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<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based photo gallery                                    |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2016 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/updates.class.php');
include_once(PHPWG_ROOT_PATH.'admin/include/pclzip.lib.php');

/*
STEP:
0 = check is needed. If version is latest or check fail, we stay on step 0
1 = new version on same branch AND new branch are available => user may choose upgrade.
2 = upgrade on same branch
3 = upgrade on different branch
*/
$step = isset($_GET['step']) ? $_GET['step'] : 0;
$upgrade_to = isset($_GET['to']) ? $_GET['to'] : '';

// +-----------------------------------------------------------------------+
// |                                Step 0                                 |
// +-----------------------------------------------------------------------+
if ($step == 0)
{
  $template->assign(array(
    'CHECK_VERSION' => false,
    'DEV_VERSION' => false,
    )
  );

  if (preg_match('/(\d+\.\d+)\.(\d+)/', PHPWG_VERSION, $matches))
  {
    $url = PHPWG_URL.'/download/all_versions.php';
    $url .= '?rand='.md5(uniqid(rand(), true)); // Avoid server cache

    if (@fetchRemote($url, $result)
      and $all_versions = @explode("\n", $result)
      and is_array($all_versions))
    {
      $template->assign('CHECK_VERSION', true);

      $last_version = trim($all_versions[0]);
      $upgrade_to = $last_version;

      if (version_compare(PHPWG_VERSION, $last_version, '<'))
      {
        $new_branch = preg_replace('/(\d+\.\d+)\.\d+/', '$1', $last_version);
        $actual_branch = $matches[1];

        if ($new_branch == $actual_branch)
        {
          $step = 2;
        }
        else
        {
          $step = 3;

          // Check if new version exists in same branch
          foreach ($all_versions as $version)
          {
            $new_branch = preg_replace('/(\d+\.\d+)\.\d+/', '$1', $version);

            if ($new_branch == $actual_branch)
            {
              if (version_compare(PHPWG_VERSION, $version, '<'))
              {
                $step = 1;
              }
              break;
            }
          }
        }
      }
    }
  }
  else
  {
    $template->assign('DEV_VERSION', true);
  }
}

// +-----------------------------------------------------------------------+
// |                                Step 1                                 |
// +-----------------------------------------------------------------------+
if ($step == 1)
{
  $template->assign(array(
    'MINOR_VERSION' => $version,
    'MAJOR_VERSION' => $last_version,
    )
  );
}

// +-----------------------------------------------------------------------+
// |                                Step 2                                 |
// +-----------------------------------------------------------------------+
if ($step == 2 and is_webmaster())
{
  if (isset($_POST['submit']) and isset($_POST['upgrade_to']))
  {
    updates::upgrade_to($_POST['upgrade_to'], $step);
  }
}

// +-----------------------------------------------------------------------+
// |                                Step 3                                 |
// +-----------------------------------------------------------------------+
if ($step == 3 and is_webmaster())
{
  if (isset($_POST['dumpDatabase']))
  {
    updates::dump_database(isset($_POST['includeHistory']));
  }

  if (isset($_POST['submit']) and isset($_POST['upgrade_to']))
  {
    updates::upgrade_to($_POST['upgrade_to'], $step);
  }

  $updates = new updates();
  $updates->get_merged_extensions($upgrade_to);
  $updates->get_server_extensions($upgrade_to);
  $template->assign('missing', $updates->missing);
}

// +-----------------------------------------------------------------------+
// |                        Process template                               |
// +-----------------------------------------------------------------------+

if (!is_webmaster())
{
  $page['errors'][] = l10n('Webmaster status is required.');
}

$template->assign(array(
  'STEP'          => $step,
  'PHPWG_VERSION' => PHPWG_VERSION,
  'UPGRADE_TO'    => $upgrade_to,
  'RELEASE_URL'   => PHPWG_URL.'/releases/'.$upgrade_to,
  )
);

$template->set_filename('plugin_admin_content', 'updates_pwg.tpl');
$template->assign_var_from_handle('ADMIN_CONTENT', 'plugin_admin_content');

?>