// Javascript routines for the page editor

if ( document.getElementById('mdgCss') )
{
  var css_url = document.getElementById('mdgCss').href;
}
else
{
  var css_url = scriptPath + '/includes/clientside/css/enano_shared.css';
}

var do_popups = ( is_Safari ) ? '' : ',inlinepopups';
var _skin = ( typeof(tinymce_skin) == 'string' ) ? tinymce_skin : 'default';

var enano_tinymce_options = {
  mode : "none",
  plugins : 'table,save,safari,pagebreak,style,layer,advhr,insertdatetime,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras' + do_popups,
  theme : 'advanced',
  skin : _skin,
  theme_advanced_resize_horizontal : false,
  theme_advanced_resizing : true,
  theme_advanced_toolbar_location : "top",
  theme_advanced_toolbar_align : "left",
  theme_advanced_buttons1 : "save,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,|,forecolor,backcolor,|,formatselect,|,fontselect,fontsizeselect",
  theme_advanced_buttons3_add_before : "tablecontrols,separator",
  theme_advanced_buttons3_add_after : "|,fullscreen",
  theme_advanced_statusbar_location : 'bottom',
  noneditable_noneditable_class : 'mce_readonly',
  content_css : css_url
};

var initTinyMCE = function(e)
{
  if ( typeof(tinyMCE) == 'object' )
  {
    if ( !KILL_SWITCH && !DISABLE_MCE )
    {
      tinyMCE.init(enano_tinymce_options);
    }
  }
}
addOnloadHook(initTinyMCE);

var editor_open = false;

function ajaxEditor()
{
  if ( KILL_SWITCH )
    return true;
  if ( editor_open )
    return true;
  selectButtonMinor('edit');
  selectButtonMajor('article');
  setAjaxLoading();
  ajaxGet(stdAjaxPrefix + '&_mode=getsource', function()
    {
      if ( ajax.readyState == 4 )
      {
        unsetAjaxLoading();
        
        var response = String(ajax.responseText + '');
        if ( response.substr(0, 1) != '{' )
        {
          handle_invalid_json(response);
          return false;
        }
        
        response = parseJSON(response);
        if ( response.mode == 'error' )
        {
          unselectAllButtonsMinor();
          new messagebox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_server'), response.error);
          return false;
        }
        
        if ( !response.auth_view_source )
        {
          unselectAllButtonsMinor();
          new messagebox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_access_denied_title'), $lang.get('editor_err_access_denied_body'));
          return false;
        }
        
        // do we need to enter a captcha before saving the page?
        var captcha_hash = ( response.require_captcha ) ? response.captcha_id : false;
        
        ajaxBuildEditor(response.src, (!response.auth_edit), response.time, captcha_hash);
      }
    });
}

function ajaxBuildEditor(content, readonly, timestamp, captcha_hash)
{
  // Set flags
  // We don't want the fancy confirmation framework to trigger if the user is only viewing the page source
  if ( !readonly )
  {
    editor_open = true;
    disableUnload();
  }  
  
  // Destroy existing contents of page container
  var edcon = document.getElementById('ajaxEditContainer');
  for ( var i = edcon.childNodes.length - 1; i >= 0; i-- )
  {
    edcon.removeChild(edcon.childNodes[i]);
  }
  
  //
  // BUILD EDITOR
  //
  
  // Plaintext/wikitext toggler
  
  var toggler = document.createElement('p');
  toggler.style.marginLeft = '0';
  
