<?php

/*

 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between

 * upgrade.php - upgrade script

 * 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.

 */

define('IN_ENANO_INSTALL', 'true');

define('IN_ENANO_UPGRADE', 'true');

if(!defined('scriptPath')) {

  $sp = dirname($_SERVER['REQUEST_URI']);

  if($sp == '/' || $sp == '\\') $sp = '';

  define('scriptPath', $sp);

}

if(!defined('contentPath')) {

  $sp = dirname($_SERVER['REQUEST_URI']);

  if($sp == '/' || $sp == '\\') $sp = '';

  define('contentPath', $sp);

}

global $this_page, $sideinfo;

function microtime_float()

{

  list($usec, $sec) = explode(" ", microtime());

  return ((float)$usec + (float)$sec);

}

global $_starttime;

$_starttime = microtime_float();

// Determine directory (special case for development servers)

if ( strpos(__FILE__, '/repo/') && file_exists('.enanodev') )

{

  $filename = str_replace('/repo/', '/', __FILE__);

}

else

{

  $filename = __FILE__;

}

define('ENANO_ROOT', dirname($filename));

require(ENANO_ROOT.'/includes/constants.php');

if(defined('ENANO_DEBUG'))

{

  require_once(ENANO_ROOT.'/includes/debugger/debugConsole.php');

}

else

{

  function dc_here($m)     { return false; }

  function dc_dump($a, $g) { return false; }

  function dc_watch($n)    { return false; }

  function dc_start_timer($u) { return false; }

  function dc_stop_timer($m) { return false; }

}

// SCRIPT CONFIGURATION

// Everything related to versions goes here!

// Valid versions to upgrade from

// Basically a list of dependencies, which should be resolved automatically

// If, for example, upgrading from 1.0b1 to 1.0RC1 requires one extra query that would not

// normally be required (for whatever reason) then you would add a custom version number to the array under key '1.0b1'.

$deps_list = Array(

    '1.0b1' => Array('1.0b2'),

    '1.0b2' => Array('1.0b3'),

    '1.0b3' => Array('1.0b4'),

    '1.0b4' => Array('1.0RC1'),

    '1.0RC1' => Array('1.0RC2'),

    '1.0RC2' => Array('1.0RC3'),

    '1.0RC3' => Array('1.0'),

    '1.0' => Array('1.0.1'),

    '1.0.1' => Array('1.0.1.1'),

    '1.0.1.1' => Array('1.0.2b1'),

    '1.0.2b1' => Array('1.0.2'),

    '1.0.2' => Array('1.0.3'),

  );

$func_list = Array(

    '1.0' => Array('u_1_0_1_update_del_votes'),

    '1.0b4' => Array('u_1_0_RC1_update_user_ids', 'u_1_0_RC1_add_admins_to_group', 'u_1_0_RC1_alter_files_table', 'u_1_0_RC1_destroy_session_cookie', 'u_1_0_RC1_set_contact_email', 'u_1_0_RC1_update_page_text'), // ,

    // '1.0RC2' => Array('u_1_0_populate_userpage_comments')

    '1.0RC3' => Array('u_1_0_RC3_make_users_extra'),

    '1.0.2b1' => Array('u_1_0_2_nuke_template_cache', 'u_1_0_2_rebuild_search_index')

  );

if(!isset($_GET['mode'])) 

{

  $_GET['mode'] = 'login';

}

function err($t)

{

  global $template;

  echo $t;

  $template->footer(); 

  exit;

}

require(ENANO_ROOT.'/includes/template.php');

// Initialize the session manager

require(ENANO_ROOT.'/includes/functions.php');

require(ENANO_ROOT.'/includes/dbal.php');

require(ENANO_ROOT.'/includes/paths.php');

require(ENANO_ROOT.'/includes/sessions.php');

require(ENANO_ROOT.'/includes/plugins.php');

require(ENANO_ROOT.'/includes/rijndael.php');

require(ENANO_ROOT.'/includes/render.php');

require(ENANO_ROOT.'/includes/search.php');

$db = new mysql();

$db->connect();

$plugins = new pluginLoader();

if(!defined('ENANO_CONFIG_FETCHED'))

