// all utility functions go in here

function makeUrl(page, query, html_friendly)
{
  url = contentPath+page;
  if(url.indexOf('?') > 0) sep = '&';
  else sep = '?';
  if(query)
  {
    url = url + sep + query;
  }
  if(html_friendly)
  {
    url = url.replace('&', '&');
    url = url.replace('<', '&lt;');
    url = url.replace('>', '&gt;');
  }
  return url;
}

function makeUrlNS(namespace, page, query, html_friendly)
{
  var url = contentPath+namespace_list[namespace]+(page.replace(/ /g, '_'));
  if(url.indexOf('?') > 0) sep = '&';
  else sep = '?';
  if(query)
  {
    url = url + sep + query;
  }
  if(html_friendly)
  {
    url = url.replace('&', '&amp;');
    url = url.replace('<', '&lt;');
    url = url.replace('>', '&gt;');
  }
  return append_sid(url);
}

function strToPageID(string)
{
  // Convert Special:UploadFile to ['UploadFile', 'Special'], but convert 'Image:Enano.png' to ['Enano.png', 'File']
  for(var i in namespace_list)
    if(namespace_list[i] != '')
      if(namespace_list[i] == string.substr(0, namespace_list[i].length))
        return [string.substr(namespace_list[i].length), i];
  return [string, 'Article'];
}

function append_sid(url)
{
  sep = ( url.indexOf('?') > 0 ) ? '&' : '?';
  if(ENANO_SID.length > 10)
  {
    url = url + sep + 'auth=' + ENANO_SID;
    sep = '&';
  }
  if ( pagepass.length > 0 )
  {
    url = url + sep + 'pagepass=' + pagepass;
  }
  return url;
}

var stdAjaxPrefix = append_sid(scriptPath+'/ajax.php?title='+title);

/**
 * Core AJAX library
 */

function ajaxMakeXHR()
{
  var ajax;
  if (window.XMLHttpRequest) {
    ajax = new XMLHttpRequest();
  } else {
    if (window.ActiveXObject) {           
      ajax = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
      alert('Enano client-side runtime error: No AJAX support, unable to continue');
      return;
    }
  }
  return ajax;
}

function ajaxGet(uri, f, call_editor_safe) {
  // Is the editor open?
  if ( editor_open && !call_editor_safe )
  {
    // Make sure the user is willing to close the editor
    var conf = confirm($lang.get('editor_msg_confirm_ajax'));
    if ( !conf )
    {
      // Kill off any "loading" windows, etc. and cancel the request
      unsetAjaxLoading();
      return false;
    }
    // The user allowed the editor to be closed. Reset flags and knock out the on-close confirmation.
    editor_open = false;
    enableUnload();
  }
  ajax = ajaxMakeXHR();
  if ( !ajax )
  {
    console.error('ajaxMakeXHR() failed');
    return false;
  }
  ajax.onreadystatechange = f;
  ajax.open('GET', uri, true);
  ajax.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
  ajax.send(null);
}

function ajaxPost(uri, parms, f, call_editor_safe) {
  // Is the editor open?
  if ( editor_open && !call_editor_safe )
  {
    // Make sure the user is willing to close the editor
    var conf = confirm($lang.get('editor_msg_confirm_ajax'));
    if ( !conf )
    {
      // Kill off any "loading" windows, etc. and cancel the request
      unsetAjaxLoading();
      return false;
    }
    // The user allowed the editor to be closed. Reset flags and knock out the on-close confirmation.
    editor_open = false;
    enableUnload();
  }
  ajax = ajaxMakeXHR();
  if ( !ajax )
  {
    console.error('ajaxMakeXHR() failed');
    return false;
  }
  ajax.onreadystatechange = f;
  ajax.open('POST', uri, true);
  ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  // Setting Content-length in Safari triggers a warning
  if ( !is_Safari )
  {
    ajax.setRequestHeader("Content-length", parms.length);
  }
  ajax.setRequestHeader("Connection", "close");
  ajax.send(parms);
}

