- return filteredNotification;
- }
-
- /**
- * Filters the given posts, using {@link #isPostVisible(Sone, Post)} to
- * decide whether a post should be contained in the returned list. If
- * {@code currentSone} is not {@code null} it is used to filter out posts
- * that are from Sones that are not followed or not trusted by the given
- * Sone.
- *
- * @param posts
- * The posts to filter
- * @param currentSone
- * The current Sone (may be {@code null})
- * @return The filtered posts
- */
- public static List<Post> filterPosts(Collection<Post> posts, Sone currentSone) {
- List<Post> filteredPosts = new ArrayList<Post>();
- for (Post post : posts) {
- if (isPostVisible(currentSone, post)) {
- filteredPosts.add(post);
- }
- }
- return filteredPosts;
- }
-
- /**
- * Checks whether a post is visible to the given Sone. A post is not
- * considered visible if one of the following statements is true:
- * <ul>
- * <li>The post does not have a Sone.</li>
- * <li>The post’s {@link Post#getTime() time} is in the future.</li>
- * </ul>
- * <p>
- * If {@code post} is not {@code null} more checks are performed, and the
- * post will be invisible if:
- * </p>
- * <ul>
- * <li>The Sone of the post is not the given Sone, the given Sone does not
- * follow the post’s Sone, and the given Sone is not the recipient of the
- * post.</li>
- * <li>The trust relationship between the two Sones can not be retrieved.</li>
- * <li>The given Sone has explicitely assigned negative trust to the post’s
- * Sone.</li>
- * <li>The given Sone has not explicitely assigned negative trust to the
- * post’s Sone but the implicit trust is negative.</li>
- * </ul>
- * If none of these statements is true the post is considered visible.
- *
- * @param sone
- * The Sone that checks for a post’s visibility (may be
- * {@code null} to skip Sone-specific checks, such as trust)
- * @param post
- * The post to check for visibility
- * @return {@code true} if the post is considered visible, {@code false}
- * otherwise
- */
- public static boolean isPostVisible(Sone sone, Post post) {
- checkNotNull(post, "post must not be null");
- if (!post.isLoaded()) {
- return false;
- }
- Sone postSone = post.getSone();
- if (sone != null) {
- Trust trust = postSone.getIdentity().getTrust((OwnIdentity) sone.getIdentity());
- if (trust != null) {
- if ((trust.getExplicit() != null) && (trust.getExplicit() < 0)) {
- return false;
- }
- if ((trust.getExplicit() == null) && (trust.getImplicit() != null) && (trust.getImplicit() < 0)) {
- return false;
- }
- } else {
- /*
- * a null trust means that the trust updater has not yet
- * received a trust value for this relation. if we return false,
- * the post feed will stay empty until the trust updater has
- * received trust values. to prevent this we simply assume that
- * posts are visible if there is no trust.
- */
- }
- if ((!postSone.equals(sone)) && !sone.hasFriend(postSone.getId()) && !sone.getId().equals(post.getRecipientId().orNull())) {
- return false;
- }
- }
- if (post.getTime() > System.currentTimeMillis()) {
- return false;
- }
- return true;
- }
-
- /**
- * Checks whether a reply is visible to the given Sone. A reply is not
- * considered visible if one of the following statements is true:
- * <ul>
- * <li>The reply does not have a post.</li>
- * <li>The reply’s post does not have a Sone.</li>
- * <li>The Sone of the reply’s post is not the given Sone, the given Sone
- * does not follow the reply’s post’s Sone, and the given Sone is not the
- * recipient of the reply’s post.</li>
- * <li>The trust relationship between the two Sones can not be retrieved.</li>
- * <li>The given Sone has explicitely assigned negative trust to the post’s
- * Sone.</li>
- * <li>The given Sone has not explicitely assigned negative trust to the
- * reply’s post’s Sone but the implicit trust is negative.</li>
- * <li>The reply’s post’s {@link Post#getTime() time} is in the future.</li>
- * <li>The reply’s {@link Reply#getTime() time} is in the future.</li>
- * </ul>
- * If none of these statements is true the reply is considered visible.
- *
- * @param sone
- * The Sone that checks for a post’s visibility (may be
- * {@code null} to skip Sone-specific checks, such as trust)
- * @param reply
- * The reply to check for visibility
- * @return {@code true} if the reply is considered visible, {@code false}
- * otherwise
- */
- public static boolean isReplyVisible(Sone sone, PostReply reply) {
- checkNotNull(reply, "reply must not be null");
- Optional<Post> post = reply.getPost();
- if (!post.isPresent()) {
- return false;
- }
- if (!isPostVisible(sone, post.get())) {
- return false;
- }
- if (reply.getTime() > System.currentTimeMillis()) {
- return false;
- }
- return true;