/// <summary>
/// Returns or creats a chat room for these two users or create a new one if nothing exists
/// </summary>
/// <param name="user1ID"></param>
/// <param name="user1Name"></param>
/// <param name="user2ID"></param>
/// <param name="user2Name"></param>
/// <returns></returns>
private static ChatRoom GetRoom(string user1ID,string user1Name,string user2ID,string user2Name)
{
ChatRoom room=null;
string rid1=CreateRoomID(user1ID,user2ID);
string rid2=CreateRoomID(user2ID,user1ID);
Monitor.Enter(Rooms);
if (Rooms.Contains(rid1))
room=(ChatRoom)Rooms[rid1];
else
{
if (Rooms.Contains(rid2))
room=(ChatRoom)Rooms[rid2];
else
{
//if (user1Name=="" && user2Name=="")
// return null;
//else
room=new ChatRoom(user1ID,user1Name,user2ID,user2Name);
Rooms.Add(rid1,room);
}
}
Monitor.Exit(Rooms);
return room;
}