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

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2020 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 import static net.pterodactylus.sone.data.AlbumsKt.getAllImages;
  28
  29 import java.util.ArrayList;
  30 import java.util.Collection;
  31 import java.util.HashMap;
  32 import java.util.HashSet;
  33 import java.util.List;
  34 import java.util.Map;
  35 import java.util.Map.Entry;
  36 import java.util.Set;
  37 import java.util.concurrent.ExecutorService;
  38 import java.util.concurrent.Executors;
  39 import java.util.concurrent.ScheduledExecutorService;
  40 import java.util.concurrent.TimeUnit;
  41 import java.util.concurrent.atomic.*;
  42 import java.util.logging.Level;
  43 import java.util.logging.Logger;
  44
  45 import javax.annotation.Nonnull;
  46 import javax.annotation.Nullable;
  47
  48 import com.codahale.metrics.*;
  49 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidAlbumFound;
  50 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidImageFound;
  51 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidParentAlbumFound;
  52 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostFound;
  53 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostReplyFound;
  54 import net.pterodactylus.sone.core.event.*;
  55 import net.pterodactylus.sone.data.Album;
  56 import net.pterodactylus.sone.data.Client;
  57 import net.pterodactylus.sone.data.Image;
  58 import net.pterodactylus.sone.data.Post;
  59 import net.pterodactylus.sone.data.PostReply;
  60 import net.pterodactylus.sone.data.Profile;
  61 import net.pterodactylus.sone.data.Profile.Field;
  62 import net.pterodactylus.sone.data.Reply;
  63 import net.pterodactylus.sone.data.Sone;
  64 import net.pterodactylus.sone.data.Sone.SoneStatus;
  65 import net.pterodactylus.sone.data.SoneOptions.LoadExternalContent;
  66 import net.pterodactylus.sone.data.TemporaryImage;
  67 import net.pterodactylus.sone.database.AlbumBuilder;
  68 import net.pterodactylus.sone.database.Database;
  69 import net.pterodactylus.sone.database.DatabaseException;
  70 import net.pterodactylus.sone.database.ImageBuilder;
  71 import net.pterodactylus.sone.database.PostBuilder;
  72 import net.pterodactylus.sone.database.PostProvider;
  73 import net.pterodactylus.sone.database.PostReplyBuilder;
  74 import net.pterodactylus.sone.database.PostReplyProvider;
  75 import net.pterodactylus.sone.database.SoneBuilder;
  76 import net.pterodactylus.sone.database.SoneProvider;
  77 import net.pterodactylus.sone.freenet.wot.Identity;
  78 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  79 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  83 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  84 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  85 import net.pterodactylus.sone.main.SonePlugin;
  86 import net.pterodactylus.util.config.Configuration;
  87 import net.pterodactylus.util.config.ConfigurationException;
  88 import net.pterodactylus.util.service.AbstractService;
  89 import net.pterodactylus.util.thread.NamedThreadFactory;
  90
  91 import com.google.common.annotations.VisibleForTesting;
  92 import com.google.common.base.Stopwatch;
  93 import com.google.common.collect.FluentIterable;
  94 import com.google.common.collect.HashMultimap;
  95 import com.google.common.collect.Multimap;
  96 import com.google.common.collect.Multimaps;
  97 import com.google.common.eventbus.EventBus;
  98 import com.google.common.eventbus.Subscribe;
  99 import com.google.inject.Inject;
 100 import com.google.inject.Singleton;
 101 import kotlin.jvm.functions.Function1;
 102
 103 /**
 104  * The Sone core.
 105  */
 106 @Singleton
 107 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 108
 109         /** The logger. */
 110         private static final Logger logger = getLogger(Core.class.getName());
 111
 112         /** The start time. */
 113         private final long startupTime = System.currentTimeMillis();
 114
 115         private final AtomicBoolean debug = new AtomicBoolean(false);
 116
 117         /** The preferences. */
 118         private final Preferences preferences;
 119
 120         /** The event bus. */
 121         private final EventBus eventBus;
 122
 123         /** The configuration. */
 124         private final Configuration configuration;
 125
 126         /** Whether we’re currently saving the configuration. */
 127         private boolean storingConfiguration = false;
 128
 129         /** The identity manager. */
 130         private final IdentityManager identityManager;
 131
 132         /** Interface to freenet. */
 133         private final FreenetInterface freenetInterface;
 134
 135         /** The Sone downloader. */
 136         private final SoneDownloader soneDownloader;
 137
 138         /** The image inserter. */
 139         private final ImageInserter imageInserter;
 140
 141         /** Sone downloader thread-pool. */
 142         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 143
 144         /** The update checker. */
 145         private final UpdateChecker updateChecker;
 146
 147         /** The trust updater. */
 148         private final WebOfTrustUpdater webOfTrustUpdater;
 149
 150         /** Locked local Sones. */
 151         /* synchronize on itself. */
 152         private final Set<Sone> lockedSones = new HashSet<>();
 153
 154         /** Sone inserters. */
 155         /* synchronize access on this on sones. */
 156         private final Map<Sone, SoneInserter> soneInserters = new HashMap<>();
 157
 158         /** Sone rescuers. */
 159         /* synchronize access on this on sones. */
 160         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<>();
 161
 162         /** All known Sones. */
 163         private final Set<String> knownSones = new HashSet<>();
 164
 165         /** The post database. */
 166         private final Database database;
 167
 168         /** Trusted identities, sorted by own identities. */
 169         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 170
 171         /** All temporary images. */
 172         private final Map<String, TemporaryImage> temporaryImages = new HashMap<>();
 173
 174         /** Ticker for threads that mark own elements as known. */
 175         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 176
 177         /** The time the configuration was last touched. */
 178         private volatile long lastConfigurationUpdate;
 179
 180         private final MetricRegistry metricRegistry;
 181         private final Histogram configurationSaveTimeHistogram;
 182
 183         @Inject
 184         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database, MetricRegistry metricRegistry) {
 185                 super("Sone Core");
 186                 this.configuration = configuration;
 187                 this.freenetInterface = freenetInterface;
 188                 this.identityManager = identityManager;
 189                 this.soneDownloader = soneDownloader;
 190                 this.imageInserter = imageInserter;
 191                 this.updateChecker = updateChecker;
 192                 this.webOfTrustUpdater = webOfTrustUpdater;
 193                 this.eventBus = eventBus;
 194                 this.database = database;
 195                 this.metricRegistry = metricRegistry;
 196                 preferences = new Preferences(eventBus);
 197                 this.configurationSaveTimeHistogram = metricRegistry.histogram("configuration.save.duration", () -> new Histogram(new ExponentiallyDecayingReservoir(3000, 0)));
 198         }
 199
 200         //
 201         // ACCESSORS
 202         //
 203
 204         /**
 205          * Returns the time Sone was started.
