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