Fix logging of exception.
[Sone.git] / src / main / java / net / pterodactylus / sone / core / Core.java
index 1bea477..e3fdd19 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Sone - Core.java - Copyright © 2010 David Roden
+ * Sone - Core.java - Copyright © 2010–2012 David Roden
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,8 +24,8 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 import java.util.Map.Entry;
+import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.logging.Level;
@@ -38,11 +38,15 @@ import net.pterodactylus.sone.data.Album;
 import net.pterodactylus.sone.data.Client;
 import net.pterodactylus.sone.data.Image;
 import net.pterodactylus.sone.data.Post;
+import net.pterodactylus.sone.data.PostReply;
 import net.pterodactylus.sone.data.Profile;
+import net.pterodactylus.sone.data.Profile.Field;
 import net.pterodactylus.sone.data.Reply;
 import net.pterodactylus.sone.data.Sone;
+import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
+import net.pterodactylus.sone.data.Sone.SoneStatus;
 import net.pterodactylus.sone.data.TemporaryImage;
-import net.pterodactylus.sone.data.Profile.Field;
+import net.pterodactylus.sone.data.impl.PostImpl;
 import net.pterodactylus.sone.fcp.FcpInterface;
 import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
 import net.pterodactylus.sone.freenet.wot.Identity;
@@ -50,7 +54,6 @@ import net.pterodactylus.sone.freenet.wot.IdentityListener;
 import net.pterodactylus.sone.freenet.wot.IdentityManager;
 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
 import net.pterodactylus.sone.freenet.wot.Trust;
-import net.pterodactylus.sone.freenet.wot.WebOfTrustException;
 import net.pterodactylus.sone.main.SonePlugin;
 import net.pterodactylus.util.config.Configuration;
 import net.pterodactylus.util.config.ConfigurationException;
@@ -72,26 +75,6 @@ import freenet.keys.FreenetURI;
  */
 public class Core extends AbstractService implements IdentityListener, UpdateListener, SoneProvider, PostProvider, SoneInsertListener, ImageInsertListener {
 
-       /**
-        * Enumeration for the possible states of a {@link Sone}.
-        *
-        * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
-        */
-       public enum SoneStatus {
-
-               /** The Sone is unknown, i.e. not yet downloaded. */
-               unknown,
-
-               /** The Sone is idle, i.e. not being downloaded or inserted. */
-               idle,
-
-               /** The Sone is currently being inserted. */
-               inserting,
-
-               /** The Sone is currently being downloaded. */
-               downloading,
-       }
-
        /** The logger. */
        private static final Logger logger = Logging.getLogger(Core.class);
 
@@ -128,12 +111,14 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        /** The update checker. */
        private final UpdateChecker updateChecker;
 
+       /** The trust updater. */
+       private final WebOfTrustUpdater webOfTrustUpdater;
+
        /** The FCP interface. */
        private volatile FcpInterface fcpInterface;
 
-       /** The Sones’ statuses. */
-       /* synchronize access on itself. */
-       private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
+       /** The times Sones were followed. */
+       private final Map<Sone, Long> soneFollowingTimes = new HashMap<Sone, Long>();
 
        /** Locked local Sones. */
        /* synchronize on itself. */
@@ -149,56 +134,45 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
        /** All local Sones. */
        /* synchronize access on this on itself. */
-       private Map<String, Sone> localSones = new HashMap<String, Sone>();
+       private final Map<String, Sone> localSones = new HashMap<String, Sone>();
 
        /** All remote Sones. */
        /* synchronize access on this on itself. */
-       private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
-
-       /** All new Sones. */
-       private Set<String> newSones = new HashSet<String>();
+       private final Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 
        /** All known Sones. */
-       /* synchronize access on {@link #newSones}. */
-       private Set<String> knownSones = new HashSet<String>();
+       private final Set<String> knownSones = new HashSet<String>();
 
        /** All posts. */
-       private Map<String, Post> posts = new HashMap<String, Post>();
-
-       /** All new posts. */
-       private Set<String> newPosts = new HashSet<String>();
+       private final Map<String, Post> posts = new HashMap<String, Post>();
 
        /** All known posts. */
-       /* synchronize access on {@link #newPosts}. */
-       private Set<String> knownPosts = new HashSet<String>();
+       private final Set<String> knownPosts = new HashSet<String>();
 
        /** All replies. */
-       private Map<String, Reply> replies = new HashMap<String, Reply>();
-
-       /** All new replies. */
-       private Set<String> newReplies = new HashSet<String>();
+       private final Map<String, PostReply> replies = new HashMap<String, PostReply>();
 
        /** All known replies. */
-       private Set<String> knownReplies = new HashSet<String>();
+       private final Set<String> knownReplies = new HashSet<String>();
 
        /** All bookmarked posts. */
        /* synchronize access on itself. */
-       private Set<String> bookmarkedPosts = new HashSet<String>();
+       private final Set<String> bookmarkedPosts = new HashSet<String>();
 
        /** Trusted identities, sorted by own identities. */
-       private Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
+       private final Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
 
        /** All known albums. */
-       private Map<String, Album> albums = new HashMap<String, Album>();
+       private final Map<String, Album> albums = new HashMap<String, Album>();
 
        /** All known images. */
-       private Map<String, Image> images = new HashMap<String, Image>();
+       private final Map<String, Image> images = new HashMap<String, Image>();
 
        /** All temporary images. */
-       private Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
+       private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 
        /** Ticker for threads that mark own elements as known. */
-       private Ticker localElementTicker = new Ticker();
+       private final Ticker localElementTicker = new Ticker();
 
