source: extensions/hotlink_compatibility/admin.php @ 16791

<?php
if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');

global $template, $page;
load_language('plugin.lang', PHPWG_PLUGINS_PATH.basename(dirname(__FILE__)).'/');

// file contents
if (!isset($conf['prefix_thumbnail'])) $conf['prefix_thumbnail'] = 'TN-';
if (!isset($conf['dir_thumbnail']))    $conf['dir_thumbnail'] = 'thumbnail';

$htaccess = PHPWG_ROOT_PATH.'/.htaccess';
$htaccess_content = '
<IfModule mod_rewrite.c>
RewriteEngine on
## redirect <2.4 thumbnails hotlinks to i.php
RewriteRule ^upload/(.*)/'.preg_quote($conf['dir_thumbnail']).'/'.preg_quote($conf['prefix_thumbnail']).'(.*)\.(jpg|jpeg|png|gif)$ i.php?/upload/$1/$2-th.$3 [NC,L]
RewriteRule ^galleries/(.*)/'.preg_quote($conf['dir_thumbnail']).'/'.preg_quote($conf['prefix_thumbnail']).'(.*)\.(jpg|jpeg|png|gif)$ i.php?/galleries/$1/$2-th.$3 [NC,L]

## redirect <2.4 high-def hotlinks to original file
RewriteRule ^upload/(.*)/pwg_high/(.*)\.(jpg|jpeg|png|gif)$ upload/$1/$2.$3 [NC,L]
RewriteRule ^galleries/(.*)/pwg_high/(.*)\.(jpg|jpeg|png|gif)$ galleries/$1/$2.$3 [NC,L]

## redirect <2.4 low-def hotlinks to i.php
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?'.preg_quote($_SERVER['SERVER_NAME']).'/.*$ [NC]
RewriteRule ^upload/(.*)/(.*)\.(jpg|jpeg|png|gif)$ i.php?/upload/$1/$2-me.$3 [NC,L]
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?'.preg_quote($_SERVER['SERVER_NAME']).'/.*$ [NC]
RewriteRule ^galleries(.*)/(.*)\.(jpg|jpeg|png|gif)$ i.php?/galleries/$1/$2-me.$3 [NC,L]
</IfModule>';


// check if the file is writable
$writable = true;
if (file_exists($htaccess))
{
  if (!is_readable($htaccess) || !is_writable($htaccess))
  {
    $writable = false;
  }
}
else
{
  $writable = is_writable(PHPWG_ROOT_PATH);
}

if (!$writable)
{
  array_push($page['errors'], l10n('.htaccess file is not writable'));
  $template->assign('FILE_ERROR', true);
  $template->assign('FILE_CONTENT', $htaccess_content);
  $template->assign('DISPLAY_DESC', true);
}
else
{
  $continue = true;
  $content = file_exists($htaccess) ? file_get_contents($htaccess) : null;

  // check if RewriteEngine off
  if (preg_match('#RewriteEngine\s+off#', $content))
  {
    array_push($page['errors'], l10n('Unable to activate RewriteEngine'));
    $template->assign('REWRITE_ERROR', true);
    $template->assign('DISPLAY_DESC', true);
    $continue = false;
  }
  
  // check if already updated
  if (strpos($content, '## redirect <2.4') !== false)
  {
    array_push($page['infos'], l10n('Upgrade already applied, please remove this plugin'));
    $template->assign('ALREADY_UPDATED', true);
    $continue = false;
  }

  if ($continue)
  {
    if (isset($_GET['init_migration']))
    {
      if (strpos($content, 'RewriteEngine on') !== false)
      {
        $htaccess_content = str_replace('RewriteEngine on', null, $htaccess_content);
      }
      
      file_put_contents($htaccess, "\n".$htaccess_content, FILE_APPEND);
      
      array_push($page['infos'], l10n('Upgrade successfully applied, please remove this plugin'));
    }
    else
    {
      // check if the host is incompatible
      if (preg_match('#free\.fr/?$#', $_SERVER['SERVER_NAME']))
      {
        array_push($page['warnings'], l10n('Your host may be incompatible with URL rewriting'));
        $template->assign('HOST_WARNING', true);
      }
      
      $template->assign('DISPLAY_DESC', true);
      $template->assign('NO_ERROR', true);
    }
  }
}

$template->assign('DESC_CONTENT', load_language('desc_content.html', PHPWG_PLUGINS_PATH.basename(dirname(__FILE__)).'/', array('return'=>true)));
$template->assign('URL_INIT', get_root_url().'admin.php?page=plugin-'.basename(dirname(__FILE__)).'&amp;init_migration');

$template->set_filename('addht_content', dirname(__FILE__).'/admin.tpl');
$template->assign_var_from_handle('ADMIN_CONTENT', 'addht_content');

?>