public static function get_groups($api_key, $api_secret)
{
try {
$api = new GoogleUtilityClient($api_key, $api_secret, 'HOSTED_OR_GOOGLE');
$api->authenticate();
$groups_response = $api->get('group/2.0/' . $api->domain);
$entries = $groups_response['list']->getElementsByTagName('property');
$groups = array();
foreach ($entries as $entry) {
if ($entry->getAttribute('name') == 'groupName') {
$groups[] = $entry->getAttribute('value');
}
}
} catch (GoogleUtilityClientException $e) {
throw new GoogleDomainException($e->getMessage());
}
return $groups;
}
