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.Optional.fromNullable;
  21 import static com.google.common.base.Preconditions.checkArgument;
  22 import static com.google.common.base.Preconditions.checkNotNull;
  23 import static com.google.common.primitives.Longs.tryParse;
  24 import static java.util.logging.Logger.getLogger;
  25
  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.SoneChangeDetector.PostProcessor;
  42 import net.pterodactylus.sone.core.SoneChangeDetector.PostReplyProcessor;
  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.SoneInsertedEvent;
  53 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  54 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  55 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  56 import net.pterodactylus.sone.data.Album;
  57 import net.pterodactylus.sone.data.Image;
  58 import net.pterodactylus.sone.data.LocalSone;
  59 import net.pterodactylus.sone.data.Post;
  60 import net.pterodactylus.sone.data.PostReply;
  61 import net.pterodactylus.sone.data.Reply;
  62 import net.pterodactylus.sone.data.Sone;
  63 import net.pterodactylus.sone.data.Sone.SoneStatus;
  64 import net.pterodactylus.sone.data.TemporaryImage;
  65 import net.pterodactylus.sone.database.AlbumBuilder;
  66 import net.pterodactylus.sone.database.Database;
  67 import net.pterodactylus.sone.database.DatabaseException;
  68 import net.pterodactylus.sone.database.ImageBuilder;
  69 import net.pterodactylus.sone.database.PostBuilder;
  70 import net.pterodactylus.sone.database.PostProvider;
  71 import net.pterodactylus.sone.database.PostReplyBuilder;
  72 import net.pterodactylus.sone.database.PostReplyProvider;
  73 import net.pterodactylus.sone.database.SoneBuilder;
  74 import net.pterodactylus.sone.database.SoneProvider;
  75 import net.pterodactylus.sone.freenet.wot.Identity;
  76 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  77 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  78 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  83 import net.pterodactylus.util.config.Configuration;
  84 import net.pterodactylus.util.config.ConfigurationException;
  85 import net.pterodactylus.util.service.AbstractService;
  86 import net.pterodactylus.util.thread.NamedThreadFactory;
  87
  88 import com.google.common.annotations.VisibleForTesting;
  89 import com.google.common.base.Function;
  90 import com.google.common.base.Optional;
  91 import com.google.common.collect.HashMultimap;
  92 import com.google.common.collect.Multimap;
  93 import com.google.common.collect.Multimaps;
  94 import com.google.common.eventbus.EventBus;
  95 import com.google.common.eventbus.Subscribe;
  96 import com.google.inject.Inject;
  97 import com.google.inject.Singleton;
  98
  99 /**
 100  * The Sone core.
 101  *
 102  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 103  */
 104 @Singleton
 105 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 106
 107         /** The logger. */
 108         private static final Logger logger = getLogger("Sone.Core");
 109
 110         /** The start time. */
 111         private final long startupTime = System.currentTimeMillis();
 112
 113         /** The preferences. */
 114         private final Preferences preferences;
 115
 116         /** The event bus. */
 117         private final EventBus eventBus;
 118
 119         /** The configuration. */
 120         private final Configuration configuration;
 121
 122         /** Whether we’re currently saving the configuration. */
 123         private boolean storingConfiguration = false;
 124
 125         /** The identity manager. */
 126         private final IdentityManager identityManager;
 127
 128         /** Interface to freenet. */
 129         private final FreenetInterface freenetInterface;
 130
 131         /** The Sone downloader. */
 132         private final SoneDownloader soneDownloader;
 133
 134         /** The image inserter. */
 135         private final ImageInserter imageInserter;
 136
 137         /** Sone downloader thread-pool. */
 138         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 139
 140         /** The update checker. */
 141         private final UpdateChecker updateChecker;
 142
 143         /** The trust updater. */
 144         private final WebOfTrustUpdater webOfTrustUpdater;
 145
 146         /** The times Sones were followed. */
 147         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 148
 149         /** Locked local Sones. */
 150         /* synchronize on itself. */
 151         private final Set<LocalSone> lockedSones = new HashSet<LocalSone>();
 152
 153         /** Sone inserters. */
 154         /* synchronize access on this on sones. */
 155         private final Map<LocalSone, SoneInserter> soneInserters = new HashMap<LocalSone, SoneInserter>();
 156
 157         /** Sone rescuers. */
 158         /* synchronize access on this on sones. */
 159         private final Map<LocalSone, SoneRescuer> soneRescuers = new HashMap<LocalSone, SoneRescuer>();
 160
 161         /** All known Sones. */
 162         private final Set<String> knownSones = new HashSet<String>();
 163
 164         /** The post database. */
 165         private final Database database;
 166
 167         /** Trusted identities, sorted by own identities. */
 168         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 169
 170         /** All temporary images. */
 171         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 172
 173         /** Ticker for threads that mark own elements as known. */
 174         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 175
 176         /** The time the configuration was last touched. */
 177         private volatile long lastConfigurationUpdate;
 178
 179         /**
 180          * Creates a new core.
