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.Preconditions.checkArgument;
  21 import static com.google.common.base.Preconditions.checkNotNull;
  22
  23 import java.net.MalformedURLException;
  24 import java.util.ArrayList;
  25 import java.util.Collection;
  26 import java.util.HashMap;
  27 import java.util.HashSet;
  28 import java.util.List;
  29 import java.util.Map;
  30 import java.util.Map.Entry;
  31 import java.util.Set;
  32 import java.util.concurrent.ExecutorService;
  33 import java.util.concurrent.Executors;
  34 import java.util.concurrent.ScheduledExecutorService;
  35 import java.util.concurrent.TimeUnit;
  36 import java.util.logging.Level;
  37 import java.util.logging.Logger;
  38
  39 import net.pterodactylus.sone.core.Options.DefaultOption;
  40 import net.pterodactylus.sone.core.Options.Option;
  41 import net.pterodactylus.sone.core.Options.OptionWatcher;
  42 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  43 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  44 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  45 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  46 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  47 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  48 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  49 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  50 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  51 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  52 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  53 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  54 import net.pterodactylus.sone.data.Album;
  55 import net.pterodactylus.sone.data.Client;
  56 import net.pterodactylus.sone.data.Image;
  57 import net.pterodactylus.sone.data.Post;
  58 import net.pterodactylus.sone.data.PostReply;
  59 import net.pterodactylus.sone.data.Profile;
  60 import net.pterodactylus.sone.data.Profile.Field;
  61 import net.pterodactylus.sone.data.Reply;
  62 import net.pterodactylus.sone.data.Sone;
  63 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
  64 import net.pterodactylus.sone.data.Sone.SoneStatus;
  65 import net.pterodactylus.sone.data.SoneImpl;
  66 import net.pterodactylus.sone.data.TemporaryImage;
  67 import net.pterodactylus.sone.database.Database;
  68 import net.pterodactylus.sone.database.DatabaseException;
  69 import net.pterodactylus.sone.database.PostBuilder;
  70 import net.pterodactylus.sone.database.PostProvider;
  71 import net.pterodactylus.sone.database.PostReplyBuilder;
  72 import net.pterodactylus.sone.database.PostReplyProvider;
  73 import net.pterodactylus.sone.database.SoneProvider;
  74 import net.pterodactylus.sone.fcp.FcpInterface;
  75 import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
  76 import net.pterodactylus.sone.freenet.wot.Identity;
  77 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  78 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  83 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  84 import net.pterodactylus.sone.main.SonePlugin;
  85 import net.pterodactylus.sone.utils.IntegerRangePredicate;
  86 import net.pterodactylus.util.config.Configuration;
  87 import net.pterodactylus.util.config.ConfigurationException;
  88 import net.pterodactylus.util.logging.Logging;
  89 import net.pterodactylus.util.number.Numbers;
  90 import net.pterodactylus.util.service.AbstractService;
  91 import net.pterodactylus.util.thread.NamedThreadFactory;
  92
  93 import com.google.common.base.Optional;
  94 import com.google.common.base.Predicate;
  95 import com.google.common.base.Predicates;
  96 import com.google.common.collect.FluentIterable;
  97 import com.google.common.collect.HashMultimap;
  98 import com.google.common.collect.ImmutableSet;
  99 import com.google.common.collect.Multimap;
 100 import com.google.common.collect.Multimaps;
 101 import com.google.common.eventbus.EventBus;
 102 import com.google.common.eventbus.Subscribe;
 103 import com.google.inject.Inject;
 104
 105 import freenet.keys.FreenetURI;
 106
 107 /**
 108  * The Sone core.
 109  *
 110  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 111  */
 112 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 113
 114         /** The logger. */
 115         private static final Logger logger = Logging.getLogger(Core.class);
 116
 117         /** The start time. */
 118         private final long startupTime = System.currentTimeMillis();
 119
 120         /** The options. */
 121         private final Options options = new Options();
 122
 123         /** The preferences. */
 124         private final Preferences preferences = new Preferences(options);
 125
 126         /** The event bus. */
 127         private final EventBus eventBus;
 128
 129         /** The configuration. */
 130         private Configuration configuration;
 131
 132         /** Whether we’re currently saving the configuration. */
 133         private boolean storingConfiguration = false;
 134
 135         /** The identity manager. */
 136         private final IdentityManager identityManager;
 137
 138         /** Interface to freenet. */
 139         private final FreenetInterface freenetInterface;
 140
 141         /** The Sone downloader. */
 142         private final SoneDownloader soneDownloader;
 143
 144         /** The image inserter. */
 145         private final ImageInserter imageInserter;
 146
 147         /** Sone downloader thread-pool. */
 148         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 149
 150         /** The update checker. */
 151         private final UpdateChecker updateChecker;
 152
 153         /** The trust updater. */
 154         private final WebOfTrustUpdater webOfTrustUpdater;
 155
 156         /** The FCP interface. */
 157         private volatile FcpInterface fcpInterface;
 158
 159         /** The times Sones were followed. */
 160         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 161
 162         /** Locked local Sones. */
 163         /* synchronize on itself. */
 164         private final Set<Sone> lockedSones = new HashSet<Sone>();
 165
 166         /** Sone inserters. */
 167         /* synchronize access on this on sones. */
 168         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 169
 170         /** Sone rescuers. */
 171         /* synchronize access on this on sones. */
 172         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 173
 174         /** All Sones. */
 175         /* synchronize access on this on itself. */
 176         private final Map<String, Sone> sones = new HashMap<String, Sone>();
 177
 178         /** All known Sones. */
 179         private final Set<String> knownSones = new HashSet<String>();
 180
 181         /** The post database. */
 182         private final Database database;
 183
 184         /** All bookmarked posts. */
 185         /* synchronize access on itself. */
 186         private final Set<String> bookmarkedPosts = new HashSet<String>();
 187
 188         /** Trusted identities, sorted by own identities. */
 189         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 190
 191         /** All temporary images. */
 192         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 193
 194         /** Ticker for threads that mark own elements as known. */
 195         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 196
 197         /** The time the configuration was last touched. */
 198         private volatile long lastConfigurationUpdate;
 199
 200         /**
 201          * Creates a new core.
 202          *
 203          * @param configuration
 204          *            The configuration of the core
 205          * @param freenetInterface
 206          *            The freenet interface
 207          * @param identityManager
 208          *            The identity manager
 209          * @param webOfTrustUpdater
 210          *            The WebOfTrust updater
 211          * @param eventBus
 212          *            The event bus
 213          * @param database
 214          *            The database
 215          */
 216         @Inject
 217         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 218                 super("Sone Core");
 219                 this.configuration = configuration;
 220                 this.freenetInterface = freenetInterface;
 221                 this.identityManager = identityManager;
 222                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 223                 this.imageInserter = new ImageInserter(freenetInterface);
 224                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 225                 this.webOfTrustUpdater = webOfTrustUpdater;
 226                 this.eventBus = eventBus;
 227                 this.database = database;
 228         }
 229
 230         //
 231         // ACCESSORS
 232         //
 233
 234         /**
 235          * Returns the time Sone was started.
 236          *
 237          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 238          */
 239         public long getStartupTime() {
 240                 return startupTime;
 241         }
 242
 243         /**
 244          * Sets the configuration to use. This will automatically save the current
 245          * configuration to the given configuration.
 246          *
 247          * @param configuration
 248          *            The new configuration to use
 249          */
 250         public void setConfiguration(Configuration configuration) {
 251                 this.configuration = configuration;
 252                 touchConfiguration();
 253         }
 254
 255         /**
 256          * Returns the options used by the core.
 257          *
 258          * @return The options of the core
 259          */
 260         public Preferences getPreferences() {
 261                 return preferences;
 262         }
 263
 264         /**
 265          * Returns the identity manager used by the core.
