includes/namespaces/default.php
author Dan
Wed, 13 May 2009 09:41:24 -0400
changeset 968 105a24b4de8f
parent 963 b572ce1114f1
child 970 d894086f38cc
permissions -rw-r--r--
ajax: theme selector: no longer lists disallowed themes

<?php

/*
 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
 * Version 1.1.6 (Caoineag beta 1)
 * Copyright (C) 2006-2008 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.
 */

/**
 * The default handler for namespaces. Basically fetches the page text from the database. Other namespaces should extend this class.
 * @package Enano
 * @subpackage PageHandler
 * @author Dan Fuhry <dan@enanocms.org>
 * @license GNU General Public License <http://www.gnu.org/licenses/gpl-2.0.html>
 */

class Namespace_Default
{
  /**
   * Page ID
   * @var string
   */
  
  public $page_id;
  
  /**
   * Namespace
   * @var string
   */
  
  public $namespace;
  
  /**
   * Local copy of the page text
   */
  
  public $text_cache;
  
  /**
   * Revision ID to send. If 0, the latest revision.
   * @var int
   */
  
  public $revision_id = 0;
  
  /**
   * Tracks whether the page exists
   * @var bool
   */
  
  public $exists = false;
  
  /**
   * Page title
   * @var string
   */
  
  public $title = '';
  
  /**
   * PathManager info array ("cdata") for this page. (The one with urlname, name, namespace, delvotes, delvote_ips, protected, visible, etc.)
   * @var array
   */
  
  public $cdata = array();
  
  /**
   * ACL calculation instance for this page.
   * @var object(Session_ACLPageInfo)
   */
  
  public $perms = false;
  
  /**
   * Protection calculation
   * @var bool
   */
  
  public $page_protected = false;
  
  /**
   * Wiki mode calculation
   * @var bool
   */
  
  public $wiki_mode = false;
  
  /**
   * Page conditions. These represent the final decision as to whether an action is allowed or not. They are set to true if ACLs permit AND if
   * the action "makes sense." (e.g., you can't vote to delete a non-wikimode page.)
   * @var array
   */
  
  public $conds = array();
  
  /**
   * Constructor.
   */
  
  public function __construct($page_id, $namespace, $revision_id = 0)
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    
    $this->page_id = sanitize_page_id($page_id);
    $this->namespace = $namespace;
    $this->revision_id = intval($revision_id);
    
    // grab the cdata
    $this->build_cdata();
    
    $this->page_protected = $this->cdata['really_protected'] ? true : false;
    switch($this->cdata['wiki_mode'])
    {
      case 0: $this->wiki_mode = false; break;
      case 1: $this->wiki_mode = true; break;
      default: case 2: $this->wiki_mode = getConfig('wiki_mode') == 1; break;
    }
  }
  
  /**
   * Build the page's cdata.
   */
  
  public function build_cdata()
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    static $cdata_cache = array();
    $pathskey = $paths->get_pathskey($this->page_id, $this->namespace);
    if ( isset($cdata_cache[$pathskey]) )
    {
      $this->cdata = $cdata_cache[$pathskey];
      $this->exists = $cdata_cache[$pathskey]['page_exists'];
      $this->title = $cdata_cache[$pathskey]['name'];
      return null;
    }
    
    $this->exists = false;
    $ns_char = substr($paths->nslist['Special'], -1);
      
    $page_name = $this->namespace == 'Article' ? dirtify_page_id($this->page_id) : "{$this->namespace}{$ns_char}" . dirtify_page_id($this->page_id);
    $this->cdata = array(
      'name' => $page_name,
      'urlname' => $this->page_id,
      'namespace' => $this->namespace,
      'special' => 0,
      'visible' => 0,
      'comments_on' => 1,
      'protected' => 0,
      'delvotes' => 0,
      'delvote_ips' => '',
      'wiki_mode' => 2,
      'page_exists' => false,
      'page_format' => getConfig('default_page_format', 'wikitext')
    );
    
    if ( $data_from_db = Namespace_Default::get_cdata_from_db($this->page_id, $this->namespace) )
    {
      $this->exists = true;
      $this->cdata = $data_from_db;
      $this->cdata['page_exists'] = true;
      $this->title = $this->cdata['name'];
    }
        
