $(document.getElementById("faceboxClose")).click(function () { 
      reFresh();
    });

     })
 }
 
 function searchManageFriend(url){
 	 var browser;
 	 browser = navigator.appName;
        if(browser == "Microsoft Internet Explorer"){
	      req = new ActiveXObject("Microsoft.XMLHttp");
	    }else{
	      req = new XMLHttpRequest();
	    } 
     jQuery(document).ready(function($) {
     jQuery.facebox(function() { 
     if (req) {
         req.onreadystatechange = function() {
             if (req.readyState == 4 && req.status == 200) {
               jQuery.facebox(req.responseText);
               searchCheckToHideDialog(req.responseText);
            }
         };
         req.open('POST', '/popupLogin.do');
         req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
         req.send("url="+url);
     }
     }) 
     })
 }
  function loginPopup(){
     jQuery(document).ready(function($) {
     jQuery.facebox(function() { 
     var req = new XMLHttpRequest();
     if (req) {
         req.onreadystatechange = function() {
             if (req.readyState == 4 && req.status == 200) {
               jQuery.facebox(req.responseText);
               checkToHideDialog(req.responseText);
            }
         };
         req.open('POST', '/popupLogin.do');
         req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
         req.send(null);
     }
     }) 
     })
 }