 266          *
 267          * @return The identity manager
 268          */
 269         public IdentityManager getIdentityManager() {
 270                 return identityManager;
 271         }
 272
 273         /**
 274          * Returns the update checker.
 275          *
 276          * @return The update checker
 277          */
 278         public UpdateChecker getUpdateChecker() {
 279                 return updateChecker;
 280         }
 281
 282         /**
 283          * Sets the FCP interface to use.
 284          *
 285          * @param fcpInterface
 286          *            The FCP interface to use
 287          */
 288         public void setFcpInterface(FcpInterface fcpInterface) {
 289                 this.fcpInterface = fcpInterface;
 290         }
 291
 292         /**
 293          * Returns the Sone rescuer for the given local Sone.
 294          *
 295          * @param sone
 296          *            The local Sone to get the rescuer for
 297          * @return The Sone rescuer for the given Sone
 298          */
 299         public SoneRescuer getSoneRescuer(Sone sone) {
 300                 checkNotNull(sone, "sone must not be null");
 301                 checkArgument(sone.isLocal(), "sone must be local");
 302                 synchronized (sones) {
 303                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 304                         if (soneRescuer == null) {
 305                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 306                                 soneRescuers.put(sone, soneRescuer);
 307                                 soneRescuer.start();
 308                         }
 309                         return soneRescuer;
 310                 }
 311         }
 312
 313         /**
 314          * Returns whether the given Sone is currently locked.
 315          *
 316          * @param sone
 317          *            The sone to check
 318          * @return {@code true} if the Sone is locked, {@code false} if it is not
 319          */
 320         public boolean isLocked(Sone sone) {
 321                 synchronized (lockedSones) {
 322                         return lockedSones.contains(sone);
 323                 }
 324         }
 325
 326         /**
 327          * {@inheritDocs}
 328          */
 329         @Override
 330         public Collection<Sone> getSones() {
 331                 synchronized (sones) {
 332                         return ImmutableSet.copyOf(sones.values());
 333                 }
 334         }
 335
 336         /**
 337          * Returns the Sone with the given ID, regardless whether it’s local or
 338          * remote.
 339          *
 340          * @param id
 341          *            The ID of the Sone to get
 342          * @return The Sone with the given ID, or {@code null} if there is no such
 343          *         Sone
 344          */
 345         @Override
 346         public Optional<Sone> getSone(String id) {
 347                 synchronized (sones) {
 348                         return Optional.fromNullable(sones.get(id));
 349                 }
 350         }
 351
 352         /**
 353          * {@inheritDocs}
 354          */
 355         @Override
 356         public Collection<Sone> getLocalSones() {
 357                 synchronized (sones) {
 358                         return FluentIterable.from(sones.values()).filter(new Predicate<Sone>() {
 359
 360                                 @Override
 361                                 public boolean apply(Sone sone) {
 362                                         return sone.isLocal();
 363                                 }
 364                         }).toSet();
 365                 }
 366         }
 367
 368         /**
 369          * Returns the local Sone with the given ID, optionally creating a new Sone.
 370          *
 371          * @param id
 372          *            The ID of the Sone
 373          * @param create
 374          *            {@code true} to create a new Sone if none exists,
 375          *            {@code false} to return null if none exists
 376          * @return The Sone with the given ID, or {@code null}
 377          */
 378         public Sone getLocalSone(String id, boolean create) {
 379                 synchronized (sones) {
 380                         Sone sone = sones.get(id);
 381                         if ((sone == null) && create) {
 382                                 sone = new SoneImpl(id, true);
 383                                 sones.put(id, sone);
 384                         }
 385                         if ((sone != null) && !sone.isLocal()) {
 386                                 sone = new SoneImpl(id, true);
 387                                 sones.put(id, sone);
 388                         }
 389                         return sone;
 390                 }
 391         }
 392
 393         /**
 394          * {@inheritDocs}
 395          */
 396         @Override
 397         public Collection<Sone> getRemoteSones() {
 398                 synchronized (sones) {
 399                         return FluentIterable.from(sones.values()).filter(new Predicate<Sone>() {
 400
 401                                 @Override
 402                                 public boolean apply(Sone sone) {
 403                                         return !sone.isLocal();
 404                                 }
 405                         }).toSet();
 406                 }
 407         }
 408
 409         /**
 410          * Returns the remote Sone with the given ID.
 411          *
 412          * @param id
 413          *            The ID of the remote Sone to get
 414          * @param create
 415          *            {@code true} to always create a Sone, {@code false} to return
 416          *            {@code null} if no Sone with the given ID exists
 417          * @return The Sone with the given ID
 418          */
 419         public Sone getRemoteSone(String id, boolean create) {
 420                 synchronized (sones) {
 421                         Sone sone = sones.get(id);
 422                         if ((sone == null) && create && (id != null) && (id.length() == 43)) {
 423                                 sone = new SoneImpl(id, false);
 424                                 sones.put(id, sone);
 425                         }
 426                         return sone;
 427                 }
 428         }
 429
 430         /**
 431          * Returns whether the given Sone has been modified.
 432          *
 433          * @param sone
 434          *            The Sone to check for modifications
 435          * @return {@code true} if a modification has been detected in the Sone,
 436          *         {@code false} otherwise
 437          */
 438         public boolean isModifiedSone(Sone sone) {
 439                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 440         }
 441
 442         /**
 443          * Returns the time when the given was first followed by any local Sone.
 444          *
 445          * @param sone
 446          *            The Sone to get the time for
 447          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 448          *         been followed, or {@link Long#MAX_VALUE}
 449          */
 450         public long getSoneFollowingTime(Sone sone) {
 451                 synchronized (soneFollowingTimes) {
 452                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 453                 }
 454         }
 455
 456         /**
 457          * Returns whether the target Sone is trusted by the origin Sone.
 458          *
 459          * @param origin
 460          *            The origin Sone
 461          * @param target
 462          *            The target Sone
 463          * @return {@code true} if the target Sone is trusted by the origin Sone
 464          */
 465         public boolean isSoneTrusted(Sone origin, Sone target) {
 466                 checkNotNull(origin, "origin must not be null");
 467                 checkNotNull(target, "target must not be null");
 468                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin’s identity must be an OwnIdentity");
 469                 return trustedIdentities.containsEntry(origin.getIdentity(), target.getIdentity());
 470         }
 471
 472         /**
 473          * Returns a post builder.
 474          *
 475          * @return A new post builder
 476          */
 477         public PostBuilder postBuilder() {
 478                 return database.newPostBuilder();
 479         }
 480
 481         /**
 482          * {@inheritDoc}
 483          */
 484         @Override
 485         public Optional<Post> getPost(String postId) {
 486                 return database.getPost(postId);
 487         }
 488
 489         /**
 490          * {@inheritDocs}
 491          */
 492         @Override
 493         public Collection<Post> getPosts(String soneId) {
 494                 return database.getPosts(soneId);
 495         }
 496
 497         /**
 498          * {@inheritDoc}
 499          */
 500         @Override
 501         public Collection<Post> getDirectedPosts(final String recipientId) {
 502                 checkNotNull(recipientId, "recipient must not be null");
 503                 return database.getDirectedPosts(recipientId);
 504         }
 505
 506         /**
 507          * Returns a post reply builder.
 508          *
 509          * @return A new post reply builder
 510          */
 511         public PostReplyBuilder postReplyBuilder() {
 512                 return database.newPostReplyBuilder();
 513         }
 514
 515         /**
 516          * {@inheritDoc}
 517          */
 518         @Override
 519         public Optional<PostReply> getPostReply(String replyId) {
 520                 return database.getPostReply(replyId);
 521         }
 522
 523         /**
 524          * {@inheritDoc}
 525          */
 526         @Override
 527         public List<PostReply> getReplies(final String postId) {
 528                 return database.getReplies(postId);
 529         }
 530
 531         /**
 532          * Returns all Sones that have liked the given post.
