//method: GetLeaderBoard
//description: retrieves leaderboard information
//returns: void
public void GetLeaderboard()
{
if(stopped) return;
Task.Factory.StartNew(() => {
try {
lock (socketLock) {
//request leaderboard
writer.WriteLine("GET_LEADERBOARD");
writer.Flush();
//get leaderboard
List<UserSession> rows = new List<UserSession>();
while(reader.PeekLine() != null && reader.PeekLine().StartsWith("SESSIONID:")) {
UserSession r = new UserSession();
r.sessionId = int.Parse(reader.ReadLine().Substring("SESSIONID:".Length));
r.userName = reader.ReadLine().Substring("USERNAME:"******"SCORE:".Length));
rows.Add(r);
}
string writerDump = reader.ReadLine(); //dump for "DONE" string from server
owner.Invoke((MethodInvoker)(
() => { LeaderboardReceived(this, rows); }
));
}
} catch(Exception) {
stopped = true;
socket.Close();
owner.Invoke((MethodInvoker)(() => { ConnectionLost(this, new EventArgs()); }));
}
});
}
//method: ConnectionReader
//description: reads data from the server
//params: none
//returns: void
private void ConnectionReader()
{
try {
while(!stopped) {
if(reader.PeekLine().StartsWith("QUESTION:")) {//QUESTION
//get question
QuestionEventArgs question = new QuestionEventArgs();
question.questionText = reader.ReadLine().Substring("QUESTION:".Length);
//get answers
question.answers = new List<string>();
while(reader.PeekLine().StartsWith("ANSWER:")) {
question.answers.Add(reader.ReadLine().Substring("ANSWER:".Length));
}
question.timeLimit = int.Parse(reader.ReadLine().Substring("TIME:".Length));
owner.Invoke((MethodInvoker)(
() => { QuestionReceived(this, question); }
));
} else if(reader.PeekLine().StartsWith("RESULT:")) {//QUESTION RESULTS
List<QuestionResult> results = new List<QuestionResult>();
while(reader.PeekLine().StartsWith("RESULT:")) {
QuestionResult r = new QuestionResult();
r.questionText = reader.ReadLine().Substring("RESULT:".Length);
r.correctAnswer = reader.ReadLine();
r.userAnswer = reader.ReadLine();
r.score = int.Parse(reader.ReadLine());
results.Add(r);
}
owner.Invoke((MethodInvoker)(
() => { ResultsReceived(this, results); }
));
} else if(reader.PeekLine().StartsWith("SESSIONID:")) {//LEADERBOARD
List<UserSession> rows = new List<UserSession>();
while(reader.PeekLine() != null && reader.PeekLine().StartsWith("SESSIONID:")) {
UserSession r = new UserSession();
r.sessionId = int.Parse(reader.ReadLine().Substring("SESSIONID:".Length));
r.userName = reader.ReadLine().Substring("USERNAME:"******"SCORE:".Length));
rows.Add(r);
}
owner.Invoke((MethodInvoker)(
() => { LeaderboardReceived(this, rows); }
));
} else if(reader.PeekLine().StartsWith("YOUR_SESSIONID:")) {
int sessionId = int.Parse(reader.ReadLine().Substring("YOUR_SESSIONID:".Length));
owner.Invoke((MethodInvoker)(
() => { SessionIdReceived(this, sessionId); }
));
} else {
//nothing we can handle
reader.ReadLine();//consume
}
Thread.Sleep(50);
}
} catch (Exception ex) {
if(ex is ArgumentException || ex is SocketException || ex is IOException || ex is NullReferenceException) {
stopped = true;
owner.Invoke((MethodInvoker)(
() => { ConnectionLost(this, new EventArgs()); }
));
} else {
throw;
}
} finally {
socket.Close();
}
}
