class.ilObjForumAccess.php

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<?php
/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once 'Services/Object/classes/class.ilObjectAccess.php';
include_once 'Modules/Forum/classes/class.ilObjForum.php';

class ilObjForumAccess extends ilObjectAccess
{
        protected static $userInstanceCache = array();

        public static function _getCommands()
        {
                $commands = array
                (
                        array(
                                'permission'=> 'read',
                                'cmd'       => 'showThreads',
                                'lang_var'  => 'show',
                                'default'   => true
                        ),
                        array(
                                'permission'=> 'write',
                                'cmd'       => 'edit',
                                'lang_var'  => 'settings'
                        ),
                );

                return $commands;
        }

        public static function _checkGoto($a_target)
        {
                global $ilAccess;

                $t_arr = explode('_', $a_target);

                if($t_arr[0] != 'frm' || ((int)$t_arr[1]) <= 0)
                {
                        return false;
                }

                if($ilAccess->checkAccess('read', '', $t_arr[1]))
                {
                        return true;
                }

                return false;
        }

        public static function _getThreadForPosting($a_pos_id)
        {
                global $ilDB;

                $res = $ilDB->queryF(
                        'SELECT pos_thr_fk FROM frm_posts WHERE pos_pk = %s',
                        array('integer'),
                        array($a_pos_id)
                );

                $row = $ilDB->fetchAssoc($res);

                return $row['pos_thr_fk'];
        }

        public static function _lookupDiskUsage($a_obj_id)
        {
                global $ilDB;

                require_once 'Modules/Forum/classes/class.ilFileDataForum.php';

                $res = $ilDB->queryf(
                        'SELECT top_frm_fk, pos_pk FROM frm_posts p
                        JOIN frm_data d ON d.top_pk = p.pos_top_fk
                        WHERE top_frm_fk = %s',
                        array('integer'),
                        array($a_obj_id)
                );

                $size = 0;
                while($row = $ilDB->fetchAssoc($res))
                {
                        $fileDataForum = new ilFileDataForum($row['top_frm_fk'], $row['pos_pk']);
                        $filesOfPost   = $fileDataForum->getFilesOfPost();
                        foreach($filesOfPost as $attachment)
                        {
                                $size += $attachment['size'];
                        }
                        unset($fileDataForum);
                        unset($filesOfPost);
                }

                return $size;
        }

        public static function prepareMessageForLists($text)
        {
                include_once 'Services/Utilities/classes/class.ilStr.php';

                $text = strip_tags($text);
                $text = preg_replace('/\[(\/)?quote\]/', '', $text);
                if(ilStr::strLen($text) > 40)
                {
                        $text = ilStr::subStr($text, 0, 37) . '...';
                }

                return $text;
        }

        public static function _preloadData($obj_ids, $ref_ids)
        {
                /*
                We are only able to preload the top_pk values for the forum ref_ids.
                Other data like statistics and last posts require permission checks per reference, so there is no added value for using an SQL IN() function in the queries
                */
                ilObjForum::preloadForumIdsByRefIds((array)$ref_ids);
        }

        public static function getLastPostByRefId($ref_id)
        {
                return ilObjForum::lookupLastPostByRefId($ref_id);
        }

        public static function getStatisticsByRefId($ref_id)
        {
                return ilObjForum::lookupStatisticsByRefId($ref_id);
        }

        public static function getCachedUserInstance($usr_id)
        {
                if(!isset(self::$userInstanceCache[$usr_id]))
                {
                        self::$userInstanceCache[$usr_id] = ilObjectFactory::getInstanceByObjId($usr_id, false);
                }

                return self::$userInstanceCache[$usr_id];
        }
}