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

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2019 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.concurrent.atomic.*;
  41 import java.util.logging.Level;
  42 import java.util.logging.Logger;
  43
  44 import javax.annotation.Nonnull;
  45 import javax.annotation.Nullable;
  46
  47 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidAlbumFound;
  48 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidImageFound;
  49 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidParentAlbumFound;
  50 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostFound;
  51 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostReplyFound;
  52 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  53 import net.pterodactylus.sone.core.event.InsertionDelayChangedEvent;
  54 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  55 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  56 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  57 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  58 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  59 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  60 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  61 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  62 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  63 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  64 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  65 import net.pterodactylus.sone.data.Album;
  66 import net.pterodactylus.sone.data.Client;
  67 import net.pterodactylus.sone.data.Image;
  68 import net.pterodactylus.sone.data.Post;
  69 import net.pterodactylus.sone.data.PostReply;
  70 import net.pterodactylus.sone.data.Profile;
  71 import net.pterodactylus.sone.data.Profile.Field;
  72 import net.pterodactylus.sone.data.Reply;
  73 import net.pterodactylus.sone.data.Sone;
  74 import net.pterodactylus.sone.data.Sone.SoneStatus;
  75 import net.pterodactylus.sone.data.SoneOptions.LoadExternalContent;
  76 import net.pterodactylus.sone.data.TemporaryImage;
  77 import net.pterodactylus.sone.database.AlbumBuilder;
  78 import net.pterodactylus.sone.database.Database;
  79 import net.pterodactylus.sone.database.DatabaseException;
  80 import net.pterodactylus.sone.database.ImageBuilder;
  81 import net.pterodactylus.sone.database.PostBuilder;
  82 import net.pterodactylus.sone.database.PostProvider;
  83 import net.pterodactylus.sone.database.PostReplyBuilder;
  84 import net.pterodactylus.sone.database.PostReplyProvider;
  85 import net.pterodactylus.sone.database.SoneBuilder;
  86 import net.pterodactylus.sone.database.SoneProvider;
  87 import net.pterodactylus.sone.freenet.wot.Identity;
  88 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  89 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  90 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  91 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  92 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  93 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  94 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  95 import net.pterodactylus.sone.main.SonePlugin;
  96 import net.pterodactylus.util.config.Configuration;
  97 import net.pterodactylus.util.config.ConfigurationException;
  98 import net.pterodactylus.util.service.AbstractService;
  99 import net.pterodactylus.util.thread.NamedThreadFactory;
 100
 101 import com.google.common.annotations.VisibleForTesting;
 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         private final AtomicBoolean debug = new AtomicBoolean(false);
 125
 126         /** The preferences. */
 127         private final Preferences preferences;
 128
 129         /** The event bus. */
 130         private final EventBus eventBus;
 131
 132         /** The configuration. */
 133         private final Configuration configuration;
 134
 135         /** Whether we’re currently saving the configuration. */
 136         private boolean storingConfiguration = false;
 137
 138         /** The identity manager. */
 139         private final IdentityManager identityManager;
 140
 141         /** Interface to freenet. */
 142         private final FreenetInterface freenetInterface;
 143
 144         /** The Sone downloader. */
 145         private final SoneDownloader soneDownloader;
 146
 147         /** The image inserter. */
 148         private final ImageInserter imageInserter;
 149
 150         /** Sone downloader thread-pool. */
 151         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 152
 153         /** The update checker. */
 154         private final UpdateChecker updateChecker;
 155
 156         /** The trust updater. */
 157         private final WebOfTrustUpdater webOfTrustUpdater;
 158
 159         /** Locked local Sones. */
 160         /* synchronize on itself. */
 161         private final Set<Sone> lockedSones = new HashSet<>();
 162
 163         /** Sone inserters. */
 164         /* synchronize access on this on sones. */
 165         private final Map<Sone, SoneInserter> soneInserters = new HashMap<>();
 166
 167         /** Sone rescuers. */
 168         /* synchronize access on this on sones. */
 169         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<>();
 170
 171         /** All known Sones. */
 172         private final Set<String> knownSones = new HashSet<>();
 173
 174         /** The post database. */
 175         private final Database database;
 176
 177         /** Trusted identities, sorted by own identities. */
 178         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 179
 180         /** All temporary images. */
 181         private final Map<String, TemporaryImage> temporaryImages = new HashMap<>();
 182
 183         /** Ticker for threads that mark own elements as known. */
 184         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 185
 186         /** The time the configuration was last touched. */
 187         private volatile long lastConfigurationUpdate;
 188
 189         /**
 190          * Creates a new core.
 191          *
 192          * @param configuration
 193          *            The configuration of the core
 194          * @param freenetInterface
 195          *            The freenet interface
 196          * @param identityManager
 197          *            The identity manager
 198          * @param webOfTrustUpdater
 199          *            The WebOfTrust updater
 200          * @param eventBus
 201          *            The event bus
 202          * @param database
 203          *            The database
 204          */
 205         @Inject
 206         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 207                 super("Sone Core");
 208                 this.configuration = configuration;
 209                 this.freenetInterface = freenetInterface;
 210                 this.identityManager = identityManager;
 211                 this.soneDownloader = soneDownloader;
 212                 this.imageInserter = imageInserter;
 213                 this.updateChecker = updateChecker;
 214                 this.webOfTrustUpdater = webOfTrustUpdater;
 215                 this.eventBus = eventBus;
 216                 this.database = database;
 217                 preferences = new Preferences(eventBus);
 218         }
 219
 220         //
 221         // ACCESSORS
 222         //
 223
 224         /**
 225          * Returns the time Sone was started.
 226          *
 227          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 228          */
 229         public long getStartupTime() {
 230                 return startupTime;
 231         }
 232
 233         @Nonnull
 234         public boolean getDebug() {
 235                 return debug.get();
 236         }
 237
 238         public void setDebug() {
 239                 debug.set(true);
 240         }
 241
 242         /**
 243          * Returns the options used by the core.
 244          *
 245          * @return The options of the core
 246          */
 247         public Preferences getPreferences() {
 248                 return preferences;
 249         }
 250
 251         /**
 252          * Returns the identity manager used by the core.
 253          *
 254          * @return The identity manager
 255          */
 256         public IdentityManager getIdentityManager() {
 257                 return identityManager;
 258         }
 259
 260         /**
 261          * Returns the update checker.
