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

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2016 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.lang.String.format;
  25 import static java.util.logging.Level.WARNING;
  26 import static java.util.logging.Logger.getLogger;
  27
  28 import java.util.ArrayList;
  29 import java.util.Collection;
  30 import java.util.HashMap;
  31 import java.util.HashSet;
  32 import java.util.List;
  33 import java.util.Map;
  34 import java.util.Map.Entry;
  35 import java.util.Set;
  36 import java.util.concurrent.ExecutorService;
  37 import java.util.concurrent.Executors;
  38 import java.util.concurrent.ScheduledExecutorService;
  39 import java.util.concurrent.TimeUnit;
  40 import java.util.logging.Level;
  41 import java.util.logging.Logger;
  42
  43 import javax.annotation.Nonnull;
  44 import javax.annotation.Nullable;
  45
  46 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidAlbumFound;
  47 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidImageFound;
  48 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidParentAlbumFound;
  49 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostFound;
  50 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostReplyFound;
  51 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  52 import net.pterodactylus.sone.core.event.InsertionDelayChangedEvent;
  53 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  54 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  55 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  56 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  57 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  58 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  59 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  60 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  61 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  62 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  63 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  64 import net.pterodactylus.sone.data.Album;
  65 import net.pterodactylus.sone.data.Client;
  66 import net.pterodactylus.sone.data.Image;
  67 import net.pterodactylus.sone.data.Post;
  68 import net.pterodactylus.sone.data.PostReply;
  69 import net.pterodactylus.sone.data.Profile;
  70 import net.pterodactylus.sone.data.Profile.Field;
  71 import net.pterodactylus.sone.data.Reply;
  72 import net.pterodactylus.sone.data.Sone;
  73 import net.pterodactylus.sone.data.Sone.SoneStatus;
  74 import net.pterodactylus.sone.data.SoneOptions.LoadExternalContent;
  75 import net.pterodactylus.sone.data.TemporaryImage;
  76 import net.pterodactylus.sone.database.AlbumBuilder;
  77 import net.pterodactylus.sone.database.Database;
  78 import net.pterodactylus.sone.database.DatabaseException;
  79 import net.pterodactylus.sone.database.ImageBuilder;
  80 import net.pterodactylus.sone.database.PostBuilder;
  81 import net.pterodactylus.sone.database.PostProvider;
  82 import net.pterodactylus.sone.database.PostReplyBuilder;
  83 import net.pterodactylus.sone.database.PostReplyProvider;
  84 import net.pterodactylus.sone.database.SoneBuilder;
  85 import net.pterodactylus.sone.database.SoneProvider;
  86 import net.pterodactylus.sone.freenet.wot.Identity;
  87 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  88 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  89 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  90 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  91 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  92 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  93 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  94 import net.pterodactylus.sone.main.SonePlugin;
  95 import net.pterodactylus.util.config.Configuration;
  96 import net.pterodactylus.util.config.ConfigurationException;
  97 import net.pterodactylus.util.service.AbstractService;
  98 import net.pterodactylus.util.thread.NamedThreadFactory;
  99
 100 import com.google.common.annotations.VisibleForTesting;
 101 import com.google.common.base.Optional;
 102 import com.google.common.collect.FluentIterable;
 103 import com.google.common.collect.HashMultimap;
 104 import com.google.common.collect.Multimap;
 105 import com.google.common.collect.Multimaps;
 106 import com.google.common.eventbus.EventBus;
 107 import com.google.common.eventbus.Subscribe;
 108 import com.google.inject.Inject;
 109 import com.google.inject.Singleton;
 110 import kotlin.jvm.functions.Function1;
 111
 112 /**
 113  * The Sone core.
 114  */
 115 @Singleton
 116 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 117
 118         /** The logger. */
 119         private static final Logger logger = getLogger(Core.class.getName());
 120
 121         /** The start time. */
 122         private final long startupTime = System.currentTimeMillis();
 123
 124         /** The preferences. */
 125         private final Preferences preferences;
 126
 127         /** The event bus. */
 128         private final EventBus eventBus;
 129
 130         /** The configuration. */
 131         private final Configuration configuration;
 132
 133         /** Whether we’re currently saving the configuration. */
 134         private boolean storingConfiguration = false;
 135
 136         /** The identity manager. */
 137         private final IdentityManager identityManager;
 138
 139         /** Interface to freenet. */
 140         private final FreenetInterface freenetInterface;
 141
 142         /** The Sone downloader. */
 143         private final SoneDownloader soneDownloader;
 144
 145         /** The image inserter. */
 146         private final ImageInserter imageInserter;
 147
 148         /** Sone downloader thread-pool. */
 149         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 150
 151         /** The update checker. */
 152         private final UpdateChecker updateChecker;
 153
 154         /** The trust updater. */
 155         private final WebOfTrustUpdater webOfTrustUpdater;
 156
 157         /** Locked local Sones. */
 158         /* synchronize on itself. */
 159         private final Set<Sone> lockedSones = new HashSet<Sone>();
 160
 161         /** Sone inserters. */
 162         /* synchronize access on this on sones. */
 163         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 164
 165         /** Sone rescuers. */
 166         /* synchronize access on this on sones. */
 167         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 168
 169         /** All known Sones. */
 170         private final Set<String> knownSones = new HashSet<String>();
 171
 172         /** The post database. */
 173         private final Database database;
 174
 175         /** Trusted identities, sorted by own identities. */
 176         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 177
 178         /** All temporary images. */
 179         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 180
 181         /** Ticker for threads that mark own elements as known. */
 182         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 183
 184         /** The time the configuration was last touched. */
 185         private volatile long lastConfigurationUpdate;
 186
 187         /**
 188          * Creates a new core.
 189          *
 190          * @param configuration
 191          *            The configuration of the core
 192          * @param freenetInterface
 193          *            The freenet interface
 194          * @param identityManager
 195          *            The identity manager
 196          * @param webOfTrustUpdater
 197          *            The WebOfTrust updater
 198          * @param eventBus
 199          *            The event bus
 200          * @param database
 201          *            The database
 202          */
 203         @Inject
 204         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 205                 super("Sone Core");
 206                 this.configuration = configuration;
 207                 this.freenetInterface = freenetInterface;
 208                 this.identityManager = identityManager;
 209                 this.soneDownloader = soneDownloader;
 210                 this.imageInserter = imageInserter;
 211                 this.updateChecker = updateChecker;
 212                 this.webOfTrustUpdater = webOfTrustUpdater;
 213                 this.eventBus = eventBus;
 214                 this.database = database;
 215                 preferences = new Preferences(eventBus);
 216         }
 217
 218         //
 219         // ACCESSORS
 220         //
 221
 222         /**
 223          * Returns the time Sone was started.
