//CHANGE ROOM
private void action_change_room()
{
//store old room number
int oldroom = room;
//Remove the user from the chat room
chatserver.RemoveRoomUser(chatserver.RoomUsers[oldroom - 1], nickname);
//Assigned to No room first
room = 0;
//while no room is assigned
while (room == 0)
{
//Get room number from client
chatserver.Write(client.GetStream(),
ChatProtocolValues.CHOOSE_ROOM(nickname, chatserver.NumRoom));
string temp = chatserver.Read(client.GetStream());
//check for valid room number
try
{
//convert the text message to integer
int r_n = int.Parse(temp);
//check to make sure that the room number is within range
if ((r_n >= 1) && (r_n <= chatserver.NumRoom))
{
room = r_n;
}
}
catch {}
}
//Add user to the assigned room
chatserver.AddRoomUser(chatserver.RoomUsers[room - 1], nickname);
//Broadcast to old room participants
chatserver.Broadcast(ChatProtocolValues.MOVE_TO(nickname, room), oldroom);
//Broadcast to new room participants
chatserver.Broadcast(ChatProtocolValues.WELCOME(nickname, room), room);
}
//The main method that handle all the chat communication with the client
private void HandleClient()
{
try
{
//Autheticate the user
AuthenticationServer auth = new AuthenticationServer(chatserver, client);
if (!auth.Authenticate())
{
throw(new Exception());
}
//Send connection message to client
//returning the user id
chatserver.Write(client.GetStream(),
ChatProtocolValues.CONNECTION_MSG(auth.UserID));
//buffer
byte[] bytes = new byte[256];
//set nickname as user id which is alraedy unique
nickname = auth.UserID;
//Assign a room to connected client
room = chatserver.AssignRoom(nickname);
Console.WriteLine("room assigned= " + room + " for " + nickname);
//Add to Connections
try
{
chatserver.AddConnection(nickname, client);
}
catch {}
//Broadcast to chat room about the new user
chatserver.Broadcast(ChatProtocolValues.WELCOME(nickname, room), room);
//listen to all client data send
while ((readdata = chatserver.Read(client.GetStream())) != "")
{
readdata = readdata.Trim();
//Print out read data in console
Console.WriteLine("Read>" + readdata);
//Check if the readdata is a command
if (readdata.ToUpper().Substring(0, 1) == ChatProtocolValues.IS_CMD)
{
//Assign a default action
action = new SocketHelperAction(action_default);
//Reassign action based on format content
if ((readdata.ToUpper() + ":").IndexOf(ChatProtocolValues.GET_PIC_CMD) == 0)
{
action = new SocketHelperAction(action_get_pic);
}
if ((readdata.ToUpper() + ":").IndexOf(ChatProtocolValues.SEND_PIC_CMD) == 0)
{
action = new SocketHelperAction(action_send_pic);
}
if ((readdata.ToUpper() + ":").IndexOf(ChatProtocolValues.GET_MEDIA_CMD) == 0)
{
action = new SocketHelperAction(action_get_media);
}
if ((readdata.ToUpper() + ":").IndexOf(ChatProtocolValues.SEND_MEDIA_CMD) == 0)
{
action = new SocketHelperAction(action_send_media);
}
if ((readdata.ToUpper() + " ").IndexOf(ChatProtocolValues.HELP_CMD) == 0)
{
action = new SocketHelperAction(action_help);
}
if ((readdata.ToUpper() + " ").IndexOf(ChatProtocolValues.QUIT_CMD) == 0)
{
action = new SocketHelperAction(action_quit);
}
if ((readdata.ToUpper() + " ").IndexOf(ChatProtocolValues.CHANGE_ROOM_CMD) == 0)
{
action = new SocketHelperAction(action_change_room);
}
if ((readdata.ToUpper() + " ").IndexOf(ChatProtocolValues.WHICH_ROOM_CMD) == 0)
{
action = new SocketHelperAction(action_which_room);
}
if ((readdata.ToUpper() + " ").IndexOf(ChatProtocolValues.LIST_CMD) == 0)
{
action = new SocketHelperAction(action_list);
}
if ((readdata.ToUpper() + ":").IndexOf(ChatProtocolValues.PRIVATE_MSG_CMD) == 0)
{
action = new SocketHelperAction(action_private_message);
}
}
else //NON COMMAND
{
//if not a command assign to a mesage sending action
action = new SocketHelperAction(action_send_message);
} //COMMANDS
//perform the action
action();
} //WHILE
}
catch (Exception e)
{
//Trapped exception
Console.WriteLine("The following error is trapped by the chat server");
Console.WriteLine("*************************************************");
Console.WriteLine(e);
Console.WriteLine("*************************************************");
Console.WriteLine("Waiting for Connection...");
}
finally
{
//while loop ended or when there are some other problems
//try to inform client to shut down
try
{
chatserver.Write(client.GetStream(), ChatProtocolValues.QUIT_MSG);
}
catch {}
//if the client had belong to a room
if ((room != 0) && (nickname != ""))
{
//remove user from room
chatserver.RemoveRoomUser(chatserver.RoomUsers[room - 1], nickname);
//inform all that the client has logged out
chatserver.Broadcast(ChatProtocolValues.USER_LOG_OUT(nickname, room));
}
//remove the client connection
try
{
chatserver.RemoveConnection(nickname, client);
}
catch {}
}
}
