Fix ALL the logging!
[Sone.git] / src / main / java / net / pterodactylus / sone / core / Core.java
index 08cd1cc..26d21ed 100644 (file)
@@ -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;
@@ -34,12 +34,20 @@ import java.util.logging.Logger;
 import net.pterodactylus.sone.core.Options.DefaultOption;
 import net.pterodactylus.sone.core.Options.Option;
 import net.pterodactylus.sone.core.Options.OptionWatcher;
+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.fcp.FcpInterface;
+import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
 import net.pterodactylus.sone.freenet.wot.Identity;
 import net.pterodactylus.sone.freenet.wot.IdentityListener;
 import net.pterodactylus.sone.freenet.wot.IdentityManager;
@@ -51,6 +59,11 @@ import net.pterodactylus.util.config.Configuration;
 import net.pterodactylus.util.config.ConfigurationException;
 import net.pterodactylus.util.logging.Logging;
 import net.pterodactylus.util.number.Numbers;
+import net.pterodactylus.util.service.AbstractService;
+import net.pterodactylus.util.thread.Ticker;
+import net.pterodactylus.util.validation.EqualityValidator;
+import net.pterodactylus.util.validation.IntegerRangeValidator;
+import net.pterodactylus.util.validation.OrValidator;
 import net.pterodactylus.util.validation.Validation;
 import net.pterodactylus.util.version.Version;
 import freenet.keys.FreenetURI;
@@ -60,27 +73,7 @@ import freenet.keys.FreenetURI;
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
-public class Core implements IdentityListener, UpdateListener {
-
-       /**
-        * 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,
-       }
+public class Core extends AbstractService implements IdentityListener, UpdateListener, SoneProvider, PostProvider, SoneInsertListener, ImageInsertListener {
 
        /** The logger. */
        private static final Logger logger = Logging.getLogger(Core.class);
@@ -109,18 +102,20 @@ public class Core implements IdentityListener, UpdateListener {
        /** The Sone downloader. */
        private final SoneDownloader soneDownloader;
 
+       /** The image inserter. */
+       private final ImageInserter imageInserter;
+
        /** Sone downloader thread-pool. */
        private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10);
 
        /** The update checker. */
        private final UpdateChecker updateChecker;
 
-       /** Whether the core has been stopped. */
-       private volatile boolean stopped;
+       /** 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. */
@@ -130,6 +125,10 @@ public class Core implements IdentityListener, UpdateListener {
        /* synchronize access on this on localSones. */
        private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 
+       /** Sone rescuers. */
+       /* synchronize access on this on localSones. */
+       private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
+
        /** All local Sones. */
        /* synchronize access on this on itself. */
        private Map<String, Sone> localSones = new HashMap<String, Sone>();
@@ -138,28 +137,17 @@ public class Core implements IdentityListener, UpdateListener {
        /* 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>();
-
        /** All known Sones. */
-       /* synchronize access on {@link #newSones}. */
        private 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>();
-
        /** All known posts. */
-       /* synchronize access on {@link #newPosts}. */
        private 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 Map<String, PostReply> replies = new HashMap<String, PostReply>();
 
        /** All known replies. */
        private Set<String> knownReplies = new HashSet<String>();
@@ -171,6 +159,21 @@ public class Core implements IdentityListener, UpdateListener {
        /** Trusted identities, sorted by own identities. */
        private Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
 
+       /** All known albums. */
+       private Map<String, Album> albums = new HashMap<String, Album>();
+
+       /** All known images. */
+       private Map<String, Image> images = new HashMap<String, Image>();
+
+       /** All temporary images. */
+       private Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
+
+       /** Ticker for threads that mark own elements as known. */
+       private Ticker localElementTicker = new Ticker();
+
+       /** The time the configuration was last touched. */
+       private volatile long lastConfigurationUpdate;
+
        /**
         * Creates a new core.
         *
@@ -182,10 +185,12 @@ public class Core implements IdentityListener, UpdateListener {
         *            The identity manager
         */
        public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
+               super("Sone Core");
                this.configuration = configuration;
                this.freenetInterface = freenetInterface;
                this.identityManager = identityManager;
                this.soneDownloader = new SoneDownloader(this, freenetInterface);
+               this.imageInserter = new ImageInserter(this, freenetInterface);
                this.updateChecker = new UpdateChecker(freenetInterface);
        }
 
@@ -226,7 +231,7 @@ public class Core implements IdentityListener, UpdateListener {
         */
        public void setConfiguration(Configuration configuration) {
                this.configuration = configuration;
-               saveConfiguration();
+               touchConfiguration();
        }
 
        /**
@@ -257,29 +262,32 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * Returns the status of the given Sone.
+        * Sets the FCP interface to use.
         *
-        * @param sone
-        *            The Sone to get the status for
-        * @return The status of the Sone
+        * @param fcpInterface
+        *            The FCP interface to use
         */
-       public SoneStatus getSoneStatus(Sone sone) {
-               synchronized (soneStatuses) {
-                       return soneStatuses.get(sone);
-               }
+       public void setFcpInterface(FcpInterface fcpInterface) {
+               this.fcpInterface = fcpInterface;
        }
 
        /**
-        * Sets the status of the given Sone.
+        * Returns the Sone rescuer for the given local Sone.
         *
         * @param sone
-        *            The Sone to set the status of
-        * @param soneStatus
-        *            The status to set
+        *            The local Sone to get the rescuer for
+        * @return The Sone rescuer for the given Sone
         */
-       public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
-               synchronized (soneStatuses) {
-                       soneStatuses.put(sone, soneStatus);
+       public SoneRescuer getSoneRescuer(Sone sone) {
+               Validation.begin().isNotNull("Sone", sone).check().is("Local Sone", isLocalSone(sone)).check();
+               synchronized (localSones) {
+                       SoneRescuer soneRescuer = soneRescuers.get(sone);
+                       if (soneRescuer == null) {
+                               soneRescuer = new SoneRescuer(this, soneDownloader, sone);
+                               soneRescuers.put(sone, soneRescuer);
+                               soneRescuer.start();
+                       }
+                       return soneRescuer;
                }
        }
 
