//updaUserState:
//
private void UpdateUserState(HomeworkState state)
{
RemoveUserState(state.UserId, state.HomeworkId);
//add new state
_homeworkStateDb.DbSet.Add(state);
_homeworkStateDb.SaveChanges();
}
public void UpdateMark(ref HomeworkState state, int questionId, string userAnswer)
{
Question question = _questionDb.GetQuestionById(questionId);
int questionSign = (question.correctAnswerNum == userAnswer)? 1 : -1;
// if the answer right add the level number to mark other sub level number from mark
state.Mark += questionSign * question.level;
}
public ActionResult HomeWorkMaterial(int homeworkId, string a)
{
ViewBag.homeworkId = homeworkId;
int userId = _userDb.GetUserIdByUsername(User.Identity.Name);
HomeworkState state = GetUserState(userId, homeworkId);
state.QuestionNumber = 0;
UpdateUserState(state);
return(RedirectToAction("HomeWorkLastStage", new{ state.HomeworkId }));
}
//GET: /HomeWorks/HomeWorkMaterial
//
public ActionResult HomeWorkMaterial(int homeworkId)
{
ViewBag.homeworkId = homeworkId;
int userId = _userDb.GetUserIdByUsername(User.Identity.Name);
HomeworkState state = GetUserState(userId, homeworkId);
Material material = _algorithm.GetMatrial(state.SubjectId);
ViewBag.material = material;
return(View());
}
public ActionResult HomeworkFirstStage(int homeworkId, int questionId, string userAnswer)
{
ViewBag.homeworkId = homeworkId;
int userId = _userDb.GetUserIdByUsername(User.Identity.Name);
HomeworkState state = GetUserState(userId, homeworkId);
_algorithm.UpdateMark(ref state, questionId, userAnswer);
UpdateUserState(state);
return(RedirectToAction("HomeworkFirstStage", new{ homeworkId }));
}
public Question GetNextQuestion(HomeworkState state, int userId)
{
List <int> solvedQuestionIdList = GetSolvedQuestionIdList(state.SubjectId, userId);
List <Question> questionList = _questionDb.GetQuestionListBySubjectId(state.SubjectId);
List <Question> unSolvedQuestionList = questionList.Where(question => !solvedQuestionIdList.Contains(question.id)).ToList();
if (!unSolvedQuestionList.Any())
{
throw new UnSolvedQuestionNotFoundException();
}
return(unSolvedQuestionList.First());
}
//GET: HomeworkFirstStage:
//when we go down in tree subject we will be in FirstStage
//otherWise we are in LastStage
public ActionResult HomeworkFirstStage(int homeworkId)
{
ViewBag.homeworkId = homeworkId;
int userId = _userDb.GetUserIdByUsername(User.Identity.Name);
HomeworkState state = GetUserState(userId, homeworkId);
HomeworkState nextState = new HomeworkState(GetUserState(userId, homeworkId));
//update mark,and check if we need to go to children subject
if (_algorithm.IsGoDown(ref nextState))
{
List <int> subjectChildrenIds = _subjectDb.GetChildren(state.SubjectId);
try {
nextState.SubjectId = GetAvailableSubject(subjectChildrenIds);
nextState.Mark = 0;
nextState.QuestionNumber = 0;
}
catch (SubjectNotFoundException)
{
return(RedirectToAction("HomeworkMaterial", new { state.HomeworkId }));
}
}
else
{
//check if we Finish the current Level, and go Up.
if (state.QuestionNumber >= _algorithm.MaxNumberOfStageQuestion)
{
//if we get to the base subject mean we finish Exam
if (state.SubjectId == state.BaseSubjectId)
{
return(RedirectToAction("PreSolveHomeWork", new{ baseSubjectIndex = state.IndexOfBaseSubject + 1,
homeWorkId = state.HomeworkId }));
}
else
{
nextState.SubjectId = _subjectDb.GetSubjectParentId(state.SubjectId);
nextState.Mark = -100; //TODO: need to change that we fail
UpdateUserState(nextState);
return(RedirectToAction("HomeworkFirstStage", new { state.HomeworkId }));
}
}
}
//continue with the next state.
ViewBag.question = _algorithm.GetNextQuestion(nextState, userId);
nextState.QuestionNumber++;
UpdateUserState(nextState);
return(View());
}
//HomeWorkLastStage
//in LastStage: we give questions with solution
public ActionResult HomeWorkLastStage(int homeworkId)
{
ViewBag.homeworkId = homeworkId;
int userId = _userDb.GetUserIdByUsername(User.Identity.Name);
HomeworkState state = GetUserState(userId, homeworkId);
HomeworkState nextState = new HomeworkState(GetUserState(userId, homeworkId));
if (_algorithm.MaxNumberOfStageQuestion <= state.QuestionNumber)
{
state.Mark = 0;
UpdateUserState(state);
return(RedirectToAction("HomeWorkFirstStage", new{ homeworkId }));
}
ViewBag.question = _algorithm.GetNextQuestion(state, userId);
nextState.QuestionNumber++;
UpdateUserState(nextState);
return(View());
}
public ActionResult SolveHomework(int baseSubjectIndex, int subjectId, int homeworkId)
{
int userId = _userDb.GetUserIdByUsername(User.Identity.Name);
if (IsHomeworkSolved(homeworkId, userId))
{
return(RedirectToAction("HomeworkSolved", new { homeworkId }));
}
//send First parameters to start homeWork
HomeworkState newState = new HomeworkState(userId, baseSubjectIndex, subjectId, subjectId, 0, 0, homeworkId, 0);
//if state exist ,update else create
if (IsUserStateExist(newState.UserId, newState.HomeworkId))
{
UpdateUserState(newState);
}
else
{
CreateUserState(newState);
}
return(RedirectToAction("HomeworkFirstStage", new { homeworkId }));
}
//CreateUserState
//
private void CreateUserState(HomeworkState state)
{
_homeworkStateDb.DbSet.Add(state);
_homeworkStateDb.SaveChanges();
}
public bool IsGoDown(ref HomeworkState state) // TODO: why ref? you're not changing the variable state.
{
return(state.Mark < -3);
}
