@Override
  public Response createUser(User user) {

    // if username does not exist (need to figure out how to check if a user exists)
    if (!userHashMap.containsKey(user.getUsername())) {

      userHashMap.put(user.getUsername(), user);

      return Response.status(201)
          .link("/services/resources/user/" + user.getUsername(), "resource")
          .build();

    } else return Response.status(409).build();
  }
  public final void initialiseContent() {
    // TO DO:
    // (Re)-initialise data structures so that the Web service's state is
    // the same same as when the Web service was initially created.

    BasicConfigurator.configure();

    _idCounter = new AtomicLong(0);
    userHashMap.put("Bertmern", new User("Bertmern", "Brerce", "Werne"));
    userHashMap.put("Spodermern", new User("Spodermern", "Terby", "Mergwer"));

    // set up a test blog entry
    BlogEntry testBlogEntry = new BlogEntry("Here is item 0 in blogEntryMap");
    testBlogEntry.setId(_idCounter.getAndIncrement());
    testBlogEntry.setTimePosted(DateTime.now());
    User testBlogCreator = userHashMap.get("Spodermern");
    testBlogCreator.addBlogEntry(testBlogEntry);
    Comment testComment = new Comment("I'm a test comment", DateTime.now());
    testBlogEntry.addComment(testComment);
    blogEntryMap.put(0l, testBlogEntry);

    // to prove sets of blog entries, make another blog entry

    BlogEntry testBlogEntry2 = new BlogEntry("Here is item 1 - second item - pls werk");
    testBlogEntry2.setId(_idCounter.getAndIncrement());
    testBlogEntry2.setTimePosted(DateTime.now());
    User testBlogCreator2 = userHashMap.get("Bertmern");
    testBlogCreator2.addBlogEntry(testBlogEntry2);
    Comment testComment2 = new Comment("Plz comment moar", DateTime.now());
    testBlogEntry2.addComment(testComment2);
    blogEntryMap.put(1l, testBlogEntry2);

    // Set up loads of posts for Bertmern to check BlogSet

    BlogEntry blogEntry1 = new BlogEntry("1 post");
    BlogEntry blogEntry2 = new BlogEntry("2 post");
    BlogEntry blogEntry3 = new BlogEntry("3 post");
    BlogEntry blogEntry4 = new BlogEntry("blue post");

    createBlogEntry(blogEntry1, "Bertmern");
    createBlogEntry(blogEntry2, "Bertmern");
    createBlogEntry(blogEntry3, "Bertmern");
    createBlogEntry(blogEntry4, "Bertmern");
  }
  @Override
  public Response createBlogEntry(BlogEntry blogEntry, String username) {

    if (userHashMap.containsKey(username)) {
      User blogAuthor = userHashMap.get(username);
      // then user exists and request should succeed
      blogEntry.setId(_idCounter.getAndIncrement());
      blogEntry.setTimePosted(DateTime.now());
      blogAuthor.addBlogEntry(blogEntry);
      blogEntryMap.put(blogEntry.getId(), blogEntry);

      return Response.status(201)
          .link("/services/resources/blog/" + blogEntry.getId(), "resource")
          .build();

    } else {
      // user does not exist and request should fail
      return Response.status(412).build();
    }
  }