@@ -334,6 +342,7 @@ public class Core implements IdentityListener, UpdateListener {
         * @return The Sone with the given ID, or {@code null} if there is no such
         *         Sone
         */
+       @Override
        public Sone getSone(String id, boolean create) {
                if (isLocalSone(id)) {
                        return getLocalSone(id);
@@ -418,7 +427,6 @@ public class Core implements IdentityListener, UpdateListener {
                        if ((sone == null) && create) {
                                sone = new Sone(id);
                                localSones.put(id, sone);
-                               setSoneStatus(sone, SoneStatus.unknown);
                        }
                        return sone;
                }
@@ -440,17 +448,6 @@ public class Core implements IdentityListener, UpdateListener {
         *
         * @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
@@ -459,10 +456,9 @@ public class Core implements IdentityListener, UpdateListener {
        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;
                }
@@ -497,19 +493,6 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * 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
@@ -522,6 +505,23 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
+        * 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
@@ -556,6 +556,7 @@ public class Core implements IdentityListener, UpdateListener {
         *            exists, {@code false} to return {@code null}
         * @return The post, or {@code null} if there is no such post
         */
+       @Override
        public Post getPost(String postId, boolean create) {
                synchronized (posts) {
                        Post post = posts.get(postId);
@@ -568,20 +569,6 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * 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()
@@ -610,7 +597,7 @@ public class Core implements IdentityListener, UpdateListener {
         *            The ID of the reply to get
         * @return The reply
         */
-       public Reply getReply(String replyId) {
+       public PostReply getReply(String replyId) {
                return getReply(replyId, true);
        }
 
@@ -626,11 +613,11 @@ public class Core implements IdentityListener, UpdateListener {
         *            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;
@@ -644,11 +631,11 @@ public class Core implements IdentityListener, UpdateListener {
         *            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);
                                }
@@ -659,20 +646,6 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * 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
@@ -696,7 +669,7 @@ public class Core implements IdentityListener, UpdateListener {
         *            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())) {
@@ -750,6 +723,89 @@ public class Core implements IdentityListener, UpdateListener {
                return posts;
        }
 
+       /**
+        * Returns the album with the given ID, creating a new album if no album
+        * with the given ID can be found.
+        *
+        * @param albumId
+        *            The ID of the album
+        * @return The album with the given ID
+        */
+       public Album getAlbum(String albumId) {
+               return getAlbum(albumId, true);
+       }
+
+       /**
+        * Returns the album with the given ID, optionally creating a new album if
+        * an album with the given ID can not be found.
+        *
+        * @param albumId
+        *            The ID of the album
+        * @param create
+        *            {@code true} to create a new album if none exists for the
+        *            given ID
+        * @return The album with the given ID, or {@code null} if no album with the
+        *         given ID exists and {@code create} is {@code false}
+        */
+       public Album getAlbum(String albumId, boolean create) {
+               synchronized (albums) {
+                       Album album = albums.get(albumId);
+                       if (create && (album == null)) {
+                               album = new Album(albumId);
+                               albums.put(albumId, album);
+                       }
+                       return album;
+               }
+       }
+
+       /**
+        * Returns the image with the given ID, creating it if necessary.
+        *
+        * @param imageId
+        *            The ID of the image
+        * @return The image with the given ID
+        */
+       public Image getImage(String imageId) {
+               return getImage(imageId, true);
+       }
+
+       /**
+        * Returns the image with the given ID, optionally creating it if it does
+        * not exist.
+        *
+        * @param imageId
+        *            The ID of the image
+        * @param create
+        *            {@code true} to create an image if none exists with the given
+        *            ID
+        * @return The image with the given ID, or {@code null} if none exists and
+        *         none was created
+        */
+       public Image getImage(String imageId, boolean create) {
+               synchronized (images) {
+                       Image image = images.get(imageId);
+                       if (create && (image == null)) {
+                               image = new Image(imageId);
+                               images.put(imageId, image);
+                       }
+                       return image;
+               }
+       }
+
+       /**
+        * Returns the temporary image with the given ID.
+        *
+        * @param imageId
+        *            The ID of the temporary image
+        * @return The temporary image, or {@code null} if there is no temporary
+        *         image with the given ID
+        */
+       public TemporaryImage getTemporaryImage(String imageId) {
+               synchronized (temporaryImages) {
+                       return temporaryImages.get(imageId);
+               }
+       }
+
        //
        // ACTIONS
        //
@@ -786,29 +842,6 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * 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
@@ -825,44 +858,20 @@ public class Core implements IdentityListener, UpdateListener {
                        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);
-                       if (!preferences.isSoneRescueMode()) {
-                               soneInserter.start();
-                       }
-                       new Thread(new Runnable() {
-
-                               @Override
-                               @SuppressWarnings("synthetic-access")
-                               public void run() {
-                                       if (!preferences.isSoneRescueMode()) {
-                                               return;
-                                       }
-                                       logger.log(Level.INFO, "Trying to restore Sone from Freenet…");
-                                       coreListenerManager.fireRescuingSone(sone);
-                                       lockSone(sone);
-                                       long edition = sone.getLatestEdition();
-                                       while (!stopped && (edition >= 0) && preferences.isSoneRescueMode()) {
-                                               logger.log(Level.FINE, "Downloading edition " + edition + "…");
-                                               soneDownloader.fetchSone(sone, sone.getRequestUri().setKeyType("SSK").setDocName("Sone-" + edition));
-                                               --edition;
-                                       }
-                                       logger.log(Level.INFO, "Finished restoring Sone from Freenet, starting Inserter…");
-                                       saveSone(sone);
-                                       coreListenerManager.fireRescuedSone(sone);
-                                       soneInserter.start();
-                               }
-
-                       }, "Sone Downloader").start();
+                       soneInserter.start();
                        return sone;
                }
        }
@@ -878,13 +887,19 @@ public class Core implements IdentityListener, UpdateListener {
                try {
                        ownIdentity.addContext("Sone");
                } catch (WebOfTrustException wote1) {
-                       logger.log(Level.SEVERE, "Could not add “Sone” context to own identity: " + ownIdentity, wote1);
+                       logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity), wote1);
                        return null;
                }
                Sone sone = addLocalSone(ownIdentity);
                sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
-               sone.addFriend("nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
-               saveSone(sone);
+               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;
        }
 
