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.TemporaryImage;
  66 import net.pterodactylus.sone.database.Database;
  67 import net.pterodactylus.sone.database.DatabaseException;
  68 import net.pterodactylus.sone.database.PostBuilder;
  69 import net.pterodactylus.sone.database.PostProvider;
  70 import net.pterodactylus.sone.database.PostReplyBuilder;
  71 import net.pterodactylus.sone.database.PostReplyProvider;
  72 import net.pterodactylus.sone.database.SoneProvider;
  73 import net.pterodactylus.sone.fcp.FcpInterface;
  74 import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
  75 import net.pterodactylus.sone.freenet.wot.Identity;
  76 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  77 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  78 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  83 import net.pterodactylus.sone.main.SonePlugin;
  84 import net.pterodactylus.sone.utils.IntegerRangePredicate;
  85 import net.pterodactylus.util.config.Configuration;
  86 import net.pterodactylus.util.config.ConfigurationException;
  87 import net.pterodactylus.util.logging.Logging;
  88 import net.pterodactylus.util.number.Numbers;
  89 import net.pterodactylus.util.service.AbstractService;
  90 import net.pterodactylus.util.thread.NamedThreadFactory;
  91
  92 import com.google.common.base.Optional;
  93 import com.google.common.base.Predicate;
  94 import com.google.common.base.Predicates;
  95 import com.google.common.collect.FluentIterable;
  96 import com.google.common.collect.HashMultimap;
  97 import com.google.common.collect.ImmutableSet;
  98 import com.google.common.collect.Multimap;
  99 import com.google.common.collect.Multimaps;
 100 import com.google.common.eventbus.EventBus;
 101 import com.google.common.eventbus.Subscribe;
 102 import com.google.inject.Inject;
 103
 104 import freenet.keys.FreenetURI;
 105
 106 /**
 107  * The Sone core.
 108  *
 109  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 110  */
 111 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 112
 113         /** The logger. */
 114         private static final Logger logger = Logging.getLogger(Core.class);
 115
 116         /** The start time. */
 117         private final long startupTime = System.currentTimeMillis();
 118
 119         /** The options. */
 120         private final Options options = new Options();
 121
 122         /** The preferences. */
 123         private final Preferences preferences = new Preferences(options);
 124
 125         /** The event bus. */
 126         private final EventBus eventBus;
 127
 128         /** The configuration. */
 129         private Configuration configuration;
 130
 131         /** Whether we’re currently saving the configuration. */
 132         private boolean storingConfiguration = false;
 133
 134         /** The identity manager. */
 135         private final IdentityManager identityManager;
 136
 137         /** Interface to freenet. */
 138         private final FreenetInterface freenetInterface;
 139
 140         /** The Sone downloader. */
 141         private final SoneDownloader soneDownloader;
 142
 143         /** The image inserter. */
 144         private final ImageInserter imageInserter;
 145
 146         /** Sone downloader thread-pool. */
 147         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 148
 149         /** The update checker. */
 150         private final UpdateChecker updateChecker;
 151
 152         /** The trust updater. */
 153         private final WebOfTrustUpdater webOfTrustUpdater;
 154
 155         /** The FCP interface. */
 156         private volatile FcpInterface fcpInterface;
 157
 158         /** The times Sones were followed. */
 159         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 160
 161         /** Locked local Sones. */
 162         /* synchronize on itself. */
 163         private final Set<Sone> lockedSones = new HashSet<Sone>();
 164
 165         /** Sone inserters. */
 166         /* synchronize access on this on sones. */
 167         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 168
 169         /** Sone rescuers. */
 170         /* synchronize access on this on sones. */
 171         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 172
 173         /** All Sones. */
 174         /* synchronize access on this on itself. */
 175         private final Map<String, Sone> sones = new HashMap<String, Sone>();
 176
 177         /** All known Sones. */
 178         private final Set<String> knownSones = new HashSet<String>();
 179
 180         /** The post database. */
 181         private final Database database;
 182
 183         /** All bookmarked posts. */
 184         /* synchronize access on itself. */
 185         private final Set<String> bookmarkedPosts = new HashSet<String>();
 186
 187         /** Trusted identities, sorted by own identities. */
 188         private final Multimap<OwnIdentity, Identity> trustedIdentities = Multimaps.synchronizedSetMultimap(HashMultimap.<OwnIdentity, Identity>create());
 189
 190         /** All known albums. */
 191         private final Map<String, Album> albums = new HashMap<String, Album>();
 192
 193         /** All known images. */
 194         private final Map<String, Image> images = new HashMap<String, Image>();
 195
 196         /** All temporary images. */
 197         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 198
 199         /** Ticker for threads that mark own elements as known. */
 200         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 201
 202         /** The time the configuration was last touched. */
 203         private volatile long lastConfigurationUpdate;
 204
 205         /**
 206          * Creates a new core.
 207          *
 208          * @param configuration
 209          *            The configuration of the core
 210          * @param freenetInterface
 211          *            The freenet interface
 212          * @param identityManager
 213          *            The identity manager
 214          * @param webOfTrustUpdater
 215          *            The WebOfTrust updater
 216          * @param eventBus
 217          *            The event bus
 218          * @param database
 219          *            The database
 220          */
 221         @Inject
 222         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, Database database) {
 223                 super("Sone Core");
 224                 this.configuration = configuration;
 225                 this.freenetInterface = freenetInterface;
 226                 this.identityManager = identityManager;
 227                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 228                 this.imageInserter = new ImageInserter(freenetInterface);
 229                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 230                 this.webOfTrustUpdater = webOfTrustUpdater;
 231                 this.eventBus = eventBus;
 232                 this.database = database;
 233         }
 234
 235         //
 236         // ACCESSORS
 237         //
 238
 239         /**
 240          * Returns the time Sone was started.
 241          *
 242          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 243          */
 244         public long getStartupTime() {
 245                 return startupTime;
 246         }
 247
 248         /**
 249          * Sets the configuration to use. This will automatically save the current
 250          * configuration to the given configuration.
 251          *
 252          * @param configuration
 253          *            The new configuration to use
 254          */
 255         public void setConfiguration(Configuration configuration) {
 256                 this.configuration = configuration;
 257                 touchConfiguration();
 258         }
 259
 260         /**
 261          * Returns the options used by the core.
 262          *
 263          * @return The options of the core
 264          */
 265         public Preferences getPreferences() {
 266                 return preferences;
 267         }
 268
 269         /**
 270          * Returns the identity manager used by the core.
 271          *
 272          * @return The identity manager
 273          */
 274         public IdentityManager getIdentityManager() {
 275                 return identityManager;
 276         }
 277
 278         /**
 279          * Returns the update checker.
 280          *
 281          * @return The update checker
 282          */
 283         public UpdateChecker getUpdateChecker() {
 284                 return updateChecker;
 285         }
 286
 287         /**
 288          * Sets the FCP interface to use.
 289          *
 290          * @param fcpInterface
 291          *            The FCP interface to use
 292          */
 293         public void setFcpInterface(FcpInterface fcpInterface) {
 294                 this.fcpInterface = fcpInterface;
 295         }
 296
 297         /**
 298          * Returns the Sone rescuer for the given local Sone.
 299          *
 300          * @param sone
 301          *            The local Sone to get the rescuer for
 302          * @return The Sone rescuer for the given Sone
 303          */
 304         public SoneRescuer getSoneRescuer(Sone sone) {
 305                 checkNotNull(sone, "sone must not be null");
 306                 checkArgument(sone.isLocal(), "sone must be local");
 307                 synchronized (sones) {
 308                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 309                         if (soneRescuer == null) {
 310                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 311                                 soneRescuers.put(sone, soneRescuer);
 312                                 soneRescuer.start();
 313                         }
 314                         return soneRescuer;
 315                 }
 316         }
 317
 318         /**
 319          * Returns whether the given Sone is currently locked.
