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

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.core;
  19
  20 import static com.google.common.base.Optional.fromNullable;
  21 import static com.google.common.base.Preconditions.checkArgument;
  22 import static com.google.common.base.Preconditions.checkNotNull;
  23 import static com.google.common.base.Predicates.not;
  24 import static com.google.common.primitives.Longs.tryParse;
  25 import static java.lang.String.format;
  26 import static java.util.logging.Level.WARNING;
  27 import static net.pterodactylus.sone.data.Sone.LOCAL_SONE_FILTER;
  28 import static net.pterodactylus.sone.data.Sone.toAllAlbums;
  29
  30 import java.net.MalformedURLException;
  31 import java.util.ArrayList;
  32 import java.util.Collection;
  33 import java.util.HashMap;
  34 import java.util.HashSet;
  35 import java.util.List;
  36 import java.util.Map;
  37 import java.util.Map.Entry;
  38 import java.util.Set;
  39 import java.util.concurrent.ExecutorService;
  40 import java.util.concurrent.Executors;
  41 import java.util.concurrent.ScheduledExecutorService;
  42 import java.util.concurrent.TimeUnit;
  43 import java.util.logging.Level;
  44 import java.util.logging.Logger;
  45
  46 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidAlbumFound;
  47 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidImageFound;
  48 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidParentAlbumFound;
  49 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostFound;
  50 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidPostReplyFound;
  51 import net.pterodactylus.sone.core.Options.DefaultOption;
  52 import net.pterodactylus.sone.core.SoneChangeDetector.PostProcessor;
  53 import net.pterodactylus.sone.core.SoneChangeDetector.PostReplyProcessor;
  54 import net.pterodactylus.sone.core.SoneInserter.SetInsertionDelay;
  55 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  56 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  57 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  58 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  59 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  60 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  61 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  62 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  63 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  64 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  65 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  66 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  67 import net.pterodactylus.sone.data.Album;
  68 import net.pterodactylus.sone.data.Client;
  69 import net.pterodactylus.sone.data.Image;
  70 import net.pterodactylus.sone.data.Post;
  71 import net.pterodactylus.sone.data.PostReply;
  72 import net.pterodactylus.sone.data.Profile;
  73 import net.pterodactylus.sone.data.Profile.Field;
  74 import net.pterodactylus.sone.data.Reply;
  75 import net.pterodactylus.sone.data.Sone;
  76 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
  77 import net.pterodactylus.sone.data.Sone.SoneStatus;
  78 import net.pterodactylus.sone.data.SoneImpl;
  79 import net.pterodactylus.sone.data.TemporaryImage;
  80 import net.pterodactylus.sone.database.AlbumBuilder;
  81 import net.pterodactylus.sone.database.Database;
  82 import net.pterodactylus.sone.database.DatabaseException;
  83 import net.pterodactylus.sone.database.ImageBuilder;
  84 import net.pterodactylus.sone.database.PostBuilder;
  85 import net.pterodactylus.sone.database.PostProvider;
  86 import net.pterodactylus.sone.database.PostReplyBuilder;
  87 import net.pterodactylus.sone.database.PostReplyProvider;
  88 import net.pterodactylus.sone.database.SoneProvider;
  89 import net.pterodactylus.sone.fcp.FcpInterface;
  90 import net.pterodactylus.sone.freenet.wot.Identity;
  91 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  92 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  93 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  94 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  95 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  96 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  97 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  98 import net.pterodactylus.sone.main.SonePlugin;
  99 import net.pterodactylus.sone.utils.IntegerRangePredicate;
 100 import net.pterodactylus.util.config.Configuration;
 101 import net.pterodactylus.util.config.ConfigurationException;
 102 import net.pterodactylus.util.logging.Logging;
 103 import net.pterodactylus.util.number.Numbers;
 104 import net.pterodactylus.util.service.AbstractService;
 105 import net.pterodactylus.util.thread.NamedThreadFactory;
 106
 107 import com.google.common.annotations.VisibleForTesting;
 108 import com.google.common.base.Optional;
 109 import com.google.common.base.Predicates;
 110 import com.google.common.collect.FluentIterable;
 111 import com.google.common.collect.HashMultimap;
 112 import com.google.common.collect.ImmutableSet;
 113 import com.google.common.collect.Multimap;
 114 import com.google.common.collect.Multimaps;
 115 import com.google.common.eventbus.EventBus;
 116 import com.google.common.eventbus.Subscribe;
 117 import com.google.inject.Inject;
 118 import com.google.inject.Singleton;
 119
 120 import freenet.keys.FreenetURI;
 121
 122 /**
 123  * The Sone core.
 124  *
 125  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 126  */
 127 @Singleton
 128 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 129
 130         /** The logger. */
 131         private static final Logger logger = Logging.getLogger(Core.class);
 132
 133         /** The start time. */
 134         private final long startupTime = System.currentTimeMillis();
 135
 136         /** The options. */
 137         private final Options options = new Options();
 138
 139         /** The preferences. */
 140         private final Preferences preferences = new Preferences(options);
 141
 142         /** The event bus. */
 143         private final EventBus eventBus;
 144
 145         /** The configuration. */
 146         private final Configuration configuration;
 147
 148         /** Whether we’re currently saving the configuration. */
 149         private boolean storingConfiguration = false;
 150
 151         /** The identity manager. */
 152         private final IdentityManager identityManager;
 153
 154         /** Interface to freenet. */
 155         private final FreenetInterface freenetInterface;
 156
 157         /** The Sone downloader. */
 158         private final SoneDownloader soneDownloader;
 159
 160         /** The image inserter. */
 161         private final ImageInserter imageInserter;
 162
 163         /** Sone downloader thread-pool. */
 164         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 165
 166         /** The update checker. */
 167         private final UpdateChecker updateChecker;
 168
 169         /** The trust updater. */
 170         private final WebOfTrustUpdater webOfTrustUpdater;
 171
 172         /** The FCP interface. */
 173         private volatile FcpInterface fcpInterface;
 174
 175         /** The times Sones were followed. */
 176         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 177
 178         /** Locked local Sones. */
 179         /* synchronize on itself. */
 180         private final Set<Sone> lockedSones = new HashSet<Sone>();
 181
 182         /** Sone inserters. */
 183         /* synchronize access on this on sones. */
 184         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 185
 186         /** Sone rescuers. */
 187         /* synchronize access on this on sones. */
 188         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 189
 190         /** All Sones. */
 191         /* synchronize access on this on itself. */
 192         private final Map<String, Sone> sones = new HashMap<String, Sone>();
 193
 194         /** All known Sones. */
 195         private final Set<String> knownSones = new HashSet<String>();
 196
 197         /** The post database. */
 198         private final Database database;
 199
 200         /** All bookmarked posts. */
 201         /* synchronize access on itself. */
 202         private final Set<String> bookmarkedPosts = new HashSet<String>();
 203
 204         /** Trusted identities, sorted by own identities. */
 205         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 206
 207         /** All temporary images. */
 208         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 209
 210         /** Ticker for threads that mark own elements as known. */
 211         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 212
 213         /** The time the configuration was last touched. */
 214         private volatile long lastConfigurationUpdate;
 215
 216         /**
 217          * Creates a new core.
