function ValidateParameters($user, $password, $retypedPassword)
{
if (empty($user)) {
return new Error(Error::InvalidParameter, "User name cannot be empty.");
}
if (UserFacade::IsUserRegistered($user)) {
return new Error(Error::NotUniqueValue, "User with provided name is already registered.");
}
if (empty($password)) {
return new Error(Error::InvalidParameter, "Password cannot be empty.");
}
if (strcmp($password, $retypedPassword)) {
return new Error(Error::InvalidParameter, "Passwords don't match to each other.");
}
return new Error();
}
