<?php

// (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');
$histlib = TikiLib::lib('hist');
$wikilib = TikiLib::lib('wiki');

$access->check_feature('feature_wiki');

// Get the page from the request var or default it to HomePage
if (! isset($_REQUEST["page"])) {
    $smarty->assign('msg', tra("No page indicated"));
    $smarty->display("error.tpl");
    die;
} else {
    $page = $_REQUEST["page"];
    $smarty->assign_by_ref('page', $_REQUEST["page"]);
}
if (! isset($_REQUEST["version"])) {
    $smarty->assign('msg', tra("No version indicated"));
    $smarty->display("error.tpl");
    die;
} else {
    $version = $_REQUEST["version"];
    $smarty->assign_by_ref('version', $_REQUEST["version"]);
}
if (! ($info = $tikilib->get_page_info($page))) {
    // First, try cleaning the url to see if it matches an existing page.
    $wikilib->clean_url_suffix_and_redirect($page, $type = '', $path = '', $prefix = '');

    // If after cleaning the url, the page does not exist then display an error
    $smarty->assign('msg', tra('Page cannot be found'));
    $smarty->display('error.tpl');
    die;
}
if (! $histlib->version_exists($page, $version)) {
    $smarty->assign('msg', tra("Non-existent version"));
    $smarty->display("error.tpl");
    die;
}

$tikilib->get_perm_object($page, 'wiki page', $info);
$access->check_permission(['tiki_p_rollback', 'tiki_p_edit']);

if (isset($_REQUEST["rollback"])) {
    $access->checkCsrf(tr('Are you sure you want to roll back "%0" to version #%1?', $page, $version));

    $comment = $_REQUEST["comment"];
    $histlib->use_version($page, $version, $comment);
    $tikilib->invalidate_cache($page);

    header("location: tiki-index.php?page=" . urlencode($page));
    die;
}
$version = $histlib->get_version($page, $version);
$version["data"] = TikiLib::lib('parser')->parse_data($version["data"], ['preview_mode' => true, 'is_html' => $version['is_html']]);
$smarty->assign_by_ref('preview', $version);
// disallow robots to index page:
$smarty->assign('metatag_robots', 'NOINDEX, NOFOLLOW');
$smarty->assign('mid', 'tiki-rollback.tpl');
$smarty->display("tiki.tpl");