// Build 1900

//AJAX Contentloader

var net=new Object();

net.READY_STATE_UNINITIALIZED=0;
net.READY_STATE_LOADING=1;
net.READY_STATE_LOADED=2;
net.READY_STATE_INTERACTIVE=3;
net.READY_STATE_COMPLETE=4;

/*--- content loader object for cross-browser requests ---*/
net.ContentLoader=function(url,onload,onerror,method,params,contentType){
  this.req=null;
  this.onload=onload;
  this.url=url;
  this.onerror=(onerror) ? onerror : this.defaultError;
  showNotification('loading'); 											//Show note
  this.loadXMLDoc(url,method,params,contentType);
}

net.ContentLoader.prototype.loadXMLDoc=function(url,method,params,contentType){
  if (!method){
    method="GET";
  }
  if (!contentType && method=="POST"){
    contentType='application/x-www-form-urlencoded';
  }
  if (window.XMLHttpRequest){
    this.req=new XMLHttpRequest();
  } else if (window.ActiveXObject){
    this.req=new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (this.req){
    try{
      var loader=this;
      this.req.onreadystatechange=function(){
        net.ContentLoader.onReadyState.call(loader);
      }
      this.req.open(method,url,true);
      if (contentType){
        this.req.setRequestHeader('Content-Type', contentType);
      }
      this.req.send(params);
    }catch (err){
      this.onerror.call(this);
    }
  }
}

net.ContentLoader.onReadyState=function(){
  var req=this.req;
  var ready=req.readyState;
  if (ready==net.READY_STATE_COMPLETE){
	var httpStatus=this.req.status;
	hideNotification();													//Hide Note
    if (httpStatus==200 || httpStatus==0){
      this.onload.call(this);
    }else{
      this.onerror.call(this);
    }
  }
}

net.ContentLoader.prototype.defaultError=function(){
  alert("error fetching data!"
    +"\n\nreadyState:"+this.req.readyState
    +"\nstatus: "+this.req.status
    +"\nheaders: "+this.req.getAllResponseHeaders());
}

/*********** RPC-like Call Send/Receive functions *******/

/******* Send functions *******/

function sendRPC(cmdArr)
{
	var xml = buildRpcXML(cmdArr);
	var loader=new net.ContentLoader('ws.php5',processResponse,null,'POST',xml);
}

function buildRpcXML(cmdArr)
{
	if(document.implementation.createDocument){ 
	  xmldoc = document.implementation.createDocument("", "envelope", null); 
	} else { 
  	  xmldoc = new ActiveXObject("Microsoft.XMLDOM"); 
      var root = xmldoc.createDocumentFragment(); 
      xmlElem = xmldoc.createElement("envelope"); 
      root.appendChild(xmlElem); 
      xmldoc.appendChild(root); 
    } 

	if(!xmldoc.documentElement) {  
		var newRootElement = xmldoc.createDocumentFragment();	
		newRootElement.appendChild(xmldoc.createElement("envelope"));
		xmldoc.appendChild(newRootElement);
	}

	var bdy=xmldoc.createElement('body');	
	var root=xmldoc.documentElement;
	
	for(var i=0;i<cmdArr.length;i++){
		var cmd = cmdArr[i];
		var rpcNode=xmldoc.createElement('rpc');
		
			for(var j=0;j<cmd.length;j++){
				var param = cmd[j];
				if(param[0]=='rpcCommand'){
					rpcNode.setAttribute('value',param[1]);
				} else {
					var paramNode=xmldoc.createElement(param[0]);
					var paramValue=xmldoc.createTextNode(param[1]);
					paramNode.appendChild(paramValue);
					rpcNode.appendChild(paramNode);
				}
			}
		bdy.appendChild(rpcNode);
	}
	root.appendChild(bdy);
	return xmldoc;
}

/******* Handle RPC Call Response *******/

function processResponse()
{
	//alert(this.req.responseText); //Debug
	var xmlResponse = this.req.responseXML;
	var docRoot=xmlResponse.getElementsByTagName('envelope')[0];
	var rpcNodes=docRoot.getElementsByTagName('rpc');
	for(var i=0;i<rpcNodes.length;i++){
		var rpcNode=rpcNodes[i];
		var params=parseParams(rpcNode);
		var rpcValue=rpcNode.attributes.getNamedItem('value').value;
		var processCmd='process_'+rpcValue+'(params)';
		eval(processCmd);
	} 
}

function parseParams(rpcNode) //Parse RPC node to javascript array
{
	var params=new Array();
	var children=rpcNode.childNodes;
	for(var i=0;i<children.length;i++)
	{
		var node=children[i];
		if(node.nodeType==1){
			var firstChild=node.firstChild;
			if(firstChild.nodeType!=1) var firstChild=node.childNodes[1]; //Skip whitespace in firefox
			if(firstChild && firstChild.hasChildNodes()){
				params[node.nodeName]=new Array();
				for(var i=0;i<node.childNodes.length;i++){
					if(node.childNodes[i].nodeType==1){
						var subNode=node.childNodes[i];
						var subNodefirstChild=subNode.firstChild;
						if(subNodefirstChild.nodeType!=1) var subNodefirstChild=subNode.childNodes[1]; //Skip whitespace in firefox
						if(subNodefirstChild && subNodefirstChild.hasChildNodes()){
							var temp = new Array();
							for(var j=0;j<subNode.childNodes.length;j++){
								if(subNode.childNodes[j].nodeType==1){
									var endNode=subNode.childNodes[j];
									var endNodeValue=endNode.firstChild.nodeValue;
									temp[endNode.nodeName]=endNodeValue;
								}
							}
							params[node.nodeName].push(temp);
						} else{
							var nodeValue=subNode.firstChild.nodeValue;
							params[node.nodeName].push(nodeValue);
						}
					}
				}
			} else {
				params[node.nodeName]=node.firstChild.nodeValue;
			}
		}
	}
	return params;
}