var mas = mas || new Object();
mas.calendar = new Object();
mas.calendar.private = new Object();
mas.calendar.private.curriculum_groups_file = new Array();
mas.calendar.private.curriculum_classes_file = new Array();
mas.calendar.private.groups_url_sources = null;

mas.calendar.curriculums = null;
mas.calendar.groups = null;
mas.calendar.classes = null;
mas.calendar.output_url = null;
mas.calendar.qrcode = null;
mas.calendar.url_sources = null;

mas.calendar.private.add_curriculum =
function (id, fullname, groups, classes)
{
   var entry;

   if (fullname == "")
   {
      return;
   }

   entry = "<option value=" + id + ">" + fullname + "</option>";

   mas.calendar.curriculums.innerHTML = entry + mas.calendar.curriculums.innerHTML;

   mas.calendar.private.curriculum_groups_file[id] = groups;
   mas.calendar.private.curriculum_classes_file[id] = classes;
};

mas.calendar.private.add_group =
function (data)
{
   var entry, i, url_sources;

   if (data[0] == "")
   {
      return;
   }

   url_sources = new Array();

   for (i = 3; i < data.length; i += 2)
   {
      url_sources.push(data[i]);
   }

   mas.calendar.private.groups_url_sources[data[1]] = url_sources;

   entry = "<option value=" + data[1] + ">" + data[0] + "</option>";

   mas.calendar.groups.innerHTML = entry + mas.calendar.groups.innerHTML;
};

mas.calendar.private.add_class =
function (fullname, id)
{
   var entry;

   if (fullname == "")
   {
      return;
   }

   entry =
   (
      "<tr><td class=\"class_checkbox\"><input type=\"checkbox\" "
      + "onclick=\"mas.calendar.generate_url();\" name=\"classes\" value=\""
      + id
      + "\" /></td><td class=\"class_id\">"
      + id
      + "</td><td class=\"class_fullname\">"
      + fullname
      + "</td></tr>"
   );

   mas.calendar.classes.innerHTML = entry + mas.calendar.classes.innerHTML;
};

mas.calendar.private.load_curriculums =
function ()
{
   var lines, i, val;

   lines = this.responseText.split('\n');

   for (i = lines.length; i --> 0;)
   {
      val = lines[i].split("::");
      mas.calendar.private.add_curriculum(i, val[0], val[1], val[2]);
   }

   mas.calendar.select_curriculum();
};

mas.calendar.private.load_groups =
function ()
{
   var lines, i, j, val;

   mas.calendar.groups.innerHTML = "";
   mas.calendar.private.groups_url_sources = new Array();

   lines = this.responseText.split('\n');

   for (i = lines.length; i --> 0;)
   {
      val = lines[i].split("::");
      mas.calendar.private.add_group(val);
   }

   mas.calendar.select_group();
};

mas.calendar.private.load_classes =
function ()
{
   var lines, i, val;

   mas.calendar.classes.innerHTML = "";

   lines = this.responseText.split('\n');

   for (i = lines.length; i --> 0;)
   {
      val = lines[i].split("::");
      mas.calendar.private.add_class(val[0], val[2]);
   }

   mas.calendar.generate_url();
};

mas.calendar.private.get_file =
function (file, fun)
{
   var req
   req = new XMLHttpRequest();

   req.onload = fun;

   req.open("get", file, true);
   req.send();
};

mas.calendar.select_curriculum =
function ()
{
   var fullname;

   fullname = mas.calendar.curriculums.value;

   mas.calendar.private.get_file
   (
      ("data/" + mas.calendar.private.curriculum_groups_file[fullname]),
      mas.calendar.private.load_groups
   );

   mas.calendar.private.get_file
   (
      ("data/" + mas.calendar.private.curriculum_classes_file[fullname]),
      mas.calendar.private.load_classes
   );
};

mas.calendar.select_group =
function ()
{
   var data, i, result;

   mas.calendar.url_sources.innerHTML = "";

   data = mas.calendar.private.groups_url_sources[mas.calendar.groups.value];
   result = "";

   for (i = 0; i < data.length; ++i)
   {
      result += "<li>" + data[i] + "</li>";
   }

   mas.calendar.url_sources.innerHTML = result;
};

mas.calendar.populate =
function ()
{
   mas.calendar.curriculums = document.getElementById("curriculums");
   mas.calendar.groups = document.getElementById("groups");
   mas.calendar.classes = document.getElementById("classes");
   mas.calendar.output_url = document.getElementById("output_url");
   mas.calendar.qrcode = document.getElementById("qrcode");
   mas.calendar.url_sources = document.getElementById("url_sources");

   mas.calendar.private.get_file
   (
      "data/CURRICULUMS",
      mas.calendar.private.load_curriculums
   );
};

mas.calendar.generate_url =
function ()
{
   var url, loc, i, classes;

   url = document.location.href.toString();
   loc = url.substring(0, (url.lastIndexOf("/") + 1));
   loc = loc + "get.php?g=" + mas.calendar.groups.value + "&m=unknown,";

   classes = document.getElementsByName("classes");

   for (i = classes.length; i --> 0;)
   {
      if (classes[i].checked)
      {
         loc = loc + classes[i].value + ",";
      }
   }

   loc = loc.substring(0, (loc.length - 1));

   mas.calendar.qrcode.innerHTML= "";
   mas.calendar.output_url.setAttribute("value", loc);
   jQuery('#qrcode').qrcode(loc);
};