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.Post;
  59 import net.pterodactylus.sone.data.PostReply;
  60 import net.pterodactylus.sone.data.Reply;
  61 import net.pterodactylus.sone.data.Sone;
  62 import net.pterodactylus.sone.data.Sone.SoneStatus;
  63 import net.pterodactylus.sone.data.TemporaryImage;
  64 import net.pterodactylus.sone.database.AlbumBuilder;
  65 import net.pterodactylus.sone.database.Database;
  66 import net.pterodactylus.sone.database.DatabaseException;
  67 import net.pterodactylus.sone.database.ImageBuilder;
  68 import net.pterodactylus.sone.database.PostBuilder;
  69 import net.pterodactylus.sone.database.PostProvider;
  70 import net.pterodactylus.sone.database.PostReplyBuilder;
  71 import net.pterodactylus.sone.database.PostReplyProvider;
  72 import net.pterodactylus.sone.database.SoneBuilder;
  73 import net.pterodactylus.sone.database.SoneProvider;
  74 import net.pterodactylus.sone.freenet.wot.Identity;
  75 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  76 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  77 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  78 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  82 import net.pterodactylus.util.config.Configuration;
  83 import net.pterodactylus.util.config.ConfigurationException;
  84 import net.pterodactylus.util.service.AbstractService;
  85 import net.pterodactylus.util.thread.NamedThreadFactory;
  86
  87 import com.google.common.annotations.VisibleForTesting;
  88 import com.google.common.base.Function;
  89 import com.google.common.base.Optional;
  90 import com.google.common.collect.HashMultimap;
  91 import com.google.common.collect.Multimap;
  92 import com.google.common.collect.Multimaps;
  93 import com.google.common.eventbus.EventBus;
  94 import com.google.common.eventbus.Subscribe;
  95 import com.google.inject.Inject;
  96 import com.google.inject.Singleton;
  97
  98 /**
  99  * The Sone core.
 100  *
 101  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 102  */
 103 @Singleton
 104 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 105
 106         /** The logger. */
 107         private static final Logger logger = getLogger("Sone.Core");
 108
 109         /** The start time. */
 110         private final long startupTime = System.currentTimeMillis();
 111
 112         /** The preferences. */
 113         private final Preferences preferences;
 114
 115         /** The event bus. */
 116         private final EventBus eventBus;
 117
 118         /** The configuration. */
 119         private final Configuration configuration;
 120
 121         /** Whether we’re currently saving the configuration. */
 122         private boolean storingConfiguration = false;
 123
 124         /** The identity manager. */
 125         private final IdentityManager identityManager;
 126
 127         /** Interface to freenet. */
 128         private final FreenetInterface freenetInterface;
 129
 130         /** The Sone downloader. */
 131         private final SoneDownloader soneDownloader;
 132
 133         /** The image inserter. */
 134         private final ImageInserter imageInserter;
 135
 136         /** Sone downloader thread-pool. */
 137         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 138
 139         /** The update checker. */
 140         private final UpdateChecker updateChecker;
 141
 142         /** The trust updater. */
 143         private final WebOfTrustUpdater webOfTrustUpdater;
 144
 145         /** The times Sones were followed. */
 146         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 147
 148         /** Locked local Sones. */
 149         /* synchronize on itself. */
 150         private final Set<Sone> lockedSones = new HashSet<Sone>();
 151
 152         /** Sone inserters. */
 153         /* synchronize access on this on sones. */
 154         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 155
 156         /** Sone rescuers. */
 157         /* synchronize access on this on sones. */
 158         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 159
 160         /** All known Sones. */
 161         private final Set<String> knownSones = new HashSet<String>();
 162
 163         /** The post database. */
 164         private final Database database;
 165
 166         /** Trusted identities, sorted by own identities. */
 167         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 168
 169         /** All temporary images. */
 170         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 171
 172         /** Ticker for threads that mark own elements as known. */
 173         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 174
 175         /** The time the configuration was last touched. */
 176         private volatile long lastConfigurationUpdate;
 177
 178         /**
 179          * Creates a new core.
 180          *
 181          * @param configuration
 182          *            The configuration of the core
 183          * @param freenetInterface
 184          *            The freenet interface
 185          * @param identityManager
 186          *            The identity manager
 187          * @param webOfTrustUpdater
 188          *            The WebOfTrust updater
 189          * @param eventBus
 190          *            The event bus
 191          * @param database
 192          *            The database
 193          */
 194         @Inject
 195         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 196                 super("Sone Core");
 197                 this.configuration = configuration;
 198                 this.freenetInterface = freenetInterface;
 199                 this.identityManager = identityManager;
 200                 this.soneDownloader = new SoneDownloaderImpl(this, freenetInterface);
 201                 this.imageInserter = new ImageInserter(freenetInterface, freenetInterface.new InsertTokenSupplier());
 202                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 203                 this.webOfTrustUpdater = webOfTrustUpdater;
 204                 this.eventBus = eventBus;
 205                 this.database = database;
 206                 preferences = new Preferences(eventBus);
 207         }
 208
 209         @VisibleForTesting
 210         protected Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 211                 super("Sone Core");
 212                 this.configuration = configuration;
 213                 this.freenetInterface = freenetInterface;
 214                 this.identityManager = identityManager;
 215                 this.soneDownloader = soneDownloader;
 216                 this.imageInserter = imageInserter;
 217                 this.updateChecker = updateChecker;
 218                 this.webOfTrustUpdater = webOfTrustUpdater;
 219                 this.eventBus = eventBus;
 220                 this.database = database;
 221                 preferences = new Preferences(eventBus);
 222         }
 223
 224         //
 225         // ACCESSORS
 226         //
 227
 228         /**
 229          * Returns the time Sone was started.