    $this->cdata = Namespace_Default::bake_cdata($this->cdata);
    
    $cdata_cache[$pathskey] = $this->cdata;
  }
  
  /**
   * Pulls the page's actual text from the database.
   */
  
  function fetch_text()
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    
    if ( !empty($this->text_cache) )
    {
      return $this->text_cache;
    }
    
    if ( $this->revision_id > 0 && is_int($this->revision_id) )
    {
    
      $q = $db->sql_query('SELECT page_text, char_tag, time_id FROM '.table_prefix.'logs WHERE log_type=\'page\' AND action=\'edit\' AND page_id=\'' . $this->page_id . '\' AND namespace=\'' . $this->namespace . '\' AND log_id=' . $this->revision_id . ';');
      if ( !$q )
      {
        $this->send_error('Error during SQL query.', true);
      }
      if ( $db->numrows() < 1 )
      {
        // Compatibility fix for old pages with dots in the page ID
        if ( strstr($this->page_id, '.2e') )
        {
          $db->free_result();
          $page_id = str_replace('.2e', '.', $this->page_id);
          $q = $db->sql_query('SELECT page_text, char_tag, time_id FROM '.table_prefix.'logs WHERE log_type=\'page\' AND action=\'edit\' AND page_id=\'' . $page_id . '\' AND namespace=\'' . $this->namespace . '\' AND log_id=' . $this->revision_id . ';');
          if ( !$q )
          {
            $this->send_error('Error during SQL query.', true);
          }
          if ( $db->numrows() < 1 )
          {
            $this->page_exists = false;
            return 'err_no_text_rows';
          }
        }
        else
        {
          $this->page_exists = false;
          return 'err_no_text_rows';
        }
      }
      else
      {
        $row = $db->fetchrow();
      }
      
      $db->free_result();
      
    }
    else
    {
      $q = $db->sql_query('SELECT t.page_text, t.char_tag, l.time_id FROM '.table_prefix."page_text AS t\n"
                        . "  LEFT JOIN " . table_prefix . "logs AS l\n"
                        . "    ON ( l.page_id = t.page_id AND l.namespace = t.namespace )\n"
                        . "  WHERE t.page_id='$this->page_id' AND t.namespace='$this->namespace'\n"
                        . "  ORDER BY l.time_id DESC LIMIT 1;");
      if ( !$q )
      {
        $this->send_error('Error during SQL query.', true);
      }
      if ( $db->numrows() < 1 )
      {
        // Compatibility fix for old pages with dots in the page ID
        if ( strstr($this->page_id, '.2e') )
        {
          $db->free_result();
          $page_id = str_replace('.2e', '.', $this->page_id);
          $q = $db->sql_query('SELECT page_text, char_tag FROM '.table_prefix.'page_text WHERE page_id=\'' . $page_id . '\' AND namespace=\'' . $this->namespace . '\';');
          if ( !$q )
          {
            $this->send_error('Error during SQL query.', true);
          }
          if ( $db->numrows() < 1 )
          {
            $this->page_exists = false;
            return 'err_no_text_rows';
          }
        }
        else
        {
          $this->page_exists = false;
          return 'err_no_text_rows';
        }
      }
      
      $row = $db->fetchrow();
      $db->free_result();
      
    }
    
    if ( !empty($row['char_tag']) )
    {
      // This page text entry uses the old text-escaping format
      $from = array(
          "{APOS:{$row['char_tag']}}",
          "{QUOT:{$row['char_tag']}}",
          "{SLASH:{$row['char_tag']}}"
        );
      $to = array("'", '"',  '\\');
      $row['page_text'] = str_replace($from, $to, $row['page_text']);
    }
    
    $this->text_cache = $row['page_text'];
    
    if ( isset($row['time_id']) )
    {
      $this->revision_time = intval($row['time_id']);
    }
    
    return $row['page_text'];
  }
  
  /**
   * Send the page.
   */
  
  public function send()
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    global $output;
    