        /** The time the configuration was last touched. */
        private volatile long lastConfigurationUpdate;
@@ -212,8 +186,10 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The freenet interface
         * @param identityManager
         *            The identity manager
+        * @param webOfTrustUpdater
+        *            The WebOfTrust updater
         */
-       public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
+       public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater) {
                super("Sone Core");
                this.configuration = configuration;
                this.freenetInterface = freenetInterface;
@@ -221,6 +197,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                this.soneDownloader = new SoneDownloader(this, freenetInterface);
                this.imageInserter = new ImageInserter(this, freenetInterface);
                this.updateChecker = new UpdateChecker(freenetInterface);
+               this.webOfTrustUpdater = webOfTrustUpdater;
        }
 
        //
@@ -301,33 +278,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Returns the status of the given Sone.
-        *
-        * @param sone
-        *            The Sone to get the status for
-        * @return The status of the Sone
-        */
-       public SoneStatus getSoneStatus(Sone sone) {
-               synchronized (soneStatuses) {
-                       return soneStatuses.get(sone);
-               }
-       }
-
-       /**
-        * Sets the status of the given Sone.
-        *
-        * @param sone
-        *            The Sone to set the status of
-        * @param soneStatus
-        *            The status to set
-        */
-       public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
-               synchronized (soneStatuses) {
-                       soneStatuses.put(sone, soneStatus);
-               }
-       }
-
-       /**
         * Returns the Sone rescuer for the given local Sone.
         *
         * @param sone
@@ -483,7 +433,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        if ((sone == null) && create) {
                                sone = new Sone(id);
                                localSones.put(id, sone);
-                               setSoneStatus(sone, SoneStatus.unknown);
                        }
                        return sone;
                }
@@ -505,17 +454,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *
         * @param id
         *            The ID of the remote Sone to get
-        * @return The Sone with the given ID
-        */
-       public Sone getRemoteSone(String id) {
-               return getRemoteSone(id, true);
-       }
-
-       /**
-        * Returns the remote Sone with the given ID.
-        *
-        * @param id
-        *            The ID of the remote Sone to get
         * @param create
         *            {@code true} to always create a Sone, {@code false} to return
         *            {@code null} if no Sone with the given ID exists
@@ -524,10 +462,9 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        public Sone getRemoteSone(String id, boolean create) {
                synchronized (remoteSones) {
                        Sone sone = remoteSones.get(id);
-                       if ((sone == null) && create) {
+                       if ((sone == null) && create && (id != null) && (id.length() == 43)) {
                                sone = new Sone(id);
                                remoteSones.put(id, sone);
-                               setSoneStatus(sone, SoneStatus.unknown);
                        }
                        return sone;
                }
@@ -562,19 +499,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Returns whether the Sone with the given ID is a new Sone.
-        *
-        * @param soneId
-        *            The ID of the sone to check for
-        * @return {@code true} if the given Sone is new, false otherwise
-        */
-       public boolean isNewSone(String soneId) {
-               synchronized (newSones) {
-                       return !knownSones.contains(soneId) && newSones.contains(soneId);
-               }
-       }
-
-       /**
         * Returns whether the given Sone has been modified.
         *
         * @param sone
@@ -587,6 +511,23 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
+        * Returns the time when the given was first followed by any local Sone.
+        *
+        * @param sone
+        *            The Sone to get the time for
+        * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
+        *         been followed, or {@link Long#MAX_VALUE}
+        */
+       public long getSoneFollowingTime(Sone sone) {
+               synchronized (soneFollowingTimes) {
+                       if (soneFollowingTimes.containsKey(sone)) {
+                               return soneFollowingTimes.get(sone);
+                       }
+                       return Long.MAX_VALUE;
+               }
+       }
+
+       /**
         * Returns whether the target Sone is trusted by the origin Sone.
         *
         * @param origin
@@ -626,7 +567,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                synchronized (posts) {
                        Post post = posts.get(postId);
                        if ((post == null) && create) {
-                               post = new Post(postId);
+                               post = new PostImpl(postId);
                                posts.put(postId, post);
                        }
                        return post;
@@ -634,20 +575,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Returns whether the given post ID is new.
-        *
-        * @param postId
-        *            The post ID
-        * @return {@code true} if the post is considered to be new, {@code false}
-        *         otherwise
-        */
-       public boolean isNewPost(String postId) {
-               synchronized (newPosts) {
-                       return !knownPosts.contains(postId) && newPosts.contains(postId);
-               }
-       }
-
-       /**
         * Returns all posts that have the given Sone as recipient.
         *
         * @see Post#getRecipient()
@@ -676,7 +603,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The ID of the reply to get
         * @return The reply
         */
-       public Reply getReply(String replyId) {
+       public PostReply getReply(String replyId) {
                return getReply(replyId, true);
        }
 