 224          *
 225          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 226          */
 227         public long getStartupTime() {
 228                 return startupTime;
 229         }
 230
 231         /**
 232          * Returns the options used by the core.
 233          *
 234          * @return The options of the core
 235          */
 236         public Preferences getPreferences() {
 237                 return preferences;
 238         }
 239
 240         /**
 241          * Returns the identity manager used by the core.
 242          *
 243          * @return The identity manager
 244          */
 245         public IdentityManager getIdentityManager() {
 246                 return identityManager;
 247         }
 248
 249         /**
 250          * Returns the update checker.
 251          *
 252          * @return The update checker
 253          */
 254         public UpdateChecker getUpdateChecker() {
 255                 return updateChecker;
 256         }
 257
 258         /**
 259          * Returns the Sone rescuer for the given local Sone.
 260          *
 261          * @param sone
 262          *            The local Sone to get the rescuer for
 263          * @return The Sone rescuer for the given Sone
 264          */
 265         public SoneRescuer getSoneRescuer(Sone sone) {
 266                 checkNotNull(sone, "sone must not be null");
 267                 checkArgument(sone.isLocal(), "sone must be local");
 268                 synchronized (soneRescuers) {
 269                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 270                         if (soneRescuer == null) {
 271                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 272                                 soneRescuers.put(sone, soneRescuer);
 273                                 soneRescuer.start();
 274                         }
 275                         return soneRescuer;
 276                 }
 277         }
 278
 279         /**
 280          * Returns whether the given Sone is currently locked.
 281          *
 282          * @param sone
 283          *            The sone to check
 284          * @return {@code true} if the Sone is locked, {@code false} if it is not
 285          */
 286         public boolean isLocked(Sone sone) {
 287                 synchronized (lockedSones) {
 288                         return lockedSones.contains(sone);
 289                 }
 290         }
 291
 292         public SoneBuilder soneBuilder() {
 293                 return database.newSoneBuilder();
 294         }
 295
 296         /**
 297          * {@inheritDocs}
 298          */
 299         @Nonnull
 300         @Override
 301         public Collection<Sone> getSones() {
 302                 return database.getSones();
 303         }
 304
 305         @Nonnull
 306         @Override
 307         public Function1<String, Sone> getSoneLoader() {
 308                 return database.getSoneLoader();
 309         }
 310
 311         /**
 312          * Returns the Sone with the given ID, regardless whether it’s local or
 313          * remote.
 314          *
 315          * @param id
 316          *            The ID of the Sone to get
 317          * @return The Sone with the given ID, or {@code null} if there is no such
 318          *         Sone
 319          */
 320         @Override
 321         @Nullable
 322         public Sone getSone(@Nonnull String id) {
 323                 return database.getSone(id);
 324         }
 325
 326         /**
 327          * {@inheritDocs}
 328          */
 329         @Override
 330         public Collection<Sone> getLocalSones() {
 331                 return database.getLocalSones();
 332         }
 333
 334         /**
 335          * Returns the local Sone with the given ID, optionally creating a new Sone.
 336          *
 337          * @param id
 338          *            The ID of the Sone
 339          * @return The Sone with the given ID, or {@code null}
 340          */
 341         public Sone getLocalSone(String id) {
 342                 Sone sone = database.getSone(id);
 343                 if ((sone != null) && sone.isLocal()) {
 344                         return sone;
 345                 }
 346                 return null;
 347         }
 348
 349         /**
 350          * {@inheritDocs}
 351          */
 352         @Override
 353         public Collection<Sone> getRemoteSones() {
 354                 return database.getRemoteSones();
 355         }
 356
 357         /**
 358          * Returns the remote Sone with the given ID.
 359          *
 360          *
 361          * @param id
 362          *            The ID of the remote Sone to get
 363          * @return The Sone with the given ID
 364          */
 365         public Sone getRemoteSone(String id) {
 366                 return database.getSone(id);
 367         }
 368
 369         /**
 370          * Returns whether the given Sone has been modified.
 371          *
 372          * @param sone
 373          *            The Sone to check for modifications
 374          * @return {@code true} if a modification has been detected in the Sone,
 375          *         {@code false} otherwise
 376          */
 377         public boolean isModifiedSone(Sone sone) {
 378                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 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         @Nullable
 391         @Override
 392         public Post getPost(@Nonnull String postId) {
 393                 return database.getPost(postId);
 394         }
 395
 396         /**
 397          * {@inheritDocs}
 398          */
 399         @Override
 400         public Collection<Post> getPosts(String soneId) {
 401                 return database.getPosts(soneId);
 402         }
 403
 404         /**
 405          * {@inheritDoc}
 406          */
 407         @Override
 408         public Collection<Post> getDirectedPosts(final String recipientId) {
 409                 checkNotNull(recipientId, "recipient must not be null");
 410                 return database.getDirectedPosts(recipientId);
 411         }
 412
 413         /**
 414          * Returns a post reply builder.
 415          *
 416          * @return A new post reply builder
 417          */
 418         public PostReplyBuilder postReplyBuilder() {
 419                 return database.newPostReplyBuilder();
 420         }
 421
 422         /**
 423          * {@inheritDoc}
 424          */
 425         @Nullable
 426         @Override
 427         public PostReply getPostReply(String replyId) {
 428                 return database.getPostReply(replyId);
 429         }
 430
 431         /**
 432          * {@inheritDoc}
 433          */
 434         @Override
 435         public List<PostReply> getReplies(final String postId) {
 436                 return database.getReplies(postId);
 437         }
 438
 439         /**
 440          * Returns all Sones that have liked the given post.
 441          *
 442          * @param post
 443          *            The post to get the liking Sones for
 444          * @return The Sones that like the given post
 445          */
 446         public Set<Sone> getLikes(Post post) {
 447                 Set<Sone> sones = new HashSet<Sone>();
 448                 for (Sone sone : getSones()) {
 449                         if (sone.getLikedPostIds().contains(post.getId())) {
 450                                 sones.add(sone);
 451                         }
 452                 }
 453                 return sones;
 454         }
 455
 456         /**
 457          * Returns all Sones that have liked the given reply.