 181          *
 182          * @param configuration
 183          *            The configuration of the core
 184          * @param freenetInterface
 185          *            The freenet interface
 186          * @param identityManager
 187          *            The identity manager
 188          * @param webOfTrustUpdater
 189          *            The WebOfTrust updater
 190          * @param eventBus
 191          *            The event bus
 192          * @param database
 193          *            The database
 194          */
 195         @Inject
 196         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 197                 super("Sone Core");
 198                 this.configuration = configuration;
 199                 this.freenetInterface = freenetInterface;
 200                 this.identityManager = identityManager;
 201                 this.soneDownloader = new SoneDownloaderImpl(this, freenetInterface);
 202                 this.imageInserter = new ImageInserter(freenetInterface, freenetInterface.new InsertTokenSupplier());
 203                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 204                 this.webOfTrustUpdater = webOfTrustUpdater;
 205                 this.eventBus = eventBus;
 206                 this.database = database;
 207                 preferences = new Preferences(eventBus);
 208         }
 209
 210         @VisibleForTesting
 211         protected Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 212                 super("Sone Core");
 213                 this.configuration = configuration;
 214                 this.freenetInterface = freenetInterface;
 215                 this.identityManager = identityManager;
 216                 this.soneDownloader = soneDownloader;
 217                 this.imageInserter = imageInserter;
 218                 this.updateChecker = updateChecker;
 219                 this.webOfTrustUpdater = webOfTrustUpdater;
 220                 this.eventBus = eventBus;
 221                 this.database = database;
 222                 preferences = new Preferences(eventBus);
 223         }
 224
 225         //
 226         // ACCESSORS
 227         //
 228
 229         /**
 230          * Returns the time Sone was started.
 231          *
 232          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 233          */
 234         public long getStartupTime() {
 235                 return startupTime;
 236         }
 237
 238         /**
 239          * Returns the options used by the core.
 240          *
 241          * @return The options of the core
 242          */
 243         public Preferences getPreferences() {
 244                 return preferences;
 245         }
 246
 247         /**
 248          * Returns the identity manager used by the core.
 249          *
 250          * @return The identity manager
 251          */
 252         public IdentityManager getIdentityManager() {
 253                 return identityManager;
 254         }
 255
 256         /**
 257          * Returns the update checker.
 258          *
 259          * @return The update checker
 260          */
 261         public UpdateChecker getUpdateChecker() {
 262                 return updateChecker;
 263         }
 264
 265         /**
 266          * Returns the Sone rescuer for the given local Sone.
 267          *
 268          * @param sone
 269          *            The local Sone to get the rescuer for
 270          * @return The Sone rescuer for the given Sone
 271          */
 272         public SoneRescuer getSoneRescuer(LocalSone sone) {
 273                 checkNotNull(sone, "sone must not be null");
 274                 synchronized (soneRescuers) {
 275                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 276                         if (soneRescuer == null) {
 277                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 278                                 soneRescuers.put(sone, soneRescuer);
 279                                 soneRescuer.start();
 280                         }
 281                         return soneRescuer;
 282                 }
 283         }
 284
 285         /**
 286          * Returns whether the given Sone is currently locked.
 287          *
 288          * @param sone
 289          *            The sone to check
 290          * @return {@code true} if the Sone is locked, {@code false} if it is not
 291          */
 292         public boolean isLocked(LocalSone sone) {
 293                 synchronized (lockedSones) {
 294                         return lockedSones.contains(sone);
 295                 }
 296         }
 297
 298         public SoneBuilder soneBuilder() {
 299                 return database.newSoneBuilder();
 300         }
 301
 302         /**
 303          * {@inheritDocs}
 304          */
 305         @Override
 306         public Collection<Sone> getSones() {
 307                 return database.getSones();
 308         }
 309
 310         @Override
 311         public Function<String, Optional<Sone>> soneLoader() {
 312                 return database.soneLoader();
 313         }
 314
 315         /**
 316          * Returns the Sone with the given ID, regardless whether it’s local or
 317          * remote.
 318          *
 319          * @param id
 320          *            The ID of the Sone to get
 321          * @return The Sone with the given ID, or {@code null} if there is no such
 322          *         Sone
 323          */
 324         @Override
 325         public Optional<Sone> getSone(String id) {
 326                 return database.getSone(id);
 327         }
 328
 329         @Override
 330         public Collection<LocalSone> getLocalSones() {
 331                 return database.getLocalSones();
 332         }
 333
 334         public Optional<LocalSone> getLocalSone(String id) {
 335                 return database.getLocalSone(id);
 336         }
 337
 338         /**
 339          * {@inheritDocs}
 340          */
 341         @Override
 342         public Collection<Sone> getRemoteSones() {
 343                 return database.getRemoteSones();
 344         }
 345
 346         /**
 347          * Returns the remote Sone with the given ID.
 348          *
 349          *
 350          * @param id
 351          *            The ID of the remote Sone to get
 352          * @return The Sone with the given ID
 353          */
 354         public Sone getRemoteSone(String id) {
 355                 return database.getSone(id).orNull();
 356         }
 357
 358         /**
 359          * Returns whether the given Sone has been modified.
 360          *
 361          * @param sone
 362          *            The Sone to check for modifications
 363          * @return {@code true} if a modification has been detected in the Sone,
 364          *         {@code false} otherwise
 365          */
 366         public boolean isModifiedSone(Sone sone) {
 367                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 368         }
 369
 370         /**
 371          * Returns the time when the given was first followed by any local Sone.
 372          *
 373          * @param sone
 374          *            The Sone to get the time for
 375          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 376          *         been followed, or {@link Long#MAX_VALUE}
 377          */
 378         public long getSoneFollowingTime(Sone sone) {
 379                 synchronized (soneFollowingTimes) {
 380                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 381                 }
 382         }
 383
 384         /**
 385          * Returns a post builder.