@@ -692,11 +619,11 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            to return {@code null} if no reply can be found
         * @return The reply, or {@code null} if there is no such reply
         */
-       public Reply getReply(String replyId, boolean create) {
+       public PostReply getReply(String replyId, boolean create) {
                synchronized (replies) {
-                       Reply reply = replies.get(replyId);
+                       PostReply reply = replies.get(replyId);
                        if (create && (reply == null)) {
-                               reply = new Reply(replyId);
+                               reply = new PostReply(replyId);
                                replies.put(replyId, reply);
                        }
                        return reply;
@@ -710,11 +637,11 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The post to get all replies for
         * @return All replies for the given post
         */
-       public List<Reply> getReplies(Post post) {
+       public List<PostReply> getReplies(Post post) {
                Set<Sone> sones = getSones();
-               List<Reply> replies = new ArrayList<Reply>();
+               List<PostReply> replies = new ArrayList<PostReply>();
                for (Sone sone : sones) {
-                       for (Reply reply : sone.getReplies()) {
+                       for (PostReply reply : sone.getReplies()) {
                                if (reply.getPost().equals(post)) {
                                        replies.add(reply);
                                }
@@ -725,20 +652,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Returns whether the reply with the given ID is new.
-        *
-        * @param replyId
-        *            The ID of the reply to check
-        * @return {@code true} if the reply is considered to be new, {@code false}
-        *         otherwise
-        */
-       public boolean isNewReply(String replyId) {
-               synchronized (newReplies) {
-                       return !knownReplies.contains(replyId) && newReplies.contains(replyId);
-               }
-       }
-
-       /**
         * Returns all Sones that have liked the given post.
         *
         * @param post
@@ -762,7 +675,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The reply to get the liking Sones for
         * @return The Sones that like the given reply
         */
-       public Set<Sone> getLikes(Reply reply) {
+       public Set<Sone> getLikes(PostReply reply) {
                Set<Sone> sones = new HashSet<Sone>();
                for (Sone sone : getSones()) {
                        if (sone.getLikedReplyIds().contains(reply.getId())) {
@@ -935,29 +848,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Adds a local Sone from the given ID which has to be the ID of an own
-        * identity.
-        *
-        * @param id
-        *            The ID of an own identity to add a Sone for
-        * @return The added (or already existing) Sone
-        */
-       public Sone addLocalSone(String id) {
-               synchronized (localSones) {
-                       if (localSones.containsKey(id)) {
-                               logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
-                               return localSones.get(id);
-                       }
-                       OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
-                       if (ownIdentity == null) {
-                               logger.log(Level.INFO, "Invalid Sone ID: %s", id);
-                               return null;
-                       }
-                       return addLocalSone(ownIdentity);
-               }
-       }
-
-       /**
         * Adds a local Sone from the given own identity.
         *
         * @param ownIdentity
@@ -974,17 +864,18 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        try {
                                sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
                        } catch (MalformedURLException mue1) {
-                               logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
+                               logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
                                return null;
                        }
                        sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
                        sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
+                       sone.setKnown(true);
                        /* TODO - load posts ’n stuff */
                        localSones.put(ownIdentity.getId(), sone);
                        final SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
                        soneInserter.addSoneInsertListener(this);
                        soneInserters.put(sone, soneInserter);
-                       setSoneStatus(sone, SoneStatus.idle);
+                       sone.setStatus(SoneStatus.idle);
                        loadSone(sone);
                        soneInserter.start();
                        return sone;
@@ -999,15 +890,19 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @return The created Sone
         */
        public Sone createSone(OwnIdentity ownIdentity) {
-               try {
-                       ownIdentity.addContext("Sone");
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.SEVERE, "Could not add “Sone” context to own identity: " + ownIdentity, wote1);
+               if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
+                       logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
                        return null;
                }
                Sone sone = addLocalSone(ownIdentity);
                sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
-               sone.addFriend("nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
+               sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
+               sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
+               sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
+               sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
+               sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
+
+               followSone(sone, getSone("nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI"));
                touchConfiguration();
                return sone;
        }
@@ -1025,30 +920,25 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        return null;
                }
                synchronized (remoteSones) {
-                       final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
+                       final Sone sone = getRemoteSone(identity.getId(), true).setIdentity(identity);
                        boolean newSone = sone.getRequestUri() == null;
                        sone.setRequestUri(getSoneUri(identity.getRequestUri()));
                        sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
                        if (newSone) {
-                               synchronized (newSones) {
+                               synchronized (knownSones) {
                                        newSone = !knownSones.contains(sone.getId());
-                                       if (newSone) {
-                                               newSones.add(sone.getId());
-                                       }
                                }
+                               sone.setKnown(!newSone);
                                if (newSone) {
                                        coreListenerManager.fireNewSoneFound(sone);
                                        for (Sone localSone : getLocalSones()) {
                                                if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
-                                                       localSone.addFriend(sone.getId());
-                                                       touchConfiguration();
+                                                       followSone(localSone, sone);
                                                }
                                        }
                                }
                        }
-                       remoteSones.put(identity.getId(), sone);
                        soneDownloader.addSone(sone);
-                       setSoneStatus(sone, SoneStatus.unknown);
                        soneDownloaders.execute(new Runnable() {
 
                                @Override
@@ -1063,6 +953,95 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
+        * Lets the given local Sone follow the Sone with the given ID.
+        *
+        * @param sone
+        *            The local Sone that should follow another Sone
+        * @param soneId
+        *            The ID of the Sone to follow
+        */
+       public void followSone(Sone sone, String soneId) {
+               Validation.begin().isNotNull("Sone", sone).isNotNull("Sone ID", soneId).check();
+               Sone followedSone = getSone(soneId, true);
+               if (followedSone == null) {
+                       logger.log(Level.INFO, String.format("Ignored Sone with invalid ID: %s", soneId));
+                       return;
+               }
+               followSone(sone, getSone(soneId));
+       }
+
+       /**
+        * Lets the given local Sone follow the other given Sone. If the given Sone
+        * was not followed by any local Sone before, this will mark all elements of
+        * the followed Sone as read that have been created before the current
+        * moment.
+        *
+        * @param sone
+        *            The local Sone that should follow the other Sone
+        * @param followedSone
+        *            The Sone that should be followed
+        */
+       public void followSone(Sone sone, Sone followedSone) {
+               Validation.begin().isNotNull("Sone", sone).isNotNull("Followed Sone", followedSone).check();
+               sone.addFriend(followedSone.getId());
+               synchronized (soneFollowingTimes) {
+                       if (!soneFollowingTimes.containsKey(followedSone)) {
+                               long now = System.currentTimeMillis();
+                               soneFollowingTimes.put(followedSone, now);
+                               for (Post post : followedSone.getPosts()) {
+                                       if (post.getTime() < now) {
+                                               markPostKnown(post);
+                                       }
+                               }
+                               for (PostReply reply : followedSone.getReplies()) {
+                                       if (reply.getTime() < now) {
+                                               markReplyKnown(reply);
+                                       }
+                               }
+                       }
+               }
+               touchConfiguration();
+       }
+
+       /**
+        * Lets the given local Sone unfollow the Sone with the given ID.
+        *
+        * @param sone
+        *            The local Sone that should unfollow another Sone
+        * @param soneId
+        *            The ID of the Sone being unfollowed
+        */
+       public void unfollowSone(Sone sone, String soneId) {
+               Validation.begin().isNotNull("Sone", sone).isNotNull("Sone ID", soneId).check();
+               unfollowSone(sone, getSone(soneId, false));
+       }
+
+       /**
+        * Lets the given local Sone unfollow the other given Sone. If the given
+        * local Sone is the last local Sone that followed the given Sone, its
+        * following time will be removed.
+        *
+        * @param sone
+        *            The local Sone that should unfollow another Sone
+        * @param unfollowedSone
+        *            The Sone being unfollowed
+        */
+       public void unfollowSone(Sone sone, Sone unfollowedSone) {
+               Validation.begin().isNotNull("Sone", sone).isNotNull("Unfollowed Sone", unfollowedSone).check();
+               sone.removeFriend(unfollowedSone.getId());
+               boolean unfollowedSoneStillFollowed = false;
+               for (Sone localSone : getLocalSones()) {
+                       unfollowedSoneStillFollowed |= localSone.hasFriend(unfollowedSone.getId());
+               }
+               if (!unfollowedSoneStillFollowed) {
+                       synchronized (soneFollowingTimes) {
+                               soneFollowingTimes.remove(unfollowedSone);
+                       }
+               }
+               touchConfiguration();
+       }
+
+       /**
         * Retrieves the trust relationship from the origin to the target. If the
         * trust relationship can not be retrieved, {@code null} is returned.
         *
@@ -1075,9 +1054,10 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public Trust getTrust(Sone origin, Sone target) {
                if (!isLocalSone(origin)) {
-                       logger.log(Level.WARNING, "Tried to get trust from remote Sone: %s", origin);
+                       logger.log(Level.WARNING, String.format("Tried to get trust from remote Sone: %s", origin));
                        return null;
                }
+               webOfTrustUpdater.getTrust((OwnIdentity) origin.getIdentity(), target.getIdentity());
                return target.getIdentity().getTrust((OwnIdentity) origin.getIdentity());
        }
 
