src/main/java/net/pterodactylus/sone/core/Core.java

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.core;
  19
  20 import static com.google.common.base.Preconditions.checkArgument;
  21 import static com.google.common.base.Preconditions.checkNotNull;
  22 import static com.google.common.base.Predicates.not;
  23 import static net.pterodactylus.sone.data.Sone.LOCAL_SONE_FILTER;
  24
  25 import java.net.MalformedURLException;
  26 import java.util.ArrayList;
  27 import java.util.Collection;
  28 import java.util.HashMap;
  29 import java.util.HashSet;
  30 import java.util.List;
  31 import java.util.Map;
  32 import java.util.Map.Entry;
  33 import java.util.Set;
  34 import java.util.concurrent.ExecutorService;
  35 import java.util.concurrent.Executors;
  36 import java.util.concurrent.ScheduledExecutorService;
  37 import java.util.concurrent.TimeUnit;
  38 import java.util.logging.Level;
  39 import java.util.logging.Logger;
  40
  41 import net.pterodactylus.sone.core.Options.DefaultOption;
  42 import net.pterodactylus.sone.core.SoneInserter.SetInsertionDelay;
  43 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  44 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  45 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  46 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  47 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  48 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  49 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  50 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  51 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  52 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  53 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  54 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  55 import net.pterodactylus.sone.data.Album;
  56 import net.pterodactylus.sone.data.Client;
  57 import net.pterodactylus.sone.data.Image;
  58 import net.pterodactylus.sone.data.Post;
  59 import net.pterodactylus.sone.data.PostReply;
  60 import net.pterodactylus.sone.data.Profile;
  61 import net.pterodactylus.sone.data.Profile.Field;
  62 import net.pterodactylus.sone.data.Reply;
  63 import net.pterodactylus.sone.data.Sone;
  64 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
  65 import net.pterodactylus.sone.data.Sone.SoneStatus;
  66 import net.pterodactylus.sone.data.SoneImpl;
  67 import net.pterodactylus.sone.data.TemporaryImage;
  68 import net.pterodactylus.sone.database.Database;
  69 import net.pterodactylus.sone.database.DatabaseException;
  70 import net.pterodactylus.sone.database.PostBuilder;
  71 import net.pterodactylus.sone.database.PostProvider;
  72 import net.pterodactylus.sone.database.PostReplyBuilder;
  73 import net.pterodactylus.sone.database.PostReplyProvider;
  74 import net.pterodactylus.sone.database.SoneProvider;
  75 import net.pterodactylus.sone.fcp.FcpInterface;
  76 import net.pterodactylus.sone.freenet.wot.Identity;
  77 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  78 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  83 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  84 import net.pterodactylus.sone.main.SonePlugin;
  85 import net.pterodactylus.sone.utils.IntegerRangePredicate;
  86 import net.pterodactylus.util.config.Configuration;
  87 import net.pterodactylus.util.config.ConfigurationException;
  88 import net.pterodactylus.util.logging.Logging;
  89 import net.pterodactylus.util.number.Numbers;
  90 import net.pterodactylus.util.service.AbstractService;
  91 import net.pterodactylus.util.thread.NamedThreadFactory;
  92
  93 import com.google.common.base.Optional;
  94 import com.google.common.base.Predicates;
  95 import com.google.common.collect.FluentIterable;
  96 import com.google.common.collect.HashMultimap;
  97 import com.google.common.collect.ImmutableSet;
  98 import com.google.common.collect.Multimap;
  99 import com.google.common.collect.Multimaps;
 100 import com.google.common.eventbus.EventBus;
 101 import com.google.common.eventbus.Subscribe;
 102 import com.google.inject.Inject;
 103
 104 import freenet.keys.FreenetURI;
 105
 106 /**
 107  * The Sone core.
 108  *
 109  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 110  */
 111 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 112
 113         /** The logger. */
 114         private static final Logger logger = Logging.getLogger(Core.class);
 115
 116         /** The start time. */
 117         private final long startupTime = System.currentTimeMillis();
 118
 119         /** The options. */
 120         private final Options options = new Options();
 121
 122         /** The preferences. */
 123         private final Preferences preferences = new Preferences(options);
 124
 125         /** The event bus. */
 126         private final EventBus eventBus;
 127
 128         /** The configuration. */
 129         private final Configuration configuration;
 130
 131         /** Whether we’re currently saving the configuration. */
 132         private boolean storingConfiguration = false;
 133
 134         /** The identity manager. */
 135         private final IdentityManager identityManager;
 136
 137         /** Interface to freenet. */
 138         private final FreenetInterface freenetInterface;
 139
 140         /** The Sone downloader. */
 141         private final SoneDownloader soneDownloader;
 142
 143         /** The image inserter. */
 144         private final ImageInserter imageInserter;
 145
 146         /** Sone downloader thread-pool. */
 147         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 148
 149         /** The update checker. */
 150         private final UpdateChecker updateChecker;
 151
 152         /** The trust updater. */
 153         private final WebOfTrustUpdater webOfTrustUpdater;
 154
 155         /** The FCP interface. */
 156         private volatile FcpInterface fcpInterface;
 157
 158         /** The times Sones were followed. */
 159         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 160
 161         /** Locked local Sones. */
 162         /* synchronize on itself. */
 163         private final Set<Sone> lockedSones = new HashSet<Sone>();
 164
 165         /** Sone inserters. */
 166         /* synchronize access on this on sones. */
 167         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 168
 169         /** Sone rescuers. */
 170         /* synchronize access on this on sones. */
 171         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 172
 173         /** All Sones. */
 174         /* synchronize access on this on itself. */
 175         private final Map<String, Sone> sones = new HashMap<String, Sone>();
 176
 177         /** All known Sones. */
 178         private final Set<String> knownSones = new HashSet<String>();
 179
 180         /** The post database. */
 181         private final Database database;
 182
 183         /** All bookmarked posts. */
 184         /* synchronize access on itself. */
 185         private final Set<String> bookmarkedPosts = new HashSet<String>();
 186
 187         /** Trusted identities, sorted by own identities. */
 188         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 189
 190         /** All temporary images. */
 191         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 192
 193         /** Ticker for threads that mark own elements as known. */
 194         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 195
 196         /** The time the configuration was last touched. */
 197         private volatile long lastConfigurationUpdate;
 198
 199         /**
 200          * Creates a new core.
 201          *
 202          * @param configuration
 203          *            The configuration of the core
 204          * @param freenetInterface
 205          *            The freenet interface
 206          * @param identityManager
 207          *            The identity manager
 208          * @param webOfTrustUpdater
 209          *            The WebOfTrust updater
 210          * @param eventBus
 211          *            The event bus
 212          * @param database
 213          *            The database
 214          */
 215         @Inject
 216         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 217                 super("Sone Core");
 218                 this.configuration = configuration;
 219                 this.freenetInterface = freenetInterface;
 220                 this.identityManager = identityManager;
 221                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 222                 this.imageInserter = new ImageInserter(freenetInterface);
 223                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 224                 this.webOfTrustUpdater = webOfTrustUpdater;
 225                 this.eventBus = eventBus;
 226                 this.database = database;
 227         }
 228
 229         //
 230         // ACCESSORS
 231         //
 232
 233         /**
 234          * Returns the time Sone was started.
 235          *
 236          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 237          */
 238         public long getStartupTime() {
 239                 return startupTime;
 240         }
 241
 242         /**
 243          * Returns the options used by the core.
 244          *
 245          * @return The options of the core
 246          */
 247         public Preferences getPreferences() {
 248                 return preferences;
 249         }
 250
 251         /**
 252          * Returns the identity manager used by the core.
 253          *
 254          * @return The identity manager
 255          */
 256         public IdentityManager getIdentityManager() {
 257                 return identityManager;
 258         }
 259
 260         /**
 261          * Returns the update checker.
