+ /**
+ * Returns whether the given post reply is known.
+ *
+ * @param postReply
+ * The post reply
+ * @return {@code true} if the given post reply is known, {@code false}
+ * otherwise
+ */
+ boolean isPostReplyKnown(PostReply postReply) {
+ lock.readLock().lock();
+ try {
+ return knownPostReplies.contains(postReply.getId());
+ } finally {
+ lock.readLock().unlock();
+ }
+ }
+
+ /**
+ * Sets whether the given post reply is known.
+ *
+ * @param postReply
+ * The post reply
+ * @param known
+ * {@code true} if the post reply is known, {@code false} otherwise
+ */
+ void setPostReplyKnown(PostReply postReply, boolean known) {
+ lock.writeLock().lock();
+ try {
+ if (known) {
+ knownPostReplies.add(postReply.getId());
+ } else {
+ knownPostReplies.remove(postReply.getId());
+ }
+ } finally {
+ lock.writeLock().unlock();
+ }
+ }
+
+ void moveUp(Album album) {
+ lock.writeLock().lock();
+ try {
+ List<String> albums = albumChildren.get(album.getParent().getId());
+ int currentIndex = albums.indexOf(album.getId());
+ if (currentIndex == 0) {
+ return;
+ }
+ albums.remove(album.getId());
+ albums.add(currentIndex - 1, album.getId());
+ } finally {
+ lock.writeLock().unlock();
+ }
+ }
+
+ void moveDown(Album album) {
+ lock.writeLock().lock();
+ try {
+ List<String> albums = albumChildren.get(album.getParent().getId());
+ int currentIndex = albums.indexOf(album.getId());
+ if (currentIndex == (albums.size() - 1)) {
+ return;
+ }
+ albums.remove(album.getId());
+ albums.add(currentIndex + 1, album.getId());
+ } finally {
+ lock.writeLock().unlock();
+ }
+ }
+
+ void moveUp(Image image) {
+ lock.writeLock().lock();
+ try {
+ List<String> images = albumImages.get(image.getAlbum().getId());
+ int currentIndex = images.indexOf(image.getId());
+ if (currentIndex == 0) {
+ return;
+ }
+ images.remove(image.getId());
+ images.add(currentIndex - 1, image.getId());
+ } finally {
+ lock.writeLock().unlock();
+ }
+ }
+
+ void moveDown(Image image) {
+ lock.writeLock().lock();
+ try {
+ List<String> images = albumChildren.get(image.getAlbum().getId());
+ int currentIndex = images.indexOf(image.getId());
+ if (currentIndex == (images.size() - 1)) {
+ return;
+ }
+ images.remove(image.getId());
+ images.add(currentIndex + 1, image.getId());
+ } finally {
+ lock.writeLock().unlock();
+ }
+ }
+