 320          *
 321          * @param sone
 322          *            The sone to check
 323          * @return {@code true} if the Sone is locked, {@code false} if it is not
 324          */
 325         public boolean isLocked(Sone sone) {
 326                 synchronized (lockedSones) {
 327                         return lockedSones.contains(sone);
 328                 }
 329         }
 330
 331         /**
 332          * {@inheritDocs}
 333          */
 334         @Override
 335         public Collection<Sone> getSones() {
 336                 synchronized (sones) {
 337                         return ImmutableSet.copyOf(sones.values());
 338                 }
 339         }
 340
 341         /**
 342          * Returns the Sone with the given ID, regardless whether it’s local or
 343          * remote.
 344          *
 345          * @param id
 346          *            The ID of the Sone to get
 347          * @return The Sone with the given ID, or {@code null} if there is no such
 348          *         Sone
 349          */
 350         @Override
 351         public Optional<Sone> getSone(String id) {
 352                 synchronized (sones) {
 353                         return Optional.fromNullable(sones.get(id));
 354                 }
 355         }
 356
 357         /**
 358          * {@inheritDocs}
 359          */
 360         @Override
 361         public Collection<Sone> getLocalSones() {
 362                 synchronized (sones) {
 363                         return FluentIterable.from(sones.values()).filter(new Predicate<Sone>() {
 364
 365                                 @Override
 366                                 public boolean apply(Sone sone) {
 367                                         return sone.isLocal();
 368                                 }
 369                         }).toSet();
 370                 }
 371         }
 372
 373         /**
 374          * Returns the local Sone with the given ID, optionally creating a new Sone.
 375          *
 376          * @param id
 377          *            The ID of the Sone
 378          * @param create
 379          *            {@code true} to create a new Sone if none exists,
 380          *            {@code false} to return null if none exists
 381          * @return The Sone with the given ID, or {@code null}
 382          */
 383         public Sone getLocalSone(String id, boolean create) {
 384                 synchronized (sones) {
 385                         Sone sone = sones.get(id);
 386                         if ((sone == null) && create) {
 387                                 sone = new Sone(id, true);
 388                                 sones.put(id, sone);
 389                         }
 390                         if ((sone != null) && !sone.isLocal()) {
 391                                 sone = new Sone(id, true);
 392                                 sones.put(id, sone);
 393                         }
 394                         return sone;
 395                 }
 396         }
 397
 398         /**
 399          * {@inheritDocs}
 400          */
 401         @Override
 402         public Collection<Sone> getRemoteSones() {
 403                 synchronized (sones) {
 404                         return FluentIterable.from(sones.values()).filter(new Predicate<Sone>() {
 405
 406                                 @Override
 407                                 public boolean apply(Sone sone) {
 408                                         return !sone.isLocal();
 409                                 }
 410                         }).toSet();
 411                 }
 412         }
 413
 414         /**
 415          * Returns the remote Sone with the given ID.
 416          *
 417          * @param id
 418          *            The ID of the remote Sone to get
 419          * @param create
 420          *            {@code true} to always create a Sone, {@code false} to return
 421          *            {@code null} if no Sone with the given ID exists
 422          * @return The Sone with the given ID
 423          */
 424         public Sone getRemoteSone(String id, boolean create) {
 425                 synchronized (sones) {
 426                         Sone sone = sones.get(id);
 427                         if ((sone == null) && create && (id != null) && (id.length() == 43)) {
 428                                 sone = new Sone(id, false);
 429                                 sones.put(id, sone);
 430                         }
 431                         return sone;
 432                 }
 433         }
 434
 435         /**
 436          * Returns whether the given Sone has been modified.
 437          *
 438          * @param sone
 439          *            The Sone to check for modifications
 440          * @return {@code true} if a modification has been detected in the Sone,
 441          *         {@code false} otherwise
 442          */
 443         public boolean isModifiedSone(Sone sone) {
 444                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 445         }
 446
 447         /**
 448          * Returns the time when the given was first followed by any local Sone.
 449          *
 450          * @param sone
 451          *            The Sone to get the time for
 452          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 453          *         been followed, or {@link Long#MAX_VALUE}
 454          */
 455         public long getSoneFollowingTime(Sone sone) {
 456                 synchronized (soneFollowingTimes) {
 457                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 458                 }
 459         }
 460
 461         /**
 462          * Returns whether the target Sone is trusted by the origin Sone.
 463          *
 464          * @param origin
 465          *            The origin Sone
 466          * @param target
 467          *            The target Sone
 468          * @return {@code true} if the target Sone is trusted by the origin Sone
 469          */
 470         public boolean isSoneTrusted(Sone origin, Sone target) {
 471                 checkNotNull(origin, "origin must not be null");
 472                 checkNotNull(target, "target must not be null");
 473                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin’s identity must be an OwnIdentity");
 474                 return trustedIdentities.containsEntry(origin.getIdentity(), target.getIdentity());
 475         }
 476
 477         /**
 478          * Returns a post builder.
 479          *
 480          * @return A new post builder
 481          */
 482         public PostBuilder postBuilder() {
 483                 return database.newPostBuilder();
 484         }
 485
 486         /**
 487          * {@inheritDoc}
 488          */
 489         @Override
 490         public Optional<Post> getPost(String postId) {
 491                 return database.getPost(postId);
 492         }
 493
 494         /**
 495          * {@inheritDocs}
 496          */
 497         @Override
 498         public Collection<Post> getPosts(String soneId) {
 499                 return database.getPosts(soneId);
 500         }
 501
 502         /**
 503          * {@inheritDoc}
 504          */
 505         @Override
 506         public Collection<Post> getDirectedPosts(final String recipientId) {
 507                 checkNotNull(recipientId, "recipient must not be null");
 508                 return database.getDirectedPosts(recipientId);
 509         }
 510
 511         /**
 512          * Returns a post reply builder.
 513          *
 514          * @return A new post reply builder
 515          */
 516         public PostReplyBuilder postReplyBuilder() {
 517                 return database.newPostReplyBuilder();
 518         }
 519
 520         /**
 521          * {@inheritDoc}
 522          */
 523         @Override
 524         public Optional<PostReply> getPostReply(String replyId) {
 525                 return database.getPostReply(replyId);
 526         }
 527
 528         /**
 529          * {@inheritDoc}
 530          */
 531         @Override
 532         public List<PostReply> getReplies(final String postId) {
 533                 return database.getReplies(postId);
 534         }
 535
 536         /**
 537          * Returns all Sones that have liked the given post.
 538          *
 539          * @param post
 540          *            The post to get the liking Sones for
 541          * @return The Sones that like the given post
 542          */
 543         public Set<Sone> getLikes(Post post) {
 544                 Set<Sone> sones = new HashSet<Sone>();
 545                 for (Sone sone : getSones()) {
 546                         if (sone.getLikedPostIds().contains(post.getId())) {
 547                                 sones.add(sone);
 548                         }
 549                 }
 550                 return sones;
 551         }
 552
 553         /**
 554          * Returns all Sones that have liked the given reply.
 555          *
 556          * @param reply
 557          *            The reply to get the liking Sones for
 558          * @return The Sones that like the given reply
 559          */
 560         public Set<Sone> getLikes(PostReply reply) {
 561                 Set<Sone> sones = new HashSet<Sone>();
 562                 for (Sone sone : getSones()) {
 563                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 564                                 sones.add(sone);
 565                         }
 566                 }
 567                 return sones;
 568         }
 569
 570         /**
 571          * Returns whether the given post is bookmarked.
 572          *
 573          * @param post
 574          *            The post to check
 575          * @return {@code true} if the given post is bookmarked, {@code false}
 576          *         otherwise
 577          */
 578         public boolean isBookmarked(Post post) {
 579                 return isPostBookmarked(post.getId());
 580         }
 581
 582         /**
 583          * Returns whether the post with the given ID is bookmarked.
