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

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.core;
  19
  20 import static com.google.common.base.Optional.fromNullable;
  21 import static com.google.common.base.Preconditions.checkArgument;
  22 import static com.google.common.base.Preconditions.checkNotNull;
  23 import static com.google.common.primitives.Longs.tryParse;
  24 import static java.util.logging.Logger.getLogger;
  25
  26 import java.util.ArrayList;
  27 import java.util.Collection;
  28 import java.util.HashMap;
  29 import java.util.HashSet;
  30 import java.util.List;
  31 import java.util.Map;
  32 import java.util.Map.Entry;
  33 import java.util.Set;
  34 import java.util.concurrent.ExecutorService;
  35 import java.util.concurrent.Executors;
  36 import java.util.concurrent.ScheduledExecutorService;
  37 import java.util.concurrent.TimeUnit;
  38 import java.util.logging.Level;
  39 import java.util.logging.Logger;
  40
  41 import net.pterodactylus.sone.core.SoneChangeDetector.PostProcessor;
  42 import net.pterodactylus.sone.core.SoneChangeDetector.PostReplyProcessor;
  43 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  44 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  45 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  46 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  47 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  48 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  49 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  50 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  51 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  52 import net.pterodactylus.sone.core.event.SoneInsertedEvent;
  53 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  54 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  55 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  56 import net.pterodactylus.sone.data.Album;
  57 import net.pterodactylus.sone.data.Image;
  58 import net.pterodactylus.sone.data.LocalSone;
  59 import net.pterodactylus.sone.data.Post;
  60 import net.pterodactylus.sone.data.PostReply;
  61 import net.pterodactylus.sone.data.Reply;
  62 import net.pterodactylus.sone.data.Sone;
  63 import net.pterodactylus.sone.data.Sone.SoneStatus;
  64 import net.pterodactylus.sone.data.TemporaryImage;
  65 import net.pterodactylus.sone.database.AlbumBuilder;
  66 import net.pterodactylus.sone.database.Database;
  67 import net.pterodactylus.sone.database.DatabaseException;
  68 import net.pterodactylus.sone.database.ImageBuilder;
  69 import net.pterodactylus.sone.database.PostBuilder;
  70 import net.pterodactylus.sone.database.PostProvider;
  71 import net.pterodactylus.sone.database.PostReplyBuilder;
  72 import net.pterodactylus.sone.database.PostReplyProvider;
  73 import net.pterodactylus.sone.database.SoneBuilder;
  74 import net.pterodactylus.sone.database.SoneProvider;
  75 import net.pterodactylus.sone.freenet.wot.Identity;
  76 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  77 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  78 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  83 import net.pterodactylus.util.config.Configuration;
  84 import net.pterodactylus.util.config.ConfigurationException;
  85 import net.pterodactylus.util.service.AbstractService;
  86 import net.pterodactylus.util.thread.NamedThreadFactory;
  87
  88 import com.google.common.annotations.VisibleForTesting;
  89 import com.google.common.base.Function;
  90 import com.google.common.base.Optional;
  91 import com.google.common.collect.HashMultimap;
  92 import com.google.common.collect.Multimap;
  93 import com.google.common.collect.Multimaps;
  94 import com.google.common.eventbus.EventBus;
  95 import com.google.common.eventbus.Subscribe;
  96 import com.google.inject.Inject;
  97 import com.google.inject.Singleton;
  98
  99 /**
 100  * The Sone core.
 101  *
 102  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 103  */
 104 @Singleton
 105 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 106
 107         /** The logger. */
 108         private static final Logger logger = getLogger("Sone.Core");
 109
 110         /** The start time. */
 111         private final long startupTime = System.currentTimeMillis();
 112
 113         /** The preferences. */
 114         private final Preferences preferences;
 115
 116         /** The event bus. */
 117         private final EventBus eventBus;
 118
 119         /** The configuration. */
 120         private final Configuration configuration;
 121
 122         /** Whether we’re currently saving the configuration. */
 123         private boolean storingConfiguration = false;
 124
 125         /** The identity manager. */
 126         private final IdentityManager identityManager;
 127
 128         /** Interface to freenet. */
 129         private final FreenetInterface freenetInterface;
 130
 131         /** The Sone downloader. */
 132         private final SoneDownloader soneDownloader;
 133
 134         /** The image inserter. */
 135         private final ImageInserter imageInserter;
 136
 137         /** Sone downloader thread-pool. */
 138         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 139
 140         /** The update checker. */
 141         private final UpdateChecker updateChecker;
 142
 143         /** The trust updater. */
 144         private final WebOfTrustUpdater webOfTrustUpdater;
 145
 146         /** The times Sones were followed. */
 147         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 148
 149         /** Locked local Sones. */
 150         /* synchronize on itself. */
 151         private final Set<LocalSone> lockedSones = new HashSet<LocalSone>();
 152
 153         /** Sone inserters. */
 154         /* synchronize access on this on sones. */
 155         private final Map<LocalSone, SoneInserter> soneInserters = new HashMap<LocalSone, SoneInserter>();
 156
 157         /** Sone rescuers. */
 158         /* synchronize access on this on sones. */
 159         private final Map<LocalSone, SoneRescuer> soneRescuers = new HashMap<LocalSone, SoneRescuer>();
 160
 161         /** The post database. */
 162         private final Database database;
 163
 164         /** Trusted identities, sorted by own identities. */
 165         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 166
 167         /** All temporary images. */
 168         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 169
 170         /** Ticker for threads that mark own elements as known. */
 171         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 172
 173         /** The time the configuration was last touched. */
 174         private volatile long lastConfigurationUpdate;
 175
 176         /**
 177          * Creates a new core.
