def publish(topic, user, %{data: %{"type" => type}} = activity) when type in @supported_activities do
# TODO: Only send to still valid subscriptions.
query = from sub in WebsubServerSubscription,
def publish(topic, user, %{data: %{"type" => type}} = activity) when type in @supported_activities do
# TODO: Only send to still valid subscriptions.
query = from sub in WebsubServerSubscription,