 206          *
 207          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 208          */
 209         public long getStartupTime() {
 210                 return startupTime;
 211         }
 212
 213         @Nonnull
 214         public boolean getDebug() {
 215                 return debug.get();
 216         }
 217
 218         public void setDebug() {
 219                 debug.set(true);
 220                 eventBus.post(new DebugActivatedEvent());
 221         }
 222
 223         /**
 224          * Returns the options used by the core.
 225          *
 226          * @return The options of the core
 227          */
 228         public Preferences getPreferences() {
 229                 return preferences;
 230         }
 231
 232         /**
 233          * Returns the identity manager used by the core.
 234          *
 235          * @return The identity manager
 236          */
 237         public IdentityManager getIdentityManager() {
 238                 return identityManager;
 239         }
 240
 241         /**
 242          * Returns the update checker.
 243          *
 244          * @return The update checker
 245          */
 246         public UpdateChecker getUpdateChecker() {
 247                 return updateChecker;
 248         }
 249
 250         /**
 251          * Returns the Sone rescuer for the given local Sone.
 252          *
 253          * @param sone
 254          *            The local Sone to get the rescuer for
 255          * @return The Sone rescuer for the given Sone
 256          */
 257         public SoneRescuer getSoneRescuer(Sone sone) {
 258                 checkNotNull(sone, "sone must not be null");
 259                 checkArgument(sone.isLocal(), "sone must be local");
 260                 synchronized (soneRescuers) {
 261                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 262                         if (soneRescuer == null) {
 263                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 264                                 soneRescuers.put(sone, soneRescuer);
 265                                 soneRescuer.start();
 266                         }
 267                         return soneRescuer;
 268                 }
 269         }
 270
 271         /**
 272          * Returns whether the given Sone is currently locked.
 273          *
 274          * @param sone
 275          *            The sone to check
 276          * @return {@code true} if the Sone is locked, {@code false} if it is not
 277          */
 278         public boolean isLocked(Sone sone) {
 279                 synchronized (lockedSones) {
 280                         return lockedSones.contains(sone);
 281                 }
 282         }
 283
 284         public SoneBuilder soneBuilder() {
 285                 return database.newSoneBuilder();
 286         }
 287
 288         /**
 289          * {@inheritDocs}
 290          */
 291         @Nonnull
 292         @Override
 293         public Collection<Sone> getSones() {
 294                 return database.getSones();
 295         }
 296
 297         @Nonnull
 298         @Override
 299         public Function1<String, Sone> getSoneLoader() {
 300                 return database.getSoneLoader();
 301         }
 302
 303         /**
 304          * Returns the Sone with the given ID, regardless whether it’s local or
 305          * remote.
 306          *
 307          * @param id
 308          *            The ID of the Sone to get
 309          * @return The Sone with the given ID, or {@code null} if there is no such
 310          *         Sone
 311          */
 312         @Override
 313         @Nullable
 314         public Sone getSone(@Nonnull String id) {
 315                 return database.getSone(id);
 316         }
 317
 318         /**
 319          * {@inheritDocs}
 320          */
 321         @Override
 322         public Collection<Sone> getLocalSones() {
 323                 return database.getLocalSones();
 324         }
 325
 326         /**
 327          * Returns the local Sone with the given ID, optionally creating a new Sone.
 328          *
 329          * @param id
 330          *            The ID of the Sone
 331          * @return The Sone with the given ID, or {@code null}
 332          */
 333         public Sone getLocalSone(String id) {
 334                 Sone sone = database.getSone(id);
 335                 if ((sone != null) && sone.isLocal()) {
 336                         return sone;
 337                 }
 338                 return null;
 339         }
 340
 341         /**
 342          * {@inheritDocs}
 343          */
 344         @Override
 345         public Collection<Sone> getRemoteSones() {
 346                 return database.getRemoteSones();
 347         }
 348
 349         /**
 350          * Returns the remote Sone with the given ID.
 351          *
 352          *
 353          * @param id
 354          *            The ID of the remote Sone to get
 355          * @return The Sone with the given ID
 356          */
 357         public Sone getRemoteSone(String id) {
 358                 return database.getSone(id);
 359         }
 360
 361         /**
 362          * Returns whether the given Sone has been modified.
 363          *
 364          * @param sone
 365          *            The Sone to check for modifications
 366          * @return {@code true} if a modification has been detected in the Sone,
 367          *         {@code false} otherwise
 368          */
 369         public boolean isModifiedSone(Sone sone) {
 370                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 371         }
 372
 373         /**
 374          * Returns a post builder.
 375          *
 376          * @return A new post builder
 377          */
 378         public PostBuilder postBuilder() {
 379                 return database.newPostBuilder();
 380         }
 381
 382         @Nullable
 383         @Override
 384         public Post getPost(@Nonnull String postId) {
 385                 return database.getPost(postId);
 386         }
 387
 388         /**
 389          * {@inheritDocs}
 390          */
 391         @Override
 392         public Collection<Post> getPosts(String soneId) {
 393                 return database.getPosts(soneId);
 394         }
 395
 396         /**
 397          * {@inheritDoc}
 398          */
 399         @Override
 400         public Collection<Post> getDirectedPosts(final String recipientId) {
 401                 checkNotNull(recipientId, "recipient must not be null");
 402                 return database.getDirectedPosts(recipientId);
 403         }
 404
 405         /**
 406          * Returns a post reply builder.
 407          *
 408          * @return A new post reply builder
 409          */
 410         public PostReplyBuilder postReplyBuilder() {
 411                 return database.newPostReplyBuilder();
 412         }
 413
 414         /**
 415          * {@inheritDoc}
 416          */
 417         @Nullable
 418         @Override
 419         public PostReply getPostReply(String replyId) {
 420                 return database.getPostReply(replyId);
 421         }
 422
 423         /**
 424          * {@inheritDoc}
 425          */
 426         @Override
 427         public List<PostReply> getReplies(final String postId) {
 428                 return database.getReplies(postId);
 429         }
 430
 431         /**
 432          * Returns all Sones that have liked the given post.
