1 package net.pterodactylus.sone.notify;
3 import static com.google.common.base.Preconditions.checkNotNull;
5 import javax.annotation.Nonnull;
6 import javax.annotation.Nullable;
7 import javax.inject.Inject;
8 import javax.inject.Singleton;
10 import net.pterodactylus.sone.data.Post;
11 import net.pterodactylus.sone.data.PostReply;
12 import net.pterodactylus.sone.data.Sone;
14 import com.google.common.base.Optional;
15 import com.google.common.base.Predicate;
18 * Filter that checks a {@link PostReply} for visibility.
20 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
23 public class ReplyVisibilityFilter {
25 private final PostVisibilityFilter postVisibilityFilter;
28 public ReplyVisibilityFilter(@Nonnull PostVisibilityFilter postVisibilityFilter) {
29 this.postVisibilityFilter = postVisibilityFilter;
33 * Checks whether a reply is visible to the given Sone. A reply is not
34 * considered visible if one of the following statements is true:
36 * <li>The reply does not have a post.</li>
37 * <li>The reply’s post {@link PostVisibilityFilter#isPostVisible(Sone, Post) is not visible}.</li>
38 * <li>The reply’s {@link PostReply#getTime() time} is in the future.</li>
40 * If none of these statements is true the reply is considered visible.
43 * The Sone that checks for a post’s visibility (may be
44 * {@code null} to skip Sone-specific checks, such as trust)
46 * The reply to check for visibility
47 * @return {@code true} if the reply is considered visible, {@code false}
50 boolean isReplyVisible(@Nullable Sone sone, @Nonnull PostReply reply) {
51 checkNotNull(reply, "reply must not be null");
52 Optional<Post> post = reply.getPost();
53 if (!post.isPresent()) {
56 if (!postVisibilityFilter.isPostVisible(sone, post.get())) {
59 return reply.getTime() <= System.currentTimeMillis();
63 public Predicate<PostReply> isVisible(@Nullable final Sone currentSone) {
64 return new Predicate<PostReply>() {
66 public boolean apply(@Nullable PostReply postReply) {
67 return (postReply != null) && isReplyVisible(currentSone, postReply);