 178          *
 179          * @param configuration
 180          *            The configuration of the core
 181          * @param freenetInterface
 182          *            The freenet interface
 183          * @param identityManager
 184          *            The identity manager
 185          * @param webOfTrustUpdater
 186          *            The WebOfTrust updater
 187          * @param eventBus
 188          *            The event bus
 189          * @param database
 190          *            The database
 191          */
 192         @Inject
 193         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 194                 super("Sone Core");
 195                 this.configuration = configuration;
 196                 this.freenetInterface = freenetInterface;
 197                 this.identityManager = identityManager;
 198                 this.soneDownloader = new SoneDownloaderImpl(this, freenetInterface);
 199                 this.imageInserter = new ImageInserter(freenetInterface, freenetInterface.new InsertTokenSupplier());
 200                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 201                 this.webOfTrustUpdater = webOfTrustUpdater;
 202                 this.eventBus = eventBus;
 203                 this.database = database;
 204                 preferences = new Preferences(eventBus);
 205         }
 206
 207         @VisibleForTesting
 208         protected Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 209                 super("Sone Core");
 210                 this.configuration = configuration;
 211                 this.freenetInterface = freenetInterface;
 212                 this.identityManager = identityManager;
 213                 this.soneDownloader = soneDownloader;
 214                 this.imageInserter = imageInserter;
 215                 this.updateChecker = updateChecker;
 216                 this.webOfTrustUpdater = webOfTrustUpdater;
 217                 this.eventBus = eventBus;
 218                 this.database = database;
 219                 preferences = new Preferences(eventBus);
 220         }
 221
 222         //
 223         // ACCESSORS
 224         //
 225
 226         /**
 227          * Returns the time Sone was started.
 228          *
 229          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 230          */
 231         public long getStartupTime() {
 232                 return startupTime;
 233         }
 234
 235         /**
 236          * Returns the options used by the core.
 237          *
 238          * @return The options of the core
 239          */
 240         public Preferences getPreferences() {
 241                 return preferences;
 242         }
 243
 244         /**
 245          * Returns the identity manager used by the core.
 246          *
 247          * @return The identity manager
 248          */
 249         public IdentityManager getIdentityManager() {
 250                 return identityManager;
 251         }
 252
 253         /**
 254          * Returns the update checker.
 255          *
 256          * @return The update checker
 257          */
 258         public UpdateChecker getUpdateChecker() {
 259                 return updateChecker;
 260         }
 261
 262         /**
 263          * Returns the Sone rescuer for the given local Sone.
 264          *
 265          * @param sone
 266          *            The local Sone to get the rescuer for
 267          * @return The Sone rescuer for the given Sone
 268          */
 269         public SoneRescuer getSoneRescuer(LocalSone sone) {
 270                 checkNotNull(sone, "sone must not be null");
 271                 synchronized (soneRescuers) {
 272                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 273                         if (soneRescuer == null) {
 274                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 275                                 soneRescuers.put(sone, soneRescuer);
 276                                 soneRescuer.start();
 277                         }
 278                         return soneRescuer;
 279                 }
 280         }
 281
 282         /**
 283          * Returns whether the given Sone is currently locked.
 284          *
 285          * @param sone
 286          *            The sone to check
 287          * @return {@code true} if the Sone is locked, {@code false} if it is not
 288          */
 289         public boolean isLocked(LocalSone sone) {
 290                 synchronized (lockedSones) {
 291                         return lockedSones.contains(sone);
 292                 }
 293         }
 294
 295         public SoneBuilder soneBuilder() {
 296                 return database.newSoneBuilder();
 297         }
 298
 299         /**
 300          * {@inheritDocs}
 301          */
 302         @Override
 303         public Collection<Sone> getSones() {
 304                 return database.getSones();
 305         }
 306
 307         @Override
 308         public Function<String, Optional<Sone>> soneLoader() {
 309                 return database.soneLoader();
 310         }
 311
 312         /**
 313          * Returns the Sone with the given ID, regardless whether it’s local or
 314          * remote.
 315          *
 316          * @param id
 317          *            The ID of the Sone to get
 318          * @return The Sone with the given ID, or {@code null} if there is no such
 319          *         Sone
 320          */
 321         @Override
 322         public Optional<Sone> getSone(String id) {
 323                 return database.getSone(id);
 324         }
 325
 326         @Override
 327         public Collection<LocalSone> getLocalSones() {
 328                 return database.getLocalSones();
 329         }
 330
 331         public Optional<LocalSone> getLocalSone(String id) {
 332                 return database.getLocalSone(id);
 333         }
 334
 335         /**
 336          * {@inheritDocs}
 337          */
 338         @Override
 339         public Collection<Sone> getRemoteSones() {
 340                 return database.getRemoteSones();
 341         }
 342
 343         /**
 344          * Returns the remote Sone with the given ID.
 345          *
 346          *
 347          * @param id
 348          *            The ID of the remote Sone to get
 349          * @return The Sone with the given ID
 350          */
 351         public Sone getRemoteSone(String id) {
 352                 return database.getSone(id).orNull();
 353         }
 354
 355         /**
 356          * Returns whether the given Sone has been modified.
 357          *
 358          * @param sone
 359          *            The Sone to check for modifications
 360          * @return {@code true} if a modification has been detected in the Sone,
 361          *         {@code false} otherwise
 362          */
 363         public boolean isModifiedSone(LocalSone sone) {
 364                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 365         }
 366
 367         /**
 368          * Returns the time when the given was first followed by any local Sone.