 433          *
 434          * @param post
 435          *            The post to get the liking Sones for
 436          * @return The Sones that like the given post
 437          */
 438         public Set<Sone> getLikes(Post post) {
 439                 Set<Sone> sones = new HashSet<>();
 440                 for (Sone sone : getSones()) {
 441                         if (sone.getLikedPostIds().contains(post.getId())) {
 442                                 sones.add(sone);
 443                         }
 444                 }
 445                 return sones;
 446         }
 447
 448         /**
 449          * Returns all Sones that have liked the given reply.
 450          *
 451          * @param reply
 452          *            The reply to get the liking Sones for
 453          * @return The Sones that like the given reply
 454          */
 455         public Set<Sone> getLikes(PostReply reply) {
 456                 Set<Sone> sones = new HashSet<>();
 457                 for (Sone sone : getSones()) {
 458                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 459                                 sones.add(sone);
 460                         }
 461                 }
 462                 return sones;
 463         }
 464
 465         /**
 466          * Returns whether the given post is bookmarked.
 467          *
 468          * @param post
 469          *            The post to check
 470          * @return {@code true} if the given post is bookmarked, {@code false}
 471          *         otherwise
 472          */
 473         public boolean isBookmarked(Post post) {
 474                 return database.isPostBookmarked(post);
 475         }
 476
 477         /**
 478          * Returns all currently known bookmarked posts.
 479          *
 480          * @return All bookmarked posts
 481          */
 482         public Set<Post> getBookmarkedPosts() {
 483                 return database.getBookmarkedPosts();
 484         }
 485
 486         public AlbumBuilder albumBuilder() {
 487                 return database.newAlbumBuilder();
 488         }
 489
 490         /**
 491          * Returns the album with the given ID, optionally creating a new album if
 492          * an album with the given ID can not be found.
 493          *
 494          * @param albumId
 495          *            The ID of the album
 496          * @return The album with the given ID, or {@code null} if no album with the
 497          *         given ID exists
 498          */
 499         @Nullable
 500         public Album getAlbum(@Nonnull String albumId) {
 501                 return database.getAlbum(albumId);
 502         }
 503
 504         public ImageBuilder imageBuilder() {
 505                 return database.newImageBuilder();
 506         }
 507
 508         /**
 509          * Returns the image with the given ID, creating it if necessary.
 510          *
 511          * @param imageId
 512          *            The ID of the image
 513          * @return The image with the given ID
 514          */
 515         @Nullable
 516         public Image getImage(String imageId) {
 517                 return getImage(imageId, true);
 518         }
 519
 520         /**
 521          * Returns the image with the given ID, optionally creating it if it does
 522          * not exist.
 523          *
 524          * @param imageId
 525          *            The ID of the image
 526          * @param create
 527          *            {@code true} to create an image if none exists with the given
 528          *            ID
 529          * @return The image with the given ID, or {@code null} if none exists and
 530          *         none was created
 531          */
 532         @Nullable
 533         public Image getImage(String imageId, boolean create) {
 534                 Image image = database.getImage(imageId);
 535                 if (image != null) {
 536                         return image;
 537                 }
 538                 if (!create) {
 539                         return null;
 540                 }
 541                 Image newImage = database.newImageBuilder().withId(imageId).build();
 542                 database.storeImage(newImage);
 543                 return newImage;
 544         }
 545
 546         /**
 547          * Returns the temporary image with the given ID.
 548          *
 549          * @param imageId
 550          *            The ID of the temporary image
 551          * @return The temporary image, or {@code null} if there is no temporary
 552          *         image with the given ID
 553          */
 554         public TemporaryImage getTemporaryImage(String imageId) {
 555                 synchronized (temporaryImages) {
 556                         return temporaryImages.get(imageId);
 557                 }
 558         }
 559
 560         //
 561         // ACTIONS
 562         //
 563
 564         /**
 565          * Locks the given Sone. A locked Sone will not be inserted by
 566          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 567          * again.
 568          *
 569          * @param sone
 570          *            The sone to lock
 571          */
 572         public void lockSone(Sone sone) {
 573                 synchronized (lockedSones) {
 574                         if (lockedSones.add(sone)) {
 575                                 eventBus.post(new SoneLockedEvent(sone));
 576                         }
 577                 }
 578         }
 579
 580         /**
 581          * Unlocks the given Sone.
 582          *
 583          * @see #lockSone(Sone)
 584          * @param sone
 585          *            The sone to unlock
 586          */
 587         public void unlockSone(Sone sone) {
 588                 synchronized (lockedSones) {
 589                         if (lockedSones.remove(sone)) {
 590                                 eventBus.post(new SoneUnlockedEvent(sone));
 591                         }
 592                 }
 593         }
 594
 595         /**
 596          * Adds a local Sone from the given own identity.
 597          *
 598          * @param ownIdentity
 599          *            The own identity to create a Sone from
 600          * @return The added (or already existing) Sone
 601          */
 602         public Sone addLocalSone(OwnIdentity ownIdentity) {
 603                 if (ownIdentity == null) {
 604                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 605                         return null;
 606                 }
 607                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 608                 Sone sone = database.newSoneBuilder().local().from(ownIdentity).build();
 609                 String property = fromNullable(ownIdentity.getProperty("Sone.LatestEdition")).or("0");
 610                 sone.setLatestEdition(fromNullable(tryParse(property)).or(0L));
 611                 sone.setClient(new Client("Sone", SonePlugin.getPluginVersion()));
 612                 sone.setKnown(true);
 613                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, metricRegistry, ownIdentity.getId());
 614                 soneInserter.insertionDelayChanged(new InsertionDelayChangedEvent(preferences.getInsertionDelay()));
 615                 eventBus.register(soneInserter);
 616                 synchronized (soneInserters) {
 617                         soneInserters.put(sone, soneInserter);
 618                 }
 619                 loadSone(sone);
 620                 database.storeSone(sone);
 621                 sone.setStatus(SoneStatus.idle);
 622                 if (sone.getPosts().isEmpty() && sone.getReplies().isEmpty() && getAllImages(sone.getRootAlbum()).isEmpty()) {
 623                         // dirty hack
 624                         lockSone(sone);
 625                         eventBus.post(new SoneLockedOnStartup(sone));
 626                 }
 627                 soneInserter.start();
 628                 return sone;
 629         }
 630
 631         /**
 632          * Creates a new Sone for the given own identity.