/**
 * Show a friendly error message depicting an AJAX response that is not valid JSON
 * @param string Response text
 * @param string Custom error message. If omitted, the default will be shown.
 */

function handle_invalid_json(response, customerror)
{
  load_component('messagebox');
  load_component('SpryEffects');
  load_component('fadefilter');
  load_component('flyin');
  load_component('l10n');
  
  darken(aclDisableTransitionFX);
  
  var box = document.createElement('div');
  var mainwin = document.createElement('div');
  var panel = document.createElement('div');
  
  //
  // main window
  //
  
    mainwin.style.padding = '10px';
    mainwin.style.width = '580px';
    mainwin.style.height = '360px';
    mainwin.style.clip = 'rect(0px,auto,auto,0px)';
    mainwin.style.overflow = 'auto';
    mainwin.style.backgroundColor = '#ffffff';
  
    // Title
    var h3 = document.createElement('h3');
    var h3_text = ( $lang.placeholder ) ? 'The site encountered an error while processing your request.' : $lang.get('ajax_badjson_title');
    h3.appendChild(document.createTextNode(h3_text));
    mainwin.appendChild(h3);
    
    if ( typeof(customerror) == 'string' )
    {
      var el = document.createElement('p');
      el.appendChild(document.createTextNode(customerror));
      mainwin.appendChild(el);
    }
    else
    {
      var error = 'We unexpectedly received the following response from the server. The response should have been in the JSON ';
      error += 'serialization format, but the response wasn\'t composed only of the JSON response. There are three possible triggers ';
      error += 'for this problem:';
      customerror = ( $lang.placeholder ) ? error : $lang.get('ajax_badjson_body');
      var el = document.createElement('p');
      el.appendChild(document.createTextNode(customerror));
      mainwin.appendChild(el);
      var ul = document.createElement('ul');
      var li1 = document.createElement('li');
      var li2 = document.createElement('li');
      var li3 = document.createElement('li');
      var li1_text = ( $lang.placeholder ) ? 'The server sent back a bad HTTP response code and thus sent an error page instead of running Enano. This indicates a possible problem with your server, and is not likely to be a bug with Enano.' : $lang.get('ajax_badjson_tip1');
      var li2_text = ( $lang.placeholder ) ? 'The server sent back the expected JSON response, but also injected some code into the response that should not be there. Typically this consists of advertisement code. In this case, the administrator of this site will have to contact their web host to have advertisements disabled.' : $lang.get('ajax_badjson_tip2');
      var li3_text = ( $lang.placeholder ) ? 'It\'s possible that Enano triggered a PHP error or warning. In this case, you may be looking at a bug in Enano.' : $lang.get('ajax_badjson_tip3');
      var osc_ex_data = ( $lang.placeholder ) ? 'This is KNOWN to be the case with the OpenSourceCMS.com demo version of Enano.' : $lang.get('ajax_badjson_osc');
      li1.appendChild(document.createTextNode(li1_text));
      var osc_exception = ( window.location.hostname == 'demo.opensourcecms.com' ) ? ' ' + osc_ex_data : '';
      li2.appendChild(document.createTextNode(li2_text + osc_exception));
      li3.appendChild(document.createTextNode(li3_text));
        
      ul.appendChild(li1);
      ul.appendChild(li2);
      ul.appendChild(li3);
      mainwin.appendChild(ul);
    }
    
    var p2 = document.createElement('p');
    var p2_text = ( $lang.placeholder ) ? 'The response received from the server is as follows:' : $lang.get('ajax_badjson_msg_response');
    p2.appendChild(document.createTextNode(p2_text));
    mainwin.appendChild(p2);
    
    var pre = document.createElement('pre');
    pre.appendChild(document.createTextNode(response));
    mainwin.appendChild(pre);
    