 230          *
 231          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 232          */
 233         public long getStartupTime() {
 234                 return startupTime;
 235         }
 236
 237         /**
 238          * Returns the options used by the core.
 239          *
 240          * @return The options of the core
 241          */
 242         public Preferences getPreferences() {
 243                 return preferences;
 244         }
 245
 246         /**
 247          * Returns the identity manager used by the core.
 248          *
 249          * @return The identity manager
 250          */
 251         public IdentityManager getIdentityManager() {
 252                 return identityManager;
 253         }
 254
 255         /**
 256          * Returns the update checker.
 257          *
 258          * @return The update checker
 259          */
 260         public UpdateChecker getUpdateChecker() {
 261                 return updateChecker;
 262         }
 263
 264         /**
 265          * Returns the Sone rescuer for the given local Sone.
 266          *
 267          * @param sone
 268          *            The local Sone to get the rescuer for
 269          * @return The Sone rescuer for the given Sone
 270          */
 271         public SoneRescuer getSoneRescuer(Sone sone) {
 272                 checkNotNull(sone, "sone must not be null");
 273                 checkArgument(sone.isLocal(), "sone must be local");
 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(Sone 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         /**
 330          * {@inheritDocs}
 331          */
 332         @Override
 333         public Collection<Sone> getLocalSones() {
 334                 return database.getLocalSones();
 335         }
 336
 337         /**
 338          * Returns the local Sone with the given ID, optionally creating a new Sone.
 339          *
 340          * @param id
 341          *            The ID of the Sone
 342          * @return The Sone with the given ID, or {@code null}
 343          */
 344         public Sone getLocalSone(String id) {
 345                 Optional<Sone> sone = database.getSone(id);
 346                 if (sone.isPresent() && sone.get().isLocal()) {
 347                         return sone.get();
 348                 }
 349                 return null;
 350         }
 351
 352         /**
 353          * {@inheritDocs}
 354          */
 355         @Override
 356         public Collection<Sone> getRemoteSones() {
 357                 return database.getRemoteSones();
 358         }
 359
 360         /**
 361          * Returns the remote Sone with the given ID.
 362          *
 363          *
 364          * @param id
 365          *            The ID of the remote Sone to get
 366          * @return The Sone with the given ID
 367          */
 368         public Sone getRemoteSone(String id) {
 369                 return database.getSone(id).orNull();
 370         }
 371
 372         /**
 373          * Returns whether the given Sone has been modified.
 374          *
 375          * @param sone
 376          *            The Sone to check for modifications
 377          * @return {@code true} if a modification has been detected in the Sone,
 378          *         {@code false} otherwise
 379          */
 380         public boolean isModifiedSone(Sone sone) {
 381                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 382         }
 383
 384         /**
 385          * Returns the time when the given was first followed by any local Sone.
 386          *
 387          * @param sone
 388          *            The Sone to get the time for
 389          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 390          *         been followed, or {@link Long#MAX_VALUE}
 391          */
 392         public long getSoneFollowingTime(Sone sone) {
 393                 synchronized (soneFollowingTimes) {
 394                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 395                 }
 396         }
 397
 398         /**
 399          * Returns a post builder.
 400          *
 401          * @return A new post builder
 402          */
 403         public PostBuilder postBuilder() {
 404                 return database.newPostBuilder();
 405         }
 406
 407         /**
 408          * {@inheritDoc}
 409          */
 410         @Override
 411         public Optional<Post> getPost(String postId) {
 412                 return database.getPost(postId);
 413         }
 414
 415         /**
 416          * {@inheritDocs}
 417          */
 418         @Override
 419         public Collection<Post> getPosts(String soneId) {
 420                 return database.getPosts(soneId);
 421         }
 422
 423         /**
 424          * {@inheritDoc}
 425          */
 426         @Override
 427         public Collection<Post> getDirectedPosts(final String recipientId) {
 428                 checkNotNull(recipientId, "recipient must not be null");
 429                 return database.getDirectedPosts(recipientId);
 430         }
 431
 432         /**
 433          * Returns a post reply builder.
 434          *
 435          * @return A new post reply builder
 436          */
 437         public PostReplyBuilder postReplyBuilder() {
 438                 return database.newPostReplyBuilder();
 439         }
 440
 441         /**
 442          * {@inheritDoc}
 443          */
 444         @Override
 445         public Optional<PostReply> getPostReply(String replyId) {
 446                 return database.getPostReply(replyId);
 447         }
 448
 449         /**
 450          * {@inheritDoc}
 451          */
 452         @Override
 453         public List<PostReply> getReplies(final String postId) {
 454                 return database.getReplies(postId);
 455         }
 456
 457         /**
 458          * Returns all Sones that have liked the given post.
