/**
* Emits an activity to the clients.
* @param String $message The message for the activity.
* @param User $user The user who did the activity. Optional.
* @param String $url The url for the activity. Optional.
* @return Object
*/
public function emitActivity($message, User $user = null, $url = null)
{
// Set up the context to pass along
$context = array('mode' => 'emit_activity', 'message' => $message);
if ($user != null) {
$context['user'] = json_encode($user->getContext());
}
if ($url != null && $url != '') {
$context['url'] = $url;
}
// Contact the server to push accordingly
return $this->getJSONResponse($context);
}
