import { Logger, MessageBus } from '@tangential/core';
import { FirebaseProvider } from '@tangential/firebase-util';
import { Observable } from 'rxjs';
import { AuthSubject } from '../../media-type/cdm/auth-subject';
import { AuthUserKey } from '../../media-type/doc-model/auth-user';
import { AuthenticationService } from '../authentication-service/authentication-service';
import { Visitor } from './media-type/cdm/visitor';
import { VisitorPreferences } from './media-type/cdm/visitor-preferences';
import { VisitorService } from './visitor-service';
import * as i0 from "@angular/core";
export declare class FirebaseVisitorService extends VisitorService {
    private bus;
    protected logger: Logger;
    private fb;
    private authService;
    /**
     * Waits for the first non-placeholder visitor (e.g. not the default value provided to the behaviour subject).
     * This is basically saying 'wait for the Firebase auth server to respond.
     *
     * Subsequent calls to this method will be provided the same observable instance as the initial call. The has the effect of
     * making the timeoutMils argument effective only on the initial call to this method for the current client session.
     *
     * The returned observable will never complete.
     * @param timeoutMils
     * @returns {Observable<R>}
     */
    private awaitVisitorObserver;
    private db;
    private visitorObserver;
    constructor(bus: MessageBus, logger: Logger, fb: FirebaseProvider, authService: AuthenticationService);
    getCurrentVisitor(subject: AuthSubject): Promise<Visitor>;
    getVisitorPreferences(key: AuthUserKey): Promise<VisitorPreferences>;
    visitor$(): Observable<Visitor>;
    awaitVisitor$(timeoutMils?: number): Observable<Visitor>;
    setVisitorPreferences(key: AuthUserKey, prefs: VisitorPreferences): Promise<void>;
    updateVisitorPreferences(key: AuthUserKey, prefs: VisitorPreferences): Promise<void>;
    private initSubscriptions;
    private doCatch;
    static ɵfac: i0.ɵɵFactoryDeclaration<FirebaseVisitorService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FirebaseVisitorService>;
}