/*
 * Name:
 *	captchaLibrary.js
 *
 * Description:
 *  Random generated a string of 5 char
 *
 * Pre-conditions:
 *
 * Post-conditions:
 *	A random 5 char string is generted and display the flash image
 *
 * Log:
 *  Ramu         06/22/2007
 *  - Creation
 *  Kripa Shenai 07/19/2007
 *	- Made it into a common file - Adapted from Forum
 */
//Global variable for ajax request
var captchaXMLHttpRequestObj = false;
var captchaGlobalStnBoxId = "";
var onSuccessFunction = "";

//
// following request will be generated from the calling file.
//
function callCaptcha(stnBoxId,successFunction)
{
	
	//
	// get the object of the display div and text box.
	//
	objRandomImageAndTextDiv = document.getElementById("randomImageAndTextDiv_"+stnBoxId);
	objForumVerification = document.getElementById("varification_captcha_"+stnBoxId);
	
	// assign function to global function.
	onSuccessFunction = successFunction;
	captchaGlobalStnBoxId = stnBoxId;
	// If RandomImage And Text div's style is none change it to block and don't display Title And CommentDiv
	
	if(objRandomImageAndTextDiv.style.display == "none"){
		
		//
		// generate query string and send to generate captcha code.
		//
		url="/custom_code/generateAndCheckCaptchaOnServer.php";
		
		// create query string
		queryStr= "?stnBoxId="+escape(stnBoxId)+"&generateCode=1";
		
		// define the operation.
		operation = "generateCode";
		
		//
		// call for calling server side script.
		//
		requestForCaptcha(url,queryStr,operation);
		
		return false;
	}// end if, objRandomImageAndTextDiv display property checking
	// start else to check the varification code.
	else if(trim(objForumVerification.value) != '')
	{
		//
		// generate query string and send to generate captcha code.
		//
		url="/custom_code/generateAndCheckCaptchaOnServer.php";
		
		// create query string
		queryStr= "?stnBoxId="+escape(stnBoxId)+"&validateCode=1&validator="+objForumVerification.value;
		
		//
		// change the operation name to varification.
		//
		operation = 'varification'
		
		//
		// call for calling server side script.
		//
		requestForCaptcha(url,queryStr,operation);
		return false;
	}// end else to check the varification code.
	else
	{
		alert("Please enter the code shown to complete the submit process");
		return false;
	}
}// end function callCaptcha

/*
 * Name:
 *	requestForCaptcha
 *
 * Description:
 *  call php file for generating and validation captcha request.
 *  define the handler for the captcha also.
 		- if the operation is "generateCode" 		: handler just return string and will display captcha block
 		- else if the operation is "varification"	: handler 
 													-(on wrong varification) return false to user and display error message on error div + give new captcha string.
 													-(on success varification) - just return true and call the front-end application user javascript :
 													  any script from the ( form, poll, image-gallary, poll...etc.)
 * Pre-conditions:
 *	url			- PHP file path
 *	queryStr	- Query String
 *
 * Post-conditions:
 *	will call serverside script and call the handler.
 *
 * Functions:
 *	
 *
 * Log:
 *  
 *	Dipak A.Basantani		09/11/2008
 		if the request is for generate code or varification code then change the handler of the object event "onreadystatechange"
 
 *  - Creation
 *
 */
function requestForCaptcha(url,queryStr,operation){
	
	// Mozilla, Safari, Opera...
	if (window.XMLHttpRequest) {
	    captchaXMLHttpRequestObj = new XMLHttpRequest();
	    // Request type is xml
	    if (captchaXMLHttpRequestObj.overrideMimeType) {
	        captchaXMLHttpRequestObj.overrideMimeType('text/xml');
	    }// end if, request overrideMimeType checking
	// IE
	} else if (window.ActiveXObject) {
		// Above IE5.x
	    try {
	        captchaXMLHttpRequestObj = new ActiveXObject("Msxml2.XMLHTTP");
	    } catch (e) {
	    	// Under IE5.x
	        try {
	            captchaXMLHttpRequestObj = new ActiveXObject("Microsoft.XMLHTTP");
	        } catch (e) {}
	    }// end if, IE
	}// end if, browser checking

	
	// If req is null then alert
	if (!captchaXMLHttpRequestObj) {
	    alert('Giving up :( Cannot create an XMLHTTP instance');
	    return false;
	}// end if, req checking

