//updates the leaderboard listview
public void showLeaderBoard()
{
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Background, new Action(() =>
{
leaderboard.Clear();
using (var context = new NetworkedCheckersContainer())
{
var query = from highscore in context.Highscores orderby highscore.MoveCount ascending select highscore;
foreach (var highscore in query)
{
string highscoreString = "";
highscoreString += highscore.User.UserName;
highscoreString += " ";
highscoreString += highscore.MoveCount;
highscoreString += " ";
highscoreString += highscore.DateTime;
leaderboard.Add(highscoreString);
}
}
}
));
}
public void HandleRequests()
{
var endPoint = new IPEndPoint(IPAddress.Any, networkPort);
while (true)
{
var requestBytes = udpServer.Receive(ref endPoint);
var request = Encoding.UTF8.GetString(requestBytes);
var response = "ERROR";
//process the request
//if login request, check username and password
if (Regex.Match(request, @"^LOGIN,[A-Za-z]+,[A-Za-z0-9]+$").Success)
{
string[] requestArray = request.Split(',');
using (var context = new NetworkedCheckersContainer())
{
var query = from user in context.Users select user;
foreach (var user in query)
{
if (requestArray[1].Equals(user.UserName) && requestArray[2].Equals(user.Password) && user.LoginStatus == false)
{
user.LoginStatus = true;
//create string of online users
string allUser = "";
foreach (var userObj in query)
{
if (userObj.LoginStatus == true)
{
allUser += userObj.UserName;
allUser += ":";
}
}
allUser = allUser.Remove(allUser.Length - 1);
BroadcastMessages("USERS," + allUser);
response = "OKAY";
break;
}
}
context.SaveChanges();
}
}
//if logoff request
else if (Regex.Match(request, @"^LOGOUT,[A-Za-z]+$").Success)
{
string[] requestArray = request.Split(',');
using (var context = new NetworkedCheckersContainer())
{
var query = from user in context.Users select user;
foreach (var user in query)
{
//change the login status of the designated user to false
if (user.UserName == requestArray[1] && user.LoginStatus == true)
{
user.LoginStatus = false;
break;
}
}
context.SaveChanges();
//create string of online users
string allUser = "";
foreach (var user in query)
{
if (user.LoginStatus == true)
{
allUser += user.UserName;
allUser += ":";
}
}
if (allUser != "")
{
allUser = allUser.Remove(allUser.Length - 1);
}
BroadcastMessages("USERS," + allUser);
response = "OKAY";
}
}
else
{
switch (gamestate)
{
case GameState.WAIT_FOR_GAME_START:
if (Regex.Match(request, @"^PLAY,[A-Za-z]+,[A-Za-z]+$").Success)
{
string[] requestArray = request.Split(',');
p1Name = requestArray[1];
p2Name = requestArray[2];
if (p1Name != p2Name)
{
//set move count to 0
gameMoveCount = 0;
//set board to initial position
board.resetBoard();
gamestate = GameState.Player1_MOVING;
BroadcastMessages("GAMESTATE," + board.GetPieces());
BroadcastMessages("GAMESTART," + p1Name + "," + p2Name);
BroadcastMessages("STATUS," + p1Name + ",MOVING");
BroadcastMessages("STATUS," + p2Name + ",WAITING");
response = "OKAY";
}
}
break;
case GameState.Player1_MOVING:
if (Regex.Match(request, @"^TRY,[A-Za-z]+,[1-8][1-8],[1-8][1-8]$").Success)
{
string[] requestArray = request.Split(',');
//check whether this is the player's turn to move
if (requestArray[1].Equals(p1Name))
{
//check whether the move is valid
if (board.IsValidMovePlayer1(requestArray[2] + "," + requestArray[3]))
{
//move the piece
board.Move(requestArray[2], requestArray[3], Piece.PLAYER1);
gameMoveCount++;
BroadcastMessages("GAMESTATE," + board.GetPieces());
BroadcastMessages("STATUS," + p2Name + ",MOVING");
BroadcastMessages("STATUS," + p1Name + ",WAITING");
response = "DONE";
//check whether the player win after the move
if (board.isP1Win())
{
gamestate = GameState.GAME_OVER;
Record("Game Over. Player 1 Wins");
BroadcastMessages("STATUS," + p1Name + ",WON");
BroadcastMessages("STATUS," + p2Name + ",LOST");
using (var context = new NetworkedCheckersContainer())
{
//identify the winning user from database
var p1User = from user in context.Users where user.UserName.Equals(p1Name) select user;
//add new highscore to Highscores table
var highscore = new Highscore()
{
DateTime = DateTime.Now.ToString(),
MoveCount = (Int16)gameMoveCount,
User = p1User.First()
};
context.Highscores.Add(highscore);
context.SaveChanges();
}
showLeaderBoard();
}
else
{
gamestate = GameState.Player2_MOVING;
}
}
}
}
break;
case GameState.Player2_MOVING:
if (Regex.Match(request, @"^TRY,[A-Za-z]+,[1-8][1-8],[1-8][1-8]$").Success)
{
//check whether this is the player's turn to move
string[] requestArray = request.Split(',');
if (requestArray[1].Equals(p2Name))
{
//check whether the move is valid
if (board.IsValidMovePlayer2(requestArray[2] + "," + requestArray[3]))
{
//move the piece
board.Move(requestArray[2], requestArray[3], Piece.PLAYER2);
gameMoveCount++;
BroadcastMessages("GAMESTATE," + board.GetPieces());
BroadcastMessages("STATUS," + p1Name + ",MOVING");
BroadcastMessages("STATUS," + p2Name + ",WAITING");
response = "DONE";
//check whether the player win after the move
if (board.isP2Win())
{
gamestate = GameState.GAME_OVER;
Record("Game Over. Player 2 Wins");
BroadcastMessages("STATUS," + p2Name + ",WON");
BroadcastMessages("STATUS," + p1Name + ",LOST");
//record the win into the database
using (var context = new NetworkedCheckersContainer())
{
//identify the winning user from database
var p2User = from user in context.Users where user.UserName.Equals(p2Name) select user;
//add new highscore to Highscores table
var highscore = new Highscore()
{
DateTime = DateTime.Now.ToString(),
MoveCount = (Int16)gameMoveCount,
User = p2User.First()
};
context.Highscores.Add(highscore);
context.SaveChanges();
}
showLeaderBoard();
}
else
{
gamestate = GameState.Player1_MOVING;
}
}
}
}
break;
case GameState.GAME_OVER:
if (Regex.Match(request, @"^PLAY,[A-Za-z]+,[A-Za-z]+$").Success)
{
gamestate = GameState.WAIT_FOR_GAME_START;
goto case GameState.WAIT_FOR_GAME_START;
}
break;
}
}
//send response
var responseBytes = Encoding.UTF8.GetBytes(response);
udpServer.Send(responseBytes, responseBytes.Length, endPoint);
Record("Request: " + request);
Record("Response: " + response);
Record("New Game State: " + gamestate.ToString());
Record("Current Game State: " + gamestate.ToString());
}
}