<?php

if (!defined('IN_WACKO'))
{
	exit;
}

$info = <<<EOD
Description:
	Loads a random page.

Usage:
	{{randompage}}

Options:
	[page="PageName"]
		page name to start from in the page hierarchy
	[test]
		show, don't redirect
EOD;

// set defaults
$help	??= 0;
$page	??= '';

if ($help)
{
	echo $this->help($info, 'randompage');
	return;
}

// do not cache random page!
$this->http->no_cache(false);

$tag	= $this->unwrap_link($page);

$query =
	'FROM ' . $this->prefix . 'page p, ' . $this->prefix . 'acl a ' .
	'WHERE p.owner_id != ' . (int) $this->db->system_user_id . ' ' .
		($tag
			? 'AND p.tag LIKE ' . $this->db->q($tag . '/%') . ' '
			: ''
		) .
		'AND p.comment_on_id = 0 ' .
		'AND p.page_id <> ' . (int) $this->page['page_id'] . ' ' .
		"AND a.privilege = 'read' " .
		"AND a.list = '*' " .
		'AND p.page_id = a.page_id ';

$count = $this->db->load_single(
	'SELECT COUNT(p.tag) AS n ' .
	$query, true);

if ($count['n'] > 1)
{
	$result = $this->db->load_single(
		'SELECT p.tag ' .
		$query .
		'LIMIT ' . Ut::rand(0, $count['n'] - 1) . ', 1'
		, true);
}

if (empty($result))
{
	$result['tag'] = $this->db->root_page;
}

if (isset($test) || $this->get_user_setting('dont_redirect') || @$_POST['redirect'] == 'no')
{
	echo $this->compose_link_to_page($result['tag']);
}
else
{
	$this->http->redirect($this->href('', $result['tag']));
}