 218          *
 219          * @param configuration
 220          *            The configuration of the core
 221          * @param freenetInterface
 222          *            The freenet interface
 223          * @param identityManager
 224          *            The identity manager
 225          * @param webOfTrustUpdater
 226          *            The WebOfTrust updater
 227          * @param eventBus
 228          *            The event bus
 229          * @param database
 230          *            The database
 231          */
 232         @Inject
 233         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 234                 super("Sone Core");
 235                 this.configuration = configuration;
 236                 this.freenetInterface = freenetInterface;
 237                 this.identityManager = identityManager;
 238                 this.soneDownloader = new SoneDownloaderImpl(this, freenetInterface);
 239                 this.imageInserter = new ImageInserter(freenetInterface, freenetInterface.new InsertTokenSupplier());
 240                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 241                 this.webOfTrustUpdater = webOfTrustUpdater;
 242                 this.eventBus = eventBus;
 243                 this.database = database;
 244         }
 245
 246         @VisibleForTesting
 247         protected Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, SoneDownloader soneDownloader, ImageInserter imageInserter, UpdateChecker updateChecker, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 248                 super("Sone Core");
 249                 this.configuration = configuration;
 250                 this.freenetInterface = freenetInterface;
 251                 this.identityManager = identityManager;
 252                 this.soneDownloader = soneDownloader;
 253                 this.imageInserter = imageInserter;
 254                 this.updateChecker = updateChecker;
 255                 this.webOfTrustUpdater = webOfTrustUpdater;
 256                 this.eventBus = eventBus;
 257                 this.database = database;
 258         }
 259
 260         //
 261         // ACCESSORS
 262         //
 263
 264         /**
 265          * Returns the time Sone was started.
 266          *
 267          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 268          */
 269         public long getStartupTime() {
 270                 return startupTime;
 271         }
 272
 273         /**
 274          * Returns the options used by the core.
 275          *
 276          * @return The options of the core
 277          */
 278         public Preferences getPreferences() {
 279                 return preferences;
 280         }
 281
 282         /**
 283          * Returns the identity manager used by the core.
 284          *
 285          * @return The identity manager
 286          */
 287         public IdentityManager getIdentityManager() {
 288                 return identityManager;
 289         }
 290
 291         /**
 292          * Returns the update checker.
 293          *
 294          * @return The update checker
 295          */
 296         public UpdateChecker getUpdateChecker() {
 297                 return updateChecker;
 298         }
 299
 300         /**
 301          * Sets the FCP interface to use.
 302          *
 303          * @param fcpInterface
 304          *            The FCP interface to use
 305          */
 306         public void setFcpInterface(FcpInterface fcpInterface) {
 307                 this.fcpInterface = fcpInterface;
 308         }
 309
 310         /**
 311          * Returns the Sone rescuer for the given local Sone.
 312          *
 313          * @param sone
 314          *            The local Sone to get the rescuer for
 315          * @return The Sone rescuer for the given Sone
 316          */
 317         public SoneRescuer getSoneRescuer(Sone sone) {
 318                 checkNotNull(sone, "sone must not be null");
 319                 checkArgument(sone.isLocal(), "sone must be local");
 320                 synchronized (sones) {
 321                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 322                         if (soneRescuer == null) {
 323                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 324                                 soneRescuers.put(sone, soneRescuer);
 325                                 soneRescuer.start();
 326                         }
 327                         return soneRescuer;
 328                 }
 329         }
 330
 331         /**
 332          * Returns whether the given Sone is currently locked.
 333          *
 334          * @param sone
 335          *            The sone to check
 336          * @return {@code true} if the Sone is locked, {@code false} if it is not
 337          */
 338         public boolean isLocked(Sone sone) {
 339                 synchronized (lockedSones) {
 340                         return lockedSones.contains(sone);
 341                 }
 342         }
 343
 344         /**
 345          * {@inheritDocs}
 346          */
 347         @Override
 348         public Collection<Sone> getSones() {
 349                 synchronized (sones) {
 350                         return ImmutableSet.copyOf(sones.values());
 351                 }
 352         }
 353
 354         /**
 355          * Returns the Sone with the given ID, regardless whether it’s local or
 356          * remote.
 357          *
 358          * @param id
 359          *            The ID of the Sone to get
 360          * @return The Sone with the given ID, or {@code null} if there is no such
 361          *         Sone
 362          */
 363         @Override
 364         public Optional<Sone> getSone(String id) {
 365                 synchronized (sones) {
 366                         return Optional.fromNullable(sones.get(id));
 367                 }
 368         }
 369
 370         /**
 371          * {@inheritDocs}
 372          */
 373         @Override
 374         public Collection<Sone> getLocalSones() {
 375                 synchronized (sones) {
 376                         return FluentIterable.from(sones.values()).filter(LOCAL_SONE_FILTER).toSet();
 377                 }
 378         }
 379
 380         /**
 381          * Returns the local Sone with the given ID, optionally creating a new Sone.
 382          *
 383          * @param id
 384          *            The ID of the Sone
 385          * @param create
 386          *            {@code true} to create a new Sone if none exists,
 387          *            {@code false} to return null if none exists
 388          * @return The Sone with the given ID, or {@code null}
 389          */
 390         public Sone getLocalSone(String id, boolean create) {
 391                 synchronized (sones) {
 392                         Sone sone = sones.get(id);
 393                         if ((sone == null) && create) {
 394                                 sone = new SoneImpl(id, true);
 395                                 sones.put(id, sone);
 396                         }
 397                         if ((sone != null) && !sone.isLocal()) {
 398                                 sone = new SoneImpl(id, true);
 399                                 sones.put(id, sone);
 400                         }
 401                         return sone;
 402                 }
 403         }
 404
 405         /**
 406          * {@inheritDocs}
 407          */
 408         @Override
 409         public Collection<Sone> getRemoteSones() {
 410                 synchronized (sones) {
 411                         return FluentIterable.from(sones.values()).filter(not(LOCAL_SONE_FILTER)).toSet();
 412                 }
 413         }
 414
 415         /**
 416          * Returns the remote Sone with the given ID.
 417          *
 418          * @param id
 419          *            The ID of the remote Sone to get
 420          * @param create
 421          *            {@code true} to always create a Sone, {@code false} to return
 422          *            {@code null} if no Sone with the given ID exists
 423          * @return The Sone with the given ID
 424          */
 425         public Sone getRemoteSone(String id, boolean create) {
 426                 synchronized (sones) {
 427                         Sone sone = sones.get(id);
 428                         if ((sone == null) && create && (id != null) && (id.length() == 43)) {
 429                                 sone = new SoneImpl(id, false);
 430                                 sones.put(id, sone);
 431                         }
 432                         return sone;
 433                 }
 434         }
 435
 436         /**
 437          * Returns whether the given Sone has been modified.
 438          *
 439          * @param sone
 440          *            The Sone to check for modifications
 441          * @return {@code true} if a modification has been detected in the Sone,
 442          *         {@code false} otherwise
 443          */
 444         public boolean isModifiedSone(Sone sone) {
 445                 return soneInserters.containsKey(sone) && soneInserters.get(sone).isModified();
 446         }
 447
 448         /**
 449          * Returns the time when the given was first followed by any local Sone.
 450          *
 451          * @param sone
 452          *            The Sone to get the time for
 453          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 454          *         been followed, or {@link Long#MAX_VALUE}
 455          */
 456         public long getSoneFollowingTime(Sone sone) {
 457                 synchronized (soneFollowingTimes) {
 458                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 459                 }
 460         }
 461
 462         /**
 463          * Returns a post builder.
