Package com.ericbouchut.learndev.course

Class CourseService

java.lang.Object

com.ericbouchut.learndev.course.CourseService

@Service
@Transactional(readOnly=true)
public class CourseService
extends Object

Read side of the course catalogue, applying the student visibility rule: a student sees PUBLISHED courses; a student who is enrolled keeps read access to the course and its published lessons if the course is later ARCHIVED (content continuity); DRAFT content is never visible to students. Invisible content surfaces as 404, not 403, so the URL space does not leak which drafts exist.

Constructor Summary

Constructors

Constructor	Description
CourseService(CourseRepository courses, LessonRepository lessons, EnrollmentRepository enrollments)

Method Summary

Modifier and Type	Method	Description
List<Course>	catalogue()	The public catalogue: published courses only.
Lesson	publishedLesson(Course course, Long lessonId)	One published lesson of the given course, or 404 when the lesson does not exist, is not published, or belongs to another course.
List<Lesson>	publishedLessons(Course course)	The lessons of a course a student may read, in reading order.
Course	visibleCourse(Long courseId, User student)	The course as visible to the given student, or 404 when the course does not exist or the visibility rule (see class Javadoc) hides it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CourseService

public CourseService(CourseRepository courses,
 LessonRepository lessons,
 EnrollmentRepository enrollments)

Method Details

catalogue

public List<Course> catalogue()

The public catalogue: published courses only.

visibleCourse

public Course visibleCourse(Long courseId,
 User student)

The course as visible to the given student, or 404 when the course does not exist or the visibility rule (see class Javadoc) hides it.

publishedLessons

public List<Lesson> publishedLessons(Course course)

The lessons of a course a student may read, in reading order.

publishedLesson

public Lesson publishedLesson(Course course,
 Long lessonId)

One published lesson of the given course, or 404 when the lesson does not exist, is not published, or belongs to another course.