MojoX::Validator

    my $validator = MojoX::Validator->new;

    # Fields
    $validator->field('phone')->required(1)->regexp(qr/^\d+$/);
    $validator->field([qw/firstname lastname/])
      ->each(sub { shift->required(1)->length(3, 20) });

    # Groups
    $validator->field([qw/password confirm_password/])
      ->each(sub { shift->required(1) });
    $validator->group('passwords' => [qw/password confirm_password/])->equal;

    # Conditions
    $validator->field('document');
    $validator->field('number');
    $validator->when('document')->regexp(qr/^1$/)
      ->then(sub { shift->field('number')->required(1) });

    $validator->validate($values_hashref);
    my $errors_hashref = $validator->errors;
    my $pass_error = $validator->group('passwords')->error;
    my $validated_values_hashref = $validator->values;