function handle(DataObject $model)
{
// Do we want to generate an account number?
$system_prefs = SystemPreferences::instance();
$autoGenerate = $system_prefs->getPreferenceValue('auto-account-numbering', 'contacts');
if (!(empty($autoGenerate) || $autoGenerate === 'off')) {
// Obviously not.
return false;
}
if (isset($model->accountnumber)) {
// Account number already filled in, so just return.
return false;
}
return $model->createAccountNumber();
}
