plugins/admin/PageGroups.php
author Dan
Sat, 17 Jan 2009 11:51:17 -0500
changeset 318 eec2dfd2f0a3
parent 294 444c34a3886b
permissions -rw-r--r--
Rebrand as v1.0.6 (Roane)

<?php

/*
 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
 * Version 1.0.6 (Roane)
 * Copyright (C) 2006-2007 Dan Fuhry
 *
 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
 */

function page_Admin_PageGroups()
{
  global $db, $session, $paths, $template, $plugins; // Common objects
  if ( $session->auth_level < USER_LEVEL_ADMIN || $session->user_level < USER_LEVEL_ADMIN )
  {
    echo '<h3>Error: Not authenticated</h3><p>It looks like your administration session is invalid or you are not authorized to access this administration page. Please <a href="' . makeUrlNS('Special', 'Login/' . $paths->nslist['Special'] . 'Administration', 'level=' . USER_LEVEL_ADMIN, true) . '">re-authenticate</a> to continue.</p>';
    return;
  }
  
  if ( isset($_POST['action']) )
  {
    if ( isset($_POST['action']['create']) || isset($_POST['action']['create_stage2']) )
    {
      switch ( isset($_POST['action']['create_stage2']) )
      {
        case true:
          if ( empty($_POST['pg_name']) || empty($_POST['group_type']) )
          {
            echo '<div class="error-box">Please enter a name for the page group.</div>';
            return;
          }
          if ( $_POST['group_type'] == PAGE_GRP_TAGGED && empty($_POST['member_tag']) )
          {
            echo '<div class="error-box">Please enter a page tag.</div>';
            return;
          }
          if ( $_POST['group_type'] == PAGE_GRP_CATLINK && empty($_POST['member_cat']) )
          {
            echo '<div class="error-box">Please create a category page before linking a page group to a category.</div>';
            return;
          }
          if ( $_POST['group_type'] == PAGE_GRP_NORMAL && empty($_POST['member_page_0']) )
          {
            echo '<div class="error-box">Please specify at least one page to place in this group.</div>';
            return;
          }
          if ( $_POST['group_type'] == PAGE_GRP_REGEX && empty($_POST['regex']) )
          {
            echo '<div class="error-box">Please specify a regular expression to match page IDs against.</div>';
            return;
          }
          if ( $_POST['group_type'] != PAGE_GRP_TAGGED && $_POST['group_type'] != PAGE_GRP_CATLINK && $_POST['group_type'] != PAGE_GRP_NORMAL && $_POST['group_type'] != PAGE_GRP_REGEX )
          {
            echo '<div class="error-box">Umm, you sent an invalid group type. I\'d put a real error message here but this will only be shown if you try to hack the system.</div>';
            return;
          }
          // All checks passed, create the group
          switch($_POST['group_type'])
          {
            case PAGE_GRP_TAGGED:
              $name = $db->escape($_POST['pg_name']);
              $tag  = $db->escape($_POST['member_tag']);
              $sql = 'INSERT INTO '.table_prefix.'page_groups(pg_type,pg_name,pg_target) VALUES(' . PAGE_GRP_TAGGED . ', \'' . $name . '\', \'' . $tag . '\');';
              $q = $db->sql_query($sql);
              if ( !$q )
                $db->_die();
              break;
            case PAGE_GRP_CATLINK:
              $name = $db->escape($_POST['pg_name']);
              $cat  = $db->escape($_POST['member_cat']);
              $sql = 'INSERT INTO '.table_prefix.'page_groups(pg_type,pg_name,pg_target) VALUES(' . PAGE_GRP_CATLINK . ', \'' . $name . '\', \'' . $cat . '\');';
              $q = $db->sql_query($sql);
              if ( !$q )
                $db->_die();
              break;
            case PAGE_GRP_NORMAL:
              $name = $db->escape($_POST['pg_name']);
              $sql = 'INSERT INTO '.table_prefix.'page_groups(pg_type,pg_name) VALUES(' . PAGE_GRP_NORMAL . ', \'' . $name . '\');';
              $q = $db->sql_query($sql);
              if ( !$q )
                $db->_die();
              
              $ins_id = $db->insert_id();
              
