=head1 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;