/// <summary>
/// Delete a teaching assignment
/// </summary>
/// <param name="teaching"></param>
/// <returns></returns>
public TeachingDto DeleteTeachingAssignment(TeachingDto teaching)
{
Teaching deletedTeaching = teachingsService.Value.DeleteTeaching(teaching);
db.TeachingAssignmentsRepository.Delete(deletedTeaching);
db.Save();
var dto = TeachingsConverter.TeachingToTeachingDto(deletedTeaching);
return(dto);
}
/// <summary>
/// Get teaching assignment
/// </summary>
/// <param name="courseId"></param>
/// <param name="teacherId"></param>
/// <returns></returns>
public TeachingDto GetTeaching(int courseId, int teacherId)
{
// I probably dont need these. Just return null if there's no teaching
Course course = db.CoursesRepository.GetByID(courseId);
// No null check here, because the teachers service takes care of that...!
TeacherUser teacher = teachersService.Value.GetTeacherById(teacherId);
// Probably teaching will get Course and TeacherUser, so failure will be there!
Teaching teaching = teachingsService.Value.GetTeaching(courseId, teacherId);
if (teaching == null)
{
return(null);
}
return(TeachingsConverter.TeachingToTeachingDto(teaching));
}
/// <summary>
/// This should be the default entry for teaching assignments
/// </summary>
/// <param name="teaching"></param>
/// <returns></returns>
public TeachingDto CreateTeachingAssignment(TeachingDto teaching)
{
Course course = GetCourseById(teaching.CourseId);
TeacherUser teacher = teachersService.Value.GetTeacherById(teaching.TeacherId);
// Without teacher & user
// 1) required must be withheld
// 2) if teacher or course id is not valid, there will be a foreign key violation
// 3) if there is already a teaching assignment, a unique constraint will fire
Teaching newTeaching = new Teaching()
{
Course = course,
Teacher = teacher
};
db.TeachingAssignmentsRepository.Insert(newTeaching);
db.Save();
return(TeachingsConverter.TeachingToTeachingDto(newTeaching));
}