public async Task <IEnumerable <AttemptDto> > GetTestResultsForStudentAsync(UserDto student, string topicId)
{
await _userValidator.ValidateAsync(student);
return(_attemptService.GetEntitiesByPrincipalId(student.Id)
.Where(a => a.TopicId.Equals(topicId)).ToEnumerable());
}
public async Task <TestModel> GenerateTestForTopicAsync(UserDto student, string topicId)
{
await _userValidator.ValidateAsync(student);
var topic = await _topicService.GetByIdAsync(topicId);
if (topic is null)
{
throw new TestCreationException("There are no topic with this id");
}
var attemptsCount = (await GetTestResultsForStudentAsync(student, topicId)).Count();
if (attemptsCount >= topic.MaxAttemptCount)
{
throw new TestCreationException("You have no available attempts");
}
var topicQuestions = await _questionService.GetEntitiesByPrincipalId(topicId).ToListAsync();
if (topicQuestions.Count < topic.QuestionsPerAttempt)
{
throw new TestCreationException("Topic don't have enough questions for test");
}
List <QuestionDto> testQuestions = new();
while (testQuestions.Count < topic.QuestionsPerAttempt)
{
topicQuestions.Shuffle();
var question = topicQuestions.First();
if (testQuestions.Contains(question))
{
continue;
}
var answers = await _answerService.GetEntitiesByPrincipalId(question.Id).ToListAsync();
answers.ForEach(a => a.IsCorrect = false);
answers.Shuffle();
question.Answers = answers;
testQuestions.Add(question);
}
TestModel test = new (){ Student = student, Topic = topic, Questions = testQuestions };
return(test);
}
public async Task <ActionResult <IEnumerable <SubjectDto> > > GetByLecturerId(string id)
{
return(await _subjectService.GetEntitiesByPrincipalId(id).ToListAsync());
}
public async Task <ActionResult <IEnumerable <QuestionResultDto> > > GetByQuestionId(string id)
{
return(await _questionResultService.GetEntitiesByPrincipalId(id).ToListAsync());
}
public async Task <ActionResult <IEnumerable <AttemptDto> > > GetByStudentId(string id)
{
return(await _attemptService.GetEntitiesByPrincipalId(id).ToListAsync());
}
public async Task <ActionResult <IEnumerable <TopicDto> > > GetBySubjectId(string id)
{
return(await _topicService.GetEntitiesByPrincipalId(id).ToListAsync());
}
