public async Task <RealTimeQuizViewModel> SaveResponse(RealTimeQuizViewModel quizVM, int responseId)
{
if (await _context.ModuleHistories.AnyAsync(mh => mh.ModuleId == quizVM.ModuleHistoryId && mh.IsPassed))
{
return(null);
}
if (await _context.RealtimeResponses.AnyAsync(r =>
r.ModuleHistoryId == quizVM.ModuleHistoryId && r.StudentId == quizVM.Student.Id &&
r.QuestionId == quizVM.Question.Id))
{
return(await _quizManager.UpdateQuizModel(quizVM));
}
RealtimeRespons response = new RealtimeRespons
{
AnswerId = responseId,
LectureHistoryId = quizVM.LectureHistoryId,
ModuleHistoryId = quizVM.ModuleHistoryId,
QuestionId = quizVM.Question.Id,
StudentId = quizVM.Student.Id,
GroupId = quizVM.Student.GroupId
};
_context.RealtimeResponses.Add(response);
await _context.SaveChangesAsync();
Clients.All.ResponseRecieved();
return(await _quizManager.UpdateQuizModel(quizVM));
}
public async Task ResovlePassedRealtimeQuiz(int moduleId, int studentId, int moduleHistoryId, int lectureId)
{
_context.RealtimeModulesPasseds.Add(new RealtimeModulesPassed()
{
ModuleId = moduleId,
StudentId = studentId,
ModuleHistoryId = moduleHistoryId
});
var passedModules =
await(from m in _context.Modules
where m.LectureId == lectureId
join rtmp in _context.RealtimeModulesPasseds on m.Id equals rtmp.ModuleId into groupjoin
from gj in groupjoin.DefaultIfEmpty()
where gj == null || gj.StudentId == studentId
select gj).ToListAsync();
if (passedModules.All(a => a != null))
{
if (await _context.IndividualQuizPasseds.AnyAsync(iqp => iqp.LectureId == lectureId && iqp.StudentId == studentId))
{
return;
}
IndividualQuizPassed individualTestsPassed = new IndividualQuizPassed()
{
DisciplineId = _context.Lectures.Where(w => w.Id == lectureId).Select(s => s.DisciplineId)
.SingleOrDefault(),
IsPassed = false,
LectureId = lectureId,
StudentId = studentId
};
_context.IndividualQuizPasseds.Add(individualTestsPassed);
}
await _context.SaveChangesAsync();
}
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();
}