<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based picture gallery                                  |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2009 Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU General Public License as published by  |
// | the Free Software Foundation                                          |
// |                                                                       |
// | 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 more details.                              |
// |                                                                       |
// | You should have received a copy of the GNU General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+
if (!defined('LANGUAGE_SWITCH_PATH'))
define('LANGUAGE_SWITCH_PATH' , PHPWG_PLUGINS_PATH . basename(dirname(__FILE__)) . '/');
class language_controler {
  static public function _switch()
  {
    global $user;
    if (!defined('PHPWG_ROOT_PATH')) { die('Hacking attempt!'); }
    $same = $user['language'];
    if ( isset( $_GET['lang']) ) {
      if ( !empty($_GET['lang'] ) and file_exists( PHPWG_ROOT_PATH.'language/'
        . $_GET['lang'].'/common.lang.php') ) {
        if (is_a_guest() or is_generic()) {
          pwg_set_session_var( 'lang_switch', $_GET['lang'] );
        } else {
          $query = 'UPDATE '.USER_INFOS_TABLE.'
          SET language = \''.$_GET['lang'].'\'
          WHERE user_id = '.$user['id'].'
          ;';
          pwg_query($query);
        }
        $user['language'] = $_GET['lang'];
      }
    }
    elseif ((is_a_guest() or is_generic())) {
      $user['language'] = pwg_get_session_var( 'lang_switch', $user['language'] );
    }
  // Reload language only if it isn't the same one
    if ( $same !== $user['language']) {
      load_language('common.lang', '', array('language'=>$user['language']) );
      load_language('local.lang', '', array('language'=>$user['language'], 'no_fallback'=>true) );
      if (defined('IN_ADMIN') and IN_ADMIN) { // Never currently
        load_language('admin.lang', '', array('language'=>$user['language']) );
      }
    }
  }
  static public function _flags()
  {
    global $user, $template, $conf;
    $available_lang = get_languages();
    if ( isset($conf['no_flag_languages']) ) 
      $available_lang = array_diff_key($available_lang, array_flip($conf['no_flag_languages']));
    $url_starting = $_SERVER['REQUEST_URI'];
    if ( isset( $_GET['lang']) ) {
      $pos = stripos  ( $url_starting  , '&lang=' );
      if (is_numeric($pos) and $pos > 0) $url_starting = substr($url_starting, 0, $pos);
    }
    $pos = stripos($url_starting, script_basename());
    if (is_numeric($pos)) $url_starting = substr($url_starting, $pos);
    foreach ( $available_lang as $code => $displayname ) {
      $qlc = array ( 
        'url' => add_url_params( $url_starting, array('lang'=> $code) ),
        'alt' => ucwords( $displayname ),
        'img' => 'plugins/language_switch/icons/' . $code . '.jpg',
        );
      if ( $code !== $user['language'] and file_exists(PHPWG_ROOT_PATH.$qlc['img']) ) 
        $lsw['flags'][$code] = $qlc ;
      else $lsw['Active'] = $qlc;
    }
    $template->set_filename('language_flags', dirname(__FILE__) . '/flags.tpl');
    $lsw['side'] = ceil(sqrt(count($available_lang)));
    $template->assign(array(
      'lang_switch'=> $lsw,
      'LANGUAGE_SWITCH_PATH' => LANGUAGE_SWITCH_PATH,
    ));
    $flags = $template->parse('language_flags',true);
    $template->clear_assign('lang_switch');
    $template->concat( 'PLUGIN_INDEX_ACTIONS', $flags);
    // TODO : Try to cache $flags and $user['language'] in $_SESSION for performance
  }
}
  /* {html_head} usage function */
  /* See flags.tpl for example (due no catenation available) */
if (!function_exists('Componant_exists')) {
  function Componant_exists($path, $file)
    { return file_exists( $path . $file); }
}

?>