    $output->add_before_footer($this->display_categories());
    
    if ( $this->exists )
      $this->send_from_db();
    else
    {
      // This is the DEPRECATED way to extend namespaces. It's left in only for compatibility with older plugins.
      ob_start();
      $code = $plugins->setHook('page_not_found');
      foreach ( $code as $cmd )
      {
        eval($cmd);
      }
      $c = ob_get_contents();
      if ( !empty($c) )
      {
        ob_end_clean();
        echo $c;
      }
      else
      {
        $output->header();
        $this->error_404();
        $output->footer();
      }
    }
  }
  
  /**
   * Get a redirect, if there is one.
   * @return mixed Array: Page ID and namespace, associative; bool: false (no redirect)
   */
  
  public function get_redirect()
  {
    $text = $this->fetch_text();
    if ( preg_match('/^#redirect \[\[([^\]]+?)\]\]/i', $text, $match ) )
    {
      list($page_id, $namespace) = RenderMan::strToPageID($match[1]);
      return array(
          'page_id' => $page_id,
          'namespace' => $namespace
        );
    }
    return false;
  }
   
  /**
   * The "real" send-the-page function. The reason for this is so other namespaces can re-use the code
   * to fetch the page from the DB while being able to install their own wrappers.
   */
  
  public function send_from_db($incl_inner_headers = true, $send_headers = true)
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    global $lang;
    global $output;
    
    $text = $this->fetch_text();
    
    profiler_log("Namespace [$this->namespace, $this->page_id]: pulled text from DB");
    
    $text = preg_replace('/([\s]*)__NOBREADCRUMBS__([\s]*)/', '', $text);
    $text = preg_replace('/([\s]*)__NOTOC__([\s]*)/', '', $text);
    $text = preg_replace('/^#redirect \[\[.+?\]\]\s*/i', '', $text);
    
    if ( $send_headers )
    {
      $output->set_title($this->title);
      $output->header();
    }
    $this->do_breadcrumbs();
    
    if ( $incl_inner_headers )
    {
      if ( !$this->perms )
        $this->perms = $session->fetch_page_acl($this->page_id, $this->namespace);
      
      if ( $this->perms->get_permissions('vote_reset') && $this->cdata['delvotes'] > 0)
      {
        $delvote_ips = unserialize($this->cdata['delvote_ips']);
        $hr = htmlspecialchars(implode(', ', $delvote_ips['u']));
        
        $string_id = ( $this->cdata['delvotes'] == 1 ) ? 'delvote_lbl_votes_one' : 'delvote_lbl_votes_plural';
        $string = $lang->get($string_id, array('num_users' => $this->cdata['delvotes']));
        
        echo '<div class="info-box" style="margin-left: 0; margin-top: 5px;" id="mdgDeleteVoteNoticeBox">
                <b>' . $lang->get('etc_lbl_notice') . '</b> ' . $string . '<br />
                <b>' . $lang->get('delvote_lbl_users_that_voted') . '</b> ' . $hr . '<br />
                <a href="'.makeUrl($paths->page, 'do=deletepage').'" onclick="ajaxDeletePage(); return false;">' . $lang->get('delvote_btn_deletepage') . '</a>  |  <a href="'.makeUrl($paths->page, 'do=resetvotes').'" onclick="ajaxResetDelVotes(); return false;">' . $lang->get('delvote_btn_resetvotes') . '</a>
              </div>';
      }
    }
    
    if ( $this->revision_id )
    {
      echo '<div class="info-box" style="margin-left: 0; margin-top: 5px;">
              <b>' . $lang->get('page_msg_archived_title') . '</b><br />
              ' . $lang->get('page_msg_archived_body', array(
                  'archive_date' => enano_date('F d, Y', $this->revision_time),
                  'archive_time' => enano_date('h:i a', $this->revision_time),
                  'current_link' => makeUrlNS($this->namespace, $this->page_id),
                  'restore_link' => makeUrlNS($this->namespace, $this->page_id, 'do=edit&amp;revid='.$this->revision_id),
                  'restore_onclick' => 'ajaxEditor(\''.$this->revision_id.'\'); return false;',
                )) . '
            </div>';
      $q = $db->sql_query('SELECT page_format FROM ' . table_prefix . "logs WHERE log_id = {$this->revision_id};");
      if ( !$q )
        $db->_die();
      
      list($page_format) = $db->fetchrow_num();
      $db->free_result();
    }
    else
    {
      $page_format = $this->cdata['page_format'];
    }
    
