public frmMain()
{
InitializeComponent();
this.Width = 613; // Set client width
this.Height = 302; // Set client height
mSettings = new Settings();
mUser = new User();
mQuestion = new question();
mAnswer = new Answer();
mDictionarySerialiser = new DictionarySerialiserMethods();
if (LoadUserSettings("usersettings.xml") == false)
{
mSettings.UserName = "******";
mSettings.ServerIP = txtServerAddress.Text;
mSettings.ServerPort = txtServerPort.ToString();
mSettings.AutoLogin = false;
SaveUserSettings(mSettings);
}
else
{
if (mSettings.AutoLogin == true)
StartConnectionThread();
else
{
txtUsername.Text = mSettings.UserName;
txtServerAddress.Text = mSettings.ServerIP;
txtServerPort.Text = mSettings.ServerPort;
chkStayLoggedIn.Checked = mSettings.AutoLogin;
}
}
}
// New XML based Login system
private void TutorLogin(string prUsername, string prPassword)
{
DictionarySerialiserMethods iDictionarySerialiser = new DictionarySerialiserMethods();
transferrableUserDetails iUserDetailsToSend = new transferrableUserDetails();
iUserDetailsToSend.Username = prUsername;
iUserDetailsToSend.Password = prPassword;
iUserDetailsToSend.UserRole = "Tutor";
iUserDetailsToSend.DeviceOS = "WIN7";
// Tutor Login
byte[] iData = iDictionarySerialiser.ConvertUserDetailsToByteArray(iUserDetailsToSend);
// Possibly unreliable method of testing. For now assume that if the connection
// is writable that the data was sent.
// TODO: Implement a check of some sort.
if (mStream.CanWrite)
{
mStream.Write(iData, 0, iData.Length);
mLoggedIn = true;
}
else
{
mLoggedIn = false;
}
}
private void SendOutput()
{
DictionarySerialiserMethods iDictionarySerialiser = new DictionarySerialiserMethods();
while (!mShouldStopThread)
{
if (mQuestionManager.QuestionsToSend.Count > 0)
{
// Pop a question off the queue
question iQuestion = mQuestionManager.QuestionsToSend.Dequeue();
byte[] iQuestionArray = iDictionarySerialiser.ConvertQuestionToByteArray(iQuestion);
if (iQuestionArray != null)
mStream.Write(iQuestionArray, 0, iQuestionArray.Length);
}
if (mInstructionStringToSend != null)
{
byte[] iByteArray = System.Text.Encoding.ASCII.GetBytes(mInstructionStringToSend);
mStream.Write(iByteArray, 0, iByteArray.Length);
mInstructionStringToSend = null;
}
if (mChatMessageToSend != null)
{
byte[] iMessageArray = iDictionarySerialiser.ConvertChatMessageToByteArray(mChatMessageToSend);
if (iMessageArray != null)
mStream.Write(iMessageArray, 0, iMessageArray.Length);
Array.Clear(iMessageArray, 0, iMessageArray.Length);
mChatMessageToSend = null;
}
Thread.Sleep(10);
}
}
// Listen for incoming data
public void Listen()
{
Byte[] iData;
string iInputString = "";
DictionarySerialiserMethods iDictionarySerialiser = new DictionarySerialiserMethods();
int iBytesRecv = 0;
while (!mShouldStopThread)
{
try
{
iData = new Byte[32768];
iBytesRecv = mStream.Read(iData, 0, iData.Length);
}
catch (System.Exception ex)
{
// Server has gone offline
mIsConnected = false;
//StopConnections();
break;
}
// Server has gone offline
if (iBytesRecv == 0)
{
mIsConnected = false;
StopConnections();
break;
}
if (iBytesRecv > 0)
{
char iContents = GetDataContents(iData);
if (iContents == 'u') // User
{
mUserManager.UsersOnline = iDictionarySerialiser.ConvertByteArrayToUserDict(iData);
mUserManager.NewUserDataAvailable = true;
}
else if (iContents == 'q') // Question
{
mQuestionManager.QuestionList = iDictionarySerialiser.ConvertByteArrayToQuestionDict(iData);
mQuestionManager.NewQuestionDataAvailable = true;
}
else if (iContents == 'a') // Answer
{
mAnswerManager.AddAnswer(iDictionarySerialiser.ConvertStringToAnswer(new string(Encoding.ASCII.GetChars(iData)).Replace("\0", "")));