  var span_wiki = document.createElement('span');
  var span_mce  = document.createElement('span');
  span_wiki.id  = 'enano_edit_btn_pt';
  span_mce.id   = 'enano_edit_btn_mce';
  if ( readCookie('enano_editor_mode') == 'tinymce' )
  {
    // Current selection is TinyMCE - make span_wiki have the link and span_mce be plaintext
    var a = document.createElement('a');
    a.href = '#';
    a.onclick = function() {
      ajaxSetEditorPlain();
      return false;
    };
    a.appendChild(document.createTextNode($lang.get('editor_btn_wikitext')));
    span_wiki.appendChild(a);
    toggler.appendChild(span_wiki);
    toggler.appendChild(document.createTextNode(' | '));
    span_mce.appendChild(document.createTextNode($lang.get('editor_btn_graphical')));
    toggler.appendChild(span_mce);
  }
  else
  {
    // Current selection is wikitext - set span_wiki to plaintext and span_mce to link
    span_wiki.appendChild(document.createTextNode($lang.get('editor_btn_wikitext')));
    toggler.appendChild(span_wiki);
    toggler.appendChild(document.createTextNode(' | '));
    var a = document.createElement('a');
    a.href = '#';
    a.onclick = function() {
      ajaxSetEditorMCE();
      return false;
    };
    a.appendChild(document.createTextNode($lang.get('editor_btn_graphical')));
    span_mce.appendChild(a);
    toggler.appendChild(span_mce);
  }
  
  // Form (to allow submits from MCE to trigger a real save)
  var form = document.createElement('form');
  form.action = 'javascript:void(0);';
  form.onsubmit = function()
  {
    ajaxEditorSave();
    return false;
  }
  
  // Preview holder
  var preview_anchor = document.createElement('a');
  preview_anchor.name = 'ajax_preview';
  preview_anchor.id = 'ajax_preview';
  var preview_container = document.createElement('div');
  preview_container.id = 'enano_editor_preview';
  
  // Textarea containing the content
  var ta_wrapper = document.createElement('div');
  ta_wrapper.style.margin = '10px 0';
  var textarea = document.createElement('textarea');
  textarea.value = content;
  textarea._edTimestamp = timestamp;
  textarea.id = 'ajaxEditArea';
  textarea.rows = '20';
  textarea.cols = '60';
  textarea.style.width = '98.7%';
  if ( readonly )
  {
    textarea.className = 'mce_readonly';
    textarea.setAttribute('readonly', 'readonly');
  }
  ta_wrapper.appendChild(textarea);
  
  // Revision metadata controls
  var tblholder = document.createElement('div');
  tblholder.className = 'tblholder';
  var metatable = document.createElement('table');
  metatable.setAttribute('border', '0');
  metatable.setAttribute('cellspacing', '1');
  metatable.setAttribute('cellpadding', '4');
  
  if ( readonly )
  {
    // Close Viewer button
    var tr3 = document.createElement('tr');
    var td3 = document.createElement('th');
    td3.setAttribute('colspan', '2');
    td3.className = 'subhead';
    
    var btn_cancel = document.createElement('input');
    btn_cancel.type = 'button';
    btn_cancel.value = $lang.get('editor_btn_closeviewer');
    btn_cancel.onclick = function() { ajaxReset(true); return false; };
    td3.appendChild(btn_cancel);
    tr3.appendChild(td3);
    
    metatable.appendChild(tr3);
  }
  else
  {
    // First row: edit summary
    var tr1 = document.createElement('tr');
    var td1_1 = document.createElement('td');
    var td1_2 = document.createElement('td');
    td1_1.className = 'row2';
    td1_2.className = 'row1';
    td1_2.style.width = '70%';
    td1_1.appendChild(document.createTextNode($lang.get('editor_lbl_edit_summary')));
    td1_1.appendChild(document.createElement('br'));
    var small = document.createElement('small');
    small.appendChild(document.createTextNode($lang.get('editor_lbl_edit_summary_explain')));
    td1_1.appendChild(small);
    
    var field_es = document.createElement('input');
    field_es.id = 'enano_editor_field_summary';
    field_es.type = 'text';
    field_es.size = '40';
    field_es.style.width = '96%';
    td1_2.appendChild(field_es);
    
    tr1.appendChild(td1_1);
    tr1.appendChild(td1_2);
    