	
	// Set a callback to be invoked when the ReadyState changes on the XMLHTTP object.
	if(operation == 'generateCode' || operation == 'varification')
	{
		captchaXMLHttpRequestObj.onreadystatechange = updateCaptchaDivWithRandomString;
		url = url +queryStr+"&sid="+Math.random();
		captchaXMLHttpRequestObj.open("GET",url,true);
		captchaXMLHttpRequestObj.send(null);
	}
}// END function - loadXML

/*
 * Name:
 *	updateCaptchaDivWithRandomString
 *
 * Description:
 *  get the key from the server and display into flash.
 *
 * Pre-conditions:
 *
 * Post-conditions:
 *	A random 5 char string is generted and display the flash image
 *
 * Log:
 *  Dipak A Basantani        10/09/2008
 *  - Creation
 */
function updateCaptchaDivWithRandomString()
{
	// only if req shows "complete"
    if (captchaXMLHttpRequestObj.readyState == 4){
    	
    	// only if "OK"
        if (captchaXMLHttpRequestObj.status == 200){
        	
        	response  = captchaXMLHttpRequestObj.responseText;
        	eval(response);
        	if(outputString.operation != 'validateCode')
        	{
        		
				// to get div object which is supported by all browsers
				objRandomImageAndTextDiv = document.getElementById("randomImageAndTextDiv_"+captchaGlobalStnBoxId);
				
				//
				// display the div for entering captcha code.
				//
				objRandomImageAndTextDiv.style.display = "block";
				if(outputString.error == 'true')
        		{
        			document.getElementById('errorDiv_'+captchaGlobalStnBoxId).display = "";
        			document.getElementById('errorDiv_'+captchaGlobalStnBoxId).innerHTML = '<font color="red"><b>Code entered is wrong.Enter Correct Code.</b></font>';
        		}
        		
        		//
				// update the div with the flash of the captcha string.
				//
				displayCaptchaRandomString(outputString.randomStr);
        	}
        	else
        	{
        		//
        		// after validation of code it comes to here and will go to insert and display the new forum comments in the forum
        		//
        		document.getElementById('errorDiv_'+captchaGlobalStnBoxId).innerHTML = "";
        		
        		//
        		// call the user stnBox library function on success validation. and 
        		//
        		eval(onSuccessFunction+"()");
        		return false;
        	}
        }// else alert 
        else{
        	alert("There was a problem retrieving the XML data:\n" + captchaXMLHttpRequestObj.statusText);
        }// end if, status checking
    }// end if, readstate checking
}// end function updateRandomString


/*
 * Name:
 *	displayCaptchaRandomString
 *
 * Description:
 *  display captcha string into div object.
 *
 * Pre-conditions:
 *
 * Post-conditions:
 *	
 *
 * Log:
 *  Dipak A. Basantani        09/10/2008
 *  - Creation
 */
function displayCaptchaRandomString(str)
{
	url = "http://static.intertechmedia.com/itm/captcha-8.swf?v1="+str.charAt(0)+"&v2="+str.charAt(1)+"&v3="+str.charAt(2)+"&v4="+str.charAt(3)+"&v5="+str.charAt(4);
	tmpStr = '';
	tmpStr += "To complete your post, please enter the code below(<A href='http://static.intertechmedia.com/inf/whatsthat.html' onClick=\"return popup(this, 'Security_Note')\">What?</A>).<br />";
	tmpStr += '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0, 0,0" width="188" height="40" id="CAPTCHA-8" align="middle">\
	<param name="allowScriptAccess" value="sameDomain" />\
	<param name="movie" value="'+url+'" /><param name="quality" value="high" /><param name="bgcolor" value="#ffffff" />\
	<embed src="'+url+'" quality="high" bgcolor="#ffffff" width="188" height="40" name="CAPTCHA-8" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />\
	</object>';
	tmpStr += '<br />Enter the code above:<br />';
	
	// Get the object of popup Flash Movie Div which is supported by all browsers
	randomImageDivObj = document.getElementById("randomImageDiv_"+captchaGlobalStnBoxId);
	// If flash div object then embed object inside div
	if(randomImageDivObj){
		randomImageDivObj.innerHTML = "";
		randomImageDivObj.innerHTML= tmpStr;
	}// end if, flash movie object
	
}// end function displayRandomString