@@ -901,29 +916,25 @@ public class Core implements IdentityListener, UpdateListener {
                        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());
+                                                       followSone(localSone, sone);
                                                }
                                        }
                                }
                        }
-                       remoteSones.put(identity.getId(), sone);
                        soneDownloader.addSone(sone);
-                       setSoneStatus(sone, SoneStatus.unknown);
                        soneDownloaders.execute(new Runnable() {
 
                                @Override
@@ -938,6 +949,95 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
+        * 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.
         *
@@ -950,7 +1050,7 @@ public class Core implements IdentityListener, UpdateListener {
         */
        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;
                }
                return target.getIdentity().getTrust((OwnIdentity) origin.getIdentity());
@@ -971,7 +1071,7 @@ public class Core implements IdentityListener, UpdateListener {
                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);
+                       logger.log(Level.WARNING, String.format("Could not set trust for Sone: %s", target), wote1);
                }
        }
 
@@ -988,7 +1088,7 @@ public class Core implements IdentityListener, UpdateListener {
                try {
                        ((OwnIdentity) origin.getIdentity()).removeTrust(target.getIdentity());
                } catch (WebOfTrustException wote1) {
-                       logger.log(Level.WARNING, "Could not remove trust for Sone: " + target, wote1);
+                       logger.log(Level.WARNING, String.format("Could not remove trust for Sone: %s", target), wote1);
                }
        }
 
@@ -1029,17 +1129,31 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * Updates the stores Sone with the given Sone.
+        * Updates the stored Sone with the given Sone.
         *
         * @param sone
         *            The updated Sone
         */
        public void updateSone(Sone sone) {
+               updateSone(sone, false);
+       }
+
+       /**
+        * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
+        * {@code true}, an older Sone than the current Sone can be given to restore
+        * an old state.
+        *
+        * @param sone
+        *            The Sone to update
+        * @param soneRescueMode
+        *            {@code true} if the stored Sone should be updated regardless
+        *            of the age of the given Sone
+        */
+       public void updateSone(Sone sone, boolean soneRescueMode) {
                if (hasSone(sone.getId())) {
-                       boolean soneRescueMode = isLocalSone(sone) && preferences.isSoneRescueMode();
                        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) {
@@ -1052,12 +1166,16 @@ public class Core implements IdentityListener, UpdateListener {
                                        }
                                }
                                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);
                                        }
@@ -1065,25 +1183,45 @@ public class Core implements IdentityListener, UpdateListener {
                        }
                        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);
                                        }
                                }
                        }
+                       synchronized (albums) {
+                               synchronized (images) {
+                                       for (Album album : storedSone.getAlbums()) {
+                                               albums.remove(album.getId());
+                                               for (Image image : album.getImages()) {
+                                                       images.remove(image.getId());
+                                               }
+                                       }
+                                       for (Album album : sone.getAlbums()) {
+                                               albums.put(album.getId(), album);
+                                               for (Image image : album.getImages()) {
+                                                       images.put(image.getId(), image);
+                                               }
+                                       }
+                               }
+                       }
                        synchronized (storedSone) {
                                if (!soneRescueMode || (sone.getTime() > storedSone.getTime())) {
                                        storedSone.setTime(sone.getTime());
@@ -1094,7 +1232,7 @@ public class Core implements IdentityListener, UpdateListener {
                                        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()) {
@@ -1103,11 +1241,15 @@ public class Core implements IdentityListener, UpdateListener {
                                        for (String likedReplyId : sone.getLikedReplyIds()) {
                                                storedSone.addLikedReplyId(likedReplyId);
                                        }
+                                       for (Album album : sone.getAlbums()) {
+                                               storedSone.addAlbum(album);
+                                       }
                                } else {
                                        storedSone.setPosts(sone.getPosts());
                                        storedSone.setReplies(sone.getReplies());
                                        storedSone.setLikePostIds(sone.getLikedPostIds());
                                        storedSone.setLikeReplyIds(sone.getLikedReplyIds());
+                                       storedSone.setAlbums(sone.getAlbums());
                                }
                                storedSone.setLatestEdition(sone.getLatestEdition());
                        }
@@ -1124,22 +1266,24 @@ public class Core implements IdentityListener, UpdateListener {
         */
        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());
-                       soneInserters.remove(sone).stop();
+                       SoneInserter soneInserter = soneInserters.remove(sone);
+                       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);
+                       logger.log(Level.WARNING, String.format("Could not remove context and properties from Sone: %s", sone), wote1);
                }
                try {
                        configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
@@ -1149,19 +1293,20 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
-        * 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);
-                               saveConfiguration();
                        }
+                       coreListenerManager.fireMarkSoneKnown(sone);
+                       touchConfiguration();
                }
        }
 
@@ -1174,12 +1319,17 @@ public class Core implements IdentityListener, UpdateListener {
         */
        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();
@@ -1191,7 +1341,7 @@ public class Core implements IdentityListener, UpdateListener {
                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));
@@ -1233,7 +1383,7 @@ public class Core implements IdentityListener, UpdateListener {
                }
 