    $code = $plugins->setHook('pageprocess_render_head');
    foreach ( $code as $cmd )
    {
      eval($cmd);
    }
    
    $prof_contentevent = profiler_log("Namespace [$this->namespace, $this->page_id]: headers and preprocessing done - about to send content");
    
    if ( $incl_inner_headers )
    {
      if ( $page_format === 'wikitext' )
      {
        $text = '?>' . RenderMan::render($text);
      }
      else
      {
        // Page format is XHTML. This means we want to disable functionality that MCE takes care of, while still retaining
        // the ability to wikilink, the ability to use images, etc. Basically, RENDER_INLINEONLY disables all behavior in
        // the rendering engine/Text_Wiki that conflicts with MCE.
        $text = '?>' . RenderMan::render($text, RENDER_WIKI_DEFAULT | RENDER_INLINEONLY);
      }
    }
    else
    {
      $text = '?>' . $text;
      $text = preg_replace('/<nowiki>(.*?)<\/nowiki>/s', '\\1', $text);
    }
    
    eval ( $text );
    
    profiler_log("Namespace [$this->namespace, $this->page_id]: content sent", true, $prof_contentevent);
    
    $code = $plugins->setHook('pageprocess_render_tail');
    foreach ( $code as $cmd )
    {
      eval($cmd);
    }
    
    if ( $incl_inner_headers )
    {
      display_page_footers();
    }
    
    profiler_log("Namespace [$this->namespace, $this->page_id]: sent footers");
    
    if ( $send_headers )
      $output->footer();
  }
  
  /**
   * Echoes out breadcrumb data, if appropriate.
   * @access private
   */
  
  function do_breadcrumbs()
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    global $lang;
    
    if ( strpos($this->text_cache, '__NOBREADCRUMBS__') !== false )
      return false;
    
    $mode = getConfig('breadcrumb_mode');
    
    if ( $mode == 'never' )
      // Breadcrumbs are disabled
      return true;
      
    // Minimum depth for breadcrumb display
    $threshold = ( $mode == 'always' ) ? 0 : 1;
    
    $breadcrumb_data = explode('/', $this->page_id);
    if ( count($breadcrumb_data) > $threshold )
    {
      // If we're not on a subpage of the main page, add "Home" to the list
      $show_home = false;
      if ( $mode == 'always' )
      {
        $show_home = true;
      }
      echo '<!-- Start breadcrumbs -->
            <div class="breadcrumbs">
              ';
      if ( $show_home )
      {
        // Display the "home" link first.
        $pathskey = $paths->nslist[ $this->namespace ] . $this->page_id;
        if ( $pathskey !== get_main_page() )
          echo '<a href="' . makeUrl(get_main_page(), false, true) . '">';
        echo $lang->get('onpage_btn_breadcrumbs_home');
        if ( $pathskey !== get_main_page() )
          echo '</a>';
      }
      foreach ( $breadcrumb_data as $i => $crumb )
      {
        $cumulative = implode('/', array_slice($breadcrumb_data, 0, ( $i + 1 )));
        if ( $show_home && $cumulative === get_main_page() )
          continue;
        if ( $show_home || $i > 0 )
          echo ' &raquo; ';
        $title = ( isPage($cumulative) ) ? get_page_title($cumulative) : get_page_title($crumb);
        if ( $i + 1 == count($breadcrumb_data) )
        {
          echo htmlspecialchars($title);
        }
        else
        {
          $exists = ( isPage($cumulative) ) ? '' : ' class="wikilink-nonexistent"';
          echo '<a href="' . makeUrl($cumulative, false, true) . '"' . $exists . '>' . htmlspecialchars($title) . '</a>';
        }
      }
      echo '</div>
            <!-- End breadcrumbs -->
            ';
    }
  }
  
  public function error_404($userpage = false)
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    global $lang, $output;
    
    @header('HTTP/1.1 404 Not Found');
    
    $msg = ( $pp = $paths->sysmsg('Page_not_found') ) ? $pp : '{STANDARD404}';
    