 459          *
 460          * @param post
 461          *            The post to get the liking Sones for
 462          * @return The Sones that like the given post
 463          */
 464         public Set<Sone> getLikes(Post post) {
 465                 Set<Sone> sones = new HashSet<Sone>();
 466                 for (Sone sone : getSones()) {
 467                         if (sone.getLikedPostIds().contains(post.getId())) {
 468                                 sones.add(sone);
 469                         }
 470                 }
 471                 return sones;
 472         }
 473
 474         /**
 475          * Returns all Sones that have liked the given reply.
 476          *
 477          * @param reply
 478          *            The reply to get the liking Sones for
 479          * @return The Sones that like the given reply
 480          */
 481         public Set<Sone> getLikes(PostReply reply) {
 482                 Set<Sone> sones = new HashSet<Sone>();
 483                 for (Sone sone : getSones()) {
 484                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 485                                 sones.add(sone);
 486                         }
 487                 }
 488                 return sones;
 489         }
 490
 491         /**
 492          * Returns whether the given post is bookmarked.
 493          *
 494          * @param post
 495          *            The post to check
 496          * @return {@code true} if the given post is bookmarked, {@code false}
 497          *         otherwise
 498          */
 499         public boolean isBookmarked(Post post) {
 500                 return database.isPostBookmarked(post);
 501         }
 502
 503         /**
 504          * Returns all currently known bookmarked posts.
 505          *
 506          * @return All bookmarked posts
 507          */
 508         public Set<Post> getBookmarkedPosts() {
 509                 return database.getBookmarkedPosts();
 510         }
 511
 512         public AlbumBuilder albumBuilder() {
 513                 return database.newAlbumBuilder();
 514         }
 515
 516         /**
 517          * Returns the album with the given ID, optionally creating a new album if
 518          * an album with the given ID can not be found.
 519          *
 520          * @param albumId
 521          *            The ID of the album
 522          * @return The album with the given ID, or {@code null} if no album with the
 523          *         given ID exists
 524          */
 525         public Album getAlbum(String albumId) {
 526                 return database.getAlbum(albumId).orNull();
 527         }
 528
 529         public ImageBuilder imageBuilder() {
 530                 return database.newImageBuilder();
 531         }
 532
 533         /**
 534          * Returns the image with the given ID, creating it if necessary.
 535          *
 536          * @param imageId
 537          *            The ID of the image
 538          * @return The image with the given ID
 539          */
 540         public Image getImage(String imageId) {
 541                 return getImage(imageId, true);
 542         }
 543
 544         /**
 545          * Returns the image with the given ID, optionally creating it if it does
 546          * not exist.
 547          *
 548          * @param imageId
 549          *            The ID of the image
 550          * @param create
 551          *            {@code true} to create an image if none exists with the given
 552          *            ID
 553          * @return The image with the given ID, or {@code null} if none exists and
 554          *         none was created
 555          */
 556         public Image getImage(String imageId, boolean create) {
 557                 Optional<Image> image = database.getImage(imageId);
 558                 if (image.isPresent()) {
 559                         return image.get();
 560                 }
 561                 if (!create) {
 562                         return null;
 563                 }
 564                 Image newImage = database.newImageBuilder().withId(imageId).build();
 565                 database.storeImage(newImage);
 566                 return newImage;
 567         }
 568
 569         /**
 570          * Returns the temporary image with the given ID.
 571          *
 572          * @param imageId
 573          *            The ID of the temporary image
 574          * @return The temporary image, or {@code null} if there is no temporary
 575          *         image with the given ID
 576          */
 577         public TemporaryImage getTemporaryImage(String imageId) {
 578                 synchronized (temporaryImages) {
 579                         return temporaryImages.get(imageId);
 580                 }
 581         }
 582
 583         //
 584         // ACTIONS
 585         //
 586
 587         /**
 588          * Locks the given Sone. A locked Sone will not be inserted by
 589          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 590          * again.
 591          *
 592          * @param sone
 593          *            The sone to lock
 594          */
 595         public void lockSone(Sone sone) {
 596                 synchronized (lockedSones) {
 597                         if (lockedSones.add(sone)) {
 598                                 eventBus.post(new SoneLockedEvent(sone));
 599                         }
 600                 }
 601         }
 602
 603         /**
 604          * Unlocks the given Sone.
 605          *
 606          * @see #lockSone(Sone)
 607          * @param sone
 608          *            The sone to unlock
 609          */
 610         public void unlockSone(Sone sone) {
 611                 synchronized (lockedSones) {
 612                         if (lockedSones.remove(sone)) {
 613                                 eventBus.post(new SoneUnlockedEvent(sone));
 614                         }
 615                 }
 616         }
 617
 618         /**
 619          * Adds a local Sone from the given own identity.
 620          *
 621          * @param ownIdentity
 622          *            The own identity to create a Sone from
 623          * @return The added (or already existing) Sone
 624          */
 625         public Sone addLocalSone(OwnIdentity ownIdentity) {
 626                 if (ownIdentity == null) {
 627                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 628                         return null;
 629                 }
 630                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 631                 Sone sone = database.registerLocalSone(ownIdentity);
 632                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, ownIdentity.getId());
 633                 eventBus.register(soneInserter);
 634                 synchronized (soneInserters) {
 635                         soneInserters.put(sone, soneInserter);
 636                 }
 637                 synchronized (soneInserters) {
 638                         soneInserters.get(sone).setLastInsertFingerprint(database.getLastInsertFingerprint(sone));
 639                 }
 640                 sone.setStatus(SoneStatus.idle);
 641                 soneInserter.start();
 642                 return sone;
 643         }
 644
 645         /**
 646          * Creates a new Sone for the given own identity.