 369          *
 370          * @param sone
 371          *            The Sone to get the time for
 372          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 373          *         been followed, or {@link Long#MAX_VALUE}
 374          */
 375         public long getSoneFollowingTime(Sone sone) {
 376                 synchronized (soneFollowingTimes) {
 377                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 378                 }
 379         }
 380
 381         /**
 382          * Returns a post builder.
 383          *
 384          * @return A new post builder
 385          */
 386         public PostBuilder postBuilder() {
 387                 return database.newPostBuilder();
 388         }
 389
 390         /**
 391          * {@inheritDoc}
 392          */
 393         @Override
 394         public Optional<Post> getPost(String postId) {
 395                 return database.getPost(postId);
 396         }
 397
 398         /**
 399          * {@inheritDocs}
 400          */
 401         @Override
 402         public Collection<Post> getPosts(String soneId) {
 403                 return database.getPosts(soneId);
 404         }
 405
 406         /**
 407          * {@inheritDoc}
 408          */
 409         @Override
 410         public Collection<Post> getDirectedPosts(final String recipientId) {
 411                 checkNotNull(recipientId, "recipient must not be null");
 412                 return database.getDirectedPosts(recipientId);
 413         }
 414
 415         /**
 416          * Returns a post reply builder.
 417          *
 418          * @return A new post reply builder
 419          */
 420         public PostReplyBuilder postReplyBuilder() {
 421                 return database.newPostReplyBuilder();
 422         }
 423
 424         /**
 425          * {@inheritDoc}
 426          */
 427         @Override
 428         public Optional<PostReply> getPostReply(String replyId) {
 429                 return database.getPostReply(replyId);
 430         }
 431
 432         /**
 433          * {@inheritDoc}
 434          */
 435         @Override
 436         public List<PostReply> getReplies(final String postId) {
 437                 return database.getReplies(postId);
 438         }
 439
 440         /**
 441          * Returns all Sones that have liked the given post.
 442          *
 443          * @param post
 444          *            The post to get the liking Sones for
 445          * @return The Sones that like the given post
 446          */
 447         public Set<Sone> getLikes(Post post) {
 448                 Set<Sone> sones = new HashSet<Sone>();
 449                 for (Sone sone : getSones()) {
 450                         if (sone.getLikedPostIds().contains(post.getId())) {
 451                                 sones.add(sone);
 452                         }
 453                 }
 454                 return sones;
 455         }
 456
 457         /**
 458          * Returns all Sones that have liked the given reply.
 459          *
 460          * @param reply
 461          *            The reply to get the liking Sones for
 462          * @return The Sones that like the given reply
 463          */
 464         public Set<Sone> getLikes(PostReply reply) {
 465                 Set<Sone> sones = new HashSet<Sone>();
 466                 for (Sone sone : getSones()) {
 467                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 468                                 sones.add(sone);
 469                         }
 470                 }
 471                 return sones;
 472         }
 473
 474         /**
 475          * Returns whether the given post is bookmarked.
 476          *
 477          * @param post
 478          *            The post to check
 479          * @return {@code true} if the given post is bookmarked, {@code false}
 480          *         otherwise
 481          */
 482         public boolean isBookmarked(Post post) {
 483                 return database.isPostBookmarked(post);
 484         }
 485
 486         /**
 487          * Returns all currently known bookmarked posts.
 488          *
 489          * @return All bookmarked posts
 490          */
 491         public Set<Post> getBookmarkedPosts() {
 492                 return database.getBookmarkedPosts();
 493         }
 494
 495         public AlbumBuilder albumBuilder() {
 496                 return database.newAlbumBuilder();
 497         }
 498
 499         /**
 500          * Returns the album with the given ID, optionally creating a new album if
 501          * an album with the given ID can not be found.
 502          *
 503          * @param albumId
 504          *            The ID of the album
 505          * @return The album with the given ID, or {@code null} if no album with the
 506          *         given ID exists
 507          */
 508         public Album getAlbum(String albumId) {
 509                 return database.getAlbum(albumId).orNull();
 510         }
 511
 512         public ImageBuilder imageBuilder() {
 513                 return database.newImageBuilder();
 514         }
 515
 516         /**
 517          * Returns the image with the given ID, creating it if necessary.
 518          *
 519          * @param imageId
 520          *            The ID of the image
 521          * @return The image with the given ID
 522          */
 523         public Image getImage(String imageId) {
 524                 return getImage(imageId, true);
 525         }
 526
 527         /**
 528          * Returns the image with the given ID, optionally creating it if it does
 529          * not exist.
 530          *
 531          * @param imageId
 532          *            The ID of the image
 533          * @param create
 534          *            {@code true} to create an image if none exists with the given
 535          *            ID
 536          * @return The image with the given ID, or {@code null} if none exists and
 537          *         none was created
 538          */
 539         public Image getImage(String imageId, boolean create) {
 540                 Optional<Image> image = database.getImage(imageId);
 541                 if (image.isPresent()) {
 542                         return image.get();
 543                 }
 544                 if (!create) {
 545                         return null;
 546                 }
 547                 Image newImage = database.newImageBuilder().withId(imageId).build();
 548                 database.storeImage(newImage);
 549                 return newImage;
 550         }
 551
 552         /**
 553          * Returns the temporary image with the given ID.
