// 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('>', '>');

  }

  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('&', '&');

    url = url.replace('<', '&lt;');

    url = url.replace('>', '>');

  }

  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)

{

  var match = url.match(/#(.*?)$/);

  url = url.replace(/#(.*?)$/, '');

  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;

  }

  if ( match )

  {

    url = url + match[0];

  }

  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();

    // destroy the MCE instance so it can be recreated later

    $dynano('ajaxEditArea').destroyMCE(false);

  }

  var ajax = ajaxMakeXHR();

  if ( !ajax )

  {

    console.error('ajaxMakeXHR() failed');

    return false;

  }

  ajax.onreadystatechange = function()

  {

    f(ajax);

  };

  ajax.open('GET', uri, true);

  ajax.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );

  ajax.send(null);

  window.ajax = ajax;

}

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();

    // destroy the MCE instance so it can be recreated later

    $dynano('ajaxEditArea').destroyMCE(false);

  }

  var ajax = ajaxMakeXHR();

  if ( !ajax )

  {

    console.error('ajaxMakeXHR() failed');

    return false;

  }

  ajax.onreadystatechange = function()

  {

    f(ajax);

  };

  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);

  window.ajax = ajax;

}

/**

 * 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', 'jquery', 'jquery-ui', 'fadefilter', 'flyin', 'l10n']);

  darken(aclDisableTransitionFX, 70, 'invalidjsondarkener');

  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, 'invalidjsondarkener');

      }

      else

      {

        $(parentdiv).hide("blind", {}, 1000, function()

          {

            parentdiv.parentNode.removeChild(parentdiv);

              enlighten(aclDisableTransitionFX, 'invalidjsondarkener');

          });

      }

    }

    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 ) - ( $dynano(box).Height() / 2 ) + getScrollOffset();

    var left = ( getWidth() / 2 ) - ( $dynano(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()

        {

          $(box).show("blind", {}, 1000);

        }, 1000);

    }

  return false;

}

/**

 * 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;

  }

}

/**

 * Return a DOMElement that uses a sprite image.

 * @param string Path to sprite image

 * @param int Width of resulting image

 * @param int Height of resulting image

 * @param int X offset

 * @param int Y offset

 * @return object HTMLImageElement

 */

function gen_sprite(path, width, height, xpos, ypos)

{

  var image = document.createElement('img');

  image.src = cdnPath + '/images/spacer.gif';

  image.width = String(width);

  image.height = String(height);

  image.style.backgroundImage = 'url(' + path + ')';

  image.style.backgroundRepeat = 'no-repeat';

  xpos = ( xpos == 0 ) ? '0' : '-' + String(xpos);

  ypos = ( ypos == 0 ) ? '0' : '-' + String(ypos);

  image.style.backgroundPosition = ypos + 'px ' + xpos + 'px';

  return image;

}

/**

 * The same as gen_sprite but generates HTML instead of a DOMElement.

 * @param string Path to sprite image

 * @param int Width of resulting image

 * @param int Height of resulting image

 * @param int X offset

 * @param int Y offset

 * @return object HTMLImageElement

 */

function gen_sprite_html(path, width, height, xpos, ypos)

{

  var html = '<img src="' + scriptPath + '/images/spacer.gif" width="' + width + '" height="' + height + '" ';

  xpos = ( xpos == 0 ) ? '0' : '-' + String(xpos);

  ypos = ( ypos == 0 ) ? '0' : '-' + String(ypos);

  html += 'style="background-image: url(' + path + '); background-repeat: no-repeat; background-position: ' + ypos + 'px ' + xpos + 'px;"';

  html += ' />';

  return html;

}

function findParentForm(o)

{

  return get_parent_form(o);

}

function domObjChangeOpac(opacity, id)

{