<?php

/*

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

 * Version 1.0 (Banshee)

 * 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');   

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 $_starttime, $this_page, $sideinfo;

$_starttime = microtime(true);

define('ENANO_ROOT', dirname(__FILE__));

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

$valid_versions = Array('1.0b1', '1.0b2', '1.0b3', '1.0b4', '1.0RC1', '1.0RC2');

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

// If, for example, if 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')

  );

$this_version   = '1.0';

$func_list = Array(

    '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')

  );

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');

$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();

  $c = false;

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

  {

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

    $used[$i] = true;

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

    {

      $id = $i - 1;

      break;

    }

    $c = true;

  }

  if ( !isset($id) )

    $id = $i + 1;

  $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_populate_userpage_comments()

{

  global $db;

  $q = $db->sql_query('SELECT COUNT(c.comment_id) AS num_comments...');

  if ( !$q )

    $db->_die();

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

  {

  }

}

switch($_GET['mode'])

{

  case "login":

    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>

      </table>

      </form>

      <?php

    }

    else

    {

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

      {

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

        if($result == 'success')

        {

          header('Location: upgrade.php');

          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">Please log in to continue with 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>

      </table>

      </form>

      <?php

    }

    break;

  case "welcome":

    if(!$session->sid_super) { $template->header(); echo '<p>No admin session found! Please <a href="upgrade.php">restart the upgrade</a>.</p>'; $template->footer(); exit; }

    // Just show a simple welcome page to display version information

    $template->header();

    require('config.php');

    ?>

    <div style="text-align: center; margin-top: 10px;">

      <img alt="[ Enano CMS Project logo ]" src="images/enano-artwork/installer-greeting-blue.png" style="display: block; margin: 0 auto; padding-left: 134px;" />

      <h2>Welcome to the Enano upgrade wizard</h2>

      <?php

      if ( file_exists('./_nightly.php') )

      {

        echo '<div class="warning-box" style="text-align: left; margin: 10px auto; display: table; width: 60%;"><b>You are about to upgrade to a NIGHTLY BUILD of Enano.</b><br />Nightly builds CANNOT be re-upgraded to the final release. They may also contain serious flaws, security problems, or extraneous debugging information. Continuing this process on a production site is NOT recommended.</div>';

      }

      ?>

    </div>

    <div style="display: table; margin: 0 auto;">

      <p>You are about to upgrade Enano to version <b><?php echo $this_version; ?></b>. Before you continue, please ensure that:</p>

      <ul>

        <li>You have completely backed up your database (<b><?php echo "$dbhost:$dbname"; ?></b>)</li>

        <li>You have backed up the entire Enano directory (<b><?php echo ENANO_ROOT; ?></b>)</li>

        <li>You have reviewed the release notes for this version, and you<br />are comfortable with any known bugs or issues</li>

      </ul>

    </div>

    <div style="text-align: center; margin-top: 10px;">

      <form action="upgrade.php?mode=setversion&amp;auth=<?php echo $session->sid_super; ?>" method="post">

        <input type="submit" value="Continue with upgrade" />

      </form>

    </div>

    <?php

    break;

  case "setversion":

    if(!$session->sid_super) { $template->header(); echo '<p>No admin session found! Please <a href="upgrade.php">restart the upgrade</a>.</p>'; $template->footer(); exit; }

    $v = ( function_exists('enano_version') ) ? enano_version() : '';

    if(!in_array($v, $valid_versions) && $v != '')

    {

      $template->header();

      ?>

      <p>Your version of Enano (<?php echo $v; ?>) can't be upgraded to this version (<?php echo $this_version; ?>).</p>

      <?php

      break;

    } elseif($v == '') {

      // OK, we don't know which version he's running. So we'll cheat ;-)

      $template->header();

      echo "<form action='upgrade.php?mode=confirm&amp;auth={$session->sid_super}' method='post'>";

      ?>

      <p>Sorry, we couldn't detect which version of Enano you're running on your server. Please select which version of Enano you have below, and make absolutely sure that you're correct.</p>

      <p><select name="version"><?php

        foreach($valid_versions as $c)

        {

          echo "<option value='{$c}'>{$c}</option>";

        }

      ?></select></p>

      <p>

        <input type="submit" value="Continue" />

      </p>

      <?php

      echo `</form>`;

      break;

    } else {

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

    }

    break;

  case "confirm":

    $enano_version = ( isset($_POST['version']) ) ? $_POST['version'] : enano_version();

    $template->header();

    if(!$session->sid_super) { echo '<p>No admin session found! Please <a href="upgrade.php">restart the upgrade</a>.</p>'; $template->footer(); exit; }

    ?>

      <form action="upgrade.php?mode=upgrade&amp;auth=<?php echo $session->sid_super; ?>" method="post">

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

          <tr>

            <td colspan="2"><p><b>Are you sure you want to perform this upgrade?</b></p><p>You can still cancel the upgrade process now. If<br />the upgrade fails, you will need to roll back<br />any actions made using manual SQL queries.</p><p><b>Please clear your browser cache or<br />shift-reload after the upgrade.</b><br />If you fail to do so, some page elements may<br />be broken.</td>

          </tr>

          <tr>

            <td colspan="2" style="text-align: center;">

              <input type="hidden" name="enano_version" value="<?php echo $enano_version; ?>" />

              <input type="submit" name="doit" value="Upgrade Enano!" />

            </td>

          </tr>

        </table>

      </form>

    <?php

    break;

  case "upgrade":

    $template->header();

    if(!$session->sid_super) { echo '<p>No admin session found! Please <a href="upgrade.php">restart the upgrade</a>.</p>'; $template->footer(); exit; }

    if(!isset($_POST['enano_version'])) { echo '<p>Can\'t find the version information on the POST query, are you trying to do this upgrade directly? Please <a href="upgrade.php">restart the upgrade</a>.</p>'; break; }

    $enano_version = $_POST['enano_version'];

    echo '<p>Preparing for schema execution...';

      // Build an array of queries

      $schema = file_get_contents('upgrade.sql');

      // Strip out and process version blocks