/// <summary>
/// Determines if a user is subscribed to a topic
/// </summary>
/// <param name="topicId"></param>
/// <param name="userId"></param>
/// <param name="config"></param>
public static bool IsUserSubscribed(int topicId, int userId, SiteConfiguration config, ITopicsSubscriptionsService service)
{
if (!config.Notifications.Subscription.IsDefined)
{
return false;
}
var usersSubscribed = service.GetSubscribed(topicId);
return usersSubscribed.Any(x => x.Id == userId);
}