{

  // Select and fetch the site configuration

  $e = $db->sql_query('SELECT config_name, config_value FROM '.table_prefix.'config;');

  if ( !$e )

  {

    $db->_die('Some critical configuration information could not be selected.');

  }

  else

  {

    define('ENANO_CONFIG_FETCHED', ''); // Used in die_semicritical to figure out whether to call getConfig() or not

  }

  $enano_config = Array();

  while($r = $db->fetchrow())

  {

    $enano_config[$r['config_name']] = $r['config_value'];

  }

  $db->free_result();

}

$v = enano_version();

if(in_array($v, Array(false, '', '1.0b3', '1.0b4')))

{

  $ul_admin  = 2;

  $ul_mod    = 1;

  $ul_member = 0;

  $ul_guest  = -1;

}

else

{

  $ul_admin  = USER_LEVEL_ADMIN;

  $ul_mod    = USER_LEVEL_MOD;

  $ul_member = USER_LEVEL_MEMBER;

  $ul_guest  = USER_LEVEL_GUEST;

}

$_GET['title'] = 'unset';

$session = new sessionManager();

$paths = new pathManager();

$session->start();

$template = new template_nodb();

$template->load_theme('oxygen', 'bleu', false);

$modestrings = Array(

              'login'      => 'Administrative login',

              'welcome'    => 'Welcome',

              'setversion' => 'Select Enano version',

              'confirm'    => 'Confirm upgrade',

              'upgrade'    => 'Database installation',

              'finish'     => 'Upgrade complete'

            );

$sideinfo = '';

$vars = $template->extract_vars('elements.tpl');

$p = $template->makeParserText($vars['sidebar_button']);

foreach ( $modestrings as $id => $str )

{

  if ( $_GET['mode'] == $id )

  {

    $flags = 'style="font-weight: bold; text-decoration: underline;"';

    $this_page = $str;

  }

  else

  {

    $flags = '';

  }

  $p->assign_vars(Array(

      'HREF' => '#',

      'FLAGS' => $flags . ' onclick="return false;"',

      'TEXT' => $str

    ));

  $sideinfo .= $p->run();

}

$template->init_vars();

function upg_assign_vars($schema)

{

  $schema = str_replace('{{SITE_NAME}}',   mysql_real_escape_string(getConfig('site_name')), $schema);

  $schema = str_replace('{{SITE_DESC}}',   mysql_real_escape_string(getConfig('site_desc')), $schema);

  $schema = str_replace('{{COPYRIGHT}}',   mysql_real_escape_string(getConfig('copyright_notice')), $schema);

  $schema = str_replace('{{TABLE_PREFIX}}', table_prefix, $schema);

  if(getConfig('wiki_mode')=='1') $schema = str_replace('{{WIKI_MODE}}', '1', $schema);

  else $schema = str_replace('{{WIKI_MODE}}', '0', $schema);

  return $schema;

}

/* Version-specific functions */

function u_1_0_RC1_update_user_ids()

{

  global $db;

  // First, make sure this hasn't already been done

  $q = $db->sql_query('SELECT username FROM '.table_prefix.'users WHERE user_id=1;');

  if ( !$q )

    $db->_die();

  $row = $db->fetchrow();

  if ( $row['username'] == 'Anonymous' )

    return true;

  // Find the first unused user ID

  $used = Array();

  $q = $db->sql_query('SELECT user_id FROM '.table_prefix.'users;');

  if ( !$q )

    $db->_die();

  $notfirst = false;

  while ( $row = $db->fetchrow() )

  {

    $i = intval($row['user_id']);

    $used[$i] = true;

    if ( !isset($used[$i - 1]) && $notfirst )

    {

      $id = $i - 1;

      break;

    }

    $notfirst = true;

  }

  if ( !isset($id) )

    $id = $i + 1;

  if ( $id == 0 )

    $id = 2;

  $db->free_result();

  $q = $db->sql_query('UPDATE '.table_prefix.'users SET user_id=' . $id . ' WHERE user_id=1;');

  if(!$q)

    $db->_die();

  $q = $db->sql_query('UPDATE '.table_prefix.'users SET user_id=1 WHERE user_id=-1 AND username=\'Anonymous\';');

  if(!$q)

    $db->_die();

}

function u_1_0_RC1_add_admins_to_group()

{

  global $db;