    $standard_404 = '';
    
    if ( $userpage )
    {
      $standard_404 .= '<h3>' . $lang->get('page_msg_404_title_userpage') . '</h3>
             <p>' . $lang->get('page_msg_404_body_userpage');
    }
    else
    {
      $standard_404 .= '<h3>' . $lang->get('page_msg_404_title') . '</h3>
             <p>' . $lang->get('page_msg_404_body');
    }
    if ( $session->get_permissions('create_page') )
    {
      $standard_404 .= ' ' . $lang->get('page_msg_404_create', array(
          'create_flags' => 'href="'.makeUrlNS($this->namespace, $this->page_id, 'do=edit', true).'" onclick="ajaxEditor(); return false;"',
          'mainpage_link' => makeUrl(get_main_page(), false, true)
        ));
    }
    else
    {
      $standard_404 .= ' ' . $lang->get('page_msg_404_gohome', array(
          'mainpage_link' => makeUrl(get_main_page(), false, true)
        ));
    }
    $standard_404 .= '</p>';
    if ( $session->get_permissions('history_rollback') )
    {
      $e = $db->sql_query('SELECT * FROM ' . table_prefix . 'logs WHERE action=\'delete\' AND page_id=\'' . $this->page_id . '\' AND namespace=\'' . $this->namespace . '\' ORDER BY time_id DESC;');
      if ( !$e )
      {
        $db->_die('The deletion log could not be selected.');
      }
      if ( $db->numrows() > 0 )
      {
        $r = $db->fetchrow();
        $standard_404 .= '<p>' . $lang->get('page_msg_404_was_deleted', array(
                  'delete_time' => enano_date('d M Y h:i a', $r['time_id']),
                  'delete_reason' => htmlspecialchars($r['edit_summary']),
                  'rollback_flags' => 'href="'.makeUrl($paths->page, 'do=rollback&amp;id='.$r['log_id']).'" onclick="ajaxRollback(\''.$r['log_id'].'\'); return false;"'
                ))
              . '</p>';
        if ( $session->user_level >= USER_LEVEL_ADMIN )
        {
          $standard_404 .= '<p>' . $lang->get('page_msg_404_admin_opts', array(
                    'detag_link' => makeUrl($paths->page, 'do=detag', true)
                  ))
                . '</p>';
        }
      }
      $db->free_result();
    }
    $standard_404 .= '<p>
            ' . $lang->get('page_msg_404_http_response') . '
          </p>';
          
    $parser = $template->makeParserText($msg);
    $parser->assign_vars(array(
        'STANDARD404' => $standard_404
      ));
    
    $msg = RenderMan::render($parser->run());
    eval( '?>' . $msg );
  }
  
  /**
   * Display the categories a page is in. If the current page is a category, its contents will also be printed.
   */
  
  function display_categories()
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    global $lang;
    
    $html = '';
    
    if ( $this->namespace == 'Category' )
    {
      // Show member pages and subcategories
      $q = $db->sql_query('SELECT p.urlname, p.namespace, p.name, p.namespace=\'Category\' AS is_category FROM '.table_prefix.'categories AS c
                             LEFT JOIN '.table_prefix.'pages AS p
                               ON ( p.urlname = c.page_id AND p.namespace = c.namespace )
                             WHERE c.category_id=\'' . $db->escape($this->page_id) . '\'
                             ORDER BY is_category DESC, p.name ASC;');
      if ( !$q )
      {
        $db->_die();
      }
      $html .= '<h3>' . $lang->get('onpage_cat_heading_subcategories') . '</h3>';
      $html .= '<div class="tblholder">';
      $html .= '<table border="0" cellspacing="1" cellpadding="4">';
      $html .= '<tr>';
      $ticker = 0;
      $counter = 0;
      $switched = false;
      $class  = 'row1';
      while ( $row = $db->fetchrow() )
      {
        if ( $row['is_category'] == 0 && !$switched )
        {
          if ( $counter > 0 )
          {
            // Fill-in
            while ( $ticker < 3 )
            {
              $ticker++;
              $html .= '<td class="' . $class . '" style="width: 33.3%;"></td>';
            }
          }
          else
          {
            $html .= '<td class="' . $class . '">' . $lang->get('onpage_cat_msg_no_subcategories') . '</td>';
          }
          $html .= '</tr></table></div>' . "\n\n";
          $html .= '<h3>' . $lang->get('onpage_cat_heading_pages') . '</h3>';
          $html .= '<div class="tblholder">';
          $html .= '<table border="0" cellspacing="1" cellpadding="4">';
          $html .= '<tr>';
          $counter = 0;
          $ticker = -1;
          $switched = true;
        }
        $counter++;
        $ticker++;
        if ( $ticker == 3 )
        {
          $html .= '</tr><tr>';
          $ticker = 0;
          $class = ( $class == 'row3' ) ? 'row1' : 'row3';
        }
        $html .= "<td class=\"{$class}\" style=\"width: 33.3%;\">"; // " to workaround stupid jEdit bug
        