 458          *
 459          * @param reply
 460          *            The reply to get the liking Sones for
 461          * @return The Sones that like the given reply
 462          */
 463         public Set<Sone> getLikes(PostReply reply) {
 464                 Set<Sone> sones = new HashSet<Sone>();
 465                 for (Sone sone : getSones()) {
 466                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 467                                 sones.add(sone);
 468                         }
 469                 }
 470                 return sones;
 471         }
 472
 473         /**
 474          * Returns whether the given post is bookmarked.
 475          *
 476          * @param post
 477          *            The post to check
 478          * @return {@code true} if the given post is bookmarked, {@code false}
 479          *         otherwise
 480          */
 481         public boolean isBookmarked(Post post) {
 482                 return database.isPostBookmarked(post);
 483         }
 484
 485         /**
 486          * Returns all currently known bookmarked posts.
 487          *
 488          * @return All bookmarked posts
 489          */
 490         public Set<Post> getBookmarkedPosts() {
 491                 return database.getBookmarkedPosts();
 492         }
 493
 494         public AlbumBuilder albumBuilder() {
 495                 return database.newAlbumBuilder();
 496         }
 497
 498         /**
 499          * Returns the album with the given ID, optionally creating a new album if
 500          * an album with the given ID can not be found.
 501          *
 502          * @param albumId
 503          *            The ID of the album
 504          * @return The album with the given ID, or {@code null} if no album with the
 505          *         given ID exists
 506          */
 507         @Nullable
 508         public Album getAlbum(@Nonnull String albumId) {
 509                 return database.getAlbum(albumId);
 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         @Nullable
 524         public Image getImage(String imageId) {
 525                 return getImage(imageId, true);
 526         }
 527
 528         /**
 529          * Returns the image with the given ID, optionally creating it if it does
 530          * not exist.
 531          *
 532          * @param imageId
 533          *            The ID of the image
 534          * @param create
 535          *            {@code true} to create an image if none exists with the given
 536          *            ID
 537          * @return The image with the given ID, or {@code null} if none exists and
 538          *         none was created
 539          */
 540         @Nullable
 541         public Image getImage(String imageId, boolean create) {
 542                 Image image = database.getImage(imageId);
 543                 if (image != null) {
 544                         return image;
 545                 }
 546                 if (!create) {
 547                         return null;
 548                 }
 549                 Image newImage = database.newImageBuilder().withId(imageId).build();
 550                 database.storeImage(newImage);
 551                 return newImage;
 552         }
 553
 554         /**
 555          * Returns the temporary image with the given ID.
 556          *
 557          * @param imageId
 558          *            The ID of the temporary image
 559          * @return The temporary image, or {@code null} if there is no temporary
 560          *         image with the given ID
 561          */
 562         public TemporaryImage getTemporaryImage(String imageId) {
 563                 synchronized (temporaryImages) {
 564                         return temporaryImages.get(imageId);
 565                 }
 566         }
 567
 568         //
 569         // ACTIONS
 570         //
 571
 572         /**
 573          * Locks the given Sone. A locked Sone will not be inserted by
 574          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 575          * again.
 576          *
 577          * @param sone
 578          *            The sone to lock
 579          */
 580         public void lockSone(Sone sone) {
 581                 synchronized (lockedSones) {
 582                         if (lockedSones.add(sone)) {
 583                                 eventBus.post(new SoneLockedEvent(sone));
 584                         }
 585                 }
 586         }
 587
 588         /**
 589          * Unlocks the given Sone.
 590          *
 591          * @see #lockSone(Sone)
 592          * @param sone
 593          *            The sone to unlock
 594          */
 595         public void unlockSone(Sone sone) {
 596                 synchronized (lockedSones) {
 597                         if (lockedSones.remove(sone)) {
 598                                 eventBus.post(new SoneUnlockedEvent(sone));
 599                         }
 600                 }
 601         }
 602
 603         /**
 604          * Adds a local Sone from the given own identity.
 605          *
 606          * @param ownIdentity
 607          *            The own identity to create a Sone from
 608          * @return The added (or already existing) Sone
 609          */
 610         public Sone addLocalSone(OwnIdentity ownIdentity) {
 611                 if (ownIdentity == null) {
 612                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 613                         return null;
 614                 }
 615                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 616                 Sone sone = database.newSoneBuilder().local().from(ownIdentity).build();
 617                 String property = fromNullable(ownIdentity.getProperty("Sone.LatestEdition")).or("0");
 618                 sone.setLatestEdition(fromNullable(tryParse(property)).or(0L));
 619                 sone.setClient(new Client("Sone", SonePlugin.getPluginVersion()));
 620                 sone.setKnown(true);
 621                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, ownIdentity.getId());
 622                 soneInserter.insertionDelayChanged(new InsertionDelayChangedEvent(preferences.getInsertionDelay()));
 623                 eventBus.register(soneInserter);
 624                 synchronized (soneInserters) {
 625                         soneInserters.put(sone, soneInserter);
 626                 }
 627                 loadSone(sone);
 628                 database.storeSone(sone);
 629                 sone.setStatus(SoneStatus.idle);
 630                 soneInserter.start();
 631                 return sone;
 632         }
 633
 634         /**
 635          * Creates a new Sone for the given own identity.
 636          *
 637          * @param ownIdentity
 638          *            The own identity to create a Sone for
 639          * @return The created Sone
 640          */
 641         public Sone createSone(OwnIdentity ownIdentity) {
 642                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 643                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 644                         return null;
 645                 }
 646                 Sone sone = addLocalSone(ownIdentity);
 647
 648                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 649                 touchConfiguration();
 650                 return sone;
 651         }
 652
 653         /**
 654          * Adds the Sone of the given identity.