 262          *
 263          * @return The update checker
 264          */
 265         public UpdateChecker getUpdateChecker() {
 266                 return updateChecker;
 267         }
 268
 269         /**
 270          * Sets the FCP interface to use.
 271          *
 272          * @param fcpInterface
 273          *            The FCP interface to use
 274          */
 275         public void setFcpInterface(FcpInterface fcpInterface) {
 276                 this.fcpInterface = fcpInterface;
 277         }
 278
 279         /**
 280          * Returns the Sone rescuer for the given local Sone.
 281          *
 282          * @param sone
 283          *            The local Sone to get the rescuer for
 284          * @return The Sone rescuer for the given Sone
 285          */
 286         public SoneRescuer getSoneRescuer(Sone sone) {
 287                 checkNotNull(sone, "sone must not be null");
 288                 checkArgument(sone.isLocal(), "sone must be local");
 289                 synchronized (sones) {
 290                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 291                         if (soneRescuer == null) {
 292                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 293                                 soneRescuers.put(sone, soneRescuer);
 294                                 soneRescuer.start();
 295                         }
 296                         return soneRescuer;
 297                 }
 298         }
 299
 300         /**
 301          * Returns whether the given Sone is currently locked.
 302          *
 303          * @param sone
 304          *            The sone to check
 305          * @return {@code true} if the Sone is locked, {@code false} if it is not
 306          */
 307         public boolean isLocked(Sone sone) {
 308                 synchronized (lockedSones) {
 309                         return lockedSones.contains(sone);
 310                 }
 311         }
 312
 313         /**
 314          * {@inheritDocs}
 315          */
 316         @Override
 317         public Collection<Sone> getSones() {
 318                 synchronized (sones) {
 319                         return ImmutableSet.copyOf(sones.values());
 320                 }
 321         }
 322
 323         /**
 324          * Returns the Sone with the given ID, regardless whether it’s local or
 325          * remote.
 326          *
 327          * @param id
 328          *            The ID of the Sone to get
 329          * @return The Sone with the given ID, or {@code null} if there is no such
 330          *         Sone
 331          */
 332         @Override
 333         public Optional<Sone> getSone(String id) {
 334                 synchronized (sones) {
 335                         return Optional.fromNullable(sones.get(id));
 336                 }
 337         }
 338
 339         /**
 340          * {@inheritDocs}
 341          */
 342         @Override
 343         public Collection<Sone> getLocalSones() {
 344                 synchronized (sones) {
 345                         return FluentIterable.from(sones.values()).filter(LOCAL_SONE_FILTER).toSet();
 346                 }
 347         }
 348
 349         /**
 350          * Returns the local Sone with the given ID, optionally creating a new Sone.
 351          *
 352          * @param id
 353          *            The ID of the Sone
 354          * @param create
 355          *            {@code true} to create a new Sone if none exists,
 356          *            {@code false} to return null if none exists
 357          * @return The Sone with the given ID, or {@code null}
 358          */
 359         public Sone getLocalSone(String id, boolean create) {
 360                 synchronized (sones) {
 361                         Sone sone = sones.get(id);
 362                         if ((sone == null) && create) {
 363                                 sone = new SoneImpl(id, true);
 364                                 sones.put(id, sone);
 365                         }
 366                         if ((sone != null) && !sone.isLocal()) {
 367                                 sone = new SoneImpl(id, true);
 368                                 sones.put(id, sone);
 369                         }
 370                         return sone;
 371                 }
 372         }
 373
 374         /**
 375          * {@inheritDocs}
 376          */
 377         @Override
 378         public Collection<Sone> getRemoteSones() {
 379                 synchronized (sones) {
 380                         return FluentIterable.from(sones.values()).filter(not(LOCAL_SONE_FILTER)).toSet();
 381                 }
 382         }
 383
 384         /**
 385          * Returns the remote Sone with the given ID.
 386          *
 387          * @param id
 388          *            The ID of the remote Sone to get
 389          * @param create
 390          *            {@code true} to always create a Sone, {@code false} to return
 391          *            {@code null} if no Sone with the given ID exists
 392          * @return The Sone with the given ID
 393          */
 394         public Sone getRemoteSone(String id, boolean create) {
 395                 synchronized (sones) {
 396                         Sone sone = sones.get(id);
 397                         if ((sone == null) && create && (id != null) && (id.length() == 43)) {
 398                                 sone = new SoneImpl(id, false);
 399                                 sones.put(id, sone);
 400                         }
 401                         return sone;
 402                 }
 403         }
 404
 405         /**
 406          * Returns whether the given Sone has been modified.
 407          *
 408          * @param sone
 409          *            The Sone to check for modifications
 410          * @return {@code true} if a modification has been detected in the Sone,
 411          *         {@code false} otherwise
 412          */
 413         public boolean isModifiedSone(Sone sone) {
 414                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 415         }
 416
 417         /**
 418          * Returns the time when the given was first followed by any local Sone.
 419          *
 420          * @param sone
 421          *            The Sone to get the time for
 422          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 423          *         been followed, or {@link Long#MAX_VALUE}
 424          */
 425         public long getSoneFollowingTime(Sone sone) {
 426                 synchronized (soneFollowingTimes) {
 427                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 428                 }
 429         }
 430
 431         /**
 432          * Returns whether the target Sone is trusted by the origin Sone.
 433          *
 434          * @param origin
 435          *            The origin Sone
 436          * @param target
 437          *            The target Sone
 438          * @return {@code true} if the target Sone is trusted by the origin Sone
 439          */
 440         public boolean isSoneTrusted(Sone origin, Sone target) {
 441                 checkNotNull(origin, "origin must not be null");
 442                 checkNotNull(target, "target must not be null");
 443                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin’s identity must be an OwnIdentity");
 444                 return trustedIdentities.containsEntry(origin.getIdentity(), target.getIdentity());
 445         }
 446
 447         /**
 448          * Returns a post builder.
 449          *
 450          * @return A new post builder
 451          */
 452         public PostBuilder postBuilder() {
 453                 return database.newPostBuilder();
 454         }
 455
 456         /**
 457          * {@inheritDoc}
 458          */
 459         @Override
 460         public Optional<Post> getPost(String postId) {
 461                 return database.getPost(postId);
 462         }
 463
 464         /**
 465          * {@inheritDocs}
 466          */
 467         @Override
 468         public Collection<Post> getPosts(String soneId) {
 469                 return database.getPosts(soneId);
 470         }
 471
 472         /**
 473          * {@inheritDoc}
 474          */
 475         @Override
 476         public Collection<Post> getDirectedPosts(final String recipientId) {
 477                 checkNotNull(recipientId, "recipient must not be null");
 478                 return database.getDirectedPosts(recipientId);
 479         }
 480
 481         /**
 482          * Returns a post reply builder.
 483          *
 484          * @return A new post reply builder
 485          */
 486         public PostReplyBuilder postReplyBuilder() {
 487                 return database.newPostReplyBuilder();
 488         }
 489
 490         /**
 491          * {@inheritDoc}
 492          */
 493         @Override
 494         public Optional<PostReply> getPostReply(String replyId) {
 495                 return database.getPostReply(replyId);
 496         }
 497
 498         /**
 499          * {@inheritDoc}
 500          */
 501         @Override
 502         public List<PostReply> getReplies(final String postId) {
 503                 return database.getReplies(postId);
 504         }
 505
 506         /**
 507          * Returns all Sones that have liked the given post.
 508          *
 509          * @param post
 510          *            The post to get the liking Sones for
 511          * @return The Sones that like the given post
 512          */
 513         public Set<Sone> getLikes(Post post) {
 514                 Set<Sone> sones = new HashSet<Sone>();
 515                 for (Sone sone : getSones()) {
 516                         if (sone.getLikedPostIds().contains(post.getId())) {
 517                                 sones.add(sone);
 518                         }
 519                 }
 520                 return sones;
 521         }
 522
 523         /**
 524          * Returns all Sones that have liked the given reply.