 554          *
 555          * @param imageId
 556          *            The ID of the temporary image
 557          * @return The temporary image, or {@code null} if there is no temporary
 558          *         image with the given ID
 559          */
 560         public TemporaryImage getTemporaryImage(String imageId) {
 561                 synchronized (temporaryImages) {
 562                         return temporaryImages.get(imageId);
 563                 }
 564         }
 565
 566         //
 567         // ACTIONS
 568         //
 569
 570         /**
 571          * Locks the given Sone. A locked Sone will not be inserted by
 572          * {@link SoneInserter} until it is {@link #unlockSone(LocalSone) unlocked}
 573          * again.
 574          *
 575          * @param sone
 576          *            The sone to lock
 577          */
 578         public void lockSone(LocalSone sone) {
 579                 synchronized (lockedSones) {
 580                         if (lockedSones.add(sone)) {
 581                                 eventBus.post(new SoneLockedEvent(sone));
 582                         }
 583                 }
 584         }
 585
 586         /**
 587          * Unlocks the given Sone.
 588          *
 589          * @see #lockSone(LocalSone)
 590          * @param sone
 591          *            The sone to unlock
 592          */
 593         public void unlockSone(LocalSone sone) {
 594                 synchronized (lockedSones) {
 595                         if (lockedSones.remove(sone)) {
 596                                 eventBus.post(new SoneUnlockedEvent(sone));
 597                         }
 598                 }
 599         }
 600
 601         /**
 602          * Adds a local Sone from the given own identity.
 603          *
 604          * @param ownIdentity
 605          *            The own identity to create a Sone from
 606          * @return The added (or already existing) Sone
 607          */
 608         public LocalSone addLocalSone(OwnIdentity ownIdentity) {
 609                 if (ownIdentity == null) {
 610                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 611                         return null;
 612                 }
 613                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 614                 LocalSone sone = database.registerLocalSone(ownIdentity);
 615                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, ownIdentity.getId());
 616                 eventBus.register(soneInserter);
 617                 synchronized (soneInserters) {
 618                         soneInserters.put(sone, soneInserter);
 619                 }
 620                 synchronized (soneInserters) {
 621                         soneInserters.get(sone).setLastInsertFingerprint(database.getLastInsertFingerprint(sone));
 622                 }
 623                 sone.setStatus(SoneStatus.idle);
 624                 soneInserter.start();
 625                 return sone;
 626         }
 627
 628         /**
 629          * Creates a new Sone for the given own identity.
 630          *
 631          * @param ownIdentity
 632          *            The own identity to create a Sone for
 633          * @return The created Sone
 634          */
 635         public Sone createSone(OwnIdentity ownIdentity) {
 636                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 637                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 638                         return null;
 639                 }
 640                 LocalSone sone = addLocalSone(ownIdentity);
 641
 642                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 643                 touchConfiguration();
 644                 return sone;
 645         }
 646
 647         /**
 648          * Adds the Sone of the given identity.
 649          *
 650          * @param identity
 651          *            The identity whose Sone to add
 652          * @return The added or already existing Sone
 653          */
 654         public Sone addRemoteSone(Identity identity) {
 655                 if (identity == null) {
 656                         logger.log(Level.WARNING, "Given Identity is null!");
 657                         return null;
 658                 }
 659                 final Long latestEdition = tryParse(fromNullable(
 660                                 identity.getProperty("Sone.LatestEdition")).or("0"));
 661                 Optional<Sone> existingSone = getSone(identity.getId());
 662                 if (existingSone.isPresent() && existingSone.get().isLocal()) {
 663                         return existingSone.get();
 664                 }
 665                 boolean newSone = !existingSone.isPresent();
 666                 Sone sone = !newSone ? existingSone.get() : database.newSoneBuilder().from(identity).build();
 667                 sone.setLatestEdition(latestEdition);
 668                 if (newSone) {
 669                         newSone = !database.isSoneKnown(sone);
 670                         sone.setKnown(!newSone);
 671                         if (newSone) {
 672                                 eventBus.post(new NewSoneFoundEvent(sone));
 673                                 for (LocalSone localSone : getLocalSones()) {
 674                                         if (localSone.getOptions().isAutoFollow()) {
 675                                                 followSone(localSone, sone.getId());
 676                                         }
 677                                 }
 678                         }
 679                 }
 680                 database.storeSone(sone);
 681                 soneDownloader.addSone(sone);
 682                 soneDownloaders.execute(soneDownloader.fetchSoneWithUriAction(sone));
 683                 return sone;
 684         }
 685
 686         /**
 687          * Lets the given local Sone follow the Sone with the given ID.
 688          *
 689          * @param sone
 690          *            The local Sone that should follow another Sone
 691          * @param soneId
 692          *            The ID of the Sone to follow
 693          */
 694         public void followSone(LocalSone sone, String soneId) {
 695                 checkNotNull(sone, "sone must not be null");
 696                 checkNotNull(soneId, "soneId must not be null");
 697                 database.addFriend(sone, soneId);
 698                 synchronized (soneFollowingTimes) {
 699                         if (!soneFollowingTimes.containsKey(soneId)) {
 700                                 long now = System.currentTimeMillis();
 701                                 soneFollowingTimes.put(soneId, now);
 702                                 Optional<Sone> followedSone = getSone(soneId);
 703                                 if (!followedSone.isPresent()) {
 704                                         return;
 705                                 }
 706                                 for (Post post : followedSone.get().getPosts()) {
 707                                         if (post.getTime() < now) {
 708                                                 markPostKnown(post);
 709                                         }
 710                                 }
 711                                 for (PostReply reply : followedSone.get().getReplies()) {
 712                                         if (reply.getTime() < now) {
 713                                                 markReplyKnown(reply);
 714                                         }
 715                                 }
 716                         }
 717                 }
 718                 touchConfiguration();
 719         }
 720
 721         /**
 722          * Lets the given local Sone unfollow the Sone with the given ID.
