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<Sone> lockedSones = new HashSet<Sone>();
 152
 153         /** Sone inserters. */
 154         /* synchronize access on this on sones. */
 155         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 156
 157         /** Sone rescuers. */
 158         /* synchronize access on this on sones. */
 159         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, 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(Sone sone) {
 273                 checkNotNull(sone, "sone must not be null");
 274                 checkArgument(sone.isLocal(), "sone must be local");
 275                 synchronized (soneRescuers) {
 276                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 277                         if (soneRescuer == null) {
 278                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 279                                 soneRescuers.put(sone, soneRescuer);
 280                                 soneRescuer.start();
 281                         }
 282                         return soneRescuer;
 283                 }
 284         }
 285
 286         /**
 287          * Returns whether the given Sone is currently locked.
 288          *
 289          * @param sone
 290          *            The sone to check
 291          * @return {@code true} if the Sone is locked, {@code false} if it is not
 292          */
 293         public boolean isLocked(Sone sone) {
 294                 synchronized (lockedSones) {
 295                         return lockedSones.contains(sone);
 296                 }
 297         }
 298
 299         public SoneBuilder soneBuilder() {
 300                 return database.newSoneBuilder();
 301         }
 302
 303         /**
 304          * {@inheritDocs}
 305          */
 306         @Override
 307         public Collection<Sone> getSones() {
 308                 return database.getSones();
 309         }
 310
 311         @Override
 312         public Function<String, Optional<Sone>> soneLoader() {
 313                 return database.soneLoader();
 314         }
 315
 316         /**
 317          * Returns the Sone with the given ID, regardless whether it’s local or
 318          * remote.
 319          *
 320          * @param id
 321          *            The ID of the Sone to get
 322          * @return The Sone with the given ID, or {@code null} if there is no such
 323          *         Sone
 324          */
 325         @Override
 326         public Optional<Sone> getSone(String id) {
 327                 return database.getSone(id);
 328         }
 329
 330         @Override
 331         public Collection<LocalSone> getLocalSones() {
 332                 return database.getLocalSones();
 333         }
 334
 335         public Optional<LocalSone> getLocalSone(String id) {
 336                 return database.getLocalSone(id);
 337         }
 338
 339         /**
 340          * {@inheritDocs}
 341          */
 342         @Override
 343         public Collection<Sone> getRemoteSones() {
 344                 return database.getRemoteSones();
 345         }
 346
 347         /**
 348          * Returns the remote Sone with the given ID.
 349          *
 350          *
 351          * @param id
 352          *            The ID of the remote Sone to get
 353          * @return The Sone with the given ID
 354          */
 355         public Sone getRemoteSone(String id) {
 356                 return database.getSone(id).orNull();
 357         }
 358
 359         /**
 360          * Returns whether the given Sone has been modified.
 361          *
 362          * @param sone
 363          *            The Sone to check for modifications
 364          * @return {@code true} if a modification has been detected in the Sone,
 365          *         {@code false} otherwise
 366          */
 367         public boolean isModifiedSone(Sone sone) {
 368                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 369         }
 370
 371         /**
 372          * Returns the time when the given was first followed by any local Sone.
 373          *
 374          * @param sone
 375          *            The Sone to get the time for
 376          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 377          *         been followed, or {@link Long#MAX_VALUE}
 378          */
 379         public long getSoneFollowingTime(Sone sone) {
 380                 synchronized (soneFollowingTimes) {
 381                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 382                 }
 383         }
 384
 385         /**
 386          * Returns a post builder.
 387          *
 388          * @return A new post builder
 389          */
 390         public PostBuilder postBuilder() {
 391                 return database.newPostBuilder();
 392         }
 393
 394         /**
 395          * {@inheritDoc}
 396          */
 397         @Override
 398         public Optional<Post> getPost(String postId) {
 399                 return database.getPost(postId);
 400         }
 401
 402         /**
 403          * {@inheritDocs}
 404          */
 405         @Override
 406         public Collection<Post> getPosts(String soneId) {
 407                 return database.getPosts(soneId);
 408         }
 409
 410         /**
 411          * {@inheritDoc}
 412          */
 413         @Override
 414         public Collection<Post> getDirectedPosts(final String recipientId) {
 415                 checkNotNull(recipientId, "recipient must not be null");
 416                 return database.getDirectedPosts(recipientId);
 417         }
 418
 419         /**
 420          * Returns a post reply builder.
