private bool hasRecents(ref IEnumerable <DB.StudentRow> different, int mLE)
{
DateTime ahora = DateTime.Now;
Func <DB.StudentRow, bool> recents = o =>
{
if (o.IsDatePresentedNull())
{
return(false);
}
double minutesSince = ahora.Subtract(o.DatePresented).TotalSeconds;
if (minutesSince < mLE)
{
return(true);
}
return(false);
};
IEnumerable <DB.StudentRow> recent = different.Where(recents).ToList(); //examenes recientemente presentados
if (recent.Count() != 0)
{
this.currentStudent = null; //quitar esto de aqui??? porque si el boton validar falla no me deja evaluar
this.currentExam = null;
//el estudiante YA HA SIDO EVALUADO RECIENTEMENTE tal vez ponerlo de primero
// this.inter.StatusHandler?.Invoke(null, EventArgs.Empty);
return(true);
}
else
{
return(false);
}
}
private bool hasGUIDDuplicates(string guid)
{
//
Func <DB.StudentRow, bool> samers = o =>
{
//evaluacion actual tiene mismo examen GUID de una evaluacion ya existente
if (o.IsGUIDNull())
{
return(false);
}
if (o.GUID.CompareTo(guid) == 0)
{
return(true);
}
return(false);
};
IEnumerable <DB.StudentRow> same = this.inter.IdB.Student.Where(samers).ToList(); //lista de repetidos examenes no hay que hacerle la prueba del tiempo?
//como acomodo esto???
if (same.Count() != 0)
{
//AQUIIIIII
this.currentExam = null;
this.currentStudent = null;
//el estudiante YA HA SIDO ASOCIADO AL EXAMEN, tal vez ponerlo de primero
// this.inter.StatusHandler?.Invoke(null, EventArgs.Empty);
// deberia guardar una lista de estos intentos!!!!
return(true); //SALTE
}
return(false);
}
private int getStudentListID(int dAP)
{
// DB.TAM.StuListTableAdapter.FillByStudentIDClass(inter.IdB.StuList, Studentid, clase);
DateTime ahora = DateTime.Now;
Func <DB.StuListRow, bool> timecomparer = o =>
{
if (o.IsDateNull())
{
return(false);
}
double days = ahora.Subtract(o.Date).TotalDays; //dias periodo academico StuList
if (days < dAP)
{
return(true); // menos de 90 dias
}
return(false); // mas de 90
};
DB.StuListRow stu = inter.IdB.StuList.FirstOrDefault(timecomparer);
if (stu == null)
{
this.currentStudent = null;
this.currentExam = null;
return(0); // no le des SLID
}
else
{
return(stu.SLID); //HAY RECIENTE
}
}
public bool AssignExamModel(string res)
{
currentExam = null;
bool validated = false;
Image = null;
string decrypto = Rsx.Encryption.AESThenHMAC.SimpleDecryptWithPassword(res, inter.Password, 0); //decrypt the QR Code!!! importantisimo
if (decrypto == null)
{
return(validated);
}
currentExam = inter.IdB.ExamsList.FirstOrDefault(o => o.GUID.CompareTo(decrypto) == 0);
if (currentExam != null)
{
Image = Tools.CreateQRCode(res, QRSIZE);
validated = true;
}
else
{
this.inter.Status = Resources.QRNoEncontrado;
}
return(validated);
}
private bool hasExpired(int dEG, DateTime examGenerated)
{
DateTime ahora = DateTime.Now;
// DateTime examGenerated =examDateTime ;
//horas elapsadas desde que se generó el examen hasta AHORA
double diascreado = ahora.Subtract(examGenerated).TotalDays;
if (diascreado > dEG) //supera 15 dias
{
this.currentExam = null; //desechalo
this.currentStudent = null;
// this.inter.StatusHandler?.Invoke(null, EventArgs.Empty);
return(true); //SALTE EL EXAMEN EXPIRO!!!
}
return(false);
}
public void OpenFile()
{
try
{
DB.ExamsListRow erow = inter.IBS.CurrentExam;
string destFile = model + erow.GUID + PDF_EXT; //ok
if (erow.IsExamFileNull())
{
return;
}
byte[] arr = erow.ExamFile;
IO.OpenBytesFile(ref arr, destFile, examsPath);
}
catch (Exception ex)
{
inter.Status = "El Examen ya está abierto";
}
}
/*
* public bool Working
* {
*
* set
* {
* if (!value)
* {
* // Exam.CurrentChanged += Exam_CurrentChanged;
* ExamsList.CurrentChanged += currentChanged;
* // Student.CurrentChanged += Exam_CurrentChanged;
* StudentsList.CurrentChanged += currentChanged;
* Questions.CurrentChanged += currentChanged;
* // Answers.CurrentChanged += Exam_CurrentChanged;
* // Preferences.CurrentChanged += Exam_CurrentChanged;
* LogPref.CurrentChanged += currentChanged;
* // Order.CurrentChanged += Exam_CurrentChanged;
* // Class.CurrentChanged += Exam_CurrentChanged;
* // AYear.CurrentChanged += Exam_CurrentChanged;
*
* Topics.CurrentChanged += currentChanged;
* }
* else
* {
* // Exam.CurrentChanged += Exam_CurrentChanged;
* ExamsList.CurrentChanged -= currentChanged;
* // Student.CurrentChanged += Exam_CurrentChanged;
* StudentsList.CurrentChanged -= currentChanged;
