import { EventEmitter } from '@angular/core';
import { HttpParams } from '@angular/common/http';
/**
 * `PollingService` service to manage a set of polling components.
 *
 * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
 * @export
 */
export declare class PollingService {
    /**
     * Output emmiter add event.
     */
    refresh: EventEmitter<HttpParams>;
    /**
     * Count of request running.
     */
    private requestRunningCount;
    /**
     * Current params.
     */
    private params;
    /**
     * Execute refresh event.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof PollingService
     */
    forceRefresh(): void;
    /**
     * Handles start request loading.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof PollingService
     */
    startLoading(): void;
    /**
     * Handles end request loading.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof PollingService
     */
    endLoading(): void;
    /**
     * Check if any request is running.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof PollingService
     */
    isUpdating(): boolean;
    /**
     * Set request params.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof PollingService
     */
    setParam(key: string, value: string): void;
    /**
     * Generate request params.
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     * @memberof PollingService
     */
    private generateParams();
}