    var p3 = document.createElement('p');
    var p3_text = $lang.placeholder ? 'You may also choose to view the response as HTML.' : $lang.get('ajax_badjson_msg_viewashtml');
    p3.appendChild(document.createTextNode(p3_text + ' '));
    var a = document.createElement('a');
    var a_text = $lang.placeholder ? 'View as HTML' : $lang.get('ajax_badjson_btn_viewashtml');
    a.appendChild(document.createTextNode(a_text + '...'));
    a._resp = response;
    a.onclick = function()
    {
      var vah_title = ( $lang.placeholder ) ? 'View the response as HTML?' : $lang.get('ajax_badjson_html_confirm_title');
      var vah_body = ( $lang.placeholder ) ? 'If the server\'s response was modified by an attacker to include malicious code, viewing the response as HTML might allow that malicious code to run. Only continue if you have inspected the response text and verified that it is safe.' : $lang.get('ajax_badjson_html_confirm_body');
      var btn_confirm = $lang.placeholder ? 'View as HTML' : $lang.get('ajax_badjson_btn_viewashtml');
      var btn_cancel = $lang.placeholder ? 'Cancel' : $lang.get('etc_cancel');
      var mp = miniPromptMessage({
          title: vah_title,
          message: vah_body,
          buttons: [
            {
              text: btn_confirm,
              color: 'blue',
              style: {
                fontWeight: 'bold'
              },
              onclick: function() {
                var mp = miniPromptGetParent(this);
                var win = window.open('about:blank', 'invalidjson_htmlwin', 'width=550,height=400,status=no,toolbars=no,toolbar=no,address=no,scroll=yes');
                win.document.write(mp._response);
                win.document.close();
                miniPromptDestroy(this);
              }
            },
            {
              text: btn_cancel,
              onclick: function() {
                miniPromptDestroy(this);
              }
            }
          ]
        });
      mp._response = this._resp;
      return false;
    }
    a.href = '#';
    p3.appendChild(a);
    mainwin.appendChild(p3);
  
  //
  // panel
  //
  
    panel.style.backgroundColor = '#D0D0D0';
    panel.style.textAlign = 'right';
    panel.style.padding = '0 10px';
    panel.style.lineHeight = '40px';
    panel.style.width = '580px';
    
    var closer = document.createElement('input');
    var btn_close = $lang.placeholder ? 'Close' : $lang.get('ajax_badjson_btn_close');
    closer.type = 'button';
    closer.value = btn_close;
    closer.onclick = function()
    {
      var parentdiv = this.parentNode.parentNode;
      if ( aclDisableTransitionFX )
      {
        parentdiv.parentNode.removeChild(parentdiv);
        enlighten(aclDisableTransitionFX);
      }
      else
      {
        var effect = new Spry.Effect.Blind(parentdiv, {
            from: '100%',
            to: '0%',
            duration: '1000'
          });
        var observer = {
          onPostEffect: function()
            {
              parentdiv.parentNode.removeChild(parentdiv);
              enlighten();
            }
          };
        effect.addObserver(observer);
        effect.start();
      }
    }
    panel.appendChild(closer);
    
  //
  // put it together
  //
  
    box.appendChild(mainwin);
    box.appendChild(panel);
    
    // add it to the body to allow height/width calculation
    
    box.style.display = 'block';
    box.style.position = 'absolute';
    box.style.zIndex = getHighestZ() + 1;
    domObjChangeOpac(0, box);
    
    var body = document.getElementsByTagName('body')[0];
    body.appendChild(box);
    
    
    // calculate position of the box
    // box should be exactly 640px high, 480px wide
    var top = ( getHeight() / 2 ) - ( $(box).Height() / 2 ) + getScrollOffset();
    var left = ( getWidth() / 2 ) - ( $(box).Width() / 2 );
    console.debug('top = %d, left = %d', top, left);
    box.style.top = top + 'px';
    box.style.left = left + 'px';
    
    // we have width and height, set display to none and reset opacity
    if ( aclDisableTransitionFX )
    {
      domObjChangeOpac(100, box);
      box.style.display = 'block';
    }
    else
    {
      box.style.display = 'none';
      domObjChangeOpac(100, box);
      
      setTimeout(function()
        {
          (new Spry.Effect.Blind(box, {
              from: '0%',
              to: '100%',
              duration: 1000
            })).start();
        }, 1000);
    }
}

