public void delete(Course course) {
courseVerifier.verifyCourseOnDelete(course);
commonDao.deleteAllMeetingHoursForCourse(course.getId());
courseDao.delete(course.getId());
}
public Course create(Course course, Instructor instructor) {
courseVerifier.verifyCourseOnCreate(course, instructor);
Long locationId = commonDao.provideCourseLocation(course.getLocation());
Course newlyCreatedCourse = courseDao.create(course, instructor.getId(), locationId);
createMeetingHours(course);
return courseDao.getById(newlyCreatedCourse.getId());
}
private void createMeetingHours(Course course) {
for (EventInformation eventInformation : course.getMeetingHours()) {
Long eventInformationId = commonDao.getEventInformationId(eventInformation);
if (eventInformationId == null) {
commonDao.createEventInformation(eventInformation);
eventInformationId = commonDao.getEventInformationId(eventInformation);
}
commonDao.createMeetingHours(course.getId(), eventInformationId);
}
}
public Course update(Course course) {
courseVerifier.verifyCourseOnUpdate(course);
commonDao.deleteAllMeetingHoursForCourse(course.getId());
Long locationId = commonDao.provideCourseLocation(course.getLocation());
courseDao.update(course, locationId);
createMeetingHours(course);
return courseDao.getById(course.getId());
}
public List<Student> getStudentsByCourse(Course course) {
courseVerifier.verifyCourseExists(course);
List<Student> students = studentDao.getStudentsByCourse(course.getId());
if (students.size() == 0) {
logger.info("No students enrolled in this course were found");
}
return students;
}
public Instructor getInstructorByCourse(Course course) {
courseVerifier.verifyCourseExists(course);
Instructor instructor = instructorDao.getInstructorByCourse(course.getId());
if (instructor == null) {
logger.error("The course doesn't have an instructor. This shouldn't have happened");
throw new GeneralException(
"The course doesn't have an instructor. This shouldn't have happened");
}
return instructor;
}
public void updateInstructor(Course course, Instructor instructor) {
courseVerifier.verifyUpdateInstructor(course, instructor);
courseDao.updateInstructor(course.getId(), instructor.getId());
}
public void unEnrollStudent(Course course, Student student) {
courseVerifier.verifyUnenrollStudent(course, student);
courseDao.unenrollStudent(course.getId(), student.getId());
}