import { Observable } from 'rxjs';
import { Period } from '../period';
import { DateTime } from 'luxon';
import * as i0 from "@angular/core";
/**
 * The service provides the current calendar period. It is specified:
 * <ul>
 *   <li>As the period between a start and end date if both are specified</li>
 *   <li>The duration of a year following the start date if no end date is specified</li>
 *   <li>The duration of a year preceding the end date if no start date is specified</li>
 *   <li>The full current year from jan 1st to dec 31 if neither start nor end date are specified</li>
 */
export declare class PeriodService {
    private readonly _period$;
    private readonly _isFullYear$;
    private readonly _startDate$;
    private readonly _endDate$;
    /**
     * Set the start date of the period. If the parameter is null the start date will be calculated
     * @param date A luxon date or null
     */
    set startDate(date: DateTime);
    /**
     * Set the end date of the period. If the parameter is null the end date will be  calculated.
     * @param date A luxon date or null
     */
    set endDate(date: DateTime);
    /**
     * The observable with the period between start- and end date or the current year if neither is passed.
     */
    get period$(): Observable<Period>;
    /**
     * Returns true if neither start nor end were given and the current year was picked instead.
     */
    get isFullYear$(): Observable<boolean>;
    constructor();
    private static getCurrentYearPeriod;
    private static calculatePeriod;
    static ɵfac: i0.ɵɵFactoryDeclaration<PeriodService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<PeriodService>;
}