export interface SystemMessage {
    timestamp: number;
    avatar: string;
    username: string;
    color: string;
    uid: string;
    title: string;
    room: string;
}
/**
 * 解析用户加入房间的系统消息
 * @param message 消息
 * @returns {SystemMessage | undefined}
 */
export declare const joinRoom: (message: string) => {
    timestamp: number;
    avatar: string;
    username: string;
    color: string;
    uid: string;
    title: string;
    room: string;
};