 655          *
 656          * @param identity
 657          *            The identity whose Sone to add
 658          * @return The added or already existing Sone
 659          */
 660         public Sone addRemoteSone(Identity identity) {
 661                 if (identity == null) {
 662                         logger.log(Level.WARNING, "Given Identity is null!");
 663                         return null;
 664                 }
 665                 String property = fromNullable(identity.getProperty("Sone.LatestEdition")).or("0");
 666                 long latestEdition = fromNullable(tryParse(property)).or(0L);
 667                 Sone existingSone = getSone(identity.getId());
 668                 if ((existingSone != null )&& existingSone.isLocal()) {
 669                         return existingSone;
 670                 }
 671                 boolean newSone = existingSone == null;
 672                 Sone sone = !newSone ? existingSone : database.newSoneBuilder().from(identity).build();
 673                 sone.setLatestEdition(latestEdition);
 674                 if (newSone) {
 675                         synchronized (knownSones) {
 676                                 newSone = !knownSones.contains(sone.getId());
 677                         }
 678                         sone.setKnown(!newSone);
 679                         if (newSone) {
 680                                 eventBus.post(new NewSoneFoundEvent(sone));
 681                                 for (Sone localSone : getLocalSones()) {
 682                                         if (localSone.getOptions().isAutoFollow()) {
 683                                                 followSone(localSone, sone.getId());
 684                                         }
 685                                 }
 686                         }
 687                 }
 688                 database.storeSone(sone);
 689                 soneDownloader.addSone(sone);
 690                 soneDownloaders.execute(soneDownloader.fetchSoneAsUskAction(sone));
 691                 return sone;
 692         }
 693
 694         /**
 695          * Lets the given local Sone follow the Sone with the given ID.
 696          *
 697          * @param sone
 698          *            The local Sone that should follow another Sone
 699          * @param soneId
 700          *            The ID of the Sone to follow
 701          */
 702         public void followSone(Sone sone, String soneId) {
 703                 checkNotNull(sone, "sone must not be null");
 704                 checkNotNull(soneId, "soneId must not be null");
 705                 database.addFriend(sone, soneId);
 706                 @SuppressWarnings("ConstantConditions") // we just followed, this can’t be null.
 707                 long now = database.getFollowingTime(soneId);
 708                 Sone followedSone = getSone(soneId);
 709                 if (followedSone == null) {
 710                         return;
 711                 }
 712                 for (Post post : followedSone.getPosts()) {
 713                         if (post.getTime() < now) {
 714                                 markPostKnown(post);
 715                         }
 716                 }
 717                 for (PostReply reply : followedSone.getReplies()) {
 718                         if (reply.getTime() < now) {
 719                                 markReplyKnown(reply);
 720                         }
 721                 }
 722                 touchConfiguration();
 723         }
 724
 725         /**
 726          * Lets the given local Sone unfollow the Sone with the given ID.
 727          *
 728          * @param sone
 729          *            The local Sone that should unfollow another Sone
 730          * @param soneId
 731          *            The ID of the Sone being unfollowed
 732          */
 733         public void unfollowSone(Sone sone, String soneId) {
 734                 checkNotNull(sone, "sone must not be null");
 735                 checkNotNull(soneId, "soneId must not be null");
 736                 database.removeFriend(sone, soneId);
 737                 touchConfiguration();
 738         }
 739
 740         /**
 741          * Sets the trust value of the given origin Sone for the target Sone.
 742          *
 743          * @param origin
 744          *            The origin Sone
 745          * @param target
 746          *            The target Sone
 747          * @param trustValue
 748          *            The trust value (from {@code -100} to {@code 100})
 749          */
 750         public void setTrust(Sone origin, Sone target, int trustValue) {
 751                 checkNotNull(origin, "origin must not be null");
 752                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 753                 checkNotNull(target, "target must not be null");
 754                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 755                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 756         }
 757
 758         /**
 759          * Removes any trust assignment for the given target Sone.
 760          *
 761          * @param origin
 762          *            The trust origin
 763          * @param target
 764          *            The trust target
 765          */
 766         public void removeTrust(Sone origin, Sone target) {
 767                 checkNotNull(origin, "origin must not be null");
 768                 checkNotNull(target, "target must not be null");
 769                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 770                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 771         }
 772
 773         /**
 774          * Assigns the configured positive trust value for the given target.
 775          *
 776          * @param origin
 777          *            The trust origin
 778          * @param target
 779          *            The trust target
 780          */
 781         public void trustSone(Sone origin, Sone target) {
 782                 setTrust(origin, target, preferences.getPositiveTrust());
 783         }
 784
 785         /**
 786          * Assigns the configured negative trust value for the given target.
 787          *
 788          * @param origin
 789          *            The trust origin
 790          * @param target
 791          *            The trust target
 792          */
 793         public void distrustSone(Sone origin, Sone target) {
 794                 setTrust(origin, target, preferences.getNegativeTrust());
 795         }
 796
 797         /**
 798          * Removes the trust assignment for the given target.
 799          *
 800          * @param origin
 801          *            The trust origin
 802          * @param target
 803          *            The trust target
 804          */
 805         public void untrustSone(Sone origin, Sone target) {
 806                 removeTrust(origin, target);
 807         }
 808
 809         /**
 810          * Updates the stored Sone with the given Sone.
 811          *
 812          * @param sone
 813          *            The updated Sone
 814          */
 815         public void updateSone(Sone sone) {
 816                 updateSone(sone, false);
 817         }
 818
 819         /**
 820          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 821          * {@code true}, an older Sone than the current Sone can be given to restore
 822          * an old state.
