--- a/includes/plugins.php	Wed Feb 06 19:27:43 2008 -0500
+++ b/includes/plugins.php	Thu Feb 07 07:58:07 2008 -0500
@@ -16,7 +16,7 @@
   var $hook_list;
   var $load_list;
   var $loaded_plugins;
-  var $system_plugins = Array('SpecialUserFuncs.php','SpecialUserPrefs.php','SpecialPageFuncs.php','SpecialAdmin.php','SpecialCSS.php','SpecialUpdownload.php','SpecialSearch.php','PrivateMessages.php','SpecialGroups.php');
+  var $system_plugins = Array('SpecialUserFuncs.php','SpecialUserPrefs.php','SpecialPageFuncs.php','SpecialAdmin.php','SpecialCSS.php','SpecialUpdownload.php','SpecialSearch.php','PrivateMessages.php','SpecialGroups.php', 'SpecialRecentChanges.php');
   function loadAll() 
   {
     $dir = ENANO_ROOT.'/plugins/';

--- a/language/english/core.json	Wed Feb 06 19:27:43 2008 -0500
+++ b/language/english/core.json	Thu Feb 07 07:58:07 2008 -0500
@@ -457,6 +457,7 @@
       btn_login: 'Log in',
       btn_logout: 'Log out',
       btn_changestyle: 'Change theme',
+      btn_recent_changes: 'Recent edits',
     },
     perm: {
       read: 'Read page(s)',

--- a/language/english/tools.json	Wed Feb 06 19:27:43 2008 -0500
+++ b/language/english/tools.json	Thu Feb 07 07:58:07 2008 -0500
@@ -47,6 +47,7 @@
       member_list: 'Member list',
       language_export: 'Language exporter',
       private_messages: 'Private Messages',
+      recent_changes: 'Recent changes',
     },
     search: {
       th_advanced_search: 'Advanced Search',
@@ -125,6 +126,12 @@
       tagcloud_sidebar_btn_larger: 'Larger version',
       tagcloug_tip_popularity_one: '1 page',
       tagcloug_tip_popularity_plural: '%popularity% pages',
+      
+      // Recent changes
+      rc_btn_diff: 'diff',
+      rc_btn_hist: 'hist',
+      rc_btn_pm: 'PM',
+      rc_btn_usertalk: 'comment',
     },
   }
 };

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/SpecialRecentChanges.php	Thu Feb 07 07:58:07 2008 -0500
@@ -0,0 +1,205 @@
+<?php
+/*
+Plugin Name: plugin_specialrecentchanges_title
+Plugin URI: http://enanocms.org/
+Description: plugin_specialrecentchanges_desc
+Author: Dan Fuhry
+Version: 1.1.1
+Author URI: http://enanocms.org/
+*/
+
+/*
+ * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
+ * Version 1.0.3
+ * 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.