 464          *
 465          * @return A new post builder
 466          */
 467         public PostBuilder postBuilder() {
 468                 return database.newPostBuilder();
 469         }
 470
 471         /**
 472          * {@inheritDoc}
 473          */
 474         @Override
 475         public Optional<Post> getPost(String postId) {
 476                 return database.getPost(postId);
 477         }
 478
 479         /**
 480          * {@inheritDocs}
 481          */
 482         @Override
 483         public Collection<Post> getPosts(String soneId) {
 484                 return database.getPosts(soneId);
 485         }
 486
 487         /**
 488          * {@inheritDoc}
 489          */
 490         @Override
 491         public Collection<Post> getDirectedPosts(final String recipientId) {
 492                 checkNotNull(recipientId, "recipient must not be null");
 493                 return database.getDirectedPosts(recipientId);
 494         }
 495
 496         /**
 497          * Returns a post reply builder.
 498          *
 499          * @return A new post reply builder
 500          */
 501         public PostReplyBuilder postReplyBuilder() {
 502                 return database.newPostReplyBuilder();
 503         }
 504
 505         /**
 506          * {@inheritDoc}
 507          */
 508         @Override
 509         public Optional<PostReply> getPostReply(String replyId) {
 510                 return database.getPostReply(replyId);
 511         }
 512
 513         /**
 514          * {@inheritDoc}
 515          */
 516         @Override
 517         public List<PostReply> getReplies(final String postId) {
 518                 return database.getReplies(postId);
 519         }
 520
 521         /**
 522          * Returns all Sones that have liked the given post.
 523          *
 524          * @param post
 525          *            The post to get the liking Sones for
 526          * @return The Sones that like the given post
 527          */
 528         public Set<Sone> getLikes(Post post) {
 529                 Set<Sone> sones = new HashSet<Sone>();
 530                 for (Sone sone : getSones()) {
 531                         if (sone.getLikedPostIds().contains(post.getId())) {
 532                                 sones.add(sone);
 533                         }
 534                 }
 535                 return sones;
 536         }
 537
 538         /**
 539          * Returns all Sones that have liked the given reply.
 540          *
 541          * @param reply
 542          *            The reply to get the liking Sones for
 543          * @return The Sones that like the given reply
 544          */
 545         public Set<Sone> getLikes(PostReply reply) {
 546                 Set<Sone> sones = new HashSet<Sone>();
 547                 for (Sone sone : getSones()) {
 548                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 549                                 sones.add(sone);
 550                         }
 551                 }
 552                 return sones;
 553         }
 554
 555         /**
 556          * Returns whether the given post is bookmarked.
 557          *
 558          * @param post
 559          *            The post to check
 560          * @return {@code true} if the given post is bookmarked, {@code false}
 561          *         otherwise
 562          */
 563         public boolean isBookmarked(Post post) {
 564                 return isPostBookmarked(post.getId());
 565         }
 566
 567         /**
 568          * Returns whether the post with the given ID is bookmarked.
 569          *
 570          * @param id
 571          *            The ID of the post to check
 572          * @return {@code true} if the post with the given ID is bookmarked,
 573          *         {@code false} otherwise
 574          */
 575         public boolean isPostBookmarked(String id) {
 576                 synchronized (bookmarkedPosts) {
 577                         return bookmarkedPosts.contains(id);
 578                 }
 579         }
 580
 581         /**
 582          * Returns all currently known bookmarked posts.
 583          *
 584          * @return All bookmarked posts
 585          */
 586         public Set<Post> getBookmarkedPosts() {
 587                 Set<Post> posts = new HashSet<Post>();
 588                 synchronized (bookmarkedPosts) {
 589                         for (String bookmarkedPostId : bookmarkedPosts) {
 590                                 Optional<Post> post = getPost(bookmarkedPostId);
 591                                 if (post.isPresent()) {
 592                                         posts.add(post.get());
 593                                 }
 594                         }
 595                 }
 596                 return posts;
 597         }
 598
 599         public AlbumBuilder albumBuilder() {
 600                 return database.newAlbumBuilder();
 601         }
 602
 603         /**
 604          * Returns the album with the given ID, optionally creating a new album if
 605          * an album with the given ID can not be found.
 606          *
 607          * @param albumId
 608          *            The ID of the album
 609          * @return The album with the given ID, or {@code null} if no album with the
 610          *         given ID exists
 611          */
 612         public Album getAlbum(String albumId) {
 613                 return database.getAlbum(albumId).orNull();
 614         }
 615
 616         public ImageBuilder imageBuilder() {
 617                 return database.newImageBuilder();
 618         }
 619
 620         /**
 621          * Returns the image with the given ID, creating it if necessary.
 622          *
 623          * @param imageId
 624          *            The ID of the image
 625          * @return The image with the given ID
 626          */
 627         public Image getImage(String imageId) {
 628                 return getImage(imageId, true);
 629         }
 630
 631         /**
 632          * Returns the image with the given ID, optionally creating it if it does
 633          * not exist.
 634          *
 635          * @param imageId
 636          *            The ID of the image
 637          * @param create
 638          *            {@code true} to create an image if none exists with the given
 639          *            ID
 640          * @return The image with the given ID, or {@code null} if none exists and
 641          *         none was created
 642          */
 643         public Image getImage(String imageId, boolean create) {
 644                 Optional<Image> image = database.getImage(imageId);
 645                 if (image.isPresent()) {
 646                         return image.get();
 647                 }
 648                 if (!create) {
 649                         return null;
 650                 }
 651                 Image newImage = database.newImageBuilder().withId(imageId).build();
 652                 database.storeImage(newImage);
 653                 return newImage;
 654         }
 655
 656         /**
 657          * Returns the temporary image with the given ID.
 658          *
 659          * @param imageId
 660          *            The ID of the temporary image
 661          * @return The temporary image, or {@code null} if there is no temporary
 662          *         image with the given ID
 663          */
 664         public TemporaryImage getTemporaryImage(String imageId) {
 665                 synchronized (temporaryImages) {
 666                         return temporaryImages.get(imageId);
 667                 }
 668         }
 669
 670         //
 671         // ACTIONS
 672         //
 673
 674         /**
 675          * Locks the given Sone. A locked Sone will not be inserted by
 676          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 677          * again.
 678          *
 679          * @param sone
 680          *            The sone to lock
 681          */
 682         public void lockSone(Sone sone) {
 683                 synchronized (lockedSones) {
 684                         if (lockedSones.add(sone)) {
 685                                 eventBus.post(new SoneLockedEvent(sone));
 686                         }
 687                 }
 688         }
 689
 690         /**
 691          * Unlocks the given Sone.
 692          *
 693          * @see #lockSone(Sone)
 694          * @param sone
 695          *            The sone to unlock
 696          */
 697         public void unlockSone(Sone sone) {
 698                 synchronized (lockedSones) {
 699                         if (lockedSones.remove(sone)) {
 700                                 eventBus.post(new SoneUnlockedEvent(sone));
 701                         }
 702                 }
 703         }
 704
 705         /**
 706          * Adds a local Sone from the given own identity.
 707          *
 708          * @param ownIdentity
 709          *            The own identity to create a Sone from
 710          * @return The added (or already existing) Sone
 711          */
 712         public Sone addLocalSone(OwnIdentity ownIdentity) {
 713                 if (ownIdentity == null) {
 714                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 715                         return null;
 716                 }
 717                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 718                 synchronized (sones) {
 719                         final Sone sone;
 720                         try {
 721                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 722                         } catch (MalformedURLException mue1) {
 723                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 724                                 return null;
 725                         }
 726                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 727                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 728                         sone.setKnown(true);
 729                         /* TODO - load posts ’n stuff */
 730                         sones.put(ownIdentity.getId(), sone);
 731                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 732                         soneInserters.put(sone, soneInserter);
 733                         sone.setStatus(SoneStatus.idle);
 734                         loadSone(sone);
 735                         soneInserter.start();
 736                         return sone;
 737                 }
 738         }
 739
 740         /**
 741          * Creates a new Sone for the given own identity.