 823          *
 824          * @param sone
 825          *            The Sone to update
 826          * @param soneRescueMode
 827          *            {@code true} if the stored Sone should be updated regardless
 828          *            of the age of the given Sone
 829          */
 830         public void updateSone(final Sone sone, boolean soneRescueMode) {
 831                 Sone storedSone = getSone(sone.getId());
 832                 if (storedSone != null) {
 833                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
 834                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 835                                 return;
 836                         }
 837                         List<Object> events =
 838                                         collectEventsForChangesInSone(storedSone, sone);
 839                         database.storeSone(sone);
 840                         for (Object event : events) {
 841                                 eventBus.post(event);
 842                         }
 843                         sone.setOptions(storedSone.getOptions());
 844                         sone.setKnown(storedSone.isKnown());
 845                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 846                         if (sone.isLocal()) {
 847                                 touchConfiguration();
 848                         }
 849                 }
 850         }
 851
 852         private List<Object> collectEventsForChangesInSone(Sone oldSone, Sone newSone) {
 853                 List<Object> events = new ArrayList<>();
 854                 SoneComparison soneComparison = new SoneComparison(oldSone, newSone);
 855                 for (Post newPost : soneComparison.getNewPosts()) {
 856                         if (newPost.getSone().equals(newSone)) {
 857                                 newPost.setKnown(true);
 858                         } else if (newPost.getTime() < database.getFollowingTime(newSone.getId())) {
 859                                 newPost.setKnown(true);
 860                         } else if (!newPost.isKnown()) {
 861                                 events.add(new NewPostFoundEvent(newPost));
 862                         }
 863                 }
 864                 for (Post post : soneComparison.getRemovedPosts()) {
 865                         events.add(new PostRemovedEvent(post));
 866                 }
 867                 for (PostReply postReply : soneComparison.getNewPostReplies()) {
 868                         if (postReply.getSone().equals(newSone)) {
 869                                 postReply.setKnown(true);
 870                         } else if (postReply.getTime() < database.getFollowingTime(newSone.getId())) {
 871                                 postReply.setKnown(true);
 872                         } else if (!postReply.isKnown()) {
 873                                 events.add(new NewPostReplyFoundEvent(postReply));
 874                         }
 875                 }
 876                 for (PostReply postReply : soneComparison.getRemovedPostReplies()) {
 877                         events.add(new PostReplyRemovedEvent(postReply));
 878                 }
 879                 return events;
 880         }
 881
 882         /**
 883          * Deletes the given Sone. This will remove the Sone from the
 884          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 885          * remove the context from its identity.
 886          *
 887          * @param sone
 888          *            The Sone to delete
 889          */
 890         public void deleteSone(Sone sone) {
 891                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 892                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 893                         return;
 894                 }
 895                 if (!getLocalSones().contains(sone)) {
 896                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 897                         return;
 898                 }
 899                 SoneInserter soneInserter = soneInserters.remove(sone);
 900                 soneInserter.stop();
 901                 database.removeSone(sone);
 902                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 903                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 904                 try {
 905                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 906                 } catch (ConfigurationException ce1) {
 907                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 908                 }
 909         }
 910
 911         /**
 912          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 913          * known} before, a {@link MarkSoneKnownEvent} is fired.
 914          *
 915          * @param sone
 916          *            The Sone to mark as known
 917          */
 918         public void markSoneKnown(Sone sone) {
 919                 if (!sone.isKnown()) {
 920                         sone.setKnown(true);
 921                         synchronized (knownSones) {
 922                                 knownSones.add(sone.getId());
 923                         }
 924                         eventBus.post(new MarkSoneKnownEvent(sone));
 925                         touchConfiguration();
 926                 }
 927         }
 928
 929         /**
 930          * Loads and updates the given Sone from the configuration. If any error is
 931          * encountered, loading is aborted and the given Sone is not changed.
 932          *
 933          * @param sone
 934          *            The Sone to load and update
 935          */
 936         public void loadSone(Sone sone) {
 937                 if (!sone.isLocal()) {
 938                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
 939                         return;
 940                 }
 941                 logger.info(String.format("Loading local Sone: %s", sone));
 942
 943                 /* load Sone. */
 944                 String sonePrefix = "Sone/" + sone.getId();
 945                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 946                 if (soneTime == null) {
 947                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 948                         return;
 949                 }
 950                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 951
 952                 /* load profile. */
 953                 ConfigurationSoneParser configurationSoneParser = new ConfigurationSoneParser(configuration, sone);
 954                 Profile profile = configurationSoneParser.parseProfile();
 955
 956                 /* load posts. */
 957                 Collection<Post> posts;
 958                 try {
 959                         posts = configurationSoneParser.parsePosts(database);
 960                 } catch (InvalidPostFound ipf) {
 961                         logger.log(Level.WARNING, "Invalid post found, aborting load!");
 962                         return;
 963                 }
 964
 965                 /* load replies. */
 966                 Collection<PostReply> replies;
 967                 try {
 968                         replies = configurationSoneParser.parsePostReplies(database);
 969                 } catch (InvalidPostReplyFound iprf) {
 970                         logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 971                         return;
 972                 }
 973
 974                 /* load post likes. */
 975                 Set<String> likedPostIds =
 976                                 configurationSoneParser.parseLikedPostIds();
 977
 978                 /* load reply likes. */
 979                 Set<String> likedReplyIds =
 980                                 configurationSoneParser.parseLikedPostReplyIds();
 981
 982                 /* load albums. */
 983                 List<Album> topLevelAlbums;
 984                 try {
 985                         topLevelAlbums =
 986                                         configurationSoneParser.parseTopLevelAlbums(database);
 987                 } catch (InvalidAlbumFound iaf) {
 988                         logger.log(Level.WARNING, "Invalid album found, aborting load!");
 989                         return;
 990                 } catch (InvalidParentAlbumFound ipaf) {
 991                         logger.log(Level.WARNING, format("Invalid parent album ID: %s",
 992                                         ipaf.getAlbumParentId()));
 993                         return;
 994                 }
 995
 996                 /* load images. */
 997                 try {
 998                         configurationSoneParser.parseImages(database);
 999                 } catch (InvalidImageFound iif) {
1000                         logger.log(WARNING, "Invalid image found, aborting load!");
1001                         return;
1002                 } catch (InvalidParentAlbumFound ipaf) {
1003                         logger.log(Level.WARNING,
1004                                         format("Invalid album image (%s) encountered, aborting load!",
1005                                                         ipaf.getAlbumParentId()));
1006                         return;
1007                 }
1008
1009                 /* load avatar. */
1010                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1011                 if (avatarId != null) {
1012                         final Map<String, Image> images =
1013                                         configurationSoneParser.getImages();
1014                         profile.setAvatar(images.get(avatarId));
1015                 }
1016
1017                 /* load options. */
1018                 sone.getOptions().setAutoFollow(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(false));
1019                 sone.getOptions().setSoneInsertNotificationEnabled(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(false));
1020                 sone.getOptions().setShowNewSoneNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(true));
1021                 sone.getOptions().setShowNewPostNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(true));
1022                 sone.getOptions().setShowNewReplyNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(true));
1023                 sone.getOptions().setShowCustomAvatars(LoadExternalContent.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(LoadExternalContent.NEVER.name())));
1024                 sone.getOptions().setLoadLinkedImages(LoadExternalContent.valueOf(configuration.getStringValue(sonePrefix + "/Options/LoadLinkedImages").getValue(LoadExternalContent.NEVER.name())));
1025
1026                 /* if we’re still here, Sone was loaded successfully. */
1027                 synchronized (sone) {
1028                         sone.setTime(soneTime);
1029                         sone.setProfile(profile);
1030                         sone.setPosts(posts);
1031                         sone.setReplies(replies);
1032                         sone.setLikePostIds(likedPostIds);
1033                         sone.setLikeReplyIds(likedReplyIds);
1034                         for (Album album : sone.getRootAlbum().getAlbums()) {
1035                                 sone.getRootAlbum().removeAlbum(album);
1036                         }
1037                         for (Album album : topLevelAlbums) {
1038                                 sone.getRootAlbum().addAlbum(album);
1039                         }
1040                         synchronized (soneInserters) {
1041                                 soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1042                         }
1043                 }
1044                 for (Post post : posts) {
1045                         post.setKnown(true);
1046                 }
1047                 for (PostReply reply : replies) {
1048                         reply.setKnown(true);
1049                 }
1050
1051                 logger.info(String.format("Sone loaded successfully: %s", sone));
1052         }
1053
1054         /**
1055          * Creates a new post.