 386          *
 387          * @return A new post builder
 388          */
 389         public PostBuilder postBuilder() {
 390                 return database.newPostBuilder();
 391         }
 392
 393         /**
 394          * {@inheritDoc}
 395          */
 396         @Override
 397         public Optional<Post> getPost(String postId) {
 398                 return database.getPost(postId);
 399         }
 400
 401         /**
 402          * {@inheritDocs}
 403          */
 404         @Override
 405         public Collection<Post> getPosts(String soneId) {
 406                 return database.getPosts(soneId);
 407         }
 408
 409         /**
 410          * {@inheritDoc}
 411          */
 412         @Override
 413         public Collection<Post> getDirectedPosts(final String recipientId) {
 414                 checkNotNull(recipientId, "recipient must not be null");
 415                 return database.getDirectedPosts(recipientId);
 416         }
 417
 418         /**
 419          * Returns a post reply builder.
 420          *
 421          * @return A new post reply builder
 422          */
 423         public PostReplyBuilder postReplyBuilder() {
 424                 return database.newPostReplyBuilder();
 425         }
 426
 427         /**
 428          * {@inheritDoc}
 429          */
 430         @Override
 431         public Optional<PostReply> getPostReply(String replyId) {
 432                 return database.getPostReply(replyId);
 433         }
 434
 435         /**
 436          * {@inheritDoc}
 437          */
 438         @Override
 439         public List<PostReply> getReplies(final String postId) {
 440                 return database.getReplies(postId);
 441         }
 442
 443         /**
 444          * Returns all Sones that have liked the given post.
 445          *
 446          * @param post
 447          *            The post to get the liking Sones for
 448          * @return The Sones that like the given post
 449          */
 450         public Set<Sone> getLikes(Post post) {
 451                 Set<Sone> sones = new HashSet<Sone>();
 452                 for (Sone sone : getSones()) {
 453                         if (sone.getLikedPostIds().contains(post.getId())) {
 454                                 sones.add(sone);
 455                         }
 456                 }
 457                 return sones;
 458         }
 459
 460         /**
 461          * Returns all Sones that have liked the given reply.
 462          *
 463          * @param reply
 464          *            The reply to get the liking Sones for
 465          * @return The Sones that like the given reply
 466          */
 467         public Set<Sone> getLikes(PostReply reply) {
 468                 Set<Sone> sones = new HashSet<Sone>();
 469                 for (Sone sone : getSones()) {
 470                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 471                                 sones.add(sone);
 472                         }
 473                 }
 474                 return sones;
 475         }
 476
 477         /**
 478          * Returns whether the given post is bookmarked.
 479          *
 480          * @param post
 481          *            The post to check
 482          * @return {@code true} if the given post is bookmarked, {@code false}
 483          *         otherwise
 484          */
 485         public boolean isBookmarked(Post post) {
 486                 return database.isPostBookmarked(post);
 487         }
 488
 489         /**
 490          * Returns all currently known bookmarked posts.
 491          *
 492          * @return All bookmarked posts
 493          */
 494         public Set<Post> getBookmarkedPosts() {
 495                 return database.getBookmarkedPosts();
 496         }
 497
 498         public AlbumBuilder albumBuilder() {
 499                 return database.newAlbumBuilder();
 500         }
 501
 502         /**
 503          * Returns the album with the given ID, optionally creating a new album if
 504          * an album with the given ID can not be found.
 505          *
 506          * @param albumId
 507          *            The ID of the album
 508          * @return The album with the given ID, or {@code null} if no album with the
 509          *         given ID exists
 510          */
 511         public Album getAlbum(String albumId) {
 512                 return database.getAlbum(albumId).orNull();
 513         }
 514
 515         public ImageBuilder imageBuilder() {
 516                 return database.newImageBuilder();
 517         }
 518
 519         /**
 520          * Returns the image with the given ID, creating it if necessary.
 521          *
 522          * @param imageId
 523          *            The ID of the image
 524          * @return The image with the given ID
 525          */
 526         public Image getImage(String imageId) {
 527                 return getImage(imageId, true);
 528         }
 529
 530         /**
 531          * Returns the image with the given ID, optionally creating it if it does
 532          * not exist.
 533          *
 534          * @param imageId
 535          *            The ID of the image
 536          * @param create
 537          *            {@code true} to create an image if none exists with the given
 538          *            ID
 539          * @return The image with the given ID, or {@code null} if none exists and
 540          *         none was created
 541          */
 542         public Image getImage(String imageId, boolean create) {
 543                 Optional<Image> image = database.getImage(imageId);
 544                 if (image.isPresent()) {
 545                         return image.get();
 546                 }
 547                 if (!create) {
 548                         return null;
 549                 }
 550                 Image newImage = database.newImageBuilder().withId(imageId).build();
 551                 database.storeImage(newImage);
 552                 return newImage;
 553         }
 554
 555         /**
 556          * Returns the temporary image with the given ID.
 557          *
 558          * @param imageId
 559          *            The ID of the temporary image
 560          * @return The temporary image, or {@code null} if there is no temporary
 561          *         image with the given ID
 562          */
 563         public TemporaryImage getTemporaryImage(String imageId) {
 564                 synchronized (temporaryImages) {
 565                         return temporaryImages.get(imageId);
 566                 }
 567         }
 568
 569         //
 570         // ACTIONS
 571         //
 572
 573         /**
 574          * Locks the given Sone. A locked Sone will not be inserted by
 575          * {@link SoneInserter} until it is {@link #unlockSone(LocalSone) unlocked}
 576          * again.
