public function cronSendWellcomeLetter()
{
$preferenceValues = array('send_wellcome_letter' => 1);
$userIdList = $this->userDao->findUserIdListByPreferenceValues($preferenceValues);
if (empty($userIdList)) {
return;
}
$users = $this->findUserListByIdList($userIdList);
foreach ($users as $user) {
$this->sendWellcomeLetter($user);
}
}