@@ -1093,11 +1073,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void setTrust(Sone origin, Sone target, int trustValue) {
                Validation.begin().isNotNull("Trust Origin", origin).check().isInstanceOf("Trust Origin", origin.getIdentity(), OwnIdentity.class).isNotNull("Trust Target", target).isLessOrEqual("Trust Value", trustValue, 100).isGreaterOrEqual("Trust Value", trustValue, -100).check();
-               try {
-                       ((OwnIdentity) origin.getIdentity()).setTrust(target.getIdentity(), trustValue, preferences.getTrustComment());
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not set trust for Sone: " + target, wote1);
-               }
+               webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
        }
 
        /**
@@ -1110,11 +1086,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void removeTrust(Sone origin, Sone target) {
                Validation.begin().isNotNull("Trust Origin", origin).isNotNull("Trust Target", target).check().isInstanceOf("Trust Origin Identity", origin.getIdentity(), OwnIdentity.class).check();
-               try {
-                       ((OwnIdentity) origin.getIdentity()).removeTrust(target.getIdentity());
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not remove trust for Sone: " + target, wote1);
-               }
+               webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
        }
 
        /**
@@ -1178,7 +1150,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                if (hasSone(sone.getId())) {
                        Sone storedSone = getSone(sone.getId());
                        if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
-                               logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
+                               logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
                                return;
                        }
                        synchronized (posts) {
@@ -1191,12 +1163,16 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                        }
                                }
                                List<Post> storedPosts = storedSone.getPosts();
-                               synchronized (newPosts) {
+                               synchronized (knownPosts) {
                                        for (Post post : sone.getPosts()) {
-                                               post.setSone(storedSone);
-                                               if (!storedPosts.contains(post) && !knownPosts.contains(post.getId())) {
-                                                       newPosts.add(post.getId());
-                                                       coreListenerManager.fireNewPostFound(post);
+                                               post.setSone(storedSone).setKnown(knownPosts.contains(post.getId()));
+                                               if (!storedPosts.contains(post)) {
+                                                       if (post.getTime() < getSoneFollowingTime(sone)) {
+                                                               knownPosts.add(post.getId());
+                                                       } else if (!knownPosts.contains(post.getId())) {
+                                                               sone.setKnown(false);
+                                                               coreListenerManager.fireNewPostFound(post);
+                                                       }
                                                }
                                                posts.put(post.getId(), post);
                                        }
@@ -1204,20 +1180,24 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        }
                        synchronized (replies) {
                                if (!soneRescueMode) {
-                                       for (Reply reply : storedSone.getReplies()) {
+                                       for (PostReply reply : storedSone.getReplies()) {
                                                replies.remove(reply.getId());
                                                if (!sone.getReplies().contains(reply)) {
                                                        coreListenerManager.fireReplyRemoved(reply);
                                                }
                                        }
                                }
-                               Set<Reply> storedReplies = storedSone.getReplies();
-                               synchronized (newReplies) {
-                                       for (Reply reply : sone.getReplies()) {
-                                               reply.setSone(storedSone);
-                                               if (!storedReplies.contains(reply) && !knownReplies.contains(reply.getId())) {
-                                                       newReplies.add(reply.getId());
-                                                       coreListenerManager.fireNewReplyFound(reply);
+                               Set<PostReply> storedReplies = storedSone.getReplies();
+                               synchronized (knownReplies) {
+                                       for (PostReply reply : sone.getReplies()) {
+                                               reply.setSone(storedSone).setKnown(knownReplies.contains(reply.getId()));
+                                               if (!storedReplies.contains(reply)) {
+                                                       if (reply.getTime() < getSoneFollowingTime(sone)) {
+                                                               knownReplies.add(reply.getId());
+                                                       } else if (!knownReplies.contains(reply.getId())) {
+                                                               reply.setKnown(false);
+                                                               coreListenerManager.fireNewReplyFound(reply);
+                                                       }
                                                }
                                                replies.put(reply.getId(), reply);
                                        }
@@ -1249,7 +1229,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                        for (Post post : sone.getPosts()) {
                                                storedSone.addPost(post);
                                        }
-                                       for (Reply reply : sone.getReplies()) {
+                                       for (PostReply reply : sone.getReplies()) {
                                                storedSone.addReply(reply);
                                        }
                                        for (String likedPostId : sone.getLikedPostIds()) {
@@ -1283,12 +1263,12 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void deleteSone(Sone sone) {
                if (!(sone.getIdentity() instanceof OwnIdentity)) {
-                       logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
+                       logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
                        return;
                }
                synchronized (localSones) {
                        if (!localSones.containsKey(sone.getId())) {
-                               logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
+                               logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
                                return;
                        }
                        localSones.remove(sone.getId());
@@ -1296,12 +1276,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        soneInserter.removeSoneInsertListener(this);
                        soneInserter.stop();
                }
-               try {
-                       ((OwnIdentity) sone.getIdentity()).removeContext("Sone");
-                       ((OwnIdentity) sone.getIdentity()).removeProperty("Sone.LatestEdition");
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not remove context and properties from Sone: " + sone, wote1);
-               }
+               webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
+               webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
                try {
                        configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
                } catch (ConfigurationException ce1) {
@@ -1310,19 +1286,20 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Marks the given Sone as known. If the Sone was {@link #isNewPost(String)
-        * new} before, a {@link CoreListener#markSoneKnown(Sone)} event is fired.
+        * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
+        * known} before, a {@link CoreListener#markSoneKnown(Sone)} event is fired.
         *
         * @param sone
         *            The Sone to mark as known
         */
        public void markSoneKnown(Sone sone) {
-               synchronized (newSones) {
-                       if (newSones.remove(sone.getId())) {
+               if (!sone.isKnown()) {
+                       sone.setKnown(true);
+                       synchronized (knownSones) {
                                knownSones.add(sone.getId());
-                               coreListenerManager.fireMarkSoneKnown(sone);
-                               touchConfiguration();
                        }
+                       coreListenerManager.fireMarkSoneKnown(sone);
+                       touchConfiguration();
                }
        }
 