/**
 * Verify that a string is roughly a valid JSON object. Warning - this is only a very cheap syntax check.
 * @param string
 * @return bool true if JSON is valid
 */

function check_json_response(response)
{
  response = trim(response);
  if ( response.substr(0, 1) == '{' && response.substr(response.length - 1, 1) == '}' )
  {
    return true;
  }
  return false;
}

function ajaxEscape(text)
{
  /*
  text = escape(text);
  text = text.replace(/\+/g, '%2B', text);
  */
  text = window.encodeURIComponent(text);
  return text;
}

/**
 * String functions
 */

// Equivalent to PHP trim() function
function trim(text)
{
  text = text.replace(/^([\s]+)/, '');
  text = text.replace(/([\s]+)$/, '');
  return text;
}

// Equivalent to PHP implode() function
function implode(chr, arr)
{
  if ( typeof ( arr.toJSONString ) == 'function' )
    delete(arr.toJSONString);
  
  var ret = '';
  var c = 0;
  for ( var i in arr )
  {
    if(i=='toJSONString')continue;
    if ( c > 0 )
      ret += chr;
    ret += arr[i];
    c++;
  }
  return ret;
}

function form_fetch_field(form, name)
{
  var fields = form.getElementsByTagName('input');
  if ( fields.length < 1 )
    return false;
  for ( var i = 0; i < fields.length; i++ )
  {
    var field = fields[i];
    if ( field.name == name )
      return field;
  }
  return false;
}

function get_parent_form(o)
{
  if ( !o.parentNode )
    return false;
  if ( o.tagName == 'FORM' )
    return o;
  var p = o.parentNode;
  while(true)
  {
    if ( p.tagName == 'FORM' )
      return p;
    else if ( !p )
      return false;
    else
      p = p.parentNode;
  }
}

function findParentForm(o)
{
  return get_parent_form(o);
}

function domObjChangeOpac(opacity, id) {
    var object = id.style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}

function getScrollOffset()
{
  var position;
  if (self.pageYOffset)
  {
    position = self.pageYOffset;
  }
  else if (document.documentElement && document.documentElement.scrollTop)
  {
    position = document.documentElement.scrollTop;
  }
  else if (document.body)
  {
    position = document.body.scrollTop;
  }
  return position;
}

function setScrollOffset(offset)
{
  window.scroll(0, offset);
}

// Function to fade classes info-box, warning-box, error-box, etc.

function fadeInfoBoxes()
{
  var divs = new Array();
  d = document.getElementsByTagName('div');
  j = 0;
  for(var i in d)
  {
    if ( !d[i] )
      continue;
    if ( !d[i].tagName )
      continue;
    if(d[i].className=='info-box' || d[i].className=='error-box' || d[i].className=='warning-box' || d[i].className=='question-box')
    {
      divs[j] = d[i];
      j++;
    }
  }
  if(divs.length < 1) return;
  load_component('fat');
  for(i in divs)
  {
    if(!divs[i].id) divs[i].id = 'autofade_'+Math.floor(Math.random() * 100000);
    switch(divs[i].className)
    {
      case 'info-box':
      default:
        from = '#3333FF';
        break;
      case 'error-box':
        from = '#FF3333';
        break;
      case 'warning-box':
        from = '#FFFF33';
        break;
      case 'question-box':
        from = '#33FF33';
        break;
    }
    Fat.fade_element(divs[i].id,30,2000,from,Fat.get_bgcolor(divs[i].id));
  }
}

addOnloadHook(fadeInfoBoxes);

// Alpha fades

function opacity(id, opacStart, opacEnd, millisec)
{
    var object = document.getElementById(id);
    domOpacity(object, opacStart, opacEnd, millisec);
}

var opacityDOMCache = new Object();
function domOpacity(obj, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;
    
    // unique ID for this animation
    var uniqid = Math.floor(Math.random() * 1000000);
    opacityDOMCache[uniqid] = obj;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("var obj = opacityDOMCache["+uniqid+"]; domObjChangeOpac(" + i + ",obj)",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("var obj = opacityDOMCache["+uniqid+"]; domObjChangeOpac(" + i + ",obj)",(timer * speed));
            timer++;
        }
    }
    setTimeout("delete(opacityDOMCache["+uniqid+"]);",(timer * speed));
}