+ */
+ 
+global $db, $session, $paths, $template, $plugins; // Common objects
+
+$plugins->attachHook('session_started', '
+  global $paths;
+    $paths->add_page(Array(
+      \'name\'=>\'specialpage_recent_changes\',
+      \'urlname\'=>\'RecentChanges\',
+      \'namespace\'=>\'Special\',
+      \'special\'=>0,\'visible\'=>1,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\',
+      ));
+    ');
+
+function page_Special_RecentChanges()
+{
+  global $db, $session, $paths, $template, $plugins; // Common objects
+  global $lang;
+  
+  // One super-loaded SQL query to fetch all the info we need:
+  // (theoretical)
+  //   SELECT ( CHAR_LENGTH(l1.page_text) - CHAR_LENGTH(l2.page_text) ) AS size_change, l1.author, l1.page_id, l1.namespace, l1.edit_summary,
+  //       l1.time_id AS currev_time, l2.time_id AS oldrev_time
+  //     FROM logs AS l1
+  //     LEFT JOIN logs AS l2                                                    
+  //       ON ( l1.log_type = l2.log_type AND l1.action = 'edit' AND l1.action = l2.action AND l2.time_id < l1.time_id AND l1.page_id = l2.page_id AND l1.namespace = l2.namespace )
+  //     WHERE l2.time_id IS NOT NULL
+  //     GROUP BY l1.page_id, l1.namespace
+  //     ORDER BY l2.time_id DESC, l1.time_id DESC;
+  // (the actual query is generated based on filter criteria)
+  // How it works:
+  //  * Join the logs table with itself
+  //  * Select the size_change virtual column, which is based on current_rev_length - old_rev_length
+  //  * Use GROUP BY to group rows from the same page together
+  //  * Make sure that the time_id in the second instance (l2) of enano_logs is LESS than the time_id in the first instance (l1)
+  //  * Use ORDER BY to ensure that the latest revision before current is selected
+  
+  $where_extra = '';
+  if ( isset($_GET['filter_author']) && is_array($_GET['filter_author']) )
+  {
+    $f_author = $_GET['filter_author'];
+    foreach ( $f_author as &$author )
+    {
+      $author = $db->escape($author);
+    }
+    $f_author = "\n    AND (\n      l1.author = '" . implode("'\n      OR l1.author = '", $f_author) . "'\n    )";
+    $where_extra .= $f_author;
+  }
+  
+  if ( ENANO_DBLAYER == 'MYSQL' )
+  {
+    $sql = 'SELECT ( CHAR_LENGTH(l1.page_text) - CHAR_LENGTH(l2.page_text) ) AS size_change, l1.author, l1.page_id, l1.namespace, l1.edit_summary,
+    l1.time_id AS currev_time, l2.time_id AS oldrev_time
+  FROM ' . table_prefix . 'logs AS l1
+  LEFT JOIN ' . table_prefix . 'logs AS l2                                                    
+    ON ( l1.log_type = l2.log_type AND l1.action = \'edit\' AND l1.action = l2.action AND l2.time_id < l1.time_id AND l1.page_id = l2.page_id AND l1.namespace = l2.namespace )
+  WHERE l2.time_id IS NOT NULL' . $where_extra . '
+  GROUP BY oldrev_time
+  ORDER BY l1.time_id DESC, l2.time_id DESC;';
+  }
+  else
+  {
+    $sql = 'SELECT DISTINCT ON (l1.time_id) ( CHAR_LENGTH(l1.page_text) - CHAR_LENGTH(l2.page_text) ) AS size_change, l1.author, l1.page_id, l1.namespace, l1.edit_summary,
+    l1.time_id AS currev_time, l2.time_id AS oldrev_time
+  FROM ' . table_prefix . 'logs AS l1
+  LEFT JOIN ' . table_prefix . 'logs AS l2                                                    
+    ON ( l1.log_type = l2.log_type AND l1.action = \'edit\' AND l1.action = l2.action AND l2.time_id < l1.time_id AND l1.page_id = l2.page_id AND l1.namespace = l2.namespace )
+  WHERE l2.time_id IS NOT NULL' . $where_extra . '
+  GROUP BY l1.time_id, l1.page_id, l1.namespace, l1.author, l1.edit_summary, l2.time_id, l1.page_text, l2.page_text
+  ORDER BY l1.time_id DESC, l2.time_id DESC;';
+  }
+  
+  $template->header();
+  
+  $q = $db->sql_unbuffered_query($sql);
+  if ( !$q )
+    $db->_die();
