/// <summary>
/// Related specific course with specific study program, and semester.
/// </summary>
/// <param name="courseId">Unique identifer for the course</param>
/// <param name="studyProgram">Study program that needs to be related with specified course</param>
/// <param name="semester">Semester that needs to be related with specified course</param>
/// <returns>True if added, false if not</returns>
public async Task <ResultMessage <bool> > AddInStudyProgram(int courseId, StudyProgram studyProgram, Semester semester)
{
try
{
CourseStudyProgram courseStudyProgram = new CourseStudyProgram()
{
CourseId = courseId,
Semester = semester,
StudyProgram = studyProgram,
StudyYear = semester.GetStudyYear()
};
await _orhedgeContext.AddAsync(courseStudyProgram);
await _orhedgeContext.SaveChangesAsync();
return(new ResultMessage <bool>(true, OperationStatus.Success));
}
catch (DbUpdateException ex)
{
return(new ResultMessage <bool>(false, _errorHandler.Handle(ex)));
}
catch (Exception ex)
{
return(new ResultMessage <bool>(false, _errorHandler.Handle(ex)));
}
}
/// <summary>
/// Deletes course from study program and within certain semester.
/// </summary>
/// <param name="courseId">Unique identifer for the course</param>
/// <param name="studyProgram">Study program from which course is being deleted</param>
/// <param name="semester">Semester from which course if being deleted</param>
/// <returns>True if deleted, false if not</returns>
public async Task <ResultMessage <bool> > DeleteFromStudyProgram(int courseId, StudyProgram studyProgram, Semester semester)
{
try
{
CourseStudyProgram courseStudyProgram = await _orhedgeContext.CourseStudyPrograms
.SingleOrDefaultAsync(x => x.CourseId == courseId &&
x.StudyProgram == studyProgram &&
x.Semester == semester);
if (courseStudyProgram == null)
{
return(new ResultMessage <bool>(false, OperationStatus.NotFound));
}
_orhedgeContext.Remove(courseStudyProgram);
await _orhedgeContext.SaveChangesAsync();
return(new ResultMessage <bool>(true, OperationStatus.Success));
}
catch (DbUpdateException ex)
{
return(new ResultMessage <bool>(false, _errorHandler.Handle(ex)));
}
catch (Exception ex)
{
return(new ResultMessage <bool>(false, _errorHandler.Handle(ex)));
}
}
