import { OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import { FormBuilder, FormControl, FormGroup } from '@angular/forms';
import { CreateDateValue, KnoraDate, KnoraPeriod, ReadDateValue, UpdateDateValue } from '@dasch-swiss/dsp-js';
import { Subscription } from 'rxjs';
import { BaseValueComponent } from '../base-value.component';
import { ValueErrorStateMatcher } from '../value-error-state-matcher';
import { DateInputComponent } from './date-input/date-input.component';
export declare class DateValueComponent extends BaseValueComponent implements OnInit, OnChanges, OnDestroy {
    private _fb;
    dateInputComponent: DateInputComponent;
    displayValue?: ReadDateValue;
    displayOptions?: 'era' | 'calendar' | 'all';
    labels: boolean;
    ontologyDateFormat: string;
    valueFormControl: FormControl;
    commentFormControl: FormControl;
    form: FormGroup;
    valueChangesSubscription: Subscription;
    customValidators: any[];
    matcher: ValueErrorStateMatcher;
    constructor(_fb: FormBuilder);
    /**
     * Returns true if both dates are the same.
     *
     * @param date1 date for comparison with date2
     * @param date2 date for comparison with date1
     */
    sameDate(date1: KnoraDate, date2: KnoraDate): boolean;
    standardValueComparisonFunc(initValue: KnoraDate | KnoraPeriod, curValue: KnoraDate | KnoraPeriod | null): boolean;
    getInitValue(): KnoraDate | KnoraPeriod | null;
    ngOnInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    /**
     * Given a value and a period or Date, populates the value.
     *
     * @param value the value to be populated.
     * @param dateOrPeriod the date or period to read from.
     */
    populateValue(value: UpdateDateValue | CreateDateValue, dateOrPeriod: KnoraDate | KnoraPeriod): void;
    getNewValue(): CreateDateValue | false;
    getUpdatedValue(): UpdateDateValue | false;
}