 723          *
 724          * @param sone
 725          *            The local Sone that should unfollow another Sone
 726          * @param soneId
 727          *            The ID of the Sone being unfollowed
 728          */
 729         public void unfollowSone(LocalSone sone, String soneId) {
 730                 checkNotNull(sone, "sone must not be null");
 731                 checkNotNull(soneId, "soneId must not be null");
 732                 database.removeFriend(sone, soneId);
 733                 boolean unfollowedSoneStillFollowed = false;
 734                 for (Sone localSone : getLocalSones()) {
 735                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 736                 }
 737                 if (!unfollowedSoneStillFollowed) {
 738                         synchronized (soneFollowingTimes) {
 739                                 soneFollowingTimes.remove(soneId);
 740                         }
 741                 }
 742                 touchConfiguration();
 743         }
 744
 745         /**
 746          * Sets the trust value of the given origin Sone for the target Sone.
 747          *
 748          * @param origin
 749          *            The origin Sone
 750          * @param target
 751          *            The target Sone
 752          * @param trustValue
 753          *            The trust value (from {@code -100} to {@code 100})
 754          */
 755         public void setTrust(Sone origin, Sone target, int trustValue) {
 756                 checkNotNull(origin, "origin must not be null");
 757                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 758                 checkNotNull(target, "target must not be null");
 759                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 760                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 761         }
 762
 763         /**
 764          * Removes any trust assignment for the given target Sone.
 765          *
 766          * @param origin
 767          *            The trust origin
 768          * @param target
 769          *            The trust target
 770          */
 771         public void removeTrust(Sone origin, Sone target) {
 772                 checkNotNull(origin, "origin must not be null");
 773                 checkNotNull(target, "target must not be null");
 774                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 775                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 776         }
 777
 778         /**
 779          * Assigns the configured positive trust value for the given target.
 780          *
 781          * @param origin
 782          *            The trust origin
 783          * @param target
 784          *            The trust target
 785          */
 786         public void trustSone(Sone origin, Sone target) {
 787                 setTrust(origin, target, preferences.getPositiveTrust());
 788         }
 789
 790         /**
 791          * Assigns the configured negative trust value for the given target.
 792          *
 793          * @param origin
 794          *            The trust origin
 795          * @param target
 796          *            The trust target
 797          */
 798         public void distrustSone(Sone origin, Sone target) {
 799                 setTrust(origin, target, preferences.getNegativeTrust());
 800         }
 801
 802         /**
 803          * Removes the trust assignment for the given target.
 804          *
 805          * @param origin
 806          *            The trust origin
 807          * @param target
 808          *            The trust target
 809          */
 810         public void untrustSone(Sone origin, Sone target) {
 811                 removeTrust(origin, target);
 812         }
 813
 814         /**
 815          * Updates the stored Sone with the given Sone.
 816          *
 817          * @param sone
 818          *            The updated Sone
 819          */
 820         public void updateSone(Sone sone) {
 821                 updateSone(sone, false);
 822         }
 823
 824         /**
 825          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 826          * {@code true}, an older Sone than the current Sone can be given to restore
 827          * an old state.
 828          *
 829          * @param sone
 830          *            The Sone to update
 831          * @param soneRescueMode
 832          *            {@code true} if the stored Sone should be updated regardless
 833          *            of the age of the given Sone
 834          */
 835         public void updateSone(final Sone sone, boolean soneRescueMode) {
 836                 Optional<Sone> storedSone = getSone(sone.getId());
 837                 if (storedSone.isPresent()) {
 838                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 839                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 840                                 return;
 841                         }
 842                         List<Object> events =
 843                                         collectEventsForChangesInSone(storedSone.get(), sone);
 844                         database.storeSone(sone);
 845                         for (Object event : events) {
 846                                 eventBus.post(event);
 847                         }
 848                         sone.setOptions(storedSone.get().getOptions());
 849                         sone.setKnown(storedSone.get().isKnown());
 850                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 851                         if (sone.isLocal()) {
 852                                 touchConfiguration();
 853                         }
 854                 }
 855         }
 856
 857         private List<Object> collectEventsForChangesInSone(Sone oldSone,
 858                         final Sone newSone) {
 859                 final List<Object> events = new ArrayList<Object>();
 860                 SoneChangeDetector soneChangeDetector = new SoneChangeDetector(
 861                                 oldSone);
 862                 soneChangeDetector.onNewPosts(new PostProcessor() {
 863                         @Override
 864                         public void processPost(Post post) {
 865                                 if (post.getTime() < getSoneFollowingTime(newSone)) {
 866                                         post.setKnown(true);
 867                                 } else if (!post.isKnown()) {
 868                                         events.add(new NewPostFoundEvent(post));
 869                                 }
 870                         }
 871                 });
 872                 soneChangeDetector.onRemovedPosts(new PostProcessor() {
 873                         @Override
 874                         public void processPost(Post post) {
 875                                 events.add(new PostRemovedEvent(post));
 876                         }
 877                 });
 878                 soneChangeDetector.onNewPostReplies(new PostReplyProcessor() {
 879                         @Override
 880                         public void processPostReply(PostReply postReply) {
 881                                 if (postReply.getTime() < getSoneFollowingTime(newSone)) {
 882                                         postReply.setKnown(true);
 883                                 } else if (!postReply.isKnown()) {
 884                                         events.add(new NewPostReplyFoundEvent(postReply));
 885                                 }
 886                         }
 887                 });
 888                 soneChangeDetector.onRemovedPostReplies(new PostReplyProcessor() {
 889                         @Override
 890                         public void processPostReply(PostReply postReply) {
 891                                 events.add(new PostReplyRemovedEvent(postReply));
 892                         }
 893                 });
 894                 soneChangeDetector.detectChanges(newSone);
 895                 return events;
 896         }
 897
 898         /**
 899          * Deletes the given Sone. This will remove the Sone from the
 900          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 901          * remove the context from its identity.
