dspace-angular/src/app/register-page/create-profile/confirmed.validator.ts

import { FormGroup } from '@angular/forms';

/**
 * Validator used to confirm that the password and confirmed password value are the same
 */
export function ConfirmedValidator(controlName: string, matchingControlName: string) {
  return (formGroup: FormGroup) => {
    const control = formGroup.controls[controlName];
    const matchingControl = formGroup.controls[matchingControlName];
    if (matchingControl.errors && !matchingControl.errors.confirmedValidator) {
      return;
    }
    if (control.value !== matchingControl.value) {
      matchingControl.setErrors({confirmedValidator: true});
    } else {
      matchingControl.setErrors(null);
    }
  };
}