                /* 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);
@@ -1280,8 +1430,78 @@ public class Core implements IdentityListener, UpdateListener {
                        friends.add(friendId);
                }
 
+               /* load albums. */
+               List<Album> topLevelAlbums = new ArrayList<Album>();
+               int albumCounter = 0;
+               while (true) {
+                       String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
+                       String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
+                       if (albumId == null) {
+                               break;
+                       }
+                       String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
+                       String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
+                       String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
+                       String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
+                       if ((albumTitle == null) || (albumDescription == null)) {
+                               logger.log(Level.WARNING, "Invalid album found, aborting load!");
+                               return;
+                       }
+                       Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId);
+                       if (albumParentId != null) {
+                               Album parentAlbum = getAlbum(albumParentId, false);
+                               if (parentAlbum == null) {
+                                       logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
+                                       return;
+                               }
+                               parentAlbum.addAlbum(album);
+                       } else {
+                               topLevelAlbums.add(album);
+                       }
+               }
+
+               /* load images. */
+               int imageCounter = 0;
+               while (true) {
+                       String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
+                       String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
+                       if (imageId == null) {
+                               break;
+                       }
+                       String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
+                       String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
+                       String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
+                       String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
+                       Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
+                       Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
+                       Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
+                       if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
+                               logger.log(Level.WARNING, "Invalid image found, aborting load!");
+                               return;
+                       }
+                       Album album = getAlbum(albumId, false);
+                       if (album == null) {
+                               logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
+                               return;
+                       }
+                       Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
+                       image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
+                       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) {
@@ -1291,168 +1511,72 @@ public class Core implements IdentityListener, UpdateListener {
                        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());
                        }
                }
        }
 
        /**
-        * Saves the given Sone. This will persist all local settings for the given
-        * Sone, such as the friends list and similar, private options.
+        * Creates a new post.
         *
         * @param sone
-        *            The Sone to save
+        *            The Sone that creates the post
+        * @param text
+        *            The text of the post
+        * @return The created post
         */
-       public synchronized void saveSone(Sone sone) {
-               if (!isLocalSone(sone)) {
-                       logger.log(Level.FINE, "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);
-                       return;
-               }
-
-               logger.log(Level.INFO, "Saving Sone: %s", sone);
-               try {
-                       ((OwnIdentity) sone.getIdentity()).setProperty("Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
+       public Post createPost(Sone sone, String text) {
+               return createPost(sone, System.currentTimeMillis(), text);
+       }
 
-                       /* save Sone into configuration. */
-                       String sonePrefix = "Sone/" + sone.getId();
-                       configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
-                       configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
+       /**
+        * Creates a new post.
+        *
+        * @param sone
+        *            The Sone that creates the post
+        * @param time
+        *            The time of the post
+        * @param text
+        *            The text of the post
+        * @return The created post
+        */
+       public Post createPost(Sone sone, long time, String text) {
+               return createPost(sone, null, time, text);
+       }
 
-                       /* save profile. */
-                       Profile profile = sone.getProfile();
-                       configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
-                       configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
-                       configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
-                       configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
-                       configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
-                       configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
-
-                       /* save profile fields. */
-                       int fieldCounter = 0;
-                       for (Field profileField : profile.getFields()) {
-                               String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
-                               configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
-                               configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
-                       }
-                       configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
-
-                       /* save posts. */
-                       int postCounter = 0;
-                       for (Post post : sone.getPosts()) {
-                               String postPrefix = sonePrefix + "/Posts/" + postCounter++;
-                               configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
-                               configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
-                               configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
-                               configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
-                       }
-                       configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
-
-                       /* save replies. */
-                       int replyCounter = 0;
-                       for (Reply reply : sone.getReplies()) {
-                               String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
-                               configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
-                               configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
-                               configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
-                               configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
-                       }
-                       configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
-
-                       /* save post likes. */
-                       int postLikeCounter = 0;
-                       for (String postId : sone.getLikedPostIds()) {
-                               configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
-                       }
-                       configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
-
-                       /* save reply likes. */
-                       int replyLikeCounter = 0;
-                       for (String replyId : sone.getLikedReplyIds()) {
-                               configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
-                       }
-                       configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
-
-                       /* save friends. */
-                       int friendCounter = 0;
-                       for (String friendId : sone.getFriends()) {
-                               configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
-                       }
-                       configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
-
-                       /* save options. */
-                       configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
-
-                       configuration.save();
-                       logger.log(Level.INFO, "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);
-               }
-       }
-
-       /**
-        * Creates a new post.
-        *
-        * @param sone
-        *            The Sone that creates the post
-        * @param text
-        *            The text of the post
-        * @return The created post
-        */
-       public Post createPost(Sone sone, String text) {
-               return createPost(sone, System.currentTimeMillis(), text);
-       }
-
-       /**
-        * Creates a new post.
-        *
-        * @param sone
-        *            The Sone that creates the post
-        * @param time
-        *            The time of the post
-        * @param text
-        *            The text of the post
-        * @return The created post
-        */
-       public Post createPost(Sone sone, long time, String text) {
-               return createPost(sone, null, time, text);
-       }
-
-       /**
-        * Creates a new post.
-        *
-        * @param sone
-        *            The Sone that creates the post
-        * @param recipient
-        *            The recipient Sone, or {@code null} if this post does not have
-        *            a recipient
-        * @param text
-        *            The text of the post
-        * @return The created post
-        */
-       public Post createPost(Sone sone, Sone recipient, String text) {
-               return createPost(sone, recipient, System.currentTimeMillis(), text);
-       }
+       /**
+        * Creates a new post.
+        *
+        * @param sone
+        *            The Sone that creates the post
+        * @param recipient
+        *            The recipient Sone, or {@code null} if this post does not have
+        *            a recipient
+        * @param text
+        *            The text of the post
+        * @return The created post
+        */
+       public Post createPost(Sone sone, Sone recipient, String text) {
+               return createPost(sone, recipient, System.currentTimeMillis(), text);
+       }
 
