/************************************************************************************************************
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 = 'http://www.ukdebate.co.uk/opinion_polls/ajax-poller-cast-vote-php.php';
var voteLeftImage = 'http://www.ukdebate.co.uk/opinion_polls/images/graph_left_1.gif';
var voteRightImage = 'http://www.ukdebate.co.uk/opinion_polls/images/graph_right_1.gif';
var voteCenterImage = 'http://www.ukdebate.co.uk/opinion_polls/images/graph_middle_1.gif';

var graphMaxWidth = 220;        // It will actually be a little wider than this because of the rounded image at the left and right
var graphMinWidth = 50;        // Minimum size of graph
var pollScrollSpeed = 5;        // Lower = faster
var useCookiesToRememberCastedVotes = true;        // 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_Set_Cookie(name,value,days) {
        if (days) {
                var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
                var expires = "; expires="+date.toGMTString();
        }
        else var expires = "";
        document.cookie = name+"="+value+expires+"; path=/";
}

function Poller_Get_Cookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
}




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);

        // Removed by me - Shows  question and votes in FF
      //  var titleP = document.createElement('P');
      //   titleP.className='polltitle-result';
      //   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('ukd_poller_' + pollId,'1',6000000);
        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


}