 421          *
 422          * @return A new post reply builder
 423          */
 424         public PostReplyBuilder postReplyBuilder() {
 425                 return database.newPostReplyBuilder();
 426         }
 427
 428         /**
 429          * {@inheritDoc}
 430          */
 431         @Override
 432         public Optional<PostReply> getPostReply(String replyId) {
 433                 return database.getPostReply(replyId);
 434         }
 435
 436         /**
 437          * {@inheritDoc}
 438          */
 439         @Override
 440         public List<PostReply> getReplies(final String postId) {
 441                 return database.getReplies(postId);
 442         }
 443
 444         /**
 445          * Returns all Sones that have liked the given post.
 446          *
 447          * @param post
 448          *            The post to get the liking Sones for
 449          * @return The Sones that like the given post
 450          */
 451         public Set<Sone> getLikes(Post post) {
 452                 Set<Sone> sones = new HashSet<Sone>();
 453                 for (Sone sone : getSones()) {
 454                         if (sone.getLikedPostIds().contains(post.getId())) {
 455                                 sones.add(sone);
 456                         }
 457                 }
 458                 return sones;
 459         }
 460
 461         /**
 462          * Returns all Sones that have liked the given reply.
 463          *
 464          * @param reply
 465          *            The reply to get the liking Sones for
 466          * @return The Sones that like the given reply
 467          */
 468         public Set<Sone> getLikes(PostReply reply) {
 469                 Set<Sone> sones = new HashSet<Sone>();
 470                 for (Sone sone : getSones()) {
 471                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 472                                 sones.add(sone);
 473                         }
 474                 }
 475                 return sones;
 476         }
 477
 478         /**
 479          * Returns whether the given post is bookmarked.
 480          *
 481          * @param post
 482          *            The post to check
 483          * @return {@code true} if the given post is bookmarked, {@code false}
 484          *         otherwise
 485          */
 486         public boolean isBookmarked(Post post) {
 487                 return database.isPostBookmarked(post);
 488         }
 489
 490         /**
 491          * Returns all currently known bookmarked posts.
 492          *
 493          * @return All bookmarked posts
 494          */
 495         public Set<Post> getBookmarkedPosts() {
 496                 return database.getBookmarkedPosts();
 497         }
 498
 499         public AlbumBuilder albumBuilder() {
 500                 return database.newAlbumBuilder();
 501         }
 502
 503         /**
 504          * Returns the album with the given ID, optionally creating a new album if
 505          * an album with the given ID can not be found.
 506          *
 507          * @param albumId
 508          *            The ID of the album
 509          * @return The album with the given ID, or {@code null} if no album with the
 510          *         given ID exists
 511          */
 512         public Album getAlbum(String albumId) {
 513                 return database.getAlbum(albumId).orNull();
 514         }
 515
 516         public ImageBuilder imageBuilder() {
 517                 return database.newImageBuilder();
 518         }
 519
 520         /**
 521          * Returns the image with the given ID, creating it if necessary.
 522          *
 523          * @param imageId
 524          *            The ID of the image
 525          * @return The image with the given ID
 526          */
 527         public Image getImage(String imageId) {
 528                 return getImage(imageId, true);
 529         }
 530
 531         /**
 532          * Returns the image with the given ID, optionally creating it if it does
 533          * not exist.
 534          *
 535          * @param imageId
 536          *            The ID of the image
 537          * @param create
 538          *            {@code true} to create an image if none exists with the given
 539          *            ID
 540          * @return The image with the given ID, or {@code null} if none exists and
 541          *         none was created
 542          */
 543         public Image getImage(String imageId, boolean create) {
 544                 Optional<Image> image = database.getImage(imageId);
 545                 if (image.isPresent()) {
 546                         return image.get();
 547                 }
 548                 if (!create) {
 549                         return null;
 550                 }
 551                 Image newImage = database.newImageBuilder().withId(imageId).build();
 552                 database.storeImage(newImage);
 553                 return newImage;
 554         }
 555
 556         /**
 557          * Returns the temporary image with the given ID.
 558          *
 559          * @param imageId
 560          *            The ID of the temporary image
 561          * @return The temporary image, or {@code null} if there is no temporary
 562          *         image with the given ID
 563          */
 564         public TemporaryImage getTemporaryImage(String imageId) {
 565                 synchronized (temporaryImages) {
 566                         return temporaryImages.get(imageId);
 567                 }
 568         }
 569
 570         //
 571         // ACTIONS
 572         //
 573
 574         /**
 575          * Locks the given Sone. A locked Sone will not be inserted by
 576          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 577          * again.
 578          *
 579          * @param sone
 580          *            The sone to lock
 581          */
 582         public void lockSone(Sone sone) {
 583                 synchronized (lockedSones) {
 584                         if (lockedSones.add(sone)) {
 585                                 eventBus.post(new SoneLockedEvent(sone));
 586                         }
 587                 }
 588         }
 589
 590         /**
 591          * Unlocks the given Sone.