 742          *
 743          * @param ownIdentity
 744          *            The own identity to create a Sone for
 745          * @return The created Sone
 746          */
 747         public Sone createSone(OwnIdentity ownIdentity) {
 748                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 749                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 750                         return null;
 751                 }
 752                 Sone sone = addLocalSone(ownIdentity);
 753
 754                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 755                 touchConfiguration();
 756                 return sone;
 757         }
 758
 759         /**
 760          * Adds the Sone of the given identity.
 761          *
 762          * @param identity
 763          *            The identity whose Sone to add
 764          * @return The added or already existing Sone
 765          */
 766         public Sone addRemoteSone(Identity identity) {
 767                 if (identity == null) {
 768                         logger.log(Level.WARNING, "Given Identity is null!");
 769                         return null;
 770                 }
 771                 final Long latestEdition = tryParse(fromNullable(
 772                                 identity.getProperty("Sone.LatestEdition")).or("0"));
 773                 synchronized (sones) {
 774                         final Sone sone = getRemoteSone(identity.getId(), true);
 775                         if (sone.isLocal()) {
 776                                 return sone;
 777                         }
 778                         sone.setIdentity(identity);
 779                         boolean newSone = sone.getRequestUri() == null;
 780                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 781                         sone.setLatestEdition(latestEdition);
 782                         if (newSone) {
 783                                 synchronized (knownSones) {
 784                                         newSone = !knownSones.contains(sone.getId());
 785                                 }
 786                                 sone.setKnown(!newSone);
 787                                 if (newSone) {
 788                                         eventBus.post(new NewSoneFoundEvent(sone));
 789                                         for (Sone localSone : getLocalSones()) {
 790                                                 if (localSone.getOptions().isAutoFollow()) {
 791                                                         followSone(localSone, sone.getId());
 792                                                 }
 793                                         }
 794                                 }
 795                         }
 796                         soneDownloader.addSone(sone);
 797                         soneDownloaders.execute(soneDownloader.fetchSoneWithUriAction(sone));
 798                         return sone;
 799                 }
 800         }
 801
 802         /**
 803          * Lets the given local Sone follow the Sone with the given ID.
 804          *
 805          * @param sone
 806          *            The local Sone that should follow another Sone
 807          * @param soneId
 808          *            The ID of the Sone to follow
 809          */
 810         public void followSone(Sone sone, String soneId) {
 811                 checkNotNull(sone, "sone must not be null");
 812                 checkNotNull(soneId, "soneId must not be null");
 813                 sone.addFriend(soneId);
 814                 synchronized (soneFollowingTimes) {
 815                         if (!soneFollowingTimes.containsKey(soneId)) {
 816                                 long now = System.currentTimeMillis();
 817                                 soneFollowingTimes.put(soneId, now);
 818                                 Optional<Sone> followedSone = getSone(soneId);
 819                                 if (!followedSone.isPresent()) {
 820                                         return;
 821                                 }
 822                                 for (Post post : followedSone.get().getPosts()) {
 823                                         if (post.getTime() < now) {
 824                                                 markPostKnown(post);
 825                                         }
 826                                 }
 827                                 for (PostReply reply : followedSone.get().getReplies()) {
 828                                         if (reply.getTime() < now) {
 829                                                 markReplyKnown(reply);
 830                                         }
 831                                 }
 832                         }
 833                 }
 834                 touchConfiguration();
 835         }
 836
 837         /**
 838          * Lets the given local Sone unfollow the Sone with the given ID.
 839          *
 840          * @param sone
 841          *            The local Sone that should unfollow another Sone
 842          * @param soneId
 843          *            The ID of the Sone being unfollowed
 844          */
 845         public void unfollowSone(Sone sone, String soneId) {
 846                 checkNotNull(sone, "sone must not be null");
 847                 checkNotNull(soneId, "soneId must not be null");
 848                 sone.removeFriend(soneId);
 849                 boolean unfollowedSoneStillFollowed = false;
 850                 for (Sone localSone : getLocalSones()) {
 851                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 852                 }
 853                 if (!unfollowedSoneStillFollowed) {
 854                         synchronized (soneFollowingTimes) {
 855                                 soneFollowingTimes.remove(soneId);
 856                         }
 857                 }
 858                 touchConfiguration();
 859         }
 860
 861         /**
 862          * Sets the trust value of the given origin Sone for the target Sone.
 863          *
 864          * @param origin
 865          *            The origin Sone
 866          * @param target
 867          *            The target Sone
 868          * @param trustValue
 869          *            The trust value (from {@code -100} to {@code 100})
 870          */
 871         public void setTrust(Sone origin, Sone target, int trustValue) {
 872                 checkNotNull(origin, "origin must not be null");
 873                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 874                 checkNotNull(target, "target must not be null");
 875                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 876                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 877         }
 878
 879         /**
 880          * Removes any trust assignment for the given target Sone.
 881          *
 882          * @param origin
 883          *            The trust origin
 884          * @param target
 885          *            The trust target
 886          */
 887         public void removeTrust(Sone origin, Sone target) {
 888                 checkNotNull(origin, "origin must not be null");
 889                 checkNotNull(target, "target must not be null");
 890                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 891                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 892         }
 893
 894         /**
 895          * Assigns the configured positive trust value for the given target.
 896          *
 897          * @param origin
 898          *            The trust origin
 899          * @param target
 900          *            The trust target
 901          */
 902         public void trustSone(Sone origin, Sone target) {
 903                 setTrust(origin, target, preferences.getPositiveTrust());
 904         }
 905
 906         /**
 907          * Assigns the configured negative trust value for the given target.
 908          *
 909          * @param origin
 910          *            The trust origin
 911          * @param target
 912          *            The trust target
 913          */
 914         public void distrustSone(Sone origin, Sone target) {
 915                 setTrust(origin, target, preferences.getNegativeTrust());
 916         }
 917
 918         /**
 919          * Removes the trust assignment for the given target.
 920          *
 921          * @param origin
 922          *            The trust origin
 923          * @param target
 924          *            The trust target
 925          */
 926         public void untrustSone(Sone origin, Sone target) {
 927                 removeTrust(origin, target);
 928         }
 929
 930         /**
 931          * Updates the stored Sone with the given Sone.
 932          *
 933          * @param sone
 934          *            The updated Sone
 935          */
 936         public void updateSone(Sone sone) {
 937                 updateSone(sone, false);
 938         }
 939
 940         /**
 941          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 942          * {@code true}, an older Sone than the current Sone can be given to restore
 943          * an old state.
