public JsonResult Add(CourseOfferingViewModel viewModel)
{
// Populate VM
viewModel = PopulateViewModel(viewModel);
// Validate model state
if (!ModelState.IsValid)
return Json(new { error = true, message = "There were errors in the submission"});
// Attempt to add the offering
try
{
var offering = new CourseOffering()
{
Course_CourseID = viewModel.SelectedCourseId,
Semester = viewModel.Semester.ToString(),
Year = viewModel.SelectedYear
};
_courseService.AddCourseOffering(offering);
}
catch (CourseOfferingExistsException)
{
// If the offering already exists, display error
return Json(new { error = true, message = "Course offering already exists" });
}
return Json(new { error = false, message = "Course offering successfully created!" });
}
public void AddStudent(Student student, CourseOffering offering)
{
// Check if the student already exists in the offering
if (_studentRepository.StudentExists(offering, student.StudentNum))
throw new StudentExistsException();
// Insert the student into the offering
_courseOfferingRepository.InsertStudentIntoCourseOffering(student, offering);
}
public bool CourseOfferingExists(CourseOffering offering)
{
var match = _dbContext.CourseOfferings.Any(
o =>
o.Course_CourseID == offering.Course_CourseID &&
o.Year == offering.Year &&
o.Semester == offering.Semester);
return match;
}
public void AddCourseOffering(CourseOffering offering)
{
// If a course offering already exists, throw custom exception
if (_courseOfferingRepository.CourseOfferingExists(offering))
throw new CourseOfferingExistsException();
// Insert the course offering
_courseOfferingRepository.InsertCourseOffering(offering);
_courseOfferingRepository.Save();
}
public void InsertStudentIntoCourseOffering(Student student, CourseOffering courseOffering)
{
// Get the current student from the offering
var currentStudent = _dbContext.Students.FirstOrDefault(s => s.StudentNum == student.StudentNum);
// Add / Register student
courseOffering.Students.Add(currentStudent ?? student);
// Persist to the DB
Save();
}
public List<Student> GetStudents(CourseOffering offering) => _studentRepository.GetStudents(offering);
public bool StudentExists(CourseOffering offering, string number)
{
return offering.Students.FirstOrDefault(s => s.StudentNum == number) != null;
}
public List<Student> GetStudents(CourseOffering offering)
{
return offering.Students.ToList();
}
public int CompareTo(CourseOffering other) => other == null ? 1 : Year.CompareTo(other.Year);
public void InsertCourseOffering(CourseOffering courseOffering)
{
_dbContext.CourseOfferings.Add(courseOffering);
}