 592          *
 593          * @see #lockSone(Sone)
 594          * @param sone
 595          *            The sone to unlock
 596          */
 597         public void unlockSone(Sone sone) {
 598                 synchronized (lockedSones) {
 599                         if (lockedSones.remove(sone)) {
 600                                 eventBus.post(new SoneUnlockedEvent(sone));
 601                         }
 602                 }
 603         }
 604
 605         /**
 606          * Adds a local Sone from the given own identity.
 607          *
 608          * @param ownIdentity
 609          *            The own identity to create a Sone from
 610          * @return The added (or already existing) Sone
 611          */
 612         public Sone addLocalSone(OwnIdentity ownIdentity) {
 613                 if (ownIdentity == null) {
 614                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 615                         return null;
 616                 }
 617                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 618                 Sone sone = database.registerLocalSone(ownIdentity);
 619                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, ownIdentity.getId());
 620                 eventBus.register(soneInserter);
 621                 synchronized (soneInserters) {
 622                         soneInserters.put(sone, soneInserter);
 623                 }
 624                 synchronized (soneInserters) {
 625                         soneInserters.get(sone).setLastInsertFingerprint(database.getLastInsertFingerprint(sone));
 626                 }
 627                 sone.setStatus(SoneStatus.idle);
 628                 soneInserter.start();
 629                 return sone;
 630         }
 631
 632         /**
 633          * Creates a new Sone for the given own identity.
 634          *
 635          * @param ownIdentity
 636          *            The own identity to create a Sone for
 637          * @return The created Sone
 638          */
 639         public Sone createSone(OwnIdentity ownIdentity) {
 640                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 641                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 642                         return null;
 643                 }
 644                 Sone sone = addLocalSone(ownIdentity);
 645
 646                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 647                 touchConfiguration();
 648                 return sone;
 649         }
 650
 651         /**
 652          * Adds the Sone of the given identity.
 653          *
 654          * @param identity
 655          *            The identity whose Sone to add
 656          * @return The added or already existing Sone
 657          */
 658         public Sone addRemoteSone(Identity identity) {
 659                 if (identity == null) {
 660                         logger.log(Level.WARNING, "Given Identity is null!");
 661                         return null;
 662                 }
 663                 final Long latestEdition = tryParse(fromNullable(
 664                                 identity.getProperty("Sone.LatestEdition")).or("0"));
 665                 Optional<Sone> existingSone = getSone(identity.getId());
 666                 if (existingSone.isPresent() && existingSone.get().isLocal()) {
 667                         return existingSone.get();
 668                 }
 669                 boolean newSone = !existingSone.isPresent();
 670                 Sone sone = !newSone ? existingSone.get() : database.newSoneBuilder().from(identity).build();
 671                 sone.setLatestEdition(latestEdition);
 672                 if (newSone) {
 673                         synchronized (knownSones) {
 674                                 newSone = !knownSones.contains(sone.getId());
 675                         }
 676                         sone.setKnown(!newSone);
 677                         if (newSone) {
 678                                 eventBus.post(new NewSoneFoundEvent(sone));
 679                                 for (Sone localSone : getLocalSones()) {
 680                                         if (localSone.getOptions().isAutoFollow()) {
 681                                                 followSone(localSone, sone.getId());
 682                                         }
 683                                 }
 684                         }
 685                 }
 686                 database.storeSone(sone);
 687                 soneDownloader.addSone(sone);
 688                 soneDownloaders.execute(soneDownloader.fetchSoneWithUriAction(sone));
 689                 return sone;
 690         }
 691
 692         /**
 693          * Lets the given local Sone follow the Sone with the given ID.
 694          *
 695          * @param sone
 696          *            The local Sone that should follow another Sone
 697          * @param soneId
 698          *            The ID of the Sone to follow
 699          */
 700         public void followSone(Sone sone, String soneId) {
 701                 checkNotNull(sone, "sone must not be null");
 702                 checkNotNull(soneId, "soneId must not be null");
 703                 database.addFriend(sone, soneId);
 704                 synchronized (soneFollowingTimes) {
 705                         if (!soneFollowingTimes.containsKey(soneId)) {
 706                                 long now = System.currentTimeMillis();
 707                                 soneFollowingTimes.put(soneId, now);
 708                                 Optional<Sone> followedSone = getSone(soneId);
 709                                 if (!followedSone.isPresent()) {
 710                                         return;
 711                                 }
 712                                 for (Post post : followedSone.get().getPosts()) {
 713                                         if (post.getTime() < now) {
 714                                                 markPostKnown(post);
 715                                         }
 716                                 }
 717                                 for (PostReply reply : followedSone.get().getReplies()) {
 718                                         if (reply.getTime() < now) {
 719                                                 markReplyKnown(reply);
 720                                         }
 721                                 }
 722                         }
 723                 }
 724                 touchConfiguration();
 725         }
 726
 727         /**
 728          * Lets the given local Sone unfollow the Sone with the given ID.