 525          *
 526          * @param reply
 527          *            The reply to get the liking Sones for
 528          * @return The Sones that like the given reply
 529          */
 530         public Set<Sone> getLikes(PostReply reply) {
 531                 Set<Sone> sones = new HashSet<Sone>();
 532                 for (Sone sone : getSones()) {
 533                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 534                                 sones.add(sone);
 535                         }
 536                 }
 537                 return sones;
 538         }
 539
 540         /**
 541          * Returns whether the given post is bookmarked.
 542          *
 543          * @param post
 544          *            The post to check
 545          * @return {@code true} if the given post is bookmarked, {@code false}
 546          *         otherwise
 547          */
 548         public boolean isBookmarked(Post post) {
 549                 return isPostBookmarked(post.getId());
 550         }
 551
 552         /**
 553          * Returns whether the post with the given ID is bookmarked.
 554          *
 555          * @param id
 556          *            The ID of the post to check
 557          * @return {@code true} if the post with the given ID is bookmarked,
 558          *         {@code false} otherwise
 559          */
 560         public boolean isPostBookmarked(String id) {
 561                 synchronized (bookmarkedPosts) {
 562                         return bookmarkedPosts.contains(id);
 563                 }
 564         }
 565
 566         /**
 567          * Returns all currently known bookmarked posts.
 568          *
 569          * @return All bookmarked posts
 570          */
 571         public Set<Post> getBookmarkedPosts() {
 572                 Set<Post> posts = new HashSet<Post>();
 573                 synchronized (bookmarkedPosts) {
 574                         for (String bookmarkedPostId : bookmarkedPosts) {
 575                                 Optional<Post> post = getPost(bookmarkedPostId);
 576                                 if (post.isPresent()) {
 577                                         posts.add(post.get());
 578                                 }
 579                         }
 580                 }
 581                 return posts;
 582         }
 583
 584         /**
 585          * Returns the album with the given ID, creating a new album if no album
 586          * with the given ID can be found.
 587          *
 588          * @param albumId
 589          *            The ID of the album
 590          * @return The album with the given ID
 591          */
 592         public Album getAlbum(String albumId) {
 593                 return getAlbum(albumId, true);
 594         }
 595
 596         /**
 597          * Returns the album with the given ID, optionally creating a new album if
 598          * an album with the given ID can not be found.
 599          *
 600          * @param albumId
 601          *            The ID of the album
 602          * @param create
 603          *            {@code true} to create a new album if none exists for the
 604          *            given ID
 605          * @return The album with the given ID, or {@code null} if no album with the
 606          *         given ID exists and {@code create} is {@code false}
 607          */
 608         public Album getAlbum(String albumId, boolean create) {
 609                 Optional<Album> album = database.getAlbum(albumId);
 610                 if (album.isPresent()) {
 611                         return album.get();
 612                 }
 613                 if (!create) {
 614                         return null;
 615                 }
 616                 Album newAlbum = database.newAlbumBuilder().withId(albumId).build();
 617                 database.storeAlbum(newAlbum);
 618                 return newAlbum;
 619         }
 620
 621         /**
 622          * Returns the image with the given ID, creating it if necessary.
 623          *
 624          * @param imageId
 625          *            The ID of the image
 626          * @return The image with the given ID
 627          */
 628         public Image getImage(String imageId) {
 629                 return getImage(imageId, true);
 630         }
 631
 632         /**
 633          * Returns the image with the given ID, optionally creating it if it does
 634          * not exist.
 635          *
 636          * @param imageId
 637          *            The ID of the image
 638          * @param create
 639          *            {@code true} to create an image if none exists with the given
 640          *            ID
 641          * @return The image with the given ID, or {@code null} if none exists and
 642          *         none was created
 643          */
 644         public Image getImage(String imageId, boolean create) {
 645                 Optional<Image> image = database.getImage(imageId);
 646                 if (image.isPresent()) {
 647                         return image.get();
 648                 }
 649                 if (!create) {
 650                         return null;
 651                 }
 652                 Image newImage = database.newImageBuilder().withId(imageId).build();
 653                 database.storeImage(newImage);
 654                 return newImage;
 655         }
 656
 657         /**
 658          * Returns the temporary image with the given ID.
 659          *
 660          * @param imageId
 661          *            The ID of the temporary image
 662          * @return The temporary image, or {@code null} if there is no temporary
 663          *         image with the given ID
 664          */
 665         public TemporaryImage getTemporaryImage(String imageId) {
 666                 synchronized (temporaryImages) {
 667                         return temporaryImages.get(imageId);
 668                 }
 669         }
 670
 671         //
 672         // ACTIONS
 673         //
 674
 675         /**
 676          * Locks the given Sone. A locked Sone will not be inserted by
 677          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 678          * again.
 679          *
 680          * @param sone
 681          *            The sone to lock
 682          */
 683         public void lockSone(Sone sone) {
 684                 synchronized (lockedSones) {
 685                         if (lockedSones.add(sone)) {
 686                                 eventBus.post(new SoneLockedEvent(sone));
 687                         }
 688                 }
 689         }
 690
 691         /**
 692          * Unlocks the given Sone.
 693          *
 694          * @see #lockSone(Sone)
 695          * @param sone
 696          *            The sone to unlock
 697          */
 698         public void unlockSone(Sone sone) {
 699                 synchronized (lockedSones) {
 700                         if (lockedSones.remove(sone)) {
 701                                 eventBus.post(new SoneUnlockedEvent(sone));
 702                         }
 703                 }
 704         }
 705
 706         /**
 707          * Adds a local Sone from the given own identity.
 708          *
 709          * @param ownIdentity
 710          *            The own identity to create a Sone from
 711          * @return The added (or already existing) Sone
 712          */
 713         public Sone addLocalSone(OwnIdentity ownIdentity) {
 714                 if (ownIdentity == null) {
 715                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 716                         return null;
 717                 }
 718                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 719                 synchronized (sones) {
 720                         final Sone sone;
 721                         try {
 722                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 723                         } catch (MalformedURLException mue1) {
 724                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 725                                 return null;
 726                         }
 727                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 728                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 729                         sone.setKnown(true);
 730                         /* TODO - load posts ’n stuff */
 731                         sones.put(ownIdentity.getId(), sone);
 732                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 733                         soneInserters.put(sone, soneInserter);
 734                         sone.setStatus(SoneStatus.idle);
 735                         loadSone(sone);
 736                         soneInserter.start();
 737                         return sone;
 738                 }
 739         }
 740
 741         /**
 742          * Creates a new Sone for the given own identity.
 743          *
 744          * @param ownIdentity
 745          *            The own identity to create a Sone for
 746          * @return The created Sone
 747          */
 748         public Sone createSone(OwnIdentity ownIdentity) {
 749                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 750                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 751                         return null;
 752                 }
 753                 Sone sone = addLocalSone(ownIdentity);
 754                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 755                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
 756                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
 757                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
 758                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
 759                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 760
 761                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 762                 touchConfiguration();
 763                 return sone;
 764         }
 765
 766         /**
 767          * Adds the Sone of the given identity.
 768          *
 769          * @param identity
 770          *            The identity whose Sone to add
 771          * @return The added or already existing Sone
 772          */
 773         public Sone addRemoteSone(Identity identity) {
 774                 if (identity == null) {
 775                         logger.log(Level.WARNING, "Given Identity is null!");
 776                         return null;
 777                 }
 778                 synchronized (sones) {
 779                         final Sone sone = getRemoteSone(identity.getId(), true);
 780                         if (sone.isLocal()) {
 781                                 return sone;
 782                         }
 783                         sone.setIdentity(identity);
 784                         boolean newSone = sone.getRequestUri() == null;
 785                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 786                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 787                         if (newSone) {
 788                                 synchronized (knownSones) {
 789                                         newSone = !knownSones.contains(sone.getId());
 790                                 }
 791                                 sone.setKnown(!newSone);
 792                                 if (newSone) {
 793                                         eventBus.post(new NewSoneFoundEvent(sone));
 794                                         for (Sone localSone : getLocalSones()) {
 795                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
 796                                                         followSone(localSone, sone.getId());
 797                                                 }
 798                                         }
 799                                 }
 800                         }
 801                         soneDownloader.addSone(sone);
 802                         soneDownloaders.execute(soneDownloader.new FetchSone(sone));
 803                         return sone;
 804                 }
 805         }
 806
 807         /**
 808          * Lets the given local Sone follow the Sone with the given ID.