 584          *
 585          * @param id
 586          *            The ID of the post to check
 587          * @return {@code true} if the post with the given ID is bookmarked,
 588          *         {@code false} otherwise
 589          */
 590         public boolean isPostBookmarked(String id) {
 591                 synchronized (bookmarkedPosts) {
 592                         return bookmarkedPosts.contains(id);
 593                 }
 594         }
 595
 596         /**
 597          * Returns all currently known bookmarked posts.
 598          *
 599          * @return All bookmarked posts
 600          */
 601         public Set<Post> getBookmarkedPosts() {
 602                 Set<Post> posts = new HashSet<Post>();
 603                 synchronized (bookmarkedPosts) {
 604                         for (String bookmarkedPostId : bookmarkedPosts) {
 605                                 Optional<Post> post = getPost(bookmarkedPostId);
 606                                 if (post.isPresent()) {
 607                                         posts.add(post.get());
 608                                 }
 609                         }
 610                 }
 611                 return posts;
 612         }
 613
 614         /**
 615          * Returns the album with the given ID, creating a new album if no album
 616          * with the given ID can be found.
 617          *
 618          * @param albumId
 619          *            The ID of the album
 620          * @return The album with the given ID
 621          */
 622         public Album getAlbum(String albumId) {
 623                 return getAlbum(albumId, true);
 624         }
 625
 626         /**
 627          * Returns the album with the given ID, optionally creating a new album if
 628          * an album with the given ID can not be found.
 629          *
 630          * @param albumId
 631          *            The ID of the album
 632          * @param create
 633          *            {@code true} to create a new album if none exists for the
 634          *            given ID
 635          * @return The album with the given ID, or {@code null} if no album with the
 636          *         given ID exists and {@code create} is {@code false}
 637          */
 638         public Album getAlbum(String albumId, boolean create) {
 639                 synchronized (albums) {
 640                         Album album = albums.get(albumId);
 641                         if (create && (album == null)) {
 642                                 album = new Album(albumId);
 643                                 albums.put(albumId, album);
 644                         }
 645                         return album;
 646                 }
 647         }
 648
 649         /**
 650          * Returns the image with the given ID, creating it if necessary.
 651          *
 652          * @param imageId
 653          *            The ID of the image
 654          * @return The image with the given ID
 655          */
 656         public Image getImage(String imageId) {
 657                 return getImage(imageId, true);
 658         }
 659
 660         /**
 661          * Returns the image with the given ID, optionally creating it if it does
 662          * not exist.
 663          *
 664          * @param imageId
 665          *            The ID of the image
 666          * @param create
 667          *            {@code true} to create an image if none exists with the given
 668          *            ID
 669          * @return The image with the given ID, or {@code null} if none exists and
 670          *         none was created
 671          */
 672         public Image getImage(String imageId, boolean create) {
 673                 synchronized (images) {
 674                         Image image = images.get(imageId);
 675                         if (create && (image == null)) {
 676                                 image = new Image(imageId);
 677                                 images.put(imageId, image);
 678                         }
 679                         return image;
 680                 }
 681         }
 682
 683         /**
 684          * Returns the temporary image with the given ID.
 685          *
 686          * @param imageId
 687          *            The ID of the temporary image
 688          * @return The temporary image, or {@code null} if there is no temporary
 689          *         image with the given ID
 690          */
 691         public TemporaryImage getTemporaryImage(String imageId) {
 692                 synchronized (temporaryImages) {
 693                         return temporaryImages.get(imageId);
 694                 }
 695         }
 696
 697         //
 698         // ACTIONS
 699         //
 700
 701         /**
 702          * Locks the given Sone. A locked Sone will not be inserted by
 703          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 704          * again.
 705          *
 706          * @param sone
 707          *            The sone to lock
 708          */
 709         public void lockSone(Sone sone) {
 710                 synchronized (lockedSones) {
 711                         if (lockedSones.add(sone)) {
 712                                 eventBus.post(new SoneLockedEvent(sone));
 713                         }
 714                 }
 715         }
 716
 717         /**
 718          * Unlocks the given Sone.
 719          *
 720          * @see #lockSone(Sone)
 721          * @param sone
 722          *            The sone to unlock
 723          */
 724         public void unlockSone(Sone sone) {
 725                 synchronized (lockedSones) {
 726                         if (lockedSones.remove(sone)) {
 727                                 eventBus.post(new SoneUnlockedEvent(sone));
 728                         }
 729                 }
 730         }
 731
 732         /**
 733          * Adds a local Sone from the given own identity.
 734          *
 735          * @param ownIdentity
 736          *            The own identity to create a Sone from
 737          * @return The added (or already existing) Sone
 738          */
 739         public Sone addLocalSone(OwnIdentity ownIdentity) {
 740                 if (ownIdentity == null) {
 741                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 742                         return null;
 743                 }
 744                 logger.info(String.format("Adding Sone from OwnIdentity: %s", ownIdentity));
 745                 synchronized (sones) {
 746                         final Sone sone;
 747                         try {
 748                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 749                         } catch (MalformedURLException mue1) {
 750                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 751                                 return null;
 752                         }
 753                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 754                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 755                         sone.setKnown(true);
 756                         /* TODO - load posts ’n stuff */
 757                         sones.put(ownIdentity.getId(), sone);
 758                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 759                         soneInserters.put(sone, soneInserter);
 760                         sone.setStatus(SoneStatus.idle);
 761                         loadSone(sone);
 762                         soneInserter.start();
 763                         return sone;
 764                 }
 765         }
 766
 767         /**
 768          * Creates a new Sone for the given own identity.
 769          *
 770          * @param ownIdentity
 771          *            The own identity to create a Sone for
 772          * @return The created Sone
 773          */
 774         public Sone createSone(OwnIdentity ownIdentity) {
 775                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 776                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 777                         return null;
 778                 }
 779                 Sone sone = addLocalSone(ownIdentity);
 780                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 781                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
 782                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
 783                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
 784                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
 785                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 786
 787                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 788                 touchConfiguration();
 789                 return sone;
 790         }
 791
 792         /**
 793          * Adds the Sone of the given identity.
 794          *
 795          * @param identity
 796          *            The identity whose Sone to add
 797          * @return The added or already existing Sone
 798          */
 799         public Sone addRemoteSone(Identity identity) {
 800                 if (identity == null) {
 801                         logger.log(Level.WARNING, "Given Identity is null!");
 802                         return null;
 803                 }
 804                 synchronized (sones) {
 805                         final Sone sone = getRemoteSone(identity.getId(), true);
 806                         if (sone.isLocal()) {
 807                                 return sone;
 808                         }
 809                         sone.setIdentity(identity);
 810                         boolean newSone = sone.getRequestUri() == null;
 811                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 812                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 813                         if (newSone) {
 814                                 synchronized (knownSones) {
 815                                         newSone = !knownSones.contains(sone.getId());
 816                                 }
 817                                 sone.setKnown(!newSone);
 818                                 if (newSone) {
 819                                         eventBus.post(new NewSoneFoundEvent(sone));
 820                                         for (Sone localSone : getLocalSones()) {
 821                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
 822                                                         followSone(localSone, sone.getId());
 823                                                 }
 824                                         }
 825                                 }
 826                         }
 827                         soneDownloader.addSone(sone);
 828                         soneDownloaders.execute(new Runnable() {
 829
 830                                 @Override
 831                                 @SuppressWarnings("synthetic-access")
 832                                 public void run() {
 833                                         soneDownloader.fetchSone(sone, sone.getRequestUri());
 834                                 }
 835
 836                         });
 837                         return sone;
 838                 }
 839         }
 840
 841         /**
 842          * Lets the given local Sone follow the Sone with the given ID.
