public StudentFinalGrade(StudentGrade lectureGrade, StudentGrade exerciseGrade, StudentGrade workshopGrade)
{
var rawFinalGrade = CalculateRawFinalGrade(lectureGrade, exerciseGrade, workshopGrade);
Value = RoundToNearestHalf(rawFinalGrade);
HasPassed = Value >= 3;
}
private static StudentGrade CalculateRawFinalGrade(StudentGrade lectureGrade, StudentGrade exerciseGrade, StudentGrade workshopGrade)
=> new StudentGrade(
LectureWeight * lectureGrade.Value
+ ExerciseWeight * exerciseGrade.Value
+ WorkshopWeight * workshopGrade.Value
);
private static double RoundToNearestHalf(StudentGrade rawFinalGrade) => Math.Round(rawFinalGrade.Value * 2, MidpointRounding.AwayFromZero) / 2;