 262          *
 263          * @return The update checker
 264          */
 265         public UpdateChecker getUpdateChecker() {
 266                 return updateChecker;
 267         }
 268
 269         /**
 270          * Returns the Sone rescuer for the given local Sone.
 271          *
 272          * @param sone
 273          *            The local Sone to get the rescuer for
 274          * @return The Sone rescuer for the given Sone
 275          */
 276         public SoneRescuer getSoneRescuer(Sone sone) {
 277                 checkNotNull(sone, "sone must not be null");
 278                 checkArgument(sone.isLocal(), "sone must be local");
 279                 synchronized (soneRescuers) {
 280                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 281                         if (soneRescuer == null) {
 282                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 283                                 soneRescuers.put(sone, soneRescuer);
 284                                 soneRescuer.start();
 285                         }
 286                         return soneRescuer;
 287                 }
 288         }
 289
 290         /**
 291          * Returns whether the given Sone is currently locked.
 292          *
 293          * @param sone
 294          *            The sone to check
 295          * @return {@code true} if the Sone is locked, {@code false} if it is not
 296          */
 297         public boolean isLocked(Sone sone) {
 298                 synchronized (lockedSones) {
 299                         return lockedSones.contains(sone);
 300                 }
 301         }
 302
 303         public SoneBuilder soneBuilder() {
 304                 return database.newSoneBuilder();
 305         }
 306
 307         /**
 308          * {@inheritDocs}
 309          */
 310         @Nonnull
 311         @Override
 312         public Collection<Sone> getSones() {
 313                 return database.getSones();
 314         }
 315
 316         @Nonnull
 317         @Override
 318         public Function1<String, Sone> getSoneLoader() {
 319                 return database.getSoneLoader();
 320         }
 321
 322         /**
 323          * Returns the Sone with the given ID, regardless whether it’s local or
 324          * remote.
 325          *
 326          * @param id
 327          *            The ID of the Sone to get
 328          * @return The Sone with the given ID, or {@code null} if there is no such
 329          *         Sone
 330          */
 331         @Override
 332         @Nullable
 333         public Sone getSone(@Nonnull String id) {
 334                 return database.getSone(id);
 335         }
 336
 337         /**
 338          * {@inheritDocs}
 339          */
 340         @Override
 341         public Collection<Sone> getLocalSones() {
 342                 return database.getLocalSones();
 343         }
 344
 345         /**
 346          * Returns the local Sone with the given ID, optionally creating a new Sone.
 347          *
 348          * @param id
 349          *            The ID of the Sone
 350          * @return The Sone with the given ID, or {@code null}
 351          */
 352         public Sone getLocalSone(String id) {
 353                 Sone sone = database.getSone(id);
 354                 if ((sone != null) && sone.isLocal()) {
 355                         return sone;
 356                 }
 357                 return null;
 358         }
 359
 360         /**
 361          * {@inheritDocs}
 362          */
 363         @Override
 364         public Collection<Sone> getRemoteSones() {
 365                 return database.getRemoteSones();
 366         }
 367
 368         /**
 369          * Returns the remote Sone with the given ID.
 370          *
 371          *
 372          * @param id
 373          *            The ID of the remote Sone to get
 374          * @return The Sone with the given ID
 375          */
 376         public Sone getRemoteSone(String id) {
 377                 return database.getSone(id);
 378         }
 379
 380         /**
 381          * Returns whether the given Sone has been modified.
 382          *
 383          * @param sone
 384          *            The Sone to check for modifications
 385          * @return {@code true} if a modification has been detected in the Sone,
 386          *         {@code false} otherwise
 387          */
 388         public boolean isModifiedSone(Sone sone) {
 389                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 390         }
 391
 392         /**
 393          * Returns a post builder.
 394          *
 395          * @return A new post builder
 396          */
 397         public PostBuilder postBuilder() {
 398                 return database.newPostBuilder();
 399         }
 400
 401         @Nullable
 402         @Override
 403         public Post getPost(@Nonnull String postId) {
 404                 return database.getPost(postId);
 405         }
 406
 407         /**
 408          * {@inheritDocs}
 409          */
 410         @Override
 411         public Collection<Post> getPosts(String soneId) {
 412                 return database.getPosts(soneId);
 413         }
 414
 415         /**
 416          * {@inheritDoc}
 417          */
 418         @Override
 419         public Collection<Post> getDirectedPosts(final String recipientId) {
 420                 checkNotNull(recipientId, "recipient must not be null");
 421                 return database.getDirectedPosts(recipientId);
 422         }
 423
 424         /**
 425          * Returns a post reply builder.
 426          *
 427          * @return A new post reply builder
 428          */
 429         public PostReplyBuilder postReplyBuilder() {
 430                 return database.newPostReplyBuilder();
 431         }
 432
 433         /**
 434          * {@inheritDoc}
 435          */
 436         @Nullable
 437         @Override
 438         public PostReply getPostReply(String replyId) {
 439                 return database.getPostReply(replyId);
 440         }
 441
 442         /**
 443          * {@inheritDoc}
 444          */
 445         @Override
 446         public List<PostReply> getReplies(final String postId) {
 447                 return database.getReplies(postId);
 448         }
 449
 450         /**
 451          * Returns all Sones that have liked the given post.
 452          *
 453          * @param post
 454          *            The post to get the liking Sones for
 455          * @return The Sones that like the given post
 456          */
 457         public Set<Sone> getLikes(Post post) {
 458                 Set<Sone> sones = new HashSet<>();
 459                 for (Sone sone : getSones()) {
 460                         if (sone.getLikedPostIds().contains(post.getId())) {
 461                                 sones.add(sone);
 462                         }
 463                 }
 464                 return sones;
 465         }
 466
 467         /**
 468          * Returns all Sones that have liked the given reply.
 469          *
 470          * @param reply
 471          *            The reply to get the liking Sones for
 472          * @return The Sones that like the given reply
 473          */
 474         public Set<Sone> getLikes(PostReply reply) {
 475                 Set<Sone> sones = new HashSet<>();
 476                 for (Sone sone : getSones()) {
 477                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 478                                 sones.add(sone);
 479                         }
 480                 }
 481                 return sones;
 482         }
 483
 484         /**
 485          * Returns whether the given post is bookmarked.
