//
//-------------------------------------------------------------------
// Licensed Materials - Property of IBM
//
// WebSphere Commerce
//
// (c) Copyright IBM Corp. 2006
//
// US Government Users Restricted Rights - Use, duplication or
// disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
//-------------------------------------------------------------------
//

// This checks for a valid browser for the starter store.
// It displays a warning message if the browser is unconformant.

var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari";
else if (checkIt('omniweb')) browser = "OmniWeb";
else if (checkIt('opera')) browser = "Opera";
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab";
else if (checkIt('msie')) browser = "Internet Explorer";
else if (!checkIt('compatible'))
{
	//This block applyies only to NetScape browsers
	browser = "Netscape Navigator";
	var version_no = "";
	var vendor_name = "";
	//Mozill browser doesn't support navigator.vendor as it doesn't contain Vendor name in UserAgent string
	//For mozill we will use CVS Branch tag to determine its version, 
	//(SAME CAN BE USED FOR ALL NEW GECKO BROWSERS LIKE NETSCAPE, FIREFOX, MOZILLA, SEAMONKEY !!!)
	if(!navigator.vendor.toLowerCase())
	{
		//Its Mozilla
		vendor_name = "mozilla";
		version = getGeckoVersion();	//For mozilla CVS Branch tag and its Version is same.
	}
	else
	{
		//Its Netscape or firefox
		vendor_name = navigator.vendor.toLowerCase();
		var version_index = checkIt(vendor_name) + vendor_name.length ;
		version_no = detect.substr(version_index);
		
		//there are cases where more information is added after the version number
		var version_no_parts = version_no.split(' ');
		version = getVersionNo(version_no_parts[0]);
	}
	
	//version = detect.charAt(8);		//Old code.
	
}
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac";
	else if (checkIt('win')) OS = "Windows";
	else OS = "an unknown operating system";
}


//This function returns the position of partidular string exist in the UserAgent String.
function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


//This function converts version no in to xxx.xxx.xxx format.
//So that its string comparision becomes easy
//e.g. : 1.23.4		-> 001.023.004
//	 1.3.50		-> 001.003.050
function getVersionNo(string)
{
	var version_parts = string.split('.');
	var tmp_version_no = "";
	for (var i = 0; i < version_parts.length; i++)
	{
		var part = version_parts[i];
		var part_value = parseInt(part);
		//Here I assume that the version will limit under 999.
		//We can easily add support for four digits (xxxx.xxxx.xxxx format).
		var temp_value = 0;
		if(part_value == 0)
			temp_value = "000";			//for four digits support replace 000 with 0000
		else if(part.length < 2)
			temp_value = "00" + part_value;		//for four digits support replace 00 with 000
		else if(part.length < 3)
			temp_value = "0" + part_value;		//for four digits support replace 0 with 00
		//else if(part.length < 4)			//remove comments from below code for four digits support.
		//	part_value = "0" + part_value;		//xxxx.xxxx.xxxx format.
			
		tmp_version_no = tmp_version_no + temp_value + ".";
	}
	return tmp_version_no.substr(0, tmp_version_no.length - 1);//remove the end '.'
}



//This function returns the gecko version of mozilla browsers.
//Gecko browsers which are built from the same branch share the same basic version of Netscape Gecko and 
//can be treated similarly when dealing with HTML, CSS, JavaScript, etc.
//Netscape Firefox Mozilla and other mozilla base browser now supports gecko.

//So, This method can also be used for those browsers.
//But Gecko version is different than origional version except Mozilla.
function getGeckoVersion()
{
	if (navigator.product != 'Gecko')
	{
		return "000.000.000";
	}
	var start_index = detect.indexOf('rv:');
	var end_index   = detect.indexOf(')', start_index);
	var gecko_version_string = detect.substring(start_index + 3, end_index);
	return getVersionNo(gecko_version_string);
}


