Index: /trunk/admin/include/languages.class.php
===================================================================
--- /trunk/admin/include/languages.class.php	(revision 9519)
+++ /trunk/admin/include/languages.class.php	(revision 9520)
@@ -33,5 +33,5 @@
   function languages($target_charset = null)
   {
-    $this->fs_languages = $this->get_fs_languages($target_charset);
+    $this->get_fs_languages($target_charset);
   }
 
@@ -48,4 +48,5 @@
     $tabsheet = new tabsheet();
     $tabsheet->add('languages_installed', l10n('Installed Languages'), $link.'languages_installed');
+    $tabsheet->add('languages_update', l10n('Check for updates'), $link.'languages_update');
     $tabsheet->add('languages_new', l10n('Add New Language'), $link.'languages_new');
     $tabsheet->select($selected);
@@ -171,4 +172,5 @@
         {
           $language = array(
+              'name'=>$file,
               'code'=>$file,
               'version'=>'0',
@@ -212,6 +214,4 @@
     closedir($dir);
     @uasort($this->fs_languages, 'name_compare');
-
-    return $this->fs_languages;
   }
 
@@ -283,4 +283,5 @@
       'version' => implode(',', $versions_to_check),
       'lang' => $user['language'],
+      'get_nb_downloads' => 'true',
       )
     );
@@ -308,8 +309,8 @@
         if (preg_match('/^.*? \[[A-Z]{2}\]$/', $language['extension_name']))
         {
-          $this->server_languages[$language['extension_name']] = $language;
-        }
-      }
-      @ksort($this->server_languages);
+          $this->server_languages[$language['extension_id']] = $language;
+        }
+      }
+      @uasort($this->server_languages, array($this, 'extension_name_compare'));
       return true;
     }
@@ -379,6 +380,9 @@
                 if ($status == 'ok')
                 {
-                  $this->fs_languages = $this->get_fs_languages();
-                  $this->perform_action('activate', $dest);
+                  $this->get_fs_languages();
+                  if ($action == 'install')
+                  {
+                    $this->perform_action('activate', $dest);
+                  }
                 }
                 if (file_exists($extract_path.'/obsolete.list')
@@ -472,4 +476,22 @@
     }
   }
+
+  /**
+   * Sort functions
+   */
+  function language_version_compare($a, $b)
+  {
+    $pattern = array('/([a-z])/ei', '/\.+/', '/\.\Z|\A\./');
+    $replacement = array( "'.'.intval('\\1', 36).'.'", '.', '');
+
+    $array = preg_replace($pattern, $replacement, array($a, $b));
+
+    return version_compare($array[0], $array[1], '>=');
+  }
+
+  function extension_name_compare($a, $b)
+  {
+    return strcmp(strtolower($a['extension_name']), strtolower($b['extension_name']));
+  }
 }
 ?>
Index: /trunk/admin/languages_update.php
===================================================================
--- /trunk/admin/languages_update.php	(revision 9520)
+++ /trunk/admin/languages_update.php	(revision 9520)
@@ -0,0 +1,133 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based photo gallery                                    |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2011 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("PHPWG_ROOT_PATH") )
+{
+  die ("Hacking attempt!");
+}
+
+include_once(PHPWG_ROOT_PATH.'admin/include/languages.class.php');
+
+$base_url = get_root_url().'admin.php?page='.$page['page'];
+
+$languages = new languages();
+
+$languages->set_tabsheet($page['page']);
+
+//-----------------------------------------------------------automatic upgrade
+if (isset($_GET['language']) and isset($_GET['revision']))
+{
+  if (!is_webmaster())
+  {
+    array_push($page['errors'], l10n('Webmaster status is required.'));
+  }
+  else
+  {
+    check_pwg_token();
+    
+    $language_id = $_GET['language'];
+    $revision = $_GET['revision'];
+
