import { SudoSubscriber, ChangeType, ConnectionState } from './sudo-subscriber';
import { Sudo } from './sudo';
import Observable from 'zen-observable';
export type SubscriptionResult<T> = {
    data: T;
};
export declare class SubscriptionManager<T> {
    subscribers: Record<string, SudoSubscriber>;
    subscription: ZenObservable.Subscription | undefined;
    watcher: Observable<SubscriptionResult<T>> | undefined;
    /**
     * Adds or replaces a subscriber with the specified ID.
     *
     * @param id subscriber ID.
     * @param subscriber subscriber to subscribe.
     */
    replaceSubscriber(id: string, subscriber: SudoSubscriber): void;
    /**
     * Removes the subscriber with the specified ID.
     * and the subscription for that same ID
     * @param id subscriber ID.
     */
    removeSubscriber(id: string): void;
    /**
     * Removes all subscribers and subscriptions
     */
    removeAllSubscribers(): void;
    /**
     * Notifies  subscribers of a new, updated or deleted Sudo.
     *
     * @param changeType change type. Please refer to [SudoSubscriber.ChangeType].
     * @param sudo new, updated or deleted Sudo.
     */
    sudoChanged(changeType: ChangeType, sudo: Sudo): void;
    /**
     * Processes AppSync subscription connection status change.
     *
     * @param state connection state.
     */
    connectionStatusChanged(state: ConnectionState): void;
}