import { Nymph } from '@nymphjs/nymph';
import ws from 'websocket';
import { Config } from './conf/index.js';
import type { QuerySubscriptionData } from './PubSub.types.js';
/**
 * A publish/subscribe server for Nymph.
 *
 * Written by Hunter Perrin for SciActive.
 *
 * @author Hunter Perrin <hperrin@gmail.com>
 * @copyright SciActive Inc
 * @see http://nymph.io/
 */
export default class PubSub {
    /**
     * The Nymph instance.
     */
    nymph: Nymph;
    /**
     * The PubSub config.
     */
    config: Config;
    /**
     * The WebSocket server.
     */
    server: ws.server;
    private sessions;
    protected querySubs: {
        [etype: string]: {
            [query: string]: Map<ws.connection, QuerySubscriptionData>;
        };
    };
    protected uidSubs: {
        [uidName: string]: Map<ws.connection, {
            count: boolean;
        }>;
    };
    protected static transactionPublishes: {
        nymph: Nymph;
        payload: string;
        config: Config;
    }[];
    static initPublisher(config: Partial<Config>, nymph: Nymph): () => void;
    private static publish;
    private static isOrIsDescendant;
    private static publishTransactionPublishes;
    private static removeTransactionPublishes;
    /**
     * Initialize Nymph PubSub.
     *
     * @param config The PubSub configuration.
     */
    constructor(config: Partial<Config>, nymph: Nymph, server: ws.server);
    close(): void;
    handleRequest(request: ws.request): void;
    /**
     * Handle a message from a client.
     */
    onMessage(from: ws.connection, msg: ws.Message): Promise<void>;
    /**
     * Clean up after users who leave.
     */
    onClose(conn: ws.connection, description: string): void;
    onError(conn: ws.connection, e: Error): void;
    /**
     * Handle an authentication from a client.
     */
    private handleAuthentication;
    /**
     * Handle a subscribe or unsubscribe from a client.
     */
    private handleSubscription;
    /**
     * Handle a subscribe or unsubscribe for a query from a client.
     */
    private handleSubscriptionQuery;
    /**
     * Handle a subscribe or unsubscribe for a UID from a client.
     */
    private handleSubscriptionUid;
    /**
     * Handle a publish from a client.
     */
    private handlePublish;
    /**
     * Handle an entity publish from a client.
     */
    private handlePublishEntity;
    private updateClient;
    /**
     * Handle a UID publish from a client.
     */
    private handlePublishUid;
    /**
     * Relay publish data to other servers.
     */
    private relay;
    private findQRefQueries;
    /**
     * This translates qref selectors into ref selectors using the "current" GUID
     * list in the existing subscriptions.
     */
    private translateQRefSelectors;
}