+  
+  if ( $row = $db->fetchrow($q) )
+  {
+    echo '<p>';
+    do
+    {
+      $css = rch_get_css($row['size_change']);
+      $pagekey = ( isset($paths->nslist[$row['namespace']]) ) ? $paths->nslist[$row['namespace']] . $row['page_id'] : $row['namespace'] . ':' . $row['page_id'];
+      $pagekey = sanitize_page_id($pagekey);
+      
+      // diff button
+      echo '(';
+      if ( isPage($pagekey) )
+      {
+        echo '<a href="' . makeUrlNS($row['namespace'], $row['page_id'], "do=diff&diff1={$row['oldrev_time']}&diff2={$row['currev_time']}", true) . '">';
+      }
+      echo $lang->get('pagetools_rc_btn_diff');
+      if ( isPage($pagekey) )
+      {
+        echo '</a>';
+      }
+      echo ') ';
+      
+      // hist button
+      echo '(';
+      if ( isPage($pagekey) )
+      {
+        echo '<a href="' . makeUrlNS($row['namespace'], $row['page_id'], "do=history", true) . '">';
+      }
+      echo $lang->get('pagetools_rc_btn_hist');
+      if ( isPage($pagekey) )
+      {
+        echo '</a>';
+      }
+      echo ') . . ';
+      
+      // link to the page
+      $cls = ( isPage($pagekey) ) ? '' : ' class="wikilink-nonexistent"';
+      echo '<a href="' . makeUrlNS($row['namespace'], $row['page_id']) . '"' . $cls . '>' . htmlspecialchars(get_page_title_ns($row['page_id'], $row['namespace'])) . '</a>; ';
+      
+      // date
+      $today = time() - ( time() % 86400 );
+      $date = ( $row['currev_time'] > $today ) ? '' : MemberlistFormatter::format_date($row['currev_time']) . ' ';
+      $date .= date('h:i s', $row['currev_time']);
+      echo "$date . . ";
+      
+      // size counter
+      $size_change = number_format($row['size_change']);
+      if ( substr($size_change, 0, 1) != '-' )
+        $size_change = "+$size_change";
+      
+      echo "<span style=\"$css\">({$size_change})</span>";
+      
+      // link to userpage
+      echo ' . . ';
+      $cls = ( isPage($paths->nslist['User'] . $row['author']) ) ? '' : ' class="wikilink-nonexistent"';
+      echo '<a href="' . makeUrlNS('User', sanitize_page_id($row['author']), false, true) . '"' . $cls . '>' . htmlspecialchars($row['author']) . '</a> ';
+      echo '(';
+      echo '<a href="' . makeUrlNS('Special', 'PrivateMessages/Compose/To/' . sanitize_page_id($row['author']), false, true) . '">';
+      echo $lang->get('pagetools_rc_btn_pm');
+      echo '</a>, ';
+      echo '<a href="' . makeUrlNS('User', sanitize_page_id($row['author']), false, true) . '#do:comments">';
+      echo $lang->get('pagetools_rc_btn_usertalk');
+      echo '</a>';
+      echo ') . . ';
+      
+      // Edit summary
+      echo '<i>(';
+      if ( empty($row['edit_summary']) )
+      {
+        echo '<span style="color: #808080;">' . $lang->get('history_summary_none_given') . '</span>';
+      }
+      else
+      {
+        echo RenderMan::parse_internal_links(htmlspecialchars($row['edit_summary']));
+      }
+      echo ')</i>';
+      
+      echo '<br />';
+    }
+    while ( $row = $db->fetchrow($q) );
+    echo '</p>';
+  }
+  
+  $template->footer();
+}
+
+function rch_get_css($change_size)
+{
+  // Hardly changed at all? Return a gray
+  if ( $change_size <= 5 && $change_size >= -5 )
+    return 'color: #808080;';
+  // determine saturation based on size of change (1-500 bytes)
+  $change_abs = abs($change_size);
+  $index = 0x70 * ( $change_abs / 500 );
+  if ( $index > 0x70 )
+    $index = 0x70;
+  $index = $index + 0x40;
+  $index = dechex($index);
+  if ( strlen($index) < 2 )
+    $index = "0$index";
+  $css = ( $change_size > 0 ) ? "color: #00{$index}00;" : "color: #{$index}0000;";
+  if ( $change_abs > 500 )
+    $css .= ' font-weight: bold;';
+  return $css;
+}
+
+?>