        $link = makeUrlNS($row['namespace'], sanitize_page_id($row['urlname']));
        $html .= '<a href="' . $link . '"';
        $key = $paths->nslist[$row['namespace']] . sanitize_page_id($row['urlname']);
        if ( !isPage( $key ) )
        {
          $html .= ' class="wikilink-nonexistent"';
        }
        $html .= '>';
        $title = get_page_title_ns($row['urlname'], $row['namespace']);
        $html .= htmlspecialchars($title);
        $html .= '</a>';
        
        $html .= "</td>";
      }
      if ( !$switched )
      {
        if ( $counter > 0 )
        {
          // Fill-in
          while ( $ticker < 2 )
          {
            $ticker++;
            $html .= '<td class="' . $class . '" style="width: 33.3%;"></td>';
          }
        }
        else
        {
          $html .= '<td class="' . $class . '">' . $lang->get('onpage_cat_msg_no_subcategories') . '</td>';
        }
        $html .= '</tr></table></div>' . "\n\n";
        $html .= '<h3>' . $lang->get('onpage_cat_heading_pages') . '</h3>';
        $html .= '<div class="tblholder">';
        $html .= '<table border="0" cellspacing="1" cellpadding="4">';
        $html .= '<tr>';
        $counter = 0;
        $ticker = 0;
        $switched = true;
      }
      if ( $counter > 0 )
      {
        // Fill-in
        while ( $ticker < 2 )
        {
          $ticker++;
          $html .= '<td class="' . $class . '" style="width: 33.3%;"></td>';
        }
      }
      else
      {
        $html .= '<td class="' . $class . '">' . $lang->get('onpage_cat_msg_no_pages') . '</td>';
      }
      $html .= '</tr></table></div>' . "\n\n";
    }
    
    if ( $this->namespace != 'Special' && $this->namespace != 'Admin' )
    {
      $html .= '<div class="mdg-comment" style="margin: 10px 0 0 0;" id="category_box_wrapper">';
      $html .= '<div style="float: right;">';
      $html .= '(<a href="#" onclick="ajaxCatToTag(); return false;">' . $lang->get('tags_catbox_link') . '</a>)';
      $html .= '</div>';
      $html .= '<div id="mdgCatBox">' . $lang->get('catedit_catbox_lbl_categories') . ' ';
      
      $where = '( c.page_id=\'' . $db->escape($this->page_id) . '\' AND c.namespace=\'' . $db->escape($this->namespace) . '\' )';
      $prefix = table_prefix;
      $sql = <<<EOF
SELECT c.category_id FROM {$prefix}categories AS c
  LEFT JOIN {$prefix}pages AS p
    ON ( ( p.urlname = c.page_id AND p.namespace = c.namespace ) OR ( p.urlname IS NULL AND p.namespace IS NULL ) )
  WHERE $where
  ORDER BY p.name ASC, c.page_id ASC;
EOF;
      $q = $db->sql_query($sql);
      if ( !$q )
        $db->_die();
      
      if ( $row = $db->fetchrow() )
      {
        $list = array();
        do
        {
          $cid = sanitize_page_id($row['category_id']);
          $title = get_page_title_ns($cid, 'Category');
          $link = makeUrlNS('Category', $cid);
          $list[] = '<a href="' . $link . '">' . htmlspecialchars($title) . '</a>';
        }
        while ( $row = $db->fetchrow($q) );
        $html .= implode(', ', $list);
      }
      else
      {
        $html .= $lang->get('catedit_catbox_lbl_uncategorized');
      }
      
