/*
 * Basic AJAX and XML parsing
 */

function getDataFromTag(xmlDoc, tag)
{
	try 
	{
		if (xmlDoc.getElementsByTagName(tag)[0] )
		{
			return xmlDoc.getElementsByTagName(tag)[0].firstChild.nodeValue;
		}
		return "";
	}
	catch (err)
	{
		return "";
	}
}

function getDataFromTagWithDefault(xmlDoc, tag)
{
	try 
	{
		if (xmlDoc.getElementsByTagName(tag)[0] )
		{
			return xmlDoc.getElementsByTagName(tag)[0].firstChild.nodeValue;
		}
		return "";
	}
	catch (err)
	{
		return "-";
	}
}

//2015.08.31 add
function getDataFromTagWithNth(xmlDoc, tag, index){
	try 
	{
  		if (xmlDoc.getElementsByTagName(tag)[index] )
  		{
			return xmlDoc.getElementsByTagName(tag)[index];
  		}
		return "";
	}
	catch (err)
	{
		return "";
 	}
}

function hasError(xmlDoc)
{
	if(xmlDoc)
	{
		var errors = xmlDoc.getElementsByTagName("Error");
		
		if (errors.length)
		{
			return 1;
		}
	
		return 0;
	}
	return 0;
}

function showError(xmlDoc)
{
	var errors = xmlDoc.getElementsByTagName("Error");
	for (var i=0; i<errors.length; i++)
	{
		alert("Error: " + errors.item(i).firstChild.nodeValue);
	}
}

function XHRGet(handle, url, async, unique, /*opt*/timeout_secs, /*opt*/timeout_handler) 
{
	var request = null;
	var urlUnique = url;

	var timeoutTimer=null;
	if (window.XMLHttpRequest) 
	{
		request = new XMLHttpRequest();
	}
	else if (window.ActiveXObject) 
	{
		request = new ActiveXObject("Microsoft.XMLHTTP");
	}

	if (request == null)
	{
		alert("Your browser does not support XMLHttp");
		return -1;
	}

	if ((typeof timeout_secs != 'undefined') &&
	    (typeof timeout_handler != 'undefined')) {
		// It's better than ontimeout because of some uncatchable exception(ERR_INSECURE_RESPONSE).
		// And handle CORS error on IE8 & IE9.
		if(timeout_handler != null){
   			timeoutTimer = setTimeout(function() { request.abort(); timeout_handler(); }, timeout_secs * 1000);
		}else{
   			timeoutTimer = setTimeout(function() { request.abort(); }, timeout_secs * 1000);
   		}
		//timeoutTimer = setTimeout(function() { request.abort(); timeout_handler(); }, timeout_secs * 1000);
	}
	if (handle != null)
	{
		if(url.search("DebugLogGet") > 0)
			request.onreadystatechange = function () { XHRGetTEXTHandle(request, handle); };
		else	
			request.onreadystatechange = function () { XHRGetHandle(request, handle,timeoutTimer); };
	}	
	try {
		if (unique == undefined || unique == true)
		{
			request.open("GET", urlUnique, async);
		}
		else
		{
			request.open("GET", url, async);
		}
	} catch(err) {
		return -1;
	}
	request.send(null);
	return 0;
}

function XHRGetHandle(request, handle,timeoutTimer)
{
	if(request.readyState == 4 && request.status == 200) 
	{
		if (typeof timeoutTimer != 'undefined') {
			clearTimeout(timeoutTimer);
		}
		if (typeof timeoutTimer != null) {
			clearTimeout(timeoutTimer);
		}

		var sess_stok = getDataFromTag(request.responseXML, "sess_stok");
		if (sess_stok != "")
		{
			RefreshCsrfStok(request.responseXML);
		}

		handle(request.responseXML);
	}
}
function XHRGetTEXTHandle(request, handle) // for debug log
{
	if(request.readyState == 4 && request.status == 200) 
	{
		if (typeof timeoutTimer != 'undefined') {
			clearTimeout(timeoutTimer);
		}
		
		var sess_stok = getDataFromTag(request.responseXML, "sess_stok");
		if (sess_stok != "")
		{
			RefreshCsrfStok(request.responseXML);
		}
		
		handle(request.responseText);
	}
}
function XHRPost(handle, url, param, async, /*opt*/timeout_secs, /*opt*/timeout_handler,/*opt*/ignoreErr) 
{
	var request = null;
	var param = param;

	var timeoutTimer;
	if (window.XMLHttpRequest) 
	{
		request = new XMLHttpRequest();
	}
	else if (window.ActiveXObject) 
	{
		request = new ActiveXObject("Microsoft.XMLHTTP");
	}

	if (request == null)
	{
		alert("Your browser does not support XMLHttp");
		return -1;
	}
	
