public JsonResult Add(CourseViewModel input)
{
// Validate model state
if (!ModelState.IsValid)
return Json(new { error = true, message = "There were errors in the submission" });
// Attempt to add the course
try
{
// Build the course object
var course = new Course()
{
CourseID = input.Number,
CourseTitle = input.Name,
HoursPerWeek = input.WeeklyHours
};
// Add the course
_courseService.AddCourse(course);
}
catch (CourseExistsException)
{
// If the course already exists, display error
return Json(new { error = true, message = "Course already exists" });
}
return Json(new { error = false, message = "Course successfully created!" });
}
public void AddCourse(Course course)
{
// If a course offering already exists, throw custom exception
if (_courseRepository.CourseExists(course))
throw new CourseExistsException();
_courseRepository.InsertCourse(course);
_courseRepository.Save();
}
public void InsertCourse(Course course)
{
_dbContext.Courses.Add(course);
}
public bool CourseExists(Course course)
{
return _dbContext.Courses.Any(c => c.CourseID == course.CourseID);
}