 809          *
 810          * @param sone
 811          *            The local Sone that should follow another Sone
 812          * @param soneId
 813          *            The ID of the Sone to follow
 814          */
 815         public void followSone(Sone sone, String soneId) {
 816                 checkNotNull(sone, "sone must not be null");
 817                 checkNotNull(soneId, "soneId must not be null");
 818                 sone.addFriend(soneId);
 819                 synchronized (soneFollowingTimes) {
 820                         if (!soneFollowingTimes.containsKey(soneId)) {
 821                                 long now = System.currentTimeMillis();
 822                                 soneFollowingTimes.put(soneId, now);
 823                                 Optional<Sone> followedSone = getSone(soneId);
 824                                 if (!followedSone.isPresent()) {
 825                                         return;
 826                                 }
 827                                 for (Post post : followedSone.get().getPosts()) {
 828                                         if (post.getTime() < now) {
 829                                                 markPostKnown(post);
 830                                         }
 831                                 }
 832                                 for (PostReply reply : followedSone.get().getReplies()) {
 833                                         if (reply.getTime() < now) {
 834                                                 markReplyKnown(reply);
 835                                         }
 836                                 }
 837                         }
 838                 }
 839                 touchConfiguration();
 840         }
 841
 842         /**
 843          * Lets the given local Sone unfollow the Sone with the given ID.
 844          *
 845          * @param sone
 846          *            The local Sone that should unfollow another Sone
 847          * @param soneId
 848          *            The ID of the Sone being unfollowed
 849          */
 850         public void unfollowSone(Sone sone, String soneId) {
 851                 checkNotNull(sone, "sone must not be null");
 852                 checkNotNull(soneId, "soneId must not be null");
 853                 sone.removeFriend(soneId);
 854                 boolean unfollowedSoneStillFollowed = false;
 855                 for (Sone localSone : getLocalSones()) {
 856                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 857                 }
 858                 if (!unfollowedSoneStillFollowed) {
 859                         synchronized (soneFollowingTimes) {
 860                                 soneFollowingTimes.remove(soneId);
 861                         }
 862                 }
 863                 touchConfiguration();
 864         }
 865
 866         /**
 867          * Sets the trust value of the given origin Sone for the target Sone.
 868          *
 869          * @param origin
 870          *            The origin Sone
 871          * @param target
 872          *            The target Sone
 873          * @param trustValue
 874          *            The trust value (from {@code -100} to {@code 100})
 875          */
 876         public void setTrust(Sone origin, Sone target, int trustValue) {
 877                 checkNotNull(origin, "origin must not be null");
 878                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 879                 checkNotNull(target, "target must not be null");
 880                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 881                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 882         }
 883
 884         /**
 885          * Removes any trust assignment for the given target Sone.
 886          *
 887          * @param origin
 888          *            The trust origin
 889          * @param target
 890          *            The trust target
 891          */
 892         public void removeTrust(Sone origin, Sone target) {
 893                 checkNotNull(origin, "origin must not be null");
 894                 checkNotNull(target, "target must not be null");
 895                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 896                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 897         }
 898
 899         /**
 900          * Assigns the configured positive trust value for the given target.
 901          *
 902          * @param origin
 903          *            The trust origin
 904          * @param target
 905          *            The trust target
 906          */
 907         public void trustSone(Sone origin, Sone target) {
 908                 setTrust(origin, target, preferences.getPositiveTrust());
 909         }
 910
 911         /**
 912          * Assigns the configured negative trust value for the given target.
 913          *
 914          * @param origin
 915          *            The trust origin
 916          * @param target
 917          *            The trust target
 918          */
 919         public void distrustSone(Sone origin, Sone target) {
 920                 setTrust(origin, target, preferences.getNegativeTrust());
 921         }
 922
 923         /**
 924          * Removes the trust assignment for the given target.
 925          *
 926          * @param origin
 927          *            The trust origin
 928          * @param target
 929          *            The trust target
 930          */
 931         public void untrustSone(Sone origin, Sone target) {
 932                 removeTrust(origin, target);
 933         }
 934
 935         /**
 936          * Updates the stored Sone with the given Sone.
 937          *
 938          * @param sone
 939          *            The updated Sone
 940          */
 941         public void updateSone(Sone sone) {
 942                 updateSone(sone, false);
 943         }
 944
 945         /**
 946          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 947          * {@code true}, an older Sone than the current Sone can be given to restore
 948          * an old state.
 949          *
 950          * @param sone
 951          *            The Sone to update
 952          * @param soneRescueMode
 953          *            {@code true} if the stored Sone should be updated regardless
 954          *            of the age of the given Sone
 955          */
 956         public void updateSone(Sone sone, boolean soneRescueMode) {
 957                 Optional<Sone> storedSone = getSone(sone.getId());
 958                 if (storedSone.isPresent()) {
 959                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 960                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 961                                 return;
 962                         }
 963                         /* find removed posts. */
 964                         Collection<Post> removedPosts = new ArrayList<Post>();
 965                         Collection<Post> newPosts = new ArrayList<Post>();
 966                         Collection<Post> existingPosts = database.getPosts(sone.getId());
 967                         for (Post oldPost : existingPosts) {
 968                                 if (!sone.getPosts().contains(oldPost)) {
 969                                         removedPosts.add(oldPost);
 970                                 }
 971                         }
 972                         /* find new posts. */
 973                         for (Post newPost : sone.getPosts()) {
 974                                 if (existingPosts.contains(newPost)) {
 975                                         continue;
 976                                 }
 977                                 if (newPost.getTime() < getSoneFollowingTime(sone)) {
 978                                         newPost.setKnown(true);
 979                                 } else if (!newPost.isKnown()) {
 980                                         newPosts.add(newPost);
 981                                 }
 982                         }
 983                         /* store posts. */
 984                         database.storePosts(sone, sone.getPosts());
 985                         Collection<PostReply> newPostReplies = new ArrayList<PostReply>();
 986                         Collection<PostReply> removedPostReplies = new ArrayList<PostReply>();
 987                         if (!soneRescueMode) {
 988                                 for (PostReply reply : storedSone.get().getReplies()) {
 989                                         if (!sone.getReplies().contains(reply)) {
 990                                                 removedPostReplies.add(reply);
 991                                         }
 992                                 }
 993                         }
 994                         Set<PostReply> storedReplies = storedSone.get().getReplies();
 995                         for (PostReply reply : sone.getReplies()) {
 996                                 if (storedReplies.contains(reply)) {
 997                                         continue;
 998                                 }
 999                                 if (reply.getTime() < getSoneFollowingTime(sone)) {
1000                                         reply.setKnown(true);
1001                                 } else if (!reply.isKnown()) {
1002                                         newPostReplies.add(reply);
1003                                 }
1004                         }
1005                         database.storePostReplies(sone, sone.getReplies());
1006                         for (Album album : storedSone.get().getRootAlbum().getAlbums()) {
1007                                 database.removeAlbum(album);
1008                                 for (Image image : album.getImages()) {
1009                                         database.removeImage(image);
1010                                 }
1011                         }
1012                         for (Post removedPost : removedPosts) {
1013                                 eventBus.post(new PostRemovedEvent(removedPost));
1014                         }
1015                         for (Post newPost : newPosts) {
1016                                 eventBus.post(new NewPostFoundEvent(newPost));
1017                         }
1018                         for (PostReply removedPostReply : removedPostReplies) {
1019                                 eventBus.post(new PostReplyRemovedEvent(removedPostReply));
1020                         }
1021                         for (PostReply newPostReply : newPostReplies) {
1022                                 eventBus.post(new NewPostReplyFoundEvent(newPostReply));
1023                         }
1024                         for (Album album : sone.getRootAlbum().getAlbums()) {
1025                                 database.storeAlbum(album);
1026                                 for (Image image : album.getImages()) {
1027                                         database.storeImage(image);
1028                                 }
1029                         }
1030                         synchronized (sones) {
1031                                 sone.setOptions(storedSone.get().getOptions());
1032                                 sone.setKnown(storedSone.get().isKnown());
1033                                 sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
1034                                 if (sone.isLocal()) {
1035                                         soneInserters.get(storedSone.get()).setSone(sone);
1036                                         touchConfiguration();
1037                                 }
1038                                 sones.put(sone.getId(), sone);
1039                         }
1040                 }
1041         }
1042
1043         /**
1044          * Deletes the given Sone. This will remove the Sone from the
1045          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1046          * remove the context from its identity.
