/************************************************************************************************************
Ajax poller
Copyright (C) 2006  DTHMLGoodies.com, Alf Magne Kalleland

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

Dhtmlgoodies.com., hereby disclaims all copyright interest in this script
written by Alf Magne Kalleland.

Alf Magne Kalleland, 2006
Owner of DHTMLgoodies.com


var serverSideFile = 'poller-cast-vote';
var voteLeftImage = 'images/graph_left_1.gif';
var voteRightImage = 'images/graph_right_1.gif';
var voteCenterImage = 'images/graph_middle_1.gif';

var graphMaxWidth = 130;	// It will actually be a little wider than this because of the rounded image at the left and right
var graphMinWidth = 15;	// Minimum size of graph
var pollScrollSpeed = 5;	// Lower = faster
var useCookiesToRememberCastedVotes = false;	// Use cookie to remember casted votes
var txt_totalVotes = 'Total number of votes: ';

************************************************************************************************************/


var ajaxObjects = new Array();

var pollVotes = new Array();

var pollVoteCounted = new Array();

var totalVotes = new Array();





/* Preload images */



var preloadedImages = new Array();

preloadedImages[0] = new Image();

preloadedImages[0].src = voteLeftImage;

preloadedImages[1] = new Image();

preloadedImages[1].src = voteRightImage;

preloadedImages[2] = new Image();

preloadedImages[2].src = voteCenterImage;



/*

These cookie functions are downloaded from

http://www.mach5.com/support/analyzer/manual/html/General/CookiesJavaScript.htm

*/

function Poller_Get_Cookie(name) {

   var start = document.cookie.indexOf(name+"=");

   var len = start+name.length+1;

   if ((!start) && (name != document.cookie.substring(0,name.length))) return null;

   if (start == -1) return null;

   var end = document.cookie.indexOf(";",len);

   if (end == -1) end = document.cookie.length;

   return unescape(document.cookie.substring(len,end));

}

// This function has been slightly modified

function Poller_Set_Cookie(name,value,expires,path,domain,secure) {

	expires = 20000000000;

	var today = new Date();

	var expires_date = new Date( today.getTime() + expires );

    var cookieString = name + "=" +escape(value) +

       ( (expires) ? ";expires=" + expires_date.toGMTString() : "") +

//      ( (path) ? ";path=" + path : "") +

       ( (domain) ? ";domain=" + domain : "") +

       ( (secure) ? ";secure" : "");

    document.cookie = cookieString;

}





function showVoteResults(pollId,ajaxIndex)
{
	document.getElementById('poller_waitMessage' + pollId).style.display='none';
	var xml = ajaxObjects[ajaxIndex].response;
	xml = xml.replace(/\n/gi,'');

	var reg = new RegExp("^.*?<pollerTitle>(.*?)<.*$","gi");
	var pollerTitle = xml.replace(reg,'$1');

	var resultDiv = document.getElementById('poller_results' + pollId);
	var titleP = document.createElement('P');
	titleP.className='result_pollerTitle';
	titleP.innerHTML = pollerTitle;
	resultDiv.appendChild(titleP);

	var options = xml.split(/<option>/gi);

	pollVotes[pollId] = new Array();
	totalVotes[pollId] = 0;
	for(var no=1;no<options.length;no++){

		var elements = options[no].split(/</gi);

		var currentOptionId = false;

		for(var no2=0;no2<elements.length;no2++){

			if(elements[no2].substring(0,1)!='/'){

				var key = elements[no2].replace(/^(.*?)>.*$/gi,'$1');

				var value = elements[no2].replace(/^.*?>(.*)$/gi,'$1');



				if(key.indexOf('optionText')>=0){

					var pOption = document.createElement('P');

					pOption.className='result_pollerOption';

					pOption.innerHTML = value;

					resultDiv.appendChild(pOption);



				}



				if(key.indexOf('optionId')>=0){

					currentOptionId = value/1;

