class.ilObjLinkResourceAccess.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");

class ilObjLinkResourceAccess extends ilObjectAccess
{
        static $item = array();
        static $single_link = array();
        
        static function _getCommands()
        {
                $commands = array
                (
                        array("permission" => "read", "cmd" => "", "lang_var" => "show",
                                "default" => true),
                        array("permission" => "read", "cmd" => "exportHTML", "lang_var" => "export_html"),
                        array("permission" => "write", "cmd" => "editLinks", "lang_var" => "edit_content"),
                        array("permission" => "write", "cmd" => "settings", "lang_var" => "settings")
                );
                
                return $commands;
        }

        static function _checkGoto($a_target)
        {
                global $ilAccess;
                
                $t_arr = explode("_", $a_target);

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

                if ($ilAccess->checkAccess("read", "", $t_arr[1]) ||
                        $ilAccess->checkAccess("visible", "", $t_arr[1]))
                {
                        return true;
                }
                return false;
        }

        public function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
        {
                global $rbacsystem;
                
                // Set offline if no valid link exists
                if($a_permission == 'read')
                {
                        if(!self::_getFirstLink($a_obj_id) && !$rbacsystem->checkAccessOfUser($a_user_id,'write',$a_ref_id))
                        {
                                return false;
                        }
                }
                        
                if ($a_cmd == "settings")
                {
                        if (self::_checkDirectLink($a_obj_id))
                        {
                                return false;
                        }
                }
                return parent::_checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id);
        }

        public static function _getFirstLink($a_webr_id)
        {
                global $ilDB;

                if (isset(self::$item[$a_webr_id]))
                {
                        return self::$item[$a_webr_id];
                }
                $query = "SELECT * FROM webr_items ".
                        "WHERE webr_id = ".     $ilDB->quote($a_webr_id ,'integer').' '.
                        "AND active = ".$ilDB->quote(1,'integer').' ';
                $res = $ilDB->query($query);
                
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        $item['title']                          = $row->title;
                        $item['description']            = $row->description;
                        $item['target']                         = $row->target;
                        $item['active']                         = (bool) $row->active;
                        $item['disable_check']          = $row->disable_check;
                        $item['create_date']            = $row->create_date;
                        $item['last_update']            = $row->last_update;
                        $item['last_check']                     = $row->last_check;
                        $item['valid']                          = $row->valid;
                        $item['link_id']                        = $row->link_id;
                        self::$item[$row->webr_id] = $item;
                }
                return $item ? $item : array();
        }

        static function _preloadData($a_obj_ids, $a_ref_ids)
        {
                global $ilDB, $ilUser;
                
                $res = $ilDB->query(
                                "SELECT * FROM webr_items WHERE ".
                                $ilDB->in("webr_id", $a_obj_ids, false, "integer").
                                " AND active = ". $ilDB->quote(1,'integer'));
                foreach ($a_obj_ids as $id)
                {
                        self::$item[$id] = array();
                }
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        $item['title']                          = $row->title;
                        $item['description']            = $row->description;
                        $item['target']                         = $row->target;
                        $item['active']                         = (bool) $row->active;
                        $item['disable_check']          = $row->disable_check;
                        $item['create_date']            = $row->create_date;
                        $item['last_update']            = $row->last_update;
                        $item['last_check']                     = $row->last_check;
                        $item['valid']                          = $row->valid;
                        $item['link_id']                        = $row->link_id;
                        self::$item[$row->webr_id] = $item;
                }
        }

        static function _checkDirectLink($a_obj_id)
        {
                if(isset(self::$single_link[$a_obj_id]))
                {
                        return self::$single_link[$a_obj_id];
                }
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                return self::$single_link[$a_obj_id] = ilLinkResourceItems::_isSingular($a_obj_id);
        }

}

?>