    // Second row: minor edit
    var tr2 = document.createElement('tr');
    var td2_1 = document.createElement('td');
    var td2_2 = document.createElement('td');
    td2_1.className = 'row2';
    td2_2.className = 'row1';
    td2_1.appendChild(document.createTextNode($lang.get('editor_lbl_minor_edit')));
    td2_1.appendChild(document.createElement('br'));
    var small = document.createElement('small');
    small.appendChild(document.createTextNode($lang.get('editor_lbl_minor_edit_explain')));
    td2_1.appendChild(small);
    
    var label = document.createElement('label');
    var field_mi = document.createElement('input');
    field_mi.id = 'enano_editor_field_minor';
    field_mi.type = 'checkbox';
    label.appendChild(field_mi);
    label.appendChild(document.createTextNode(' '));
    label.appendChild(document.createTextNode($lang.get('editor_lbl_minor_edit_field')));
    td2_2.appendChild(label);
    
    tr2.appendChild(td2_1);
    tr2.appendChild(td2_2);
    
    if ( captcha_hash )
    {
      // generate captcha field (effectively third row)
      var tr4 = document.createElement('tr');
      var td4_1 = document.createElement('td');
      var td4_2 = document.createElement('td');
      td4_1.className = 'row2';
      td4_2.className = 'row1';
      
      td4_1.appendChild(document.createTextNode($lang.get('editor_lbl_field_captcha')));
      td4_1.appendChild(document.createElement('br'));
      var small2 = document.createElement('small');
      small2.appendChild(document.createTextNode($lang.get('editor_msg_captcha_pleaseenter')));
      small2.appendChild(document.createElement('br'));
      small2.appendChild(document.createElement('br'));
      small2.appendChild(document.createTextNode($lang.get('editor_msg_captcha_blind')));
      td4_1.appendChild(small2);
      
      var img = document.createElement('img');
      img.src = makeUrlNS('Special', 'Captcha/' + captcha_hash);
      img._captchaHash = captcha_hash;
      img.id = 'enano_editor_captcha_img';
      img.onclick = function()
      {
        this.src = makeUrlNS('Special', 'Captcha/' + this._captchaHash + '/' + Math.floor(Math.random() * 100000));
      }
      img.style.cursor = 'pointer';
      td4_2.appendChild(img);
      td4_2.appendChild(document.createElement('br'));
      td4_2.appendChild(document.createTextNode($lang.get('editor_lbl_field_captcha_code') + ' '));
      var input = document.createElement('input');
      input.type = 'text';
      input.id = 'enano_editor_field_captcha';
      input._captchaHash = captcha_hash;
      input.size = '9';
      td4_2.appendChild(input);
      
      tr4.appendChild(td4_1);
      tr4.appendChild(td4_2);
    }
    
    // Third row: controls
    var tr3 = document.createElement('tr');
    var td3 = document.createElement('th');
    td3.setAttribute('colspan', '2');
    td3.className = 'subhead';
    
    var btn_save = document.createElement('input');
    btn_save.type = 'button';
    btn_save.value = $lang.get('editor_btn_save');
    btn_save.onclick = function() { ajaxEditorSave(); return false; };
    td3.appendChild(btn_save);
    
    td3.appendChild(document.createTextNode(' '));
    
    var btn_preview = document.createElement('input');
    btn_preview.type = 'button';
    btn_preview.value = $lang.get('editor_btn_preview');
    btn_preview.onclick = function() { ajaxEditorGenPreview(); return false; };
    td3.appendChild(btn_preview);
    
    td3.appendChild(document.createTextNode(' '));
    
    var btn_revert = document.createElement('input');
    btn_revert.type = 'button';
    btn_revert.value = $lang.get('editor_btn_revert');
    btn_revert.onclick = function() { ajaxEditorRevertToLatest(); return false; };
    td3.appendChild(btn_revert);
    
    td3.appendChild(document.createTextNode(' '));
    
    var btn_diff = document.createElement('input');
    btn_diff.type = 'button';
    btn_diff.value = $lang.get('editor_btn_diff');
    btn_diff.onclick = function() { ajaxEditorShowDiffs(); return false; };
    td3.appendChild(btn_diff);
    
    td3.appendChild(document.createTextNode(' '));
    
    var btn_cancel = document.createElement('input');
    btn_cancel.type = 'button';
    btn_cancel.value = $lang.get('editor_btn_cancel');
    btn_cancel.onclick = function() { ajaxEditorCancel(); return false; };
    td3.appendChild(btn_cancel);
    tr3.appendChild(td3);
    
    metatable.appendChild(tr1);
    metatable.appendChild(tr2);
    if ( captcha_hash )
    {
      metatable.appendChild(tr4);
    }
    metatable.appendChild(tr3);
  }
  tblholder.appendChild(metatable);
  
