src/main/java/net/pterodactylus/sone/notify/ListNotificationFilter.java

   1 /*
   2  * Sone - ListNotificationFilter.java - Copyright © 2010–2020 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.notify;
  19
  20 import static com.google.common.collect.FluentIterable.from;
  21 import static java.util.stream.Collectors.toList;
  22
  23 import java.util.ArrayList;
  24 import java.util.Collection;
  25 import java.util.List;
  26 import javax.annotation.Nonnull;
  27 import javax.annotation.Nullable;
  28 import javax.inject.Inject;
  29 import javax.inject.Singleton;
  30
  31 import net.pterodactylus.sone.data.Post;
  32 import net.pterodactylus.sone.data.PostReply;
  33 import net.pterodactylus.sone.data.Sone;
  34 import net.pterodactylus.util.notify.Notification;
  35
  36 import com.google.common.base.Optional;
  37
  38 /**
  39  * Filter for {@link ListNotification}s.
  40  */
  41 @Singleton
  42 public class ListNotificationFilter {
  43
  44         private final PostVisibilityFilter postVisibilityFilter;
  45         private final ReplyVisibilityFilter replyVisibilityFilter;
  46
  47         @Inject
  48         public ListNotificationFilter(@Nonnull PostVisibilityFilter postVisibilityFilter, @Nonnull ReplyVisibilityFilter replyVisibilityFilter) {
  49                 this.postVisibilityFilter = postVisibilityFilter;
  50                 this.replyVisibilityFilter = replyVisibilityFilter;
  51         }
  52
  53         /**
  54          * Filters new-post and new-reply notifications in the given list of
  55          * notifications. If {@code currentSone} is <code>null</code>, new-post and
  56          * new-reply notifications are removed completely. If {@code currentSone} is
  57          * not {@code null}, only posts that are posted by a friend Sone or the Sone
  58          * itself, and replies that are replies to posts of friend Sones or the Sone
  59          * itself will be retained in the notifications.
  60          *
  61          * @param notifications
  62          *              The notifications to filter
  63          * @param currentSone
  64          *              The current Sone, or {@code null} if not logged in
  65          * @return The filtered notifications
  66          */
  67         @SuppressWarnings("unchecked")
  68         public List<Notification> filterNotifications(Collection<? extends Notification> notifications, Sone currentSone) {
  69                 List<Notification> filteredNotifications = new ArrayList<>();
  70                 for (Notification notification : notifications) {
  71                         if (notification.getId().equals("new-sone-notification")) {
  72                                 if ((currentSone != null) && !currentSone.getOptions().isShowNewSoneNotifications()) {
  73                                         continue;
  74                                 }
  75                                 filteredNotifications.add(notification);
  76                         } else if (notification.getId().equals("new-post-notification")) {
  77                                 if (currentSone == null) {
  78                                         continue;
  79                                 }
  80                                 if (!currentSone.getOptions().isShowNewPostNotifications()) {
  81                                         continue;
  82                                 }
  83                                 Optional<ListNotification<Post>> filteredNotification = filterPostNotification((ListNotification<Post>) notification, currentSone);
  84                                 if (filteredNotification.isPresent()) {
  85                                         filteredNotifications.add(filteredNotification.get());
  86                                 }
  87                         } else if (notification.getId().equals("new-reply-notification")) {
  88                                 if (currentSone == null) {
  89                                         continue;
  90                                 }
  91                                 if (!currentSone.getOptions().isShowNewReplyNotifications()) {
  92                                         continue;
  93                                 }
  94                                 Optional<ListNotification<PostReply>> filteredNotification =
  95                                                 filterNewReplyNotification((ListNotification<PostReply>) notification, currentSone);
  96                                 if (filteredNotification.isPresent()) {
  97                                         filteredNotifications.add(filteredNotification.get());
  98                                 }
  99                         } else if (notification.getId().equals("mention-notification")) {
 100                                 Optional<ListNotification<Post>> filteredNotification = filterPostNotification((ListNotification<Post>) notification, null);
 101                                 if (filteredNotification.isPresent()) {
 102                                         filteredNotifications.add(filteredNotification.get());
 103                                 }
 104                         } else {
 105                                 filteredNotifications.add(notification);
 106                         }
 107                 }
 108                 return filteredNotifications;
 109         }
 110
 111         /**
 112          * Filters the posts of the given notification.
 113          *
 114          * @param postNotification
 115          *              The post notification
 116          * @param currentSone
 117          *              The current Sone, or {@code null} if not logged in
 118          * @return The filtered post notification, or {@link Optional#absent()} if the notification should be removed
 119          */
 120         @Nonnull
 121         private Optional<ListNotification<Post>> filterPostNotification(@Nonnull ListNotification<Post> postNotification,
 122                         @Nullable Sone currentSone) {
 123                 List<Post> newPosts = postNotification.getElements().stream().filter(postVisibilityFilter.isVisible(currentSone)).collect(toList());
 124                 if (newPosts.isEmpty()) {
 125                         return Optional.absent();
 126                 }
 127                 if (newPosts.size() == postNotification.getElements().size()) {
 128                         return Optional.of(postNotification);
 129                 }
 130                 ListNotification<Post> filteredNotification = new ListNotification<>(postNotification);
 131                 filteredNotification.setElements(newPosts);
 132                 filteredNotification.setLastUpdateTime(postNotification.getLastUpdatedTime());
 133                 return Optional.of(filteredNotification);
 134         }
 135
 136         /**
 137          * Filters the new replies of the given notification. If {@code currentSone}
 138          * is {@code null}, {@code null} is returned and the notification is
 139          * subsequently removed. Otherwise only replies that are replies to posts
 140          * that are posted by friend Sones of the given Sone are retained; all other
 141          * replies are removed.
 142          *
 143          * @param newReplyNotification
 144          *              The new-reply notification
 145          * @param currentSone
 146          *              The current Sone, or {@code null} if not logged in
 147          * @return The filtered new-reply notification, or {@code null} if the
 148          * notification should be removed
 149          */
 150         private Optional<ListNotification<PostReply>> filterNewReplyNotification(ListNotification<PostReply> newReplyNotification,
 151                         @Nonnull Sone currentSone) {
 152                 List<PostReply> newReplies = from(newReplyNotification.getElements()).filter(replyVisibilityFilter.isVisible(currentSone)).toList();
 153                 if (newReplies.isEmpty()) {
 154                         return Optional.absent();
 155                 }
 156                 if (newReplies.size() == newReplyNotification.getElements().size()) {
 157                         return Optional.of(newReplyNotification);
 158                 }
 159                 ListNotification<PostReply> filteredNotification = new ListNotification<>(newReplyNotification);
 160                 filteredNotification.setElements(newReplies);
 161                 filteredNotification.setLastUpdateTime(newReplyNotification.getLastUpdatedTime());
 162                 return Optional.of(filteredNotification);
 163         }
 164
 165 }