<?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.
// $Id$

/**
 * Class that contains helpers functions for wiki plugins
 */
class WikiPlugin_Helper
{
    /**
     * Check if analytics code should be used.
     * If $user is anonymous the analytics is always displayed.
     *
     * @param array $prefs
     * @return boolean
     */
    public static function showAnalyticsCode($prefs)
    {
        global $user;

        if ($user && ! empty($prefs['group_option'])) {
            if ($prefs['group_option'] == 'included' && empty($prefs['groups'])) {
                return true;
            }

            if ($prefs['group_option'] == 'excluded' && empty($prefs['groups'])) {
                return false;
            }

            $userlib = TikiLib::lib('user');
            $userGroups = $userlib->get_user_groups($user);
            $availableGroups = explode(',', $prefs['groups']);
            $validGroups = array_intersect($userGroups, $availableGroups);

            if (
                ($prefs['group_option'] == 'included' && empty($validGroups)) ||
                ($prefs['group_option'] == 'excluded' && ! empty($validGroups))
            ) {
                return false;
            }
        }

        return true;
    }
}