public IActionResult Add(int id, LinkerViewModel model)
{
if (!ModelState.IsValid)
{
return(StatusCode(412));
}
try {
var course = _courseService.GetCourseById(id);
if (course == null)
{
return(NotFound());
}
var student = _studentService.AddStudentToCourse(id, model);
if (student == null)
{
return(StatusCode(409));
}
return(Created(Url.Link("GetStudentsOfCourse", new { id }), student));
} catch (Exception e) {
return(StatusCode(500, e));
}
}
public StudentDTO AddStudentToCourseWaitingList(int id, LinkerViewModel model)
{
var student = GetStudentBySSN(model.SSN);
if (student == null)
{
throw new CustomObjectNotFoundException("Student not found!\n");
}
ValidateWLLink(id, model.SSN);
var csLink = GetCourseStudentLink(id, model.SSN);
if (csLink != null && csLink.IsActive)
{
throw new CustomForbiddenException($"{student.Name} is already enrolled as a student\n");
}
_db.WaitingListLinkers.Add(new WaitingListLinker {
SSN = model.SSN,
Id = id
});
_db.SaveChanges();
return(new StudentDTO {
Name = student.Name
});
}
public IActionResult WaitingListAdd(int id, [FromBody] LinkerViewModel model)
{
if (!ModelState.IsValid)
{
var errors = ModelState.Select(x => x.Value.Errors)
.Where(y => y.Count > 0)
.ToList();
return(StatusCode(412, errors));
}
try {
var course = _courseService.GetCourseById(id);
var student = _studentService.AddStudentToCourseWaitingList(id, model);
return(Ok($"{student.Name} is now registered on the waiting list\n"));
// return Created(Url.Link("GetCourseWaitingList", new { id }), student);
} catch (CustomObjectNotFoundException e) {
return(NotFound(e.Message));
} catch (CustomConflictException e) {
//return StatusCode(409, e.Message);
return(StatusCode(412, e.Message));
} catch (CustomForbiddenException e) {
return(StatusCode(412, e.Message));
//return StatusCode(403, e.Message);
} catch (Exception e) {
return(StatusCode(500, e.Message));
}
}
public StudentDTO AddStudentToCourse(int id, LinkerViewModel model, int capacity)
{
var student = GetStudentBySSN(model.SSN);
if (student == null)
{
throw new CustomObjectNotFoundException("Student not found!\n");
}
if (GetStudentsEntitiesOfCourse(id).Count >= capacity)
{
throw new CustomForbiddenException("Max students reached\n");
}
var csLink = GetCourseStudentLink(id, model.SSN);
if (csLink != null)
{
if (csLink.IsActive)
{
throw new CustomConflictException($"{student.Name} is already enrolled as a student\n");
}
csLink.IsActive = true;
}
else
{
_db.CourseStudentLinkers.Add(new CourseStudentLinker {
SSN = model.SSN,
Id = id
});
}
_db.SaveChanges();
// remove from waiting list
var wlLink = GetWaitingListLink(id, model.SSN);
if (wlLink != null)
{
_db.WaitingListLinkers.Remove(wlLink);
_db.SaveChanges();
}
return(new StudentDTO {
Name = student.Name
});
}
public List <StudentDTO> AddStudentToCourse(int id, LinkerViewModel model)
{
var link = (from l in _db.CourseStudentLinkers
where l.Id == id &&
l.SSN == model.SSN
select l).SingleOrDefault();
if (link != null)
{
return(null);
}
_db.CourseStudentLinkers.Add(new CourseStudentLinker {
SSN = model.SSN,
Id = id
});
_db.SaveChanges();
return(GetStudentsOfCourse(id));
}