 486          *
 487          * @param post
 488          *            The post to check
 489          * @return {@code true} if the given post is bookmarked, {@code false}
 490          *         otherwise
 491          */
 492         public boolean isBookmarked(Post post) {
 493                 return database.isPostBookmarked(post);
 494         }
 495
 496         /**
 497          * Returns all currently known bookmarked posts.
 498          *
 499          * @return All bookmarked posts
 500          */
 501         public Set<Post> getBookmarkedPosts() {
 502                 return database.getBookmarkedPosts();
 503         }
 504
 505         public AlbumBuilder albumBuilder() {
 506                 return database.newAlbumBuilder();
 507         }
 508
 509         /**
 510          * Returns the album with the given ID, optionally creating a new album if
 511          * an album with the given ID can not be found.
 512          *
 513          * @param albumId
 514          *            The ID of the album
 515          * @return The album with the given ID, or {@code null} if no album with the
 516          *         given ID exists
 517          */
 518         @Nullable
 519         public Album getAlbum(@Nonnull String albumId) {
 520                 return database.getAlbum(albumId);
 521         }
 522
 523         public ImageBuilder imageBuilder() {
 524                 return database.newImageBuilder();
 525         }
 526
 527         /**
 528          * Returns the image with the given ID, creating it if necessary.
 529          *
 530          * @param imageId
 531          *            The ID of the image
 532          * @return The image with the given ID
 533          */
 534         @Nullable
 535         public Image getImage(String imageId) {
 536                 return getImage(imageId, true);
 537         }
 538
 539         /**
 540          * Returns the image with the given ID, optionally creating it if it does
 541          * not exist.
 542          *
 543          * @param imageId
 544          *            The ID of the image
 545          * @param create
 546          *            {@code true} to create an image if none exists with the given
 547          *            ID
 548          * @return The image with the given ID, or {@code null} if none exists and
 549          *         none was created
 550          */
 551         @Nullable
 552         public Image getImage(String imageId, boolean create) {
 553                 Image image = database.getImage(imageId);
 554                 if (image != null) {
 555                         return image;
 556                 }
 557                 if (!create) {
 558                         return null;
 559                 }
 560                 Image newImage = database.newImageBuilder().withId(imageId).build();
 561                 database.storeImage(newImage);
 562                 return newImage;
 563         }
 564
 565         /**
 566          * Returns the temporary image with the given ID.
 567          *
 568          * @param imageId
 569          *            The ID of the temporary image
 570          * @return The temporary image, or {@code null} if there is no temporary
 571          *         image with the given ID
 572          */
 573         public TemporaryImage getTemporaryImage(String imageId) {
 574                 synchronized (temporaryImages) {
 575                         return temporaryImages.get(imageId);
 576                 }
 577         }
 578
 579         //
 580         // ACTIONS
 581         //
 582
 583         /**
 584          * Locks the given Sone. A locked Sone will not be inserted by
 585          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 586          * again.
 587          *
 588          * @param sone
 589          *            The sone to lock
 590          */
 591         public void lockSone(Sone sone) {
 592                 synchronized (lockedSones) {
 593                         if (lockedSones.add(sone)) {
 594                                 eventBus.post(new SoneLockedEvent(sone));
 595                         }
 596                 }
 597         }
 598
 599         /**
 600          * Unlocks the given Sone.
 601          *
 602          * @see #lockSone(Sone)
 603          * @param sone
 604          *            The sone to unlock
 605          */
 606         public void unlockSone(Sone sone) {
 607                 synchronized (lockedSones) {
 608                         if (lockedSones.remove(sone)) {
 609                                 eventBus.post(new SoneUnlockedEvent(sone));
 610                         }
 611                 }
 612         }
 613
 614         /**
 615          * Adds a local Sone from the given own identity.
 616          *
 617          * @param ownIdentity
 618          *            The own identity to create a Sone from
 619          * @return The added (or already existing) Sone
 620          */
 621         public Sone addLocalSone(OwnIdentity ownIdentity) {
 622                 if (ownIdentity == null) {
 623                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 624                         return null;
 625                 }
 626                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 627                 Sone sone = database.newSoneBuilder().local().from(ownIdentity).build();
 628                 String property = fromNullable(ownIdentity.getProperty("Sone.LatestEdition")).or("0");
 629                 sone.setLatestEdition(fromNullable(tryParse(property)).or(0L));
 630                 sone.setClient(new Client("Sone", SonePlugin.getPluginVersion()));
 631                 sone.setKnown(true);
 632                 SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, ownIdentity.getId());
 633                 soneInserter.insertionDelayChanged(new InsertionDelayChangedEvent(preferences.getInsertionDelay()));
 634                 eventBus.register(soneInserter);
 635                 synchronized (soneInserters) {
 636                         soneInserters.put(sone, soneInserter);
 637                 }
 638                 loadSone(sone);
 639                 database.storeSone(sone);
 640                 sone.setStatus(SoneStatus.idle);
 641                 soneInserter.start();
 642                 return sone;
 643         }
 644
 645         /**
 646          * Creates a new Sone for the given own identity.
 647          *
 648          * @param ownIdentity
 649          *            The own identity to create a Sone for
 650          * @return The created Sone
 651          */
 652         public Sone createSone(OwnIdentity ownIdentity) {
 653                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 654                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 655                         return null;
 656                 }
 657                 Sone sone = addLocalSone(ownIdentity);
 658
 659                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 660                 touchConfiguration();
 661                 return sone;
 662         }
 663
 664         /**
 665          * Adds the Sone of the given identity.
 666          *
 667          * @param identity
 668          *            The identity whose Sone to add
 669          * @return The added or already existing Sone
 670          */
 671         public Sone addRemoteSone(Identity identity) {
 672                 if (identity == null) {
 673                         logger.log(Level.WARNING, "Given Identity is null!");
 674                         return null;
 675                 }
 676                 String property = fromNullable(identity.getProperty("Sone.LatestEdition")).or("0");
 677                 long latestEdition = fromNullable(tryParse(property)).or(0L);
 678                 Sone existingSone = getSone(identity.getId());
 679                 if ((existingSone != null )&& existingSone.isLocal()) {
 680                         return existingSone;
 681                 }
 682                 boolean newSone = existingSone == null;
 683                 Sone sone = !newSone ? existingSone : database.newSoneBuilder().from(identity).build();
 684                 sone.setLatestEdition(latestEdition);
 685                 if (newSone) {
 686                         synchronized (knownSones) {
 687                                 newSone = !knownSones.contains(sone.getId());
 688                         }
 689                         sone.setKnown(!newSone);
 690                         if (newSone) {
 691                                 eventBus.post(new NewSoneFoundEvent(sone));
 692                                 for (Sone localSone : getLocalSones()) {
 693                                         if (localSone.getOptions().isAutoFollow()) {
 694                                                 followSone(localSone, sone.getId());
 695                                         }
 696                                 }
 697                         }
 698                 }
 699                 database.storeSone(sone);
 700                 soneDownloader.addSone(sone);
 701                 soneDownloaders.execute(soneDownloader.fetchSoneAsUskAction(sone));
 702                 return sone;
 703         }
 704
 705         /**
 706          * Lets the given local Sone follow the Sone with the given ID.
