BufferId bufferId = BufferId(chatScene()->idString().toInt());
MsgId lastSeenMsgId = Client::networkModel()->markerLineMsgId(bufferId);
if(lastSeenMsgId < myMsgId && lastSeenMsgId >= prevMsgId) {
BufferId bufferId = BufferId(chatScene()->idString().toInt());
MsgId lastSeenMsgId = Client::networkModel()->markerLineMsgId(bufferId);
if(lastSeenMsgId < myMsgId && lastSeenMsgId >= prevMsgId) {