public async Task <FriendDto> Create(Guid userId, Guid friendUserId)
{
if (Equals(userId, friendUserId))
{
throw new Exception("Failed to create friend request, cannot invite yourself");
}
if (await _repository.Exists(userId, friendUserId))
{
throw new Exception("A friends connection or request already exists between these users");
}
var friend = Friend.Create(userId, friendUserId);
if (await _repository.Create(friend))
{
friend = await _repository.GetSingle(friend.Id);
var invitee = await _usersRepository.Get(userId);
PublicFriendInvitationReceivedEvent(friendUserId, invitee.Name);
return(friend?.ToDto());
}
return(null);
}