	request.open("POST", url, async);
	request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	/* When stok exists, send it for preventing csrf. */
	var stoks = $('meta[name=stok]');
	if( stoks.length >= 1 ) {
		request.setRequestHeader("X-Stok", stoks[0].content);
	}
	if ((typeof timeout_secs != 'undefined') &&
	    (typeof timeout_handler != 'undefined')) {
		// It's better than ontimeout because of some uncatchable exception(ERR_INSECURE_RESPONSE).
		// And handle CORS error on IE8 & IE9.
		timeoutTimer = setTimeout(function() { request.abort(); timeout_handler(); }, timeout_secs * 1000);
	}
	if (handle != null)
	{
		request.onreadystatechange = function () { XHRPostHandle(request, handle,0,timeoutTimer,ignoreErr); };
	}

	request.send(param);
	return 0;
}

function XHRPost_reboot(handle, url, param, async, /*opt*/timeout_secs, /*opt*/timeout_handler) 
{
	var request = null;
	var param = param;
	var reboot_flag = 1;

	var timeoutTimer;
	if (window.XMLHttpRequest) 
	{
		request = new XMLHttpRequest();
	}
	else if (window.ActiveXObject) 
	{
		request = new ActiveXObject("Microsoft.XMLHTTP");
	}

	if (request == null)
	{
		alert("Your browser does not support XMLHttp");
		return -1;
	}
	
	request.open("POST", url, async);
	request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	/* When stok exists, send it for preventing csrf. */
	var stoks = $('meta[name=stok]');
	if( stoks.length >= 1 ) {
		request.setRequestHeader("X-Stok", stoks[0].content);
	}
	if (handle != null)
	{
		request.onreadystatechange = function () { XHRPostHandle(request, handle,reboot_flag); };
	}
	if ((typeof timeout_secs != 'undefined') &&
	    (typeof timeout_handler != 'undefined')) {
		// It's better than ontimeout because of some uncatchable exception(ERR_INSECURE_RESPONSE).
		// And handle CORS error on IE8 & IE9.
		timeoutTimer = setTimeout(function() { request.abort(); timeout_handler(); }, timeout_secs * 1000);
	}
	request.send(param);
	return 0;
}

function CsrfErrLogout(xmlDoc)
{
    window.location.href = 'Login.html';			
}

function RefreshCsrfStok(xmlDoc)
{
	var stokValue = getDataFromTag(xmlDoc, "sess_stok");
	if(stokValue != "")
	{	
		var stoks = $('meta[name=stok]');
		if( stoks != 'undefined' && stoks.length >= 1 )
		{
			stoks[0].content = stokValue;
		}
	}
}

function XHRPostHandle(request, handle,reboot_flag,timeoutTimer,/*opt*/ignoreErr)
{
	var ResponseXml = null;
	if(request.readyState == 4 && request.status == 200) 
	{
		if (typeof timeoutTimer != 'undefined') {
			clearTimeout(timeoutTimer);
		}
		if (typeof timeoutTimer != null) {
			clearTimeout(timeoutTimer);
		}

		var sess_stok = getDataFromTag(request.responseXML, "sess_stok");
		if (sess_stok != "")
		{
			RefreshCsrfStok(request.responseXML);
		}
		else
		{
			var error = getDataFromTag(request.responseXML,"Error");
			var error_msg = getDataFromTag(request.responseXML,"ErrorMsg");
			if (error != "" || error_msg != "")
			{
				XHRGet(RefreshCsrfStok, "./cgi-bin/maintenance.cgi?Command=getSessinStok", true);
			}
		}
		if (navigator.userAgent.indexOf("Firefox") != -1)
		{
			var error = getDataFromTag(request.responseXML,"parsererror");
			if (error != "")
			{
				ResponseXml = null;
			}else
			{
				ResponseXml = request.responseXML;
			}
		}
		else{
			ResponseXml = request.responseXML;
		}
		handle(ResponseXml);
	}
	else if(request.readyState == 4 && request.status == 400) 
	{
		if(reboot_flag == "1" || reboot_flag == 1)
			ErrorBlock("Bad Request.","gotosystemdefauit(true)");
		else 
			ErrorBlock("Bad Request.","window.location.reload(true)");		
	}
	else if(request.readyState == 4 && request.status == 404&&(typeof ignoreErr == 'undefined'||ignoreErr == false)) 
	{
	    		ErrorBlock("404 Not Found.","window.location.reload(true)");
	}
}

function gotosystemdefauit(){
	var url="reboot.html";
	 if(WhatBrowser.match("IE")!=null)
	   {
		 var referLink = document.createElement('a');
         referLink.href = url;
         document.body.appendChild(referLink);
         referLink.click();
	 }
	 else
         window.location.href = url;
}
function serializeFormElement(form)
{
	var str = "";
	var elem = document.getElementById(form).elements;
	for(var i = 0; i < elem.length; i++)
	{
		if (elem[i].id && elem[i].value)
		{
			if (i!=0)
			{
				str+="&";
			}
			str +=elem[i].id + "=" + elem[i].value;
		}
	} 
	return str;
}