/*

 * AJAX applets

 */

function ajaxGet(uri, f) {

  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;

    }

  }

  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) {

  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;

    }

  }

  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)

{

  var mainwin = $('ajaxEditContainer').object;

  mainwin.innerHTML = '';

  // Title

  var h3 = document.createElement('h3');

  h3.appendChild(document.createTextNode('The site encountered an error while processing your request.'));

  mainwin.appendChild(h3);

  if ( typeof(customerror) == 'string' )

  {

    var el = document.createElement('p');

    el.appendChild(document.createTextNode(customerror));

    mainwin.appendChild(el);

  }

  else

  {

    customerror  = 'We unexpectedly received the following response from the server. The response should have been in the JSON ';

    customerror += 'serialization format, but the response wasn\'t composed only of the JSON response. There are three possible triggers';

    customerror += 'for this problem:';

    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');

    li1.appendChild(document.createTextNode('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.'));

    var osc_exception = ( window.location.hostname == 'demo.opensourcecms.com' ) ? ' This is KNOWN to be the case with the OpenSourceCMS.com demo version of Enano.' : '';

    li2.appendChild(document.createTextNode('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.' + osc_exception));

    li3.appendChild(document.createTextNode('It\'s possible that Enano triggered a PHP error or warning. In this case, you may be looking at a bug in Enano.'));

    ul.appendChild(li1);

    ul.appendChild(li2);

    ul.appendChild(li3);

    mainwin.appendChild(ul);

  }

  var p2 = document.createElement('p');

  p2.appendChild(document.createTextNode('The response received from the server is as follows:'));

  mainwin.appendChild(p2);

  var pre = document.createElement('pre');

  pre.appendChild(document.createTextNode(response));

  mainwin.appendChild(pre);

  var p3 = document.createElement('p');

  p3.appendChild(document.createTextNode('You may also choose to view the response as HTML. '));

  var a = document.createElement('a');

  a.appendChild(document.createTextNode('View as HTML...'));

  a._resp = response;

  a.id = 'invalidjson_link';

  a.onclick = function()

  {

    var mb = new messagebox(MB_YESNO | MB_ICONEXCLAMATION, 'Do you really want to view this response as HTML?', 'If the response was changed during transmission to include malicious code, you may be allowing that malicious code to run by viewing the response as HTML. Only do this if you have reviewed the response text and have found no suspicious code in it.');

    mb.onclick['Yes'] = function()

    {

      var html = $('invalidjson_link').object._resp;

      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(html);

    }

    return false;

  }

  a.href = '#';

  p3.appendChild(a);

  mainwin.appendChild(p3);

}

function ajaxEscape(text)

{

  /*

  text = escape(text);

  text = text.replace(/\+/g, '%2B', text);

  */

  text = window.encodeURIComponent(text);

  return text;

}

function ajaxAltEscape(text)

{

  text = escape(text);

  text = text.replace(/\+/g, '%2B', text);

  return text;

}

// Page editor

function ajaxEditor()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  setAjaxLoading();

  ajaxGet(stdAjaxPrefix+'&_mode=getsource', function() {

      if(ajax.readyState == 4) {

        unsetAjaxLoading();

        if(edit_open) {

          c=confirm('Do you really want to revert your changes?');

          if(!c) return;

        }

        edit_open = true;

        selectButtonMajor('article');

        selectButtonMinor('edit');

        if(in_array('ajaxEditArea', grippied_textareas))

        {

          // Allow the textarea grippifier to re-create the resizer control on the textarea

          grippied_textareas.pop(in_array('ajaxEditArea', grippied_textareas));

        }

        disableUnload('If you do, any changes that you have made to this page will be lost.');

        var switcher = ( readCookie('enano_editor_mode') == 'tinymce' ) ?

                        '<a href="#" onclick="setEditorText(); return false;">wikitext editor</a>  |  graphical editor' :

                        'wikitext editor  |  <a href="#" onclick="setEditorMCE(); return false;">graphical editor</a>' ;

        document.getElementById('ajaxEditContainer').innerHTML = '\

        <div id="mdgPreviewContainer"></div> \

        <span id="switcher">' + switcher + '</span><br />\

        <form name="mdgAjaxEditor" method="get" action="#" onsubmit="ajaxSavePage(); return false;">\

          Edit summary: <input id="ajaxEditSummary" size="40" /><br />\

          <input id="ajaxEditMinor" name="minor" type="checkbox" /> <label for="ajaxEditMinor">This is a minor edit</label><br />\

          <a href="#" onclick="void(ajaxSavePage()); return false;">save changes</a>  |  <a href="#" onclick="void(ajaxShowPreview()); return false;">preview changes</a>  |  <a href="#" onclick="void(ajaxEditor()); return false;">revert changes</a>  |  <a href="#" onclick="void(ajaxDiscard()); return false;">discard changes</a>\

          <br />\

          '+editNotice+'\

        </form>';

        // initTextareas();

        if(readCookie('enano_editor_mode') == 'tinymce')

        {

          $('ajaxEditArea').switchToMCE();

        }

      }

  });

}

function setEditorMCE()

{

  $('ajaxEditArea').switchToMCE();

  createCookie('enano_editor_mode', 'tinymce', 365);

  $('switcher').object.innerHTML = '<a href="#" onclick="setEditorText(); return false;">wikitext editor</a>  |  graphical editor';

}

function setEditorText()

{

  $('ajaxEditArea').destroyMCE();

  createCookie('enano_editor_mode', 'text', 365);

  $('switcher').object.innerHTML = 'wikitext editor  |  <a href="#" onclick="setEditorMCE(); return false;">graphical editor</a>';

