/// <summary>
/// Replaces the course with the given id's StartDate and EndDate with the given information
/// If course is not found exception is thrown.
/// </summary>
/// <param name="id">The ID of the course to update</param>
/// <param name="model">The course object to update with</param>
public CourseDTO UpdateCourse(int id, UpdateCourseViewModel model)
{
// Finds the course asked for
var course = _db.Courses.SingleOrDefault(x => x.ID == id);
if (course == null)
{
throw new AppObjectNotFoundException();
}
course.StartDate = model.StartDate;
course.EndDate = model.EndDate;
_db.SaveChanges();
// Check if there is a template available for the course
var templateId = _db.CourseTemplates.SingleOrDefault(x => x.TemplateID == course.TemplateID);
if (templateId == null)
{
throw new AppServerErrorException();
}
// Check how many students are enrolled in the class
var studentCount = (from cr in _db.CourseRegistrations
where course.ID == cr.ID
select cr.StudentID).ToList().Count();
// Construct a new CourseDTO to return to the client
var updatedCourse = new CourseDTO
{
ID = course.ID,
EndDate = course.EndDate,
StartDate = course.StartDate,
Name = templateId.Name,
Semester = course.Semester,
StudentCount = studentCount
};
return updatedCourse;
}
public IHttpActionResult UpdateCourse(int id, UpdateCourseViewModel model)
{
if (ModelState.IsValid)
{
try
{
var result = _service.UpdateCourse(id, model);
return Content(HttpStatusCode.Created, result);
}
catch (AppObjectNotFoundException)
{
//return 404
return NotFound();
}
catch (AppServerErrorException)
{
//return 500
return InternalServerError();
}
}
else
{
return StatusCode(HttpStatusCode.PreconditionFailed);
}
}
