public void RemoveBuddy(string buddyId)
{
if (!_buddyIds.Any())
{
throw new InvalidOperationException("Group is already empty");
}
if (Status != GroupStatus.Merging && _buddyIds.Count == 1)
{
throw new InvalidOperationException("Can't leave group when you're the only one in it");
}
if (!_buddyIds.Contains(buddyId))
{
throw new InvalidOperationException($"Buddy {buddyId} isn't present in the current group");
}
var e = new BuddyRemoved(Id, buddyId);
Publish(e);
}
private void When(BuddyRemoved e)
{
_buddyIds.Remove(e.BuddyId);
_buddyIdsBlackList.Add(e.BuddyId);
}