      $can_edit = ( $session->get_permissions('edit_cat') && ( !$paths->page_protected || $session->get_permissions('even_when_protected') ) );
      if ( $can_edit )
      {
        $edit_link = '<a href="' . makeUrl($paths->page, 'do=catedit', true) . '" onclick="ajaxCatEdit(); return false;">' . $lang->get('catedit_catbox_link_edit') . '</a>';
        $html .= ' [ ' . $edit_link . ' ]';
      }
      
      $html .= '</div></div>';
    }
    return $html;
  }
  
  /**
   * Pull in switches as to whether a specific toolbar button should be used or not. This sets things up according to the current page being displayed.
   * @return array Associative
   */
  
  function set_conds()
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    
    if ( !$this->perms )
      $this->perms = $session->fetch_page_acl($this->page_id, $this->namespace);
    
    $enforce_protection = ( $this->page_protected && ( ( $session->check_acl_scope('even_when_protected', $this->namespace) && !$this->perms->get_permissions('even_when_protected') ) || !$session->check_acl_scope('even_when_protected', $this->namespace) ) );
    
    $conds = array();
    
    // Article: always show
    $conds['article'] = true;
    
    // Discussion: Show if comments are enabled on the site, and if comments are on for this page.
    $conds['comments'] = $this->perms->get_permissions('read') && getConfig('enable_comments', '1')=='1' && $this->cdata['comments_on'] == 1;
    
    // Edit: Show if we have permission to edit the page, and if we don't have protection in effect
    $conds['edit'] = $this->perms->get_permissions('read') && $session->check_acl_scope('edit_page', $this->namespace) && $this->perms->get_permissions('edit_page') && !$enforce_protection;
    
    // View source: Show if we have permission to view source and either ACLs prohibit editing or protection is in effect
    $conds['viewsource'] = $session->check_acl_scope('view_source', $this->namespace) && $this->perms->get_permissions('view_source') && ( !$this->perms->get_permissions('edit_page') || $enforce_protection ) && $this->namespace != 'API';
    
    // History: Show if we have permission to see history and if the page exists
    $conds['history'] = $session->check_acl_scope('history_view', $this->namespace) && $this->exists && $this->perms->get_permissions('history_view');
    
    // Rename: Show if the page exists, if we have permission to rename, and if protection isn't in effect
    $conds['rename'] = $session->check_acl_scope('rename', $this->namespace) && $this->exists && $this->perms->get_permissions('rename') && !$enforce_protection;
    
    // Vote-to-delete: Show if we have Wiki Mode on, if we have permission to vote for deletion, and if the page exists (can't vote to delete a nonexistent page)
    $conds['delvote'] = $this->wiki_mode && $session->check_acl_scope('vote_delete', $this->namespace) && $this->perms->get_permissions('vote_delete') && $this->exists;
    
    // Reset votes: Show if we have Wiki Mode on, if we have permission to reset votes, if the page exists, and if there's at least one vote
    $conds['resetvotes'] = $session->check_acl_scope('vote_reset', $this->namespace) && $this->wiki_mode && $this->exists && $this->perms->get_permissions('vote_reset') && $this->cdata['delvotes'] > 0;
    
    // Delete page: Show if the page exists and if we have permission to delete it
    $conds['delete'] = $session->check_acl_scope('delete_page', $this->namespace) && $this->exists && $this->perms->get_permissions('delete_page');
    
    // Printable view: Show if the page exists
    $conds['printable'] = $this->exists;
    
    // Protect: Show if we have Wiki Mode on, if the page exists, and if we have permission to protect the page.
    $conds['protect'] = $session->check_acl_scope('protect', $this->namespace) && $this->wiki_mode && $this->exists && $this->perms->get_permissions('protect');
    
    // Set Wiki Mode: Show if the page exists and if we have permission to set wiki mode
    $conds['setwikimode'] = $session->check_acl_scope('set_wiki_mode', $this->namespace) && $this->exists && $this->perms->get_permissions('set_wiki_mode');
    
    // Clear logs: Show if we have permission to clear logs
    $conds['clearlogs'] = $session->check_acl_scope('clear_logs', $this->namespace) && $this->perms->get_permissions('clear_logs');
    
    // Set password: a little bit complicated. If there's a password, check for password_reset; else, check for password_set.
    $conds['password'] = empty($this->cdata['password']) ?
                           $session->check_acl_scope('password_set', $this->namespace) && $this->perms->get_permissions('password_set') :
                           $session->check_acl_scope('password_reset', $this->namespace) && $this->perms->get_permissions('password_reset');
    