 707          *
 708          * @param sone
 709          *            The local Sone that should follow another Sone
 710          * @param soneId
 711          *            The ID of the Sone to follow
 712          */
 713         public void followSone(Sone sone, String soneId) {
 714                 checkNotNull(sone, "sone must not be null");
 715                 checkNotNull(soneId, "soneId must not be null");
 716                 database.addFriend(sone, soneId);
 717                 @SuppressWarnings("ConstantConditions") // we just followed, this can’t be null.
 718                 long now = database.getFollowingTime(soneId);
 719                 Sone followedSone = getSone(soneId);
 720                 if (followedSone == null) {
 721                         return;
 722                 }
 723                 for (Post post : followedSone.getPosts()) {
 724                         if (post.getTime() < now) {
 725                                 markPostKnown(post);
 726                         }
 727                 }
 728                 for (PostReply reply : followedSone.getReplies()) {
 729                         if (reply.getTime() < now) {
 730                                 markReplyKnown(reply);
 731                         }
 732                 }
 733                 touchConfiguration();
 734         }
 735
 736         /**
 737          * Lets the given local Sone unfollow the Sone with the given ID.
 738          *
 739          * @param sone
 740          *            The local Sone that should unfollow another Sone
 741          * @param soneId
 742          *            The ID of the Sone being unfollowed
 743          */
 744         public void unfollowSone(Sone sone, String soneId) {
 745                 checkNotNull(sone, "sone must not be null");
 746                 checkNotNull(soneId, "soneId must not be null");
 747                 database.removeFriend(sone, soneId);
 748                 touchConfiguration();
 749         }
 750
 751         /**
 752          * Sets the trust value of the given origin Sone for the target Sone.
 753          *
 754          * @param origin
 755          *            The origin Sone
 756          * @param target
 757          *            The target Sone
 758          * @param trustValue
 759          *            The trust value (from {@code -100} to {@code 100})
 760          */
 761         public void setTrust(Sone origin, Sone target, int trustValue) {
 762                 checkNotNull(origin, "origin must not be null");
 763                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 764                 checkNotNull(target, "target must not be null");
 765                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 766                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 767         }
 768
 769         /**
 770          * Removes any trust assignment for the given target Sone.
 771          *
 772          * @param origin
 773          *            The trust origin
 774          * @param target
 775          *            The trust target
 776          */
 777         public void removeTrust(Sone origin, Sone target) {
 778                 checkNotNull(origin, "origin must not be null");
 779                 checkNotNull(target, "target must not be null");
 780                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 781                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 782         }
 783
 784         /**
 785          * Assigns the configured positive trust value for the given target.
 786          *
 787          * @param origin
 788          *            The trust origin
 789          * @param target
 790          *            The trust target
 791          */
 792         public void trustSone(Sone origin, Sone target) {
 793                 setTrust(origin, target, preferences.getPositiveTrust());
 794         }
 795
 796         /**
 797          * Assigns the configured negative trust value for the given target.
 798          *
 799          * @param origin
 800          *            The trust origin
 801          * @param target
 802          *            The trust target
 803          */
 804         public void distrustSone(Sone origin, Sone target) {
 805                 setTrust(origin, target, preferences.getNegativeTrust());
 806         }
 807
 808         /**
 809          * Removes the trust assignment for the given target.
 810          *
 811          * @param origin
 812          *            The trust origin
 813          * @param target
 814          *            The trust target
 815          */
 816         public void untrustSone(Sone origin, Sone target) {
 817                 removeTrust(origin, target);
 818         }
 819
 820         /**
 821          * Updates the stored Sone with the given Sone.
 822          *
 823          * @param sone
 824          *            The updated Sone
 825          */
 826         public void updateSone(Sone sone) {
 827                 updateSone(sone, false);
 828         }
 829
 830         /**
 831          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 832          * {@code true}, an older Sone than the current Sone can be given to restore
 833          * an old state.
 834          *
 835          * @param sone
 836          *            The Sone to update
 837          * @param soneRescueMode
 838          *            {@code true} if the stored Sone should be updated regardless
 839          *            of the age of the given Sone
 840          */
 841         public void updateSone(final Sone sone, boolean soneRescueMode) {
 842                 Sone storedSone = getSone(sone.getId());
 843                 if (storedSone != null) {
 844                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
 845                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 846                                 return;
 847                         }
 848                         List<Object> events =
 849                                         collectEventsForChangesInSone(storedSone, sone);
 850                         database.storeSone(sone);
 851                         for (Object event : events) {
 852                                 eventBus.post(event);
 853                         }
 854                         sone.setOptions(storedSone.getOptions());
 855                         sone.setKnown(storedSone.isKnown());
 856                         sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 857                         if (sone.isLocal()) {
 858                                 touchConfiguration();
 859                         }
 860                 }
 861         }
 862
 863         private List<Object> collectEventsForChangesInSone(Sone oldSone, Sone newSone) {
 864                 List<Object> events = new ArrayList<>();
 865                 SoneComparison soneComparison = new SoneComparison(oldSone, newSone);
 866                 for (Post newPost : soneComparison.getNewPosts()) {
 867                         if (newPost.getSone().equals(newSone)) {
 868                                 newPost.setKnown(true);
 869                         } else if (newPost.getTime() < database.getFollowingTime(newSone.getId())) {
 870                                 newPost.setKnown(true);
 871                         } else if (!newPost.isKnown()) {
 872                                 events.add(new NewPostFoundEvent(newPost));
 873                         }
 874                 }
 875                 for (Post post : soneComparison.getRemovedPosts()) {
 876                         events.add(new PostRemovedEvent(post));
 877                 }
 878                 for (PostReply postReply : soneComparison.getNewPostReplies()) {
 879                         if (postReply.getSone().equals(newSone)) {
 880                                 postReply.setKnown(true);
 881                         } else if (postReply.getTime() < database.getFollowingTime(newSone.getId())) {
 882                                 postReply.setKnown(true);
 883                         } else if (!postReply.isKnown()) {
 884                                 events.add(new NewPostReplyFoundEvent(postReply));
 885                         }
 886                 }
 887                 for (PostReply postReply : soneComparison.getRemovedPostReplies()) {
 888                         events.add(new PostReplyRemovedEvent(postReply));
 889                 }
 890                 return events;
 891         }
 892
 893         /**
 894          * Deletes the given Sone. This will remove the Sone from the
 895          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
 896          * remove the context from its identity.