1056          *
1057          * @param sone
1058          *            The Sone that creates the post
1059          * @param recipient
1060          *            The recipient Sone, or {@code null} if this post does not have
1061          *            a recipient
1062          * @param text
1063          *            The text of the post
1064          * @return The created post
1065          */
1066         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
1067                 checkNotNull(text, "text must not be null");
1068                 checkArgument(text.trim().length() > 0, "text must not be empty");
1069                 if (!sone.isLocal()) {
1070                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1071                         return null;
1072                 }
1073                 PostBuilder postBuilder = database.newPostBuilder();
1074                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
1075                 if (recipient.isPresent()) {
1076                         postBuilder.to(recipient.get().getId());
1077                 }
1078                 final Post post = postBuilder.build();
1079                 database.storePost(post);
1080                 eventBus.post(new NewPostFoundEvent(post));
1081                 sone.addPost(post);
1082                 touchConfiguration();
1083                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
1084                 return post;
1085         }
1086
1087         /**
1088          * Deletes the given post.
1089          *
1090          * @param post
1091          *            The post to delete
1092          */
1093         public void deletePost(Post post) {
1094                 if (!post.getSone().isLocal()) {
1095                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1096                         return;
1097                 }
1098                 database.removePost(post);
1099                 eventBus.post(new PostRemovedEvent(post));
1100                 markPostKnown(post);
1101                 touchConfiguration();
1102         }
1103
1104         /**
1105          * Marks the given post as known, if it is currently not a known post
1106          * (according to {@link Post#isKnown()}).
1107          *
1108          * @param post
1109          *            The post to mark as known
1110          */
1111         public void markPostKnown(Post post) {
1112                 post.setKnown(true);
1113                 eventBus.post(new MarkPostKnownEvent(post));
1114                 touchConfiguration();
1115                 for (PostReply reply : getReplies(post.getId())) {
1116                         markReplyKnown(reply);
1117                 }
1118         }
1119
1120         public void bookmarkPost(Post post) {
1121                 database.bookmarkPost(post);
1122         }
1123
1124         /**
1125          * Removes the given post from the bookmarks.
1126          *
1127          * @param post
1128          *            The post to unbookmark
1129          */
1130         public void unbookmarkPost(Post post) {
1131                 database.unbookmarkPost(post);
1132         }
1133
1134         /**
1135          * Creates a new reply.
1136          *
1137          * @param sone
1138          *            The Sone that creates the reply
1139          * @param post
1140          *            The post that this reply refers to
1141          * @param text
1142          *            The text of the reply
1143          * @return The created reply
1144          */
1145         public PostReply createReply(Sone sone, Post post, String text) {
1146                 checkNotNull(text, "text must not be null");
1147                 checkArgument(text.trim().length() > 0, "text must not be empty");
1148                 if (!sone.isLocal()) {
1149                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1150                         return null;
1151                 }
1152                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1153                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1154                 final PostReply reply = postReplyBuilder.build();
1155                 database.storePostReply(reply);
1156                 eventBus.post(new NewPostReplyFoundEvent(reply));
1157                 sone.addReply(reply);
1158                 touchConfiguration();
1159                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1160                 return reply;
1161         }
1162
1163         /**
1164          * Deletes the given reply.
1165          *
1166          * @param reply
1167          *            The reply to delete
1168          */
1169         public void deleteReply(PostReply reply) {
1170                 Sone sone = reply.getSone();
1171                 if (!sone.isLocal()) {
1172                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1173                         return;
1174                 }
1175                 database.removePostReply(reply);
1176                 markReplyKnown(reply);
1177                 sone.removeReply(reply);
1178                 touchConfiguration();
1179         }
1180
1181         /**
1182          * Marks the given reply as known, if it is currently not a known reply
1183          * (according to {@link Reply#isKnown()}).
1184          *
1185          * @param reply
1186          *            The reply to mark as known
1187          */
1188         public void markReplyKnown(PostReply reply) {
1189                 boolean previouslyKnown = reply.isKnown();
1190                 reply.setKnown(true);
1191                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1192                 if (!previouslyKnown) {
1193                         touchConfiguration();
1194                 }
1195         }
1196
1197         /**
1198          * Creates a new album for the given Sone.
1199          *
1200          * @param sone
1201          *            The Sone to create the album for
1202          * @param parent
1203          *            The parent of the album (may be {@code null} to create a
1204          *            top-level album)
1205          * @return The new album
1206          */
1207         public Album createAlbum(Sone sone, Album parent) {
1208                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1209                 database.storeAlbum(album);
1210                 parent.addAlbum(album);
1211                 return album;
1212         }
1213
1214         /**
1215          * Deletes the given album. The owner of the album has to be a local Sone,
1216          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1217          *
1218          * @param album
1219          *            The album to remove
1220          */
1221         public void deleteAlbum(Album album) {
1222                 checkNotNull(album, "album must not be null");
1223                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1224                 if (!album.isEmpty()) {
1225                         return;
1226                 }
1227                 album.getParent().removeAlbum(album);
1228                 database.removeAlbum(album);
1229                 touchConfiguration();
1230         }
1231
1232         /**
1233          * Creates a new image.
