/// <summary>
/// Closes an exam and gives the user a grade, points and notification.
/// </summary>
/// <param name="levelExamId">id of a levelexam</param>
/// <param name="userInfoId">id of an userinfo</param>
/// <returns>Points of an exam</returns>
public double ReturnExam(int levelExamId, int userInfoId)
{
if (HasAccessToExam(levelExamId, userInfoId))
{
var levelExamResult = new LevelExamResult();
levelExamResult.UserInfoId = userInfoId;
levelExamResult.LevelExamId = levelExamId;
var exam = GameSchoolEntities.LevelExams.Where(x => x.LevelExamId == levelExamId).Single();
var correctAnswer = exam.LevelExamQuestions.Where(
x =>
x.LevelExamAnswers.Where(y => y.UserInfoes.Where(z => z.UserInfoId == userInfoId).Count() > 0).Where
(t => t.Correct).Count() > 0);
levelExamResult.Grade = ((correctAnswer.Count() * 1.0) / exam.LevelExamQuestions.Count()) * 10;
GameSchoolEntities.LevelExamResults.AddObject(levelExamResult);
Save();
if (ExternalNotificationContainer != null)
{
ExternalNotificationContainer.CreateNotification(string.Format("Þú hefur fengið {0} fyrir prófið \"{1}\"", levelExamResult.Grade, exam.Name), string.Format("/Exam/Index/{0}", exam.Level.CourseId), userInfoId);
}
if (ExternalPointContainer != null)
{
const int totalPointsPerGradeUnit = 5;
int points = ExternalPointContainer.CalculatePointsByGrade(levelExamResult.Grade,
totalPointsPerGradeUnit);
if (points > 0)
{
ExternalPointContainer.AddPointsToLevel(userInfoId, exam.LevelId, points,
string.Format(
"Þú hefur fengið {0} stig fyrir prófið \"{1}\".",
points, exam.Name));
}
}
return levelExamResult.Grade;
}
return 0;
}