 633          *
 634          * @param ownIdentity
 635          *            The own identity to create a Sone for
 636          * @return The created Sone
 637          */
 638         public Sone createSone(OwnIdentity ownIdentity) {
 639                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 640                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 641                         return null;
 642                 }
 643                 Sone sone = addLocalSone(ownIdentity);
 644
 645                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 646                 touchConfiguration();
 647                 return sone;
 648         }
 649
 650         /**
 651          * Adds the Sone of the given identity.
 652          *
 653          * @param identity
 654          *            The identity whose Sone to add
 655          * @return The added or already existing Sone
 656          */
 657         public Sone addRemoteSone(Identity identity) {
 658                 if (identity == null) {
 659                         logger.log(Level.WARNING, "Given Identity is null!");
 660                         return null;
 661                 }
 662                 String property = fromNullable(identity.getProperty("Sone.LatestEdition")).or("0");
 663                 long latestEdition = fromNullable(tryParse(property)).or(0L);
 664                 Sone existingSone = getSone(identity.getId());
 665                 if ((existingSone != null )&& existingSone.isLocal()) {
 666                         return existingSone;
 667                 }
 668                 boolean newSone = existingSone == null;
 669                 Sone sone = !newSone ? existingSone : database.newSoneBuilder().from(identity).build();
 670                 sone.setLatestEdition(latestEdition);
 671                 if (newSone) {
 672                         synchronized (knownSones) {
 673                                 newSone = !knownSones.contains(sone.getId());
 674                         }
 675                         sone.setKnown(!newSone);
 676                         if (newSone) {
 677                                 eventBus.post(new NewSoneFoundEvent(sone));
 678                                 for (Sone localSone : getLocalSones()) {
 679                                         if (localSone.getOptions().isAutoFollow()) {
 680                                                 followSone(localSone, sone.getId());
 681                                         }
 682                                 }
 683                         }
 684                 }
 685                 database.storeSone(sone);
 686                 soneDownloader.addSone(sone);
 687                 soneDownloaders.execute(soneDownloader.fetchSoneAsUskAction(sone));
 688                 return sone;
 689         }
 690
 691         /**
 692          * Lets the given local Sone follow the Sone with the given ID.
 693          *
 694          * @param sone
 695          *            The local Sone that should follow another Sone
 696          * @param soneId
 697          *            The ID of the Sone to follow
 698          */
 699         public void followSone(Sone sone, String soneId) {
 700                 checkNotNull(sone, "sone must not be null");
 701                 checkNotNull(soneId, "soneId must not be null");
 702                 database.addFriend(sone, soneId);
 703                 @SuppressWarnings("ConstantConditions") // we just followed, this can’t be null.
 704                 long now = database.getFollowingTime(soneId);
 705                 Sone followedSone = getSone(soneId);
 706                 if (followedSone == null) {
 707                         return;
 708                 }
 709                 for (Post post : followedSone.getPosts()) {
 710                         if (post.getTime() < now) {
 711                                 markPostKnown(post);
 712                         }
 713                 }
 714                 for (PostReply reply : followedSone.getReplies()) {
 715                         if (reply.getTime() < now) {
 716                                 markReplyKnown(reply);
 717                         }
 718                 }
 719                 touchConfiguration();
 720         }
 721
 722         /**
 723          * Lets the given local Sone unfollow the Sone with the given ID.
 724          *
 725          * @param sone
 726          *            The local Sone that should unfollow another Sone
 727          * @param soneId
 728          *            The ID of the Sone being unfollowed
 729          */
 730         public void unfollowSone(Sone sone, String soneId) {
 731                 checkNotNull(sone, "sone must not be null");
 732                 checkNotNull(soneId, "soneId must not be null");
 733                 database.removeFriend(sone, soneId);
 734                 touchConfiguration();
 735         }
 736
 737         /**
 738          * Updates the stored Sone with the given Sone.
 739          *
 740          * @param sone
 741          *            The updated Sone
 742          */
 743         public void updateSone(Sone sone) {
 744                 updateSone(sone, false);
 745         }
 746
 747         /**
 748          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 749          * {@code true}, an older Sone than the current Sone can be given to restore
 750          * an old state.
 751          *
 752          * @param sone
 753          *            The Sone to update
 754          * @param soneRescueMode
 755          *            {@code true} if the stored Sone should be updated regardless
 756          *            of the age of the given Sone
 757          */
 758         public void updateSone(final Sone sone, boolean soneRescueMode) {
 759                 Sone storedSone = getSone(sone.getId());
 760                 if (storedSone != null) {
 761                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
 762                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 763                                 return;
 764                         }
 765                         List<Object> events =
 766                                         collectEventsForChangesInSone(storedSone, sone);
 767                         database.storeSone(sone);
 768                         for (Object event : events) {
 769                                 eventBus.post(event);
 770                         }
 771                         sone.setOptions(storedSone.getOptions());
 772                         sone.setKnown(storedSone.isKnown());
 773                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 774                         if (sone.isLocal()) {
 775                                 touchConfiguration();
 776                         }
 777                 }
 778         }
 779
 780         private List<Object> collectEventsForChangesInSone(Sone oldSone, Sone newSone) {
 781                 List<Object> events = new ArrayList<>();
 782                 SoneComparison soneComparison = new SoneComparison(oldSone, newSone);
 783                 for (Post newPost : soneComparison.getNewPosts()) {
 784                         if (newPost.getSone().equals(newSone)) {
 785                                 newPost.setKnown(true);
 786                         } else if (newPost.getTime() < database.getFollowingTime(newSone.getId())) {
 787                                 newPost.setKnown(true);
 788                         } else if (!newPost.isKnown()) {
 789                                 events.add(new NewPostFoundEvent(newPost));
 790                         }
 791                 }
 792                 for (Post post : soneComparison.getRemovedPosts()) {
 793                         events.add(new PostRemovedEvent(post));
 794                 }
 795                 for (PostReply postReply : soneComparison.getNewPostReplies()) {
 796                         if (postReply.getSone().equals(newSone)) {
 797                                 postReply.setKnown(true);
 798                         } else if (postReply.getTime() < database.getFollowingTime(newSone.getId())) {
 799                                 postReply.setKnown(true);
 800                         } else if (!postReply.isKnown()) {
 801                                 events.add(new NewPostReplyFoundEvent(postReply));
 802                         }
 803                 }
 804                 for (PostReply postReply : soneComparison.getRemovedPostReplies()) {
 805                         events.add(new PostReplyRemovedEvent(postReply));
 806                 }
 807                 return events;
 808         }
 809
 810         /**
 811          * Deletes the given Sone. This will remove the Sone from the
 812          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 813          * remove the context from its identity.