@@ -1335,13 +1312,17 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void loadSone(Sone sone) {
                if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
+                       logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
                        return;
                }
 
                /* initialize options. */
                sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
                sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
+               sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
+               sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
+               sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
+               sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 
                /* load Sone. */
                String sonePrefix = "Sone/" + sone.getId();
@@ -1353,7 +1334,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 
                /* load profile. */
-               Profile profile = new Profile();
+               Profile profile = new Profile(sone);
                profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
                profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
                profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
@@ -1395,7 +1376,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                }
 
                /* load replies. */
-               Set<Reply> replies = new HashSet<Reply>();
+               Set<PostReply> replies = new HashSet<PostReply>();
                while (true) {
                        String replyPrefix = sonePrefix + "/Replies/" + replies.size();
                        String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
@@ -1463,12 +1444,14 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        if (albumParentId != null) {
                                Album parentAlbum = getAlbum(albumParentId, false);
                                if (parentAlbum == null) {
-                                       logger.log(Level.WARNING, "Invalid parent album ID: " + albumParentId);
+                                       logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
                                        return;
                                }
                                parentAlbum.addAlbum(album);
                        } else {
-                               topLevelAlbums.add(album);
+                               if (!topLevelAlbums.contains(album)) {
+                                       topLevelAlbums.add(album);
+                               }
                        }
                }
 
@@ -1501,9 +1484,19 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        album.addImage(image);
                }
 
+               /* load avatar. */
+               String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
+               if (avatarId != null) {
+                       profile.setAvatar(getImage(avatarId, false));
+               }
+
                /* load options. */
                sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
                sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
+               sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
+               sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
+               sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
+               sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
 
                /* if we’re still here, Sone was loaded successfully. */
                synchronized (sone) {
@@ -1513,22 +1506,24 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        sone.setReplies(replies);
                        sone.setLikePostIds(likedPostIds);
                        sone.setLikeReplyIds(likedReplyIds);
-                       sone.setFriends(friends);
+                       for (String friendId : friends) {
+                               followSone(sone, friendId);
+                       }
                        sone.setAlbums(topLevelAlbums);
                        soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
                }
-               synchronized (newSones) {
+               synchronized (knownSones) {
                        for (String friend : friends) {
                                knownSones.add(friend);
                        }
                }
-               synchronized (newPosts) {
+               synchronized (knownPosts) {
                        for (Post post : posts) {
                                knownPosts.add(post.getId());
                        }
                }
-               synchronized (newReplies) {
-                       for (Reply reply : replies) {
+               synchronized (knownReplies) {
+                       for (PostReply reply : replies) {
                                knownReplies.add(reply.getId());
                        }
                }
@@ -1594,20 +1589,17 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public Post createPost(Sone sone, Sone recipient, long time, String text) {
                if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
+                       logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
                        return null;
                }
-               final Post post = new Post(sone, time, text);
+               final Post post = new PostImpl(sone, time, text);
                if (recipient != null) {
                        post.setRecipient(recipient);
                }
                synchronized (posts) {
                        posts.put(post.getId(), post);
                }
-               synchronized (newPosts) {
-                       newPosts.add(post.getId());
-                       coreListenerManager.fireNewPostFound(post);
-               }
+               coreListenerManager.fireNewPostFound(post);
                sone.addPost(post);
                touchConfiguration();
                localElementTicker.registerEvent(System.currentTimeMillis() + 10 * 1000, new Runnable() {
@@ -1631,7 +1623,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        public void deletePost(Post post) {
                if (!isLocalSone(post.getSone())) {
-                       logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
+                       logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
                        return;
                }
                post.getSone().removePost(post);
@@ -1639,28 +1631,28 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        posts.remove(post.getId());
                }
                coreListenerManager.firePostRemoved(post);
-               synchronized (newPosts) {
-                       markPostKnown(post);
-                       knownPosts.remove(post.getId());
-               }
+               markPostKnown(post);
                touchConfiguration();
        }
 