  $q = $db->sql_query('SELECT user_id FROM '.table_prefix.'users WHERE user_level=' . USER_LEVEL_ADMIN . ';');

  if ( !$q )

    $db->_die();

  $base = 'INSERT INTO '.table_prefix.'group_members(group_id,user_id) VALUES';

  $blocks = Array();

  while ( $row = $db->fetchrow($q) )

  {

    $blocks[] = '(2,' . $row['user_id'] . ')';

  }

  $blocks = implode(',', $blocks);

  $sql = $base . $blocks . ';';

  if(!$db->sql_query($sql))

    $db->_die();

}

function u_1_0_RC1_alter_files_table()

{

  global $db;

  if(!is_dir(ENANO_ROOT.'/files'))

    @mkdir(ENANO_ROOT . '/files');

  if(!is_dir(ENANO_ROOT.'/files'))

    die('ERROR: Couldn\'t create files directory');

  $q = $db->sql_unbuffered_query('SELECT * FROM '.table_prefix.'files;', $db->_conn);

  if(!$q) $db->_die();

  while ( $row = $db->fetchrow() )

  {

    $file_data = base64_decode($row['data']);

    $path = ENANO_ROOT . '/files/' . md5( $row['filename'] . '_' . $file_data ) . '_' . $row['time_id'] . $row['file_extension'];

    @unlink($path);

    $handle = @fopen($path, 'w');

    if(!$handle)

      die('fopen failed');

    fwrite($handle, $file_data);

    fclose($handle);

  }

  $q = $db->sql_query('ALTER TABLE '.table_prefix.'files DROP PRIMARY KEY, ADD COLUMN file_id int(12) NOT NULL auto_increment FIRST, ADD PRIMARY KEY (file_id), ADD COLUMN file_key varchar(32) NOT NULL;');

  if(!$q) $db->_die();

  $list = Array();

  $q = $db->sql_unbuffered_query('SELECT * FROM '.table_prefix.'files;', $db->_conn);

  if(!$q) $db->_die();

  while ( $row = $db->fetchrow($q) )

  {

    $file_data = base64_decode($row['data']);

    $key = md5( $row['filename'] . '_' . $file_data );

    $list[] = 'UPDATE '.table_prefix.'files SET file_key=\'' . $key . '\' WHERE file_id=' . $row['file_id'] . ';';

  }

  foreach ( $list as $sql )

  {

    if(!$db->sql_query($sql)) $db->_die();

  }

  if(!$db->sql_query('ALTER TABLE '.table_prefix.'files DROP data')) $db->_die();

}

function u_1_0_RC1_destroy_session_cookie()

{

  unset($_COOKIE['sid']);

  setcookie('sid', '', time()-3600*24, scriptPath);

  setcookie('sid', '', time()-3600*24, scriptPath.'/');

}

function u_1_0_RC1_set_contact_email()

{

  global $db;

  $q = $db->sql_query('SELECT email FROM '.table_prefix.'users WHERE user_level='.USER_LEVEL_ADMIN.' ORDER BY user_level ASC LIMIT 1;');

  if(!$q)

    $db->_die();

  $row = $db->fetchrow();

  setConfig('contact_email', $row['email']);

}

function u_1_0_RC1_update_page_text()

{

  global $db;

  $q = $db->sql_unbuffered_query('SELECT page_id,namespace,page_text,char_tag FROM '.table_prefix.'page_text');

  if (!$q)

    $db->_die();

  $qs = array();

  while ( $row = $db->fetchrow($q) )

  {

    $row['page_text'] = str_replace(Array(

      "{QUOT:{$row['char_tag']}}",

      "{APOS:{$row['char_tag']}}",

      "{SLASH:{$row['char_tag']}}"

      ), Array(

      '"', "'", '\\'

      ), $row['page_text']);

    $qs[] = 'UPDATE '.table_prefix.'page_text SET page_text=\'' . mysql_real_escape_string($row['page_text']) . '\'

      WHERE page_id=\'' . mysql_real_escape_string($row['page_id']) . '\' AND

            namespace=\'' . mysql_real_escape_string($row['namespace']) . '\';';

  }

  foreach($qs as $query)

  {

    if(!$db->sql_query($query))

      $db->_die();