  // Edit disclaimer/notice
  if ( editNotice ) // This is set globally in {JS_DYNAMIC_VARS}.
  {
    var en_div = document.createElement('div');
    en_div.innerHTML = editNotice;
    en_div.className = 'usermessage';
    en_div.style.margin = '10px 0 0 0';
  }
  
  // Put it all together...
  form.appendChild(toggler);
  form.appendChild(preview_anchor);
  form.appendChild(preview_container);
  form.appendChild(ta_wrapper);
  form.appendChild(tblholder);
  edcon.appendChild(form);
  
  if ( editNotice && !readonly )
  {
    edcon.appendChild(en_div);
  }
  
  // If the editor preference is tinymce, switch the editor to TinyMCE now
  if ( readCookie('enano_editor_mode') == 'tinymce' )
  {
    $dynano('ajaxEditArea').switchToMCE();
  }
}

function ajaxEditorSave()
{
  ajaxSetEditorLoading();
  var ta_content = $('ajaxEditArea').getContent();
  
  if ( ta_content == '' || ta_content == '<p></p>' || ta_content == '<p>&nbsp;</p>' )
  {
    new messagebox(MB_OK|MB_ICONSTOP, $lang.get('editor_err_no_text_title'), $lang.get('editor_err_no_text_body'));
    ajaxUnSetEditorLoading();
    return false;
  }
  
  var edit_summ = $('enano_editor_field_summary').object.value;
  if ( !edit_summ )
    edit_summ = '';
  var is_minor = ( $('enano_editor_field_minor').object.checked ) ? 1 : 0;
  var timestamp = $('ajaxEditArea').object._edTimestamp;
  
  var json_packet = {
    src: ta_content,
    summary: edit_summ,
    minor_edit: is_minor,
    time: timestamp
  };
  
  // Do we need to add captcha info?
  if ( document.getElementById('enano_editor_field_captcha') )
  {
    var captcha_field = document.getElementById('enano_editor_field_captcha');
    if ( captcha_field.value == '' )
    {
      new messagebox(MB_OK|MB_ICONSTOP, $lang.get('editor_err_need_captcha_title'), $lang.get('editor_err_need_captcha_body'));
      ajaxUnSetEditorLoading();
      return false;
    }
    json_packet.captcha_code = captcha_field.value;
    json_packet.captcha_id = captcha_field._captchaHash;
  }
  
  json_packet = ajaxEscape(toJSONString(json_packet));
  ajaxPost(stdAjaxPrefix + '&_mode=savepage_json', 'r=' + json_packet, function()
    {
      if ( ajax.readyState == 4 )
      {
        ajaxUnSetEditorLoading();
        var response = String(ajax.responseText + '');
        if ( response.substr(0, 1) != '{' )
        {
          handle_invalid_json(response);
          return false;
        }
        
        response = parseJSON(response);
        // This will only be used if there was a lower-level error.
        if ( response.mode == 'error' )
        {
          new messagebox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_server'), response.error);
          return false;
        }
        // This will be used if the PageProcessor generated errors (usually security/permissions related)
        if ( response.mode == 'errors' )
        {
          // This will be true if the user entered a captcha code incorrectly, thus
          // invalidating the code and requiring a new image to be generated.
          if ( response.new_captcha )
          {
            // Generate the new captcha field
            var img = document.getElementById('enano_editor_captcha_img');
            var input = document.getElementById('enano_editor_field_captcha');
            if ( img && input )
            {
              img._captchaHash = response.new_captcha;
              input._captchaHash = response.new_captcha;
              img.src = makeUrlNS('Special', 'Captcha/' + response.new_captcha);
              input.value = '';
            }
          }
          var errors = '<ul><li>' + implode('</li><li>', response.errors) + '</li></ul>';
          new messagebox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_save_title'), $lang.get('editor_err_save_body') + errors);
          return false;
        }
        // If someone else got to the page first, warn the user
        if ( response.mode == 'obsolete' )
        {
          // Update the local timestamp to allow override
          $('ajaxEditArea').object._edTimestamp = response.time;
          new messagebox(MB_OK | MB_ICONEXCLAMATION, $lang.get('editor_err_obsolete_title'), $lang.get('editor_err_obsolete_body', { author: response.author, timestamp: response.date_string, page_url: makeUrl(title, false, true) }));
          return false;
        }
        if ( response.mode == 'success' )
        {
          // The save was successful; reset flags and make another request for the new page content
          setAjaxLoading();
          editor_open = false;
          enableUnload();
          changeOpac(0, 'ajaxEditContainer');
          ajaxGet(stdAjaxPrefix + '&_mode=getpage&noheaders', function()
            {
              if ( ajax.readyState == 4 )
              {
                unsetAjaxLoading();
                selectButtonMajor('article');
                unselectAllButtonsMinor();
                