 814          *
 815          * @param sone
 816          *            The Sone to delete
 817          */
 818         public void deleteSone(Sone sone) {
 819                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 820                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 821                         return;
 822                 }
 823                 if (!getLocalSones().contains(sone)) {
 824                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 825                         return;
 826                 }
 827                 SoneInserter soneInserter = soneInserters.remove(sone);
 828                 soneInserter.stop();
 829                 database.removeSone(sone);
 830                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 831                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 832                 try {
 833                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 834                 } catch (ConfigurationException ce1) {
 835                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 836                 }
 837         }
 838
 839         /**
 840          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 841          * known} before, a {@link MarkSoneKnownEvent} is fired.
 842          *
 843          * @param sone
 844          *            The Sone to mark as known
 845          */
 846         public void markSoneKnown(Sone sone) {
 847                 if (!sone.isKnown()) {
 848                         sone.setKnown(true);
 849                         synchronized (knownSones) {
 850                                 knownSones.add(sone.getId());
 851                         }
 852                         eventBus.post(new MarkSoneKnownEvent(sone));
 853                         touchConfiguration();
 854                 }
 855         }
 856
 857         /**
 858          * Loads and updates the given Sone from the configuration. If any error is
 859          * encountered, loading is aborted and the given Sone is not changed.
 860          *
 861          * @param sone
 862          *            The Sone to load and update
 863          */
 864         public void loadSone(Sone sone) {
 865                 if (!sone.isLocal()) {
 866                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
 867                         return;
 868                 }
 869                 logger.info(String.format("Loading local Sone: %s", sone));
 870
 871                 /* load Sone. */
 872                 String sonePrefix = "Sone/" + sone.getId();
 873                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 874                 if (soneTime == null) {
 875                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 876                         return;
 877                 }
 878                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 879
 880                 /* load profile. */
 881                 ConfigurationSoneParser configurationSoneParser = new ConfigurationSoneParser(configuration, sone);
 882                 Profile profile = configurationSoneParser.parseProfile();
 883
 884                 /* load posts. */
 885                 Collection<Post> posts;
 886                 try {
 887                         posts = configurationSoneParser.parsePosts(database);
 888                 } catch (InvalidPostFound ipf) {
 889                         logger.log(Level.WARNING, "Invalid post found, aborting load!");
 890                         return;
 891                 }
 892
 893                 /* load replies. */
 894                 Collection<PostReply> replies;
 895                 try {
 896                         replies = configurationSoneParser.parsePostReplies(database);
 897                 } catch (InvalidPostReplyFound iprf) {
 898                         logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 899                         return;
 900                 }
 901
 902                 /* load post likes. */
 903                 Set<String> likedPostIds =
 904                                 configurationSoneParser.parseLikedPostIds();
 905
 906                 /* load reply likes. */
 907                 Set<String> likedReplyIds =
 908                                 configurationSoneParser.parseLikedPostReplyIds();
 909
 910                 /* load albums. */
 911                 List<Album> topLevelAlbums;
 912                 try {
 913                         topLevelAlbums =
 914                                         configurationSoneParser.parseTopLevelAlbums(database);
 915                 } catch (InvalidAlbumFound iaf) {
 916                         logger.log(Level.WARNING, "Invalid album found, aborting load!");
 917                         return;
 918                 } catch (InvalidParentAlbumFound ipaf) {
 919                         logger.log(Level.WARNING, format("Invalid parent album ID: %s",
 920                                         ipaf.getAlbumParentId()));
 921                         return;
 922                 }
 923
 924                 /* load images. */
 925                 try {
 926                         configurationSoneParser.parseImages(database);
 927                 } catch (InvalidImageFound iif) {
 928                         logger.log(WARNING, "Invalid image found, aborting load!");
 929                         return;
 930                 } catch (InvalidParentAlbumFound ipaf) {
 931                         logger.log(Level.WARNING,
 932                                         format("Invalid album image (%s) encountered, aborting load!",
 933                                                         ipaf.getAlbumParentId()));
 934                         return;
 935                 }
 936
 937                 /* load avatar. */
 938                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
 939                 if (avatarId != null) {
 940                         final Map<String, Image> images =
 941                                         configurationSoneParser.getImages();
 942                         profile.setAvatar(images.get(avatarId));
 943                 }
 944
 945                 /* load options. */
 946                 sone.getOptions().setAutoFollow(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(false));
 947                 sone.getOptions().setSoneInsertNotificationEnabled(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(false));
 948                 sone.getOptions().setShowNewSoneNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(true));
 949                 sone.getOptions().setShowNewPostNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(true));
 950                 sone.getOptions().setShowNewReplyNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(true));
 951                 sone.getOptions().setShowCustomAvatars(LoadExternalContent.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(LoadExternalContent.NEVER.name())));
 952                 sone.getOptions().setLoadLinkedImages(LoadExternalContent.valueOf(configuration.getStringValue(sonePrefix + "/Options/LoadLinkedImages").getValue(LoadExternalContent.NEVER.name())));
 953
 954                 /* if we’re still here, Sone was loaded successfully. */
 955                 synchronized (sone) {
 956                         sone.setTime(soneTime);
 957                         sone.setProfile(profile);
 958                         sone.setPosts(posts);
 959                         sone.setReplies(replies);
 960                         sone.setLikePostIds(likedPostIds);
 961                         sone.setLikeReplyIds(likedReplyIds);
 962                         for (Album album : sone.getRootAlbum().getAlbums()) {
 963                                 sone.getRootAlbum().removeAlbum(album);
 964                         }
 965                         for (Album album : topLevelAlbums) {
 966                                 sone.getRootAlbum().addAlbum(album);
 967                         }
 968                         synchronized (soneInserters) {
 969                                 soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
 970                         }
 971                 }
 972                 for (Post post : posts) {
 973                         post.setKnown(true);
 974                 }
 975                 for (PostReply reply : replies) {
 976                         reply.setKnown(true);
 977                 }
 978
 979                 logger.info(String.format("Sone loaded successfully: %s", sone));
 980         }
 981
 982         /**
 983          * Creates a new post.
