/* Add User to specified room.
* If room is not specified, add to 'public' room.
* If user in other room, switch to specified room.
* */
public bool AddUserToRoom(IUser user, string roomName = publicRoomName)
{
if (!ContainRoom(roomName))
return false; //room not exist
if (!ContainUser(user))
return false; //user not exist
if(userMap[user] == roomName)
return true; //stay in room.
if (userMap[user] != nullRoomName) //if user already in one room, leave firstly.
RemoveUserFromRoom(user);
userMap[user] = roomName;
roomMap[roomName].Add(user);
//Notify others.
UserSendMassageToRoom(user, "\r\n<= *new user joined chat: "+user.GetStatus().UserName+"\r\n=> ");
return true;
}
/* Remove user from room. when last user leave, room will be removed too
* 'public' room always exist.
* */
public void RemoveUserFromRoom(IUser user)
{
if (userMap[user] == nullRoomName) //user not in any room.
return;
string roomname = userMap[user];
roomMap[roomname].Remove(user);
userMap[user] = nullRoomName;
RoomBroadcast(roomname, "\r\n<= *user has left chat: "+user.GetStatus().UserName+"\r\n=> ");
user.SendToClient("\r\n<= *user has left chat: " + user.GetStatus().UserName + " (**this is you)\r\n");
//when last user leave
if (roomMap[roomname].Count == 0 && roomname != publicRoomName)
{
RemoveRoom(roomname);
}
}