 729          *
 730          * @param sone
 731          *            The local Sone that should unfollow another Sone
 732          * @param soneId
 733          *            The ID of the Sone being unfollowed
 734          */
 735         public void unfollowSone(Sone sone, String soneId) {
 736                 checkNotNull(sone, "sone must not be null");
 737                 checkNotNull(soneId, "soneId must not be null");
 738                 database.removeFriend(sone, soneId);
 739                 boolean unfollowedSoneStillFollowed = false;
 740                 for (Sone localSone : getLocalSones()) {
 741                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 742                 }
 743                 if (!unfollowedSoneStillFollowed) {
 744                         synchronized (soneFollowingTimes) {
 745                                 soneFollowingTimes.remove(soneId);
 746                         }
 747                 }
 748                 touchConfiguration();
 749         }
 750
 751         /**
 752          * Sets the trust value of the given origin Sone for the target Sone.
 753          *
 754          * @param origin
 755          *            The origin Sone
 756          * @param target
 757          *            The target Sone
 758          * @param trustValue
 759          *            The trust value (from {@code -100} to {@code 100})
 760          */
 761         public void setTrust(Sone origin, Sone target, int trustValue) {
 762                 checkNotNull(origin, "origin must not be null");
 763                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 764                 checkNotNull(target, "target must not be null");
 765                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 766                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 767         }
 768
 769         /**
 770          * Removes any trust assignment for the given target Sone.
 771          *
 772          * @param origin
 773          *            The trust origin
 774          * @param target
 775          *            The trust target
 776          */
 777         public void removeTrust(Sone origin, Sone target) {
 778                 checkNotNull(origin, "origin must not be null");
 779                 checkNotNull(target, "target must not be null");
 780                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 781                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 782         }
 783
 784         /**
 785          * Assigns the configured positive trust value for the given target.
 786          *
 787          * @param origin
 788          *            The trust origin
 789          * @param target
 790          *            The trust target
 791          */
 792         public void trustSone(Sone origin, Sone target) {
 793                 setTrust(origin, target, preferences.getPositiveTrust());
 794         }
 795
 796         /**
 797          * Assigns the configured negative trust value for the given target.
 798          *
 799          * @param origin
 800          *            The trust origin
 801          * @param target
 802          *            The trust target
 803          */
 804         public void distrustSone(Sone origin, Sone target) {
 805                 setTrust(origin, target, preferences.getNegativeTrust());
 806         }
 807
 808         /**
 809          * Removes the trust assignment for the given target.
 810          *
 811          * @param origin
 812          *            The trust origin
 813          * @param target
 814          *            The trust target
 815          */
 816         public void untrustSone(Sone origin, Sone target) {
 817                 removeTrust(origin, target);
 818         }
 819
 820         /**
 821          * Updates the stored Sone with the given Sone.
 822          *
 823          * @param sone
 824          *            The updated Sone
 825          */
 826         public void updateSone(Sone sone) {
 827                 updateSone(sone, false);
 828         }
 829
 830         /**
 831          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 832          * {@code true}, an older Sone than the current Sone can be given to restore
 833          * an old state.
