// this is the client side of the AJAX voting script

// note that the user_id|date_created are encoded here, and will be verified.

// this function receives the vote button submit event
// vote value v, page_id pid
function sendVote(v,pid)
{
//	var v = document.pgform.getElementByID(obj).value;
//	alert("You voted "+v+" on item "+pid+".");
	getXML(pid,v);
}


// quick wrapper for getElementById:
function _obj(id)
{
	return document.getElementById(id);
}

// quick wrapper for XML parsing getElementsByTagName:
// doc is an XMLResponse documentElement
function _xdoctag(doc,id)
{
	var child=doc.getElementsByTagName(id)[0];
	if (!child){  alert(id+" not found."); return ""; }
	child = child.firstChild;
	return (!child) ? "" : child.data;
}


// write html to the DOM object given by id
// if dbg=1, add a debug button (if global debug=1)
// if op=+, add to current value
function htmlPut(id, html)
{
	var obj = _obj(id);
//	alert("htmlPut("+id+", "+html+")");
	if (obj!=null){
		obj.innerHTML = html;
	}
}

//////////////
//---------- XML METHODS
//////////////

//
// this is called when an XML block is done loading
//
function xmlReturn (){
    if (req.readyState == 4) {    // if req shows "complete"
        if (req.status == 200) {        // if status="OK"
            // ...processing statements go here...
//	        showStatus("Ready");	// update status bar
	        //
			// for voting, it will return id,your_vote,total_vote
	        var err = _xdoctag(req.responseXML.documentElement,"error");
	        if (err>""){
	        	alert(err);
	        } else {
		        var id = _xdoctag(req.responseXML.documentElement,"page_id");
//		        var yours = _xdoctag(req.responseXML.documentElement,"your_vote");
		        var vcount = _xdoctag(req.responseXML.documentElement,"vote_count");
		        var total = _xdoctag(req.responseXML.documentElement,"total_vote");
	//	        debugPut("xmlReturn (): Method="+myMethod);
		        htmlPut("vote"+id, vcount);
		        htmlPut("total"+id, total);
		        htmlPut("divv"+id, yours);
		    }
        } else {
            alert("There was a problem retrieving the XML data:\n" + req.status + "\n" + req.statusText);
//	        showStatus(req.statusText);	// update status bar
        }
    }
}

//
// this is called to initiate an XML request
// xtype = type of data to get: Script|Node (must be capitalized, since it's used in an URL)
// id = id of object to retrieve
// 		can have extra parameters tacked onto id in &name=value format
//
function getXML(id,v) 
{
	var URL = "http://www.civilSimian.com/new/vote.fn.php?id="+id+"|"+v+"|"+dtc;
//	var URL = "http://69.94.102.86/civilsimian.com/new/vote.fn.php?id="+id+"|"+v+"|"+dtc;
//	alert("Sending AJAX call:\n"+URL);
	var waitmsg = "Waiting for XML.";
	debugtxt = "";		// clear debug buffer
//    debugPut(URL);	// update status bar
    if (window.XMLHttpRequest) {	    // branch for native XMLHttpRequest object
        req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {	    // branch for IE/Windows ActiveX version
        req = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
 //       debugPut("No request object.");	// update status bar
        return;
    }
    if (req) {
        req.onreadystatechange = xmlReturn;
//        showStatus(waitmsg);	// update status bar
        req.open("GET", URL, true);
        req.send(null);
    }
}