class.ilChatroomClearTask.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */


class ilChatroomClearTask extends ilChatroomTaskHandler
{

        private $gui;

        public function __construct(ilChatroomObjectGUI $gui)
        {
            $this->gui = $gui;
        }

        public function executeDefault($method)
        {
            global $ilUser, $ilCtrl;

            require_once 'Modules/Chatroom/classes/class.ilChatroom.php';
            require_once 'Modules/Chatroom/classes/class.ilChatroomUser.php';

            if ( !ilChatroom::checkUserPermissions( array('moderate') , $this->gui->ref_id ) )
            {
                $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", ROOT_FOLDER_ID);
                $ilCtrl->redirectByClass("ilrepositorygui", "");
            }

            $room = ilChatroom::byObjectId( $this->gui->object->getId() );

            if( $room )
            {
                // if user is in scope
                $scope = $room->getRoomId();

                $chat_user = new ilChatroomUser( $ilUser, $room );

                $message = json_encode( $this->buildMessage(
                    ilUtil::stripSlashes( (int)$_REQUEST['sub'] ), $chat_user
                ) );

                $params = array(
                        'message' => $message,
                );

                $query          = http_build_query( $params );
                $connector      = $this->gui->getConnector();
                $response       = $connector->post( $scope, $query );
                $responseObject = json_decode( $response );
                
                $room->clearMessages($_REQUEST['sub']);
            }
            else
            {
                $response = json_encode( array(
                    'success'   => false,
                    'reason'    => 'unkown room'
                ) );
            }

            echo $response;
            exit;
        }

        private function buildMessage($messageString, ilChatroomUser $chat_user)
        {
                $data = new stdClass();

                $data->user         = $this->gui->object->getPersonalInformation( $chat_user );
                $data->timestamp    = date( 'c' );
                $data->type         = 'clear';
                $data->sub          = $messageString;

                return $data;
        }
}

?>