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

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 = base_url + 'ajax/poller_cast_vote';

var voteLeftImage = base_url + 'css/images/graph_left_1.gif';

var voteRightImage = base_url + 'css/images/graph_right_1.gif';

var voteCenterImage = base_url + 'css/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 = 25;        // 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_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 = expires * 60*60*24*1000;

        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';

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

        

        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 clear = document.createElement('div');

        clear.style.clear = "both";

        resultDiv.appendChild(clear);

        

        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',6000000);

        if(optionId){

        

                var ajaxIndex = ajaxObjects.length;

                ajaxObjects[ajaxIndex] = new sack();

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

        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                

        

        

}