}

function ajaxViewSource()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  setAjaxLoading();

  ajaxGet(stdAjaxPrefix+'&_mode=getsource', function() {

      if(ajax.readyState == 4) {

        unsetAjaxLoading();

        if(edit_open) {

          c=confirm('Do you really want to revert your changes?');

          if(!c) return;

        }

        edit_open = true;

        selectButtonMajor('article');

        selectButtonMinor('edit');

        if(in_array('ajaxEditArea', grippied_textareas))

        {

          // Allow the textarea grippifier to re-create the resizer control on the textarea

          grippied_textareas.pop(in_array('ajaxEditArea', grippied_textareas));

        }

        document.getElementById('ajaxEditContainer').innerHTML = '\

          <form method="get" action="#" onsubmit="ajaxSavePage(); return false;">\

            <textarea readonly="readonly" id="ajaxEditArea" rows="20" cols="60" style="display: block; margin: 1em 0 1em 1em; width: 96.5%;">'+ajax.responseText+'</textarea><br />\

            <a href="#" onclick="void(ajaxReset()); return false;">close viewer</a>\

          </form>';

        initTextareas();

      }

  });

}

function ajaxShowPreview()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  goBusy('Loading preview...');

  var text = ajaxEscape($('ajaxEditArea').getContent());

  if(document.mdgAjaxEditor.minor.checked) minor='&minor';

  else minor='';

  ajaxPost(stdAjaxPrefix+'&_mode=preview', 'summary='+document.getElementById('ajaxEditSummary').value+minor+'&text='+text, function() {

    if(ajax.readyState == 4) {

      unBusy();

      edit_open = false;

      document.getElementById('mdgPreviewContainer').innerHTML = ajax.responseText;

    }

  });

}

function ajaxSavePage()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  //goBusy('Saving page...');

  var text = ajaxEscape($('ajaxEditArea').getContent());

  if(document.mdgAjaxEditor.minor.checked) minor='&minor';

  else minor='';

  ajaxPost(stdAjaxPrefix+'&_mode=savepage', 'summary='+document.getElementById('ajaxEditSummary').value+minor+'&text='+text, function() {

    if(ajax.readyState == 4) {

      unBusy();

      edit_open = false;

      document.getElementById('ajaxEditContainer').innerHTML = ajax.responseText;

      enableUnload();

      unselectAllButtonsMinor();

    }

  });

}

function ajaxDiscard()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  c = confirm('Do you really want to discard your changes?');

  if(!c) return;

  ajaxReset();

}

function ajaxReset()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  enableUnload();

  setAjaxLoading();

  ajaxGet(stdAjaxPrefix+'&_mode=getpage&noheaders', function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      edit_open = false;

      document.getElementById('ajaxEditContainer').innerHTML = ajax.responseText;

      selectButtonMajor('article');

      unselectAllButtonsMinor();

    }

  });

}

// Miscellaneous AJAX applets

function ajaxProtect(l) {

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  if(shift) {

    r = 'NO_REASON';

  } else {

    r = prompt('Reason for (un)protecting:');

    if(!r || r=='') return;

  }

  setAjaxLoading();

  document.getElementById('protbtn_0').style.textDecoration = 'none';

  document.getElementById('protbtn_1').style.textDecoration = 'none';

  document.getElementById('protbtn_2').style.textDecoration = 'none';

  document.getElementById('protbtn_'+l).style.textDecoration = 'underline';

  ajaxPost(stdAjaxPrefix+'&_mode=protect', 'reason='+ajaxEscape(r)+'&level='+l, function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      if(ajax.responseText != 'good')

        alert(ajax.responseText);

    }

  });

}

function ajaxRename()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  r = prompt('What title should this page be renamed to?\nNote: This does not and will never change the URL of this page, that must be done from the admin panel.');

  if(!r || r=='') return;

  setAjaxLoading();

  ajaxPost(stdAjaxPrefix+'&_mode=rename', 'newtitle='+ajaxEscape(r), function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      alert(ajax.responseText);

    }

  });

}

function ajaxMakePage()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  setAjaxLoading();

  ajaxPost(ENANO_SPECIAL_CREATEPAGE, ENANO_CREATEPAGE_PARAMS, function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      window.location.reload();

    }

  });

}

function ajaxDeletePage()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  var reason = prompt('Please enter your reason for deleting this page.');

  if ( !reason || reason == '' )

  {

    return false;

  }

  c = confirm('You are about to REVERSIBLY delete this page. Do you REALLY want to do this?\n\n(Comments and categorization data, as well as any attached files, will be permanently lost)');

  if(!c)

  {

    return;

  }

  setAjaxLoading();

  ajaxPost(stdAjaxPrefix+'&_mode=deletepage', 'reason=' + ajaxEscape(reason), function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      alert(ajax.responseText);

      window.location.reload();                                                                           

    }

  });

}

function ajaxDelVote()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  c = confirm('Are you sure that you want to vote that this page be deleted?');

  if(!c) return;

  setAjaxLoading();

  ajaxGet(stdAjaxPrefix+'&_mode=delvote', function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      alert(ajax.responseText);

    }

  });

}

function ajaxResetDelVotes()

{

  // IE <6 pseudo-compatibility

  if ( KILL_SWITCH )

    return true;

  c = confirm('This will reset the number of votes against this page to zero. Do you really want to do this?');

  if(!c) return;

  setAjaxLoading();

  ajaxGet(stdAjaxPrefix+'&_mode=resetdelvotes', function() {

    if(ajax.readyState == 4) {

      unsetAjaxLoading();

      alert(ajax.responseText);

      item = document.getElementById('mdgDeleteVoteNoticeBox');

      if(item)