              // Page list
              $keys = array_keys($_POST);
              $arr_pages = array();
              foreach ( $keys as $val )
              {
                if ( preg_match('/^member_page_([0-9]+?)$/', $val) && !empty($_POST[$val]) && isPage($_POST[$val]) )
                {
                  $arr_pages[] = $_POST[$val];
                }
              }
              $arr_sql = array();
              foreach ( $arr_pages as $page )
              {
                list($id, $ns) = RenderMan::strToPageID($page);
                $id = sanitize_page_id($id);
                $arr_sql[] = '(' . $ins_id . ',\'' . $db->escape($id) . '\', \'' . $ns . '\')';
              }
              $sql = 'INSERT INTO '.table_prefix.'page_group_members(pg_id,page_id,namespace) VALUES' . implode(',', $arr_sql) . ';';
              $q = $db->sql_query($sql);
              if ( !$q )
                $db->_die();
              break;
            case PAGE_GRP_REGEX:
              $name  = $db->escape($_POST['pg_name']);
              $regex = $db->escape($_POST['regex']);
              $sql = 'INSERT INTO '.table_prefix.'page_groups(pg_type,pg_name,pg_target) VALUES(' . PAGE_GRP_REGEX . ', \'' . $name . '\', \'' . $regex . '\');';
              $q = $db->sql_query($sql);
              if ( !$q )
                $db->_die();
              break;
          }
          echo '<div class="info-box">The page group "' . htmlspecialchars($_POST['pg_name']) . '" has been created.</div>';
          break;
      }
      // A little Javascript magic
      ?>
      <script language="javascript" type="text/javascript">
        function pg_create_typeset(selector)
        {
          var pg_normal  = <?php echo PAGE_GRP_NORMAL; ?>;
          var pg_tagged  = <?php echo PAGE_GRP_TAGGED; ?>;
          var pg_catlink = <?php echo PAGE_GRP_CATLINK; ?>;
          var pg_regex   = <?php echo PAGE_GRP_REGEX; ?>;
          var selection = false;
          // Get selection
          for ( var i = 0; i < selector.childNodes.length; i++ )
          {
            var child = selector.childNodes[i];
            if ( !child || child.tagName != 'OPTION' )
            {
              continue;
            }
            if ( child.selected )
            {
              selection = child.value;
            }
          }
          if ( !selection )
          {
            alert('Cannot get field value');
            return true;
          }
          selection = parseInt(selection);
          if ( selection != pg_normal && selection != pg_tagged && selection != pg_catlink && selection != pg_regex )
          {
            alert('Invalid field value');
            return true;
          }
          
          // We have the selection and it's validated; show the appropriate field group
          
          if ( selection == pg_normal )
          {
            document.getElementById('pg_create_title_catlink').style.display = 'none';
            document.getElementById('pg_create_catlink_1').style.display = 'none';
            document.getElementById('pg_create_catlink_2').style.display = 'none';
            
            document.getElementById('pg_create_title_tagged').style.display = 'none';
            document.getElementById('pg_create_tagged_1').style.display = 'none';
            document.getElementById('pg_create_tagged_2').style.display = 'none';
            
            document.getElementById('pg_create_title_normal').style.display = 'inline';
            document.getElementById('pg_create_normal_1').style.display = 'block';
            document.getElementById('pg_create_normal_2').style.display = 'block';
            
            document.getElementById('pg_create_title_regex').style.display = 'none';
            document.getElementById('pg_create_regex_1').style.display = 'none';
            document.getElementById('pg_create_regex_2').style.display = 'none';
          }
          else if ( selection == pg_catlink )
          {
            document.getElementById('pg_create_title_catlink').style.display = 'inline';
            document.getElementById('pg_create_catlink_1').style.display = 'block';
            document.getElementById('pg_create_catlink_2').style.display = 'block';
            
            document.getElementById('pg_create_title_tagged').style.display = 'none';
            document.getElementById('pg_create_tagged_1').style.display = 'none';
            document.getElementById('pg_create_tagged_2').style.display = 'none';
            
            document.getElementById('pg_create_title_normal').style.display = 'none';
            document.getElementById('pg_create_normal_1').style.display = 'none';
            document.getElementById('pg_create_normal_2').style.display = 'none';
            
            document.getElementById('pg_create_title_regex').style.display = 'none';
            document.getElementById('pg_create_regex_1').style.display = 'none';
            document.getElementById('pg_create_regex_2').style.display = 'none';
          }
          else if ( selection == pg_tagged )
          {
            document.getElementById('pg_create_title_catlink').style.display = 'none';
            document.getElementById('pg_create_catlink_1').style.display = 'none';
            document.getElementById('pg_create_catlink_2').style.display = 'none';
            
            document.getElementById('pg_create_title_tagged').style.display = 'inline';
            document.getElementById('pg_create_tagged_1').style.display = 'block';
            document.getElementById('pg_create_tagged_2').style.display = 'block';
            
            document.getElementById('pg_create_title_normal').style.display = 'none';
            document.getElementById('pg_create_normal_1').style.display = 'none';
            document.getElementById('pg_create_normal_2').style.display = 'none';
            
            document.getElementById('pg_create_title_regex').style.display = 'none';
            document.getElementById('pg_create_regex_1').style.display = 'none';
            document.getElementById('pg_create_regex_2').style.display = 'none';
          }
          else if ( selection == pg_regex )
          {
            document.getElementById('pg_create_title_catlink').style.display = 'none';
            document.getElementById('pg_create_catlink_1').style.display = 'none';
            document.getElementById('pg_create_catlink_2').style.display = 'none';
            
            document.getElementById('pg_create_title_tagged').style.display = 'none';
            document.getElementById('pg_create_tagged_1').style.display = 'none';
            document.getElementById('pg_create_tagged_2').style.display = 'none';
            
            document.getElementById('pg_create_title_normal').style.display = 'none';
            document.getElementById('pg_create_normal_1').style.display = 'none';
            document.getElementById('pg_create_normal_2').style.display = 'none';
            
            document.getElementById('pg_create_title_regex').style.display = 'inline';
            document.getElementById('pg_create_regex_1').style.display = 'block';
            document.getElementById('pg_create_regex_2').style.display = 'block';
          }
        