1047          *
1048          * @param sone
1049          *            The Sone to delete
1050          */
1051         public void deleteSone(Sone sone) {
1052                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1053                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1054                         return;
1055                 }
1056                 synchronized (sones) {
1057                         if (!getLocalSones().contains(sone)) {
1058                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1059                                 return;
1060                         }
1061                         sones.remove(sone.getId());
1062                         SoneInserter soneInserter = soneInserters.remove(sone);
1063                         soneInserter.stop();
1064                 }
1065                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1066                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1067                 try {
1068                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1069                 } catch (ConfigurationException ce1) {
1070                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1071                 }
1072         }
1073
1074         /**
1075          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1076          * known} before, a {@link MarkSoneKnownEvent} is fired.
1077          *
1078          * @param sone
1079          *            The Sone to mark as known
1080          */
1081         public void markSoneKnown(Sone sone) {
1082                 if (!sone.isKnown()) {
1083                         sone.setKnown(true);
1084                         synchronized (knownSones) {
1085                                 knownSones.add(sone.getId());
1086                         }
1087                         eventBus.post(new MarkSoneKnownEvent(sone));
1088                         touchConfiguration();
1089                 }
1090         }
1091
1092         /**
1093          * Loads and updates the given Sone from the configuration. If any error is
1094          * encountered, loading is aborted and the given Sone is not changed.
1095          *
1096          * @param sone
1097          *            The Sone to load and update
1098          */
1099         public void loadSone(Sone sone) {
1100                 if (!sone.isLocal()) {
1101                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1102                         return;
1103                 }
1104                 logger.info(String.format("Loading local Sone: %s", sone));
1105
1106                 /* initialize options. */
1107                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1108                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
1109                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
1110                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
1111                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
1112                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
1113
1114                 /* load Sone. */
1115                 String sonePrefix = "Sone/" + sone.getId();
1116                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1117                 if (soneTime == null) {
1118                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1119                         return;
1120                 }
1121                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1122
1123                 /* load profile. */
1124                 Profile profile = new Profile(sone);
1125                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1126                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1127                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1128                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1129                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1130                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1131
1132                 /* load profile fields. */
1133                 while (true) {
1134                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1135                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1136                         if (fieldName == null) {
1137                                 break;
1138                         }
1139                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1140                         profile.addField(fieldName).setValue(fieldValue);
1141                 }
1142
1143                 /* load posts. */
1144                 Set<Post> posts = new HashSet<Post>();
1145                 while (true) {
1146                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1147                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1148                         if (postId == null) {
1149                                 break;
1150                         }
1151                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1152                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1153                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1154                         if ((postTime == 0) || (postText == null)) {
1155                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1156                                 return;
1157                         }
1158                         PostBuilder postBuilder = postBuilder().withId(postId).from(sone.getId()).withTime(postTime).withText(postText);
1159                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1160                                 postBuilder.to(postRecipientId);
1161                         }
1162                         posts.add(postBuilder.build());
1163                 }
1164
1165                 /* load replies. */
1166                 Set<PostReply> replies = new HashSet<PostReply>();
1167                 while (true) {
1168                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1169                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1170                         if (replyId == null) {
1171                                 break;
1172                         }
1173                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1174                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1175                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1176                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1177                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1178                                 return;
1179                         }
1180                         PostReplyBuilder postReplyBuilder = postReplyBuilder().withId(replyId).from(sone.getId()).to(postId).withTime(replyTime).withText(replyText);
1181                         replies.add(postReplyBuilder.build());
1182                 }
1183
1184                 /* load post likes. */
1185                 Set<String> likedPostIds = new HashSet<String>();
1186                 while (true) {
1187                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1188                         if (likedPostId == null) {
1189                                 break;
1190                         }
1191                         likedPostIds.add(likedPostId);
1192                 }
1193
1194                 /* load reply likes. */
1195                 Set<String> likedReplyIds = new HashSet<String>();
1196                 while (true) {
1197                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1198                         if (likedReplyId == null) {
1199                                 break;
1200                         }
1201                         likedReplyIds.add(likedReplyId);
1202                 }
1203
1204                 /* load friends. */
1205                 Set<String> friends = new HashSet<String>();
1206                 while (true) {
1207                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1208                         if (friendId == null) {
1209                                 break;
1210                         }
1211                         friends.add(friendId);
1212                 }
1213
1214                 /* load albums. */
1215                 List<Album> topLevelAlbums = new ArrayList<Album>();
1216                 int albumCounter = 0;
1217                 while (true) {
1218                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1219                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1220                         if (albumId == null) {
1221                                 break;
1222                         }
1223                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1224                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1225                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1226                         String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
1227                         if ((albumTitle == null) || (albumDescription == null)) {
1228                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1229                                 return;
1230                         }
1231                         Album album = getAlbum(albumId).setSone(sone).modify().setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId).update();
1232                         if (albumParentId != null) {
1233                                 Album parentAlbum = getAlbum(albumParentId, false);
1234                                 if (parentAlbum == null) {
1235                                         logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
1236                                         return;
1237                                 }
1238                                 parentAlbum.addAlbum(album);
1239                         } else {
1240                                 if (!topLevelAlbums.contains(album)) {
1241                                         topLevelAlbums.add(album);
1242                                 }
1243                         }
1244                 }
1245
1246                 /* load images. */
1247                 int imageCounter = 0;
1248                 while (true) {
1249                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1250                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1251                         if (imageId == null) {
1252                                 break;
1253                         }
1254                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1255                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1256                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1257                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1258                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1259                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1260                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1261                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1262                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1263                                 return;
1264                         }
1265                         Album album = getAlbum(albumId, false);
1266                         if (album == null) {
1267                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1268                                 return;
1269                         }
1270                         Image image = getImage(imageId).modify().setSone(sone).setCreationTime(creationTime).setKey(key).setTitle(title).setDescription(description).setWidth(width).setHeight(height).update();
1271                         album.addImage(image);
1272                 }
1273
1274                 /* load avatar. */
1275                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1276                 if (avatarId != null) {
1277                         profile.setAvatar(getImage(avatarId, false));
1278                 }
1279
1280                 /* load options. */
1281                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1282                 sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1283                 sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1284                 sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1285                 sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1286                 sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1287
1288                 /* if we’re still here, Sone was loaded successfully. */
1289                 synchronized (sone) {
1290                         sone.setTime(soneTime);
1291                         sone.setProfile(profile);
1292                         sone.setPosts(posts);
1293                         sone.setReplies(replies);
1294                         sone.setLikePostIds(likedPostIds);
1295                         sone.setLikeReplyIds(likedReplyIds);
1296                         for (String friendId : friends) {
1297                                 followSone(sone, friendId);
1298                         }
1299                         for (Album album : sone.getRootAlbum().getAlbums()) {
1300                                 sone.getRootAlbum().removeAlbum(album);
1301                         }
1302                         for (Album album : topLevelAlbums) {
1303                                 sone.getRootAlbum().addAlbum(album);
1304                         }
1305                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1306                 }
1307                 synchronized (knownSones) {
1308                         for (String friend : friends) {
1309                                 knownSones.add(friend);
1310                         }
1311                 }
1312                 database.storePosts(sone, posts);
1313                 for (Post post : posts) {
1314                         post.setKnown(true);
1315                 }
1316                 database.storePostReplies(sone, replies);
1317                 for (PostReply reply : replies) {
1318                         reply.setKnown(true);
1319                 }
1320
1321                 logger.info(String.format("Sone loaded successfully: %s", sone));
1322         }
1323
1324         /**
1325          * Creates a new post.
