//
// FAPWeb - Simple Web-based Demoparty Management System
// Party main screen viewer
// (C) Copyright 2012-2017 Tecnic Software productions (TNSP)
//

var failCount = 0;
var lastUpdate = 0;
var errorView = false;


function updateView(txt)
{
  var view = document.getElementById("mainView");
  if (view && txt != false && txt != "")
    view.innerHTML = txt;
}


function displayError()
{
  // Increase failure count
  if (++failCount >= 3 && !errorView)
  {
    errorView = true;
    updateView("<div class=\"slideHeader\"><div class=\"slideHeaderDiv\"></div></div><div class=\"slideText\"><div class=\"guru\">Software Failure.&nbsp;&nbsp;&nbsp;Press left mouse button to continue.<br />Guru Meditation #00000004.0000AAC0</div></div>");
  }
}


//
// Update view when triggered by main tick
//
function viewChanged()
{
  var msuccess2 = function(txt)
  {
    // Successfully fetched new data, initiate view update
    updateView(txt);
  }

  var msuccess1 = function(txt)
  {
    lastUpdate = txt;
    jsSendPOSTRequest("action=get&type=slide", msuccess2, displayError);
  }

  jsSendPOSTRequest("action=get&type=update", msuccess1, displayError);
}


//
// Main tick function, check for updates from server
//
var timeOutSet = false;

function tickMain()
{
  timeOutSet = false;

  var msuccess = function(txt)
  {
    failCount = 0;
    if (txt == "changed")
    {
      viewChanged();
      if (!timeOutSet)
      {
        setTimeout("tickMain();", 250);
        timeOutSet = true;
      }
    }
    else
    if (txt == "reload")
    {
      location.reload();
    }
    else
    {
      if (!timeOutSet)
      {
        setTimeout("tickMain();", 500);
        timeOutSet = true;
      }
    }
  }
  
  var mfail = function(txt)
  {
    displayError();
    if (!timeOutSet)
    {
      setTimeout("tickMain();", 5000);
      timeOutSet = true;
    }
  }

  jsSendPOSTRequest("action=check&lastUpdate="+lastUpdate, msuccess, mfail);
}

setTimeout("tickMain();", 100);
viewChanged();