 944          *
 945          * @param sone
 946          *            The Sone to update
 947          * @param soneRescueMode
 948          *            {@code true} if the stored Sone should be updated regardless
 949          *            of the age of the given Sone
 950          */
 951         public void updateSone(final Sone sone, boolean soneRescueMode) {
 952                 Optional<Sone> storedSone = getSone(sone.getId());
 953                 if (storedSone.isPresent()) {
 954                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 955                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 956                                 return;
 957                         }
 958                         /* find removed posts. */
 959                         SoneChangeDetector soneChangeDetector = new SoneChangeDetector(storedSone.get());
 960                         soneChangeDetector.onNewPosts(new PostProcessor() {
 961                                 @Override
 962                                 public void processPost(Post post) {
 963                                         if (post.getTime() < getSoneFollowingTime(sone)) {
 964                                                 post.setKnown(true);
 965                                         } else if (!post.isKnown()) {
 966                                                 eventBus.post(new NewPostFoundEvent(post));
 967                                         }
 968                                 }
 969                         });
 970                         soneChangeDetector.onRemovedPosts(new PostProcessor() {
 971                                 @Override
 972                                 public void processPost(Post post) {
 973                                         eventBus.post(new PostRemovedEvent(post));
 974                                 }
 975                         });
 976                         soneChangeDetector.onNewPostReplies(new PostReplyProcessor() {
 977                                 @Override
 978                                 public void processPostReply(PostReply postReply) {
 979                                         if (postReply.getTime() < getSoneFollowingTime(sone)) {
 980                                                 postReply.setKnown(true);
 981                                         } else if (!postReply.isKnown()) {
 982                                                 eventBus.post(new NewPostReplyFoundEvent(postReply));
 983                                         }
 984                                 }
 985                         });
 986                         soneChangeDetector.onRemovedPostReplies(new PostReplyProcessor() {
 987                                 @Override
 988                                 public void processPostReply(PostReply postReply) {
 989                                         eventBus.post(new PostReplyRemovedEvent(postReply));
 990                                 }
 991                         });
 992                         soneChangeDetector.detectChanges(sone);
 993                         database.storeSone(sone);
 994                         synchronized (sones) {
 995                                 sone.setOptions(storedSone.get().getOptions());
 996                                 sone.setKnown(storedSone.get().isKnown());
 997                                 sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
 998                                 if (sone.isLocal()) {
 999                                         soneInserters.get(storedSone.get()).setSone(sone);
1000                                         touchConfiguration();
1001                                 }
1002                                 sones.put(sone.getId(), sone);
1003                         }
1004                 }
1005         }
1006
1007         /**
1008          * Deletes the given Sone. This will remove the Sone from the
1009          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1010          * remove the context from its identity.
1011          *
1012          * @param sone
1013          *            The Sone to delete
1014          */
1015         public void deleteSone(Sone sone) {
1016                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1017                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1018                         return;
1019                 }
1020                 synchronized (sones) {
1021                         if (!getLocalSones().contains(sone)) {
1022                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1023                                 return;
1024                         }
1025                         sones.remove(sone.getId());
1026                         SoneInserter soneInserter = soneInserters.remove(sone);
1027                         soneInserter.stop();
1028                 }
1029                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1030                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1031                 try {
1032                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1033                 } catch (ConfigurationException ce1) {
1034                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1035                 }
1036         }
1037
1038         /**
1039          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1040          * known} before, a {@link MarkSoneKnownEvent} is fired.
1041          *
1042          * @param sone
1043          *            The Sone to mark as known
1044          */
1045         public void markSoneKnown(Sone sone) {
1046                 if (!sone.isKnown()) {
1047                         sone.setKnown(true);
1048                         synchronized (knownSones) {
1049                                 knownSones.add(sone.getId());
1050                         }
1051                         eventBus.post(new MarkSoneKnownEvent(sone));
1052                         touchConfiguration();
1053                 }
1054         }
1055
1056         /**
1057          * Loads and updates the given Sone from the configuration. If any error is
1058          * encountered, loading is aborted and the given Sone is not changed.
1059          *
1060          * @param sone
1061          *            The Sone to load and update
1062          */
1063         public void loadSone(Sone sone) {
1064                 if (!sone.isLocal()) {
1065                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1066                         return;
1067                 }
1068                 logger.info(String.format("Loading local Sone: %s", sone));
1069
1070                 /* load Sone. */
1071                 String sonePrefix = "Sone/" + sone.getId();
1072                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1073                 if (soneTime == null) {
1074                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1075                         return;
1076                 }
1077                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1078
1079                 /* load profile. */
1080                 ConfigurationSoneParser configurationSoneParser = new ConfigurationSoneParser(configuration, sone);
1081                 Profile profile = configurationSoneParser.parseProfile();
1082
1083                 /* load posts. */
1084                 Collection<Post> posts;
1085                 try {
1086                         posts = configurationSoneParser.parsePosts(database);
1087                 } catch (InvalidPostFound ipf) {
1088                         logger.log(Level.WARNING, "Invalid post found, aborting load!");
1089                         return;
1090                 }
1091
1092                 /* load replies. */
1093                 Collection<PostReply> replies;
1094                 try {
1095                         replies = configurationSoneParser.parsePostReplies(database);
1096                 } catch (InvalidPostReplyFound iprf) {
1097                         logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1098                         return;
1099                 }
1100
1101                 /* load post likes. */
1102                 Set<String> likedPostIds =
1103                                 configurationSoneParser.parseLikedPostIds();
1104
1105                 /* load reply likes. */
1106                 Set<String> likedReplyIds =
1107                                 configurationSoneParser.parseLikedPostReplyIds();
1108
1109                 /* load friends. */
1110                 Set<String> friends = configurationSoneParser.parseFriends();
1111
1112                 /* load albums. */
1113                 List<Album> topLevelAlbums;
1114                 try {
1115                         topLevelAlbums =
1116                                         configurationSoneParser.parseTopLevelAlbums(database);
1117                 } catch (InvalidAlbumFound iaf) {
1118                         logger.log(Level.WARNING, "Invalid album found, aborting load!");
1119                         return;
1120                 } catch (InvalidParentAlbumFound ipaf) {
1121                         logger.log(Level.WARNING, format("Invalid parent album ID: %s",
1122                                         ipaf.getAlbumParentId()));
1123                         return;
1124                 }
1125
1126                 /* load images. */
1127                 try {
1128                         configurationSoneParser.parseImages(database);
1129                 } catch (InvalidImageFound iif) {
1130                         logger.log(WARNING, "Invalid image found, aborting load!");
1131                         return;
1132                 } catch (InvalidParentAlbumFound ipaf) {
1133                         logger.log(Level.WARNING,
1134                                         format("Invalid album image (%s) encountered, aborting load!",
1135                                                         ipaf.getAlbumParentId()));
1136                         return;
1137                 }
1138
1139                 /* load avatar. */
1140                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1141                 if (avatarId != null) {
1142                         final Map<String, Image> images =
1143                                         configurationSoneParser.getImages();
1144                         profile.setAvatar(images.get(avatarId));
1145                 }
1146
1147                 /* load options. */
1148                 sone.getOptions().setAutoFollow(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1149                 sone.getOptions().setSoneInsertNotificationEnabled(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1150                 sone.getOptions().setShowNewSoneNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1151                 sone.getOptions().setShowNewPostNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1152                 sone.getOptions().setShowNewReplyNotifications(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1153                 sone.getOptions().setShowCustomAvatars(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1154
1155                 /* if we’re still here, Sone was loaded successfully. */
1156                 synchronized (sone) {
1157                         sone.setTime(soneTime);
1158                         sone.setProfile(profile);
1159                         sone.setPosts(posts);
1160                         sone.setReplies(replies);
1161                         sone.setLikePostIds(likedPostIds);
1162                         sone.setLikeReplyIds(likedReplyIds);
1163                         for (String friendId : friends) {
1164                                 followSone(sone, friendId);
1165                         }
1166                         for (Album album : sone.getRootAlbum().getAlbums()) {
1167                                 sone.getRootAlbum().removeAlbum(album);
1168                         }
1169                         for (Album album : topLevelAlbums) {
1170                                 sone.getRootAlbum().addAlbum(album);
1171                         }
1172                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1173                         for (Album album : toAllAlbums.apply(sone)) {
1174                                 database.storeAlbum(album);
1175                                 for (Image image : album.getImages()) {
1176                                         database.storeImage(image);
1177                                 }
1178                         }
1179                 }
1180                 synchronized (knownSones) {
1181                         for (String friend : friends) {
1182                                 knownSones.add(friend);
1183                         }
1184                 }
1185                 database.storePosts(sone, posts);
1186                 for (Post post : posts) {
1187                         post.setKnown(true);
1188                 }
1189                 database.storePostReplies(sone, replies);
1190                 for (PostReply reply : replies) {
1191                         reply.setKnown(true);
1192                 }
1193
1194                 logger.info(String.format("Sone loaded successfully: %s", sone));
1195         }
1196
1197         /**
1198          * Creates a new post.