 533          *
 534          * @param post
 535          *            The post to get the liking Sones for
 536          * @return The Sones that like the given post
 537          */
 538         public Set<Sone> getLikes(Post post) {
 539                 Set<Sone> sones = new HashSet<Sone>();
 540                 for (Sone sone : getSones()) {
 541                         if (sone.getLikedPostIds().contains(post.getId())) {
 542                                 sones.add(sone);
 543                         }
 544                 }
 545                 return sones;
 546         }
 547
 548         /**
 549          * Returns all Sones that have liked the given reply.
 550          *
 551          * @param reply
 552          *            The reply to get the liking Sones for
 553          * @return The Sones that like the given reply
 554          */
 555         public Set<Sone> getLikes(PostReply reply) {
 556                 Set<Sone> sones = new HashSet<Sone>();
 557                 for (Sone sone : getSones()) {
 558                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 559                                 sones.add(sone);
 560                         }
 561                 }
 562                 return sones;
 563         }
 564
 565         /**
 566          * Returns whether the given post is bookmarked.
 567          *
 568          * @param post
 569          *            The post to check
 570          * @return {@code true} if the given post is bookmarked, {@code false}
 571          *         otherwise
 572          */
 573         public boolean isBookmarked(Post post) {
 574                 return isPostBookmarked(post.getId());
 575         }
 576
 577         /**
 578          * Returns whether the post with the given ID is bookmarked.
 579          *
 580          * @param id
 581          *            The ID of the post to check
 582          * @return {@code true} if the post with the given ID is bookmarked,
 583          *         {@code false} otherwise
 584          */
 585         public boolean isPostBookmarked(String id) {
 586                 synchronized (bookmarkedPosts) {
 587                         return bookmarkedPosts.contains(id);
 588                 }
 589         }
 590
 591         /**
 592          * Returns all currently known bookmarked posts.
 593          *
 594          * @return All bookmarked posts
 595          */
 596         public Set<Post> getBookmarkedPosts() {
 597                 Set<Post> posts = new HashSet<Post>();
 598                 synchronized (bookmarkedPosts) {
 599                         for (String bookmarkedPostId : bookmarkedPosts) {
 600                                 Optional<Post> post = getPost(bookmarkedPostId);
 601                                 if (post.isPresent()) {
 602                                         posts.add(post.get());
 603                                 }
 604                         }
 605                 }
 606                 return posts;
 607         }
 608
 609         /**
 610          * Returns the album with the given ID, creating a new album if no album
 611          * with the given ID can be found.
 612          *
 613          * @param albumId
 614          *            The ID of the album
 615          * @return The album with the given ID
 616          */
 617         public Album getAlbum(String albumId) {
 618                 return getAlbum(albumId, true);
 619         }
 620
 621         /**
 622          * Returns the album with the given ID, optionally creating a new album if
 623          * an album with the given ID can not be found.
 624          *
 625          * @param albumId
 626          *            The ID of the album
 627          * @param create
 628          *            {@code true} to create a new album if none exists for the
 629          *            given ID
 630          * @return The album with the given ID, or {@code null} if no album with the
 631          *         given ID exists and {@code create} is {@code false}
 632          */
 633         public Album getAlbum(String albumId, boolean create) {
 634                 Optional<Album> album = database.getAlbum(albumId);
 635                 if (album.isPresent()) {
 636                         return album.get();
 637                 }
 638                 if (!create) {
 639                         return null;
 640                 }
 641                 Album newAlbum = database.newAlbumBuilder().withId(albumId).build();
 642                 database.storeAlbum(newAlbum);
 643                 return newAlbum;
 644         }
 645
 646         public Optional<Image> getImage(String imageId) {
 647                 return database.getImage(imageId);
 648         }
 649
 650         /**
 651          * Returns the temporary image with the given ID.
 652          *
 653          * @param imageId
 654          *            The ID of the temporary image
 655          * @return The temporary image, or {@code null} if there is no temporary
 656          *         image with the given ID
 657          */
 658         public TemporaryImage getTemporaryImage(String imageId) {
 659                 synchronized (temporaryImages) {
 660                         return temporaryImages.get(imageId);
 661                 }
 662         }
 663
 664         //
 665         // ACTIONS
 666         //
 667
 668         /**
 669          * Locks the given Sone. A locked Sone will not be inserted by
 670          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 671          * again.
 672          *
 673          * @param sone
 674          *            The sone to lock
 675          */
 676         public void lockSone(Sone sone) {
 677                 synchronized (lockedSones) {
 678                         if (lockedSones.add(sone)) {
 679                                 eventBus.post(new SoneLockedEvent(sone));
 680                         }
 681                 }
 682         }
 683
 684         /**
 685          * Unlocks the given Sone.
 686          *
 687          * @see #lockSone(Sone)
 688          * @param sone
 689          *            The sone to unlock
 690          */
 691         public void unlockSone(Sone sone) {
 692                 synchronized (lockedSones) {
 693                         if (lockedSones.remove(sone)) {
 694                                 eventBus.post(new SoneUnlockedEvent(sone));
 695                         }
 696                 }
 697         }
 698
 699         /**
 700          * Adds a local Sone from the given own identity.
 701          *
 702          * @param ownIdentity
 703          *            The own identity to create a Sone from
 704          * @return The added (or already existing) Sone
 705          */
 706         public Sone addLocalSone(OwnIdentity ownIdentity) {
 707                 if (ownIdentity == null) {
 708                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 709                         return null;
 710                 }
 711                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 712                 synchronized (sones) {
 713                         final Sone sone;
 714                         try {
 715                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 716                         } catch (MalformedURLException mue1) {
 717                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 718                                 return null;
 719                         }
 720                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 721                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 722                         sone.setKnown(true);
 723                         /* TODO - load posts ’n stuff */
 724                         sones.put(ownIdentity.getId(), sone);
 725                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 726                         soneInserters.put(sone, soneInserter);
 727                         sone.setStatus(SoneStatus.idle);
 728                         loadSone(sone);
 729                         soneInserter.start();
 730                         return sone;
 731                 }
 732         }
 733
 734         /**
 735          * Creates a new Sone for the given own identity.
 736          *
 737          * @param ownIdentity
 738          *            The own identity to create a Sone for
 739          * @return The created Sone
 740          */
 741         public Sone createSone(OwnIdentity ownIdentity) {
 742                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 743                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 744                         return null;
 745                 }
 746                 Sone sone = addLocalSone(ownIdentity);
 747                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 748                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
 749                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
 750                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
 751                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
 752                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 753
 754                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 755                 touchConfiguration();
 756                 return sone;
 757         }
 758
 759         /**
 760          * Adds the Sone of the given identity.
 761          *
 762          * @param identity
 763          *            The identity whose Sone to add
 764          * @return The added or already existing Sone
 765          */
 766         public Sone addRemoteSone(Identity identity) {
 767                 if (identity == null) {
 768                         logger.log(Level.WARNING, "Given Identity is null!");
 769                         return null;
 770                 }
 771                 synchronized (sones) {
 772                         final Sone sone = getRemoteSone(identity.getId(), true);
 773                         if (sone.isLocal()) {
 774                                 return sone;
 775                         }
 776                         sone.setIdentity(identity);
 777                         boolean newSone = sone.getRequestUri() == null;
 778                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 779                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 780                         if (newSone) {
 781                                 synchronized (knownSones) {
 782                                         newSone = !knownSones.contains(sone.getId());
 783                                 }
 784                                 sone.setKnown(!newSone);
 785                                 if (newSone) {
 786                                         eventBus.post(new NewSoneFoundEvent(sone));
 787                                         for (Sone localSone : getLocalSones()) {
 788                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
 789                                                         followSone(localSone, sone.getId());
 790                                                 }
 791                                         }
 792                                 }
 793                         }
 794                         soneDownloader.addSone(sone);
 795                         soneDownloaders.execute(new Runnable() {
 796
 797                                 @Override
 798                                 @SuppressWarnings("synthetic-access")
 799                                 public void run() {
 800                                         soneDownloader.fetchSone(sone, sone.getRequestUri());
 801                                 }
 802
 803                         });
 804                         return sone;
 805                 }
 806         }
 807
 808         /**
 809          * Lets the given local Sone follow the Sone with the given ID.