 834          *
 835          * @param sone
 836          *            The Sone to update
 837          * @param soneRescueMode
 838          *            {@code true} if the stored Sone should be updated regardless
 839          *            of the age of the given Sone
 840          */
 841         public void updateSone(final Sone sone, boolean soneRescueMode) {
 842                 Optional<Sone> storedSone = getSone(sone.getId());
 843                 if (storedSone.isPresent()) {
 844                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 845                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 846                                 return;
 847                         }
 848                         List<Object> events =
 849                                         collectEventsForChangesInSone(storedSone.get(), sone);
 850                         database.storeSone(sone);
 851                         for (Object event : events) {
 852                                 eventBus.post(event);
 853                         }
 854                         sone.setOptions(storedSone.get().getOptions());
 855                         sone.setKnown(storedSone.get().isKnown());
 856                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 857                         if (sone.isLocal()) {
 858                                 touchConfiguration();
 859                         }
 860                 }
 861         }
 862
 863         private List<Object> collectEventsForChangesInSone(Sone oldSone,
 864                         final Sone newSone) {
 865                 final List<Object> events = new ArrayList<Object>();
 866                 SoneChangeDetector soneChangeDetector = new SoneChangeDetector(
 867                                 oldSone);
 868                 soneChangeDetector.onNewPosts(new PostProcessor() {
 869                         @Override
 870                         public void processPost(Post post) {
 871                                 if (post.getTime() < getSoneFollowingTime(newSone)) {
 872                                         post.setKnown(true);
 873                                 } else if (!post.isKnown()) {
 874                                         events.add(new NewPostFoundEvent(post));
 875                                 }
 876                         }
 877                 });
 878                 soneChangeDetector.onRemovedPosts(new PostProcessor() {
 879                         @Override
 880                         public void processPost(Post post) {
 881                                 events.add(new PostRemovedEvent(post));
 882                         }
 883                 });
 884                 soneChangeDetector.onNewPostReplies(new PostReplyProcessor() {
 885                         @Override
 886                         public void processPostReply(PostReply postReply) {
 887                                 if (postReply.getTime() < getSoneFollowingTime(newSone)) {
 888                                         postReply.setKnown(true);
 889                                 } else if (!postReply.isKnown()) {
 890                                         events.add(new NewPostReplyFoundEvent(postReply));
 891                                 }
 892                         }
 893                 });
 894                 soneChangeDetector.onRemovedPostReplies(new PostReplyProcessor() {
 895                         @Override
 896                         public void processPostReply(PostReply postReply) {
 897                                 events.add(new PostReplyRemovedEvent(postReply));
 898                         }
 899                 });
 900                 soneChangeDetector.detectChanges(newSone);
 901                 return events;
 902         }
 903
 904         /**
 905          * Deletes the given Sone. This will remove the Sone from the
 906          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 907          * remove the context from its identity.
 908          *
 909          * @param sone
 910          *            The Sone to delete
 911          */
 912         public void deleteSone(Sone sone) {
 913                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 914                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 915                         return;
 916                 }
 917                 if (!getLocalSones().contains(sone)) {
 918                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 919                         return;
 920                 }
 921                 SoneInserter soneInserter = soneInserters.remove(sone);
 922                 soneInserter.stop();
 923                 database.removeSone(sone);
 924                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 925                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 926                 try {
 927                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 928                 } catch (ConfigurationException ce1) {
 929                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 930                 }
 931         }
 932
 933         /**
 934          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 935          * known} before, a {@link MarkSoneKnownEvent} is fired.
 936          *
 937          * @param sone
 938          *            The Sone to mark as known
 939          */
 940         public void markSoneKnown(Sone sone) {
 941                 if (!sone.isKnown()) {
 942                         sone.setKnown(true);
 943                         synchronized (knownSones) {
 944                                 knownSones.add(sone.getId());
 945                         }
 946                         eventBus.post(new MarkSoneKnownEvent(sone));
 947                         touchConfiguration();
 948                 }
 949         }
 950
 951         /**
 952          * Creates a new post.
 953          *
 954          * @param sone
 955          *            The Sone that creates the post
 956          * @param recipient
 957          *            The recipient Sone, or {@code null} if this post does not have
 958          *            a recipient
 959          * @param text
 960          *            The text of the post
 961          * @return The created post
 962          */
 963         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
 964                 checkNotNull(text, "text must not be null");
 965                 checkArgument(text.trim().length() > 0, "text must not be empty");
 966                 if (!sone.isLocal()) {
 967                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
 968                         return null;
 969                 }
 970                 PostBuilder postBuilder = database.newPostBuilder();
 971                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
 972                 if (recipient.isPresent()) {
 973                         postBuilder.to(recipient.get().getId());
 974                 }
 975                 final Post post = postBuilder.build();
 976                 database.storePost(post);
 977                 eventBus.post(new NewPostFoundEvent(post));
 978                 sone.addPost(post);
 979                 touchConfiguration();
 980                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
 981                 return post;
 982         }
 983
 984         /**
 985          * Deletes the given post.
 986          *
 987          * @param post
 988          *            The post to delete
 989          */
 990         public void deletePost(Post post) {
 991                 if (!post.getSone().isLocal()) {
 992                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
 993                         return;
 994                 }
 995                 database.removePost(post);
 996                 eventBus.post(new PostRemovedEvent(post));
 997                 markPostKnown(post);
 998                 touchConfiguration();
 999         }
1000
1001         /**
1002          * Marks the given post as known, if it is currently not a known post
1003          * (according to {@link Post#isKnown()}).