        /**
         * Creates a new post.
@@ -1470,22 +1594,29 @@ public class Core implements IdentityListener, UpdateListener {
         */
        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;
                }
-               Post post = new Post(sone, time, text);
+               final Post post = new Post(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);
-               saveSone(sone);
+               touchConfiguration();
+               localElementTicker.registerEvent(System.currentTimeMillis() + 10 * 1000, new Runnable() {
+
+                       /**
+                        * {@inheritDoc}
+                        */
+                       @Override
+                       public void run() {
+                               markPostKnown(post);
+                       }
+               }, "Mark " + post + " read.");
                return post;
        }
 
@@ -1497,7 +1628,7 @@ public class Core implements IdentityListener, UpdateListener {
         */
        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);
@@ -1505,28 +1636,28 @@ public class Core implements IdentityListener, UpdateListener {
                        posts.remove(post.getId());
                }
                coreListenerManager.firePostRemoved(post);
-               synchronized (newPosts) {
-                       markPostKnown(post);
-                       knownPosts.remove(post.getId());
-               }
-               saveSone(post.getSone());
+               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);
-                               saveConfiguration();
+               post.setKnown(true);
+               synchronized (knownPosts) {
+                       coreListenerManager.fireMarkPostKnown(post);
+                       if (knownPosts.add(post.getId())) {
+                               touchConfiguration();
                        }
                }
+               for (PostReply reply : getReplies(post)) {
+                       markReplyKnown(reply);
+               }
        }
 
        /**
@@ -1584,7 +1715,7 @@ public class Core implements IdentityListener, UpdateListener {
         *            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);
        }
 
@@ -1601,21 +1732,30 @@ public class Core implements IdentityListener, UpdateListener {
         *            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;
                }
-               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);
-               saveSone(sone);
+               touchConfiguration();
+               localElementTicker.registerEvent(System.currentTimeMillis() + 10 * 1000, new Runnable() {
+
+                       /**
+                        * {@inheritDoc}
+                        */
+                       @Override
+                       public void run() {
+                               markReplyKnown(reply);
+                       }
+               }, "Mark " + reply + " read.");
                return reply;
        }
 
@@ -1625,69 +1765,390 @@ public class Core implements IdentityListener, UpdateListener {
         * @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());
                }
                sone.removeReply(reply);
-               saveSone(sone);
+               touchConfiguration();
        }
 
        /**
-        * 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);
-                               saveConfiguration();
+       public void markReplyKnown(PostReply reply) {
+               reply.setKnown(true);
+               synchronized (knownReplies) {
+                       coreListenerManager.fireMarkReplyKnown(reply);
+                       if (knownReplies.add(reply.getId())) {
+                               touchConfiguration();
                        }
                }
        }
 
        /**
+        * Creates a new top-level album for the given Sone.
+        *
+        * @param sone
+        *            The Sone to create the album for
+        * @return The new album
+        */
+       public Album createAlbum(Sone sone) {
+               return createAlbum(sone, null);
+       }
+
+       /**
+        * Creates a new album for the given Sone.
+        *
+        * @param sone
+        *            The Sone to create the album for
+        * @param parent
+        *            The parent of the album (may be {@code null} to create a
+        *            top-level album)
+        * @return The new album
+        */
+       public Album createAlbum(Sone sone, Album parent) {
+               Album album = new Album();
+               synchronized (albums) {
+                       albums.put(album.getId(), album);
+               }
+               album.setSone(sone);
+               if (parent != null) {
+                       parent.addAlbum(album);
+               } else {
+                       sone.addAlbum(album);
+               }
+               return album;
+       }
+
+       /**
+        * Deletes the given album. The owner of the album has to be a local Sone,
+        * and the album has to be {@link Album#isEmpty() empty} to be deleted.
+        *
+        * @param album
+        *            The album to remove
+        */
+       public void deleteAlbum(Album album) {
+               Validation.begin().isNotNull("Album", album).check().is("Local Sone", isLocalSone(album.getSone())).check();
+               if (!album.isEmpty()) {
+                       return;
+               }
+               if (album.getParent() == null) {
+                       album.getSone().removeAlbum(album);
+               } else {
+                       album.getParent().removeAlbum(album);
+               }
+               synchronized (albums) {
+                       albums.remove(album.getId());
+               }
+               saveSone(album.getSone());
+       }
+
+       /**
+        * Creates a new image.
+        *
+        * @param sone
+        *            The Sone creating the image
+        * @param album
+        *            The album the image will be inserted into
+        * @param temporaryImage
+        *            The temporary image to create the image from
+        * @return The newly created image
+        */
+       public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
+               Validation.begin().isNotNull("Sone", sone).isNotNull("Album", album).isNotNull("Temporary Image", temporaryImage).check().is("Local Sone", isLocalSone(sone)).check().isEqual("Owner and Album Owner", sone, album.getSone()).check();
+               Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
+               album.addImage(image);
+               synchronized (images) {
+                       images.put(image.getId(), image);
+               }
+               imageInserter.insertImage(temporaryImage, image);
+               return image;
+       }
+
+       /**
+        * Deletes the given image. This method will also delete a matching
+        * temporary image.
+        *
+        * @see #deleteTemporaryImage(TemporaryImage)
+        * @param image
+        *            The image to delete
+        */
+       public void deleteImage(Image image) {
+               Validation.begin().isNotNull("Image", image).check().is("Local Sone", isLocalSone(image.getSone())).check();
+               deleteTemporaryImage(image.getId());
+               image.getAlbum().removeImage(image);
+               synchronized (images) {
+                       images.remove(image.getId());
+               }
+               saveSone(image.getSone());
+       }
+
+       /**
+        * Creates a new temporary image.
+        *
+        * @param mimeType
+        *            The MIME type of the temporary image
+        * @param imageData
+        *            The encoded data of the image
+        * @return The temporary image
+        */
+       public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
+               TemporaryImage temporaryImage = new TemporaryImage();
+               temporaryImage.setMimeType(mimeType).setImageData(imageData);
+               synchronized (temporaryImages) {
+                       temporaryImages.put(temporaryImage.getId(), temporaryImage);
+               }
+               return temporaryImage;
+       }
+
+       /**
+        * Deletes the given temporary image.
+        *
+        * @param temporaryImage
+        *            The temporary image to delete
+        */
+       public void deleteTemporaryImage(TemporaryImage temporaryImage) {
+               Validation.begin().isNotNull("Temporary Image", temporaryImage).check();
+               deleteTemporaryImage(temporaryImage.getId());
+       }
+
+       /**
+        * Deletes the temporary image with the given ID.
+        *
+        * @param imageId
+        *            The ID of the temporary image to delete
+        */
+       public void deleteTemporaryImage(String imageId) {
+               Validation.begin().isNotNull("Temporary Image ID", imageId).check();
+               synchronized (temporaryImages) {
+                       temporaryImages.remove(imageId);
+               }
+               Image image = getImage(imageId, false);
+               if (image != null) {
+                       imageInserter.cancelImageInsert(image);
+               }
+       }
+
+       /**
+        * Notifies the core that the configuration, either of the core or of a
+        * single local Sone, has changed, and that the configuration should be
+        * saved.
+        */
+       public void touchConfiguration() {
+               lastConfigurationUpdate = System.currentTimeMillis();
+       }
+
+       //
+       // SERVICE METHODS
+       //
+
+       /**
         * Starts the core.
         */
-       public void start() {
+       @Override
+       public void serviceStart() {
                loadConfiguration();
                updateChecker.addUpdateListener(this);
                updateChecker.start();
        }
 