  }

}

function u_1_0_1_update_del_votes()

{

  global $db;

  $q = $db->sql_query('SELECT urlname, namespace, delvote_ips FROM '.table_prefix.'pages;');

  if ( !$q )

    $db->_die();

  while ( $row = $db->fetchrow($q) )

  {

    $ips = strval($row['delvote_ips']);

    if ( is_array( @unserialize($ips) ) )

      continue;

    $ips = explode('|', $ips);

    $new = array(

      'ip' => array(),

      'u' => array()

      );

    $i = 0;

    $prev = '';

    $prev_is_ip = false;

    foreach ( $ips as $ip )

    {

      $i++;

      $current_is_ip = is_valid_ip($ip);

      if ( $current_is_ip && $prev_is_ip )

      {

        $i++;

        $new['u'][] = $prev;

      }

      if ( $current_is_ip )

      {

        $new['ip'][] = $ip;

      }

      else

      {

        $new['u'][] = $ip;

      }

      $prev = $ip;

      $prev_is_ip = $current_is_ip;

    }

    if ( $i % 2 == 1 && $prev_is_ip )

    {

      $new['u'][] = $ip;

    }

    $new = serialize($new);

    $e = $db->sql_query('UPDATE '.table_prefix.'pages SET delvote_ips=\'' . $db->escape($new) . '\' WHERE urlname=\'' . $db->escape($row['urlname']) . '\' AND namespace=\'' . $db->escape($row['namespace']) . '\';');

    if ( !$e )

      $db->_die();

  }

  $db->free_result($q);

}

function u_1_0_RC3_make_users_extra()

{

  global $db;

  $q = $db->sql_query('SELECT user_id FROM '.table_prefix.'users WHERE user_id > 0;');

  if ( !$q )

    $db->_die();

  $ids = array();

  while ( $row = $db->fetchrow() )

  {

    $ids[] = intval($row['user_id']);

  }

  $ids = '(' . implode('),(', $ids) . ')';

  if ( $ids == '' )

    return false;

  $sql = "INSERT INTO " . table_prefix . "users_extra(user_id) VALUES$ids;";

  if ( !$db->sql_query($sql) )

    $db->_die();

}

function u_1_0_2_nuke_template_cache()

{

  $dir = @opendir(ENANO_ROOT . '/cache');

  if ( !$dir )

  {

    return false;

  }

  while ( ($fname = @readdir($dir)) )

  {

    if ( preg_match('/\.tpl\.php$/', $fname) )

    {

      unlink( ENANO_ROOT . '/cache/' . $fname );

    }

  }

}

function u_1_0_2_rebuild_search_index()

{

  global $paths;

  @set_time_limit(0);

  $paths->rebuild_search_index();

}

switch($_GET['mode'])

{

  case "login":

    if ( $session->user_logged_in && $session->user_level < $ul_admin )

    {

      $template->header();

      echo '<p>Your user account does not have permission to perform an upgrade of Enano. Return to the <a href="index.php">index page</a>.</p>';

      $template->footer();

      exit;

    }

    if($session->user_logged_in && $session->user_level >= $ul_admin)

    {

      if(isset($_POST['login']))

      {

        $session->login_without_crypto($_POST['username'], $_POST['password'], false, $ul_admin);

        if($session->sid_super)

        {

          header('Location: upgrade.php?mode=welcome&auth='.$session->sid_super);

          exit;

        }

      }

      $template->header();

      ?>

      <form action="upgrade.php?mode=login" method="post">

      <table border="0" style="margin-left: auto; margin-right: auto; margin-top: 5px;" cellspacing="1" cellpadding="4">

        <tr>

          <th colspan="2">You must re-authenticate to perform this upgrade.</th>

        </tr>

        <?php

        if(isset($_POST['login']))

        {

          echo '<tr><td colspan="2"><p style="color: red;">Login failed. Bad password?</p></td></tr>';

        }

        ?>

        <tr>

          <td>Username:</td><td><input type="text" name="username" size="30" /></td>

        </tr>

        <tr>

          <td>Password:</td><td><input type="password" name="password" size="30" /></td>

        </tr>

        <tr>

          <td colspan="2" style="text-align: center;"><input type="submit" name="login" value="Log in" />

        </tr>