        }
        
        // Set to pg_normal on page load
        var pg_createform_init = function()
        {
          document.getElementById('pg_create_title_catlink').style.display = 'none';
          document.getElementById('pg_create_catlink_1').style.display = 'none';
          document.getElementById('pg_create_catlink_2').style.display = 'none';
          
          document.getElementById('pg_create_title_tagged').style.display = 'none';
          document.getElementById('pg_create_tagged_1').style.display = 'none';
          document.getElementById('pg_create_tagged_2').style.display = 'none';
          
          document.getElementById('pg_create_title_regex').style.display = 'none';
          document.getElementById('pg_create_regex_1').style.display = 'none';
          document.getElementById('pg_create_regex_2').style.display = 'none';
          
          document.getElementById('pg_create_title_normal').style.display = 'inline';
          document.getElementById('pg_create_normal_1').style.display = 'block';
          document.getElementById('pg_create_normal_2').style.display = 'block';
        }
        
        addOnloadHook(pg_createform_init);
        
        function pg_create_more_fields()
        {
          var targettd = document.getElementById('pg_create_normal_2');
          var id = 0;
          for ( var i = 0; i < targettd.childNodes.length; i++ )
          {
            var child = targettd.childNodes[i];
            if ( child.tagName == 'INPUT' )
            {
              if ( child.type == 'button' )
              {
                var newInp = document.createElement('input');
                // <input type="text" name="member_page_1" id="pg_create_member_1" onkeyup="return ajaxPageNameComplete(this);" size="30" /><br />
                newInp.type    = 'text';
                newInp.name    = 'member_page_' + id;
                newInp.id      = 'pg_create_member_' + id;
                newInp.onkeyup = function(e) { return ajaxPageNameComplete(this); };
                newInp.size    = '30';
                newInp.style.marginTop = '3px';
                targettd.insertBefore(newInp, child);
                targettd.insertBefore(document.createElement('br'), child);
                break;
              }
              else // if ( child.type == 'text' )
              {
                id++;
              }
            }
          }
        }
        
      </script>
      <?php
      
      // Build category list
      $q = $db->sql_query('SELECT name,urlname FROM '.table_prefix.'pages WHERE namespace=\'Category\';');
      if ( !$q )
        $db->_die();
      
      if ( $db->numrows() < 1 )
      {
        $catlist = 'There aren\'t any categories on this site.';
      }
      else
      {
        $catlist = '<select name="member_cat">';
        while ( $row = $db->fetchrow() )
        {
          $catlist .= '<option value="' . htmlspecialchars($row['urlname']) . '">' . htmlspecialchars($row['name']) . '</option>';
        }
        $catlist .= '</select>';
      }
      
      echo '<script type="text/javascript">
              var __pg_edit_submitAuthorized = true;
            </script>';
      
      echo '<form action="'.makeUrl($paths->nslist['Special'].'Administration', 'module='.$paths->cpage['module']).'" method="post" onsubmit="if(!submitAuthorized || !__pg_edit_submitAuthorized) return false;" enctype="multipart/form-data">';
      
      echo '<div class="tblholder">
            <table border="0" cellspacing="1" cellpadding="4">
              <tr>
              <th colspan="2">Create page group</th>
              </tr>';
      
      // Name
      echo '<tr>
              <td class="row2">
              Group name:<br />
              <small>This should be short, descriptive, and human-readable.</small>
              </td>
              <td class="row1">
              <input type="text" name="pg_name" size="30" />
              </td>
            </tr>';
            
      // Group type
      echo '<tr>
              <td class="row2">
              Group type:
              </td>
              <td class="row1">
              <select name="group_type" onchange="pg_create_typeset(this);">
                <option value="' . PAGE_GRP_NORMAL  . '" selected="selected">Static group of pages</option>
                <option value="' . PAGE_GRP_TAGGED  . '">Group of pages with one tag</option>
                <option value="' . PAGE_GRP_CATLINK . '">Link to category</option>
                <option value="' . PAGE_GRP_REGEX   . '">Perl-compatible regular expression (advanced)</option>
              </select>
              </td>
            </tr>';
            
      // Titles
      echo '<tr>
              <th colspan="2">
                <span id="pg_create_title_normal">
                  Static group of pages
                </span>
                <span id="pg_create_title_tagged">
                  Group of commonly tagged pages
                </span>
                <span id="pg_create_title_catlink">
                  Mirror a category
                </span>
                <span id="pg_create_title_regex">
                  Filter through a regular expression
                </span>
              </th>
            </tr>';
      
      echo '<tr>
              <td class="row2">
                <div id="pg_create_normal_1">
                  Member pages:<br />
                  <small>Click the "plus" button to add more fields.</small>
                </div>
                <div id="pg_create_catlink_1">
                  Include pages in this category:<br />
                  <small>Pages in subcategories are <u>not</u> included, however subcategory pages themselves are.</small>
                </div>
                <div id="pg_create_tagged_1">
                  Include pages with this tag:
                </div>
                <div id="pg_create_regex_1">
                  Regular expression:<br />
                  <small>Be sure to include the starting and ending delimiters and any flags you might need.<br />
                         These pages might help: <a href="http://us.php.net/manual/en/reference.pcre.pattern.modifiers.php">Pattern modifiers</a> &bull;
                         <a href="http://us.php.net/manual/en/reference.pcre.pattern.syntax.php">Pattern syntax</a><br />
                         Examples: <tt>/^(Special|Admin):/i</tt> &bull; <tt>/^Image:([0-9]+)$/</tt><br />
                         Developers, remember that this will be matched against the full page identifier string. This means that <tt>/^About_Enano$/</tt>
                         will NOT match the page Special:About_Enano.</small>
              </td>';
            