 902          *
 903          * @param sone
 904          *            The Sone to delete
 905          */
 906         public void deleteSone(Sone sone) {
 907                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 908                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 909                         return;
 910                 }
 911                 if (!getLocalSones().contains(sone)) {
 912                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 913                         return;
 914                 }
 915                 SoneInserter soneInserter = soneInserters.remove(sone);
 916                 soneInserter.stop();
 917                 database.removeSone(sone);
 918                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 919                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 920                 try {
 921                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 922                 } catch (ConfigurationException ce1) {
 923                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 924                 }
 925         }
 926
 927         /**
 928          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 929          * known} before, a {@link MarkSoneKnownEvent} is fired.
 930          *
 931          * @param sone
 932          *            The Sone to mark as known
 933          */
 934         public void markSoneKnown(Sone sone) {
 935                 if (!sone.isKnown()) {
 936                         sone.setKnown(true);
 937                         database.setSoneKnown(sone);
 938                         eventBus.post(new MarkSoneKnownEvent(sone));
 939                         touchConfiguration();
 940                 }
 941         }
 942
 943         /**
 944          * Creates a new post.
 945          *
 946          * @param sone
 947          *            The Sone that creates the post
 948          * @param recipient
 949          *            The recipient Sone, or {@code null} if this post does not have
 950          *            a recipient
 951          * @param text
 952          *            The text of the post
 953          * @return The created post
 954          */
 955         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
 956                 checkNotNull(text, "text must not be null");
 957                 checkArgument(text.trim().length() > 0, "text must not be empty");
 958                 if (!sone.isLocal()) {
 959                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
 960                         return null;
 961                 }
 962                 PostBuilder postBuilder = database.newPostBuilder();
 963                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
 964                 if (recipient.isPresent()) {
 965                         postBuilder.to(recipient.get().getId());
 966                 }
 967                 final Post post = postBuilder.build();
 968                 database.storePost(post);
 969                 eventBus.post(new NewPostFoundEvent(post));
 970                 sone.addPost(post);
 971                 touchConfiguration();
 972                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
 973                 return post;
 974         }
 975
 976         /**
 977          * Deletes the given post.
 978          *
 979          * @param post
 980          *            The post to delete
 981          */
 982         public void deletePost(Post post) {
 983                 if (!post.getSone().isLocal()) {
 984                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
 985                         return;
 986                 }
 987                 database.removePost(post);
 988                 eventBus.post(new PostRemovedEvent(post));
 989                 markPostKnown(post);
 990                 touchConfiguration();
 991         }
 992
 993         /**
 994          * Marks the given post as known, if it is currently not a known post
 995          * (according to {@link Post#isKnown()}).
 996          *
 997          * @param post
 998          *            The post to mark as known
 999          */
1000         public void markPostKnown(Post post) {
1001                 post.setKnown(true);
1002                 eventBus.post(new MarkPostKnownEvent(post));
1003                 touchConfiguration();
1004                 for (PostReply reply : getReplies(post.getId())) {
1005                         markReplyKnown(reply);
1006                 }
1007         }
1008
1009         public void bookmarkPost(Post post) {
1010                 database.bookmarkPost(post);
1011         }
1012
1013         /**
1014          * Removes the given post from the bookmarks.
1015          *
1016          * @param post
1017          *            The post to unbookmark
1018          */
1019         public void unbookmarkPost(Post post) {
1020                 database.unbookmarkPost(post);
1021         }
1022
1023         /**
1024          * Creates a new reply.
1025          *
1026          * @param sone
1027          *            The Sone that creates the reply
1028          * @param post
1029          *            The post that this reply refers to
1030          * @param text
1031          *            The text of the reply
1032          * @return The created reply
1033          */
1034         public PostReply createReply(Sone sone, Post post, String text) {
1035                 checkNotNull(text, "text must not be null");
1036                 checkArgument(text.trim().length() > 0, "text must not be empty");
1037                 if (!sone.isLocal()) {
1038                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1039                         return null;
1040                 }
1041                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1042                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1043                 final PostReply reply = postReplyBuilder.build();
1044                 database.storePostReply(reply);
1045                 eventBus.post(new NewPostReplyFoundEvent(reply));
1046                 sone.addReply(reply);
1047                 touchConfiguration();
1048                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1049                 return reply;
1050         }
1051
1052         /**
1053          * Deletes the given reply.
1054          *
1055          * @param reply
1056          *            The reply to delete
1057          */
1058         public void deleteReply(PostReply reply) {
1059                 Sone sone = reply.getSone();
1060                 if (!sone.isLocal()) {
1061                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1062                         return;
1063                 }
1064                 database.removePostReply(reply);
1065                 markReplyKnown(reply);
1066                 sone.removeReply(reply);
1067                 touchConfiguration();
1068         }
1069
1070         /**
1071          * Marks the given reply as known, if it is currently not a known reply
1072          * (according to {@link Reply#isKnown()}).