// change the opacity for different browsers
function changeOpac(opacity, id)
{
  var object = document.getElementById(id);
  return domObjChangeOpac(opacity, object);
}

// draw a white ajax-ey "loading" box over an object
function whiteOutElement(el)
{
  var top = $(el).Top();
  var left = $(el).Left();
  var width = $(el).Width();
  var height = $(el).Height();
  
  var blackout = document.createElement('div');
  blackout.style.position = 'absolute';
  blackout.style.top = top + 'px';
  blackout.style.left = left + 'px';
  blackout.style.width = width + 'px';
  blackout.style.height = height + 'px';
  
  blackout.style.backgroundColor = '#FFFFFF';
  domObjChangeOpac(60, blackout);
  var background = ( $(el).Height() < 48 ) ? 'url(' + scriptPath + '/images/loading.gif)' : 'url(' + scriptPath + '/includes/clientside/tinymce/themes/advanced/skins/default/img/progress.gif)';
  blackout.style.backgroundImage = background;
  blackout.style.backgroundPosition = 'center center';
  blackout.style.backgroundRepeat = 'no-repeat';
  blackout.style.zIndex = getHighestZ() + 2;
  
  var body = document.getElementsByTagName('body')[0];
  body.appendChild(blackout);
  
  return blackout;
}

/**
 * Take a div generated by whiteOutElement() and report success using the glossy "check" graphic. Sets the image, then
 * briefly fades in, then fades out and destroys the box so as to re-allow control over the underlying element
 */

function whiteOutReportSuccess(whitey)
{
  // fade the status indicator in and then out
  whitey.style.backgroundImage = 'url(' + scriptPath + '/images/check.png)';
  domOpacity(whitey, 60, 80, 500);
  setTimeout(function()
    {
      domOpacity(whitey, 60, 0, 500);
    }, 750);
  setTimeout(function()
    {
      whitey.parentNode.removeChild(whitey);
    }, 1250);
}

// other DHTML functions

function fetch_offset(obj)
{
  var left_offset = obj.offsetLeft;
  var top_offset = obj.offsetTop;
  while ((obj = obj.offsetParent) != null) {
    left_offset += obj.offsetLeft;
    top_offset += obj.offsetTop;
  }
  return { 'left' : left_offset, 'top' : top_offset };
}

function fetch_dimensions(o) {
  var w = o.offsetWidth;
  var h = o.offsetHeight;
  return { 'w' : w, 'h' : h };
}

function findParentForm(o)
{
  if ( o.tagName == 'FORM' )
    return o;
  while(true)
  {
    o = o.parentNode;
    if ( !o )
      return false;
    if ( o.tagName == 'FORM' )
      return o;
  }
  return false;
}

function bannerOn(text)
{
  darken(true);
  var thediv = document.createElement('div');
  thediv.className = 'mdg-comment';
  thediv.style.padding = '0';
  thediv.style.marginLeft = '0';
  thediv.style.position = 'absolute';
  thediv.style.display = 'none';
  thediv.style.padding = '4px';
  thediv.style.fontSize = '14pt';
  thediv.id = 'mdgDynamic_bannerDiv_'+Math.floor(Math.random() * 1000000);
  thediv.innerHTML = text;
  
  var body = document.getElementsByTagName('body');
  body = body[0];
  body.appendChild(thediv);
  body.style.cursor = 'wait';
  
  thediv.style.display = 'block';
  dim = fetch_dimensions(thediv);
  thediv.style.display = 'none';
  bdim = { 'w' : getWidth(), 'h' : getHeight() };
  so = getScrollOffset();
  
  var left = (bdim['w'] / 2) - ( dim['w'] / 2 );
  
  var top  = (bdim['h'] / 2);
  top  = top - ( dim['h'] / 2 );
  
  top = top + so;
  
  thediv.style.top  = top  + 'px';
  thediv.style.left = left + 'px';
  
  thediv.style.display = 'block';
  
  return thediv.id;
}

function bannerOff(id)
{
  e = document.getElementById(id);
  if(!e) return;
  e.innerHTML = '';
  e.style.display = 'none';
  var body = document.getElementsByTagName('body');
  body = body[0];
  body.style.cursor = 'default';
  enlighten(true);
}

function disableUnload(message)
{
  if(typeof message != 'string') message = 'You may want to save your changes first.';
  window._unloadmsg = message;
  window.onbeforeunload = function(e)
  {
    if ( !e )
      e = window.event;
    e.returnValue = window._unloadmsg;
  }
}

function enableUnload()
{
  window._unloadmsg = null;
  window.onbeforeunload = null;
}