        /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void serviceRun() {
+               long lastSaved = System.currentTimeMillis();
+               while (!shouldStop()) {
+                       sleep(1000);
+                       long now = System.currentTimeMillis();
+                       if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
+                               for (Sone localSone : getLocalSones()) {
+                                       saveSone(localSone);
+                               }
+                               saveConfiguration();
+                               lastSaved = now;
+                       }
+               }
+       }
+
+       /**
         * Stops the core.
         */
-       public void stop() {
+       @Override
+       public void serviceStop() {
                synchronized (localSones) {
                        for (SoneInserter soneInserter : soneInserters.values()) {
+                               soneInserter.removeSoneInsertListener(this);
                                soneInserter.stop();
                        }
                }
                updateChecker.stop();
                updateChecker.removeUpdateListener(this);
                soneDownloader.stop();
-               saveConfiguration();
-               stopped = true;
+       }
+
+       //
+       // PRIVATE METHODS
+       //
+
+       /**
+        * Saves the given Sone. This will persist all local settings for the given
+        * Sone, such as the friends list and similar, private options.
+        *
+        * @param sone
+        *            The Sone to save
+        */
+       private synchronized void saveSone(Sone sone) {
+               if (!isLocalSone(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, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
+                       return;
+               }
+
+               logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
+               try {
+                       /* save Sone into configuration. */
+                       String sonePrefix = "Sone/" + sone.getId();
+                       configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
+                       configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
+
+                       /* save profile. */
+                       Profile profile = sone.getProfile();
+                       configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
+                       configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
+                       configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
+                       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;
+                       for (Field profileField : profile.getFields()) {
+                               String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
+                               configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
+                               configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
+                       }
+                       configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
+
+                       /* save posts. */
+                       int postCounter = 0;
+                       for (Post post : sone.getPosts()) {
+                               String postPrefix = sonePrefix + "/Posts/" + postCounter++;
+                               configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
+                               configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
+                               configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
+                               configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
+                       }
+                       configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
+
+                       /* save replies. */
+                       int replyCounter = 0;
+                       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());
+                               configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
+                               configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
+                       }
+                       configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
+
+                       /* save post likes. */
+                       int postLikeCounter = 0;
+                       for (String postId : sone.getLikedPostIds()) {
+                               configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
+                       }
+                       configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
+
+                       /* save reply likes. */
+                       int replyLikeCounter = 0;
+                       for (String replyId : sone.getLikedReplyIds()) {
+                               configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
+                       }
+                       configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
+
+                       /* save friends. */
+                       int friendCounter = 0;
+                       for (String friendId : sone.getFriends()) {
+                               configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
+                       }
+                       configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
+
+                       /* save albums. first, collect in a flat structure, top-level first. */
+                       List<Album> albums = sone.getAllAlbums();
+
+                       int albumCounter = 0;
+                       for (Album album : albums) {
+                               String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
+                               configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
+                               configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
+                               configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
+                               configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
+                               configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
+                       }
+                       configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
+
+                       /* save images. */
+                       int imageCounter = 0;
+                       for (Album album : albums) {
+                               for (Image image : album.getImages()) {
+                                       if (!image.isInserted()) {
+                                               continue;
+                                       }
+                                       String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
+                                       configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
+                                       configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
+                                       configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
+                                       configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
+                                       configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
+                                       configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
+                                       configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
+                                       configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
+                               }
+                       }
+                       configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
+
+                       /* 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();
+
+                       ((OwnIdentity) sone.getIdentity()).setProperty("Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
+
+                       logger.log(Level.INFO, String.format("Sone %s saved.", sone));
+               } catch (ConfigurationException ce1) {
+                       logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
+               } catch (WebOfTrustException wote1) {
+                       logger.log(Level.WARNING, String.format("Could not set WoT property for Sone: %s", sone), wote1);
+               }
        }
 