1073          *
1074          * @param reply
1075          *            The reply to mark as known
1076          */
1077         public void markReplyKnown(PostReply reply) {
1078                 boolean previouslyKnown = reply.isKnown();
1079                 reply.setKnown(true);
1080                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1081                 if (!previouslyKnown) {
1082                         touchConfiguration();
1083                 }
1084         }
1085
1086         /**
1087          * Creates a new album for the given Sone.
1088          *
1089          * @param sone
1090          *            The Sone to create the album for
1091          * @param parent
1092          *            The parent of the album (may be {@code null} to create a
1093          *            top-level album)
1094          * @return The new album
1095          */
1096         public Album createAlbum(Sone sone, Album parent) {
1097                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1098                 database.storeAlbum(album);
1099                 parent.addAlbum(album);
1100                 return album;
1101         }
1102
1103         /**
1104          * Deletes the given album. The owner of the album has to be a local Sone,
1105          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1106          *
1107          * @param album
1108          *            The album to remove
1109          */
1110         public void deleteAlbum(Album album) {
1111                 checkNotNull(album, "album must not be null");
1112                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1113                 if (!album.isEmpty()) {
1114                         return;
1115                 }
1116                 album.getParent().removeAlbum(album);
1117                 database.removeAlbum(album);
1118                 touchConfiguration();
1119         }
1120
1121         /**
1122          * Creates a new image.
1123          *
1124          * @param sone
1125          *            The Sone creating the image
1126          * @param album
1127          *            The album the image will be inserted into
1128          * @param temporaryImage
1129          *            The temporary image to create the image from
1130          * @return The newly created image
1131          */
1132         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1133                 checkNotNull(sone, "sone must not be null");
1134                 checkNotNull(album, "album must not be null");
1135                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1136                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1137                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1138                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1139                 album.addImage(image);
1140                 database.storeImage(image);
1141                 imageInserter.insertImage(temporaryImage, image);
1142                 return image;
1143         }
1144
1145         /**
1146          * Deletes the given image. This method will also delete a matching
1147          * temporary image.
1148          *
1149          * @see #deleteTemporaryImage(String)
1150          * @param image
1151          *            The image to delete
1152          */
1153         public void deleteImage(Image image) {
1154                 checkNotNull(image, "image must not be null");
1155                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1156                 deleteTemporaryImage(image.getId());
1157                 image.getAlbum().removeImage(image);
1158                 database.removeImage(image);
1159                 touchConfiguration();
1160         }
1161
1162         /**
1163          * Creates a new temporary image.
1164          *
1165          * @param mimeType
1166          *            The MIME type of the temporary image
1167          * @param imageData
1168          *            The encoded data of the image
1169          * @return The temporary image
1170          */
1171         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1172                 TemporaryImage temporaryImage = new TemporaryImage();
1173                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1174                 synchronized (temporaryImages) {
1175                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1176                 }
1177                 return temporaryImage;
1178         }
1179
1180         /**
1181          * Deletes the temporary image with the given ID.
1182          *
1183          * @param imageId
1184          *            The ID of the temporary image to delete
1185          */
1186         public void deleteTemporaryImage(String imageId) {
1187                 checkNotNull(imageId, "imageId must not be null");
1188                 synchronized (temporaryImages) {
1189                         temporaryImages.remove(imageId);
1190                 }
1191                 Image image = getImage(imageId, false);
1192                 if (image != null) {
1193                         imageInserter.cancelImageInsert(image);
1194                 }
1195         }
1196
1197         /**
1198          * Notifies the core that the configuration, either of the core or of a
1199          * single local Sone, has changed, and that the configuration should be
1200          * saved.
1201          */
1202         public void touchConfiguration() {
1203                 lastConfigurationUpdate = System.currentTimeMillis();
1204         }
1205
1206         //
1207         // SERVICE METHODS
1208         //
1209
1210         /**
1211          * Starts the core.
1212          */
1213         @Override
1214         public void serviceStart() {
1215                 loadConfiguration();
1216                 updateChecker.start();
1217                 identityManager.start();
1218                 webOfTrustUpdater.init();
1219                 webOfTrustUpdater.start();
1220                 database.start();
1221         }
1222
1223         /**
1224          * {@inheritDoc}
1225          */
1226         @Override
1227         public void serviceRun() {
1228                 long lastSaved = System.currentTimeMillis();
1229                 while (!shouldStop()) {
1230                         sleep(1000);
1231                         long now = System.currentTimeMillis();
1232                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1233                                 saveConfiguration();
1234                                 lastSaved = now;
1235                         }
1236                 }
1237         }
1238
1239         /**
1240          * Stops the core.
1241          */
1242         @Override
1243         public void serviceStop() {
1244                 localElementTicker.shutdownNow();
1245                 synchronized (soneInserters) {
1246                         for (Entry<LocalSone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1247                                 soneInserter.getValue().stop();
1248                         }
1249                 }
1250                 database.stop();
1251                 saveConfiguration();
1252                 webOfTrustUpdater.stop();
1253                 updateChecker.stop();
1254                 soneDownloader.stop();
1255                 soneDownloaders.shutdown();
1256                 identityManager.stop();
1257         }
1258
1259         //
1260         // PRIVATE METHODS
1261         //
1262
1263         /**
1264          * Saves the current options.