 843          *
 844          * @param sone
 845          *            The local Sone that should follow another Sone
 846          * @param soneId
 847          *            The ID of the Sone to follow
 848          */
 849         public void followSone(Sone sone, String soneId) {
 850                 checkNotNull(sone, "sone must not be null");
 851                 checkNotNull(soneId, "soneId must not be null");
 852                 sone.addFriend(soneId);
 853                 synchronized (soneFollowingTimes) {
 854                         if (!soneFollowingTimes.containsKey(soneId)) {
 855                                 long now = System.currentTimeMillis();
 856                                 soneFollowingTimes.put(soneId, now);
 857                                 Optional<Sone> followedSone = getSone(soneId);
 858                                 if (!followedSone.isPresent()) {
 859                                         return;
 860                                 }
 861                                 for (Post post : followedSone.get().getPosts()) {
 862                                         if (post.getTime() < now) {
 863                                                 markPostKnown(post);
 864                                         }
 865                                 }
 866                                 for (PostReply reply : followedSone.get().getReplies()) {
 867                                         if (reply.getTime() < now) {
 868                                                 markReplyKnown(reply);
 869                                         }
 870                                 }
 871                         }
 872                 }
 873                 touchConfiguration();
 874         }
 875
 876         /**
 877          * Lets the given local Sone unfollow the Sone with the given ID.
 878          *
 879          * @param sone
 880          *            The local Sone that should unfollow another Sone
 881          * @param soneId
 882          *            The ID of the Sone being unfollowed
 883          */
 884         public void unfollowSone(Sone sone, String soneId) {
 885                 checkNotNull(sone, "sone must not be null");
 886                 checkNotNull(soneId, "soneId must not be null");
 887                 sone.removeFriend(soneId);
 888                 boolean unfollowedSoneStillFollowed = false;
 889                 for (Sone localSone : getLocalSones()) {
 890                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 891                 }
 892                 if (!unfollowedSoneStillFollowed) {
 893                         synchronized (soneFollowingTimes) {
 894                                 soneFollowingTimes.remove(soneId);
 895                         }
 896                 }
 897                 touchConfiguration();
 898         }
 899
 900         /**
 901          * Sets the trust value of the given origin Sone for the target Sone.
 902          *
 903          * @param origin
 904          *            The origin Sone
 905          * @param target
 906          *            The target Sone
 907          * @param trustValue
 908          *            The trust value (from {@code -100} to {@code 100})
 909          */
 910         public void setTrust(Sone origin, Sone target, int trustValue) {
 911                 checkNotNull(origin, "origin must not be null");
 912                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 913                 checkNotNull(target, "target must not be null");
 914                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 915                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 916         }
 917
 918         /**
 919          * Removes any trust assignment for the given target Sone.
 920          *
 921          * @param origin
 922          *            The trust origin
 923          * @param target
 924          *            The trust target
 925          */
 926         public void removeTrust(Sone origin, Sone target) {
 927                 checkNotNull(origin, "origin must not be null");
 928                 checkNotNull(target, "target must not be null");
 929                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 930                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 931         }
 932
 933         /**
 934          * Assigns the configured positive trust value for the given target.
 935          *
 936          * @param origin
 937          *            The trust origin
 938          * @param target
 939          *            The trust target
 940          */
 941         public void trustSone(Sone origin, Sone target) {
 942                 setTrust(origin, target, preferences.getPositiveTrust());
 943         }
 944
 945         /**
 946          * Assigns the configured negative trust value for the given target.
 947          *
 948          * @param origin
 949          *            The trust origin
 950          * @param target
 951          *            The trust target
 952          */
 953         public void distrustSone(Sone origin, Sone target) {
 954                 setTrust(origin, target, preferences.getNegativeTrust());
 955         }
 956
 957         /**
 958          * Removes the trust assignment for the given target.
 959          *
 960          * @param origin
 961          *            The trust origin
 962          * @param target
 963          *            The trust target
 964          */
 965         public void untrustSone(Sone origin, Sone target) {
 966                 removeTrust(origin, target);
 967         }
 968
 969         /**
 970          * Updates the stored Sone with the given Sone.
 971          *
 972          * @param sone
 973          *            The updated Sone
 974          */
 975         public void updateSone(Sone sone) {
 976                 updateSone(sone, false);
 977         }
 978
 979         /**
 980          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
 981          * {@code true}, an older Sone than the current Sone can be given to restore
 982          * an old state.
 983          *
 984          * @param sone
 985          *            The Sone to update
 986          * @param soneRescueMode
 987          *            {@code true} if the stored Sone should be updated regardless
 988          *            of the age of the given Sone
 989          */
 990         public void updateSone(Sone sone, boolean soneRescueMode) {
 991                 Optional<Sone> storedSone = getSone(sone.getId());
 992                 if (storedSone.isPresent()) {
 993                         if (!soneRescueMode && !(sone.getTime() > storedSone.get().getTime())) {
 994                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
 995                                 return;
 996                         }
 997                         /* find removed posts. */
 998                         Collection<Post> existingPosts = database.getPosts(sone.getId());
 999                         for (Post oldPost : existingPosts) {
1000                                 if (!sone.getPosts().contains(oldPost)) {
1001                                         eventBus.post(new PostRemovedEvent(oldPost));
1002                                 }
1003                         }
1004                         /* find new posts. */
1005                         for (Post newPost : sone.getPosts()) {
1006                                 if (existingPosts.contains(newPost)) {
1007                                         continue;
1008                                 }
1009                                 if (newPost.getTime() < getSoneFollowingTime(sone)) {
1010                                         newPost.setKnown(true);
1011                                 } else if (!newPost.isKnown()) {
1012                                         eventBus.post(new NewPostFoundEvent(newPost));
1013                                 }
1014                         }
1015                         /* store posts. */
1016                         database.storePosts(sone, sone.getPosts());
1017                         if (!soneRescueMode) {
1018                                 for (PostReply reply : storedSone.get().getReplies()) {
1019                                         if (!sone.getReplies().contains(reply)) {
1020                                                 eventBus.post(new PostReplyRemovedEvent(reply));
1021                                         }
1022                                 }
1023                         }
1024                         Set<PostReply> storedReplies = storedSone.get().getReplies();
1025                         for (PostReply reply : sone.getReplies()) {
1026                                 if (storedReplies.contains(reply)) {
1027                                         continue;
1028                                 }
1029                                 if (reply.getTime() < getSoneFollowingTime(sone)) {
1030                                         reply.setKnown(true);
1031                                 } else if (!reply.isKnown()) {
1032                                         eventBus.post(new NewPostReplyFoundEvent(reply));
1033                                 }
1034                         }
1035                         database.storePostReplies(sone, sone.getReplies());
1036                         synchronized (albums) {
1037                                 synchronized (images) {
1038                                         for (Album album : storedSone.get().getRootAlbum().getAlbums()) {
1039                                                 albums.remove(album.getId());
1040                                                 for (Image image : album.getImages()) {
1041                                                         images.remove(image.getId());
1042                                                 }
1043                                         }
1044                                         for (Album album : sone.getRootAlbum().getAlbums()) {
1045                                                 albums.put(album.getId(), album);
1046                                                 for (Image image : album.getImages()) {
1047                                                         images.put(image.getId(), image);
1048                                                 }
1049                                         }
1050                                 }
1051                         }
1052                         synchronized (sones) {
1053                                 sone.setOptions(storedSone.get().getOptions());
1054                                 sone.setKnown(storedSone.get().isKnown());
1055                                 sone.setStatus((sone.getTime() == 0) ? SoneStatus.unknown : SoneStatus.idle);
1056                                 if (sone.isLocal()) {
1057                                         soneInserters.get(storedSone.get()).setSone(sone);
1058                                         touchConfiguration();
1059                                 }
1060                                 sones.put(sone.getId(), sone);
1061                         }
1062                 }
1063         }
1064
1065         /**
1066          * Deletes the given Sone. This will remove the Sone from the
1067          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1068          * remove the context from its identity.
