public static byte[] GetExamTimeForStudent(StudentInformation student)
{
student.ExamStartTime = GetStartTime();
student.ExamEndTime = GetEndTime();
return(GetByteArrayFromObject(student));
}
public static byte[] GetQuestionForStudent(StudentInformation student)
{
var file = FullQuestionFilePath;
var fileData = File.ReadAllBytes(file);
//var examStartedMessage =
//string.Format("Exam has started! Please save the question file and click finish when done!");
var examStartedMsg = string.Format("Your exam is started. please save the question file!");
var studentInfo = new StudentInformation
{
StudentId = student.StudentId,
ServerIPAddress = student.ServerIPAddress,
//ExamTime = student.ExamTime,
ExamStartTime = student.ExamStartTime,
ExamEndTime = student.ExamEndTime,
IsAlreadyRegistered = student.IsAlreadyRegistered,
IsExamStarted = student.IsExamStarted,
ExamStartedMessage = examStartedMsg,
IsStudentIdValid = student.IsStudentIdValid,
StudentAlreadyRegisteredMessage = student.StudentAlreadyRegisteredMessage,
QuestionFileData = fileData
};
var serverData = GetByteArrayFromObject(studentInfo);
return(serverData);
}
public static void CreateStudentDirectory(StudentInformation student)
{
var path = Path.Combine(StudentAnswerFolder, student.StudentId.ToString());
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
GrantAccess(path);
}
}
public static byte[] GetConnectionMessageForStudent()
{
var msg = string.Format(
"Connection successful!");
var connectionMessage = new StudentInformation
{
ConnectionSuccessfulMessage = msg,
ServerOperationType = ServerOperationType.ConnectionSuccessful
};
return(GetByteArrayFromObject(connectionMessage));
}
public static byte[] ConvertMessageToByteArray(StudentInformation obj)
{
if (obj == null)
{
return(null);
}
var bf = new BinaryFormatter();
var ms = new MemoryStream();
bf.Serialize(ms, obj);
return(ms.ToArray());
}
public static byte[] GetInValidStudentIdMessage(StudentInformation student)
{
student.IsStudentIdValid = false;
var studentIdStart = int.Parse(ConfigurationManager.AppSettings["StudentIdRangeStart"]);
var studentIdEnd = int.Parse(ConfigurationManager.AppSettings["StudentIdRangeEnd"]);
student.StudentIdInvalidMessage =
string.Format("Invalid Student Id! Please Send a valid studentId in the range from {0} to {1}",
studentIdStart, studentIdEnd);
var data = GetByteArrayFromObject(student);
return(data);
}
public static void AddStudentToList(StudentInformation studentInformation)
{
var studentModel = new StudentModel
{
StudentId = studentInformation.StudentId,
ExamEndTime = studentInformation.ExamEndTime,
ExamStartTime = studentInformation.ExamStartTime,
ExamTime = DateTime.UtcNow,
IsExamFinished = false,
IsBackupAvailable = false,
StudentIpAddress = studentInformation.ServerIPAddress,
ActualAnswerFilePath = Path.Combine(StudentAnswerFolder, studentInformation.StudentId.ToString())
};
ConnectedStudentList.Add(studentInformation.StudentId, studentModel);
}
public static void SaveAnswerIntoServer(StudentInformation student)
{
/*if (student.OperationType == 0)
* {
* if (!Directory.Exists(student.StudentId.ToString()))
* {
* Directory.CreateDirectory(student.StudentId.ToString());
*
* StudentList.Add(student.StudentId, student);
*
*
* //TODO new implementation
*
* var studentDb = new Student()
* {
* StudentId = student.StudentId,
* ExamStartTime = examStartTime,
* ExamEndTime = examEndTime
* };
*
* dataService.CreateStudentIfNotExists(studentDb);
* }
*
* }*/
if (student.OperationType == OperationType.ClientAnswer)
{
// TODO; file Save
var dirName = student.StudentId.ToString();
var filePath = Path.Combine(dirName, dirName + ".txt");
if (Directory.Exists(dirName))
{
//File.WriteAllBytes(filePath, student.FileData);
}
// TODO new implementation. save answer
var studentDb = new Student()
{
StudentId = student.StudentId, ExamTime = DateTime.UtcNow
};
dataService.UpdateStudent(studentDb);
}
}
public static StudentInformation GetStudentInformationFromConnectedList(int studentId)
{
StudentModel studentModel = null;
ConnectedStudentList.TryGetValue(studentId, out studentModel);
if (studentModel == null)
{
return(null);
}
var student = new StudentInformation
{
StudentId = studentModel.StudentId,
ServerIPAddress = studentModel.StudentIpAddress,
};
return(student);
}
public static void SaveStudentInformation(StudentInformation student)
{
if (student.OperationType == 0)
{
if (!Directory.Exists(student.StudentId.ToString()))
{
Directory.CreateDirectory(student.StudentId.ToString());
StudentList.Add(student.StudentId, student);
// TODO new implementation
var studentDb = new Student()
{
StudentId = student.StudentId,
ExamStartTime = GetStartTime(),
ExamEndTime = GetEndTime()
};
dataService.CreateStudentIfNotExists(studentDb);
}
}
}