 577          *
 578          * @param sone
 579          *            The sone to lock
 580          */
 581         public void lockSone(LocalSone sone) {
 582                 synchronized (lockedSones) {
 583                         if (lockedSones.add(sone)) {
 584                                 eventBus.post(new SoneLockedEvent(sone));
 585                         }
 586                 }
 587         }
 588
 589         /**
 590          * Unlocks the given Sone.
 591          *
 592          * @see #lockSone(LocalSone)
 593          * @param sone
 594          *            The sone to unlock
 595          */
 596         public void unlockSone(LocalSone sone) {
 597                 synchronized (lockedSones) {
 598                         if (lockedSones.remove(sone)) {
 599                                 eventBus.post(new SoneUnlockedEvent(sone));
 600                         }
 601                 }
 602         }
 603
 604         /**
 605          * Adds a local Sone from the given own identity.
 606          *
 607          * @param ownIdentity
 608          *            The own identity to create a Sone from
 609          * @return The added (or already existing) Sone
 610          */
 611         public Sone addLocalSone(OwnIdentity ownIdentity) {
 612                 if (ownIdentity == null) {
 613                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 614                         return null;
 615                 }
 616                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 617                 LocalSone sone = database.registerLocalSone(ownIdentity);
 618                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, ownIdentity.getId());
 619                 eventBus.register(soneInserter);
 620                 synchronized (soneInserters) {
 621                         soneInserters.put(sone, soneInserter);
 622                 }
 623                 synchronized (soneInserters) {
 624                         soneInserters.get(sone).setLastInsertFingerprint(database.getLastInsertFingerprint(sone));
 625                 }
 626                 sone.setStatus(SoneStatus.idle);
 627                 soneInserter.start();
 628                 return sone;
 629         }
 630
 631         /**
 632          * Creates a new Sone for the given own identity.
 633          *
 634          * @param ownIdentity
 635          *            The own identity to create a Sone for
 636          * @return The created Sone
 637          */
 638         public Sone createSone(OwnIdentity ownIdentity) {
 639                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 640                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 641                         return null;
 642                 }
 643                 Sone sone = addLocalSone(ownIdentity);
 644
 645                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 646                 touchConfiguration();
 647                 return sone;
 648         }
 649
 650         /**
 651          * Adds the Sone of the given identity.
 652          *
 653          * @param identity
 654          *            The identity whose Sone to add
 655          * @return The added or already existing Sone
 656          */
 657         public Sone addRemoteSone(Identity identity) {
 658                 if (identity == null) {
 659                         logger.log(Level.WARNING, "Given Identity is null!");
 660                         return null;
 661                 }
 662                 final Long latestEdition = tryParse(fromNullable(
 663                                 identity.getProperty("Sone.LatestEdition")).or("0"));
 664                 Optional<Sone> existingSone = getSone(identity.getId());
 665                 if (existingSone.isPresent() && existingSone.get().isLocal()) {
 666                         return existingSone.get();
 667                 }
 668                 boolean newSone = !existingSone.isPresent();
 669                 Sone sone = !newSone ? existingSone.get() : database.newSoneBuilder().from(identity).build();
 670                 sone.setLatestEdition(latestEdition);
 671                 if (newSone) {
 672                         synchronized (knownSones) {
 673                                 newSone = !knownSones.contains(sone.getId());
 674                         }
 675                         sone.setKnown(!newSone);
 676                         if (newSone) {
 677                                 eventBus.post(new NewSoneFoundEvent(sone));
 678                                 for (Sone localSone : getLocalSones()) {
 679                                         if (localSone.getOptions().isAutoFollow()) {
 680                                                 followSone(localSone, sone.getId());
 681                                         }
 682                                 }
 683                         }
 684                 }
 685                 database.storeSone(sone);
 686                 soneDownloader.addSone(sone);
 687                 soneDownloaders.execute(soneDownloader.fetchSoneWithUriAction(sone));
 688                 return sone;
 689         }
 690
 691         /**
 692          * Lets the given local Sone follow the Sone with the given ID.
 693          *
 694          * @param sone
 695          *            The local Sone that should follow another Sone
 696          * @param soneId
 697          *            The ID of the Sone to follow
 698          */
 699         public void followSone(Sone sone, String soneId) {
 700                 checkNotNull(sone, "sone must not be null");
 701                 checkNotNull(soneId, "soneId must not be null");
 702                 database.addFriend(sone, soneId);
 703                 synchronized (soneFollowingTimes) {
 704                         if (!soneFollowingTimes.containsKey(soneId)) {
 705                                 long now = System.currentTimeMillis();
 706                                 soneFollowingTimes.put(soneId, now);
 707                                 Optional<Sone> followedSone = getSone(soneId);
 708                                 if (!followedSone.isPresent()) {
 709                                         return;
 710                                 }
 711                                 for (Post post : followedSone.get().getPosts()) {
 712                                         if (post.getTime() < now) {
 713                                                 markPostKnown(post);
 714                                         }
 715                                 }
 716                                 for (PostReply reply : followedSone.get().getReplies()) {
 717                                         if (reply.getTime() < now) {
 718                                                 markReplyKnown(reply);
 719                                         }
 720                                 }
 721                         }
 722                 }
 723                 touchConfiguration();
 724         }
 725
 726         /**
 727          * Lets the given local Sone unfollow the Sone with the given ID.