 984          *
 985          * @param sone
 986          *            The Sone that creates the post
 987          * @param recipient
 988          *            The recipient Sone, or {@code null} if this post does not have
 989          *            a recipient
 990          * @param text
 991          *            The text of the post
 992          * @return The created post
 993          */
 994         public Post createPost(Sone sone, @Nullable Sone recipient, String text) {
 995                 checkNotNull(text, "text must not be null");
 996                 checkArgument(text.trim().length() > 0, "text must not be empty");
 997                 if (!sone.isLocal()) {
 998                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
 999                         return null;
1000                 }
1001                 PostBuilder postBuilder = database.newPostBuilder();
1002                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
1003                 if (recipient != null) {
1004                         postBuilder.to(recipient.getId());
1005                 }
1006                 final Post post = postBuilder.build();
1007                 database.storePost(post);
1008                 eventBus.post(new NewPostFoundEvent(post));
1009                 sone.addPost(post);
1010                 touchConfiguration();
1011                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
1012                 return post;
1013         }
1014
1015         /**
1016          * Deletes the given post.
1017          *
1018          * @param post
1019          *            The post to delete
1020          */
1021         public void deletePost(Post post) {
1022                 if (!post.getSone().isLocal()) {
1023                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1024                         return;
1025                 }
1026                 database.removePost(post);
1027                 eventBus.post(new PostRemovedEvent(post));
1028                 markPostKnown(post);
1029                 touchConfiguration();
1030         }
1031
1032         /**
1033          * Marks the given post as known, if it is currently not a known post
1034          * (according to {@link Post#isKnown()}).
1035          *
1036          * @param post
1037          *            The post to mark as known
1038          */
1039         public void markPostKnown(Post post) {
1040                 post.setKnown(true);
1041                 eventBus.post(new MarkPostKnownEvent(post));
1042                 touchConfiguration();
1043                 for (PostReply reply : getReplies(post.getId())) {
1044                         markReplyKnown(reply);
1045                 }
1046         }
1047
1048         public void bookmarkPost(Post post) {
1049                 database.bookmarkPost(post);
1050         }
1051
1052         /**
1053          * Removes the given post from the bookmarks.
1054          *
1055          * @param post
1056          *            The post to unbookmark
1057          */
1058         public void unbookmarkPost(Post post) {
1059                 database.unbookmarkPost(post);
1060         }
1061
1062         /**
1063          * Creates a new reply.
1064          *
1065          * @param sone
1066          *            The Sone that creates the reply
1067          * @param post
1068          *            The post that this reply refers to
1069          * @param text
1070          *            The text of the reply
1071          * @return The created reply
1072          */
1073         public PostReply createReply(Sone sone, Post post, String text) {
1074                 checkNotNull(text, "text must not be null");
1075                 checkArgument(text.trim().length() > 0, "text must not be empty");
1076                 if (!sone.isLocal()) {
1077                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1078                         return null;
1079                 }
1080                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1081                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1082                 final PostReply reply = postReplyBuilder.build();
1083                 database.storePostReply(reply);
1084                 eventBus.post(new NewPostReplyFoundEvent(reply));
1085                 sone.addReply(reply);
1086                 touchConfiguration();
1087                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1088                 return reply;
1089         }
1090
1091         /**
1092          * Deletes the given reply.
1093          *
1094          * @param reply
1095          *            The reply to delete
1096          */
1097         public void deleteReply(PostReply reply) {
1098                 Sone sone = reply.getSone();
1099                 if (!sone.isLocal()) {
1100                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1101                         return;
1102                 }
1103                 database.removePostReply(reply);
1104                 markReplyKnown(reply);
1105                 sone.removeReply(reply);
1106                 touchConfiguration();
1107         }
1108
1109         /**
1110          * Marks the given reply as known, if it is currently not a known reply
1111          * (according to {@link Reply#isKnown()}).
1112          *
1113          * @param reply
1114          *            The reply to mark as known
1115          */
1116         public void markReplyKnown(PostReply reply) {
1117                 boolean previouslyKnown = reply.isKnown();
1118                 reply.setKnown(true);
1119                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1120                 if (!previouslyKnown) {
1121                         touchConfiguration();
1122                 }
1123         }
1124
1125         /**
1126          * Creates a new album for the given Sone.
1127          *
1128          * @param sone
1129          *            The Sone to create the album for
1130          * @param parent
1131          *            The parent of the album (may be {@code null} to create a
1132          *            top-level album)
1133          * @return The new album
1134          */
1135         public Album createAlbum(Sone sone, Album parent) {
1136                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1137                 database.storeAlbum(album);
1138                 parent.addAlbum(album);
1139                 return album;
1140         }
1141
1142         /**
1143          * Deletes the given album. The owner of the album has to be a local Sone,
1144          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1145          *
1146          * @param album
1147          *            The album to remove
1148          */
1149         public void deleteAlbum(Album album) {
1150                 checkNotNull(album, "album must not be null");
1151                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1152                 if (!album.isEmpty()) {
1153                         return;
1154                 }
1155                 album.getParent().removeAlbum(album);
1156                 database.removeAlbum(album);
1157                 touchConfiguration();
1158         }
1159
1160         /**
1161          * Creates a new image.
1162          *
1163          * @param sone
1164          *            The Sone creating the image
1165          * @param album
1166          *            The album the image will be inserted into
1167          * @param temporaryImage
1168          *            The temporary image to create the image from
1169          * @return The newly created image
1170          */
1171         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1172                 checkNotNull(sone, "sone must not be null");
1173                 checkNotNull(album, "album must not be null");
1174                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1175                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1176                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1177                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1178                 album.addImage(image);
1179                 database.storeImage(image);
1180                 imageInserter.insertImage(temporaryImage, image);
1181                 return image;
1182         }
1183
1184         /**
1185          * Deletes the given image. This method will also delete a matching
1186          * temporary image.
1187          *
1188          * @see #deleteTemporaryImage(String)
1189          * @param image
1190          *            The image to delete
1191          */
1192         public void deleteImage(Image image) {
1193                 checkNotNull(image, "image must not be null");
1194                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1195                 deleteTemporaryImage(image.getId());
1196                 image.getAlbum().removeImage(image);
1197                 database.removeImage(image);
1198                 touchConfiguration();
1199         }
1200
1201         /**
1202          * Creates a new temporary image.