1326          *
1327          * @param sone
1328          *            The Sone that creates the post
1329          * @param text
1330          *            The text of the post
1331          * @return The created post
1332          */
1333         public Post createPost(Sone sone, String text) {
1334                 return createPost(sone, System.currentTimeMillis(), text);
1335         }
1336
1337         /**
1338          * Creates a new post.
1339          *
1340          * @param sone
1341          *            The Sone that creates the post
1342          * @param time
1343          *            The time of the post
1344          * @param text
1345          *            The text of the post
1346          * @return The created post
1347          */
1348         public Post createPost(Sone sone, long time, String text) {
1349                 return createPost(sone, null, time, text);
1350         }
1351
1352         /**
1353          * Creates a new post.
1354          *
1355          * @param sone
1356          *            The Sone that creates the post
1357          * @param recipient
1358          *            The recipient Sone, or {@code null} if this post does not have
1359          *            a recipient
1360          * @param text
1361          *            The text of the post
1362          * @return The created post
1363          */
1364         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
1365                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1366         }
1367
1368         /**
1369          * Creates a new post.
1370          *
1371          * @param sone
1372          *            The Sone that creates the post
1373          * @param recipient
1374          *            The recipient Sone, or {@code null} if this post does not have
1375          *            a recipient
1376          * @param time
1377          *            The time of the post
1378          * @param text
1379          *            The text of the post
1380          * @return The created post
1381          */
1382         public Post createPost(Sone sone, Optional<Sone> recipient, long time, String text) {
1383                 checkNotNull(text, "text must not be null");
1384                 checkArgument(text.trim().length() > 0, "text must not be empty");
1385                 if (!sone.isLocal()) {
1386                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1387                         return null;
1388                 }
1389                 PostBuilder postBuilder = database.newPostBuilder();
1390                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1391                 if (recipient.isPresent()) {
1392                         postBuilder.to(recipient.get().getId());
1393                 }
1394                 final Post post = postBuilder.build();
1395                 database.storePost(post);
1396                 eventBus.post(new NewPostFoundEvent(post));
1397                 sone.addPost(post);
1398                 touchConfiguration();
1399                 localElementTicker.schedule(new Runnable() {
1400
1401                         /**
1402                          * {@inheritDoc}
1403                          */
1404                         @Override
1405                         public void run() {
1406                                 markPostKnown(post);
1407                         }
1408                 }, 10, TimeUnit.SECONDS);
1409                 return post;
1410         }
1411
1412         /**
1413          * Deletes the given post.
1414          *
1415          * @param post
1416          *            The post to delete
1417          */
1418         public void deletePost(Post post) {
1419                 if (!post.getSone().isLocal()) {
1420                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1421                         return;
1422                 }
1423                 database.removePost(post);
1424                 eventBus.post(new PostRemovedEvent(post));
1425                 markPostKnown(post);
1426                 touchConfiguration();
1427         }
1428
1429         /**
1430          * Marks the given post as known, if it is currently not a known post
1431          * (according to {@link Post#isKnown()}).
1432          *
1433          * @param post
1434          *            The post to mark as known
1435          */
1436         public void markPostKnown(Post post) {
1437                 post.setKnown(true);
1438                 eventBus.post(new MarkPostKnownEvent(post));
1439                 touchConfiguration();
1440                 for (PostReply reply : getReplies(post.getId())) {
1441                         markReplyKnown(reply);
1442                 }
1443         }
1444
1445         /**
1446          * Bookmarks the given post.
1447          *
1448          * @param post
1449          *            The post to bookmark
1450          */
1451         public void bookmark(Post post) {
1452                 bookmarkPost(post.getId());
1453         }
1454
1455         /**
1456          * Bookmarks the post with the given ID.
1457          *
1458          * @param id
1459          *            The ID of the post to bookmark
1460          */
1461         public void bookmarkPost(String id) {
1462                 synchronized (bookmarkedPosts) {
1463                         bookmarkedPosts.add(id);
1464                 }
1465         }
1466
1467         /**
1468          * Removes the given post from the bookmarks.
1469          *
1470          * @param post
1471          *            The post to unbookmark
1472          */
1473         public void unbookmark(Post post) {
1474                 unbookmarkPost(post.getId());
1475         }
1476
1477         /**
1478          * Removes the post with the given ID from the bookmarks.
1479          *
1480          * @param id
1481          *            The ID of the post to unbookmark
1482          */
1483         public void unbookmarkPost(String id) {
1484                 synchronized (bookmarkedPosts) {
1485                         bookmarkedPosts.remove(id);
1486                 }
1487         }
1488
1489         /**
1490          * Creates a new reply.
1491          *
1492          * @param sone
1493          *            The Sone that creates the reply
1494          * @param post
1495          *            The post that this reply refers to
1496          * @param text
1497          *            The text of the reply
1498          * @return The created reply
1499          */
1500         public PostReply createReply(Sone sone, Post post, String text) {
1501                 checkNotNull(text, "text must not be null");
1502                 checkArgument(text.trim().length() > 0, "text must not be empty");
1503                 if (!sone.isLocal()) {
1504                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1505                         return null;
1506                 }
1507                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1508                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1509                 final PostReply reply = postReplyBuilder.build();
1510                 database.storePostReply(reply);
1511                 eventBus.post(new NewPostReplyFoundEvent(reply));
1512                 sone.addReply(reply);
1513                 touchConfiguration();
1514                 localElementTicker.schedule(new Runnable() {
1515
1516                         /**
1517                          * {@inheritDoc}
1518                          */
1519                         @Override
1520                         public void run() {
1521                                 markReplyKnown(reply);
1522                         }
1523                 }, 10, TimeUnit.SECONDS);
1524                 return reply;
1525         }
1526
1527         /**
1528          * Deletes the given reply.
1529          *
1530          * @param reply
1531          *            The reply to delete
1532          */
1533         public void deleteReply(PostReply reply) {
1534                 Sone sone = reply.getSone();
1535                 if (!sone.isLocal()) {
1536                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1537                         return;
1538                 }
1539                 database.removePostReply(reply);
1540                 markReplyKnown(reply);
1541                 sone.removeReply(reply);
1542                 touchConfiguration();
1543         }
1544
1545         /**
1546          * Marks the given reply as known, if it is currently not a known reply
1547          * (according to {@link Reply#isKnown()}).
1548          *
1549          * @param reply
1550          *            The reply to mark as known
1551          */
1552         public void markReplyKnown(PostReply reply) {
1553                 boolean previouslyKnown = reply.isKnown();
1554                 reply.setKnown(true);
1555                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1556                 if (!previouslyKnown) {
1557                         touchConfiguration();
1558                 }
1559         }
1560
1561         /**
1562          * Creates a new top-level album for the given Sone.
1563          *
1564          * @param sone
1565          *            The Sone to create the album for
1566          * @return The new album
1567          */
1568         public Album createAlbum(Sone sone) {
1569                 return createAlbum(sone, sone.getRootAlbum());
1570         }
1571
1572         /**
1573          * Creates a new album for the given Sone.