1069          *
1070          * @param sone
1071          *            The Sone to delete
1072          */
1073         public void deleteSone(Sone sone) {
1074                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1075                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1076                         return;
1077                 }
1078                 synchronized (sones) {
1079                         if (!getLocalSones().contains(sone)) {
1080                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1081                                 return;
1082                         }
1083                         sones.remove(sone.getId());
1084                         SoneInserter soneInserter = soneInserters.remove(sone);
1085                         soneInserter.stop();
1086                 }
1087                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1088                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1089                 try {
1090                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1091                 } catch (ConfigurationException ce1) {
1092                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1093                 }
1094         }
1095
1096         /**
1097          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1098          * known} before, a {@link MarkSoneKnownEvent} is fired.
1099          *
1100          * @param sone
1101          *            The Sone to mark as known
1102          */
1103         public void markSoneKnown(Sone sone) {
1104                 if (!sone.isKnown()) {
1105                         sone.setKnown(true);
1106                         synchronized (knownSones) {
1107                                 knownSones.add(sone.getId());
1108                         }
1109                         eventBus.post(new MarkSoneKnownEvent(sone));
1110                         touchConfiguration();
1111                 }
1112         }
1113
1114         /**
1115          * Loads and updates the given Sone from the configuration. If any error is
1116          * encountered, loading is aborted and the given Sone is not changed.
1117          *
1118          * @param sone
1119          *            The Sone to load and update
1120          */
1121         public void loadSone(Sone sone) {
1122                 if (!sone.isLocal()) {
1123                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1124                         return;
1125                 }
1126                 logger.info(String.format("Loading local Sone: %s", sone));
1127
1128                 /* initialize options. */
1129                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1130                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
1131                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
1132                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
1133                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
1134                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
1135
1136                 /* load Sone. */
1137                 String sonePrefix = "Sone/" + sone.getId();
1138                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1139                 if (soneTime == null) {
1140                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1141                         return;
1142                 }
1143                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1144
1145                 /* load profile. */
1146                 Profile profile = new Profile(sone);
1147                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1148                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1149                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1150                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1151                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1152                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1153
1154                 /* load profile fields. */
1155                 while (true) {
1156                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1157                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1158                         if (fieldName == null) {
1159                                 break;
1160                         }
1161                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1162                         profile.addField(fieldName).setValue(fieldValue);
1163                 }
1164
1165                 /* load posts. */
1166                 Set<Post> posts = new HashSet<Post>();
1167                 while (true) {
1168                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1169                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1170                         if (postId == null) {
1171                                 break;
1172                         }
1173                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1174                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1175                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1176                         if ((postTime == 0) || (postText == null)) {
1177                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1178                                 return;
1179                         }
1180                         PostBuilder postBuilder = postBuilder().withId(postId).from(sone.getId()).withTime(postTime).withText(postText);
1181                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1182                                 postBuilder.to(postRecipientId);
1183                         }
1184                         posts.add(postBuilder.build());
1185                 }
1186
1187                 /* load replies. */
1188                 Set<PostReply> replies = new HashSet<PostReply>();
1189                 while (true) {
1190                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1191                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1192                         if (replyId == null) {
1193                                 break;
1194                         }
1195                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1196                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1197                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1198                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1199                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1200                                 return;
1201                         }
1202                         PostReplyBuilder postReplyBuilder = postReplyBuilder().withId(replyId).from(sone.getId()).to(postId).withTime(replyTime).withText(replyText);
1203                         replies.add(postReplyBuilder.build());
1204                 }
1205
1206                 /* load post likes. */
1207                 Set<String> likedPostIds = new HashSet<String>();
1208                 while (true) {
1209                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1210                         if (likedPostId == null) {
1211                                 break;
1212                         }
1213                         likedPostIds.add(likedPostId);
1214                 }
1215
1216                 /* load reply likes. */
1217                 Set<String> likedReplyIds = new HashSet<String>();
1218                 while (true) {
1219                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1220                         if (likedReplyId == null) {
1221                                 break;
1222                         }
1223                         likedReplyIds.add(likedReplyId);
1224                 }
1225
1226                 /* load friends. */
1227                 Set<String> friends = new HashSet<String>();
1228                 while (true) {
1229                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1230                         if (friendId == null) {
1231                                 break;
1232                         }
1233                         friends.add(friendId);
1234                 }
1235
1236                 /* load albums. */
1237                 List<Album> topLevelAlbums = new ArrayList<Album>();
1238                 int albumCounter = 0;
1239                 while (true) {
1240                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1241                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1242                         if (albumId == null) {
1243                                 break;
1244                         }
1245                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1246                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1247                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1248                         String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
1249                         if ((albumTitle == null) || (albumDescription == null)) {
1250                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1251                                 return;
1252                         }
1253                         Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId);
1254                         if (albumParentId != null) {
1255                                 Album parentAlbum = getAlbum(albumParentId, false);
1256                                 if (parentAlbum == null) {
1257                                         logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
1258                                         return;
1259                                 }
1260                                 parentAlbum.addAlbum(album);
1261                         } else {
1262                                 if (!topLevelAlbums.contains(album)) {
1263                                         topLevelAlbums.add(album);
1264                                 }
1265                         }
1266                 }
1267
1268                 /* load images. */
1269                 int imageCounter = 0;
1270                 while (true) {
1271                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1272                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1273                         if (imageId == null) {
1274                                 break;
1275                         }
1276                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1277                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1278                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1279                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1280                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1281                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1282                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1283                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1284                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1285                                 return;
1286                         }
1287                         Album album = getAlbum(albumId, false);
1288                         if (album == null) {
1289                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1290                                 return;
1291                         }
1292                         Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
1293                         image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
1294                         album.addImage(image);
1295                 }
1296
1297                 /* load avatar. */
1298                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1299                 if (avatarId != null) {
1300                         profile.setAvatar(getImage(avatarId, false));
1301                 }
1302
1303                 /* load options. */
1304                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1305                 sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1306                 sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1307                 sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1308                 sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1309                 sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1310
1311                 /* if we’re still here, Sone was loaded successfully. */
1312                 synchronized (sone) {
1313                         sone.setTime(soneTime);
1314                         sone.setProfile(profile);
1315                         sone.setPosts(posts);
1316                         sone.setReplies(replies);
1317                         sone.setLikePostIds(likedPostIds);
1318                         sone.setLikeReplyIds(likedReplyIds);
1319                         for (String friendId : friends) {
1320                                 followSone(sone, friendId);
1321                         }
1322                         for (Album album : sone.getRootAlbum().getAlbums()) {
1323                                 sone.getRootAlbum().removeAlbum(album);
1324                         }
1325                         for (Album album : topLevelAlbums) {
1326                                 sone.getRootAlbum().addAlbum(album);
1327                         }
1328                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1329                 }
1330                 synchronized (knownSones) {
1331                         for (String friend : friends) {
1332                                 knownSones.add(friend);
1333                         }
1334                 }
1335                 database.storePosts(sone, posts);
1336                 for (Post post : posts) {
1337                         post.setKnown(true);
1338                 }
1339                 database.storePostReplies(sone, replies);
1340                 for (PostReply reply : replies) {
1341                         reply.setKnown(true);
1342                 }
1343
1344                 logger.info(String.format("Sone loaded successfully: %s", sone));
1345         }
1346
1347         /**
1348          * Creates a new post.
1349          *
1350          * @param sone
1351          *            The Sone that creates the post
1352          * @param text
1353          *            The text of the post
1354          * @return The created post
1355          */
1356         public Post createPost(Sone sone, String text) {
1357                 return createPost(sone, System.currentTimeMillis(), text);
1358         }
1359
1360         /**
1361          * Creates a new post.