    // Edit ACLs: Show if this is a non-Enano page that's calling the Enano API and (a) if we have permissions to edit ACLs or (b) we're an admin AND ACL_ALWAYS_ALLOW_ADMIN_EDIT_ACL is on
    $conds['acledit'] = $this->namespace != 'API' && $session->check_acl_scope('edit_acl', $this->namespace) && ( $this->perms->get_permissions('edit_acl') || ( defined('ACL_ALWAYS_ALLOW_ADMIN_EDIT_ACL') &&  $session->user_level >= USER_LEVEL_ADMIN ) );
    
    // Admin page: Show if the page exists and if we're an admin
    $conds['adminpage'] = $session->user_level >= USER_LEVEL_ADMIN && $this->exists;
    
    // Allow plugins to change stuff
    $code = $plugins->setHook('page_conds_set');
    foreach ( $code as $cmd )
    {
      eval($cmd);
    }
    
    $this->conds = $conds;
  }
  
  /**
   * Return page conditions
   * @return array
   */
  
  public function get_conds()
  {
    if ( empty($this->conds) )
      $this->set_conds();
    
    return $this->conds;
  }
  
  /**
   * Just tell us if the current page exists or not.
   * @return bool
   */
   
  public function exists()
  {
    return $this->exists;
  }
  
  /**
   * Return cdata
   * @return array
   */
  
  public function get_cdata()
  {
    return $this->cdata;
  }
  
  /**
   * Bake, or finalize the processing of, a cdata array.
   * @static
   * @access public
   */
  
  public static function bake_cdata($cdata)
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    
    // urlname_nons is the actual page_id.
    $cdata['urlname_nons'] = $cdata['urlname'];
    if ( isset($paths->nslist[ $cdata['namespace'] ]) )
    {
      $cdata['urlname'] = $paths->nslist[ $cdata['namespace'] ] . $cdata['urlname'];
    }
    else
    {
      $ns_char = substr($paths->nslist['Special'], -1);
      $cdata['urlname'] = $cdata['namespace'] . $ns_char . $cdata['urlname'];
    }
    
    // fix up deletion votes
    if ( empty($cdata['delvotes']) )
      $cdata['delvotes'] = 0;
    
    // calculate wiki mode
    $cdata['really_wiki_mode'] = ( $cdata['wiki_mode'] == 1 || ( $cdata['wiki_mode'] == 2 && getConfig('wiki_mode', 0) == 1 ) );
    
    // calculate protection
    $cdata['really_protected'] = ( $cdata['protected'] > 0 );
    if ( $cdata['protected'] == 2 )
    {
      $cdata['really_protected'] = !$session->user_logged_in || ( $session->user_logged_in && $session->reg_time + 86400*4 > time() );
    }
    
    return $cdata;
  }
  
  /**
   * Grabs raw (unbaked) cdata from the database, caching if possible.
   * @param string Page ID
   * @param string Namespace.
   * @static
   */
  
  public static function get_cdata_from_db($page_id, $namespace)
  {
    global $db, $session, $paths, $template, $plugins; // Common objects
    static $cache = array();
    
    $pathskey = $paths->get_pathskey($page_id, $namespace);
    if ( isset($cache[$pathskey]) )
      return $cache[$pathskey];
    
    $page_id_db = $db->escape($page_id);
    $namespace_db = $db->escape($namespace);
    
    $q = $db->sql_query('SELECT * FROM ' . table_prefix . "pages WHERE urlname = '$page_id_db' AND namespace = '$namespace_db';");
    if ( !$q )
      $db->_die();
    
    if ( $db->numrows() < 1 )
    {
      $db->free_result();
      $cache[$pathskey] = false;
      return false;
    }
    
    $row = $db->fetchrow();
    $cache[$pathskey] = $row;
    return $row;
  }
}

/**
 * The namespaces that use the default handler.
 */

class Namespace_Article extends Namespace_Default
{
}

class Namespace_Project extends Namespace_Default
{
}

class Namespace_Help extends Namespace_Default
{
}

class Namespace_Category extends Namespace_Default
{
}