 897          *
 898          * @param sone
 899          *            The Sone to delete
 900          */
 901         public void deleteSone(Sone sone) {
 902                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 903                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
 904                         return;
 905                 }
 906                 if (!getLocalSones().contains(sone)) {
 907                         logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
 908                         return;
 909                 }
 910                 SoneInserter soneInserter = soneInserters.remove(sone);
 911                 soneInserter.stop();
 912                 database.removeSone(sone);
 913                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 914                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 915                 try {
 916                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 917                 } catch (ConfigurationException ce1) {
 918                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 919                 }
 920         }
 921
 922         /**
 923          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
 924          * known} before, a {@link MarkSoneKnownEvent} is fired.
 925          *
 926          * @param sone
 927          *            The Sone to mark as known
 928          */
 929         public void markSoneKnown(Sone sone) {
 930                 if (!sone.isKnown()) {
 931                         sone.setKnown(true);
 932                         synchronized (knownSones) {
 933                                 knownSones.add(sone.getId());
 934                         }
 935                         eventBus.post(new MarkSoneKnownEvent(sone));
 936                         touchConfiguration();
 937                 }
 938         }
 939
 940         /**
 941          * Loads and updates the given Sone from the configuration. If any error is
 942          * encountered, loading is aborted and the given Sone is not changed.
 943          *
 944          * @param sone
 945          *            The Sone to load and update
 946          */
 947         public void loadSone(Sone sone) {
 948                 if (!sone.isLocal()) {
 949                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
 950                         return;
 951                 }
 952                 logger.info(String.format("Loading local Sone: %s", sone));
 953
 954                 /* load Sone. */
 955                 String sonePrefix = "Sone/" + sone.getId();
 956                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 957                 if (soneTime == null) {
 958                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 959                         return;
 960                 }
 961                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 962
 963                 /* load profile. */
 964                 ConfigurationSoneParser configurationSoneParser = new ConfigurationSoneParser(configuration, sone);
 965                 Profile profile = configurationSoneParser.parseProfile();
 966
 967                 /* load posts. */
 968                 Collection<Post> posts;
 969                 try {
 970                         posts = configurationSoneParser.parsePosts(database);
 971                 } catch (InvalidPostFound ipf) {
 972                         logger.log(Level.WARNING, "Invalid post found, aborting load!");
 973                         return;
 974                 }
 975
 976                 /* load replies. */
 977                 Collection<PostReply> replies;
 978                 try {
 979                         replies = configurationSoneParser.parsePostReplies(database);
 980                 } catch (InvalidPostReplyFound iprf) {
 981                         logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 982                         return;
 983                 }
 984
 985                 /* load post likes. */
 986                 Set<String> likedPostIds =
 987                                 configurationSoneParser.parseLikedPostIds();
 988
 989                 /* load reply likes. */
 990                 Set<String> likedReplyIds =
 991                                 configurationSoneParser.parseLikedPostReplyIds();
 992
 993                 /* load albums. */
 994                 List<Album> topLevelAlbums;
 995                 try {
 996                         topLevelAlbums =
 997                                         configurationSoneParser.parseTopLevelAlbums(database);
 998                 } catch (InvalidAlbumFound iaf) {
 999                         logger.log(Level.WARNING, "Invalid album found, aborting load!");
1000                         return;
1001                 } catch (InvalidParentAlbumFound ipaf) {
1002                         logger.log(Level.WARNING, format("Invalid parent album ID: %s",
1003                                         ipaf.getAlbumParentId()));
1004                         return;
1005                 }
1006
1007                 /* load images. */
1008                 try {
1009                         configurationSoneParser.parseImages(database);
1010                 } catch (InvalidImageFound iif) {
1011                         logger.log(WARNING, "Invalid image found, aborting load!");
1012                         return;
1013                 } catch (InvalidParentAlbumFound ipaf) {
1014                         logger.log(Level.WARNING,
1015                                         format("Invalid album image (%s) encountered, aborting load!",
1016                                                         ipaf.getAlbumParentId()));
1017                         return;
1018                 }
1019
1020                 /* load avatar. */
1021                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1022                 if (avatarId != null) {
1023                         final Map<String, Image> images =
1024                                         configurationSoneParser.getImages();
1025                         profile.setAvatar(images.get(avatarId));
1026                 }
1027
1028                 /* load options. */
1029                 sone.getOptions().setAutoFollow(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(false));
1030                 sone.getOptions().setSoneInsertNotificationEnabled(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(false));
1031                 sone.getOptions().setShowNewSoneNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(true));
1032                 sone.getOptions().setShowNewPostNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(true));
1033                 sone.getOptions().setShowNewReplyNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(true));
1034                 sone.getOptions().setShowCustomAvatars(LoadExternalContent.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(LoadExternalContent.NEVER.name())));
1035                 sone.getOptions().setLoadLinkedImages(LoadExternalContent.valueOf(configuration.getStringValue(sonePrefix + "/Options/LoadLinkedImages").getValue(LoadExternalContent.NEVER.name())));
1036
1037                 /* if we’re still here, Sone was loaded successfully. */
1038                 synchronized (sone) {
1039                         sone.setTime(soneTime);
1040                         sone.setProfile(profile);
1041                         sone.setPosts(posts);
1042                         sone.setReplies(replies);
1043                         sone.setLikePostIds(likedPostIds);
1044                         sone.setLikeReplyIds(likedReplyIds);
1045                         for (Album album : sone.getRootAlbum().getAlbums()) {
1046                                 sone.getRootAlbum().removeAlbum(album);
1047                         }
1048                         for (Album album : topLevelAlbums) {
1049                                 sone.getRootAlbum().addAlbum(album);
1050                         }
1051                         synchronized (soneInserters) {
1052                                 soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1053                         }
1054                 }
1055                 for (Post post : posts) {
1056                         post.setKnown(true);
1057                 }
1058                 for (PostReply reply : replies) {
1059                         reply.setKnown(true);
1060                 }
1061
1062                 logger.info(String.format("Sone loaded successfully: %s", sone));
1063         }
1064
1065         /**
1066          * Creates a new post.