+    $upgrade_status = $languages->extract_language_files('upgrade', $revision, $language_id);
+
+    switch ($upgrade_status)
+    {
+      case 'ok':
+        array_push($page['infos'],
+           sprintf(
+              l10n('%s has been successfully upgraded.'),
+              $languages->fs_languages[$_GET['language']]['name']));
+        break;
+
+      case 'temp_path_error':
+        array_push($page['errors'], l10n('Can\'t create temporary file.'));
+        break;
+
+      case 'dl_archive_error':
+        array_push($page['errors'], l10n('Can\'t download archive.'));
+        break;
+
+      case 'archive_error':
+        array_push($page['errors'], l10n('Can\'t read or extract archive.'));
+        break;
+
+      default:
+        array_push($page['errors'],
+          sprintf(l10n('An error occured during extraction (%s).'), $upgrade_status)
+        );
+    }
+
+    $languages->languages();
+    $template->delete_compiled_templates();
+  }
+}
+
+// +-----------------------------------------------------------------------+
+// |                     start template output                             |
+// +-----------------------------------------------------------------------+
+$template->set_filenames(array('languages' => 'languages_update.tpl'));
+
+if ($languages->get_server_languages())
+{
+  foreach($languages->fs_languages as $language_id => $fs_language)
+  {
+    if (isset($fs_language['extension'])
+      and isset($languages->server_languages[$fs_language['extension']]))
+    {
+      $language_info = $languages->server_languages[$fs_language['extension']];
+
+      if (!$languages->language_version_compare($fs_language['version'], $language_info['revision_name']))
+      {
+        $url_auto_update = $base_url
+          . '&amp;revision=' . $language_info['revision_id']
+          . '&amp;language=' . $language_id
+          . '&amp;pwg_token='.get_pwg_token()
+          ;
+
+        $template->append('update_languages', array(
+          'ID' => $language_info['extension_id'],
+          'EXT_NAME' => $fs_language['name'],
+          'EXT_URL' => PEM_URL.'/extension_view.php?eid='.$language_info['extension_id'],
+          'EXT_DESC' => trim($language_info['extension_description'], " \n\r"),
+          'REV_DESC' => trim($language_info['revision_description'], " \n\r"),
+          'CURRENT_VERSION' => $fs_language['version'],
+          'NEW_VERSION' => $language_info['revision_name'],
+          'AUTHOR' => $language_info['author_name'],
+          'DOWNLOADS' => $language_info['extension_nb_downloads'],
+          'URL_UPDATE' => $url_auto_update,
+          'URL_DOWNLOAD' => $language_info['download_url'] . '&amp;origin=piwigo_download'
+          )
+        );
+      }
+    }
+  }
+}
+else
+{
+  $template->assign('SERVER_ERROR', true);
+  array_push($page['errors'], l10n('Can\'t connect to server.'));
+}
+
+$template->assign_var_from_handle('ADMIN_CONTENT', 'languages');
+?>
Index: /trunk/admin/themes/default/template/languages_update.tpl
===================================================================
--- /trunk/admin/themes/default/template/languages_update.tpl	(revision 9520)
+++ /trunk/admin/themes/default/template/languages_update.tpl	(revision 9520)
@@ -0,0 +1,62 @@
+{combine_script id='jquery.ui' load='async' require='jquery' path='themes/default/js/jquery.ui.min.js' }
+{combine_script id='jquery.ui.effects' load='async' require='jquery.ui' path='themes/default/js/ui/minified/jquery.effects.core.min.js' }
+{combine_script id='jquery.ui.effects.blind' load='async' require='jquery.ui.effects' path='themes/default/js/ui/minified/jquery.effects.blind.min.js' }
+
+{footer_script require='jquery.ui.effects.blind'}
+jQuery(document).ready(function(){ldelim}
+	jQuery("td[id^='desc_'], p[id^='revdesc_']").click(function() {ldelim}