      echo '  <td class="row1">
                <div id="pg_create_normal_2" />
                  <input type="text" style="margin-top: 3px;" name="member_page_0" id="pg_create_member_0" onkeyup="return ajaxPageNameComplete(this);" size="30" /><br />
                  <input type="text" style="margin-top: 3px;" name="member_page_1" id="pg_create_member_1" onkeyup="return ajaxPageNameComplete(this);" size="30" /><br />
                  <input type="text" style="margin-top: 3px;" name="member_page_2" id="pg_create_member_2" onkeyup="return ajaxPageNameComplete(this);" size="30" /><br />
                  <input type="text" style="margin-top: 3px;" name="member_page_3" id="pg_create_member_3" onkeyup="return ajaxPageNameComplete(this);" size="30" /><br />
                  <input type="text" style="margin-top: 3px;" name="member_page_4" id="pg_create_member_4" onkeyup="return ajaxPageNameComplete(this);" size="30" /><br />
                  <input type="button" onclick="pg_create_more_fields(); return false;" style="margin-top: 5px;" value="&nbsp;&nbsp;+&nbsp;&nbsp;" />
                </div>
                <div id="pg_create_tagged_2">
                  <input type="text" name="member_tag" size="30" />
                </div>
                <div id="pg_create_catlink_2">
                  ' . $catlist . '
                </div>
                <div id="pg_create_regex_2">
                  <input type="text" name="regex" size="60" /> 
                </div>
              </td>
            </tr>';
            
      // Submit button
      echo '<tr>
              <th class="subhead" colspan="2"><input type="submit" name="action[create_stage2]" value="Create page group" style="font-weight: bold;" /> <input type="submit" name="action[noop]" value="Cancel" style="font-weight: normal;" /></th>
            </tr>';
            
      echo '</table>
            </div>';
      
      echo '</form>';
      return;
    }
    else if ( isset($_POST['action']['del']) )
    {
      // Confirmation to delete a group (this is really only a stub)
      
      $delete_id = array_keys($_POST['action']['del']);
      $delete_id = intval($delete_id[0]);
      
      if ( !empty($delete_id) )
      {
        echo '<form action="'.makeUrl($paths->nslist['Special'].'Administration', 'module='.$paths->cpage['module']).'" method="post" onsubmit="if(!submitAuthorized) return false;" enctype="multipart/form-data">';
        echo '<input type="hidden" name="delete_id" value="' . $delete_id . '" />';
        echo '<div class="tblholder">';
        echo '  <table border="0" cellspacing="1" cellpadding="4">';
        echo '    <tr><th>Confirm deletion</th></tr>';
        echo '    <tr><td class="row2" style="text-align: center; padding: 20px 0;">Are you sure you want to delete this page group?</td></tr>';
        echo '    <tr><td class="row1" style="text-align: center;">';
        echo '        <input type="submit" name="action[del_confirm]" value="Yes, delete group" style="font-weight: bold;" />';
        echo '        <input type="submit" name="action[noop]" value="Cancel" style="font-weight: normal;" />';
        echo '        </td></tr>';
        echo '  </table>';
        echo '</form>';
        
        return;
      }
    }
    else if ( isset($_POST['action']['del_confirm']) )
    {
      $delete_id = intval($_POST['delete_id']);
      if ( empty($delete_id) )
      {
        echo 'Hack attempt';
        return;
      }
      // Obtain group name
      $q = $db->sql_query('SELECT pg_name FROM '.table_prefix.'page_groups WHERE pg_id=' . $delete_id . ';');
      if ( !$q )
        $db->_die();
      if ( $db->numrows() < 1 )
      {
        echo 'Page group dun exist.';
        return;
      }
      $row = $db->fetchrow();
      $db->free_result();
      $pg_name = $row['pg_name'];
      unset($row);
      // Delete the group
      $q = $db->sql_query('DELETE FROM '.table_prefix.'page_groups WHERE pg_id=' . $delete_id . ';');
      if ( !$q )
        $db->_die();
      $q = $db->sql_query('DELETE FROM '.table_prefix.'page_group_members WHERE pg_id=' . $delete_id . ';');
      if ( !$q )
        $db->_die();
      echo "<div class='info-box'>The group ".'"'.htmlspecialchars("$pg_name").'"'." has been deleted.</div>";
    }
    else if ( isset($_POST['action']['edit']) && !isset($_POST['action']['noop']) )
    {
      if ( isset($_POST['action']['edit_save']) )
      {
      }
     
      if ( isset($_POST['action']['edit']['add_page']) && isset($_GET['src']) && $_GET['src'] == 'ajax' )
      {
        $json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
        $return = array('successful' => false);
        
        //
        // Add the specified page to the group
        //
        
        // Get ID of the group
        $edit_id = intval($_POST['pg_id']);
        if ( !$edit_id )
        {
          $return = array('mode' => 'error', 'text' => 'Hack attempt');
          echo $json->encode($return);
          return;
        }
        