1574          *
1575          * @param sone
1576          *            The Sone to create the album for
1577          * @param parent
1578          *            The parent of the album (may be {@code null} to create a
1579          *            top-level album)
1580          * @return The new album
1581          */
1582         public Album createAlbum(Sone sone, Album parent) {
1583                 Album album = database.newAlbumBuilder().randomId().build();
1584                 database.storeAlbum(album);
1585                 album.setSone(sone);
1586                 parent.addAlbum(album);
1587                 return album;
1588         }
1589
1590         /**
1591          * Deletes the given album. The owner of the album has to be a local Sone,
1592          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1593          *
1594          * @param album
1595          *            The album to remove
1596          */
1597         public void deleteAlbum(Album album) {
1598                 checkNotNull(album, "album must not be null");
1599                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1600                 if (!album.isEmpty()) {
1601                         return;
1602                 }
1603                 album.getParent().removeAlbum(album);
1604                 database.removeAlbum(album);
1605                 touchConfiguration();
1606         }
1607
1608         /**
1609          * Creates a new image.
1610          *
1611          * @param sone
1612          *            The Sone creating the image
1613          * @param album
1614          *            The album the image will be inserted into
1615          * @param temporaryImage
1616          *            The temporary image to create the image from
1617          * @return The newly created image
1618          */
1619         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1620                 checkNotNull(sone, "sone must not be null");
1621                 checkNotNull(album, "album must not be null");
1622                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1623                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1624                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1625                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1626                 album.addImage(image);
1627                 database.storeImage(image);
1628                 imageInserter.insertImage(temporaryImage, image);
1629                 return image;
1630         }
1631
1632         /**
1633          * Deletes the given image. This method will also delete a matching
1634          * temporary image.
1635          *
1636          * @see #deleteTemporaryImage(TemporaryImage)
1637          * @param image
1638          *            The image to delete
1639          */
1640         public void deleteImage(Image image) {
1641                 checkNotNull(image, "image must not be null");
1642                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1643                 deleteTemporaryImage(image.getId());
1644                 image.getAlbum().removeImage(image);
1645                 database.removeImage(image);
1646                 touchConfiguration();
1647         }
1648
1649         /**
1650          * Creates a new temporary image.
1651          *
1652          * @param mimeType
1653          *            The MIME type of the temporary image
1654          * @param imageData
1655          *            The encoded data of the image
1656          * @return The temporary image
1657          */
1658         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1659                 TemporaryImage temporaryImage = new TemporaryImage();
1660                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1661                 synchronized (temporaryImages) {
1662                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1663                 }
1664                 return temporaryImage;
1665         }
1666
1667         /**
1668          * Deletes the given temporary image.
1669          *
1670          * @param temporaryImage
1671          *            The temporary image to delete
1672          */
1673         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1674                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1675                 deleteTemporaryImage(temporaryImage.getId());
1676         }
1677
1678         /**
1679          * Deletes the temporary image with the given ID.
1680          *
1681          * @param imageId
1682          *            The ID of the temporary image to delete
1683          */
1684         public void deleteTemporaryImage(String imageId) {
1685                 checkNotNull(imageId, "imageId must not be null");
1686                 synchronized (temporaryImages) {
1687                         temporaryImages.remove(imageId);
1688                 }
1689                 Image image = getImage(imageId, false);
1690                 if (image != null) {
1691                         imageInserter.cancelImageInsert(image);
1692                 }
1693         }
1694
1695         /**
1696          * Notifies the core that the configuration, either of the core or of a
1697          * single local Sone, has changed, and that the configuration should be
1698          * saved.
1699          */
1700         public void touchConfiguration() {
1701                 lastConfigurationUpdate = System.currentTimeMillis();
1702         }
1703
1704         //
1705         // SERVICE METHODS
1706         //
1707
1708         /**
1709          * Starts the core.
1710          */
1711         @Override
1712         public void serviceStart() {
1713                 loadConfiguration();
1714                 updateChecker.start();
1715                 identityManager.start();
1716                 webOfTrustUpdater.init();
1717                 webOfTrustUpdater.start();
1718                 database.start();
1719         }
1720
1721         /**
1722          * {@inheritDoc}
1723          */
1724         @Override
1725         public void serviceRun() {
1726                 long lastSaved = System.currentTimeMillis();
1727                 while (!shouldStop()) {
1728                         sleep(1000);
1729                         long now = System.currentTimeMillis();
1730                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1731                                 for (Sone localSone : getLocalSones()) {
1732                                         saveSone(localSone);
1733                                 }
1734                                 saveConfiguration();
1735                                 lastSaved = now;
1736                         }
1737                 }
1738         }
1739
1740         /**
1741          * Stops the core.
1742          */
1743         @Override
1744         public void serviceStop() {
1745                 localElementTicker.shutdownNow();
1746                 synchronized (sones) {
1747                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1748                                 soneInserter.getValue().stop();
1749                                 saveSone(getLocalSone(soneInserter.getKey().getId(), false));
1750                         }
1751                 }
1752                 saveConfiguration();
1753                 database.stop();
1754                 webOfTrustUpdater.stop();
1755                 updateChecker.stop();
1756                 soneDownloader.stop();
1757                 soneDownloaders.shutdown();
1758                 identityManager.stop();
1759         }
1760
1761         //
1762         // PRIVATE METHODS
1763         //
1764
1765         /**
1766          * Saves the given Sone. This will persist all local settings for the given
1767          * Sone, such as the friends list and similar, private options.
1768          *
1769          * @param sone
1770          *            The Sone to save
1771          */
1772         private synchronized void saveSone(Sone sone) {
1773                 if (!sone.isLocal()) {
1774                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1775                         return;
1776                 }
1777                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1778                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1779                         return;
1780                 }
1781
1782                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1783                 try {
1784                         /* save Sone into configuration. */
1785                         String sonePrefix = "Sone/" + sone.getId();
1786                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1787                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1788
1789                         /* save profile. */
1790                         Profile profile = sone.getProfile();
1791                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1792                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1793                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1794                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1795                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1796                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1797                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1798
1799                         /* save profile fields. */
1800                         int fieldCounter = 0;
1801                         for (Field profileField : profile.getFields()) {
1802                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1803                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1804                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1805                         }
1806                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1807
1808                         /* save posts. */
1809                         int postCounter = 0;
1810                         for (Post post : sone.getPosts()) {
1811                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1812                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1813                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1814                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1815                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1816                         }
1817                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1818
1819                         /* save replies. */
1820                         int replyCounter = 0;
1821                         for (PostReply reply : sone.getReplies()) {
1822                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1823                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1824                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1825                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1826                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1827                         }
1828                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1829
1830                         /* save post likes. */
1831                         int postLikeCounter = 0;
1832                         for (String postId : sone.getLikedPostIds()) {
1833                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1834                         }
1835                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1836
1837                         /* save reply likes. */
1838                         int replyLikeCounter = 0;
1839                         for (String replyId : sone.getLikedReplyIds()) {
1840                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1841                         }
1842                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1843
1844                         /* save friends. */
1845                         int friendCounter = 0;
1846                         for (String friendId : sone.getFriends()) {
1847                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1848                         }
1849                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1850
1851                         /* save albums. first, collect in a flat structure, top-level first. */
1852                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1853
1854                         int albumCounter = 0;
1855                         for (Album album : albums) {
1856                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1857                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1858                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1859                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1860                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1861                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1862                         }
1863                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1864
1865                         /* save images. */
1866                         int imageCounter = 0;
1867                         for (Album album : albums) {
1868                                 for (Image image : album.getImages()) {
1869                                         if (!image.isInserted()) {
1870                                                 continue;
1871                                         }
1872                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1873                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1874                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1875                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1876                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1877                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1878                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1879                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1880                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1881                                 }
1882                         }
1883                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1884
1885                         /* save options. */
1886                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1887                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
1888                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
1889                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
1890                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
1891                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
1892
1893                         configuration.save();
1894
1895                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1896
1897                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1898                 } catch (ConfigurationException ce1) {
1899                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1900                 }
1901         }
1902
1903         /**
1904          * Saves the current options.
