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import {Directive, Input} from '@angular/core';
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import { AbstractControl, NG_VALIDATORS, ValidationErrors, Validator, ValidatorFn } from '@angular/forms';
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export function rangeRequired( enabled:boolean): ValidatorFn {
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return (control: AbstractControl): ValidationErrors | null => {
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const yearFrom = control.get('yearFrom');
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const yearTo = control.get('yearTo');
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return ((yearFrom && yearTo && enabled && (yearFrom.value == "" || yearTo.value == "")) ? { 'rangeRequired': true } : null);
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};
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}
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@Directive({
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selector: '[rangeRequired]',
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providers: [{ provide: NG_VALIDATORS, useExisting: RangeYearsRequiredDirective, multi: true }]
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})
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export class RangeYearsRequiredDirective implements Validator {
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@Input('rangeRequired') enabled:boolean = false;
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validate(control: AbstractControl): ValidationErrors {
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return rangeRequired(this.enabled)(control)
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}
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}
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