import { Field } from './Field';
import { Folder } from './Folder';
import { Message } from './Client';
export declare type ServerWSHandler = (ws: any, data: any) => (Message | void);
export declare class Server {
    private port;
    webSocketServer: any;
    expressApp: any;
    httpServer: any;
    wsConnections: Set<any>;
    wsHandlers: Map<string, ServerWSHandler>;
    private folders;
    constructor(port: number);
    notifyClientOfNewField(wsConn: any, folderName: string, fieldName: string, field: Field<any>): void;
    getFolder(name: string): Folder;
    start(): void;
    close(): void;
    broadcastWS(msg: Message): void;
    sendWS(wsConn: any, msg: Message): void;
    addWsMessageHandler(type: string, handler: ServerWSHandler): void;
}