bool CPVRChannelGroupInternal::UpdateGroupEntries(CPVRChannelGroup *channels)
{
  CPVRDatabase *database = CPVRManager::Get()->GetTVDatabase();
  if(!database && !database->Open())
    return false;

  int iSize = size();
  for (int ptr = 0; ptr < iSize; ptr++)
  {
    CPVRChannel *channel = at(ptr).channel;

    /* ignore virtual channels */
    if (channel->IsVirtual())
      continue;

    /* check if this channel is still present */
    const CPVRChannel *existingChannel = channels->GetByUniqueID(channel->UniqueID());
    if (existingChannel)
    {
      /* if it's present, update the current tag */
      if (channel->UpdateFromClient(*existingChannel))
      {
        channel->Persist(true);
        CLog::Log(LOGINFO,"PVRChannelGroupInternal - %s - updated %s channel '%s'",
            __FUNCTION__, m_bRadio ? "radio" : "TV", channel->ChannelName().c_str());
      }

      /* remove this tag from the temporary channel list */
      channels->RemoveByUniqueID(channel->UniqueID());
    }
    else
    {
      /* channel is no longer present */
      CLog::Log(LOGINFO,"PVRChannelGroupInternal - %s - removing %s channel '%s'",
          __FUNCTION__, m_bRadio ? "radio" : "TV", channel->ChannelName().c_str());
      channel->Delete();
      erase(begin() + ptr);
      ptr--;
      iSize--;
    }
  }

  /* the temporary channel list only contains new channels now */
  for (unsigned int ptr = 0; ptr < channels->size(); ptr++)
  {
    CPVRChannel *channel = channels->at(ptr).channel;
    channel->Persist(true);

    PVRChannelGroupMember member = { channel, size() };
    push_back(member);

    CLog::Log(LOGINFO,"PVRChannelGroupInternal - %s - added %s channel '%s'",
        __FUNCTION__, m_bRadio ? "radio" : "TV", channel->ChannelName().c_str());
  }

  /* post the queries generated by the update */
  database->CommitInsertQueries();

  database->Close();

  Renumber();

  return true;
}