/// <summary>
/// 更换群主
/// </summary>
/// <param name="groupId">专题Id</param>
/// <param name="newOwnerUserId">新群主UserId</param>
public void ChangeTopicOwner(long groupId, long newOwnerUserId)
{
//更换群主后，原群主转换成专题成员，如果新群主是专题成员则从成员中移除
TopicEntity group = groupRepository.Get(groupId);
long oldOwnerUserId = group.UserId;
group.UserId = newOwnerUserId;
groupRepository.ChangeTopicOwner(groupId, newOwnerUserId);
//原群主的专题数-1，加入专题数+1
OwnerDataService ownerDataService = new OwnerDataService(TenantTypeIds.Instance().User());
ownerDataService.Change(oldOwnerUserId, OwnerDataKeys.Instance().CreatedTopicCount(), -1);
ownerDataService.Change(oldOwnerUserId, OwnerDataKeys.Instance().JoinedTopicCount(), 1);
//原群主转换成专题成员
TopicMember TopicMember = TopicMember.New();
TopicMember.TopicId = groupId;
TopicMember.UserId = oldOwnerUserId;
TopicMemberRepository.Insert(TopicMember);
//新群主的专题数+1,加入专题数-1
ownerDataService.Change(newOwnerUserId, OwnerDataKeys.Instance().CreatedTopicCount(), 1);
//如果新群主是专题成员则从成员中移除
if (IsMember(groupId, newOwnerUserId))
{
DeleteTopicMember(groupId, newOwnerUserId);
}
}