public QuestionStat GetQuestionStats(long questionId)
{
using (var redis = RedisManager.GetReadOnlyClient())
{
var result = new QuestionStat
{
VotesUpCount = (int)redis.GetSetCount(QuestionUserIndex.UpVotes(questionId)),
VotesDownCount = (int)redis.GetSetCount(QuestionUserIndex.DownVotes(questionId))
};
result.VotesTotal = result.VotesUpCount - result.VotesDownCount;
return(result);
}
}
public QuestionStat GetQuestionStats(long questionId)
{
using (var redis = RedisManager.GetReadOnlyClient())
{
var result = new QuestionStat
{
VotesUpCount = redis.GetSetCount(QuestionUserIndex.UpVotes(questionId)),
VotesDownCount = redis.GetSetCount(QuestionUserIndex.DownVotes(questionId))
};
result.VotesTotal = result.VotesUpCount - result.VotesDownCount;
return result;
}
}
/// <summary>
/// This is for Endpoint 3 as discussed on Discord
/// </summary>
/// <returns></returns>
public QuizStat[] GetQuizStats()
{
Mutex.WaitOne();
List <Controller.Database.Tables.Quiz> quizzes = GetDbSet <Controller.Database.Tables.Quiz>()
.Include(quiz => quiz.Questions)
.ThenInclude(questionQuiz => questionQuiz.Question)
.ThenInclude(question => question.Questions)
.ThenInclude(questionAttempt => questionAttempt.Account)
.Include(quiz => quiz.Questions)
.ThenInclude(questionQuiz => questionQuiz.Question)
.ThenInclude(question => question.Answers)
.Include(quiz => quiz.Sessions)
.ThenInclude(session => session.Account)
.Where(quiz => quiz.IsCustom == 1 && quiz.Sessions.Count > 0).ToList();
// Process the data now
QuizStat[] quizStats = new QuizStat[quizzes.Count];
for (int i = 0; i < quizStats.Length; i++)
{
Controller.Database.Tables.Quiz quiz = quizzes.ElementAt(i);
Dictionary <string, Student> StudentStat = new Dictionary <string, Student>();
List <int> questionList = quiz.Questions.Select(quizQuestion => quizQuestion.QuestionId).ToList();
foreach (Session session in quiz.Sessions)
{
if (!StudentStat.ContainsKey(session.AccountId))
{
StudentStat.Add(session.AccountId, new Student(questionList, session.Account));
}
}
List <QuestionStat> questionStats = new List <QuestionStat>();
List <string> sessions = quiz.Sessions.Select(x => x.Id).ToList();
var quizStat = new QuizStat();
quizStat.QuizName = quiz.Name;
int questionCount = 0;
foreach (QuestionQuiz questionQuiz in quiz.Questions)
{
QuestionStat questionStat = new QuestionStat();
List <QuestionAttempted> allAttempt = new List <QuestionAttempted>();
Controller.Database.Tables.Question questionEntity = questionQuiz.Question;
questionStat.QuestionId = ++questionCount;
questionStat.QuestionText = questionEntity.Text;
var questionAttemptedForQuiz = questionEntity.Questions.Where(x => sessions.Contains(x.AttemptedFor)).ToList();
var individualAttempts = questionAttemptedForQuiz.GroupBy(x => x.AttemptedBy);
foreach (var studentAttempt in individualAttempts)
{
QuestionAttempted qa = studentAttempt.Last();
allAttempt.Add(qa);
StudentStat[qa.Account.Id].QuestionsAnswers[qa.QuestionId] = qa.AnswerId;
if (qa.Answer.IsCorrect == 1)
{
StudentStat[qa.Account.Id].NumOfCorrect += 1;
}
}
questionStat.CorrectAnswerCount = allAttempt.Where(attempt => attempt.Answer.IsCorrect == 1).Count();
questionStat.CorrectAnswer = questionEntity.Answers.Where(answer => answer.IsCorrect == 1).First().Text;
List <Controller.Database.Tables.Answer> wrongAnswers = questionEntity.Answers.Where(answer => answer.IsCorrect == 0).OrderBy(answer => answer.Id).ToList();
questionStat.WrongAnswerOneCount = allAttempt.Where(attempt => attempt.AnswerId == wrongAnswers.ElementAt(0).Id).Count();
questionStat.WrongAnswerOne = wrongAnswers.ElementAt(0).Text;
questionStat.WrongAnswerTwoCount = allAttempt.Where(attempt => attempt.AnswerId == wrongAnswers.ElementAt(1).Id).Count();
questionStat.WrongAnswerTwo = wrongAnswers.ElementAt(1).Text;
questionStat.WrongAnswerThreeCount = allAttempt.Where(attempt => attempt.AnswerId == wrongAnswers.ElementAt(2).Id).Count();
questionStat.WrongAnswerThree = wrongAnswers.ElementAt(2).Text;
questionStats.Add(questionStat);
}
quizStat.QuestionStats = questionStats.ToArray();
quizStat.StudentAttempted = StudentStat.Values.ToArray();
quizStats[i] = quizStat;
}
Mutex.ReleaseMutex();
return(quizStats);
}
public async Task <IActionResult> Stats(int id)
{
var user = await _userManager.GetUserAsync(HttpContext.User);
var test = await _context.Tests.SingleOrDefaultAsync(t => t.Id == id);
if (test.CreatedById != user.Id)
{
Forbid();
}
var questions = _context.Questions.Where(q => q.TestId == test.Id && !q.IsDeleted);
var stat = new Stat {
TestName = test.Name, TestId = test.Id
};
foreach (var question in questions)
{
QuestionStat questionStat = new QuestionStat
{
QuestionId = question.Id,
QuestionType = question.GetTypeString(),
QuestionTitle = question.Title
};
var answersForQuestion = _context.Answers.Where(a => a.QuestionId == question.Id);
questionStat.MaxScore = question.Score;
float averageSum = 0, derivationSum = 0;
int n = 0;
foreach (var answer in answersForQuestion)
{
switch (answer.Result)
{
case null:
{
questionStat.NullCount++;
break;
}
case AnswerResult.Wrong:
{
questionStat.WrongCount++;
break;
}
case AnswerResult.PartiallyRight:
{
questionStat.PartiallyRightCount++;
break;
}
case AnswerResult.Right:
{
questionStat.RightCount++;
break;
}
}
n++;
averageSum += answer.Score;
derivationSum += answer.Score * answer.Score;
}
var average = averageSum / n;
var derivationSumAverage = derivationSum / n;
var stDer = Math.Sqrt(derivationSumAverage - (average * average));
questionStat.AverageScore = (float)Math.Round(average, 2);
questionStat.ScoreStandartDerivation = (float)Math.Round(stDer, 2);
stat.QuestionStats.Add(questionStat);
}
stat.MostDifficult = questions.SingleOrDefault(x => x.Id == stat.GetMostDifficultId());
stat.MostEasy = questions.SingleOrDefault(x => x.Id == stat.GetMostEasyId());
return(View("Stat", stat));
}