/**
 * Gets the highest z-index of all divs in the document
 * @return integer
 */
function getHighestZ()
{
  z = 0;
  var divs = document.getElementsByTagName('div');
  for(var i = 0; i < divs.length; i++)
  {
    if(divs[i].style.zIndex > z) z = divs[i].style.zIndex;
  }
  return parseInt(z);
}

var shift = false;
function isKeyPressed(event)
{
  if (event.shiftKey==1)
  {
    shift = true;
  }
  else
  {
    shift = false;
  }
}

function moveDiv(div, newparent)
{
  var backup = div;
  var oldparent = div.parentNode;
  oldparent.removeChild(div);
  newparent.appendChild(backup);
}

var busyBannerID;
function goBusy(msg)
{
  if(!msg) msg = 'Please wait...';
  body = document.getElementsByTagName('body');
  body = body[0];
  body.style.cursor = 'wait';
  busyBannerID = bannerOn(msg);
}

function unBusy()
{
  body = document.getElementsByTagName('body');
  body = body[0];
  body.style.cursor = 'default';
  bannerOff(busyBannerID);
}

function setAjaxLoading()
{
  if ( document.getElementById('ajaxloadicon') )
  {
    document.getElementById('ajaxloadicon').src=ajax_load_icon;
  }
}

function unsetAjaxLoading()
{
  if ( document.getElementById('ajaxloadicon') )
  {
    document.getElementById('ajaxloadicon').src=cdnPath + '/images/spacer.gif';
  }
}

function readCookie(name) {var nameEQ = name + "=";var ca = document.cookie.split(';');for(var i=0;i < ca.length;i++){var c = ca[i];while (c.charAt(0)==' ') c = c.substring(1,c.length);if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);}return null;}
function createCookie(name,value,days){if (days){var date = new Date();date.setTime(date.getTime()+(days*24*60*60*1000));var expires = "; expires="+date.toGMTString();}else var expires = "";document.cookie = name+"="+value+expires+"; path=/";}
function eraseCookie(name) {createCookie(name,"",-1);}

/*
 * AJAX login box (experimental)
 * Moved / rewritten in login.js
 */

// Included only for API-compatibility
function ajaxPromptAdminAuth(call_on_ok, level)
{
  ajaxLogonInit(call_on_ok, level);
}

/**
 * Insert a DOM object _after_ the specified child.
 * @param object Parent node
 * @param object Node to insert
 * @param object Node to insert after
 */

function insertAfter(parent, baby, bigsister)
{
  try
  {
    if ( parent.childNodes[parent.childNodes.length-1] == bigsister )
      parent.appendChild(baby);
    else
      parent.insertBefore(baby, bigsister.nextSibling);
  }
  catch(e)
  {
    alert(e.toString());
    if ( window.console )
    {
      // Firebug support
      window.console.warn(e);
    }
  }
}

/**
 * Validates an e-mail address.
 * @param string E-mail address
 * @return bool
 */

