public async Task <ActionResult> Draft([FromBody] ExamSubmission submission)
{
if (submission == null || submission.ExamAnswers == null ||
submission.ExamAnswers.Count == 0 || string.IsNullOrWhiteSpace(submission.ExamVersion))
{
return(BadRequest());
}
if (!IsValidVersion(submission.ExamVersion))
{
return(NotFound());
}
var drafts = await UserSubmissionsAsync();
var draft = drafts.Value.SingleOrDefault(s => s.Version == submission.ExamVersion);
if (draft == null)
{
draft = new AuditExamSubmission
{
IsSubmitted = false,
UserID = drafts.Key.Id,
Version = submission.ExamVersion,
};
db_.AuditExamSubmissions.Add(draft);
}
draft.RawSubmission = JsonConvert.SerializeObject(submission);
draft.SubmitTime = DateTime.Now;
await db_.SaveChangesAsync();
return(Ok());
}
e.Course.TrainerId == userId); // course trainer
public async Task <bool> CreateAsync(int courseId, string userId, string fileName, string fileUrl)
{
var studentCourseFound = await this.db
.Courses
.Where(c => c.Id == courseId)
.Where(c => c.Students.Any(sc => sc.StudentId == userId))
.AnyAsync();
if (!studentCourseFound ||
string.IsNullOrWhiteSpace(fileName) ||
string.IsNullOrWhiteSpace(fileUrl))
{
return(false);
}
var examSubmission = new ExamSubmission
{
CourseId = courseId,
StudentId = userId,
FileName = fileName,
FileUrl = fileUrl,
SubmissionDate = DateTime.UtcNow
};
await this.db.ExamSubmissions.AddAsync(examSubmission);
var result = await this.db.SaveChangesAsync();
var success = result > 0;
return(success);
}
public async Task <ActionResult> Draft(string version)
{
if (!IsValidVersion(version))
{
return(NotFound());
}
var draft = await db_.AuditExamSubmissions.SingleOrDefaultAsync(u => u.User.UserName == User.Identity.Name && u.Version == version && !u.IsSubmitted);
ExamSubmission submission = null;
if (draft != null)
{
submission = JsonConvert.DeserializeObject <ExamSubmission>(draft.RawSubmission);
}
return(Json(submission));
}
private async Task <UniversityDbContext> PrepareUserExams()
{
var user = new User {
Id = UserIdValid
};
var userOther = new User {
Id = "AnotherUser"
};
var course1 = new Course {
Id = CourseIdSecond, Name = CourseNameSecond
};
var course2 = new Course {
Id = CourseIdFirst, Name = CourseNameFirst
};
var exam1 = new ExamSubmission {
Id = 1, CourseId = CourseIdSecond, SubmissionDate = DateFirst, StudentId = UserIdValid
};
var exam2 = new ExamSubmission {
Id = 2, CourseId = CourseIdSecond, SubmissionDate = DateSecond, StudentId = UserIdValid
};
var exam3 = new ExamSubmission {
Id = 3, CourseId = CourseIdFirst, SubmissionDate = DateThird, StudentId = UserIdValid
};
var examOther = new ExamSubmission {
Id = 4, CourseId = CourseIdSecond, SubmissionDate = DateThird, StudentId = UserIdInvalid
};
var db = Tests.InitializeDatabase();
await db.Courses.AddRangeAsync(course1, course2);
await db.ExamSubmissions.AddRangeAsync(exam1, exam2, exam3, examOther);
await db.Users.AddRangeAsync(user, userOther);
await db.SaveChangesAsync();
return(db);
}
public async Task <ActionResult> Submit([FromBody] ExamSubmission submission)
{
if (submission == null || submission.ExamAnswers == null || submission.ExamAnswers.Count == 0)
{
return(BadRequest());
}