1362          *
1363          * @param sone
1364          *            The Sone that creates the post
1365          * @param time
1366          *            The time of the post
1367          * @param text
1368          *            The text of the post
1369          * @return The created post
1370          */
1371         public Post createPost(Sone sone, long time, String text) {
1372                 return createPost(sone, null, time, text);
1373         }
1374
1375         /**
1376          * Creates a new post.
1377          *
1378          * @param sone
1379          *            The Sone that creates the post
1380          * @param recipient
1381          *            The recipient Sone, or {@code null} if this post does not have
1382          *            a recipient
1383          * @param text
1384          *            The text of the post
1385          * @return The created post
1386          */
1387         public Post createPost(Sone sone, Optional<Sone> recipient, String text) {
1388                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1389         }
1390
1391         /**
1392          * Creates a new post.
1393          *
1394          * @param sone
1395          *            The Sone that creates the post
1396          * @param recipient
1397          *            The recipient Sone, or {@code null} if this post does not have
1398          *            a recipient
1399          * @param time
1400          *            The time of the post
1401          * @param text
1402          *            The text of the post
1403          * @return The created post
1404          */
1405         public Post createPost(Sone sone, Optional<Sone> recipient, long time, String text) {
1406                 checkNotNull(text, "text must not be null");
1407                 checkArgument(text.trim().length() > 0, "text must not be empty");
1408                 if (!sone.isLocal()) {
1409                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1410                         return null;
1411                 }
1412                 PostBuilder postBuilder = database.newPostBuilder();
1413                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1414                 if (recipient.isPresent()) {
1415                         postBuilder.to(recipient.get().getId());
1416                 }
1417                 final Post post = postBuilder.build();
1418                 database.storePost(post);
1419                 eventBus.post(new NewPostFoundEvent(post));
1420                 sone.addPost(post);
1421                 touchConfiguration();
1422                 localElementTicker.schedule(new Runnable() {
1423
1424                         /**
1425                          * {@inheritDoc}
1426                          */
1427                         @Override
1428                         public void run() {
1429                                 markPostKnown(post);
1430                         }
1431                 }, 10, TimeUnit.SECONDS);
1432                 return post;
1433         }
1434
1435         /**
1436          * Deletes the given post.
1437          *
1438          * @param post
1439          *            The post to delete
1440          */
1441         public void deletePost(Post post) {
1442                 if (!post.getSone().isLocal()) {
1443                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1444                         return;
1445                 }
1446                 database.removePost(post);
1447                 eventBus.post(new PostRemovedEvent(post));
1448                 markPostKnown(post);
1449                 touchConfiguration();
1450         }
1451
1452         /**
1453          * Marks the given post as known, if it is currently not a known post
1454          * (according to {@link Post#isKnown()}).
1455          *
1456          * @param post
1457          *            The post to mark as known
1458          */
1459         public void markPostKnown(Post post) {
1460                 post.setKnown(true);
1461                 eventBus.post(new MarkPostKnownEvent(post));
1462                 touchConfiguration();
1463                 for (PostReply reply : getReplies(post.getId())) {
1464                         markReplyKnown(reply);
1465                 }
1466         }
1467
1468         /**
1469          * Bookmarks the given post.
1470          *
1471          * @param post
1472          *            The post to bookmark
1473          */
1474         public void bookmark(Post post) {
1475                 bookmarkPost(post.getId());
1476         }
1477
1478         /**
1479          * Bookmarks the post with the given ID.
1480          *
1481          * @param id
1482          *            The ID of the post to bookmark
1483          */
1484         public void bookmarkPost(String id) {
1485                 synchronized (bookmarkedPosts) {
1486                         bookmarkedPosts.add(id);
1487                 }
1488         }
1489
1490         /**
1491          * Removes the given post from the bookmarks.
1492          *
1493          * @param post
1494          *            The post to unbookmark
1495          */
1496         public void unbookmark(Post post) {
1497                 unbookmarkPost(post.getId());
1498         }
1499
1500         /**
1501          * Removes the post with the given ID from the bookmarks.
1502          *
1503          * @param id
1504          *            The ID of the post to unbookmark
1505          */
1506         public void unbookmarkPost(String id) {
1507                 synchronized (bookmarkedPosts) {
1508                         bookmarkedPosts.remove(id);
1509                 }
1510         }
1511
1512         /**
1513          * Creates a new reply.
1514          *
1515          * @param sone
1516          *            The Sone that creates the reply
1517          * @param post
1518          *            The post that this reply refers to
1519          * @param text
1520          *            The text of the reply
1521          * @return The created reply
1522          */
1523         public PostReply createReply(Sone sone, Post post, String text) {
1524                 checkNotNull(text, "text must not be null");
1525                 checkArgument(text.trim().length() > 0, "text must not be empty");
1526                 if (!sone.isLocal()) {
1527                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1528                         return null;
1529                 }
1530                 PostReplyBuilder postReplyBuilder = postReplyBuilder();
1531                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1532                 final PostReply reply = postReplyBuilder.build();
1533                 database.storePostReply(reply);
1534                 eventBus.post(new NewPostReplyFoundEvent(reply));
1535                 sone.addReply(reply);
1536                 touchConfiguration();
1537                 localElementTicker.schedule(new Runnable() {
1538
1539                         /**
1540                          * {@inheritDoc}
1541                          */
1542                         @Override
1543                         public void run() {
1544                                 markReplyKnown(reply);
1545                         }
1546                 }, 10, TimeUnit.SECONDS);
1547                 return reply;
1548         }
1549
1550         /**
1551          * Deletes the given reply.
1552          *
1553          * @param reply
1554          *            The reply to delete
1555          */
1556         public void deleteReply(PostReply reply) {
1557                 Sone sone = reply.getSone();
1558                 if (!sone.isLocal()) {
1559                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1560                         return;
1561                 }
1562                 database.removePostReply(reply);
1563                 markReplyKnown(reply);
1564                 sone.removeReply(reply);
1565                 touchConfiguration();
1566         }
1567
1568         /**
1569          * Marks the given reply as known, if it is currently not a known reply
1570          * (according to {@link Reply#isKnown()}).
1571          *
1572          * @param reply
1573          *            The reply to mark as known
1574          */
1575         public void markReplyKnown(PostReply reply) {
1576                 boolean previouslyKnown = reply.isKnown();
1577                 reply.setKnown(true);
1578                 eventBus.post(new MarkPostReplyKnownEvent(reply));
1579                 if (!previouslyKnown) {
1580                         touchConfiguration();
1581                 }
1582         }
1583
1584         /**
1585          * Creates a new top-level album for the given Sone.
1586          *
1587          * @param sone
1588          *            The Sone to create the album for
1589          * @return The new album
1590          */
1591         public Album createAlbum(Sone sone) {
1592                 return createAlbum(sone, sone.getRootAlbum());
1593         }
1594
1595         /**
1596          * Creates a new album for the given Sone.
1597          *
1598          * @param sone
1599          *            The Sone to create the album for
1600          * @param parent
1601          *            The parent of the album (may be {@code null} to create a
1602          *            top-level album)
1603          * @return The new album
1604          */
1605         public Album createAlbum(Sone sone, Album parent) {
1606                 Album album = new Album();
1607                 synchronized (albums) {
1608                         albums.put(album.getId(), album);
1609                 }
1610                 album.setSone(sone);
1611                 parent.addAlbum(album);
1612                 return album;
1613         }
1614
1615         /**
1616          * Deletes the given album. The owner of the album has to be a local Sone,
1617          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1618          *
1619          * @param album
1620          *            The album to remove
1621          */
1622         public void deleteAlbum(Album album) {
1623                 checkNotNull(album, "album must not be null");
1624                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1625                 if (!album.isEmpty()) {
1626                         return;
1627                 }
1628                 album.getParent().removeAlbum(album);
1629                 synchronized (albums) {
1630                         albums.remove(album.getId());
1631                 }
1632                 touchConfiguration();
1633         }
1634
1635         /**
1636          * Creates a new image.
