// Delete a course and all of its course controls.
public static void DeleteCourse(EventDB eventDB, Id<Course> courseId)
{
// Remember the set of course controls.
List<Id<CourseControl>> courseControls = new List<Id<CourseControl>>(QueryEvent.EnumCourseControlIds(eventDB, new CourseDesignator(courseId)));
// Remove the course.
eventDB.RemoveCourse(courseId);
// Remove each of the course controls in that course
foreach (Id<CourseControl> courseControlId in courseControls) {
eventDB.RemoveCourseControl(courseControlId);
}
// Now check specials, and see which need to be modified
List<Id<Special>> specialsToChange = new List<Id<Special>>();
foreach (Id<Special> specialId in eventDB.AllSpecialIds) {
Special special = eventDB.GetSpecial(specialId);
if (!special.allCourses && special.courses.Any(cd => cd.CourseId == courseId)) {
// This special is not an all controls special, and is present on the course being deleted. Update it.
specialsToChange.Add(specialId);
}
}
// Update each of the specials.
foreach (Id<Special> specialId in specialsToChange) {
Special special = eventDB.GetSpecial(specialId);
CourseDesignator[] newCourses = special.courses.Where(cd => cd.CourseId != courseId).ToArray();
if (newCourses.Length == 0)
ChangeEvent.DeleteSpecial(eventDB, specialId);
else {
special = (Special) special.Clone();
special.courses = newCourses;
eventDB.ReplaceSpecial(specialId, special);
}
}
}