1234          *
1235          * @param sone
1236          *            The Sone creating the image
1237          * @param album
1238          *            The album the image will be inserted into
1239          * @param temporaryImage
1240          *            The temporary image to create the image from
1241          * @return The newly created image
1242          */
1243         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1244                 checkNotNull(sone, "sone must not be null");
1245                 checkNotNull(album, "album must not be null");
1246                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1247                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1248                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1249                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1250                 album.addImage(image);
1251                 database.storeImage(image);
1252                 imageInserter.insertImage(temporaryImage, image);
1253                 return image;
1254         }
1255
1256         /**
1257          * Deletes the given image. This method will also delete a matching
1258          * temporary image.
1259          *
1260          * @see #deleteTemporaryImage(String)
1261          * @param image
1262          *            The image to delete
1263          */
1264         public void deleteImage(Image image) {
1265                 checkNotNull(image, "image must not be null");
1266                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1267                 deleteTemporaryImage(image.getId());
1268                 image.getAlbum().removeImage(image);
1269                 database.removeImage(image);
1270                 touchConfiguration();
1271         }
1272
1273         /**
1274          * Creates a new temporary image.
1275          *
1276          * @param mimeType
1277          *            The MIME type of the temporary image
1278          * @param imageData
1279          *            The encoded data of the image
1280          * @return The temporary image
1281          */
1282         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1283                 TemporaryImage temporaryImage = new TemporaryImage();
1284                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1285                 synchronized (temporaryImages) {
1286                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1287                 }
1288                 return temporaryImage;
1289         }
1290
1291         /**
1292          * Deletes the temporary image with the given ID.
1293          *
1294          * @param imageId
1295          *            The ID of the temporary image to delete
1296          */
1297         public void deleteTemporaryImage(String imageId) {
1298                 checkNotNull(imageId, "imageId must not be null");
1299                 synchronized (temporaryImages) {
1300                         temporaryImages.remove(imageId);
1301                 }
1302                 Image image = getImage(imageId, false);
1303                 if (image != null) {
1304                         imageInserter.cancelImageInsert(image);
1305                 }
1306         }
1307
1308         /**
1309          * Notifies the core that the configuration, either of the core or of a
1310          * single local Sone, has changed, and that the configuration should be
1311          * saved.
1312          */
1313         public void touchConfiguration() {
1314                 lastConfigurationUpdate = System.currentTimeMillis();
1315         }
1316
1317         //
1318         // SERVICE METHODS
1319         //
1320
1321         /**
1322          * Starts the core.
1323          */
1324         @Override
1325         public void serviceStart() {
1326                 loadConfiguration();
1327                 updateChecker.start();
1328                 identityManager.start();
1329                 webOfTrustUpdater.init();
1330                 webOfTrustUpdater.start();
1331                 database.start();
1332         }
1333
1334         /**
1335          * {@inheritDoc}
1336          */
1337         @Override
1338         public void serviceRun() {
1339                 long lastSaved = System.currentTimeMillis();
1340                 while (!shouldStop()) {
1341                         sleep(1000);
1342                         long now = System.currentTimeMillis();
1343                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1344                                 for (Sone localSone : getLocalSones()) {
1345                                         saveSone(localSone);
1346                                 }
1347                                 saveConfiguration();
1348                                 lastSaved = now;
1349                         }
1350                 }
1351         }
1352
1353         /**
1354          * Stops the core.
1355          */
1356         @Override
1357         public void serviceStop() {
1358                 localElementTicker.shutdownNow();
1359                 synchronized (soneInserters) {
1360                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1361                                 soneInserter.getValue().stop();
1362                                 saveSone(soneInserter.getKey());
1363                         }
1364                 }
1365                 synchronized (soneRescuers) {
1366                         for (SoneRescuer soneRescuer : soneRescuers.values()) {
1367                                 soneRescuer.stop();
1368                         }
1369                 }
1370                 saveConfiguration();
1371                 database.stop();
1372                 webOfTrustUpdater.stop();
1373                 updateChecker.stop();
1374                 soneDownloader.stop();
1375                 soneDownloaders.shutdown();
1376                 identityManager.stop();
1377         }
1378
1379         //
1380         // PRIVATE METHODS
1381         //
1382
1383         /**
1384          * Saves the given Sone. This will persist all local settings for the given
1385          * Sone, such as the friends list and similar, private options.
1386          *
1387          * @param sone
1388          *            The Sone to save
1389          */
1390         private synchronized void saveSone(Sone sone) {
1391                 if (!sone.isLocal()) {
1392                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1393                         return;
1394                 }
1395                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1396                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1397                         return;
1398                 }
1399
1400                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1401                 try {
1402                         /* save Sone into configuration. */
1403                         String sonePrefix = "Sone/" + sone.getId();
1404                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1405                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1406
1407                         /* save profile. */
1408                         Profile profile = sone.getProfile();
1409                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1410                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1411                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1412                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1413                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1414                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1415                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1416
1417                         /* save profile fields. */
1418                         int fieldCounter = 0;
1419                         for (Field profileField : profile.getFields()) {
1420                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1421                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1422                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1423                         }
1424                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1425
1426                         /* save posts. */
1427                         int postCounter = 0;
1428                         for (Post post : sone.getPosts()) {
1429                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1430                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1431                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1432                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1433                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1434                         }
1435                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1436
1437                         /* save replies. */
1438                         int replyCounter = 0;
1439                         for (PostReply reply : sone.getReplies()) {
1440                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1441                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1442                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1443                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1444                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1445                         }
1446                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1447
1448                         /* save post likes. */
1449                         int postLikeCounter = 0;
1450                         for (String postId : sone.getLikedPostIds()) {
1451                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1452                         }
1453                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1454
1455                         /* save reply likes. */
1456                         int replyLikeCounter = 0;
1457                         for (String replyId : sone.getLikedReplyIds()) {
1458                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1459                         }
1460                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1461
1462                         /* save albums. first, collect in a flat structure, top-level first. */
1463                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1464
1465                         int albumCounter = 0;
1466                         for (Album album : albums) {
1467                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1468                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1469                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1470                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1471                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1472                         }
1473                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1474
1475                         /* save images. */
1476                         int imageCounter = 0;
1477                         for (Album album : albums) {
1478                                 for (Image image : album.getImages()) {
1479                                         if (!image.isInserted()) {
1480                                                 continue;
1481                                         }
1482                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1483                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1484                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1485                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1486                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1487                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1488                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1489                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1490                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1491                                 }
1492                         }
1493                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1494
1495                         /* save options. */
1496                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().isAutoFollow());
1497                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().isSoneInsertNotificationEnabled());
1498                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().isShowNewSoneNotifications());
1499                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().isShowNewPostNotifications());
1500                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().isShowNewReplyNotifications());
1501                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().getShowCustomAvatars().name());
1502                         configuration.getStringValue(sonePrefix + "/Options/LoadLinkedImages").setValue(sone.getOptions().getLoadLinkedImages().name());
1503
1504                         configuration.save();
1505
1506                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1507
1508                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1509                 } catch (ConfigurationException ce1) {
1510                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1511                 }
1512         }
1513
1514         /**
1515          * Saves the current options.