        /**
         * Saves the current options.
         */
-       public void saveConfiguration() {
+       private void saveConfiguration() {
                synchronized (configuration) {
                        if (storingConfiguration) {
                                logger.log(Level.FINE, "Already storing configuration…");
@@ -1701,26 +2162,41 @@ public class Core implements IdentityListener, UpdateListener {
                        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/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
+                       configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
                        configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
                        configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
                        configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
                        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);
                                }
@@ -1729,7 +2205,7 @@ public class Core implements IdentityListener, UpdateListener {
 
                        /* save known replies. */
                        int replyCounter = 0;
-                       synchronized (newReplies) {
+                       synchronized (knownReplies) {
                                for (String knownReplyId : knownReplies) {
                                        configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
                                }
@@ -1757,17 +2233,13 @@ public class Core implements IdentityListener, UpdateListener {
                }
        }
 
-       //
-       // PRIVATE METHODS
-       //
-
        /**
         * Loads the configuration.
         */
        @SuppressWarnings("unchecked")
        private void loadConfiguration() {
                /* create options. */
-               options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
+               options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangeValidator(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
 
                        @Override
                        public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
@@ -1775,11 +2247,30 @@ public class Core implements IdentityListener, UpdateListener {
                        }
 
                }));
-               options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10));
+               options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, 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));
-               options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75));
-               options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25));
+               options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangeValidator(0, 100)));
+               options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangeValidator(-100, 100)));
                options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
+               options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
+
+                       @Override
+                       @SuppressWarnings("synthetic-access")
+                       public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
+                               fcpInterface.setActive(newValue);
+                       }
+               }));
+               options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
+
+                       @Override
+                       @SuppressWarnings("synthetic-access")
+                       public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
+                               fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
+                       }
+
+               }));
                options.addBooleanOption("SoneRescueMode", new DefaultOption<Boolean>(false));
                options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
                options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
@@ -1795,12 +2286,16 @@ public class Core implements IdentityListener, UpdateListener {
                        return;
                }
 
-               options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
-               options.getIntegerOption("PostsPerPage").set(configuration.getIntValue("Option/PostsPerPage").getValue(null));
+               loadConfigurationValue("InsertionDelay");
+               loadConfigurationValue("PostsPerPage");
+               loadConfigurationValue("CharactersPerPost");
+               loadConfigurationValue("PostCutOffLength");
                options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
-               options.getIntegerOption("PositiveTrust").set(configuration.getIntValue("Option/PositiveTrust").getValue(null));
-               options.getIntegerOption("NegativeTrust").set(configuration.getIntValue("Option/NegativeTrust").getValue(null));
+               loadConfigurationValue("PositiveTrust");
+               loadConfigurationValue("NegativeTrust");
                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. */
@@ -1810,11 +2305,30 @@ public class Core implements IdentityListener, UpdateListener {
                        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) {
@@ -1822,7 +2336,7 @@ public class Core implements IdentityListener, UpdateListener {
                        if (knownPostId == null) {
                                break;
                        }
-                       synchronized (newPosts) {
+                       synchronized (knownPosts) {
                                knownPosts.add(knownPostId);
                        }
                }
@@ -1834,7 +2348,7 @@ public class Core implements IdentityListener, UpdateListener {
                        if (knownReplyId == null) {
                                break;
                        }
-                       synchronized (newReplies) {
+                       synchronized (knownReplies) {
                                knownReplies.add(knownReplyId);
                        }
                }
@@ -1854,6 +2368,21 @@ public class Core implements IdentityListener, UpdateListener {
        }
 
        /**
+        * Loads an {@link Integer} configuration value for the option with the
+        * given name, logging validation failures.
+        *
+        * @param optionName
+        *            The name of the option to load
+        */
+       private void loadConfigurationValue(String optionName) {
+               try {
+                       options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
+               } catch (IllegalArgumentException iae1) {
+                       logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
+               }
+       }
+
+       /**
         * Generate a Sone URI from the given URI and latest edition.
         *
         * @param uriString
@@ -1865,7 +2394,7 @@ public class Core implements IdentityListener, UpdateListener {
                        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;
                }
        }
@@ -1879,7 +2408,7 @@ public class Core implements IdentityListener, UpdateListener {
         */
        @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);
@@ -1891,7 +2420,7 @@ public class Core implements IdentityListener, UpdateListener {
         */
        @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);
        }
 
@@ -1900,7 +2429,7 @@ public class Core implements IdentityListener, UpdateListener {
         */
        @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);
        }
@@ -1915,7 +2444,7 @@ public class Core implements IdentityListener, UpdateListener {
                        @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);
@@ -1949,19 +2478,17 @@ public class Core implements IdentityListener, UpdateListener {
                        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);
                                }
                        }
@@ -1969,9 +2496,7 @@ public class Core implements IdentityListener, UpdateListener {
                synchronized (remoteSones) {
                        remoteSones.remove(identity.getId());
                }
-               synchronized (newSones) {
-                       newSones.remove(identity.getId());
-               }
+               coreListenerManager.fireSoneRemoved(sone);
        }
 
        //
@@ -1986,6 +2511,77 @@ public class Core implements IdentityListener, UpdateListener {
                coreListenerManager.fireUpdateFound(version, releaseTime, latestEdition);
        }
 