if (!IsValidVersion(submission.ExamVersion))
{
return(NotFound());
}
var submissions = await UserSubmissionsAsync();
var submit = submissions.Value.SingleOrDefault(s => s.Version == submission.ExamVersion);
if (submit == null)
{
submit = new AuditExamSubmission
{
UserID = submissions.Key.Id,
Version = submission.ExamVersion,
};
}
else if (submit.IsSubmitted)
{
return(BadRequest());
}
submit.IsSubmitted = true;
submit.RawSubmission = JsonConvert.SerializeObject(submission);
ExamResult result = GetResult(submission);
submit.SubmitTime = result.SubmitTime;
submit.HasPassed = result.HasPassed;
submit.Score = result.Score;
submit.RawResult = JsonConvert.SerializeObject(result);
await db_.SaveChangesAsync();
return(Json(result));
}
private ExamResult GetResult(ExamSubmission submission)
{
var submissionDict = submission.ExamAnswers.ToDictionary(e => e.QuestionId);
var exam = config_.Exams.FirstOrDefault(e => e.Version == submission.ExamVersion);
var examResult = exam.Answers.Aggregate(new ExamResult
{
ExamAnswers = new List <ExamResult.ExamAnswer>(),
ExamVersion = exam.Version,
Score = 0,
SubmitTime = DateTime.Now,
IsSubmitted = true,
}, (results, actual) =>
{
var result = new ExamResult.ExamAnswer
{
Point = 0,
QuestionId = actual.Id,
Comment = actual.Comment,
Correct = false,
};
if (submissionDict.ContainsKey(actual.Id))
{
var submittedAnswer = submissionDict[actual.Id];
result.Answer = submittedAnswer.Answer;
result.Correct = AnswerEquals(submittedAnswer.Answer, actual.Answer);
result.Point = result.Correct ? actual.Point : 0;
}
results.ExamAnswers.Add(result);
results.Score += result.Point;
return(results);
});
examResult.HasPassed = exam.PassScore <= examResult.ExamAnswers.Sum(e => e.Point);
return(examResult);
}
private async Task <UniversityDbContext> PrepareStudentInCourseExamSubmissions()
{
var pastDate = DateTime.UtcNow.AddDays(-2);
var futureDate = DateTime.UtcNow.AddDays(1);
var student = new User {
Id = StudentEnrolled
};
var trainer = new User {
Id = TrainerValid
};
var coursePast = new Course {
Id = CourseValid, TrainerId = TrainerValid, EndDate = pastDate
};
coursePast.Students.Add(new StudentCourse {
StudentId = StudentEnrolled, GradeBg = PreviousGradeBg
});
var courseCurrent = new Course {
Id = CourseCurrent, TrainerId = TrainerValid, EndDate = futureDate
};
courseCurrent.Students.Add(new StudentCourse {
StudentId = StudentEnrolled
});
var exam1 = new ExamSubmission
{
Id = ExamValid,
CourseId = CourseValid,
StudentId = StudentEnrolled,
SubmissionDate = new DateTime(2019, 7, 10, 14, 15, 00), // latest
FileUrl = FileUrl
};
var exam2 = new ExamSubmission
{
Id = 2,
CourseId = CourseValid,
StudentId = StudentEnrolled,
SubmissionDate = new DateTime(2019, 7, 1, 14, 18, 00),
FileUrl = $"{FileUrl}-2"
};
var exam3 = new ExamSubmission
{
Id = 3,
CourseId = CourseCurrent,
StudentId = StudentEnrolled,
SubmissionDate = new DateTime(2019, 7, 1, 14, 20, 50),
FileUrl = $"{FileUrl}-3"
};
var db = Tests.InitializeDatabase();
await db.Users.AddRangeAsync(student, trainer);
await db.Courses.AddRangeAsync(coursePast, courseCurrent);
await db.ExamSubmissions.AddRangeAsync(new List <ExamSubmission> {
exam1, exam2, exam3
});
await db.SaveChangesAsync();
return(db);
}