1199          *
1200          * @param sone
1201          *            The Sone that creates the post
1202          * @param recipient
1203          *            The recipient Sone, or {@code null} if this post does not have
1204          *            a recipient
1205          * @param text
1206          *            The text of the post
1207          * @return The created post
1208          */
1209         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
1210                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1211         }
1212
1213         /**
1214          * Creates a new post.
1215          *
1216          * @param sone
1217          *            The Sone that creates the post
1218          * @param recipient
1219          *            The recipient Sone, or {@code null} if this post does not have
1220          *            a recipient
1221          * @param time
1222          *            The time of the post
1223          * @param text
1224          *            The text of the post
1225          * @return The created post
1226          */
1227         public Post createPost(Sone sone, Optional<Sone> recipient, long time, String text) {
1228                 checkNotNull(text, "text must not be null");
1229                 checkArgument(text.trim().length() > 0, "text must not be empty");
1230                 if (!sone.isLocal()) {
1231                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1232                         return null;
1233                 }
1234                 PostBuilder postBuilder = database.newPostBuilder();
1235                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1236                 if (recipient.isPresent()) {
1237                         postBuilder.to(recipient.get().getId());
1238                 }
1239                 final Post post = postBuilder.build();
1240                 database.storePost(post);
1241                 eventBus.post(new NewPostFoundEvent(post));
1242                 sone.addPost(post);
1243                 touchConfiguration();
1244                 localElementTicker.schedule(new MarkPostKnown(post), 10, TimeUnit.SECONDS);
1245                 return post;
1246         }
1247
1248         /**
1249          * Deletes the given post.
1250          *
1251          * @param post
1252          *            The post to delete
1253          */
1254         public void deletePost(Post post) {
1255                 if (!post.getSone().isLocal()) {
1256                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1257                         return;
1258                 }
1259                 database.removePost(post);
1260                 eventBus.post(new PostRemovedEvent(post));
1261                 markPostKnown(post);
1262                 touchConfiguration();
1263         }
1264
1265         /**
1266          * Marks the given post as known, if it is currently not a known post
1267          * (according to {@link Post#isKnown()}).
1268          *
1269          * @param post
1270          *            The post to mark as known
1271          */
1272         public void markPostKnown(Post post) {
1273                 post.setKnown(true);
1274                 eventBus.post(new MarkPostKnownEvent(post));
1275                 touchConfiguration();
1276                 for (PostReply reply : getReplies(post.getId())) {
1277                         markReplyKnown(reply);
1278                 }
1279         }
1280
1281         /**
1282          * Bookmarks the post with the given ID.
1283          *
1284          * @param id
1285          *            The ID of the post to bookmark
1286          */
1287         public void bookmarkPost(String id) {
1288                 synchronized (bookmarkedPosts) {
1289                         bookmarkedPosts.add(id);
1290                 }
1291         }
1292
1293         /**
1294          * Removes the given post from the bookmarks.
1295          *
1296          * @param post
1297          *            The post to unbookmark
1298          */
1299         public void unbookmark(Post post) {
1300                 unbookmarkPost(post.getId());
1301         }
1302
1303         /**
1304          * Removes the post with the given ID from the bookmarks.
1305          *
1306          * @param id
1307          *            The ID of the post to unbookmark
1308          */
1309         public void unbookmarkPost(String id) {
1310                 synchronized (bookmarkedPosts) {
1311                         bookmarkedPosts.remove(id);
1312                 }
1313         }
1314
1315         /**
1316          * Creates a new reply.
1317          *
1318          * @param sone
1319          *            The Sone that creates the reply
1320          * @param post
1321          *            The post that this reply refers to
1322          * @param text
1323          *            The text of the reply
1324          * @return The created reply
1325          */
1326         public PostReply createReply(Sone sone, Post post, String text) {
1327                 checkNotNull(text, "text must not be null");
1328                 checkArgument(text.trim().length() > 0, "text must not be empty");
1329                 if (!sone.isLocal()) {
1330                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1331                         return null;
1332                 }
1333                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1334                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1335                 final PostReply reply = postReplyBuilder.build();
1336                 database.storePostReply(reply);
1337                 eventBus.post(new NewPostReplyFoundEvent(reply));
1338                 sone.addReply(reply);
1339                 touchConfiguration();
1340                 localElementTicker.schedule(new MarkReplyKnown(reply), 10, TimeUnit.SECONDS);
1341                 return reply;
1342         }
1343
1344         /**
1345          * Deletes the given reply.
1346          *
1347          * @param reply
1348          *            The reply to delete
1349          */
1350         public void deleteReply(PostReply reply) {
1351                 Sone sone = reply.getSone();
1352                 if (!sone.isLocal()) {
1353                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1354                         return;
1355                 }
1356                 database.removePostReply(reply);
1357                 markReplyKnown(reply);
1358                 sone.removeReply(reply);
1359                 touchConfiguration();
1360         }
1361
1362         /**
1363          * Marks the given reply as known, if it is currently not a known reply
1364          * (according to {@link Reply#isKnown()}).
1365          *
1366          * @param reply
1367          *            The reply to mark as known
1368          */
1369         public void markReplyKnown(PostReply reply) {
1370                 boolean previouslyKnown = reply.isKnown();
1371                 reply.setKnown(true);
1372                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1373                 if (!previouslyKnown) {
1374                         touchConfiguration();
1375                 }
1376         }
1377
1378         /**
1379          * Creates a new album for the given Sone.
1380          *
1381          * @param sone
1382          *            The Sone to create the album for
1383          * @param parent
1384          *            The parent of the album (may be {@code null} to create a
1385          *            top-level album)
1386          * @return The new album
1387          */
1388         public Album createAlbum(Sone sone, Album parent) {
1389                 Album album = database.newAlbumBuilder().randomId().by(sone).build();
1390                 database.storeAlbum(album);
1391                 parent.addAlbum(album);
1392                 return album;
1393         }
1394
1395         /**
1396          * Deletes the given album. The owner of the album has to be a local Sone,
1397          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1398          *
1399          * @param album
1400          *            The album to remove
1401          */
1402         public void deleteAlbum(Album album) {
1403                 checkNotNull(album, "album must not be null");
1404                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1405                 if (!album.isEmpty()) {
1406                         return;
1407                 }
1408                 album.getParent().removeAlbum(album);
1409                 database.removeAlbum(album);
1410                 touchConfiguration();
1411         }
1412
1413         /**
1414          * Creates a new image.
