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