<?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.
// $Id$

function wikiplugin_randominclude_info()
{
    return [
        'name' => tra('Random Include'),
        'documentation' => 'PluginRandomInclude',
        'description' => tra('Include a random page\'s content.'),
        'prefs' => ['wikiplugin_randominclude'],
        'iconname' => 'merge',
        'introduced' => 6,
        'params' => [],
    ];
}

function wikiplugin_randominclude($data, $params)
{
    global $user, $page;
    $userlib = TikiLib::lib('user');
    $tikilib = TikiLib::lib('tiki');
    static $included_pages, $data;

    $params = [$page];
    $query = 'SELECT count(*) AS `max` FROM `tiki_pages` WHERE `pageName`!=?';
    $cant = $tikilib->getOne($query, $params);
    if ($cant) {
        $pick = mt_rand(0, $cant - 1);

        $query = 'select `pageName` from `tiki_pages` WHERE `pageName`!=?';
        $incpage = $tikilib->getOne($query, $params, 1, $pick);
        if (isset($included_pages[$incpage])) {
            return ''; //don't include random pages into random pages
        }
    } else {
        return '';
    }

    $included_pages[$incpage] = 1;
        // only evaluate permission the first time round
        // evaluate if object or system permissions enables user to see the included page
        $data = $tikilib->get_page_info($incpage);
    $perms = $tikilib->get_perm_object($incpage, 'wiki page', $data, false);
    if ($perms['tiki_p_view'] != 'y') {
        return '';
    }
    $text = $data['data'];

    $parserlib = TikiLib::lib('parser');
    $parserlib->parse_wiki_argvariable($text);
    return $text;
}