        /**
-        * Marks the given post as known, if it is currently a new post (according
-        * to {@link #isNewPost(String)}).
+        * Marks the given post as known, if it is currently not a known post
+        * (according to {@link Post#isKnown()}).
         *
         * @param post
         *            The post to mark as known
         */
        public void markPostKnown(Post post) {
-               synchronized (newPosts) {
-                       if (newPosts.remove(post.getId())) {
-                               knownPosts.add(post.getId());
-                               coreListenerManager.fireMarkPostKnown(post);
+               post.setKnown(true);
+               synchronized (knownPosts) {
+                       coreListenerManager.fireMarkPostKnown(post);
+                       if (knownPosts.add(post.getId())) {
                                touchConfiguration();
                        }
                }
+               for (PostReply reply : getReplies(post)) {
+                       markReplyKnown(reply);
+               }
        }
 
        /**
@@ -1718,7 +1710,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The text of the reply
         * @return The created reply
         */
-       public Reply createReply(Sone sone, Post post, String text) {
+       public PostReply createReply(Sone sone, Post post, String text) {
                return createReply(sone, post, System.currentTimeMillis(), text);
        }
 
@@ -1735,17 +1727,16 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         *            The text of the reply
         * @return The created reply
         */
-       public Reply createReply(Sone sone, Post post, long time, String text) {
+       public PostReply createReply(Sone sone, Post post, long time, String text) {
                if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
+                       logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
                        return null;
                }
-               final Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
+               final PostReply reply = new PostReply(sone, post, System.currentTimeMillis(), text);
                synchronized (replies) {
                        replies.put(reply.getId(), reply);
                }
-               synchronized (newReplies) {
-                       newReplies.add(reply.getId());
+               synchronized (knownReplies) {
                        coreListenerManager.fireNewReplyFound(reply);
                }
                sone.addReply(reply);
@@ -1769,16 +1760,16 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         * @param reply
         *            The reply to delete
         */
-       public void deleteReply(Reply reply) {
+       public void deleteReply(PostReply reply) {
                Sone sone = reply.getSone();
                if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
+                       logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
                        return;
                }
                synchronized (replies) {
                        replies.remove(reply.getId());
                }
-               synchronized (newReplies) {
+               synchronized (knownReplies) {
                        markReplyKnown(reply);
                        knownReplies.remove(reply.getId());
                }
@@ -1787,17 +1778,17 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
        }
 
        /**
-        * Marks the given reply as known, if it is currently a new reply (according
-        * to {@link #isNewReply(String)}).
+        * Marks the given reply as known, if it is currently not a known reply
+        * (according to {@link Reply#isKnown()}).
         *
         * @param reply
         *            The reply to mark as known
         */
-       public void markReplyKnown(Reply reply) {
-               synchronized (newReplies) {
-                       if (newReplies.remove(reply.getId())) {
-                               knownReplies.add(reply.getId());
-                               coreListenerManager.fireMarkReplyKnown(reply);
+       public void markReplyKnown(PostReply reply) {
+               reply.setKnown(true);
+               synchronized (knownReplies) {
+                       coreListenerManager.fireMarkReplyKnown(reply);
+                       if (knownReplies.add(reply.getId())) {
                                touchConfiguration();
                        }
                }
@@ -1858,7 +1849,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                synchronized (albums) {
                        albums.remove(album.getId());
                }
-               saveSone(album.getSone());
+               touchConfiguration();
        }
 
        /**
@@ -1898,7 +1889,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                synchronized (images) {
                        images.remove(image.getId());
                }
-               saveSone(image.getSone());
+               touchConfiguration();
        }
 
        /**
@@ -1968,6 +1959,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                loadConfiguration();
                updateChecker.addUpdateListener(this);
                updateChecker.start();
+               webOfTrustUpdater.start();
        }
 
        /**
@@ -2000,6 +1992,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                                soneInserter.stop();
                        }
                }
+               webOfTrustUpdater.stop();
                updateChecker.stop();
                updateChecker.removeUpdateListener(this);
                soneDownloader.stop();
@@ -2018,18 +2011,16 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        private synchronized void saveSone(Sone sone) {
                if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
+                       logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
                        return;
                }
                if (!(sone.getIdentity() instanceof OwnIdentity)) {
-                       logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
+                       logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
                        return;
                }
 
-               logger.log(Level.INFO, "Saving Sone: %s", sone);
+               logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
                try {
-                       ((OwnIdentity) sone.getIdentity()).setProperty("Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
-
                        /* save Sone into configuration. */
                        String sonePrefix = "Sone/" + sone.getId();
                        configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
@@ -2043,6 +2034,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
                        configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
                        configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
+                       configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
 
                        /* save profile fields. */
                        int fieldCounter = 0;
@@ -2066,7 +2058,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
                        /* save replies. */
                        int replyCounter = 0;
-                       for (Reply reply : sone.getReplies()) {
+                       for (PostReply reply : sone.getReplies()) {
                                String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
                                configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
                                configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
@@ -2132,14 +2124,19 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
                        /* save options. */
                        configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
+                       configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
+                       configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
+                       configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
                        configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
+                       configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
 
                        configuration.save();
-                       logger.log(Level.INFO, "Sone %s saved.", sone);
+
+                       webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
+
+                       logger.log(Level.INFO, String.format("Sone %s saved.", sone));
                } catch (ConfigurationException ce1) {
-                       logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
-               } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not set WoT property for Sone: " + sone, wote1);
+                       logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
                }
        }
 
