/************************************************************************************************************
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 = '/ajax-poller-cast-vote-php.php';
var voteLeftImage = '/polls/ajaxPoller/images/graph_left_1.gif';
var voteRightImage = '/polls/ajaxPoller/images/graph_right_1.gif';
var voteCenterImage = '/polls/ajaxPoller/images/graph_middle_1.gif';

var graphMaxWidth = 230;    // 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 = 'Всего проголосовали: ';

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';
    
    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);
    resultDiv.innerHTML='';
    var titleP = document.createElement('P');
    titleP.className='textnews 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';
                    //voteDiv.className='ui-helper-reset ui-widget-header ui-corner-all';
                    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;
                }
            }
        }
    }
    
    if( !document.getElementById('poller_question' + pollId).voted){
        var retBtn = document.createElement('div'); 
        retBtn.className="ui-helper-reset ui-widget-header ui-corner-all";
        retBtn.onclick=showVoting;
        retBtn.innerHTML="Проголосовать";
        retBtn.pollId=pollId;
        retBtn.style.cursor="pointer";
        retBtn.style.width = "120px";
        retBtn.style.textAlign="center";
        retBtn.style.margin="auto";
        voteDiv.parentNode.appendChild(retBtn);
        
    }
    var totalVoteP = document.createElement('P');
    totalVoteP.className = 'result_totalVotes';
    totalVoteP.innerHTML = txt_totalVotes + totalVotes[pollId];
    voteDiv.parentNode.appendChild(totalVoteP);    
    resultDiv.style.display='block'; 
    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,show)
{
    if(!show){
        document.getElementById('poller_question' + pollId).voted=true;    
    }
    document.getElementById('poller_waitMessage' + pollId).style.display='block';
    document.getElementById('poller_question' + pollId).style.display='none';    
}

function showVoting(){
    document.getElementById('poller_question' + this.pollId).style.display='block';
    document.getElementById('poller_results' + this.pollId).style.display='none';     
}

function castMyVote(pollId,formObj,show)
{    
    //var vote[pollId];
    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||show){
    
        var ajaxIndex = ajaxObjects.length;
        ajaxObjects[ajaxIndex] = new sack();
        ajaxObjects[ajaxIndex].requestFile = serverSideFile + '?pollId=' + pollId + '&optionId=' + optionId;
        prepareForPollResults(pollId,show);
        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        
    
    
}