BbCourseService.java

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package net.paulgray.bbrest.course;

import blackboard.persist.Id;
import blackboard.persist.PersistenceException;
import blackboard.persist.course.CourseDbLoader;
import blackboard.platform.security.Entitlement;
import blackboard.platform.security.SecurityUtil;
import net.paulgray.bbrest.BlackboardUtilities;
import net.paulgray.lmsrest.course.Course;
import net.paulgray.lmsrest.course.CourseService;
import net.paulgray.lmsrest.user.User;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.paulgray.bbrest.discussion.BbDiscussionBoard;
import net.paulgray.bbrest.discussion.BbDiscussionService;
import net.paulgray.lmsrest.discussion.DiscussionBoard;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContextHolder;

/**
 *
 * @author pfgray
 */
public class BbCourseService implements CourseService {

    @Autowired
    BbDiscussionService bbDiscussionService;
    
    @Override
    public Course getCourseForId(String id) {
        try {
            CourseDbLoader courseDbLoader = CourseDbLoader.Default.getInstance();
            return new BbCourse(courseDbLoader.loadById(BlackboardUtilities.getIdFromPk(id, blackboard.data.course.Course.class)));
        } catch (PersistenceException ex) {
            Logger.getLogger(BbCourseService.class.getName()).log(Level.SEVERE, null, ex);
            return null;
        }
    }

    @Override
    public List<Course> getCoursesForUser(User user, String courseFilter) {
        try {
            CourseDbLoader courseDbLoader = CourseDbLoader.Default.getInstance();
            List<blackboard.data.course.Course> courses = courseDbLoader.loadByUserId(BlackboardUtilities.getIdFromPk(user.getId(), blackboard.data.user.User.class));
            List<Course> toReturn = new LinkedList<Course>();
            for (blackboard.data.course.Course course : courses) {
                if (course.getId() != null && course.getCourseId().contains(courseFilter)) {
                    BbCourse bbCourse = new BbCourse(course, BlackboardUtilities.getIdFromPk(user.getId(), blackboard.data.user.User.class));
                    List<DiscussionBoard> dbs = bbDiscussionService.getDiscussionBoardsForCourseAndUser(bbCourse, user);
                    for (DiscussionBoard db : dbs) {
                        bbCourse.unread_discussion_count = bbCourse.unread_discussion_count + ((BbDiscussionBoard) db).getUnread_messages();
                    }
                    toReturn.add(bbCourse);
                }
            }
            return toReturn;
        } catch (PersistenceException ex) {
            Logger.getLogger(BbCourseService.class.getName()).log(Level.SEVERE, null, ex);
            return null;
        }
    }

    public static Boolean currentUserCanViewCourse(String courseId) {
        User user = (User) SecurityContextHolder.getContext().getAuthentication().getDetails();

        Id userPk = BlackboardUtilities.getIdFromPk(user.getId(), blackboard.data.user.User.class);
        Id coursePk = BlackboardUtilities.getIdFromPk(courseId, blackboard.data.course.Course.class);

        if (!SecurityUtil.userHasEntitlement(userPk, coursePk, new Entitlement("course.VIEW"))) {
            return false;
        } else {
            return true;
        }
    }
    /*
     public List<Course> getCoursesByCourseSearch(User user, String courseFilter, int page, int pageSize){
     try {
     CourseDbLoader courseDbLoader = CourseDbLoader.Default.getInstance();
     List<blackboard.data.course.Course> courses = courseDbLoader.loadByUserId(BlackboardUtilities.getIdFromPk(user.getId(), blackboard.data.user.User.class));
            
     CourseSearch cs = new CourseSearch(page, pageSize, null, null);
     cs.addSearchParameter(new CourseSearch.SearchParameter(CourseSearch.SearchKey.CourseId, courseFilter, SearchOperator.In));
     cs.addSearchParameter(new CourseSearch.SearchParameter(CourseSearch.SearchKey.CourseId, courseFilter, SearchOperator.In));
            
     List<Course> toReturn = new LinkedList<Course>();
     for(blackboard.data.course.Course course : courses){
     toReturn.add(new BbCourse(course, BlackboardUtilities.getIdFromPk(user.getId(), blackboard.data.user.User.class)));
     }
     return toReturn;
     } catch (PersistenceException ex) {
     Logger.getLogger(BbCourseService.class.getName()).log(Level.SEVERE, null, ex);
     return null;
     }
     }
     */
}