public async Task Unsubscribe(Guid userId, Guid eventId)
{
UserEntity user = await _userRepository.GetByIdAsync(userId);
EventSubscriberEntity eventSubscriber =
user.EventsSubscribed.FirstOrDefault(e => e.EventId == eventId && e.SubscriberId == userId);
if (eventSubscriber is null)
{
throw new MessageException($"User {user.Name} is not subscribed on this event");
}
user.EventsSubscribed.Remove(eventSubscriber);
await _userRepository.CommitAsync();
}
public async Task Subscribe(Guid userId, Guid eventId)
{
UserEntity user = await _userRepository.GetByIdAsync(userId);
EventEntity @event = await _eventRepository.GetByIdAsync(eventId);
EventSubscriberEntity eventSubscriber = new EventSubscriberEntity
{
Event = @event,
Subscriber = user
};
user.EventsSubscribed.Add(eventSubscriber);
try
{
await _userRepository.CommitAsync();
}
catch (Exception e)
{
throw new MessageException($"User {user.Name} is already subscribed on this event", e);
}
}