 810          *
 811          * @param sone
 812          *            The local Sone that should follow another Sone
 813          * @param soneId
 814          *            The ID of the Sone to follow
 815          */
 816         public void followSone(Sone sone, String soneId) {
 817                 checkNotNull(sone, "sone must not be null");
 818                 checkNotNull(soneId, "soneId must not be null");
 819                 sone.addFriend(soneId);
 820                 synchronized (soneFollowingTimes) {
 821                         if (!soneFollowingTimes.containsKey(soneId)) {
 822                                 long now = System.currentTimeMillis();
 823                                 soneFollowingTimes.put(soneId, now);
 824                                 Optional<Sone> followedSone = getSone(soneId);
 825                                 if (!followedSone.isPresent()) {
 826                                         return;
 827                                 }
 828                                 for (Post post : followedSone.get().getPosts()) {
 829                                         if (post.getTime() < now) {
 830                                                 markPostKnown(post);
 831                                         }
 832                                 }
 833                                 for (PostReply reply : followedSone.get().getReplies()) {
 834                                         if (reply.getTime() < now) {
 835                                                 markReplyKnown(reply);
 836                                         }
 837                                 }
 838                         }
 839                 }
 840                 touchConfiguration();
 841         }
 842
 843         /**
 844          * Lets the given local Sone unfollow the Sone with the given ID.
 845          *
 846          * @param sone
 847          *            The local Sone that should unfollow another Sone
 848          * @param soneId
 849          *            The ID of the Sone being unfollowed
 850          */
 851         public void unfollowSone(Sone sone, String soneId) {
 852                 checkNotNull(sone, "sone must not be null");
 853                 checkNotNull(soneId, "soneId must not be null");
 854                 sone.removeFriend(soneId);
 855                 boolean unfollowedSoneStillFollowed = false;
 856                 for (Sone localSone : getLocalSones()) {
 857                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 858                 }
 859                 if (!unfollowedSoneStillFollowed) {
 860                         synchronized (soneFollowingTimes) {
 861                                 soneFollowingTimes.remove(soneId);
 862                         }
 863                 }
 864                 touchConfiguration();
 865         }
 866
 867         /**
 868          * Sets the trust value of the given origin Sone for the target Sone.
 869          *
 870          * @param origin
 871          *            The origin Sone
 872          * @param target
 873          *            The target Sone
 874          * @param trustValue
 875          *            The trust value (from {@code -100} to {@code 100})
 876          */
 877         public void setTrust(Sone origin, Sone target, int trustValue) {
 878                 checkNotNull(origin, "origin must not be null");
 879                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 880                 checkNotNull(target, "target must not be null");
 881                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 882                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 883         }
 884
 885         /**
 886          * Removes any trust assignment for the given target Sone.
 887          *
 888          * @param origin
 889          *            The trust origin
 890          * @param target
 891          *            The trust target
 892          */
 893         public void removeTrust(Sone origin, Sone target) {
 894                 checkNotNull(origin, "origin must not be null");
 895                 checkNotNull(target, "target must not be null");
 896                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 897                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 898         }
 899
 900         /**
 901          * Assigns the configured positive trust value for the given target.
 902          *
 903          * @param origin
 904          *            The trust origin
 905          * @param target
 906          *            The trust target
 907          */
 908         public void trustSone(Sone origin, Sone target) {
 909                 setTrust(origin, target, preferences.getPositiveTrust());
 910         }
 911
 912         /**
 913          * Assigns the configured negative trust value for the given target.
 914          *
 915          * @param origin
 916          *            The trust origin
 917          * @param target
 918          *            The trust target
 919          */
 920         public void distrustSone(Sone origin, Sone target) {
 921                 setTrust(origin, target, preferences.getNegativeTrust());
 922         }
 923
 924         /**
 925          * Removes the trust assignment for the given target.
 926          *
 927          * @param origin
 928          *            The trust origin
 929          * @param target
 930          *            The trust target
 931          */
 932         public void untrustSone(Sone origin, Sone target) {
 933                 removeTrust(origin, target);
 934         }
 935
 936         /**
 937          * Updates the stored Sone with the given Sone.
 938          *
 939          * @param sone
 940          *            The updated Sone
 941          */
 942         public void updateSone(Sone sone) {
 943                 updateSone(sone, false);
 944         }
 945
 946         /**
 947          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 948          * {@code true}, an older Sone than the current Sone can be given to restore
 949          * an old state.
 950          *
 951          * @param sone
 952          *            The Sone to update
 953          * @param soneRescueMode
 954          *            {@code true} if the stored Sone should be updated regardless
 955          *            of the age of the given Sone
 956          */
 957         public void updateSone(Sone sone, boolean soneRescueMode) {
 958                 Optional<Sone> storedSone = getSone(sone.getId());
 959                 if (storedSone.isPresent()) {
 960                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 961                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 962                                 return;
 963                         }
 964                         /* find removed posts. */
 965                         Collection<Post> existingPosts = database.getPosts(sone.getId());
 966                         for (Post oldPost : existingPosts) {
 967                                 if (!sone.getPosts().contains(oldPost)) {
 968                                         eventBus.post(new PostRemovedEvent(oldPost));
 969                                 }
 970                         }
 971                         /* find new posts. */
 972                         for (Post newPost : sone.getPosts()) {
 973                                 if (existingPosts.contains(newPost)) {
 974                                         continue;
 975                                 }
 976                                 if (newPost.getTime() < getSoneFollowingTime(sone)) {
 977                                         newPost.setKnown(true);
 978                                 } else if (!newPost.isKnown()) {
 979                                         eventBus.post(new NewPostFoundEvent(newPost));
 980                                 }
 981                         }
 982                         /* store posts. */
 983                         database.storePosts(sone, sone.getPosts());
 984                         if (!soneRescueMode) {
 985                                 for (PostReply reply : storedSone.get().getReplies()) {
 986                                         if (!sone.getReplies().contains(reply)) {
 987                                                 eventBus.post(new PostReplyRemovedEvent(reply));
 988                                         }
 989                                 }
 990                         }
 991                         Set<PostReply> storedReplies = storedSone.get().getReplies();
 992                         for (PostReply reply : sone.getReplies()) {
 993                                 if (storedReplies.contains(reply)) {
 994                                         continue;
 995                                 }
 996                                 if (reply.getTime() < getSoneFollowingTime(sone)) {
 997                                         reply.setKnown(true);
 998                                 } else if (!reply.isKnown()) {
 999                                         eventBus.post(new NewPostReplyFoundEvent(reply));
1000                                 }
1001                         }
1002                         database.storePostReplies(sone, sone.getReplies());
1003                         for (Album album : storedSone.get().getRootAlbum().getAlbums()) {
1004                                 database.removeAlbum(album);
1005                                 for (Image image : album.getImages()) {
1006                                         database.removeImage(image);
1007                                 }
1008                         }
1009                         for (Album album : sone.getRootAlbum().getAlbums()) {
1010                                 database.storeAlbum(album);
1011                                 for (Image image : album.getImages()) {
1012                                         database.storeImage(image);
1013                                 }
1014                         }
1015                         synchronized (sones) {
1016                                 sone.setOptions(storedSone.get().getOptions());
1017                                 sone.setKnown(storedSone.get().isKnown());
1018                                 sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
1019                                 if (sone.isLocal()) {
1020                                         soneInserters.get(storedSone.get()).setSone(sone);
1021                                         touchConfiguration();
1022                                 }
1023                                 sones.put(sone.getId(), sone);
1024                         }
1025                 }
1026         }
1027
1028         /**
1029          * Deletes the given Sone. This will remove the Sone from the
1030          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1031          * remove the context from its identity.
