import { PropertyOperations } from "../../../hackle/property/PropertyOperations";
import { HackleUser, User } from "../model/model";
import { UserListener } from "./UserListener";
import { Synchronizer } from "../sync/Synchronizer";
import { Updated } from "../util/Updated";
export interface UserManager extends Synchronizer {
    readonly currentUser: User;
    addListener(listener: UserListener): void;
    resolve(user?: User | string): HackleUser;
    toHackleUser(user: User): HackleUser;
    setUser(user: User): Updated<User>;
    setUserId(userId: string | undefined): Updated<User>;
    setDeviceId(deviceId: string): Updated<User>;
    updateUserProperties(operations: PropertyOperations): Updated<User>;
    resetUser(): Updated<User>;
    syncIfNeeded(updated: Updated<User>): Promise<void>;
}
export declare const isSameUser: (a: User | null, b: User) => boolean;
export declare const mergeUsers: (oldUser: User, newUser: User) => User;