1905          */
1906         private void saveConfiguration() {
1907                 synchronized (configuration) {
1908                         if (storingConfiguration) {
1909                                 logger.log(Level.FINE, "Already storing configuration…");
1910                                 return;
1911                         }
1912                         storingConfiguration = true;
1913                 }
1914
1915                 /* store the options first. */
1916                 try {
1917                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
1918                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1919                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
1920                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
1921                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
1922                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
1923                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
1924                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
1925                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
1926                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
1927                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
1928                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
1929
1930                         /* save known Sones. */
1931                         int soneCounter = 0;
1932                         synchronized (knownSones) {
1933                                 for (String knownSoneId : knownSones) {
1934                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1935                                 }
1936                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1937                         }
1938
1939                         /* save Sone following times. */
1940                         soneCounter = 0;
1941                         synchronized (soneFollowingTimes) {
1942                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1943                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1944                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1945                                         ++soneCounter;
1946                                 }
1947                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1948                         }
1949
1950                         /* save known posts. */
1951                         database.save();
1952
1953                         /* save bookmarked posts. */
1954                         int bookmarkedPostCounter = 0;
1955                         synchronized (bookmarkedPosts) {
1956                                 for (String bookmarkedPostId : bookmarkedPosts) {
1957                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
1958                                 }
1959                         }
1960                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
1961
1962                         /* now save it. */
1963                         configuration.save();
1964
1965                 } catch (ConfigurationException ce1) {
1966                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1967                 } catch (DatabaseException de1) {
1968                         logger.log(Level.SEVERE, "Could not save database!", de1);
1969                 } finally {
1970                         synchronized (configuration) {
1971                                 storingConfiguration = false;
1972                         }
1973                 }
1974         }
1975
1976         /**
1977          * Loads the configuration.
1978          */
1979         private void loadConfiguration() {
1980                 /* create options. */
1981                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new SetInsertionDelay()));
1982                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
1983                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
1984                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
1985                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
1986                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
1987                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
1988                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
1989                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
1990                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, fcpInterface.new SetActive()));
1991                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, fcpInterface.new SetFullAccessRequired()));
1992
1993                 loadConfigurationValue("InsertionDelay");
1994                 loadConfigurationValue("PostsPerPage");
1995                 loadConfigurationValue("ImagesPerPage");
1996                 loadConfigurationValue("CharactersPerPost");
1997                 loadConfigurationValue("PostCutOffLength");
1998                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
1999                 loadConfigurationValue("PositiveTrust");
2000                 loadConfigurationValue("NegativeTrust");
2001                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2002                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2003                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2004
2005                 /* load known Sones. */
2006                 int soneCounter = 0;
2007                 while (true) {
2008                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2009                         if (knownSoneId == null) {
2010                                 break;
2011                         }
2012                         synchronized (knownSones) {
2013                                 knownSones.add(knownSoneId);
2014                         }
2015                 }
2016
2017                 /* load Sone following times. */
2018                 soneCounter = 0;
2019                 while (true) {
2020                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2021                         if (soneId == null) {
2022                                 break;
2023                         }
2024                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2025                         synchronized (soneFollowingTimes) {
2026                                 soneFollowingTimes.put(soneId, time);
2027                         }
2028                         ++soneCounter;
2029                 }
2030
2031                 /* load bookmarked posts. */
2032                 int bookmarkedPostCounter = 0;
2033                 while (true) {
2034                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2035                         if (bookmarkedPostId == null) {
2036                                 break;
2037                         }
2038                         synchronized (bookmarkedPosts) {
2039                                 bookmarkedPosts.add(bookmarkedPostId);
2040                         }
2041                 }
2042
2043         }
2044
2045         /**
2046          * Loads an {@link Integer} configuration value for the option with the
2047          * given name, logging validation failures.
2048          *
2049          * @param optionName
2050          *            The name of the option to load
2051          */
2052         private void loadConfigurationValue(String optionName) {
2053                 try {
2054                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2055                 } catch (IllegalArgumentException iae1) {
2056                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2057                 }
2058         }
2059
2060         /**
2061          * Notifies the core that a new {@link OwnIdentity} was added.
2062          *
2063          * @param ownIdentityAddedEvent
2064          *            The event
2065          */
2066         @Subscribe
2067         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2068                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2069                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2070                 if (ownIdentity.hasContext("Sone")) {
2071                         addLocalSone(ownIdentity);
2072                 }
2073         }
2074
2075         /**
2076          * Notifies the core that an {@link OwnIdentity} was removed.
2077          *
2078          * @param ownIdentityRemovedEvent
2079          *            The event
2080          */
2081         @Subscribe
2082         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2083                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2084                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2085                 trustedIdentities.removeAll(ownIdentity);
2086         }
2087
2088         /**
2089          * Notifies the core that a new {@link Identity} was added.
2090          *
2091          * @param identityAddedEvent
2092          *            The event
2093          */
2094         @Subscribe
2095         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2096                 Identity identity = identityAddedEvent.identity();
2097                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2098                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
2099                 addRemoteSone(identity);
2100         }
2101
2102         /**
2103          * Notifies the core that an {@link Identity} was updated.
2104          *
2105          * @param identityUpdatedEvent
2106          *            The event
2107          */
2108         @Subscribe
2109         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2110                 final Identity identity = identityUpdatedEvent.identity();
2111                 soneDownloaders.execute(new Runnable() {
2112
2113                         @Override
2114                         @SuppressWarnings("synthetic-access")
2115                         public void run() {
2116                                 Sone sone = getRemoteSone(identity.getId(), false);
2117                                 if (sone.isLocal()) {
2118                                         return;
2119                                 }
2120                                 sone.setIdentity(identity);
2121                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2122                                 soneDownloader.addSone(sone);
2123                                 soneDownloader.fetchSone(sone);
2124                         }
2125                 });
2126         }
2127
2128         /**
2129          * Notifies the core that an {@link Identity} was removed.
2130          *
2131          * @param identityRemovedEvent
2132          *            The event
2133          */
2134         @Subscribe
2135         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2136                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2137                 Identity identity = identityRemovedEvent.identity();
2138                 trustedIdentities.remove(ownIdentity, identity);
2139                 boolean foundIdentity = false;
2140                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
2141                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2142                                 continue;
2143                         }
2144                         if (trustedIdentity.getValue().contains(identity)) {
2145                                 foundIdentity = true;
2146                         }
2147                 }
2148                 if (foundIdentity) {
2149                         /* some local identity still trusts this identity, don’t remove. */
2150                         return;
2151                 }
2152                 Optional<Sone> sone = getSone(identity.getId());
2153                 if (!sone.isPresent()) {
2154                         /* TODO - we don’t have the Sone anymore. should this happen? */
2155                         return;
2156                 }
2157                 database.removePosts(sone.get());
2158                 for (Post post : sone.get().getPosts()) {
2159                         eventBus.post(new PostRemovedEvent(post));
2160                 }
2161                 database.removePostReplies(sone.get());
2162                 for (PostReply reply : sone.get().getReplies()) {
2163                         eventBus.post(new PostReplyRemovedEvent(reply));
2164                 }
2165                 synchronized (sones) {
2166                         sones.remove(identity.getId());
2167                 }
2168                 eventBus.post(new SoneRemovedEvent(sone.get()));
2169         }
2170
2171         /**
2172          * Deletes the temporary image.
2173          *
2174          * @param imageInsertFinishedEvent
2175          *            The event
2176          */
2177         @Subscribe
2178         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2179                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2180                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
2181                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2182                 touchConfiguration();
2183         }
2184
2185 }