1032          *
1033          * @param sone
1034          *            The Sone to delete
1035          */
1036         public void deleteSone(Sone sone) {
1037                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1038                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1039                         return;
1040                 }
1041                 synchronized (sones) {
1042                         if (!getLocalSones().contains(sone)) {
1043                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1044                                 return;
1045                         }
1046                         sones.remove(sone.getId());
1047                         SoneInserter soneInserter = soneInserters.remove(sone);
1048                         soneInserter.stop();
1049                 }
1050                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1051                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1052                 try {
1053                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1054                 } catch (ConfigurationException ce1) {
1055                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1056                 }
1057         }
1058
1059         /**
1060          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1061          * known} before, a {@link MarkSoneKnownEvent} is fired.
1062          *
1063          * @param sone
1064          *            The Sone to mark as known
1065          */
1066         public void markSoneKnown(Sone sone) {
1067                 if (!sone.isKnown()) {
1068                         sone.setKnown(true);
1069                         synchronized (knownSones) {
1070                                 knownSones.add(sone.getId());
1071                         }
1072                         eventBus.post(new MarkSoneKnownEvent(sone));
1073                         touchConfiguration();
1074                 }
1075         }
1076
1077         /**
1078          * Loads and updates the given Sone from the configuration. If any error is
1079          * encountered, loading is aborted and the given Sone is not changed.
1080          *
1081          * @param sone
1082          *            The Sone to load and update
1083          */
1084         public void loadSone(Sone sone) {
1085                 if (!sone.isLocal()) {
1086                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1087                         return;
1088                 }
1089                 logger.info(String.format("Loading local Sone: %s", sone));
1090
1091                 /* initialize options. */
1092                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1093                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
1094                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
1095                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
1096                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
1097                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
1098
1099                 /* load Sone. */
1100                 String sonePrefix = "Sone/" + sone.getId();
1101                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1102                 if (soneTime == null) {
1103                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1104                         return;
1105                 }
1106                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1107
1108                 /* load profile. */
1109                 Profile profile = new Profile(sone);
1110                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1111                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1112                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1113                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1114                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1115                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1116
1117                 /* load profile fields. */
1118                 while (true) {
1119                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1120                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1121                         if (fieldName == null) {
1122                                 break;
1123                         }
1124                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1125                         profile.addField(fieldName).setValue(fieldValue);
1126                 }
1127
1128                 /* load posts. */
1129                 Set<Post> posts = new HashSet<Post>();
1130                 while (true) {
1131                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1132                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1133                         if (postId == null) {
1134                                 break;
1135                         }
1136                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1137                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1138                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1139                         if ((postTime == 0) || (postText == null)) {
1140                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1141                                 return;
1142                         }
1143                         PostBuilder postBuilder = postBuilder().withId(postId).from(sone.getId()).withTime(postTime).withText(postText);
1144                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1145                                 postBuilder.to(postRecipientId);
1146                         }
1147                         posts.add(postBuilder.build());
1148                 }
1149
1150                 /* load replies. */
1151                 Set<PostReply> replies = new HashSet<PostReply>();
1152                 while (true) {
1153                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1154                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1155                         if (replyId == null) {
1156                                 break;
1157                         }
1158                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1159                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1160                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1161                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1162                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1163                                 return;
1164                         }
1165                         PostReplyBuilder postReplyBuilder = postReplyBuilder().withId(replyId).from(sone.getId()).to(postId).withTime(replyTime).withText(replyText);
1166                         replies.add(postReplyBuilder.build());
1167                 }
1168
1169                 /* load post likes. */
1170                 Set<String> likedPostIds = new HashSet<String>();
1171                 while (true) {
1172                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1173                         if (likedPostId == null) {
1174                                 break;
1175                         }
1176                         likedPostIds.add(likedPostId);
1177                 }
1178
1179                 /* load reply likes. */
1180                 Set<String> likedReplyIds = new HashSet<String>();
1181                 while (true) {
1182                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1183                         if (likedReplyId == null) {
1184                                 break;
1185                         }
1186                         likedReplyIds.add(likedReplyId);
1187                 }
1188
1189                 /* load friends. */
1190                 Set<String> friends = new HashSet<String>();
1191                 while (true) {
1192                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1193                         if (friendId == null) {
1194                                 break;
1195                         }
1196                         friends.add(friendId);
1197                 }
1198
1199                 /* load albums. */
1200                 List<Album> topLevelAlbums = new ArrayList<Album>();
1201                 int albumCounter = 0;
1202                 while (true) {
1203                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1204                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1205                         if (albumId == null) {
1206                                 break;
1207                         }
1208                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1209                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1210                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1211                         String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
1212                         if ((albumTitle == null) || (albumDescription == null)) {
1213                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1214                                 return;
1215                         }
1216                         Album album = getAlbum(albumId).setSone(sone).modify().setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId).update();
1217                         if (albumParentId != null) {
1218                                 Album parentAlbum = getAlbum(albumParentId, false);
1219                                 if (parentAlbum == null) {
1220                                         logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
1221                                         return;
1222                                 }
1223                                 parentAlbum.addAlbum(album);
1224                         } else {
1225                                 if (!topLevelAlbums.contains(album)) {
1226                                         topLevelAlbums.add(album);
1227                                 }
1228                         }
1229                 }
1230
1231                 /* load images. */
1232                 int imageCounter = 0;
1233                 while (true) {
1234                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1235                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1236                         if (imageId == null) {
1237                                 break;
1238                         }
1239                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1240                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1241                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1242                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1243                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1244                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1245                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1246                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1247                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1248                                 return;
1249                         }
1250                         Album album = getAlbum(albumId, false);
1251                         if (album == null) {
1252                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1253                                 return;
1254                         }
1255                         album.newImageBuilder().withId(imageId).by(sone).created(creationTime).at(key).sized(width, height).build().modify().setTitle(title).setDescription(description).update();
1256                 }
1257
1258                 /* load avatar. */
1259                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1260                 if (avatarId != null) {
1261                         profile.setAvatar(getImage(avatarId).orNull());
1262                 }
1263
1264                 /* load options. */
1265                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1266                 sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1267                 sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1268                 sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1269                 sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1270                 sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1271
1272                 /* if we’re still here, Sone was loaded successfully. */
1273                 synchronized (sone) {
1274                         sone.setTime(soneTime);
1275                         sone.setProfile(profile);
1276                         sone.setPosts(posts);
1277                         sone.setReplies(replies);
1278                         sone.setLikePostIds(likedPostIds);
1279                         sone.setLikeReplyIds(likedReplyIds);
1280                         for (String friendId : friends) {
1281                                 followSone(sone, friendId);
1282                         }
1283                         for (Album album : sone.getRootAlbum().getAlbums()) {
1284                                 sone.getRootAlbum().removeAlbum(album);
1285                         }
1286                         for (Album album : topLevelAlbums) {
1287                                 sone.getRootAlbum().addAlbum(album);
1288                         }
1289                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1290                 }
1291                 synchronized (knownSones) {
1292                         for (String friend : friends) {
1293                                 knownSones.add(friend);
1294                         }
1295                 }
1296                 database.storePosts(sone, posts);
1297                 for (Post post : posts) {
1298                         post.setKnown(true);
1299                 }
1300                 database.storePostReplies(sone, replies);
1301                 for (PostReply reply : replies) {
1302                         reply.setKnown(true);
1303                 }
1304
1305                 logger.info(String.format("Sone loaded successfully: %s", sone));
1306         }
1307
1308         /**
1309          * Creates a new post.
