import { BehaviorSubject, Observable } from 'rxjs';
import * as i0 from "@angular/core";
/**
 *
 * @interface UserActivityEntry
 *
 * UserActivityEntry is a single entry at the user activity list
 *
 */
export declare interface UserActivityEntry {
    category: string;
    description: string;
    url: string;
    dateCreated: Date;
}
/**
 * UserActivityService
 *
 * Handles the user activity tracking.
 *
 */
export declare class UserActivityService {
    protected userActivityEntries$: BehaviorSubject<UserActivityEntry[]>;
    protected maxItems: number;
    protected list: Array<UserActivityEntry>;
    constructor();
    /**
     *
     * Adds a single item at the userActivity service.
     *
     * @param {UserActivityEntry} entry The entry to be written
     *
     */
    setItem(entry: UserActivityEntry): Promise<void>;
    /**
     *
     * Get the list of the user activity.
     *
     * @returns {Array<UserActivityEntry>} The list of the entries
     *
     */
    getItems(): Promise<Array<UserActivityEntry>>;
    /**
     *
     * Get the list of the user activity as observable
     *
     */
    getItemsAsObservable(): Promise<Observable<Array<UserActivityEntry>>>;
    static ɵfac: i0.ɵɵFactoryDeclaration<UserActivityService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UserActivityService>;
}