 728          *
 729          * @param sone
 730          *            The local Sone that should unfollow another Sone
 731          * @param soneId
 732          *            The ID of the Sone being unfollowed
 733          */
 734         public void unfollowSone(Sone sone, String soneId) {
 735                 checkNotNull(sone, "sone must not be null");
 736                 checkNotNull(soneId, "soneId must not be null");
 737                 database.removeFriend(sone, soneId);
 738                 boolean unfollowedSoneStillFollowed = false;
 739                 for (Sone localSone : getLocalSones()) {
 740                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 741                 }
 742                 if (!unfollowedSoneStillFollowed) {
 743                         synchronized (soneFollowingTimes) {
 744                                 soneFollowingTimes.remove(soneId);
 745                         }
 746                 }
 747                 touchConfiguration();
 748         }
 749
 750         /**
 751          * Sets the trust value of the given origin Sone for the target Sone.
 752          *
 753          * @param origin
 754          *            The origin Sone
 755          * @param target
 756          *            The target Sone
 757          * @param trustValue
 758          *            The trust value (from {@code -100} to {@code 100})
 759          */
 760         public void setTrust(Sone origin, Sone target, int trustValue) {
 761                 checkNotNull(origin, "origin must not be null");
 762                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 763                 checkNotNull(target, "target must not be null");
 764                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 765                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 766         }
 767
 768         /**
 769          * Removes any trust assignment for the given target Sone.
 770          *
 771          * @param origin
 772          *            The trust origin
 773          * @param target
 774          *            The trust target
 775          */
 776         public void removeTrust(Sone origin, Sone target) {
 777                 checkNotNull(origin, "origin must not be null");
 778                 checkNotNull(target, "target must not be null");
 779                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 780                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 781         }
 782
 783         /**
 784          * Assigns the configured positive trust value for the given target.
 785          *
 786          * @param origin
 787          *            The trust origin
 788          * @param target
 789          *            The trust target
 790          */
 791         public void trustSone(Sone origin, Sone target) {
 792                 setTrust(origin, target, preferences.getPositiveTrust());
 793         }
 794
 795         /**
 796          * Assigns the configured negative trust value for the given target.
 797          *
 798          * @param origin
 799          *            The trust origin
 800          * @param target
 801          *            The trust target
 802          */
 803         public void distrustSone(Sone origin, Sone target) {
 804                 setTrust(origin, target, preferences.getNegativeTrust());
 805         }
 806
 807         /**
 808          * Removes the trust assignment for the given target.
 809          *
 810          * @param origin
 811          *            The trust origin
 812          * @param target
 813          *            The trust target
 814          */
 815         public void untrustSone(Sone origin, Sone target) {
 816                 removeTrust(origin, target);
 817         }
 818
 819         /**
 820          * Updates the stored Sone with the given Sone.
 821          *
 822          * @param sone
 823          *            The updated Sone
 824          */
 825         public void updateSone(Sone sone) {
 826                 updateSone(sone, false);
 827         }
 828
 829         /**
 830          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 831          * {@code true}, an older Sone than the current Sone can be given to restore
 832          * an old state.
 833          *
 834          * @param sone
 835          *            The Sone to update
 836          * @param soneRescueMode
 837          *            {@code true} if the stored Sone should be updated regardless
 838          *            of the age of the given Sone
 839          */
 840         public void updateSone(final Sone sone, boolean soneRescueMode) {
 841                 Optional<Sone> storedSone = getSone(sone.getId());
 842                 if (storedSone.isPresent()) {
 843                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 844                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 845                                 return;
 846                         }
 847                         List<Object> events =
 848                                         collectEventsForChangesInSone(storedSone.get(), sone);
 849                         database.storeSone(sone);
 850                         for (Object event : events) {
 851                                 eventBus.post(event);
 852                         }
 853                         sone.setOptions(storedSone.get().getOptions());
 854                         sone.setKnown(storedSone.get().isKnown());
 855                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 856                         if (sone.isLocal()) {
 857                                 touchConfiguration();
 858                         }
 859                 }
 860         }
 861
 862         private List<Object> collectEventsForChangesInSone(Sone oldSone,
 863                         final Sone newSone) {
 864                 final List<Object> events = new ArrayList<Object>();
 865                 SoneChangeDetector soneChangeDetector = new SoneChangeDetector(
 866                                 oldSone);
 867                 soneChangeDetector.onNewPosts(new PostProcessor() {
 868                         @Override
 869                         public void processPost(Post post) {
 870                                 if (post.getTime() < getSoneFollowingTime(newSone)) {
 871                                         post.setKnown(true);
 872                                 } else if (!post.isKnown()) {
 873                                         events.add(new NewPostFoundEvent(post));
 874                                 }
 875                         }
 876                 });
 877                 soneChangeDetector.onRemovedPosts(new PostProcessor() {
 878                         @Override
 879                         public void processPost(Post post) {
 880                                 events.add(new PostRemovedEvent(post));
 881                         }
 882                 });
 883                 soneChangeDetector.onNewPostReplies(new PostReplyProcessor() {
 884                         @Override
 885                         public void processPostReply(PostReply postReply) {
 886                                 if (postReply.getTime() < getSoneFollowingTime(newSone)) {
 887                                         postReply.setKnown(true);
 888                                 } else if (!postReply.isKnown()) {
 889                                         events.add(new NewPostReplyFoundEvent(postReply));
 890                                 }
 891                         }
 892                 });
 893                 soneChangeDetector.onRemovedPostReplies(new PostReplyProcessor() {
 894                         @Override
 895                         public void processPostReply(PostReply postReply) {
 896                                 events.add(new PostReplyRemovedEvent(postReply));
 897                         }
 898                 });
 899                 soneChangeDetector.detectChanges(newSone);
 900                 return events;
 901         }
 902
 903         /**
 904          * Deletes the given Sone. This will remove the Sone from the
 905          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 906          * remove the context from its identity.