1637          *
1638          * @param sone
1639          *            The Sone creating the image
1640          * @param album
1641          *            The album the image will be inserted into
1642          * @param temporaryImage
1643          *            The temporary image to create the image from
1644          * @return The newly created image
1645          */
1646         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1647                 checkNotNull(sone, "sone must not be null");
1648                 checkNotNull(album, "album must not be null");
1649                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1650                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1651                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1652                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1653                 album.addImage(image);
1654                 synchronized (images) {
1655                         images.put(image.getId(), image);
1656                 }
1657                 imageInserter.insertImage(temporaryImage, image);
1658                 return image;
1659         }
1660
1661         /**
1662          * Deletes the given image. This method will also delete a matching
1663          * temporary image.
1664          *
1665          * @see #deleteTemporaryImage(TemporaryImage)
1666          * @param image
1667          *            The image to delete
1668          */
1669         public void deleteImage(Image image) {
1670                 checkNotNull(image, "image must not be null");
1671                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1672                 deleteTemporaryImage(image.getId());
1673                 image.getAlbum().removeImage(image);
1674                 synchronized (images) {
1675                         images.remove(image.getId());
1676                 }
1677                 touchConfiguration();
1678         }
1679
1680         /**
1681          * Creates a new temporary image.
1682          *
1683          * @param mimeType
1684          *            The MIME type of the temporary image
1685          * @param imageData
1686          *            The encoded data of the image
1687          * @return The temporary image
1688          */
1689         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1690                 TemporaryImage temporaryImage = new TemporaryImage();
1691                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1692                 synchronized (temporaryImages) {
1693                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1694                 }
1695                 return temporaryImage;
1696         }
1697
1698         /**
1699          * Deletes the given temporary image.
1700          *
1701          * @param temporaryImage
1702          *            The temporary image to delete
1703          */
1704         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1705                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1706                 deleteTemporaryImage(temporaryImage.getId());
1707         }
1708
1709         /**
1710          * Deletes the temporary image with the given ID.
1711          *
1712          * @param imageId
1713          *            The ID of the temporary image to delete
1714          */
1715         public void deleteTemporaryImage(String imageId) {
1716                 checkNotNull(imageId, "imageId must not be null");
1717                 synchronized (temporaryImages) {
1718                         temporaryImages.remove(imageId);
1719                 }
1720                 Image image = getImage(imageId, false);
1721                 if (image != null) {
1722                         imageInserter.cancelImageInsert(image);
1723                 }
1724         }
1725
1726         /**
1727          * Notifies the core that the configuration, either of the core or of a
1728          * single local Sone, has changed, and that the configuration should be
1729          * saved.
1730          */
1731         public void touchConfiguration() {
1732                 lastConfigurationUpdate = System.currentTimeMillis();
1733         }
1734
1735         //
1736         // SERVICE METHODS
1737         //
1738
1739         /**
1740          * Starts the core.
1741          */
1742         @Override
1743         public void serviceStart() {
1744                 loadConfiguration();
1745                 updateChecker.start();
1746                 identityManager.start();
1747                 webOfTrustUpdater.init();
1748                 webOfTrustUpdater.start();
1749                 database.start();
1750         }
1751
1752         /**
1753          * {@inheritDoc}
1754          */
1755         @Override
1756         public void serviceRun() {
1757                 long lastSaved = System.currentTimeMillis();
1758                 while (!shouldStop()) {
1759                         sleep(1000);
1760                         long now = System.currentTimeMillis();
1761                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1762                                 for (Sone localSone : getLocalSones()) {
1763                                         saveSone(localSone);
1764                                 }
1765                                 saveConfiguration();
1766                                 lastSaved = now;
1767                         }
1768                 }
1769         }
1770
1771         /**
1772          * Stops the core.
1773          */
1774         @Override
1775         public void serviceStop() {
1776                 localElementTicker.shutdownNow();
1777                 synchronized (sones) {
1778                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1779                                 soneInserter.getValue().stop();
1780                                 saveSone(soneInserter.getKey());
1781                         }
1782                 }
1783                 saveConfiguration();
1784                 database.stop();
1785                 webOfTrustUpdater.stop();
1786                 updateChecker.stop();
1787                 soneDownloader.stop();
1788                 soneDownloaders.shutdown();
1789                 identityManager.stop();
1790         }
1791
1792         //
1793         // PRIVATE METHODS
1794         //
1795
1796         /**
1797          * Saves the given Sone. This will persist all local settings for the given
1798          * Sone, such as the friends list and similar, private options.
1799          *
1800          * @param sone
1801          *            The Sone to save
1802          */
1803         private synchronized void saveSone(Sone sone) {
1804                 if (!sone.isLocal()) {
1805                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1806                         return;
1807                 }
1808                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1809                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1810                         return;
1811                 }
1812
1813                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1814                 try {
1815                         /* save Sone into configuration. */
1816                         String sonePrefix = "Sone/" + sone.getId();
1817                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1818                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1819
1820                         /* save profile. */
1821                         Profile profile = sone.getProfile();
1822                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1823                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1824                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1825                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1826                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1827                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1828                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1829
1830                         /* save profile fields. */
1831                         int fieldCounter = 0;
1832                         for (Field profileField : profile.getFields()) {
1833                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1834                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1835                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1836                         }
1837                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1838
1839                         /* save posts. */
1840                         int postCounter = 0;
1841                         for (Post post : sone.getPosts()) {
1842                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1843                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1844                                 configuration.getStringValue(postPrefix + "/Recipient").setValue(post.getRecipientId().orNull());
1845                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1846                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1847                         }
1848                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1849
1850                         /* save replies. */
1851                         int replyCounter = 0;
1852                         for (PostReply reply : sone.getReplies()) {
1853                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1854                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1855                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1856                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1857                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1858                         }
1859                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1860
1861                         /* save post likes. */
1862                         int postLikeCounter = 0;
1863                         for (String postId : sone.getLikedPostIds()) {
1864                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1865                         }
1866                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1867
1868                         /* save reply likes. */
1869                         int replyLikeCounter = 0;
1870                         for (String replyId : sone.getLikedReplyIds()) {
1871                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1872                         }
1873                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1874
1875                         /* save friends. */
1876                         int friendCounter = 0;
1877                         for (String friendId : sone.getFriends()) {
1878                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1879                         }
1880                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1881
1882                         /* save albums. first, collect in a flat structure, top-level first. */
1883                         List<Album> albums = FluentIterable.from(sone.getRootAlbum().getAlbums()).transformAndConcat(Album.FLATTENER).toList();
1884
1885                         int albumCounter = 0;
1886                         for (Album album : albums) {
1887                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1888                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1889                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1890                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1891                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent().equals(sone.getRootAlbum()) ? null : album.getParent().getId());
1892                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1893                         }
1894                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1895
1896                         /* save images. */
1897                         int imageCounter = 0;
1898                         for (Album album : albums) {
1899                                 for (Image image : album.getImages()) {
1900                                         if (!image.isInserted()) {
1901                                                 continue;
1902                                         }
1903                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1904                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1905                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1906                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1907                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1908                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1909                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1910                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1911                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1912                                 }
1913                         }
1914                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1915
1916                         /* save options. */
1917                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1918                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
1919                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
1920                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
1921                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
1922                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
1923
1924                         configuration.save();
1925
1926                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1927
1928                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1929                 } catch (ConfigurationException ce1) {
1930                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1931                 }
1932         }
1933
1934         /**
1935          * Saves the current options.