 647          *
 648          * @param ownIdentity
 649          *            The own identity to create a Sone for
 650          * @return The created Sone
 651          */
 652         public Sone createSone(OwnIdentity ownIdentity) {
 653                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 654                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 655                         return null;
 656                 }
 657                 Sone sone = addLocalSone(ownIdentity);
 658
 659                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 660                 touchConfiguration();
 661                 return sone;
 662         }
 663
 664         /**
 665          * Adds the Sone of the given identity.
 666          *
 667          * @param identity
 668          *            The identity whose Sone to add
 669          * @return The added or already existing Sone
 670          */
 671         public Sone addRemoteSone(Identity identity) {
 672                 if (identity == null) {
 673                         logger.log(Level.WARNING, "Given Identity is null!");
 674                         return null;
 675                 }
 676                 final Long latestEdition = tryParse(fromNullable(
 677                                 identity.getProperty("Sone.LatestEdition")).or("0"));
 678                 Optional<Sone> existingSone = getSone(identity.getId());
 679                 if (existingSone.isPresent() && existingSone.get().isLocal()) {
 680                         return existingSone.get();
 681                 }
 682                 boolean newSone = !existingSone.isPresent();
 683                 Sone sone = !newSone ? existingSone.get() : database.newSoneBuilder().from(identity).build();
 684                 sone.setLatestEdition(latestEdition);
 685                 if (newSone) {
 686                         synchronized (knownSones) {
 687                                 newSone = !knownSones.contains(sone.getId());
 688                         }
 689                         sone.setKnown(!newSone);
 690                         if (newSone) {
 691                                 eventBus.post(new NewSoneFoundEvent(sone));
 692                                 for (Sone localSone : getLocalSones()) {
 693                                         if (localSone.getOptions().isAutoFollow()) {
 694                                                 followSone(localSone, sone.getId());
 695                                         }
 696                                 }
 697                         }
 698                 }
 699                 database.storeSone(sone);
 700                 soneDownloader.addSone(sone);
 701                 soneDownloaders.execute(soneDownloader.fetchSoneWithUriAction(sone));
 702                 return sone;
 703         }
 704
 705         /**
 706          * Lets the given local Sone follow the Sone with the given ID.
 707          *
 708          * @param sone
 709          *            The local Sone that should follow another Sone
 710          * @param soneId
 711          *            The ID of the Sone to follow
 712          */
 713         public void followSone(Sone sone, String soneId) {
 714                 checkNotNull(sone, "sone must not be null");
 715                 checkNotNull(soneId, "soneId must not be null");
 716                 database.addFriend(sone, soneId);
 717                 synchronized (soneFollowingTimes) {
 718                         if (!soneFollowingTimes.containsKey(soneId)) {
 719                                 long now = System.currentTimeMillis();
 720                                 soneFollowingTimes.put(soneId, now);
 721                                 Optional<Sone> followedSone = getSone(soneId);
 722                                 if (!followedSone.isPresent()) {
 723                                         return;
 724                                 }
 725                                 for (Post post : followedSone.get().getPosts()) {
 726                                         if (post.getTime() < now) {
 727                                                 markPostKnown(post);
 728                                         }
 729                                 }
 730                                 for (PostReply reply : followedSone.get().getReplies()) {
 731                                         if (reply.getTime() < now) {
 732                                                 markReplyKnown(reply);
 733                                         }
 734                                 }
 735                         }
 736                 }
 737                 touchConfiguration();
 738         }
 739
 740         /**
 741          * Lets the given local Sone unfollow the Sone with the given ID.
 742          *
 743          * @param sone
 744          *            The local Sone that should unfollow another Sone
 745          * @param soneId
 746          *            The ID of the Sone being unfollowed
 747          */
 748         public void unfollowSone(Sone sone, String soneId) {
 749                 checkNotNull(sone, "sone must not be null");
 750                 checkNotNull(soneId, "soneId must not be null");
 751                 database.removeFriend(sone, soneId);
 752                 boolean unfollowedSoneStillFollowed = false;
 753                 for (Sone localSone : getLocalSones()) {
 754                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 755                 }
 756                 if (!unfollowedSoneStillFollowed) {
 757                         synchronized (soneFollowingTimes) {
 758                                 soneFollowingTimes.remove(soneId);
 759                         }
 760                 }
 761                 touchConfiguration();
 762         }
 763
 764         /**
 765          * Sets the trust value of the given origin Sone for the target Sone.
 766          *
 767          * @param origin
 768          *            The origin Sone
 769          * @param target
 770          *            The target Sone
 771          * @param trustValue
 772          *            The trust value (from {@code -100} to {@code 100})
 773          */
 774         public void setTrust(Sone origin, Sone target, int trustValue) {
 775                 checkNotNull(origin, "origin must not be null");
 776                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 777                 checkNotNull(target, "target must not be null");
 778                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 779                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 780         }
 781
 782         /**
 783          * Removes any trust assignment for the given target Sone.