function validateEmail(email)
{
  return ( email.match(/^(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|"[^\\\x80-\xff\n\015"]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015"]*)*")[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:\.[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|"[^\\\x80-\xff\n\015"]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015"]*)*")[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)*@[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:\.[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)*|(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|"[^\\\x80-\xff\n\015"]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015"]*)*")[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037]*(?:(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)|"[^\\\x80-\xff\n\015"]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015"]*)*")[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037]*)*<[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:@[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:\.[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)*(?:,[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*@[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:\.[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)*)*:[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)?(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|"[^\\\x80-\xff\n\015"]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015"]*)*")[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:\.[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|"[^\\\x80-\xff\n\015"]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015"]*)*")[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)*@[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:\.[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*(?:[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff])|\[(?:[^\\\x80-\xff\n\015\[\]]|\\[^\x80-\xff])*\])[\040\t]*(?:\([^\\\x80-\xff\n\015()]*(?:(?:\\[^\x80-\xff]|\([^\\\x80-\xff\n\015()]*(?:\\[^\x80-\xff][^\\\x80-\xff\n\015()]*)*\))[^\\\x80-\xff\n\015()]*)*\)[\040\t]*)*)*>)$/) ) ? true : false;
}

/**
 * Validates a username.
 * @param string Username to test
 * @return bool
 */

function validateUsername(username)
{
  var regex = new RegExp('^[^<>&\?\'"%\n\r/]+$', '');
  return ( username.match(regex) ) ? true : false;
}

/*
 * Utility functions, moved from windows.js
 */

function getHeight() {
  var myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    myHeight = window.innerHeight;
  } else if( document.documentElement &&
      ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    myHeight = document.body.clientHeight;
  }
  return myHeight;
}

function getWidth() {
  var myWidth = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    myWidth = window.innerWidth;
  } else if( document.documentElement &&
      ( document.documentElement.clientWidth || document.documentElement.clientWidth ) ) {
    myWidth = document.documentElement.clientWidth;
  } else if( document.body && ( document.body.clientWidth || document.body.clientWidth ) ) {
    myWidth = document.body.clientWidth;
  }
  return myWidth;
}

/**
 * Sanitizes a page URL string so that it can safely be stored in the database.
 * @param string Page ID to sanitize
 * @return string Cleaned text
 */

function sanitize_page_id(page_id)
{
  // Remove character escapes
  page_id = dirtify_page_id(page_id);

  var regex = new RegExp('[A-Za-z0-9\\[\\]\./:;\(\)@_-]', 'g');
  pid_clean = page_id.replace(regex, 'X');
  var pid_dirty = [];
  for ( var i = 0; i < pid_clean.length; i++ )
    pid_dirty[i] = pid_clean.substr(i, 1);

  for ( var i = 0; i < pid_dirty.length; i++ )
  {
    var chr = pid_dirty[i];
    if ( chr == 'X' )
      continue;
    var cid = chr.charCodeAt(0);
    cid = cid.toString(16).toUpperCase();
    if ( cid.length < 2 )
    {
      cid = '0' + cid;
    }
    pid_dirty[i] = "." + cid;
  }
  
  var pid_chars = [];
  for ( var i = 0; i < page_id.length; i++ )
    pid_chars[i] = page_id.substr(i, 1);
  
  var page_id_cleaned = '';

  for ( var id in pid_chars )
  {
    var chr = pid_chars[id];
    if ( pid_dirty[id] == 'X' )
      page_id_cleaned += chr;
    else
      page_id_cleaned += pid_dirty[id];
  }
  
  return page_id_cleaned;
}

/**
 * Removes character escapes in a page ID string
 * @param string Page ID string to dirty up
 * @return string
 */

function dirtify_page_id(page_id)
{
  // First, replace spaces with underscores
  page_id = page_id.replace(/ /g, '_');

  var matches = page_id.match(/\.[A-Fa-f0-9][A-Fa-f0-9]/g);
  
  if ( matches != null )
  {
    for ( var i = 0; i < matches.length; i++ )
    {
      var match = matches[i];
      var byt = (match.substr(1)).toUpperCase();
      var code = eval("0x" + byt);
      var regex = new RegExp('\\.' + byt, 'g');
      page_id = page_id.replace(regex, String.fromCharCode(code));
    }
  }
  
  return page_id;
}

/**
 * Equivalent to PHP's in_array function.
 */

function in_array(needle, haystack)
{
  for(var i in haystack)
  {
    if(haystack[i] == needle) return i;
  }
  return false;
}

/**
 * Equivalent of PHP's time()
 * @return int
 */

function unix_time()
{
  return parseInt((new Date()).getTime()/1000);
}