import { ContextService } from '../context';
import { DeriveContextServiceContract } from '../../models/context/update-context-method';
import { LifecycleHooks } from '../../providers/service/lifecycle-hooks';
import { ValueChangeCallback } from '../../models/context/value-change-callback';
import { UserPreferences } from '../../models/user-preference/user-preferences';
type UserPreferencesContextFields = {
    readonly USER_PREFERENCES: string;
};
type UserPreferencesContextFieldParams = {
    readonly USER_PREFERENCES: UserPreferences;
};
/**
 * Context service responsible for storing user-specific data for the current application session.
 */
export declare class UserPreferencesContextService extends ContextService<UserPreferencesContextFields> implements DeriveContextServiceContract<UserPreferencesContextFields, UserPreferencesContextFieldParams>, LifecycleHooks {
    readonly USER_PREFERENCES = "userPreferences";
    /**
     * Returns the current user's preferences.
     *
     * @returns The current user's preferences, or {@code undefined} if they have not been initialized.
     */
    getUserPreferences(): UserPreferences | undefined;
    /**
     * Updates the current user's preferences.
     *
     * @param userPreferences - The preferences to store for the current user.
     */
    updateUserPreferences(userPreferences: UserPreferences): void;
    /**
     * Registers a callback invoked whenever the current user's preferences are updated.
     *
     * @param callbackFunction - The function to invoke when the preferences change.
     * @returns A function that unsubscribes the callback.
     */
    onUserPreferencesChanged(callbackFunction: ValueChangeCallback<UserPreferences | undefined>): () => void;
}
export {};