<?php

if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');

function autoupdate_check_version($version=PHPWG_VERSION)
{
  global $conf;

  if (!isset($_SESSION['need_update']))
  {
    $_SESSION['need_update'] = null;

    if (preg_match('/(\d+\.\d+)\.(\d+)/', $version, $matches)
      and @fetchRemote(PHPWG_URL.'/download/all_versions.php', $result))
    {
      $all_versions = @explode("\n", $result);
      $new_version = trim($all_versions[0]);
      $_SESSION['need_update'] = version_compare($version, $new_version, '<');
    }
  }

  if ($_SESSION['need_update'])
  {
    return l10n('A new version of Piwigo is available.').'<br>'
          . '<a href="admin.php?page=plugin&amp;section=autoupdate%2Fautoupdate.php">'.l10n('Click here to upgrade automatically').'</a>';
  }
  else
  {
    // Gallery is up to date
    // Check plugins upgrade
    include_once(PHPWG_ROOT_PATH.'admin/include/plugins.class.php');
    $plugins = new plugins();
    $ignore_list = unserialize($conf['autoupdate_ignore_list']);

    if (!isset($_SESSION['plugins_need_update']))
    {
      $_SESSION['plugins_need_update'] = null;
      autoupdate_check_plugins_upgrade($plugins, $ignore_list);
    }
    elseif (!empty($_SESSION['plugins_need_update']))
    {
      // Check if plugins have been upgraded since last check
      foreach($plugins->fs_plugins as $plugin_id => $fs_plugin)
      {
        if (isset($_SESSION['plugins_need_update'][$plugin_id])
          and $plugins->plugin_version_compare($fs_plugin['version'], $_SESSION['plugins_need_update'][$plugin_id]))
        {
          // Plugin have been updated
          autoupdate_check_plugins_upgrade($plugins, $ignore_list);
        }
      }
    }

    if (!empty($_SESSION['plugins_need_update']))
    {
      return l10n('Some upgrades are available for you plugins').'<br>'
        . '<a href="admin.php?page=plugins_update">'.l10n('Click here see upgrade plugins page').'</a>';
    }
  }

  if ($_SESSION['need_update'] === false and $_SESSION['plugins_need_update'] === array())
  {
    return l10n('Gallery and plugins are up to date');
  }
  else
  {
    return l10n('Unable to check upgrades...')
      . '<br><a href="admin.php?action=check_autoupdate">'
      . l10n('Click here to check upgrades now') . '</a>';
  }
}

function autoupdate_check_plugins_upgrade($plugins, $ignore_list)
{
  if ($plugins->get_server_plugins())
  {
    $new_ignore_list = array();
    $_SESSION['plugins_need_update'] = array();

    foreach($plugins->fs_plugins as $plugin_id => $fs_plugin)
    {
      if (isset($fs_plugin['extension']) and isset($plugins->server_plugins[$fs_plugin['extension']]))
      {
        $plugin_info = $plugins->server_plugins[$fs_plugin['extension']];

        if (!$plugins->plugin_version_compare($fs_plugin['version'], $plugin_info['revision_name']))
        {
          if (in_array($fs_plugin['name'], $ignore_list))
          {
            array_push($new_ignore_list, $fs_plugin['name']);
          }
          else
          {
            $_SESSION['plugins_need_update'][$plugin_id] = $plugin_info['revision_name'];
          }
        }
      }
    }

    // Update ignore list in database
    $query = '
UPDATE '.CONFIG_TABLE.'
SET value = "'.addslashes(serialize($new_ignore_list)).'"
WHERE param = "autoupdate_ignore_list"
;';
    pwg_query($query);
  }
}

?>