+		id = this.id.split('_');
+		jQuery("#revdesc_"+id[1]).toggle('blind');
+    jQuery(".button_"+id[1]).toggle();
+		return false;
+	});
+});
+{/footer_script}
+
+<div class="titrePage">
+  <h2>{'Languages'|@translate}</h2>
+</div>
+
+{if not empty($update_languages)}
+<div id="availablePlugins">
+<fieldset>
+<legend>{'Languages which need upgrade'|@translate}</legend>
+{foreach from=$update_languages item=language name=languages_loop}
+<div class="pluginBox">
+  <table>
+    <tr>
+      <td class="pluginBoxNameCell">
+        {$language.EXT_NAME}
+      </td>
+      <td>
+        <a href="{$language.URL_UPDATE}" onclick="return confirm('{'Are you sure?'|@translate|@escape:javascript}');">{'Install'|@translate}</a>
+        | <a href="{$language.URL_DOWNLOAD}">{'Download'|@translate}</a>
+        | <a class="externalLink" href="{$language.EXT_URL}">{'Visit language site'|@translate}</a>
+      </td>
+    </tr>
+    <tr>
+      <td>
+        {'Version'|@translate} {$language.CURRENT_VERSION}
+      </td>
+      <td class="pluginDesc" id="desc_{$language.ID}">
+        <em>{'Downloads'|@translate}: {$language.DOWNLOADS}</em>
+        <img src="{$ROOT_URL}{$themeconf.admin_icon_dir}/plus.gif" alt="" class="button_{$language.ID}">
+        <img src="{$ROOT_URL}{$themeconf.admin_icon_dir}/minus.gif" alt="" class="button_{$language.ID}" style="display:none;">
+        {'New Version'|@translate} : {$language.NEW_VERSION}
+        | {'By %s'|@translate|@sprintf:$language.AUTHOR}
+      </td>
+    </tr>
+    <tr>
+      <td></td>
+      <td class="pluginDesc">
+        <p id="revdesc_{$language.ID}" style="display:none;">{$language.REV_DESC|htmlspecialchars|nl2br}</p>
+      </td>
+    </tr>
+  </table>
+</div>
+{/foreach}
+</fieldset>
+</div>
+{elseif not isset($SERVER_ERROR)}
+<p>{'All languages are up to date.'|@translate}</p>
+{/if}
Index: /trunk/install.php
===================================================================
--- /trunk/install.php	(revision 9519)
+++ /trunk/install.php	(revision 9520)
@@ -341,5 +341,5 @@
 
     // fill languages table
-    foreach ($languages->get_fs_languages() as $language_code => $fs_language)
+    foreach ($languages->fs_languages as $language_code => $fs_language)
     {
       $languages->perform_action('activate', $language_code);
Index: /trunk/language/en_UK/admin.lang.php
===================================================================
--- /trunk/language/en_UK/admin.lang.php	(revision 9519)
+++ /trunk/language/en_UK/admin.lang.php	(revision 9520)
@@ -771,6 +771,8 @@
 $lang['[Simulation]'] = "[Simulation]";
 $lang['Themes which need upgrade'] = 'Themes which need upgrade';
+$lang['Languages which need upgrade'] = 'Languages which need upgrade';
 $lang['All themes are up to date.'] = 'All themes are up to date.';
 $lang['All plugins are up to date.'] = 'All plugins are up to date.';
+$lang['All languages are up to date.'] = 'All languages are up to date.';
 $lang['Visit theme site'] = 'Visit theme site';
 $lang['New Version'] = 'New Version';
Index: /trunk/language/fr_FR/admin.lang.php
===================================================================
--- /trunk/language/fr_FR/admin.lang.php	(revision 9519)
+++ /trunk/language/fr_FR/admin.lang.php	(revision 9520)
@@ -782,6 +782,8 @@
 $lang['Remove from caddie'] = 'Retirer du panier';
 $lang['Themes which need upgrade'] = 'Thèmes à mettre à jour';
+$lang['Languages which need upgrade'] = 'Langues à mettre à jour';
 $lang['All themes are up to date.'] = 'Tous les thèmes sont à jour.';
 $lang['All plugins are up to date.'] = 'Tous les plugins sont à jour.';
+$lang['All languages are up to date.'] = 'Toutes les langues sont à jour.';
 $lang['Visit theme site'] = 'Visitez le site du thème';
 $lang['New Version'] = 'Nouvelle version';