1310          *
1311          * @param sone
1312          *            The Sone that creates the post
1313          * @param text
1314          *            The text of the post
1315          * @return The created post
1316          */
1317         public Post createPost(Sone sone, String text) {
1318                 return createPost(sone, System.currentTimeMillis(), text);
1319         }
1320
1321         /**
1322          * Creates a new post.
1323          *
1324          * @param sone
1325          *            The Sone that creates the post
1326          * @param time
1327          *            The time of the post
1328          * @param text
1329          *            The text of the post
1330          * @return The created post
1331          */
1332         public Post createPost(Sone sone, long time, String text) {
1333                 return createPost(sone, null, time, text);
1334         }
1335
1336         /**
1337          * Creates a new post.
1338          *
1339          * @param sone
1340          *            The Sone that creates the post
1341          * @param recipient
1342          *            The recipient Sone, or {@code null} if this post does not have
1343          *            a recipient
1344          * @param text
1345          *            The text of the post
1346          * @return The created post
1347          */
1348         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
1349                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1350         }
1351
1352         /**
1353          * Creates a new post.
1354          *
1355          * @param sone
1356          *            The Sone that creates the post
1357          * @param recipient
1358          *            The recipient Sone, or {@code null} if this post does not have
1359          *            a recipient
1360          * @param time
1361          *            The time of the post
1362          * @param text
1363          *            The text of the post
1364          * @return The created post
1365          */
1366         public Post createPost(Sone sone, Optional<Sone> recipient, long time, String text) {
1367                 checkNotNull(text, "text must not be null");
1368                 checkArgument(text.trim().length() > 0, "text must not be empty");
1369                 if (!sone.isLocal()) {
1370                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1371                         return null;
1372                 }
1373                 PostBuilder postBuilder = database.newPostBuilder();
1374                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1375                 if (recipient.isPresent()) {
1376                         postBuilder.to(recipient.get().getId());
1377                 }
1378                 final Post post = postBuilder.build();
1379                 database.storePost(post);
1380                 eventBus.post(new NewPostFoundEvent(post));
1381                 sone.addPost(post);
1382                 touchConfiguration();
1383                 localElementTicker.schedule(new Runnable() {
1384
1385                         /**
1386                          * {@inheritDoc}
1387                          */
1388                         @Override
1389                         public void run() {
1390                                 markPostKnown(post);
1391                         }
1392                 }, 10, TimeUnit.SECONDS);
1393                 return post;
1394         }
1395
1396         /**
1397          * Deletes the given post.
1398          *
1399          * @param post
1400          *            The post to delete
1401          */
1402         public void deletePost(Post post) {
1403                 if (!post.getSone().isLocal()) {
1404                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1405                         return;
1406                 }
1407                 database.removePost(post);
1408                 eventBus.post(new PostRemovedEvent(post));
1409                 markPostKnown(post);
1410                 touchConfiguration();
1411         }
1412
1413         /**
1414          * Marks the given post as known, if it is currently not a known post
1415          * (according to {@link Post#isKnown()}).
1416          *
1417          * @param post
1418          *            The post to mark as known
1419          */
1420         public void markPostKnown(Post post) {
1421                 post.setKnown(true);
1422                 eventBus.post(new MarkPostKnownEvent(post));
1423                 touchConfiguration();
1424                 for (PostReply reply : getReplies(post.getId())) {
1425                         markReplyKnown(reply);
1426                 }
1427         }
1428
1429         /**
1430          * Bookmarks the given post.
1431          *
1432          * @param post
1433          *            The post to bookmark
1434          */
1435         public void bookmark(Post post) {
1436                 bookmarkPost(post.getId());
1437         }
1438
1439         /**
1440          * Bookmarks the post with the given ID.
1441          *
1442          * @param id
1443          *            The ID of the post to bookmark
1444          */
1445         public void bookmarkPost(String id) {
1446                 synchronized (bookmarkedPosts) {
1447                         bookmarkedPosts.add(id);
1448                 }
1449         }
1450
1451         /**
1452          * Removes the given post from the bookmarks.
1453          *
1454          * @param post
1455          *            The post to unbookmark
1456          */
1457         public void unbookmark(Post post) {
1458                 unbookmarkPost(post.getId());
1459         }
1460
1461         /**
1462          * Removes the post with the given ID from the bookmarks.
1463          *
1464          * @param id
1465          *            The ID of the post to unbookmark
1466          */
1467         public void unbookmarkPost(String id) {
1468                 synchronized (bookmarkedPosts) {
1469                         bookmarkedPosts.remove(id);
1470                 }
1471         }
1472
1473         /**
1474          * Creates a new reply.
1475          *
1476          * @param sone
1477          *            The Sone that creates the reply
1478          * @param post
1479          *            The post that this reply refers to
1480          * @param text
1481          *            The text of the reply
1482          * @return The created reply
1483          */
1484         public PostReply createReply(Sone sone, Post post, String text) {
1485                 checkNotNull(text, "text must not be null");
1486                 checkArgument(text.trim().length() > 0, "text must not be empty");
1487                 if (!sone.isLocal()) {
1488                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1489                         return null;
1490                 }
1491                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1492                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1493                 final PostReply reply = postReplyBuilder.build();
1494                 database.storePostReply(reply);
1495                 eventBus.post(new NewPostReplyFoundEvent(reply));
1496                 sone.addReply(reply);
1497                 touchConfiguration();
1498                 localElementTicker.schedule(new Runnable() {
1499
1500                         /**
1501                          * {@inheritDoc}
1502                          */
1503                         @Override
1504                         public void run() {
1505                                 markReplyKnown(reply);
1506                         }
1507                 }, 10, TimeUnit.SECONDS);
1508                 return reply;
1509         }
1510
1511         /**
1512          * Deletes the given reply.
1513          *
1514          * @param reply
1515          *            The reply to delete
1516          */
1517         public void deleteReply(PostReply reply) {
1518                 Sone sone = reply.getSone();
1519                 if (!sone.isLocal()) {
1520                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1521                         return;
1522                 }
1523                 database.removePostReply(reply);
1524                 markReplyKnown(reply);
1525                 sone.removeReply(reply);
1526                 touchConfiguration();
1527         }
1528
1529         /**
1530          * Marks the given reply as known, if it is currently not a known reply
1531          * (according to {@link Reply#isKnown()}).
1532          *
1533          * @param reply
1534          *            The reply to mark as known
1535          */
1536         public void markReplyKnown(PostReply reply) {
1537                 boolean previouslyKnown = reply.isKnown();
1538                 reply.setKnown(true);
1539                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1540                 if (!previouslyKnown) {
1541                         touchConfiguration();
1542                 }
1543         }
1544
1545         /**
1546          * Creates a new top-level album for the given Sone.
1547          *
1548          * @param sone
1549          *            The Sone to create the album for
1550          * @return The new album
1551          */
1552         public Album createAlbum(Sone sone) {
1553                 return createAlbum(sone, sone.getRootAlbum());
1554         }
1555
1556         /**
1557          * Creates a new album for the given Sone.
1558          *
1559          * @param sone
1560          *            The Sone to create the album for
1561          * @param parent
1562          *            The parent of the album (may be {@code null} to create a
1563          *            top-level album)
1564          * @return The new album
1565          */
1566         public Album createAlbum(Sone sone, Album parent) {
1567                 Album album = database.newAlbumBuilder().randomId().build();
1568                 database.storeAlbum(album);
1569                 album.setSone(sone);
1570                 parent.addAlbum(album);
1571                 return album;
1572         }
1573
1574         /**
1575          * Deletes the given album. The owner of the album has to be a local Sone,
1576          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1577          *
1578          * @param album
1579          *            The album to remove
1580          */
1581         public void deleteAlbum(Album album) {
1582                 checkNotNull(album, "album must not be null");
1583                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1584                 if (!album.isEmpty()) {
1585                         return;
1586                 }
1587                 album.getParent().removeAlbum(album);
1588                 database.removeAlbum(album);
1589                 touchConfiguration();
1590         }
1591
1592         /**
1593          * Creates a new image.
