/**
* Create an activity from parameters.
*
* @param array $params Parameters describing activity
*
* @return ActivityModel Activity that was created.
*/
public function createActivity(array $params)
{
// Find the creator
$user = $this->getServiceManager()->get('user_role');
if ($user === 'guest') {
throw new \InvalidArgumentException('Guests can not create activities');
}
$params['creator'] = $user;
$activity = new ActivityModel();
$activity->create($params);
$em = $this->getServiceManager()->get('Doctrine\\ORM\\EntityManager');
$em->persist($activity);
$em->flush();
return $activity;
}