1004          *
1005          * @param post
1006          *            The post to mark as known
1007          */
1008         public void markPostKnown(Post post) {
1009                 post.setKnown(true);
1010                 eventBus.post(new MarkPostKnownEvent(post));
1011                 touchConfiguration();
1012                 for (PostReply reply : getReplies(post.getId())) {
1013                         markReplyKnown(reply);
1014                 }
1015         }
1016
1017         public void bookmarkPost(Post post) {
1018                 database.bookmarkPost(post);
1019         }
1020
1021         /**
1022          * Removes the given post from the bookmarks.
1023          *
1024          * @param post
1025          *            The post to unbookmark
1026          */
1027         public void unbookmarkPost(Post post) {
1028                 database.unbookmarkPost(post);
1029         }
1030
1031         /**
1032          * Creates a new reply.
1033          *
1034          * @param sone
1035          *            The Sone that creates the reply
1036          * @param post
1037          *            The post that this reply refers to
1038          * @param text
1039          *            The text of the reply
1040          * @return The created reply
1041          */
1042         public PostReply createReply(Sone sone, Post post, String text) {
1043                 checkNotNull(text, "text must not be null");
1044                 checkArgument(text.trim().length() > 0, "text must not be empty");
1045                 if (!sone.isLocal()) {
1046                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1047                         return null;
1048                 }
1049                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1050                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1051                 final PostReply reply = postReplyBuilder.build();
1052                 database.storePostReply(reply);
1053                 eventBus.post(new NewPostReplyFoundEvent(reply));
1054                 sone.addReply(reply);
1055                 touchConfiguration();
1056                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1057                 return reply;
1058         }
1059
1060         /**
1061          * Deletes the given reply.
1062          *
1063          * @param reply
1064          *            The reply to delete
1065          */
1066         public void deleteReply(PostReply reply) {
1067                 Sone sone = reply.getSone();
1068                 if (!sone.isLocal()) {
1069                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1070                         return;
1071                 }
1072                 database.removePostReply(reply);
1073                 markReplyKnown(reply);
1074                 sone.removeReply(reply);
1075                 touchConfiguration();
1076         }
1077
1078         /**
1079          * Marks the given reply as known, if it is currently not a known reply
1080          * (according to {@link Reply#isKnown()}).
1081          *
1082          * @param reply
1083          *            The reply to mark as known
1084          */
1085         public void markReplyKnown(PostReply reply) {
1086                 boolean previouslyKnown = reply.isKnown();
1087                 reply.setKnown(true);
1088                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1089                 if (!previouslyKnown) {
1090                         touchConfiguration();
1091                 }
1092         }
1093
1094         /**
1095          * Creates a new album for the given Sone.
1096          *
1097          * @param sone
1098          *            The Sone to create the album for
1099          * @param parent
1100          *            The parent of the album (may be {@code null} to create a
1101          *            top-level album)
1102          * @return The new album
1103          */
1104         public Album createAlbum(Sone sone, Album parent) {
1105                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1106                 database.storeAlbum(album);
1107                 parent.addAlbum(album);
1108                 return album;
1109         }
1110
1111         /**
1112          * Deletes the given album. The owner of the album has to be a local Sone,
1113          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1114          *
1115          * @param album
1116          *            The album to remove
1117          */
1118         public void deleteAlbum(Album album) {
1119                 checkNotNull(album, "album must not be null");
1120                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1121                 if (!album.isEmpty()) {
1122                         return;
1123                 }
1124                 album.getParent().removeAlbum(album);
1125                 database.removeAlbum(album);
1126                 touchConfiguration();
1127         }
1128
1129         /**
1130          * Creates a new image.
1131          *
1132          * @param sone
1133          *            The Sone creating the image
1134          * @param album
1135          *            The album the image will be inserted into
1136          * @param temporaryImage
1137          *            The temporary image to create the image from
1138          * @return The newly created image
1139          */
1140         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1141                 checkNotNull(sone, "sone must not be null");
1142                 checkNotNull(album, "album must not be null");
1143                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1144                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1145                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1146                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1147                 album.addImage(image);
1148                 database.storeImage(image);
1149                 imageInserter.insertImage(temporaryImage, image);
1150                 return image;
1151         }
1152
1153         /**
1154          * Deletes the given image. This method will also delete a matching
1155          * temporary image.
1156          *
1157          * @see #deleteTemporaryImage(String)
1158          * @param image
1159          *            The image to delete
1160          */
1161         public void deleteImage(Image image) {
1162                 checkNotNull(image, "image must not be null");
1163                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1164                 deleteTemporaryImage(image.getId());
1165                 image.getAlbum().removeImage(image);
1166                 database.removeImage(image);
1167                 touchConfiguration();
1168         }
1169
1170         /**
1171          * Creates a new temporary image.