1265          */
1266         private void saveConfiguration() {
1267                 synchronized (configuration) {
1268                         if (storingConfiguration) {
1269                                 logger.log(Level.FINE, "Already storing configuration…");
1270                                 return;
1271                         }
1272                         storingConfiguration = true;
1273                 }
1274
1275                 /* store the options first. */
1276                 try {
1277                         preferences.saveTo(configuration);
1278
1279                         /* save Sone following times. */
1280                         int soneCounter = 0;
1281                         synchronized (soneFollowingTimes) {
1282                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1283                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1284                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1285                                         ++soneCounter;
1286                                 }
1287                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1288                         }
1289
1290                         /* save known posts. */
1291                         database.save();
1292
1293                         /* now save it. */
1294                         configuration.save();
1295
1296                 } catch (ConfigurationException ce1) {
1297                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1298                 } catch (DatabaseException de1) {
1299                         logger.log(Level.SEVERE, "Could not save database!", de1);
1300                 } finally {
1301                         synchronized (configuration) {
1302                                 storingConfiguration = false;
1303                         }
1304                 }
1305         }
1306
1307         /**
1308          * Loads the configuration.
1309          */
1310         private void loadConfiguration() {
1311                 new PreferencesLoader(preferences).loadFrom(configuration);
1312
1313                 /* load Sone following times. */
1314                 int soneCounter = 0;
1315                 while (true) {
1316                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
1317                         if (soneId == null) {
1318                                 break;
1319                         }
1320                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
1321                         synchronized (soneFollowingTimes) {
1322                                 soneFollowingTimes.put(soneId, time);
1323                         }
1324                         ++soneCounter;
1325                 }
1326         }
1327
1328         /**
1329          * Notifies the core that a new {@link OwnIdentity} was added.
1330          *
1331          * @param ownIdentityAddedEvent
1332          *            The event
1333          */
1334         @Subscribe
1335         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1336                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1337                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1338                 if (ownIdentity.hasContext("Sone")) {
1339                         addLocalSone(ownIdentity);
1340                 }
1341         }
1342
1343         /**
1344          * Notifies the core that an {@link OwnIdentity} was removed.
1345          *
1346          * @param ownIdentityRemovedEvent
1347          *            The event
1348          */
1349         @Subscribe
1350         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1351                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1352                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1353                 trustedIdentities.removeAll(ownIdentity);
1354         }
1355
1356         /**
1357          * Notifies the core that a new {@link Identity} was added.
1358          *
1359          * @param identityAddedEvent
1360          *            The event
1361          */
1362         @Subscribe
1363         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1364                 Identity identity = identityAddedEvent.identity();
1365                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1366                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1367                 addRemoteSone(identity);
1368         }
1369
1370         /**
1371          * Notifies the core that an {@link Identity} was updated.
1372          *
1373          * @param identityUpdatedEvent
1374          *            The event
1375          */
1376         @Subscribe
1377         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1378                 Identity identity = identityUpdatedEvent.identity();
1379                 final Sone sone = getRemoteSone(identity.getId());
1380                 if (sone.isLocal()) {
1381                         return;
1382                 }
1383                 sone.setLatestEdition(fromNullable(tryParse(identity.getProperty("Sone.LatestEdition"))).or(sone.getLatestEdition()));
1384                 soneDownloader.addSone(sone);
1385                 soneDownloaders.execute(soneDownloader.fetchSoneAction(sone));
1386         }
1387
1388         /**
1389          * Notifies the core that an {@link Identity} was removed.
1390          *
1391          * @param identityRemovedEvent
1392          *            The event
1393          */
1394         @Subscribe
1395         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1396                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1397                 Identity identity = identityRemovedEvent.identity();
1398                 trustedIdentities.remove(ownIdentity, identity);
1399                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1400                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1401                                 continue;
1402                         }
1403                         if (trustedIdentity.getValue().contains(identity)) {
1404                                 return;
1405                         }
1406                 }
1407                 Optional<Sone> sone = getSone(identity.getId());
1408                 if (!sone.isPresent()) {
1409                         /* TODO - we don’t have the Sone anymore. should this happen? */
1410                         return;
1411                 }
1412                 database.removeSone(sone.get());
1413                 eventBus.post(new SoneRemovedEvent(sone.get()));
1414         }
1415
1416         @Subscribe
1417         public void soneInserted(SoneInsertedEvent soneInsertedEvent) {
1418                 Sone sone = soneInsertedEvent.sone();
1419                 database.setLastInsertFingerprint(sone, soneInsertedEvent.insertFingerprint());
1420                 webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(
1421                                 sone.getLatestEdition()));
1422         }
1423
1424         /**
1425          * Deletes the temporary image.
1426          *
1427          * @param imageInsertFinishedEvent
1428          *            The event
1429          */
1430         @Subscribe
1431         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1432                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
1433                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
1434                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
1435                 touchConfiguration();
1436         }
1437
1438         @VisibleForTesting
1439         class MarkPostKnown implements Runnable {
1440
1441                 private final Post post;
1442
1443                 public MarkPostKnown(Post post) {
1444                         this.post = post;
1445                 }
1446
1447                 @Override
1448                 public void run() {
1449                         markPostKnown(post);
1450                 }
1451
1452         }
1453
1454         @VisibleForTesting
1455         class MarkReplyKnown implements Runnable {
1456
1457                 private final PostReply postReply;
1458
1459                 public MarkReplyKnown(PostReply postReply) {
1460                         this.postReply = postReply;
1461                 }
1462
1463                 @Override
1464                 public void run() {
1465                         markReplyKnown(postReply);
1466                 }
1467
1468         }
1469
1470 }