// loadXML.js
// Javascript functions used by the tutorial pages of linuxzoo.net
// Date    Author Prupose
// 21Dec04 AJC    Fix user name and password so that the values in the top right
//                get copied into hidden variables when check is done

function getXMLResponse(t,ci,addr){
  setDisplayWorking(ci);
  if (!addr) addr = "tut.cgi";
  addr += "?";
  //var a = new Array("xml","check","user","password");
  t.form["user"].value = document.forms["user"].elements["user"].value;
  t.form["password"].value = document.forms["user"].elements["password"].value;
  for (var i=0;i<t.form.elements.length;i++){
    addr += t.form.elements[i].name + "=" + encodeURIComponent(t.form.elements[i].value) + "&";
  }
  CJL_loadXmlDocument(addr,cbFun);
  return false;
}

function cbFun(xdoc){
//Call back function - this happens when xdoc has been retrieved
//(well subject to the following test for IE)

  if (( window.ActiveXObject && /Win/.test(navigator.userAgent) )
	 && xdoc.readyState != 4) return;
		 //IE calls several times
  //alert(xdoc.documentElement.tagName);
  var elem = xdoc.documentElement;
  if (!elem){
    alert("XML document returned with no content.");
    return;
  }
  var ci = elem.getAttribute("check");
  caption = document.getElementById('cap'+ci);
  if (elem.firstChild.nodeName == "error"){
    caption.replaceChild(document.createTextNode("Tests: Incomplete ("+
          elem.firstChild.getAttribute("prob")+" problem)"),
       caption.firstChild);
    var msg = "There was a problem and we were unable to complete the tests.\n\n";
    if (elem.firstChild.getAttribute("prob")=="host")
      msg = "The tests could not be completed.\n"+
            "We were unable to find to your virtual machine.\n"+
            "You must obtain a virtual machine to continue.\n"+
            "Visit http://linuxzoo.net to book a virtual machine.\n\n";
    if (elem.firstChild.getAttribute("prob")=="connection"){
      msg = "The tests could not be completed.\n"+
 	    "We found your virtual machine but unable to connect\n"+
	    "to it; perhaps it is not running.\n"+
 	    "You must boot your virtual machine to continue.\n"+
	    "Visit http://linuxzoo.net to boot your virtual machine.\n\n";
    }
    if (elem.firstChild.getAttribute("prob")=="login")
      msg = "The tests could not be completed.\n"+
	    "Your virtual machine is running but we could not log in.\n"+
	    "You must set up an account to allow us to log in to run\n"+
	    "our tests - please supply the details of an account we\n"+
	    "can use.\n"+
	    "Some tests may require the root account to be given.\n\n";
    msg += elem.firstChild.firstChild.data;
    //document.getElementById("detail"+ci).style.display='block';
    var ddetail = document.getElementById("ddetail"+ci);
    if (ddetail.firstChild)
	ddetail.removeChild(ddetail.firstChild);
    //ddetail.appendChild(document.createTextNode(msg));
    alert(msg);
    return;
  }
  var checks = elem.getElementsByTagName("check");
  for (var i=0;i<checks.length;i++){
    setDisplay(ci-1,i, checks[i].getAttribute("pass"));
  }
  setScores(ci-1,elem.getAttribute("newscore"));
}

function setDisplayWorking(ci){
  //Set the display to indicate we are waiting for a result
  var caption;
  caption = document.getElementById('cap'+ci);
  caption.replaceChild(document.createTextNode("Tests: Working..."),
	caption.firstChild);
  var span;
  for (var i=1;span=document.getElementById("spanc"+ci+":"+i);i++){
    span.replaceChild(document.createTextNode("WORKING"),span.firstChild);
    span.style.backgroundColor = "gray";
  }
}

function setDisplay(c,i,pass){
  // Called when return from xml - also called from onload to initialise
  // previous
  var passStr = pass?"PASSED":"FAILED";
  var ci = c+1;
  var ip = i+1;
  caption = document.getElementById('cap'+ci);
  caption.replaceChild(document.createTextNode("Tests: Complete"),
        caption.firstChild);
  var span = document.getElementById("spanc"+ci+":"+ip);
  if (span){
    //span.replaceChild(document.createTextNode(passStr),span.firstChild);
    span.firstChild.nodeValue = passStr;
    span.style.backgroundColor = (pass)?"green":"red";
  }
}

function setScores(a,b,c){
  // Called during initialisation
  a = a*1+1;
  var frm = document.getElementById("cs"+a);
  if (frm){
    frm.firstChild.nodeValue = b;
  }
  //else
  //  alert("Debug current score: a:"+a+" b:"+b+ " c:" + c);

  frm = document.getElementById("bs"+a);
  if (frm)
    if (c)
      frm.replaceChild(document.createTextNode(c),frm.firstChild);
    else
      frm.firstChild.nodeValue = Math.max(frm.firstChild.nodeValue,b);
  //else
  //  alert("Debug best score: a:"+a+" b:"+b+ " c:" + c);
}

function setCGI(a,b,c){
  // Called during initialisation
  var frm = document.getElementById("frm_"+a);
  //alert("a:"+a+" b:"+b + " c:" + c);
  if (frm && frm.elements && frm.elements[b])
    frm.elements[b].value = c;
  else
    alert("Debug: a:"+a+" b:"+b+ " c:" + c);
}

function toggle(i){
  var d = document.getElementById(i);
  if (d){
    d.style.display = (d.style.display=="none")?"block":"none";
  }
}

function CJL_loadXmlDocument(xmlFile, cbFun)
{
   if( window.ActiveXObject && /Win/.test(navigator.userAgent) )
   {
      xdoc = new ActiveXObject("Microsoft.XMLDOM");
      xdoc.async = true;
      xdoc.onreadystatechange = function(){cbFun(xdoc)};
      xdoc.load(xmlFile);
      //cbFun(xdoc);
      return true;
   }
   else if( document.implementation && document.implementation.createDocument )
   {
      xdoc = document.implementation.createDocument("", "", null);
      xdoc.load(xmlFile);
      xdoc.onload = function(){cbFun(xdoc)};
      return true;
   }
   else
   {
      return false;
   }
}