1936          */
1937         private void saveConfiguration() {
1938                 synchronized (configuration) {
1939                         if (storingConfiguration) {
1940                                 logger.log(Level.FINE, "Already storing configuration…");
1941                                 return;
1942                         }
1943                         storingConfiguration = true;
1944                 }
1945
1946                 /* store the options first. */
1947                 try {
1948                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
1949                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1950                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
1951                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
1952                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
1953                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
1954                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
1955                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
1956                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
1957                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
1958                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
1959                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
1960
1961                         /* save known Sones. */
1962                         int soneCounter = 0;
1963                         synchronized (knownSones) {
1964                                 for (String knownSoneId : knownSones) {
1965                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1966                                 }
1967                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1968                         }
1969
1970                         /* save Sone following times. */
1971                         soneCounter = 0;
1972                         synchronized (soneFollowingTimes) {
1973                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
1974                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
1975                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
1976                                         ++soneCounter;
1977                                 }
1978                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
1979                         }
1980
1981                         /* save known posts. */
1982                         database.save();
1983
1984                         /* save bookmarked posts. */
1985                         int bookmarkedPostCounter = 0;
1986                         synchronized (bookmarkedPosts) {
1987                                 for (String bookmarkedPostId : bookmarkedPosts) {
1988                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
1989                                 }
1990                         }
1991                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
1992
1993                         /* now save it. */
1994                         configuration.save();
1995
1996                 } catch (ConfigurationException ce1) {
1997                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1998                 } catch (DatabaseException de1) {
1999                         logger.log(Level.SEVERE, "Could not save database!", de1);
2000                 } finally {
2001                         synchronized (configuration) {
2002                                 storingConfiguration = false;
2003                         }
2004                 }
2005         }
2006
2007         /**
2008          * Loads the configuration.
2009          */
2010         private void loadConfiguration() {
2011                 /* create options. */
2012                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
2013
2014                         @Override
2015                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2016                                 SoneInserter.setInsertionDelay(newValue);
2017                         }
2018
2019                 }));
2020                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2021                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2022                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2023                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2024                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
2025                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
2026                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
2027                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2028                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
2029
2030                         @Override
2031                         @SuppressWarnings("synthetic-access")
2032                         public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
2033                                 fcpInterface.setActive(newValue);
2034                         }
2035                 }));
2036                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
2037
2038                         @Override
2039                         @SuppressWarnings("synthetic-access")
2040                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2041                                 fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
2042                         }
2043
2044                 }));
2045
2046                 loadConfigurationValue("InsertionDelay");
2047                 loadConfigurationValue("PostsPerPage");
2048                 loadConfigurationValue("ImagesPerPage");
2049                 loadConfigurationValue("CharactersPerPost");
2050                 loadConfigurationValue("PostCutOffLength");
2051                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
2052                 loadConfigurationValue("PositiveTrust");
2053                 loadConfigurationValue("NegativeTrust");
2054                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2055                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2056                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2057
2058                 /* load known Sones. */
2059                 int soneCounter = 0;
2060                 while (true) {
2061                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2062                         if (knownSoneId == null) {
2063                                 break;
2064                         }
2065                         synchronized (knownSones) {
2066                                 knownSones.add(knownSoneId);
2067                         }
2068                 }
2069
2070                 /* load Sone following times. */
2071                 soneCounter = 0;
2072                 while (true) {
2073                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2074                         if (soneId == null) {
2075                                 break;
2076                         }
2077                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2078                         synchronized (soneFollowingTimes) {
2079                                 soneFollowingTimes.put(soneId, time);
2080                         }
2081                         ++soneCounter;
2082                 }
2083
2084                 /* load bookmarked posts. */
2085                 int bookmarkedPostCounter = 0;
2086                 while (true) {
2087                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2088                         if (bookmarkedPostId == null) {
2089                                 break;
2090                         }
2091                         synchronized (bookmarkedPosts) {
2092                                 bookmarkedPosts.add(bookmarkedPostId);
2093                         }
2094                 }
2095
2096         }
2097
2098         /**
2099          * Loads an {@link Integer} configuration value for the option with the
2100          * given name, logging validation failures.
2101          *
2102          * @param optionName
2103          *            The name of the option to load
2104          */
2105         private void loadConfigurationValue(String optionName) {
2106                 try {
2107                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2108                 } catch (IllegalArgumentException iae1) {
2109                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2110                 }
2111         }
2112
2113         /**
2114          * Notifies the core that a new {@link OwnIdentity} was added.
2115          *
2116          * @param ownIdentityAddedEvent
2117          *            The event
2118          */
2119         @Subscribe
2120         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2121                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2122                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2123                 if (ownIdentity.hasContext("Sone")) {
2124                         addLocalSone(ownIdentity);
2125                 }
2126         }
2127
2128         /**
2129          * Notifies the core that an {@link OwnIdentity} was removed.
2130          *
2131          * @param ownIdentityRemovedEvent
2132          *            The event
2133          */
2134         @Subscribe
2135         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2136                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2137                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2138                 trustedIdentities.removeAll(ownIdentity);
2139         }
2140
2141         /**
2142          * Notifies the core that a new {@link Identity} was added.
2143          *
2144          * @param identityAddedEvent
2145          *            The event
2146          */
2147         @Subscribe
2148         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2149                 Identity identity = identityAddedEvent.identity();
2150                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2151                 trustedIdentities.put(identityAddedEvent.ownIdentity(), identity);
2152                 addRemoteSone(identity);
2153         }
2154
2155         /**
2156          * Notifies the core that an {@link Identity} was updated.
2157          *
2158          * @param identityUpdatedEvent
2159          *            The event
2160          */
2161         @Subscribe
2162         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2163                 final Identity identity = identityUpdatedEvent.identity();
2164                 soneDownloaders.execute(new Runnable() {
2165
2166                         @Override
2167                         @SuppressWarnings("synthetic-access")
2168                         public void run() {
2169                                 Sone sone = getRemoteSone(identity.getId(), false);
2170                                 if (sone.isLocal()) {
2171                                         return;
2172                                 }
2173                                 sone.setIdentity(identity);
2174                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2175                                 soneDownloader.addSone(sone);
2176                                 soneDownloader.fetchSone(sone);
2177                         }
2178                 });
2179         }
2180
2181         /**
2182          * Notifies the core that an {@link Identity} was removed.
2183          *
2184          * @param identityRemovedEvent
2185          *            The event
2186          */
2187         @Subscribe
2188         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2189                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2190                 Identity identity = identityRemovedEvent.identity();
2191                 trustedIdentities.remove(ownIdentity, identity);
2192                 boolean foundIdentity = false;
2193                 for (Entry<OwnIdentity, Collection<Identity>> trustedIdentity : trustedIdentities.asMap().entrySet()) {
2194                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2195                                 continue;
2196                         }
2197                         if (trustedIdentity.getValue().contains(identity)) {
2198                                 foundIdentity = true;
2199                         }
2200                 }
2201                 if (foundIdentity) {
2202                         /* some local identity still trusts this identity, don’t remove. */
2203                         return;
2204                 }
2205                 Optional<Sone> sone = getSone(identity.getId());
2206                 if (!sone.isPresent()) {
2207                         /* TODO - we don’t have the Sone anymore. should this happen? */
2208                         return;
2209                 }
2210                 database.removePosts(sone.get());
2211                 for (Post post : sone.get().getPosts()) {
2212                         eventBus.post(new PostRemovedEvent(post));
2213                 }
2214                 database.removePostReplies(sone.get());
2215                 for (PostReply reply : sone.get().getReplies()) {
2216                         eventBus.post(new PostReplyRemovedEvent(reply));
2217                 }
2218                 synchronized (sones) {
2219                         sones.remove(identity.getId());
2220                 }
2221                 eventBus.post(new SoneRemovedEvent(sone.get()));
2222         }
2223
2224         /**
2225          * Deletes the temporary image.
2226          *
2227          * @param imageInsertFinishedEvent
2228          *            The event
2229          */
2230         @Subscribe
2231         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2232                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2233                 imageInsertFinishedEvent.image().setKey(imageInsertFinishedEvent.resultingUri().toString());
2234                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2235                 touchConfiguration();
2236         }
2237
2238 }