        // Run some validation - check that page exists and that it's not already in the group
        $page = $_POST['new_page'];
        if ( empty($page) )
        {
          $return = array('mode' => 'error', 'text' => 'Please enter a page title.');
          echo $json->encode($return);
          return;
        }
        
        /*
        // We're gonna allow adding nonexistent pages for now
        if ( !isPage($page) )
        {
          $return = array('mode' => 'error', 'text' => 'The page you are trying to add (' . htmlspecialchars($page) . ') does not exist.');
          echo $json->encode($return);
          return;
        }
        */
        
        list($page_id, $namespace) = RenderMan::strToPageID($page);
        $page_id = sanitize_page_id($page_id);
        
        if ( !isset($paths->namespace[$namespace]) )
        {
          $return = array('mode' => 'error', 'text' => 'Invalid namespace return from RenderMan::strToPageID()');
          echo $json->encode($return);
          return;
        }
        
        $q = $db->sql_query('SELECT "x" FROM '.table_prefix.'page_group_members WHERE pg_id=' . $edit_id . ' AND page_id=\'' . $db->escape($page_id) . '\' AND namespace=\'' . $namespace . '\';');
        if ( !$q )
        {
          $return = array('mode' => 'error', 'text' => $db->get_error());
          echo $json->encode($return);
          return;
        }
        if ( $db->numrows() > 0 )
        {
          $return = array('mode' => 'error', 'text' => 'The page you are trying to add is already in this group.');
          echo $json->encode($return);
          return;
        }
        
        $q = $db->sql_query('INSERT INTO '.table_prefix.'page_group_members(pg_id, page_id, namespace) VALUES(' . $edit_id . ', \'' . $db->escape($page_id) . '\', \'' . $namespace . '\');');
        if ( !$q )
        {
          $return = array('mode' => 'error', 'text' => $db->get_error());
          echo $json->encode($return);
          return;
        }
        
        $title = "($namespace) " . get_page_title($paths->nslist[$namespace] . $page_id);
        
        $return = array('mode' => 'info', 'text' => 'The page has been added to the specified group.', 'successful' => true, 'title' => $title, 'member_id' => $db->insert_id());
        
        echo $json->encode($return);
        return;
      }
      
      if ( isset($_POST['action']['edit_save']) && isset($_POST['pg_name']) )
      {
        $edit_id = $_POST['action']['edit'];
        $edit_id = intval($edit_id);
        if ( !empty($edit_id) )
        {
          // Update group name
          $new_name = $_POST['pg_name'];
          if ( empty($new_name) )
          {
            echo '<div class="error-box">Please enter a valid name for this group.</div>';
          }
          else
          {
            $q = $db->sql_query('SELECT pg_name FROM '.table_prefix.'page_groups WHERE pg_id=' . $edit_id . ';');
            if ( !$q )
              $db->_die();
            $row = $db->fetchrow();
            $db->free_result();
            if ( $new_name != $row['pg_name'] )
            {
              $new_name = $db->escape(trim($new_name));
              $q = $db->sql_query('UPDATE '.table_prefix.'page_groups SET pg_name=\'' . $new_name . '\' WHERE pg_id=' . $edit_id . ';');
              if ( !$q )
                $db->_die();
              else
                echo '<div class="info-box">The group name was updated successfully.</div>';
            }
            if ( $_POST['pg_type'] == PAGE_GRP_TAGGED )
            {
              $target = $_POST['pg_target'];
              $target = sanitize_tag($target);
              if ( empty($target) )
              {
                echo '<div class="error-box">Please enter a valid tag.</div>';
              }
              else
              {
                $target = $db->escape($target);
                $q = $db->sql_query('UPDATE '.table_prefix.'page_groups SET pg_target=\'' . $target . '\' WHERE pg_id=' . $edit_id . ';');
                if ( !$q )
                  $db->_die();
                else
                  echo '<div class="info-box">The affecting tag was updated.</div>';
              }
            }
            else if ( $_POST['pg_type'] == PAGE_GRP_REGEX )
            {
              $target = $_POST['pg_target'];
              if ( empty($target) )
              {
                echo '<div class="error-box">Please enter an expression to match against..</div>';
              }
              else
              {
                $target = $db->escape($target);
                $q = $db->sql_query('UPDATE '.table_prefix.'page_groups SET pg_target=\'' . $target . '\' WHERE pg_id=' . $edit_id . ';');
                if ( !$q )
                  $db->_die();
                else
                  echo '<div class="info-box">The expression to match against was updated.</div>';
              }
            }
            else if ( $_POST['pg_type'] == PAGE_GRP_CATLINK )
            {
              $target = $_POST['pg_target'];
              if ( empty($target) )
              {
                echo '<div class="error-box">No category ID specified on POST URI.</div>';
              }
              else
              {
                $target = $db->escape($target);
                $q = $db->sql_query('UPDATE '.table_prefix.'page_groups SET pg_target=\'' . $target . '\' WHERE pg_id=' . $edit_id . ';');
                if ( !$q )
                  $db->_die();
                else
                  echo '<div class="info-box">The affecting category was updated.</div>';
              }
            }
          }
        }
      }
      else if ( isset($_POST['action']['edit_save']) )
      {
        $edit_id = $_POST['action']['edit'];
        $edit_id = intval($edit_id);
      }
      else
      {
        $edit_id = array_keys($_POST['action']['edit']);
        $edit_id = intval($edit_id[0]);
      }
      