1172          *
1173          * @param mimeType
1174          *            The MIME type of the temporary image
1175          * @param imageData
1176          *            The encoded data of the image
1177          * @return The temporary image
1178          */
1179         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1180                 TemporaryImage temporaryImage = new TemporaryImage();
1181                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1182                 synchronized (temporaryImages) {
1183                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1184                 }
1185                 return temporaryImage;
1186         }
1187
1188         /**
1189          * Deletes the temporary image with the given ID.
1190          *
1191          * @param imageId
1192          *            The ID of the temporary image to delete
1193          */
1194         public void deleteTemporaryImage(String imageId) {
1195                 checkNotNull(imageId, "imageId must not be null");
1196                 synchronized (temporaryImages) {
1197                         temporaryImages.remove(imageId);
1198                 }
1199                 Image image = getImage(imageId, false);
1200                 if (image != null) {
1201                         imageInserter.cancelImageInsert(image);
1202                 }
1203         }
1204
1205         /**
1206          * Notifies the core that the configuration, either of the core or of a
1207          * single local Sone, has changed, and that the configuration should be
1208          * saved.
1209          */
1210         public void touchConfiguration() {
1211                 lastConfigurationUpdate = System.currentTimeMillis();
1212         }
1213
1214         //
1215         // SERVICE METHODS
1216         //
1217
1218         /**
1219          * Starts the core.
1220          */
1221         @Override
1222         public void serviceStart() {
1223                 loadConfiguration();
1224                 updateChecker.start();
1225                 identityManager.start();
1226                 webOfTrustUpdater.init();
1227                 webOfTrustUpdater.start();
1228                 database.start();
1229         }
1230
1231         /**
1232          * {@inheritDoc}
1233          */
1234         @Override
1235         public void serviceRun() {
1236                 long lastSaved = System.currentTimeMillis();
1237                 while (!shouldStop()) {
1238                         sleep(1000);
1239                         long now = System.currentTimeMillis();
1240                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1241                                 saveConfiguration();
1242                                 lastSaved = now;
1243                         }
1244                 }
1245         }
1246
1247         /**
1248          * Stops the core.
1249          */
1250         @Override
1251         public void serviceStop() {
1252                 localElementTicker.shutdownNow();
1253                 synchronized (soneInserters) {
1254                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1255                                 soneInserter.getValue().stop();
1256                         }
1257                 }
1258                 database.stop();
1259                 saveConfiguration();
1260                 webOfTrustUpdater.stop();
1261                 updateChecker.stop();
1262                 soneDownloader.stop();
1263                 soneDownloaders.shutdown();
1264                 identityManager.stop();
1265         }
1266
1267         //
1268         // PRIVATE METHODS
1269         //
1270
1271         /**
1272          * Saves the current options.
1273          */
1274         private void saveConfiguration() {
1275                 synchronized (configuration) {
1276                         if (storingConfiguration) {
1277                                 logger.log(Level.FINE, "Already storing configuration…");
1278                                 return;
1279                         }
1280                         storingConfiguration = true;
1281                 }
1282
1283                 /* store the options first. */
1284                 try {
1285                         preferences.saveTo(configuration);
1286
1287                         /* save known Sones. */
1288                         int soneCounter = 0;
1289                         synchronized (knownSones) {
1290                                 for (String knownSoneId : knownSones) {
1291                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1292                                 }
1293                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1294                         }
1295
1296                         /* save Sone following times. */
1297                         soneCounter = 0;
1298                         synchronized (soneFollowingTimes) {
1299                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1300                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1301                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1302                                         ++soneCounter;
1303                                 }
1304                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1305                         }
1306
1307                         /* save known posts. */
1308                         database.save();
1309
1310                         /* now save it. */
1311                         configuration.save();
1312
1313                 } catch (ConfigurationException ce1) {
1314                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1315                 } catch (DatabaseException de1) {
1316                         logger.log(Level.SEVERE, "Could not save database!", de1);
1317                 } finally {
1318                         synchronized (configuration) {
1319                                 storingConfiguration = false;
1320                         }
1321                 }
1322         }
1323
1324         /**
1325          * Loads the configuration.