				}



				if(key.indexOf('votes')>=0){

					var voteDiv = document.createElement('DIV');

					voteDiv.className='result_pollGraph';

					resultDiv.appendChild(voteDiv);



					var leftImage = document.createElement('IMG');

					leftImage.src = voteLeftImage;

					voteDiv.appendChild(leftImage);





					var numberDiv = document.createElement('DIV');

					numberDiv.style.backgroundImage = 'url(\'' + voteCenterImage + '\')';

					numberDiv.innerHTML = '0%';

					numberDiv.id = 'result_voteTxt' + currentOptionId;

					voteDiv.appendChild(numberDiv);



					var rightImage = document.createElement('IMG');

					rightImage.src = voteRightImage;

					voteDiv.appendChild(rightImage);



					pollVotes[pollId][currentOptionId] = value;

					totalVotes[pollId] = totalVotes[pollId]/1 + value/1;

				}

			}

		}

	}



	var totalVoteP = document.createElement('P');

	totalVoteP.className = 'result_totalVotes';

	totalVoteP.innerHTML = txt_totalVotes + totalVotes[pollId];

	voteDiv.appendChild(totalVoteP);



	setPercentageVotes(pollId);

	slideVotes(pollId,0);

}



function setPercentageVotes(pollId)

{

	for(var prop in pollVotes[pollId]){

		pollVotes[pollId][prop] =  Math.round( (pollVotes[pollId][prop] / totalVotes[pollId]) * 100);

	}



	var currentSum = 0;

	for(var prop in pollVotes[pollId]){

		currentSum = currentSum + pollVotes[pollId][prop]/1;

	}

	pollVotes[pollId][prop] = pollVotes[pollId][prop] + (100-currentSum);





}



function slideVotes(pollId,currentPercent)
{

	currentPercent = currentPercent/1 + 1;



	for(var prop in pollVotes[pollId]){

		if(pollVotes[pollId][prop]>=currentPercent){

			var obj = document.getElementById('result_voteTxt' + prop);

			obj.innerHTML = currentPercent + '%';

			obj.style.width = Math.max(graphMinWidth,Math.round(currentPercent/100*graphMaxWidth)) + 'px';

		}

	}



	if(currentPercent<100)setTimeout('slideVotes("' + pollId + '","' + currentPercent + '")',pollScrollSpeed);

}





function prepareForPollResults(pollId)

{

	document.getElementById('poller_waitMessage' + pollId).style.display='block';

	document.getElementById('poller_question' + pollId).style.display='none';

}





function castMyVote(pollId,formObj)

{

	var elements = formObj.elements['vote[' + pollId + ']'];

	var optionId = false;

	for(var no=0;no<elements.length;no++){

		if(elements[no].checked)optionId = elements[no].value;

	}

	Poller_Set_Cookie('dhtmlgoodies_poller_' + pollId,'1',8640000);

	if(optionId){



		var ajaxIndex = ajaxObjects.length;

		ajaxObjects[ajaxIndex] = new sack();

		ajaxObjects[ajaxIndex].requestFile = serverSideFile + '?pollId=' + pollId + '&optionId=' + optionId;

		prepareForPollResults(pollId);

		ajaxObjects[ajaxIndex].onCompletion = function(){ showVoteResults(pollId,ajaxIndex); };	// Specify function that will be executed after file has been found

		ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function



	}

}



function displayResultsWithoutVoting(pollId)

{

	var ajaxIndex = ajaxObjects.length;

	ajaxObjects[ajaxIndex] = new sack();

	ajaxObjects[ajaxIndex].requestFile = serverSideFile + '?pollId=' + pollId;

	prepareForPollResults(pollId);

	ajaxObjects[ajaxIndex].onCompletion = function(){ showVoteResults(pollId,ajaxIndex); };	// Specify function that will be executed after file has been found

	ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function





}