      if ( empty($edit_id) )
      {
        echo 'Hack attempt';
        return;
      }
      
      if ( isset($_POST['action']['edit_save']['do_rm']) && !isset($_POST['pg_name']) )
      {
        $vals = array_keys($_POST['action']['edit_save']['rm']);
        $good = array();
        foreach ( $vals as $id )
        {
          if ( strval(intval($id)) == $id )
            $good[] = $id;
        }
        $subquery = ( count($good) > 0 ) ? 'pg_member_id=' . implode(' OR pg_member_id=', $good) : "'foo'='bar'";
        if ( $subquery == "'foo'='bar'" )
        {
          echo '<div class="warning-box">No pages were selected for deletion, and thus none were deleted.</div>';
        }
        else
        {
          $sql = 'DELETE FROM '.table_prefix."page_group_members WHERE ( $subquery ) AND pg_id=$edit_id;";
          if ( !$db->sql_query($sql) )
          {
            $db->_die();
          }
          echo '<div class="info-box">The requested page group members have been deleted.</div>';
        }
      }
      
      // Fetch information about page group
      $q = $db->sql_query('SELECT pg_name, pg_type, pg_target FROM '.table_prefix.'page_groups WHERE pg_id=' . $edit_id . ';');
      if ( !$q )
        $db->_die();
      
      if ( $db->numrows() < 1 )
      {
        echo 'Bad request - can\'t load page group from database.';
        return;
      }
      
      $row = $db->fetchrow();
      $db->free_result();
      
      echo '<form name="pg_edit_frm" action="'.makeUrl($paths->nslist['Special'].'Administration', 'module='.$paths->cpage['module']).'" method="post" onsubmit="if(!submitAuthorized) return false;" enctype="multipart/form-data">';
      echo '<input type="hidden" name="action[edit]" value="' . $edit_id . '" />';
      echo '<input type="hidden" name="pg_type" value="' . $row['pg_type'] . '" />';
      echo '<div class="tblholder">
              <table border="0" cellspacing="1" cellpadding="4">
                <tr>
                  <th colspan="3">Editing page group: ' . htmlspecialchars($row['pg_name']) . '</th>
                </tr>';
      // Group name
      
      echo '    <tr>
                  <td class="row2">Group name:</td>
                  <td class="row1" colspan="2"><input type="text" name="pg_name" value="' . htmlspecialchars($row['pg_name']) . '" size="30" /></td>
                </tr>';
      
      $ajax_page_add = false;
                
      // This is where the going gets tricky.
      // For static groups, we need to have each page listed out with a removal button, and a form to add new pages.
      // For category links, we need a select box with each category in it, and
      // For tag sets, just a text box to enter a new tag.
      
      // You can guess which one I dreaded.
      
      switch ( $row['pg_type'] )
      {
        case PAGE_GRP_NORMAL:
          
          // You have guessed correct.
          // *Sits in chair for 10 minutes listening to the radio in an effort to put off writing the code you see below*
          
          echo '<tr><th colspan="3" class="subhead"><input type="submit" name="action[edit_save]" value="Save group name" /></th></tr>';
          echo '</table></div>';
          echo '</form>';
          echo '<form name="pg_static_rm_frm" action="'.makeUrl($paths->nslist['Special'].'Administration', 'module='.$paths->cpage['module']).'" method="post" enctype="multipart/form-data">';
          echo '<input type="hidden" name="action[edit]" value="' . $edit_id . '" />';
          echo '<div class="tblholder">
                  <table border="0" cellspacing="1" cellpadding="4">
                    <tr>
                      <th colspan="3">Remove pages from this group</th>
                    </tr>';
          
          $q = $db->sql_query('SELECT m.pg_member_id,m.page_id,m.namespace FROM '.table_prefix.'page_group_members AS m
                                 LEFT JOIN '.table_prefix.'pages AS p
                                   ON ( p.urlname = m.page_id AND p.namespace = m.namespace )
                                 WHERE m.pg_id=' . $edit_id . ';');
          
          if ( !$q )
            $db->_die();
          
          $delim = ceil( $db->numrows() / 2 );
          if ( $delim < 5 )
          {
            $delim = 0xFFFFFFFE;
            // stupid hack
            $colspan = '2" id="pg_edit_tackon2me';
          }
          else
          {
            $colspan = "1";
          }
          
          echo '<tr><td class="row2" rowspan="2"><b>Remove</b> pages:</td><td class="row1" colspan="' . $colspan . '">';
          $i = 0;
          
          while ( $row = $db->fetchrow() )
          {
            $i++;
            if ( $i == $delim )
            {
              echo '</td><td class="row1" id="pg_edit_tackon2me">';
            }
            $page_name = '(' . $row['namespace'] . ') ' . get_page_title($paths->nslist[$row['namespace']] . $row['page_id']);
            echo '<label><input type="checkbox" name="action[edit_save][rm][' . $row['pg_member_id'] . ']" /> ' . htmlspecialchars($page_name) . '</label><br />';
          }
          
          echo '</td></tr>';
          echo '<tr><th colspan="2" class="subhead" style="width: 70%;"><input type="submit" name="action[edit_save][do_rm]" value="Remove selected" /></th></tr>';
          
