import { Pipe, PipeTransform } from '@angular/core';
import { isNil, toString } from 'lodash';

@Pipe({
  name: 'ssnMask',
})

export class SSNMaskPipe implements PipeTransform {
  transform(ssn: number): string {
    return isNaN(ssn) || isNil(ssn) ? undefined : 'XXX-XX-' + toString(ssn).substr(5, 4);
  }
}