1415          *
1416          * @param sone
1417          *            The Sone creating the image
1418          * @param album
1419          *            The album the image will be inserted into
1420          * @param temporaryImage
1421          *            The temporary image to create the image from
1422          * @return The newly created image
1423          */
1424         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1425                 checkNotNull(sone, "sone must not be null");
1426                 checkNotNull(album, "album must not be null");
1427                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1428                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1429                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1430                 Image image = database.newImageBuilder().withId(temporaryImage.getId()).build().modify().setSone(sone).setCreationTime(System.currentTimeMillis()).update();
1431                 album.addImage(image);
1432                 database.storeImage(image);
1433                 imageInserter.insertImage(temporaryImage, image);
1434                 return image;
1435         }
1436
1437         /**
1438          * Deletes the given image. This method will also delete a matching
1439          * temporary image.
1440          *
1441          * @see #deleteTemporaryImage(String)
1442          * @param image
1443          *            The image to delete
1444          */
1445         public void deleteImage(Image image) {
1446                 checkNotNull(image, "image must not be null");
1447                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1448                 deleteTemporaryImage(image.getId());
1449                 image.getAlbum().removeImage(image);
1450                 database.removeImage(image);
1451                 touchConfiguration();
1452         }
1453
1454         /**
1455          * Creates a new temporary image.
1456          *
1457          * @param mimeType
1458          *            The MIME type of the temporary image
1459          * @param imageData
1460          *            The encoded data of the image
1461          * @return The temporary image
1462          */
1463         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1464                 TemporaryImage temporaryImage = new TemporaryImage();
1465                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1466                 synchronized (temporaryImages) {
1467                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1468                 }
1469                 return temporaryImage;
1470         }
1471
1472         /**
1473          * Deletes the temporary image with the given ID.
1474          *
1475          * @param imageId
1476          *            The ID of the temporary image to delete
1477          */
1478         public void deleteTemporaryImage(String imageId) {
1479                 checkNotNull(imageId, "imageId must not be null");
1480                 synchronized (temporaryImages) {
1481                         temporaryImages.remove(imageId);
1482                 }
1483                 Image image = getImage(imageId, false);
1484                 if (image != null) {
1485                         imageInserter.cancelImageInsert(image);
1486                 }
1487         }
1488
1489         /**
1490          * Notifies the core that the configuration, either of the core or of a
1491          * single local Sone, has changed, and that the configuration should be
1492          * saved.
1493          */
1494         public void touchConfiguration() {
1495                 lastConfigurationUpdate = System.currentTimeMillis();
1496         }
1497
1498         //
1499         // SERVICE METHODS
1500         //
1501
1502         /**
1503          * Starts the core.
1504          */
1505         @Override
1506         public void serviceStart() {
1507                 loadConfiguration();
1508                 updateChecker.start();
1509                 identityManager.start();
1510                 webOfTrustUpdater.init();
1511                 webOfTrustUpdater.start();
1512                 database.start();
1513         }
1514
1515         /**
1516          * {@inheritDoc}
1517          */
1518         @Override
1519         public void serviceRun() {
1520                 long lastSaved = System.currentTimeMillis();
1521                 while (!shouldStop()) {
1522                         sleep(1000);
1523                         long now = System.currentTimeMillis();
1524                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1525                                 for (Sone localSone : getLocalSones()) {
1526                                         saveSone(localSone);
1527                                 }
1528                                 saveConfiguration();
1529                                 lastSaved = now;
1530                         }
1531                 }
1532         }
1533
1534         /**
1535          * Stops the core.
1536          */
1537         @Override
1538         public void serviceStop() {
1539                 localElementTicker.shutdownNow();
1540                 synchronized (sones) {
1541                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1542                                 soneInserter.getValue().stop();
1543                                 saveSone(getLocalSone(soneInserter.getKey().getId(), false));
1544                         }
1545                 }
1546                 saveConfiguration();
1547                 database.stop();
1548                 webOfTrustUpdater.stop();
1549                 updateChecker.stop();
1550                 soneDownloader.stop();
1551                 soneDownloaders.shutdown();
1552                 identityManager.stop();
1553         }
1554
1555         //
1556         // PRIVATE METHODS
1557         //
1558
1559         /**
1560          * Saves the given Sone. This will persist all local settings for the given
1561          * Sone, such as the friends list and similar, private options.
1562          *
1563          * @param sone
1564          *            The Sone to save
1565          */
1566         private synchronized void saveSone(Sone sone) {
1567                 if (!sone.isLocal()) {
1568                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1569                         return;
1570                 }
1571                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1572                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1573                         return;
1574                 }
1575
1576                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1577                 try {
1578                         /* save Sone into configuration. */
1579                         String sonePrefix = "Sone/" + sone.getId();
1580                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1581                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1582
1583                         /* save profile. */
1584                         Profile profile = sone.getProfile();
1585                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1586                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1587                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1588                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1589                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1590                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1591                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1592
1593                         /* save profile fields. */
1594                         int fieldCounter = 0;
1595                         for (Field profileField : profile.getFields()) {
1596                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1597                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1598                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1599                         }
1600                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1601
1602                         /* save posts. */
1603                         int postCounter = 0;
1604                         for (Post post : sone.getPosts()) {
1605                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1606                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1607                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1608                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1609                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1610                         }
1611                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1612
1613                         /* save replies. */
1614                         int replyCounter = 0;
1615                         for (PostReply reply : sone.getReplies()) {
1616                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1617                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1618                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1619                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1620                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1621                         }
1622                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1623
1624                         /* save post likes. */
1625                         int postLikeCounter = 0;
1626                         for (String postId : sone.getLikedPostIds()) {
1627                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1628                         }
1629                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1630
1631                         /* save reply likes. */
1632                         int replyLikeCounter = 0;
1633                         for (String replyId : sone.getLikedReplyIds()) {
1634                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1635                         }
1636                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1637
1638                         /* save friends. */
1639                         int friendCounter = 0;
1640                         for (String friendId : sone.getFriends()) {
1641                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1642                         }
1643                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1644
1645                         /* save albums. first, collect in a flat structure, top-level first. */
1646                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1647
1648                         int albumCounter = 0;
1649                         for (Album album : albums) {
1650                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1651                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1652                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1653                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1654                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1655                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1656                         }
1657                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1658
1659                         /* save images. */
1660                         int imageCounter = 0;
1661                         for (Album album : albums) {
1662                                 for (Image image : album.getImages()) {
1663                                         if (!image.isInserted()) {
1664                                                 continue;
1665                                         }
1666                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1667                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1668                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1669                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1670                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1671                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1672                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1673                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1674                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1675                                 }
1676                         }
1677                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1678
1679                         /* save options. */
1680                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().isAutoFollow());
1681                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().isSoneInsertNotificationEnabled());
1682                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().isShowNewSoneNotifications());
1683                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().isShowNewPostNotifications());
1684                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().isShowNewReplyNotifications());
1685                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().getShowCustomAvatars().name());
1686
1687                         configuration.save();
1688
1689                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1690
1691                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1692                 } catch (ConfigurationException ce1) {
1693                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1694                 }
1695         }
1696
1697         /**
1698          * Saves the current options.
