public async Task <Dictionary <int, int> > GetQuizForLectureAlailability(int disciplineId)
{
var studentId = AccountCredentials.GetStudentId();
return(await(from itp in _context.IndividualQuizPasseds
where !itp.IsPassed && itp.StudentId == studentId && itp.DisciplineId == disciplineId
select new { itp.LectureId, itp.Id }).ToDictionaryAsync(td => td.LectureId, td => td.Id));
}
public async Task <RealTimeQuizViewModel> GetRealtimeQnA(int moduleHistoryId)
{
var student = await AccountCredentials.GetStudent();
bool studentCanPass = await _studentPageHelper.StudentCanPass(moduleHistoryId, student.Id);
if (studentCanPass)
{
RealTimeQuizViewModel qnA = new RealTimeQuizViewModel();
if (await _context.RealtimeModulesPasseds.AnyAsync(smp =>
smp.StudentId == student.Id && smp.ModuleHistoryId == moduleHistoryId))
{
return(qnA);
}
ModuleHistory moduleHistory =
await _context.ModuleHistories.SingleOrDefaultAsync(mh => mh.Id == moduleHistoryId);
int lectureId = _context.LecturesHistories.Where(lh => lh.Id == moduleHistory.LectureHistoryId)
.Select(lh => lh.LectureId).SingleOrDefault();
var question = await _context.Questions.Where(q => q.ModuleId == moduleHistory.ModuleId && q.QuestionType == QuestionType.RealtimeId &&
!_context.RealtimeResponses.Where(r => r.ModuleHistoryId == moduleHistoryId &&
r.StudentId == student.Id).Select(r => r.QuestionId).Contains(q.Id))
.OrderBy(q => Guid.NewGuid()).FirstOrDefaultAsync();
if (question == null)
{
await ResovlePassedRealtimeQuiz(moduleHistory.ModuleId, student.Id, moduleHistoryId, lectureId);
return(qnA);
}
qnA = new RealTimeQuizViewModel
{
Question = question,
Student = student,
Answers = await GetAnswersList(question.Id),
LectureHistoryId = moduleHistory.LectureHistoryId,
ModuleHistoryId = moduleHistoryId
};
return(qnA);
}
return(null);
}
public async Task StartLecture(ReasignViewModel model)
{
var disc = model.Disciplines[0].Id;
var lect = model.Lectures[0].Id;
var date = DateTime.UtcNow;
var lector = await AccountCredentials.GetLector();
var lectureHistory = _db.LecturesHistories.Add(new LecturesHistory
{
LectureId = lect,
DisciplineId = disc,
StartTime = date,
IsFrozen = false,
LectorId = lector.Id
});
await _db.SaveChangesAsync();
_db.ModuleHistories.AddRange(
from m in await _db.Modules.ToListAsync()
where m.LectureId == lect
select new ModuleHistory
{
IsPassed = false,
LectureHistoryId = lectureHistory.Id,
ModuleId = m.Id,
StartTime = null,
LectorId = lector.Id
});
_db.LectureHistoryGroups.AddRange(
from g in model.Groups
where g.IsSelected
select new LectureHistoryGroup
{
GroupId = g.Id,
LectureHistoryId = lectureHistory.Id
});
await _db.SaveChangesAsync();
}
public async Task <IEnumerable <DiscLectorCumulativeCheckViewModel> > StudentsDisciplinesList()
{
var studentId = AccountCredentials.GetStudentId();
List <DiscLectorCumulativeCheckViewModel> model =
await(from d in _db.Disciplines
join sd in _db.StudentDisciplines on d.Id equals sd.DisciplineId
where sd.StudentId == studentId
join cq in _db.CumulativeQuizPasseds on sd.DisciplineId equals cq.DisciplineId into cqsjoin
from cqs in cqsjoin.DefaultIfEmpty()
where cqs.StudentId == studentId || cqs == null
join ld in _db.LectorDisciplines on d.Id equals ld.DisciplineId
join l in _db.Lectors on ld.LectorId equals l.Id into lectjoin
select new DiscLectorCumulativeCheckViewModel()
{
DiscId = d.Id,
DiscName = d.Name,
Lectors = lectjoin,
CumulativeQuizId = cqs.IsPassed != true && cqs != null ? cqs.Id : (int?)null
}).ToListAsync();
return(model);
}