1203          *
1204          * @param mimeType
1205          *            The MIME type of the temporary image
1206          * @param imageData
1207          *            The encoded data of the image
1208          * @return The temporary image
1209          */
1210         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1211                 TemporaryImage temporaryImage = new TemporaryImage();
1212                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1213                 synchronized (temporaryImages) {
1214                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1215                 }
1216                 return temporaryImage;
1217         }
1218
1219         /**
1220          * Deletes the temporary image with the given ID.
1221          *
1222          * @param imageId
1223          *            The ID of the temporary image to delete
1224          */
1225         public void deleteTemporaryImage(String imageId) {
1226                 checkNotNull(imageId, "imageId must not be null");
1227                 synchronized (temporaryImages) {
1228                         temporaryImages.remove(imageId);
1229                 }
1230                 Image image = getImage(imageId, false);
1231                 if (image != null) {
1232                         imageInserter.cancelImageInsert(image);
1233                 }
1234         }
1235
1236         /**
1237          * Notifies the core that the configuration, either of the core or of a
1238          * single local Sone, has changed, and that the configuration should be
1239          * saved.
1240          */
1241         public void touchConfiguration() {
1242                 lastConfigurationUpdate = System.currentTimeMillis();
1243         }
1244
1245         //
1246         // SERVICE METHODS
1247         //
1248
1249         /**
1250          * Starts the core.
1251          */
1252         @Override
1253         public void serviceStart() {
1254                 loadConfiguration();
1255                 updateChecker.start();
1256                 identityManager.start();
1257                 webOfTrustUpdater.init();
1258                 webOfTrustUpdater.start();
1259                 database.startAsync();
1260         }
1261
1262         /**
1263          * {@inheritDoc}
1264          */
1265         @Override
1266         public void serviceRun() {
1267                 long lastSaved = System.currentTimeMillis();
1268                 while (!shouldStop()) {
1269                         sleep(1000);
1270                         long now = System.currentTimeMillis();
1271                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1272                                 for (Sone localSone : getLocalSones()) {
1273                                         saveSone(localSone);
1274                                 }
1275                                 saveConfiguration();
1276                                 lastSaved = now;
1277                         }
1278                 }
1279         }
1280
1281         /**
1282          * Stops the core.
1283          */
1284         @Override
1285         public void serviceStop() {
1286                 localElementTicker.shutdownNow();
1287                 synchronized (soneInserters) {
1288                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1289                                 soneInserter.getValue().stop();
1290                                 Sone latestSone = getLocalSone(soneInserter.getKey().getId());
1291                                 saveSone(latestSone);
1292                         }
1293                 }
1294                 synchronized (soneRescuers) {
1295                         for (SoneRescuer soneRescuer : soneRescuers.values()) {
1296                                 soneRescuer.stop();
1297                         }
1298                 }
1299                 saveConfiguration();
1300                 database.stopAsync();
1301                 webOfTrustUpdater.stop();
1302                 updateChecker.stop();
1303                 soneDownloader.stop();
1304                 soneDownloaders.shutdown();
1305                 identityManager.stop();
1306         }
1307
1308         //
1309         // PRIVATE METHODS
1310         //
1311
1312         /**
1313          * Saves the given Sone. This will persist all local settings for the given
1314          * Sone, such as the friends list and similar, private options.
1315          *
1316          * @param sone
1317          *            The Sone to save
1318          */
1319         private synchronized void saveSone(Sone sone) {
1320                 if (!sone.isLocal()) {
1321                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1322                         return;
1323                 }
1324                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1325                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1326                         return;
1327                 }
1328
1329                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1330                 try {
1331                         /* save Sone into configuration. */
1332                         String sonePrefix = "Sone/" + sone.getId();
1333                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1334                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1335
1336                         /* save profile. */
1337                         Profile profile = sone.getProfile();
1338                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1339                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1340                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1341                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1342                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1343                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1344                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1345
1346                         /* save profile fields. */
1347                         int fieldCounter = 0;
1348                         for (Field profileField : profile.getFields()) {
1349                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1350                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1351                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1352                         }
1353                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1354
1355                         /* save posts. */
1356                         int postCounter = 0;
1357                         for (Post post : sone.getPosts()) {
1358                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1359                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1360                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1361                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1362                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1363                         }
1364                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1365
1366                         /* save replies. */
1367                         int replyCounter = 0;
1368                         for (PostReply reply : sone.getReplies()) {
1369                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1370                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1371                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1372                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1373                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1374                         }
1375                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1376
1377                         /* save post likes. */
1378                         int postLikeCounter = 0;
1379                         for (String postId : sone.getLikedPostIds()) {
1380                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1381                         }
1382                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1383
1384                         /* save reply likes. */
1385                         int replyLikeCounter = 0;
1386                         for (String replyId : sone.getLikedReplyIds()) {
1387                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1388                         }
1389                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1390
1391                         /* save albums. first, collect in a flat structure, top-level first. */
1392                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1393
1394                         int albumCounter = 0;
1395                         for (Album album : albums) {
1396                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1397                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1398                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1399                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1400                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1401                         }
1402                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1403
1404                         /* save images. */
1405                         int imageCounter = 0;
1406                         for (Album album : albums) {
1407                                 for (Image image : album.getImages()) {
1408                                         if (!image.isInserted()) {
1409                                                 continue;
1410                                         }
1411                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1412                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1413                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1414                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1415                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1416                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1417                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1418                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1419                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1420                                 }
1421                         }
1422                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1423
1424                         /* save options. */
1425                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().isAutoFollow());
1426                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().isSoneInsertNotificationEnabled());
1427                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().isShowNewSoneNotifications());
1428                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().isShowNewPostNotifications());
1429                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().isShowNewReplyNotifications());
1430                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().getShowCustomAvatars().name());
1431                         configuration.getStringValue(sonePrefix + "/Options/LoadLinkedImages").setValue(sone.getOptions().getLoadLinkedImages().name());
1432
1433                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1434
1435                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1436                 } catch (ConfigurationException ce1) {
1437                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1438                 }
1439         }
1440
1441         /**
1442          * Saves the current options.
