UserService

<?php
namespace User\Service;

use Locale;
use Zend\Math\Rand;
use Zend\Crypt\Password\Bcrypt;
use Zend\Db\Adapter\Exception\InvalidQueryException;
use Application\Mail\Mailer;
use User\Entity\User as UserEntity;
use User\Entity\UserFilter;
use User\Entity\UserInterface as UserEntityInterface;
use User\Mapper\User as UserMapper;
use User\Form\UserSaveForm;
use User\Form\UserDeleteForm;
use User\Options\ModuleOptions;

class User
{
    public function getRegisterForm()
    {
        if (null === $this->registerForm) {
            $inputFilter = $this->getFilter();
            $inputFilter->setValidationGroup(array(
                'nickname', 'email', 'password', 'firstname', 'lastname'
            ));

            $this->registerForm = new UserSaveForm();
            $this->registerForm->remove('id');
            $this->registerForm->remove('status');
            $this->registerForm->remove('group');
            $this->registerForm->setInputFilter($inputFilter);
            $this->registerForm->setHydrator($this->getMapper()->getHydrator());

            $this->setMessage('user_message_info_user_add');
        }

        return $this->registerForm;
    }

    public function insert(array $data)
    {
        // create new user entity
        $user = new UserEntity();

        // get form, bin object to it and set data
        $form = $this->getRegisterForm();
        $form->bind($user);
        $form->setData($data);

        // check for invalid data
        if (!$form->isValid()) {
            $this->setMessage('application_message_error_check_input');
            return false;
        }

        [...]
    }
}