//This method check for browser support.
//Currently it is only checking for Netscape browers versions.
//But check for other browser can be easily added.
function isBrowserSupported()
{
	if(browser =="Netscape Navigator")
	{
		if(vendor_name == "netscape" && version < "007.000.000")	//Netscape Version 7.0.0
			return false;
		else if(vendor_name == "firefox" && version < "001.000.004")	//Firefox Version 1.0.4
			return false;
		else if(vendor_name == "mozilla" && version < "001.007.007")	//Mozilla Version 1.7.7
			return false;
		//else if(vendor_name == "Some_mozilla" && version < "xxx.yyy.zzz")	//Remove this comment to add support for
		//	return false;							//some other mozilla broser.
	}
	//else if(browser == "Some Browser")
	//{
	//	..	
	//	Code for Checking support for browser 
	//	..	
	//}
	return true;
}

//Added by Angela 1040694
var BrowserDetect = {
	 init: function () {
	  this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
	  this.version = this.searchVersion(navigator.userAgent)
	   || this.searchVersion(navigator.appVersion)
	   || "an unknown version";
	  this.OS = this.searchString(this.dataOS) || "an unknown OS";
	 },
	 searchString: function (data) {
	  for (var i=0;i<data.length;i++) {
	   var dataString = data[i].string;
	   var dataProp = data[i].prop;
	   this.versionSearchString = data[i].versionSearch || data[i].identity;
	   if (dataString) {
	    if (dataString.indexOf(data[i].subString) != -1)
	     return data[i].identity;
	   }
	   else if (dataProp)
	    return data[i].identity;
	  }
	 },
	 searchVersion: function (dataString) {
	  var index = dataString.indexOf(this.versionSearchString);
	  if (index == -1) return;
	  return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	 },
	 dataBrowser: [
	  {
	   string: navigator.userAgent,
	   subString: "Chrome",
	   identity: "Chrome"
	  },
	  {  string: navigator.userAgent,
	   subString: "OmniWeb",
	   versionSearch: "OmniWeb/",
	   identity: "OmniWeb"
	  },
	  {
	   string: navigator.vendor,
	   subString: "Apple",
	   identity: "Safari",
	   versionSearch: "Version"
	  },
	  {
	   prop: window.opera,
	   identity: "Opera"
	  },
	  {
	   string: navigator.vendor,
	   subString: "iCab",
	   identity: "iCab"
	  },
	  {
	   string: navigator.vendor,
	   subString: "KDE",
	   identity: "Konqueror"
	  },
	  {
	   string: navigator.userAgent,
	   subString: "Firefox",
	   identity: "Firefox"
	  },
	  {
	   string: navigator.vendor,
	   subString: "Camino",
	   identity: "Camino"
	  },
	  {  // for newer Netscapes (6+)
	   string: navigator.userAgent,
	   subString: "Netscape",
	   identity: "Netscape"
	  },
	  {
	   string: navigator.userAgent,
	   subString: "MSIE",
	   identity: "Explorer",
	   versionSearch: "MSIE"
	  },
	  {
	   string: navigator.userAgent,
	   subString: "Gecko",
	   identity: "Mozilla",
	   versionSearch: "rv"
	  },
	  {   // for older Netscapes (4-)
	   string: navigator.userAgent,
	   subString: "Mozilla",
	   identity: "Netscape",
	   versionSearch: "Mozilla"
	  }
	 ],
	 dataOS : [
	  {
	   string: navigator.platform,
	   subString: "Win",
	   identity: "Windows"
	  },
	  {
	   string: navigator.platform,
	   subString: "Mac",
	   identity: "Mac"
	  },
	  {
	      string: navigator.userAgent,
	      subString: "iPhone",
	      identity: "iPhone/iPod"
	     },
	  {
	   string: navigator.platform,
	   subString: "Linux",
	   identity: "Linux"
	  }
	 ]
	 
	};
	BrowserDetect.init();
	if (
	BrowserDetect.browser=="Explorer"&&BrowserDetect.version<=5.5||
	BrowserDetect.browser=="Netscape"&&BrowserDetect.version<=4.8||
	BrowserDetect.browser=="Firefox"&&BrowserDetect.version<=0.1||
	BrowserDetect.browser=="Mozilla"&&BrowserDetect.version<=0.6
	
	){
	   alert("Your browser needs to be upgraded, please upgrade to a newer version of "+BrowserDetect.browser+"!");
	}//else alert("You are using - "+BrowserDetect.browser+"- version:"+BrowserDetect.version+"!");