1067          *
1068          * @param sone
1069          *            The Sone that creates the post
1070          * @param recipient
1071          *            The recipient Sone, or {@code null} if this post does not have
1072          *            a recipient
1073          * @param text
1074          *            The text of the post
1075          * @return The created post
1076          */
1077         public Post createPost(Sone sone, @Nullable Sone recipient, String text) {
1078                 checkNotNull(text, "text must not be null");
1079                 checkArgument(text.trim().length() > 0, "text must not be empty");
1080                 if (!sone.isLocal()) {
1081                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1082                         return null;
1083                 }
1084                 PostBuilder postBuilder = database.newPostBuilder();
1085                 postBuilder.from(sone.getId()).randomId().currentTime().withText(text.trim());
1086                 if (recipient != null) {
1087                         postBuilder.to(recipient.getId());
1088                 }
1089                 final Post post = postBuilder.build();
1090                 database.storePost(post);
1091                 eventBus.post(new NewPostFoundEvent(post));
1092                 sone.addPost(post);
1093                 touchConfiguration();
1094                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
1095                 return post;
1096         }
1097
1098         /**
1099          * Deletes the given post.
1100          *
1101          * @param post
1102          *            The post to delete
1103          */
1104         public void deletePost(Post post) {
1105                 if (!post.getSone().isLocal()) {
1106                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1107                         return;
1108                 }
1109                 database.removePost(post);
1110                 eventBus.post(new PostRemovedEvent(post));
1111                 markPostKnown(post);
1112                 touchConfiguration();
1113         }
1114
1115         /**
1116          * Marks the given post as known, if it is currently not a known post
1117          * (according to {@link Post#isKnown()}).
1118          *
1119          * @param post
1120          *            The post to mark as known
1121          */
1122         public void markPostKnown(Post post) {
1123                 post.setKnown(true);
1124                 eventBus.post(new MarkPostKnownEvent(post));
1125                 touchConfiguration();
1126                 for (PostReply reply : getReplies(post.getId())) {
1127                         markReplyKnown(reply);
1128                 }
1129         }
1130
1131         public void bookmarkPost(Post post) {
1132                 database.bookmarkPost(post);
1133         }
1134
1135         /**
1136          * Removes the given post from the bookmarks.
1137          *
1138          * @param post
1139          *            The post to unbookmark
1140          */
1141         public void unbookmarkPost(Post post) {
1142                 database.unbookmarkPost(post);
1143         }
1144
1145         /**
1146          * Creates a new reply.
1147          *
1148          * @param sone
1149          *            The Sone that creates the reply
1150          * @param post
1151          *            The post that this reply refers to
1152          * @param text
1153          *            The text of the reply
1154          * @return The created reply
1155          */
1156         public PostReply createReply(Sone sone, Post post, String text) {
1157                 checkNotNull(text, "text must not be null");
1158                 checkArgument(text.trim().length() > 0, "text must not be empty");
1159                 if (!sone.isLocal()) {
1160                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1161                         return null;
1162                 }
1163                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1164                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1165                 final PostReply reply = postReplyBuilder.build();
1166                 database.storePostReply(reply);
1167                 eventBus.post(new NewPostReplyFoundEvent(reply));
1168                 sone.addReply(reply);
1169                 touchConfiguration();
1170                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1171                 return reply;
1172         }
1173
1174         /**
1175          * Deletes the given reply.
1176          *
1177          * @param reply
1178          *            The reply to delete
1179          */
1180         public void deleteReply(PostReply reply) {
1181                 Sone sone = reply.getSone();
1182                 if (!sone.isLocal()) {
1183                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1184                         return;
1185                 }
1186                 database.removePostReply(reply);
1187                 markReplyKnown(reply);
1188                 sone.removeReply(reply);
1189                 touchConfiguration();
1190         }
1191
1192         /**
1193          * Marks the given reply as known, if it is currently not a known reply
1194          * (according to {@link Reply#isKnown()}).
1195          *
1196          * @param reply
1197          *            The reply to mark as known
1198          */
1199         public void markReplyKnown(PostReply reply) {
1200                 boolean previouslyKnown = reply.isKnown();
1201                 reply.setKnown(true);
1202                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1203                 if (!previouslyKnown) {
1204                         touchConfiguration();
1205                 }
1206         }
1207
1208         /**
1209          * Creates a new album for the given Sone.
1210          *
1211          * @param sone
1212          *            The Sone to create the album for
1213          * @param parent
1214          *            The parent of the album (may be {@code null} to create a
1215          *            top-level album)
1216          * @return The new album
1217          */
1218         public Album createAlbum(Sone sone, Album parent) {
1219                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1220                 database.storeAlbum(album);
1221                 parent.addAlbum(album);
1222                 return album;
1223         }
1224
1225         /**
1226          * Deletes the given album. The owner of the album has to be a local Sone,
1227          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1228          *
1229          * @param album
1230          *            The album to remove
1231          */
1232         public void deleteAlbum(Album album) {
1233                 checkNotNull(album, "album must not be null");
1234                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1235                 if (!album.isEmpty()) {
1236                         return;
1237                 }
1238                 album.getParent().removeAlbum(album);
1239                 database.removeAlbum(album);
1240                 touchConfiguration();
1241         }
1242
1243         /**
1244          * Creates a new image.
1245          *
1246          * @param sone
1247          *            The Sone creating the image
1248          * @param album
1249          *            The album the image will be inserted into
1250          * @param temporaryImage
1251          *            The temporary image to create the image from
1252          * @return The newly created image
1253          */
1254         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1255                 checkNotNull(sone, "sone must not be null");
1256                 checkNotNull(album, "album must not be null");
1257                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1258                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1259                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1260                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1261                 album.addImage(image);
1262                 database.storeImage(image);
1263                 imageInserter.insertImage(temporaryImage, image);
1264                 return image;
1265         }
1266
1267         /**
1268          * Deletes the given image. This method will also delete a matching
1269          * temporary image.
