();
+ 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:
+ *
+ * - The post does not have a Sone.
+ * - The postâs {@link Post#getTime() time} is in the future.
+ *
+ *
+ * If {@code post} is not {@code null} more checks are performed, and the
+ * post will be invisible if:
+ *
+ *
+ * - The Sone of the post is not the given Sone, the given Sone does not
+ * follow the postâs Sone, and the given Sone is not the recipient of the
+ * post.
+ * - The trust relationship between the two Sones can not be retrieved.
+ * - The given Sone has explicitely assigned negative trust to the postâs
+ * Sone.
+ * - The given Sone has not explicitely assigned negative trust to the
+ * postâs Sone but the implicit trust is negative.
+ *
+ * If none of these statements is true the post is considered visible.
+ *
+ * @param sone
+ * The Sone that checks for a postâs 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");
+ Sone postSone = post.getSone();
+ if (postSone == null) {
+ return false;
+ }
+ 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;
}
- return (ListNotification) notification;
}
- return null;
+ 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:
+ *
+ * - The reply does not have a post.
+ * - The replyâs post does not have a Sone.
+ * - The Sone of the replyâs post is not the given Sone, the given Sone
+ * does not follow the replyâs postâs Sone, and the given Sone is not the
+ * recipient of the replyâs post.
+ * - The trust relationship between the two Sones can not be retrieved.
+ * - The given Sone has explicitely assigned negative trust to the postâs
+ * Sone.
+ * - The given Sone has not explicitely assigned negative trust to the
+ * replyâs postâs Sone but the implicit trust is negative.
+ * - The replyâs postâs {@link Post#getTime() time} is in the future.
+ * - The replyâs {@link Reply#getTime() time} is in the future.
+ *
+ * If none of these statements is true the reply is considered visible.
+ *
+ * @param sone
+ * The Sone that checks for a postâs 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 = reply.getPost();
+ if (!post.isPresent()) {
+ return false;
+ }
+ if (!isPostVisible(sone, post.get())) {
+ return false;
+ }
+ if (reply.getTime() > System.currentTimeMillis()) {
+ return false;
+ }
+ return true;
}
}