 784          *
 785          * @param origin
 786          *            The trust origin
 787          * @param target
 788          *            The trust target
 789          */
 790         public void removeTrust(Sone origin, Sone target) {
 791                 checkNotNull(origin, "origin must not be null");
 792                 checkNotNull(target, "target must not be null");
 793                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 794                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 795         }
 796
 797         /**
 798          * Assigns the configured positive trust value for the given target.
 799          *
 800          * @param origin
 801          *            The trust origin
 802          * @param target
 803          *            The trust target
 804          */
 805         public void trustSone(Sone origin, Sone target) {
 806                 setTrust(origin, target, preferences.getPositiveTrust());
 807         }
 808
 809         /**
 810          * Assigns the configured negative trust value for the given target.
 811          *
 812          * @param origin
 813          *            The trust origin
 814          * @param target
 815          *            The trust target
 816          */
 817         public void distrustSone(Sone origin, Sone target) {
 818                 setTrust(origin, target, preferences.getNegativeTrust());
 819         }
 820
 821         /**
 822          * Removes the trust assignment for the given target.
 823          *
 824          * @param origin
 825          *            The trust origin
 826          * @param target
 827          *            The trust target
 828          */
 829         public void untrustSone(Sone origin, Sone target) {
 830                 removeTrust(origin, target);
 831         }
 832
 833         /**
 834          * Updates the stored Sone with the given Sone.
 835          *
 836          * @param sone
 837          *            The updated Sone
 838          */
 839         public void updateSone(Sone sone) {
 840                 updateSone(sone, false);
 841         }
 842
 843         /**
 844          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 845          * {@code true}, an older Sone than the current Sone can be given to restore
 846          * an old state.
 847          *
 848          * @param sone
 849          *            The Sone to update
 850          * @param soneRescueMode
 851          *            {@code true} if the stored Sone should be updated regardless
 852          *            of the age of the given Sone
 853          */
 854         public void updateSone(final Sone sone, boolean soneRescueMode) {
 855                 Optional<Sone> storedSone = getSone(sone.getId());
 856                 if (storedSone.isPresent()) {
 857                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 858                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 859                                 return;
 860                         }
 861                         List<Object> events =
 862                                         collectEventsForChangesInSone(storedSone.get(), sone);
 863                         database.storeSone(sone);
 864                         for (Object event : events) {
 865                                 eventBus.post(event);
 866                         }
 867                         sone.setOptions(storedSone.get().getOptions());
 868                         sone.setKnown(storedSone.get().isKnown());
 869                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 870                         if (sone.isLocal()) {
 871                                 touchConfiguration();
 872                         }
 873                 }
 874         }
 875
 876         private List<Object> collectEventsForChangesInSone(Sone oldSone,
 877                         final Sone newSone) {
 878                 final List<Object> events = new ArrayList<Object>();
 879                 SoneChangeDetector soneChangeDetector = new SoneChangeDetector(
 880                                 oldSone);
 881                 soneChangeDetector.onNewPosts(new PostProcessor() {
 882                         @Override
 883                         public void processPost(Post post) {
 884                                 if (post.getTime() < getSoneFollowingTime(newSone)) {
 885                                         post.setKnown(true);
 886                                 } else if (!post.isKnown()) {
 887                                         events.add(new NewPostFoundEvent(post));
 888                                 }
 889                         }
 890                 });
 891                 soneChangeDetector.onRemovedPosts(new PostProcessor() {
 892                         @Override
 893                         public void processPost(Post post) {
 894                                 events.add(new PostRemovedEvent(post));
 895                         }
 896                 });
 897                 soneChangeDetector.onNewPostReplies(new PostReplyProcessor() {
 898                         @Override
 899                         public void processPostReply(PostReply postReply) {
 900                                 if (postReply.getTime() < getSoneFollowingTime(newSone)) {
 901                                         postReply.setKnown(true);
 902                                 } else if (!postReply.isKnown()) {
 903                                         events.add(new NewPostReplyFoundEvent(postReply));
 904                                 }
 905                         }
 906                 });
 907                 soneChangeDetector.onRemovedPostReplies(new PostReplyProcessor() {
 908                         @Override
 909                         public void processPostReply(PostReply postReply) {
 910                                 events.add(new PostReplyRemovedEvent(postReply));
 911                         }
 912                 });
 913                 soneChangeDetector.detectChanges(newSone);
 914                 return events;
 915         }
 916
 917         /**
 918          * Deletes the given Sone. This will remove the Sone from the
 919          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 920          * remove the context from its identity.
 921          *
 922          * @param sone
 923          *            The Sone to delete
 924          */
 925         public void deleteSone(Sone sone) {
 926                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 927                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 928                         return;
 929                 }
 930                 if (!getLocalSones().contains(sone)) {
 931                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 932                         return;
 933                 }
 934                 SoneInserter soneInserter = soneInserters.remove(sone);
 935                 soneInserter.stop();
 936                 database.removeSone(sone);
 937                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 938                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 939                 try {
 940                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 941                 } catch (ConfigurationException ce1) {
 942                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 943                 }
 944         }
 945
 946         /**
 947          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 948          * known} before, a {@link MarkSoneKnownEvent} is fired.