1270          *
1271          * @see #deleteTemporaryImage(String)
1272          * @param image
1273          *            The image to delete
1274          */
1275         public void deleteImage(Image image) {
1276                 checkNotNull(image, "image must not be null");
1277                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1278                 deleteTemporaryImage(image.getId());
1279                 image.getAlbum().removeImage(image);
1280                 database.removeImage(image);
1281                 touchConfiguration();
1282         }
1283
1284         /**
1285          * Creates a new temporary image.
1286          *
1287          * @param mimeType
1288          *            The MIME type of the temporary image
1289          * @param imageData
1290          *            The encoded data of the image
1291          * @return The temporary image
1292          */
1293         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1294                 TemporaryImage temporaryImage = new TemporaryImage();
1295                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1296                 synchronized (temporaryImages) {
1297                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1298                 }
1299                 return temporaryImage;
1300         }
1301
1302         /**
1303          * Deletes the temporary image with the given ID.
1304          *
1305          * @param imageId
1306          *            The ID of the temporary image to delete
1307          */
1308         public void deleteTemporaryImage(String imageId) {
1309                 checkNotNull(imageId, "imageId must not be null");
1310                 synchronized (temporaryImages) {
1311                         temporaryImages.remove(imageId);
1312                 }
1313                 Image image = getImage(imageId, false);
1314                 if (image != null) {
1315                         imageInserter.cancelImageInsert(image);
1316                 }
1317         }
1318
1319         /**
1320          * Notifies the core that the configuration, either of the core or of a
1321          * single local Sone, has changed, and that the configuration should be
1322          * saved.
1323          */
1324         public void touchConfiguration() {
1325                 lastConfigurationUpdate = System.currentTimeMillis();
1326         }
1327
1328         //
1329         // SERVICE METHODS
1330         //
1331
1332         /**
1333          * Starts the core.
1334          */
1335         @Override
1336         public void serviceStart() {
1337                 loadConfiguration();
1338                 updateChecker.start();
1339                 identityManager.start();
1340                 webOfTrustUpdater.init();
1341                 webOfTrustUpdater.start();
1342                 database.startAsync();
1343         }
1344
1345         /**
1346          * {@inheritDoc}
1347          */
1348         @Override
1349         public void serviceRun() {
1350                 long lastSaved = System.currentTimeMillis();
1351                 while (!shouldStop()) {
1352                         sleep(1000);
1353                         long now = System.currentTimeMillis();
1354                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1355                                 for (Sone localSone : getLocalSones()) {
1356                                         saveSone(localSone);
1357                                 }
1358                                 saveConfiguration();
1359                                 lastSaved = now;
1360                         }
1361                 }
1362         }
1363
1364         /**
1365          * Stops the core.
1366          */
1367         @Override
1368         public void serviceStop() {
1369                 localElementTicker.shutdownNow();
1370                 synchronized (soneInserters) {
1371                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1372                                 soneInserter.getValue().stop();
1373                                 saveSone(soneInserter.getKey());
1374                         }
1375                 }
1376                 synchronized (soneRescuers) {
1377                         for (SoneRescuer soneRescuer : soneRescuers.values()) {
1378                                 soneRescuer.stop();
1379                         }
1380                 }
1381                 saveConfiguration();
1382                 database.stopAsync();
1383                 webOfTrustUpdater.stop();
1384                 updateChecker.stop();
1385                 soneDownloader.stop();
1386                 soneDownloaders.shutdown();
1387                 identityManager.stop();
1388         }
1389
1390         //
1391         // PRIVATE METHODS
1392         //
1393
1394         /**
1395          * Saves the given Sone. This will persist all local settings for the given
1396          * Sone, such as the friends list and similar, private options.
1397          *
1398          * @param sone
1399          *            The Sone to save
1400          */
1401         private synchronized void saveSone(Sone sone) {
1402                 if (!sone.isLocal()) {
1403                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1404                         return;
1405                 }
1406                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1407                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1408                         return;
1409                 }
1410
1411                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1412                 try {
1413                         /* save Sone into configuration. */
1414                         String sonePrefix = "Sone/" + sone.getId();
1415                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1416                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1417
1418                         /* save profile. */
1419                         Profile profile = sone.getProfile();
1420                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1421                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1422                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1423                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1424                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1425                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1426                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1427
1428                         /* save profile fields. */
1429                         int fieldCounter = 0;
1430                         for (Field profileField : profile.getFields()) {
1431                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1432                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1433                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1434                         }
1435                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1436
1437                         /* save posts. */
1438                         int postCounter = 0;
1439                         for (Post post : sone.getPosts()) {
1440                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1441                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1442                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1443                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1444                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1445                         }
1446                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1447
1448                         /* save replies. */
1449                         int replyCounter = 0;
1450                         for (PostReply reply : sone.getReplies()) {
1451                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1452                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1453                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1454                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1455                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1456                         }
1457                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1458
1459                         /* save post likes. */
1460                         int postLikeCounter = 0;
1461                         for (String postId : sone.getLikedPostIds()) {
1462                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1463                         }
1464                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1465
1466                         /* save reply likes. */
1467                         int replyLikeCounter = 0;
1468                         for (String replyId : sone.getLikedReplyIds()) {
1469                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1470                         }
1471                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1472
1473                         /* save albums. first, collect in a flat structure, top-level first. */
1474                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1475
1476                         int albumCounter = 0;
1477                         for (Album album : albums) {
1478                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1479                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1480                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1481                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1482                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1483                         }
1484                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1485
1486                         /* save images. */
1487                         int imageCounter = 0;
1488                         for (Album album : albums) {
1489                                 for (Image image : album.getImages()) {
1490                                         if (!image.isInserted()) {
1491                                                 continue;
1492                                         }
1493                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1494                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1495                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1496                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1497                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1498                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1499                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1500                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1501                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1502                                 }
1503                         }
1504                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1505
1506                         /* save options. */
1507                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().isAutoFollow());
1508                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().isSoneInsertNotificationEnabled());
1509                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().isShowNewSoneNotifications());
1510                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().isShowNewPostNotifications());
1511                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().isShowNewReplyNotifications());
1512                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().getShowCustomAvatars().name());
1513                         configuration.getStringValue(sonePrefix + "/Options/LoadLinkedImages").setValue(sone.getOptions().getLoadLinkedImages().name());
1514
1515                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1516
1517                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1518                 } catch (ConfigurationException ce1) {
1519                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1520                 }
1521         }
1522
1523         /**
1524          * Saves the current options.