1699          */
1700         private void saveConfiguration() {
1701                 synchronized (configuration) {
1702                         if (storingConfiguration) {
1703                                 logger.log(Level.FINE, "Already storing configuration…");
1704                                 return;
1705                         }
1706                         storingConfiguration = true;
1707                 }
1708
1709                 /* store the options first. */
1710                 try {
1711                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
1712                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1713                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
1714                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
1715                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
1716                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
1717                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
1718                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
1719                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
1720                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
1721                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
1722                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
1723
1724                         /* save known Sones. */
1725                         int soneCounter = 0;
1726                         synchronized (knownSones) {
1727                                 for (String knownSoneId : knownSones) {
1728                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1729                                 }
1730                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1731                         }
1732
1733                         /* save Sone following times. */
1734                         soneCounter = 0;
1735                         synchronized (soneFollowingTimes) {
1736                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1737                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1738                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1739                                         ++soneCounter;
1740                                 }
1741                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1742                         }
1743
1744                         /* save known posts. */
1745                         database.save();
1746
1747                         /* save bookmarked posts. */
1748                         int bookmarkedPostCounter = 0;
1749                         synchronized (bookmarkedPosts) {
1750                                 for (String bookmarkedPostId : bookmarkedPosts) {
1751                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
1752                                 }
1753                         }
1754                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
1755
1756                         /* now save it. */
1757                         configuration.save();
1758
1759                 } catch (ConfigurationException ce1) {
1760                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1761                 } catch (DatabaseException de1) {
1762                         logger.log(Level.SEVERE, "Could not save database!", de1);
1763                 } finally {
1764                         synchronized (configuration) {
1765                                 storingConfiguration = false;
1766                         }
1767                 }
1768         }
1769
1770         /**
1771          * Loads the configuration.
1772          */
1773         private void loadConfiguration() {
1774                 /* create options. */
1775                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new SetInsertionDelay()));
1776                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
1777                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
1778                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
1779                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
1780                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
1781                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
1782                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
1783                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
1784                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, fcpInterface.new SetActive()));
1785                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, fcpInterface.new SetFullAccessRequired()));
1786
1787                 loadConfigurationValue("InsertionDelay");
1788                 loadConfigurationValue("PostsPerPage");
1789                 loadConfigurationValue("ImagesPerPage");
1790                 loadConfigurationValue("CharactersPerPost");
1791                 loadConfigurationValue("PostCutOffLength");
1792                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
1793                 loadConfigurationValue("PositiveTrust");
1794                 loadConfigurationValue("NegativeTrust");
1795                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
1796                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
1797                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
1798
1799                 /* load known Sones. */
1800                 int soneCounter = 0;
1801                 while (true) {
1802                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1803                         if (knownSoneId == null) {
1804                                 break;
1805                         }
1806                         synchronized (knownSones) {
1807                                 knownSones.add(knownSoneId);
1808                         }
1809                 }
1810
1811                 /* load Sone following times. */
1812                 soneCounter = 0;
1813                 while (true) {
1814                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
1815                         if (soneId == null) {
1816                                 break;
1817                         }
1818                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
1819                         synchronized (soneFollowingTimes) {
1820                                 soneFollowingTimes.put(soneId, time);
1821                         }
1822                         ++soneCounter;
1823                 }
1824
1825                 /* load bookmarked posts. */
1826                 int bookmarkedPostCounter = 0;
1827                 while (true) {
1828                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
1829                         if (bookmarkedPostId == null) {
1830                                 break;
1831                         }
1832                         synchronized (bookmarkedPosts) {
1833                                 bookmarkedPosts.add(bookmarkedPostId);
1834                         }
1835                 }
1836
1837         }
1838
1839         /**
1840          * Loads an {@link Integer} configuration value for the option with the
1841          * given name, logging validation failures.
1842          *
1843          * @param optionName
1844          *            The name of the option to load
1845          */
1846         private void loadConfigurationValue(String optionName) {
1847                 try {
1848                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
1849                 } catch (IllegalArgumentException iae1) {
1850                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
1851                 }
1852         }
1853
1854         /**
1855          * Notifies the core that a new {@link OwnIdentity} was added.
1856          *
1857          * @param ownIdentityAddedEvent
1858          *            The event
1859          */
1860         @Subscribe
1861         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
1862                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
1863                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
1864                 if (ownIdentity.hasContext("Sone")) {
1865                         addLocalSone(ownIdentity);
1866                 }
1867         }
1868
1869         /**
1870          * Notifies the core that an {@link OwnIdentity} was removed.
1871          *
1872          * @param ownIdentityRemovedEvent
1873          *            The event
1874          */
1875         @Subscribe
1876         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
1877                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
1878                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
1879                 trustedIdentities.removeAll(ownIdentity);
1880         }
1881
1882         /**
1883          * Notifies the core that a new {@link Identity} was added.
1884          *
1885          * @param identityAddedEvent
1886          *            The event
1887          */
1888         @Subscribe
1889         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
1890                 Identity identity = identityAddedEvent.identity();
1891                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
1892                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
1893                 addRemoteSone(identity);
1894         }
1895
1896         /**
1897          * Notifies the core that an {@link Identity} was updated.
1898          *
1899          * @param identityUpdatedEvent
1900          *            The event
1901          */
1902         @Subscribe
1903         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
1904                 Identity identity = identityUpdatedEvent.identity();
1905                 final Sone sone = getRemoteSone(identity.getId(), false);
1906                 if (sone.isLocal()) {
1907                         return;
1908                 }
1909                 sone.setIdentity(identity);
1910                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
1911                 soneDownloader.addSone(sone);
1912                 soneDownloaders.execute(soneDownloader.fetchSoneAction(sone));
1913         }
1914
1915         /**
1916          * Notifies the core that an {@link Identity} was removed.
1917          *
1918          * @param identityRemovedEvent
1919          *            The event
1920          */
1921         @Subscribe
1922         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
1923                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
1924                 Identity identity = identityRemovedEvent.identity();
1925                 trustedIdentities.remove(ownIdentity, identity);
1926                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
1927                         if (trustedIdentity.getKey().equals(ownIdentity)) {
1928                                 continue;
1929                         }
1930                         if (trustedIdentity.getValue().contains(identity)) {
1931                                 return;
1932                         }
1933                 }
1934                 Optional<Sone> sone = getSone(identity.getId());
1935                 if (!sone.isPresent()) {
1936                         /* TODO - we don’t have the Sone anymore. should this happen? */
1937                         return;
1938                 }
1939                 database.removePosts(sone.get());
1940                 for (Post post : sone.get().getPosts()) {
1941                         eventBus.post(new PostRemovedEvent(post));
1942                 }
1943                 database.removePostReplies(sone.get());
1944                 for (PostReply reply : sone.get().getReplies()) {
1945                         eventBus.post(new PostReplyRemovedEvent(reply));
1946                 }
1947                 synchronized (sones) {
1948                         sones.remove(identity.getId());
1949                 }
1950                 eventBus.post(new SoneRemovedEvent(sone.get()));
1951         }
1952
1953         /**
1954          * Deletes the temporary image.
1955          *
1956          * @param imageInsertFinishedEvent
1957          *            The event
1958          */
1959         @Subscribe
1960         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
1961                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
1962                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
1963                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
1964                 touchConfiguration();
1965         }
1966
1967         @VisibleForTesting
1968         class MarkPostKnown implements Runnable {
1969
1970                 private final Post post;
1971
1972                 public MarkPostKnown(Post post) {
1973                         this.post = post;
1974                 }
1975
1976                 @Override
1977                 public void run() {
1978                         markPostKnown(post);
1979                 }
1980
1981         }
1982
1983         @VisibleForTesting
1984         class MarkReplyKnown implements Runnable {
1985
1986                 private final PostReply postReply;
1987
1988                 public MarkReplyKnown(PostReply postReply) {
1989                         this.postReply = postReply;
1990                 }
1991
1992                 @Override
1993                 public void run() {
1994                         markReplyKnown(postReply);
1995                 }
1996
1997         }
1998
1999 }