public (List <List <int> > answers, MCQPaperDTO paper) GetMcqPaper(string code)
{
MCQPaper paper = PaperRepo.GetByPaperCode(code);
if (paper == null)
{
return(null, null);
}
List <List <int> > answerstobenoted = new List <List <int> >();
MCQPaperDTO paperdto = new MCQPaperDTO();
paperdto = Mapper.Map(paper, paperdto);
foreach (var que in paper.Questions)
{
que.MCQOptions.Shuffle();
List <int> add = new List <int>();
foreach (var opt in que.MCQOptions)
{
add.Add(opt.MCQOptionId);
}
answerstobenoted.Add(add);
paperdto.Questions.Add(Mapper.Map <MCQQuestion, MCQQuestionDTO>(que));
}
paperdto.Questions.ForEach(que => que.TrueAnswer = -1);
return(answerstobenoted, paperdto);
}
public async Task <MCQPaper> Create(MCQPaper paper)
{
List <MCQOption> temp = new List <MCQOption>();
foreach (var que in paper.Questions)
{
temp.Add(que.TrueAnswer);
que.TrueAnswer = null;
}
using (var transaction = await AppDbContext.Database.BeginTransactionAsync())
{
try
{
AppDbContext.Add(paper);
AppDbContext.SaveChanges();
var i = 0;
foreach (var que in paper.Questions)
{
que.TrueAnswer = temp[i++];
}
AppDbContext.MCQPapers.Attach(paper);
AppDbContext.SaveChanges();
await transaction.CommitAsync();
}
catch (Exception)
{
await transaction.RollbackAsync();
}
}
return(paper);
}
public string CreateMCQPaper(MCQPaperDTO paper)
{
string code = CodeGenerator.GetSharableCode(EPaperType.MCQ);
MCQPaper mcqPaper = Mapper.Map <MCQPaperDTO, MCQPaper>(paper);
mcqPaper.PaperCode = code;
foreach (var que in paper.Questions)
{
mcqPaper.Questions.Add(Mapper.Map <MCQQuestionDTO, MCQQuestion>(que));
}
McqPaperRepo.Create(mcqPaper);
string linktosend = $"https://localhost:44394/Teacher/PaperDetails/{code}";
EmailService.SendMailForPaper(code, linktosend, paper.PaperTitle, paper.CreatedDate.ToString(), paper.DeadLine.ToString(), paper.TeacherEmailId);
//sends mail regarding paper update
return(code);
}
public MCQPaper GetByPaperCode(string paperCode)
{
MCQPaper ans = null;
using (var transaction = AppDbContext.Database.BeginTransaction())
{
try
{
ans = AppDbContext.MCQPapers
.FirstOrDefault(paper => paper.PaperCode == paperCode);
if (ans == null)
{
transaction.Commit();
return(null);
}
ans.Questions =
AppDbContext.MCQQuestions
.Include(que => que.TrueAnswer)
.Where(que => que.MCQPaper.PaperCode == paperCode)
.ToList();
foreach (var que in ans.Questions)
{
que.TrueAnswer = que.MCQOptions[0];
que.MCQOptions = AppDbContext.MCQOptions
.Where(opt => opt.MCQQuestionId == que.QuestionId)
.ToList();
}
transaction.Commit();
}
catch (Exception)
{
transaction.Rollback();
}
}
return(ans ?? new MCQPaper());
}