                document.getElementById('ajaxEditContainer').innerHTML = '<div class="usermessage">' + $lang.get('editor_msg_saved') + '</div>' + ajax.responseText;
                opacity('ajaxEditContainer', 0, 100, 1000);
              }
            });
        }
      }
    }, true);
  
}

function ajaxEditorGenPreview()
{
  ajaxSetEditorLoading();
  var ta_content = $('ajaxEditArea').getContent();
  ta_content = ajaxEscape(ta_content);
  if ( $('enano_editor_preview').object.innerHTML != '' )
  {
    opacity('enano_editor_preview', 100, 0, 500);
  }
  ajaxPost(stdAjaxPrefix + '&_mode=preview', 'text=' + ta_content, function()
    {
      if ( ajax.readyState == 4 )
      {
        ajaxUnSetEditorLoading();
        changeOpac(0, 'enano_editor_preview');
        $('enano_editor_preview').object.innerHTML = ajax.responseText;
        window.location.hash = '#ajax_preview';
        opacity('enano_editor_preview', 0, 100, 500);
      }
    }, true);
}

function ajaxEditorRevertToLatest()
{
  var mb = new messagebox(MB_YESNO | MB_ICONQUESTION, $lang.get('editor_msg_revert_confirm_title'), $lang.get('editor_msg_revert_confirm_body'));
  mb.onclick['Yes'] = function()
  {
    setTimeout('ajaxEditorRevertToLatestReal();', 750);
  }
}

function ajaxEditorRevertToLatestReal()
{
  ajaxSetEditorLoading();
  ajaxGet(stdAjaxPrefix + '&_mode=getsource', function()
    {
      if ( ajax.readyState == 4 )
      {
        ajaxUnSetEditorLoading();
        
        var response = String(ajax.responseText + '');
        if ( response.substr(0, 1) != '{' )
        {
          handle_invalid_json(response);
          return false;
        }
        
        response = parseJSON(response);
        if ( response.mode == 'error' )
        {
          unselectAllButtonsMinor();
          new messagebox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_server'), response.error);
          return false;
        }
        
        if ( !response.auth_view_source )
        {
          unselectAllButtonsMinor();
          new messagebox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_access_denied_title'), $lang.get('editor_err_access_denied_body'));
          return false;
        }
        
        var ed = tinyMCE.get('ajaxEditArea');
        if ( ed )
        {
          ed.setContent(response.src);
        }
        else
        {
          $('ajaxEditArea').object.value = response.src;
        }
      }
    }, true);
}

function ajaxEditorShowDiffs()
{
  ajaxSetEditorLoading();
  var ta_content = $('ajaxEditArea').getContent();
  ta_content = ajaxEscape(ta_content);
  if ( $('enano_editor_preview').object.innerHTML != '' )
  {
    opacity('enano_editor_preview', 100, 0, 500);
  }
  ajaxPost(stdAjaxPrefix + '&_mode=diff_cur', 'text=' + ta_content, function()
    {
      if ( ajax.readyState == 4 )
      {
        ajaxUnSetEditorLoading();
        changeOpac(0, 'enano_editor_preview');
        $('enano_editor_preview').object.innerHTML = ajax.responseText;
        window.location.hash = '#ajax_preview';
        opacity('enano_editor_preview', 0, 100, 500);
      }
    }, true);
}

