<?php

/**
 * @package tikiwiki
 */

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

require_once('tiki-setup.php');

if (isset($_SERVER['HTTP_REFERER'])) {
    $orig_url = $_SERVER['HTTP_REFERER'];
} else {
    $orig_url = $prefs['tikiIndex'];
}

if ($prefs['feature_sefurl'] == 'y' && ! strstr($orig_url, '.php') && ! preg_match('/article[0-9]+$/', $orig_url)) {
    $orig_url = preg_replace('#\/([^\/]+)$#', '/tiki-index.php?page=$1', $orig_url);
}

// Handle form processing
if (isset($_REQUEST["emulategroups"])) {
    if ($_REQUEST["emulategroups"] == "setgroups") {
        // User has selected a list of groups to emulate
        $_SESSION["groups_are_emulated"] = "y";
        if (count($_REQUEST["switchgroups"])) {
            $groups_emulated = [];
            $dont_forget_registered = 0;
            foreach ($_REQUEST["switchgroups"] as $value) {
                $groups_emulated[] = $value;
                $included = $tikilib->get_included_groups($value);
                $groups_emulated = array_merge($groups_emulated, $included);
                // If one is member of a group different from Anonymous or Registered
                // then one automatically has the rights of group "Registered"
                if ($value != "Registered" && $value != "Anonymous") {
                    $dont_forget_registered = 1;
                }
            }
            if ($dont_forget_registered == 1 && isset($user)) {
                $groups_emulated[] = "Registered";
                $included = $tikilib->get_included_groups("Registered");
                $groups_emulated = array_merge($groups_emulated, $included);
            }
            $groups_emulated = array_unique($groups_emulated);
        } else {
            // Let's say clicking with nothing selected is the same as reset
            // Saying it's the same as Anonymous would have the disadvantage of probably
            // hiding the module, so the user would need to logout
            $_SESSION["groups_are_emulated"] = "n";
            $groups_emulated = [];
            $_SESSION['groups_emulated'] = serialize($groups_emulated);
        }
        $_SESSION['groups_emulated'] = serialize($groups_emulated);
    } elseif ($_REQUEST["emulategroups"] == "resetgroups") {
        // User stops groups emulation (logging out is an alternate solution for user)
        $_SESSION["groups_are_emulated"] = "n";
        $groups_emulated = [];
        $_SESSION['groups_emulated'] = serialize($groups_emulated);
    }
    $tikilib->invalidate_usergroups_cache($user);
}
$smarty->assign('groups_are_emulated', $_SESSION["groups_are_emulated"]);
$smarty->assign_by_ref('groups_emulated', unserialize($_SESSION['groups_emulated']));

header("location: $orig_url");
exit;