passwords strength.validator.ts

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  import type { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
import { passwordStrength } from 'check-password-strength';
 
import { PASSWORDS } from '~/app/shared/constants';
 
import { getPasswordControlValue } from './util';
 
/**
 * Validator for new password complexity based on [check-password-strength](https://github.com/deanilvincent/check-password-strength)
 */
export const passwordStrengthValidator: ValidatorFn = (control: AbstractControl<unknown>): ValidationErrors | null => {
  const value = getPasswordControlValue(control);
 
  // Like Validators.email, rely on Validators.required to check for blank passwords.
  if (value == undefined) {
    return null; // eslint-disable-line unicorn/no-null -- ValidatorFn returns null
  }
 
  const strength = passwordStrength(value);
  return strength.id < PASSWORDS.minStrength ? { passwordstrength: strength.value } : null; // eslint-disable-line unicorn/no-null
};