}
else if (iContents == 'c') // Connection response
{
mConnectionResponse = new string(Encoding.ASCII.GetChars(iData)).Replace("\0", "");
}
else if (iContents == 'm') // Chat message
{
ChatMessage iNewMessage = iDictionarySerialiser.ConvertStringToChatMessage(
new string(Encoding.ASCII.GetChars(iData)).Replace("\0", ""));
mChatManager.ChatMessages.Enqueue(iNewMessage);
}
Array.Clear(iData, 0, iData.Length);
}
// To prevent the CPU from running at 50-100% constantly sleep the thread for 10 milliseconds
Thread.Sleep(10);
}
}
public frmMain()
{
InitializeComponent();
mMessageLogger = new MessageLogger();
mChatManager = new ChatManager();
mUserManager = new UserManager(mMessageLogger);
mQuestionManager = new QuestionManager(mUserManager);
mAnswerManager = new AnswerManager();
mIOProcessor = new IOProcessor(mMessageLogger, mUserManager,
mQuestionManager, mAnswerManager, mChatManager);
//mIOProcessor = new IOProcessor(mMessageLogger, mUserManager);
mNetwork = new Network(mMessageLogger, mUserManager, mQuestionManager, mAnswerManager, mIOProcessor);
// Load the registered tutors
if (!mUserManager.LoadTutors("tutors.xml"))
{
mMessageLogger.NewMessage("Can't load file \"tutors.xml\" or the contents in it. " +
"Please use the admin tool to recreate it", mMessageLogger.MESSAGE_ERROR);
}
mUser = new User();
mRunning = true;
mDictionarySerialiser = new DictionarySerialiserMethods();
// Attempt to load questions from the questions.xml file
if (LoadQuestions("questions.xml") == false)
{
// Add some demo questions if none could be loaded from a file
question iDemoQuestion = new question();
// Multi-choice
iDemoQuestion.QuestionID = 0;
iDemoQuestion.Question = "How many days in a week?";
iDemoQuestion.QuestionType = "MC";
iDemoQuestion.PossibleAnswers = new string[4] { "Ten", "Three", "Seven", "Nine" };
iDemoQuestion.Answer = "Seven";
mQuestionManager.AddNewQuestion(iDemoQuestion);
// True/False
iDemoQuestion = new question();
iDemoQuestion.QuestionID = 1;
iDemoQuestion.Question = "Fire burns?";
iDemoQuestion.QuestionType = "TF";
iDemoQuestion.PossibleAnswers = new string[4] { "True", "False", "", "" };
iDemoQuestion.Answer = "True";
mQuestionManager.AddNewQuestion(iDemoQuestion);
// Short Answer
iDemoQuestion = new question();
iDemoQuestion.QuestionID = 2;
iDemoQuestion.Question = "What is 5x5?";
iDemoQuestion.QuestionType = "SA";
iDemoQuestion.PossibleAnswers = new string[4] { "", "", "", "" };
iDemoQuestion.Answer = "";
mQuestionManager.AddNewQuestion(iDemoQuestion);
}
mTimer = new System.Timers.Timer(1000);
mTimer.Elapsed += new ElapsedEventHandler(TimeElapsed);
mTimer.Enabled = true;
}
// User authentication
private void AttemptLogin(string prUsername, string prIPAddress, int mPort)
{
DictionarySerialiserMethods iDictionarySerialiser = new DictionarySerialiserMethods();
transferrableUserDetails iUserDetailsToSend = new transferrableUserDetails();
iUserDetailsToSend.Username = prUsername;
iUserDetailsToSend.Password = ""; // Passwords currently not implemented for students
iUserDetailsToSend.UserRole = "Student";
iUserDetailsToSend.DeviceOS = "WIN7";
// Tutor Login
byte[] iData = iDictionarySerialiser.ConvertUserDetailsToByteArray(iUserDetailsToSend);
// Possibly unreliable method of testing. For now assume that if the connection
// is writable that the data was sent.
// TODO: Implement a check of some sort.
if (mStream.CanWrite)
{
mStream.Write(iData, 0, iData.Length);
mLoggedIn = true;
}
else
{
mLoggedIn = false;
}
// Start Listening for data
mListenThread = new Thread(new ThreadStart(ListenForData));
mListenThread.Start();
}