 907          *
 908          * @param sone
 909          *            The Sone to delete
 910          */
 911         public void deleteSone(Sone sone) {
 912                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 913                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 914                         return;
 915                 }
 916                 if (!getLocalSones().contains(sone)) {
 917                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 918                         return;
 919                 }
 920                 SoneInserter soneInserter = soneInserters.remove(sone);
 921                 soneInserter.stop();
 922                 database.removeSone(sone);
 923                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 924                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 925                 try {
 926                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 927                 } catch (ConfigurationException ce1) {
 928                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 929                 }
 930         }
 931
 932         /**
 933          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 934          * known} before, a {@link MarkSoneKnownEvent} is fired.
 935          *
 936          * @param sone
 937          *            The Sone to mark as known
 938          */
 939         public void markSoneKnown(Sone sone) {
 940                 if (!sone.isKnown()) {
 941                         sone.setKnown(true);
 942                         synchronized (knownSones) {
 943                                 knownSones.add(sone.getId());
 944                         }
 945                         eventBus.post(new MarkSoneKnownEvent(sone));
 946                         touchConfiguration();
 947                 }
 948         }
 949
 950         /**
 951          * Creates a new post.
 952          *
 953          * @param sone
 954          *            The Sone that creates the post
 955          * @param recipient
 956          *            The recipient Sone, or {@code null} if this post does not have
 957          *            a recipient
 958          * @param text
 959          *            The text of the post
 960          * @return The created post
 961          */
 962         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
 963                 checkNotNull(text, "text must not be null");
 964                 checkArgument(text.trim().length() > 0, "text must not be empty");
 965                 if (!sone.isLocal()) {
 966                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
 967                         return null;
 968                 }
 969                 PostBuilder postBuilder = database.newPostBuilder();
 970                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
 971                 if (recipient.isPresent()) {
 972                         postBuilder.to(recipient.get().getId());
 973                 }
 974                 final Post post = postBuilder.build();
 975                 database.storePost(post);
 976                 eventBus.post(new NewPostFoundEvent(post));
 977                 sone.addPost(post);
 978                 touchConfiguration();
 979                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
 980                 return post;
 981         }
 982
 983         /**
 984          * Deletes the given post.
 985          *
 986          * @param post
 987          *            The post to delete
 988          */
 989         public void deletePost(Post post) {
 990                 if (!post.getSone().isLocal()) {
 991                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
 992                         return;
 993                 }
 994                 database.removePost(post);
 995                 eventBus.post(new PostRemovedEvent(post));
 996                 markPostKnown(post);
 997                 touchConfiguration();
 998         }
 999
1000         /**
1001          * Marks the given post as known, if it is currently not a known post
1002          * (according to {@link Post#isKnown()}).
1003          *
1004          * @param post
1005          *            The post to mark as known
1006          */
1007         public void markPostKnown(Post post) {
1008                 post.setKnown(true);
1009                 eventBus.post(new MarkPostKnownEvent(post));
1010                 touchConfiguration();
1011                 for (PostReply reply : getReplies(post.getId())) {
1012                         markReplyKnown(reply);
1013                 }
1014         }
1015
1016         public void bookmarkPost(Post post) {
1017                 database.bookmarkPost(post);
1018         }
1019
1020         /**
1021          * Removes the given post from the bookmarks.
1022          *
1023          * @param post
1024          *            The post to unbookmark
1025          */
1026         public void unbookmarkPost(Post post) {
1027                 database.unbookmarkPost(post);
1028         }
1029
1030         /**
1031          * Creates a new reply.
1032          *
1033          * @param sone
1034          *            The Sone that creates the reply
1035          * @param post
1036          *            The post that this reply refers to
1037          * @param text
1038          *            The text of the reply
1039          * @return The created reply
1040          */
1041         public PostReply createReply(Sone sone, Post post, String text) {
1042                 checkNotNull(text, "text must not be null");
1043                 checkArgument(text.trim().length() > 0, "text must not be empty");
1044                 if (!sone.isLocal()) {
1045                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1046                         return null;
1047                 }
1048                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1049                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1050                 final PostReply reply = postReplyBuilder.build();
1051                 database.storePostReply(reply);
1052                 eventBus.post(new NewPostReplyFoundEvent(reply));
1053                 sone.addReply(reply);
1054                 touchConfiguration();
1055                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1056                 return reply;
1057         }
1058
1059         /**
1060          * Deletes the given reply.
1061          *
1062          * @param reply
1063          *            The reply to delete
1064          */
1065         public void deleteReply(PostReply reply) {
1066                 Sone sone = reply.getSone();
1067                 if (!sone.isLocal()) {
1068                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1069                         return;
1070                 }
1071                 database.removePostReply(reply);
1072                 markReplyKnown(reply);
1073                 sone.removeReply(reply);
1074                 touchConfiguration();
1075         }
1076
1077         /**
1078          * Marks the given reply as known, if it is currently not a known reply
1079          * (according to {@link Reply#isKnown()}).
1080          *
1081          * @param reply
1082          *            The reply to mark as known
1083          */
1084         public void markReplyKnown(PostReply reply) {
1085                 boolean previouslyKnown = reply.isKnown();
1086                 reply.setKnown(true);
1087                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1088                 if (!previouslyKnown) {
1089                         touchConfiguration();
1090                 }
1091         }
1092
1093         /**
1094          * Creates a new album for the given Sone.