          // More javascript magic!
          ?>
          <script type="text/javascript">
            var __pg_edit_submitAuthorized = true;
            var __ol_pg_edit_setup = function()
            {
              var input = document.getElementById('inptext_pg_add_member');
              input.onkeyup = function(e) { ajaxPageNameComplete(this); };
              input.onkeypress = function(e) { if ( e.keyCode == 13 ) { setTimeout('__pg_edit_ajaxadd(document.getElementById(\'' + this.id + '\'));', 500); } };
            }
            addOnloadHook(__ol_pg_edit_setup);
            var __pg_edit_objcache = false;
            function __pg_edit_ajaxadd(obj)
            {
              if ( __pg_edit_objcache )
                return false;
              __pg_edit_objcache = obj;
              
              if ( obj.nextSibling )
              {
                if ( obj.nextSibling.tagName == 'DIV' )
                {
                  obj.parentNode.removeChild(obj.nextSibling);
                }
              }
              
              // set width on parent, to prevent wrapping of ajax loading image
              var w = $(obj).Width();
              w = w + 24;
              obj.parentNode.style.width = w + 'px';
              
              // append the ajaxy loading image
              var img = document.createElement('img');
              img.src = scriptPath + '/images/loading.gif';
              img.style.marginLeft = '4px';
              insertAfter(obj.parentNode, img, obj);
              
              var url = makeUrlNS('Admin', 'PageGroups', 'src=ajax');
              var page_add = escape(obj.value);
              var pg_id = document.forms.pg_edit_frm['action[edit]'].value;
              ajaxPost(url, 'action[edit][add_page]=&pg_id=' + pg_id + '&new_page=' + page_add, function()
                {
                  if ( ajax.readyState == 4 )
                  {
                    var obj = __pg_edit_objcache;
                    __pg_edit_objcache = false;
                    
                    // kill the loading graphic
                    obj.parentNode.removeChild(obj.nextSibling);
                    
                    var resptext = String(ajax.responseText + '');
                    if ( resptext.substr(0, 1) != '{' )
                    {
                      // This ain't JSON baby.
                      alert('Invalid JSON response:\n' + resptext);
                      return false;
                    }
                    var json = parseJSON(resptext);
                    
                    var div = document.createElement('div');
                    if ( json.mode == 'info' )
                    {
                      div.className = 'info-box-mini';
                    }
                    else if ( json.mode == 'error' )
                    {
                      div.className = 'error-box-mini';
                    }
                    div.appendChild(document.createTextNode(json.text));
                    insertAfter(obj.parentNode, div, obj);
                    
                    if ( json.successful )
                    {
                      var td = document.getElementById('pg_edit_tackon2me');
                      var lbl = document.createElement('label');
                      var check = document.createElement('input');
                      check.type = 'checkbox';
                      check.name = 'action[edit_save][rm][' + json.member_id + ']';
                      lbl.appendChild(check);
                      lbl.appendChild(document.createTextNode(' ' + json.title));
                      td.appendChild(lbl);
                      td.appendChild(document.createElement('br'));
                    }
                    
                  }
                });
            }
          </script>
          <?php
          
          $ajax_page_add = true;
          
          break;
        case PAGE_GRP_TAGGED:
          echo '<tr>
                  <td class="row2">
                    Include pages with this tag:
                  </td>
                  <td class="row1">
                    <input type="text" name="pg_target" value="' . htmlspecialchars($row['pg_target']) . '" size="30" />
                  </td>
                </tr>';
          break;
        case PAGE_GRP_REGEX:
          echo '<tr>
                  <td class="row2">
                    Regular expression to use:<br />
                    <small>Be sure to include the starting and ending delimiters and any flags you might need.<br />
                           These pages might help: <a href="http://us.php.net/manual/en/reference.pcre.pattern.modifiers.php">Pattern modifiers</a> &bull;
                           <a href="http://us.php.net/manual/en/reference.pcre.pattern.syntax.php">Pattern syntax</a><br />
                           Examples: <tt>/^(Special|Admin):/i</tt> &bull; <tt>/^Image:([0-9]+)$/</tt><br />
                           Developers, remember that this will be matched against the full page identifier string. This means that <tt>/^About_Enano$/</tt>
                           will NOT match the page Special:About_Enano.</small>
                  </td>
                  <td class="row1">
                    <input type="text" name="pg_target" value="' . htmlspecialchars($row['pg_target']) . '" size="30" />
                  </td>
                </tr>';
          break;
        case PAGE_GRP_CATLINK:
          