function ajaxEditorCancel()
{
  var mb = new messagebox(MB_YESNO | MB_ICONQUESTION, $lang.get('editor_msg_cancel_confirm_title'), $lang.get('editor_msg_cancel_confirm_body'));
  mb.onclick['Yes'] = function()
  {
    setAjaxLoading();
    editor_open = false;
    enableUnload();
    setTimeout('ajaxReset();', 750);
  }
}

function ajaxSetEditorMCE()
{
  if ( editor_loading )
    return false;
  
  // Clear out existing buttons
  var span_wiki = $dynano('enano_edit_btn_pt').object;
  var span_mce  = $dynano('enano_edit_btn_mce').object;
  span_wiki.removeChild(span_wiki.firstChild);
  span_mce.removeChild(span_mce.firstChild);
  
  // Rebuild control
  var a = document.createElement('a');
  a.href = '#';
  a.onclick = function() {
    ajaxSetEditorPlain();
    return false;
  };
  a.appendChild(document.createTextNode($lang.get('editor_btn_wikitext')));
  span_wiki.appendChild(a);
  span_mce.appendChild(document.createTextNode($lang.get('editor_btn_graphical')));
  
  // Swap editor
  $dynano('ajaxEditArea').switchToMCE();
  
  // Remember the setting
  createCookie('enano_editor_mode', 'tinymce', 365);
}

function ajaxSetEditorPlain()
{
  if ( editor_loading )
    return false;
  
  // Clear out existing buttons
  var span_wiki = $dynano('enano_edit_btn_pt').object;
  var span_mce  = $dynano('enano_edit_btn_mce').object;
  span_wiki.removeChild(span_wiki.firstChild);
  span_mce.removeChild(span_mce.firstChild);
  
  // Rebuild control
  span_wiki.appendChild(document.createTextNode($lang.get('editor_btn_wikitext')));
  var a = document.createElement('a');
  a.href = '#';
  a.onclick = function() {
    ajaxSetEditorMCE();
    return false;
  };
  a.appendChild(document.createTextNode($lang.get('editor_btn_graphical')));
  span_mce.appendChild(a);
  
  // Swap editor
  $dynano('ajaxEditArea').destroyMCE();
  
  // Remember the setting
  createCookie('enano_editor_mode', 'text', 365);
}

var editor_loading = false;

function ajaxSetEditorLoading()
{
  var ed = tinyMCE.get('ajaxEditArea');
  editor_loading = true;
  if ( ed )
  {
    ed.setProgressState(1);
  }
  else
  {
    ed = document.getElementById('ajaxEditArea');
    var blackout = document.createElement('div');
    blackout.style.position = 'absolute';
    blackout.style.top = $('ajaxEditArea').Top() + 'px';
    blackout.style.left = $('ajaxEditArea').Left() + 'px';
    blackout.style.width = $('ajaxEditArea').Width() + 'px';
    blackout.style.height = $('ajaxEditArea').Height() + 'px';
    blackout.style.backgroundColor = '#FFFFFF';
    domObjChangeOpac(60, blackout);
    blackout.style.backgroundImage = 'url(' + scriptPath + '/includes/clientside/tinymce/themes/advanced/skins/default/img/progress.gif)';
    blackout.style.backgroundPosition = 'center center';
    blackout.style.backgroundRepeat = 'no-repeat';
    blackout.id = 'enano_editor_blackout';
    blackout.style.zIndex = getHighestZ() + 2;
    
    var body = document.getElementsByTagName('body')[0];
    body.appendChild(blackout);
  }
}

function ajaxUnSetEditorLoading()
{
  editor_loading = false;
  var ed = tinyMCE.get('ajaxEditArea');
  if ( ed )
  {
    ed.setProgressState(0);
  }
  else
  {
    var blackout = document.getElementById('enano_editor_blackout');
    var body = document.getElementsByTagName('body')[0];
    body.removeChild(blackout);
  }
}