@@ -2160,6 +2157,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
                        configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
                        configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
+                       configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
                        configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
                        configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
                        configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
@@ -2168,22 +2166,30 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
                        configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
                        configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
-                       configuration.getBooleanValue("Option/SoneRescueMode").setValue(options.getBooleanOption("SoneRescueMode").getReal());
-                       configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
-                       configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
 
                        /* save known Sones. */
                        int soneCounter = 0;
-                       synchronized (newSones) {
+                       synchronized (knownSones) {
                                for (String knownSoneId : knownSones) {
                                        configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
                                }
                                configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
                        }
 
+                       /* save Sone following times. */
+                       soneCounter = 0;
+                       synchronized (soneFollowingTimes) {
+                               for (Entry<Sone, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
+                                       configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey().getId());
+                                       configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
+                                       ++soneCounter;
+                               }
+                               configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
+                       }
+
                        /* save known posts. */
                        int postCounter = 0;
-                       synchronized (newPosts) {
+                       synchronized (knownPosts) {
                                for (String knownPostId : knownPosts) {
                                        configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
                                }
@@ -2192,7 +2198,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
                        /* save known replies. */
                        int replyCounter = 0;
-                       synchronized (newReplies) {
+                       synchronized (knownReplies) {
                                for (String knownReplyId : knownReplies) {
                                        configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
                                }
@@ -2235,6 +2241,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
 
                }));
                options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangeValidator(1, Integer.MAX_VALUE)));
+               options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangeValidator(1, Integer.MAX_VALUE)));
                options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, new OrValidator<Integer>(new IntegerRangeValidator(50, Integer.MAX_VALUE), new EqualityValidator<Integer>(-1))));
                options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, new OrValidator<Integer>(new IntegerRangeValidator(50, Integer.MAX_VALUE), new EqualityValidator<Integer>(-1))));
                options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
@@ -2258,23 +2265,10 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        }
 
                }));
-               options.addBooleanOption("SoneRescueMode", new DefaultOption<Boolean>(false));
-               options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
-               options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
-
-               /* read options from configuration. */
-               options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
-               options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
-               boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
-               options.getBooleanOption("ClearOnNextRestart").set(null);
-               options.getBooleanOption("ReallyClearOnNextRestart").set(null);
-               if (clearConfiguration) {
-                       /* stop loading the configuration. */
-                       return;
-               }
 
                loadConfigurationValue("InsertionDelay");
                loadConfigurationValue("PostsPerPage");
+               loadConfigurationValue("ImagesPerPage");
                loadConfigurationValue("CharactersPerPost");
                loadConfigurationValue("PostCutOffLength");
                options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
@@ -2283,7 +2277,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
                options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
                options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
-               options.getBooleanOption("SoneRescueMode").set(configuration.getBooleanValue("Option/SoneRescueMode").getValue(null));
 
                /* load known Sones. */
                int soneCounter = 0;
@@ -2292,11 +2285,30 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        if (knownSoneId == null) {
                                break;
                        }
-                       synchronized (newSones) {
+                       synchronized (knownSones) {
                                knownSones.add(knownSoneId);
                        }
                }
 
+               /* load Sone following times. */
+               soneCounter = 0;
+               while (true) {
+                       String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
+                       if (soneId == null) {
+                               break;
+                       }
+                       long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
+                       Sone followedSone = getSone(soneId);
+                       if (followedSone == null) {
+                               logger.log(Level.WARNING, String.format("Ignoring Sone with invalid ID: %s", soneId));
+                       } else {
+                               synchronized (soneFollowingTimes) {
+                                       soneFollowingTimes.put(getSone(soneId), time);
+                               }
+                       }
+                       ++soneCounter;
+               }
+
                /* load known posts. */
                int postCounter = 0;
                while (true) {
@@ -2304,7 +2316,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        if (knownPostId == null) {
                                break;
                        }
-                       synchronized (newPosts) {
+                       synchronized (knownPosts) {
                                knownPosts.add(knownPostId);
                        }
                }
@@ -2316,7 +2328,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        if (knownReplyId == null) {
                                break;
                        }
-                       synchronized (newReplies) {
+                       synchronized (knownReplies) {
                                knownReplies.add(knownReplyId);
                        }
                }
@@ -2346,7 +2358,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                try {
                        options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
                } catch (IllegalArgumentException iae1) {
-                       logger.log(Level.WARNING, "Invalid value for " + optionName + " in configuration, using default.");
+                       logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
                }
        }
 
@@ -2362,7 +2374,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
                        return uri;
                } catch (MalformedURLException mue1) {
-                       logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
+                       logger.log(Level.WARNING, String.format("Could not create Sone URI from URI: %s", uriString), mue1);
                        return null;
                }
        }
@@ -2376,7 +2388,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void ownIdentityAdded(OwnIdentity ownIdentity) {
-               logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
+               logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
                if (ownIdentity.hasContext("Sone")) {
                        trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
                        addLocalSone(ownIdentity);
@@ -2388,7 +2400,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void ownIdentityRemoved(OwnIdentity ownIdentity) {
-               logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
+               logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
                trustedIdentities.remove(ownIdentity);
        }
 
@@ -2397,7 +2409,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void identityAdded(OwnIdentity ownIdentity, Identity identity) {
-               logger.log(Level.FINEST, "Adding Identity: " + identity);
+               logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
                trustedIdentities.get(ownIdentity).add(identity);
                addRemoteSone(identity);
        }
@@ -2412,7 +2424,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        @Override
                        @SuppressWarnings("synthetic-access")
                        public void run() {
-                               Sone sone = getRemoteSone(identity.getId());
+                               Sone sone = getRemoteSone(identity.getId(), false);
                                sone.setIdentity(identity);
                                sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
                                soneDownloader.addSone(sone);
@@ -2446,19 +2458,17 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        return;
                }
                synchronized (posts) {
-                       synchronized (newPosts) {
+                       synchronized (knownPosts) {
                                for (Post post : sone.getPosts()) {
                                        posts.remove(post.getId());
-                                       newPosts.remove(post.getId());
                                        coreListenerManager.firePostRemoved(post);
                                }
                        }
                }
                synchronized (replies) {
-                       synchronized (newReplies) {
-                               for (Reply reply : sone.getReplies()) {
+                       synchronized (knownReplies) {
+                               for (PostReply reply : sone.getReplies()) {
                                        replies.remove(reply.getId());
-                                       newReplies.remove(reply.getId());
                                        coreListenerManager.fireReplyRemoved(reply);
                                }
                        }
@@ -2466,10 +2476,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                synchronized (remoteSones) {
                        remoteSones.remove(identity.getId());
                }
-               synchronized (newSones) {
-                       newSones.remove(identity.getId());
-                       coreListenerManager.fireSoneRemoved(sone);
-               }
+               coreListenerManager.fireSoneRemoved(sone);
        }
 
