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

export class CustomValidators {
  static whiteSpaceValidator(control: FormControl) {
    const isWhitespace = (control.value || '').trim().length === 0;
    const isValid = !isWhitespace;
    return isValid ? null : {'whitespace': 'value is only whitespace'};
  }

  static minAndMaxLengthValidator(control: FormControl) {
    const isMinLength = ((control.value || '').length < 2 || (control.value || '').length >= 20);
    const isValid = !isMinLength;
    return isValid ? null : {'Minlength': 'value is not equal to min length'};
  }
}