1594          *
1595          * @param sone
1596          *            The Sone creating the image
1597          * @param album
1598          *            The album the image will be inserted into
1599          * @param temporaryImage
1600          *            The temporary image to create the image from
1601          * @return The newly created image
1602          */
1603         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1604                 checkNotNull(sone, "sone must not be null");
1605                 checkNotNull(album, "album must not be null");
1606                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1607                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1608                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1609                 Image image = album.newImageBuilder().withId(temporaryImage.getId()).by(sone).createdNow().sized(temporaryImage.getWidth(), temporaryImage.getHeight()).build();
1610                 database.storeImage(image);
1611                 imageInserter.insertImage(temporaryImage, image);
1612                 return image;
1613         }
1614
1615         /**
1616          * Deletes the given image. This method will also delete a matching
1617          * temporary image.
1618          *
1619          * @see #deleteTemporaryImage(TemporaryImage)
1620          * @param image
1621          *            The image to delete
1622          */
1623         public void deleteImage(Image image) {
1624                 checkNotNull(image, "image must not be null");
1625                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1626                 deleteTemporaryImage(image.getId());
1627                 image.getAlbum().removeImage(image);
1628                 database.removeImage(image);
1629                 touchConfiguration();
1630         }
1631
1632         /**
1633          * Creates a new temporary image.
1634          *
1635          * @param mimeType
1636          *            The MIME type of the temporary image
1637          * @param imageData
1638          *            The encoded data of the image
1639          * @return The temporary image
1640          */
1641         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData, int width, int height) {
1642                 TemporaryImage temporaryImage = new TemporaryImage(mimeType, imageData, width, height);
1643                 synchronized (temporaryImages) {
1644                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1645                 }
1646                 return temporaryImage;
1647         }
1648
1649         /**
1650          * Deletes the given temporary image.
1651          *
1652          * @param temporaryImage
1653          *            The temporary image to delete
1654          */
1655         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1656                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1657                 deleteTemporaryImage(temporaryImage.getId());
1658         }
1659
1660         /**
1661          * Deletes the temporary image with the given ID.
1662          *
1663          * @param imageId
1664          *            The ID of the temporary image to delete
1665          */
1666         public void deleteTemporaryImage(String imageId) {
1667                 checkNotNull(imageId, "imageId must not be null");
1668                 synchronized (temporaryImages) {
1669                         temporaryImages.remove(imageId);
1670                 }
1671                 Optional<Image> image = getImage(imageId);
1672                 if (image.isPresent()) {
1673                         imageInserter.cancelImageInsert(image.get());
1674                 }
1675         }
1676
1677         /**
1678          * Notifies the core that the configuration, either of the core or of a
1679          * single local Sone, has changed, and that the configuration should be
1680          * saved.
1681          */
1682         public void touchConfiguration() {
1683                 lastConfigurationUpdate = System.currentTimeMillis();
1684         }
1685
1686         //
1687         // SERVICE METHODS
1688         //
1689
1690         /**
1691          * Starts the core.
1692          */
1693         @Override
1694         public void serviceStart() {
1695                 loadConfiguration();
1696                 updateChecker.start();
1697                 identityManager.start();
1698                 webOfTrustUpdater.init();
1699                 webOfTrustUpdater.start();
1700                 database.start();
1701         }
1702
1703         /**
1704          * {@inheritDoc}
1705          */
1706         @Override
1707         public void serviceRun() {
1708                 long lastSaved = System.currentTimeMillis();
1709                 while (!shouldStop()) {
1710                         sleep(1000);
1711                         long now = System.currentTimeMillis();
1712                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1713                                 for (Sone localSone : getLocalSones()) {
1714                                         saveSone(localSone);
1715                                 }
1716                                 saveConfiguration();
1717                                 lastSaved = now;
1718                         }
1719                 }
1720         }
1721
1722         /**
1723          * Stops the core.
1724          */
1725         @Override
1726         public void serviceStop() {
1727                 localElementTicker.shutdownNow();
1728                 synchronized (sones) {
1729                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1730                                 soneInserter.getValue().stop();
1731                                 saveSone(soneInserter.getKey());
1732                         }
1733                 }
1734                 saveConfiguration();
1735                 database.stop();
1736                 webOfTrustUpdater.stop();
1737                 updateChecker.stop();
1738                 soneDownloader.stop();
1739                 soneDownloaders.shutdown();
1740                 identityManager.stop();
1741         }
1742
1743         //
1744         // PRIVATE METHODS
1745         //
1746
1747         /**
1748          * Saves the given Sone. This will persist all local settings for the given
1749          * Sone, such as the friends list and similar, private options.
1750          *
1751          * @param sone
1752          *            The Sone to save
1753          */
1754         private synchronized void saveSone(Sone sone) {
1755                 if (!sone.isLocal()) {
1756                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1757                         return;
1758                 }
1759                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1760                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1761                         return;
1762                 }
1763
1764                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1765                 try {
1766                         /* save Sone into configuration. */
1767                         String sonePrefix = "Sone/" + sone.getId();
1768                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1769                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1770
1771                         /* save profile. */
1772                         Profile profile = sone.getProfile();
1773                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1774                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1775                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1776                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1777                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1778                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1779                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1780
1781                         /* save profile fields. */
1782                         int fieldCounter = 0;
1783                         for (Field profileField : profile.getFields()) {
1784                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1785                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1786                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1787                         }
1788                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1789
1790                         /* save posts. */
1791                         int postCounter = 0;
1792                         for (Post post : sone.getPosts()) {
1793                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1794                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1795                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1796                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1797                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1798                         }
1799                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1800
1801                         /* save replies. */
1802                         int replyCounter = 0;
1803                         for (PostReply reply : sone.getReplies()) {
1804                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1805                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1806                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1807                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1808                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1809                         }
1810                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1811
1812                         /* save post likes. */
1813                         int postLikeCounter = 0;
1814                         for (String postId : sone.getLikedPostIds()) {
1815                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1816                         }
1817                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1818
1819                         /* save reply likes. */
1820                         int replyLikeCounter = 0;
1821                         for (String replyId : sone.getLikedReplyIds()) {
1822                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1823                         }
1824                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1825
1826                         /* save friends. */
1827                         int friendCounter = 0;
1828                         for (String friendId : sone.getFriends()) {
1829                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1830                         }
1831                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1832
1833                         /* save albums. first, collect in a flat structure, top-level first. */
1834                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1835
1836                         int albumCounter = 0;
1837                         for (Album album : albums) {
1838                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1839                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1840                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1841                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1842                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1843                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1844                         }
1845                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1846
1847                         /* save images. */
1848                         int imageCounter = 0;
1849                         for (Album album : albums) {
1850                                 for (Image image : album.getImages()) {
1851                                         if (!image.isInserted()) {
1852                                                 continue;
1853                                         }
1854                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1855                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1856                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1857                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1858                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1859                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1860                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1861                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1862                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1863                                 }
1864                         }
1865                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1866
1867                         /* save options. */
1868                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1869                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
1870                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
1871                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
1872                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
1873                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
1874
1875                         configuration.save();
1876
1877                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1878
1879                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1880                 } catch (ConfigurationException ce1) {
1881                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1882                 }
1883         }
1884
1885         /**
1886          * Saves the current options.