          // Build category list
          $q = $db->sql_query('SELECT name,urlname FROM '.table_prefix.'pages WHERE namespace=\'Category\';');
          if ( !$q )
            $db->_die();
          
          if ( $db->numrows() < 1 )
          {
            $catlist = 'There aren\'t any categories on this site.';
          }
          else
          {
            $catlist = '<select name="pg_target">';
            while ( $catrow = $db->fetchrow() )
            {
              $selected = ( $catrow['urlname'] == $row['pg_target'] ) ? ' selected="selected"' : '';
              $catlist .= '<option value="' . htmlspecialchars($catrow['urlname']) . '"' . $selected . '>' . htmlspecialchars($catrow['name']) . '</option>';
            }
            $catlist .= '</select>';
          }
          
          echo '<tr>
                  <td class="row2">
                    Include pages that are in this category:<br />
                    <small><b>Reminder:</b> Enano does not automatically place any access controls on the category. If you
                           don\'t want users to be able to freely add and remove pages from the category (assuming Wiki Mode is enabled
                           for the category) then you need to enable protection on the category using the button on the more options menu.
                           </small>
                  </td>
                  <td class="row1">
                    ' . $catlist . '
                  </td>
                </tr>';
          
          break;
      }
      
      if ( $ajax_page_add )
      {
        echo '<tr><th colspan="3"><input type="submit" name="action[noop]" value="Cancel all changes" /></th></tr>';
      }
      else
      {
        echo '<tr><th colspan="3" class="subhead">
                <input type="submit" name="action[edit_save]" value="Save and update" />
                <input type="submit" name="action[noop]" value="Cancel all changes" />
              </th></tr>';
      }
      
      echo '  </table>
            </div>';
      echo '</form>';
      
      if ( $ajax_page_add )
      {
        // This needs to be outside of the form.
        echo '<div class="tblholder"><table border="0" cellspacing="1" cellpadding="4"><tr>';
        echo '<th colspan="2">On-the-fly tools</th></tr>';
        echo '<tr>';
        // Add pages AJAX form
        echo '<td class="row2">Add page:<br /><small>You can add multiple pages by entering part of a page title, and it will be auto-completed. Press Enter to quickly add the page. This only works if you a really up-to-date browser.</small></td>';
        echo '<td class="row1"><input type="text" size="30" name="pg_add_member" id="inptext_pg_add_member" /></td>';
        echo '</tr></table></div>';
      }
      
      return;
    }
    else if ( isset($_POST['action']['noop']) )
    {
      // Do nothing - skip to main form (noop is usually invoked by a cancel button in a form above)
    }
    else
    {
      echo '<div class="error-box">Invalid format of $_POST[action].</div>';
    }
  }
  // No action defined - show default menu
  
  echo '<h2>Manage page groups</h2>';
  echo '<p>Enano\'s page grouping system allows you to build sets of pages that can be controlled by a single ACL rule. This makes managing features such as a members-only section of your site a lot easier. If you don\'t use the ACL system, you probably don\'t need to use page groups.</p>';
  
  $q = $db->sql_query('SELECT pg_id, pg_type, pg_name, pg_target FROM '.table_prefix.'page_groups;');
  if ( !$q )
    $db->_die();

  echo '<form action="'.makeUrl($paths->nslist['Special'].'Administration', 'module='.$paths->cpage['module']).'" method="post" onsubmit="if(!submitAuthorized) return false;" enctype="multipart/form-data">';
  
  echo '<div class="tblholder">
          <table border="0" cellspacing="1" cellpadding="4">
            <tr>
              <th>Group name</th>
              <th>Type</th>
              <th>Target</th>
              <th colspan="2">Actions</th>
            </tr>';
  
  if ( $row = $db->fetchrow() )
  {
    do
    {
      $name = htmlspecialchars($row['pg_name']);
      $type = 'Invalid';
      switch ( $row['pg_type'] )
      {
        case PAGE_GRP_CATLINK:
          $type = 'Link to category';
          break;
        case PAGE_GRP_TAGGED:
          $type = 'Set of tagged pages';
          break;
        case PAGE_GRP_NORMAL:
          $type = 'Static set of pages';
          break;
        case PAGE_GRP_REGEX:
          $type = 'Regular expression match';
          break;
      }
      $target = '';
      if ( $row['pg_type'] == PAGE_GRP_TAGGED )
      {
        $target = 'Tag: ' . htmlspecialchars($row['pg_target']);
      }
      else if ( $row['pg_type'] == PAGE_GRP_CATLINK )
      {
        $target = 'Category: ' . htmlspecialchars(get_page_title($paths->nslist['Category'] . sanitize_page_id($row['pg_target'])));
      }
      else if ( $row['pg_type'] == PAGE_GRP_REGEX )
      {
        $target = 'Expression: <tt>' . htmlspecialchars($row['pg_target']) . '</tt>';
      }
      $btn_edit = '<input type="submit" name="action[edit][' . $row['pg_id'] . ']" value="Edit" />';
      $btn_del = '<input type="submit" name="action[del][' . $row['pg_id'] . ']" value="Delete" />';
      // stupid jEdit bug/hack
      $quot = '"';
      echo "<tr>
              <td class={$quot}row1{$quot}>$name</td>
              <td class={$quot}row2{$quot}>$type</td>
              <td class={$quot}row1{$quot}>$target</td>
              <td class={$quot}row3{$quot} style={$quot}text-align: center;{$quot}>$btn_edit</td>
              <td class={$quot}row3{$quot} style={$quot}text-align: center;{$quot}>$btn_del</td>
            </tr>";
    }
    while ( $row = $db->fetchrow() );
  }
  else
  {
    echo '  <tr><td class="row3" colspan="5" style="text-align: center;">No page groups defined.</td></tr>';
  }
  
  echo '    <tr>
              <th class="subhead" colspan="5">
                <input type="submit" name="action[create]" value="Create new group" />
              </th>
            </tr>';
  
  echo '  </table>
        </div>';
        
  echo '</form>';          
    
}

?>