1326          */
1327         private void loadConfiguration() {
1328                 new PreferencesLoader(preferences).loadFrom(configuration);
1329
1330                 /* load known Sones. */
1331                 int soneCounter = 0;
1332                 while (true) {
1333                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1334                         if (knownSoneId == null) {
1335                                 break;
1336                         }
1337                         synchronized (knownSones) {
1338                                 knownSones.add(knownSoneId);
1339                         }
1340                 }
1341
1342                 /* load Sone following times. */
1343                 soneCounter = 0;
1344                 while (true) {
1345                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
1346                         if (soneId == null) {
1347                                 break;
1348                         }
1349                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
1350                         synchronized (soneFollowingTimes) {
1351                                 soneFollowingTimes.put(soneId, time);
1352                         }
1353                         ++soneCounter;
1354                 }
1355         }
1356
1357         /**
1358          * Notifies the core that a new {@link OwnIdentity} was added.
1359          *
1360          * @param ownIdentityAddedEvent
1361          *            The event
1362          */
1363         @Subscribe
1364         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1365                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1366                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1367                 if (ownIdentity.hasContext("Sone")) {
1368                         addLocalSone(ownIdentity);
1369                 }
1370         }
1371
1372         /**
1373          * Notifies the core that an {@link OwnIdentity} was removed.
1374          *
1375          * @param ownIdentityRemovedEvent
1376          *            The event
1377          */
1378         @Subscribe
1379         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1380                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1381                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1382                 trustedIdentities.removeAll(ownIdentity);
1383         }
1384
1385         /**
1386          * Notifies the core that a new {@link Identity} was added.
1387          *
1388          * @param identityAddedEvent
1389          *            The event
1390          */
1391         @Subscribe
1392         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1393                 Identity identity = identityAddedEvent.identity();
1394                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1395                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1396                 addRemoteSone(identity);
1397         }
1398
1399         /**
1400          * Notifies the core that an {@link Identity} was updated.
1401          *
1402          * @param identityUpdatedEvent
1403          *            The event
1404          */
1405         @Subscribe
1406         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1407                 Identity identity = identityUpdatedEvent.identity();
1408                 final Sone sone = getRemoteSone(identity.getId());
1409                 if (sone.isLocal()) {
1410                         return;
1411                 }
1412                 sone.setLatestEdition(fromNullable(tryParse(identity.getProperty("Sone.LatestEdition"))).or(sone.getLatestEdition()));
1413                 soneDownloader.addSone(sone);
1414                 soneDownloaders.execute(soneDownloader.fetchSoneAction(sone));
1415         }
1416
1417         /**
1418          * Notifies the core that an {@link Identity} was removed.
1419          *
1420          * @param identityRemovedEvent
1421          *            The event
1422          */
1423         @Subscribe
1424         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1425                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1426                 Identity identity = identityRemovedEvent.identity();
1427                 trustedIdentities.remove(ownIdentity, identity);
1428                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1429                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1430                                 continue;
1431                         }
1432                         if (trustedIdentity.getValue().contains(identity)) {
1433                                 return;
1434                         }
1435                 }
1436                 Optional<Sone> sone = getSone(identity.getId());
1437                 if (!sone.isPresent()) {
1438                         /* TODO - we don’t have the Sone anymore. should this happen? */
1439                         return;
1440                 }
1441                 database.removeSone(sone.get());
1442                 eventBus.post(new SoneRemovedEvent(sone.get()));
1443         }
1444
1445         @Subscribe
1446         public void soneInserted(SoneInsertedEvent soneInsertedEvent) {
1447                 Sone sone = soneInsertedEvent.sone();
1448                 database.setLastInsertFingerprint(sone, soneInsertedEvent.insertFingerprint());
1449                 webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(
1450                                 sone.getLatestEdition()));
1451         }
1452
1453         /**
1454          * Deletes the temporary image.
1455          *
1456          * @param imageInsertFinishedEvent
1457          *            The event
1458          */
1459         @Subscribe
1460         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1461                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
1462                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
1463                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
1464                 touchConfiguration();
1465         }
1466
1467         @VisibleForTesting
1468         class MarkPostKnown implements Runnable {
1469
1470                 private final Post post;
1471
1472                 public MarkPostKnown(Post post) {
1473                         this.post = post;
1474                 }
1475
1476                 @Override
1477                 public void run() {
1478                         markPostKnown(post);
1479                 }
1480
1481         }
1482
1483         @VisibleForTesting
1484         class MarkReplyKnown implements Runnable {
1485
1486                 private final PostReply postReply;
1487
1488                 public MarkReplyKnown(PostReply postReply) {
1489                         this.postReply = postReply;
1490                 }
1491
1492                 @Override
1493                 public void run() {
1494                         markReplyKnown(postReply);
1495                 }
1496
1497         }
1498
1499 }