 949          *
 950          * @param sone
 951          *            The Sone to mark as known
 952          */
 953         public void markSoneKnown(Sone sone) {
 954                 if (!sone.isKnown()) {
 955                         sone.setKnown(true);
 956                         synchronized (knownSones) {
 957                                 knownSones.add(sone.getId());
 958                         }
 959                         eventBus.post(new MarkSoneKnownEvent(sone));
 960                         touchConfiguration();
 961                 }
 962         }
 963
 964         /**
 965          * Creates a new post.
 966          *
 967          * @param sone
 968          *            The Sone that creates the post
 969          * @param recipient
 970          *            The recipient Sone, or {@code null} if this post does not have
 971          *            a recipient
 972          * @param text
 973          *            The text of the post
 974          * @return The created post
 975          */
 976         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
 977                 checkNotNull(text, "text must not be null");
 978                 checkArgument(text.trim().length() > 0, "text must not be empty");
 979                 if (!sone.isLocal()) {
 980                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
 981                         return null;
 982                 }
 983                 PostBuilder postBuilder = database.newPostBuilder();
 984                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
 985                 if (recipient.isPresent()) {
 986                         postBuilder.to(recipient.get().getId());
 987                 }
 988                 final Post post = postBuilder.build();
 989                 database.storePost(post);
 990                 eventBus.post(new NewPostFoundEvent(post));
 991                 sone.addPost(post);
 992                 touchConfiguration();
 993                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
 994                 return post;
 995         }
 996
 997         /**
 998          * Deletes the given post.
 999          *
1000          * @param post
1001          *            The post to delete
1002          */
1003         public void deletePost(Post post) {
1004                 if (!post.getSone().isLocal()) {
1005                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1006                         return;
1007                 }
1008                 database.removePost(post);
1009                 eventBus.post(new PostRemovedEvent(post));
1010                 markPostKnown(post);
1011                 touchConfiguration();
1012         }
1013
1014         /**
1015          * Marks the given post as known, if it is currently not a known post
1016          * (according to {@link Post#isKnown()}).
1017          *
1018          * @param post
1019          *            The post to mark as known
1020          */
1021         public void markPostKnown(Post post) {
1022                 post.setKnown(true);
1023                 eventBus.post(new MarkPostKnownEvent(post));
1024                 touchConfiguration();
1025                 for (PostReply reply : getReplies(post.getId())) {
1026                         markReplyKnown(reply);
1027                 }
1028         }
1029
1030         public void bookmarkPost(Post post) {
1031                 database.bookmarkPost(post);
1032         }
1033
1034         /**
1035          * Removes the given post from the bookmarks.
1036          *
1037          * @param post
1038          *            The post to unbookmark
1039          */
1040         public void unbookmarkPost(Post post) {
1041                 database.unbookmarkPost(post);
1042         }
1043
1044         /**
1045          * Creates a new reply.
1046          *
1047          * @param sone
1048          *            The Sone that creates the reply
1049          * @param post
1050          *            The post that this reply refers to
1051          * @param text
1052          *            The text of the reply
1053          * @return The created reply
1054          */
1055         public PostReply createReply(Sone sone, Post post, String text) {
1056                 checkNotNull(text, "text must not be null");
1057                 checkArgument(text.trim().length() > 0, "text must not be empty");
1058                 if (!sone.isLocal()) {
1059                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1060                         return null;
1061                 }
1062                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1063                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1064                 final PostReply reply = postReplyBuilder.build();
1065                 database.storePostReply(reply);
1066                 eventBus.post(new NewPostReplyFoundEvent(reply));
1067                 sone.addReply(reply);
1068                 touchConfiguration();
1069                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1070                 return reply;
1071         }
1072
1073         /**
1074          * Deletes the given reply.
1075          *
1076          * @param reply
1077          *            The reply to delete
1078          */
1079         public void deleteReply(PostReply reply) {
1080                 Sone sone = reply.getSone();
1081                 if (!sone.isLocal()) {
1082                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1083                         return;
1084                 }
1085                 database.removePostReply(reply);
1086                 markReplyKnown(reply);
1087                 sone.removeReply(reply);
1088                 touchConfiguration();
1089         }
1090
1091         /**
1092          * Marks the given reply as known, if it is currently not a known reply
1093          * (according to {@link Reply#isKnown()}).
1094          *
1095          * @param reply
1096          *            The reply to mark as known
1097          */
1098         public void markReplyKnown(PostReply reply) {
1099                 boolean previouslyKnown = reply.isKnown();
1100                 reply.setKnown(true);
1101                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1102                 if (!previouslyKnown) {
1103                         touchConfiguration();
1104                 }
1105         }
1106
1107         /**
1108          * Creates a new album for the given Sone.
1109          *
1110          * @param sone
1111          *            The Sone to create the album for
1112          * @param parent
1113          *            The parent of the album (may be {@code null} to create a
1114          *            top-level album)
1115          * @return The new album
1116          */
1117         public Album createAlbum(Sone sone, Album parent) {
1118                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1119                 database.storeAlbum(album);
1120                 parent.addAlbum(album);
1121                 return album;
1122         }
1123
1124         /**
1125          * Deletes the given album. The owner of the album has to be a local Sone,
1126          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1127          *
1128          * @param album
1129          *            The album to remove
1130          */
1131         public void deleteAlbum(Album album) {
1132                 checkNotNull(album, "album must not be null");
1133                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1134                 if (!album.isEmpty()) {
1135                         return;
1136                 }
1137                 album.getParent().removeAlbum(album);
1138                 database.removeAlbum(album);
1139                 touchConfiguration();
1140         }
1141
1142         /**
1143          * Creates a new image.