* Questions.CurrentChanged -= currentChanged;
* // Answers.CurrentChanged += Exam_CurrentChanged;
* // Preferences.CurrentChanged += Exam_CurrentChanged;
* LogPref.CurrentChanged -= currentChanged;
* // Order.CurrentChanged += Exam_CurrentChanged;
* // Class.CurrentChanged += Exam_CurrentChanged;
* // AYear.CurrentChanged += Exam_CurrentChanged;
*
* Topics.CurrentChanged -= currentChanged;
* }
* }
* }
*/
private void currentChanged(object sender, EventArgs e)
{
if (Working)
{
return;
}
try
{
// DataGridView dgv = sender as DataGridView;
BindingSource bs = sender as BindingSource;
if (bs.Current == null)
{
return;
}
DataRowView view = (bs.Current as DataRowView);
DataRow row = view.Row;
if (row == null)
{
return;
}
// byte[] auxiliar = null;
if (sender.Equals(this.Topics))
{
DB.TopicsRow r = row as DB.TopicsRow;
DB.QuestionsDataTable dt = set.Questions;
Questions.Filter = dt.TopicIDColumn.ColumnName + " = " + r.TopicID;
}
else if (sender.Equals(this.Questions))
{
DB.QuestionsRow r = row as DB.QuestionsRow;
string dt = set.Answers.QIDColumn.ColumnName;
Answers.Filter = dt + " = " + r.QID;
}
else if (sender.Equals(this.RandomQuestions))
{
DB.QuestionsRow r = row as DB.QuestionsRow;
string dt = auxiliar.Answers.QIDColumn.ColumnName;
RandomAnswers.Filter = dt + " = " + r.QID;
}
else if (sender.Equals(this.Exam))
{
string dt = auxiliar.Questions.QIDColumn.ColumnName;
DB.ExamsRow r = row as DB.ExamsRow;
// string[] aux = r.AIDString.Split(',');
RandomQuestions.Position = RandomQuestions.Find(dt, r.QID);
Questions.Position = Questions.Find(dt, r.QID);
}
else if (sender.Equals(this.StudentsList))
{
DB.StuListRow r = row as DB.StuListRow;
DB.StudentDataTable dt = set.Student;
Student.Filter = dt.EIDColumn.ColumnName + " = " + r.SLID;
// DB.TAM.ExamsTableAdapter.FillByEID(dt, r.EID);
}
else if (sender.Equals(this.ExamsList))
{
DB.ExamsListRow r = row as DB.ExamsListRow;
// DB.ExamsDataTable dt = set.Exams;
Exam.Filter = auxiliar.Exams.EIDColumn.ColumnName + " = " + r.EID;
Working = true;
auxiliar.PopulateExamQuestions(ref r);
Working = false;
Exam.MoveFirst();
}
else if (sender.Equals(this.LogPref))
{
DB.PreferencesRow r = row as DB.PreferencesRow;
DB.ExamsListDataTable dt = set.ExamsList;
ExamsList.Filter = dt.PIDColumn.ColumnName + " = " + r.PID;
DB.TAM.ExamsListTableAdapter.FillByPID(dt, r.PID);
/*
* if (!r.IsELDataNull())
* {
* // string pid = ExasmPath + r.PID.ToString() + ".xml";
* auxiliar = r.ELData;
* Tables.ReadDTBytes(ExasmPath,ref auxiliar, ref dt);
* }
* else
* {
* DB.TAM.ExamsListTableAdapter.FillByPID(dt, r.PID);
* // MakeTableBytes(ref r);
* }
*/
}
}
catch (SystemException ex)
{
}
}
private void evaluateStudent()
{
string provided = currentStudent.LProvided;
string TrueAns = currentStudent.ExamsListRow.CLAnswer; //take the encripted answer
TrueAns = Rsx.Encryption.AESThenHMAC.SimpleDecryptWithPassword(TrueAns, inter.Password, 0); //decripta
Tools.StripAnswer(ref TrueAns);
string[] split = currentStudent.ExamsListRow.LQuestion.Split(SEP2);
double factor = Convert.ToDouble(split[1]);
string[] weights = split[0].Split(SEP);
int[] ws = weights.Select(o => Convert.ToInt32(o)).ToArray();
IList <int> errorArray = new List <int>();
double puntos = 0;
int correct = 0;
int i = 0;
double puntosTotal = 0;
for (i = 0; i < provided.Length; i++)
{
char c = provided[i];
char a = TrueAns[i];
double puntosQuestion = ws[i] * factor;
puntosTotal += puntosQuestion;
if (c == a)
{
puntos += puntosQuestion;
correct++;
}
else if (c.Equals('0'))
{
continue;
}
else
{
errorArray.Add(i + 1);
}
}
string error = string.Empty;
currentStudent.Error = error;
if (errorArray.Count != 0)
{
foreach (int x in errorArray)
{
error += x.ToString() + SEP.ToString();
}
if (error[error.Length - 1].Equals(SEP))
{
currentStudent.Error = error.Substring(0, error.Length - 1);
}
}
currentStudent.Score = (double)Decimal.Round(Convert.ToDecimal(puntos), 1);
currentStudent.Obs = string.Empty; //nada aun
currentStudent.Correct = correct;
currentStudent.DatePresented = DateTime.Now;
//mejorar esto
// currentStudent.ExamsListRow.Questions = currentStudent.ExamsListRow.GetExamsRows().Count();
// currentStudent.ExamsListRow.Points = Decimal.Round(Convert.ToDecimal(puntosTotal),3);
// this.picBox.Image = null;
DB.TAM.StudentTableAdapter.Update(this.inter.IdB.Student);
this.currentStudent = null; // reset values
this.currentExam = null; //reset asignments
}