+       //
+       // INTERFACE ImageInsertListener
+       //
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void insertStarted(Sone sone) {
+               coreListenerManager.fireSoneInserting(sone);
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void insertFinished(Sone sone, long insertDuration) {
+               coreListenerManager.fireSoneInserted(sone, insertDuration);
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void insertAborted(Sone sone, Throwable cause) {
+               coreListenerManager.fireSoneInsertAborted(sone, cause);
+       }
+
+       //
+       // SONEINSERTLISTENER METHODS
+       //
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void imageInsertStarted(Image image) {
+               logger.log(Level.WARNING, String.format("Image insert started for %s...", image));
+               coreListenerManager.fireImageInsertStarted(image);
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void imageInsertAborted(Image image) {
+               logger.log(Level.WARNING, String.format("Image insert aborted for %s.", image));
+               coreListenerManager.fireImageInsertAborted(image);
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void imageInsertFinished(Image image, FreenetURI 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());
+               coreListenerManager.fireImageInsertFinished(image);
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void imageInsertFailed(Image image, Throwable cause) {
+               logger.log(Level.WARNING, String.format("Image insert failed for %s." + image), cause);
+               coreListenerManager.fireImageInsertFailed(image, cause);
+       }
+
        /**
         * Convenience interface for external classes that want to access the core’s
         * configuration.
@@ -2021,8 +2617,8 @@ public class Core implements IdentityListener, UpdateListener {
                 *
                 * @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);
@@ -2075,6 +2671,74 @@ public class Core implements IdentityListener, UpdateListener {
                }
 
                /**
+                * Returns the number of characters per post, or <code>-1</code> if the
+                * posts should not be cut off.
+                *
+                * @return The numbers of characters per post
+                */
+               public int getCharactersPerPost() {
+                       return options.getIntegerOption("CharactersPerPost").get();
+               }
+
+               /**
+                * Validates the number of characters per post.
+                *
+                * @param charactersPerPost
+                *            The number of characters per post
+                * @return {@code true} if the number of characters per post was valid,
+                *         {@code false} otherwise
+                */
+               public boolean validateCharactersPerPost(Integer charactersPerPost) {
+                       return options.getIntegerOption("CharactersPerPost").validate(charactersPerPost);
+               }
+
+               /**
+                * Sets the number of characters per post.
+                *
+                * @param charactersPerPost
+                *            The number of characters per post, or <code>-1</code> to
+                *            not cut off the posts
+                * @return This preferences objects
+                */
+               public Preferences setCharactersPerPost(Integer charactersPerPost) {
+                       options.getIntegerOption("CharactersPerPost").set(charactersPerPost);
+                       return this;
+               }
+
+               /**
+                * Returns the number of characters the shortened post should have.
+                *
+                * @return The number of characters of the snippet
+                */
+               public int getPostCutOffLength() {
+                       return options.getIntegerOption("PostCutOffLength").get();
+               }
+
+               /**
+                * Validates the number of characters after which to cut off the post.
+                *
+                * @param postCutOffLength
+                *            The number of characters of the snippet
+                * @return {@code true} if the number of characters of the snippet is
+                *         valid, {@code false} otherwise
+                */
+               public boolean validatePostCutOffLength(Integer postCutOffLength) {
+                       return options.getIntegerOption("PostCutOffLength").validate(postCutOffLength);
+               }
+
+               /**
+                * Sets the number of characters the shortened post should have.
+                *
+                * @param postCutOffLength
+                *            The number of characters of the snippet
+                * @return This preferences
+                */
+               public Preferences setPostCutOffLength(Integer postCutOffLength) {
+                       options.getIntegerOption("PostCutOffLength").set(postCutOffLength);
+                       return this;
+               }
+
+               /**
                 * Returns whether Sone requires full access to be even visible.
                 *
                 * @return {@code true} if Sone requires full access, {@code false}
@@ -2187,25 +2851,53 @@ public class Core implements IdentityListener, UpdateListener {
                }
 
                /**
-                * Returns whether the rescue mode is active.
+                * Returns whether the {@link FcpInterface FCP interface} is currently
+                * active.
                 *
-                * @return {@code true} if the rescue mode is active, {@code false}
-                *         otherwise
+                * @see FcpInterface#setActive(boolean)
+                * @return {@code true} if the FCP interface is currently active,
+                *         {@code false} otherwise
                 */
-               public boolean isSoneRescueMode() {
-                       return options.getBooleanOption("SoneRescueMode").get();
+               public boolean isFcpInterfaceActive() {
+                       return options.getBooleanOption("ActivateFcpInterface").get();
                }
 
                /**
-                * Sets whether the rescue mode is active.
+                * Sets whether the {@link FcpInterface FCP interface} is currently
+                * active.
                 *
-                * @param soneRescueMode
-                *            {@code true} if the rescue mode is active, {@code false}
-                *            otherwise
+                * @see FcpInterface#setActive(boolean)
+                * @param fcpInterfaceActive
+                *            {@code true} to activate the FCP interface, {@code false}
+                *            to deactivate the FCP interface
+                * @return This preferences object
+                */
+               public Preferences setFcpInterfaceActive(boolean fcpInterfaceActive) {
+                       options.getBooleanOption("ActivateFcpInterface").set(fcpInterfaceActive);
+                       return this;
+               }
+
+               /**
+                * Returns the action level for which full access to the FCP interface
+                * is required.
+                *
+                * @return The action level for which full access to the FCP interface
+                *         is required
+                */
+               public FullAccessRequired getFcpFullAccessRequired() {
+                       return FullAccessRequired.values()[options.getIntegerOption("FcpFullAccessRequired").get()];
+               }
+
+               /**
+                * Sets the action level for which full access to the FCP interface is
+                * required
+                *
+                * @param fcpFullAccessRequired
+                *            The action level
                 * @return This preferences
                 */
-               public Preferences setSoneRescueMode(Boolean soneRescueMode) {
-                       options.getBooleanOption("SoneRescueMode").set(soneRescueMode);
+               public Preferences setFcpFullAccessRequired(FullAccessRequired fcpFullAccessRequired) {
+                       options.getIntegerOption("FcpFullAccessRequired").set((fcpFullAccessRequired != null) ? fcpFullAccessRequired.ordinal() : null);
                        return this;
                }