1525          */
1526         private void saveConfiguration() {
1527                 synchronized (configuration) {
1528                         if (storingConfiguration) {
1529                                 logger.log(Level.FINE, "Already storing configuration…");
1530                                 return;
1531                         }
1532                         storingConfiguration = true;
1533                 }
1534
1535                 /* store the options first. */
1536                 try {
1537                         preferences.saveTo(configuration);
1538
1539                         /* save known Sones. */
1540                         int soneCounter = 0;
1541                         synchronized (knownSones) {
1542                                 for (String knownSoneId : knownSones) {
1543                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1544                                 }
1545                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1546                         }
1547
1548                         /* save known posts. */
1549                         database.save();
1550
1551                         /* now save it. */
1552                         configuration.save();
1553
1554                 } catch (ConfigurationException ce1) {
1555                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1556                 } catch (DatabaseException de1) {
1557                         logger.log(Level.SEVERE, "Could not save database!", de1);
1558                 } finally {
1559                         synchronized (configuration) {
1560                                 storingConfiguration = false;
1561                         }
1562                 }
1563         }
1564
1565         /**
1566          * Loads the configuration.
1567          */
1568         private void loadConfiguration() {
1569                 new PreferencesLoader(preferences).loadFrom(configuration);
1570
1571                 /* load known Sones. */
1572                 int soneCounter = 0;
1573                 while (true) {
1574                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1575                         if (knownSoneId == null) {
1576                                 break;
1577                         }
1578                         synchronized (knownSones) {
1579                                 knownSones.add(knownSoneId);
1580                         }
1581                 }
1582         }
1583
1584         /**
1585          * Notifies the core that a new {@link OwnIdentity} was added.
1586          *
1587          * @param ownIdentityAddedEvent
1588          *            The event
1589          */
1590         @Subscribe
1591         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1592                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1593                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1594                 if (ownIdentity.hasContext("Sone")) {
1595                         addLocalSone(ownIdentity);
1596                 }
1597         }
1598
1599         /**
1600          * Notifies the core that an {@link OwnIdentity} was removed.
1601          *
1602          * @param ownIdentityRemovedEvent
1603          *            The event
1604          */
1605         @Subscribe
1606         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1607                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1608                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1609                 trustedIdentities.removeAll(ownIdentity);
1610         }
1611
1612         /**
1613          * Notifies the core that a new {@link Identity} was added.
1614          *
1615          * @param identityAddedEvent
1616          *            The event
1617          */
1618         @Subscribe
1619         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1620                 Identity identity = identityAddedEvent.identity();
1621                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1622                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1623                 addRemoteSone(identity);
1624         }
1625
1626         /**
1627          * Notifies the core that an {@link Identity} was updated.
1628          *
1629          * @param identityUpdatedEvent
1630          *            The event
1631          */
1632         @Subscribe
1633         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1634                 Identity identity = identityUpdatedEvent.identity();
1635                 final Sone sone = getRemoteSone(identity.getId());
1636                 if (sone.isLocal()) {
1637                         return;
1638                 }
1639                 String newLatestEdition = identity.getProperty("Sone.LatestEdition");
1640                 if (newLatestEdition != null) {
1641                         Long parsedNewLatestEdition = tryParse(newLatestEdition);
1642                         if (parsedNewLatestEdition != null) {
1643                                 sone.setLatestEdition(parsedNewLatestEdition);
1644                         }
1645                 }
1646                 soneDownloader.addSone(sone);
1647                 soneDownloaders.execute(soneDownloader.fetchSoneAsSskAction(sone));
1648         }
1649
1650         /**
1651          * Notifies the core that an {@link Identity} was removed.
1652          *
1653          * @param identityRemovedEvent
1654          *            The event
1655          */
1656         @Subscribe
1657         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1658                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1659                 Identity identity = identityRemovedEvent.identity();
1660                 trustedIdentities.remove(ownIdentity, identity);
1661                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1662                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1663                                 continue;
1664                         }
1665                         if (trustedIdentity.getValue().contains(identity)) {
1666                                 return;
1667                         }
1668                 }
1669                 Sone sone = getSone(identity.getId());
1670                 if (sone == null) {
1671                         /* TODO - we don’t have the Sone anymore. should this happen? */
1672                         return;
1673                 }
1674                 for (PostReply postReply : sone.getReplies()) {
1675                         eventBus.post(new PostReplyRemovedEvent(postReply));
1676                 }
1677                 for (Post post : sone.getPosts()) {
1678                         eventBus.post(new PostRemovedEvent(post));
1679                 }
1680                 eventBus.post(new SoneRemovedEvent(sone));
1681                 database.removeSone(sone);
1682         }
1683
1684         /**
1685          * Deletes the temporary image.
1686          *
1687          * @param imageInsertFinishedEvent
1688          *            The event
1689          */
1690         @Subscribe
1691         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1692                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.getImage(), imageInsertFinishedEvent.getResultingUri()));
1693                 imageInsertFinishedEvent.getImage().modify().setKey(imageInsertFinishedEvent.getResultingUri().toString()).update();
1694                 deleteTemporaryImage(imageInsertFinishedEvent.getImage().getId());
1695                 touchConfiguration();
1696         }
1697
1698         @VisibleForTesting
1699         class MarkPostKnown implements Runnable {
1700
1701                 private final Post post;
1702
1703                 public MarkPostKnown(Post post) {
1704                         this.post = post;
1705                 }
1706
1707                 @Override
1708                 public void run() {
1709                         markPostKnown(post);
1710                 }
1711
1712         }
1713
1714         @VisibleForTesting
1715         class MarkReplyKnown implements Runnable {
1716
1717                 private final PostReply postReply;
1718
1719                 public MarkReplyKnown(PostReply postReply) {
1720                         this.postReply = postReply;
1721                 }
1722
1723                 @Override
1724                 public void run() {
1725                         markReplyKnown(postReply);
1726                 }
1727
1728         }
1729
1730 }