1443          */
1444         private void saveConfiguration() {
1445                 synchronized (configuration) {
1446                         if (storingConfiguration) {
1447                                 logger.log(Level.FINE, "Already storing configuration…");
1448                                 return;
1449                         }
1450                         storingConfiguration = true;
1451                 }
1452
1453                 /* store the options first. */
1454                 try {
1455                         preferences.saveTo(configuration);
1456
1457                         /* save known Sones. */
1458                         int soneCounter = 0;
1459                         synchronized (knownSones) {
1460                                 for (String knownSoneId : knownSones) {
1461                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1462                                 }
1463                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1464                         }
1465
1466                         /* save known posts. */
1467                         database.save();
1468
1469                         /* now save it. */
1470                         Stopwatch stopwatch = Stopwatch.createStarted();
1471                         configuration.save();
1472                         configurationSaveTimeHistogram.update(stopwatch.elapsed(TimeUnit.MICROSECONDS));
1473
1474                 } catch (ConfigurationException ce1) {
1475                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1476                 } catch (DatabaseException de1) {
1477                         logger.log(Level.SEVERE, "Could not save database!", de1);
1478                 } finally {
1479                         synchronized (configuration) {
1480                                 storingConfiguration = false;
1481                         }
1482                 }
1483         }
1484
1485         /**
1486          * Loads the configuration.
1487          */
1488         private void loadConfiguration() {
1489                 new PreferencesLoader(preferences).loadFrom(configuration);
1490
1491                 /* load known Sones. */
1492                 int soneCounter = 0;
1493                 while (true) {
1494                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1495                         if (knownSoneId == null) {
1496                                 break;
1497                         }
1498                         synchronized (knownSones) {
1499                                 knownSones.add(knownSoneId);
1500                         }
1501                 }
1502         }
1503
1504         /**
1505          * Notifies the core that a new {@link OwnIdentity} was added.
1506          *
1507          * @param ownIdentityAddedEvent
1508          *            The event
1509          */
1510         @Subscribe
1511         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1512                 OwnIdentity ownIdentity = ownIdentityAddedEvent.getOwnIdentity();
1513                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1514                 if (ownIdentity.hasContext("Sone")) {
1515                         addLocalSone(ownIdentity);
1516                 }
1517         }
1518
1519         /**
1520          * Notifies the core that an {@link OwnIdentity} was removed.
1521          *
1522          * @param ownIdentityRemovedEvent
1523          *            The event
1524          */
1525         @Subscribe
1526         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1527                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.getOwnIdentity();
1528                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1529                 trustedIdentities.removeAll(ownIdentity);
1530         }
1531
1532         /**
1533          * Notifies the core that a new {@link Identity} was added.
1534          *
1535          * @param identityAddedEvent
1536          *            The event
1537          */
1538         @Subscribe
1539         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1540                 Identity identity = identityAddedEvent.getIdentity();
1541                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1542                 trustedIdentities.put(identityAddedEvent.getOwnIdentity(), identity);
1543                 addRemoteSone(identity);
1544         }
1545
1546         /**
1547          * Notifies the core that an {@link Identity} was updated.
1548          *
1549          * @param identityUpdatedEvent
1550          *            The event
1551          */
1552         @Subscribe
1553         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1554                 Identity identity = identityUpdatedEvent.getIdentity();
1555                 final Sone sone = getRemoteSone(identity.getId());
1556                 if (sone.isLocal()) {
1557                         return;
1558                 }
1559                 String newLatestEdition = identity.getProperty("Sone.LatestEdition");
1560                 if (newLatestEdition != null) {
1561                         Long parsedNewLatestEdition = tryParse(newLatestEdition);
1562                         if (parsedNewLatestEdition != null) {
1563                                 sone.setLatestEdition(parsedNewLatestEdition);
1564                         }
1565                 }
1566                 soneDownloader.addSone(sone);
1567                 soneDownloaders.execute(soneDownloader.fetchSoneAsSskAction(sone));
1568         }
1569
1570         /**
1571          * Notifies the core that an {@link Identity} was removed.
1572          *
1573          * @param identityRemovedEvent
1574          *            The event
1575          */
1576         @Subscribe
1577         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1578                 OwnIdentity ownIdentity = identityRemovedEvent.getOwnIdentity();
1579                 Identity identity = identityRemovedEvent.getIdentity();
1580                 trustedIdentities.remove(ownIdentity, identity);
1581                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1582                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1583                                 continue;
1584                         }
1585                         if (trustedIdentity.getValue().contains(identity)) {
1586                                 return;
1587                         }
1588                 }
1589                 Sone sone = getSone(identity.getId());
1590                 if (sone == null) {
1591                         /* TODO - we don’t have the Sone anymore. should this happen? */
1592                         return;
1593                 }
1594                 for (PostReply postReply : sone.getReplies()) {
1595                         eventBus.post(new PostReplyRemovedEvent(postReply));
1596                 }
1597                 for (Post post : sone.getPosts()) {
1598                         eventBus.post(new PostRemovedEvent(post));
1599                 }
1600                 eventBus.post(new SoneRemovedEvent(sone));
1601                 database.removeSone(sone);
1602         }
1603
1604         /**
1605          * Deletes the temporary image.
1606          *
1607          * @param imageInsertFinishedEvent
1608          *            The event
1609          */
1610         @Subscribe
1611         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1612                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.getImage(), imageInsertFinishedEvent.getResultingUri()));
1613                 imageInsertFinishedEvent.getImage().modify().setKey(imageInsertFinishedEvent.getResultingUri().toString()).update();
1614                 deleteTemporaryImage(imageInsertFinishedEvent.getImage().getId());
1615                 touchConfiguration();
1616         }
1617
1618         @VisibleForTesting
1619         class MarkPostKnown implements Runnable {
1620
1621                 private final Post post;
1622
1623                 public MarkPostKnown(Post post) {
1624                         this.post = post;
1625                 }
1626
1627                 @Override
1628                 public void run() {
1629                         markPostKnown(post);
1630                 }
1631
1632         }
1633
1634         @VisibleForTesting
1635         class MarkReplyKnown implements Runnable {
1636
1637                 private final PostReply postReply;
1638
1639                 public MarkReplyKnown(PostReply postReply) {
1640                         this.postReply = postReply;
1641                 }
1642
1643                 @Override
1644                 public void run() {
1645                         markReplyKnown(postReply);
1646                 }
1647
1648         }
1649
1650 }