1144          *
1145          * @param sone
1146          *            The Sone creating the image
1147          * @param album
1148          *            The album the image will be inserted into
1149          * @param temporaryImage
1150          *            The temporary image to create the image from
1151          * @return The newly created image
1152          */
1153         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1154                 checkNotNull(sone, "sone must not be null");
1155                 checkNotNull(album, "album must not be null");
1156                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1157                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1158                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1159                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1160                 album.addImage(image);
1161                 database.storeImage(image);
1162                 imageInserter.insertImage(temporaryImage, image);
1163                 return image;
1164         }
1165
1166         /**
1167          * Deletes the given image. This method will also delete a matching
1168          * temporary image.
1169          *
1170          * @see #deleteTemporaryImage(String)
1171          * @param image
1172          *            The image to delete
1173          */
1174         public void deleteImage(Image image) {
1175                 checkNotNull(image, "image must not be null");
1176                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1177                 deleteTemporaryImage(image.getId());
1178                 image.getAlbum().removeImage(image);
1179                 database.removeImage(image);
1180                 touchConfiguration();
1181         }
1182
1183         /**
1184          * Creates a new temporary image.
1185          *
1186          * @param mimeType
1187          *            The MIME type of the temporary image
1188          * @param imageData
1189          *            The encoded data of the image
1190          * @return The temporary image
1191          */
1192         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1193                 TemporaryImage temporaryImage = new TemporaryImage();
1194                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1195                 synchronized (temporaryImages) {
1196                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1197                 }
1198                 return temporaryImage;
1199         }
1200
1201         /**
1202          * Deletes the temporary image with the given ID.
1203          *
1204          * @param imageId
1205          *            The ID of the temporary image to delete
1206          */
1207         public void deleteTemporaryImage(String imageId) {
1208                 checkNotNull(imageId, "imageId must not be null");
1209                 synchronized (temporaryImages) {
1210                         temporaryImages.remove(imageId);
1211                 }
1212                 Image image = getImage(imageId, false);
1213                 if (image != null) {
1214                         imageInserter.cancelImageInsert(image);
1215                 }
1216         }
1217
1218         /**
1219          * Notifies the core that the configuration, either of the core or of a
1220          * single local Sone, has changed, and that the configuration should be
1221          * saved.
1222          */
1223         public void touchConfiguration() {
1224                 lastConfigurationUpdate = System.currentTimeMillis();
1225         }
1226
1227         //
1228         // SERVICE METHODS
1229         //
1230
1231         /**
1232          * Starts the core.
1233          */
1234         @Override
1235         public void serviceStart() {
1236                 loadConfiguration();
1237                 updateChecker.start();
1238                 identityManager.start();
1239                 webOfTrustUpdater.init();
1240                 webOfTrustUpdater.start();
1241                 database.start();
1242         }
1243
1244         /**
1245          * {@inheritDoc}
1246          */
1247         @Override
1248         public void serviceRun() {
1249                 long lastSaved = System.currentTimeMillis();
1250                 while (!shouldStop()) {
1251                         sleep(1000);
1252                         long now = System.currentTimeMillis();
1253                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1254                                 saveConfiguration();
1255                                 lastSaved = now;
1256                         }
1257                 }
1258         }
1259
1260         /**
1261          * Stops the core.
1262          */
1263         @Override
1264         public void serviceStop() {
1265                 localElementTicker.shutdownNow();
1266                 synchronized (soneInserters) {
1267                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1268                                 soneInserter.getValue().stop();
1269                         }
1270                 }
1271                 database.stop();
1272                 saveConfiguration();
1273                 webOfTrustUpdater.stop();
1274                 updateChecker.stop();
1275                 soneDownloader.stop();
1276                 soneDownloaders.shutdown();
1277                 identityManager.stop();
1278         }
1279
1280         //
1281         // PRIVATE METHODS
1282         //
1283
1284         /**
1285          * Saves the current options.
1286          */
1287         private void saveConfiguration() {
1288                 synchronized (configuration) {
1289                         if (storingConfiguration) {
1290                                 logger.log(Level.FINE, "Already storing configuration…");
1291                                 return;
1292                         }
1293                         storingConfiguration = true;
1294                 }
1295
1296                 /* store the options first. */
1297                 try {
1298                         preferences.saveTo(configuration);
1299
1300                         /* save known Sones. */
1301                         int soneCounter = 0;
1302                         synchronized (knownSones) {
1303                                 for (String knownSoneId : knownSones) {
1304                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1305                                 }
1306                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1307                         }
1308
1309                         /* save Sone following times. */
1310                         soneCounter = 0;
1311                         synchronized (soneFollowingTimes) {
1312                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1313                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1314                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1315                                         ++soneCounter;
1316                                 }
1317                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1318                         }
1319
1320                         /* save known posts. */
1321                         database.save();
1322
1323                         /* now save it. */
1324                         configuration.save();
1325
1326                 } catch (ConfigurationException ce1) {
1327                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1328                 } catch (DatabaseException de1) {
1329                         logger.log(Level.SEVERE, "Could not save database!", de1);
1330                 } finally {
1331                         synchronized (configuration) {
1332                                 storingConfiguration = false;
1333                         }
1334                 }
1335         }
1336
1337         /**
1338          * Loads the configuration.