1095          *
1096          * @param sone
1097          *            The Sone to create the album for
1098          * @param parent
1099          *            The parent of the album (may be {@code null} to create a
1100          *            top-level album)
1101          * @return The new album
1102          */
1103         public Album createAlbum(Sone sone, Album parent) {
1104                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1105                 database.storeAlbum(album);
1106                 parent.addAlbum(album);
1107                 return album;
1108         }
1109
1110         /**
1111          * Deletes the given album. The owner of the album has to be a local Sone,
1112          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1113          *
1114          * @param album
1115          *            The album to remove
1116          */
1117         public void deleteAlbum(Album album) {
1118                 checkNotNull(album, "album must not be null");
1119                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1120                 if (!album.isEmpty()) {
1121                         return;
1122                 }
1123                 album.getParent().removeAlbum(album);
1124                 database.removeAlbum(album);
1125                 touchConfiguration();
1126         }
1127
1128         /**
1129          * Creates a new image.
1130          *
1131          * @param sone
1132          *            The Sone creating the image
1133          * @param album
1134          *            The album the image will be inserted into
1135          * @param temporaryImage
1136          *            The temporary image to create the image from
1137          * @return The newly created image
1138          */
1139         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1140                 checkNotNull(sone, "sone must not be null");
1141                 checkNotNull(album, "album must not be null");
1142                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1143                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1144                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1145                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1146                 album.addImage(image);
1147                 database.storeImage(image);
1148                 imageInserter.insertImage(temporaryImage, image);
1149                 return image;
1150         }
1151
1152         /**
1153          * Deletes the given image. This method will also delete a matching
1154          * temporary image.
1155          *
1156          * @see #deleteTemporaryImage(String)
1157          * @param image
1158          *            The image to delete
1159          */
1160         public void deleteImage(Image image) {
1161                 checkNotNull(image, "image must not be null");
1162                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1163                 deleteTemporaryImage(image.getId());
1164                 image.getAlbum().removeImage(image);
1165                 database.removeImage(image);
1166                 touchConfiguration();
1167         }
1168
1169         /**
1170          * Creates a new temporary image.
1171          *
1172          * @param mimeType
1173          *            The MIME type of the temporary image
1174          * @param imageData
1175          *            The encoded data of the image
1176          * @return The temporary image
1177          */
1178         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1179                 TemporaryImage temporaryImage = new TemporaryImage();
1180                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1181                 synchronized (temporaryImages) {
1182                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1183                 }
1184                 return temporaryImage;
1185         }
1186
1187         /**
1188          * Deletes the temporary image with the given ID.
1189          *
1190          * @param imageId
1191          *            The ID of the temporary image to delete
1192          */
1193         public void deleteTemporaryImage(String imageId) {
1194                 checkNotNull(imageId, "imageId must not be null");
1195                 synchronized (temporaryImages) {
1196                         temporaryImages.remove(imageId);
1197                 }
1198                 Image image = getImage(imageId, false);
1199                 if (image != null) {
1200                         imageInserter.cancelImageInsert(image);
1201                 }
1202         }
1203
1204         /**
1205          * Notifies the core that the configuration, either of the core or of a
1206          * single local Sone, has changed, and that the configuration should be
1207          * saved.
1208          */
1209         public void touchConfiguration() {
1210                 lastConfigurationUpdate = System.currentTimeMillis();
1211         }
1212
1213         //
1214         // SERVICE METHODS
1215         //
1216
1217         /**
1218          * Starts the core.
1219          */
1220         @Override
1221         public void serviceStart() {
1222                 loadConfiguration();
1223                 updateChecker.start();
1224                 identityManager.start();
1225                 webOfTrustUpdater.init();
1226                 webOfTrustUpdater.start();
1227                 database.start();
1228         }
1229
1230         /**
1231          * {@inheritDoc}
1232          */
1233         @Override
1234         public void serviceRun() {
1235                 long lastSaved = System.currentTimeMillis();
1236                 while (!shouldStop()) {
1237                         sleep(1000);
1238                         long now = System.currentTimeMillis();
1239                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1240                                 saveConfiguration();
1241                                 lastSaved = now;
1242                         }
1243                 }
1244         }
1245
1246         /**
1247          * Stops the core.
1248          */
1249         @Override
1250         public void serviceStop() {
1251                 localElementTicker.shutdownNow();
1252                 synchronized (soneInserters) {
1253                         for (Entry<LocalSone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1254                                 soneInserter.getValue().stop();
1255                         }
1256                 }
1257                 database.stop();
1258                 saveConfiguration();
1259                 webOfTrustUpdater.stop();
1260                 updateChecker.stop();
1261                 soneDownloader.stop();
1262                 soneDownloaders.shutdown();
1263                 identityManager.stop();
1264         }
1265
1266         //
1267         // PRIVATE METHODS
1268         //
1269
1270         /**
1271          * Saves the current options.