        //
@@ -2521,7 +2528,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void imageInsertStarted(Image image) {
-               logger.log(Level.WARNING, "Image insert started for " + image);
+               logger.log(Level.WARNING, String.format("Image insert started for %s...", image));
                coreListenerManager.fireImageInsertStarted(image);
        }
 
@@ -2530,7 +2537,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void imageInsertAborted(Image image) {
-               logger.log(Level.WARNING, "Image insert aborted for " + image);
+               logger.log(Level.WARNING, String.format("Image insert aborted for %s.", image));
                coreListenerManager.fireImageInsertAborted(image);
        }
 
@@ -2539,10 +2546,10 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void imageInsertFinished(Image image, FreenetURI key) {
-               logger.log(Level.WARNING, "Image insert finished for " + image + ": " + key);
+               logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", image, key));
                image.setKey(key.toString());
                deleteTemporaryImage(image.getId());
-               saveSone(image.getSone());
+               touchConfiguration();
                coreListenerManager.fireImageInsertFinished(image);
        }
 
@@ -2551,7 +2558,7 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
         */
        @Override
        public void imageInsertFailed(Image image, Throwable cause) {
-               logger.log(Level.WARNING, "Image insert failed for " + image, cause);
+               logger.log(Level.WARNING, String.format("Image insert failed for %s." + image), cause);
                coreListenerManager.fireImageInsertFailed(image, cause);
        }
 
@@ -2590,8 +2597,8 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                 *
                 * @param insertionDelay
                 *            The insertion delay to validate
-                * @return {@code true} if the given insertion delay was valid, {@code
-                *         false} otherwise
+                * @return {@code true} if the given insertion delay was valid,
+                *         {@code false} otherwise
                 */
                public boolean validateInsertionDelay(Integer insertionDelay) {
                        return options.getIntegerOption("InsertionDelay").validate(insertionDelay);
@@ -2644,6 +2651,39 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                }
 
                /**
+                * Returns the number of images to show per page.
+                *
+                * @return The number of images to show per page
+                */
+               public int getImagesPerPage() {
+                       return options.getIntegerOption("ImagesPerPage").get();
+               }
+
+               /**
+                * Validates the number of images per page.
+                *
+                * @param imagesPerPage
+                *            The number of images per page
+                * @return {@code true} if the number of images per page was valid,
+                *         {@code false} otherwise
+                */
+               public boolean validateImagesPerPage(Integer imagesPerPage) {
+                       return options.getIntegerOption("ImagesPerPage").validate(imagesPerPage);
+               }
+
+               /**
+                * Sets the number of images per page.
+                *
+                * @param imagesPerPage
+                *            The number of images per page
+                * @return This preferences object
+                */
+               public Preferences setImagesPerPage(Integer imagesPerPage) {
+                       options.getIntegerOption("ImagesPerPage").set(imagesPerPage);
+                       return this;
+               }
+
+               /**
                 * Returns the number of characters per post, or <code>-1</code> if the
                 * posts should not be cut off.
                 *
@@ -2874,58 +2914,6 @@ public class Core extends AbstractService implements IdentityListener, UpdateLis
                        return this;
                }
 
-               /**
-                * Returns whether Sone should clear its settings on the next restart.
-                * In order to be effective, {@link #isReallyClearOnNextRestart()} needs
-                * to return {@code true} as well!
-                *
-                * @return {@code true} if Sone should clear its settings on the next
-                *         restart, {@code false} otherwise
-                */
-               public boolean isClearOnNextRestart() {
-                       return options.getBooleanOption("ClearOnNextRestart").get();
-               }
-
-               /**
-                * Sets whether Sone will clear its settings on the next restart.
-                *
-                * @param clearOnNextRestart
-                *            {@code true} if Sone should clear its settings on the next
-                *            restart, {@code false} otherwise
-                * @return This preferences
-                */
-               public Preferences setClearOnNextRestart(Boolean clearOnNextRestart) {
-                       options.getBooleanOption("ClearOnNextRestart").set(clearOnNextRestart);
-                       return this;
-               }
-
-               /**
-                * Returns whether Sone should really clear its settings on next
-                * restart. This is a confirmation option that needs to be set in
-                * addition to {@link #isClearOnNextRestart()} in order to clear Sone’s
-                * settings on the next restart.
-                *
-                * @return {@code true} if Sone should really clear its settings on the
-                *         next restart, {@code false} otherwise
-                */
-               public boolean isReallyClearOnNextRestart() {
-                       return options.getBooleanOption("ReallyClearOnNextRestart").get();
-               }
-
-               /**
-                * Sets whether Sone should really clear its settings on the next
-                * restart.
-                *
-                * @param reallyClearOnNextRestart
-                *            {@code true} if Sone should really clear its settings on
-                *            the next restart, {@code false} otherwise
-                * @return This preferences
-                */
-               public Preferences setReallyClearOnNextRestart(Boolean reallyClearOnNextRestart) {
-                       options.getBooleanOption("ReallyClearOnNextRestart").set(reallyClearOnNextRestart);
-                       return this;
-               }
-
        }
 
 }