1339          */
1340         private void loadConfiguration() {
1341                 new PreferencesLoader(preferences).loadFrom(configuration);
1342
1343                 /* load known Sones. */
1344                 int soneCounter = 0;
1345                 while (true) {
1346                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1347                         if (knownSoneId == null) {
1348                                 break;
1349                         }
1350                         synchronized (knownSones) {
1351                                 knownSones.add(knownSoneId);
1352                         }
1353                 }
1354
1355                 /* load Sone following times. */
1356                 soneCounter = 0;
1357                 while (true) {
1358                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
1359                         if (soneId == null) {
1360                                 break;
1361                         }
1362                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
1363                         synchronized (soneFollowingTimes) {
1364                                 soneFollowingTimes.put(soneId, time);
1365                         }
1366                         ++soneCounter;
1367                 }
1368         }
1369
1370         /**
1371          * Notifies the core that a new {@link OwnIdentity} was added.
1372          *
1373          * @param ownIdentityAddedEvent
1374          *            The event
1375          */
1376         @Subscribe
1377         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1378                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1379                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1380                 if (ownIdentity.hasContext("Sone")) {
1381                         addLocalSone(ownIdentity);
1382                 }
1383         }
1384
1385         /**
1386          * Notifies the core that an {@link OwnIdentity} was removed.
1387          *
1388          * @param ownIdentityRemovedEvent
1389          *            The event
1390          */
1391         @Subscribe
1392         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1393                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1394                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1395                 trustedIdentities.removeAll(ownIdentity);
1396         }
1397
1398         /**
1399          * Notifies the core that a new {@link Identity} was added.
1400          *
1401          * @param identityAddedEvent
1402          *            The event
1403          */
1404         @Subscribe
1405         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1406                 Identity identity = identityAddedEvent.identity();
1407                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1408                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1409                 addRemoteSone(identity);
1410         }
1411
1412         /**
1413          * Notifies the core that an {@link Identity} was updated.
1414          *
1415          * @param identityUpdatedEvent
1416          *            The event
1417          */
1418         @Subscribe
1419         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1420                 Identity identity = identityUpdatedEvent.identity();
1421                 final Sone sone = getRemoteSone(identity.getId());
1422                 if (sone.isLocal()) {
1423                         return;
1424                 }
1425                 sone.setLatestEdition(fromNullable(tryParse(identity.getProperty("Sone.LatestEdition"))).or(sone.getLatestEdition()));
1426                 soneDownloader.addSone(sone);
1427                 soneDownloaders.execute(soneDownloader.fetchSoneAction(sone));
1428         }
1429
1430         /**
1431          * Notifies the core that an {@link Identity} was removed.
1432          *
1433          * @param identityRemovedEvent
1434          *            The event
1435          */
1436         @Subscribe
1437         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1438                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1439                 Identity identity = identityRemovedEvent.identity();
1440                 trustedIdentities.remove(ownIdentity, identity);
1441                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1442                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1443                                 continue;
1444                         }
1445                         if (trustedIdentity.getValue().contains(identity)) {
1446                                 return;
1447                         }
1448                 }
1449                 Optional<Sone> sone = getSone(identity.getId());
1450                 if (!sone.isPresent()) {
1451                         /* TODO - we don’t have the Sone anymore. should this happen? */
1452                         return;
1453                 }
1454                 database.removeSone(sone.get());
1455                 eventBus.post(new SoneRemovedEvent(sone.get()));
1456         }
1457
1458         @Subscribe
1459         public void soneInserted(SoneInsertedEvent soneInsertedEvent) {
1460                 Sone sone = soneInsertedEvent.sone();
1461                 database.setLastInsertFingerprint(sone, soneInsertedEvent.insertFingerprint());
1462                 webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(
1463                                 sone.getLatestEdition()));
1464         }
1465
1466         /**
1467          * Deletes the temporary image.
1468          *
1469          * @param imageInsertFinishedEvent
1470          *            The event
1471          */
1472         @Subscribe
1473         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1474                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
1475                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
1476                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
1477                 touchConfiguration();
1478         }
1479
1480         @VisibleForTesting
1481         class MarkPostKnown implements Runnable {
1482
1483                 private final Post post;
1484
1485                 public MarkPostKnown(Post post) {
1486                         this.post = post;
1487                 }
1488
1489                 @Override
1490                 public void run() {
1491                         markPostKnown(post);
1492                 }
1493
1494         }
1495
1496         @VisibleForTesting
1497         class MarkReplyKnown implements Runnable {
1498
1499                 private final PostReply postReply;
1500
1501                 public MarkReplyKnown(PostReply postReply) {
1502                         this.postReply = postReply;
1503                 }
1504
1505                 @Override
1506                 public void run() {
1507                         markReplyKnown(postReply);
1508                 }
1509
1510         }
1511
1512 }