1272          */
1273         private void saveConfiguration() {
1274                 synchronized (configuration) {
1275                         if (storingConfiguration) {
1276                                 logger.log(Level.FINE, "Already storing configuration…");
1277                                 return;
1278                         }
1279                         storingConfiguration = true;
1280                 }
1281
1282                 /* store the options first. */
1283                 try {
1284                         preferences.saveTo(configuration);
1285
1286                         /* save known Sones. */
1287                         int soneCounter = 0;
1288                         synchronized (knownSones) {
1289                                 for (String knownSoneId : knownSones) {
1290                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1291                                 }
1292                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1293                         }
1294
1295                         /* save Sone following times. */
1296                         soneCounter = 0;
1297                         synchronized (soneFollowingTimes) {
1298                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1299                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1300                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1301                                         ++soneCounter;
1302                                 }
1303                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1304                         }
1305
1306                         /* save known posts. */
1307                         database.save();
1308
1309                         /* now save it. */
1310                         configuration.save();
1311
1312                 } catch (ConfigurationException ce1) {
1313                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1314                 } catch (DatabaseException de1) {
1315                         logger.log(Level.SEVERE, "Could not save database!", de1);
1316                 } finally {
1317                         synchronized (configuration) {
1318                                 storingConfiguration = false;
1319                         }
1320                 }
1321         }
1322
1323         /**
1324          * Loads the configuration.
1325          */
1326         private void loadConfiguration() {
1327                 new PreferencesLoader(preferences).loadFrom(configuration);
1328
1329                 /* load known Sones. */
1330                 int soneCounter = 0;
1331                 while (true) {
1332                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1333                         if (knownSoneId == null) {
1334                                 break;
1335                         }
1336                         synchronized (knownSones) {
1337                                 knownSones.add(knownSoneId);
1338                         }
1339                 }
1340
1341                 /* load Sone following times. */
1342                 soneCounter = 0;
1343                 while (true) {
1344                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
1345                         if (soneId == null) {
1346                                 break;
1347                         }
1348                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
1349                         synchronized (soneFollowingTimes) {
1350                                 soneFollowingTimes.put(soneId, time);
1351                         }
1352                         ++soneCounter;
1353                 }
1354         }
1355
1356         /**
1357          * Notifies the core that a new {@link OwnIdentity} was added.
1358          *
1359          * @param ownIdentityAddedEvent
1360          *            The event
1361          */
1362         @Subscribe
1363         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1364                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1365                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1366                 if (ownIdentity.hasContext("Sone")) {
1367                         addLocalSone(ownIdentity);
1368                 }
1369         }
1370
1371         /**
1372          * Notifies the core that an {@link OwnIdentity} was removed.
1373          *
1374          * @param ownIdentityRemovedEvent
1375          *            The event
1376          */
1377         @Subscribe
1378         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1379                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1380                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1381                 trustedIdentities.removeAll(ownIdentity);
1382         }
1383
1384         /**
1385          * Notifies the core that a new {@link Identity} was added.
1386          *
1387          * @param identityAddedEvent
1388          *            The event
1389          */
1390         @Subscribe
1391         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1392                 Identity identity = identityAddedEvent.identity();
1393                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1394                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1395                 addRemoteSone(identity);
1396         }
1397
1398         /**
1399          * Notifies the core that an {@link Identity} was updated.
1400          *
1401          * @param identityUpdatedEvent
1402          *            The event
1403          */
1404         @Subscribe
1405         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1406                 Identity identity = identityUpdatedEvent.identity();
1407                 final Sone sone = getRemoteSone(identity.getId());
1408                 if (sone.isLocal()) {
1409                         return;
1410                 }
1411                 sone.setLatestEdition(fromNullable(tryParse(identity.getProperty("Sone.LatestEdition"))).or(sone.getLatestEdition()));
1412                 soneDownloader.addSone(sone);
1413                 soneDownloaders.execute(soneDownloader.fetchSoneAction(sone));
1414         }
1415
1416         /**
1417          * Notifies the core that an {@link Identity} was removed.
1418          *
1419          * @param identityRemovedEvent
1420          *            The event
1421          */
1422         @Subscribe
1423         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1424                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1425                 Identity identity = identityRemovedEvent.identity();
1426                 trustedIdentities.remove(ownIdentity, identity);
1427                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1428                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1429                                 continue;
1430                         }
1431                         if (trustedIdentity.getValue().contains(identity)) {
1432                                 return;
1433                         }
1434                 }
1435                 Optional<Sone> sone = getSone(identity.getId());
1436                 if (!sone.isPresent()) {
1437                         /* TODO - we don’t have the Sone anymore. should this happen? */
1438                         return;
1439                 }
1440                 database.removeSone(sone.get());
1441                 eventBus.post(new SoneRemovedEvent(sone.get()));
1442         }
1443
1444         @Subscribe
1445         public void soneInserted(SoneInsertedEvent soneInsertedEvent) {
1446                 Sone sone = soneInsertedEvent.sone();
1447                 database.setLastInsertFingerprint(sone, soneInsertedEvent.insertFingerprint());
1448                 webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(
1449                                 sone.getLatestEdition()));
1450         }
1451
1452         /**
1453          * Deletes the temporary image.
1454          *
1455          * @param imageInsertFinishedEvent
1456          *            The event
1457          */
1458         @Subscribe
1459         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1460                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
1461                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
1462                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
1463                 touchConfiguration();
1464         }
1465
1466         @VisibleForTesting
1467         class MarkPostKnown implements Runnable {
1468
1469                 private final Post post;
1470
1471                 public MarkPostKnown(Post post) {
1472                         this.post = post;
1473                 }
1474
1475                 @Override
1476                 public void run() {
1477                         markPostKnown(post);
1478                 }
1479
1480         }
1481
1482         @VisibleForTesting
1483         class MarkReplyKnown implements Runnable {
1484
1485                 private final PostReply postReply;
1486
1487                 public MarkReplyKnown(PostReply postReply) {
1488                         this.postReply = postReply;
1489                 }
1490
1491                 @Override
1492                 public void run() {
1493                         markReplyKnown(postReply);
1494                 }
1495
1496         }
1497
1498 }