1887          */
1888         private void saveConfiguration() {
1889                 synchronized (configuration) {
1890                         if (storingConfiguration) {
1891                                 logger.log(Level.FINE, "Already storing configuration…");
1892                                 return;
1893                         }
1894                         storingConfiguration = true;
1895                 }
1896
1897                 /* store the options first. */
1898                 try {
1899                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
1900                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1901                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
1902                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
1903                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
1904                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
1905                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
1906                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
1907                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
1908                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
1909                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
1910                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
1911
1912                         /* save known Sones. */
1913                         int soneCounter = 0;
1914                         synchronized (knownSones) {
1915                                 for (String knownSoneId : knownSones) {
1916                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1917                                 }
1918                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1919                         }
1920
1921                         /* save Sone following times. */
1922                         soneCounter = 0;
1923                         synchronized (soneFollowingTimes) {
1924                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1925                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1926                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1927                                         ++soneCounter;
1928                                 }
1929                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1930                         }
1931
1932                         /* save known posts. */
1933                         database.save();
1934
1935                         /* save bookmarked posts. */
1936                         int bookmarkedPostCounter = 0;
1937                         synchronized (bookmarkedPosts) {
1938                                 for (String bookmarkedPostId : bookmarkedPosts) {
1939                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
1940                                 }
1941                         }
1942                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
1943
1944                         /* now save it. */
1945                         configuration.save();
1946
1947                 } catch (ConfigurationException ce1) {
1948                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1949                 } catch (DatabaseException de1) {
1950                         logger.log(Level.SEVERE, "Could not save database!", de1);
1951                 } finally {
1952                         synchronized (configuration) {
1953                                 storingConfiguration = false;
1954                         }
1955                 }
1956         }
1957
1958         /**
1959          * Loads the configuration.
1960          */
1961         private void loadConfiguration() {
1962                 /* create options. */
1963                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
1964
1965                         @Override
1966                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
1967                                 SoneInserter.setInsertionDelay(newValue);
1968                         }
1969
1970                 }));
1971                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
1972                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
1973                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
1974                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
1975                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
1976                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
1977                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
1978                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
1979                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
1980
1981                         @Override
1982                         @SuppressWarnings("synthetic-access")
1983                         public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
1984                                 fcpInterface.setActive(newValue);
1985                         }
1986                 }));
1987                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
1988
1989                         @Override
1990                         @SuppressWarnings("synthetic-access")
1991                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
1992                                 fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
1993                         }
1994
1995                 }));
1996
1997                 loadConfigurationValue("InsertionDelay");
1998                 loadConfigurationValue("PostsPerPage");
1999                 loadConfigurationValue("ImagesPerPage");
2000                 loadConfigurationValue("CharactersPerPost");
2001                 loadConfigurationValue("PostCutOffLength");
2002                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
2003                 loadConfigurationValue("PositiveTrust");
2004                 loadConfigurationValue("NegativeTrust");
2005                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2006                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2007                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2008
2009                 /* load known Sones. */
2010                 int soneCounter = 0;
2011                 while (true) {
2012                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2013                         if (knownSoneId == null) {
2014                                 break;
2015                         }
2016                         synchronized (knownSones) {
2017                                 knownSones.add(knownSoneId);
2018                         }
2019                 }
2020
2021                 /* load Sone following times. */
2022                 soneCounter = 0;
2023                 while (true) {
2024                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2025                         if (soneId == null) {
2026                                 break;
2027                         }
2028                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2029                         synchronized (soneFollowingTimes) {
2030                                 soneFollowingTimes.put(soneId, time);
2031                         }
2032                         ++soneCounter;
2033                 }
2034
2035                 /* load bookmarked posts. */
2036                 int bookmarkedPostCounter = 0;
2037                 while (true) {
2038                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2039                         if (bookmarkedPostId == null) {
2040                                 break;
2041                         }
2042                         synchronized (bookmarkedPosts) {
2043                                 bookmarkedPosts.add(bookmarkedPostId);
2044                         }
2045                 }
2046
2047         }
2048
2049         /**
2050          * Loads an {@link Integer} configuration value for the option with the
2051          * given name, logging validation failures.
2052          *
2053          * @param optionName
2054          *            The name of the option to load
2055          */
2056         private void loadConfigurationValue(String optionName) {
2057                 try {
2058                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2059                 } catch (IllegalArgumentException iae1) {
2060                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2061                 }
2062         }
2063
2064         /**
2065          * Notifies the core that a new {@link OwnIdentity} was added.
2066          *
2067          * @param ownIdentityAddedEvent
2068          *            The event
2069          */
2070         @Subscribe
2071         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2072                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2073                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2074                 if (ownIdentity.hasContext("Sone")) {
2075                         addLocalSone(ownIdentity);
2076                 }
2077         }
2078
2079         /**
2080          * Notifies the core that an {@link OwnIdentity} was removed.
2081          *
2082          * @param ownIdentityRemovedEvent
2083          *            The event
2084          */
2085         @Subscribe
2086         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2087                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2088                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2089                 trustedIdentities.removeAll(ownIdentity);
2090         }
2091
2092         /**
2093          * Notifies the core that a new {@link Identity} was added.
2094          *
2095          * @param identityAddedEvent
2096          *            The event
2097          */
2098         @Subscribe
2099         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2100                 Identity identity = identityAddedEvent.identity();
2101                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2102                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
2103                 addRemoteSone(identity);
2104         }
2105
2106         /**
2107          * Notifies the core that an {@link Identity} was updated.
2108          *
2109          * @param identityUpdatedEvent
2110          *            The event
2111          */
2112         @Subscribe
2113         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2114                 final Identity identity = identityUpdatedEvent.identity();
2115                 soneDownloaders.execute(new Runnable() {
2116
2117                         @Override
2118                         @SuppressWarnings("synthetic-access")
2119                         public void run() {
2120                                 Sone sone = getRemoteSone(identity.getId(), false);
2121                                 if (sone.isLocal()) {
2122                                         return;
2123                                 }
2124                                 sone.setIdentity(identity);
2125                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2126                                 soneDownloader.addSone(sone);
2127                                 soneDownloader.fetchSone(sone);
2128                         }
2129                 });
2130         }
2131
2132         /**
2133          * Notifies the core that an {@link Identity} was removed.
2134          *
2135          * @param identityRemovedEvent
2136          *            The event
2137          */
2138         @Subscribe
2139         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2140                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2141                 Identity identity = identityRemovedEvent.identity();
2142                 trustedIdentities.remove(ownIdentity, identity);
2143                 boolean foundIdentity = false;
2144                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
2145                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2146                                 continue;
2147                         }
2148                         if (trustedIdentity.getValue().contains(identity)) {
2149                                 foundIdentity = true;
2150                         }
2151                 }
2152                 if (foundIdentity) {
2153                         /* some local identity still trusts this identity, don’t remove. */
2154                         return;
2155                 }
2156                 Optional<Sone> sone = getSone(identity.getId());
2157                 if (!sone.isPresent()) {
2158                         /* TODO - we don’t have the Sone anymore. should this happen? */
2159                         return;
2160                 }
2161                 database.removePosts(sone.get());
2162                 for (Post post : sone.get().getPosts()) {
2163                         eventBus.post(new PostRemovedEvent(post));
2164                 }
2165                 database.removePostReplies(sone.get());
2166                 for (PostReply reply : sone.get().getReplies()) {
2167                         eventBus.post(new PostReplyRemovedEvent(reply));
2168                 }
2169                 synchronized (sones) {
2170                         sones.remove(identity.getId());
2171                 }
2172                 eventBus.post(new SoneRemovedEvent(sone.get()));
2173         }
2174
2175         /**
2176          * Deletes the temporary image.
2177          *
2178          * @param imageInsertFinishedEvent
2179          *            The event
2180          */
2181         @Subscribe
2182         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2183                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2184                 imageInsertFinishedEvent.image().modify().setKey(imageInsertFinishedEvent.resultingUri().toString()).update();
2185                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2186                 touchConfiguration();
2187         }
2188
2189 }