1516          */
1517         private void saveConfiguration() {
1518                 synchronized (configuration) {
1519                         if (storingConfiguration) {
1520                                 logger.log(Level.FINE, "Already storing configuration…");
1521                                 return;
1522                         }
1523                         storingConfiguration = true;
1524                 }
1525
1526                 /* store the options first. */
1527                 try {
1528                         preferences.saveTo(configuration);
1529
1530                         /* save known Sones. */
1531                         int soneCounter = 0;
1532                         synchronized (knownSones) {
1533                                 for (String knownSoneId : knownSones) {
1534                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1535                                 }
1536                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1537                         }
1538
1539                         /* save known posts. */
1540                         database.save();
1541
1542                         /* now save it. */
1543                         configuration.save();
1544
1545                 } catch (ConfigurationException ce1) {
1546                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1547                 } catch (DatabaseException de1) {
1548                         logger.log(Level.SEVERE, "Could not save database!", de1);
1549                 } finally {
1550                         synchronized (configuration) {
1551                                 storingConfiguration = false;
1552                         }
1553                 }
1554         }
1555
1556         /**
1557          * Loads the configuration.
1558          */
1559         private void loadConfiguration() {
1560                 new PreferencesLoader(preferences).loadFrom(configuration);
1561
1562                 /* load known Sones. */
1563                 int soneCounter = 0;
1564                 while (true) {
1565                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1566                         if (knownSoneId == null) {
1567                                 break;
1568                         }
1569                         synchronized (knownSones) {
1570                                 knownSones.add(knownSoneId);
1571                         }
1572                 }
1573         }
1574
1575         /**
1576          * Notifies the core that a new {@link OwnIdentity} was added.
1577          *
1578          * @param ownIdentityAddedEvent
1579          *            The event
1580          */
1581         @Subscribe
1582         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1583                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1584                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1585                 if (ownIdentity.hasContext("Sone")) {
1586                         addLocalSone(ownIdentity);
1587                 }
1588         }
1589
1590         /**
1591          * Notifies the core that an {@link OwnIdentity} was removed.
1592          *
1593          * @param ownIdentityRemovedEvent
1594          *            The event
1595          */
1596         @Subscribe
1597         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1598                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1599                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1600                 trustedIdentities.removeAll(ownIdentity);
1601         }
1602
1603         /**
1604          * Notifies the core that a new {@link Identity} was added.
1605          *
1606          * @param identityAddedEvent
1607          *            The event
1608          */
1609         @Subscribe
1610         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1611                 Identity identity = identityAddedEvent.identity();
1612                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1613                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1614                 addRemoteSone(identity);
1615         }
1616
1617         /**
1618          * Notifies the core that an {@link Identity} was updated.
1619          *
1620          * @param identityUpdatedEvent
1621          *            The event
1622          */
1623         @Subscribe
1624         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1625                 Identity identity = identityUpdatedEvent.identity();
1626                 final Sone sone = getRemoteSone(identity.getId());
1627                 if (sone.isLocal()) {
1628                         return;
1629                 }
1630                 String newLatestEdition = identity.getProperty("Sone.LatestEdition");
1631                 if (newLatestEdition != null) {
1632                         Long parsedNewLatestEdition = tryParse(newLatestEdition);
1633                         if (parsedNewLatestEdition != null) {
1634                                 sone.setLatestEdition(parsedNewLatestEdition);
1635                         }
1636                 }
1637                 soneDownloader.addSone(sone);
1638                 soneDownloaders.execute(soneDownloader.fetchSoneAsSskAction(sone));
1639         }
1640
1641         /**
1642          * Notifies the core that an {@link Identity} was removed.
1643          *
1644          * @param identityRemovedEvent
1645          *            The event
1646          */
1647         @Subscribe
1648         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1649                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1650                 Identity identity = identityRemovedEvent.identity();
1651                 trustedIdentities.remove(ownIdentity, identity);
1652                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1653                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1654                                 continue;
1655                         }
1656                         if (trustedIdentity.getValue().contains(identity)) {
1657                                 return;
1658                         }
1659                 }
1660                 Sone sone = getSone(identity.getId());
1661                 if (sone == null) {
1662                         /* TODO - we don’t have the Sone anymore. should this happen? */
1663                         return;
1664                 }
1665                 for (PostReply postReply : sone.getReplies()) {
1666                         eventBus.post(new PostReplyRemovedEvent(postReply));
1667                 }
1668                 for (Post post : sone.getPosts()) {
1669                         eventBus.post(new PostRemovedEvent(post));
1670                 }
1671                 eventBus.post(new SoneRemovedEvent(sone));
1672                 database.removeSone(sone);
1673         }
1674
1675         /**
1676          * Deletes the temporary image.
1677          *
1678          * @param imageInsertFinishedEvent
1679          *            The event
1680          */
1681         @Subscribe
1682         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1683                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
1684                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
1685                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
1686                 touchConfiguration();
1687         }
1688
1689         @VisibleForTesting
1690         class MarkPostKnown implements Runnable {
1691
1692                 private final Post post;
1693
1694                 public MarkPostKnown(Post post) {
1695                         this.post = post;
1696                 }
1697
1698                 @Override
1699                 public void run() {
1700                         markPostKnown(post);
1701                 }
1702
1703         }
1704
1705         @VisibleForTesting
1706         class MarkReplyKnown implements Runnable {
1707
1708                 private final PostReply postReply;
1709
1710                 public MarkReplyKnown(PostReply postReply) {
1711                         this.postReply = postReply;
1712                 }
1713
1714                 @Override
1715                 public void run() {
1716                         markReplyKnown(postReply);
1717                 }
1718
1719         }
1720
1721 }